diff options
| author | Jiri Kosina <jkosina@suse.cz> | 2013-01-29 10:48:30 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-01-29 10:48:30 +0100 |
| commit | 617677295b53a40d0e54aac4cbbc216ffbc755dd (patch) | |
| tree | 51b9e87213243ed5efff252c8e8d8fec4eebc588 /fs | |
| parent | 5c8d1b68e01a144813e38795fe6dbe7ebb506131 (diff) | |
| parent | 6abb7c25775b7fb2225ad0508236d63ca710e65f (diff) | |
Merge branch 'master' into for-next
Conflicts:
drivers/devfreq/exynos4_bus.c
Sync with Linus' tree to be able to apply patches that are
against newer code (mvneta).
Diffstat (limited to 'fs')
458 files changed, 34025 insertions, 10307 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index f95ae3a027f..780725a463b 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -28,8 +28,8 @@ config FS_MBCACHE tristate default y if EXT2_FS=y && EXT2_FS_XATTR default y if EXT3_FS=y && EXT3_FS_XATTR - default y if EXT4_FS=y && EXT4_FS_XATTR - default m if EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS_XATTR + default y if EXT4_FS=y + default m if EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4_FS source "fs/reiserfs/Kconfig" source "fs/jfs/Kconfig" @@ -68,16 +68,6 @@ source "fs/quota/Kconfig" source "fs/autofs4/Kconfig" source "fs/fuse/Kconfig" -config CUSE - tristate "Character device in Userspace support" - depends on FUSE_FS - help - This FUSE extension allows character devices to be - implemented in userspace. - - If you want to develop or use userspace character device - based on CUSE, answer Y or M. - config GENERIC_ACL bool select FS_POSIX_ACL @@ -220,6 +210,7 @@ source "fs/pstore/Kconfig" source "fs/sysv/Kconfig" source "fs/ufs/Kconfig" source "fs/exofs/Kconfig" +source "fs/f2fs/Kconfig" endif # MISC_FILESYSTEMS diff --git a/fs/Makefile b/fs/Makefile index 1d7af79288a..9d53192236f 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -123,6 +123,7 @@ obj-$(CONFIG_DEBUG_FS) += debugfs/ obj-$(CONFIG_OCFS2_FS) += ocfs2/ obj-$(CONFIG_BTRFS_FS) += btrfs/ obj-$(CONFIG_GFS2_FS) += gfs2/ +obj-$(CONFIG_F2FS_FS) += f2fs/ obj-y += exofs/ # Multiple modules obj-$(CONFIG_CEPH_FS) += ceph/ obj-$(CONFIG_PSTORE) += pstore/ diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c index e9bad5093a3..5f95d1ed9c6 100644 --- a/fs/adfs/inode.c +++ b/fs/adfs/inode.c @@ -45,6 +45,14 @@ static int adfs_readpage(struct file *file, struct page *page) return block_read_full_page(page, adfs_get_block); } +static void adfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) + truncate_pagecache(inode, to, inode->i_size); +} + static int adfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -55,11 +63,8 @@ static int adfs_write_begin(struct file *file, struct address_space *mapping, ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, adfs_get_block, &ADFS_I(mapping->host)->mmu_private); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + adfs_write_failed(mapping, pos + len); return ret; } diff --git a/fs/affs/file.c b/fs/affs/file.c index 2f4c935cb32..af3261b7810 100644 --- a/fs/affs/file.c +++ b/fs/affs/file.c @@ -39,7 +39,6 @@ const struct file_operations affs_file_operations = { }; const struct inode_operations affs_file_inode_operations = { - .truncate = affs_truncate, .setattr = affs_notify_change, }; @@ -402,6 +401,16 @@ static int affs_readpage(struct file *file, struct page *page) return block_read_full_page(page, affs_get_block); } +static void affs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + affs_truncate(inode); + } +} + static int affs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -412,11 +421,8 @@ static int affs_write_begin(struct file *file, struct address_space *mapping, ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, affs_get_block, &AFFS_I(mapping->host)->mmu_private); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + affs_write_failed(mapping, pos + len); return ret; } diff --git a/fs/affs/inode.c b/fs/affs/inode.c index 15c48426822..0e092d08680 100644 --- a/fs/affs/inode.c +++ b/fs/affs/inode.c @@ -237,9 +237,12 @@ affs_notify_change(struct dentry *dentry, struct iattr *attr) if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, attr->ia_size); + error = inode_newsize_ok(inode, attr->ia_size); if (error) return error; + + truncate_setsize(inode, attr->ia_size); + affs_truncate(inode); } setattr_copy(inode, attr); diff --git a/fs/attr.c b/fs/attr.c index cce7df53b69..1449adb14ef 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -49,14 +49,15 @@ int inode_change_ok(const struct inode *inode, struct iattr *attr) /* Make sure a caller can chown. */ if ((ia_valid & ATTR_UID) && (!uid_eq(current_fsuid(), inode->i_uid) || - !uid_eq(attr->ia_uid, inode->i_uid)) && !capable(CAP_CHOWN)) + !uid_eq(attr->ia_uid, inode->i_uid)) && + !inode_capable(inode, CAP_CHOWN)) return -EPERM; /* Make sure caller can chgrp. */ if ((ia_valid & ATTR_GID) && (!uid_eq(current_fsuid(), inode->i_uid) || (!in_group_p(attr->ia_gid) && !gid_eq(attr->ia_gid, inode->i_gid))) && - !capable(CAP_CHOWN)) + !inode_capable(inode, CAP_CHOWN)) return -EPERM; /* Make sure a caller can chmod. */ @@ -65,7 +66,8 @@ int inode_change_ok(const struct inode *inode, struct iattr *attr) return -EPERM; /* Also check the setgid bit! */ if (!in_group_p((ia_valid & ATTR_GID) ? attr->ia_gid : - inode->i_gid) && !capable(CAP_FSETID)) + inode->i_gid) && + !inode_capable(inode, CAP_FSETID)) attr->ia_mode &= ~S_ISGID; } @@ -157,7 +159,8 @@ void setattr_copy(struct inode *inode, const struct iattr *attr) if (ia_valid & ATTR_MODE) { umode_t mode = attr->ia_mode; - if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) + if (!in_group_p(inode->i_gid) && + !inode_capable(inode, CAP_FSETID)) mode &= ~S_ISGID; inode->i_mode = mode; } diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index 908e1845541..b785e770795 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -74,8 +74,8 @@ struct autofs_info { unsigned long last_used; atomic_t count; - uid_t uid; - gid_t gid; + kuid_t uid; + kgid_t gid; }; #define AUTOFS_INF_EXPIRING (1<<0) /* dentry is in the process of expiring */ @@ -89,8 +89,8 @@ struct autofs_wait_queue { struct qstr name; u32 dev; u64 ino; - uid_t uid; - gid_t gid; + kuid_t uid; + kgid_t gid; pid_t pid; pid_t tgid; /* This is for status reporting upon return */ diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c index a16214109d3..9f68a37bb2b 100644 --- a/fs/autofs4/dev-ioctl.c +++ b/fs/autofs4/dev-ioctl.c @@ -437,8 +437,8 @@ static int autofs_dev_ioctl_requester(struct file *fp, err = 0; autofs4_expire_wait(path.dentry); spin_lock(&sbi->fs_lock); - param->requester.uid = ino->uid; - param->requester.gid = ino->gid; + param->requester.uid = from_kuid_munged(current_user_ns(), ino->uid); + param->requester.gid = from_kgid_munged(current_user_ns(), ino->gid); spin_unlock(&sbi->fs_lock); } path_put(&path); diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c index 842d00048a6..01443ce43ee 100644 --- a/fs/autofs4/expire.c +++ b/fs/autofs4/expire.c @@ -548,15 +548,6 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, spin_lock(&sbi->fs_lock); ino->flags &= ~AUTOFS_INF_EXPIRING; - spin_lock(&dentry->d_lock); - if (!ret) { - if ((IS_ROOT(dentry) || - (autofs_type_indirect(sbi->type) && - IS_ROOT(dentry->d_parent))) && - !(dentry->d_flags & DCACHE_NEED_AUTOMOUNT)) - __managed_dentry_set_automount(dentry); - } - spin_unlock(&dentry->d_lock); complete_all(&ino->expire_complete); spin_unlock(&sbi->fs_lock); dput(dentry); diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index 8a4fed8ead3..b104726e2d0 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -36,8 +36,8 @@ struct autofs_info *autofs4_new_ino(struct autofs_sb_info *sbi) void autofs4_clean_ino(struct autofs_info *ino) { - ino->uid = 0; - ino->gid = 0; + ino->uid = GLOBAL_ROOT_UID; + ino->gid = GLOBAL_ROOT_GID; ino->last_used = jiffies; } @@ -79,10 +79,12 @@ static int autofs4_show_options(struct seq_file *m, struct dentry *root) return 0; seq_printf(m, ",fd=%d", sbi->pipefd); - if (root_inode->i_uid != 0) - seq_printf(m, ",uid=%u", root_inode->i_uid); - if (root_inode->i_gid != 0) - seq_printf(m, ",gid=%u", root_inode->i_gid); + if (!uid_eq(root_inode->i_uid, GLOBAL_ROOT_UID)) + seq_printf(m, ",uid=%u", + from_kuid_munged(&init_user_ns, root_inode->i_uid)); + if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID)) + seq_printf(m, ",gid=%u", + from_kgid_munged(&init_user_ns, root_inode->i_gid)); seq_printf(m, ",pgrp=%d", sbi->oz_pgrp); seq_printf(m, ",timeout=%lu", sbi->exp_timeout/HZ); seq_printf(m, ",minproto=%d", sbi->min_proto); @@ -126,7 +128,7 @@ static const match_table_t tokens = { {Opt_err, NULL} }; -static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid, +static int parse_options(char *options, int *pipefd, kuid_t *uid, kgid_t *gid, pid_t *pgrp, unsigned int *type, int *minproto, int *maxproto) { char *p; @@ -159,12 +161,16 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid, case Opt_uid: if (match_int(args, &option)) return 1; - *uid = option; + *uid = make_kuid(current_user_ns(), option); + if (!uid_valid(*uid)) + return 1; break; case Opt_gid: if (match_int(args, &option)) return 1; - *gid = option; + *gid = make_kgid(current_user_ns(), option); + if (!gid_valid(*gid)) + return 1; break; case Opt_pgrp: if (match_int(args, &option)) diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index 91b11650722..c93447604da 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -124,13 +124,10 @@ static int autofs4_dir_open(struct inode *inode, struct file *file) * it. */ spin_lock(&sbi->lookup_lock); - spin_lock(&dentry->d_lock); - if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) { - spin_unlock(&dentry->d_lock); + if (!d_mountpoint(dentry) && simple_empty(dentry)) { spin_unlock(&sbi->lookup_lock); return -ENOENT; } - spin_unlock(&dentry->d_lock); spin_unlock(&sbi->lookup_lock); out: @@ -355,7 +352,6 @@ static struct vfsmount *autofs4_d_automount(struct path *path) status = autofs4_mount_wait(dentry); if (status) return ERR_PTR(status); - spin_lock(&sbi->fs_lock); goto done; } @@ -364,8 +360,11 @@ static struct vfsmount *autofs4_d_automount(struct path *path) * having d_mountpoint() true, so there's no need to call back * to the daemon. */ - if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) + if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) { + spin_unlock(&sbi->fs_lock); goto done; + } + if (!d_mountpoint(dentry)) { /* * It's possible that user space hasn't removed directories @@ -379,15 +378,13 @@ static struct vfsmount *autofs4_d_automount(struct path *path) * require user space behave. */ if (sbi->version > 4) { - if (have_submounts(dentry)) + if (have_submounts(dentry)) { + spin_unlock(&sbi->fs_lock); goto done; + } } else { - spin_lock(&dentry->d_lock); - if (!list_empty(&dentry->d_subdirs)) { - spin_unlock(&dentry->d_lock); + if (!simple_empty(dentry)) goto done; - } - spin_unlock(&dentry->d_lock); } ino->flags |= AUTOFS_INF_PENDING; spin_unlock(&sbi->fs_lock); @@ -399,28 +396,8 @@ static struct vfsmount *autofs4_d_automount(struct path *path) return ERR_PTR(status); } } -done: - if (!(ino->flags & AUTOFS_INF_EXPIRING)) { - /* - * Any needed mounting has been completed and the path - * updated so clear DCACHE_NEED_AUTOMOUNT so we don't - * call ->d_automount() on rootless multi-mounts since - * it can lead to an incorrect ELOOP error return. - * - * Only clear DMANAGED_AUTOMOUNT for rootless multi-mounts and - * symlinks as in all other cases the dentry will be covered by - * an actual mount so ->d_automount() won't be called during - * the follow. - */ - spin_lock(&dentry->d_lock); - if ((!d_mountpoint(dentry) && - !list_empty(&dentry->d_subdirs)) || - (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode))) - __managed_dentry_clear_automount(dentry); - spin_unlock(&dentry->d_lock); - } spin_unlock(&sbi->fs_lock); - +done: /* Mount succeeded, check if we ended up with a new dentry */ dentry = autofs4_mountpoint_changed(path); if (!dentry) @@ -432,6 +409,8 @@ done: int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) { struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); + struct autofs_info *ino = autofs4_dentry_ino(dentry); + int status; DPRINTK("dentry=%p %.*s", dentry, dentry->d_name.len, dentry->d_name.name); @@ -456,7 +435,32 @@ int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) * This dentry may be under construction so wait on mount * completion. */ - return autofs4_mount_wait(dentry); + status = autofs4_mount_wait(dentry); + if (status) + return status; + + spin_lock(&sbi->fs_lock); + /* + * If the dentry has been selected for expire while we slept + * on the lock then it might go away. We'll deal with that in + * ->d_automount() and wait on a new mount if the expire + * succeeds or return here if it doesn't (since there's no + * mount to follow with a rootless multi-mount). + */ + if (!(ino->flags & AUTOFS_INF_EXPIRING)) { + /* + * Any needed mounting has been completed and the path + * updated so check if this is a rootless multi-mount so + * we can avoid needless calls ->d_automount() and avoid + * an incorrect ELOOP error return. + */ + if ((!d_mountpoint(dentry) && !simple_empty(dentry)) || + (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode))) + status = -EISDIR; + } + spin_unlock(&sbi->fs_lock); + + return status; } /* Lookups in the root directory */ @@ -599,9 +603,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry) spin_lock(&sbi->lookup_lock); __autofs4_add_expiring(dentry); - spin_lock(&dentry->d_lock); - __d_drop(dentry); - spin_unlock(&dentry->d_lock); + d_drop(dentry); spin_unlock(&sbi->lookup_lock); return 0; @@ -672,15 +674,12 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry) return -EACCES; spin_lock(&sbi->lookup_lock); - spin_lock(&dentry->d_lock); - if (!list_empty(&dentry->d_subdirs)) { - spin_unlock(&dentry->d_lock); + if (!simple_empty(dentry)) { spin_unlock(&sbi->lookup_lock); return -ENOTEMPTY; } __autofs4_add_expiring(dentry); - __d_drop(dentry); - spin_unlock(&dentry->d_lock); + d_drop(dentry); spin_unlock(&sbi->lookup_lock); if (sbi->version < 5) diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c index dce436e595c..03bc1d347d8 100644 --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -154,6 +154,7 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi, case autofs_ptype_expire_direct: { struct autofs_v5_packet *packet = &pkt.v5_pkt.v5_packet; + struct user_namespace *user_ns = sbi->pipe->f_cred->user_ns; pktsz = sizeof(*packet); @@ -163,8 +164,8 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi, packet->name[wq->name.len] = '\0'; packet->dev = wq->dev; packet->ino = wq->ino; - packet->uid = wq->uid; - packet->gid = wq->gid; + packet->uid = from_kuid_munged(user_ns, wq->uid); + packet->gid = from_kgid_munged(user_ns, wq->gid); packet->pid = wq->pid; packet->tgid = wq->tgid; break; diff --git a/fs/bad_inode.c b/fs/bad_inode.c index b1342ffb3cf..922ad460bff 100644 --- a/fs/bad_inode.c +++ b/fs/bad_inode.c @@ -16,7 +16,7 @@ #include <linux/poll.h> -static loff_t bad_file_llseek(struct file *file, loff_t offset, int origin) +static loff_t bad_file_llseek(struct file *file, loff_t offset, int whence) { return -EIO; } diff --git a/fs/bfs/file.c b/fs/bfs/file.c index f20e8a71062..ad3ea1497cc 100644 --- a/fs/bfs/file.c +++ b/fs/bfs/file.c @@ -161,6 +161,14 @@ static int bfs_readpage(struct file *file, struct page *page) return block_read_full_page(page, bfs_get_block); } +static void bfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) + truncate_pagecache(inode, to, inode->i_size); +} + static int bfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -169,11 +177,8 @@ static int bfs_write_begin(struct file *file, struct address_space *mapping, ret = block_write_begin(mapping, pos, len, flags, pagep, bfs_get_block); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + bfs_write_failed(mapping, pos + len); return ret; } diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c index 0e7a6f81ae3..6043567b95c 100644 --- a/fs/binfmt_aout.c +++ b/fs/binfmt_aout.c @@ -30,7 +30,7 @@ #include <asm/cacheflush.h> #include <asm/a.out-core.h> -static int load_aout_binary(struct linux_binprm *, struct pt_regs * regs); +static int load_aout_binary(struct linux_binprm *); static int load_aout_library(struct file*); #ifdef CONFIG_COREDUMP @@ -201,8 +201,9 @@ static unsigned long __user *create_aout_tables(char __user *p, struct linux_bin * libraries. There is no binary dependent code anywhere else. */ -static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs) +static int load_aout_binary(struct linux_binprm * bprm) { + struct pt_regs *regs = current_pt_regs(); struct exec ex; unsigned long error; unsigned long fd_offset; diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index fbd9f60bd76..0c42cdbabec 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -44,7 +44,7 @@ #define user_siginfo_t siginfo_t #endif -static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs); +static int load_elf_binary(struct linux_binprm *bprm); static int load_elf_library(struct file *); static unsigned long elf_map(struct file *, unsigned long, struct elf_phdr *, int, int, unsigned long); @@ -558,7 +558,7 @@ static unsigned long randomize_stack_top(unsigned long stack_top) #endif } -static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) +static int load_elf_binary(struct linux_binprm *bprm) { struct file *interpreter = NULL; /* to shut gcc up */ unsigned long load_addr = 0, load_bias = 0; @@ -575,6 +575,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) unsigned long reloc_func_desc __maybe_unused = 0; int executable_stack = EXSTACK_DEFAULT; unsigned long def_flags = 0; + struct pt_regs *regs = current_pt_regs(); struct { struct elfhdr elf_ex; struct elfhdr interp_elf_ex; @@ -1600,8 +1601,10 @@ static int fill_note_info(struct elfhdr *elf, int phdrs, info->thread = NULL; psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL); - if (psinfo == NULL) + if (psinfo == NULL) { + info->psinfo.data = NULL; /* So we don't free this wrongly */ return 0; + } fill_note(&info->psinfo, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo); diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index a4604915410..dc84732e554 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -56,7 +56,7 @@ typedef char *elf_caddr_t; MODULE_LICENSE("GPL"); -static int load_elf_fdpic_binary(struct linux_binprm *, struct pt_regs *); +static int load_elf_fdpic_binary(struct linux_binprm *); static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *, struct file *); static int elf_fdpic_map_file(struct elf_fdpic_params *, struct file *, struct mm_struct *, const char *); @@ -164,10 +164,10 @@ static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, /* * load an fdpic binary into various bits of memory */ -static int load_elf_fdpic_binary(struct linux_binprm *bprm, - struct pt_regs *regs) +static int load_elf_fdpic_binary(struct linux_binprm *bprm) { struct elf_fdpic_params exec_params, interp_params; + struct pt_regs *regs = current_pt_regs(); struct elf_phdr *phdr; unsigned long stack_size, entryaddr; #ifdef ELF_FDPIC_PLAT_INIT diff --git a/fs/binfmt_em86.c b/fs/binfmt_em86.c index 2790c7e1912..037a3e2b045 100644 --- a/fs/binfmt_em86.c +++ b/fs/binfmt_em86.c @@ -22,7 +22,7 @@ #define EM86_INTERP "/usr/bin/em86" #define EM86_I_NAME "em86" -static int load_em86(struct linux_binprm *bprm,struct pt_regs *regs) +static int load_em86(struct linux_binprm *bprm) { char *interp, *i_name, *i_arg; struct file * file; @@ -42,7 +42,6 @@ static int load_em86(struct linux_binprm *bprm,struct pt_regs *regs) return -ENOEXEC; } - bprm->recursion_depth++; /* Well, the bang-shell is implicit... */ allow_write_access(bprm->file); fput(bprm->file); bprm->file = NULL; @@ -90,7 +89,7 @@ static int load_em86(struct linux_binprm *bprm,struct pt_regs *regs) if (retval < 0) return retval; - return search_binary_handler(bprm, regs); + return search_binary_handler(bprm); } static struct linux_binfmt em86_format = { diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index e280352b28f..b56371981d1 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -88,7 +88,7 @@ struct lib_info { static int load_flat_shared_library(int id, struct lib_info *p); #endif -static int load_flat_binary(struct linux_binprm *, struct pt_regs * regs); +static int load_flat_binary(struct linux_binprm *); static int flat_core_dump(struct coredump_params *cprm); static struct linux_binfmt flat_format = { @@ -858,9 +858,10 @@ out: * libraries. There is no binary dependent code anywhere else. */ -static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs) +static int load_flat_binary(struct linux_binprm * bprm) { struct lib_info libinfo; + struct pt_regs *regs = current_pt_regs(); unsigned long p = bprm->p; unsigned long stack_len; unsigned long start_addr; diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 790b3cddca6..0c8869fdd14 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -104,7 +104,7 @@ static Node *check_file(struct linux_binprm *bprm) /* * the loader itself */ -static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs) +static int load_misc_binary(struct linux_binprm *bprm) { Node *fmt; struct file * interp_file = NULL; @@ -117,10 +117,6 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs) if (!enabled) goto _ret; - retval = -ENOEXEC; - if (bprm->recursion_depth > BINPRM_MAX_RECURSION) - goto _ret; - /* to keep locking time low, we copy the interpreter string */ read_lock(&entries_lock); fmt = check_file(bprm); @@ -176,7 +172,10 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs) goto _error; bprm->argc ++; - bprm->interp = iname; /* for binfmt_script */ + /* Update interp in case binfmt_script needs it. */ + retval = bprm_change_interp(iname, bprm); + if (retval < 0) + goto _error; interp_file = open_exec (iname); retval = PTR_ERR (interp_file); @@ -197,9 +196,7 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs) if (retval < 0) goto _error; - bprm->recursion_depth++; - - retval = search_binary_handler (bprm, regs); + retval = search_binary_handler(bprm); if (retval < 0) goto _error; diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c index d3b8c1f6315..5027a3e1492 100644 --- a/fs/binfmt_script.c +++ b/fs/binfmt_script.c @@ -14,7 +14,7 @@ #include <linux/err.h> #include <linux/fs.h> -static int load_script(struct linux_binprm *bprm,struct pt_regs *regs) +static int load_script(struct linux_binprm *bprm) { const char *i_arg, *i_name; char *cp; @@ -22,15 +22,13 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs) char interp[BINPRM_BUF_SIZE]; int retval; - if ((bprm->buf[0] != '#') || (bprm->buf[1] != '!') || - (bprm->recursion_depth > BINPRM_MAX_RECURSION)) + if ((bprm->buf[0] != '#') || (bprm->buf[1] != '!')) return -ENOEXEC; /* * This section does the #! interpretation. * Sorta complicated, but hopefully it will work. -TYT */ - bprm->recursion_depth++; allow_write_access(bprm->file); fput(bprm->file); bprm->file = NULL; @@ -82,7 +80,9 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs) retval = copy_strings_kernel(1, &i_name, bprm); if (retval) return retval; bprm->argc++; - bprm->interp = interp; + retval = bprm_change_interp(interp, bprm); + if (retval < 0) + return retval; /* * OK, now restart the process with the interpreter's dentry. @@ -95,7 +95,7 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs) retval = prepare_binprm(bprm); if (retval < 0) return retval; - return search_binary_handler(bprm,regs); + return search_binary_handler(bprm); } static struct linux_binfmt script_format = { diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c index 4517aaff61b..4e00ed68d4a 100644 --- a/fs/binfmt_som.c +++ b/fs/binfmt_som.c @@ -35,7 +35,7 @@ #include <linux/elf.h> -static int load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs); +static int load_som_binary(struct linux_binprm * bprm); static int load_som_library(struct file *); /* @@ -180,13 +180,14 @@ out: */ static int -load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs) +load_som_binary(struct linux_binprm * bprm) { int retval; unsigned int size; unsigned long som_entry; struct som_hdr *som_ex; struct som_exec_auxhdr *hpuxhdr; + struct pt_regs *regs = current_pt_regs(); /* Get the exec-header */ som_ex = (struct som_hdr *) bprm->buf; @@ -75,6 +75,7 @@ static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size) unsigned int sz = sizeof(struct bio) + extra_size; struct kmem_cache *slab = NULL; struct bio_slab *bslab, *new_bio_slabs; + unsigned int new_bio_slab_max; unsigned int i, entry = -1; mutex_lock(&bio_slab_lock); @@ -97,12 +98,13 @@ static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size) goto out_unlock; if (bio_slab_nr == bio_slab_max && entry == -1) { - bio_slab_max <<= 1; + new_bio_slab_max = bio_slab_max << 1; new_bio_slabs = krealloc(bio_slabs, - bio_slab_max * sizeof(struct bio_slab), + new_bio_slab_max * sizeof(struct bio_slab), GFP_KERNEL); if (!new_bio_slabs) goto out_unlock; + bio_slab_max = new_bio_slab_max; bio_slabs = new_bio_slabs; } if (entry == -1) diff --git a/fs/block_dev.c b/fs/block_dev.c index b3c1d3dae77..172f8491a2b 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -70,19 +70,6 @@ static void bdev_inode_switch_bdi(struct inode *inode, spin_unlock(&dst->wb.list_lock); } -sector_t blkdev_max_block(struct block_device *bdev) -{ - sector_t retval = ~((sector_t)0); - loff_t sz = i_size_read(bdev->bd_inode); - - if (sz) { - unsigned int size = block_size(bdev); - unsigned int sizebits = blksize_bits(size); - retval = (sz >> sizebits); - } - return retval; -} - /* Kill _all_ buffers and pagecache , dirty or not.. */ void kill_bdev(struct block_device *bdev) { @@ -116,8 +103,6 @@ EXPORT_SYMBOL(invalidate_bdev); int set_blocksize(struct block_device *bdev, int size) { - struct address_space *mapping; - /* Size must be a power of two, and between 512 and PAGE_SIZE */ if (size > PAGE_SIZE || size < 512 || !is_power_of_2(size)) return -EINVAL; @@ -126,19 +111,6 @@ int set_blocksize(struct block_device *bdev, int size) if (size < bdev_logical_block_size(bdev)) return -EINVAL; - /* Prevent starting I/O or mapping the device */ - percpu_down_write(&bdev->bd_block_size_semaphore); - - /* Check that the block device is not memory mapped */ - mapping = bdev->bd_inode->i_mapping; - mutex_lock(&mapping->i_mmap_mutex); - if (mapping_mapped(mapping)) { - mutex_unlock(&mapping->i_mmap_mutex); - percpu_up_write(&bdev->bd_block_size_semaphore); - return -EBUSY; - } - mutex_unlock(&mapping->i_mmap_mutex); - /* Don't change the size if it is same as current */ if (bdev->bd_block_size != size) { sync_blockdev(bdev); @@ -146,9 +118,6 @@ int set_blocksize(struct block_device *bdev, int size) bdev->bd_inode->i_blkbits = blksize_bits(size); kill_bdev(bdev); } - - percpu_up_write(&bdev->bd_block_size_semaphore); - return 0; } @@ -181,52 +150,12 @@ static int blkdev_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh, int create) { - if (iblock >= blkdev_max_block(I_BDEV(inode))) { - if (create) - return -EIO; - - /* - * for reads, we're just trying to fill a partial page. - * return a hole, they will have to call get_block again - * before they can fill it, and they will get -EIO at that - * time - */ - return 0; - } bh->b_bdev = I_BDEV(inode); bh->b_blocknr = iblock; set_buffer_mapped(bh); return 0; } -static int -blkdev_get_blocks(struct inode *inode, sector_t iblock, - struct buffer_head *bh, int create) -{ - sector_t end_block = blkdev_max_block(I_BDEV(inode)); - unsigned long max_blocks = bh->b_size >> inode->i_blkbits; - - if ((iblock + max_blocks) > end_block) { - max_blocks = end_block - iblock; - if ((long)max_blocks <= 0) { - if (create) - return -EIO; /* write fully beyond EOF */ - /* - * It is a read which is fully beyond EOF. We return - * a !buffer_mapped buffer - */ - max_blocks = 0; - } - } - - bh->b_bdev = I_BDEV(inode); - bh->b_blocknr = iblock; - bh->b_size = max_blocks << inode->i_blkbits; - if (max_blocks) - set_buffer_mapped(bh); - return 0; -} - static ssize_t blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) @@ -235,7 +164,7 @@ blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, struct inode *inode = file->f_mapping->host; return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iov, offset, - nr_segs, blkdev_get_blocks, NULL, NULL, 0); + nr_segs, blkdev_get_block, NULL, NULL, 0); } int __sync_blockdev(struct block_device *bdev, int wait) @@ -392,7 +321,7 @@ static int blkdev_write_end(struct file *file, struct address_space *mapping, * for a block special file file->f_path.dentry->d_inode->i_size is zero * so we compute the size by hand (just as in block_read/write above) */ -static loff_t block_llseek(struct file *file, loff_t offset, int origin) +static loff_t block_llseek(struct file *file, loff_t offset, int whence) { struct inode *bd_inode = file->f_mapping->host; loff_t size; @@ -402,7 +331,7 @@ static loff_t block_llseek(struct file *file, loff_t offset, int origin) size = i_size_read(bd_inode); retval = -EINVAL; - switch (origin) { + switch (whence) { case SEEK_END: offset += size; break; @@ -459,12 +388,6 @@ static struct inode *bdev_alloc_inode(struct super_block *sb) struct bdev_inode *ei = kmem_cache_alloc(bdev_cachep, GFP_KERNEL); if (!ei) return NULL; - - if (unlikely(percpu_init_rwsem(&ei->bdev.bd_block_size_semaphore))) { - kmem_cache_free(bdev_cachep, ei); - return NULL; - } - return &ei->vfs_inode; } @@ -473,8 +396,6 @@ static void bdev_i_callback(struct rcu_head *head) struct inode *inode = container_of(head, struct inode, i_rcu); struct bdev_inode *bdi = BDEV_I(inode); - percpu_free_rwsem(&bdi->bdev.bd_block_size_semaphore); - kmem_cache_free(bdev_cachep, bdi); } @@ -1593,22 +1514,6 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg) return blkdev_ioctl(bdev, mode, cmd, arg); } -ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) -{ - ssize_t ret; - struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host); - - percpu_down_read(&bdev->bd_block_size_semaphore); - - ret = generic_file_aio_read(iocb, iov, nr_segs, pos); - - percpu_up_read(&bdev->bd_block_size_semaphore); - - return ret; -} -EXPORT_SYMBOL_GPL(blkdev_aio_read); - /* * Write data to the block device. Only intended for the block device itself * and the raw driver which basically is a fake block device. @@ -1620,16 +1525,12 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) { struct file *file = iocb->ki_filp; - struct block_device *bdev = I_BDEV(file->f_mapping->host); struct blk_plug plug; ssize_t ret; BUG_ON(iocb->ki_pos != pos); blk_start_plug(&plug); - - percpu_down_read(&bdev->bd_block_size_semaphore); - ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos); if (ret > 0 || ret == -EIOCBQUEUED) { ssize_t err; @@ -1638,27 +1539,25 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, if (err < 0 && ret > 0) ret = err; } - - percpu_up_read(&bdev->bd_block_size_semaphore); - blk_finish_plug(&plug); - return ret; } EXPORT_SYMBOL_GPL(blkdev_aio_write); -static int blkdev_mmap(struct file *file, struct vm_area_struct *vma) +static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) { - int ret; - struct block_device *bdev = I_BDEV(file->f_mapping->host); - - percpu_down_read(&bdev->bd_block_size_semaphore); - - ret = generic_file_mmap(file, vma); + struct file *file = iocb->ki_filp; + struct inode *bd_inode = file->f_mapping->host; + loff_t size = i_size_read(bd_inode); - percpu_up_read(&bdev->bd_block_size_semaphore); + if (pos >= size) + return 0; - return ret; + size -= pos; + if (size < INT_MAX) + nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size); + return generic_file_aio_read(iocb, iov, nr_segs, pos); } /* @@ -1691,9 +1590,9 @@ const struct file_operations def_blk_fops = { .llseek = block_llseek, .read = do_sync_read, .write = do_sync_write, - .aio_read = blkdev_aio_read, + .aio_read = blkdev_aio_read, .aio_write = blkdev_aio_write, - .mmap = blkdev_mmap, + .mmap = generic_file_mmap, .fsync = blkdev_fsync, .unlocked_ioctl = block_ioctl, #ifdef CONFIG_COMPAT diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile index d7fcdba141a..7df3e0f0ee5 100644 --- a/fs/btrfs/Makefile +++ b/fs/btrfs/Makefile @@ -8,7 +8,7 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \ extent_io.o volumes.o async-thread.o ioctl.o locking.o orphan.o \ export.o tree-log.o free-space-cache.o zlib.o lzo.o \ compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \ - reada.o backref.o ulist.o qgroup.o send.o + reada.o backref.o ulist.o qgroup.o send.o dev-replace.o btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c index 0c16e3dbfd5..e15d2b0d8d3 100644 --- a/fs/btrfs/acl.c +++ b/fs/btrfs/acl.c @@ -121,6 +121,8 @@ static int btrfs_set_acl(struct btrfs_trans_handle *trans, ret = posix_acl_equiv_mode(acl, &inode->i_mode); if (ret < 0) return ret; + if (ret == 0) + acl = NULL; } ret = 0; break; diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 208d8aa5b07..04edf69be87 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -461,6 +461,7 @@ static int __merge_refs(struct list_head *head, int mode) pos2 = n2, n2 = pos2->next) { struct __prelim_ref *ref2; struct __prelim_ref *xchg; + struct extent_inode_elem *eie; ref2 = list_entry(pos2, struct __prelim_ref, list); @@ -472,12 +473,20 @@ static int __merge_refs(struct list_head *head, int mode) ref1 = ref2; ref2 = xchg; } - ref1->count += ref2->count; } else { if (ref1->parent != ref2->parent) continue; - ref1->count += ref2->count; } + + eie = ref1->inode_list; + while (eie && eie->next) + eie = eie->next; + if (eie) + eie->next = ref2->inode_list; + else + ref1->inode_list = ref2->inode_list; + ref1->count += ref2->count; + list_del(&ref2->list); kfree(ref2); } @@ -890,8 +899,7 @@ again: while (!list_empty(&prefs)) { ref = list_first_entry(&prefs, struct __prelim_ref, list); list_del(&ref->list); - if (ref->count < 0) - WARN_ON(1); + WARN_ON(ref->count < 0); if (ref->count && ref->root_id && ref->parent == 0) { /* no parent == root of tree */ ret = ulist_add(roots, ref->root_id, 0, GFP_NOFS); diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index ed8ca7ca5ef..2a8c242bc4f 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -39,6 +39,7 @@ #define BTRFS_INODE_HAS_ORPHAN_ITEM 5 #define BTRFS_INODE_HAS_ASYNC_EXTENT 6 #define BTRFS_INODE_NEEDS_FULL_SYNC 7 +#define BTRFS_INODE_COPY_EVERYTHING 8 /* in memory btrfs inode */ struct btrfs_inode { @@ -90,6 +91,9 @@ struct btrfs_inode { unsigned long runtime_flags; + /* Keep track of who's O_SYNC/fsycing currently */ + atomic_t sync_writers; + /* full 64 bit generation number, struct vfs_inode doesn't have a big * enough field for this. */ diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index 5a3e45db642..11d47bfb62b 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -137,7 +137,7 @@ struct btrfsic_block { unsigned int never_written:1; /* block was added because it was * referenced, not because it was * written */ - unsigned int mirror_num:2; /* large enough to hold + unsigned int mirror_num; /* large enough to hold * BTRFS_SUPER_MIRROR_MAX */ struct btrfsic_dev_state *dev_state; u64 dev_bytenr; /* key, physical byte num on disk */ @@ -723,7 +723,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state, } num_copies = - btrfs_num_copies(&state->root->fs_info->mapping_tree, + btrfs_num_copies(state->root->fs_info, next_bytenr, state->metablock_size); if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES) printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n", @@ -903,7 +903,7 @@ static int btrfsic_process_superblock_dev_mirror( } num_copies = - btrfs_num_copies(&state->root->fs_info->mapping_tree, + btrfs_num_copies(state->root->fs_info, next_bytenr, state->metablock_size); if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES) printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n", @@ -1287,7 +1287,7 @@ static int btrfsic_create_link_to_next_block( *next_blockp = NULL; if (0 == *num_copiesp) { *num_copiesp = - btrfs_num_copies(&state->root->fs_info->mapping_tree, + btrfs_num_copies(state->root->fs_info, next_bytenr, state->metablock_size); if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES) printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n", @@ -1489,7 +1489,7 @@ static int btrfsic_handle_extent_data( chunk_len = num_bytes; num_copies = - btrfs_num_copies(&state->root->fs_info->mapping_tree, + btrfs_num_copies(state->root->fs_info, next_bytenr, state->datablock_size); if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES) printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n", @@ -1582,9 +1582,21 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len, struct btrfs_device *device; length = len; - ret = btrfs_map_block(&state->root->fs_info->mapping_tree, READ, + ret = btrfs_map_block(state->root->fs_info, READ, bytenr, &length, &multi, mirror_num); + if (ret) { + block_ctx_out->start = 0; + block_ctx_out->dev_bytenr = 0; + block_ctx_out->len = 0; + block_ctx_out->dev = NULL; + block_ctx_out->datav = NULL; + block_ctx_out->pagev = NULL; + block_ctx_out->mem_to_free = NULL; + + return ret; + } + device = multi->stripes[0].dev; block_ctx_out->dev = btrfsic_dev_state_lookup(device->bdev); block_ctx_out->dev_bytenr = multi->stripes[0].physical; @@ -1594,8 +1606,7 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len, block_ctx_out->pagev = NULL; block_ctx_out->mem_to_free = NULL; - if (0 == ret) - kfree(multi); + kfree(multi); if (NULL == block_ctx_out->dev) { ret = -ENXIO; printk(KERN_INFO "btrfsic: error, cannot lookup dev (#1)!\n"); @@ -2463,7 +2474,7 @@ static int btrfsic_process_written_superblock( } num_copies = - btrfs_num_copies(&state->root->fs_info->mapping_tree, + btrfs_num_copies(state->root->fs_info, next_bytenr, BTRFS_SUPER_INFO_SIZE); if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES) printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n", @@ -2960,7 +2971,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state, struct btrfsic_block_data_ctx block_ctx; int match = 0; - num_copies = btrfs_num_copies(&state->root->fs_info->mapping_tree, + num_copies = btrfs_num_copies(state->root->fs_info, bytenr, state->metablock_size); for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) { diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index c6467aa88be..94ab2f80e7e 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -687,7 +687,8 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, ret = btrfs_map_bio(root, READ, comp_bio, mirror_num, 0); - BUG_ON(ret); /* -ENOMEM */ + if (ret) + bio_endio(comp_bio, ret); bio_put(comp_bio); @@ -712,7 +713,8 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio, } ret = btrfs_map_bio(root, READ, comp_bio, mirror_num, 0); - BUG_ON(ret); /* -ENOMEM */ + if (ret) + bio_endio(comp_bio, ret); bio_put(comp_bio); return 0; diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index cdfb4c49a80..eea5da7a2b9 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -38,8 +38,7 @@ static int balance_node_right(struct btrfs_trans_handle *trans, struct extent_buffer *dst_buf, struct extent_buffer *src_buf); static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct btrfs_path *path, int level, int slot, - int tree_mod_log); + struct btrfs_path *path, int level, int slot); static void tree_mod_log_free_eb(struct btrfs_fs_info *fs_info, struct extent_buffer *eb); struct extent_buffer *read_old_tree_block(struct btrfs_root *root, u64 bytenr, @@ -776,8 +775,7 @@ tree_mod_log_eb_move(struct btrfs_fs_info *fs_info, struct extent_buffer *dst, static noinline void tree_mod_log_set_node_key(struct btrfs_fs_info *fs_info, - struct extent_buffer *eb, - struct btrfs_disk_key *disk_key, int slot, int atomic) + struct extent_buffer *eb, int slot, int atomic) { int ret; @@ -1361,19 +1359,16 @@ noinline int btrfs_cow_block(struct btrfs_trans_handle *trans, u64 search_start; int ret; - if (trans->transaction != root->fs_info->running_transaction) { - printk(KERN_CRIT "trans %llu running %llu\n", + if (trans->transaction != root->fs_info->running_transaction) + WARN(1, KERN_CRIT "trans %llu running %llu\n", (unsigned long long)trans->transid, (unsigned long long) root->fs_info->running_transaction->transid); - WARN_ON(1); - } - if (trans->transid != root->fs_info->generation) { - printk(KERN_CRIT "trans %llu running %llu\n", + + if (trans->transid != root->fs_info->generation) + WARN(1, KERN_CRIT "trans %llu running %llu\n", (unsigned long long)trans->transid, (unsigned long long)root->fs_info->generation); - WARN_ON(1); - } if (!should_cow_block(trans, root, buf)) { *cow_ret = buf; @@ -1469,10 +1464,8 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans, if (cache_only && parent_level != 1) return 0; - if (trans->transaction != root->fs_info->running_transaction) - WARN_ON(1); - if (trans->transid != root->fs_info->generation) - WARN_ON(1); + WARN_ON(trans->transaction != root->fs_info->running_transaction); + WARN_ON(trans->transid != root->fs_info->generation); parent_nritems = btrfs_header_nritems(parent); blocksize = btrfs_level_size(root, parent_level - 1); @@ -1827,7 +1820,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, if (btrfs_header_nritems(right) == 0) { clean_tree_block(trans, root, right); btrfs_tree_unlock(right); - del_ptr(trans, root, path, level + 1, pslot + 1, 1); + del_ptr(trans, root, path, level + 1, pslot + 1); root_sub_used(root, right->len); btrfs_free_tree_block(trans, root, right, 0, 1); free_extent_buffer_stale(right); @@ -1836,7 +1829,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, struct btrfs_disk_key right_key; btrfs_node_key(right, &right_key, 0); tree_mod_log_set_node_key(root->fs_info, parent, - &right_key, pslot + 1, 0); + pslot + 1, 0); btrfs_set_node_key(parent, &right_key, pslot + 1); btrfs_mark_buffer_dirty(parent); } @@ -1871,7 +1864,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, if (btrfs_header_nritems(mid) == 0) { clean_tree_block(trans, root, mid); btrfs_tree_unlock(mid); - del_ptr(trans, root, path, level + 1, pslot, 1); + del_ptr(trans, root, path, level + 1, pslot); root_sub_used(root, mid->len); btrfs_free_tree_block(trans, root, mid, 0, 1); free_extent_buffer_stale(mid); @@ -1880,7 +1873,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, /* update the parent key to reflect our changes */ struct btrfs_disk_key mid_key; btrfs_node_key(mid, &mid_key, 0); - tree_mod_log_set_node_key(root->fs_info, parent, &mid_key, + tree_mod_log_set_node_key(root->fs_info, parent, pslot, 0); btrfs_set_node_key(parent, &mid_key, pslot); btrfs_mark_buffer_dirty(parent); @@ -1980,7 +1973,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans, orig_slot += left_nr; btrfs_node_key(mid, &disk_key, 0); tree_mod_log_set_node_key(root->fs_info, parent, - &disk_key, pslot, 0); + pslot, 0); btrfs_set_node_key(parent, &disk_key, pslot); btrfs_mark_buffer_dirty(parent); if (btrfs_header_nritems(left) > orig_slot) { @@ -2033,7 +2026,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans, btrfs_node_key(right, &disk_key, 0); tree_mod_log_set_node_key(root->fs_info, parent, - &disk_key, pslot + 1, 0); + pslot + 1, 0); btrfs_set_node_key(parent, &disk_key, pslot + 1); btrfs_mark_buffer_dirty(parent); @@ -2219,6 +2212,9 @@ static noinline void unlock_up(struct btrfs_path *path, int level, int no_skips = 0; struct extent_buffer *t; + if (path->really_keep_locks) + return; + for (i = level; i < BTRFS_MAX_LEVEL; i++) { if (!path->nodes[i]) break; @@ -2266,7 +2262,7 @@ noinline void btrfs_unlock_up_safe(struct btrfs_path *path, int level) { int i; - if (path->keep_locks) + if (path->keep_locks || path->really_keep_locks) return; for (i = level; i < BTRFS_MAX_LEVEL; i++) { @@ -2499,7 +2495,7 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root if (!cow) write_lock_level = -1; - if (cow && (p->keep_locks || p->lowest_level)) + if (cow && (p->really_keep_locks || p->keep_locks || p->lowest_level)) write_lock_level = BTRFS_MAX_LEVEL; min_write_lock_level = write_lock_level; @@ -2568,7 +2564,10 @@ again: * must have write locks on this node and the * parent */ - if (level + 1 > write_lock_level) { + if (level > write_lock_level || + (level + 1 > write_lock_level && + level + 1 < BTRFS_MAX_LEVEL && + p->nodes[level + 1])) { write_lock_level = level + 1; btrfs_release_path(p); goto again; @@ -2917,7 +2916,7 @@ static void fixup_low_keys(struct btrfs_trans_handle *trans, if (!path->nodes[i]) break; t = path->nodes[i]; - tree_mod_log_set_node_key(root->fs_info, t, key, tslot, 1); + tree_mod_log_set_node_key(root->fs_info, t, tslot, 1); btrfs_set_node_key(t, key, tslot); btrfs_mark_buffer_dirty(path->nodes[i]); if (tslot != 0) @@ -3302,14 +3301,21 @@ static noinline int split_node(struct btrfs_trans_handle *trans, */ static int leaf_space_used(struct extent_buffer *l, int start, int nr) { + struct btrfs_item *start_item; + struct btrfs_item *end_item; + struct btrfs_map_token token; int data_len; int nritems = btrfs_header_nritems(l); int end = min(nritems, start + nr) - 1; if (!nr) return 0; - data_len = btrfs_item_end_nr(l, start); - data_len = data_len - btrfs_item_offset_nr(l, end); + btrfs_init_map_token(&token); + start_item = btrfs_item_nr(l, start); + end_item = btrfs_item_nr(l, end); + data_len = btrfs_token_item_offset(l, start_item, &token) + + btrfs_token_item_size(l, start_item, &token); + data_len = data_len - btrfs_token_item_offset(l, end_item, &token); data_len += sizeof(struct btrfs_item) * nr; WARN_ON(data_len < 0); return data_len; @@ -3403,8 +3409,7 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans, if (push_items == 0) goto out_unlock; - if (!empty && push_items == left_nritems) - WARN_ON(1); + WARN_ON(!empty && push_items == left_nritems); /* push left to right */ right_nritems = btrfs_header_nritems(right); @@ -3642,11 +3647,9 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans, btrfs_set_header_nritems(left, old_left_nritems + push_items); /* fixup right node */ - if (push_items > right_nritems) { - printk(KERN_CRIT "push items %d nr %u\n", push_items, + if (push_items > right_nritems) + WARN(1, KERN_CRIT "push items %d nr %u\n", push_items, right_nritems); - WARN_ON(1); - } if (push_items < right_nritems) { push_space = btrfs_item_offset_nr(right, push_items - 1) - @@ -4602,8 +4605,7 @@ int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root * empty a node. */ static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct btrfs_path *path, int level, int slot, - int tree_mod_log) + struct btrfs_path *path, int level, int slot) { struct extent_buffer *parent = path->nodes[level]; u32 nritems; @@ -4611,7 +4613,7 @@ static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, nritems = btrfs_header_nritems(parent); if (slot != nritems - 1) { - if (tree_mod_log && level) + if (level) tree_mod_log_eb_move(root->fs_info, parent, slot, slot + 1, nritems - slot - 1); memmove_extent_buffer(parent, @@ -4619,7 +4621,7 @@ static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, btrfs_node_key_ptr_offset(slot + 1), sizeof(struct btrfs_key_ptr) * (nritems - slot - 1)); - } else if (tree_mod_log && level) { + } else if (level) { ret = tree_mod_log_insert_key(root->fs_info, parent, slot, MOD_LOG_KEY_REMOVE); BUG_ON(ret < 0); @@ -4656,7 +4658,7 @@ static noinline void btrfs_del_leaf(struct btrfs_trans_handle *trans, struct extent_buffer *leaf) { WARN_ON(btrfs_header_generation(leaf) != trans->transid); - del_ptr(trans, root, path, 1, path->slots[1], 1); + del_ptr(trans, root, path, 1, path->slots[1]); /* * btrfs_free_extent is expensive, we want to make sure we @@ -5123,13 +5125,13 @@ int btrfs_compare_trees(struct btrfs_root *left_root, right_path->search_commit_root = 1; right_path->skip_locking = 1; - spin_lock(&left_root->root_times_lock); + spin_lock(&left_root->root_item_lock); left_start_ctransid = btrfs_root_ctransid(&left_root->root_item); - spin_unlock(&left_root->root_times_lock); + spin_unlock(&left_root->root_item_lock); - spin_lock(&right_root->root_times_lock); + spin_lock(&right_root->root_item_lock); right_start_ctransid = btrfs_root_ctransid(&right_root->root_item); - spin_unlock(&right_root->root_times_lock); + spin_unlock(&right_root->root_item_lock); trans = btrfs_join_transaction(left_root); if (IS_ERR(trans)) { @@ -5224,15 +5226,15 @@ int btrfs_compare_trees(struct btrfs_root *left_root, goto out; } - spin_lock(&left_root->root_times_lock); + spin_lock(&left_root->root_item_lock); ctransid = btrfs_root_ctransid(&left_root->root_item); - spin_unlock(&left_root->root_times_lock); + spin_unlock(&left_root->root_item_lock); if (ctransid != left_start_ctransid) left_start_ctransid = 0; - spin_lock(&right_root->root_times_lock); + spin_lock(&right_root->root_item_lock); ctransid = btrfs_root_ctransid(&right_root->root_item); - spin_unlock(&right_root->root_times_lock); + spin_unlock(&right_root->root_item_lock); if (ctransid != right_start_ctransid) right_start_ctransid = 0; @@ -5496,6 +5498,139 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path) return btrfs_next_old_leaf(root, path, 0); } +/* Release the path up to but not including the given level */ +static void btrfs_release_level(struct btrfs_path *path, int level) +{ + int i; + + for (i = 0; i < level; i++) { + path->slots[i] = 0; + if (!path->nodes[i]) + continue; + if (path->locks[i]) { + btrfs_tree_unlock_rw(path->nodes[i], path->locks[i]); + path->locks[i] = 0; + } + free_extent_buffer(path->nodes[i]); + path->nodes[i] = NULL; + } +} + +/* + * This function assumes 2 things + * + * 1) You are using path->keep_locks + * 2) You are not inserting items. + * + * If either of these are not true do not use this function. If you need a next + * leaf with either of these not being true then this function can be easily + * adapted to do that, but at the moment these are the limitations. + */ +int btrfs_next_leaf_write(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + int del) +{ + struct extent_buffer *b; + struct btrfs_key key; + u32 nritems; + int level = 1; + int slot; + int ret = 1; + int write_lock_level = BTRFS_MAX_LEVEL; + int ins_len = del ? -1 : 0; + + WARN_ON(!(path->keep_locks || path->really_keep_locks)); + + nritems = btrfs_header_nritems(path->nodes[0]); + btrfs_item_key_to_cpu(path->nodes[0], &key, nritems - 1); + + while (path->nodes[level]) { + nritems = btrfs_header_nritems(path->nodes[level]); + if (!(path->locks[level] & BTRFS_WRITE_LOCK)) { +search: + btrfs_release_path(path); + ret = btrfs_search_slot(trans, root, &key, path, + ins_len, 1); + if (ret < 0) + goto out; + level = 1; + continue; + } + + if (path->slots[level] >= nritems - 1) { + level++; + continue; + } + + btrfs_release_level(path, level); + break; + } + + if (!path->nodes[level]) { + ret = 1; + goto out; + } + + path->slots[level]++; + b = path->nodes[level]; + + while (b) { + level = btrfs_header_level(b); + + if (!should_cow_block(trans, root, b)) + goto cow_done; + + btrfs_set_path_blocking(path); + ret = btrfs_cow_block(trans, root, b, + path->nodes[level + 1], + path->slots[level + 1], &b); + if (ret) + goto out; +cow_done: + path->nodes[level] = b; + btrfs_clear_path_blocking(path, NULL, 0); + if (level != 0) { + ret = setup_nodes_for_search(trans, root, path, b, + level, ins_len, + &write_lock_level); + if (ret == -EAGAIN) + goto search; + if (ret) + goto out; + + b = path->nodes[level]; + slot = path->slots[level]; + + ret = read_block_for_search(trans, root, path, + &b, level, slot, &key, 0); + if (ret == -EAGAIN) + goto search; + if (ret) + goto out; + level = btrfs_header_level(b); + if (!btrfs_try_tree_write_lock(b)) { + btrfs_set_path_blocking(path); + btrfs_tree_lock(b); + btrfs_clear_path_blocking(path, b, + BTRFS_WRITE_LOCK); + } + path->locks[level] = BTRFS_WRITE_LOCK; + path->nodes[level] = b; + path->slots[level] = 0; + } else { + path->slots[level] = 0; + ret = 0; + break; + } + } + +out: + if (ret) + btrfs_release_path(path); + + return ret; +} + int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, u64 time_seq) { diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 596617ecd32..547b7b05727 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -48,7 +48,7 @@ struct btrfs_ordered_sum; #define BTRFS_MAGIC "_BHRfS_M" -#define BTRFS_MAX_MIRRORS 2 +#define BTRFS_MAX_MIRRORS 3 #define BTRFS_MAX_LEVEL 8 @@ -142,6 +142,8 @@ struct btrfs_ordered_sum; #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 +#define BTRFS_DEV_REPLACE_DEVID 0 + /* * the max metadata block size. This limit is somewhat artificial, * but the memmove costs go through the roof for larger blocks. @@ -172,6 +174,9 @@ static int btrfs_csum_sizes[] = { 4, 0 }; /* four bytes for CRC32 */ #define BTRFS_EMPTY_DIR_SIZE 0 +/* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */ +#define REQ_GET_READ_MIRRORS (1 << 30) + #define BTRFS_FT_UNKNOWN 0 #define BTRFS_FT_REG_FILE 1 #define BTRFS_FT_DIR 2 @@ -571,6 +576,7 @@ struct btrfs_path { unsigned int skip_locking:1; unsigned int leave_spinning:1; unsigned int search_commit_root:1; + unsigned int really_keep_locks:1; }; /* @@ -885,6 +891,59 @@ struct btrfs_dev_stats_item { __le64 values[BTRFS_DEV_STAT_VALUES_MAX]; } __attribute__ ((__packed__)); +#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0 +#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1 +#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0 +#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1 +#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2 +#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3 +#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4 + +struct btrfs_dev_replace { + u64 replace_state; /* see #define above */ + u64 time_started; /* seconds since 1-Jan-1970 */ + u64 time_stopped; /* seconds since 1-Jan-1970 */ + atomic64_t num_write_errors; + atomic64_t num_uncorrectable_read_errors; + + u64 cursor_left; + u64 committed_cursor_left; + u64 cursor_left_last_write_of_item; + u64 cursor_right; + + u64 cont_reading_from_srcdev_mode; /* see #define above */ + + int is_valid; + int item_needs_writeback; + struct btrfs_device *srcdev; + struct btrfs_device *tgtdev; + + pid_t lock_owner; + atomic_t nesting_level; + struct mutex lock_finishing_cancel_unmount; + struct mutex lock_management_lock; + struct mutex lock; + + struct btrfs_scrub_progress scrub_progress; +}; + +struct btrfs_dev_replace_item { + /* + * grow this item struct at the end for future enhancements and keep + * the existing values unchanged + */ + __le64 src_devid; + __le64 cursor_left; + __le64 cursor_right; + __le64 cont_reading_from_srcdev_mode; + + __le64 replace_state; + __le64 time_started; + __le64 time_stopped; + __le64 num_write_errors; + __le64 num_uncorrectable_read_errors; +} __attribute__ ((__packed__)); + /* different types of block groups (and chunks) */ #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) @@ -1333,6 +1392,7 @@ struct btrfs_fs_info { struct btrfs_workers generic_worker; struct btrfs_workers workers; struct btrfs_workers delalloc_workers; + struct btrfs_workers flush_workers; struct btrfs_workers endio_workers; struct btrfs_workers endio_meta_workers; struct btrfs_workers endio_meta_write_workers; @@ -1429,6 +1489,8 @@ struct btrfs_fs_info { struct rw_semaphore scrub_super_lock; int scrub_workers_refcnt; struct btrfs_workers scrub_workers; + struct btrfs_workers scrub_wr_completion_workers; + struct btrfs_workers scrub_nocow_workers; #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY u32 check_integrity_print_mask; @@ -1470,6 +1532,11 @@ struct btrfs_fs_info { int backup_root_index; int num_tolerated_disk_barrier_failures; + + /* device replace state */ + struct btrfs_dev_replace dev_replace; + + atomic_t mutually_exclusive_operation_running; }; /* @@ -1579,7 +1646,7 @@ struct btrfs_root { int force_cow; - spinlock_t root_times_lock; + spinlock_t root_item_lock; }; struct btrfs_ioctl_defrag_range_args { @@ -1723,6 +1790,12 @@ struct btrfs_ioctl_defrag_range_args { #define BTRFS_DEV_STATS_KEY 249 /* + * Persistantly stores the device replace state in the device tree. + * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0). + */ +#define BTRFS_DEV_REPLACE_KEY 250 + +/* * string items are for debugging. They just store a short string of * data in the FS */ @@ -1787,7 +1860,7 @@ struct btrfs_map_token { static inline void btrfs_init_map_token (struct btrfs_map_token *token) { - memset(token, 0, sizeof(*token)); + token->kaddr = NULL; } /* some macros to generate set/get funcs for the struct fields. This @@ -2755,6 +2828,49 @@ BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, rsv_excl, 64); +/* btrfs_dev_replace_item */ +BTRFS_SETGET_FUNCS(dev_replace_src_devid, + struct btrfs_dev_replace_item, src_devid, 64); +BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, + struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, + 64); +BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, + replace_state, 64); +BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, + time_started, 64); +BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, + time_stopped, 64); +BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, + num_write_errors, 64); +BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, + struct btrfs_dev_replace_item, num_uncorrectable_read_errors, + 64); +BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, + cursor_left, 64); +BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, + cursor_right, 64); + +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, + struct btrfs_dev_replace_item, src_devid, 64); +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, + struct btrfs_dev_replace_item, + cont_reading_from_srcdev_mode, 64); +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, + struct btrfs_dev_replace_item, replace_state, 64); +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, + struct btrfs_dev_replace_item, time_started, 64); +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, + struct btrfs_dev_replace_item, time_stopped, 64); +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, + struct btrfs_dev_replace_item, num_write_errors, 64); +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, + struct btrfs_dev_replace_item, + num_uncorrectable_read_errors, 64); +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, + struct btrfs_dev_replace_item, cursor_left, 64); +BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, + struct btrfs_dev_replace_item, cursor_right, 64); + static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) { return sb->s_fs_info; @@ -2900,6 +3016,18 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); void btrfs_clear_space_info_full(struct btrfs_fs_info *info); + +enum btrfs_reserve_flush_enum { + /* If we are in the transaction, we can't flush anything.*/ + BTRFS_RESERVE_NO_FLUSH, + /* + * Flushing delalloc may cause deadlock somewhere, in this + * case, use FLUSH LIMIT + */ + BTRFS_RESERVE_FLUSH_LIMIT, + BTRFS_RESERVE_FLUSH_ALL, +}; + int btrfs_check_data_free_space(struct inode *inode, u64 bytes); void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, @@ -2919,19 +3047,13 @@ struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root, void btrfs_free_block_rsv(struct btrfs_root *root, struct btrfs_block_rsv *rsv); int btrfs_block_rsv_add(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 num_bytes); -int btrfs_block_rsv_add_noflush(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 num_bytes); + struct btrfs_block_rsv *block_rsv, u64 num_bytes, + enum btrfs_reserve_flush_enum flush); int btrfs_block_rsv_check(struct btrfs_root *root, struct btrfs_block_rsv *block_rsv, int min_factor); int btrfs_block_rsv_refill(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 min_reserved); -int btrfs_block_rsv_refill_noflush(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 min_reserved); + struct btrfs_block_rsv *block_rsv, u64 min_reserved, + enum btrfs_reserve_flush_enum flush); int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, struct btrfs_block_rsv *dst_rsv, u64 num_bytes); @@ -2955,6 +3077,7 @@ int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); int btrfs_init_space_info(struct btrfs_fs_info *fs_info); int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); +int __get_raid_index(u64 flags); /* ctree.c */ int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, int level, int *slot); @@ -3065,6 +3188,9 @@ static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, } int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); +int btrfs_next_leaf_write(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + int del); int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, u64 time_seq); static inline int btrfs_next_old_item(struct btrfs_root *root, @@ -3157,6 +3283,8 @@ void btrfs_update_root_times(struct btrfs_trans_handle *trans, struct btrfs_root *root); /* dir-item.c */ +int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, + const char *name, int name_len); int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, struct inode *dir, @@ -3256,6 +3384,7 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 objectid, u64 bytenr, int mod); +u64 btrfs_file_extent_length(struct btrfs_path *path); int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_ordered_sum *sums); @@ -3271,6 +3400,19 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans, int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, struct list_head *list, int search_commit); /* inode.c */ +struct btrfs_delalloc_work { + struct inode *inode; + int wait; + int delay_iput; + struct completion completion; + struct list_head list; + struct btrfs_work work; +}; + +struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, + int wait, int delay_iput); +void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); + struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, size_t pg_offset, u64 start, u64 len, int create); @@ -3370,9 +3512,12 @@ void btrfs_get_block_group_info(struct list_head *groups_list, struct btrfs_ioctl_space_info *space); /* file.c */ +int btrfs_auto_defrag_init(void); +void btrfs_auto_defrag_exit(void); int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, struct inode *inode); int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); +void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, int skip_pinned); @@ -3519,15 +3664,16 @@ int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, struct btrfs_pending_snapshot *pending); /* scrub.c */ -int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, - struct btrfs_scrub_progress *progress, int readonly); +int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, + u64 end, struct btrfs_scrub_progress *progress, + int readonly, int is_dev_replace); void btrfs_scrub_pause(struct btrfs_root *root); void btrfs_scrub_pause_super(struct btrfs_root *root); void btrfs_scrub_continue(struct btrfs_root *root); void btrfs_scrub_continue_super(struct btrfs_root *root); -int __btrfs_scrub_cancel(struct btrfs_fs_info *info); -int btrfs_scrub_cancel(struct btrfs_root *root); -int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev); +int btrfs_scrub_cancel(struct btrfs_fs_info *info); +int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, + struct btrfs_device *dev); int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid); int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, struct btrfs_scrub_progress *progress); diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index 478f66bdc57..34836036f01 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -651,7 +651,8 @@ static int btrfs_delayed_inode_reserve_metadata( */ if (!src_rsv || (!trans->bytes_reserved && src_rsv->type != BTRFS_BLOCK_RSV_DELALLOC)) { - ret = btrfs_block_rsv_add_noflush(root, dst_rsv, num_bytes); + ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes, + BTRFS_RESERVE_NO_FLUSH); /* * Since we're under a transaction reserve_metadata_bytes could * try to commit the transaction which will make it return @@ -686,7 +687,8 @@ static int btrfs_delayed_inode_reserve_metadata( * reserve something strictly for us. If not be a pain and try * to steal from the delalloc block rsv. */ - ret = btrfs_block_rsv_add_noflush(root, dst_rsv, num_bytes); + ret = btrfs_block_rsv_add(root, dst_rsv, num_bytes, + BTRFS_RESERVE_NO_FLUSH); if (!ret) goto out; @@ -1255,7 +1257,6 @@ static void btrfs_async_run_delayed_node_done(struct btrfs_work *work) struct btrfs_delayed_node *delayed_node = NULL; struct btrfs_root *root; struct btrfs_block_rsv *block_rsv; - unsigned long nr = 0; int need_requeue = 0; int ret; @@ -1316,11 +1317,9 @@ static void btrfs_async_run_delayed_node_done(struct btrfs_work *work) delayed_node); mutex_unlock(&delayed_node->mutex); - nr = trans->blocks_used; - trans->block_rsv = block_rsv; btrfs_end_transaction_dmeta(trans, root); - __btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty_nodelay(root); free_path: btrfs_free_path(path); out: diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c new file mode 100644 index 00000000000..66dbc8dbddf --- /dev/null +++ b/fs/btrfs/dev-replace.c @@ -0,0 +1,856 @@ +/* + * Copyright (C) STRATO AG 2012. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ +#include <linux/sched.h> +#include <linux/bio.h> +#include <linux/slab.h> +#include <linux/buffer_head.h> +#include <linux/blkdev.h> +#include <linux/random.h> +#include <linux/iocontext.h> +#include <linux/capability.h> +#include <linux/kthread.h> +#include <linux/math64.h> +#include <asm/div64.h> +#include "compat.h" +#include "ctree.h" +#include "extent_map.h" +#include "disk-io.h" +#include "transaction.h" +#include "print-tree.h" +#include "volumes.h" +#include "async-thread.h" +#include "check-integrity.h" +#include "rcu-string.h" +#include "dev-replace.h" + +static u64 btrfs_get_seconds_since_1970(void); +static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, + int scrub_ret); +static void btrfs_dev_replace_update_device_in_mapping_tree( + struct btrfs_fs_info *fs_info, + struct btrfs_device *srcdev, + struct btrfs_device *tgtdev); +static int btrfs_dev_replace_find_srcdev(struct btrfs_root *root, u64 srcdevid, + char *srcdev_name, + struct btrfs_device **device); +static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info); +static int btrfs_dev_replace_kthread(void *data); +static int btrfs_dev_replace_continue_on_mount(struct btrfs_fs_info *fs_info); + + +int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info) +{ + struct btrfs_key key; + struct btrfs_root *dev_root = fs_info->dev_root; + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + struct extent_buffer *eb; + int slot; + int ret = 0; + struct btrfs_path *path = NULL; + int item_size; + struct btrfs_dev_replace_item *ptr; + u64 src_devid; + + path = btrfs_alloc_path(); + if (!path) { + ret = -ENOMEM; + goto out; + } + + key.objectid = 0; + key.type = BTRFS_DEV_REPLACE_KEY; + key.offset = 0; + ret = btrfs_search_slot(NULL, dev_root, &key, path, 0, 0); + if (ret) { +no_valid_dev_replace_entry_found: + ret = 0; + dev_replace->replace_state = + BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED; + dev_replace->cont_reading_from_srcdev_mode = + BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS; + dev_replace->replace_state = 0; + dev_replace->time_started = 0; + dev_replace->time_stopped = 0; + atomic64_set(&dev_replace->num_write_errors, 0); + atomic64_set(&dev_replace->num_uncorrectable_read_errors, 0); + dev_replace->cursor_left = 0; + dev_replace->committed_cursor_left = 0; + dev_replace->cursor_left_last_write_of_item = 0; + dev_replace->cursor_right = 0; + dev_replace->srcdev = NULL; + dev_replace->tgtdev = NULL; + dev_replace->is_valid = 0; + dev_replace->item_needs_writeback = 0; + goto out; + } + slot = path->slots[0]; + eb = path->nodes[0]; + item_size = btrfs_item_size_nr(eb, slot); + ptr = btrfs_item_ptr(eb, slot, struct btrfs_dev_replace_item); + + if (item_size != sizeof(struct btrfs_dev_replace_item)) { + pr_warn("btrfs: dev_replace entry found has unexpected size, ignore entry\n"); + goto no_valid_dev_replace_entry_found; + } + + src_devid = btrfs_dev_replace_src_devid(eb, ptr); + dev_replace->cont_reading_from_srcdev_mode = + btrfs_dev_replace_cont_reading_from_srcdev_mode(eb, ptr); + dev_replace->replace_state = btrfs_dev_replace_replace_state(eb, ptr); + dev_replace->time_started = btrfs_dev_replace_time_started(eb, ptr); + dev_replace->time_stopped = + btrfs_dev_replace_time_stopped(eb, ptr); + atomic64_set(&dev_replace->num_write_errors, + btrfs_dev_replace_num_write_errors(eb, ptr)); + atomic64_set(&dev_replace->num_uncorrectable_read_errors, + btrfs_dev_replace_num_uncorrectable_read_errors(eb, ptr)); + dev_replace->cursor_left = btrfs_dev_replace_cursor_left(eb, ptr); + dev_replace->committed_cursor_left = dev_replace->cursor_left; + dev_replace->cursor_left_last_write_of_item = dev_replace->cursor_left; + dev_replace->cursor_right = btrfs_dev_replace_cursor_right(eb, ptr); + dev_replace->is_valid = 1; + + dev_replace->item_needs_writeback = 0; + switch (dev_replace->replace_state) { + case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: + dev_replace->srcdev = NULL; + dev_replace->tgtdev = NULL; + break; + case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED: + dev_replace->srcdev = btrfs_find_device(fs_info, src_devid, + NULL, NULL); + dev_replace->tgtdev = btrfs_find_device(fs_info, + BTRFS_DEV_REPLACE_DEVID, + NULL, NULL); + /* + * allow 'btrfs dev replace_cancel' if src/tgt device is + * missing + */ + if (!dev_replace->srcdev && + !btrfs_test_opt(dev_root, DEGRADED)) { + ret = -EIO; + pr_warn("btrfs: cannot mount because device replace operation is ongoing and\n" "srcdev (devid %llu) is missing, need to run 'btrfs dev scan'?\n", + (unsigned long long)src_devid); + } + if (!dev_replace->tgtdev && + !btrfs_test_opt(dev_root, DEGRADED)) { + ret = -EIO; + pr_warn("btrfs: cannot mount because device replace operation is ongoing and\n" "tgtdev (devid %llu) is missing, need to run btrfs dev scan?\n", + (unsigned long long)BTRFS_DEV_REPLACE_DEVID); + } + if (dev_replace->tgtdev) { + if (dev_replace->srcdev) { + dev_replace->tgtdev->total_bytes = + dev_replace->srcdev->total_bytes; + dev_replace->tgtdev->disk_total_bytes = + dev_replace->srcdev->disk_total_bytes; + dev_replace->tgtdev->bytes_used = + dev_replace->srcdev->bytes_used; + } + dev_replace->tgtdev->is_tgtdev_for_dev_replace = 1; + btrfs_init_dev_replace_tgtdev_for_resume(fs_info, + dev_replace->tgtdev); + } + break; + } + +out: + if (path) + btrfs_free_path(path); + return ret; +} + +/* + * called from commit_transaction. Writes changed device replace state to + * disk. + */ +int btrfs_run_dev_replace(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info) +{ + int ret; + struct btrfs_root *dev_root = fs_info->dev_root; + struct btrfs_path *path; + struct btrfs_key key; + struct extent_buffer *eb; + struct btrfs_dev_replace_item *ptr; + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + + btrfs_dev_replace_lock(dev_replace); + if (!dev_replace->is_valid || + !dev_replace->item_needs_writeback) { + btrfs_dev_replace_unlock(dev_replace); + return 0; + } + btrfs_dev_replace_unlock(dev_replace); + + key.objectid = 0; + key.type = BTRFS_DEV_REPLACE_KEY; + key.offset = 0; + + path = btrfs_alloc_path(); + if (!path) { + ret = -ENOMEM; + goto out; + } + ret = btrfs_search_slot(trans, dev_root, &key, path, -1, 1); + if (ret < 0) { + pr_warn("btrfs: error %d while searching for dev_replace item!\n", + ret); + goto out; + } + + if (ret == 0 && + btrfs_item_size_nr(path->nodes[0], path->slots[0]) < sizeof(*ptr)) { + /* + * need to delete old one and insert a new one. + * Since no attempt is made to recover any old state, if the + * dev_replace state is 'running', the data on the target + * drive is lost. + * It would be possible to recover the state: just make sure + * that the beginning of the item is never changed and always + * contains all the essential information. Then read this + * minimal set of information and use it as a base for the + * new state. + */ + ret = btrfs_del_item(trans, dev_root, path); + if (ret != 0) { + pr_warn("btrfs: delete too small dev_replace item failed %d!\n", + ret); + goto out; + } + ret = 1; + } + + if (ret == 1) { + /* need to insert a new item */ + btrfs_release_path(path); + ret = btrfs_insert_empty_item(trans, dev_root, path, + &key, sizeof(*ptr)); + if (ret < 0) { + pr_warn("btrfs: insert dev_replace item failed %d!\n", + ret); + goto out; + } + } + + eb = path->nodes[0]; + ptr = btrfs_item_ptr(eb, path->slots[0], + struct btrfs_dev_replace_item); + + btrfs_dev_replace_lock(dev_replace); + if (dev_replace->srcdev) + btrfs_set_dev_replace_src_devid(eb, ptr, + dev_replace->srcdev->devid); + else + btrfs_set_dev_replace_src_devid(eb, ptr, (u64)-1); + btrfs_set_dev_replace_cont_reading_from_srcdev_mode(eb, ptr, + dev_replace->cont_reading_from_srcdev_mode); + btrfs_set_dev_replace_replace_state(eb, ptr, + dev_replace->replace_state); + btrfs_set_dev_replace_time_started(eb, ptr, dev_replace->time_started); + btrfs_set_dev_replace_time_stopped(eb, ptr, dev_replace->time_stopped); + btrfs_set_dev_replace_num_write_errors(eb, ptr, + atomic64_read(&dev_replace->num_write_errors)); + btrfs_set_dev_replace_num_uncorrectable_read_errors(eb, ptr, + atomic64_read(&dev_replace->num_uncorrectable_read_errors)); + dev_replace->cursor_left_last_write_of_item = + dev_replace->cursor_left; + btrfs_set_dev_replace_cursor_left(eb, ptr, + dev_replace->cursor_left_last_write_of_item); + btrfs_set_dev_replace_cursor_right(eb, ptr, + dev_replace->cursor_right); + dev_replace->item_needs_writeback = 0; + btrfs_dev_replace_unlock(dev_replace); + + btrfs_mark_buffer_dirty(eb); + +out: + btrfs_free_path(path); + + return ret; +} + +void btrfs_after_dev_replace_commit(struct btrfs_fs_info *fs_info) +{ + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + + dev_replace->committed_cursor_left = + dev_replace->cursor_left_last_write_of_item; +} + +static u64 btrfs_get_seconds_since_1970(void) +{ + struct timespec t = CURRENT_TIME_SEC; + + return t.tv_sec; +} + +int btrfs_dev_replace_start(struct btrfs_root *root, + struct btrfs_ioctl_dev_replace_args *args) +{ + struct btrfs_trans_handle *trans; + struct btrfs_fs_info *fs_info = root->fs_info; + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + int ret; + struct btrfs_device *tgt_device = NULL; + struct btrfs_device *src_device = NULL; + + switch (args->start.cont_reading_from_srcdev_mode) { + case BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS: + case BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID: + break; + default: + return -EINVAL; + } + + if ((args->start.srcdevid == 0 && args->start.srcdev_name[0] == '\0') || + args->start.tgtdev_name[0] == '\0') + return -EINVAL; + + mutex_lock(&fs_info->volume_mutex); + ret = btrfs_init_dev_replace_tgtdev(root, args->start.tgtdev_name, + &tgt_device); + if (ret) { + pr_err("btrfs: target device %s is invalid!\n", + args->start.tgtdev_name); + mutex_unlock(&fs_info->volume_mutex); + return -EINVAL; + } + + ret = btrfs_dev_replace_find_srcdev(root, args->start.srcdevid, + args->start.srcdev_name, + &src_device); + mutex_unlock(&fs_info->volume_mutex); + if (ret) { + ret = -EINVAL; + goto leave_no_lock; + } + + if (tgt_device->total_bytes < src_device->total_bytes) { + pr_err("btrfs: target device is smaller than source device!\n"); + ret = -EINVAL; + goto leave_no_lock; + } + + btrfs_dev_replace_lock(dev_replace); + switch (dev_replace->replace_state) { + case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: + break; + case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED: + args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED; + goto leave; + } + + dev_replace->cont_reading_from_srcdev_mode = + args->start.cont_reading_from_srcdev_mode; + WARN_ON(!src_device); + dev_replace->srcdev = src_device; + WARN_ON(!tgt_device); + dev_replace->tgtdev = tgt_device; + + printk_in_rcu(KERN_INFO + "btrfs: dev_replace from %s (devid %llu) to %s) started\n", + src_device->missing ? "<missing disk>" : + rcu_str_deref(src_device->name), + src_device->devid, + rcu_str_deref(tgt_device->name)); + + tgt_device->total_bytes = src_device->total_bytes; + tgt_device->disk_total_bytes = src_device->disk_total_bytes; + tgt_device->bytes_used = src_device->bytes_used; + + /* + * from now on, the writes to the srcdev are all duplicated to + * go to the tgtdev as well (refer to btrfs_map_block()). + */ + dev_replace->replace_state = BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED; + dev_replace->time_started = btrfs_get_seconds_since_1970(); + dev_replace->cursor_left = 0; + dev_replace->committed_cursor_left = 0; + dev_replace->cursor_left_last_write_of_item = 0; + dev_replace->cursor_right = 0; + dev_replace->is_valid = 1; + dev_replace->item_needs_writeback = 1; + args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR; + btrfs_dev_replace_unlock(dev_replace); + + btrfs_wait_ordered_extents(root, 0); + + /* force writing the updated state information to disk */ + trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + btrfs_dev_replace_lock(dev_replace); + goto leave; + } + + ret = btrfs_commit_transaction(trans, root); + WARN_ON(ret); + + /* the disk copy procedure reuses the scrub code */ + ret = btrfs_scrub_dev(fs_info, src_device->devid, 0, + src_device->total_bytes, + &dev_replace->scrub_progress, 0, 1); + + ret = btrfs_dev_replace_finishing(root->fs_info, ret); + WARN_ON(ret); + + return 0; + +leave: + dev_replace->srcdev = NULL; + dev_replace->tgtdev = NULL; + btrfs_dev_replace_unlock(dev_replace); +leave_no_lock: + if (tgt_device) + btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device); + return ret; +} + +static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, + int scrub_ret) +{ + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + struct btrfs_device *tgt_device; + struct btrfs_device *src_device; + struct btrfs_root *root = fs_info->tree_root; + u8 uuid_tmp[BTRFS_UUID_SIZE]; + struct btrfs_trans_handle *trans; + int ret = 0; + + /* don't allow cancel or unmount to disturb the finishing procedure */ + mutex_lock(&dev_replace->lock_finishing_cancel_unmount); + + btrfs_dev_replace_lock(dev_replace); + /* was the operation canceled, or is it finished? */ + if (dev_replace->replace_state != + BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED) { + btrfs_dev_replace_unlock(dev_replace); + mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); + return 0; + } + + tgt_device = dev_replace->tgtdev; + src_device = dev_replace->srcdev; + btrfs_dev_replace_unlock(dev_replace); + + /* replace old device with new one in mapping tree */ + if (!scrub_ret) + btrfs_dev_replace_update_device_in_mapping_tree(fs_info, + src_device, + tgt_device); + + /* + * flush all outstanding I/O and inode extent mappings before the + * copy operation is declared as being finished + */ + btrfs_start_delalloc_inodes(root, 0); + btrfs_wait_ordered_extents(root, 0); + + trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); + return PTR_ERR(trans); + } + ret = btrfs_commit_transaction(trans, root); + WARN_ON(ret); + + /* keep away write_all_supers() during the finishing procedure */ + mutex_lock(&root->fs_info->fs_devices->device_list_mutex); + btrfs_dev_replace_lock(dev_replace); + dev_replace->replace_state = + scrub_ret ? BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED + : BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED; + dev_replace->tgtdev = NULL; + dev_replace->srcdev = NULL; + dev_replace->time_stopped = btrfs_get_seconds_since_1970(); + dev_replace->item_needs_writeback = 1; + + if (scrub_ret) { + printk_in_rcu(KERN_ERR + "btrfs: btrfs_scrub_dev(%s, %llu, %s) failed %d\n", + src_device->missing ? "<missing disk>" : + rcu_str_deref(src_device->name), + src_device->devid, + rcu_str_deref(tgt_device->name), scrub_ret); + btrfs_dev_replace_unlock(dev_replace); + mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); + if (tgt_device) + btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device); + mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); + + return 0; + } + + printk_in_rcu(KERN_INFO + "btrfs: dev_replace from %s (devid %llu) to %s) finished\n", + src_device->missing ? "<missing disk>" : + rcu_str_deref(src_device->name), + src_device->devid, + rcu_str_deref(tgt_device->name)); + tgt_device->is_tgtdev_for_dev_replace = 0; + tgt_device->devid = src_device->devid; + src_device->devid = BTRFS_DEV_REPLACE_DEVID; + tgt_device->bytes_used = src_device->bytes_used; + memcpy(uuid_tmp, tgt_device->uuid, sizeof(uuid_tmp)); + memcpy(tgt_device->uuid, src_device->uuid, sizeof(tgt_device->uuid)); + memcpy(src_device->uuid, uuid_tmp, sizeof(src_device->uuid)); + tgt_device->total_bytes = src_device->total_bytes; + tgt_device->disk_total_bytes = src_device->disk_total_bytes; + tgt_device->bytes_used = src_device->bytes_used; + if (fs_info->sb->s_bdev == src_device->bdev) + fs_info->sb->s_bdev = tgt_device->bdev; + if (fs_info->fs_devices->latest_bdev == src_device->bdev) + fs_info->fs_devices->latest_bdev = tgt_device->bdev; + list_add(&tgt_device->dev_alloc_list, &fs_info->fs_devices->alloc_list); + + btrfs_rm_dev_replace_srcdev(fs_info, src_device); + if (src_device->bdev) { + /* zero out the old super */ + btrfs_scratch_superblock(src_device); + } + /* + * this is again a consistent state where no dev_replace procedure + * is running, the target device is part of the filesystem, the + * source device is not part of the filesystem anymore and its 1st + * superblock is scratched out so that it is no longer marked to + * belong to this filesystem. + */ + btrfs_dev_replace_unlock(dev_replace); + mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); + + /* write back the superblocks */ + trans = btrfs_start_transaction(root, 0); + if (!IS_ERR(trans)) + btrfs_commit_transaction(trans, root); + + mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); + + return 0; +} + +static void btrfs_dev_replace_update_device_in_mapping_tree( + struct btrfs_fs_info *fs_info, + struct btrfs_device *srcdev, + struct btrfs_device *tgtdev) +{ + struct extent_map_tree *em_tree = &fs_info->mapping_tree.map_tree; + struct extent_map *em; + struct map_lookup *map; + u64 start = 0; + int i; + + write_lock(&em_tree->lock); + do { + em = lookup_extent_mapping(em_tree, start, (u64)-1); + if (!em) + break; + map = (struct map_lookup *)em->bdev; + for (i = 0; i < map->num_stripes; i++) + if (srcdev == map->stripes[i].dev) + map->stripes[i].dev = tgtdev; + start = em->start + em->len; + free_extent_map(em); + } while (start); + write_unlock(&em_tree->lock); +} + +static int btrfs_dev_replace_find_srcdev(struct btrfs_root *root, u64 srcdevid, + char *srcdev_name, + struct btrfs_device **device) +{ + int ret; + + if (srcdevid) { + ret = 0; + *device = btrfs_find_device(root->fs_info, srcdevid, NULL, + NULL); + if (!*device) + ret = -ENOENT; + } else { + ret = btrfs_find_device_missing_or_by_path(root, srcdev_name, + device); + } + return ret; +} + +void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info, + struct btrfs_ioctl_dev_replace_args *args) +{ + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + + btrfs_dev_replace_lock(dev_replace); + /* even if !dev_replace_is_valid, the values are good enough for + * the replace_status ioctl */ + args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR; + args->status.replace_state = dev_replace->replace_state; + args->status.time_started = dev_replace->time_started; + args->status.time_stopped = dev_replace->time_stopped; + args->status.num_write_errors = + atomic64_read(&dev_replace->num_write_errors); + args->status.num_uncorrectable_read_errors = + atomic64_read(&dev_replace->num_uncorrectable_read_errors); + switch (dev_replace->replace_state) { + case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: + args->status.progress_1000 = 0; + break; + case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: + args->status.progress_1000 = 1000; + break; + case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED: + args->status.progress_1000 = div64_u64(dev_replace->cursor_left, + div64_u64(dev_replace->srcdev->total_bytes, 1000)); + break; + } + btrfs_dev_replace_unlock(dev_replace); +} + +int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info, + struct btrfs_ioctl_dev_replace_args *args) +{ + args->result = __btrfs_dev_replace_cancel(fs_info); + return 0; +} + +static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info) +{ + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + struct btrfs_device *tgt_device = NULL; + struct btrfs_trans_handle *trans; + struct btrfs_root *root = fs_info->tree_root; + u64 result; + int ret; + + mutex_lock(&dev_replace->lock_finishing_cancel_unmount); + btrfs_dev_replace_lock(dev_replace); + switch (dev_replace->replace_state) { + case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: + result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED; + btrfs_dev_replace_unlock(dev_replace); + goto leave; + case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED: + result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR; + tgt_device = dev_replace->tgtdev; + dev_replace->tgtdev = NULL; + dev_replace->srcdev = NULL; + break; + } + dev_replace->replace_state = BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED; + dev_replace->time_stopped = btrfs_get_seconds_since_1970(); + dev_replace->item_needs_writeback = 1; + btrfs_dev_replace_unlock(dev_replace); + btrfs_scrub_cancel(fs_info); + + trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); + return PTR_ERR(trans); + } + ret = btrfs_commit_transaction(trans, root); + WARN_ON(ret); + if (tgt_device) + btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device); + +leave: + mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); + return result; +} + +void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info) +{ + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + + mutex_lock(&dev_replace->lock_finishing_cancel_unmount); + btrfs_dev_replace_lock(dev_replace); + switch (dev_replace->replace_state) { + case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED: + break; + case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: + dev_replace->replace_state = + BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED; + dev_replace->time_stopped = btrfs_get_seconds_since_1970(); + dev_replace->item_needs_writeback = 1; + pr_info("btrfs: suspending dev_replace for unmount\n"); + break; + } + + btrfs_dev_replace_unlock(dev_replace); + mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); +} + +/* resume dev_replace procedure that was interrupted by unmount */ +int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info) +{ + struct task_struct *task; + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + + btrfs_dev_replace_lock(dev_replace); + switch (dev_replace->replace_state) { + case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: + btrfs_dev_replace_unlock(dev_replace); + return 0; + case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: + break; + case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED: + dev_replace->replace_state = + BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED; + break; + } + if (!dev_replace->tgtdev || !dev_replace->tgtdev->bdev) { + pr_info("btrfs: cannot continue dev_replace, tgtdev is missing\n" + "btrfs: you may cancel the operation after 'mount -o degraded'\n"); + btrfs_dev_replace_unlock(dev_replace); + return 0; + } + btrfs_dev_replace_unlock(dev_replace); + + WARN_ON(atomic_xchg( + &fs_info->mutually_exclusive_operation_running, 1)); + task = kthread_run(btrfs_dev_replace_kthread, fs_info, "btrfs-devrepl"); + return PTR_RET(task); +} + +static int btrfs_dev_replace_kthread(void *data) +{ + struct btrfs_fs_info *fs_info = data; + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + struct btrfs_ioctl_dev_replace_args *status_args; + u64 progress; + + status_args = kzalloc(sizeof(*status_args), GFP_NOFS); + if (status_args) { + btrfs_dev_replace_status(fs_info, status_args); + progress = status_args->status.progress_1000; + kfree(status_args); + do_div(progress, 10); + printk_in_rcu(KERN_INFO + "btrfs: continuing dev_replace from %s (devid %llu) to %s @%u%%\n", + dev_replace->srcdev->missing ? "<missing disk>" : + rcu_str_deref(dev_replace->srcdev->name), + dev_replace->srcdev->devid, + dev_replace->tgtdev ? + rcu_str_deref(dev_replace->tgtdev->name) : + "<missing target disk>", + (unsigned int)progress); + } + btrfs_dev_replace_continue_on_mount(fs_info); + atomic_set(&fs_info->mutually_exclusive_operation_running, 0); + + return 0; +} + +static int btrfs_dev_replace_continue_on_mount(struct btrfs_fs_info *fs_info) +{ + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + int ret; + + ret = btrfs_scrub_dev(fs_info, dev_replace->srcdev->devid, + dev_replace->committed_cursor_left, + dev_replace->srcdev->total_bytes, + &dev_replace->scrub_progress, 0, 1); + ret = btrfs_dev_replace_finishing(fs_info, ret); + WARN_ON(ret); + return 0; +} + +int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace) +{ + if (!dev_replace->is_valid) + return 0; + + switch (dev_replace->replace_state) { + case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: + return 0; + case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: + case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED: + /* + * return true even if tgtdev is missing (this is + * something that can happen if the dev_replace + * procedure is suspended by an umount and then + * the tgtdev is missing (or "btrfs dev scan") was + * not called and the the filesystem is remounted + * in degraded state. This does not stop the + * dev_replace procedure. It needs to be canceled + * manually if the cancelation is wanted. + */ + break; + } + return 1; +} + +void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace) +{ + /* the beginning is just an optimization for the typical case */ + if (atomic_read(&dev_replace->nesting_level) == 0) { +acquire_lock: + /* this is not a nested case where the same thread + * is trying to acqurire the same lock twice */ + mutex_lock(&dev_replace->lock); + mutex_lock(&dev_replace->lock_management_lock); + dev_replace->lock_owner = current->pid; + atomic_inc(&dev_replace->nesting_level); + mutex_unlock(&dev_replace->lock_management_lock); + return; + } + + mutex_lock(&dev_replace->lock_management_lock); + if (atomic_read(&dev_replace->nesting_level) > 0 && + dev_replace->lock_owner == current->pid) { + WARN_ON(!mutex_is_locked(&dev_replace->lock)); + atomic_inc(&dev_replace->nesting_level); + mutex_unlock(&dev_replace->lock_management_lock); + return; + } + + mutex_unlock(&dev_replace->lock_management_lock); + goto acquire_lock; +} + +void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace) +{ + WARN_ON(!mutex_is_locked(&dev_replace->lock)); + mutex_lock(&dev_replace->lock_management_lock); + WARN_ON(atomic_read(&dev_replace->nesting_level) < 1); + WARN_ON(dev_replace->lock_owner != current->pid); + atomic_dec(&dev_replace->nesting_level); + if (atomic_read(&dev_replace->nesting_level) == 0) { + dev_replace->lock_owner = 0; + mutex_unlock(&dev_replace->lock_management_lock); + mutex_unlock(&dev_replace->lock); + } else { + mutex_unlock(&dev_replace->lock_management_lock); + } +} diff --git a/fs/btrfs/dev-replace.h b/fs/btrfs/dev-replace.h new file mode 100644 index 00000000000..20035cbbf02 --- /dev/null +++ b/fs/btrfs/dev-replace.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) STRATO AG 2012. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#if !defined(__BTRFS_DEV_REPLACE__) +#define __BTRFS_DEV_REPLACE__ + +struct btrfs_ioctl_dev_replace_args; + +int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info); +int btrfs_run_dev_replace(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info); +void btrfs_after_dev_replace_commit(struct btrfs_fs_info *fs_info); +int btrfs_dev_replace_start(struct btrfs_root *root, + struct btrfs_ioctl_dev_replace_args *args); +void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info, + struct btrfs_ioctl_dev_replace_args *args); +int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info, + struct btrfs_ioctl_dev_replace_args *args); +void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info); +int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info); +int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace); +void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace); +void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace); + +static inline void btrfs_dev_replace_stats_inc(atomic64_t *stat_value) +{ + atomic64_inc(stat_value); +} +#endif diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c index c1a074d0696..502c2158167 100644 --- a/fs/btrfs/dir-item.c +++ b/fs/btrfs/dir-item.c @@ -213,6 +213,65 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, return btrfs_match_dir_item_name(root, path, name, name_len); } +int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, + const char *name, int name_len) +{ + int ret; + struct btrfs_key key; + struct btrfs_dir_item *di; + int data_size; + struct extent_buffer *leaf; + int slot; + struct btrfs_path *path; + + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + + key.objectid = dir; + btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); + key.offset = btrfs_name_hash(name, name_len); + + ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); + + /* return back any errors */ + if (ret < 0) + goto out; + + /* nothing found, we're safe */ + if (ret > 0) { + ret = 0; + goto out; + } + + /* we found an item, look for our name in the item */ + di = btrfs_match_dir_item_name(root, path, name, name_len); + if (di) { + /* our exact name was found */ + ret = -EEXIST; + goto out; + } + + /* + * see if there is room in the item to insert this + * name + */ + data_size = sizeof(*di) + name_len + sizeof(struct btrfs_item); + leaf = path->nodes[0]; + slot = path->slots[0]; + if (data_size + btrfs_item_size_nr(leaf, slot) + + sizeof(struct btrfs_item) > BTRFS_LEAF_DATA_SIZE(root)) { + ret = -EOVERFLOW; + } else { + /* plenty of insertion room */ + ret = 0; + } +out: + btrfs_free_path(path); + return ret; +} + /* * lookup a directory item based on index. 'dir' is the objectid * we're searching in, and 'mod' tells us if you plan on deleting the diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 7cda51995c1..a8f652dc940 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -45,6 +45,7 @@ #include "inode-map.h" #include "check-integrity.h" #include "rcu-string.h" +#include "dev-replace.h" #ifdef CONFIG_X86 #include <asm/cpufeature.h> @@ -387,7 +388,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root, if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags)) break; - num_copies = btrfs_num_copies(&root->fs_info->mapping_tree, + num_copies = btrfs_num_copies(root->fs_info, eb->start, eb->len); if (num_copies == 1) break; @@ -852,11 +853,16 @@ static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio, int mirror_num, unsigned long bio_flags, u64 bio_offset) { + int ret; + /* * when we're called for a write, we're already in the async * submission context. Just jump into btrfs_map_bio */ - return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); + ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1); + if (ret) + bio_endio(bio, ret); + return ret; } static int check_async_write(struct inode *inode, unsigned long bio_flags) @@ -878,7 +884,6 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, int ret; if (!(rw & REQ_WRITE)) { - /* * called for a read, do the setup so that checksum validation * can happen in the async kernel threads @@ -886,26 +891,32 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info, bio, 1); if (ret) - return ret; - return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, - mirror_num, 0); + goto out_w_error; + ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, + mirror_num, 0); } else if (!async) { ret = btree_csum_one_bio(bio); if (ret) - return ret; - return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, - mirror_num, 0); + goto out_w_error; + ret = btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, + mirror_num, 0); + } else { + /* + * kthread helpers are used to submit writes so that + * checksumming can happen in parallel across all CPUs + */ + ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, + inode, rw, bio, mirror_num, 0, + bio_offset, + __btree_submit_bio_start, + __btree_submit_bio_done); } - /* - * kthread helpers are used to submit writes so that checksumming - * can happen in parallel across all CPUs - */ - return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, - inode, rw, bio, mirror_num, 0, - bio_offset, - __btree_submit_bio_start, - __btree_submit_bio_done); + if (ret) { +out_w_error: + bio_endio(bio, ret); + } + return ret; } #ifdef CONFIG_MIGRATION @@ -990,6 +1001,7 @@ static void btree_invalidatepage(struct page *page, unsigned long offset) static int btree_set_page_dirty(struct page *page) { +#ifdef DEBUG struct extent_buffer *eb; BUG_ON(!PagePrivate(page)); @@ -998,6 +1010,7 @@ static int btree_set_page_dirty(struct page *page) BUG_ON(!test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)); BUG_ON(!atomic_read(&eb->refs)); btrfs_assert_tree_locked(eb); +#endif return __set_page_dirty_nobuffers(page); } @@ -1129,11 +1142,11 @@ void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, root->fs_info->dirty_metadata_bytes); } spin_unlock(&root->fs_info->delalloc_lock); - } - /* ugh, clear_extent_buffer_dirty needs to lock the page */ - btrfs_set_lock_blocking(buf); - clear_extent_buffer_dirty(buf); + /* ugh, clear_extent_buffer_dirty needs to lock the page */ + btrfs_set_lock_blocking(buf); + clear_extent_buffer_dirty(buf); + } } } @@ -1193,7 +1206,7 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize, root->root_key.objectid = objectid; root->anon_dev = 0; - spin_lock_init(&root->root_times_lock); + spin_lock_init(&root->root_item_lock); } static int __must_check find_and_setup_root(struct btrfs_root *tree_root, @@ -2131,6 +2144,11 @@ int open_ctree(struct super_block *sb, init_rwsem(&fs_info->extent_commit_sem); init_rwsem(&fs_info->cleanup_work_sem); init_rwsem(&fs_info->subvol_sem); + fs_info->dev_replace.lock_owner = 0; + atomic_set(&fs_info->dev_replace.nesting_level, 0); + mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); + mutex_init(&fs_info->dev_replace.lock_management_lock); + mutex_init(&fs_info->dev_replace.lock); spin_lock_init(&fs_info->qgroup_lock); fs_info->qgroup_tree = RB_ROOT; @@ -2279,6 +2297,10 @@ int open_ctree(struct super_block *sb, fs_info->thread_pool_size, &fs_info->generic_worker); + btrfs_init_workers(&fs_info->flush_workers, "flush_delalloc", + fs_info->thread_pool_size, + &fs_info->generic_worker); + btrfs_init_workers(&fs_info->submit_workers, "submit", min_t(u64, fs_devices->num_devices, fs_info->thread_pool_size), @@ -2350,6 +2372,7 @@ int open_ctree(struct super_block *sb, ret |= btrfs_start_workers(&fs_info->delayed_workers); ret |= btrfs_start_workers(&fs_info->caching_workers); ret |= btrfs_start_workers(&fs_info->readahead_workers); + ret |= btrfs_start_workers(&fs_info->flush_workers); if (ret) { err = -ENOMEM; goto fail_sb_buffer; @@ -2418,7 +2441,11 @@ int open_ctree(struct super_block *sb, goto fail_tree_roots; } - btrfs_close_extra_devices(fs_devices); + /* + * keep the device that is marked to be the target device for the + * dev_replace procedure + */ + btrfs_close_extra_devices(fs_info, fs_devices, 0); if (!fs_devices->latest_bdev) { printk(KERN_CRIT "btrfs: failed to read devices on %s\n", @@ -2490,6 +2517,14 @@ retry_root_backup: goto fail_block_groups; } + ret = btrfs_init_dev_replace(fs_info); + if (ret) { + pr_err("btrfs: failed to init dev_replace: %d\n", ret); + goto fail_block_groups; + } + + btrfs_close_extra_devices(fs_info, fs_devices, 1); + ret = btrfs_init_space_info(fs_info); if (ret) { printk(KERN_ERR "Failed to initial space info: %d\n", ret); @@ -2503,6 +2538,13 @@ retry_root_backup: } fs_info->num_tolerated_disk_barrier_failures = btrfs_calc_num_tolerated_disk_barrier_failures(fs_info); + if (fs_info->fs_devices->missing_devices > + fs_info->num_tolerated_disk_barrier_failures && + !(sb->s_flags & MS_RDONLY)) { + printk(KERN_WARNING + "Btrfs: too many missing devices, writeable mount is not allowed\n"); + goto fail_block_groups; + } fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, "btrfs-cleaner"); @@ -2631,6 +2673,13 @@ retry_root_backup: return ret; } + ret = btrfs_resume_dev_replace_async(fs_info); + if (ret) { + pr_warn("btrfs: failed to resume dev_replace\n"); + close_ctree(tree_root); + return ret; + } + return 0; fail_qgroup: @@ -2667,6 +2716,7 @@ fail_sb_buffer: btrfs_stop_workers(&fs_info->submit_workers); btrfs_stop_workers(&fs_info->delayed_workers); btrfs_stop_workers(&fs_info->caching_workers); + btrfs_stop_workers(&fs_info->flush_workers); fail_alloc: fail_iput: btrfs_mapping_tree_free(&fs_info->mapping_tree); @@ -3270,16 +3320,18 @@ int close_ctree(struct btrfs_root *root) smp_mb(); /* pause restriper - we want to resume on mount */ - btrfs_pause_balance(root->fs_info); + btrfs_pause_balance(fs_info); + + btrfs_dev_replace_suspend_for_unmount(fs_info); - btrfs_scrub_cancel(root); + btrfs_scrub_cancel(fs_info); /* wait for any defraggers to finish */ wait_event(fs_info->transaction_wait, (atomic_read(&fs_info->defrag_running) == 0)); /* clear out the rbtree of defraggable inodes */ - btrfs_run_defrag_inodes(fs_info); + btrfs_cleanup_defrag_inodes(fs_info); if (!(fs_info->sb->s_flags & MS_RDONLY)) { ret = btrfs_commit_super(root); @@ -3339,6 +3391,7 @@ int close_ctree(struct btrfs_root *root) btrfs_stop_workers(&fs_info->delayed_workers); btrfs_stop_workers(&fs_info->caching_workers); btrfs_stop_workers(&fs_info->readahead_workers); + btrfs_stop_workers(&fs_info->flush_workers); #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY if (btrfs_test_opt(root, CHECK_INTEGRITY)) @@ -3383,14 +3436,12 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf) int was_dirty; btrfs_assert_tree_locked(buf); - if (transid != root->fs_info->generation) { - printk(KERN_CRIT "btrfs transid mismatch buffer %llu, " + if (transid != root->fs_info->generation) + WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, " "found %llu running %llu\n", (unsigned long long)buf->start, (unsigned long long)transid, (unsigned long long)root->fs_info->generation); - WARN_ON(1); - } was_dirty = set_extent_buffer_dirty(buf); if (!was_dirty) { spin_lock(&root->fs_info->delalloc_lock); @@ -3399,7 +3450,8 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf) } } -void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) +static void __btrfs_btree_balance_dirty(struct btrfs_root *root, + int flush_delayed) { /* * looks as though older kernels can get into trouble with @@ -3411,36 +3463,26 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) if (current->flags & PF_MEMALLOC) return; - btrfs_balance_delayed_items(root); + if (flush_delayed) + btrfs_balance_delayed_items(root); num_dirty = root->fs_info->dirty_metadata_bytes; if (num_dirty > thresh) { - balance_dirty_pages_ratelimited_nr( - root->fs_info->btree_inode->i_mapping, 1); + balance_dirty_pages_ratelimited( + root->fs_info->btree_inode->i_mapping); } return; } -void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) +void btrfs_btree_balance_dirty(struct btrfs_root *root) { - /* - * looks as though older kernels can get into trouble with - * this code, they end up stuck in balance_dirty_pages forever - */ - u64 num_dirty; - unsigned long thresh = 32 * 1024 * 1024; - - if (current->flags & PF_MEMALLOC) - return; - - num_dirty = root->fs_info->dirty_metadata_bytes; + __btrfs_btree_balance_dirty(root, 1); +} - if (num_dirty > thresh) { - balance_dirty_pages_ratelimited_nr( - root->fs_info->btree_inode->i_mapping, 1); - } - return; +void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root) +{ + __btrfs_btree_balance_dirty(root, 0); } int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid) diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index 2025a9132c1..305c33efb0e 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -62,8 +62,8 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, struct btrfs_key *location); int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); -void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); -void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); +void btrfs_btree_balance_dirty(struct btrfs_root *root); +void btrfs_btree_balance_dirty_nodelay(struct btrfs_root *root); void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); void btrfs_mark_buffer_dirty(struct extent_buffer *buf); int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 604befdcc35..c61ebb63056 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -33,6 +33,7 @@ #include "volumes.h" #include "locking.h" #include "free-space-cache.h" +#include "math.h" #undef SCRAMBLE_DELAYED_REFS @@ -649,24 +650,6 @@ void btrfs_clear_space_info_full(struct btrfs_fs_info *info) rcu_read_unlock(); } -static u64 div_factor(u64 num, int factor) -{ - if (factor == 10) - return num; - num *= factor; - do_div(num, 10); - return num; -} - -static u64 div_factor_fine(u64 num, int factor) -{ - if (factor == 100) - return num; - num *= factor; - do_div(num, 100); - return num; -} - u64 btrfs_find_block_group(struct btrfs_root *root, u64 search_start, u64 search_hint, int owner) { @@ -1835,7 +1818,7 @@ static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, /* Tell the block device(s) that the sectors can be discarded */ - ret = btrfs_map_block(&root->fs_info->mapping_tree, REQ_DISCARD, + ret = btrfs_map_block(root->fs_info, REQ_DISCARD, bytenr, &num_bytes, &bbio, 0); /* Error condition is -ENOMEM */ if (!ret) { @@ -2314,6 +2297,9 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, kfree(extent_op); if (ret) { + list_del_init(&locked_ref->cluster); + mutex_unlock(&locked_ref->mutex); + printk(KERN_DEBUG "btrfs: run_delayed_extent_op returned %d\n", ret); spin_lock(&delayed_refs->lock); return ret; @@ -2356,6 +2342,10 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans, count++; if (ret) { + if (locked_ref) { + list_del_init(&locked_ref->cluster); + mutex_unlock(&locked_ref->mutex); + } printk(KERN_DEBUG "btrfs: run_one_delayed_ref returned %d\n", ret); spin_lock(&delayed_refs->lock); return ret; @@ -3661,7 +3651,7 @@ out: static int can_overcommit(struct btrfs_root *root, struct btrfs_space_info *space_info, u64 bytes, - int flush) + enum btrfs_reserve_flush_enum flush) { u64 profile = btrfs_get_alloc_profile(root, 0); u64 avail; @@ -3685,11 +3675,11 @@ static int can_overcommit(struct btrfs_root *root, avail >>= 1; /* - * If we aren't flushing don't let us overcommit too much, say - * 1/8th of the space. If we can flush, let it overcommit up to - * 1/2 of the space. + * If we aren't flushing all things, let us overcommit up to + * 1/2th of the space. If we can flush, don't let us overcommit + * too much, let it overcommit up to 1/8 of the space. */ - if (flush) + if (flush == BTRFS_RESERVE_FLUSH_ALL) avail >>= 3; else avail >>= 1; @@ -3699,6 +3689,20 @@ static int can_overcommit(struct btrfs_root *root, return 0; } +static int writeback_inodes_sb_nr_if_idle_safe(struct super_block *sb, + unsigned long nr_pages, + enum wb_reason reason) +{ + if (!writeback_in_progress(sb->s_bdi) && + down_read_trylock(&sb->s_umount)) { + writeback_inodes_sb_nr(sb, nr_pages, reason); + up_read(&sb->s_umount); + return 1; + } + + return 0; +} + /* * shrink metadata reservation for delalloc */ @@ -3713,6 +3717,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, long time_left; unsigned long nr_pages = (2 * 1024 * 1024) >> PAGE_CACHE_SHIFT; int loops = 0; + enum btrfs_reserve_flush_enum flush; trans = (struct btrfs_trans_handle *)current->journal_info; block_rsv = &root->fs_info->delalloc_block_rsv; @@ -3730,8 +3735,9 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, while (delalloc_bytes && loops < 3) { max_reclaim = min(delalloc_bytes, to_reclaim); nr_pages = max_reclaim >> PAGE_CACHE_SHIFT; - writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages, - WB_REASON_FS_FREE_SPACE); + writeback_inodes_sb_nr_if_idle_safe(root->fs_info->sb, + nr_pages, + WB_REASON_FS_FREE_SPACE); /* * We need to wait for the async pages to actually start before @@ -3740,8 +3746,12 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, wait_event(root->fs_info->async_submit_wait, !atomic_read(&root->fs_info->async_delalloc_pages)); + if (!trans) + flush = BTRFS_RESERVE_FLUSH_ALL; + else + flush = BTRFS_RESERVE_NO_FLUSH; spin_lock(&space_info->lock); - if (can_overcommit(root, space_info, orig, !trans)) { + if (can_overcommit(root, space_info, orig, flush)) { spin_unlock(&space_info->lock); break; } @@ -3899,7 +3909,8 @@ static int flush_space(struct btrfs_root *root, */ static int reserve_metadata_bytes(struct btrfs_root *root, struct btrfs_block_rsv *block_rsv, - u64 orig_bytes, int flush) + u64 orig_bytes, + enum btrfs_reserve_flush_enum flush) { struct btrfs_space_info *space_info = block_rsv->space_info; u64 used; @@ -3912,10 +3923,11 @@ again: ret = 0; spin_lock(&space_info->lock); /* - * We only want to wait if somebody other than us is flushing and we are - * actually alloed to flush. + * We only want to wait if somebody other than us is flushing and we + * are actually allowed to flush all things. */ - while (flush && !flushing && space_info->flush) { + while (flush == BTRFS_RESERVE_FLUSH_ALL && !flushing && + space_info->flush) { spin_unlock(&space_info->lock); /* * If we have a trans handle we can't wait because the flusher @@ -3981,23 +3993,40 @@ again: * Couldn't make our reservation, save our place so while we're trying * to reclaim space we can actually use it instead of somebody else * stealing it from us. + * + * We make the other tasks wait for the flush only when we can flush + * all things. */ - if (ret && flush) { + if (ret && flush != BTRFS_RESERVE_NO_FLUSH) { flushing = true; space_info->flush = 1; } spin_unlock(&space_info->lock); - if (!ret || !flush) + if (!ret || flush == BTRFS_RESERVE_NO_FLUSH) goto out; ret = flush_space(root, space_info, num_bytes, orig_bytes, flush_state); flush_state++; + + /* + * If we are FLUSH_LIMIT, we can not flush delalloc, or the deadlock + * would happen. So skip delalloc flush. + */ + if (flush == BTRFS_RESERVE_FLUSH_LIMIT && + (flush_state == FLUSH_DELALLOC || + flush_state == FLUSH_DELALLOC_WAIT)) + flush_state = ALLOC_CHUNK; + if (!ret) goto again; - else if (flush_state <= COMMIT_TRANS) + else if (flush == BTRFS_RESERVE_FLUSH_LIMIT && + flush_state < COMMIT_TRANS) + goto again; + else if (flush == BTRFS_RESERVE_FLUSH_ALL && + flush_state <= COMMIT_TRANS) goto again; out: @@ -4148,9 +4177,9 @@ void btrfs_free_block_rsv(struct btrfs_root *root, kfree(rsv); } -static inline int __block_rsv_add(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 num_bytes, int flush) +int btrfs_block_rsv_add(struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, u64 num_bytes, + enum btrfs_reserve_flush_enum flush) { int ret; @@ -4166,20 +4195,6 @@ static inline int __block_rsv_add(struct btrfs_root *root, return ret; } -int btrfs_block_rsv_add(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 num_bytes) -{ - return __block_rsv_add(root, block_rsv, num_bytes, 1); -} - -int btrfs_block_rsv_add_noflush(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 num_bytes) -{ - return __block_rsv_add(root, block_rsv, num_bytes, 0); -} - int btrfs_block_rsv_check(struct btrfs_root *root, struct btrfs_block_rsv *block_rsv, int min_factor) { @@ -4198,9 +4213,9 @@ int btrfs_block_rsv_check(struct btrfs_root *root, return ret; } -static inline int __btrfs_block_rsv_refill(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 min_reserved, int flush) +int btrfs_block_rsv_refill(struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, u64 min_reserved, + enum btrfs_reserve_flush_enum flush) { u64 num_bytes = 0; int ret = -ENOSPC; @@ -4228,20 +4243,6 @@ static inline int __btrfs_block_rsv_refill(struct btrfs_root *root, return ret; } -int btrfs_block_rsv_refill(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 min_reserved) -{ - return __btrfs_block_rsv_refill(root, block_rsv, min_reserved, 1); -} - -int btrfs_block_rsv_refill_noflush(struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 min_reserved) -{ - return __btrfs_block_rsv_refill(root, block_rsv, min_reserved, 0); -} - int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, struct btrfs_block_rsv *dst_rsv, u64 num_bytes) @@ -4532,17 +4533,27 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) u64 csum_bytes; unsigned nr_extents = 0; int extra_reserve = 0; - int flush = 1; + enum btrfs_reserve_flush_enum flush = BTRFS_RESERVE_FLUSH_ALL; int ret; + bool delalloc_lock = true; - /* Need to be holding the i_mutex here if we aren't free space cache */ - if (btrfs_is_free_space_inode(inode)) - flush = 0; + /* If we are a free space inode we need to not flush since we will be in + * the middle of a transaction commit. We also don't need the delalloc + * mutex since we won't race with anybody. We need this mostly to make + * lockdep shut its filthy mouth. + */ + if (btrfs_is_free_space_inode(inode)) { + flush = BTRFS_RESERVE_NO_FLUSH; + delalloc_lock = false; + } - if (flush && btrfs_transaction_in_commit(root->fs_info)) + if (flush != BTRFS_RESERVE_NO_FLUSH && + btrfs_transaction_in_commit(root->fs_info)) schedule_timeout(1); - mutex_lock(&BTRFS_I(inode)->delalloc_mutex); + if (delalloc_lock) + mutex_lock(&BTRFS_I(inode)->delalloc_mutex); + num_bytes = ALIGN(num_bytes, root->sectorsize); spin_lock(&BTRFS_I(inode)->lock); @@ -4572,7 +4583,11 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) ret = btrfs_qgroup_reserve(root, num_bytes + nr_extents * root->leafsize); if (ret) { - mutex_unlock(&BTRFS_I(inode)->delalloc_mutex); + spin_lock(&BTRFS_I(inode)->lock); + calc_csum_metadata_size(inode, num_bytes, 0); + spin_unlock(&BTRFS_I(inode)->lock); + if (delalloc_lock) + mutex_unlock(&BTRFS_I(inode)->delalloc_mutex); return ret; } } @@ -4607,7 +4622,12 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) btrfs_ino(inode), to_free, 0); } - mutex_unlock(&BTRFS_I(inode)->delalloc_mutex); + if (root->fs_info->quota_enabled) { + btrfs_qgroup_free(root, num_bytes + + nr_extents * root->leafsize); + } + if (delalloc_lock) + mutex_unlock(&BTRFS_I(inode)->delalloc_mutex); return ret; } @@ -4619,7 +4639,9 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) } BTRFS_I(inode)->reserved_extents += nr_extents; spin_unlock(&BTRFS_I(inode)->lock); - mutex_unlock(&BTRFS_I(inode)->delalloc_mutex); + + if (delalloc_lock) + mutex_unlock(&BTRFS_I(inode)->delalloc_mutex); if (to_reserve) trace_btrfs_space_reservation(root->fs_info,"delalloc", @@ -4969,9 +4991,13 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end) { struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_block_group_cache *cache = NULL; + struct btrfs_space_info *space_info; + struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv; u64 len; + bool readonly; while (start <= end) { + readonly = false; if (!cache || start >= cache->key.objectid + cache->key.offset) { if (cache) @@ -4989,15 +5015,30 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end) } start += len; + space_info = cache->space_info; - spin_lock(&cache->space_info->lock); + spin_lock(&space_info->lock); spin_lock(&cache->lock); cache->pinned -= len; - cache->space_info->bytes_pinned -= len; - if (cache->ro) - cache->space_info->bytes_readonly += len; + space_info->bytes_pinned -= len; + if (cache->ro) { + space_info->bytes_readonly += len; + readonly = true; + } spin_unlock(&cache->lock); - spin_unlock(&cache->space_info->lock); + if (!readonly && global_rsv->space_info == space_info) { + spin_lock(&global_rsv->lock); + if (!global_rsv->full) { + len = min(len, global_rsv->size - + global_rsv->reserved); + global_rsv->reserved += len; + space_info->bytes_may_use += len; + if (global_rsv->reserved >= global_rsv->size) + global_rsv->full = 1; + } + spin_unlock(&global_rsv->lock); + } + spin_unlock(&space_info->lock); } if (cache) @@ -5466,7 +5507,7 @@ wait_block_group_cache_done(struct btrfs_block_group_cache *cache) return 0; } -static int __get_block_group_index(u64 flags) +int __get_raid_index(u64 flags) { int index; @@ -5486,7 +5527,7 @@ static int __get_block_group_index(u64 flags) static int get_block_group_index(struct btrfs_block_group_cache *cache) { - return __get_block_group_index(cache->flags); + return __get_raid_index(cache->flags); } enum btrfs_loop_type { @@ -5519,7 +5560,7 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, int empty_cluster = 2 * 1024 * 1024; struct btrfs_space_info *space_info; int loop = 0; - int index = 0; + int index = __get_raid_index(data); int alloc_type = (data & BTRFS_BLOCK_GROUP_DATA) ? RESERVE_ALLOC_NO_ACCOUNT : RESERVE_ALLOC; bool found_uncached_bg = false; @@ -6269,7 +6310,8 @@ use_block_rsv(struct btrfs_trans_handle *trans, block_rsv = get_block_rsv(trans, root); if (block_rsv->size == 0) { - ret = reserve_metadata_bytes(root, block_rsv, blocksize, 0); + ret = reserve_metadata_bytes(root, block_rsv, blocksize, + BTRFS_RESERVE_NO_FLUSH); /* * If we couldn't reserve metadata bytes try and use some from * the global reserve. @@ -6292,11 +6334,11 @@ use_block_rsv(struct btrfs_trans_handle *trans, static DEFINE_RATELIMIT_STATE(_rs, DEFAULT_RATELIMIT_INTERVAL, /*DEFAULT_RATELIMIT_BURST*/ 2); - if (__ratelimit(&_rs)) { - printk(KERN_DEBUG "btrfs: block rsv returned %d\n", ret); - WARN_ON(1); - } - ret = reserve_metadata_bytes(root, block_rsv, blocksize, 0); + if (__ratelimit(&_rs)) + WARN(1, KERN_DEBUG "btrfs: block rsv returned %d\n", + ret); + ret = reserve_metadata_bytes(root, block_rsv, blocksize, + BTRFS_RESERVE_NO_FLUSH); if (!ret) { return block_rsv; } else if (ret && block_rsv != global_rsv) { @@ -6746,11 +6788,13 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans, &wc->flags[level]); if (ret < 0) { btrfs_tree_unlock_rw(eb, path->locks[level]); + path->locks[level] = 0; return ret; } BUG_ON(wc->refs[level] == 0); if (wc->refs[level] == 1) { btrfs_tree_unlock_rw(eb, path->locks[level]); + path->locks[level] = 0; return 1; } } @@ -7427,7 +7471,7 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) */ target = get_restripe_target(root->fs_info, block_group->flags); if (target) { - index = __get_block_group_index(extended_to_chunk(target)); + index = __get_raid_index(extended_to_chunk(target)); } else { /* * this is just a balance, so if we were marked as full @@ -7461,7 +7505,8 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr) * check to make sure we can actually find a chunk with enough * space to fit our block group in. */ - if (device->total_bytes > device->bytes_used + min_free) { + if (device->total_bytes > device->bytes_used + min_free && + !device->is_tgtdev_for_dev_replace) { ret = find_free_dev_extent(device, min_free, &dev_offset, NULL); if (!ret) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 472873a94d9..1b319df29ee 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -341,12 +341,10 @@ static int insert_state(struct extent_io_tree *tree, { struct rb_node *node; - if (end < start) { - printk(KERN_ERR "btrfs end < start %llu %llu\n", + if (end < start) + WARN(1, KERN_ERR "btrfs end < start %llu %llu\n", (unsigned long long)end, (unsigned long long)start); - WARN_ON(1); - } state->start = start; state->end = end; @@ -1919,12 +1917,12 @@ static void repair_io_failure_callback(struct bio *bio, int err) * the standard behavior is to write all copies in a raid setup. here we only * want to write the one bad copy. so we do the mapping for ourselves and issue * submit_bio directly. - * to avoid any synchonization issues, wait for the data after writing, which + * to avoid any synchronization issues, wait for the data after writing, which * actually prevents the read that triggered the error from finishing. * currently, there can be no more than two copies of every data bit. thus, * exactly one rewrite is required. */ -int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, +int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start, u64 length, u64 logical, struct page *page, int mirror_num) { @@ -1946,7 +1944,7 @@ int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, bio->bi_size = 0; map_length = length; - ret = btrfs_map_block(map_tree, WRITE, logical, + ret = btrfs_map_block(fs_info, WRITE, logical, &map_length, &bbio, mirror_num); if (ret) { bio_put(bio); @@ -1984,14 +1982,13 @@ int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb, int mirror_num) { - struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree; u64 start = eb->start; unsigned long i, num_pages = num_extent_pages(eb->start, eb->len); int ret = 0; for (i = 0; i < num_pages; i++) { struct page *p = extent_buffer_page(eb, i); - ret = repair_io_failure(map_tree, start, PAGE_CACHE_SIZE, + ret = repair_io_failure(root->fs_info, start, PAGE_CACHE_SIZE, start, p, mirror_num); if (ret) break; @@ -2010,7 +2007,7 @@ static int clean_io_failure(u64 start, struct page *page) u64 private; u64 private_failure; struct io_failure_record *failrec; - struct btrfs_mapping_tree *map_tree; + struct btrfs_fs_info *fs_info; struct extent_state *state; int num_copies; int did_repair = 0; @@ -2046,11 +2043,11 @@ static int clean_io_failure(u64 start, struct page *page) spin_unlock(&BTRFS_I(inode)->io_tree.lock); if (state && state->start == failrec->start) { - map_tree = &BTRFS_I(inode)->root->fs_info->mapping_tree; - num_copies = btrfs_num_copies(map_tree, failrec->logical, - failrec->len); + fs_info = BTRFS_I(inode)->root->fs_info; + num_copies = btrfs_num_copies(fs_info, failrec->logical, + failrec->len); if (num_copies > 1) { - ret = repair_io_failure(map_tree, start, failrec->len, + ret = repair_io_failure(fs_info, start, failrec->len, failrec->logical, page, failrec->failed_mirror); did_repair = !ret; @@ -2159,9 +2156,8 @@ static int bio_readpage_error(struct bio *failed_bio, struct page *page, * clean_io_failure() clean all those errors at once. */ } - num_copies = btrfs_num_copies( - &BTRFS_I(inode)->root->fs_info->mapping_tree, - failrec->logical, failrec->len); + num_copies = btrfs_num_copies(BTRFS_I(inode)->root->fs_info, + failrec->logical, failrec->len); if (num_copies == 1) { /* * we only have a single copy of the data, so don't bother with @@ -2466,10 +2462,6 @@ btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, return bio; } -/* - * Since writes are async, they will only return -ENOMEM. - * Reads can return the full range of I/O error conditions. - */ static int __must_check submit_one_bio(int rw, struct bio *bio, int mirror_num, unsigned long bio_flags) { @@ -4721,10 +4713,9 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start, } if (start + min_len > eb->len) { - printk(KERN_ERR "btrfs bad mapping eb start %llu len %lu, " + WARN(1, KERN_ERR "btrfs bad mapping eb start %llu len %lu, " "wanted %lu %lu\n", (unsigned long long)eb->start, eb->len, start, min_len); - WARN_ON(1); return -EINVAL; } diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 711d12b8002..2eacfabd326 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -337,9 +337,9 @@ struct bio * btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, gfp_t gfp_flags); -struct btrfs_mapping_tree; +struct btrfs_fs_info; -int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, +int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start, u64 length, u64 logical, struct page *page, int mirror_num); int end_extent_writepage(struct page *page, int err, u64 start, u64 end); diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index ce9f7921672..2e8cae63d24 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -49,7 +49,7 @@ void extent_map_tree_init(struct extent_map_tree *tree) struct extent_map *alloc_extent_map(void) { struct extent_map *em; - em = kmem_cache_alloc(extent_map_cache, GFP_NOFS); + em = kmem_cache_zalloc(extent_map_cache, GFP_NOFS); if (!em) return NULL; em->in_tree = 0; @@ -171,6 +171,10 @@ static int mergable_maps(struct extent_map *prev, struct extent_map *next) if (test_bit(EXTENT_FLAG_COMPRESSED, &prev->flags)) return 0; + if (test_bit(EXTENT_FLAG_LOGGING, &prev->flags) || + test_bit(EXTENT_FLAG_LOGGING, &next->flags)) + return 0; + if (extent_map_end(prev) == next->start && prev->flags == next->flags && prev->bdev == next->bdev && @@ -198,16 +202,15 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em) merge = rb_entry(rb, struct extent_map, rb_node); if (rb && mergable_maps(merge, em)) { em->start = merge->start; + em->orig_start = merge->orig_start; em->len += merge->len; em->block_len += merge->block_len; em->block_start = merge->block_start; merge->in_tree = 0; - if (merge->generation > em->generation) { - em->mod_start = em->start; - em->mod_len = em->len; - em->generation = merge->generation; - list_move(&em->list, &tree->modified_extents); - } + em->mod_len = (em->mod_len + em->mod_start) - merge->mod_start; + em->mod_start = merge->mod_start; + em->generation = max(em->generation, merge->generation); + list_move(&em->list, &tree->modified_extents); list_del_init(&merge->list); rb_erase(&merge->rb_node, &tree->map); @@ -223,11 +226,8 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em) em->block_len += merge->len; rb_erase(&merge->rb_node, &tree->map); merge->in_tree = 0; - if (merge->generation > em->generation) { - em->mod_len = em->len; - em->generation = merge->generation; - list_move(&em->list, &tree->modified_extents); - } + em->mod_len = (merge->mod_start + merge->mod_len) - em->mod_start; + em->generation = max(em->generation, merge->generation); list_del_init(&merge->list); free_extent_map(merge); } @@ -259,15 +259,16 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, if (!em) goto out; - list_move(&em->list, &tree->modified_extents); + if (!test_bit(EXTENT_FLAG_LOGGING, &em->flags)) + list_move(&em->list, &tree->modified_extents); em->generation = gen; clear_bit(EXTENT_FLAG_PINNED, &em->flags); em->mod_start = em->start; em->mod_len = em->len; - if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) { + if (test_bit(EXTENT_FLAG_FILLING, &em->flags)) { prealloc = true; - clear_bit(EXTENT_FLAG_PREALLOC, &em->flags); + clear_bit(EXTENT_FLAG_FILLING, &em->flags); } try_merge_map(tree, em); @@ -284,6 +285,12 @@ out: } +void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em) +{ + clear_bit(EXTENT_FLAG_LOGGING, &em->flags); + try_merge_map(tree, em); +} + /** * add_extent_mapping - add new extent map to the extent tree * @tree: tree to insert new map in diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index 679225555f7..c6598c89cff 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -14,6 +14,7 @@ #define EXTENT_FLAG_VACANCY 2 /* no file extent item found */ #define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */ #define EXTENT_FLAG_LOGGING 4 /* Logging this extent */ +#define EXTENT_FLAG_FILLING 5 /* Filling in a preallocated extent */ struct extent_map { struct rb_node rb_node; @@ -24,6 +25,7 @@ struct extent_map { u64 mod_start; u64 mod_len; u64 orig_start; + u64 orig_block_len; u64 block_start; u64 block_len; u64 generation; @@ -67,6 +69,7 @@ void free_extent_map(struct extent_map *em); int __init extent_map_init(void); void extent_map_exit(void); int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen); +void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em); struct extent_map *search_extent_mapping(struct extent_map_tree *tree, u64 start, u64 len); #endif diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 1ad08e4e4a1..94aa53b3872 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -133,7 +133,6 @@ fail: return ERR_PTR(ret); } - int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u64 objectid, @@ -151,6 +150,26 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, return ret; } +u64 btrfs_file_extent_length(struct btrfs_path *path) +{ + int extent_type; + struct btrfs_file_extent_item *fi; + u64 len; + + fi = btrfs_item_ptr(path->nodes[0], path->slots[0], + struct btrfs_file_extent_item); + extent_type = btrfs_file_extent_type(path->nodes[0], fi); + + if (extent_type == BTRFS_FILE_EXTENT_REG || + extent_type == BTRFS_FILE_EXTENT_PREALLOC) + len = btrfs_file_extent_num_bytes(path->nodes[0], fi); + else if (extent_type == BTRFS_FILE_EXTENT_INLINE) + len = btrfs_file_extent_inline_len(path->nodes[0], fi); + else + BUG(); + + return len; +} static int __btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, struct bio *bio, @@ -441,8 +460,8 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, if (!contig) offset = page_offset(bvec->bv_page) + bvec->bv_offset; - if (!contig && (offset >= ordered->file_offset + ordered->len || - offset < ordered->file_offset)) { + if (offset >= ordered->file_offset + ordered->len || + offset < ordered->file_offset) { unsigned long bytes_left; sums->len = this_sum_bytes; this_sum_bytes = 0; diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 9ab1bed8811..f76b1fd160d 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -41,6 +41,7 @@ #include "compat.h" #include "volumes.h" +static struct kmem_cache *btrfs_inode_defrag_cachep; /* * when auto defrag is enabled we * queue up these defrag structs to remember which @@ -90,7 +91,7 @@ static int __compare_inode_defrag(struct inode_defrag *defrag1, * If an existing record is found the defrag item you * pass in is freed */ -static void __btrfs_add_inode_defrag(struct inode *inode, +static int __btrfs_add_inode_defrag(struct inode *inode, struct inode_defrag *defrag) { struct btrfs_root *root = BTRFS_I(inode)->root; @@ -118,18 +119,24 @@ static void __btrfs_add_inode_defrag(struct inode *inode, entry->transid = defrag->transid; if (defrag->last_offset > entry->last_offset) entry->last_offset = defrag->last_offset; - goto exists; + return -EEXIST; } } set_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags); rb_link_node(&defrag->rb_node, parent, p); rb_insert_color(&defrag->rb_node, &root->fs_info->defrag_inodes); - return; + return 0; +} -exists: - kfree(defrag); - return; +static inline int __need_auto_defrag(struct btrfs_root *root) +{ + if (!btrfs_test_opt(root, AUTO_DEFRAG)) + return 0; + + if (btrfs_fs_closing(root->fs_info)) + return 0; + return 1; } /* @@ -142,11 +149,9 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, struct btrfs_root *root = BTRFS_I(inode)->root; struct inode_defrag *defrag; u64 transid; + int ret; - if (!btrfs_test_opt(root, AUTO_DEFRAG)) - return 0; - - if (btrfs_fs_closing(root->fs_info)) + if (!__need_auto_defrag(root)) return 0; if (test_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags)) @@ -157,7 +162,7 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, else transid = BTRFS_I(inode)->root->last_trans; - defrag = kzalloc(sizeof(*defrag), GFP_NOFS); + defrag = kmem_cache_zalloc(btrfs_inode_defrag_cachep, GFP_NOFS); if (!defrag) return -ENOMEM; @@ -166,20 +171,56 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, defrag->root = root->root_key.objectid; spin_lock(&root->fs_info->defrag_inodes_lock); - if (!test_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags)) - __btrfs_add_inode_defrag(inode, defrag); - else - kfree(defrag); + if (!test_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags)) { + /* + * If we set IN_DEFRAG flag and evict the inode from memory, + * and then re-read this inode, this new inode doesn't have + * IN_DEFRAG flag. At the case, we may find the existed defrag. + */ + ret = __btrfs_add_inode_defrag(inode, defrag); + if (ret) + kmem_cache_free(btrfs_inode_defrag_cachep, defrag); + } else { + kmem_cache_free(btrfs_inode_defrag_cachep, defrag); + } spin_unlock(&root->fs_info->defrag_inodes_lock); return 0; } /* - * must be called with the defrag_inodes lock held + * Requeue the defrag object. If there is a defrag object that points to + * the same inode in the tree, we will merge them together (by + * __btrfs_add_inode_defrag()) and free the one that we want to requeue. + */ +void btrfs_requeue_inode_defrag(struct inode *inode, + struct inode_defrag *defrag) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + int ret; + + if (!__need_auto_defrag(root)) + goto out; + + /* + * Here we don't check the IN_DEFRAG flag, because we need merge + * them together. + */ + spin_lock(&root->fs_info->defrag_inodes_lock); + ret = __btrfs_add_inode_defrag(inode, defrag); + spin_unlock(&root->fs_info->defrag_inodes_lock); + if (ret) + goto out; + return; +out: + kmem_cache_free(btrfs_inode_defrag_cachep, defrag); +} + +/* + * pick the defragable inode that we want, if it doesn't exist, we will get + * the next one. */ -struct inode_defrag *btrfs_find_defrag_inode(struct btrfs_fs_info *info, - u64 root, u64 ino, - struct rb_node **next) +static struct inode_defrag * +btrfs_pick_defrag_inode(struct btrfs_fs_info *fs_info, u64 root, u64 ino) { struct inode_defrag *entry = NULL; struct inode_defrag tmp; @@ -190,7 +231,8 @@ struct inode_defrag *btrfs_find_defrag_inode(struct btrfs_fs_info *info, tmp.ino = ino; tmp.root = root; - p = info->defrag_inodes.rb_node; + spin_lock(&fs_info->defrag_inodes_lock); + p = fs_info->defrag_inodes.rb_node; while (p) { parent = p; entry = rb_entry(parent, struct inode_defrag, rb_node); @@ -201,52 +243,131 @@ struct inode_defrag *btrfs_find_defrag_inode(struct btrfs_fs_info *info, else if (ret > 0) p = parent->rb_right; else - return entry; + goto out; } - if (next) { - while (parent && __compare_inode_defrag(&tmp, entry) > 0) { - parent = rb_next(parent); + if (parent && __compare_inode_defrag(&tmp, entry) > 0) { + parent = rb_next(parent); + if (parent) entry = rb_entry(parent, struct inode_defrag, rb_node); - } - *next = parent; + else + entry = NULL; } - return NULL; +out: + if (entry) + rb_erase(parent, &fs_info->defrag_inodes); + spin_unlock(&fs_info->defrag_inodes_lock); + return entry; } -/* - * run through the list of inodes in the FS that need - * defragging - */ -int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info) +void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info) { struct inode_defrag *defrag; + struct rb_node *node; + + spin_lock(&fs_info->defrag_inodes_lock); + node = rb_first(&fs_info->defrag_inodes); + while (node) { + rb_erase(node, &fs_info->defrag_inodes); + defrag = rb_entry(node, struct inode_defrag, rb_node); + kmem_cache_free(btrfs_inode_defrag_cachep, defrag); + + if (need_resched()) { + spin_unlock(&fs_info->defrag_inodes_lock); + cond_resched(); + spin_lock(&fs_info->defrag_inodes_lock); + } + + node = rb_first(&fs_info->defrag_inodes); + } + spin_unlock(&fs_info->defrag_inodes_lock); +} + +#define BTRFS_DEFRAG_BATCH 1024 + +static int __btrfs_run_defrag_inode(struct btrfs_fs_info *fs_info, + struct inode_defrag *defrag) +{ struct btrfs_root *inode_root; struct inode *inode; - struct rb_node *n; struct btrfs_key key; struct btrfs_ioctl_defrag_range_args range; - u64 first_ino = 0; - u64 root_objectid = 0; int num_defrag; - int defrag_batch = 1024; + /* get the inode */ + key.objectid = defrag->root; + btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); + key.offset = (u64)-1; + inode_root = btrfs_read_fs_root_no_name(fs_info, &key); + if (IS_ERR(inode_root)) { + kmem_cache_free(btrfs_inode_defrag_cachep, defrag); + return PTR_ERR(inode_root); + } + + key.objectid = defrag->ino; + btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); + key.offset = 0; + inode = btrfs_iget(fs_info->sb, &key, inode_root, NULL); + if (IS_ERR(inode)) { + kmem_cache_free(btrfs_inode_defrag_cachep, defrag); + return PTR_ERR(inode); + } + + /* do a chunk of defrag */ + clear_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags); memset(&range, 0, sizeof(range)); range.len = (u64)-1; + range.start = defrag->last_offset; + + sb_start_write(fs_info->sb); + num_defrag = btrfs_defrag_file(inode, NULL, &range, defrag->transid, + BTRFS_DEFRAG_BATCH); + sb_end_write(fs_info->sb); + /* + * if we filled the whole defrag batch, there + * must be more work to do. Queue this defrag + * again + */ + if (num_defrag == BTRFS_DEFRAG_BATCH) { + defrag->last_offset = range.start; + btrfs_requeue_inode_defrag(inode, defrag); + } else if (defrag->last_offset && !defrag->cycled) { + /* + * we didn't fill our defrag batch, but + * we didn't start at zero. Make sure we loop + * around to the start of the file. + */ + defrag->last_offset = 0; + defrag->cycled = 1; + btrfs_requeue_inode_defrag(inode, defrag); + } else { + kmem_cache_free(btrfs_inode_defrag_cachep, defrag); + } + + iput(inode); + return 0; +} + +/* + * run through the list of inodes in the FS that need + * defragging + */ +int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info) +{ + struct inode_defrag *defrag; + u64 first_ino = 0; + u64 root_objectid = 0; atomic_inc(&fs_info->defrag_running); - spin_lock(&fs_info->defrag_inodes_lock); while(1) { - n = NULL; + if (!__need_auto_defrag(fs_info->tree_root)) + break; /* find an inode to defrag */ - defrag = btrfs_find_defrag_inode(fs_info, root_objectid, - first_ino, &n); + defrag = btrfs_pick_defrag_inode(fs_info, root_objectid, + first_ino); if (!defrag) { - if (n) { - defrag = rb_entry(n, struct inode_defrag, - rb_node); - } else if (root_objectid || first_ino) { + if (root_objectid || first_ino) { root_objectid = 0; first_ino = 0; continue; @@ -255,70 +376,11 @@ int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info) } } - /* remove it from the rbtree */ first_ino = defrag->ino + 1; root_objectid = defrag->root; - rb_erase(&defrag->rb_node, &fs_info->defrag_inodes); - - if (btrfs_fs_closing(fs_info)) - goto next_free; - - spin_unlock(&fs_info->defrag_inodes_lock); - - /* get the inode */ - key.objectid = defrag->root; - btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); - key.offset = (u64)-1; - inode_root = btrfs_read_fs_root_no_name(fs_info, &key); - if (IS_ERR(inode_root)) - goto next; - - key.objectid = defrag->ino; - btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); - key.offset = 0; - - inode = btrfs_iget(fs_info->sb, &key, inode_root, NULL); - if (IS_ERR(inode)) - goto next; - - /* do a chunk of defrag */ - clear_bit(BTRFS_INODE_IN_DEFRAG, &BTRFS_I(inode)->runtime_flags); - range.start = defrag->last_offset; - num_defrag = btrfs_defrag_file(inode, NULL, &range, defrag->transid, - defrag_batch); - /* - * if we filled the whole defrag batch, there - * must be more work to do. Queue this defrag - * again - */ - if (num_defrag == defrag_batch) { - defrag->last_offset = range.start; - __btrfs_add_inode_defrag(inode, defrag); - /* - * we don't want to kfree defrag, we added it back to - * the rbtree - */ - defrag = NULL; - } else if (defrag->last_offset && !defrag->cycled) { - /* - * we didn't fill our defrag batch, but - * we didn't start at zero. Make sure we loop - * around to the start of the file. - */ - defrag->last_offset = 0; - defrag->cycled = 1; - __btrfs_add_inode_defrag(inode, defrag); - defrag = NULL; - } - iput(inode); -next: - spin_lock(&fs_info->defrag_inodes_lock); -next_free: - kfree(defrag); + __btrfs_run_defrag_inode(fs_info, defrag); } - spin_unlock(&fs_info->defrag_inodes_lock); - atomic_dec(&fs_info->defrag_running); /* @@ -526,6 +588,8 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split->block_len = em->block_len; else split->block_len = split->len; + split->orig_block_len = max(split->block_len, + em->orig_block_len); split->generation = gen; split->bdev = em->bdev; split->flags = flags; @@ -547,6 +611,8 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split->flags = flags; split->compress_type = em->compress_type; split->generation = gen; + split->orig_block_len = max(em->block_len, + em->orig_block_len); if (compressed) { split->block_len = em->block_len; @@ -555,7 +621,7 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, } else { split->block_len = split->len; split->block_start = em->block_start + diff; - split->orig_start = split->start; + split->orig_start = em->orig_start; } ret = add_extent_mapping(em_tree, split); @@ -1346,10 +1412,9 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, cond_resched(); - balance_dirty_pages_ratelimited_nr(inode->i_mapping, - dirty_pages); + balance_dirty_pages_ratelimited(inode->i_mapping); if (dirty_pages < (root->leafsize >> PAGE_CACHE_SHIFT) + 1) - btrfs_btree_balance_dirty(root, 1); + btrfs_btree_balance_dirty(root); pos += copied; num_written += copied; @@ -1398,6 +1463,24 @@ out: return written ? written : err; } +static void update_time_for_write(struct inode *inode) +{ + struct timespec now; + + if (IS_NOCMTIME(inode)) + return; + + now = current_fs_time(inode->i_sb); + if (!timespec_equal(&inode->i_mtime, &now)) + inode->i_mtime = now; + + if (!timespec_equal(&inode->i_ctime, &now)) + inode->i_ctime = now; + + if (IS_I_VERSION(inode)) + inode_inc_iversion(inode); +} + static ssize_t btrfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) @@ -1410,6 +1493,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, ssize_t num_written = 0; ssize_t err = 0; size_t count, ocount; + bool sync = (file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host); sb_start_write(inode->i_sb); @@ -1452,11 +1536,13 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, goto out; } - err = file_update_time(file); - if (err) { - mutex_unlock(&inode->i_mutex); - goto out; - } + /* + * We reserve space for updating the inode when we reserve space for the + * extent we are going to write, so we will enospc out there. We don't + * need to start yet another transaction to update the inode as we will + * update the inode when we finish writing whatever data we write. + */ + update_time_for_write(inode); start_pos = round_down(pos, root->sectorsize); if (start_pos > i_size_read(inode)) { @@ -1467,6 +1553,9 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, } } + if (sync) + atomic_inc(&BTRFS_I(inode)->sync_writers); + if (unlikely(file->f_flags & O_DIRECT)) { num_written = __btrfs_direct_write(iocb, iov, nr_segs, pos, ppos, count, ocount); @@ -1493,14 +1582,21 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, * this will either be one more than the running transaction * or the generation used for the next transaction if there isn't * one running right now. + * + * We also have to set last_sub_trans to the current log transid, + * otherwise subsequent syncs to a file that's been synced in this + * transaction will appear to have already occured. */ BTRFS_I(inode)->last_trans = root->fs_info->generation + 1; + BTRFS_I(inode)->last_sub_trans = root->log_transid; if (num_written > 0 || num_written == -EIOCBQUEUED) { err = generic_write_sync(file, pos, num_written); if (err < 0 && num_written > 0) num_written = err; } out: + if (sync) + atomic_dec(&BTRFS_I(inode)->sync_writers); sb_end_write(inode->i_sb); current->backing_dev_info = NULL; return num_written ? num_written : err; @@ -1551,7 +1647,9 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) * out of the ->i_mutex. If so, we can flush the dirty pages by * multi-task, and make the performance up. */ + atomic_inc(&BTRFS_I(inode)->sync_writers); ret = filemap_write_and_wait_range(inode->i_mapping, start, end); + atomic_dec(&BTRFS_I(inode)->sync_writers); if (ret) return ret; @@ -1562,7 +1660,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) * range being left. */ atomic_inc(&root->log_batch); - btrfs_wait_ordered_range(inode, start, end); + btrfs_wait_ordered_range(inode, start, end - start + 1); atomic_inc(&root->log_batch); /* @@ -1768,6 +1866,7 @@ out: hole_em->block_start = EXTENT_MAP_HOLE; hole_em->block_len = 0; + hole_em->orig_block_len = 0; hole_em->bdev = root->fs_info->fs_devices->latest_bdev; hole_em->compress_type = BTRFS_COMPRESS_NONE; hole_em->generation = trans->transid; @@ -1797,48 +1896,51 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len) struct btrfs_path *path; struct btrfs_block_rsv *rsv; struct btrfs_trans_handle *trans; - u64 mask = BTRFS_I(inode)->root->sectorsize - 1; - u64 lockstart = (offset + mask) & ~mask; - u64 lockend = ((offset + len) & ~mask) - 1; + u64 lockstart = round_up(offset, BTRFS_I(inode)->root->sectorsize); + u64 lockend = round_down(offset + len, + BTRFS_I(inode)->root->sectorsize) - 1; u64 cur_offset = lockstart; u64 min_size = btrfs_calc_trunc_metadata_size(root, 1); u64 drop_end; - unsigned long nr; int ret = 0; int err = 0; - bool same_page = (offset >> PAGE_CACHE_SHIFT) == - ((offset + len) >> PAGE_CACHE_SHIFT); + bool same_page = ((offset >> PAGE_CACHE_SHIFT) == + ((offset + len - 1) >> PAGE_CACHE_SHIFT)); btrfs_wait_ordered_range(inode, offset, len); mutex_lock(&inode->i_mutex); - if (offset >= inode->i_size) { - mutex_unlock(&inode->i_mutex); - return 0; - } - + /* + * We needn't truncate any page which is beyond the end of the file + * because we are sure there is no data there. + */ /* * Only do this if we are in the same page and we aren't doing the * entire page. */ if (same_page && len < PAGE_CACHE_SIZE) { - ret = btrfs_truncate_page(inode, offset, len, 0); + if (offset < round_up(inode->i_size, PAGE_CACHE_SIZE)) + ret = btrfs_truncate_page(inode, offset, len, 0); mutex_unlock(&inode->i_mutex); return ret; } /* zero back part of the first page */ - ret = btrfs_truncate_page(inode, offset, 0, 0); - if (ret) { - mutex_unlock(&inode->i_mutex); - return ret; + if (offset < round_up(inode->i_size, PAGE_CACHE_SIZE)) { + ret = btrfs_truncate_page(inode, offset, 0, 0); + if (ret) { + mutex_unlock(&inode->i_mutex); + return ret; + } } /* zero the front end of the last page */ - ret = btrfs_truncate_page(inode, offset + len, 0, 1); - if (ret) { - mutex_unlock(&inode->i_mutex); - return ret; + if (offset + len < round_up(inode->i_size, PAGE_CACHE_SIZE)) { + ret = btrfs_truncate_page(inode, offset + len, 0, 1); + if (ret) { + mutex_unlock(&inode->i_mutex); + return ret; + } } if (lockend < lockstart) { @@ -1931,9 +2033,8 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len) break; } - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); trans = btrfs_start_transaction(root, 3); if (IS_ERR(trans)) { @@ -1964,11 +2065,13 @@ out_trans: if (!trans) goto out_free; + inode_inc_iversion(inode); + inode->i_mtime = inode->i_ctime = CURRENT_TIME; + trans->block_rsv = &root->fs_info->trans_block_rsv; ret = btrfs_update_inode(trans, root, inode); - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); out_free: btrfs_free_path(path); btrfs_free_block_rsv(root, rsv); @@ -1992,12 +2095,12 @@ static long btrfs_fallocate(struct file *file, int mode, u64 alloc_end; u64 alloc_hint = 0; u64 locked_end; - u64 mask = BTRFS_I(inode)->root->sectorsize - 1; struct extent_map *em; + int blocksize = BTRFS_I(inode)->root->sectorsize; int ret; - alloc_start = offset & ~mask; - alloc_end = (offset + len + mask) & ~mask; + alloc_start = round_down(offset, blocksize); + alloc_end = round_up(offset + len, blocksize); /* Make sure we aren't being give some crap mode */ if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) @@ -2010,7 +2113,7 @@ static long btrfs_fallocate(struct file *file, int mode, * Make sure we have enough space before we do the * allocation. */ - ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start + 1); + ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start); if (ret) return ret; @@ -2078,7 +2181,7 @@ static long btrfs_fallocate(struct file *file, int mode, } last_byte = min(extent_map_end(em), alloc_end); actual_end = min_t(u64, extent_map_end(em), offset + len); - last_byte = (last_byte + mask) & ~mask; + last_byte = ALIGN(last_byte, blocksize); if (em->block_start == EXTENT_MAP_HOLE || (cur_offset >= inode->i_size && @@ -2117,11 +2220,11 @@ static long btrfs_fallocate(struct file *file, int mode, out: mutex_unlock(&inode->i_mutex); /* Let go of our reservation. */ - btrfs_free_reserved_data_space(inode, alloc_end - alloc_start + 1); + btrfs_free_reserved_data_space(inode, alloc_end - alloc_start); return ret; } -static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) +static int find_desired_extent(struct inode *inode, loff_t *offset, int whence) { struct btrfs_root *root = BTRFS_I(inode)->root; struct extent_map *em; @@ -2138,6 +2241,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) if (lockend <= lockstart) lockend = lockstart + root->sectorsize; + lockend--; len = lockend - lockstart + 1; len = max_t(u64, len, root->sectorsize); @@ -2155,7 +2259,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) * before the position we want in case there is outstanding delalloc * going on here. */ - if (origin == SEEK_HOLE && start != 0) { + if (whence == SEEK_HOLE && start != 0) { if (start <= root->sectorsize) em = btrfs_get_extent_fiemap(inode, NULL, 0, 0, root->sectorsize, 0); @@ -2189,13 +2293,13 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) } } - if (origin == SEEK_HOLE) { + if (whence == SEEK_HOLE) { *offset = start; free_extent_map(em); break; } } else { - if (origin == SEEK_DATA) { + if (whence == SEEK_DATA) { if (em->block_start == EXTENT_MAP_DELALLOC) { if (start >= inode->i_size) { free_extent_map(em); @@ -2204,9 +2308,12 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) } } - *offset = start; - free_extent_map(em); - break; + if (!test_bit(EXTENT_FLAG_PREALLOC, + &em->flags)) { + *offset = start; + free_extent_map(em); + break; + } } } @@ -2232,16 +2339,16 @@ out: return ret; } -static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin) +static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; int ret; mutex_lock(&inode->i_mutex); - switch (origin) { + switch (whence) { case SEEK_END: case SEEK_CUR: - offset = generic_file_llseek(file, offset, origin); + offset = generic_file_llseek(file, offset, whence); goto out; case SEEK_DATA: case SEEK_HOLE: @@ -2250,7 +2357,7 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin) return -ENXIO; } - ret = find_desired_extent(inode, &offset, origin); + ret = find_desired_extent(inode, &offset, whence); if (ret) { mutex_unlock(&inode->i_mutex); return ret; @@ -2293,3 +2400,21 @@ const struct file_operations btrfs_file_operations = { .compat_ioctl = btrfs_ioctl, #endif }; + +void btrfs_auto_defrag_exit(void) +{ + if (btrfs_inode_defrag_cachep) + kmem_cache_destroy(btrfs_inode_defrag_cachep); +} + +int btrfs_auto_defrag_init(void) +{ + btrfs_inode_defrag_cachep = kmem_cache_create("btrfs_inode_defrag", + sizeof(struct inode_defrag), 0, + SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, + NULL); + if (!btrfs_inode_defrag_cachep) + return -ENOMEM; + + return 0; +} diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 1027b854b90..0be7a8742a4 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -307,7 +307,6 @@ static void io_ctl_unmap_page(struct io_ctl *io_ctl) static void io_ctl_map_page(struct io_ctl *io_ctl, int clear) { - WARN_ON(io_ctl->cur); BUG_ON(io_ctl->index >= io_ctl->num_pages); io_ctl->page = io_ctl->pages[io_ctl->index++]; io_ctl->cur = kmap(io_ctl->page); @@ -1250,18 +1249,13 @@ tree_search_offset(struct btrfs_free_space_ctl *ctl, * if previous extent entry covers the offset, * we should return it instead of the bitmap entry */ - n = &entry->offset_index; - while (1) { - n = rb_prev(n); - if (!n) - break; + n = rb_prev(&entry->offset_index); + if (n) { prev = rb_entry(n, struct btrfs_free_space, offset_index); - if (!prev->bitmap) { - if (prev->offset + prev->bytes > offset) - entry = prev; - break; - } + if (!prev->bitmap && + prev->offset + prev->bytes > offset) + entry = prev; } } return entry; @@ -1287,18 +1281,13 @@ tree_search_offset(struct btrfs_free_space_ctl *ctl, } if (entry->bitmap) { - n = &entry->offset_index; - while (1) { - n = rb_prev(n); - if (!n) - break; + n = rb_prev(&entry->offset_index); + if (n) { prev = rb_entry(n, struct btrfs_free_space, offset_index); - if (!prev->bitmap) { - if (prev->offset + prev->bytes > offset) - return prev; - break; - } + if (!prev->bitmap && + prev->offset + prev->bytes > offset) + return prev; } if (entry->offset + BITS_PER_BITMAP * ctl->unit > offset) return entry; @@ -1364,7 +1353,7 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl) u64 bitmap_bytes; u64 extent_bytes; u64 size = block_group->key.offset; - u64 bytes_per_bg = BITS_PER_BITMAP * block_group->sectorsize; + u64 bytes_per_bg = BITS_PER_BITMAP * ctl->unit; int max_bitmaps = div64_u64(size + bytes_per_bg - 1, bytes_per_bg); BUG_ON(ctl->total_bitmaps > max_bitmaps); @@ -1650,8 +1639,7 @@ static bool use_bitmap(struct btrfs_free_space_ctl *ctl, * some block groups are so tiny they can't be enveloped by a bitmap, so * don't even bother to create a bitmap for this */ - if (BITS_PER_BITMAP * block_group->sectorsize > - block_group->key.offset) + if (BITS_PER_BITMAP * ctl->unit > block_group->key.offset) return false; return true; @@ -1874,11 +1862,13 @@ int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group, { struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl; struct btrfs_free_space *info; - int ret = 0; + int ret; + bool re_search = false; spin_lock(&ctl->tree_lock); again: + ret = 0; if (!bytes) goto out_lock; @@ -1891,17 +1881,17 @@ again: info = tree_search_offset(ctl, offset_to_bitmap(ctl, offset), 1, 0); if (!info) { - /* the tree logging code might be calling us before we - * have fully loaded the free space rbtree for this - * block group. So it is possible the entry won't - * be in the rbtree yet at all. The caching code - * will make sure not to put it in the rbtree if - * the logging code has pinned it. + /* + * If we found a partial bit of our free space in a + * bitmap but then couldn't find the other part this may + * be a problem, so WARN about it. */ + WARN_ON(re_search); goto out_lock; } } + re_search = false; if (!info->bitmap) { unlink_free_space(ctl, info); if (offset == info->offset) { @@ -1947,8 +1937,10 @@ again: } ret = remove_from_bitmap(ctl, info, &offset, &bytes); - if (ret == -EAGAIN) + if (ret == -EAGAIN) { + re_search = true; goto again; + } BUG_ON(ret); /* logic error */ out_lock: spin_unlock(&ctl->tree_lock); @@ -2298,10 +2290,10 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group, unsigned long total_found = 0; int ret; - i = offset_to_bit(entry->offset, block_group->sectorsize, + i = offset_to_bit(entry->offset, ctl->unit, max_t(u64, offset, entry->offset)); - want_bits = bytes_to_bits(bytes, block_group->sectorsize); - min_bits = bytes_to_bits(min_bytes, block_group->sectorsize); + want_bits = bytes_to_bits(bytes, ctl->unit); + min_bits = bytes_to_bits(min_bytes, ctl->unit); again: found_bits = 0; @@ -2325,23 +2317,22 @@ again: total_found += found_bits; - if (cluster->max_size < found_bits * block_group->sectorsize) - cluster->max_size = found_bits * block_group->sectorsize; + if (cluster->max_size < found_bits * ctl->unit) + cluster->max_size = found_bits * ctl->unit; if (total_found < want_bits || cluster->max_size < cont1_bytes) { i = next_zero + 1; goto again; } - cluster->window_start = start * block_group->sectorsize + - entry->offset; + cluster->window_start = start * ctl->unit + entry->offset; rb_erase(&entry->offset_index, &ctl->free_space_offset); ret = tree_insert_offset(&cluster->root, entry->offset, &entry->offset_index, 1); BUG_ON(ret); /* -EEXIST; Logic error */ trace_btrfs_setup_cluster(block_group, cluster, - total_found * block_group->sectorsize, 1); + total_found * ctl->unit, 1); return 0; } diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c index b1a1c929ba8..d26f67a59e3 100644 --- a/fs/btrfs/inode-map.c +++ b/fs/btrfs/inode-map.c @@ -434,8 +434,9 @@ int btrfs_save_ino_cache(struct btrfs_root *root, * 3 items for pre-allocation */ trans->bytes_reserved = btrfs_calc_trans_metadata_size(root, 8); - ret = btrfs_block_rsv_add_noflush(root, trans->block_rsv, - trans->bytes_reserved); + ret = btrfs_block_rsv_add(root, trans->block_rsv, + trans->bytes_reserved, + BTRFS_RESERVE_NO_FLUSH); if (ret) goto out; trace_btrfs_space_reservation(root->fs_info, "ino_cache", diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 95542a1b3df..cc93b23ca35 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -71,6 +71,7 @@ static const struct file_operations btrfs_dir_file_operations; static struct extent_io_ops btrfs_extent_io_ops; static struct kmem_cache *btrfs_inode_cachep; +static struct kmem_cache *btrfs_delalloc_work_cachep; struct kmem_cache *btrfs_trans_handle_cachep; struct kmem_cache *btrfs_transaction_cachep; struct kmem_cache *btrfs_path_cachep; @@ -87,13 +88,17 @@ static unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = { [S_IFLNK >> S_SHIFT] = BTRFS_FT_SYMLINK, }; -static int btrfs_setsize(struct inode *inode, loff_t newsize); +static int btrfs_setsize(struct inode *inode, struct iattr *attr); static int btrfs_truncate(struct inode *inode); static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent); static noinline int cow_file_range(struct inode *inode, struct page *locked_page, u64 start, u64 end, int *page_started, unsigned long *nr_written, int unlock); +static struct extent_map *create_pinned_em(struct inode *inode, u64 start, + u64 len, u64 orig_start, + u64 block_start, u64 block_len, + u64 orig_block_len, int type); static int btrfs_init_inode_security(struct btrfs_trans_handle *trans, struct inode *inode, struct inode *dir, @@ -698,14 +703,19 @@ retry: em->block_start = ins.objectid; em->block_len = ins.offset; + em->orig_block_len = ins.offset; em->bdev = root->fs_info->fs_devices->latest_bdev; em->compress_type = async_extent->compress_type; set_bit(EXTENT_FLAG_PINNED, &em->flags); set_bit(EXTENT_FLAG_COMPRESSED, &em->flags); + em->generation = -1; while (1) { write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); + if (!ret) + list_move(&em->list, + &em_tree->modified_extents); write_unlock(&em_tree->lock); if (ret != -EEXIST) { free_extent_map(em); @@ -803,14 +813,14 @@ static u64 get_extent_allocation_hint(struct inode *inode, u64 start, * required to start IO on it. It may be clean and already done with * IO when we return. */ -static noinline int cow_file_range(struct inode *inode, - struct page *locked_page, - u64 start, u64 end, int *page_started, - unsigned long *nr_written, - int unlock) +static noinline int __cow_file_range(struct btrfs_trans_handle *trans, + struct inode *inode, + struct btrfs_root *root, + struct page *locked_page, + u64 start, u64 end, int *page_started, + unsigned long *nr_written, + int unlock) { - struct btrfs_root *root = BTRFS_I(inode)->root; - struct btrfs_trans_handle *trans; u64 alloc_hint = 0; u64 num_bytes; unsigned long ram_size; @@ -823,25 +833,10 @@ static noinline int cow_file_range(struct inode *inode, int ret = 0; BUG_ON(btrfs_is_free_space_inode(inode)); - trans = btrfs_join_transaction(root); - if (IS_ERR(trans)) { - extent_clear_unlock_delalloc(inode, - &BTRFS_I(inode)->io_tree, - start, end, locked_page, - EXTENT_CLEAR_UNLOCK_PAGE | - EXTENT_CLEAR_UNLOCK | - EXTENT_CLEAR_DELALLOC | - EXTENT_CLEAR_DIRTY | - EXTENT_SET_WRITEBACK | - EXTENT_END_WRITEBACK); - return PTR_ERR(trans); - } - trans->block_rsv = &root->fs_info->delalloc_block_rsv; num_bytes = (end - start + blocksize) & ~(blocksize - 1); num_bytes = max(blocksize, num_bytes); disk_num_bytes = num_bytes; - ret = 0; /* if this is a small write inside eof, kick off defrag */ if (num_bytes < 64 * 1024 && @@ -900,12 +895,17 @@ static noinline int cow_file_range(struct inode *inode, em->block_start = ins.objectid; em->block_len = ins.offset; + em->orig_block_len = ins.offset; em->bdev = root->fs_info->fs_devices->latest_bdev; set_bit(EXTENT_FLAG_PINNED, &em->flags); + em->generation = -1; while (1) { write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); + if (!ret) + list_move(&em->list, + &em_tree->modified_extents); write_unlock(&em_tree->lock); if (ret != -EEXIST) { free_extent_map(em); @@ -952,11 +952,9 @@ static noinline int cow_file_range(struct inode *inode, alloc_hint = ins.objectid + ins.offset; start += cur_alloc_size; } - ret = 0; out: - btrfs_end_transaction(trans, root); - return ret; + out_unlock: extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree, @@ -971,6 +969,39 @@ out_unlock: goto out; } +static noinline int cow_file_range(struct inode *inode, + struct page *locked_page, + u64 start, u64 end, int *page_started, + unsigned long *nr_written, + int unlock) +{ + struct btrfs_trans_handle *trans; + struct btrfs_root *root = BTRFS_I(inode)->root; + int ret; + + trans = btrfs_join_transaction(root); + if (IS_ERR(trans)) { + extent_clear_unlock_delalloc(inode, + &BTRFS_I(inode)->io_tree, + start, end, locked_page, + EXTENT_CLEAR_UNLOCK_PAGE | + EXTENT_CLEAR_UNLOCK | + EXTENT_CLEAR_DELALLOC | + EXTENT_CLEAR_DIRTY | + EXTENT_SET_WRITEBACK | + EXTENT_END_WRITEBACK); + return PTR_ERR(trans); + } + trans->block_rsv = &root->fs_info->delalloc_block_rsv; + + ret = __cow_file_range(trans, inode, root, locked_page, start, end, + page_started, nr_written, unlock); + + btrfs_end_transaction(trans, root); + + return ret; +} + /* * work queue call back to started compression on a file and pages */ @@ -1126,6 +1157,7 @@ static noinline int run_delalloc_nocow(struct inode *inode, u64 extent_offset; u64 disk_bytenr; u64 num_bytes; + u64 disk_num_bytes; int extent_type; int ret, err; int type; @@ -1228,6 +1260,8 @@ next_slot: extent_offset = btrfs_file_extent_offset(leaf, fi); extent_end = found_key.offset + btrfs_file_extent_num_bytes(leaf, fi); + disk_num_bytes = + btrfs_file_extent_disk_num_bytes(leaf, fi); if (extent_end <= start) { path->slots[0]++; goto next_slot; @@ -1281,9 +1315,9 @@ out_check: btrfs_release_path(path); if (cow_start != (u64)-1) { - ret = cow_file_range(inode, locked_page, cow_start, - found_key.offset - 1, page_started, - nr_written, 1); + ret = __cow_file_range(trans, inode, root, locked_page, + cow_start, found_key.offset - 1, + page_started, nr_written, 1); if (ret) { btrfs_abort_transaction(trans, root, ret); goto error; @@ -1298,16 +1332,21 @@ out_check: em = alloc_extent_map(); BUG_ON(!em); /* -ENOMEM */ em->start = cur_offset; - em->orig_start = em->start; + em->orig_start = found_key.offset - extent_offset; em->len = num_bytes; em->block_len = num_bytes; em->block_start = disk_bytenr; + em->orig_block_len = disk_num_bytes; em->bdev = root->fs_info->fs_devices->latest_bdev; set_bit(EXTENT_FLAG_PINNED, &em->flags); - set_bit(EXTENT_FLAG_PREALLOC, &em->flags); + set_bit(EXTENT_FLAG_FILLING, &em->flags); + em->generation = -1; while (1) { write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); + if (!ret) + list_move(&em->list, + &em_tree->modified_extents); write_unlock(&em_tree->lock); if (ret != -EEXIST) { free_extent_map(em); @@ -1352,8 +1391,9 @@ out_check: } if (cow_start != (u64)-1) { - ret = cow_file_range(inode, locked_page, cow_start, end, - page_started, nr_written, 1); + ret = __cow_file_range(trans, inode, root, locked_page, + cow_start, end, + page_started, nr_written, 1); if (ret) { btrfs_abort_transaction(trans, root, ret); goto error; @@ -1531,7 +1571,6 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset, unsigned long bio_flags) { struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; - struct btrfs_mapping_tree *map_tree; u64 logical = (u64)bio->bi_sector << 9; u64 length = 0; u64 map_length; @@ -1541,11 +1580,10 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset, return 0; length = bio->bi_size; - map_tree = &root->fs_info->mapping_tree; map_length = length; - ret = btrfs_map_block(map_tree, READ, logical, + ret = btrfs_map_block(root->fs_info, READ, logical, &map_length, NULL, 0); - /* Will always return 0 or 1 with map_multi == NULL */ + /* Will always return 0 with map_multi == NULL */ BUG_ON(ret < 0); if (map_length < length + size) return 1; @@ -1586,7 +1624,12 @@ static int __btrfs_submit_bio_done(struct inode *inode, int rw, struct bio *bio, u64 bio_offset) { struct btrfs_root *root = BTRFS_I(inode)->root; - return btrfs_map_bio(root, rw, bio, mirror_num, 1); + int ret; + + ret = btrfs_map_bio(root, rw, bio, mirror_num, 1); + if (ret) + bio_endio(bio, ret); + return ret; } /* @@ -1601,6 +1644,7 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, int ret = 0; int skip_sum; int metadata = 0; + int async = !atomic_read(&BTRFS_I(inode)->sync_writers); skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM; @@ -1610,31 +1654,43 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, if (!(rw & REQ_WRITE)) { ret = btrfs_bio_wq_end_io(root->fs_info, bio, metadata); if (ret) - return ret; + goto out; if (bio_flags & EXTENT_BIO_COMPRESSED) { - return btrfs_submit_compressed_read(inode, bio, - mirror_num, bio_flags); + ret = btrfs_submit_compressed_read(inode, bio, + mirror_num, + bio_flags); + goto out; } else if (!skip_sum) { ret = btrfs_lookup_bio_sums(root, inode, bio, NULL); if (ret) - return ret; + goto out; } goto mapit; - } else if (!skip_sum) { + } else if (async && !skip_sum) { /* csum items have already been cloned */ if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID) goto mapit; /* we're doing a write, do the async checksumming */ - return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, + ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, inode, rw, bio, mirror_num, bio_flags, bio_offset, __btrfs_submit_bio_start, __btrfs_submit_bio_done); + goto out; + } else if (!skip_sum) { + ret = btrfs_csum_one_bio(root, inode, bio, 0, 0); + if (ret) + goto out; } mapit: - return btrfs_map_bio(root, rw, bio, mirror_num, 0); + ret = btrfs_map_bio(root, rw, bio, mirror_num, 0); + +out: + if (ret < 0) + bio_endio(bio, ret); + return ret; } /* @@ -1657,8 +1713,7 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans, int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, struct extent_state **cached_state) { - if ((end & (PAGE_CACHE_SIZE - 1)) == 0) - WARN_ON(1); + WARN_ON((end & (PAGE_CACHE_SIZE - 1)) == 0); return set_extent_delalloc(&BTRFS_I(inode)->io_tree, start, end, cached_state, GFP_NOFS); } @@ -1867,22 +1922,20 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent) if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) { BUG_ON(!list_empty(&ordered_extent->list)); /* Logic error */ - ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent); - if (!ret) { - if (nolock) - trans = btrfs_join_transaction_nolock(root); - else - trans = btrfs_join_transaction(root); - if (IS_ERR(trans)) { - ret = PTR_ERR(trans); - trans = NULL; - goto out; - } - trans->block_rsv = &root->fs_info->delalloc_block_rsv; - ret = btrfs_update_inode_fallback(trans, root, inode); - if (ret) /* -ENOMEM or corruption */ - btrfs_abort_transaction(trans, root, ret); + btrfs_ordered_update_i_size(inode, 0, ordered_extent); + if (nolock) + trans = btrfs_join_transaction_nolock(root); + else + trans = btrfs_join_transaction(root); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + trans = NULL; + goto out; } + trans->block_rsv = &root->fs_info->delalloc_block_rsv; + ret = btrfs_update_inode_fallback(trans, root, inode); + if (ret) /* -ENOMEM or corruption */ + btrfs_abort_transaction(trans, root, ret); goto out; } @@ -1931,15 +1984,11 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent) add_pending_csums(trans, inode, ordered_extent->file_offset, &ordered_extent->list); - ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent); - if (!ret || !test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) { - ret = btrfs_update_inode_fallback(trans, root, inode); - if (ret) { /* -ENOMEM or corruption */ - btrfs_abort_transaction(trans, root, ret); - goto out_unlock; - } - } else { - btrfs_set_inode_last_trans(trans, inode); + btrfs_ordered_update_i_size(inode, 0, ordered_extent); + ret = btrfs_update_inode_fallback(trans, root, inode); + if (ret) { /* -ENOMEM or corruption */ + btrfs_abort_transaction(trans, root, ret); + goto out_unlock; } ret = 0; out_unlock: @@ -2429,6 +2478,18 @@ int btrfs_orphan_cleanup(struct btrfs_root *root) continue; } nr_truncate++; + + /* 1 for the orphan item deletion. */ + trans = btrfs_start_transaction(root, 1); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + goto out; + } + ret = btrfs_orphan_add(trans, inode); + btrfs_end_transaction(trans, root); + if (ret) + goto out; + ret = btrfs_truncate(inode); } else { nr_unlink++; @@ -3074,7 +3135,6 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry) struct btrfs_trans_handle *trans; struct inode *inode = dentry->d_inode; int ret; - unsigned long nr = 0; trans = __unlink_start_trans(dir, dentry); if (IS_ERR(trans)) @@ -3094,9 +3154,8 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry) } out: - nr = trans->blocks_used; __unlink_end_trans(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); return ret; } @@ -3186,7 +3245,6 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) int err = 0; struct btrfs_root *root = BTRFS_I(dir)->root; struct btrfs_trans_handle *trans; - unsigned long nr = 0; if (inode->i_size > BTRFS_EMPTY_DIR_SIZE) return -ENOTEMPTY; @@ -3215,9 +3273,8 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) if (!err) btrfs_i_size_write(inode, 0); out: - nr = trans->blocks_used; __unlink_end_trans(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); return err; } @@ -3497,11 +3554,11 @@ int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len, if (ret) goto out; - ret = -ENOMEM; again: page = find_or_create_page(mapping, index, mask); if (!page) { btrfs_delalloc_release_space(inode, PAGE_CACHE_SIZE); + ret = -ENOMEM; goto out; } @@ -3550,7 +3607,6 @@ again: goto out_unlock; } - ret = 0; if (offset != PAGE_CACHE_SIZE) { if (!len) len = PAGE_CACHE_SIZE - offset; @@ -3621,6 +3677,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) block_end - cur_offset, 0); if (IS_ERR(em)) { err = PTR_ERR(em); + em = NULL; break; } last_byte = min(extent_map_end(em), block_end); @@ -3668,6 +3725,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) hole_em->block_start = EXTENT_MAP_HOLE; hole_em->block_len = 0; + hole_em->orig_block_len = 0; hole_em->bdev = root->fs_info->fs_devices->latest_bdev; hole_em->compress_type = BTRFS_COMPRESS_NONE; hole_em->generation = trans->transid; @@ -3703,16 +3761,27 @@ next: return err; } -static int btrfs_setsize(struct inode *inode, loff_t newsize) +static int btrfs_setsize(struct inode *inode, struct iattr *attr) { struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; loff_t oldsize = i_size_read(inode); + loff_t newsize = attr->ia_size; + int mask = attr->ia_valid; int ret; if (newsize == oldsize) return 0; + /* + * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a + * special case where we need to update the times despite not having + * these flags set. For all other operations the VFS set these flags + * explicitly if it wants a timestamp update. + */ + if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME)))) + inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb); + if (newsize > oldsize) { truncate_pagecache(inode, oldsize, newsize); ret = btrfs_cont_expand(inode, oldsize, newsize); @@ -3738,9 +3807,34 @@ static int btrfs_setsize(struct inode *inode, loff_t newsize) set_bit(BTRFS_INODE_ORDERED_DATA_CLOSE, &BTRFS_I(inode)->runtime_flags); + /* + * 1 for the orphan item we're going to add + * 1 for the orphan item deletion. + */ + trans = btrfs_start_transaction(root, 2); + if (IS_ERR(trans)) + return PTR_ERR(trans); + + /* + * We need to do this in case we fail at _any_ point during the + * actual truncate. Once we do the truncate_setsize we could + * invalidate pages which forces any outstanding ordered io to + * be instantly completed which will give us extents that need + * to be truncated. If we fail to get an orphan inode down we + * could have left over extents that were never meant to live, + * so we need to garuntee from this point on that everything + * will be consistent. + */ + ret = btrfs_orphan_add(trans, inode); + btrfs_end_transaction(trans, root); + if (ret) + return ret; + /* we don't support swapfiles, so vmtruncate shouldn't fail */ truncate_setsize(inode, newsize); ret = btrfs_truncate(inode); + if (ret && inode->i_nlink) + btrfs_orphan_del(NULL, inode); } return ret; @@ -3760,7 +3854,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr) return err; if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)) { - err = btrfs_setsize(inode, attr->ia_size); + err = btrfs_setsize(inode, attr); if (err) return err; } @@ -3783,7 +3877,6 @@ void btrfs_evict_inode(struct inode *inode) struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_block_rsv *rsv, *global_rsv; u64 min_size = btrfs_calc_trunc_metadata_size(root, 1); - unsigned long nr; int ret; trace_btrfs_inode_evict(inode); @@ -3829,7 +3922,8 @@ void btrfs_evict_inode(struct inode *inode) * inode item when doing the truncate. */ while (1) { - ret = btrfs_block_rsv_refill_noflush(root, rsv, min_size); + ret = btrfs_block_rsv_refill(root, rsv, min_size, + BTRFS_RESERVE_FLUSH_LIMIT); /* * Try and steal from the global reserve since we will @@ -3847,7 +3941,7 @@ void btrfs_evict_inode(struct inode *inode) goto no_delete; } - trans = btrfs_start_transaction_noflush(root, 1); + trans = btrfs_start_transaction_lflush(root, 1); if (IS_ERR(trans)) { btrfs_orphan_del(NULL, inode); btrfs_free_block_rsv(root, rsv); @@ -3864,10 +3958,9 @@ void btrfs_evict_inode(struct inode *inode) ret = btrfs_update_inode(trans, root, inode); BUG_ON(ret); - nr = trans->blocks_used; btrfs_end_transaction(trans, root); trans = NULL; - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); } btrfs_free_block_rsv(root, rsv); @@ -3883,9 +3976,8 @@ void btrfs_evict_inode(struct inode *inode) root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID)) btrfs_return_ino(root, btrfs_ino(inode)); - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); no_delete: clear_inode(inode); return; @@ -4219,16 +4311,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry) if (dentry->d_name.len > BTRFS_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); - if (unlikely(d_need_lookup(dentry))) { - memcpy(&location, dentry->d_fsdata, sizeof(struct btrfs_key)); - kfree(dentry->d_fsdata); - dentry->d_fsdata = NULL; - /* This thing is hashed, drop it for now */ - d_drop(dentry); - } else { - ret = btrfs_inode_by_name(dir, dentry, &location); - } - + ret = btrfs_inode_by_name(dir, dentry, &location); if (ret < 0) return ERR_PTR(ret); @@ -4298,11 +4381,6 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry, struct dentry *ret; ret = d_splice_alias(btrfs_lookup_dentry(dir, dentry), dentry); - if (unlikely(d_need_lookup(dentry))) { - spin_lock(&dentry->d_lock); - dentry->d_flags &= ~DCACHE_NEED_LOOKUP; - spin_unlock(&dentry->d_lock); - } return ret; } @@ -4775,8 +4853,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, if (S_ISREG(mode)) { if (btrfs_test_opt(root, NODATASUM)) BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM; - if (btrfs_test_opt(root, NODATACOW) || - (BTRFS_I(dir)->flags & BTRFS_INODE_NODATACOW)) + if (btrfs_test_opt(root, NODATACOW)) BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW; } @@ -4842,7 +4919,7 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, ret = btrfs_insert_dir_item(trans, root, name, name_len, parent_inode, &key, btrfs_inode_type(inode), index); - if (ret == -EEXIST) + if (ret == -EEXIST || ret == -EOVERFLOW) goto fail_dir_item; else if (ret) { btrfs_abort_transaction(trans, root, ret); @@ -4897,7 +4974,6 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, int err; int drop_inode = 0; u64 objectid; - unsigned long nr = 0; u64 index = 0; if (!new_valid_dev(rdev)) @@ -4930,6 +5006,12 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, goto out_unlock; } + err = btrfs_update_inode(trans, root, inode); + if (err) { + drop_inode = 1; + goto out_unlock; + } + /* * If the active LSM wants to access the inode during * d_instantiate it needs these. Smack checks to see @@ -4947,9 +5029,8 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, d_instantiate(dentry, inode); } out_unlock: - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); if (drop_inode) { inode_dec_link_count(inode); iput(inode); @@ -4963,9 +5044,8 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, struct btrfs_trans_handle *trans; struct btrfs_root *root = BTRFS_I(dir)->root; struct inode *inode = NULL; - int drop_inode = 0; + int drop_inode_on_err = 0; int err; - unsigned long nr = 0; u64 objectid; u64 index = 0; @@ -4989,12 +5069,15 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, err = PTR_ERR(inode); goto out_unlock; } + drop_inode_on_err = 1; err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name); - if (err) { - drop_inode = 1; + if (err) + goto out_unlock; + + err = btrfs_update_inode(trans, root, inode); + if (err) goto out_unlock; - } /* * If the active LSM wants to access the inode during @@ -5007,21 +5090,20 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index); if (err) - drop_inode = 1; - else { - inode->i_mapping->a_ops = &btrfs_aops; - inode->i_mapping->backing_dev_info = &root->fs_info->bdi; - BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops; - d_instantiate(dentry, inode); - } + goto out_unlock; + + inode->i_mapping->a_ops = &btrfs_aops; + inode->i_mapping->backing_dev_info = &root->fs_info->bdi; + BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops; + d_instantiate(dentry, inode); + out_unlock: - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - if (drop_inode) { + if (err && drop_inode_on_err) { inode_dec_link_count(inode); iput(inode); } - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); return err; } @@ -5032,7 +5114,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, struct btrfs_root *root = BTRFS_I(dir)->root; struct inode *inode = old_dentry->d_inode; u64 index; - unsigned long nr = 0; int err; int drop_inode = 0; @@ -5062,6 +5143,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, inode_inc_iversion(inode); inode->i_ctime = CURRENT_TIME; ihold(inode); + set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags); err = btrfs_add_nondir(trans, dir, dentry, inode, 1, index); @@ -5076,14 +5158,13 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, btrfs_log_new_name(trans, inode, NULL, parent); } - nr = trans->blocks_used; btrfs_end_transaction(trans, root); fail: if (drop_inode) { inode_dec_link_count(inode); iput(inode); } - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); return err; } @@ -5096,7 +5177,6 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) int drop_on_err = 0; u64 objectid = 0; u64 index = 0; - unsigned long nr = 1; /* * 2 items for inode and ref @@ -5142,11 +5222,10 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) drop_on_err = 0; out_fail: - nr = trans->blocks_used; btrfs_end_transaction(trans, root); if (drop_on_err) iput(inode); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); return err; } @@ -5340,6 +5419,7 @@ again: if (start + len <= found_key.offset) goto not_found; em->start = start; + em->orig_start = start; em->len = found_key.offset - start; goto not_found_em; } @@ -5350,6 +5430,8 @@ again: em->len = extent_end - extent_start; em->orig_start = extent_start - btrfs_file_extent_offset(leaf, item); + em->orig_block_len = btrfs_file_extent_disk_num_bytes(leaf, + item); bytenr = btrfs_file_extent_disk_bytenr(leaf, item); if (bytenr == 0) { em->block_start = EXTENT_MAP_HOLE; @@ -5359,8 +5441,7 @@ again: set_bit(EXTENT_FLAG_COMPRESSED, &em->flags); em->compress_type = compress_type; em->block_start = bytenr; - em->block_len = btrfs_file_extent_disk_num_bytes(leaf, - item); + em->block_len = em->orig_block_len; } else { bytenr += btrfs_file_extent_offset(leaf, item); em->block_start = bytenr; @@ -5390,7 +5471,8 @@ again: em->start = extent_start + extent_offset; em->len = (copy_size + root->sectorsize - 1) & ~((u64)root->sectorsize - 1); - em->orig_start = EXTENT_MAP_INLINE; + em->orig_block_len = em->len; + em->orig_start = em->start; if (compress_type) { set_bit(EXTENT_FLAG_COMPRESSED, &em->flags); em->compress_type = compress_type; @@ -5439,11 +5521,11 @@ again: extent_map_end(em) - 1, NULL, GFP_NOFS); goto insert; } else { - printk(KERN_ERR "btrfs unknown found_type %d\n", found_type); - WARN_ON(1); + WARN(1, KERN_ERR "btrfs unknown found_type %d\n", found_type); } not_found: em->start = start; + em->orig_start = start; em->len = len; not_found_em: em->block_start = EXTENT_MAP_HOLE; @@ -5539,10 +5621,13 @@ struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *pag return em; if (em) { /* - * if our em maps to a hole, there might - * actually be delalloc bytes behind it + * if our em maps to + * - a hole or + * - a pre-alloc extent, + * there might actually be delalloc bytes behind it. */ - if (em->block_start != EXTENT_MAP_HOLE) + if (em->block_start != EXTENT_MAP_HOLE && + !test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) return em; else hole_em = em; @@ -5624,6 +5709,8 @@ struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *pag */ em->block_start = hole_em->block_start; em->block_len = hole_len; + if (test_bit(EXTENT_FLAG_PREALLOC, &hole_em->flags)) + set_bit(EXTENT_FLAG_PREALLOC, &em->flags); } else { em->start = range_start; em->len = found; @@ -5645,38 +5732,19 @@ out: } static struct extent_map *btrfs_new_extent_direct(struct inode *inode, - struct extent_map *em, u64 start, u64 len) { struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; - struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; + struct extent_map *em; struct btrfs_key ins; u64 alloc_hint; int ret; - bool insert = false; - - /* - * Ok if the extent map we looked up is a hole and is for the exact - * range we want, there is no reason to allocate a new one, however if - * it is not right then we need to free this one and drop the cache for - * our range. - */ - if (em->block_start != EXTENT_MAP_HOLE || em->start != start || - em->len != len) { - free_extent_map(em); - em = NULL; - insert = true; - btrfs_drop_extent_cache(inode, start, start + len - 1, 0); - } trans = btrfs_join_transaction(root); if (IS_ERR(trans)) return ERR_CAST(trans); - if (start <= BTRFS_I(inode)->disk_i_size && len < 64 * 1024) - btrfs_add_inode_defrag(trans, inode); - trans->block_rsv = &root->fs_info->delalloc_block_rsv; alloc_hint = get_extent_allocation_hint(inode, start, len); @@ -5687,37 +5755,10 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode, goto out; } - if (!em) { - em = alloc_extent_map(); - if (!em) { - em = ERR_PTR(-ENOMEM); - goto out; - } - } - - em->start = start; - em->orig_start = em->start; - em->len = ins.offset; - - em->block_start = ins.objectid; - em->block_len = ins.offset; - em->bdev = root->fs_info->fs_devices->latest_bdev; - - /* - * We need to do this because if we're using the original em we searched - * for, we could have EXTENT_FLAG_VACANCY set, and we don't want that. - */ - em->flags = 0; - set_bit(EXTENT_FLAG_PINNED, &em->flags); - - while (insert) { - write_lock(&em_tree->lock); - ret = add_extent_mapping(em_tree, em); - write_unlock(&em_tree->lock); - if (ret != -EEXIST) - break; - btrfs_drop_extent_cache(inode, start, start + em->len - 1, 0); - } + em = create_pinned_em(inode, start, ins.offset, start, ins.objectid, + ins.offset, ins.offset, 0); + if (IS_ERR(em)) + goto out; ret = btrfs_add_ordered_extent_dio(inode, start, ins.objectid, ins.offset, ins.offset, 0); @@ -5894,7 +5935,7 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend, static struct extent_map *create_pinned_em(struct inode *inode, u64 start, u64 len, u64 orig_start, u64 block_start, u64 block_len, - int type) + u64 orig_block_len, int type) { struct extent_map_tree *em_tree; struct extent_map *em; @@ -5912,15 +5953,20 @@ static struct extent_map *create_pinned_em(struct inode *inode, u64 start, em->block_len = block_len; em->block_start = block_start; em->bdev = root->fs_info->fs_devices->latest_bdev; + em->orig_block_len = orig_block_len; + em->generation = -1; set_bit(EXTENT_FLAG_PINNED, &em->flags); if (type == BTRFS_ORDERED_PREALLOC) - set_bit(EXTENT_FLAG_PREALLOC, &em->flags); + set_bit(EXTENT_FLAG_FILLING, &em->flags); do { btrfs_drop_extent_cache(inode, em->start, em->start + em->len - 1, 0); write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); + if (!ret) + list_move(&em->list, + &em_tree->modified_extents); write_unlock(&em_tree->lock); } while (ret == -EEXIST); @@ -6047,13 +6093,15 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, goto must_cow; if (can_nocow_odirect(trans, inode, start, len) == 1) { - u64 orig_start = em->start; + u64 orig_start = em->orig_start; + u64 orig_block_len = em->orig_block_len; if (type == BTRFS_ORDERED_PREALLOC) { free_extent_map(em); em = create_pinned_em(inode, start, len, orig_start, - block_start, len, type); + block_start, len, + orig_block_len, type); if (IS_ERR(em)) { btrfs_end_transaction(trans, root); goto unlock_err; @@ -6077,7 +6125,8 @@ must_cow: * it above */ len = bh_result->b_size; - em = btrfs_new_extent_direct(inode, em, start, len); + free_extent_map(em); + em = btrfs_new_extent_direct(inode, start, len); if (IS_ERR(em)) { ret = PTR_ERR(em); goto unlock_err; @@ -6318,6 +6367,9 @@ static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode, struct btrfs_root *root = BTRFS_I(inode)->root; int ret; + if (async_submit) + async_submit = !atomic_read(&BTRFS_I(inode)->sync_writers); + bio_get(bio); if (!write) { @@ -6362,7 +6414,6 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, { struct inode *inode = dip->inode; struct btrfs_root *root = BTRFS_I(inode)->root; - struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree; struct bio *bio; struct bio *orig_bio = dip->orig_bio; struct bio_vec *bvec = orig_bio->bi_io_vec; @@ -6375,7 +6426,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, int async_submit = 0; map_length = orig_bio->bi_size; - ret = btrfs_map_block(map_tree, READ, start_sector << 9, + ret = btrfs_map_block(root->fs_info, READ, start_sector << 9, &map_length, NULL, 0); if (ret) { bio_put(orig_bio); @@ -6429,7 +6480,8 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, bio->bi_end_io = btrfs_end_dio_bio; map_length = orig_bio->bi_size; - ret = btrfs_map_block(map_tree, READ, start_sector << 9, + ret = btrfs_map_block(root->fs_info, READ, + start_sector << 9, &map_length, NULL, 0); if (ret) { bio_put(bio); @@ -6582,9 +6634,17 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb, btrfs_submit_direct, 0); } +#define BTRFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC) + static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len) { + int ret; + + ret = fiemap_check_flags(fieinfo, BTRFS_FIEMAP_FLAGS); + if (ret) + return ret; + return extent_fiemap(inode, fieinfo, start, len, btrfs_get_extent_fiemap); } @@ -6855,7 +6915,6 @@ static int btrfs_truncate(struct inode *inode) int ret; int err = 0; struct btrfs_trans_handle *trans; - unsigned long nr; u64 mask = root->sectorsize - 1; u64 min_size = btrfs_calc_trunc_metadata_size(root, 1); @@ -6910,11 +6969,9 @@ static int btrfs_truncate(struct inode *inode) /* * 1 for the truncate slack space - * 1 for the orphan item we're going to add - * 1 for the orphan item deletion * 1 for updating the inode. */ - trans = btrfs_start_transaction(root, 4); + trans = btrfs_start_transaction(root, 2); if (IS_ERR(trans)) { err = PTR_ERR(trans); goto out; @@ -6925,12 +6982,6 @@ static int btrfs_truncate(struct inode *inode) min_size); BUG_ON(ret); - ret = btrfs_orphan_add(trans, inode); - if (ret) { - btrfs_end_transaction(trans, root); - goto out; - } - /* * setattr is responsible for setting the ordered_data_close flag, * but that is only tested during the last file release. That @@ -6978,9 +7029,8 @@ static int btrfs_truncate(struct inode *inode) break; } - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); trans = btrfs_start_transaction(root, 2); if (IS_ERR(trans)) { @@ -7000,12 +7050,6 @@ static int btrfs_truncate(struct inode *inode) ret = btrfs_orphan_del(trans, inode); if (ret) err = ret; - } else if (ret && inode->i_nlink > 0) { - /* - * Failed to do the truncate, remove us from the in memory - * orphan list. - */ - ret = btrfs_orphan_del(NULL, inode); } if (trans) { @@ -7014,9 +7058,8 @@ static int btrfs_truncate(struct inode *inode) if (ret && !err) err = ret; - nr = trans->blocks_used; ret = btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); } out: @@ -7093,6 +7136,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) extent_io_tree_init(&ei->io_failure_tree, &inode->i_data); ei->io_tree.track_uptodate = 1; ei->io_failure_tree.track_uptodate = 1; + atomic_set(&ei->sync_writers, 0); mutex_init(&ei->log_mutex); mutex_init(&ei->delalloc_mutex); btrfs_ordered_inode_tree_init(&ei->ordered_tree); @@ -7203,6 +7247,8 @@ void btrfs_destroy_cachep(void) kmem_cache_destroy(btrfs_path_cachep); if (btrfs_free_space_cachep) kmem_cache_destroy(btrfs_free_space_cachep); + if (btrfs_delalloc_work_cachep) + kmem_cache_destroy(btrfs_delalloc_work_cachep); } int btrfs_init_cachep(void) @@ -7237,6 +7283,13 @@ int btrfs_init_cachep(void) if (!btrfs_free_space_cachep) goto fail; + btrfs_delalloc_work_cachep = kmem_cache_create("btrfs_delalloc_work", + sizeof(struct btrfs_delalloc_work), 0, + SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, + NULL); + if (!btrfs_delalloc_work_cachep) + goto fail; + return 0; fail: btrfs_destroy_cachep(); @@ -7308,6 +7361,28 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry, if (S_ISDIR(old_inode->i_mode) && new_inode && new_inode->i_size > BTRFS_EMPTY_DIR_SIZE) return -ENOTEMPTY; + + + /* check for collisions, even if the name isn't there */ + ret = btrfs_check_dir_item_collision(root, new_dir->i_ino, + new_dentry->d_name.name, + new_dentry->d_name.len); + + if (ret) { + if (ret == -EEXIST) { + /* we shouldn't get + * eexist without a new_inode */ + if (!new_inode) { + WARN_ON(1); + return ret; + } + } else { + /* maybe -EOVERFLOW */ + return ret; + } + } + ret = 0; + /* * we're using rename to replace one file with another. * and the replacement file is large. Start IO on it now so @@ -7447,39 +7522,110 @@ out_notrans: return ret; } +static void btrfs_run_delalloc_work(struct btrfs_work *work) +{ + struct btrfs_delalloc_work *delalloc_work; + + delalloc_work = container_of(work, struct btrfs_delalloc_work, + work); + if (delalloc_work->wait) + btrfs_wait_ordered_range(delalloc_work->inode, 0, (u64)-1); + else + filemap_flush(delalloc_work->inode->i_mapping); + + if (delalloc_work->delay_iput) + btrfs_add_delayed_iput(delalloc_work->inode); + else + iput(delalloc_work->inode); + complete(&delalloc_work->completion); +} + +struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, + int wait, int delay_iput) +{ + struct btrfs_delalloc_work *work; + + work = kmem_cache_zalloc(btrfs_delalloc_work_cachep, GFP_NOFS); + if (!work) + return NULL; + + init_completion(&work->completion); + INIT_LIST_HEAD(&work->list); + work->inode = inode; + work->wait = wait; + work->delay_iput = delay_iput; + work->work.func = btrfs_run_delalloc_work; + + return work; +} + +void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work) +{ + wait_for_completion(&work->completion); + kmem_cache_free(btrfs_delalloc_work_cachep, work); +} + /* * some fairly slow code that needs optimization. This walks the list * of all the inodes with pending delalloc and forces them to disk. */ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput) { - struct list_head *head = &root->fs_info->delalloc_inodes; struct btrfs_inode *binode; struct inode *inode; + struct btrfs_delalloc_work *work, *next; + struct list_head works; + struct list_head splice; + int ret = 0; if (root->fs_info->sb->s_flags & MS_RDONLY) return -EROFS; + INIT_LIST_HEAD(&works); + INIT_LIST_HEAD(&splice); +again: spin_lock(&root->fs_info->delalloc_lock); - while (!list_empty(head)) { - binode = list_entry(head->next, struct btrfs_inode, + list_splice_init(&root->fs_info->delalloc_inodes, &splice); + while (!list_empty(&splice)) { + binode = list_entry(splice.next, struct btrfs_inode, delalloc_inodes); + + list_del_init(&binode->delalloc_inodes); + inode = igrab(&binode->vfs_inode); if (!inode) - list_del_init(&binode->delalloc_inodes); + continue; + + list_add_tail(&binode->delalloc_inodes, + &root->fs_info->delalloc_inodes); spin_unlock(&root->fs_info->delalloc_lock); - if (inode) { - filemap_flush(inode->i_mapping); - if (delay_iput) - btrfs_add_delayed_iput(inode); - else - iput(inode); + + work = btrfs_alloc_delalloc_work(inode, 0, delay_iput); + if (unlikely(!work)) { + ret = -ENOMEM; + goto out; } + list_add_tail(&work->list, &works); + btrfs_queue_worker(&root->fs_info->flush_workers, + &work->work); + cond_resched(); spin_lock(&root->fs_info->delalloc_lock); } spin_unlock(&root->fs_info->delalloc_lock); + list_for_each_entry_safe(work, next, &works, list) { + list_del_init(&work->list); + btrfs_wait_and_free_delalloc_work(work); + } + + spin_lock(&root->fs_info->delalloc_lock); + if (!list_empty(&root->fs_info->delalloc_inodes)) { + spin_unlock(&root->fs_info->delalloc_lock); + goto again; + } + spin_unlock(&root->fs_info->delalloc_lock); + /* the filemap_flush will queue IO into the worker threads, but * we have to make sure the IO is actually started and that * ordered extents get created before we return @@ -7493,6 +7639,18 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput) } atomic_dec(&root->fs_info->async_submit_draining); return 0; +out: + list_for_each_entry_safe(work, next, &works, list) { + list_del_init(&work->list); + btrfs_wait_and_free_delalloc_work(work); + } + + if (!list_empty_careful(&splice)) { + spin_lock(&root->fs_info->delalloc_lock); + list_splice_tail(&splice, &root->fs_info->delalloc_inodes); + spin_unlock(&root->fs_info->delalloc_lock); + } + return ret; } static int btrfs_symlink(struct inode *dir, struct dentry *dentry, @@ -7512,7 +7670,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, unsigned long ptr; struct btrfs_file_extent_item *ei; struct extent_buffer *leaf; - unsigned long nr = 0; name_len = strlen(symname) + 1; if (name_len > BTRFS_MAX_INLINE_DATA_SIZE(root)) @@ -7610,13 +7767,12 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, out_unlock: if (!err) d_instantiate(dentry, inode); - nr = trans->blocks_used; btrfs_end_transaction(trans, root); if (drop_inode) { inode_dec_link_count(inode); iput(inode); } - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); return err; } @@ -7679,6 +7835,7 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode, em->len = ins.offset; em->block_start = ins.objectid; em->block_len = ins.offset; + em->orig_block_len = ins.offset; em->bdev = root->fs_info->fs_devices->latest_bdev; set_bit(EXTENT_FLAG_PREALLOC, &em->flags); em->generation = trans->transid; diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 8fcf9a59c28..5b22d45d3c6 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -55,6 +55,7 @@ #include "backref.h" #include "rcu-string.h" #include "send.h" +#include "dev-replace.h" /* Mask out flags that are inappropriate for the given type of inode. */ static inline __u32 btrfs_mask_flags(umode_t mode, __u32 flags) @@ -140,8 +141,11 @@ void btrfs_inherit_iflags(struct inode *inode, struct inode *dir) BTRFS_I(inode)->flags |= BTRFS_INODE_COMPRESS; } - if (flags & BTRFS_INODE_NODATACOW) + if (flags & BTRFS_INODE_NODATACOW) { BTRFS_I(inode)->flags |= BTRFS_INODE_NODATACOW; + if (S_ISREG(inode->i_mode)) + BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM; + } btrfs_update_iflags(inode); } @@ -571,8 +575,12 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry, ret = btrfs_commit_transaction(trans, root->fs_info->extent_root); } - if (ret) + if (ret) { + /* cleanup_transaction has freed this for us */ + if (trans->aborted) + pending_snapshot = NULL; goto fail; + } ret = pending_snapshot->error; if (ret) @@ -705,6 +713,16 @@ static noinline int btrfs_mksubvol(struct path *parent, if (error) goto out_dput; + /* + * even if this name doesn't exist, we may get hash collisions. + * check for them now when we can safely fail + */ + error = btrfs_check_dir_item_collision(BTRFS_I(dir)->root, + dir->i_ino, name, + namelen); + if (error) + goto out_dput; + down_read(&BTRFS_I(dir)->root->fs_info->subvol_sem); if (btrfs_root_refs(&BTRFS_I(dir)->root->root_item) == 0) @@ -1225,7 +1243,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, } defrag_count += ret; - balance_dirty_pages_ratelimited_nr(inode->i_mapping, ret); + balance_dirty_pages_ratelimited(inode->i_mapping); mutex_unlock(&inode->i_mutex); if (newer_than) { @@ -1293,12 +1311,13 @@ out_ra: return ret; } -static noinline int btrfs_ioctl_resize(struct btrfs_root *root, +static noinline int btrfs_ioctl_resize(struct file *file, void __user *arg) { u64 new_size; u64 old_size; u64 devid = 1; + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; struct btrfs_ioctl_vol_args *vol_args; struct btrfs_trans_handle *trans; struct btrfs_device *device = NULL; @@ -1313,13 +1332,18 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root, if (!capable(CAP_SYS_ADMIN)) return -EPERM; - mutex_lock(&root->fs_info->volume_mutex); - if (root->fs_info->balance_ctl) { - printk(KERN_INFO "btrfs: balance in progress\n"); - ret = -EINVAL; - goto out; + ret = mnt_want_write_file(file); + if (ret) + return ret; + + if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running, + 1)) { + pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n"); + mnt_drop_write_file(file); + return -EINVAL; } + mutex_lock(&root->fs_info->volume_mutex); vol_args = memdup_user(arg, sizeof(*vol_args)); if (IS_ERR(vol_args)) { ret = PTR_ERR(vol_args); @@ -1339,16 +1363,18 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root, printk(KERN_INFO "btrfs: resizing devid %llu\n", (unsigned long long)devid); } - device = btrfs_find_device(root, devid, NULL, NULL); + + device = btrfs_find_device(root->fs_info, devid, NULL, NULL); if (!device) { printk(KERN_INFO "btrfs: resizer unable to find device %llu\n", (unsigned long long)devid); ret = -EINVAL; goto out_free; } - if (device->fs_devices && device->fs_devices->seeding) { + + if (!device->writeable) { printk(KERN_INFO "btrfs: resizer unable to apply on " - "seeding device %llu\n", + "readonly device %llu\n", (unsigned long long)devid); ret = -EINVAL; goto out_free; @@ -1371,6 +1397,11 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root, } } + if (device->is_tgtdev_for_dev_replace) { + ret = -EINVAL; + goto out_free; + } + old_size = device->total_bytes; if (mod < 0) { @@ -1409,12 +1440,14 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root, btrfs_commit_transaction(trans, root); } else if (new_size < old_size) { ret = btrfs_shrink_device(device, new_size); - } + } /* equal, nothing need to do */ out_free: kfree(vol_args); out: mutex_unlock(&root->fs_info->volume_mutex); + atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0); + mnt_drop_write_file(file); return ret; } @@ -2065,13 +2098,13 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, err = inode_permission(inode, MAY_WRITE | MAY_EXEC); if (err) goto out_dput; - - /* check if subvolume may be deleted by a non-root user */ - err = btrfs_may_delete(dir, dentry, 1); - if (err) - goto out_dput; } + /* check if subvolume may be deleted by a user */ + err = btrfs_may_delete(dir, dentry, 1); + if (err) + goto out_dput; + if (btrfs_ino(inode) != BTRFS_FIRST_FREE_OBJECTID) { err = -EINVAL; goto out_dput; @@ -2153,13 +2186,22 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp) struct btrfs_ioctl_defrag_range_args *range; int ret; - if (btrfs_root_readonly(root)) - return -EROFS; - ret = mnt_want_write_file(file); if (ret) return ret; + if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running, + 1)) { + pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n"); + mnt_drop_write_file(file); + return -EINVAL; + } + + if (btrfs_root_readonly(root)) { + ret = -EROFS; + goto out; + } + switch (inode->i_mode & S_IFMT) { case S_IFDIR: if (!capable(CAP_SYS_ADMIN)) { @@ -2209,6 +2251,7 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp) ret = -EINVAL; } out: + atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0); mnt_drop_write_file(file); return ret; } @@ -2221,13 +2264,13 @@ static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - mutex_lock(&root->fs_info->volume_mutex); - if (root->fs_info->balance_ctl) { - printk(KERN_INFO "btrfs: balance in progress\n"); - ret = -EINVAL; - goto out; + if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running, + 1)) { + pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n"); + return -EINVAL; } + mutex_lock(&root->fs_info->volume_mutex); vol_args = memdup_user(arg, sizeof(*vol_args)); if (IS_ERR(vol_args)) { ret = PTR_ERR(vol_args); @@ -2240,27 +2283,31 @@ static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg) kfree(vol_args); out: mutex_unlock(&root->fs_info->volume_mutex); + atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0); return ret; } -static long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg) +static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg) { + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; struct btrfs_ioctl_vol_args *vol_args; int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (root->fs_info->sb->s_flags & MS_RDONLY) - return -EROFS; + ret = mnt_want_write_file(file); + if (ret) + return ret; - mutex_lock(&root->fs_info->volume_mutex); - if (root->fs_info->balance_ctl) { - printk(KERN_INFO "btrfs: balance in progress\n"); - ret = -EINVAL; - goto out; + if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running, + 1)) { + pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n"); + mnt_drop_write_file(file); + return -EINVAL; } + mutex_lock(&root->fs_info->volume_mutex); vol_args = memdup_user(arg, sizeof(*vol_args)); if (IS_ERR(vol_args)) { ret = PTR_ERR(vol_args); @@ -2273,6 +2320,8 @@ static long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg) kfree(vol_args); out: mutex_unlock(&root->fs_info->volume_mutex); + atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0); + mnt_drop_write_file(file); return ret; } @@ -2328,7 +2377,7 @@ static long btrfs_ioctl_dev_info(struct btrfs_root *root, void __user *arg) s_uuid = di_args->uuid; mutex_lock(&fs_devices->device_list_mutex); - dev = btrfs_find_device(root, di_args->devid, s_uuid, NULL); + dev = btrfs_find_device(root->fs_info, di_args->devid, s_uuid, NULL); mutex_unlock(&fs_devices->device_list_mutex); if (!dev) { @@ -2821,12 +2870,19 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) struct btrfs_disk_key disk_key; u64 objectid = 0; u64 dir_id; + int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (copy_from_user(&objectid, argp, sizeof(objectid))) - return -EFAULT; + ret = mnt_want_write_file(file); + if (ret) + return ret; + + if (copy_from_user(&objectid, argp, sizeof(objectid))) { + ret = -EFAULT; + goto out; + } if (!objectid) objectid = root->root_key.objectid; @@ -2836,21 +2892,28 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) location.offset = (u64)-1; new_root = btrfs_read_fs_root_no_name(root->fs_info, &location); - if (IS_ERR(new_root)) - return PTR_ERR(new_root); + if (IS_ERR(new_root)) { + ret = PTR_ERR(new_root); + goto out; + } - if (btrfs_root_refs(&new_root->root_item) == 0) - return -ENOENT; + if (btrfs_root_refs(&new_root->root_item) == 0) { + ret = -ENOENT; + goto out; + } path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; + if (!path) { + ret = -ENOMEM; + goto out; + } path->leave_spinning = 1; trans = btrfs_start_transaction(root, 1); if (IS_ERR(trans)) { btrfs_free_path(path); - return PTR_ERR(trans); + ret = PTR_ERR(trans); + goto out; } dir_id = btrfs_super_root_dir(root->fs_info->super_copy); @@ -2861,7 +2924,8 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) btrfs_end_transaction(trans, root); printk(KERN_ERR "Umm, you don't have the default dir item, " "this isn't going to work\n"); - return -ENOENT; + ret = -ENOENT; + goto out; } btrfs_cpu_key_to_disk(&disk_key, &new_root->root_key); @@ -2871,8 +2935,9 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) btrfs_set_fs_incompat(root->fs_info, DEFAULT_SUBVOL); btrfs_end_transaction(trans, root); - - return 0; +out: + mnt_drop_write_file(file); + return ret; } void btrfs_get_block_group_info(struct list_head *groups_list, @@ -3036,32 +3101,38 @@ long btrfs_ioctl_trans_end(struct file *file) return 0; } -static noinline long btrfs_ioctl_start_sync(struct file *file, void __user *argp) +static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root, + void __user *argp) { - struct btrfs_root *root = BTRFS_I(file->f_dentry->d_inode)->root; struct btrfs_trans_handle *trans; u64 transid; int ret; - trans = btrfs_start_transaction(root, 0); - if (IS_ERR(trans)) - return PTR_ERR(trans); + trans = btrfs_attach_transaction(root); + if (IS_ERR(trans)) { + if (PTR_ERR(trans) != -ENOENT) + return PTR_ERR(trans); + + /* No running transaction, don't bother */ + transid = root->fs_info->last_trans_committed; + goto out; + } transid = trans->transid; ret = btrfs_commit_transaction_async(trans, root, 0); if (ret) { btrfs_end_transaction(trans, root); return ret; } - +out: if (argp) if (copy_to_user(argp, &transid, sizeof(transid))) return -EFAULT; return 0; } -static noinline long btrfs_ioctl_wait_sync(struct file *file, void __user *argp) +static noinline long btrfs_ioctl_wait_sync(struct btrfs_root *root, + void __user *argp) { - struct btrfs_root *root = BTRFS_I(file->f_dentry->d_inode)->root; u64 transid; if (argp) { @@ -3073,10 +3144,11 @@ static noinline long btrfs_ioctl_wait_sync(struct file *file, void __user *argp) return btrfs_wait_for_commit(root, transid); } -static long btrfs_ioctl_scrub(struct btrfs_root *root, void __user *arg) +static long btrfs_ioctl_scrub(struct file *file, void __user *arg) { - int ret; + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; struct btrfs_ioctl_scrub_args *sa; + int ret; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -3085,12 +3157,22 @@ static long btrfs_ioctl_scrub(struct btrfs_root *root, void __user *arg) if (IS_ERR(sa)) return PTR_ERR(sa); - ret = btrfs_scrub_dev(root, sa->devid, sa->start, sa->end, - &sa->progress, sa->flags & BTRFS_SCRUB_READONLY); + if (!(sa->flags & BTRFS_SCRUB_READONLY)) { + ret = mnt_want_write_file(file); + if (ret) + goto out; + } + + ret = btrfs_scrub_dev(root->fs_info, sa->devid, sa->start, sa->end, + &sa->progress, sa->flags & BTRFS_SCRUB_READONLY, + 0); if (copy_to_user(arg, sa, sizeof(*sa))) ret = -EFAULT; + if (!(sa->flags & BTRFS_SCRUB_READONLY)) + mnt_drop_write_file(file); +out: kfree(sa); return ret; } @@ -3100,7 +3182,7 @@ static long btrfs_ioctl_scrub_cancel(struct btrfs_root *root, void __user *arg) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - return btrfs_scrub_cancel(root); + return btrfs_scrub_cancel(root->fs_info); } static long btrfs_ioctl_scrub_progress(struct btrfs_root *root, @@ -3149,6 +3231,51 @@ static long btrfs_ioctl_get_dev_stats(struct btrfs_root *root, return ret; } +static long btrfs_ioctl_dev_replace(struct btrfs_root *root, void __user *arg) +{ + struct btrfs_ioctl_dev_replace_args *p; + int ret; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + p = memdup_user(arg, sizeof(*p)); + if (IS_ERR(p)) + return PTR_ERR(p); + + switch (p->cmd) { + case BTRFS_IOCTL_DEV_REPLACE_CMD_START: + if (atomic_xchg( + &root->fs_info->mutually_exclusive_operation_running, + 1)) { + pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n"); + ret = -EINPROGRESS; + } else { + ret = btrfs_dev_replace_start(root, p); + atomic_set( + &root->fs_info->mutually_exclusive_operation_running, + 0); + } + break; + case BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS: + btrfs_dev_replace_status(root->fs_info, p); + ret = 0; + break; + case BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL: + ret = btrfs_dev_replace_cancel(root->fs_info, p); + break; + default: + ret = -EINVAL; + break; + } + + if (copy_to_user(arg, p, sizeof(*p))) + ret = -EFAULT; + + kfree(p); + return ret; +} + static long btrfs_ioctl_ino_to_path(struct btrfs_root *root, void __user *arg) { int ret = 0; @@ -3314,6 +3441,7 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg) struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_ioctl_balance_args *bargs; struct btrfs_balance_control *bctl; + bool need_unlock; /* for mut. excl. ops lock */ int ret; if (!capable(CAP_SYS_ADMIN)) @@ -3323,14 +3451,61 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg) if (ret) return ret; - mutex_lock(&fs_info->volume_mutex); +again: + if (!atomic_xchg(&fs_info->mutually_exclusive_operation_running, 1)) { + mutex_lock(&fs_info->volume_mutex); + mutex_lock(&fs_info->balance_mutex); + need_unlock = true; + goto locked; + } + + /* + * mut. excl. ops lock is locked. Three possibilites: + * (1) some other op is running + * (2) balance is running + * (3) balance is paused -- special case (think resume) + */ mutex_lock(&fs_info->balance_mutex); + if (fs_info->balance_ctl) { + /* this is either (2) or (3) */ + if (!atomic_read(&fs_info->balance_running)) { + mutex_unlock(&fs_info->balance_mutex); + if (!mutex_trylock(&fs_info->volume_mutex)) + goto again; + mutex_lock(&fs_info->balance_mutex); + + if (fs_info->balance_ctl && + !atomic_read(&fs_info->balance_running)) { + /* this is (3) */ + need_unlock = false; + goto locked; + } + + mutex_unlock(&fs_info->balance_mutex); + mutex_unlock(&fs_info->volume_mutex); + goto again; + } else { + /* this is (2) */ + mutex_unlock(&fs_info->balance_mutex); + ret = -EINPROGRESS; + goto out; + } + } else { + /* this is (1) */ + mutex_unlock(&fs_info->balance_mutex); + pr_info("btrfs: dev add/delete/balance/replace/resize operation in progress\n"); + ret = -EINVAL; + goto out; + } + +locked: + BUG_ON(!atomic_read(&fs_info->mutually_exclusive_operation_running)); if (arg) { bargs = memdup_user(arg, sizeof(*bargs)); if (IS_ERR(bargs)) { ret = PTR_ERR(bargs); - goto out; + goto out_unlock; } if (bargs->flags & BTRFS_BALANCE_RESUME) { @@ -3374,11 +3549,17 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg) } do_balance: - ret = btrfs_balance(bctl, bargs); /* - * bctl is freed in __cancel_balance or in free_fs_info if - * restriper was paused all the way until unmount + * Ownership of bctl and mutually_exclusive_operation_running + * goes to to btrfs_balance. bctl is freed in __cancel_balance, + * or, if restriper was paused all the way until unmount, in + * free_fs_info. mutually_exclusive_operation_running is + * cleared in __cancel_balance. */ + need_unlock = false; + + ret = btrfs_balance(bctl, bargs); + if (arg) { if (copy_to_user(arg, bargs, sizeof(*bargs))) ret = -EFAULT; @@ -3386,9 +3567,12 @@ do_balance: out_bargs: kfree(bargs); -out: +out_unlock: mutex_unlock(&fs_info->balance_mutex); mutex_unlock(&fs_info->volume_mutex); + if (need_unlock) + atomic_set(&fs_info->mutually_exclusive_operation_running, 0); +out: mnt_drop_write_file(file); return ret; } @@ -3441,8 +3625,9 @@ out: return ret; } -static long btrfs_ioctl_quota_ctl(struct btrfs_root *root, void __user *arg) +static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg) { + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; struct btrfs_ioctl_quota_ctl_args *sa; struct btrfs_trans_handle *trans = NULL; int ret; @@ -3451,12 +3636,15 @@ static long btrfs_ioctl_quota_ctl(struct btrfs_root *root, void __user *arg) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (root->fs_info->sb->s_flags & MS_RDONLY) - return -EROFS; + ret = mnt_want_write_file(file); + if (ret) + return ret; sa = memdup_user(arg, sizeof(*sa)); - if (IS_ERR(sa)) - return PTR_ERR(sa); + if (IS_ERR(sa)) { + ret = PTR_ERR(sa); + goto drop_write; + } if (sa->cmd != BTRFS_QUOTA_CTL_RESCAN) { trans = btrfs_start_transaction(root, 2); @@ -3489,14 +3677,16 @@ static long btrfs_ioctl_quota_ctl(struct btrfs_root *root, void __user *arg) if (err && !ret) ret = err; } - out: kfree(sa); +drop_write: + mnt_drop_write_file(file); return ret; } -static long btrfs_ioctl_qgroup_assign(struct btrfs_root *root, void __user *arg) +static long btrfs_ioctl_qgroup_assign(struct file *file, void __user *arg) { + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; struct btrfs_ioctl_qgroup_assign_args *sa; struct btrfs_trans_handle *trans; int ret; @@ -3505,12 +3695,15 @@ static long btrfs_ioctl_qgroup_assign(struct btrfs_root *root, void __user *arg) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (root->fs_info->sb->s_flags & MS_RDONLY) - return -EROFS; + ret = mnt_want_write_file(file); + if (ret) + return ret; sa = memdup_user(arg, sizeof(*sa)); - if (IS_ERR(sa)) - return PTR_ERR(sa); + if (IS_ERR(sa)) { + ret = PTR_ERR(sa); + goto drop_write; + } trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { @@ -3533,11 +3726,14 @@ static long btrfs_ioctl_qgroup_assign(struct btrfs_root *root, void __user *arg) out: kfree(sa); +drop_write: + mnt_drop_write_file(file); return ret; } -static long btrfs_ioctl_qgroup_create(struct btrfs_root *root, void __user *arg) +static long btrfs_ioctl_qgroup_create(struct file *file, void __user *arg) { + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; struct btrfs_ioctl_qgroup_create_args *sa; struct btrfs_trans_handle *trans; int ret; @@ -3546,12 +3742,20 @@ static long btrfs_ioctl_qgroup_create(struct btrfs_root *root, void __user *arg) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (root->fs_info->sb->s_flags & MS_RDONLY) - return -EROFS; + ret = mnt_want_write_file(file); + if (ret) + return ret; sa = memdup_user(arg, sizeof(*sa)); - if (IS_ERR(sa)) - return PTR_ERR(sa); + if (IS_ERR(sa)) { + ret = PTR_ERR(sa); + goto drop_write; + } + + if (!sa->qgroupid) { + ret = -EINVAL; + goto out; + } trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { @@ -3573,11 +3777,14 @@ static long btrfs_ioctl_qgroup_create(struct btrfs_root *root, void __user *arg) out: kfree(sa); +drop_write: + mnt_drop_write_file(file); return ret; } -static long btrfs_ioctl_qgroup_limit(struct btrfs_root *root, void __user *arg) +static long btrfs_ioctl_qgroup_limit(struct file *file, void __user *arg) { + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; struct btrfs_ioctl_qgroup_limit_args *sa; struct btrfs_trans_handle *trans; int ret; @@ -3587,12 +3794,15 @@ static long btrfs_ioctl_qgroup_limit(struct btrfs_root *root, void __user *arg) if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (root->fs_info->sb->s_flags & MS_RDONLY) - return -EROFS; + ret = mnt_want_write_file(file); + if (ret) + return ret; sa = memdup_user(arg, sizeof(*sa)); - if (IS_ERR(sa)) - return PTR_ERR(sa); + if (IS_ERR(sa)) { + ret = PTR_ERR(sa); + goto drop_write; + } trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { @@ -3615,6 +3825,8 @@ static long btrfs_ioctl_qgroup_limit(struct btrfs_root *root, void __user *arg) out: kfree(sa); +drop_write: + mnt_drop_write_file(file); return ret; } @@ -3735,11 +3947,11 @@ long btrfs_ioctl(struct file *file, unsigned int case BTRFS_IOC_DEFRAG_RANGE: return btrfs_ioctl_defrag(file, argp); case BTRFS_IOC_RESIZE: - return btrfs_ioctl_resize(root, argp); + return btrfs_ioctl_resize(file, argp); case BTRFS_IOC_ADD_DEV: return btrfs_ioctl_add_dev(root, argp); case BTRFS_IOC_RM_DEV: - return btrfs_ioctl_rm_dev(root, argp); + return btrfs_ioctl_rm_dev(file, argp); case BTRFS_IOC_FS_INFO: return btrfs_ioctl_fs_info(root, argp); case BTRFS_IOC_DEV_INFO: @@ -3768,11 +3980,11 @@ long btrfs_ioctl(struct file *file, unsigned int btrfs_sync_fs(file->f_dentry->d_sb, 1); return 0; case BTRFS_IOC_START_SYNC: - return btrfs_ioctl_start_sync(file, argp); + return btrfs_ioctl_start_sync(root, argp); case BTRFS_IOC_WAIT_SYNC: - return btrfs_ioctl_wait_sync(file, argp); + return btrfs_ioctl_wait_sync(root, argp); case BTRFS_IOC_SCRUB: - return btrfs_ioctl_scrub(root, argp); + return btrfs_ioctl_scrub(file, argp); case BTRFS_IOC_SCRUB_CANCEL: return btrfs_ioctl_scrub_cancel(root, argp); case BTRFS_IOC_SCRUB_PROGRESS: @@ -3790,13 +4002,15 @@ long btrfs_ioctl(struct file *file, unsigned int case BTRFS_IOC_GET_DEV_STATS: return btrfs_ioctl_get_dev_stats(root, argp); case BTRFS_IOC_QUOTA_CTL: - return btrfs_ioctl_quota_ctl(root, argp); + return btrfs_ioctl_quota_ctl(file, argp); case BTRFS_IOC_QGROUP_ASSIGN: - return btrfs_ioctl_qgroup_assign(root, argp); + return btrfs_ioctl_qgroup_assign(file, argp); case BTRFS_IOC_QGROUP_CREATE: - return btrfs_ioctl_qgroup_create(root, argp); + return btrfs_ioctl_qgroup_create(file, argp); case BTRFS_IOC_QGROUP_LIMIT: - return btrfs_ioctl_qgroup_limit(root, argp); + return btrfs_ioctl_qgroup_limit(file, argp); + case BTRFS_IOC_DEV_REPLACE: + return btrfs_ioctl_dev_replace(root, argp); } return -ENOTTY; diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index 731e2875ab9..dabca9cc8c2 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -30,6 +30,8 @@ struct btrfs_ioctl_vol_args { char name[BTRFS_PATH_NAME_MAX + 1]; }; +#define BTRFS_DEVICE_PATH_NAME_MAX 1024 + #define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0) #define BTRFS_SUBVOL_RDONLY (1ULL << 1) #define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2) @@ -123,7 +125,48 @@ struct btrfs_ioctl_scrub_args { __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8]; }; -#define BTRFS_DEVICE_PATH_NAME_MAX 1024 +#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0 +#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1 +struct btrfs_ioctl_dev_replace_start_params { + __u64 srcdevid; /* in, if 0, use srcdev_name instead */ + __u64 cont_reading_from_srcdev_mode; /* in, see #define + * above */ + __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */ + __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */ +}; + +#define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0 +#define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1 +#define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2 +#define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3 +#define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4 +struct btrfs_ioctl_dev_replace_status_params { + __u64 replace_state; /* out, see #define above */ + __u64 progress_1000; /* out, 0 <= x <= 1000 */ + __u64 time_started; /* out, seconds since 1-Jan-1970 */ + __u64 time_stopped; /* out, seconds since 1-Jan-1970 */ + __u64 num_write_errors; /* out */ + __u64 num_uncorrectable_read_errors; /* out */ +}; + +#define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0 +#define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1 +#define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2 +#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0 +#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1 +#define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2 +struct btrfs_ioctl_dev_replace_args { + __u64 cmd; /* in */ + __u64 result; /* out */ + + union { + struct btrfs_ioctl_dev_replace_start_params start; + struct btrfs_ioctl_dev_replace_status_params status; + }; /* in/out */ + + __u64 spare[64]; +}; + struct btrfs_ioctl_dev_info_args { __u64 devid; /* in/out */ __u8 uuid[BTRFS_UUID_SIZE]; /* in/out */ @@ -453,4 +496,7 @@ struct btrfs_ioctl_send_args { struct btrfs_ioctl_qgroup_limit_args) #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \ struct btrfs_ioctl_get_dev_stats) +#define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \ + struct btrfs_ioctl_dev_replace_args) + #endif diff --git a/fs/btrfs/math.h b/fs/btrfs/math.h new file mode 100644 index 00000000000..b7816cefbd1 --- /dev/null +++ b/fs/btrfs/math.h @@ -0,0 +1,44 @@ + +/* + * Copyright (C) 2012 Fujitsu. All rights reserved. + * Written by Miao Xie <miaox@cn.fujitsu.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#ifndef __BTRFS_MATH_H +#define __BTRFS_MATH_H + +#include <asm/div64.h> + +static inline u64 div_factor(u64 num, int factor) +{ + if (factor == 10) + return num; + num *= factor; + do_div(num, 10); + return num; +} + +static inline u64 div_factor_fine(u64 num, int factor) +{ + if (factor == 100) + return num; + num *= factor; + do_div(num, 100); + return num; +} + +#endif diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 7772f02ba28..f1073129704 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -211,6 +211,8 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, init_waitqueue_head(&entry->wait); INIT_LIST_HEAD(&entry->list); INIT_LIST_HEAD(&entry->root_extent_list); + INIT_LIST_HEAD(&entry->work_list); + init_completion(&entry->completion); trace_btrfs_ordered_extent_add(inode, entry); @@ -464,18 +466,28 @@ void btrfs_remove_ordered_extent(struct inode *inode, wake_up(&entry->wait); } +static void btrfs_run_ordered_extent_work(struct btrfs_work *work) +{ + struct btrfs_ordered_extent *ordered; + + ordered = container_of(work, struct btrfs_ordered_extent, flush_work); + btrfs_start_ordered_extent(ordered->inode, ordered, 1); + complete(&ordered->completion); +} + /* * wait for all the ordered extents in a root. This is done when balancing * space between drives. */ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput) { - struct list_head splice; + struct list_head splice, works; struct list_head *cur; - struct btrfs_ordered_extent *ordered; + struct btrfs_ordered_extent *ordered, *next; struct inode *inode; INIT_LIST_HEAD(&splice); + INIT_LIST_HEAD(&works); spin_lock(&root->fs_info->ordered_extent_lock); list_splice_init(&root->fs_info->ordered_extents, &splice); @@ -494,19 +506,32 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput) spin_unlock(&root->fs_info->ordered_extent_lock); if (inode) { - btrfs_start_ordered_extent(inode, ordered, 1); - btrfs_put_ordered_extent(ordered); - if (delay_iput) - btrfs_add_delayed_iput(inode); - else - iput(inode); + ordered->flush_work.func = btrfs_run_ordered_extent_work; + list_add_tail(&ordered->work_list, &works); + btrfs_queue_worker(&root->fs_info->flush_workers, + &ordered->flush_work); } else { btrfs_put_ordered_extent(ordered); } + cond_resched(); spin_lock(&root->fs_info->ordered_extent_lock); } spin_unlock(&root->fs_info->ordered_extent_lock); + + list_for_each_entry_safe(ordered, next, &works, work_list) { + list_del_init(&ordered->work_list); + wait_for_completion(&ordered->completion); + + inode = ordered->inode; + btrfs_put_ordered_extent(ordered); + if (delay_iput) + btrfs_add_delayed_iput(inode); + else + iput(inode); + + cond_resched(); + } } /* @@ -519,13 +544,17 @@ void btrfs_wait_ordered_extents(struct btrfs_root *root, int delay_iput) * extra check to make sure the ordered operation list really is empty * before we return */ -void btrfs_run_ordered_operations(struct btrfs_root *root, int wait) +int btrfs_run_ordered_operations(struct btrfs_root *root, int wait) { struct btrfs_inode *btrfs_inode; struct inode *inode; struct list_head splice; + struct list_head works; + struct btrfs_delalloc_work *work, *next; + int ret = 0; INIT_LIST_HEAD(&splice); + INIT_LIST_HEAD(&works); mutex_lock(&root->fs_info->ordered_operations_mutex); spin_lock(&root->fs_info->ordered_extent_lock); @@ -533,6 +562,7 @@ again: list_splice_init(&root->fs_info->ordered_operations, &splice); while (!list_empty(&splice)) { + btrfs_inode = list_entry(splice.next, struct btrfs_inode, ordered_operations); @@ -549,15 +579,26 @@ again: list_add_tail(&BTRFS_I(inode)->ordered_operations, &root->fs_info->ordered_operations); } + + if (!inode) + continue; spin_unlock(&root->fs_info->ordered_extent_lock); - if (inode) { - if (wait) - btrfs_wait_ordered_range(inode, 0, (u64)-1); - else - filemap_flush(inode->i_mapping); - btrfs_add_delayed_iput(inode); + work = btrfs_alloc_delalloc_work(inode, wait, 1); + if (!work) { + if (list_empty(&BTRFS_I(inode)->ordered_operations)) + list_add_tail(&btrfs_inode->ordered_operations, + &splice); + spin_lock(&root->fs_info->ordered_extent_lock); + list_splice_tail(&splice, + &root->fs_info->ordered_operations); + spin_unlock(&root->fs_info->ordered_extent_lock); + ret = -ENOMEM; + goto out; } + list_add_tail(&work->list, &works); + btrfs_queue_worker(&root->fs_info->flush_workers, + &work->work); cond_resched(); spin_lock(&root->fs_info->ordered_extent_lock); @@ -566,7 +607,13 @@ again: goto again; spin_unlock(&root->fs_info->ordered_extent_lock); +out: + list_for_each_entry_safe(work, next, &works, list) { + list_del_init(&work->list); + btrfs_wait_and_free_delalloc_work(work); + } mutex_unlock(&root->fs_info->ordered_operations_mutex); + return ret; } /* @@ -606,7 +653,6 @@ void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len) u64 end; u64 orig_end; struct btrfs_ordered_extent *ordered; - int found; if (start + len < start) { orig_end = INT_LIMIT(loff_t); @@ -642,7 +688,6 @@ void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len) filemap_fdatawait_range(inode->i_mapping, start, orig_end); end = orig_end; - found = 0; while (1) { ordered = btrfs_lookup_first_ordered_extent(inode, end); if (!ordered) @@ -655,7 +700,6 @@ void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len) btrfs_put_ordered_extent(ordered); break; } - found++; btrfs_start_ordered_extent(inode, ordered, 1); end = ordered->file_offset; btrfs_put_ordered_extent(ordered); @@ -934,15 +978,6 @@ void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, if (last_mod < root->fs_info->last_trans_committed) return; - /* - * the transaction is already committing. Just start the IO and - * don't bother with all of this list nonsense - */ - if (trans && root->fs_info->running_transaction->blocked) { - btrfs_wait_ordered_range(inode, 0, (u64)-1); - return; - } - spin_lock(&root->fs_info->ordered_extent_lock); if (list_empty(&BTRFS_I(inode)->ordered_operations)) { list_add_tail(&BTRFS_I(inode)->ordered_operations, @@ -959,6 +994,7 @@ int __init ordered_data_init(void) NULL); if (!btrfs_ordered_extent_cache) return -ENOMEM; + return 0; } diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index 853fc7beedf..f29d4bf5fbe 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -128,8 +128,11 @@ struct btrfs_ordered_extent { struct list_head root_extent_list; struct btrfs_work work; -}; + struct completion completion; + struct btrfs_work flush_work; + struct list_head work_list; +}; /* * calculates the total size you need to allocate for an ordered sum @@ -186,7 +189,7 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode, int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, struct btrfs_ordered_extent *ordered); int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, u32 *sum); -void btrfs_run_ordered_operations(struct btrfs_root *root, int wait); +int btrfs_run_ordered_operations(struct btrfs_root *root, int wait); void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode); diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c index 5e23684887e..50d95fd190a 100644 --- a/fs/btrfs/print-tree.c +++ b/fs/btrfs/print-tree.c @@ -297,6 +297,9 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) case BTRFS_DEV_STATS_KEY: printk(KERN_INFO "\t\tdevice stats\n"); break; + case BTRFS_DEV_REPLACE_KEY: + printk(KERN_INFO "\t\tdev replace\n"); + break; }; } } diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index fe9d02c45f8..a5c85623432 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -379,6 +379,13 @@ next1: ret = add_relation_rb(fs_info, found_key.objectid, found_key.offset); + if (ret == -ENOENT) { + printk(KERN_WARNING + "btrfs: orphan qgroup relation 0x%llx->0x%llx\n", + (unsigned long long)found_key.objectid, + (unsigned long long)found_key.offset); + ret = 0; /* ignore the error */ + } if (ret) goto out; next2: @@ -956,17 +963,28 @@ int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 qgroupid) { struct btrfs_root *quota_root; + struct btrfs_qgroup *qgroup; int ret = 0; quota_root = fs_info->quota_root; if (!quota_root) return -EINVAL; + /* check if there are no relations to this qgroup */ + spin_lock(&fs_info->qgroup_lock); + qgroup = find_qgroup_rb(fs_info, qgroupid); + if (qgroup) { + if (!list_empty(&qgroup->groups) || !list_empty(&qgroup->members)) { + spin_unlock(&fs_info->qgroup_lock); + return -EBUSY; + } + } + spin_unlock(&fs_info->qgroup_lock); + ret = del_qgroup_item(trans, quota_root, qgroupid); spin_lock(&fs_info->qgroup_lock); del_qgroup_rb(quota_root->fs_info, qgroupid); - spin_unlock(&fs_info->qgroup_lock); return ret; diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c index a955669519a..96b93daa0bb 100644 --- a/fs/btrfs/reada.c +++ b/fs/btrfs/reada.c @@ -27,6 +27,7 @@ #include "volumes.h" #include "disk-io.h" #include "transaction.h" +#include "dev-replace.h" #undef DEBUG @@ -323,7 +324,6 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, struct reada_extent *re = NULL; struct reada_extent *re_exist = NULL; struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree; struct btrfs_bio *bbio = NULL; struct btrfs_device *dev; struct btrfs_device *prev_dev; @@ -332,6 +332,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, int nzones = 0; int i; unsigned long index = logical >> PAGE_CACHE_SHIFT; + int dev_replace_is_ongoing; spin_lock(&fs_info->reada_lock); re = radix_tree_lookup(&fs_info->reada_tree, index); @@ -358,7 +359,8 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, * map block */ length = blocksize; - ret = btrfs_map_block(map_tree, REQ_WRITE, logical, &length, &bbio, 0); + ret = btrfs_map_block(fs_info, REQ_GET_READ_MIRRORS, logical, &length, + &bbio, 0); if (ret || !bbio || length < blocksize) goto error; @@ -393,6 +395,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, } /* insert extent in reada_tree + all per-device trees, all or nothing */ + btrfs_dev_replace_lock(&fs_info->dev_replace); spin_lock(&fs_info->reada_lock); ret = radix_tree_insert(&fs_info->reada_tree, index, re); if (ret == -EEXIST) { @@ -400,13 +403,17 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, BUG_ON(!re_exist); re_exist->refcnt++; spin_unlock(&fs_info->reada_lock); + btrfs_dev_replace_unlock(&fs_info->dev_replace); goto error; } if (ret) { spin_unlock(&fs_info->reada_lock); + btrfs_dev_replace_unlock(&fs_info->dev_replace); goto error; } prev_dev = NULL; + dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing( + &fs_info->dev_replace); for (i = 0; i < nzones; ++i) { dev = bbio->stripes[i].dev; if (dev == prev_dev) { @@ -419,21 +426,36 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, */ continue; } + if (!dev->bdev) { + /* cannot read ahead on missing device */ + continue; + } + if (dev_replace_is_ongoing && + dev == fs_info->dev_replace.tgtdev) { + /* + * as this device is selected for reading only as + * a last resort, skip it for read ahead. + */ + continue; + } prev_dev = dev; ret = radix_tree_insert(&dev->reada_extents, index, re); if (ret) { while (--i >= 0) { dev = bbio->stripes[i].dev; BUG_ON(dev == NULL); + /* ignore whether the entry was inserted */ radix_tree_delete(&dev->reada_extents, index); } BUG_ON(fs_info == NULL); radix_tree_delete(&fs_info->reada_tree, index); spin_unlock(&fs_info->reada_lock); + btrfs_dev_replace_unlock(&fs_info->dev_replace); goto error; } } spin_unlock(&fs_info->reada_lock); + btrfs_dev_replace_unlock(&fs_info->dev_replace); kfree(bbio); return re; @@ -915,7 +937,10 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root, generation = btrfs_header_generation(node); free_extent_buffer(node); - reada_add_block(rc, start, &max_key, level, generation); + if (reada_add_block(rc, start, &max_key, level, generation)) { + kfree(rc); + return ERR_PTR(-ENOMEM); + } reada_start_machine(root->fs_info); diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index c188e815a73..17c306bf177 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -2025,7 +2025,6 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc, struct btrfs_root_item *root_item; struct btrfs_path *path; struct extent_buffer *leaf; - unsigned long nr; int level; int max_level; int replaced = 0; @@ -2074,7 +2073,8 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc, BUG_ON(IS_ERR(trans)); trans->block_rsv = rc->block_rsv; - ret = btrfs_block_rsv_refill(root, rc->block_rsv, min_reserved); + ret = btrfs_block_rsv_refill(root, rc->block_rsv, min_reserved, + BTRFS_RESERVE_FLUSH_ALL); if (ret) { BUG_ON(ret != -EAGAIN); ret = btrfs_commit_transaction(trans, root); @@ -2125,10 +2125,9 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc, path->slots[level]); root_item->drop_level = level; - nr = trans->blocks_used; btrfs_end_transaction_throttle(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); if (replaced && rc->stage == UPDATE_DATA_PTRS) invalidate_extent_cache(root, &key, &next_key); @@ -2155,10 +2154,9 @@ out: btrfs_update_reloc_root(trans, root); } - nr = trans->blocks_used; btrfs_end_transaction_throttle(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); if (replaced && rc->stage == UPDATE_DATA_PTRS) invalidate_extent_cache(root, &key, &next_key); @@ -2184,7 +2182,8 @@ int prepare_to_merge(struct reloc_control *rc, int err) again: if (!err) { num_bytes = rc->merging_rsv_size; - ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes); + ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes, + BTRFS_RESERVE_FLUSH_ALL); if (ret) err = ret; } @@ -2459,7 +2458,8 @@ static int reserve_metadata_space(struct btrfs_trans_handle *trans, num_bytes = calcu_metadata_size(rc, node, 1) * 2; trans->block_rsv = rc->block_rsv; - ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes); + ret = btrfs_block_rsv_add(root, rc->block_rsv, num_bytes, + BTRFS_RESERVE_FLUSH_ALL); if (ret) { if (ret == -EAGAIN) rc->commit_transaction = 1; @@ -3259,7 +3259,6 @@ static int delete_block_group_cache(struct btrfs_fs_info *fs_info, struct btrfs_path *path; struct btrfs_root *root = fs_info->tree_root; struct btrfs_trans_handle *trans; - unsigned long nr; int ret = 0; if (inode) @@ -3293,9 +3292,8 @@ truncate: ret = btrfs_truncate_free_space_cache(root, trans, path, inode); btrfs_free_path(path); - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); out: iput(inode); return ret; @@ -3685,7 +3683,8 @@ int prepare_to_relocate(struct reloc_control *rc) * is no reservation in transaction handle. */ ret = btrfs_block_rsv_add(rc->extent_root, rc->block_rsv, - rc->extent_root->nodesize * 256); + rc->extent_root->nodesize * 256, + BTRFS_RESERVE_FLUSH_ALL); if (ret) return ret; @@ -3711,7 +3710,6 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc) struct btrfs_trans_handle *trans = NULL; struct btrfs_path *path; struct btrfs_extent_item *ei; - unsigned long nr; u64 flags; u32 item_size; int ret; @@ -3828,9 +3826,8 @@ restart: ret = btrfs_commit_transaction(trans, rc->extent_root); BUG_ON(ret); } else { - nr = trans->blocks_used; btrfs_end_transaction_throttle(trans, rc->extent_root); - btrfs_btree_balance_dirty(rc->extent_root, nr); + btrfs_btree_balance_dirty(rc->extent_root); } trans = NULL; @@ -3860,9 +3857,8 @@ restart: GFP_NOFS); if (trans) { - nr = trans->blocks_used; btrfs_end_transaction_throttle(trans, rc->extent_root); - btrfs_btree_balance_dirty(rc->extent_root, nr); + btrfs_btree_balance_dirty(rc->extent_root); } if (!err) { @@ -3941,7 +3937,6 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info, struct btrfs_trans_handle *trans; struct btrfs_root *root; struct btrfs_key key; - unsigned long nr; u64 objectid = BTRFS_FIRST_FREE_OBJECTID; int err = 0; @@ -3969,9 +3964,8 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info, err = btrfs_orphan_add(trans, inode); out: - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(root, nr); + btrfs_btree_balance_dirty(root); if (err) { if (inode) iput(inode); @@ -4057,7 +4051,11 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start) (unsigned long long)rc->block_group->key.objectid, (unsigned long long)rc->block_group->flags); - btrfs_start_delalloc_inodes(fs_info->tree_root, 0); + ret = btrfs_start_delalloc_inodes(fs_info->tree_root, 0); + if (ret < 0) { + err = ret; + goto out; + } btrfs_wait_ordered_extents(fs_info->tree_root, 0); while (1) { diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index eb923d087da..668af537a3e 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -548,9 +548,9 @@ void btrfs_update_root_times(struct btrfs_trans_handle *trans, struct btrfs_root_item *item = &root->root_item; struct timespec ct = CURRENT_TIME; - spin_lock(&root->root_times_lock); + spin_lock(&root->root_item_lock); item->ctransid = cpu_to_le64(trans->transid); item->ctime.sec = cpu_to_le64(ct.tv_sec); item->ctime.nsec = cpu_to_le32(ct.tv_nsec); - spin_unlock(&root->root_times_lock); + spin_unlock(&root->root_item_lock); } diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 27892f67e69..bdbb94f245c 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2011 STRATO. All rights reserved. + * Copyright (C) 2011, 2012 STRATO. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public @@ -25,6 +25,7 @@ #include "transaction.h" #include "backref.h" #include "extent_io.h" +#include "dev-replace.h" #include "check-integrity.h" #include "rcu-string.h" @@ -42,10 +43,23 @@ */ struct scrub_block; -struct scrub_dev; +struct scrub_ctx; -#define SCRUB_PAGES_PER_BIO 16 /* 64k per bio */ -#define SCRUB_BIOS_PER_DEV 16 /* 1 MB per device in flight */ +/* + * the following three values only influence the performance. + * The last one configures the number of parallel and outstanding I/O + * operations. The first two values configure an upper limit for the number + * of (dynamically allocated) pages that are added to a bio. + */ +#define SCRUB_PAGES_PER_RD_BIO 32 /* 128k per bio */ +#define SCRUB_PAGES_PER_WR_BIO 32 /* 128k per bio */ +#define SCRUB_BIOS_PER_SCTX 64 /* 8MB per device in flight */ + +/* + * the following value times PAGE_SIZE needs to be large enough to match the + * largest node/leaf/sector size that shall be supported. + * Values larger than BTRFS_STRIPE_LEN are not supported. + */ #define SCRUB_MAX_PAGES_PER_BLOCK 16 /* 64k per node/leaf/sector */ struct scrub_page { @@ -56,6 +70,8 @@ struct scrub_page { u64 generation; u64 logical; u64 physical; + u64 physical_for_dev_replace; + atomic_t ref_count; struct { unsigned int mirror_num:8; unsigned int have_csum:1; @@ -66,23 +82,28 @@ struct scrub_page { struct scrub_bio { int index; - struct scrub_dev *sdev; + struct scrub_ctx *sctx; + struct btrfs_device *dev; struct bio *bio; int err; u64 logical; u64 physical; - struct scrub_page *pagev[SCRUB_PAGES_PER_BIO]; +#if SCRUB_PAGES_PER_WR_BIO >= SCRUB_PAGES_PER_RD_BIO + struct scrub_page *pagev[SCRUB_PAGES_PER_WR_BIO]; +#else + struct scrub_page *pagev[SCRUB_PAGES_PER_RD_BIO]; +#endif int page_count; int next_free; struct btrfs_work work; }; struct scrub_block { - struct scrub_page pagev[SCRUB_MAX_PAGES_PER_BLOCK]; + struct scrub_page *pagev[SCRUB_MAX_PAGES_PER_BLOCK]; int page_count; atomic_t outstanding_pages; atomic_t ref_count; /* free mem on transition to zero */ - struct scrub_dev *sdev; + struct scrub_ctx *sctx; struct { unsigned int header_error:1; unsigned int checksum_error:1; @@ -91,23 +112,35 @@ struct scrub_block { }; }; -struct scrub_dev { - struct scrub_bio *bios[SCRUB_BIOS_PER_DEV]; - struct btrfs_device *dev; +struct scrub_wr_ctx { + struct scrub_bio *wr_curr_bio; + struct btrfs_device *tgtdev; + int pages_per_wr_bio; /* <= SCRUB_PAGES_PER_WR_BIO */ + atomic_t flush_all_writes; + struct mutex wr_lock; +}; + +struct scrub_ctx { + struct scrub_bio *bios[SCRUB_BIOS_PER_SCTX]; + struct btrfs_root *dev_root; int first_free; int curr; - atomic_t in_flight; - atomic_t fixup_cnt; + atomic_t bios_in_flight; + atomic_t workers_pending; spinlock_t list_lock; wait_queue_head_t list_wait; u16 csum_size; struct list_head csum_list; atomic_t cancel_req; int readonly; - int pages_per_bio; /* <= SCRUB_PAGES_PER_BIO */ + int pages_per_rd_bio; u32 sectorsize; u32 nodesize; u32 leafsize; + + int is_dev_replace; + struct scrub_wr_ctx wr_ctx; + /* * statistics */ @@ -116,13 +149,23 @@ struct scrub_dev { }; struct scrub_fixup_nodatasum { - struct scrub_dev *sdev; + struct scrub_ctx *sctx; + struct btrfs_device *dev; u64 logical; struct btrfs_root *root; struct btrfs_work work; int mirror_num; }; +struct scrub_copy_nocow_ctx { + struct scrub_ctx *sctx; + u64 logical; + u64 len; + int mirror_num; + u64 physical_for_dev_replace; + struct btrfs_work work; +}; + struct scrub_warning { struct btrfs_path *path; u64 extent_item_size; @@ -137,15 +180,20 @@ struct scrub_warning { }; +static void scrub_pending_bio_inc(struct scrub_ctx *sctx); +static void scrub_pending_bio_dec(struct scrub_ctx *sctx); +static void scrub_pending_trans_workers_inc(struct scrub_ctx *sctx); +static void scrub_pending_trans_workers_dec(struct scrub_ctx *sctx); static int scrub_handle_errored_block(struct scrub_block *sblock_to_check); -static int scrub_setup_recheck_block(struct scrub_dev *sdev, - struct btrfs_mapping_tree *map_tree, +static int scrub_setup_recheck_block(struct scrub_ctx *sctx, + struct btrfs_fs_info *fs_info, + struct scrub_block *original_sblock, u64 length, u64 logical, - struct scrub_block *sblock); -static int scrub_recheck_block(struct btrfs_fs_info *fs_info, - struct scrub_block *sblock, int is_metadata, - int have_csum, u8 *csum, u64 generation, - u16 csum_size); + struct scrub_block *sblocks_for_recheck); +static void scrub_recheck_block(struct btrfs_fs_info *fs_info, + struct scrub_block *sblock, int is_metadata, + int have_csum, u8 *csum, u64 generation, + u16 csum_size); static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info, struct scrub_block *sblock, int is_metadata, int have_csum, @@ -158,118 +206,221 @@ static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad, static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad, struct scrub_block *sblock_good, int page_num, int force_write); +static void scrub_write_block_to_dev_replace(struct scrub_block *sblock); +static int scrub_write_page_to_dev_replace(struct scrub_block *sblock, + int page_num); static int scrub_checksum_data(struct scrub_block *sblock); static int scrub_checksum_tree_block(struct scrub_block *sblock); static int scrub_checksum_super(struct scrub_block *sblock); static void scrub_block_get(struct scrub_block *sblock); static void scrub_block_put(struct scrub_block *sblock); -static int scrub_add_page_to_bio(struct scrub_dev *sdev, - struct scrub_page *spage); -static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len, - u64 physical, u64 flags, u64 gen, int mirror_num, - u8 *csum, int force); +static void scrub_page_get(struct scrub_page *spage); +static void scrub_page_put(struct scrub_page *spage); +static int scrub_add_page_to_rd_bio(struct scrub_ctx *sctx, + struct scrub_page *spage); +static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len, + u64 physical, struct btrfs_device *dev, u64 flags, + u64 gen, int mirror_num, u8 *csum, int force, + u64 physical_for_dev_replace); static void scrub_bio_end_io(struct bio *bio, int err); static void scrub_bio_end_io_worker(struct btrfs_work *work); static void scrub_block_complete(struct scrub_block *sblock); +static void scrub_remap_extent(struct btrfs_fs_info *fs_info, + u64 extent_logical, u64 extent_len, + u64 *extent_physical, + struct btrfs_device **extent_dev, + int *extent_mirror_num); +static int scrub_setup_wr_ctx(struct scrub_ctx *sctx, + struct scrub_wr_ctx *wr_ctx, + struct btrfs_fs_info *fs_info, + struct btrfs_device *dev, + int is_dev_replace); +static void scrub_free_wr_ctx(struct scrub_wr_ctx *wr_ctx); +static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx, + struct scrub_page *spage); +static void scrub_wr_submit(struct scrub_ctx *sctx); +static void scrub_wr_bio_end_io(struct bio *bio, int err); +static void scrub_wr_bio_end_io_worker(struct btrfs_work *work); +static int write_page_nocow(struct scrub_ctx *sctx, + u64 physical_for_dev_replace, struct page *page); +static int copy_nocow_pages_for_inode(u64 inum, u64 offset, u64 root, + void *ctx); +static int copy_nocow_pages(struct scrub_ctx *sctx, u64 logical, u64 len, + int mirror_num, u64 physical_for_dev_replace); +static void copy_nocow_pages_worker(struct btrfs_work *work); + + +static void scrub_pending_bio_inc(struct scrub_ctx *sctx) +{ + atomic_inc(&sctx->bios_in_flight); +} + +static void scrub_pending_bio_dec(struct scrub_ctx *sctx) +{ + atomic_dec(&sctx->bios_in_flight); + wake_up(&sctx->list_wait); +} + +/* + * used for workers that require transaction commits (i.e., for the + * NOCOW case) + */ +static void scrub_pending_trans_workers_inc(struct scrub_ctx *sctx) +{ + struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info; + + /* + * increment scrubs_running to prevent cancel requests from + * completing as long as a worker is running. we must also + * increment scrubs_paused to prevent deadlocking on pause + * requests used for transactions commits (as the worker uses a + * transaction context). it is safe to regard the worker + * as paused for all matters practical. effectively, we only + * avoid cancellation requests from completing. + */ + mutex_lock(&fs_info->scrub_lock); + atomic_inc(&fs_info->scrubs_running); + atomic_inc(&fs_info->scrubs_paused); + mutex_unlock(&fs_info->scrub_lock); + atomic_inc(&sctx->workers_pending); +} +/* used for workers that require transaction commits */ +static void scrub_pending_trans_workers_dec(struct scrub_ctx *sctx) +{ + struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info; -static void scrub_free_csums(struct scrub_dev *sdev) + /* + * see scrub_pending_trans_workers_inc() why we're pretending + * to be paused in the scrub counters + */ + mutex_lock(&fs_info->scrub_lock); + atomic_dec(&fs_info->scrubs_running); + atomic_dec(&fs_info->scrubs_paused); + mutex_unlock(&fs_info->scrub_lock); + atomic_dec(&sctx->workers_pending); + wake_up(&fs_info->scrub_pause_wait); + wake_up(&sctx->list_wait); +} + +static void scrub_free_csums(struct scrub_ctx *sctx) { - while (!list_empty(&sdev->csum_list)) { + while (!list_empty(&sctx->csum_list)) { struct btrfs_ordered_sum *sum; - sum = list_first_entry(&sdev->csum_list, + sum = list_first_entry(&sctx->csum_list, struct btrfs_ordered_sum, list); list_del(&sum->list); kfree(sum); } } -static noinline_for_stack void scrub_free_dev(struct scrub_dev *sdev) +static noinline_for_stack void scrub_free_ctx(struct scrub_ctx *sctx) { int i; - if (!sdev) + if (!sctx) return; + scrub_free_wr_ctx(&sctx->wr_ctx); + /* this can happen when scrub is cancelled */ - if (sdev->curr != -1) { - struct scrub_bio *sbio = sdev->bios[sdev->curr]; + if (sctx->curr != -1) { + struct scrub_bio *sbio = sctx->bios[sctx->curr]; for (i = 0; i < sbio->page_count; i++) { - BUG_ON(!sbio->pagev[i]); - BUG_ON(!sbio->pagev[i]->page); + WARN_ON(!sbio->pagev[i]->page); scrub_block_put(sbio->pagev[i]->sblock); } bio_put(sbio->bio); } - for (i = 0; i < SCRUB_BIOS_PER_DEV; ++i) { - struct scrub_bio *sbio = sdev->bios[i]; + for (i = 0; i < SCRUB_BIOS_PER_SCTX; ++i) { + struct scrub_bio *sbio = sctx->bios[i]; if (!sbio) break; kfree(sbio); } - scrub_free_csums(sdev); - kfree(sdev); + scrub_free_csums(sctx); + kfree(sctx); } static noinline_for_stack -struct scrub_dev *scrub_setup_dev(struct btrfs_device *dev) +struct scrub_ctx *scrub_setup_ctx(struct btrfs_device *dev, int is_dev_replace) { - struct scrub_dev *sdev; + struct scrub_ctx *sctx; int i; struct btrfs_fs_info *fs_info = dev->dev_root->fs_info; - int pages_per_bio; + int pages_per_rd_bio; + int ret; - pages_per_bio = min_t(int, SCRUB_PAGES_PER_BIO, - bio_get_nr_vecs(dev->bdev)); - sdev = kzalloc(sizeof(*sdev), GFP_NOFS); - if (!sdev) + /* + * the setting of pages_per_rd_bio is correct for scrub but might + * be wrong for the dev_replace code where we might read from + * different devices in the initial huge bios. However, that + * code is able to correctly handle the case when adding a page + * to a bio fails. + */ + if (dev->bdev) + pages_per_rd_bio = min_t(int, SCRUB_PAGES_PER_RD_BIO, + bio_get_nr_vecs(dev->bdev)); + else + pages_per_rd_bio = SCRUB_PAGES_PER_RD_BIO; + sctx = kzalloc(sizeof(*sctx), GFP_NOFS); + if (!sctx) goto nomem; - sdev->dev = dev; - sdev->pages_per_bio = pages_per_bio; - sdev->curr = -1; - for (i = 0; i < SCRUB_BIOS_PER_DEV; ++i) { + sctx->is_dev_replace = is_dev_replace; + sctx->pages_per_rd_bio = pages_per_rd_bio; + sctx->curr = -1; + sctx->dev_root = dev->dev_root; + for (i = 0; i < SCRUB_BIOS_PER_SCTX; ++i) { struct scrub_bio *sbio; sbio = kzalloc(sizeof(*sbio), GFP_NOFS); if (!sbio) goto nomem; - sdev->bios[i] = sbio; + sctx->bios[i] = sbio; sbio->index = i; - sbio->sdev = sdev; + sbio->sctx = sctx; sbio->page_count = 0; sbio->work.func = scrub_bio_end_io_worker; - if (i != SCRUB_BIOS_PER_DEV-1) - sdev->bios[i]->next_free = i + 1; + if (i != SCRUB_BIOS_PER_SCTX - 1) + sctx->bios[i]->next_free = i + 1; else - sdev->bios[i]->next_free = -1; - } - sdev->first_free = 0; - sdev->nodesize = dev->dev_root->nodesize; - sdev->leafsize = dev->dev_root->leafsize; - sdev->sectorsize = dev->dev_root->sectorsize; - atomic_set(&sdev->in_flight, 0); - atomic_set(&sdev->fixup_cnt, 0); - atomic_set(&sdev->cancel_req, 0); - sdev->csum_size = btrfs_super_csum_size(fs_info->super_copy); - INIT_LIST_HEAD(&sdev->csum_list); - - spin_lock_init(&sdev->list_lock); - spin_lock_init(&sdev->stat_lock); - init_waitqueue_head(&sdev->list_wait); - return sdev; + sctx->bios[i]->next_free = -1; + } + sctx->first_free = 0; + sctx->nodesize = dev->dev_root->nodesize; + sctx->leafsize = dev->dev_root->leafsize; + sctx->sectorsize = dev->dev_root->sectorsize; + atomic_set(&sctx->bios_in_flight, 0); + atomic_set(&sctx->workers_pending, 0); + atomic_set(&sctx->cancel_req, 0); + sctx->csum_size = btrfs_super_csum_size(fs_info->super_copy); + INIT_LIST_HEAD(&sctx->csum_list); + + spin_lock_init(&sctx->list_lock); + spin_lock_init(&sctx->stat_lock); + init_waitqueue_head(&sctx->list_wait); + + ret = scrub_setup_wr_ctx(sctx, &sctx->wr_ctx, fs_info, + fs_info->dev_replace.tgtdev, is_dev_replace); + if (ret) { + scrub_free_ctx(sctx); + return ERR_PTR(ret); + } + return sctx; nomem: - scrub_free_dev(sdev); + scrub_free_ctx(sctx); return ERR_PTR(-ENOMEM); } -static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root, void *ctx) +static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root, + void *warn_ctx) { u64 isize; u32 nlink; @@ -277,7 +428,7 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root, void *ctx) int i; struct extent_buffer *eb; struct btrfs_inode_item *inode_item; - struct scrub_warning *swarn = ctx; + struct scrub_warning *swarn = warn_ctx; struct btrfs_fs_info *fs_info = swarn->dev->dev_root->fs_info; struct inode_fs_paths *ipath = NULL; struct btrfs_root *local_root; @@ -345,8 +496,8 @@ err: static void scrub_print_warning(const char *errstr, struct scrub_block *sblock) { - struct btrfs_device *dev = sblock->sdev->dev; - struct btrfs_fs_info *fs_info = dev->dev_root->fs_info; + struct btrfs_device *dev; + struct btrfs_fs_info *fs_info; struct btrfs_path *path; struct btrfs_key found_key; struct extent_buffer *eb; @@ -361,15 +512,18 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock) const int bufsize = 4096; int ret; + WARN_ON(sblock->page_count < 1); + dev = sblock->pagev[0]->dev; + fs_info = sblock->sctx->dev_root->fs_info; + path = btrfs_alloc_path(); swarn.scratch_buf = kmalloc(bufsize, GFP_NOFS); swarn.msg_buf = kmalloc(bufsize, GFP_NOFS); - BUG_ON(sblock->page_count < 1); - swarn.sector = (sblock->pagev[0].physical) >> 9; - swarn.logical = sblock->pagev[0].logical; + swarn.sector = (sblock->pagev[0]->physical) >> 9; + swarn.logical = sblock->pagev[0]->logical; swarn.errstr = errstr; - swarn.dev = dev; + swarn.dev = NULL; swarn.msg_bufsize = bufsize; swarn.scratch_bufsize = bufsize; @@ -405,6 +559,7 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock) } while (ret != 1); } else { swarn.path = path; + swarn.dev = dev; iterate_extent_inodes(fs_info, found_key.objectid, extent_item_pos, 1, scrub_print_warning_inode, &swarn); @@ -416,11 +571,11 @@ out: kfree(swarn.msg_buf); } -static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void *ctx) +static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void *fixup_ctx) { struct page *page = NULL; unsigned long index; - struct scrub_fixup_nodatasum *fixup = ctx; + struct scrub_fixup_nodatasum *fixup = fixup_ctx; int ret; int corrected = 0; struct btrfs_key key; @@ -451,7 +606,7 @@ static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void *ctx) } if (PageUptodate(page)) { - struct btrfs_mapping_tree *map_tree; + struct btrfs_fs_info *fs_info; if (PageDirty(page)) { /* * we need to write the data to the defect sector. the @@ -472,8 +627,8 @@ static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void *ctx) ret = -EIO; goto out; } - map_tree = &BTRFS_I(inode)->root->fs_info->mapping_tree; - ret = repair_io_failure(map_tree, offset, PAGE_SIZE, + fs_info = BTRFS_I(inode)->root->fs_info; + ret = repair_io_failure(fs_info, offset, PAGE_SIZE, fixup->logical, page, fixup->mirror_num); unlock_page(page); @@ -530,21 +685,21 @@ static void scrub_fixup_nodatasum(struct btrfs_work *work) { int ret; struct scrub_fixup_nodatasum *fixup; - struct scrub_dev *sdev; + struct scrub_ctx *sctx; struct btrfs_trans_handle *trans = NULL; struct btrfs_fs_info *fs_info; struct btrfs_path *path; int uncorrectable = 0; fixup = container_of(work, struct scrub_fixup_nodatasum, work); - sdev = fixup->sdev; + sctx = fixup->sctx; fs_info = fixup->root->fs_info; path = btrfs_alloc_path(); if (!path) { - spin_lock(&sdev->stat_lock); - ++sdev->stat.malloc_errors; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + ++sctx->stat.malloc_errors; + spin_unlock(&sctx->stat_lock); uncorrectable = 1; goto out; } @@ -573,35 +728,30 @@ static void scrub_fixup_nodatasum(struct btrfs_work *work) } WARN_ON(ret != 1); - spin_lock(&sdev->stat_lock); - ++sdev->stat.corrected_errors; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + ++sctx->stat.corrected_errors; + spin_unlock(&sctx->stat_lock); out: if (trans && !IS_ERR(trans)) btrfs_end_transaction(trans, fixup->root); if (uncorrectable) { - spin_lock(&sdev->stat_lock); - ++sdev->stat.uncorrectable_errors; - spin_unlock(&sdev->stat_lock); - + spin_lock(&sctx->stat_lock); + ++sctx->stat.uncorrectable_errors; + spin_unlock(&sctx->stat_lock); + btrfs_dev_replace_stats_inc( + &sctx->dev_root->fs_info->dev_replace. + num_uncorrectable_read_errors); printk_ratelimited_in_rcu(KERN_ERR "btrfs: unable to fixup (nodatasum) error at logical %llu on dev %s\n", (unsigned long long)fixup->logical, - rcu_str_deref(sdev->dev->name)); + rcu_str_deref(fixup->dev->name)); } btrfs_free_path(path); kfree(fixup); - /* see caller why we're pretending to be paused in the scrub counters */ - mutex_lock(&fs_info->scrub_lock); - atomic_dec(&fs_info->scrubs_running); - atomic_dec(&fs_info->scrubs_paused); - mutex_unlock(&fs_info->scrub_lock); - atomic_dec(&sdev->fixup_cnt); - wake_up(&fs_info->scrub_pause_wait); - wake_up(&sdev->list_wait); + scrub_pending_trans_workers_dec(sctx); } /* @@ -614,7 +764,8 @@ out: */ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) { - struct scrub_dev *sdev = sblock_to_check->sdev; + struct scrub_ctx *sctx = sblock_to_check->sctx; + struct btrfs_device *dev; struct btrfs_fs_info *fs_info; u64 length; u64 logical; @@ -633,16 +784,33 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) DEFAULT_RATELIMIT_BURST); BUG_ON(sblock_to_check->page_count < 1); - fs_info = sdev->dev->dev_root->fs_info; + fs_info = sctx->dev_root->fs_info; + if (sblock_to_check->pagev[0]->flags & BTRFS_EXTENT_FLAG_SUPER) { + /* + * if we find an error in a super block, we just report it. + * They will get written with the next transaction commit + * anyway + */ + spin_lock(&sctx->stat_lock); + ++sctx->stat.super_errors; + spin_unlock(&sctx->stat_lock); + return 0; + } length = sblock_to_check->page_count * PAGE_SIZE; - logical = sblock_to_check->pagev[0].logical; - generation = sblock_to_check->pagev[0].generation; - BUG_ON(sblock_to_check->pagev[0].mirror_num < 1); - failed_mirror_index = sblock_to_check->pagev[0].mirror_num - 1; - is_metadata = !(sblock_to_check->pagev[0].flags & + logical = sblock_to_check->pagev[0]->logical; + generation = sblock_to_check->pagev[0]->generation; + BUG_ON(sblock_to_check->pagev[0]->mirror_num < 1); + failed_mirror_index = sblock_to_check->pagev[0]->mirror_num - 1; + is_metadata = !(sblock_to_check->pagev[0]->flags & BTRFS_EXTENT_FLAG_DATA); - have_csum = sblock_to_check->pagev[0].have_csum; - csum = sblock_to_check->pagev[0].csum; + have_csum = sblock_to_check->pagev[0]->have_csum; + csum = sblock_to_check->pagev[0]->csum; + dev = sblock_to_check->pagev[0]->dev; + + if (sctx->is_dev_replace && !is_metadata && !have_csum) { + sblocks_for_recheck = NULL; + goto nodatasum_case; + } /* * read all mirrors one after the other. This includes to @@ -677,43 +845,32 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) sizeof(*sblocks_for_recheck), GFP_NOFS); if (!sblocks_for_recheck) { - spin_lock(&sdev->stat_lock); - sdev->stat.malloc_errors++; - sdev->stat.read_errors++; - sdev->stat.uncorrectable_errors++; - spin_unlock(&sdev->stat_lock); - btrfs_dev_stat_inc_and_print(sdev->dev, - BTRFS_DEV_STAT_READ_ERRS); + spin_lock(&sctx->stat_lock); + sctx->stat.malloc_errors++; + sctx->stat.read_errors++; + sctx->stat.uncorrectable_errors++; + spin_unlock(&sctx->stat_lock); + btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS); goto out; } /* setup the context, map the logical blocks and alloc the pages */ - ret = scrub_setup_recheck_block(sdev, &fs_info->mapping_tree, length, + ret = scrub_setup_recheck_block(sctx, fs_info, sblock_to_check, length, logical, sblocks_for_recheck); if (ret) { - spin_lock(&sdev->stat_lock); - sdev->stat.read_errors++; - sdev->stat.uncorrectable_errors++; - spin_unlock(&sdev->stat_lock); - btrfs_dev_stat_inc_and_print(sdev->dev, - BTRFS_DEV_STAT_READ_ERRS); + spin_lock(&sctx->stat_lock); + sctx->stat.read_errors++; + sctx->stat.uncorrectable_errors++; + spin_unlock(&sctx->stat_lock); + btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS); goto out; } BUG_ON(failed_mirror_index >= BTRFS_MAX_MIRRORS); sblock_bad = sblocks_for_recheck + failed_mirror_index; /* build and submit the bios for the failed mirror, check checksums */ - ret = scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum, - csum, generation, sdev->csum_size); - if (ret) { - spin_lock(&sdev->stat_lock); - sdev->stat.read_errors++; - sdev->stat.uncorrectable_errors++; - spin_unlock(&sdev->stat_lock); - btrfs_dev_stat_inc_and_print(sdev->dev, - BTRFS_DEV_STAT_READ_ERRS); - goto out; - } + scrub_recheck_block(fs_info, sblock_bad, is_metadata, have_csum, + csum, generation, sctx->csum_size); if (!sblock_bad->header_error && !sblock_bad->checksum_error && sblock_bad->no_io_error_seen) { @@ -725,50 +882,54 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) * different bio (usually one of the two latter cases is * the cause) */ - spin_lock(&sdev->stat_lock); - sdev->stat.unverified_errors++; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + sctx->stat.unverified_errors++; + spin_unlock(&sctx->stat_lock); + if (sctx->is_dev_replace) + scrub_write_block_to_dev_replace(sblock_bad); goto out; } if (!sblock_bad->no_io_error_seen) { - spin_lock(&sdev->stat_lock); - sdev->stat.read_errors++; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + sctx->stat.read_errors++; + spin_unlock(&sctx->stat_lock); if (__ratelimit(&_rs)) scrub_print_warning("i/o error", sblock_to_check); - btrfs_dev_stat_inc_and_print(sdev->dev, - BTRFS_DEV_STAT_READ_ERRS); + btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_READ_ERRS); } else if (sblock_bad->checksum_error) { - spin_lock(&sdev->stat_lock); - sdev->stat.csum_errors++; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + sctx->stat.csum_errors++; + spin_unlock(&sctx->stat_lock); if (__ratelimit(&_rs)) scrub_print_warning("checksum error", sblock_to_check); - btrfs_dev_stat_inc_and_print(sdev->dev, + btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_CORRUPTION_ERRS); } else if (sblock_bad->header_error) { - spin_lock(&sdev->stat_lock); - sdev->stat.verify_errors++; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + sctx->stat.verify_errors++; + spin_unlock(&sctx->stat_lock); if (__ratelimit(&_rs)) scrub_print_warning("checksum/header error", sblock_to_check); if (sblock_bad->generation_error) - btrfs_dev_stat_inc_and_print(sdev->dev, + btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_GENERATION_ERRS); else - btrfs_dev_stat_inc_and_print(sdev->dev, + btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_CORRUPTION_ERRS); } - if (sdev->readonly) + if (sctx->readonly && !sctx->is_dev_replace) goto did_not_correct_error; if (!is_metadata && !have_csum) { struct scrub_fixup_nodatasum *fixup_nodatasum; +nodatasum_case: + WARN_ON(sctx->is_dev_replace); + /* * !is_metadata and !have_csum, this means that the data * might not be COW'ed, that it might be modified @@ -779,24 +940,12 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) fixup_nodatasum = kzalloc(sizeof(*fixup_nodatasum), GFP_NOFS); if (!fixup_nodatasum) goto did_not_correct_error; - fixup_nodatasum->sdev = sdev; + fixup_nodatasum->sctx = sctx; + fixup_nodatasum->dev = dev; fixup_nodatasum->logical = logical; fixup_nodatasum->root = fs_info->extent_root; fixup_nodatasum->mirror_num = failed_mirror_index + 1; - /* - * increment scrubs_running to prevent cancel requests from - * completing as long as a fixup worker is running. we must also - * increment scrubs_paused to prevent deadlocking on pause - * requests used for transactions commits (as the worker uses a - * transaction context). it is safe to regard the fixup worker - * as paused for all matters practical. effectively, we only - * avoid cancellation requests from completing. - */ - mutex_lock(&fs_info->scrub_lock); - atomic_inc(&fs_info->scrubs_running); - atomic_inc(&fs_info->scrubs_paused); - mutex_unlock(&fs_info->scrub_lock); - atomic_inc(&sdev->fixup_cnt); + scrub_pending_trans_workers_inc(sctx); fixup_nodatasum->work.func = scrub_fixup_nodatasum; btrfs_queue_worker(&fs_info->scrub_workers, &fixup_nodatasum->work); @@ -805,26 +954,8 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) /* * now build and submit the bios for the other mirrors, check - * checksums - */ - for (mirror_index = 0; - mirror_index < BTRFS_MAX_MIRRORS && - sblocks_for_recheck[mirror_index].page_count > 0; - mirror_index++) { - if (mirror_index == failed_mirror_index) - continue; - - /* build and submit the bios, check checksums */ - ret = scrub_recheck_block(fs_info, - sblocks_for_recheck + mirror_index, - is_metadata, have_csum, csum, - generation, sdev->csum_size); - if (ret) - goto did_not_correct_error; - } - - /* - * first try to pick the mirror which is completely without I/O + * checksums. + * First try to pick the mirror which is completely without I/O * errors and also does not have a checksum error. * If one is found, and if a checksum is present, the full block * that is known to contain an error is rewritten. Afterwards @@ -840,24 +971,93 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) mirror_index < BTRFS_MAX_MIRRORS && sblocks_for_recheck[mirror_index].page_count > 0; mirror_index++) { - struct scrub_block *sblock_other = sblocks_for_recheck + - mirror_index; + struct scrub_block *sblock_other; + + if (mirror_index == failed_mirror_index) + continue; + sblock_other = sblocks_for_recheck + mirror_index; + + /* build and submit the bios, check checksums */ + scrub_recheck_block(fs_info, sblock_other, is_metadata, + have_csum, csum, generation, + sctx->csum_size); if (!sblock_other->header_error && !sblock_other->checksum_error && sblock_other->no_io_error_seen) { - int force_write = is_metadata || have_csum; - - ret = scrub_repair_block_from_good_copy(sblock_bad, - sblock_other, - force_write); + if (sctx->is_dev_replace) { + scrub_write_block_to_dev_replace(sblock_other); + } else { + int force_write = is_metadata || have_csum; + + ret = scrub_repair_block_from_good_copy( + sblock_bad, sblock_other, + force_write); + } if (0 == ret) goto corrected_error; } } /* - * in case of I/O errors in the area that is supposed to be + * for dev_replace, pick good pages and write to the target device. + */ + if (sctx->is_dev_replace) { + success = 1; + for (page_num = 0; page_num < sblock_bad->page_count; + page_num++) { + int sub_success; + + sub_success = 0; + for (mirror_index = 0; + mirror_index < BTRFS_MAX_MIRRORS && + sblocks_for_recheck[mirror_index].page_count > 0; + mirror_index++) { + struct scrub_block *sblock_other = + sblocks_for_recheck + mirror_index; + struct scrub_page *page_other = + sblock_other->pagev[page_num]; + + if (!page_other->io_error) { + ret = scrub_write_page_to_dev_replace( + sblock_other, page_num); + if (ret == 0) { + /* succeeded for this page */ + sub_success = 1; + break; + } else { + btrfs_dev_replace_stats_inc( + &sctx->dev_root-> + fs_info->dev_replace. + num_write_errors); + } + } + } + + if (!sub_success) { + /* + * did not find a mirror to fetch the page + * from. scrub_write_page_to_dev_replace() + * handles this case (page->io_error), by + * filling the block with zeros before + * submitting the write request + */ + success = 0; + ret = scrub_write_page_to_dev_replace( + sblock_bad, page_num); + if (ret) + btrfs_dev_replace_stats_inc( + &sctx->dev_root->fs_info-> + dev_replace.num_write_errors); + } + } + + goto out; + } + + /* + * for regular scrub, repair those pages that are errored. + * In case of I/O errors in the area that is supposed to be * repaired, continue by picking good copies of those pages. * Select the good pages from mirrors to rewrite bad pages from * the area to fix. Afterwards verify the checksum of the block @@ -887,7 +1087,7 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) success = 1; for (page_num = 0; page_num < sblock_bad->page_count; page_num++) { - struct scrub_page *page_bad = sblock_bad->pagev + page_num; + struct scrub_page *page_bad = sblock_bad->pagev[page_num]; if (!page_bad->io_error) continue; @@ -898,8 +1098,8 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) mirror_index++) { struct scrub_block *sblock_other = sblocks_for_recheck + mirror_index; - struct scrub_page *page_other = sblock_other->pagev + - page_num; + struct scrub_page *page_other = sblock_other->pagev[ + page_num]; if (!page_other->io_error) { ret = scrub_repair_page_from_good_copy( @@ -928,10 +1128,10 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) * is verified, but most likely the data comes out * of the page cache. */ - ret = scrub_recheck_block(fs_info, sblock_bad, - is_metadata, have_csum, csum, - generation, sdev->csum_size); - if (!ret && !sblock_bad->header_error && + scrub_recheck_block(fs_info, sblock_bad, + is_metadata, have_csum, csum, + generation, sctx->csum_size); + if (!sblock_bad->header_error && !sblock_bad->checksum_error && sblock_bad->no_io_error_seen) goto corrected_error; @@ -939,23 +1139,23 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check) goto did_not_correct_error; } else { corrected_error: - spin_lock(&sdev->stat_lock); - sdev->stat.corrected_errors++; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + sctx->stat.corrected_errors++; + spin_unlock(&sctx->stat_lock); printk_ratelimited_in_rcu(KERN_ERR "btrfs: fixed up error at logical %llu on dev %s\n", (unsigned long long)logical, - rcu_str_deref(sdev->dev->name)); + rcu_str_deref(dev->name)); } } else { did_not_correct_error: - spin_lock(&sdev->stat_lock); - sdev->stat.uncorrectable_errors++; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + sctx->stat.uncorrectable_errors++; + spin_unlock(&sctx->stat_lock); printk_ratelimited_in_rcu(KERN_ERR "btrfs: unable to fixup (regular) error at logical %llu on dev %s\n", (unsigned long long)logical, - rcu_str_deref(sdev->dev->name)); + rcu_str_deref(dev->name)); } out: @@ -966,11 +1166,11 @@ out: mirror_index; int page_index; - for (page_index = 0; page_index < SCRUB_PAGES_PER_BIO; - page_index++) - if (sblock->pagev[page_index].page) - __free_page( - sblock->pagev[page_index].page); + for (page_index = 0; page_index < sblock->page_count; + page_index++) { + sblock->pagev[page_index]->sblock = NULL; + scrub_page_put(sblock->pagev[page_index]); + } } kfree(sblocks_for_recheck); } @@ -978,8 +1178,9 @@ out: return 0; } -static int scrub_setup_recheck_block(struct scrub_dev *sdev, - struct btrfs_mapping_tree *map_tree, +static int scrub_setup_recheck_block(struct scrub_ctx *sctx, + struct btrfs_fs_info *fs_info, + struct scrub_block *original_sblock, u64 length, u64 logical, struct scrub_block *sblocks_for_recheck) { @@ -988,7 +1189,7 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev, int ret; /* - * note: the three members sdev, ref_count and outstanding_pages + * note: the two members ref_count and outstanding_pages * are not used (and not set) in the blocks that are used for * the recheck procedure */ @@ -1003,14 +1204,14 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev, * with a length of PAGE_SIZE, each returned stripe * represents one mirror */ - ret = btrfs_map_block(map_tree, WRITE, logical, &mapped_length, - &bbio, 0); + ret = btrfs_map_block(fs_info, REQ_GET_READ_MIRRORS, logical, + &mapped_length, &bbio, 0); if (ret || !bbio || mapped_length < sublen) { kfree(bbio); return -EIO; } - BUG_ON(page_index >= SCRUB_PAGES_PER_BIO); + BUG_ON(page_index >= SCRUB_PAGES_PER_RD_BIO); for (mirror_index = 0; mirror_index < (int)bbio->num_stripes; mirror_index++) { struct scrub_block *sblock; @@ -1020,21 +1221,31 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev, continue; sblock = sblocks_for_recheck + mirror_index; - page = sblock->pagev + page_index; + sblock->sctx = sctx; + page = kzalloc(sizeof(*page), GFP_NOFS); + if (!page) { +leave_nomem: + spin_lock(&sctx->stat_lock); + sctx->stat.malloc_errors++; + spin_unlock(&sctx->stat_lock); + kfree(bbio); + return -ENOMEM; + } + scrub_page_get(page); + sblock->pagev[page_index] = page; page->logical = logical; page->physical = bbio->stripes[mirror_index].physical; + BUG_ON(page_index >= original_sblock->page_count); + page->physical_for_dev_replace = + original_sblock->pagev[page_index]-> + physical_for_dev_replace; /* for missing devices, dev->bdev is NULL */ page->dev = bbio->stripes[mirror_index].dev; page->mirror_num = mirror_index + 1; - page->page = alloc_page(GFP_NOFS); - if (!page->page) { - spin_lock(&sdev->stat_lock); - sdev->stat.malloc_errors++; - spin_unlock(&sdev->stat_lock); - kfree(bbio); - return -ENOMEM; - } sblock->page_count++; + page->page = alloc_page(GFP_NOFS); + if (!page->page) + goto leave_nomem; } kfree(bbio); length -= sublen; @@ -1052,10 +1263,10 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev, * to take those pages that are not errored from all the mirrors so that * the pages that are errored in the just handled mirror can be repaired. */ -static int scrub_recheck_block(struct btrfs_fs_info *fs_info, - struct scrub_block *sblock, int is_metadata, - int have_csum, u8 *csum, u64 generation, - u16 csum_size) +static void scrub_recheck_block(struct btrfs_fs_info *fs_info, + struct scrub_block *sblock, int is_metadata, + int have_csum, u8 *csum, u64 generation, + u16 csum_size) { int page_num; @@ -1065,8 +1276,7 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info, for (page_num = 0; page_num < sblock->page_count; page_num++) { struct bio *bio; - int ret; - struct scrub_page *page = sblock->pagev + page_num; + struct scrub_page *page = sblock->pagev[page_num]; DECLARE_COMPLETION_ONSTACK(complete); if (page->dev->bdev == NULL) { @@ -1075,20 +1285,19 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info, continue; } - BUG_ON(!page->page); + WARN_ON(!page->page); bio = bio_alloc(GFP_NOFS, 1); - if (!bio) - return -EIO; + if (!bio) { + page->io_error = 1; + sblock->no_io_error_seen = 0; + continue; + } bio->bi_bdev = page->dev->bdev; bio->bi_sector = page->physical >> 9; bio->bi_end_io = scrub_complete_bio_end_io; bio->bi_private = &complete; - ret = bio_add_page(bio, page->page, PAGE_SIZE, 0); - if (PAGE_SIZE != ret) { - bio_put(bio); - return -EIO; - } + bio_add_page(bio, page->page, PAGE_SIZE, 0); btrfsic_submit_bio(READ, bio); /* this will also unplug the queue */ @@ -1105,7 +1314,7 @@ static int scrub_recheck_block(struct btrfs_fs_info *fs_info, have_csum, csum, generation, csum_size); - return 0; + return; } static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info, @@ -1120,14 +1329,14 @@ static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info, struct btrfs_root *root = fs_info->extent_root; void *mapped_buffer; - BUG_ON(!sblock->pagev[0].page); + WARN_ON(!sblock->pagev[0]->page); if (is_metadata) { struct btrfs_header *h; - mapped_buffer = kmap_atomic(sblock->pagev[0].page); + mapped_buffer = kmap_atomic(sblock->pagev[0]->page); h = (struct btrfs_header *)mapped_buffer; - if (sblock->pagev[0].logical != le64_to_cpu(h->bytenr) || + if (sblock->pagev[0]->logical != le64_to_cpu(h->bytenr) || memcmp(h->fsid, fs_info->fsid, BTRFS_UUID_SIZE) || memcmp(h->chunk_tree_uuid, fs_info->chunk_tree_uuid, BTRFS_UUID_SIZE)) { @@ -1141,7 +1350,7 @@ static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info, if (!have_csum) return; - mapped_buffer = kmap_atomic(sblock->pagev[0].page); + mapped_buffer = kmap_atomic(sblock->pagev[0]->page); } for (page_num = 0;;) { @@ -1157,9 +1366,9 @@ static void scrub_recheck_block_checksum(struct btrfs_fs_info *fs_info, page_num++; if (page_num >= sblock->page_count) break; - BUG_ON(!sblock->pagev[page_num].page); + WARN_ON(!sblock->pagev[page_num]->page); - mapped_buffer = kmap_atomic(sblock->pagev[page_num].page); + mapped_buffer = kmap_atomic(sblock->pagev[page_num]->page); } btrfs_csum_final(crc, calculated_csum); @@ -1197,17 +1406,23 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad, struct scrub_block *sblock_good, int page_num, int force_write) { - struct scrub_page *page_bad = sblock_bad->pagev + page_num; - struct scrub_page *page_good = sblock_good->pagev + page_num; + struct scrub_page *page_bad = sblock_bad->pagev[page_num]; + struct scrub_page *page_good = sblock_good->pagev[page_num]; - BUG_ON(sblock_bad->pagev[page_num].page == NULL); - BUG_ON(sblock_good->pagev[page_num].page == NULL); + BUG_ON(page_bad->page == NULL); + BUG_ON(page_good->page == NULL); if (force_write || sblock_bad->header_error || sblock_bad->checksum_error || page_bad->io_error) { struct bio *bio; int ret; DECLARE_COMPLETION_ONSTACK(complete); + if (!page_bad->dev->bdev) { + printk_ratelimited(KERN_WARNING + "btrfs: scrub_repair_page_from_good_copy(bdev == NULL) is unexpected!\n"); + return -EIO; + } + bio = bio_alloc(GFP_NOFS, 1); if (!bio) return -EIO; @@ -1228,6 +1443,9 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad, if (!bio_flagged(bio, BIO_UPTODATE)) { btrfs_dev_stat_inc_and_print(page_bad->dev, BTRFS_DEV_STAT_WRITE_ERRS); + btrfs_dev_replace_stats_inc( + &sblock_bad->sctx->dev_root->fs_info-> + dev_replace.num_write_errors); bio_put(bio); return -EIO; } @@ -1237,13 +1455,174 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad, return 0; } -static void scrub_checksum(struct scrub_block *sblock) +static void scrub_write_block_to_dev_replace(struct scrub_block *sblock) +{ + int page_num; + + for (page_num = 0; page_num < sblock->page_count; page_num++) { + int ret; + + ret = scrub_write_page_to_dev_replace(sblock, page_num); + if (ret) + btrfs_dev_replace_stats_inc( + &sblock->sctx->dev_root->fs_info->dev_replace. + num_write_errors); + } +} + +static int scrub_write_page_to_dev_replace(struct scrub_block *sblock, + int page_num) +{ + struct scrub_page *spage = sblock->pagev[page_num]; + + BUG_ON(spage->page == NULL); + if (spage->io_error) { + void *mapped_buffer = kmap_atomic(spage->page); + + memset(mapped_buffer, 0, PAGE_CACHE_SIZE); + flush_dcache_page(spage->page); + kunmap_atomic(mapped_buffer); + } + return scrub_add_page_to_wr_bio(sblock->sctx, spage); +} + +static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx, + struct scrub_page *spage) +{ + struct scrub_wr_ctx *wr_ctx = &sctx->wr_ctx; + struct scrub_bio *sbio; + int ret; + + mutex_lock(&wr_ctx->wr_lock); +again: + if (!wr_ctx->wr_curr_bio) { + wr_ctx->wr_curr_bio = kzalloc(sizeof(*wr_ctx->wr_curr_bio), + GFP_NOFS); + if (!wr_ctx->wr_curr_bio) { + mutex_unlock(&wr_ctx->wr_lock); + return -ENOMEM; + } + wr_ctx->wr_curr_bio->sctx = sctx; + wr_ctx->wr_curr_bio->page_count = 0; + } + sbio = wr_ctx->wr_curr_bio; + if (sbio->page_count == 0) { + struct bio *bio; + + sbio->physical = spage->physical_for_dev_replace; + sbio->logical = spage->logical; + sbio->dev = wr_ctx->tgtdev; + bio = sbio->bio; + if (!bio) { + bio = bio_alloc(GFP_NOFS, wr_ctx->pages_per_wr_bio); + if (!bio) { + mutex_unlock(&wr_ctx->wr_lock); + return -ENOMEM; + } + sbio->bio = bio; + } + + bio->bi_private = sbio; + bio->bi_end_io = scrub_wr_bio_end_io; + bio->bi_bdev = sbio->dev->bdev; + bio->bi_sector = sbio->physical >> 9; + sbio->err = 0; + } else if (sbio->physical + sbio->page_count * PAGE_SIZE != + spage->physical_for_dev_replace || + sbio->logical + sbio->page_count * PAGE_SIZE != + spage->logical) { + scrub_wr_submit(sctx); + goto again; + } + + ret = bio_add_page(sbio->bio, spage->page, PAGE_SIZE, 0); + if (ret != PAGE_SIZE) { + if (sbio->page_count < 1) { + bio_put(sbio->bio); + sbio->bio = NULL; + mutex_unlock(&wr_ctx->wr_lock); + return -EIO; + } + scrub_wr_submit(sctx); + goto again; + } + + sbio->pagev[sbio->page_count] = spage; + scrub_page_get(spage); + sbio->page_count++; + if (sbio->page_count == wr_ctx->pages_per_wr_bio) + scrub_wr_submit(sctx); + mutex_unlock(&wr_ctx->wr_lock); + + return 0; +} + +static void scrub_wr_submit(struct scrub_ctx *sctx) +{ + struct scrub_wr_ctx *wr_ctx = &sctx->wr_ctx; + struct scrub_bio *sbio; + + if (!wr_ctx->wr_curr_bio) + return; + + sbio = wr_ctx->wr_curr_bio; + wr_ctx->wr_curr_bio = NULL; + WARN_ON(!sbio->bio->bi_bdev); + scrub_pending_bio_inc(sctx); + /* process all writes in a single worker thread. Then the block layer + * orders the requests before sending them to the driver which + * doubled the write performance on spinning disks when measured + * with Linux 3.5 */ + btrfsic_submit_bio(WRITE, sbio->bio); +} + +static void scrub_wr_bio_end_io(struct bio *bio, int err) +{ + struct scrub_bio *sbio = bio->bi_private; + struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info; + + sbio->err = err; + sbio->bio = bio; + + sbio->work.func = scrub_wr_bio_end_io_worker; + btrfs_queue_worker(&fs_info->scrub_wr_completion_workers, &sbio->work); +} + +static void scrub_wr_bio_end_io_worker(struct btrfs_work *work) +{ + struct scrub_bio *sbio = container_of(work, struct scrub_bio, work); + struct scrub_ctx *sctx = sbio->sctx; + int i; + + WARN_ON(sbio->page_count > SCRUB_PAGES_PER_WR_BIO); + if (sbio->err) { + struct btrfs_dev_replace *dev_replace = + &sbio->sctx->dev_root->fs_info->dev_replace; + + for (i = 0; i < sbio->page_count; i++) { + struct scrub_page *spage = sbio->pagev[i]; + + spage->io_error = 1; + btrfs_dev_replace_stats_inc(&dev_replace-> + num_write_errors); + } + } + + for (i = 0; i < sbio->page_count; i++) + scrub_page_put(sbio->pagev[i]); + + bio_put(sbio->bio); + kfree(sbio); + scrub_pending_bio_dec(sctx); +} + +static int scrub_checksum(struct scrub_block *sblock) { u64 flags; int ret; - BUG_ON(sblock->page_count < 1); - flags = sblock->pagev[0].flags; + WARN_ON(sblock->page_count < 1); + flags = sblock->pagev[0]->flags; ret = 0; if (flags & BTRFS_EXTENT_FLAG_DATA) ret = scrub_checksum_data(sblock); @@ -1255,30 +1634,32 @@ static void scrub_checksum(struct scrub_block *sblock) WARN_ON(1); if (ret) scrub_handle_errored_block(sblock); + + return ret; } static int scrub_checksum_data(struct scrub_block *sblock) { - struct scrub_dev *sdev = sblock->sdev; + struct scrub_ctx *sctx = sblock->sctx; u8 csum[BTRFS_CSUM_SIZE]; u8 *on_disk_csum; struct page *page; void *buffer; u32 crc = ~(u32)0; int fail = 0; - struct btrfs_root *root = sdev->dev->dev_root; + struct btrfs_root *root = sctx->dev_root; u64 len; int index; BUG_ON(sblock->page_count < 1); - if (!sblock->pagev[0].have_csum) + if (!sblock->pagev[0]->have_csum) return 0; - on_disk_csum = sblock->pagev[0].csum; - page = sblock->pagev[0].page; + on_disk_csum = sblock->pagev[0]->csum; + page = sblock->pagev[0]->page; buffer = kmap_atomic(page); - len = sdev->sectorsize; + len = sctx->sectorsize; index = 0; for (;;) { u64 l = min_t(u64, len, PAGE_SIZE); @@ -1290,13 +1671,13 @@ static int scrub_checksum_data(struct scrub_block *sblock) break; index++; BUG_ON(index >= sblock->page_count); - BUG_ON(!sblock->pagev[index].page); - page = sblock->pagev[index].page; + BUG_ON(!sblock->pagev[index]->page); + page = sblock->pagev[index]->page; buffer = kmap_atomic(page); } btrfs_csum_final(crc, csum); - if (memcmp(csum, on_disk_csum, sdev->csum_size)) + if (memcmp(csum, on_disk_csum, sctx->csum_size)) fail = 1; return fail; @@ -1304,9 +1685,9 @@ static int scrub_checksum_data(struct scrub_block *sblock) static int scrub_checksum_tree_block(struct scrub_block *sblock) { - struct scrub_dev *sdev = sblock->sdev; + struct scrub_ctx *sctx = sblock->sctx; struct btrfs_header *h; - struct btrfs_root *root = sdev->dev->dev_root; + struct btrfs_root *root = sctx->dev_root; struct btrfs_fs_info *fs_info = root->fs_info; u8 calculated_csum[BTRFS_CSUM_SIZE]; u8 on_disk_csum[BTRFS_CSUM_SIZE]; @@ -1321,10 +1702,10 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock) int index; BUG_ON(sblock->page_count < 1); - page = sblock->pagev[0].page; + page = sblock->pagev[0]->page; mapped_buffer = kmap_atomic(page); h = (struct btrfs_header *)mapped_buffer; - memcpy(on_disk_csum, h->csum, sdev->csum_size); + memcpy(on_disk_csum, h->csum, sctx->csum_size); /* * we don't use the getter functions here, as we @@ -1332,10 +1713,10 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock) * b) the page is already kmapped */ - if (sblock->pagev[0].logical != le64_to_cpu(h->bytenr)) + if (sblock->pagev[0]->logical != le64_to_cpu(h->bytenr)) ++fail; - if (sblock->pagev[0].generation != le64_to_cpu(h->generation)) + if (sblock->pagev[0]->generation != le64_to_cpu(h->generation)) ++fail; if (memcmp(h->fsid, fs_info->fsid, BTRFS_UUID_SIZE)) @@ -1345,8 +1726,8 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock) BTRFS_UUID_SIZE)) ++fail; - BUG_ON(sdev->nodesize != sdev->leafsize); - len = sdev->nodesize - BTRFS_CSUM_SIZE; + WARN_ON(sctx->nodesize != sctx->leafsize); + len = sctx->nodesize - BTRFS_CSUM_SIZE; mapped_size = PAGE_SIZE - BTRFS_CSUM_SIZE; p = ((u8 *)mapped_buffer) + BTRFS_CSUM_SIZE; index = 0; @@ -1360,15 +1741,15 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock) break; index++; BUG_ON(index >= sblock->page_count); - BUG_ON(!sblock->pagev[index].page); - page = sblock->pagev[index].page; + BUG_ON(!sblock->pagev[index]->page); + page = sblock->pagev[index]->page; mapped_buffer = kmap_atomic(page); mapped_size = PAGE_SIZE; p = mapped_buffer; } btrfs_csum_final(crc, calculated_csum); - if (memcmp(calculated_csum, on_disk_csum, sdev->csum_size)) + if (memcmp(calculated_csum, on_disk_csum, sctx->csum_size)) ++crc_fail; return fail || crc_fail; @@ -1377,8 +1758,8 @@ static int scrub_checksum_tree_block(struct scrub_block *sblock) static int scrub_checksum_super(struct scrub_block *sblock) { struct btrfs_super_block *s; - struct scrub_dev *sdev = sblock->sdev; - struct btrfs_root *root = sdev->dev->dev_root; + struct scrub_ctx *sctx = sblock->sctx; + struct btrfs_root *root = sctx->dev_root; struct btrfs_fs_info *fs_info = root->fs_info; u8 calculated_csum[BTRFS_CSUM_SIZE]; u8 on_disk_csum[BTRFS_CSUM_SIZE]; @@ -1393,15 +1774,15 @@ static int scrub_checksum_super(struct scrub_block *sblock) int index; BUG_ON(sblock->page_count < 1); - page = sblock->pagev[0].page; + page = sblock->pagev[0]->page; mapped_buffer = kmap_atomic(page); s = (struct btrfs_super_block *)mapped_buffer; - memcpy(on_disk_csum, s->csum, sdev->csum_size); + memcpy(on_disk_csum, s->csum, sctx->csum_size); - if (sblock->pagev[0].logical != le64_to_cpu(s->bytenr)) + if (sblock->pagev[0]->logical != le64_to_cpu(s->bytenr)) ++fail_cor; - if (sblock->pagev[0].generation != le64_to_cpu(s->generation)) + if (sblock->pagev[0]->generation != le64_to_cpu(s->generation)) ++fail_gen; if (memcmp(s->fsid, fs_info->fsid, BTRFS_UUID_SIZE)) @@ -1421,15 +1802,15 @@ static int scrub_checksum_super(struct scrub_block *sblock) break; index++; BUG_ON(index >= sblock->page_count); - BUG_ON(!sblock->pagev[index].page); - page = sblock->pagev[index].page; + BUG_ON(!sblock->pagev[index]->page); + page = sblock->pagev[index]->page; mapped_buffer = kmap_atomic(page); mapped_size = PAGE_SIZE; p = mapped_buffer; } btrfs_csum_final(crc, calculated_csum); - if (memcmp(calculated_csum, on_disk_csum, sdev->csum_size)) + if (memcmp(calculated_csum, on_disk_csum, sctx->csum_size)) ++fail_cor; if (fail_cor + fail_gen) { @@ -1438,14 +1819,14 @@ static int scrub_checksum_super(struct scrub_block *sblock) * They will get written with the next transaction commit * anyway */ - spin_lock(&sdev->stat_lock); - ++sdev->stat.super_errors; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + ++sctx->stat.super_errors; + spin_unlock(&sctx->stat_lock); if (fail_cor) - btrfs_dev_stat_inc_and_print(sdev->dev, + btrfs_dev_stat_inc_and_print(sblock->pagev[0]->dev, BTRFS_DEV_STAT_CORRUPTION_ERRS); else - btrfs_dev_stat_inc_and_print(sdev->dev, + btrfs_dev_stat_inc_and_print(sblock->pagev[0]->dev, BTRFS_DEV_STAT_GENERATION_ERRS); } @@ -1463,28 +1844,54 @@ static void scrub_block_put(struct scrub_block *sblock) int i; for (i = 0; i < sblock->page_count; i++) - if (sblock->pagev[i].page) - __free_page(sblock->pagev[i].page); + scrub_page_put(sblock->pagev[i]); kfree(sblock); } } -static void scrub_submit(struct scrub_dev *sdev) +static void scrub_page_get(struct scrub_page *spage) +{ + atomic_inc(&spage->ref_count); +} + +static void scrub_page_put(struct scrub_page *spage) +{ + if (atomic_dec_and_test(&spage->ref_count)) { + if (spage->page) + __free_page(spage->page); + kfree(spage); + } +} + +static void scrub_submit(struct scrub_ctx *sctx) { struct scrub_bio *sbio; - if (sdev->curr == -1) + if (sctx->curr == -1) return; - sbio = sdev->bios[sdev->curr]; - sdev->curr = -1; - atomic_inc(&sdev->in_flight); + sbio = sctx->bios[sctx->curr]; + sctx->curr = -1; + scrub_pending_bio_inc(sctx); - btrfsic_submit_bio(READ, sbio->bio); + if (!sbio->bio->bi_bdev) { + /* + * this case should not happen. If btrfs_map_block() is + * wrong, it could happen for dev-replace operations on + * missing devices when no mirrors are available, but in + * this case it should already fail the mount. + * This case is handled correctly (but _very_ slowly). + */ + printk_ratelimited(KERN_WARNING + "btrfs: scrub_submit(bio bdev == NULL) is unexpected!\n"); + bio_endio(sbio->bio, -EIO); + } else { + btrfsic_submit_bio(READ, sbio->bio); + } } -static int scrub_add_page_to_bio(struct scrub_dev *sdev, - struct scrub_page *spage) +static int scrub_add_page_to_rd_bio(struct scrub_ctx *sctx, + struct scrub_page *spage) { struct scrub_block *sblock = spage->sblock; struct scrub_bio *sbio; @@ -1494,28 +1901,29 @@ again: /* * grab a fresh bio or wait for one to become available */ - while (sdev->curr == -1) { - spin_lock(&sdev->list_lock); - sdev->curr = sdev->first_free; - if (sdev->curr != -1) { - sdev->first_free = sdev->bios[sdev->curr]->next_free; - sdev->bios[sdev->curr]->next_free = -1; - sdev->bios[sdev->curr]->page_count = 0; - spin_unlock(&sdev->list_lock); + while (sctx->curr == -1) { + spin_lock(&sctx->list_lock); + sctx->curr = sctx->first_free; + if (sctx->curr != -1) { + sctx->first_free = sctx->bios[sctx->curr]->next_free; + sctx->bios[sctx->curr]->next_free = -1; + sctx->bios[sctx->curr]->page_count = 0; + spin_unlock(&sctx->list_lock); } else { - spin_unlock(&sdev->list_lock); - wait_event(sdev->list_wait, sdev->first_free != -1); + spin_unlock(&sctx->list_lock); + wait_event(sctx->list_wait, sctx->first_free != -1); } } - sbio = sdev->bios[sdev->curr]; + sbio = sctx->bios[sctx->curr]; if (sbio->page_count == 0) { struct bio *bio; sbio->physical = spage->physical; sbio->logical = spage->logical; + sbio->dev = spage->dev; bio = sbio->bio; if (!bio) { - bio = bio_alloc(GFP_NOFS, sdev->pages_per_bio); + bio = bio_alloc(GFP_NOFS, sctx->pages_per_rd_bio); if (!bio) return -ENOMEM; sbio->bio = bio; @@ -1523,14 +1931,15 @@ again: bio->bi_private = sbio; bio->bi_end_io = scrub_bio_end_io; - bio->bi_bdev = sdev->dev->bdev; - bio->bi_sector = spage->physical >> 9; + bio->bi_bdev = sbio->dev->bdev; + bio->bi_sector = sbio->physical >> 9; sbio->err = 0; } else if (sbio->physical + sbio->page_count * PAGE_SIZE != spage->physical || sbio->logical + sbio->page_count * PAGE_SIZE != - spage->logical) { - scrub_submit(sdev); + spage->logical || + sbio->dev != spage->dev) { + scrub_submit(sctx); goto again; } @@ -1542,81 +1951,87 @@ again: sbio->bio = NULL; return -EIO; } - scrub_submit(sdev); + scrub_submit(sctx); goto again; } - scrub_block_get(sblock); /* one for the added page */ + scrub_block_get(sblock); /* one for the page added to the bio */ atomic_inc(&sblock->outstanding_pages); sbio->page_count++; - if (sbio->page_count == sdev->pages_per_bio) - scrub_submit(sdev); + if (sbio->page_count == sctx->pages_per_rd_bio) + scrub_submit(sctx); return 0; } -static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len, - u64 physical, u64 flags, u64 gen, int mirror_num, - u8 *csum, int force) +static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len, + u64 physical, struct btrfs_device *dev, u64 flags, + u64 gen, int mirror_num, u8 *csum, int force, + u64 physical_for_dev_replace) { struct scrub_block *sblock; int index; sblock = kzalloc(sizeof(*sblock), GFP_NOFS); if (!sblock) { - spin_lock(&sdev->stat_lock); - sdev->stat.malloc_errors++; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + sctx->stat.malloc_errors++; + spin_unlock(&sctx->stat_lock); return -ENOMEM; } - /* one ref inside this function, plus one for each page later on */ + /* one ref inside this function, plus one for each page added to + * a bio later on */ atomic_set(&sblock->ref_count, 1); - sblock->sdev = sdev; + sblock->sctx = sctx; sblock->no_io_error_seen = 1; for (index = 0; len > 0; index++) { - struct scrub_page *spage = sblock->pagev + index; + struct scrub_page *spage; u64 l = min_t(u64, len, PAGE_SIZE); - BUG_ON(index >= SCRUB_MAX_PAGES_PER_BLOCK); - spage->page = alloc_page(GFP_NOFS); - if (!spage->page) { - spin_lock(&sdev->stat_lock); - sdev->stat.malloc_errors++; - spin_unlock(&sdev->stat_lock); - while (index > 0) { - index--; - __free_page(sblock->pagev[index].page); - } - kfree(sblock); + spage = kzalloc(sizeof(*spage), GFP_NOFS); + if (!spage) { +leave_nomem: + spin_lock(&sctx->stat_lock); + sctx->stat.malloc_errors++; + spin_unlock(&sctx->stat_lock); + scrub_block_put(sblock); return -ENOMEM; } + BUG_ON(index >= SCRUB_MAX_PAGES_PER_BLOCK); + scrub_page_get(spage); + sblock->pagev[index] = spage; spage->sblock = sblock; - spage->dev = sdev->dev; + spage->dev = dev; spage->flags = flags; spage->generation = gen; spage->logical = logical; spage->physical = physical; + spage->physical_for_dev_replace = physical_for_dev_replace; spage->mirror_num = mirror_num; if (csum) { spage->have_csum = 1; - memcpy(spage->csum, csum, sdev->csum_size); + memcpy(spage->csum, csum, sctx->csum_size); } else { spage->have_csum = 0; } sblock->page_count++; + spage->page = alloc_page(GFP_NOFS); + if (!spage->page) + goto leave_nomem; len -= l; logical += l; physical += l; + physical_for_dev_replace += l; } - BUG_ON(sblock->page_count == 0); + WARN_ON(sblock->page_count == 0); for (index = 0; index < sblock->page_count; index++) { - struct scrub_page *spage = sblock->pagev + index; + struct scrub_page *spage = sblock->pagev[index]; int ret; - ret = scrub_add_page_to_bio(sdev, spage); + ret = scrub_add_page_to_rd_bio(sctx, spage); if (ret) { scrub_block_put(sblock); return ret; @@ -1624,7 +2039,7 @@ static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len, } if (force) - scrub_submit(sdev); + scrub_submit(sctx); /* last one frees, either here or in bio completion for last page */ scrub_block_put(sblock); @@ -1634,8 +2049,7 @@ static int scrub_pages(struct scrub_dev *sdev, u64 logical, u64 len, static void scrub_bio_end_io(struct bio *bio, int err) { struct scrub_bio *sbio = bio->bi_private; - struct scrub_dev *sdev = sbio->sdev; - struct btrfs_fs_info *fs_info = sdev->dev->dev_root->fs_info; + struct btrfs_fs_info *fs_info = sbio->dev->dev_root->fs_info; sbio->err = err; sbio->bio = bio; @@ -1646,10 +2060,10 @@ static void scrub_bio_end_io(struct bio *bio, int err) static void scrub_bio_end_io_worker(struct btrfs_work *work) { struct scrub_bio *sbio = container_of(work, struct scrub_bio, work); - struct scrub_dev *sdev = sbio->sdev; + struct scrub_ctx *sctx = sbio->sctx; int i; - BUG_ON(sbio->page_count > SCRUB_PAGES_PER_BIO); + BUG_ON(sbio->page_count > SCRUB_PAGES_PER_RD_BIO); if (sbio->err) { for (i = 0; i < sbio->page_count; i++) { struct scrub_page *spage = sbio->pagev[i]; @@ -1671,23 +2085,37 @@ static void scrub_bio_end_io_worker(struct btrfs_work *work) bio_put(sbio->bio); sbio->bio = NULL; - spin_lock(&sdev->list_lock); - sbio->next_free = sdev->first_free; - sdev->first_free = sbio->index; - spin_unlock(&sdev->list_lock); - atomic_dec(&sdev->in_flight); - wake_up(&sdev->list_wait); + spin_lock(&sctx->list_lock); + sbio->next_free = sctx->first_free; + sctx->first_free = sbio->index; + spin_unlock(&sctx->list_lock); + + if (sctx->is_dev_replace && + atomic_read(&sctx->wr_ctx.flush_all_writes)) { + mutex_lock(&sctx->wr_ctx.wr_lock); + scrub_wr_submit(sctx); + mutex_unlock(&sctx->wr_ctx.wr_lock); + } + + scrub_pending_bio_dec(sctx); } static void scrub_block_complete(struct scrub_block *sblock) { - if (!sblock->no_io_error_seen) + if (!sblock->no_io_error_seen) { scrub_handle_errored_block(sblock); - else - scrub_checksum(sblock); + } else { + /* + * if has checksum error, write via repair mechanism in + * dev replace case, otherwise write here in dev replace + * case. + */ + if (!scrub_checksum(sblock) && sblock->sctx->is_dev_replace) + scrub_write_block_to_dev_replace(sblock); + } } -static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len, +static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u64 len, u8 *csum) { struct btrfs_ordered_sum *sum = NULL; @@ -1695,15 +2123,15 @@ static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len, unsigned long i; unsigned long num_sectors; - while (!list_empty(&sdev->csum_list)) { - sum = list_first_entry(&sdev->csum_list, + while (!list_empty(&sctx->csum_list)) { + sum = list_first_entry(&sctx->csum_list, struct btrfs_ordered_sum, list); if (sum->bytenr > logical) return 0; if (sum->bytenr + sum->len > logical) break; - ++sdev->stat.csum_discards; + ++sctx->stat.csum_discards; list_del(&sum->list); kfree(sum); sum = NULL; @@ -1711,10 +2139,10 @@ static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len, if (!sum) return 0; - num_sectors = sum->len / sdev->sectorsize; + num_sectors = sum->len / sctx->sectorsize; for (i = 0; i < num_sectors; ++i) { if (sum->sums[i].bytenr == logical) { - memcpy(csum, &sum->sums[i].sum, sdev->csum_size); + memcpy(csum, &sum->sums[i].sum, sctx->csum_size); ret = 1; break; } @@ -1727,29 +2155,30 @@ static int scrub_find_csum(struct scrub_dev *sdev, u64 logical, u64 len, } /* scrub extent tries to collect up to 64 kB for each bio */ -static int scrub_extent(struct scrub_dev *sdev, u64 logical, u64 len, - u64 physical, u64 flags, u64 gen, int mirror_num) +static int scrub_extent(struct scrub_ctx *sctx, u64 logical, u64 len, + u64 physical, struct btrfs_device *dev, u64 flags, + u64 gen, int mirror_num, u64 physical_for_dev_replace) { int ret; u8 csum[BTRFS_CSUM_SIZE]; u32 blocksize; if (flags & BTRFS_EXTENT_FLAG_DATA) { - blocksize = sdev->sectorsize; - spin_lock(&sdev->stat_lock); - sdev->stat.data_extents_scrubbed++; - sdev->stat.data_bytes_scrubbed += len; - spin_unlock(&sdev->stat_lock); + blocksize = sctx->sectorsize; + spin_lock(&sctx->stat_lock); + sctx->stat.data_extents_scrubbed++; + sctx->stat.data_bytes_scrubbed += len; + spin_unlock(&sctx->stat_lock); } else if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { - BUG_ON(sdev->nodesize != sdev->leafsize); - blocksize = sdev->nodesize; - spin_lock(&sdev->stat_lock); - sdev->stat.tree_extents_scrubbed++; - sdev->stat.tree_bytes_scrubbed += len; - spin_unlock(&sdev->stat_lock); + WARN_ON(sctx->nodesize != sctx->leafsize); + blocksize = sctx->nodesize; + spin_lock(&sctx->stat_lock); + sctx->stat.tree_extents_scrubbed++; + sctx->stat.tree_bytes_scrubbed += len; + spin_unlock(&sctx->stat_lock); } else { - blocksize = sdev->sectorsize; - BUG_ON(1); + blocksize = sctx->sectorsize; + WARN_ON(1); } while (len) { @@ -1758,26 +2187,38 @@ static int scrub_extent(struct scrub_dev *sdev, u64 logical, u64 len, if (flags & BTRFS_EXTENT_FLAG_DATA) { /* push csums to sbio */ - have_csum = scrub_find_csum(sdev, logical, l, csum); + have_csum = scrub_find_csum(sctx, logical, l, csum); if (have_csum == 0) - ++sdev->stat.no_csum; + ++sctx->stat.no_csum; + if (sctx->is_dev_replace && !have_csum) { + ret = copy_nocow_pages(sctx, logical, l, + mirror_num, + physical_for_dev_replace); + goto behind_scrub_pages; + } } - ret = scrub_pages(sdev, logical, l, physical, flags, gen, - mirror_num, have_csum ? csum : NULL, 0); + ret = scrub_pages(sctx, logical, l, physical, dev, flags, gen, + mirror_num, have_csum ? csum : NULL, 0, + physical_for_dev_replace); +behind_scrub_pages: if (ret) return ret; len -= l; logical += l; physical += l; + physical_for_dev_replace += l; } return 0; } -static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, - struct map_lookup *map, int num, u64 base, u64 length) +static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx, + struct map_lookup *map, + struct btrfs_device *scrub_dev, + int num, u64 base, u64 length, + int is_dev_replace) { struct btrfs_path *path; - struct btrfs_fs_info *fs_info = sdev->dev->dev_root->fs_info; + struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info; struct btrfs_root *root = fs_info->extent_root; struct btrfs_root *csum_root = fs_info->csum_root; struct btrfs_extent_item *extent; @@ -1797,9 +2238,13 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, struct reada_control *reada2; struct btrfs_key key_start; struct btrfs_key key_end; - u64 increment = map->stripe_len; u64 offset; + u64 extent_logical; + u64 extent_physical; + u64 extent_len; + struct btrfs_device *extent_dev; + int extent_mirror_num; nstripes = length; offset = 0; @@ -1843,8 +2288,8 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, */ logical = base + offset; - wait_event(sdev->list_wait, - atomic_read(&sdev->in_flight) == 0); + wait_event(sctx->list_wait, + atomic_read(&sctx->bios_in_flight) == 0); atomic_inc(&fs_info->scrubs_paused); wake_up(&fs_info->scrub_pause_wait); @@ -1898,7 +2343,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, * canceled? */ if (atomic_read(&fs_info->scrub_cancel_req) || - atomic_read(&sdev->cancel_req)) { + atomic_read(&sctx->cancel_req)) { ret = -ECANCELED; goto out; } @@ -1907,9 +2352,14 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, */ if (atomic_read(&fs_info->scrub_pause_req)) { /* push queued extents */ - scrub_submit(sdev); - wait_event(sdev->list_wait, - atomic_read(&sdev->in_flight) == 0); + atomic_set(&sctx->wr_ctx.flush_all_writes, 1); + scrub_submit(sctx); + mutex_lock(&sctx->wr_ctx.wr_lock); + scrub_wr_submit(sctx); + mutex_unlock(&sctx->wr_ctx.wr_lock); + wait_event(sctx->list_wait, + atomic_read(&sctx->bios_in_flight) == 0); + atomic_set(&sctx->wr_ctx.flush_all_writes, 0); atomic_inc(&fs_info->scrubs_paused); wake_up(&fs_info->scrub_pause_wait); mutex_lock(&fs_info->scrub_lock); @@ -1926,7 +2376,7 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, ret = btrfs_lookup_csums_range(csum_root, logical, logical + map->stripe_len - 1, - &sdev->csum_list, 1); + &sctx->csum_list, 1); if (ret) goto out; @@ -2004,9 +2454,20 @@ static noinline_for_stack int scrub_stripe(struct scrub_dev *sdev, key.objectid; } - ret = scrub_extent(sdev, key.objectid, key.offset, - key.objectid - logical + physical, - flags, generation, mirror_num); + extent_logical = key.objectid; + extent_physical = key.objectid - logical + physical; + extent_len = key.offset; + extent_dev = scrub_dev; + extent_mirror_num = mirror_num; + if (is_dev_replace) + scrub_remap_extent(fs_info, extent_logical, + extent_len, &extent_physical, + &extent_dev, + &extent_mirror_num); + ret = scrub_extent(sctx, extent_logical, extent_len, + extent_physical, extent_dev, flags, + generation, extent_mirror_num, + key.objectid - logical + physical); if (ret) goto out; @@ -2016,29 +2477,34 @@ next: btrfs_release_path(path); logical += increment; physical += map->stripe_len; - spin_lock(&sdev->stat_lock); - sdev->stat.last_physical = physical; - spin_unlock(&sdev->stat_lock); + spin_lock(&sctx->stat_lock); + sctx->stat.last_physical = physical; + spin_unlock(&sctx->stat_lock); } +out: /* push queued extents */ - scrub_submit(sdev); + scrub_submit(sctx); + mutex_lock(&sctx->wr_ctx.wr_lock); + scrub_wr_submit(sctx); + mutex_unlock(&sctx->wr_ctx.wr_lock); -out: blk_finish_plug(&plug); btrfs_free_path(path); return ret < 0 ? ret : 0; } -static noinline_for_stack int scrub_chunk(struct scrub_dev *sdev, - u64 chunk_tree, u64 chunk_objectid, u64 chunk_offset, u64 length, - u64 dev_offset) +static noinline_for_stack int scrub_chunk(struct scrub_ctx *sctx, + struct btrfs_device *scrub_dev, + u64 chunk_tree, u64 chunk_objectid, + u64 chunk_offset, u64 length, + u64 dev_offset, int is_dev_replace) { struct btrfs_mapping_tree *map_tree = - &sdev->dev->dev_root->fs_info->mapping_tree; + &sctx->dev_root->fs_info->mapping_tree; struct map_lookup *map; struct extent_map *em; int i; - int ret = -EINVAL; + int ret = 0; read_lock(&map_tree->map_tree.lock); em = lookup_extent_mapping(&map_tree->map_tree, chunk_offset, 1); @@ -2055,9 +2521,11 @@ static noinline_for_stack int scrub_chunk(struct scrub_dev *sdev, goto out; for (i = 0; i < map->num_stripes; ++i) { - if (map->stripes[i].dev == sdev->dev && + if (map->stripes[i].dev->bdev == scrub_dev->bdev && map->stripes[i].physical == dev_offset) { - ret = scrub_stripe(sdev, map, i, chunk_offset, length); + ret = scrub_stripe(sctx, map, scrub_dev, i, + chunk_offset, length, + is_dev_replace); if (ret) goto out; } @@ -2069,11 +2537,13 @@ out: } static noinline_for_stack -int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end) +int scrub_enumerate_chunks(struct scrub_ctx *sctx, + struct btrfs_device *scrub_dev, u64 start, u64 end, + int is_dev_replace) { struct btrfs_dev_extent *dev_extent = NULL; struct btrfs_path *path; - struct btrfs_root *root = sdev->dev->dev_root; + struct btrfs_root *root = sctx->dev_root; struct btrfs_fs_info *fs_info = root->fs_info; u64 length; u64 chunk_tree; @@ -2085,6 +2555,7 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end) struct btrfs_key key; struct btrfs_key found_key; struct btrfs_block_group_cache *cache; + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; path = btrfs_alloc_path(); if (!path) @@ -2094,11 +2565,10 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end) path->search_commit_root = 1; path->skip_locking = 1; - key.objectid = sdev->dev->devid; + key.objectid = scrub_dev->devid; key.offset = 0ull; key.type = BTRFS_DEV_EXTENT_KEY; - while (1) { ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); if (ret < 0) @@ -2117,7 +2587,7 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end) btrfs_item_key_to_cpu(l, &found_key, slot); - if (found_key.objectid != sdev->dev->devid) + if (found_key.objectid != scrub_dev->devid) break; if (btrfs_key_type(&found_key) != BTRFS_DEV_EXTENT_KEY) @@ -2151,11 +2621,62 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end) ret = -ENOENT; break; } - ret = scrub_chunk(sdev, chunk_tree, chunk_objectid, - chunk_offset, length, found_key.offset); + dev_replace->cursor_right = found_key.offset + length; + dev_replace->cursor_left = found_key.offset; + dev_replace->item_needs_writeback = 1; + ret = scrub_chunk(sctx, scrub_dev, chunk_tree, chunk_objectid, + chunk_offset, length, found_key.offset, + is_dev_replace); + + /* + * flush, submit all pending read and write bios, afterwards + * wait for them. + * Note that in the dev replace case, a read request causes + * write requests that are submitted in the read completion + * worker. Therefore in the current situation, it is required + * that all write requests are flushed, so that all read and + * write requests are really completed when bios_in_flight + * changes to 0. + */ + atomic_set(&sctx->wr_ctx.flush_all_writes, 1); + scrub_submit(sctx); + mutex_lock(&sctx->wr_ctx.wr_lock); + scrub_wr_submit(sctx); + mutex_unlock(&sctx->wr_ctx.wr_lock); + + wait_event(sctx->list_wait, + atomic_read(&sctx->bios_in_flight) == 0); + atomic_set(&sctx->wr_ctx.flush_all_writes, 0); + atomic_inc(&fs_info->scrubs_paused); + wake_up(&fs_info->scrub_pause_wait); + wait_event(sctx->list_wait, + atomic_read(&sctx->workers_pending) == 0); + + mutex_lock(&fs_info->scrub_lock); + while (atomic_read(&fs_info->scrub_pause_req)) { + mutex_unlock(&fs_info->scrub_lock); + wait_event(fs_info->scrub_pause_wait, + atomic_read(&fs_info->scrub_pause_req) == 0); + mutex_lock(&fs_info->scrub_lock); + } + atomic_dec(&fs_info->scrubs_paused); + mutex_unlock(&fs_info->scrub_lock); + wake_up(&fs_info->scrub_pause_wait); + + dev_replace->cursor_left = dev_replace->cursor_right; + dev_replace->item_needs_writeback = 1; btrfs_put_block_group(cache); if (ret) break; + if (is_dev_replace && + atomic64_read(&dev_replace->num_write_errors) > 0) { + ret = -EIO; + break; + } + if (sctx->stat.malloc_errors > 0) { + ret = -ENOMEM; + break; + } key.offset = found_key.offset + length; btrfs_release_path(path); @@ -2170,14 +2691,14 @@ int scrub_enumerate_chunks(struct scrub_dev *sdev, u64 start, u64 end) return ret < 0 ? ret : 0; } -static noinline_for_stack int scrub_supers(struct scrub_dev *sdev) +static noinline_for_stack int scrub_supers(struct scrub_ctx *sctx, + struct btrfs_device *scrub_dev) { int i; u64 bytenr; u64 gen; int ret; - struct btrfs_device *device = sdev->dev; - struct btrfs_root *root = device->dev_root; + struct btrfs_root *root = sctx->dev_root; if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) return -EIO; @@ -2186,15 +2707,16 @@ static noinline_for_stack int scrub_supers(struct scrub_dev *sdev) for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { bytenr = btrfs_sb_offset(i); - if (bytenr + BTRFS_SUPER_INFO_SIZE > device->total_bytes) + if (bytenr + BTRFS_SUPER_INFO_SIZE > scrub_dev->total_bytes) break; - ret = scrub_pages(sdev, bytenr, BTRFS_SUPER_INFO_SIZE, bytenr, - BTRFS_EXTENT_FLAG_SUPER, gen, i, NULL, 1); + ret = scrub_pages(sctx, bytenr, BTRFS_SUPER_INFO_SIZE, bytenr, + scrub_dev, BTRFS_EXTENT_FLAG_SUPER, gen, i, + NULL, 1, bytenr); if (ret) return ret; } - wait_event(sdev->list_wait, atomic_read(&sdev->in_flight) == 0); + wait_event(sctx->list_wait, atomic_read(&sctx->bios_in_flight) == 0); return 0; } @@ -2202,19 +2724,38 @@ static noinline_for_stack int scrub_supers(struct scrub_dev *sdev) /* * get a reference count on fs_info->scrub_workers. start worker if necessary */ -static noinline_for_stack int scrub_workers_get(struct btrfs_root *root) +static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info, + int is_dev_replace) { - struct btrfs_fs_info *fs_info = root->fs_info; int ret = 0; mutex_lock(&fs_info->scrub_lock); if (fs_info->scrub_workers_refcnt == 0) { - btrfs_init_workers(&fs_info->scrub_workers, "scrub", - fs_info->thread_pool_size, &fs_info->generic_worker); + if (is_dev_replace) + btrfs_init_workers(&fs_info->scrub_workers, "scrub", 1, + &fs_info->generic_worker); + else + btrfs_init_workers(&fs_info->scrub_workers, "scrub", + fs_info->thread_pool_size, + &fs_info->generic_worker); fs_info->scrub_workers.idle_thresh = 4; ret = btrfs_start_workers(&fs_info->scrub_workers); if (ret) goto out; + btrfs_init_workers(&fs_info->scrub_wr_completion_workers, + "scrubwrc", + fs_info->thread_pool_size, + &fs_info->generic_worker); + fs_info->scrub_wr_completion_workers.idle_thresh = 2; + ret = btrfs_start_workers( + &fs_info->scrub_wr_completion_workers); + if (ret) + goto out; + btrfs_init_workers(&fs_info->scrub_nocow_workers, "scrubnc", 1, + &fs_info->generic_worker); + ret = btrfs_start_workers(&fs_info->scrub_nocow_workers); + if (ret) + goto out; } ++fs_info->scrub_workers_refcnt; out: @@ -2223,40 +2764,41 @@ out: return ret; } -static noinline_for_stack void scrub_workers_put(struct btrfs_root *root) +static noinline_for_stack void scrub_workers_put(struct btrfs_fs_info *fs_info) { - struct btrfs_fs_info *fs_info = root->fs_info; - mutex_lock(&fs_info->scrub_lock); - if (--fs_info->scrub_workers_refcnt == 0) + if (--fs_info->scrub_workers_refcnt == 0) { btrfs_stop_workers(&fs_info->scrub_workers); + btrfs_stop_workers(&fs_info->scrub_wr_completion_workers); + btrfs_stop_workers(&fs_info->scrub_nocow_workers); + } WARN_ON(fs_info->scrub_workers_refcnt < 0); mutex_unlock(&fs_info->scrub_lock); } - -int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, - struct btrfs_scrub_progress *progress, int readonly) +int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, + u64 end, struct btrfs_scrub_progress *progress, + int readonly, int is_dev_replace) { - struct scrub_dev *sdev; - struct btrfs_fs_info *fs_info = root->fs_info; + struct scrub_ctx *sctx; int ret; struct btrfs_device *dev; - if (btrfs_fs_closing(root->fs_info)) + if (btrfs_fs_closing(fs_info)) return -EINVAL; /* * check some assumptions */ - if (root->nodesize != root->leafsize) { + if (fs_info->chunk_root->nodesize != fs_info->chunk_root->leafsize) { printk(KERN_ERR "btrfs_scrub: size assumption nodesize == leafsize (%d == %d) fails\n", - root->nodesize, root->leafsize); + fs_info->chunk_root->nodesize, + fs_info->chunk_root->leafsize); return -EINVAL; } - if (root->nodesize > BTRFS_STRIPE_LEN) { + if (fs_info->chunk_root->nodesize > BTRFS_STRIPE_LEN) { /* * in this case scrub is unable to calculate the checksum * the way scrub is implemented. Do not handle this @@ -2264,80 +2806,105 @@ int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end, */ printk(KERN_ERR "btrfs_scrub: size assumption nodesize <= BTRFS_STRIPE_LEN (%d <= %d) fails\n", - root->nodesize, BTRFS_STRIPE_LEN); + fs_info->chunk_root->nodesize, BTRFS_STRIPE_LEN); return -EINVAL; } - if (root->sectorsize != PAGE_SIZE) { + if (fs_info->chunk_root->sectorsize != PAGE_SIZE) { /* not supported for data w/o checksums */ printk(KERN_ERR "btrfs_scrub: size assumption sectorsize != PAGE_SIZE (%d != %lld) fails\n", - root->sectorsize, (unsigned long long)PAGE_SIZE); + fs_info->chunk_root->sectorsize, + (unsigned long long)PAGE_SIZE); return -EINVAL; } - ret = scrub_workers_get(root); + if (fs_info->chunk_root->nodesize > + PAGE_SIZE * SCRUB_MAX_PAGES_PER_BLOCK || + fs_info->chunk_root->sectorsize > + PAGE_SIZE * SCRUB_MAX_PAGES_PER_BLOCK) { + /* + * would exhaust the array bounds of pagev member in + * struct scrub_block + */ + pr_err("btrfs_scrub: size assumption nodesize and sectorsize <= SCRUB_MAX_PAGES_PER_BLOCK (%d <= %d && %d <= %d) fails\n", + fs_info->chunk_root->nodesize, + SCRUB_MAX_PAGES_PER_BLOCK, + fs_info->chunk_root->sectorsize, + SCRUB_MAX_PAGES_PER_BLOCK); + return -EINVAL; + } + + ret = scrub_workers_get(fs_info, is_dev_replace); if (ret) return ret; - mutex_lock(&root->fs_info->fs_devices->device_list_mutex); - dev = btrfs_find_device(root, devid, NULL, NULL); - if (!dev || dev->missing) { - mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); - scrub_workers_put(root); + mutex_lock(&fs_info->fs_devices->device_list_mutex); + dev = btrfs_find_device(fs_info, devid, NULL, NULL); + if (!dev || (dev->missing && !is_dev_replace)) { + mutex_unlock(&fs_info->fs_devices->device_list_mutex); + scrub_workers_put(fs_info); return -ENODEV; } mutex_lock(&fs_info->scrub_lock); - if (!dev->in_fs_metadata) { + if (!dev->in_fs_metadata || dev->is_tgtdev_for_dev_replace) { mutex_unlock(&fs_info->scrub_lock); - mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); - scrub_workers_put(root); - return -ENODEV; + mutex_unlock(&fs_info->fs_devices->device_list_mutex); + scrub_workers_put(fs_info); + return -EIO; } - if (dev->scrub_device) { + btrfs_dev_replace_lock(&fs_info->dev_replace); + if (dev->scrub_device || + (!is_dev_replace && + btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))) { + btrfs_dev_replace_unlock(&fs_info->dev_replace); mutex_unlock(&fs_info->scrub_lock); - mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); - scrub_workers_put(root); + mutex_unlock(&fs_info->fs_devices->device_list_mutex); + scrub_workers_put(fs_info); return -EINPROGRESS; } - sdev = scrub_setup_dev(dev); - if (IS_ERR(sdev)) { + btrfs_dev_replace_unlock(&fs_info->dev_replace); + sctx = scrub_setup_ctx(dev, is_dev_replace); + if (IS_ERR(sctx)) { mutex_unlock(&fs_info->scrub_lock); - mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); - scrub_workers_put(root); - return PTR_ERR(sdev); + mutex_unlock(&fs_info->fs_devices->device_list_mutex); + scrub_workers_put(fs_info); + return PTR_ERR(sctx); } - sdev->readonly = readonly; - dev->scrub_device = sdev; + sctx->readonly = readonly; + dev->scrub_device = sctx; atomic_inc(&fs_info->scrubs_running); mutex_unlock(&fs_info->scrub_lock); - mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); + mutex_unlock(&fs_info->fs_devices->device_list_mutex); - down_read(&fs_info->scrub_super_lock); - ret = scrub_supers(sdev); - up_read(&fs_info->scrub_super_lock); + if (!is_dev_replace) { + down_read(&fs_info->scrub_super_lock); + ret = scrub_supers(sctx, dev); + up_read(&fs_info->scrub_super_lock); + } if (!ret) - ret = scrub_enumerate_chunks(sdev, start, end); + ret = scrub_enumerate_chunks(sctx, dev, start, end, + is_dev_replace); - wait_event(sdev->list_wait, atomic_read(&sdev->in_flight) == 0); + wait_event(sctx->list_wait, atomic_read(&sctx->bios_in_flight) == 0); atomic_dec(&fs_info->scrubs_running); wake_up(&fs_info->scrub_pause_wait); - wait_event(sdev->list_wait, atomic_read(&sdev->fixup_cnt) == 0); + wait_event(sctx->list_wait, atomic_read(&sctx->workers_pending) == 0); if (progress) - memcpy(progress, &sdev->stat, sizeof(*progress)); + memcpy(progress, &sctx->stat, sizeof(*progress)); mutex_lock(&fs_info->scrub_lock); dev->scrub_device = NULL; mutex_unlock(&fs_info->scrub_lock); - scrub_free_dev(sdev); - scrub_workers_put(root); + scrub_free_ctx(sctx); + scrub_workers_put(fs_info); return ret; } @@ -2377,9 +2944,8 @@ void btrfs_scrub_continue_super(struct btrfs_root *root) up_write(&root->fs_info->scrub_super_lock); } -int __btrfs_scrub_cancel(struct btrfs_fs_info *fs_info) +int btrfs_scrub_cancel(struct btrfs_fs_info *fs_info) { - mutex_lock(&fs_info->scrub_lock); if (!atomic_read(&fs_info->scrubs_running)) { mutex_unlock(&fs_info->scrub_lock); @@ -2399,23 +2965,18 @@ int __btrfs_scrub_cancel(struct btrfs_fs_info *fs_info) return 0; } -int btrfs_scrub_cancel(struct btrfs_root *root) +int btrfs_scrub_cancel_dev(struct btrfs_fs_info *fs_info, + struct btrfs_device *dev) { - return __btrfs_scrub_cancel(root->fs_info); -} - -int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev) -{ - struct btrfs_fs_info *fs_info = root->fs_info; - struct scrub_dev *sdev; + struct scrub_ctx *sctx; mutex_lock(&fs_info->scrub_lock); - sdev = dev->scrub_device; - if (!sdev) { + sctx = dev->scrub_device; + if (!sctx) { mutex_unlock(&fs_info->scrub_lock); return -ENOTCONN; } - atomic_inc(&sdev->cancel_req); + atomic_inc(&sctx->cancel_req); while (dev->scrub_device) { mutex_unlock(&fs_info->scrub_lock); wait_event(fs_info->scrub_pause_wait, @@ -2438,12 +2999,12 @@ int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid) * does not go away in cancel_dev. FIXME: find a better solution */ mutex_lock(&fs_info->fs_devices->device_list_mutex); - dev = btrfs_find_device(root, devid, NULL, NULL); + dev = btrfs_find_device(fs_info, devid, NULL, NULL); if (!dev) { mutex_unlock(&fs_info->fs_devices->device_list_mutex); return -ENODEV; } - ret = btrfs_scrub_cancel_dev(root, dev); + ret = btrfs_scrub_cancel_dev(fs_info, dev); mutex_unlock(&fs_info->fs_devices->device_list_mutex); return ret; @@ -2453,15 +3014,284 @@ int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, struct btrfs_scrub_progress *progress) { struct btrfs_device *dev; - struct scrub_dev *sdev = NULL; + struct scrub_ctx *sctx = NULL; mutex_lock(&root->fs_info->fs_devices->device_list_mutex); - dev = btrfs_find_device(root, devid, NULL, NULL); + dev = btrfs_find_device(root->fs_info, devid, NULL, NULL); if (dev) - sdev = dev->scrub_device; - if (sdev) - memcpy(progress, &sdev->stat, sizeof(*progress)); + sctx = dev->scrub_device; + if (sctx) + memcpy(progress, &sctx->stat, sizeof(*progress)); mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); - return dev ? (sdev ? 0 : -ENOTCONN) : -ENODEV; + return dev ? (sctx ? 0 : -ENOTCONN) : -ENODEV; +} + +static void scrub_remap_extent(struct btrfs_fs_info *fs_info, + u64 extent_logical, u64 extent_len, + u64 *extent_physical, + struct btrfs_device **extent_dev, + int *extent_mirror_num) +{ + u64 mapped_length; + struct btrfs_bio *bbio = NULL; + int ret; + + mapped_length = extent_len; + ret = btrfs_map_block(fs_info, READ, extent_logical, + &mapped_length, &bbio, 0); + if (ret || !bbio || mapped_length < extent_len || + !bbio->stripes[0].dev->bdev) { + kfree(bbio); + return; + } + + *extent_physical = bbio->stripes[0].physical; + *extent_mirror_num = bbio->mirror_num; + *extent_dev = bbio->stripes[0].dev; + kfree(bbio); +} + +static int scrub_setup_wr_ctx(struct scrub_ctx *sctx, + struct scrub_wr_ctx *wr_ctx, + struct btrfs_fs_info *fs_info, + struct btrfs_device *dev, + int is_dev_replace) +{ + WARN_ON(wr_ctx->wr_curr_bio != NULL); + + mutex_init(&wr_ctx->wr_lock); + wr_ctx->wr_curr_bio = NULL; + if (!is_dev_replace) + return 0; + + WARN_ON(!dev->bdev); + wr_ctx->pages_per_wr_bio = min_t(int, SCRUB_PAGES_PER_WR_BIO, + bio_get_nr_vecs(dev->bdev)); + wr_ctx->tgtdev = dev; + atomic_set(&wr_ctx->flush_all_writes, 0); + return 0; +} + +static void scrub_free_wr_ctx(struct scrub_wr_ctx *wr_ctx) +{ + mutex_lock(&wr_ctx->wr_lock); + kfree(wr_ctx->wr_curr_bio); + wr_ctx->wr_curr_bio = NULL; + mutex_unlock(&wr_ctx->wr_lock); +} + +static int copy_nocow_pages(struct scrub_ctx *sctx, u64 logical, u64 len, + int mirror_num, u64 physical_for_dev_replace) +{ + struct scrub_copy_nocow_ctx *nocow_ctx; + struct btrfs_fs_info *fs_info = sctx->dev_root->fs_info; + + nocow_ctx = kzalloc(sizeof(*nocow_ctx), GFP_NOFS); + if (!nocow_ctx) { + spin_lock(&sctx->stat_lock); + sctx->stat.malloc_errors++; + spin_unlock(&sctx->stat_lock); + return -ENOMEM; + } + + scrub_pending_trans_workers_inc(sctx); + + nocow_ctx->sctx = sctx; + nocow_ctx->logical = logical; + nocow_ctx->len = len; + nocow_ctx->mirror_num = mirror_num; + nocow_ctx->physical_for_dev_replace = physical_for_dev_replace; + nocow_ctx->work.func = copy_nocow_pages_worker; + btrfs_queue_worker(&fs_info->scrub_nocow_workers, + &nocow_ctx->work); + + return 0; +} + +static void copy_nocow_pages_worker(struct btrfs_work *work) +{ + struct scrub_copy_nocow_ctx *nocow_ctx = + container_of(work, struct scrub_copy_nocow_ctx, work); + struct scrub_ctx *sctx = nocow_ctx->sctx; + u64 logical = nocow_ctx->logical; + u64 len = nocow_ctx->len; + int mirror_num = nocow_ctx->mirror_num; + u64 physical_for_dev_replace = nocow_ctx->physical_for_dev_replace; + int ret; + struct btrfs_trans_handle *trans = NULL; + struct btrfs_fs_info *fs_info; + struct btrfs_path *path; + struct btrfs_root *root; + int not_written = 0; + + fs_info = sctx->dev_root->fs_info; + root = fs_info->extent_root; + + path = btrfs_alloc_path(); + if (!path) { + spin_lock(&sctx->stat_lock); + sctx->stat.malloc_errors++; + spin_unlock(&sctx->stat_lock); + not_written = 1; + goto out; + } + + trans = btrfs_join_transaction(root); + if (IS_ERR(trans)) { + not_written = 1; + goto out; + } + + ret = iterate_inodes_from_logical(logical, fs_info, path, + copy_nocow_pages_for_inode, + nocow_ctx); + if (ret != 0 && ret != -ENOENT) { + pr_warn("iterate_inodes_from_logical() failed: log %llu, phys %llu, len %llu, mir %llu, ret %d\n", + (unsigned long long)logical, + (unsigned long long)physical_for_dev_replace, + (unsigned long long)len, + (unsigned long long)mirror_num, ret); + not_written = 1; + goto out; + } + +out: + if (trans && !IS_ERR(trans)) + btrfs_end_transaction(trans, root); + if (not_written) + btrfs_dev_replace_stats_inc(&fs_info->dev_replace. + num_uncorrectable_read_errors); + + btrfs_free_path(path); + kfree(nocow_ctx); + + scrub_pending_trans_workers_dec(sctx); +} + +static int copy_nocow_pages_for_inode(u64 inum, u64 offset, u64 root, void *ctx) +{ + unsigned long index; + struct scrub_copy_nocow_ctx *nocow_ctx = ctx; + int ret = 0; + struct btrfs_key key; + struct inode *inode = NULL; + struct btrfs_root *local_root; + u64 physical_for_dev_replace; + u64 len; + struct btrfs_fs_info *fs_info = nocow_ctx->sctx->dev_root->fs_info; + + key.objectid = root; + key.type = BTRFS_ROOT_ITEM_KEY; + key.offset = (u64)-1; + local_root = btrfs_read_fs_root_no_name(fs_info, &key); + if (IS_ERR(local_root)) + return PTR_ERR(local_root); + + key.type = BTRFS_INODE_ITEM_KEY; + key.objectid = inum; + key.offset = 0; + inode = btrfs_iget(fs_info->sb, &key, local_root, NULL); + if (IS_ERR(inode)) + return PTR_ERR(inode); + + physical_for_dev_replace = nocow_ctx->physical_for_dev_replace; + len = nocow_ctx->len; + while (len >= PAGE_CACHE_SIZE) { + struct page *page = NULL; + int ret_sub; + + index = offset >> PAGE_CACHE_SHIFT; + + page = find_or_create_page(inode->i_mapping, index, GFP_NOFS); + if (!page) { + pr_err("find_or_create_page() failed\n"); + ret = -ENOMEM; + goto next_page; + } + + if (PageUptodate(page)) { + if (PageDirty(page)) + goto next_page; + } else { + ClearPageError(page); + ret_sub = extent_read_full_page(&BTRFS_I(inode)-> + io_tree, + page, btrfs_get_extent, + nocow_ctx->mirror_num); + if (ret_sub) { + ret = ret_sub; + goto next_page; + } + wait_on_page_locked(page); + if (!PageUptodate(page)) { + ret = -EIO; + goto next_page; + } + } + ret_sub = write_page_nocow(nocow_ctx->sctx, + physical_for_dev_replace, page); + if (ret_sub) { + ret = ret_sub; + goto next_page; + } + +next_page: + if (page) { + unlock_page(page); + put_page(page); + } + offset += PAGE_CACHE_SIZE; + physical_for_dev_replace += PAGE_CACHE_SIZE; + len -= PAGE_CACHE_SIZE; + } + + if (inode) + iput(inode); + return ret; +} + +static int write_page_nocow(struct scrub_ctx *sctx, + u64 physical_for_dev_replace, struct page *page) +{ + struct bio *bio; + struct btrfs_device *dev; + int ret; + DECLARE_COMPLETION_ONSTACK(compl); + + dev = sctx->wr_ctx.tgtdev; + if (!dev) + return -EIO; + if (!dev->bdev) { + printk_ratelimited(KERN_WARNING + "btrfs: scrub write_page_nocow(bdev == NULL) is unexpected!\n"); + return -EIO; + } + bio = bio_alloc(GFP_NOFS, 1); + if (!bio) { + spin_lock(&sctx->stat_lock); + sctx->stat.malloc_errors++; + spin_unlock(&sctx->stat_lock); + return -ENOMEM; + } + bio->bi_private = &compl; + bio->bi_end_io = scrub_complete_bio_end_io; + bio->bi_size = 0; + bio->bi_sector = physical_for_dev_replace >> 9; + bio->bi_bdev = dev->bdev; + ret = bio_add_page(bio, page, PAGE_CACHE_SIZE, 0); + if (ret != PAGE_CACHE_SIZE) { +leave_with_eio: + bio_put(bio); + btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_WRITE_ERRS); + return -EIO; + } + btrfsic_submit_bio(WRITE_SYNC, bio); + wait_for_completion(&compl); + + if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) + goto leave_with_eio; + + bio_put(bio); + return 0; } diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index e78b297b0b0..321b7fb4e44 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -1814,8 +1814,10 @@ static int name_cache_insert(struct send_ctx *sctx, (unsigned long)nce->ino); if (!nce_head) { nce_head = kmalloc(sizeof(*nce_head), GFP_NOFS); - if (!nce_head) + if (!nce_head) { + kfree(nce); return -ENOMEM; + } INIT_LIST_HEAD(nce_head); ret = radix_tree_insert(&sctx->name_cache, nce->ino, nce_head); @@ -4397,9 +4399,9 @@ static int full_send_tree(struct send_ctx *sctx) if (!path) return -ENOMEM; - spin_lock(&send_root->root_times_lock); + spin_lock(&send_root->root_item_lock); start_ctransid = btrfs_root_ctransid(&send_root->root_item); - spin_unlock(&send_root->root_times_lock); + spin_unlock(&send_root->root_item_lock); key.objectid = BTRFS_FIRST_FREE_OBJECTID; key.type = BTRFS_INODE_ITEM_KEY; @@ -4422,9 +4424,9 @@ join_trans: * Make sure the tree has not changed after re-joining. We detect this * by comparing start_ctransid and ctransid. They should always match. */ - spin_lock(&send_root->root_times_lock); + spin_lock(&send_root->root_item_lock); ctransid = btrfs_root_ctransid(&send_root->root_item); - spin_unlock(&send_root->root_times_lock); + spin_unlock(&send_root->root_item_lock); if (ctransid != start_ctransid) { WARN(1, KERN_WARNING "btrfs: the root that you're trying to " diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 915ac14c206..d8982e9601d 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -55,6 +55,7 @@ #include "export.h" #include "compression.h" #include "rcu-string.h" +#include "dev-replace.h" #define CREATE_TRACE_POINTS #include <trace/events/btrfs.h> @@ -116,7 +117,16 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info) if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { sb->s_flags |= MS_RDONLY; printk(KERN_INFO "btrfs is forced readonly\n"); - __btrfs_scrub_cancel(fs_info); + /* + * Note that a running device replace operation is not + * canceled here although there is no way to update + * the progress. It would add the risk of a deadlock, + * therefore the canceling is ommited. The only penalty + * is that some I/O remains active until the procedure + * completes. The next time when the filesystem is + * mounted writeable again, the device replace + * operation continues. + */ // WARN_ON(1); } } @@ -257,7 +267,7 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, function, line, errstr); return; } - trans->transaction->aborted = errno; + ACCESS_ONCE(trans->transaction->aborted) = errno; __btrfs_std_error(root->fs_info, function, line, errno, NULL); } /* @@ -1186,7 +1196,8 @@ static void btrfs_resize_thread_pool(struct btrfs_fs_info *fs_info, btrfs_set_max_workers(&fs_info->endio_freespace_worker, new_pool_size); btrfs_set_max_workers(&fs_info->delayed_workers, new_pool_size); btrfs_set_max_workers(&fs_info->readahead_workers, new_pool_size); - btrfs_set_max_workers(&fs_info->scrub_workers, new_pool_size); + btrfs_set_max_workers(&fs_info->scrub_wr_completion_workers, + new_pool_size); } static int btrfs_remount(struct super_block *sb, int *flags, char *data) @@ -1215,8 +1226,15 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) return 0; if (*flags & MS_RDONLY) { + /* + * this also happens on 'umount -rf' or on shutdown, when + * the filesystem is busy. + */ sb->s_flags |= MS_RDONLY; + btrfs_dev_replace_suspend_for_unmount(fs_info); + btrfs_scrub_cancel(fs_info); + ret = btrfs_commit_super(root); if (ret) goto restore; @@ -1226,6 +1244,15 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) goto restore; } + if (fs_info->fs_devices->missing_devices > + fs_info->num_tolerated_disk_barrier_failures && + !(*flags & MS_RDONLY)) { + printk(KERN_WARNING + "Btrfs: too many missing devices, writeable remount is not allowed\n"); + ret = -EACCES; + goto restore; + } + if (btrfs_super_log_root(fs_info->super_copy) != 0) { ret = -EINVAL; goto restore; @@ -1244,6 +1271,11 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) if (ret) goto restore; + ret = btrfs_resume_dev_replace_async(fs_info); + if (ret) { + pr_warn("btrfs: failed to resume dev_replace\n"); + goto restore; + } sb->s_flags &= ~MS_RDONLY; } @@ -1336,7 +1368,8 @@ static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes) min_stripe_size = BTRFS_STRIPE_LEN; list_for_each_entry(device, &fs_devices->devices, dev_list) { - if (!device->in_fs_metadata || !device->bdev) + if (!device->in_fs_metadata || !device->bdev || + device->is_tgtdev_for_dev_replace) continue; avail_space = device->total_bytes - device->bytes_used; @@ -1647,10 +1680,14 @@ static int __init init_btrfs_fs(void) if (err) goto free_ordered_data; - err = btrfs_interface_init(); + err = btrfs_auto_defrag_init(); if (err) goto free_delayed_inode; + err = btrfs_interface_init(); + if (err) + goto free_auto_defrag; + err = register_filesystem(&btrfs_fs_type); if (err) goto unregister_ioctl; @@ -1662,6 +1699,8 @@ static int __init init_btrfs_fs(void) unregister_ioctl: btrfs_interface_exit(); +free_auto_defrag: + btrfs_auto_defrag_exit(); free_delayed_inode: btrfs_delayed_inode_exit(); free_ordered_data: @@ -1681,6 +1720,7 @@ free_compress: static void __exit exit_btrfs_fs(void) { btrfs_destroy_cachep(); + btrfs_auto_defrag_exit(); btrfs_delayed_inode_exit(); ordered_data_exit(); extent_map_exit(); diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 68704e74f0d..fbe40820462 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -30,6 +30,7 @@ #include "tree-log.h" #include "inode-map.h" #include "volumes.h" +#include "dev-replace.h" #define BTRFS_ROOT_TRANS_TAG 0 @@ -144,16 +145,12 @@ loop: * the log must never go across transaction boundaries. */ smp_mb(); - if (!list_empty(&fs_info->tree_mod_seq_list)) { - printk(KERN_ERR "btrfs: tree_mod_seq_list not empty when " + if (!list_empty(&fs_info->tree_mod_seq_list)) + WARN(1, KERN_ERR "btrfs: tree_mod_seq_list not empty when " "creating a fresh transaction\n"); - WARN_ON(1); - } - if (!RB_EMPTY_ROOT(&fs_info->tree_mod_log)) { - printk(KERN_ERR "btrfs: tree_mod_log rb tree not empty when " + if (!RB_EMPTY_ROOT(&fs_info->tree_mod_log)) + WARN(1, KERN_ERR "btrfs: tree_mod_log rb tree not empty when " "creating a fresh transaction\n"); - WARN_ON(1); - } atomic_set(&fs_info->tree_mod_seq, 0); spin_lock_init(&cur_trans->commit_lock); @@ -294,9 +291,9 @@ static int may_wait_transaction(struct btrfs_root *root, int type) return 0; } -static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, - u64 num_items, int type, - int noflush) +static struct btrfs_trans_handle * +start_transaction(struct btrfs_root *root, u64 num_items, int type, + enum btrfs_reserve_flush_enum flush) { struct btrfs_trans_handle *h; struct btrfs_transaction *cur_trans; @@ -311,6 +308,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, WARN_ON(type != TRANS_JOIN && type != TRANS_JOIN_NOLOCK); h = current->journal_info; h->use_count++; + WARN_ON(h->use_count > 2); h->orig_rsv = h->block_rsv; h->block_rsv = NULL; goto got_it; @@ -330,14 +328,9 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, } num_bytes = btrfs_calc_trans_metadata_size(root, num_items); - if (noflush) - ret = btrfs_block_rsv_add_noflush(root, - &root->fs_info->trans_block_rsv, - num_bytes); - else - ret = btrfs_block_rsv_add(root, - &root->fs_info->trans_block_rsv, - num_bytes); + ret = btrfs_block_rsv_add(root, + &root->fs_info->trans_block_rsv, + num_bytes, flush); if (ret) return ERR_PTR(ret); } @@ -421,13 +414,15 @@ got_it: struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, int num_items) { - return start_transaction(root, num_items, TRANS_START, 0); + return start_transaction(root, num_items, TRANS_START, + BTRFS_RESERVE_FLUSH_ALL); } -struct btrfs_trans_handle *btrfs_start_transaction_noflush( +struct btrfs_trans_handle *btrfs_start_transaction_lflush( struct btrfs_root *root, int num_items) { - return start_transaction(root, num_items, TRANS_START, 1); + return start_transaction(root, num_items, TRANS_START, + BTRFS_RESERVE_FLUSH_LIMIT); } struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root) @@ -460,28 +455,31 @@ static noinline void wait_for_commit(struct btrfs_root *root, int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid) { struct btrfs_transaction *cur_trans = NULL, *t; - int ret; + int ret = 0; - ret = 0; if (transid) { if (transid <= root->fs_info->last_trans_committed) goto out; + ret = -EINVAL; /* find specified transaction */ spin_lock(&root->fs_info->trans_lock); list_for_each_entry(t, &root->fs_info->trans_list, list) { if (t->transid == transid) { cur_trans = t; atomic_inc(&cur_trans->use_count); + ret = 0; break; } - if (t->transid > transid) + if (t->transid > transid) { + ret = 0; break; + } } spin_unlock(&root->fs_info->trans_lock); - ret = -EINVAL; + /* The specified transaction doesn't exist */ if (!cur_trans) - goto out; /* bad transid */ + goto out; } else { /* find newest transaction that is committing | committed */ spin_lock(&root->fs_info->trans_lock); @@ -501,9 +499,7 @@ int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid) } wait_for_commit(root, cur_trans); - put_transaction(cur_trans); - ret = 0; out: return ret; } @@ -850,7 +846,9 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans, return ret; ret = btrfs_run_dev_stats(trans, root->fs_info); - BUG_ON(ret); + WARN_ON(ret); + ret = btrfs_run_dev_replace(trans, root->fs_info); + WARN_ON(ret); ret = btrfs_run_qgroups(trans, root->fs_info); BUG_ON(ret); @@ -873,6 +871,8 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans, switch_commit_root(fs_info->extent_root); up_write(&fs_info->extent_commit_sem); + btrfs_after_dev_replace_commit(fs_info); + return 0; } @@ -957,7 +957,6 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly) struct btrfs_fs_info *info = root->fs_info; struct btrfs_trans_handle *trans; int ret; - unsigned long nr; if (xchg(&root->defrag_running, 1)) return 0; @@ -969,9 +968,8 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly) ret = btrfs_defrag_leaves(trans, root, cacheonly); - nr = trans->blocks_used; btrfs_end_transaction(trans, root); - btrfs_btree_balance_dirty(info->tree_root, nr); + btrfs_btree_balance_dirty(info->tree_root); cond_resched(); if (btrfs_fs_closing(root->fs_info) || ret != -EAGAIN) @@ -1031,8 +1029,9 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, btrfs_reloc_pre_snapshot(trans, pending, &to_reserve); if (to_reserve > 0) { - ret = btrfs_block_rsv_add_noflush(root, &pending->block_rsv, - to_reserve); + ret = btrfs_block_rsv_add(root, &pending->block_rsv, + to_reserve, + BTRFS_RESERVE_NO_FLUSH); if (ret) { pending->error = ret; goto no_free_objectid; @@ -1190,7 +1189,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, parent_inode, &key, BTRFS_FT_DIR, index); /* We have check then name at the beginning, so it is impossible. */ - BUG_ON(ret == -EEXIST); + BUG_ON(ret == -EEXIST || ret == -EOVERFLOW); if (ret) { btrfs_abort_transaction(trans, root, ret); goto fail; @@ -1308,9 +1307,10 @@ static void do_async_commit(struct work_struct *work) * We've got freeze protection passed with the transaction. * Tell lockdep about it. */ - rwsem_acquire_read( - &ac->root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], - 0, 1, _THIS_IP_); + if (ac->newtrans->type < TRANS_JOIN_NOLOCK) + rwsem_acquire_read( + &ac->root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], + 0, 1, _THIS_IP_); current->journal_info = ac->newtrans; @@ -1348,8 +1348,10 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, * Tell lockdep we've released the freeze rwsem, since the * async commit thread will be the one to unlock it. */ - rwsem_release(&root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], - 1, _THIS_IP_); + if (trans->type < TRANS_JOIN_NOLOCK) + rwsem_release( + &root->fs_info->sb->s_writers.lock_map[SB_FREEZE_FS-1], + 1, _THIS_IP_); schedule_delayed_work(&ac->work, 0); @@ -1399,6 +1401,48 @@ static void cleanup_transaction(struct btrfs_trans_handle *trans, kmem_cache_free(btrfs_trans_handle_cachep, trans); } +static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans, + struct btrfs_root *root) +{ + int flush_on_commit = btrfs_test_opt(root, FLUSHONCOMMIT); + int snap_pending = 0; + int ret; + + if (!flush_on_commit) { + spin_lock(&root->fs_info->trans_lock); + if (!list_empty(&trans->transaction->pending_snapshots)) + snap_pending = 1; + spin_unlock(&root->fs_info->trans_lock); + } + + if (flush_on_commit || snap_pending) { + btrfs_start_delalloc_inodes(root, 1); + btrfs_wait_ordered_extents(root, 1); + } + + ret = btrfs_run_delayed_items(trans, root); + if (ret) + return ret; + + /* + * running the delayed items may have added new refs. account + * them now so that they hinder processing of more delayed refs + * as little as possible. + */ + btrfs_delayed_refs_qgroup_accounting(trans, root->fs_info); + + /* + * rename don't use btrfs_join_transaction, so, once we + * set the transaction to blocked above, we aren't going + * to get any new ordered operations. We can safely run + * it here and no for sure that nothing new will be added + * to the list + */ + btrfs_run_ordered_operations(root, 1); + + return 0; +} + /* * btrfs_transaction state sequence: * in_commit = 0, blocked = 0 (initial) @@ -1413,15 +1457,21 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_transaction *cur_trans = trans->transaction; struct btrfs_transaction *prev_trans = NULL; DEFINE_WAIT(wait); - int ret = -EIO; + int ret; int should_grow = 0; unsigned long now = get_seconds(); - int flush_on_commit = btrfs_test_opt(root, FLUSHONCOMMIT); - btrfs_run_ordered_operations(root, 0); + ret = btrfs_run_ordered_operations(root, 0); + if (ret) { + btrfs_abort_transaction(trans, root, ret); + goto cleanup_transaction; + } - if (cur_trans->aborted) + /* Stop the commit early if ->aborted is set */ + if (unlikely(ACCESS_ONCE(cur_trans->aborted))) { + ret = cur_trans->aborted; goto cleanup_transaction; + } /* make a pass through all the delayed refs we have so far * any runnings procs may add more while we are here @@ -1489,39 +1539,14 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, should_grow = 1; do { - int snap_pending = 0; - joined = cur_trans->num_joined; - if (!list_empty(&trans->transaction->pending_snapshots)) - snap_pending = 1; WARN_ON(cur_trans != trans->transaction); - if (flush_on_commit || snap_pending) { - btrfs_start_delalloc_inodes(root, 1); - btrfs_wait_ordered_extents(root, 1); - } - - ret = btrfs_run_delayed_items(trans, root); + ret = btrfs_flush_all_pending_stuffs(trans, root); if (ret) goto cleanup_transaction; - /* - * running the delayed items may have added new refs. account - * them now so that they hinder processing of more delayed refs - * as little as possible. - */ - btrfs_delayed_refs_qgroup_accounting(trans, root->fs_info); - - /* - * rename don't use btrfs_join_transaction, so, once we - * set the transaction to blocked above, we aren't going - * to get any new ordered operations. We can safely run - * it here and no for sure that nothing new will be added - * to the list - */ - btrfs_run_ordered_operations(root, 1); - prepare_to_wait(&cur_trans->writer_wait, &wait, TASK_UNINTERRUPTIBLE); @@ -1534,6 +1559,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, } while (atomic_read(&cur_trans->num_writers) > 1 || (should_grow && cur_trans->num_joined != joined)); + ret = btrfs_flush_all_pending_stuffs(trans, root); + if (ret) + goto cleanup_transaction; + /* * Ok now we need to make sure to block out any other joins while we * commit the transaction. We could have started a join before setting @@ -1545,6 +1574,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, wait_event(cur_trans->writer_wait, atomic_read(&cur_trans->num_writers) == 1); + /* ->aborted might be set after the previous check, so check it */ + if (unlikely(ACCESS_ONCE(cur_trans->aborted))) { + ret = cur_trans->aborted; + goto cleanup_transaction; + } /* * the reloc mutex makes sure that we stop * the balancing code from coming in and moving @@ -1628,6 +1662,17 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, goto cleanup_transaction; } + /* + * The tasks which save the space cache and inode cache may also + * update ->aborted, check it. + */ + if (unlikely(ACCESS_ONCE(cur_trans->aborted))) { + ret = cur_trans->aborted; + mutex_unlock(&root->fs_info->tree_log_mutex); + mutex_unlock(&root->fs_info->reloc_mutex); + goto cleanup_transaction; + } + btrfs_prepare_extent_commit(trans, root); cur_trans = root->fs_info->running_transaction; diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index 80961947a6b..0e8aa1e6c28 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -105,7 +105,7 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, int num_items); -struct btrfs_trans_handle *btrfs_start_transaction_noflush( +struct btrfs_trans_handle *btrfs_start_transaction_lflush( struct btrfs_root *root, int num_items); struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 81e407d9677..9027bb1e746 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -2952,33 +2952,9 @@ static void fill_inode_item(struct btrfs_trans_handle *trans, struct btrfs_inode_item *item, struct inode *inode, int log_inode_only) { - btrfs_set_inode_uid(leaf, item, i_uid_read(inode)); - btrfs_set_inode_gid(leaf, item, i_gid_read(inode)); - btrfs_set_inode_mode(leaf, item, inode->i_mode); - btrfs_set_inode_nlink(leaf, item, inode->i_nlink); - - btrfs_set_timespec_sec(leaf, btrfs_inode_atime(item), - inode->i_atime.tv_sec); - btrfs_set_timespec_nsec(leaf, btrfs_inode_atime(item), - inode->i_atime.tv_nsec); - - btrfs_set_timespec_sec(leaf, btrfs_inode_mtime(item), - inode->i_mtime.tv_sec); - btrfs_set_timespec_nsec(leaf, btrfs_inode_mtime(item), - inode->i_mtime.tv_nsec); - - btrfs_set_timespec_sec(leaf, btrfs_inode_ctime(item), - inode->i_ctime.tv_sec); - btrfs_set_timespec_nsec(leaf, btrfs_inode_ctime(item), - inode->i_ctime.tv_nsec); - - btrfs_set_inode_nbytes(leaf, item, inode_get_bytes(inode)); - - btrfs_set_inode_sequence(leaf, item, inode->i_version); - btrfs_set_inode_transid(leaf, item, trans->transid); - btrfs_set_inode_rdev(leaf, item, inode->i_rdev); - btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags); - btrfs_set_inode_block_group(leaf, item, 0); + struct btrfs_map_token token; + + btrfs_init_map_token(&token); if (log_inode_only) { /* set the generation to zero so the recover code @@ -2986,14 +2962,63 @@ static void fill_inode_item(struct btrfs_trans_handle *trans, * just to say 'this inode exists' and a logging * to say 'update this inode with these values' */ - btrfs_set_inode_generation(leaf, item, 0); - btrfs_set_inode_size(leaf, item, 0); + btrfs_set_token_inode_generation(leaf, item, 0, &token); + btrfs_set_token_inode_size(leaf, item, 0, &token); } else { - btrfs_set_inode_generation(leaf, item, - BTRFS_I(inode)->generation); - btrfs_set_inode_size(leaf, item, inode->i_size); - } + btrfs_set_token_inode_generation(leaf, item, + BTRFS_I(inode)->generation, + &token); + btrfs_set_token_inode_size(leaf, item, inode->i_size, &token); + } + + btrfs_set_token_inode_uid(leaf, item, i_uid_read(inode), &token); + btrfs_set_token_inode_gid(leaf, item, i_gid_read(inode), &token); + btrfs_set_token_inode_mode(leaf, item, inode->i_mode, &token); + btrfs_set_token_inode_nlink(leaf, item, inode->i_nlink, &token); + + btrfs_set_token_timespec_sec(leaf, btrfs_inode_atime(item), + inode->i_atime.tv_sec, &token); + btrfs_set_token_timespec_nsec(leaf, btrfs_inode_atime(item), + inode->i_atime.tv_nsec, &token); + + btrfs_set_token_timespec_sec(leaf, btrfs_inode_mtime(item), + inode->i_mtime.tv_sec, &token); + btrfs_set_token_timespec_nsec(leaf, btrfs_inode_mtime(item), + inode->i_mtime.tv_nsec, &token); + + btrfs_set_token_timespec_sec(leaf, btrfs_inode_ctime(item), + inode->i_ctime.tv_sec, &token); + btrfs_set_token_timespec_nsec(leaf, btrfs_inode_ctime(item), + inode->i_ctime.tv_nsec, &token); + + btrfs_set_token_inode_nbytes(leaf, item, inode_get_bytes(inode), + &token); + + btrfs_set_token_inode_sequence(leaf, item, inode->i_version, &token); + btrfs_set_token_inode_transid(leaf, item, trans->transid, &token); + btrfs_set_token_inode_rdev(leaf, item, inode->i_rdev, &token); + btrfs_set_token_inode_flags(leaf, item, BTRFS_I(inode)->flags, &token); + btrfs_set_token_inode_block_group(leaf, item, 0, &token); +} +static int log_inode_item(struct btrfs_trans_handle *trans, + struct btrfs_root *log, struct btrfs_path *path, + struct inode *inode) +{ + struct btrfs_inode_item *inode_item; + struct btrfs_key key; + int ret; + + memcpy(&key, &BTRFS_I(inode)->location, sizeof(key)); + ret = btrfs_insert_empty_item(trans, log, path, &key, + sizeof(*inode_item)); + if (ret && ret != -EEXIST) + return ret; + inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0], + struct btrfs_inode_item); + fill_inode_item(trans, path->nodes[0], inode_item, inode, 0); + btrfs_release_path(path); + return 0; } static noinline int copy_items(struct btrfs_trans_handle *trans, @@ -3130,151 +3155,239 @@ static int extent_cmp(void *priv, struct list_head *a, struct list_head *b) return 0; } -struct log_args { - struct extent_buffer *src; - u64 next_offset; - int start_slot; - int nr; -}; +static int drop_adjacent_extents(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct inode *inode, + struct extent_map *em, + struct btrfs_path *path) +{ + struct btrfs_file_extent_item *fi; + struct extent_buffer *leaf; + struct btrfs_key key, new_key; + struct btrfs_map_token token; + u64 extent_end; + u64 extent_offset = 0; + int extent_type; + int del_slot = 0; + int del_nr = 0; + int ret = 0; + + while (1) { + btrfs_init_map_token(&token); + leaf = path->nodes[0]; + path->slots[0]++; + if (path->slots[0] >= btrfs_header_nritems(leaf)) { + if (del_nr) { + ret = btrfs_del_items(trans, root, path, + del_slot, del_nr); + if (ret) + return ret; + del_nr = 0; + } + + ret = btrfs_next_leaf_write(trans, root, path, 1); + if (ret < 0) + return ret; + if (ret > 0) + return 0; + leaf = path->nodes[0]; + } + + btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); + if (key.objectid != btrfs_ino(inode) || + key.type != BTRFS_EXTENT_DATA_KEY || + key.offset >= em->start + em->len) + break; + + fi = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_file_extent_item); + extent_type = btrfs_token_file_extent_type(leaf, fi, &token); + if (extent_type == BTRFS_FILE_EXTENT_REG || + extent_type == BTRFS_FILE_EXTENT_PREALLOC) { + extent_offset = btrfs_token_file_extent_offset(leaf, + fi, &token); + extent_end = key.offset + + btrfs_token_file_extent_num_bytes(leaf, fi, + &token); + } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) { + extent_end = key.offset + + btrfs_file_extent_inline_len(leaf, fi); + } else { + BUG(); + } + + if (extent_end <= em->len + em->start) { + if (!del_nr) { + del_slot = path->slots[0]; + } + del_nr++; + continue; + } + + /* + * Ok so we'll ignore previous items if we log a new extent, + * which can lead to overlapping extents, so if we have an + * existing extent we want to adjust we _have_ to check the next + * guy to make sure we even need this extent anymore, this keeps + * us from panicing in set_item_key_safe. + */ + if (path->slots[0] < btrfs_header_nritems(leaf) - 1) { + struct btrfs_key tmp_key; + + btrfs_item_key_to_cpu(leaf, &tmp_key, + path->slots[0] + 1); + if (tmp_key.objectid == btrfs_ino(inode) && + tmp_key.type == BTRFS_EXTENT_DATA_KEY && + tmp_key.offset <= em->start + em->len) { + if (!del_nr) + del_slot = path->slots[0]; + del_nr++; + continue; + } + } + + BUG_ON(extent_type == BTRFS_FILE_EXTENT_INLINE); + memcpy(&new_key, &key, sizeof(new_key)); + new_key.offset = em->start + em->len; + btrfs_set_item_key_safe(trans, root, path, &new_key); + extent_offset += em->start + em->len - key.offset; + btrfs_set_token_file_extent_offset(leaf, fi, extent_offset, + &token); + btrfs_set_token_file_extent_num_bytes(leaf, fi, extent_end - + (em->start + em->len), + &token); + btrfs_mark_buffer_dirty(leaf); + } + + if (del_nr) + ret = btrfs_del_items(trans, root, path, del_slot, del_nr); + + return ret; +} static int log_one_extent(struct btrfs_trans_handle *trans, struct inode *inode, struct btrfs_root *root, - struct extent_map *em, struct btrfs_path *path, - struct btrfs_path *dst_path, struct log_args *args) + struct extent_map *em, struct btrfs_path *path) { struct btrfs_root *log = root->log_root; struct btrfs_file_extent_item *fi; + struct extent_buffer *leaf; + struct list_head ordered_sums; + struct btrfs_map_token token; struct btrfs_key key; - u64 start = em->mod_start; - u64 search_start = start; - u64 len = em->mod_len; - u64 num_bytes; - int nritems; + u64 csum_offset = em->mod_start - em->start; + u64 csum_len = em->mod_len; + u64 extent_offset = em->start - em->orig_start; + u64 block_len; int ret; + bool skip_csum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM; - if (BTRFS_I(inode)->logged_trans == trans->transid) { - ret = __btrfs_drop_extents(trans, log, inode, dst_path, start, - start + len, NULL, 0); - if (ret) - return ret; + INIT_LIST_HEAD(&ordered_sums); + btrfs_init_map_token(&token); + key.objectid = btrfs_ino(inode); + key.type = BTRFS_EXTENT_DATA_KEY; + key.offset = em->start; + path->really_keep_locks = 1; + + ret = btrfs_insert_empty_item(trans, log, path, &key, sizeof(*fi)); + if (ret && ret != -EEXIST) { + path->really_keep_locks = 0; + return ret; } + leaf = path->nodes[0]; + fi = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_file_extent_item); + btrfs_set_token_file_extent_generation(leaf, fi, em->generation, + &token); + if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) { + skip_csum = true; + btrfs_set_token_file_extent_type(leaf, fi, + BTRFS_FILE_EXTENT_PREALLOC, + &token); + } else { + btrfs_set_token_file_extent_type(leaf, fi, + BTRFS_FILE_EXTENT_REG, + &token); + if (em->block_start == 0) + skip_csum = true; + } + + block_len = max(em->block_len, em->orig_block_len); + if (em->compress_type != BTRFS_COMPRESS_NONE) { + btrfs_set_token_file_extent_disk_bytenr(leaf, fi, + em->block_start, + &token); + btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, block_len, + &token); + } else if (em->block_start < EXTENT_MAP_LAST_BYTE) { + btrfs_set_token_file_extent_disk_bytenr(leaf, fi, + em->block_start - + extent_offset, &token); + btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, block_len, + &token); + } else { + btrfs_set_token_file_extent_disk_bytenr(leaf, fi, 0, &token); + btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, 0, + &token); + } + + btrfs_set_token_file_extent_offset(leaf, fi, + em->start - em->orig_start, + &token); + btrfs_set_token_file_extent_num_bytes(leaf, fi, em->len, &token); + btrfs_set_token_file_extent_ram_bytes(leaf, fi, em->len, &token); + btrfs_set_token_file_extent_compression(leaf, fi, em->compress_type, + &token); + btrfs_set_token_file_extent_encryption(leaf, fi, 0, &token); + btrfs_set_token_file_extent_other_encoding(leaf, fi, 0, &token); + btrfs_mark_buffer_dirty(leaf); - while (len) { - if (args->nr) - goto next_slot; -again: - key.objectid = btrfs_ino(inode); - key.type = BTRFS_EXTENT_DATA_KEY; - key.offset = search_start; - - ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); - if (ret < 0) - return ret; - - if (ret) { - /* - * A rare case were we can have an em for a section of a - * larger extent so we need to make sure that this em - * falls within the extent we've found. If not we just - * bail and go back to ye-olde way of doing things but - * it happens often enough in testing that we need to do - * this dance to make sure. - */ - do { - if (path->slots[0] == 0) { - btrfs_release_path(path); - if (search_start == 0) - return -ENOENT; - search_start--; - goto again; - } + /* + * Have to check the extent to the right of us to make sure it doesn't + * fall in our current range. We're ok if the previous extent is in our + * range since the recovery stuff will run us in key order and thus just + * drop the part we overwrote. + */ + ret = drop_adjacent_extents(trans, log, inode, em, path); + btrfs_release_path(path); + path->really_keep_locks = 0; + if (ret) { + return ret; + } - path->slots[0]--; - btrfs_item_key_to_cpu(path->nodes[0], &key, - path->slots[0]); - if (key.objectid != btrfs_ino(inode) || - key.type != BTRFS_EXTENT_DATA_KEY) { - btrfs_release_path(path); - return -ENOENT; - } - } while (key.offset > start); + if (skip_csum) + return 0; - fi = btrfs_item_ptr(path->nodes[0], path->slots[0], - struct btrfs_file_extent_item); - num_bytes = btrfs_file_extent_num_bytes(path->nodes[0], - fi); - if (key.offset + num_bytes <= start) { - btrfs_release_path(path); - return -ENOENT; - } - } - args->src = path->nodes[0]; -next_slot: - btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); - fi = btrfs_item_ptr(args->src, path->slots[0], - struct btrfs_file_extent_item); - if (args->nr && - args->start_slot + args->nr == path->slots[0]) { - args->nr++; - } else if (args->nr) { - ret = copy_items(trans, inode, dst_path, args->src, - args->start_slot, args->nr, - LOG_INODE_ALL); - if (ret) - return ret; - args->nr = 1; - args->start_slot = path->slots[0]; - } else if (!args->nr) { - args->nr = 1; - args->start_slot = path->slots[0]; - } - nritems = btrfs_header_nritems(path->nodes[0]); - path->slots[0]++; - num_bytes = btrfs_file_extent_num_bytes(args->src, fi); - if (len < num_bytes) { - /* I _think_ this is ok, envision we write to a - * preallocated space that is adjacent to a previously - * written preallocated space that gets merged when we - * mark this preallocated space written. If we do not - * have the adjacent extent in cache then when we copy - * this extent it could end up being larger than our EM - * thinks it is, which is a-ok, so just set len to 0. - */ - len = 0; - } else { - len -= num_bytes; - } - start = key.offset + num_bytes; - args->next_offset = start; - search_start = start; + if (em->compress_type) { + csum_offset = 0; + csum_len = block_len; + } - if (path->slots[0] < nritems) { - if (len) - goto next_slot; - break; - } + /* block start is already adjusted for the file extent offset. */ + ret = btrfs_lookup_csums_range(log->fs_info->csum_root, + em->block_start + csum_offset, + em->block_start + csum_offset + + csum_len - 1, &ordered_sums, 0); + if (ret) + return ret; - if (args->nr) { - ret = copy_items(trans, inode, dst_path, args->src, - args->start_slot, args->nr, - LOG_INODE_ALL); - if (ret) - return ret; - args->nr = 0; - btrfs_release_path(path); - } + while (!list_empty(&ordered_sums)) { + struct btrfs_ordered_sum *sums = list_entry(ordered_sums.next, + struct btrfs_ordered_sum, + list); + if (!ret) + ret = btrfs_csum_file_blocks(trans, log, sums); + list_del(&sums->list); + kfree(sums); } - return 0; + return ret; } static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode, - struct btrfs_path *path, - struct btrfs_path *dst_path) + struct btrfs_path *path) { - struct log_args args; struct extent_map *em, *n; struct list_head extents; struct extent_map_tree *tree = &BTRFS_I(inode)->extent_tree; @@ -3283,8 +3396,6 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans, INIT_LIST_HEAD(&extents); - memset(&args, 0, sizeof(args)); - write_lock(&tree->lock); test_gen = root->fs_info->last_trans_committed; @@ -3304,47 +3415,27 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans, em = list_entry(extents.next, struct extent_map, list); list_del_init(&em->list); - clear_bit(EXTENT_FLAG_LOGGING, &em->flags); /* * If we had an error we just need to delete everybody from our * private list. */ if (ret) { + clear_em_logging(tree, em); free_extent_map(em); continue; } write_unlock(&tree->lock); - /* - * If the previous EM and the last extent we left off on aren't - * sequential then we need to copy the items we have and redo - * our search - */ - if (args.nr && em->mod_start != args.next_offset) { - ret = copy_items(trans, inode, dst_path, args.src, - args.start_slot, args.nr, - LOG_INODE_ALL); - if (ret) { - free_extent_map(em); - write_lock(&tree->lock); - continue; - } - btrfs_release_path(path); - args.nr = 0; - } - - ret = log_one_extent(trans, inode, root, em, path, dst_path, &args); - free_extent_map(em); + ret = log_one_extent(trans, inode, root, em, path); write_lock(&tree->lock); + clear_em_logging(tree, em); + free_extent_map(em); } WARN_ON(!list_empty(&extents)); write_unlock(&tree->lock); - if (!ret && args.nr) - ret = copy_items(trans, inode, dst_path, args.src, - args.start_slot, args.nr, LOG_INODE_ALL); btrfs_release_path(path); return ret; } @@ -3400,7 +3491,10 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, /* today the code can only do partial logging of directories */ - if (inode_only == LOG_INODE_EXISTS || S_ISDIR(inode->i_mode)) + if (S_ISDIR(inode->i_mode) || + (!test_bit(BTRFS_INODE_NEEDS_FULL_SYNC, + &BTRFS_I(inode)->runtime_flags) && + inode_only == LOG_INODE_EXISTS)) max_key.type = BTRFS_XATTR_ITEM_KEY; else max_key.type = (u8)-1; @@ -3432,14 +3526,28 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, } else { if (test_and_clear_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(inode)->runtime_flags)) { + clear_bit(BTRFS_INODE_COPY_EVERYTHING, + &BTRFS_I(inode)->runtime_flags); ret = btrfs_truncate_inode_items(trans, log, inode, 0, 0); - } else { - fast_search = true; + } else if (test_and_clear_bit(BTRFS_INODE_COPY_EVERYTHING, + &BTRFS_I(inode)->runtime_flags)) { + if (inode_only == LOG_INODE_ALL) + fast_search = true; max_key.type = BTRFS_XATTR_ITEM_KEY; ret = drop_objectid_items(trans, log, path, ino, - BTRFS_XATTR_ITEM_KEY); + max_key.type); + } else { + if (inode_only == LOG_INODE_ALL) + fast_search = true; + ret = log_inode_item(trans, log, dst_path, inode); + if (ret) { + err = ret; + goto out_unlock; + } + goto log_extents; } + } if (ret) { err = ret; @@ -3518,11 +3626,10 @@ next_slot: ins_nr = 0; } +log_extents: if (fast_search) { - btrfs_release_path(path); btrfs_release_path(dst_path); - ret = btrfs_log_changed_extents(trans, root, inode, path, - dst_path); + ret = btrfs_log_changed_extents(trans, root, inode, dst_path); if (ret) { err = ret; goto out_unlock; @@ -3531,8 +3638,10 @@ next_slot: struct extent_map_tree *tree = &BTRFS_I(inode)->extent_tree; struct extent_map *em, *n; + write_lock(&tree->lock); list_for_each_entry_safe(em, n, &tree->modified_extents, list) list_del_init(&em->list); + write_unlock(&tree->lock); } if (inode_only == LOG_INODE_ALL && S_ISDIR(inode->i_mode)) { diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index e3c6ee3cc2b..15f6efdf646 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -25,7 +25,6 @@ #include <linux/capability.h> #include <linux/ratelimit.h> #include <linux/kthread.h> -#include <asm/div64.h> #include "compat.h" #include "ctree.h" #include "extent_map.h" @@ -36,6 +35,8 @@ #include "async-thread.h" #include "check-integrity.h" #include "rcu-string.h" +#include "math.h" +#include "dev-replace.h" static int init_first_rw_device(struct btrfs_trans_handle *trans, struct btrfs_root *root, @@ -71,6 +72,19 @@ static void free_fs_devices(struct btrfs_fs_devices *fs_devices) kfree(fs_devices); } +static void btrfs_kobject_uevent(struct block_device *bdev, + enum kobject_action action) +{ + int ret; + + ret = kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, action); + if (ret) + pr_warn("Sending event '%d' to kobject: '%s' (%p): failed\n", + action, + kobject_name(&disk_to_dev(bdev->bd_disk)->kobj), + &disk_to_dev(bdev->bd_disk)->kobj); +} + void btrfs_cleanup_fs_uuids(void) { struct btrfs_fs_devices *fs_devices; @@ -108,6 +122,44 @@ static noinline struct btrfs_fs_devices *find_fsid(u8 *fsid) return NULL; } +static int +btrfs_get_bdev_and_sb(const char *device_path, fmode_t flags, void *holder, + int flush, struct block_device **bdev, + struct buffer_head **bh) +{ + int ret; + + *bdev = blkdev_get_by_path(device_path, flags, holder); + + if (IS_ERR(*bdev)) { + ret = PTR_ERR(*bdev); + printk(KERN_INFO "btrfs: open %s failed\n", device_path); + goto error; + } + + if (flush) + filemap_write_and_wait((*bdev)->bd_inode->i_mapping); + ret = set_blocksize(*bdev, 4096); + if (ret) { + blkdev_put(*bdev, flags); + goto error; + } + invalidate_bdev(*bdev); + *bh = btrfs_read_dev_super(*bdev); + if (!*bh) { + ret = -EINVAL; + blkdev_put(*bdev, flags); + goto error; + } + + return 0; + +error: + *bdev = NULL; + *bh = NULL; + return ret; +} + static void requeue_list(struct btrfs_pending_bios *pending_bios, struct bio *head, struct bio *tail) { @@ -467,7 +519,8 @@ error: return ERR_PTR(-ENOMEM); } -void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices) +void btrfs_close_extra_devices(struct btrfs_fs_info *fs_info, + struct btrfs_fs_devices *fs_devices, int step) { struct btrfs_device *device, *next; @@ -480,8 +533,9 @@ again: /* This is the initialized path, it is safe to release the devices. */ list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) { if (device->in_fs_metadata) { - if (!latest_transid || - device->generation > latest_transid) { + if (!device->is_tgtdev_for_dev_replace && + (!latest_transid || + device->generation > latest_transid)) { latest_devid = device->devid; latest_transid = device->generation; latest_bdev = device->bdev; @@ -489,6 +543,21 @@ again: continue; } + if (device->devid == BTRFS_DEV_REPLACE_DEVID) { + /* + * In the first step, keep the device which has + * the correct fsid and the devid that is used + * for the dev_replace procedure. + * In the second step, the dev_replace state is + * read from the device tree and it is known + * whether the procedure is really active or + * not, which means whether this device is + * used or whether it should be removed. + */ + if (step == 0 || device->is_tgtdev_for_dev_replace) { + continue; + } + } if (device->bdev) { blkdev_put(device->bdev, device->mode); device->bdev = NULL; @@ -497,7 +566,8 @@ again: if (device->writeable) { list_del_init(&device->dev_alloc_list); device->writeable = 0; - fs_devices->rw_devices--; + if (!device->is_tgtdev_for_dev_replace) + fs_devices->rw_devices--; } list_del_init(&device->dev_list); fs_devices->num_devices--; @@ -555,7 +625,7 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices) if (device->bdev) fs_devices->open_devices--; - if (device->writeable) { + if (device->writeable && !device->is_tgtdev_for_dev_replace) { list_del_init(&device->dev_alloc_list); fs_devices->rw_devices--; } @@ -637,18 +707,10 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices, if (!device->name) continue; - bdev = blkdev_get_by_path(device->name->str, flags, holder); - if (IS_ERR(bdev)) { - printk(KERN_INFO "btrfs: open %s failed\n", device->name->str); - goto error; - } - filemap_write_and_wait(bdev->bd_inode->i_mapping); - invalidate_bdev(bdev); - set_blocksize(bdev, 4096); - - bh = btrfs_read_dev_super(bdev); - if (!bh) - goto error_close; + ret = btrfs_get_bdev_and_sb(device->name->str, flags, holder, 1, + &bdev, &bh); + if (ret) + continue; disk_super = (struct btrfs_super_block *)bh->b_data; devid = btrfs_stack_device_id(&disk_super->dev_item); @@ -687,7 +749,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices, fs_devices->rotating = 1; fs_devices->open_devices++; - if (device->writeable) { + if (device->writeable && !device->is_tgtdev_for_dev_replace) { fs_devices->rw_devices++; list_add(&device->dev_alloc_list, &fs_devices->alloc_list); @@ -697,9 +759,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices, error_brelse: brelse(bh); -error_close: blkdev_put(bdev, flags); -error: continue; } if (fs_devices->open_devices == 0) { @@ -744,40 +804,30 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, u64 total_devices; flags |= FMODE_EXCL; - bdev = blkdev_get_by_path(path, flags, holder); - - if (IS_ERR(bdev)) { - ret = PTR_ERR(bdev); - goto error; - } - mutex_lock(&uuid_mutex); - ret = set_blocksize(bdev, 4096); + ret = btrfs_get_bdev_and_sb(path, flags, holder, 0, &bdev, &bh); if (ret) - goto error_close; - bh = btrfs_read_dev_super(bdev); - if (!bh) { - ret = -EINVAL; - goto error_close; - } + goto error; disk_super = (struct btrfs_super_block *)bh->b_data; devid = btrfs_stack_device_id(&disk_super->dev_item); transid = btrfs_super_generation(disk_super); total_devices = btrfs_super_num_devices(disk_super); - if (disk_super->label[0]) + if (disk_super->label[0]) { + if (disk_super->label[BTRFS_LABEL_SIZE - 1]) + disk_super->label[BTRFS_LABEL_SIZE - 1] = '\0'; printk(KERN_INFO "device label %s ", disk_super->label); - else + } else { printk(KERN_INFO "device fsid %pU ", disk_super->fsid); + } printk(KERN_CONT "devid %llu transid %llu %s\n", (unsigned long long)devid, (unsigned long long)transid, path); ret = device_list_add(path, disk_super, devid, fs_devices_ret); if (!ret && fs_devices_ret) (*fs_devices_ret)->total_devices = total_devices; brelse(bh); -error_close: - mutex_unlock(&uuid_mutex); blkdev_put(bdev, flags); error: + mutex_unlock(&uuid_mutex); return ret; } @@ -796,7 +846,7 @@ int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, *length = 0; - if (start >= device->total_bytes) + if (start >= device->total_bytes || device->is_tgtdev_for_dev_replace) return 0; path = btrfs_alloc_path(); @@ -913,7 +963,7 @@ int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes, max_hole_size = 0; hole_size = 0; - if (search_start >= search_end) { + if (search_start >= search_end || device->is_tgtdev_for_dev_replace) { ret = -ENOSPC; goto error; } @@ -1096,6 +1146,7 @@ int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, struct btrfs_key key; WARN_ON(!device->in_fs_metadata); + WARN_ON(device->is_tgtdev_for_dev_replace); path = btrfs_alloc_path(); if (!path) return -ENOMEM; @@ -1330,16 +1381,22 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) root->fs_info->avail_system_alloc_bits | root->fs_info->avail_metadata_alloc_bits; - if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && - root->fs_info->fs_devices->num_devices <= 4) { + num_devices = root->fs_info->fs_devices->num_devices; + btrfs_dev_replace_lock(&root->fs_info->dev_replace); + if (btrfs_dev_replace_is_ongoing(&root->fs_info->dev_replace)) { + WARN_ON(num_devices < 1); + num_devices--; + } + btrfs_dev_replace_unlock(&root->fs_info->dev_replace); + + if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && num_devices <= 4) { printk(KERN_ERR "btrfs: unable to go below four devices " "on raid10\n"); ret = -EINVAL; goto out; } - if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) && - root->fs_info->fs_devices->num_devices <= 2) { + if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) && num_devices <= 2) { printk(KERN_ERR "btrfs: unable to go below two " "devices on raid1\n"); ret = -EINVAL; @@ -1357,7 +1414,9 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) * is held. */ list_for_each_entry(tmp, devices, dev_list) { - if (tmp->in_fs_metadata && !tmp->bdev) { + if (tmp->in_fs_metadata && + !tmp->is_tgtdev_for_dev_replace && + !tmp->bdev) { device = tmp; break; } @@ -1371,24 +1430,16 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) goto out; } } else { - bdev = blkdev_get_by_path(device_path, FMODE_READ | FMODE_EXCL, - root->fs_info->bdev_holder); - if (IS_ERR(bdev)) { - ret = PTR_ERR(bdev); + ret = btrfs_get_bdev_and_sb(device_path, + FMODE_WRITE | FMODE_EXCL, + root->fs_info->bdev_holder, 0, + &bdev, &bh); + if (ret) goto out; - } - - set_blocksize(bdev, 4096); - invalidate_bdev(bdev); - bh = btrfs_read_dev_super(bdev); - if (!bh) { - ret = -EINVAL; - goto error_close; - } disk_super = (struct btrfs_super_block *)bh->b_data; devid = btrfs_stack_device_id(&disk_super->dev_item); dev_uuid = disk_super->dev_item.uuid; - device = btrfs_find_device(root, devid, dev_uuid, + device = btrfs_find_device(root->fs_info, devid, dev_uuid, disk_super->fsid); if (!device) { ret = -ENOENT; @@ -1396,6 +1447,12 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) } } + if (device->is_tgtdev_for_dev_replace) { + pr_err("btrfs: unable to remove the dev_replace target dev\n"); + ret = -EINVAL; + goto error_brelse; + } + if (device->writeable && root->fs_info->fs_devices->rw_devices == 1) { printk(KERN_ERR "btrfs: unable to remove the only writeable " "device\n"); @@ -1415,6 +1472,11 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) if (ret) goto error_undo; + /* + * TODO: the superblock still includes this device in its num_devices + * counter although write_all_supers() is not locked out. This + * could give a filesystem state which requires a degraded mount. + */ ret = btrfs_rm_dev_item(root->fs_info->chunk_root, device); if (ret) goto error_undo; @@ -1425,7 +1487,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) spin_unlock(&root->fs_info->free_chunk_lock); device->in_fs_metadata = 0; - btrfs_scrub_cancel_dev(root, device); + btrfs_scrub_cancel_dev(root->fs_info, device); /* * the device list mutex makes sure that we don't change @@ -1482,7 +1544,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) * at this point, the device is zero sized. We want to * remove it from the devices list and zero out the old super */ - if (clear_super) { + if (clear_super && disk_super) { /* make sure this device isn't detected as part of * the FS anymore */ @@ -1493,9 +1555,11 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) ret = 0; + /* Notify udev that device has changed */ + btrfs_kobject_uevent(bdev, KOBJ_CHANGE); + error_brelse: brelse(bh); -error_close: if (bdev) blkdev_put(bdev, FMODE_READ | FMODE_EXCL); out: @@ -1512,6 +1576,112 @@ error_undo: goto error_brelse; } +void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info, + struct btrfs_device *srcdev) +{ + WARN_ON(!mutex_is_locked(&fs_info->fs_devices->device_list_mutex)); + list_del_rcu(&srcdev->dev_list); + list_del_rcu(&srcdev->dev_alloc_list); + fs_info->fs_devices->num_devices--; + if (srcdev->missing) { + fs_info->fs_devices->missing_devices--; + fs_info->fs_devices->rw_devices++; + } + if (srcdev->can_discard) + fs_info->fs_devices->num_can_discard--; + if (srcdev->bdev) + fs_info->fs_devices->open_devices--; + + call_rcu(&srcdev->rcu, free_device); +} + +void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, + struct btrfs_device *tgtdev) +{ + struct btrfs_device *next_device; + + WARN_ON(!tgtdev); + mutex_lock(&fs_info->fs_devices->device_list_mutex); + if (tgtdev->bdev) { + btrfs_scratch_superblock(tgtdev); + fs_info->fs_devices->open_devices--; + } + fs_info->fs_devices->num_devices--; + if (tgtdev->can_discard) + fs_info->fs_devices->num_can_discard++; + + next_device = list_entry(fs_info->fs_devices->devices.next, + struct btrfs_device, dev_list); + if (tgtdev->bdev == fs_info->sb->s_bdev) + fs_info->sb->s_bdev = next_device->bdev; + if (tgtdev->bdev == fs_info->fs_devices->latest_bdev) + fs_info->fs_devices->latest_bdev = next_device->bdev; + list_del_rcu(&tgtdev->dev_list); + + call_rcu(&tgtdev->rcu, free_device); + + mutex_unlock(&fs_info->fs_devices->device_list_mutex); +} + +int btrfs_find_device_by_path(struct btrfs_root *root, char *device_path, + struct btrfs_device **device) +{ + int ret = 0; + struct btrfs_super_block *disk_super; + u64 devid; + u8 *dev_uuid; + struct block_device *bdev; + struct buffer_head *bh; + + *device = NULL; + ret = btrfs_get_bdev_and_sb(device_path, FMODE_READ, + root->fs_info->bdev_holder, 0, &bdev, &bh); + if (ret) + return ret; + disk_super = (struct btrfs_super_block *)bh->b_data; + devid = btrfs_stack_device_id(&disk_super->dev_item); + dev_uuid = disk_super->dev_item.uuid; + *device = btrfs_find_device(root->fs_info, devid, dev_uuid, + disk_super->fsid); + brelse(bh); + if (!*device) + ret = -ENOENT; + blkdev_put(bdev, FMODE_READ); + return ret; +} + +int btrfs_find_device_missing_or_by_path(struct btrfs_root *root, + char *device_path, + struct btrfs_device **device) +{ + *device = NULL; + if (strcmp(device_path, "missing") == 0) { + struct list_head *devices; + struct btrfs_device *tmp; + + devices = &root->fs_info->fs_devices->devices; + /* + * It is safe to read the devices since the volume_mutex + * is held by the caller. + */ + list_for_each_entry(tmp, devices, dev_list) { + if (tmp->in_fs_metadata && !tmp->bdev) { + *device = tmp; + break; + } + } + + if (!*device) { + pr_err("btrfs: no missing device found\n"); + return -ENOENT; + } + + return 0; + } else { + return btrfs_find_device_by_path(root, device_path, device); + } +} + /* * does all the dirty work required for changing file system's UUID. */ @@ -1630,7 +1800,8 @@ next_slot: read_extent_buffer(leaf, fs_uuid, (unsigned long)btrfs_device_fsid(dev_item), BTRFS_UUID_SIZE); - device = btrfs_find_device(root, devid, dev_uuid, fs_uuid); + device = btrfs_find_device(root->fs_info, devid, dev_uuid, + fs_uuid); BUG_ON(!device); /* Logic error */ if (device->fs_devices->seeding) { @@ -1678,16 +1849,17 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) filemap_write_and_wait(bdev->bd_inode->i_mapping); devices = &root->fs_info->fs_devices->devices; - /* - * we have the volume lock, so we don't need the extra - * device list mutex while reading the list here. - */ + + mutex_lock(&root->fs_info->fs_devices->device_list_mutex); list_for_each_entry(device, devices, dev_list) { if (device->bdev == bdev) { ret = -EEXIST; + mutex_unlock( + &root->fs_info->fs_devices->device_list_mutex); goto error; } } + mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); device = kzalloc(sizeof(*device), GFP_NOFS); if (!device) { @@ -1737,6 +1909,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) device->dev_root = root->fs_info->dev_root; device->bdev = bdev; device->in_fs_metadata = 1; + device->is_tgtdev_for_dev_replace = 0; device->mode = FMODE_EXCL; set_blocksize(device->bdev, 4096); @@ -1844,6 +2017,98 @@ error: return ret; } +int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path, + struct btrfs_device **device_out) +{ + struct request_queue *q; + struct btrfs_device *device; + struct block_device *bdev; + struct btrfs_fs_info *fs_info = root->fs_info; + struct list_head *devices; + struct rcu_string *name; + int ret = 0; + + *device_out = NULL; + if (fs_info->fs_devices->seeding) + return -EINVAL; + + bdev = blkdev_get_by_path(device_path, FMODE_WRITE | FMODE_EXCL, + fs_info->bdev_holder); + if (IS_ERR(bdev)) + return PTR_ERR(bdev); + + filemap_write_and_wait(bdev->bd_inode->i_mapping); + + devices = &fs_info->fs_devices->devices; + list_for_each_entry(device, devices, dev_list) { + if (device->bdev == bdev) { + ret = -EEXIST; + goto error; + } + } + + device = kzalloc(sizeof(*device), GFP_NOFS); + if (!device) { + ret = -ENOMEM; + goto error; + } + + name = rcu_string_strdup(device_path, GFP_NOFS); + if (!name) { + kfree(device); + ret = -ENOMEM; + goto error; + } + rcu_assign_pointer(device->name, name); + + q = bdev_get_queue(bdev); + if (blk_queue_discard(q)) + device->can_discard = 1; + mutex_lock(&root->fs_info->fs_devices->device_list_mutex); + device->writeable = 1; + device->work.func = pending_bios_fn; + generate_random_uuid(device->uuid); + device->devid = BTRFS_DEV_REPLACE_DEVID; + spin_lock_init(&device->io_lock); + device->generation = 0; + device->io_width = root->sectorsize; + device->io_align = root->sectorsize; + device->sector_size = root->sectorsize; + device->total_bytes = i_size_read(bdev->bd_inode); + device->disk_total_bytes = device->total_bytes; + device->dev_root = fs_info->dev_root; + device->bdev = bdev; + device->in_fs_metadata = 1; + device->is_tgtdev_for_dev_replace = 1; + device->mode = FMODE_EXCL; + set_blocksize(device->bdev, 4096); + device->fs_devices = fs_info->fs_devices; + list_add(&device->dev_list, &fs_info->fs_devices->devices); + fs_info->fs_devices->num_devices++; + fs_info->fs_devices->open_devices++; + if (device->can_discard) + fs_info->fs_devices->num_can_discard++; + mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); + + *device_out = device; + return ret; + +error: + blkdev_put(bdev, FMODE_EXCL); + return ret; +} + +void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info, + struct btrfs_device *tgtdev) +{ + WARN_ON(fs_info->fs_devices->rw_devices == 0); + tgtdev->io_width = fs_info->dev_root->sectorsize; + tgtdev->io_align = fs_info->dev_root->sectorsize; + tgtdev->sector_size = fs_info->dev_root->sectorsize; + tgtdev->dev_root = fs_info->dev_root; + tgtdev->in_fs_metadata = 1; +} + static noinline int btrfs_update_device(struct btrfs_trans_handle *trans, struct btrfs_device *device) { @@ -1900,7 +2165,8 @@ static int __btrfs_grow_device(struct btrfs_trans_handle *trans, if (!device->writeable) return -EACCES; - if (new_size <= device->total_bytes) + if (new_size <= device->total_bytes || + device->is_tgtdev_for_dev_replace) return -EINVAL; btrfs_set_super_total_bytes(super_copy, old_total + diff); @@ -2338,18 +2604,6 @@ static int chunk_profiles_filter(u64 chunk_type, return 1; } -static u64 div_factor_fine(u64 num, int factor) -{ - if (factor <= 0) - return 0; - if (factor >= 100) - return num; - - num *= factor; - do_div(num, 100); - return num; -} - static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset, struct btrfs_balance_args *bargs) { @@ -2360,7 +2614,14 @@ static int chunk_usage_filter(struct btrfs_fs_info *fs_info, u64 chunk_offset, cache = btrfs_lookup_block_group(fs_info, chunk_offset); chunk_used = btrfs_block_group_used(&cache->item); - user_thresh = div_factor_fine(cache->key.offset, bargs->usage); + if (bargs->usage == 0) + user_thresh = 0; + else if (bargs->usage > 100) + user_thresh = cache->key.offset; + else + user_thresh = div_factor_fine(cache->key.offset, + bargs->usage); + if (chunk_used < user_thresh) ret = 0; @@ -2514,15 +2775,6 @@ static int should_balance_chunk(struct btrfs_root *root, return 1; } -static u64 div_factor(u64 num, int factor) -{ - if (factor == 10) - return num; - num *= factor; - do_div(num, 10); - return num; -} - static int __btrfs_balance(struct btrfs_fs_info *fs_info) { struct btrfs_balance_control *bctl = fs_info->balance_ctl; @@ -2550,7 +2802,8 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info) size_to_free = div_factor(old_size, 1); size_to_free = min(size_to_free, (u64)1 * 1024 * 1024); if (!device->writeable || - device->total_bytes - device->bytes_used > size_to_free) + device->total_bytes - device->bytes_used > size_to_free || + device->is_tgtdev_for_dev_replace) continue; ret = btrfs_shrink_device(device, old_size - size_to_free); @@ -2713,6 +2966,8 @@ static void __cancel_balance(struct btrfs_fs_info *fs_info) unset_balance_control(fs_info); ret = del_balance_item(fs_info->tree_root); BUG_ON(ret); + + atomic_set(&fs_info->mutually_exclusive_operation_running, 0); } void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, @@ -2728,6 +2983,7 @@ int btrfs_balance(struct btrfs_balance_control *bctl, u64 allowed; int mixed = 0; int ret; + u64 num_devices; if (btrfs_fs_closing(fs_info) || atomic_read(&fs_info->balance_pause_req) || @@ -2756,10 +3012,17 @@ int btrfs_balance(struct btrfs_balance_control *bctl, } } + num_devices = fs_info->fs_devices->num_devices; + btrfs_dev_replace_lock(&fs_info->dev_replace); + if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) { + BUG_ON(num_devices < 1); + num_devices--; + } + btrfs_dev_replace_unlock(&fs_info->dev_replace); allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE; - if (fs_info->fs_devices->num_devices == 1) + if (num_devices == 1) allowed |= BTRFS_BLOCK_GROUP_DUP; - else if (fs_info->fs_devices->num_devices < 4) + else if (num_devices < 4) allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1); else allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 | @@ -2884,8 +3147,10 @@ int btrfs_balance(struct btrfs_balance_control *bctl, out: if (bctl->flags & BTRFS_BALANCE_RESUME) __cancel_balance(fs_info); - else + else { kfree(bctl); + atomic_set(&fs_info->mutually_exclusive_operation_running, 0); + } return ret; } @@ -2977,6 +3242,8 @@ int btrfs_recover_balance(struct btrfs_fs_info *fs_info) btrfs_balance_sys(leaf, item, &disk_bargs); btrfs_disk_balance_args_to_cpu(&bctl->sys, &disk_bargs); + WARN_ON(atomic_xchg(&fs_info->mutually_exclusive_operation_running, 1)); + mutex_lock(&fs_info->volume_mutex); mutex_lock(&fs_info->balance_mutex); @@ -3080,7 +3347,7 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size) u64 old_size = device->total_bytes; u64 diff = device->total_bytes - new_size; - if (new_size >= device->total_bytes) + if (device->is_tgtdev_for_dev_replace) return -EINVAL; path = btrfs_alloc_path(); @@ -3235,6 +3502,14 @@ static int btrfs_cmp_device_info(const void *a, const void *b) return 0; } +struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = { + { 2, 1, 0, 4, 2, 2 /* raid10 */ }, + { 1, 1, 2, 2, 2, 2 /* raid1 */ }, + { 1, 2, 1, 1, 1, 2 /* dup */ }, + { 1, 1, 0, 2, 1, 1 /* raid0 */ }, + { 1, 1, 1, 1, 1, 1 /* single */ }, +}; + static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, struct btrfs_root *extent_root, struct map_lookup **map_ret, @@ -3264,43 +3539,21 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, int ndevs; int i; int j; + int index; BUG_ON(!alloc_profile_is_valid(type, 0)); if (list_empty(&fs_devices->alloc_list)) return -ENOSPC; - sub_stripes = 1; - dev_stripes = 1; - devs_increment = 1; - ncopies = 1; - devs_max = 0; /* 0 == as many as possible */ - devs_min = 1; + index = __get_raid_index(type); - /* - * define the properties of each RAID type. - * FIXME: move this to a global table and use it in all RAID - * calculation code - */ - if (type & (BTRFS_BLOCK_GROUP_DUP)) { - dev_stripes = 2; - ncopies = 2; - devs_max = 1; - } else if (type & (BTRFS_BLOCK_GROUP_RAID0)) { - devs_min = 2; - } else if (type & (BTRFS_BLOCK_GROUP_RAID1)) { - devs_increment = 2; - ncopies = 2; - devs_max = 2; - devs_min = 2; - } else if (type & (BTRFS_BLOCK_GROUP_RAID10)) { - sub_stripes = 2; - devs_increment = 2; - ncopies = 2; - devs_min = 4; - } else { - devs_max = 1; - } + sub_stripes = btrfs_raid_array[index].sub_stripes; + dev_stripes = btrfs_raid_array[index].dev_stripes; + devs_max = btrfs_raid_array[index].devs_max; + devs_min = btrfs_raid_array[index].devs_min; + devs_increment = btrfs_raid_array[index].devs_increment; + ncopies = btrfs_raid_array[index].ncopies; if (type & BTRFS_BLOCK_GROUP_DATA) { max_stripe_size = 1024 * 1024 * 1024; @@ -3347,13 +3600,13 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, cur = cur->next; if (!device->writeable) { - printk(KERN_ERR + WARN(1, KERN_ERR "btrfs: read-only device in alloc_list\n"); - WARN_ON(1); continue; } - if (!device->in_fs_metadata) + if (!device->in_fs_metadata || + device->is_tgtdev_for_dev_replace) continue; if (device->total_bytes > device->bytes_used) @@ -3382,6 +3635,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, devices_info[ndevs].total_avail = total_avail; devices_info[ndevs].dev = device; ++ndevs; + WARN_ON(ndevs > fs_devices->rw_devices); } /* @@ -3740,8 +3994,9 @@ void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree) } } -int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len) +int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len) { + struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree; struct extent_map *em; struct map_lookup *map; struct extent_map_tree *em_tree = &map_tree->map_tree; @@ -3761,32 +4016,60 @@ int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len) else ret = 1; free_extent_map(em); + + btrfs_dev_replace_lock(&fs_info->dev_replace); + if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) + ret++; + btrfs_dev_replace_unlock(&fs_info->dev_replace); + return ret; } -static int find_live_mirror(struct map_lookup *map, int first, int num, - int optimal) +static int find_live_mirror(struct btrfs_fs_info *fs_info, + struct map_lookup *map, int first, int num, + int optimal, int dev_replace_is_ongoing) { int i; - if (map->stripes[optimal].dev->bdev) - return optimal; - for (i = first; i < first + num; i++) { - if (map->stripes[i].dev->bdev) - return i; + int tolerance; + struct btrfs_device *srcdev; + + if (dev_replace_is_ongoing && + fs_info->dev_replace.cont_reading_from_srcdev_mode == + BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID) + srcdev = fs_info->dev_replace.srcdev; + else + srcdev = NULL; + + /* + * try to avoid the drive that is the source drive for a + * dev-replace procedure, only choose it if no other non-missing + * mirror is available + */ + for (tolerance = 0; tolerance < 2; tolerance++) { + if (map->stripes[optimal].dev->bdev && + (tolerance || map->stripes[optimal].dev != srcdev)) + return optimal; + for (i = first; i < first + num; i++) { + if (map->stripes[i].dev->bdev && + (tolerance || map->stripes[i].dev != srcdev)) + return i; + } } + /* we couldn't find one that doesn't fail. Just return something * and the io error handling code will clean up eventually */ return optimal; } -static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, +static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, u64 logical, u64 *length, struct btrfs_bio **bbio_ret, int mirror_num) { struct extent_map *em; struct map_lookup *map; + struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree; struct extent_map_tree *em_tree = &map_tree->map_tree; u64 offset; u64 stripe_offset; @@ -3800,6 +4083,11 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, int num_stripes; int max_errors = 0; struct btrfs_bio *bbio = NULL; + struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; + int dev_replace_is_ongoing = 0; + int num_alloc_stripes; + int patch_the_first_stripe_for_dev_replace = 0; + u64 physical_to_patch_in_first_stripe = 0; read_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, logical, *length); @@ -3816,9 +4104,6 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, map = (struct map_lookup *)em->bdev; offset = logical - em->start; - if (mirror_num > map->num_stripes) - mirror_num = 0; - stripe_nr = offset; /* * stripe_nr counts the total number of stripes we have to stride @@ -3845,6 +4130,93 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, if (!bbio_ret) goto out; + btrfs_dev_replace_lock(dev_replace); + dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace); + if (!dev_replace_is_ongoing) + btrfs_dev_replace_unlock(dev_replace); + + if (dev_replace_is_ongoing && mirror_num == map->num_stripes + 1 && + !(rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) && + dev_replace->tgtdev != NULL) { + /* + * in dev-replace case, for repair case (that's the only + * case where the mirror is selected explicitly when + * calling btrfs_map_block), blocks left of the left cursor + * can also be read from the target drive. + * For REQ_GET_READ_MIRRORS, the target drive is added as + * the last one to the array of stripes. For READ, it also + * needs to be supported using the same mirror number. + * If the requested block is not left of the left cursor, + * EIO is returned. This can happen because btrfs_num_copies() + * returns one more in the dev-replace case. + */ + u64 tmp_length = *length; + struct btrfs_bio *tmp_bbio = NULL; + int tmp_num_stripes; + u64 srcdev_devid = dev_replace->srcdev->devid; + int index_srcdev = 0; + int found = 0; + u64 physical_of_found = 0; + + ret = __btrfs_map_block(fs_info, REQ_GET_READ_MIRRORS, + logical, &tmp_length, &tmp_bbio, 0); + if (ret) { + WARN_ON(tmp_bbio != NULL); + goto out; + } + + tmp_num_stripes = tmp_bbio->num_stripes; + if (mirror_num > tmp_num_stripes) { + /* + * REQ_GET_READ_MIRRORS does not contain this + * mirror, that means that the requested area + * is not left of the left cursor + */ + ret = -EIO; + kfree(tmp_bbio); + goto out; + } + + /* + * process the rest of the function using the mirror_num + * of the source drive. Therefore look it up first. + * At the end, patch the device pointer to the one of the + * target drive. + */ + for (i = 0; i < tmp_num_stripes; i++) { + if (tmp_bbio->stripes[i].dev->devid == srcdev_devid) { + /* + * In case of DUP, in order to keep it + * simple, only add the mirror with the + * lowest physical address + */ + if (found && + physical_of_found <= + tmp_bbio->stripes[i].physical) + continue; + index_srcdev = i; + found = 1; + physical_of_found = + tmp_bbio->stripes[i].physical; + } + } + + if (found) { + mirror_num = index_srcdev + 1; + patch_the_first_stripe_for_dev_replace = 1; + physical_to_patch_in_first_stripe = physical_of_found; + } else { + WARN_ON(1); + ret = -EIO; + kfree(tmp_bbio); + goto out; + } + + kfree(tmp_bbio); + } else if (mirror_num > map->num_stripes) { + mirror_num = 0; + } + num_stripes = 1; stripe_index = 0; stripe_nr_orig = stripe_nr; @@ -3859,19 +4231,20 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, stripe_nr_end - stripe_nr_orig); stripe_index = do_div(stripe_nr, map->num_stripes); } else if (map->type & BTRFS_BLOCK_GROUP_RAID1) { - if (rw & (REQ_WRITE | REQ_DISCARD)) + if (rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) num_stripes = map->num_stripes; else if (mirror_num) stripe_index = mirror_num - 1; else { - stripe_index = find_live_mirror(map, 0, + stripe_index = find_live_mirror(fs_info, map, 0, map->num_stripes, - current->pid % map->num_stripes); + current->pid % map->num_stripes, + dev_replace_is_ongoing); mirror_num = stripe_index + 1; } } else if (map->type & BTRFS_BLOCK_GROUP_DUP) { - if (rw & (REQ_WRITE | REQ_DISCARD)) { + if (rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) { num_stripes = map->num_stripes; } else if (mirror_num) { stripe_index = mirror_num - 1; @@ -3885,7 +4258,7 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, stripe_index = do_div(stripe_nr, factor); stripe_index *= map->sub_stripes; - if (rw & REQ_WRITE) + if (rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) num_stripes = map->sub_stripes; else if (rw & REQ_DISCARD) num_stripes = min_t(u64, map->sub_stripes * @@ -3895,9 +4268,11 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, stripe_index += mirror_num - 1; else { int old_stripe_index = stripe_index; - stripe_index = find_live_mirror(map, stripe_index, + stripe_index = find_live_mirror(fs_info, map, + stripe_index, map->sub_stripes, stripe_index + - current->pid % map->sub_stripes); + current->pid % map->sub_stripes, + dev_replace_is_ongoing); mirror_num = stripe_index - old_stripe_index + 1; } } else { @@ -3911,7 +4286,14 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, } BUG_ON(stripe_index >= map->num_stripes); - bbio = kzalloc(btrfs_bio_size(num_stripes), GFP_NOFS); + num_alloc_stripes = num_stripes; + if (dev_replace_is_ongoing) { + if (rw & (REQ_WRITE | REQ_DISCARD)) + num_alloc_stripes <<= 1; + if (rw & REQ_GET_READ_MIRRORS) + num_alloc_stripes++; + } + bbio = kzalloc(btrfs_bio_size(num_alloc_stripes), GFP_NOFS); if (!bbio) { ret = -ENOMEM; goto out; @@ -3998,7 +4380,7 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, } } - if (rw & REQ_WRITE) { + if (rw & (REQ_WRITE | REQ_GET_READ_MIRRORS)) { if (map->type & (BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10 | BTRFS_BLOCK_GROUP_DUP)) { @@ -4006,20 +4388,115 @@ static int __btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, } } + if (dev_replace_is_ongoing && (rw & (REQ_WRITE | REQ_DISCARD)) && + dev_replace->tgtdev != NULL) { + int index_where_to_add; + u64 srcdev_devid = dev_replace->srcdev->devid; + + /* + * duplicate the write operations while the dev replace + * procedure is running. Since the copying of the old disk + * to the new disk takes place at run time while the + * filesystem is mounted writable, the regular write + * operations to the old disk have to be duplicated to go + * to the new disk as well. + * Note that device->missing is handled by the caller, and + * that the write to the old disk is already set up in the + * stripes array. + */ + index_where_to_add = num_stripes; + for (i = 0; i < num_stripes; i++) { + if (bbio->stripes[i].dev->devid == srcdev_devid) { + /* write to new disk, too */ + struct btrfs_bio_stripe *new = + bbio->stripes + index_where_to_add; + struct btrfs_bio_stripe *old = + bbio->stripes + i; + + new->physical = old->physical; + new->length = old->length; + new->dev = dev_replace->tgtdev; + index_where_to_add++; + max_errors++; + } + } + num_stripes = index_where_to_add; + } else if (dev_replace_is_ongoing && (rw & REQ_GET_READ_MIRRORS) && + dev_replace->tgtdev != NULL) { + u64 srcdev_devid = dev_replace->srcdev->devid; + int index_srcdev = 0; + int found = 0; + u64 physical_of_found = 0; + + /* + * During the dev-replace procedure, the target drive can + * also be used to read data in case it is needed to repair + * a corrupt block elsewhere. This is possible if the + * requested area is left of the left cursor. In this area, + * the target drive is a full copy of the source drive. + */ + for (i = 0; i < num_stripes; i++) { + if (bbio->stripes[i].dev->devid == srcdev_devid) { + /* + * In case of DUP, in order to keep it + * simple, only add the mirror with the + * lowest physical address + */ + if (found && + physical_of_found <= + bbio->stripes[i].physical) + continue; + index_srcdev = i; + found = 1; + physical_of_found = bbio->stripes[i].physical; + } + } + if (found) { + u64 length = map->stripe_len; + + if (physical_of_found + length <= + dev_replace->cursor_left) { + struct btrfs_bio_stripe *tgtdev_stripe = + bbio->stripes + num_stripes; + + tgtdev_stripe->physical = physical_of_found; + tgtdev_stripe->length = + bbio->stripes[index_srcdev].length; + tgtdev_stripe->dev = dev_replace->tgtdev; + + num_stripes++; + } + } + } + *bbio_ret = bbio; bbio->num_stripes = num_stripes; bbio->max_errors = max_errors; bbio->mirror_num = mirror_num; + + /* + * this is the case that REQ_READ && dev_replace_is_ongoing && + * mirror_num == num_stripes + 1 && dev_replace target drive is + * available as a mirror + */ + if (patch_the_first_stripe_for_dev_replace && num_stripes > 0) { + WARN_ON(num_stripes > 1); + bbio->stripes[0].dev = dev_replace->tgtdev; + bbio->stripes[0].physical = physical_to_patch_in_first_stripe; + bbio->mirror_num = map->num_stripes + 1; + } out: + if (dev_replace_is_ongoing) + btrfs_dev_replace_unlock(dev_replace); free_extent_map(em); return ret; } -int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, +int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, u64 logical, u64 *length, struct btrfs_bio **bbio_ret, int mirror_num) { - return __btrfs_map_block(map_tree, rw, logical, length, bbio_ret, + return __btrfs_map_block(fs_info, rw, logical, length, bbio_ret, mirror_num); } @@ -4238,10 +4715,116 @@ static noinline void schedule_bio(struct btrfs_root *root, &device->work); } +static int bio_size_ok(struct block_device *bdev, struct bio *bio, + sector_t sector) +{ + struct bio_vec *prev; + struct request_queue *q = bdev_get_queue(bdev); + unsigned short max_sectors = queue_max_sectors(q); + struct bvec_merge_data bvm = { + .bi_bdev = bdev, + .bi_sector = sector, + .bi_rw = bio->bi_rw, + }; + + if (bio->bi_vcnt == 0) { + WARN_ON(1); + return 1; + } + + prev = &bio->bi_io_vec[bio->bi_vcnt - 1]; + if ((bio->bi_size >> 9) > max_sectors) + return 0; + + if (!q->merge_bvec_fn) + return 1; + + bvm.bi_size = bio->bi_size - prev->bv_len; + if (q->merge_bvec_fn(q, &bvm, prev) < prev->bv_len) + return 0; + return 1; +} + +static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio, + struct bio *bio, u64 physical, int dev_nr, + int rw, int async) +{ + struct btrfs_device *dev = bbio->stripes[dev_nr].dev; + + bio->bi_private = bbio; + bio->bi_private = merge_stripe_index_into_bio_private( + bio->bi_private, (unsigned int)dev_nr); + bio->bi_end_io = btrfs_end_bio; + bio->bi_sector = physical >> 9; +#ifdef DEBUG + { + struct rcu_string *name; + + rcu_read_lock(); + name = rcu_dereference(dev->name); + pr_debug("btrfs_map_bio: rw %d, sector=%llu, dev=%lu " + "(%s id %llu), size=%u\n", rw, + (u64)bio->bi_sector, (u_long)dev->bdev->bd_dev, + name->str, dev->devid, bio->bi_size); + rcu_read_unlock(); + } +#endif + bio->bi_bdev = dev->bdev; + if (async) + schedule_bio(root, dev, rw, bio); + else + btrfsic_submit_bio(rw, bio); +} + +static int breakup_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio, + struct bio *first_bio, struct btrfs_device *dev, + int dev_nr, int rw, int async) +{ + struct bio_vec *bvec = first_bio->bi_io_vec; + struct bio *bio; + int nr_vecs = bio_get_nr_vecs(dev->bdev); + u64 physical = bbio->stripes[dev_nr].physical; + +again: + bio = btrfs_bio_alloc(dev->bdev, physical >> 9, nr_vecs, GFP_NOFS); + if (!bio) + return -ENOMEM; + + while (bvec <= (first_bio->bi_io_vec + first_bio->bi_vcnt - 1)) { + if (bio_add_page(bio, bvec->bv_page, bvec->bv_len, + bvec->bv_offset) < bvec->bv_len) { + u64 len = bio->bi_size; + + atomic_inc(&bbio->stripes_pending); + submit_stripe_bio(root, bbio, bio, physical, dev_nr, + rw, async); + physical += len; + goto again; + } + bvec++; + } + + submit_stripe_bio(root, bbio, bio, physical, dev_nr, rw, async); + return 0; +} + +static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical) +{ + atomic_inc(&bbio->error); + if (atomic_dec_and_test(&bbio->stripes_pending)) { + bio->bi_private = bbio->private; + bio->bi_end_io = bbio->end_io; + bio->bi_bdev = (struct block_device *) + (unsigned long)bbio->mirror_num; + bio->bi_sector = logical >> 9; + kfree(bbio); + bio_endio(bio, -EIO); + } +} + int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, int mirror_num, int async_submit) { - struct btrfs_mapping_tree *map_tree; struct btrfs_device *dev; struct bio *first_bio = bio; u64 logical = (u64)bio->bi_sector << 9; @@ -4253,12 +4836,11 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, struct btrfs_bio *bbio = NULL; length = bio->bi_size; - map_tree = &root->fs_info->mapping_tree; map_length = length; - ret = btrfs_map_block(map_tree, rw, logical, &map_length, &bbio, + ret = btrfs_map_block(root->fs_info, rw, logical, &map_length, &bbio, mirror_num); - if (ret) /* -ENOMEM */ + if (ret) return ret; total_devs = bbio->num_stripes; @@ -4276,52 +4858,48 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, atomic_set(&bbio->stripes_pending, bbio->num_stripes); while (dev_nr < total_devs) { + dev = bbio->stripes[dev_nr].dev; + if (!dev || !dev->bdev || (rw & WRITE && !dev->writeable)) { + bbio_error(bbio, first_bio, logical); + dev_nr++; + continue; + } + + /* + * Check and see if we're ok with this bio based on it's size + * and offset with the given device. + */ + if (!bio_size_ok(dev->bdev, first_bio, + bbio->stripes[dev_nr].physical >> 9)) { + ret = breakup_stripe_bio(root, bbio, first_bio, dev, + dev_nr, rw, async_submit); + BUG_ON(ret); + dev_nr++; + continue; + } + if (dev_nr < total_devs - 1) { bio = bio_clone(first_bio, GFP_NOFS); BUG_ON(!bio); /* -ENOMEM */ } else { bio = first_bio; } - bio->bi_private = bbio; - bio->bi_private = merge_stripe_index_into_bio_private( - bio->bi_private, (unsigned int)dev_nr); - bio->bi_end_io = btrfs_end_bio; - bio->bi_sector = bbio->stripes[dev_nr].physical >> 9; - dev = bbio->stripes[dev_nr].dev; - if (dev && dev->bdev && (rw != WRITE || dev->writeable)) { -#ifdef DEBUG - struct rcu_string *name; - - rcu_read_lock(); - name = rcu_dereference(dev->name); - pr_debug("btrfs_map_bio: rw %d, sector=%llu, dev=%lu " - "(%s id %llu), size=%u\n", rw, - (u64)bio->bi_sector, (u_long)dev->bdev->bd_dev, - name->str, dev->devid, bio->bi_size); - rcu_read_unlock(); -#endif - bio->bi_bdev = dev->bdev; - if (async_submit) - schedule_bio(root, dev, rw, bio); - else - btrfsic_submit_bio(rw, bio); - } else { - bio->bi_bdev = root->fs_info->fs_devices->latest_bdev; - bio->bi_sector = logical >> 9; - bio_endio(bio, -EIO); - } + + submit_stripe_bio(root, bbio, bio, + bbio->stripes[dev_nr].physical, dev_nr, rw, + async_submit); dev_nr++; } return 0; } -struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid, +struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, u8 *uuid, u8 *fsid) { struct btrfs_device *device; struct btrfs_fs_devices *cur_devices; - cur_devices = root->fs_info->fs_devices; + cur_devices = fs_info->fs_devices; while (cur_devices) { if (!fsid || !memcmp(cur_devices->fsid, fsid, BTRFS_UUID_SIZE)) { @@ -4402,6 +4980,7 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key, em->bdev = (struct block_device *)map; em->start = logical; em->len = length; + em->orig_start = 0; em->block_start = 0; em->block_len = em->len; @@ -4419,8 +4998,8 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key, read_extent_buffer(leaf, uuid, (unsigned long) btrfs_stripe_dev_uuid_nr(chunk, i), BTRFS_UUID_SIZE); - map->stripes[i].dev = btrfs_find_device(root, devid, uuid, - NULL); + map->stripes[i].dev = btrfs_find_device(root->fs_info, devid, + uuid, NULL); if (!map->stripes[i].dev && !btrfs_test_opt(root, DEGRADED)) { kfree(map); free_extent_map(em); @@ -4461,6 +5040,8 @@ static void fill_device_from_item(struct extent_buffer *leaf, device->io_align = btrfs_device_io_align(leaf, dev_item); device->io_width = btrfs_device_io_width(leaf, dev_item); device->sector_size = btrfs_device_sector_size(leaf, dev_item); + WARN_ON(device->devid == BTRFS_DEV_REPLACE_DEVID); + device->is_tgtdev_for_dev_replace = 0; ptr = (unsigned long)btrfs_device_uuid(dev_item); read_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE); @@ -4538,7 +5119,7 @@ static int read_one_dev(struct btrfs_root *root, return ret; } - device = btrfs_find_device(root, devid, dev_uuid, fs_uuid); + device = btrfs_find_device(root->fs_info, devid, dev_uuid, fs_uuid); if (!device || !device->bdev) { if (!btrfs_test_opt(root, DEGRADED)) return -EIO; @@ -4571,7 +5152,7 @@ static int read_one_dev(struct btrfs_root *root, fill_device_from_item(leaf, dev_item, device); device->dev_root = root->fs_info->dev_root; device->in_fs_metadata = 1; - if (device->writeable) { + if (device->writeable && !device->is_tgtdev_for_dev_replace) { device->fs_devices->total_rw_bytes += device->total_bytes; spin_lock(&root->fs_info->free_chunk_lock); root->fs_info->free_chunk_space += device->total_bytes - @@ -4930,7 +5511,7 @@ int btrfs_get_dev_stats(struct btrfs_root *root, int i; mutex_lock(&fs_devices->device_list_mutex); - dev = btrfs_find_device(root, stats->devid, NULL, NULL); + dev = btrfs_find_device(root->fs_info, stats->devid, NULL, NULL); mutex_unlock(&fs_devices->device_list_mutex); if (!dev) { @@ -4958,3 +5539,21 @@ int btrfs_get_dev_stats(struct btrfs_root *root, stats->nr_items = BTRFS_DEV_STAT_VALUES_MAX; return 0; } + +int btrfs_scratch_superblock(struct btrfs_device *device) +{ + struct buffer_head *bh; + struct btrfs_super_block *disk_super; + + bh = btrfs_read_dev_super(device->bdev); + if (!bh) + return -EINVAL; + disk_super = (struct btrfs_super_block *)bh->b_data; + + memset(&disk_super->magic, 0, sizeof(disk_super->magic)); + set_buffer_dirty(bh); + sync_dirty_buffer(bh); + brelse(bh); + + return 0; +} diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 53c06af92e8..d3c3939ac75 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -50,6 +50,7 @@ struct btrfs_device { int in_fs_metadata; int missing; int can_discard; + int is_tgtdev_for_dev_replace; spinlock_t io_lock; @@ -88,7 +89,7 @@ struct btrfs_device { u8 uuid[BTRFS_UUID_SIZE]; /* per-device scrub information */ - struct scrub_dev *scrub_device; + struct scrub_ctx *scrub_device; struct btrfs_work work; struct rcu_head rcu; @@ -179,6 +180,15 @@ struct btrfs_device_info { u64 total_avail; }; +struct btrfs_raid_attr { + int sub_stripes; /* sub_stripes info for map */ + int dev_stripes; /* stripes per dev */ + int devs_max; /* max devs to use */ + int devs_min; /* min devs needed */ + int devs_increment; /* ndevs has to be a multiple of this */ + int ncopies; /* how many copies to data has */ +}; + struct map_lookup { u64 type; int io_align; @@ -248,7 +258,7 @@ int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans, struct btrfs_device *device, u64 chunk_tree, u64 chunk_objectid, u64 chunk_offset, u64 start, u64 num_bytes); -int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw, +int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, u64 logical, u64 *length, struct btrfs_bio **bbio_ret, int mirror_num); int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, @@ -267,19 +277,27 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, struct btrfs_fs_devices **fs_devices_ret); int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); -void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices); +void btrfs_close_extra_devices(struct btrfs_fs_info *fs_info, + struct btrfs_fs_devices *fs_devices, int step); +int btrfs_find_device_missing_or_by_path(struct btrfs_root *root, + char *device_path, + struct btrfs_device **device); +int btrfs_find_device_by_path(struct btrfs_root *root, char *device_path, + struct btrfs_device **device); int btrfs_add_device(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_device *device); int btrfs_rm_device(struct btrfs_root *root, char *device_path); void btrfs_cleanup_fs_uuids(void); -int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len); +int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); int btrfs_grow_device(struct btrfs_trans_handle *trans, struct btrfs_device *device, u64 new_size); -struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid, +struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, u8 *uuid, u8 *fsid); int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); int btrfs_init_new_device(struct btrfs_root *root, char *path); +int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path, + struct btrfs_device **device_out); int btrfs_balance(struct btrfs_balance_control *bctl, struct btrfs_ioctl_balance_args *bargs); int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); @@ -296,6 +314,13 @@ int btrfs_get_dev_stats(struct btrfs_root *root, int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); +void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info, + struct btrfs_device *srcdev); +void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, + struct btrfs_device *tgtdev); +void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info, + struct btrfs_device *tgtdev); +int btrfs_scratch_superblock(struct btrfs_device *device); static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, int index) diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c index 3f4e2d69e83..446a6848c55 100644 --- a/fs/btrfs/xattr.c +++ b/fs/btrfs/xattr.c @@ -122,6 +122,16 @@ static int do_setxattr(struct btrfs_trans_handle *trans, */ if (!value) goto out; + } else { + di = btrfs_lookup_xattr(NULL, root, path, btrfs_ino(inode), + name, name_len, 0); + if (IS_ERR(di)) { + ret = PTR_ERR(di); + goto out; + } + if (!di && !value) + goto out; + btrfs_release_path(path); } again: @@ -198,6 +208,7 @@ int __btrfs_setxattr(struct btrfs_trans_handle *trans, inode_inc_iversion(inode); inode->i_ctime = CURRENT_TIME; + set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags); ret = btrfs_update_inode(trans, root, inode); BUG_ON(ret); out: @@ -265,7 +276,7 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size) di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item); if (verify_dir_item(root, leaf, di)) - continue; + goto next; name_len = btrfs_dir_name_len(leaf, di); total_size += name_len + 1; diff --git a/fs/buffer.c b/fs/buffer.c index b5f044283ed..7a75c3e0fd5 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -46,8 +46,7 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list); #define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers) -inline void -init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private) +void init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private) { bh->b_end_io = handler; bh->b_private = private; @@ -555,7 +554,7 @@ void emergency_thaw_all(void) */ int sync_mapping_buffers(struct address_space *mapping) { - struct address_space *buffer_mapping = mapping->assoc_mapping; + struct address_space *buffer_mapping = mapping->private_data; if (buffer_mapping == NULL || list_empty(&mapping->private_list)) return 0; @@ -588,10 +587,10 @@ void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode) struct address_space *buffer_mapping = bh->b_page->mapping; mark_buffer_dirty(bh); - if (!mapping->assoc_mapping) { - mapping->assoc_mapping = buffer_mapping; + if (!mapping->private_data) { + mapping->private_data = buffer_mapping; } else { - BUG_ON(mapping->assoc_mapping != buffer_mapping); + BUG_ON(mapping->private_data != buffer_mapping); } if (!bh->b_assoc_map) { spin_lock(&buffer_mapping->private_lock); @@ -788,7 +787,7 @@ void invalidate_inode_buffers(struct inode *inode) if (inode_has_buffers(inode)) { struct address_space *mapping = &inode->i_data; struct list_head *list = &mapping->private_list; - struct address_space *buffer_mapping = mapping->assoc_mapping; + struct address_space *buffer_mapping = mapping->private_data; spin_lock(&buffer_mapping->private_lock); while (!list_empty(list)) @@ -811,7 +810,7 @@ int remove_inode_buffers(struct inode *inode) if (inode_has_buffers(inode)) { struct address_space *mapping = &inode->i_data; struct list_head *list = &mapping->private_list; - struct address_space *buffer_mapping = mapping->assoc_mapping; + struct address_space *buffer_mapping = mapping->private_data; spin_lock(&buffer_mapping->private_lock); while (!list_empty(list)) { @@ -850,13 +849,10 @@ try_again: if (!bh) goto no_grow; - bh->b_bdev = NULL; bh->b_this_page = head; bh->b_blocknr = -1; head = bh; - bh->b_state = 0; - atomic_set(&bh->b_count, 0); bh->b_size = size; /* Link the buffer to its page */ @@ -911,6 +907,18 @@ link_dev_buffers(struct page *page, struct buffer_head *head) attach_page_buffers(page, head); } +static sector_t blkdev_max_block(struct block_device *bdev, unsigned int size) +{ + sector_t retval = ~((sector_t)0); + loff_t sz = i_size_read(bdev->bd_inode); + + if (sz) { + unsigned int sizebits = blksize_bits(size); + retval = (sz >> sizebits); + } + return retval; +} + /* * Initialise the state of a blockdev page's buffers. */ @@ -921,7 +929,7 @@ init_page_buffers(struct page *page, struct block_device *bdev, struct buffer_head *head = page_buffers(page); struct buffer_head *bh = head; int uptodate = PageUptodate(page); - sector_t end_block = blkdev_max_block(I_BDEV(bdev->bd_inode)); + sector_t end_block = blkdev_max_block(I_BDEV(bdev->bd_inode), size); do { if (!buffer_mapped(bh)) { @@ -1553,6 +1561,28 @@ void unmap_underlying_metadata(struct block_device *bdev, sector_t block) EXPORT_SYMBOL(unmap_underlying_metadata); /* + * Size is a power-of-two in the range 512..PAGE_SIZE, + * and the case we care about most is PAGE_SIZE. + * + * So this *could* possibly be written with those + * constraints in mind (relevant mostly if some + * architecture has a slow bit-scan instruction) + */ +static inline int block_size_bits(unsigned int blocksize) +{ + return ilog2(blocksize); +} + +static struct buffer_head *create_page_buffers(struct page *page, struct inode *inode, unsigned int b_state) +{ + BUG_ON(!PageLocked(page)); + + if (!page_has_buffers(page)) + create_empty_buffers(page, 1 << ACCESS_ONCE(inode->i_blkbits), b_state); + return page_buffers(page); +} + +/* * NOTE! All mapped/uptodate combinations are valid: * * Mapped Uptodate Meaning @@ -1589,19 +1619,13 @@ static int __block_write_full_page(struct inode *inode, struct page *page, sector_t block; sector_t last_block; struct buffer_head *bh, *head; - const unsigned blocksize = 1 << inode->i_blkbits; + unsigned int blocksize, bbits; int nr_underway = 0; int write_op = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE); - BUG_ON(!PageLocked(page)); - - last_block = (i_size_read(inode) - 1) >> inode->i_blkbits; - - if (!page_has_buffers(page)) { - create_empty_buffers(page, blocksize, + head = create_page_buffers(page, inode, (1 << BH_Dirty)|(1 << BH_Uptodate)); - } /* * Be very careful. We have no exclusion from __set_page_dirty_buffers @@ -1613,9 +1637,12 @@ static int __block_write_full_page(struct inode *inode, struct page *page, * handle that here by just cleaning them. */ - block = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); - head = page_buffers(page); bh = head; + blocksize = bh->b_size; + bbits = block_size_bits(blocksize); + + block = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits); + last_block = (i_size_read(inode) - 1) >> bbits; /* * Get all the dirty buffers mapped to disk addresses and @@ -1806,12 +1833,10 @@ int __block_write_begin(struct page *page, loff_t pos, unsigned len, BUG_ON(to > PAGE_CACHE_SIZE); BUG_ON(from > to); - blocksize = 1 << inode->i_blkbits; - if (!page_has_buffers(page)) - create_empty_buffers(page, blocksize, 0); - head = page_buffers(page); + head = create_page_buffers(page, inode, 0); + blocksize = head->b_size; + bbits = block_size_bits(blocksize); - bbits = inode->i_blkbits; block = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits); for(bh = head, block_start = 0; bh != head || !block_start; @@ -1881,11 +1906,11 @@ static int __block_commit_write(struct inode *inode, struct page *page, unsigned blocksize; struct buffer_head *bh, *head; - blocksize = 1 << inode->i_blkbits; + bh = head = page_buffers(page); + blocksize = bh->b_size; - for(bh = head = page_buffers(page), block_start = 0; - bh != head || !block_start; - block_start=block_end, bh = bh->b_this_page) { + block_start = 0; + do { block_end = block_start + blocksize; if (block_end <= from || block_start >= to) { if (!buffer_uptodate(bh)) @@ -1895,7 +1920,10 @@ static int __block_commit_write(struct inode *inode, struct page *page, mark_buffer_dirty(bh); } clear_buffer_new(bh); - } + + block_start = block_end; + bh = bh->b_this_page; + } while (bh != head); /* * If this is a partial write which happened to make all buffers @@ -2020,7 +2048,6 @@ EXPORT_SYMBOL(generic_write_end); int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc, unsigned long from) { - struct inode *inode = page->mapping->host; unsigned block_start, block_end, blocksize; unsigned to; struct buffer_head *bh, *head; @@ -2029,13 +2056,13 @@ int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc, if (!page_has_buffers(page)) return 0; - blocksize = 1 << inode->i_blkbits; + head = page_buffers(page); + blocksize = head->b_size; to = min_t(unsigned, PAGE_CACHE_SIZE - from, desc->count); to = from + to; if (from < blocksize && to > PAGE_CACHE_SIZE - blocksize) return 0; - head = page_buffers(page); bh = head; block_start = 0; do { @@ -2068,18 +2095,16 @@ int block_read_full_page(struct page *page, get_block_t *get_block) struct inode *inode = page->mapping->host; sector_t iblock, lblock; struct buffer_head *bh, *head, *arr[MAX_BUF_PER_PAGE]; - unsigned int blocksize; + unsigned int blocksize, bbits; int nr, i; int fully_mapped = 1; - BUG_ON(!PageLocked(page)); - blocksize = 1 << inode->i_blkbits; - if (!page_has_buffers(page)) - create_empty_buffers(page, blocksize, 0); - head = page_buffers(page); + head = create_page_buffers(page, inode, 0); + blocksize = head->b_size; + bbits = block_size_bits(blocksize); - iblock = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); - lblock = (i_size_read(inode)+blocksize-1) >> inode->i_blkbits; + iblock = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits); + lblock = (i_size_read(inode)+blocksize-1) >> bbits; bh = head; nr = 0; i = 0; @@ -2864,6 +2889,56 @@ static void end_bio_bh_io_sync(struct bio *bio, int err) bio_put(bio); } +/* + * This allows us to do IO even on the odd last sectors + * of a device, even if the bh block size is some multiple + * of the physical sector size. + * + * We'll just truncate the bio to the size of the device, + * and clear the end of the buffer head manually. + * + * Truly out-of-range accesses will turn into actual IO + * errors, this only handles the "we need to be able to + * do IO at the final sector" case. + */ +static void guard_bh_eod(int rw, struct bio *bio, struct buffer_head *bh) +{ + sector_t maxsector; + unsigned bytes; + + maxsector = i_size_read(bio->bi_bdev->bd_inode) >> 9; + if (!maxsector) + return; + + /* + * If the *whole* IO is past the end of the device, + * let it through, and the IO layer will turn it into + * an EIO. + */ + if (unlikely(bio->bi_sector >= maxsector)) + return; + + maxsector -= bio->bi_sector; + bytes = bio->bi_size; + if (likely((bytes >> 9) <= maxsector)) + return; + + /* Uhhuh. We've got a bh that straddles the device size! */ + bytes = maxsector << 9; + + /* Truncate the bio.. */ + bio->bi_size = bytes; + bio->bi_io_vec[0].bv_len = bytes; + + /* ..and clear the end of the buffer for reads */ + if ((rw & RW_MASK) == READ) { + void *kaddr = kmap_atomic(bh->b_page); + memset(kaddr + bh_offset(bh) + bytes, 0, bh->b_size - bytes); + kunmap_atomic(kaddr); + flush_dcache_page(bh->b_page); + } +} + int submit_bh(int rw, struct buffer_head * bh) { struct bio *bio; @@ -2900,6 +2975,9 @@ int submit_bh(int rw, struct buffer_head * bh) bio->bi_end_io = end_bio_bh_io_sync; bio->bi_private = bh; + /* Take care of bh's that straddle the end of the device */ + guard_bh_eod(rw, bio, bh); + bio_get(bio); submit_bio(rw, bio); diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c index 67bef6d0148..746ce532e13 100644 --- a/fs/cachefiles/interface.c +++ b/fs/cachefiles/interface.c @@ -41,12 +41,12 @@ static struct fscache_object *cachefiles_alloc_object( _enter("{%s},%p,", cache->cache.identifier, cookie); - lookup_data = kmalloc(sizeof(*lookup_data), GFP_KERNEL); + lookup_data = kmalloc(sizeof(*lookup_data), cachefiles_gfp); if (!lookup_data) goto nomem_lookup_data; /* create a new object record and a temporary leaf image */ - object = kmem_cache_alloc(cachefiles_object_jar, GFP_KERNEL); + object = kmem_cache_alloc(cachefiles_object_jar, cachefiles_gfp); if (!object) goto nomem_object; @@ -63,7 +63,7 @@ static struct fscache_object *cachefiles_alloc_object( * - stick the length on the front and leave space on the back for the * encoder */ - buffer = kmalloc((2 + 512) + 3, GFP_KERNEL); + buffer = kmalloc((2 + 512) + 3, cachefiles_gfp); if (!buffer) goto nomem_buffer; @@ -219,7 +219,7 @@ static void cachefiles_update_object(struct fscache_object *_object) return; } - auxdata = kmalloc(2 + 512 + 3, GFP_KERNEL); + auxdata = kmalloc(2 + 512 + 3, cachefiles_gfp); if (!auxdata) { _leave(" [nomem]"); return; @@ -441,6 +441,54 @@ truncate_failed: } /* + * Invalidate an object + */ +static void cachefiles_invalidate_object(struct fscache_operation *op) +{ + struct cachefiles_object *object; + struct cachefiles_cache *cache; + const struct cred *saved_cred; + struct path path; + uint64_t ni_size; + int ret; + + object = container_of(op->object, struct cachefiles_object, fscache); + cache = container_of(object->fscache.cache, + struct cachefiles_cache, cache); + + op->object->cookie->def->get_attr(op->object->cookie->netfs_data, + &ni_size); + + _enter("{OBJ%x},[%llu]", + op->object->debug_id, (unsigned long long)ni_size); + + if (object->backer) { + ASSERT(S_ISREG(object->backer->d_inode->i_mode)); + + fscache_set_store_limit(&object->fscache, ni_size); + + path.dentry = object->backer; + path.mnt = cache->mnt; + + cachefiles_begin_secure(cache, &saved_cred); + ret = vfs_truncate(&path, 0); + if (ret == 0) + ret = vfs_truncate(&path, ni_size); + cachefiles_end_secure(cache, saved_cred); + + if (ret != 0) { + fscache_set_store_limit(&object->fscache, 0); + if (ret == -EIO) + cachefiles_io_error_obj(object, + "Invalidate failed"); + } + } + + fscache_op_complete(op, true); + _leave(""); +} + +/* * dissociate a cache from all the pages it was backing */ static void cachefiles_dissociate_pages(struct fscache_cache *cache) @@ -455,6 +503,7 @@ const struct fscache_cache_ops cachefiles_cache_ops = { .lookup_complete = cachefiles_lookup_complete, .grab_object = cachefiles_grab_object, .update_object = cachefiles_update_object, + .invalidate_object = cachefiles_invalidate_object, .drop_object = cachefiles_drop_object, .put_object = cachefiles_put_object, .sync_cache = cachefiles_sync_cache, diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h index bd6bc1bde2d..49382519907 100644 --- a/fs/cachefiles/internal.h +++ b/fs/cachefiles/internal.h @@ -23,6 +23,8 @@ extern unsigned cachefiles_debug; #define CACHEFILES_DEBUG_KLEAVE 2 #define CACHEFILES_DEBUG_KDEBUG 4 +#define cachefiles_gfp (__GFP_WAIT | __GFP_NORETRY | __GFP_NOMEMALLOC) + /* * node records */ diff --git a/fs/cachefiles/key.c b/fs/cachefiles/key.c index 81b8b2b3a67..33b58c60f2d 100644 --- a/fs/cachefiles/key.c +++ b/fs/cachefiles/key.c @@ -78,7 +78,7 @@ char *cachefiles_cook_key(const u8 *raw, int keylen, uint8_t type) _debug("max: %d", max); - key = kmalloc(max, GFP_KERNEL); + key = kmalloc(max, cachefiles_gfp); if (!key) return NULL; diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index b0b5f7cdfff..8c01c5fcdf7 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -40,8 +40,7 @@ void __cachefiles_printk_object(struct cachefiles_object *object, printk(KERN_ERR "%sobjstate=%s fl=%lx wbusy=%x ev=%lx[%lx]\n", prefix, fscache_object_states[object->fscache.state], object->fscache.flags, work_busy(&object->fscache.work), - object->fscache.events, - object->fscache.event_mask & FSCACHE_OBJECT_EVENTS_MASK); + object->fscache.events, object->fscache.event_mask); printk(KERN_ERR "%sops=%u inp=%u exc=%u\n", prefix, object->fscache.n_ops, object->fscache.n_in_progress, object->fscache.n_exclusive); diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c index c994691d944..48099225970 100644 --- a/fs/cachefiles/rdwr.c +++ b/fs/cachefiles/rdwr.c @@ -77,25 +77,25 @@ static int cachefiles_read_reissue(struct cachefiles_object *object, struct page *backpage = monitor->back_page, *backpage2; int ret; - kenter("{ino=%lx},{%lx,%lx}", + _enter("{ino=%lx},{%lx,%lx}", object->backer->d_inode->i_ino, backpage->index, backpage->flags); /* skip if the page was truncated away completely */ if (backpage->mapping != bmapping) { - kleave(" = -ENODATA [mapping]"); + _leave(" = -ENODATA [mapping]"); return -ENODATA; } backpage2 = find_get_page(bmapping, backpage->index); if (!backpage2) { - kleave(" = -ENODATA [gone]"); + _leave(" = -ENODATA [gone]"); return -ENODATA; } if (backpage != backpage2) { put_page(backpage2); - kleave(" = -ENODATA [different]"); + _leave(" = -ENODATA [different]"); return -ENODATA; } @@ -114,7 +114,7 @@ static int cachefiles_read_reissue(struct cachefiles_object *object, if (PageUptodate(backpage)) goto unlock_discard; - kdebug("reissue read"); + _debug("reissue read"); ret = bmapping->a_ops->readpage(NULL, backpage); if (ret < 0) goto unlock_discard; @@ -129,7 +129,7 @@ static int cachefiles_read_reissue(struct cachefiles_object *object, } /* it'll reappear on the todo list */ - kleave(" = -EINPROGRESS"); + _leave(" = -EINPROGRESS"); return -EINPROGRESS; unlock_discard: @@ -137,7 +137,7 @@ unlock_discard: spin_lock_irq(&object->work_lock); list_del(&monitor->op_link); spin_unlock_irq(&object->work_lock); - kleave(" = %d", ret); + _leave(" = %d", ret); return ret; } @@ -174,11 +174,13 @@ static void cachefiles_read_copier(struct fscache_operation *_op) _debug("- copy {%lu}", monitor->back_page->index); recheck: - if (PageUptodate(monitor->back_page)) { + if (test_bit(FSCACHE_COOKIE_INVALIDATING, + &object->fscache.cookie->flags)) { + error = -ESTALE; + } else if (PageUptodate(monitor->back_page)) { copy_highpage(monitor->netfs_page, monitor->back_page); - - pagevec_add(&pagevec, monitor->netfs_page); - fscache_mark_pages_cached(monitor->op, &pagevec); + fscache_mark_page_cached(monitor->op, + monitor->netfs_page); error = 0; } else if (!PageError(monitor->back_page)) { /* the page has probably been truncated */ @@ -198,6 +200,7 @@ static void cachefiles_read_copier(struct fscache_operation *_op) fscache_end_io(op, monitor->netfs_page, error); page_cache_release(monitor->netfs_page); + fscache_retrieval_complete(op, 1); fscache_put_retrieval(op); kfree(monitor); @@ -239,7 +242,7 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object, _debug("read back %p{%lu,%d}", netpage, netpage->index, page_count(netpage)); - monitor = kzalloc(sizeof(*monitor), GFP_KERNEL); + monitor = kzalloc(sizeof(*monitor), cachefiles_gfp); if (!monitor) goto nomem; @@ -258,13 +261,14 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object, goto backing_page_already_present; if (!newpage) { - newpage = page_cache_alloc_cold(bmapping); + newpage = __page_cache_alloc(cachefiles_gfp | + __GFP_COLD); if (!newpage) goto nomem_monitor; } ret = add_to_page_cache(newpage, bmapping, - netpage->index, GFP_KERNEL); + netpage->index, cachefiles_gfp); if (ret == 0) goto installed_new_backing_page; if (ret != -EEXIST) @@ -335,11 +339,11 @@ backing_page_already_present: backing_page_already_uptodate: _debug("- uptodate"); - pagevec_add(pagevec, netpage); - fscache_mark_pages_cached(op, pagevec); + fscache_mark_page_cached(op, netpage); copy_highpage(netpage, backpage); fscache_end_io(op, netpage, 0); + fscache_retrieval_complete(op, 1); success: _debug("success"); @@ -357,10 +361,13 @@ out: read_error: _debug("read error %d", ret); - if (ret == -ENOMEM) + if (ret == -ENOMEM) { + fscache_retrieval_complete(op, 1); goto out; + } io_error: cachefiles_io_error_obj(object, "Page read error on backing file"); + fscache_retrieval_complete(op, 1); ret = -ENOBUFS; goto out; @@ -370,6 +377,7 @@ nomem_monitor: fscache_put_retrieval(monitor->op); kfree(monitor); nomem: + fscache_retrieval_complete(op, 1); _leave(" = -ENOMEM"); return -ENOMEM; } @@ -408,7 +416,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op, _enter("{%p},{%lx},,,", object, page->index); if (!object->backer) - return -ENOBUFS; + goto enobufs; inode = object->backer->d_inode; ASSERT(S_ISREG(inode->i_mode)); @@ -417,7 +425,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op, /* calculate the shift required to use bmap */ if (inode->i_sb->s_blocksize > PAGE_SIZE) - return -ENOBUFS; + goto enobufs; shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits; @@ -448,15 +456,20 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op, &pagevec); } else if (cachefiles_has_space(cache, 0, 1) == 0) { /* there's space in the cache we can use */ - pagevec_add(&pagevec, page); - fscache_mark_pages_cached(op, &pagevec); + fscache_mark_page_cached(op, page); + fscache_retrieval_complete(op, 1); ret = -ENODATA; } else { - ret = -ENOBUFS; + goto enobufs; } _leave(" = %d", ret); return ret; + +enobufs: + fscache_retrieval_complete(op, 1); + _leave(" = -ENOBUFS"); + return -ENOBUFS; } /* @@ -465,8 +478,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op, */ static int cachefiles_read_backing_file(struct cachefiles_object *object, struct fscache_retrieval *op, - struct list_head *list, - struct pagevec *mark_pvec) + struct list_head *list) { struct cachefiles_one_read *monitor = NULL; struct address_space *bmapping = object->backer->d_inode->i_mapping; @@ -485,7 +497,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object, netpage, netpage->index, page_count(netpage)); if (!monitor) { - monitor = kzalloc(sizeof(*monitor), GFP_KERNEL); + monitor = kzalloc(sizeof(*monitor), cachefiles_gfp); if (!monitor) goto nomem; @@ -500,13 +512,14 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object, goto backing_page_already_present; if (!newpage) { - newpage = page_cache_alloc_cold(bmapping); + newpage = __page_cache_alloc(cachefiles_gfp | + __GFP_COLD); if (!newpage) goto nomem; } ret = add_to_page_cache(newpage, bmapping, - netpage->index, GFP_KERNEL); + netpage->index, cachefiles_gfp); if (ret == 0) goto installed_new_backing_page; if (ret != -EEXIST) @@ -536,10 +549,11 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object, _debug("- monitor add"); ret = add_to_page_cache(netpage, op->mapping, netpage->index, - GFP_KERNEL); + cachefiles_gfp); if (ret < 0) { if (ret == -EEXIST) { page_cache_release(netpage); + fscache_retrieval_complete(op, 1); continue; } goto nomem; @@ -612,10 +626,11 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object, _debug("- uptodate"); ret = add_to_page_cache(netpage, op->mapping, netpage->index, - GFP_KERNEL); + cachefiles_gfp); if (ret < 0) { if (ret == -EEXIST) { page_cache_release(netpage); + fscache_retrieval_complete(op, 1); continue; } goto nomem; @@ -626,16 +641,17 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object, page_cache_release(backpage); backpage = NULL; - if (!pagevec_add(mark_pvec, netpage)) - fscache_mark_pages_cached(op, mark_pvec); + fscache_mark_page_cached(op, netpage); page_cache_get(netpage); if (!pagevec_add(&lru_pvec, netpage)) __pagevec_lru_add_file(&lru_pvec); + /* the netpage is unlocked and marked up to date here */ fscache_end_io(op, netpage, 0); page_cache_release(netpage); netpage = NULL; + fscache_retrieval_complete(op, 1); continue; } @@ -661,6 +677,7 @@ out: list_for_each_entry_safe(netpage, _n, list, lru) { list_del(&netpage->lru); page_cache_release(netpage); + fscache_retrieval_complete(op, 1); } _leave(" = %d", ret); @@ -669,15 +686,17 @@ out: nomem: _debug("nomem"); ret = -ENOMEM; - goto out; + goto record_page_complete; read_error: _debug("read error %d", ret); if (ret == -ENOMEM) - goto out; + goto record_page_complete; io_error: cachefiles_io_error_obj(object, "Page read error on backing file"); ret = -ENOBUFS; +record_page_complete: + fscache_retrieval_complete(op, 1); goto out; } @@ -709,7 +728,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, *nr_pages); if (!object->backer) - return -ENOBUFS; + goto all_enobufs; space = 1; if (cachefiles_has_space(cache, 0, *nr_pages) < 0) @@ -722,7 +741,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, /* calculate the shift required to use bmap */ if (inode->i_sb->s_blocksize > PAGE_SIZE) - return -ENOBUFS; + goto all_enobufs; shift = PAGE_SHIFT - inode->i_sb->s_blocksize_bits; @@ -762,7 +781,10 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, nrbackpages++; } else if (space && pagevec_add(&pagevec, page) == 0) { fscache_mark_pages_cached(op, &pagevec); + fscache_retrieval_complete(op, 1); ret = -ENODATA; + } else { + fscache_retrieval_complete(op, 1); } } @@ -775,18 +797,18 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, /* submit the apparently valid pages to the backing fs to be read from * disk */ if (nrbackpages > 0) { - ret2 = cachefiles_read_backing_file(object, op, &backpages, - &pagevec); + ret2 = cachefiles_read_backing_file(object, op, &backpages); if (ret2 == -ENOMEM || ret2 == -EINTR) ret = ret2; } - if (pagevec_count(&pagevec) > 0) - fscache_mark_pages_cached(op, &pagevec); - _leave(" = %d [nr=%u%s]", ret, *nr_pages, list_empty(pages) ? " empty" : ""); return ret; + +all_enobufs: + fscache_retrieval_complete(op, *nr_pages); + return -ENOBUFS; } /* @@ -806,7 +828,6 @@ int cachefiles_allocate_page(struct fscache_retrieval *op, { struct cachefiles_object *object; struct cachefiles_cache *cache; - struct pagevec pagevec; int ret; object = container_of(op->op.object, @@ -817,14 +838,12 @@ int cachefiles_allocate_page(struct fscache_retrieval *op, _enter("%p,{%lx},", object, page->index); ret = cachefiles_has_space(cache, 0, 1); - if (ret == 0) { - pagevec_init(&pagevec, 0); - pagevec_add(&pagevec, page); - fscache_mark_pages_cached(op, &pagevec); - } else { + if (ret == 0) + fscache_mark_page_cached(op, page); + else ret = -ENOBUFS; - } + fscache_retrieval_complete(op, 1); _leave(" = %d", ret); return ret; } @@ -874,6 +893,7 @@ int cachefiles_allocate_pages(struct fscache_retrieval *op, ret = -ENOBUFS; } + fscache_retrieval_complete(op, *nr_pages); _leave(" = %d", ret); return ret; } diff --git a/fs/cachefiles/xattr.c b/fs/cachefiles/xattr.c index e18b183b47e..73b46288b54 100644 --- a/fs/cachefiles/xattr.c +++ b/fs/cachefiles/xattr.c @@ -174,7 +174,7 @@ int cachefiles_check_object_xattr(struct cachefiles_object *object, ASSERT(dentry); ASSERT(dentry->d_inode); - auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, GFP_KERNEL); + auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, cachefiles_gfp); if (!auxbuf) { _leave(" = -ENOMEM"); return -ENOMEM; diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 6690269f5dd..064d1a68d2c 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -267,6 +267,14 @@ static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg) kfree(req->r_pages); } +static void ceph_unlock_page_vector(struct page **pages, int num_pages) +{ + int i; + + for (i = 0; i < num_pages; i++) + unlock_page(pages[i]); +} + /* * start an async read(ahead) operation. return nr_pages we submitted * a read for on success, or negative error code. @@ -347,6 +355,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max) return nr_pages; out_pages: + ceph_unlock_page_vector(pages, nr_pages); ceph_release_page_vector(pages, nr_pages); out: ceph_osdc_put_request(req); @@ -1078,23 +1087,51 @@ static int ceph_write_begin(struct file *file, struct address_space *mapping, struct page **pagep, void **fsdata) { struct inode *inode = file->f_dentry->d_inode; + struct ceph_inode_info *ci = ceph_inode(inode); + struct ceph_file_info *fi = file->private_data; struct page *page; pgoff_t index = pos >> PAGE_CACHE_SHIFT; - int r; + int r, want, got = 0; + + if (fi->fmode & CEPH_FILE_MODE_LAZY) + want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; + else + want = CEPH_CAP_FILE_BUFFER; + + dout("write_begin %p %llx.%llx %llu~%u getting caps. i_size %llu\n", + inode, ceph_vinop(inode), pos, len, inode->i_size); + r = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, pos+len); + if (r < 0) + return r; + dout("write_begin %p %llx.%llx %llu~%u got cap refs on %s\n", + inode, ceph_vinop(inode), pos, len, ceph_cap_string(got)); + if (!(got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO))) { + ceph_put_cap_refs(ci, got); + return -EAGAIN; + } do { /* get a page */ page = grab_cache_page_write_begin(mapping, index, 0); - if (!page) - return -ENOMEM; - *pagep = page; + if (!page) { + r = -ENOMEM; + break; + } dout("write_begin file %p inode %p page %p %d~%d\n", file, inode, page, (int)pos, (int)len); r = ceph_update_writeable_page(file, pos, len, page); + if (r) + page_cache_release(page); } while (r == -EAGAIN); + if (r) { + ceph_put_cap_refs(ci, got); + } else { + *pagep = page; + *(int *)fsdata = got; + } return r; } @@ -1108,10 +1145,12 @@ static int ceph_write_end(struct file *file, struct address_space *mapping, struct page *page, void *fsdata) { struct inode *inode = file->f_dentry->d_inode; + struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_client(inode); struct ceph_mds_client *mdsc = fsc->mdsc; unsigned from = pos & (PAGE_CACHE_SIZE - 1); int check_cap = 0; + int got = (unsigned long)fsdata; dout("write_end file %p inode %p page %p %d~%d (%d)\n", file, inode, page, (int)pos, (int)copied, (int)len); @@ -1134,6 +1173,19 @@ static int ceph_write_end(struct file *file, struct address_space *mapping, up_read(&mdsc->snap_rwsem); page_cache_release(page); + if (copied > 0) { + int dirty; + spin_lock(&ci->i_ceph_lock); + dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR); + spin_unlock(&ci->i_ceph_lock); + if (dirty) + __mark_inode_dirty(inode, dirty); + } + + dout("write_end %p %llx.%llx %llu~%u dropping cap refs on %s\n", + inode, ceph_vinop(inode), pos, len, ceph_cap_string(got)); + ceph_put_cap_refs(ci, got); + if (check_cap) ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY, NULL); diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 3251e9cc640..a1d9bb30c1b 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -236,8 +236,10 @@ static struct ceph_cap *get_cap(struct ceph_mds_client *mdsc, if (!ctx) { cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); if (cap) { + spin_lock(&mdsc->caps_list_lock); mdsc->caps_use_count++; mdsc->caps_total_count++; + spin_unlock(&mdsc->caps_list_lock); } return cap; } @@ -1349,11 +1351,15 @@ int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask) if (!ci->i_head_snapc) ci->i_head_snapc = ceph_get_snap_context( ci->i_snap_realm->cached_context); - dout(" inode %p now dirty snapc %p\n", &ci->vfs_inode, - ci->i_head_snapc); + dout(" inode %p now dirty snapc %p auth cap %p\n", + &ci->vfs_inode, ci->i_head_snapc, ci->i_auth_cap); BUG_ON(!list_empty(&ci->i_dirty_item)); spin_lock(&mdsc->cap_dirty_lock); - list_add(&ci->i_dirty_item, &mdsc->cap_dirty); + if (ci->i_auth_cap) + list_add(&ci->i_dirty_item, &mdsc->cap_dirty); + else + list_add(&ci->i_dirty_item, + &mdsc->cap_dirty_migrating); spin_unlock(&mdsc->cap_dirty_lock); if (ci->i_flushing_caps == 0) { ihold(inode); @@ -2388,7 +2394,7 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, &atime); /* max size increase? */ - if (max_size != ci->i_max_size) { + if (ci->i_auth_cap == cap && max_size != ci->i_max_size) { dout("max_size %lld -> %llu\n", ci->i_max_size, max_size); ci->i_max_size = max_size; if (max_size >= ci->i_wanted_max_size) { @@ -2745,6 +2751,7 @@ static void handle_cap_import(struct ceph_mds_client *mdsc, /* make sure we re-request max_size, if necessary */ spin_lock(&ci->i_ceph_lock); + ci->i_wanted_max_size = 0; /* reset */ ci->i_requested_max_size = 0; spin_unlock(&ci->i_ceph_lock); } @@ -2840,8 +2847,6 @@ void ceph_handle_caps(struct ceph_mds_session *session, case CEPH_CAP_OP_IMPORT: handle_cap_import(mdsc, inode, h, session, snaptrace, snaptrace_len); - ceph_check_caps(ceph_inode(inode), 0, session); - goto done_unlocked; } /* the rest require a cap */ @@ -2858,6 +2863,7 @@ void ceph_handle_caps(struct ceph_mds_session *session, switch (op) { case CEPH_CAP_OP_REVOKE: case CEPH_CAP_OP_GRANT: + case CEPH_CAP_OP_IMPORT: handle_cap_grant(inode, h, session, cap, msg->middle); goto done_unlocked; diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index e5b77319c97..8c1aabe93b6 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -454,7 +454,7 @@ static void reset_readdir(struct ceph_file_info *fi) fi->flags &= ~CEPH_F_ATEND; } -static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int origin) +static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) { struct ceph_file_info *fi = file->private_data; struct inode *inode = file->f_mapping->host; @@ -463,7 +463,7 @@ static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int origin) mutex_lock(&inode->i_mutex); retval = -EINVAL; - switch (origin) { + switch (whence) { case SEEK_END: offset += inode->i_size + 2; /* FIXME */ break; diff --git a/fs/ceph/export.c b/fs/ceph/export.c index 02ce90972d8..ca3ab3f9ca7 100644 --- a/fs/ceph/export.c +++ b/fs/ceph/export.c @@ -56,13 +56,15 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len, struct ceph_nfs_confh *cfh = (void *)rawfh; int connected_handle_length = sizeof(*cfh)/4; int handle_length = sizeof(*fh)/4; - struct dentry *dentry = d_find_alias(inode); + struct dentry *dentry; struct dentry *parent; /* don't re-export snaps */ if (ceph_snap(inode) != CEPH_NOSNAP) return -EINVAL; + dentry = d_find_alias(inode); + /* if we found an alias, generate a connectable fh */ if (*max_len >= connected_handle_length && dentry) { dout("encode_fh %p connectable\n", dentry); @@ -90,6 +92,8 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len, *max_len = handle_length; type = 255; } + if (dentry) + dput(dentry); return type; } diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 5840d2aaed1..e51558fca3a 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -712,63 +712,53 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov, struct ceph_osd_client *osdc = &ceph_sb_to_client(inode->i_sb)->client->osdc; loff_t endoff = pos + iov->iov_len; - int want, got = 0; - int ret, err; + int got = 0; + int ret, err, written; if (ceph_snap(inode) != CEPH_NOSNAP) return -EROFS; retry_snap: + written = 0; if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) return -ENOSPC; __ceph_do_pending_vmtruncate(inode); - dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n", - inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len, - inode->i_size); - if (fi->fmode & CEPH_FILE_MODE_LAZY) - want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; - else - want = CEPH_CAP_FILE_BUFFER; - ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, endoff); - if (ret < 0) - goto out_put; - - dout("aio_write %p %llx.%llx %llu~%u got cap refs on %s\n", - inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len, - ceph_cap_string(got)); - - if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || - (iocb->ki_filp->f_flags & O_DIRECT) || - (inode->i_sb->s_flags & MS_SYNCHRONOUS) || - (fi->flags & CEPH_F_SYNC)) { - ret = ceph_sync_write(file, iov->iov_base, iov->iov_len, - &iocb->ki_pos); - } else { - /* - * buffered write; drop Fw early to avoid slow - * revocation if we get stuck on balance_dirty_pages - */ - int dirty; - - spin_lock(&ci->i_ceph_lock); - dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR); - spin_unlock(&ci->i_ceph_lock); - ceph_put_cap_refs(ci, got); + /* + * try to do a buffered write. if we don't have sufficient + * caps, we'll get -EAGAIN from generic_file_aio_write, or a + * short write if we only get caps for some pages. + */ + if (!(iocb->ki_filp->f_flags & O_DIRECT) && + !(inode->i_sb->s_flags & MS_SYNCHRONOUS) && + !(fi->flags & CEPH_F_SYNC)) { ret = generic_file_aio_write(iocb, iov, nr_segs, pos); + if (ret >= 0) + written = ret; + if ((ret >= 0 || ret == -EIOCBQUEUED) && ((file->f_flags & O_SYNC) || IS_SYNC(file->f_mapping->host) || ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_NEARFULL))) { - err = vfs_fsync_range(file, pos, pos + ret - 1, 1); + err = vfs_fsync_range(file, pos, pos + written - 1, 1); if (err < 0) ret = err; } + if ((ret < 0 && ret != -EAGAIN) || pos + written >= endoff) + goto out; + } - if (dirty) - __mark_inode_dirty(inode, dirty); + dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n", + inode, ceph_vinop(inode), pos + written, + (unsigned)iov->iov_len - written, inode->i_size); + ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, 0, &got, endoff); + if (ret < 0) goto out; - } + dout("aio_write %p %llx.%llx %llu~%u got cap refs on %s\n", + inode, ceph_vinop(inode), pos + written, + (unsigned)iov->iov_len - written, ceph_cap_string(got)); + ret = ceph_sync_write(file, iov->iov_base + written, + iov->iov_len - written, &iocb->ki_pos); if (ret >= 0) { int dirty; spin_lock(&ci->i_ceph_lock); @@ -777,13 +767,10 @@ retry_snap: if (dirty) __mark_inode_dirty(inode, dirty); } - -out_put: dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n", - inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len, - ceph_cap_string(got)); + inode, ceph_vinop(inode), pos + written, + (unsigned)iov->iov_len - written, ceph_cap_string(got)); ceph_put_cap_refs(ci, got); - out: if (ret == -EOLDSNAPC) { dout("aio_write %p %llx.%llx %llu~%u got EOLDSNAPC, retrying\n", @@ -797,7 +784,7 @@ out: /* * llseek. be sure to verify file size on SEEK_END. */ -static loff_t ceph_llseek(struct file *file, loff_t offset, int origin) +static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; int ret; @@ -805,7 +792,7 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int origin) mutex_lock(&inode->i_mutex); __ceph_do_pending_vmtruncate(inode); - if (origin == SEEK_END || origin == SEEK_DATA || origin == SEEK_HOLE) { + if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE); if (ret < 0) { offset = ret; @@ -813,7 +800,7 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int origin) } } - switch (origin) { + switch (whence) { case SEEK_END: offset += inode->i_size; break; diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index ba95eea201b..2971eaa65cd 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1466,7 +1466,7 @@ void __ceph_do_pending_vmtruncate(struct inode *inode) { struct ceph_inode_info *ci = ceph_inode(inode); u64 to; - int wrbuffer_refs, wake = 0; + int wrbuffer_refs, finish = 0; retry: spin_lock(&ci->i_ceph_lock); @@ -1498,15 +1498,18 @@ retry: truncate_inode_pages(inode->i_mapping, to); spin_lock(&ci->i_ceph_lock); - ci->i_truncate_pending--; - if (ci->i_truncate_pending == 0) - wake = 1; + if (to == ci->i_truncate_size) { + ci->i_truncate_pending = 0; + finish = 1; + } spin_unlock(&ci->i_ceph_lock); + if (!finish) + goto retry; if (wrbuffer_refs == 0) ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); - if (wake) - wake_up_all(&ci->i_cap_wq); + + wake_up_all(&ci->i_cap_wq); } diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 1bcf712655d..9165eb8309e 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1590,7 +1590,7 @@ static int set_request_path_attr(struct inode *rinode, struct dentry *rdentry, } else if (rpath || rino) { *ino = rino; *ppath = rpath; - *pathlen = strlen(rpath); + *pathlen = rpath ? strlen(rpath) : 0; dout(" path %.*s\n", *pathlen, rpath); } @@ -1876,9 +1876,14 @@ finish: static void __wake_requests(struct ceph_mds_client *mdsc, struct list_head *head) { - struct ceph_mds_request *req, *nreq; + struct ceph_mds_request *req; + LIST_HEAD(tmp_list); + + list_splice_init(head, &tmp_list); - list_for_each_entry_safe(req, nreq, head, r_wait) { + while (!list_empty(&tmp_list)) { + req = list_entry(tmp_list.next, + struct ceph_mds_request, r_wait); list_del_init(&req->r_wait); __do_request(mdsc, req); } diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 2eb43f21132..e86aa994812 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -403,8 +403,6 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root) seq_printf(m, ",mount_timeout=%d", opt->mount_timeout); if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl); - if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT) - seq_printf(m, ",osdtimeout=%d", opt->osd_timeout); if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) seq_printf(m, ",osdkeepalivetimeout=%d", opt->osd_keepalive_timeout); @@ -849,7 +847,7 @@ static int ceph_register_bdi(struct super_block *sb, fsc->backing_dev_info.ra_pages = default_backing_dev_info.ra_pages; - err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d", + err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld", atomic_long_inc_return(&bdi_seq)); if (!err) sb->s_bdi = &fsc->backing_dev_info; diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig index 2075ddfffa7..21ff76c22a1 100644 --- a/fs/cifs/Kconfig +++ b/fs/cifs/Kconfig @@ -122,9 +122,17 @@ config CIFS_ACL Allows fetching CIFS/NTFS ACL from the server. The DACL blob is handed over to the application/caller. +config CIFS_DEBUG + bool "Enable CIFS debugging routines" + default y + depends on CIFS + help + Enabling this option adds helpful debugging messages to + the cifs code which increases the size of the cifs module. + If unsure, say Y. config CIFS_DEBUG2 bool "Enable additional CIFS debugging routines" - depends on CIFS + depends on CIFS_DEBUG help Enabling this option adds a few more debugging routines to the cifs code which slightly increases the size of diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h index c0c68bb492d..69ae3d3c3b3 100644 --- a/fs/cifs/cifs_debug.h +++ b/fs/cifs/cifs_debug.h @@ -18,7 +18,6 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ -#define CIFS_DEBUG /* BB temporary */ #ifndef _H_CIFS_DEBUG #define _H_CIFS_DEBUG @@ -37,49 +36,39 @@ void dump_smb(void *, int); #define CIFS_RC 0x02 #define CIFS_TIMER 0x04 +extern int cifsFYI; + /* * debug ON * -------- */ -#ifdef CIFS_DEBUG +#ifdef CONFIG_CIFS_DEBUG /* information message: e.g., configuration, major event */ -extern int cifsFYI; -#define cifsfyi(fmt, arg...) \ +#define cifsfyi(fmt, ...) \ do { \ if (cifsFYI & CIFS_INFO) \ - printk(KERN_DEBUG "%s: " fmt "\n", __FILE__, ##arg); \ -} while (0) - -#define cFYI(set, fmt, arg...) \ -do { \ - if (set) \ - cifsfyi(fmt, ##arg); \ + printk(KERN_DEBUG "%s: " fmt "\n", \ + __FILE__, ##__VA_ARGS__); \ } while (0) -#define cifswarn(fmt, arg...) \ - printk(KERN_WARNING fmt "\n", ##arg) - -/* debug event message: */ -extern int cifsERROR; - -#define cEVENT(fmt, arg...) \ +#define cFYI(set, fmt, ...) \ do { \ - if (cifsERROR) \ - printk(KERN_EVENT "%s: " fmt "\n", __FILE__, ##arg); \ + if (set) \ + cifsfyi(fmt, ##__VA_ARGS__); \ } while (0) +#define cifswarn(fmt, ...) \ + printk(KERN_WARNING fmt "\n", ##__VA_ARGS__) + /* error event message: e.g., i/o error */ -#define cifserror(fmt, arg...) \ -do { \ - if (cifsERROR) \ - printk(KERN_ERR "CIFS VFS: " fmt "\n", ##arg); \ -} while (0) +#define cifserror(fmt, ...) \ + printk(KERN_ERR "CIFS VFS: " fmt "\n", ##__VA_ARGS__); \ -#define cERROR(set, fmt, arg...) \ -do { \ - if (set) \ - cifserror(fmt, ##arg); \ +#define cERROR(set, fmt, ...) \ +do { \ + if (set) \ + cifserror(fmt, ##__VA_ARGS__); \ } while (0) /* @@ -87,10 +76,27 @@ do { \ * --------- */ #else /* _CIFS_DEBUG */ -#define cERROR(set, fmt, arg...) -#define cEVENT(fmt, arg...) -#define cFYI(set, fmt, arg...) -#define cifserror(fmt, arg...) +#define cifsfyi(fmt, ...) \ +do { \ + if (0) \ + printk(KERN_DEBUG "%s: " fmt "\n", \ + __FILE__, ##__VA_ARGS__); \ +} while (0) +#define cFYI(set, fmt, ...) \ +do { \ + if (0 && set) \ + cifsfyi(fmt, ##__VA_ARGS__); \ +} while (0) +#define cifserror(fmt, ...) \ +do { \ + if (0) \ + printk(KERN_ERR "CIFS VFS: " fmt "\n", ##__VA_ARGS__); \ +} while (0) +#define cERROR(set, fmt, ...) \ +do { \ + if (0 && set) \ + cifserror(fmt, ##__VA_ARGS__); \ +} while (0) #endif /* _CIFS_DEBUG */ #endif /* _H_CIFS_DEBUG */ diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c index ce5cbd717bf..210fce2df30 100644 --- a/fs/cifs/cifs_dfs_ref.c +++ b/fs/cifs/cifs_dfs_ref.c @@ -226,6 +226,8 @@ compose_mount_options_out: compose_mount_options_err: kfree(mountdata); mountdata = ERR_PTR(rc); + kfree(*devname); + *devname = NULL; goto compose_mount_options_out; } diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index fc783e26442..5cbd00e7406 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -42,135 +42,27 @@ static const struct cifs_sid sid_authusers = { /* group users */ static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} }; -const struct cred *root_cred; - -static void -shrink_idmap_tree(struct rb_root *root, int nr_to_scan, int *nr_rem, - int *nr_del) -{ - struct rb_node *node; - struct rb_node *tmp; - struct cifs_sid_id *psidid; - - node = rb_first(root); - while (node) { - tmp = node; - node = rb_next(tmp); - psidid = rb_entry(tmp, struct cifs_sid_id, rbnode); - if (nr_to_scan == 0 || *nr_del == nr_to_scan) - ++(*nr_rem); - else { - if (time_after(jiffies, psidid->time + SID_MAP_EXPIRE) - && psidid->refcount == 0) { - rb_erase(tmp, root); - ++(*nr_del); - } else - ++(*nr_rem); - } - } -} - -/* - * Run idmap cache shrinker. - */ -static int -cifs_idmap_shrinker(struct shrinker *shrink, struct shrink_control *sc) -{ - int nr_to_scan = sc->nr_to_scan; - int nr_del = 0; - int nr_rem = 0; - struct rb_root *root; - - root = &uidtree; - spin_lock(&siduidlock); - shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del); - spin_unlock(&siduidlock); - - root = &gidtree; - spin_lock(&sidgidlock); - shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del); - spin_unlock(&sidgidlock); - - root = &siduidtree; - spin_lock(&uidsidlock); - shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del); - spin_unlock(&uidsidlock); - - root = &sidgidtree; - spin_lock(&gidsidlock); - shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del); - spin_unlock(&gidsidlock); - - return nr_rem; -} - -static void -sid_rb_insert(struct rb_root *root, unsigned long cid, - struct cifs_sid_id **psidid, char *typestr) -{ - char *strptr; - struct rb_node *node = root->rb_node; - struct rb_node *parent = NULL; - struct rb_node **linkto = &(root->rb_node); - struct cifs_sid_id *lsidid; - - while (node) { - lsidid = rb_entry(node, struct cifs_sid_id, rbnode); - parent = node; - if (cid > lsidid->id) { - linkto = &(node->rb_left); - node = node->rb_left; - } - if (cid < lsidid->id) { - linkto = &(node->rb_right); - node = node->rb_right; - } - } - - (*psidid)->id = cid; - (*psidid)->time = jiffies - (SID_MAP_RETRY + 1); - (*psidid)->refcount = 0; - - sprintf((*psidid)->sidstr, "%s", typestr); - strptr = (*psidid)->sidstr + strlen((*psidid)->sidstr); - sprintf(strptr, "%ld", cid); - - clear_bit(SID_ID_PENDING, &(*psidid)->state); - clear_bit(SID_ID_MAPPED, &(*psidid)->state); - - rb_link_node(&(*psidid)->rbnode, parent, linkto); - rb_insert_color(&(*psidid)->rbnode, root); -} - -static struct cifs_sid_id * -sid_rb_search(struct rb_root *root, unsigned long cid) -{ - struct rb_node *node = root->rb_node; - struct cifs_sid_id *lsidid; - - while (node) { - lsidid = rb_entry(node, struct cifs_sid_id, rbnode); - if (cid > lsidid->id) - node = node->rb_left; - else if (cid < lsidid->id) - node = node->rb_right; - else /* node found */ - return lsidid; - } - - return NULL; -} - -static struct shrinker cifs_shrinker = { - .shrink = cifs_idmap_shrinker, - .seeks = DEFAULT_SEEKS, -}; +static const struct cred *root_cred; static int cifs_idmap_key_instantiate(struct key *key, struct key_preparsed_payload *prep) { char *payload; + /* + * If the payload is less than or equal to the size of a pointer, then + * an allocation here is wasteful. Just copy the data directly to the + * payload.value union member instead. + * + * With this however, you must check the datalen before trying to + * dereference payload.data! + */ + if (prep->datalen <= sizeof(key->payload)) { + key->payload.value = 0; + memcpy(&key->payload.value, prep->data, prep->datalen); + key->datalen = prep->datalen; + return 0; + } payload = kmalloc(prep->datalen, GFP_KERNEL); if (!payload) return -ENOMEM; @@ -184,10 +76,11 @@ cifs_idmap_key_instantiate(struct key *key, struct key_preparsed_payload *prep) static inline void cifs_idmap_key_destroy(struct key *key) { - kfree(key->payload.data); + if (key->datalen > sizeof(key->payload)) + kfree(key->payload.data); } -struct key_type cifs_idmap_key_type = { +static struct key_type cifs_idmap_key_type = { .name = "cifs.idmap", .instantiate = cifs_idmap_key_instantiate, .destroy = cifs_idmap_key_destroy, @@ -195,214 +88,174 @@ struct key_type cifs_idmap_key_type = { .match = user_match, }; -static void -sid_to_str(struct cifs_sid *sidptr, char *sidstr) +static char * +sid_to_key_str(struct cifs_sid *sidptr, unsigned int type) { - int i; - unsigned long saval; - char *strptr; + int i, len; + unsigned int saval; + char *sidstr, *strptr; + unsigned long long id_auth_val; + + /* 3 bytes for prefix */ + sidstr = kmalloc(3 + SID_STRING_BASE_SIZE + + (SID_STRING_SUBAUTH_SIZE * sidptr->num_subauth), + GFP_KERNEL); + if (!sidstr) + return sidstr; strptr = sidstr; + len = sprintf(strptr, "%cs:S-%hhu", type == SIDOWNER ? 'o' : 'g', + sidptr->revision); + strptr += len; + + /* The authority field is a single 48-bit number */ + id_auth_val = (unsigned long long)sidptr->authority[5]; + id_auth_val |= (unsigned long long)sidptr->authority[4] << 8; + id_auth_val |= (unsigned long long)sidptr->authority[3] << 16; + id_auth_val |= (unsigned long long)sidptr->authority[2] << 24; + id_auth_val |= (unsigned long long)sidptr->authority[1] << 32; + id_auth_val |= (unsigned long long)sidptr->authority[0] << 48; - sprintf(strptr, "%s", "S"); - strptr = sidstr + strlen(sidstr); - - sprintf(strptr, "-%d", sidptr->revision); - strptr = sidstr + strlen(sidstr); + /* + * MS-DTYP states that if the authority is >= 2^32, then it should be + * expressed as a hex value. + */ + if (id_auth_val <= UINT_MAX) + len = sprintf(strptr, "-%llu", id_auth_val); + else + len = sprintf(strptr, "-0x%llx", id_auth_val); - for (i = 0; i < 6; ++i) { - if (sidptr->authority[i]) { - sprintf(strptr, "-%d", sidptr->authority[i]); - strptr = sidstr + strlen(sidstr); - } - } + strptr += len; for (i = 0; i < sidptr->num_subauth; ++i) { saval = le32_to_cpu(sidptr->sub_auth[i]); - sprintf(strptr, "-%ld", saval); - strptr = sidstr + strlen(sidstr); + len = sprintf(strptr, "-%u", saval); + strptr += len; } + + return sidstr; } -static void -id_rb_insert(struct rb_root *root, struct cifs_sid *sidptr, - struct cifs_sid_id **psidid, char *typestr) +/* + * if the two SIDs (roughly equivalent to a UUID for a user or group) are + * the same returns zero, if they do not match returns non-zero. + */ +static int +compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid) { - int rc; - char *strptr; - struct rb_node *node = root->rb_node; - struct rb_node *parent = NULL; - struct rb_node **linkto = &(root->rb_node); - struct cifs_sid_id *lsidid; - - while (node) { - lsidid = rb_entry(node, struct cifs_sid_id, rbnode); - parent = node; - rc = compare_sids(sidptr, &((lsidid)->sid)); - if (rc > 0) { - linkto = &(node->rb_left); - node = node->rb_left; - } else if (rc < 0) { - linkto = &(node->rb_right); - node = node->rb_right; - } - } - - memcpy(&(*psidid)->sid, sidptr, sizeof(struct cifs_sid)); - (*psidid)->time = jiffies - (SID_MAP_RETRY + 1); - (*psidid)->refcount = 0; + int i; + int num_subauth, num_sat, num_saw; - sprintf((*psidid)->sidstr, "%s", typestr); - strptr = (*psidid)->sidstr + strlen((*psidid)->sidstr); - sid_to_str(&(*psidid)->sid, strptr); + if ((!ctsid) || (!cwsid)) + return 1; - clear_bit(SID_ID_PENDING, &(*psidid)->state); - clear_bit(SID_ID_MAPPED, &(*psidid)->state); + /* compare the revision */ + if (ctsid->revision != cwsid->revision) { + if (ctsid->revision > cwsid->revision) + return 1; + else + return -1; + } - rb_link_node(&(*psidid)->rbnode, parent, linkto); - rb_insert_color(&(*psidid)->rbnode, root); -} + /* compare all of the six auth values */ + for (i = 0; i < NUM_AUTHS; ++i) { + if (ctsid->authority[i] != cwsid->authority[i]) { + if (ctsid->authority[i] > cwsid->authority[i]) + return 1; + else + return -1; + } + } -static struct cifs_sid_id * -id_rb_search(struct rb_root *root, struct cifs_sid *sidptr) -{ - int rc; - struct rb_node *node = root->rb_node; - struct cifs_sid_id *lsidid; - - while (node) { - lsidid = rb_entry(node, struct cifs_sid_id, rbnode); - rc = compare_sids(sidptr, &((lsidid)->sid)); - if (rc > 0) { - node = node->rb_left; - } else if (rc < 0) { - node = node->rb_right; - } else /* node found */ - return lsidid; + /* compare all of the subauth values if any */ + num_sat = ctsid->num_subauth; + num_saw = cwsid->num_subauth; + num_subauth = num_sat < num_saw ? num_sat : num_saw; + if (num_subauth) { + for (i = 0; i < num_subauth; ++i) { + if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) { + if (le32_to_cpu(ctsid->sub_auth[i]) > + le32_to_cpu(cwsid->sub_auth[i])) + return 1; + else + return -1; + } + } } - return NULL; + return 0; /* sids compare/match */ } -static int -sidid_pending_wait(void *unused) +static void +cifs_copy_sid(struct cifs_sid *dst, const struct cifs_sid *src) { - schedule(); - return signal_pending(current) ? -ERESTARTSYS : 0; + int i; + + dst->revision = src->revision; + dst->num_subauth = min_t(u8, src->num_subauth, SID_MAX_SUB_AUTHORITIES); + for (i = 0; i < NUM_AUTHS; ++i) + dst->authority[i] = src->authority[i]; + for (i = 0; i < dst->num_subauth; ++i) + dst->sub_auth[i] = src->sub_auth[i]; } static int -id_to_sid(unsigned long cid, uint sidtype, struct cifs_sid *ssid) +id_to_sid(unsigned int cid, uint sidtype, struct cifs_sid *ssid) { - int rc = 0; + int rc; struct key *sidkey; + struct cifs_sid *ksid; + unsigned int ksid_size; + char desc[3 + 10 + 1]; /* 3 byte prefix + 10 bytes for value + NULL */ const struct cred *saved_cred; - struct cifs_sid *lsid; - struct cifs_sid_id *psidid, *npsidid; - struct rb_root *cidtree; - spinlock_t *cidlock; - - if (sidtype == SIDOWNER) { - cidlock = &siduidlock; - cidtree = &uidtree; - } else if (sidtype == SIDGROUP) { - cidlock = &sidgidlock; - cidtree = &gidtree; - } else - return -EINVAL; - - spin_lock(cidlock); - psidid = sid_rb_search(cidtree, cid); - - if (!psidid) { /* node does not exist, allocate one & attempt adding */ - spin_unlock(cidlock); - npsidid = kzalloc(sizeof(struct cifs_sid_id), GFP_KERNEL); - if (!npsidid) - return -ENOMEM; - npsidid->sidstr = kmalloc(SIDLEN, GFP_KERNEL); - if (!npsidid->sidstr) { - kfree(npsidid); - return -ENOMEM; - } + rc = snprintf(desc, sizeof(desc), "%ci:%u", + sidtype == SIDOWNER ? 'o' : 'g', cid); + if (rc >= sizeof(desc)) + return -EINVAL; - spin_lock(cidlock); - psidid = sid_rb_search(cidtree, cid); - if (psidid) { /* node happened to get inserted meanwhile */ - ++psidid->refcount; - spin_unlock(cidlock); - kfree(npsidid->sidstr); - kfree(npsidid); - } else { - psidid = npsidid; - sid_rb_insert(cidtree, cid, &psidid, - sidtype == SIDOWNER ? "oi:" : "gi:"); - ++psidid->refcount; - spin_unlock(cidlock); - } - } else { - ++psidid->refcount; - spin_unlock(cidlock); + rc = 0; + saved_cred = override_creds(root_cred); + sidkey = request_key(&cifs_idmap_key_type, desc, ""); + if (IS_ERR(sidkey)) { + rc = -EINVAL; + cFYI(1, "%s: Can't map %cid %u to a SID", __func__, + sidtype == SIDOWNER ? 'u' : 'g', cid); + goto out_revert_creds; + } else if (sidkey->datalen < CIFS_SID_BASE_SIZE) { + rc = -EIO; + cFYI(1, "%s: Downcall contained malformed key " + "(datalen=%hu)", __func__, sidkey->datalen); + goto invalidate_key; } /* - * If we are here, it is safe to access psidid and its fields - * since a reference was taken earlier while holding the spinlock. - * A reference on the node is put without holding the spinlock - * and it is OK to do so in this case, shrinker will not erase - * this node until all references are put and we do not access - * any fields of the node after a reference is put . + * A sid is usually too large to be embedded in payload.value, but if + * there are no subauthorities and the host has 8-byte pointers, then + * it could be. */ - if (test_bit(SID_ID_MAPPED, &psidid->state)) { - memcpy(ssid, &psidid->sid, sizeof(struct cifs_sid)); - psidid->time = jiffies; /* update ts for accessing */ - goto id_sid_out; - } - - if (time_after(psidid->time + SID_MAP_RETRY, jiffies)) { - rc = -EINVAL; - goto id_sid_out; + ksid = sidkey->datalen <= sizeof(sidkey->payload) ? + (struct cifs_sid *)&sidkey->payload.value : + (struct cifs_sid *)sidkey->payload.data; + + ksid_size = CIFS_SID_BASE_SIZE + (ksid->num_subauth * sizeof(__le32)); + if (ksid_size > sidkey->datalen) { + rc = -EIO; + cFYI(1, "%s: Downcall contained malformed key (datalen=%hu, " + "ksid_size=%u)", __func__, sidkey->datalen, ksid_size); + goto invalidate_key; } - if (!test_and_set_bit(SID_ID_PENDING, &psidid->state)) { - saved_cred = override_creds(root_cred); - sidkey = request_key(&cifs_idmap_key_type, psidid->sidstr, ""); - if (IS_ERR(sidkey)) { - rc = -EINVAL; - cFYI(1, "%s: Can't map and id to a SID", __func__); - } else { - lsid = (struct cifs_sid *)sidkey->payload.data; - memcpy(&psidid->sid, lsid, - sidkey->datalen < sizeof(struct cifs_sid) ? - sidkey->datalen : sizeof(struct cifs_sid)); - memcpy(ssid, &psidid->sid, - sidkey->datalen < sizeof(struct cifs_sid) ? - sidkey->datalen : sizeof(struct cifs_sid)); - set_bit(SID_ID_MAPPED, &psidid->state); - key_put(sidkey); - kfree(psidid->sidstr); - } - psidid->time = jiffies; /* update ts for accessing */ - revert_creds(saved_cred); - clear_bit(SID_ID_PENDING, &psidid->state); - wake_up_bit(&psidid->state, SID_ID_PENDING); - } else { - rc = wait_on_bit(&psidid->state, SID_ID_PENDING, - sidid_pending_wait, TASK_INTERRUPTIBLE); - if (rc) { - cFYI(1, "%s: sidid_pending_wait interrupted %d", - __func__, rc); - --psidid->refcount; - return rc; - } - if (test_bit(SID_ID_MAPPED, &psidid->state)) - memcpy(ssid, &psidid->sid, sizeof(struct cifs_sid)); - else - rc = -EINVAL; - } -id_sid_out: - --psidid->refcount; + cifs_copy_sid(ssid, ksid); +out_key_put: + key_put(sidkey); +out_revert_creds: + revert_creds(saved_cred); return rc; + +invalidate_key: + key_invalidate(sidkey); + goto out_key_put; } static int @@ -410,111 +263,67 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid, struct cifs_fattr *fattr, uint sidtype) { int rc; - unsigned long cid; - struct key *idkey; + struct key *sidkey; + char *sidstr; const struct cred *saved_cred; - struct cifs_sid_id *psidid, *npsidid; - struct rb_root *cidtree; - spinlock_t *cidlock; - - if (sidtype == SIDOWNER) { - cid = cifs_sb->mnt_uid; /* default uid, in case upcall fails */ - cidlock = &siduidlock; - cidtree = &uidtree; - } else if (sidtype == SIDGROUP) { - cid = cifs_sb->mnt_gid; /* default gid, in case upcall fails */ - cidlock = &sidgidlock; - cidtree = &gidtree; - } else - return -ENOENT; - - spin_lock(cidlock); - psidid = id_rb_search(cidtree, psid); - - if (!psidid) { /* node does not exist, allocate one & attempt adding */ - spin_unlock(cidlock); - npsidid = kzalloc(sizeof(struct cifs_sid_id), GFP_KERNEL); - if (!npsidid) - return -ENOMEM; - - npsidid->sidstr = kmalloc(SIDLEN, GFP_KERNEL); - if (!npsidid->sidstr) { - kfree(npsidid); - return -ENOMEM; - } - - spin_lock(cidlock); - psidid = id_rb_search(cidtree, psid); - if (psidid) { /* node happened to get inserted meanwhile */ - ++psidid->refcount; - spin_unlock(cidlock); - kfree(npsidid->sidstr); - kfree(npsidid); - } else { - psidid = npsidid; - id_rb_insert(cidtree, psid, &psidid, - sidtype == SIDOWNER ? "os:" : "gs:"); - ++psidid->refcount; - spin_unlock(cidlock); - } - } else { - ++psidid->refcount; - spin_unlock(cidlock); - } + uid_t fuid = cifs_sb->mnt_uid; + gid_t fgid = cifs_sb->mnt_gid; /* - * If we are here, it is safe to access psidid and its fields - * since a reference was taken earlier while holding the spinlock. - * A reference on the node is put without holding the spinlock - * and it is OK to do so in this case, shrinker will not erase - * this node until all references are put and we do not access - * any fields of the node after a reference is put . + * If we have too many subauthorities, then something is really wrong. + * Just return an error. */ - if (test_bit(SID_ID_MAPPED, &psidid->state)) { - cid = psidid->id; - psidid->time = jiffies; /* update ts for accessing */ - goto sid_to_id_out; + if (unlikely(psid->num_subauth > SID_MAX_SUB_AUTHORITIES)) { + cFYI(1, "%s: %u subauthorities is too many!", __func__, + psid->num_subauth); + return -EIO; } - if (time_after(psidid->time + SID_MAP_RETRY, jiffies)) - goto sid_to_id_out; - - if (!test_and_set_bit(SID_ID_PENDING, &psidid->state)) { - saved_cred = override_creds(root_cred); - idkey = request_key(&cifs_idmap_key_type, psidid->sidstr, ""); - if (IS_ERR(idkey)) - cFYI(1, "%s: Can't map SID to an id", __func__); - else { - cid = *(unsigned long *)idkey->payload.value; - psidid->id = cid; - set_bit(SID_ID_MAPPED, &psidid->state); - key_put(idkey); - kfree(psidid->sidstr); - } - revert_creds(saved_cred); - psidid->time = jiffies; /* update ts for accessing */ - clear_bit(SID_ID_PENDING, &psidid->state); - wake_up_bit(&psidid->state, SID_ID_PENDING); - } else { - rc = wait_on_bit(&psidid->state, SID_ID_PENDING, - sidid_pending_wait, TASK_INTERRUPTIBLE); - if (rc) { - cFYI(1, "%s: sidid_pending_wait interrupted %d", - __func__, rc); - --psidid->refcount; /* decremented without spinlock */ - return rc; - } - if (test_bit(SID_ID_MAPPED, &psidid->state)) - cid = psidid->id; + sidstr = sid_to_key_str(psid, sidtype); + if (!sidstr) + return -ENOMEM; + + saved_cred = override_creds(root_cred); + sidkey = request_key(&cifs_idmap_key_type, sidstr, ""); + if (IS_ERR(sidkey)) { + rc = -EINVAL; + cFYI(1, "%s: Can't map SID %s to a %cid", __func__, sidstr, + sidtype == SIDOWNER ? 'u' : 'g'); + goto out_revert_creds; + } + + /* + * FIXME: Here we assume that uid_t and gid_t are same size. It's + * probably a safe assumption but might be better to check based on + * sidtype. + */ + if (sidkey->datalen != sizeof(uid_t)) { + rc = -EIO; + cFYI(1, "%s: Downcall contained malformed key " + "(datalen=%hu)", __func__, sidkey->datalen); + key_invalidate(sidkey); + goto out_key_put; } -sid_to_id_out: - --psidid->refcount; /* decremented without spinlock */ if (sidtype == SIDOWNER) - fattr->cf_uid = cid; + memcpy(&fuid, &sidkey->payload.value, sizeof(uid_t)); else - fattr->cf_gid = cid; + memcpy(&fgid, &sidkey->payload.value, sizeof(gid_t)); + +out_key_put: + key_put(sidkey); +out_revert_creds: + revert_creds(saved_cred); + kfree(sidstr); + /* + * Note that we return 0 here unconditionally. If the mapping + * fails then we just fall back to using the mnt_uid/mnt_gid. + */ + if (sidtype == SIDOWNER) + fattr->cf_uid = fuid; + else + fattr->cf_gid = fgid; return 0; } @@ -537,19 +346,15 @@ init_cifs_idmap(void) if (!cred) return -ENOMEM; - keyring = key_alloc(&key_type_keyring, ".cifs_idmap", 0, 0, cred, - (KEY_POS_ALL & ~KEY_POS_SETATTR) | - KEY_USR_VIEW | KEY_USR_READ, - KEY_ALLOC_NOT_IN_QUOTA); + keyring = keyring_alloc(".cifs_idmap", 0, 0, cred, + (KEY_POS_ALL & ~KEY_POS_SETATTR) | + KEY_USR_VIEW | KEY_USR_READ, + KEY_ALLOC_NOT_IN_QUOTA, NULL); if (IS_ERR(keyring)) { ret = PTR_ERR(keyring); goto failed_put_cred; } - ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL); - if (ret < 0) - goto failed_put_key; - ret = register_key_type(&cifs_idmap_key_type); if (ret < 0) goto failed_put_key; @@ -561,17 +366,6 @@ init_cifs_idmap(void) cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING; root_cred = cred; - spin_lock_init(&siduidlock); - uidtree = RB_ROOT; - spin_lock_init(&sidgidlock); - gidtree = RB_ROOT; - - spin_lock_init(&uidsidlock); - siduidtree = RB_ROOT; - spin_lock_init(&gidsidlock); - sidgidtree = RB_ROOT; - register_shrinker(&cifs_shrinker); - cFYI(1, "cifs idmap keyring: %d", key_serial(keyring)); return 0; @@ -588,95 +382,13 @@ exit_cifs_idmap(void) key_revoke(root_cred->thread_keyring); unregister_key_type(&cifs_idmap_key_type); put_cred(root_cred); - unregister_shrinker(&cifs_shrinker); cFYI(1, "Unregistered %s key type", cifs_idmap_key_type.name); } -void -cifs_destroy_idmaptrees(void) -{ - struct rb_root *root; - struct rb_node *node; - - root = &uidtree; - spin_lock(&siduidlock); - while ((node = rb_first(root))) - rb_erase(node, root); - spin_unlock(&siduidlock); - - root = &gidtree; - spin_lock(&sidgidlock); - while ((node = rb_first(root))) - rb_erase(node, root); - spin_unlock(&sidgidlock); - - root = &siduidtree; - spin_lock(&uidsidlock); - while ((node = rb_first(root))) - rb_erase(node, root); - spin_unlock(&uidsidlock); - - root = &sidgidtree; - spin_lock(&gidsidlock); - while ((node = rb_first(root))) - rb_erase(node, root); - spin_unlock(&gidsidlock); -} - -/* if the two SIDs (roughly equivalent to a UUID for a user or group) are - the same returns 1, if they do not match returns 0 */ -int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid) -{ - int i; - int num_subauth, num_sat, num_saw; - - if ((!ctsid) || (!cwsid)) - return 1; - - /* compare the revision */ - if (ctsid->revision != cwsid->revision) { - if (ctsid->revision > cwsid->revision) - return 1; - else - return -1; - } - - /* compare all of the six auth values */ - for (i = 0; i < 6; ++i) { - if (ctsid->authority[i] != cwsid->authority[i]) { - if (ctsid->authority[i] > cwsid->authority[i]) - return 1; - else - return -1; - } - } - - /* compare all of the subauth values if any */ - num_sat = ctsid->num_subauth; - num_saw = cwsid->num_subauth; - num_subauth = num_sat < num_saw ? num_sat : num_saw; - if (num_subauth) { - for (i = 0; i < num_subauth; ++i) { - if (ctsid->sub_auth[i] != cwsid->sub_auth[i]) { - if (le32_to_cpu(ctsid->sub_auth[i]) > - le32_to_cpu(cwsid->sub_auth[i])) - return 1; - else - return -1; - } - } - } - - return 0; /* sids compare/match */ -} - - /* copy ntsd, owner sid, and group sid from a security descriptor to another */ static void copy_sec_desc(const struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd, __u32 sidsoffset) { - int i; - struct cifs_sid *owner_sid_ptr, *group_sid_ptr; struct cifs_sid *nowner_sid_ptr, *ngroup_sid_ptr; @@ -692,26 +404,14 @@ static void copy_sec_desc(const struct cifs_ntsd *pntsd, owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + le32_to_cpu(pntsd->osidoffset)); nowner_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset); - - nowner_sid_ptr->revision = owner_sid_ptr->revision; - nowner_sid_ptr->num_subauth = owner_sid_ptr->num_subauth; - for (i = 0; i < 6; i++) - nowner_sid_ptr->authority[i] = owner_sid_ptr->authority[i]; - for (i = 0; i < 5; i++) - nowner_sid_ptr->sub_auth[i] = owner_sid_ptr->sub_auth[i]; + cifs_copy_sid(nowner_sid_ptr, owner_sid_ptr); /* copy group sid */ group_sid_ptr = (struct cifs_sid *)((char *)pntsd + le32_to_cpu(pntsd->gsidoffset)); ngroup_sid_ptr = (struct cifs_sid *)((char *)pnntsd + sidsoffset + sizeof(struct cifs_sid)); - - ngroup_sid_ptr->revision = group_sid_ptr->revision; - ngroup_sid_ptr->num_subauth = group_sid_ptr->num_subauth; - for (i = 0; i < 6; i++) - ngroup_sid_ptr->authority[i] = group_sid_ptr->authority[i]; - for (i = 0; i < 5; i++) - ngroup_sid_ptr->sub_auth[i] = group_sid_ptr->sub_auth[i]; + cifs_copy_sid(ngroup_sid_ptr, group_sid_ptr); return; } @@ -818,7 +518,7 @@ static __u16 fill_ace_for_sid(struct cifs_ace *pntace, pntace->sid.revision = psid->revision; pntace->sid.num_subauth = psid->num_subauth; - for (i = 0; i < 6; i++) + for (i = 0; i < NUM_AUTHS; i++) pntace->sid.authority[i] = psid->authority[i]; for (i = 0; i < psid->num_subauth; i++) pntace->sid.sub_auth[i] = psid->sub_auth[i]; @@ -994,8 +694,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl) return -EINVAL; } - if (psid->num_subauth) { #ifdef CONFIG_CIFS_DEBUG2 + if (psid->num_subauth) { int i; cFYI(1, "SID revision %d num_auth %d", psid->revision, psid->num_subauth); @@ -1009,8 +709,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl) num auths and therefore go off the end */ cFYI(1, "RID 0x%x", le32_to_cpu(psid->sub_auth[psid->num_subauth-1])); -#endif } +#endif return 0; } @@ -1120,8 +820,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd, kfree(nowner_sid_ptr); return rc; } - memcpy(owner_sid_ptr, nowner_sid_ptr, - sizeof(struct cifs_sid)); + cifs_copy_sid(owner_sid_ptr, nowner_sid_ptr); kfree(nowner_sid_ptr); *aclflag = CIFS_ACL_OWNER; } @@ -1139,8 +838,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd, kfree(ngroup_sid_ptr); return rc; } - memcpy(group_sid_ptr, ngroup_sid_ptr, - sizeof(struct cifs_sid)); + cifs_copy_sid(group_sid_ptr, ngroup_sid_ptr); kfree(ngroup_sid_ptr); *aclflag = CIFS_ACL_GROUP; } @@ -1316,42 +1014,39 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode, /* Get the security descriptor */ pntsd = get_cifs_acl(CIFS_SB(inode->i_sb), inode, path, &secdesclen); - - /* Add three ACEs for owner, group, everyone getting rid of - other ACEs as chmod disables ACEs and set the security descriptor */ - if (IS_ERR(pntsd)) { rc = PTR_ERR(pntsd); cERROR(1, "%s: error %d getting sec desc", __func__, rc); - } else { - /* allocate memory for the smb header, - set security descriptor request security descriptor - parameters, and secuirty descriptor itself */ - - secdesclen = secdesclen < DEFSECDESCLEN ? - DEFSECDESCLEN : secdesclen; - pnntsd = kmalloc(secdesclen, GFP_KERNEL); - if (!pnntsd) { - cERROR(1, "Unable to allocate security descriptor"); - kfree(pntsd); - return -ENOMEM; - } + goto out; + } - rc = build_sec_desc(pntsd, pnntsd, secdesclen, nmode, uid, gid, - &aclflag); + /* + * Add three ACEs for owner, group, everyone getting rid of other ACEs + * as chmod disables ACEs and set the security descriptor. Allocate + * memory for the smb header, set security descriptor request security + * descriptor parameters, and secuirty descriptor itself + */ + secdesclen = max_t(u32, secdesclen, DEFAULT_SEC_DESC_LEN); + pnntsd = kmalloc(secdesclen, GFP_KERNEL); + if (!pnntsd) { + cERROR(1, "Unable to allocate security descriptor"); + kfree(pntsd); + return -ENOMEM; + } - cFYI(DBG2, "build_sec_desc rc: %d", rc); + rc = build_sec_desc(pntsd, pnntsd, secdesclen, nmode, uid, gid, + &aclflag); - if (!rc) { - /* Set the security descriptor */ - rc = set_cifs_acl(pnntsd, secdesclen, inode, - path, aclflag); - cFYI(DBG2, "set_cifs_acl rc: %d", rc); - } + cFYI(DBG2, "build_sec_desc rc: %d", rc); - kfree(pnntsd); - kfree(pntsd); + if (!rc) { + /* Set the security descriptor */ + rc = set_cifs_acl(pnntsd, secdesclen, inode, path, aclflag); + cFYI(DBG2, "set_cifs_acl rc: %d", rc); } + kfree(pnntsd); + kfree(pntsd); +out: return rc; } diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h index 5c902c7ce52..4f388483526 100644 --- a/fs/cifs/cifsacl.h +++ b/fs/cifs/cifsacl.h @@ -23,11 +23,8 @@ #define _CIFSACL_H -#define NUM_AUTHS 6 /* number of authority fields */ -#define NUM_SUBAUTHS 5 /* number of sub authority fields */ -#define NUM_WK_SIDS 7 /* number of well known sids */ -#define SIDNAMELENGTH 20 /* long enough for the ones we care about */ -#define DEFSECDESCLEN 192 /* sec desc len contaiting a dacl with three aces */ +#define NUM_AUTHS (6) /* number of authority fields */ +#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */ #define READ_BIT 0x4 #define WRITE_BIT 0x2 @@ -41,12 +38,32 @@ #define SIDOWNER 1 #define SIDGROUP 2 -#define SIDLEN 150 /* S- 1 revision- 6 authorities- max 5 sub authorities */ -#define SID_ID_MAPPED 0 -#define SID_ID_PENDING 1 -#define SID_MAP_EXPIRE (3600 * HZ) /* map entry expires after one hour */ -#define SID_MAP_RETRY (300 * HZ) /* wait 5 minutes for next attempt to map */ +/* + * Security Descriptor length containing DACL with 3 ACEs (one each for + * owner, group and world). + */ +#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \ + sizeof(struct cifs_acl) + \ + (sizeof(struct cifs_ace) * 3)) + +/* + * Maximum size of a string representation of a SID: + * + * The fields are unsigned values in decimal. So: + * + * u8: max 3 bytes in decimal + * u32: max 10 bytes in decimal + * + * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator + * + * For authority field, max is when all 6 values are non-zero and it must be + * represented in hex. So "-0x" + 12 hex digits. + * + * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-') + */ +#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1) +#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */ struct cifs_ntsd { __le16 revision; /* revision level */ @@ -60,10 +77,13 @@ struct cifs_ntsd { struct cifs_sid { __u8 revision; /* revision level */ __u8 num_subauth; - __u8 authority[6]; - __le32 sub_auth[5]; /* sub_auth[num_subauth] */ + __u8 authority[NUM_AUTHS]; + __le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */ } __attribute__((packed)); +/* size of a struct cifs_sid, sans sub_auth array */ +#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS) + struct cifs_acl { __le16 revision; /* revision level */ __le16 size; @@ -78,26 +98,4 @@ struct cifs_ace { struct cifs_sid sid; /* ie UUID of user or group who gets these perms */ } __attribute__((packed)); -struct cifs_wksid { - struct cifs_sid cifssid; - char sidname[SIDNAMELENGTH]; -} __attribute__((packed)); - -struct cifs_sid_id { - unsigned int refcount; /* increment with spinlock, decrement without */ - unsigned long id; - unsigned long time; - unsigned long state; - char *sidstr; - struct rb_node rbnode; - struct cifs_sid sid; -}; - -#ifdef __KERNEL__ -extern struct key_type cifs_idmap_key_type; -extern const struct cred *root_cred; -#endif /* KERNEL */ - -extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *); - #endif /* _CIFSACL_H */ diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index e7931cc55d0..de7f9168a11 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -54,7 +54,6 @@ #endif int cifsFYI = 0; -int cifsERROR = 1; int traceSMB = 0; bool enable_oplocks = true; unsigned int linuxExtEnabled = 1; @@ -64,24 +63,23 @@ unsigned int global_secflags = CIFSSEC_DEF; unsigned int sign_CIFS_PDUs = 1; static const struct super_operations cifs_super_ops; unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; -module_param(CIFSMaxBufSize, int, 0); +module_param(CIFSMaxBufSize, uint, 0); MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " "Default: 16384 Range: 8192 to 130048"); unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; -module_param(cifs_min_rcv, int, 0); +module_param(cifs_min_rcv, uint, 0); MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " "1 to 64"); unsigned int cifs_min_small = 30; -module_param(cifs_min_small, int, 0); +module_param(cifs_min_small, uint, 0); MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " "Range: 2 to 256"); unsigned int cifs_max_pending = CIFS_MAX_REQ; -module_param(cifs_max_pending, int, 0444); +module_param(cifs_max_pending, uint, 0444); MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " "Default: 32767 Range: 2 to 32767."); module_param(enable_oplocks, bool, 0644); -MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:" - "y/Y/1"); +MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); extern mempool_t *cifs_sm_req_poolp; extern mempool_t *cifs_req_poolp; @@ -540,8 +538,8 @@ cifs_get_root(struct smb_vol *vol, struct super_block *sb) char *s, *p; char sep; - full_path = build_path_to_root(vol, cifs_sb, - cifs_sb_master_tcon(cifs_sb)); + full_path = cifs_build_path_to_root(vol, cifs_sb, + cifs_sb_master_tcon(cifs_sb)); if (full_path == NULL) return ERR_PTR(-ENOMEM); @@ -695,13 +693,13 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, return written; } -static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) +static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) { /* - * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate + * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate * the cached file length */ - if (origin != SEEK_SET && origin != SEEK_CUR) { + if (whence != SEEK_SET && whence != SEEK_CUR) { int rc; struct inode *inode = file->f_path.dentry->d_inode; @@ -728,7 +726,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) if (rc < 0) return (loff_t)rc; } - return generic_file_llseek(file, offset, origin); + return generic_file_llseek(file, offset, whence); } static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) @@ -1205,7 +1203,6 @@ exit_cifs(void) unregister_filesystem(&cifs_fs_type); cifs_dfs_release_automount_timer(); #ifdef CONFIG_CIFS_ACL - cifs_destroy_idmaptrees(); exit_cifs_idmap(); #endif #ifdef CONFIG_CIFS_UPCALL diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index f5af2527fc6..e6899cea1c3 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -178,6 +178,7 @@ struct smb_rqst { enum smb_version { Smb_1 = 1, + Smb_20, Smb_21, Smb_30, }; @@ -280,9 +281,6 @@ struct smb_version_operations { /* set attributes */ int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *, const unsigned int); - /* build a full path to the root of the mount */ - char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *, - struct cifs_tcon *); /* check if we can send an echo or nor */ bool (*can_echo)(struct TCP_Server_Info *); /* send echo request */ @@ -369,6 +367,8 @@ struct smb_version_operations { void (*set_lease_key)(struct inode *, struct cifs_fid *fid); /* generate new lease key */ void (*new_lease_key)(struct cifs_fid *fid); + int (*calc_signature)(struct smb_rqst *rqst, + struct TCP_Server_Info *server); }; struct smb_version_values { @@ -386,6 +386,7 @@ struct smb_version_values { unsigned int cap_unix; unsigned int cap_nt_find; unsigned int cap_large_files; + unsigned int oplock_read; }; #define HEADER_SIZE(server) (server->vals->header_size) @@ -396,7 +397,6 @@ struct smb_vol { char *password; char *domainname; char *UNC; - char *UNCip; char *iocharset; /* local code page for mapping to and from Unicode */ char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */ char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */ @@ -444,11 +444,11 @@ struct smb_vol { unsigned int rsize; unsigned int wsize; bool sockopt_tcp_nodelay:1; - unsigned short int port; unsigned long actimeo; /* attribute cache timeout (jiffies) */ struct smb_version_operations *ops; struct smb_version_values *vals; char *prepath; + struct sockaddr_storage dstaddr; /* destination address */ struct sockaddr_storage srcaddr; /* allow binding to a local IP */ struct nls_table *local_nls; }; @@ -1067,30 +1067,16 @@ static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) static inline void convert_delimiter(char *path, char delim) { - int i; - char old_delim; - - if (path == NULL) - return; + char old_delim, *pos; if (delim == '/') old_delim = '\\'; else old_delim = '/'; - for (i = 0; path[i] != '\0'; i++) { - if (path[i] == old_delim) - path[i] = delim; - } -} - -static inline char * -build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, - struct cifs_tcon *tcon) -{ - if (!vol->ops->build_path_to_root) - return NULL; - return vol->ops->build_path_to_root(vol, cifs_sb, tcon); + pos = path; + while ((pos = strchr(pos, old_delim))) + *pos = delim; } #ifdef CONFIG_CIFS_STATS @@ -1362,7 +1348,7 @@ require use of the stronger protocol */ #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ -#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP) +#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMSSP) #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2) #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) /* @@ -1506,6 +1492,6 @@ extern struct smb_version_values smb20_values; extern struct smb_version_operations smb21_operations; extern struct smb_version_values smb21_values; #define SMB30_VERSION_STRING "3.0" -/*extern struct smb_version_operations smb30_operations; */ /* not needed yet */ +extern struct smb_version_operations smb30_operations; extern struct smb_version_values smb30_values; #endif /* _CIFS_GLOB_H */ diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 5144e9fbeb8..1988c1baa22 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -58,8 +58,10 @@ do { \ } while (0) extern int init_cifs_idmap(void); extern void exit_cifs_idmap(void); -extern void cifs_destroy_idmaptrees(void); extern char *build_path_from_dentry(struct dentry *); +extern char *cifs_build_path_to_root(struct smb_vol *vol, + struct cifs_sb_info *cifs_sb, + struct cifs_tcon *tcon); extern char *build_wildcard_path_from_dentry(struct dentry *direntry); extern char *cifs_compose_mount_options(const char *sb_mountdata, const char *fullpath, const struct dfs_info3_param *ref, @@ -107,9 +109,7 @@ extern unsigned int smbCalcSize(void *buf); extern int decode_negTokenInit(unsigned char *security_blob, int length, struct TCP_Server_Info *server); extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len); -extern int cifs_set_port(struct sockaddr *addr, const unsigned short int port); -extern int cifs_fill_sockaddr(struct sockaddr *dst, const char *src, int len, - const unsigned short int port); +extern void cifs_set_port(struct sockaddr *addr, const unsigned short int port); extern int map_smb_to_linux_error(char *buf, bool logErr); extern void header_assemble(struct smb_hdr *, char /* command */ , const struct cifs_tcon *, int /* length of @@ -185,7 +185,7 @@ extern void cifs_mark_open_files_invalid(struct cifs_tcon *tcon); extern bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length, __u8 type, struct cifsLockInfo **conf_lock, - bool rw_check); + int rw_check); extern void cifs_add_pending_open(struct cifs_fid *fid, struct tcon_link *tlink, struct cifs_pending_open *open); diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 5c670b998ff..12b3da39733 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -186,6 +186,7 @@ static const match_table_t cifs_mount_option_tokens = { { Opt_user, "user=%s" }, { Opt_user, "username=%s" }, { Opt_blank_pass, "pass=" }, + { Opt_blank_pass, "password=" }, { Opt_pass, "pass=%s" }, { Opt_pass, "password=%s" }, { Opt_blank_ip, "ip=" }, @@ -274,6 +275,7 @@ static const match_table_t cifs_cacheflavor_tokens = { static const match_table_t cifs_smb_version_tokens = { { Smb_1, SMB1_VERSION_STRING }, + { Smb_20, SMB20_VERSION_STRING}, { Smb_21, SMB21_VERSION_STRING }, { Smb_30, SMB30_VERSION_STRING }, }; @@ -1074,12 +1076,16 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol) vol->vals = &smb1_values; break; #ifdef CONFIG_CIFS_SMB2 + case Smb_20: + vol->ops = &smb21_operations; /* currently identical with 2.1 */ + vol->vals = &smb20_values; + break; case Smb_21: vol->ops = &smb21_operations; vol->vals = &smb21_values; break; case Smb_30: - vol->ops = &smb21_operations; /* currently identical with 2.1 */ + vol->ops = &smb30_operations; vol->vals = &smb30_values; break; #endif @@ -1090,6 +1096,52 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol) return 0; } +/* + * Parse a devname into substrings and populate the vol->UNC and vol->prepath + * fields with the result. Returns 0 on success and an error otherwise. + */ +static int +cifs_parse_devname(const char *devname, struct smb_vol *vol) +{ + char *pos; + const char *delims = "/\\"; + size_t len; + + /* make sure we have a valid UNC double delimiter prefix */ + len = strspn(devname, delims); + if (len != 2) + return -EINVAL; + + /* find delimiter between host and sharename */ + pos = strpbrk(devname + 2, delims); + if (!pos) + return -EINVAL; + + /* skip past delimiter */ + ++pos; + + /* now go until next delimiter or end of string */ + len = strcspn(pos, delims); + + /* move "pos" up to delimiter or NULL */ + pos += len; + vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); + if (!vol->UNC) + return -ENOMEM; + + convert_delimiter(vol->UNC, '\\'); + + /* If pos is NULL, or is a bogus trailing delimiter then no prepath */ + if (!*pos++ || !*pos) + return 0; + + vol->prepath = kstrdup(pos, GFP_KERNEL); + if (!vol->prepath) + return -ENOMEM; + + return 0; +} + static int cifs_parse_mount_options(const char *mountdata, const char *devname, struct smb_vol *vol) @@ -1108,11 +1160,17 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, char *string = NULL; char *tmp_end, *value; char delim; + bool got_ip = false; + unsigned short port = 0; + struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; separator[0] = ','; separator[1] = 0; delim = separator[0]; + /* ensure we always start with zeroed-out smb_vol */ + memset(vol, 0, sizeof(*vol)); + /* * does not have to be perfect mapping since field is * informational, only used for servers that do not support @@ -1169,6 +1227,16 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, vol->backupuid_specified = false; /* no backup intent for a user */ vol->backupgid_specified = false; /* no backup intent for a group */ + /* + * For now, we ignore -EINVAL errors under the assumption that the + * unc= and prefixpath= options will be usable. + */ + if (cifs_parse_devname(devname, vol) == -ENOMEM) { + printk(KERN_ERR "CIFS: Unable to allocate memory to parse " + "device string.\n"); + goto out_nomem; + } + while ((data = strsep(&options, separator)) != NULL) { substring_t args[MAX_OPT_ARGS]; unsigned long option; @@ -1416,12 +1484,12 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, vol->dir_mode = option; break; case Opt_port: - if (get_option_ul(args, &option)) { - cERROR(1, "%s: Invalid port value", - __func__); + if (get_option_ul(args, &option) || + option > USHRT_MAX) { + cERROR(1, "%s: Invalid port value", __func__); goto cifs_parse_mount_err; } - vol->port = option; + port = (unsigned short)option; break; case Opt_rsize: if (get_option_ul(args, &option)) { @@ -1537,53 +1605,45 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, vol->password[j] = '\0'; break; case Opt_blank_ip: - vol->UNCip = NULL; + /* FIXME: should this be an error instead? */ + got_ip = false; break; case Opt_ip: string = match_strdup(args); if (string == NULL) goto out_nomem; - if (strnlen(string, INET6_ADDRSTRLEN) > - INET6_ADDRSTRLEN) { - printk(KERN_WARNING "CIFS: ip address " - "too long\n"); - goto cifs_parse_mount_err; - } - vol->UNCip = kstrdup(string, GFP_KERNEL); - if (!vol->UNCip) { - printk(KERN_WARNING "CIFS: no memory " - "for UNC IP\n"); + if (!cifs_convert_address(dstaddr, string, + strlen(string))) { + printk(KERN_ERR "CIFS: bad ip= option (%s).\n", + string); goto cifs_parse_mount_err; } + got_ip = true; break; case Opt_unc: - string = match_strdup(args); - if (string == NULL) + string = vol->UNC; + vol->UNC = match_strdup(args); + if (vol->UNC == NULL) goto out_nomem; - temp_len = strnlen(string, 300); - if (temp_len == 300) { - printk(KERN_WARNING "CIFS: UNC name too long\n"); - goto cifs_parse_mount_err; - } - - vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); - if (vol->UNC == NULL) { - printk(KERN_WARNING "CIFS: no memory for UNC\n"); - goto cifs_parse_mount_err; - } - strcpy(vol->UNC, string); - - if (strncmp(string, "//", 2) == 0) { - vol->UNC[0] = '\\'; - vol->UNC[1] = '\\'; - } else if (strncmp(string, "\\\\", 2) != 0) { - printk(KERN_WARNING "CIFS: UNC Path does not " - "begin with // or \\\\\n"); + convert_delimiter(vol->UNC, '\\'); + if (vol->UNC[0] != '\\' || vol->UNC[1] != '\\') { + printk(KERN_ERR "CIFS: UNC Path does not " + "begin with // or \\\\\n"); goto cifs_parse_mount_err; } + /* Compare old unc= option to new one */ + if (!string || strcmp(string, vol->UNC)) + printk(KERN_WARNING "CIFS: the value of the " + "unc= mount option does not match the " + "device string. Using the unc= option " + "for now. In 3.10, that option will " + "be ignored and the contents of the " + "device string will be used " + "instead. (%s != %s)\n", string, + vol->UNC); break; case Opt_domain: string = match_strdup(args); @@ -1618,31 +1678,24 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, } break; case Opt_prefixpath: - string = match_strdup(args); - if (string == NULL) - goto out_nomem; - - temp_len = strnlen(string, 1024); - if (string[0] != '/') - temp_len++; /* missing leading slash */ - if (temp_len > 1024) { - printk(KERN_WARNING "CIFS: prefix too long\n"); - goto cifs_parse_mount_err; - } - - vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); - if (vol->prepath == NULL) { - printk(KERN_WARNING "CIFS: no memory " - "for path prefix\n"); - goto cifs_parse_mount_err; - } - - if (string[0] != '/') { - vol->prepath[0] = '/'; - strcpy(vol->prepath+1, string); - } else - strcpy(vol->prepath, string); + /* skip over any leading delimiter */ + if (*args[0].from == '/' || *args[0].from == '\\') + args[0].from++; + string = vol->prepath; + vol->prepath = match_strdup(args); + if (vol->prepath == NULL) + goto out_nomem; + /* Compare old prefixpath= option to new one */ + if (!string || strcmp(string, vol->prepath)) + printk(KERN_WARNING "CIFS: the value of the " + "prefixpath= mount option does not " + "match the device string. Using the " + "prefixpath= option for now. In 3.10, " + "that option will be ignored and the " + "contents of the device string will be " + "used instead.(%s != %s)\n", string, + vol->prepath); break; case Opt_iocharset: string = match_strdup(args); @@ -1799,9 +1852,30 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, goto cifs_parse_mount_err; } #endif + if (!vol->UNC) { + cERROR(1, "CIFS mount error: No usable UNC path provided in " + "device string or in unc= option!"); + goto cifs_parse_mount_err; + } - if (vol->UNCip == NULL) - vol->UNCip = &vol->UNC[2]; + /* make sure UNC has a share name */ + if (!strchr(vol->UNC + 3, '\\')) { + cERROR(1, "Malformed UNC. Unable to find share name."); + goto cifs_parse_mount_err; + } + + if (!got_ip) { + /* No ip= option specified? Try to get it from UNC */ + if (!cifs_convert_address(dstaddr, &vol->UNC[2], + strlen(&vol->UNC[2]))) { + printk(KERN_ERR "Unable to determine destination " + "address.\n"); + goto cifs_parse_mount_err; + } + } + + /* set the port that we got earlier */ + cifs_set_port(dstaddr, port); if (uid_specified) vol->override_uid = override_uid; @@ -1843,7 +1917,7 @@ srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) } case AF_INET6: { struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; - struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; + struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); } default: @@ -1972,9 +2046,10 @@ match_security(struct TCP_Server_Info *server, struct smb_vol *vol) return true; } -static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, - struct smb_vol *vol) +static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) { + struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; + if ((server->vals != vol->vals) || (server->ops != vol->ops)) return 0; @@ -1995,13 +2070,13 @@ static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, } static struct TCP_Server_Info * -cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) +cifs_find_tcp_session(struct smb_vol *vol) { struct TCP_Server_Info *server; spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { - if (!match_server(server, addr, vol)) + if (!match_server(server, vol)) continue; ++server->srv_count; @@ -2051,40 +2126,12 @@ static struct TCP_Server_Info * cifs_get_tcp_session(struct smb_vol *volume_info) { struct TCP_Server_Info *tcp_ses = NULL; - struct sockaddr_storage addr; - struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; - struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; int rc; - memset(&addr, 0, sizeof(struct sockaddr_storage)); - - cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); - - if (volume_info->UNCip && volume_info->UNC) { - rc = cifs_fill_sockaddr((struct sockaddr *)&addr, - volume_info->UNCip, - strlen(volume_info->UNCip), - volume_info->port); - if (!rc) { - /* we failed translating address */ - rc = -EINVAL; - goto out_err; - } - } else if (volume_info->UNCip) { - /* BB using ip addr as tcp_ses name to connect to the - DFS root below */ - cERROR(1, "Connecting to DFS root not implemented yet"); - rc = -EINVAL; - goto out_err; - } else /* which tcp_sess DFS root would we conect to */ { - cERROR(1, "CIFS mount error: No UNC path (e.g. -o " - "unc=//192.168.1.100/public) specified"); - rc = -EINVAL; - goto out_err; - } + cFYI(1, "UNC: %s", volume_info->UNC); /* see if we already have a matching tcp_ses */ - tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); + tcp_ses = cifs_find_tcp_session(volume_info); if (tcp_ses) return tcp_ses; @@ -2129,27 +2176,18 @@ cifs_get_tcp_session(struct smb_vol *volume_info) INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); INIT_LIST_HEAD(&tcp_ses->smb_ses_list); INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); - + memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, + sizeof(tcp_ses->srcaddr)); + memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, + sizeof(tcp_ses->dstaddr)); /* * at this point we are the only ones with the pointer * to the struct since the kernel thread not created yet * no need to spinlock this init of tcpStatus or srv_count */ tcp_ses->tcpStatus = CifsNew; - memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, - sizeof(tcp_ses->srcaddr)); ++tcp_ses->srv_count; - if (addr.ss_family == AF_INET6) { - cFYI(1, "attempting ipv6 connect"); - /* BB should we allow ipv6 on port 139? */ - /* other OS never observed in Wild doing 139 with v6 */ - memcpy(&tcp_ses->dstaddr, sin_server6, - sizeof(struct sockaddr_in6)); - } else - memcpy(&tcp_ses->dstaddr, sin_server, - sizeof(struct sockaddr_in)); - rc = ip_connect(tcp_ses); if (rc < 0) { cERROR(1, "Error connecting to socket. Aborting operation"); @@ -2397,8 +2435,6 @@ cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), } #endif /* CONFIG_KEYS */ -static bool warned_on_ntlm; /* globals init to false automatically */ - static struct cifs_ses * cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) { @@ -2475,14 +2511,6 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) ses->cred_uid = volume_info->cred_uid; ses->linux_uid = volume_info->linux_uid; - /* ntlmv2 is much stronger than ntlm security, and has been broadly - supported for many years, time to update default security mechanism */ - if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { - warned_on_ntlm = true; - cERROR(1, "default security mechanism requested. The default " - "security mechanism will be upgraded from ntlm to " - "ntlmv2 in kernel release 3.3"); - } ses->overrideSecFlg = volume_info->secFlg; mutex_lock(&ses->session_mutex); @@ -2598,13 +2626,6 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) } } - if (strchr(volume_info->UNC + 3, '\\') == NULL - && strchr(volume_info->UNC + 3, '/') == NULL) { - cERROR(1, "Missing share name"); - rc = -ENODEV; - goto out_fail; - } - /* * BB Do we need to wrap session_mutex around this TCon call and Unix * SetFS as we do on SessSetup and reconnect? @@ -2718,11 +2739,8 @@ cifs_match_super(struct super_block *sb, void *data) struct cifs_ses *ses; struct cifs_tcon *tcon; struct tcon_link *tlink; - struct sockaddr_storage addr; int rc = 0; - memset(&addr, 0, sizeof(struct sockaddr_storage)); - spin_lock(&cifs_tcp_ses_lock); cifs_sb = CIFS_SB(sb); tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); @@ -2736,17 +2754,7 @@ cifs_match_super(struct super_block *sb, void *data) volume_info = mnt_data->vol; - if (!volume_info->UNCip || !volume_info->UNC) - goto out; - - rc = cifs_fill_sockaddr((struct sockaddr *)&addr, - volume_info->UNCip, - strlen(volume_info->UNCip), - volume_info->port); - if (!rc) - goto out; - - if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || + if (!match_server(tcp_srv, volume_info) || !match_session(ses, volume_info) || !match_tcon(tcon, volume_info->UNC)) { rc = 0; @@ -3261,8 +3269,6 @@ cleanup_volume_info_contents(struct smb_vol *volume_info) { kfree(volume_info->username); kzfree(volume_info->password); - if (volume_info->UNCip != volume_info->UNC + 2) - kfree(volume_info->UNCip); kfree(volume_info->UNC); kfree(volume_info->domainname); kfree(volume_info->iocharset); @@ -3280,14 +3286,16 @@ cifs_cleanup_volume_info(struct smb_vol *volume_info) #ifdef CONFIG_CIFS_DFS_UPCALL -/* build_path_to_root returns full path to root when - * we do not have an exiting connection (tcon) */ +/* + * cifs_build_path_to_root returns full path to root when we do not have an + * exiting connection (tcon) + */ static char * build_unc_path_to_root(const struct smb_vol *vol, const struct cifs_sb_info *cifs_sb) { char *full_path, *pos; - unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; + unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); @@ -3298,6 +3306,7 @@ build_unc_path_to_root(const struct smb_vol *vol, pos = full_path + unc_len; if (pplen) { + *pos++ = CIFS_DIR_SEP(cifs_sb); strncpy(pos, vol->prepath, pplen); pos += pplen; } @@ -3353,7 +3362,6 @@ expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, mdata = NULL; } else { cleanup_volume_info_contents(volume_info); - memset(volume_info, '\0', sizeof(*volume_info)); rc = cifs_setup_volume_info(volume_info, mdata, fake_devname); } @@ -3375,7 +3383,6 @@ cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, if (cifs_parse_mount_options(mount_data, devname, volume_info)) return -EINVAL; - if (volume_info->nullauth) { cFYI(1, "Anonymous login"); kfree(volume_info->username); @@ -3412,7 +3419,7 @@ cifs_get_volume_info(char *mount_data, const char *devname) int rc; struct smb_vol *volume_info; - volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); + volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); if (!volume_info) return ERR_PTR(-ENOMEM); @@ -3537,8 +3544,10 @@ remote_path_check: rc = -ENOSYS; goto mount_fail_check; } - /* build_path_to_root works only when we have a valid tcon */ - full_path = build_path_to_root(volume_info, cifs_sb, tcon); + /* + * cifs_build_path_to_root works only when we have a valid tcon + */ + full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); if (full_path == NULL) { rc = -ENOMEM; goto mount_fail_check; diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 7c0a8128364..8719bbe0dcc 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -44,6 +44,38 @@ renew_parental_timestamps(struct dentry *direntry) } while (!IS_ROOT(direntry)); } +char * +cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, + struct cifs_tcon *tcon) +{ + int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; + int dfsplen; + char *full_path = NULL; + + /* if no prefix path, simply set path to the root of share to "" */ + if (pplen == 0) { + full_path = kzalloc(1, GFP_KERNEL); + return full_path; + } + + if (tcon->Flags & SMB_SHARE_IS_IN_DFS) + dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); + else + dfsplen = 0; + + full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); + if (full_path == NULL) + return full_path; + + if (dfsplen) + strncpy(full_path, tcon->treeName, dfsplen); + full_path[dfsplen] = CIFS_DIR_SEP(cifs_sb); + strncpy(full_path + dfsplen + 1, vol->prepath, pplen); + convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); + full_path[dfsplen + pplen] = 0; /* add trailing null */ + return full_path; +} + /* Note: caller must free return buffer */ char * build_path_from_dentry(struct dentry *direntry) @@ -398,7 +430,16 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry, * in network traffic in the other paths. */ if (!(oflags & O_CREAT)) { - struct dentry *res = cifs_lookup(inode, direntry, 0); + struct dentry *res; + + /* + * Check for hashed negative dentry. We have already revalidated + * the dentry and it is fine. No need to perform another lookup. + */ + if (!d_unhashed(direntry)) + return -ENOENT; + + res = cifs_lookup(inode, direntry, 0); if (IS_ERR(res)) return PTR_ERR(res); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index edb25b4bbb9..8ea6ca50a66 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -238,6 +238,23 @@ out: return rc; } +static bool +cifs_has_mand_locks(struct cifsInodeInfo *cinode) +{ + struct cifs_fid_locks *cur; + bool has_locks = false; + + down_read(&cinode->lock_sem); + list_for_each_entry(cur, &cinode->llist, llist) { + if (!list_empty(&cur->locks)) { + has_locks = true; + break; + } + } + up_read(&cinode->lock_sem); + return has_locks; +} + struct cifsFileInfo * cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, struct tcon_link *tlink, __u32 oplock) @@ -248,6 +265,7 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, struct cifsFileInfo *cfile; struct cifs_fid_locks *fdlocks; struct cifs_tcon *tcon = tlink_tcon(tlink); + struct TCP_Server_Info *server = tcon->ses->server; cfile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); if (cfile == NULL) @@ -276,12 +294,22 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, INIT_WORK(&cfile->oplock_break, cifs_oplock_break); mutex_init(&cfile->fh_mutex); + /* + * If the server returned a read oplock and we have mandatory brlocks, + * set oplock level to None. + */ + if (oplock == server->vals->oplock_read && + cifs_has_mand_locks(cinode)) { + cFYI(1, "Reset oplock val from read to None due to mand locks"); + oplock = 0; + } + spin_lock(&cifs_file_list_lock); - if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE) + if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE && oplock) oplock = fid->pending_open->oplock; list_del(&fid->pending_open->olist); - tlink_tcon(tlink)->ses->server->ops->set_fid(cfile, fid, oplock); + server->ops->set_fid(cfile, fid, oplock); list_add(&cfile->tlist, &tcon->openFileList); /* if readable file instance put first in list*/ @@ -505,16 +533,36 @@ out: return rc; } +static int cifs_push_posix_locks(struct cifsFileInfo *cfile); + /* * Try to reacquire byte range locks that were released when session - * to server was lost + * to server was lost. */ -static int cifs_relock_file(struct cifsFileInfo *cifsFile) +static int +cifs_relock_file(struct cifsFileInfo *cfile) { + struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb); + struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); int rc = 0; - /* BB list all locks open on this file and relock */ + /* we are going to update can_cache_brlcks here - need a write access */ + down_write(&cinode->lock_sem); + if (cinode->can_cache_brlcks) { + /* can cache locks - no need to push them */ + up_write(&cinode->lock_sem); + return rc; + } + + if (cap_unix(tcon->ses) && + (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && + ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) + rc = cifs_push_posix_locks(cfile); + else + rc = tcon->ses->server->ops->push_mand_locks(cfile); + up_write(&cinode->lock_sem); return rc; } @@ -739,10 +787,15 @@ cifs_del_lock_waiters(struct cifsLockInfo *lock) } } +#define CIFS_LOCK_OP 0 +#define CIFS_READ_OP 1 +#define CIFS_WRITE_OP 2 + +/* @rw_check : 0 - no op, 1 - read, 2 - write */ static bool cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset, __u64 length, __u8 type, struct cifsFileInfo *cfile, - struct cifsLockInfo **conf_lock, bool rw_check) + struct cifsLockInfo **conf_lock, int rw_check) { struct cifsLockInfo *li; struct cifsFileInfo *cur_cfile = fdlocks->cfile; @@ -752,9 +805,13 @@ cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset, if (offset + length <= li->offset || offset >= li->offset + li->length) continue; - if (rw_check && server->ops->compare_fids(cfile, cur_cfile) && - current->tgid == li->pid) - continue; + if (rw_check != CIFS_LOCK_OP && current->tgid == li->pid && + server->ops->compare_fids(cfile, cur_cfile)) { + /* shared lock prevents write op through the same fid */ + if (!(li->type & server->vals->shared_lock_type) || + rw_check != CIFS_WRITE_OP) + continue; + } if ((type & server->vals->shared_lock_type) && ((server->ops->compare_fids(cfile, cur_cfile) && current->tgid == li->pid) || type == li->type)) @@ -769,7 +826,7 @@ cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset, bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length, __u8 type, struct cifsLockInfo **conf_lock, - bool rw_check) + int rw_check) { bool rc = false; struct cifs_fid_locks *cur; @@ -805,7 +862,7 @@ cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length, down_read(&cinode->lock_sem); exist = cifs_find_lock_conflict(cfile, offset, length, type, - &conf_lock, false); + &conf_lock, CIFS_LOCK_OP); if (exist) { flock->fl_start = conf_lock->offset; flock->fl_end = conf_lock->offset + conf_lock->length - 1; @@ -852,7 +909,7 @@ try_again: down_write(&cinode->lock_sem); exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length, - lock->type, &conf_lock, false); + lock->type, &conf_lock, CIFS_LOCK_OP); if (!exist && cinode->can_cache_brlcks) { list_add_tail(&lock->llist, &cfile->llist->locks); up_write(&cinode->lock_sem); @@ -948,7 +1005,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) int rc = 0, stored_rc; struct cifsLockInfo *li, *tmp; struct cifs_tcon *tcon; - struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); unsigned int num, max_num, max_buf; LOCKING_ANDX_RANGE *buf, *cur; int types[] = {LOCKING_ANDX_LARGE_FILES, @@ -958,21 +1014,12 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) xid = get_xid(); tcon = tlink_tcon(cfile->tlink); - /* we are going to update can_cache_brlcks here - need a write access */ - down_write(&cinode->lock_sem); - if (!cinode->can_cache_brlcks) { - up_write(&cinode->lock_sem); - free_xid(xid); - return rc; - } - /* * Accessing maxBuf is racy with cifs_reconnect - need to store value * and check it for zero before using. */ max_buf = tcon->ses->server->maxBuf; if (!max_buf) { - up_write(&cinode->lock_sem); free_xid(xid); return -EINVAL; } @@ -981,7 +1028,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) sizeof(LOCKING_ANDX_RANGE); buf = kzalloc(max_num * sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL); if (!buf) { - up_write(&cinode->lock_sem); free_xid(xid); return -ENOMEM; } @@ -1018,9 +1064,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) } } - cinode->can_cache_brlcks = false; - up_write(&cinode->lock_sem); - kfree(buf); free_xid(xid); return rc; @@ -1043,7 +1086,6 @@ struct lock_to_push { static int cifs_push_posix_locks(struct cifsFileInfo *cfile) { - struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct file_lock *flock, **before; unsigned int count = 0, i = 0; @@ -1054,14 +1096,6 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) xid = get_xid(); - /* we are going to update can_cache_brlcks here - need a write access */ - down_write(&cinode->lock_sem); - if (!cinode->can_cache_brlcks) { - up_write(&cinode->lock_sem); - free_xid(xid); - return rc; - } - lock_flocks(); cifs_for_each_lock(cfile->dentry->d_inode, before) { if ((*before)->fl_flags & FL_POSIX) @@ -1127,9 +1161,6 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) } out: - cinode->can_cache_brlcks = false; - up_write(&cinode->lock_sem); - free_xid(xid); return rc; err_out: @@ -1144,14 +1175,27 @@ static int cifs_push_locks(struct cifsFileInfo *cfile) { struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb); + struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + int rc = 0; + + /* we are going to update can_cache_brlcks here - need a write access */ + down_write(&cinode->lock_sem); + if (!cinode->can_cache_brlcks) { + up_write(&cinode->lock_sem); + return rc; + } if (cap_unix(tcon->ses) && (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) - return cifs_push_posix_locks(cfile); + rc = cifs_push_posix_locks(cfile); + else + rc = tcon->ses->server->ops->push_mand_locks(cfile); - return tcon->ses->server->ops->push_mand_locks(cfile); + cinode->can_cache_brlcks = false; + up_write(&cinode->lock_sem); + return rc; } static void @@ -1406,6 +1450,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; + struct inode *inode = cfile->dentry->d_inode; if (posix_lck) { int posix_lock_type; @@ -1436,16 +1481,33 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, return -ENOMEM; rc = cifs_lock_add_if(cfile, lock, wait_flag); - if (rc < 0) + if (rc < 0) { kfree(lock); - if (rc <= 0) + return rc; + } + if (!rc) goto out; + /* + * Windows 7 server can delay breaking lease from read to None + * if we set a byte-range lock on a file - break it explicitly + * before sending the lock to the server to be sure the next + * read won't conflict with non-overlapted locks due to + * pagereading. + */ + if (!CIFS_I(inode)->clientCanCacheAll && + CIFS_I(inode)->clientCanCacheRead) { + cifs_invalidate_mapping(inode); + cFYI(1, "Set no oplock for inode=%p due to mand locks", + inode); + CIFS_I(inode)->clientCanCacheRead = false; + } + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, type, 1, 0, wait_flag); if (rc) { kfree(lock); - goto out; + return rc; } cifs_lock_add(cfile, lock); @@ -1794,7 +1856,6 @@ static int cifs_writepages(struct address_space *mapping, struct TCP_Server_Info *server; struct page *page; int rc = 0; - loff_t isize = i_size_read(mapping->host); /* * If wsize is smaller than the page cache size, default to writing @@ -1899,7 +1960,7 @@ retry: */ set_page_writeback(page); - if (page_offset(page) >= isize) { + if (page_offset(page) >= i_size_read(mapping->host)) { done = true; unlock_page(page); end_page_writeback(page); @@ -1932,7 +1993,8 @@ retry: wdata->offset = page_offset(wdata->pages[0]); wdata->pagesz = PAGE_CACHE_SIZE; wdata->tailsz = - min(isize - page_offset(wdata->pages[nr_pages - 1]), + min(i_size_read(mapping->host) - + page_offset(wdata->pages[nr_pages - 1]), (loff_t)PAGE_CACHE_SIZE); wdata->bytes = ((nr_pages - 1) * PAGE_CACHE_SIZE) + wdata->tailsz; @@ -2457,7 +2519,7 @@ cifs_writev(struct kiocb *iocb, const struct iovec *iov, down_read(&cinode->lock_sem); if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs), server->vals->exclusive_lock_type, NULL, - true)) { + CIFS_WRITE_OP)) { mutex_lock(&inode->i_mutex); rc = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos); @@ -2487,42 +2549,34 @@ cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, struct cifsFileInfo *cfile = (struct cifsFileInfo *) iocb->ki_filp->private_data; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + ssize_t written; -#ifdef CONFIG_CIFS_SMB2 - /* - * If we have an oplock for read and want to write a data to the file - * we need to store it in the page cache and then push it to the server - * to be sure the next read will get a valid data. - */ - if (!cinode->clientCanCacheAll && cinode->clientCanCacheRead) { - ssize_t written; - int rc; - - written = generic_file_aio_write(iocb, iov, nr_segs, pos); - rc = filemap_fdatawrite(inode->i_mapping); - if (rc) - return (ssize_t)rc; - - return written; + if (cinode->clientCanCacheAll) { + if (cap_unix(tcon->ses) && + (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) + && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) + return generic_file_aio_write(iocb, iov, nr_segs, pos); + return cifs_writev(iocb, iov, nr_segs, pos); } -#endif - /* * For non-oplocked files in strict cache mode we need to write the data * to the server exactly from the pos to pos+len-1 rather than flush all * affected pages because it may cause a error with mandatory locks on * these pages but not on the region from pos to ppos+len-1. */ - - if (!cinode->clientCanCacheAll) - return cifs_user_writev(iocb, iov, nr_segs, pos); - - if (cap_unix(tcon->ses) && - (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && - ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) - return generic_file_aio_write(iocb, iov, nr_segs, pos); - - return cifs_writev(iocb, iov, nr_segs, pos); + written = cifs_user_writev(iocb, iov, nr_segs, pos); + if (written > 0 && cinode->clientCanCacheRead) { + /* + * Windows 7 server can delay breaking level2 oplock if a write + * request comes - break it on the client to prevent reading + * an old data. + */ + cifs_invalidate_mapping(inode); + cFYI(1, "Set no oplock for inode=%p after a write operation", + inode); + cinode->clientCanCacheRead = false; + } + return written; } static struct cifs_readdata * @@ -2892,7 +2946,7 @@ cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, down_read(&cinode->lock_sem); if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs), tcon->ses->server->vals->shared_lock_type, - NULL, true)) + NULL, CIFS_READ_OP)) rc = generic_file_aio_read(iocb, iov, nr_segs, pos); up_read(&cinode->lock_sem); return rc; @@ -3527,6 +3581,13 @@ void cifs_oplock_break(struct work_struct *work) struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); int rc = 0; + if (!cinode->clientCanCacheAll && cinode->clientCanCacheRead && + cifs_has_mand_locks(cinode)) { + cFYI(1, "Reset oplock to None for inode=%p due to mand locks", + inode); + cinode->clientCanCacheRead = false; + } + if (inode && S_ISREG(inode->i_mode)) { if (cinode->clientCanCacheRead) break_lease(inode, O_RDONLY); @@ -3536,7 +3597,7 @@ void cifs_oplock_break(struct work_struct *work) if (cinode->clientCanCacheRead == 0) { rc = filemap_fdatawait(inode->i_mapping); mapping_set_error(inode->i_mapping, rc); - invalidate_remote_inode(inode); + cifs_invalidate_mapping(inode); } cFYI(1, "Oplock flush inode %p rc %d", inode, rc); } diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index afdff79651f..ed6208ff85a 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -1791,11 +1791,12 @@ int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, stat->ino = CIFS_I(inode)->uniqueid; /* - * If on a multiuser mount without unix extensions, and the admin hasn't - * overridden them, set the ownership to the fsuid/fsgid of the current - * process. + * If on a multiuser mount without unix extensions or cifsacl being + * enabled, and the admin hasn't overridden them, set the ownership + * to the fsuid/fsgid of the current process. */ if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && + !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && !tcon->unix_ext) { if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) stat->uid = current_fsuid(); diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c index d5ce9e26696..a82bc51fdc8 100644 --- a/fs/cifs/netmisc.c +++ b/fs/cifs/netmisc.c @@ -204,7 +204,7 @@ cifs_convert_address(struct sockaddr *dst, const char *src, int len) return rc; } -int +void cifs_set_port(struct sockaddr *addr, const unsigned short int port) { switch (addr->sa_family) { @@ -214,19 +214,7 @@ cifs_set_port(struct sockaddr *addr, const unsigned short int port) case AF_INET6: ((struct sockaddr_in6 *)addr)->sin6_port = htons(port); break; - default: - return 0; } - return 1; -} - -int -cifs_fill_sockaddr(struct sockaddr *dst, const char *src, int len, - const unsigned short int port) -{ - if (!cifs_convert_address(dst, src, len)) - return 0; - return cifs_set_port(dst, port); } /***************************************************************************** diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index f9b5d3d6cf3..cdd6ff48246 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -66,18 +66,21 @@ static inline void dump_cifs_file_struct(struct file *file, char *label) #endif /* DEBUG2 */ /* + * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT + * * Find the dentry that matches "name". If there isn't one, create one. If it's * a negative dentry or the uniqueid changed, then drop it and recreate it. */ -static struct dentry * -cifs_readdir_lookup(struct dentry *parent, struct qstr *name, +static void +cifs_prime_dcache(struct dentry *parent, struct qstr *name, struct cifs_fattr *fattr) { struct dentry *dentry, *alias; struct inode *inode; struct super_block *sb = parent->d_inode->i_sb; + struct cifs_sb_info *cifs_sb = CIFS_SB(sb); - cFYI(1, "For %s", name->name); + cFYI(1, "%s: for %s", __func__, name->name); if (parent->d_op && parent->d_op->d_hash) parent->d_op->d_hash(parent, parent->d_inode, name); @@ -86,35 +89,43 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name, dentry = d_lookup(parent, name); if (dentry) { + int err; + inode = dentry->d_inode; - /* update inode in place if i_ino didn't change */ - if (inode && CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) { - cifs_fattr_to_inode(inode, fattr); - return dentry; + if (inode) { + /* + * If we're generating inode numbers, then we don't + * want to clobber the existing one with the one that + * the readdir code created. + */ + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) + fattr->cf_uniqueid = CIFS_I(inode)->uniqueid; + + /* update inode in place if i_ino didn't change */ + if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) { + cifs_fattr_to_inode(inode, fattr); + goto out; + } } - d_drop(dentry); + err = d_invalidate(dentry); dput(dentry); + if (err) + return; } dentry = d_alloc(parent, name); - if (dentry == NULL) - return NULL; + if (!dentry) + return; inode = cifs_iget(sb, fattr); - if (!inode) { - dput(dentry); - return NULL; - } + if (!inode) + goto out; alias = d_materialise_unique(dentry, inode); - if (alias != NULL) { - dput(dentry); - if (IS_ERR(alias)) - return NULL; - dentry = alias; - } - - return dentry; + if (alias && !IS_ERR(alias)) + dput(alias); +out: + dput(dentry); } static void @@ -134,6 +145,16 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) if (fattr->cf_cifsattrs & ATTR_READONLY) fattr->cf_mode &= ~S_IWUGO; + /* + * We of course don't get ACL info in FIND_FIRST/NEXT results, so + * mark it for revalidation so that "ls -l" will look right. It might + * be super-slow, but if we don't do this then the ownership of files + * may look wrong since the inodes may not have timed out by the time + * "ls" does a stat() call on them. + */ + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) + fattr->cf_flags |= CIFS_FATTR_NEED_REVAL; + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL && fattr->cf_cifsattrs & ATTR_SYSTEM) { if (fattr->cf_eof == 0) { @@ -649,7 +670,6 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir, struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifs_dirent de = { NULL, }; struct cifs_fattr fattr; - struct dentry *dentry; struct qstr name; int rc = 0; ino_t ino; @@ -720,13 +740,11 @@ static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir, */ fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; - ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); - dentry = cifs_readdir_lookup(file->f_dentry, &name, &fattr); + cifs_prime_dcache(file->f_dentry, &name, &fattr); + ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid); rc = filldir(dirent, name.name, name.len, file->f_pos, ino, fattr.cf_dtype); - - dput(dentry); return rc; } diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index 56cc4be8780..47bc5a87f94 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -53,6 +53,13 @@ send_nt_cancel(struct TCP_Server_Info *server, void *buf, mutex_unlock(&server->srv_mutex); return rc; } + + /* + * The response to this call was already factored into the sequence + * number when the call went out, so we must adjust it back downward + * after signing here. + */ + --server->sequence_number; rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length)); mutex_unlock(&server->srv_mutex); @@ -575,37 +582,6 @@ cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data); } -static char * -cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, - struct cifs_tcon *tcon) -{ - int pplen = vol->prepath ? strlen(vol->prepath) : 0; - int dfsplen; - char *full_path = NULL; - - /* if no prefix path, simply set path to the root of share to "" */ - if (pplen == 0) { - full_path = kzalloc(1, GFP_KERNEL); - return full_path; - } - - if (tcon->Flags & SMB_SHARE_IS_IN_DFS) - dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); - else - dfsplen = 0; - - full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); - if (full_path == NULL) - return full_path; - - if (dfsplen) - strncpy(full_path, tcon->treeName, dfsplen); - strncpy(full_path + dfsplen, vol->prepath, pplen); - convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); - full_path[dfsplen + pplen] = 0; /* add trailing null */ - return full_path; -} - static void cifs_clear_stats(struct cifs_tcon *tcon) { @@ -766,7 +742,6 @@ smb_set_file_info(struct inode *inode, const char *full_path, struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct tcon_link *tlink = NULL; struct cifs_tcon *tcon; - FILE_BASIC_INFO info_buf; /* if the file is already open for write, just use that fileid */ open_file = find_writable_file(cinode, true); @@ -817,7 +792,7 @@ smb_set_file_info(struct inode *inode, const char *full_path, netpid = current->tgid; set_via_filehandle: - rc = CIFSSMBSetFileInfo(xid, tcon, &info_buf, netfid, netpid); + rc = CIFSSMBSetFileInfo(xid, tcon, buf, netfid, netpid); if (!rc) cinode->cifsAttrs = le32_to_cpu(buf->Attributes); @@ -944,7 +919,6 @@ struct smb_version_operations smb1_operations = { .set_path_size = CIFSSMBSetEOF, .set_file_size = CIFSSMBSetFileSize, .set_file_info = smb_set_file_info, - .build_path_to_root = cifs_build_path_to_root, .echo = CIFSSMBEcho, .mkdir = CIFSSMBMkDir, .mkdir_setinfo = cifs_mkdir_setinfo, @@ -985,4 +959,5 @@ struct smb_version_values smb1_values = { .cap_unix = CAP_UNIX, .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND, .cap_large_files = CAP_LARGE_FILES, + .oplock_read = OPLOCK_READ, }; diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c index a93eec30a50..71e6aed4b38 100644 --- a/fs/cifs/smb2file.c +++ b/fs/cifs/smb2file.c @@ -260,13 +260,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile) struct cifs_fid_locks *fdlocks; xid = get_xid(); - /* we are going to update can_cache_brlcks here - need a write access */ - down_write(&cinode->lock_sem); - if (!cinode->can_cache_brlcks) { - up_write(&cinode->lock_sem); - free_xid(xid); - return rc; - } /* * Accessing maxBuf is racy with cifs_reconnect - need to store value @@ -274,7 +267,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile) */ max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf; if (!max_buf) { - up_write(&cinode->lock_sem); free_xid(xid); return -EINVAL; } @@ -282,7 +274,6 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile) max_num = max_buf / sizeof(struct smb2_lock_element); buf = kzalloc(max_num * sizeof(struct smb2_lock_element), GFP_KERNEL); if (!buf) { - up_write(&cinode->lock_sem); free_xid(xid); return -ENOMEM; } @@ -293,10 +284,7 @@ smb2_push_mandatory_locks(struct cifsFileInfo *cfile) rc = stored_rc; } - cinode->can_cache_brlcks = false; kfree(buf); - - up_write(&cinode->lock_sem); free_xid(xid); return rc; } diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 4d9dbe0b738..c9c7aa7ed96 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -262,23 +262,6 @@ smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, return rc; } -static char * -smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, - struct cifs_tcon *tcon) -{ - int pplen = vol->prepath ? strlen(vol->prepath) : 0; - char *full_path = NULL; - - /* if no prefix path, simply set path to the root of share to "" */ - if (pplen == 0) { - full_path = kzalloc(2, GFP_KERNEL); - return full_path; - } - - cERROR(1, "prefixpath is not supported for SMB2 now"); - return NULL; -} - static bool smb2_can_echo(struct TCP_Server_Info *server) { @@ -613,7 +596,6 @@ struct smb_version_operations smb21_operations = { .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, - .build_path_to_root = smb2_build_path_to_root, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .rmdir = smb2_rmdir, @@ -641,6 +623,92 @@ struct smb_version_operations smb21_operations = { .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, + .calc_signature = smb2_calc_signature, +}; + + +struct smb_version_operations smb30_operations = { + .compare_fids = smb2_compare_fids, + .setup_request = smb2_setup_request, + .setup_async_request = smb2_setup_async_request, + .check_receive = smb2_check_receive, + .add_credits = smb2_add_credits, + .set_credits = smb2_set_credits, + .get_credits_field = smb2_get_credits_field, + .get_credits = smb2_get_credits, + .get_next_mid = smb2_get_next_mid, + .read_data_offset = smb2_read_data_offset, + .read_data_length = smb2_read_data_length, + .map_error = map_smb2_to_linux_error, + .find_mid = smb2_find_mid, + .check_message = smb2_check_message, + .dump_detail = smb2_dump_detail, + .clear_stats = smb2_clear_stats, + .print_stats = smb2_print_stats, + .is_oplock_break = smb2_is_valid_oplock_break, + .need_neg = smb2_need_neg, + .negotiate = smb2_negotiate, + .negotiate_wsize = smb2_negotiate_wsize, + .negotiate_rsize = smb2_negotiate_rsize, + .sess_setup = SMB2_sess_setup, + .logoff = SMB2_logoff, + .tree_connect = SMB2_tcon, + .tree_disconnect = SMB2_tdis, + .is_path_accessible = smb2_is_path_accessible, + .can_echo = smb2_can_echo, + .echo = SMB2_echo, + .query_path_info = smb2_query_path_info, + .get_srv_inum = smb2_get_srv_inum, + .query_file_info = smb2_query_file_info, + .set_path_size = smb2_set_path_size, + .set_file_size = smb2_set_file_size, + .set_file_info = smb2_set_file_info, + .mkdir = smb2_mkdir, + .mkdir_setinfo = smb2_mkdir_setinfo, + .rmdir = smb2_rmdir, + .unlink = smb2_unlink, + .rename = smb2_rename_path, + .create_hardlink = smb2_create_hardlink, + .open = smb2_open_file, + .set_fid = smb2_set_fid, + .close = smb2_close_file, + .flush = smb2_flush_file, + .async_readv = smb2_async_readv, + .async_writev = smb2_async_writev, + .sync_read = smb2_sync_read, + .sync_write = smb2_sync_write, + .query_dir_first = smb2_query_dir_first, + .query_dir_next = smb2_query_dir_next, + .close_dir = smb2_close_dir, + .calc_smb_size = smb2_calc_size, + .is_status_pending = smb2_is_status_pending, + .oplock_response = smb2_oplock_response, + .queryfs = smb2_queryfs, + .mand_lock = smb2_mand_lock, + .mand_unlock_range = smb2_unlock_range, + .push_mand_locks = smb2_push_mandatory_locks, + .get_lease_key = smb2_get_lease_key, + .set_lease_key = smb2_set_lease_key, + .new_lease_key = smb2_new_lease_key, + .calc_signature = smb3_calc_signature, +}; + +struct smb_version_values smb20_values = { + .version_string = SMB20_VERSION_STRING, + .protocol_id = SMB20_PROT_ID, + .req_capabilities = 0, /* MBZ */ + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK, + .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp) - 1, + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, + .oplock_read = SMB2_OPLOCK_LEVEL_II, }; struct smb_version_values smb21_values = { @@ -658,6 +726,7 @@ struct smb_version_values smb21_values = { .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, + .oplock_read = SMB2_OPLOCK_LEVEL_II, }; struct smb_version_values smb30_values = { diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index cf33622cdac..41d9d0725f0 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -425,7 +425,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) } cFYI(1, "sec_flags 0x%x", sec_flags); - if (sec_flags & CIFSSEC_MUST_SIGN) { + if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) { cFYI(1, "Signing required"); if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED | SMB2_NEGOTIATE_SIGNING_ENABLED))) { @@ -612,7 +612,8 @@ ssetup_ntlmssp_authenticate: /* BB add code to build os and lm fields */ - rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, CIFS_LOG_ERROR); + rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, + CIFS_LOG_ERROR | CIFS_NEG_OP); kfree(security_blob); rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h index 7d25f8b14f9..2aa3535e38c 100644 --- a/fs/cifs/smb2proto.h +++ b/fs/cifs/smb2proto.h @@ -47,6 +47,10 @@ extern struct mid_q_entry *smb2_setup_request(struct cifs_ses *ses, struct smb_rqst *rqst); extern struct mid_q_entry *smb2_setup_async_request( struct TCP_Server_Info *server, struct smb_rqst *rqst); +extern int smb2_calc_signature(struct smb_rqst *rqst, + struct TCP_Server_Info *server); +extern int smb3_calc_signature(struct smb_rqst *rqst, + struct TCP_Server_Info *server); extern void smb2_echo_request(struct work_struct *work); extern __le32 smb2_get_lease_state(struct cifsInodeInfo *cinode); extern __u8 smb2_map_lease_to_oplock(__le32 lease_state); diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c index 2a5fdf26f79..8dd73e61d76 100644 --- a/fs/cifs/smb2transport.c +++ b/fs/cifs/smb2transport.c @@ -39,7 +39,7 @@ #include "smb2status.h" #include "smb2glob.h" -static int +int smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) { int i, rc; @@ -116,6 +116,13 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) return rc; } +int +smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) +{ + cFYI(1, "smb3 signatures not supported yet"); + return -EOPNOTSUPP; +} + /* must be called with server->srv_mutex held */ static int smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server) @@ -132,7 +139,7 @@ smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server) return rc; } - rc = smb2_calc_signature(rqst, server); + rc = server->ops->calc_signature(rqst, server); return rc; } @@ -168,7 +175,7 @@ smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) memset(smb2_pdu->Signature, 0, SMB2_SIGNATURE_SIZE); mutex_lock(&server->srv_mutex); - rc = smb2_calc_signature(rqst, server); + rc = server->ops->calc_signature(rqst, server); mutex_unlock(&server->srv_mutex); if (rc) diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 76d974c952f..1a528680ec5 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -144,9 +144,6 @@ smb_send_kvec(struct TCP_Server_Info *server, struct kvec *iov, size_t n_vec, *sent = 0; - if (ssocket == NULL) - return -ENOTSOCK; /* BB eventually add reconnect code here */ - smb_msg.msg_name = (struct sockaddr *) &server->dstaddr; smb_msg.msg_namelen = sizeof(struct sockaddr); smb_msg.msg_control = NULL; @@ -291,6 +288,9 @@ smb_send_rqst(struct TCP_Server_Info *server, struct smb_rqst *rqst) struct socket *ssocket = server->ssocket; int val = 1; + if (ssocket == NULL) + return -ENOTSOCK; + cFYI(1, "Sending smb: smb_len=%u", smb_buf_length); dump_smb(iov[0].iov_base, iov[0].iov_len); diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 4c6285fff59..e2f57a00702 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -844,6 +844,9 @@ COMPATIBLE_IOCTL(TIOCGDEV) COMPATIBLE_IOCTL(TIOCCBRK) COMPATIBLE_IOCTL(TIOCGSID) COMPATIBLE_IOCTL(TIOCGICOUNT) +COMPATIBLE_IOCTL(TIOCGPKT) +COMPATIBLE_IOCTL(TIOCGPTLCK) +COMPATIBLE_IOCTL(TIOCGEXCL) /* Little t */ COMPATIBLE_IOCTL(TIOCGETD) COMPATIBLE_IOCTL(TIOCSETD) diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c index 7414ae24a79..712b10f64c7 100644 --- a/fs/configfs/dir.c +++ b/fs/configfs/dir.c @@ -1613,12 +1613,12 @@ static int configfs_readdir(struct file * filp, void * dirent, filldir_t filldir return 0; } -static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin) +static loff_t configfs_dir_lseek(struct file *file, loff_t offset, int whence) { struct dentry * dentry = file->f_path.dentry; mutex_lock(&dentry->d_inode->i_mutex); - switch (origin) { + switch (whence) { case 1: offset += file->f_pos; case 0: diff --git a/fs/coredump.c b/fs/coredump.c index ce47379bfa6..177493272a6 100644 --- a/fs/coredump.c +++ b/fs/coredump.c @@ -458,7 +458,7 @@ static int umh_pipe_setup(struct subprocess_info *info, struct cred *new) return err; } -void do_coredump(siginfo_t *siginfo, struct pt_regs *regs) +void do_coredump(siginfo_t *siginfo) { struct core_state core_state; struct core_name cn; @@ -474,7 +474,7 @@ void do_coredump(siginfo_t *siginfo, struct pt_regs *regs) static atomic_t core_dump_count = ATOMIC_INIT(0); struct coredump_params cprm = { .siginfo = siginfo, - .regs = regs, + .regs = signal_pt_regs(), .limit = rlimit(RLIMIT_CORE), /* * We must use the same mm->flags while dumping core to avoid diff --git a/fs/dcache.c b/fs/dcache.c index 3a463d0c4fe..19153a0a810 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -455,24 +455,6 @@ void d_drop(struct dentry *dentry) EXPORT_SYMBOL(d_drop); /* - * d_clear_need_lookup - drop a dentry from cache and clear the need lookup flag - * @dentry: dentry to drop - * - * This is called when we do a lookup on a placeholder dentry that needed to be - * looked up. The dentry should have been hashed in order for it to be found by - * the lookup code, but now needs to be unhashed while we do the actual lookup - * and clear the DCACHE_NEED_LOOKUP flag. - */ -void d_clear_need_lookup(struct dentry *dentry) -{ - spin_lock(&dentry->d_lock); - __d_drop(dentry); - dentry->d_flags &= ~DCACHE_NEED_LOOKUP; - spin_unlock(&dentry->d_lock); -} -EXPORT_SYMBOL(d_clear_need_lookup); - -/* * Finish off a dentry we've decided to kill. * dentry->d_lock must be held, returns with it unlocked. * If ref is non-zero, then decrement the refcount too. @@ -565,13 +547,7 @@ repeat: if (d_unhashed(dentry)) goto kill_it; - /* - * If this dentry needs lookup, don't set the referenced flag so that it - * is more likely to be cleaned up by the dcache shrinker in case of - * memory pressure. - */ - if (!d_need_lookup(dentry)) - dentry->d_flags |= DCACHE_REFERENCED; + dentry->d_flags |= DCACHE_REFERENCED; dentry_lru_add(dentry); dentry->d_count--; @@ -1583,7 +1559,7 @@ EXPORT_SYMBOL(d_find_any_alias); */ struct dentry *d_obtain_alias(struct inode *inode) { - static const struct qstr anonstring = { .name = "" }; + static const struct qstr anonstring = QSTR_INIT("/", 1); struct dentry *tmp; struct dentry *res; @@ -1737,13 +1713,6 @@ struct dentry *d_add_ci(struct dentry *dentry, struct inode *inode, } /* - * We are going to instantiate this dentry, unhash it and clear the - * lookup flag so we can do that. - */ - if (unlikely(d_need_lookup(found))) - d_clear_need_lookup(found); - - /* * Negative dentry: instantiate it unless the inode is a directory and * already has a dentry. */ diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index b607d92cdf2..a5f12b7e228 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -59,7 +59,6 @@ static struct inode *debugfs_get_inode(struct super_block *sb, umode_t mode, dev case S_IFDIR: inode->i_op = &simple_dir_inode_operations; inode->i_fop = &simple_dir_operations; - inode->i_private = NULL; /* directory inodes start off with i_nlink == 2 * (for "." entry) */ @@ -177,7 +176,7 @@ static int debugfs_parse_options(char *data, struct debugfs_mount_opts *opts) opts->uid = uid; break; case Opt_gid: - if (match_octal(&args[0], &option)) + if (match_int(&args[0], &option)) return -EINVAL; gid = make_kgid(current_user_ns(), option); if (!gid_valid(gid)) diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index 14afbabe654..472e6befc54 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -545,37 +545,38 @@ void devpts_kill_index(struct inode *ptmx_inode, int idx) mutex_unlock(&allocated_ptys_lock); } -int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty) +/** + * devpts_pty_new -- create a new inode in /dev/pts/ + * @ptmx_inode: inode of the master + * @device: major+minor of the node to be created + * @index: used as a name of the node + * @priv: what's given back by devpts_get_priv + * + * The created inode is returned. Remove it from /dev/pts/ by devpts_pty_kill. + */ +struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index, + void *priv) { - /* tty layer puts index from devpts_new_index() in here */ - int number = tty->index; - struct tty_driver *driver = tty->driver; - dev_t device = MKDEV(driver->major, driver->minor_start+number); struct dentry *dentry; struct super_block *sb = pts_sb_from_inode(ptmx_inode); - struct inode *inode = new_inode(sb); + struct inode *inode; struct dentry *root = sb->s_root; struct pts_fs_info *fsi = DEVPTS_SB(sb); struct pts_mount_opts *opts = &fsi->mount_opts; - int ret = 0; char s[12]; - /* We're supposed to be given the slave end of a pty */ - BUG_ON(driver->type != TTY_DRIVER_TYPE_PTY); - BUG_ON(driver->subtype != PTY_TYPE_SLAVE); - + inode = new_inode(sb); if (!inode) - return -ENOMEM; + return ERR_PTR(-ENOMEM); - inode->i_ino = number + 3; + inode->i_ino = index + 3; inode->i_uid = opts->setuid ? opts->uid : current_fsuid(); inode->i_gid = opts->setgid ? opts->gid : current_fsgid(); inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; init_special_inode(inode, S_IFCHR|opts->mode, device); - inode->i_private = tty; - tty->driver_data = inode; + inode->i_private = priv; - sprintf(s, "%d", number); + sprintf(s, "%d", index); mutex_lock(&root->d_inode->i_mutex); @@ -585,18 +586,24 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty) fsnotify_create(root->d_inode, dentry); } else { iput(inode); - ret = -ENOMEM; + inode = ERR_PTR(-ENOMEM); } mutex_unlock(&root->d_inode->i_mutex); - return ret; + return inode; } -struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number) +/** + * devpts_get_priv -- get private data for a slave + * @pts_inode: inode of the slave + * + * Returns whatever was passed as priv in devpts_pty_new for a given inode. + */ +void *devpts_get_priv(struct inode *pts_inode) { struct dentry *dentry; - struct tty_struct *tty; + void *priv = NULL; BUG_ON(pts_inode->i_rdev == MKDEV(TTYAUX_MAJOR, PTMX_MINOR)); @@ -605,18 +612,22 @@ struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number) if (!dentry) return NULL; - tty = NULL; if (pts_inode->i_sb->s_magic == DEVPTS_SUPER_MAGIC) - tty = (struct tty_struct *)pts_inode->i_private; + priv = pts_inode->i_private; dput(dentry); - return tty; + return priv; } -void devpts_pty_kill(struct tty_struct *tty) +/** + * devpts_pty_kill -- remove inode form /dev/pts/ + * @inode: inode of the slave to be removed + * + * This is an inverse operation of devpts_pty_new. + */ +void devpts_pty_kill(struct inode *inode) { - struct inode *inode = tty->driver_data; struct super_block *sb = pts_sb_from_inode(inode); struct dentry *root = sb->s_root; struct dentry *dentry; diff --git a/fs/direct-io.c b/fs/direct-io.c index f86c720dba0..cf5b44b10c6 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -540,6 +540,7 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio, sector_t fs_endblk; /* Into file, in filesystem-sized blocks */ unsigned long fs_count; /* Number of filesystem-sized blocks */ int create; + unsigned int i_blkbits = sdio->blkbits + sdio->blkfactor; /* * If there was a memory error and we've overwritten all the @@ -554,7 +555,7 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio, fs_count = fs_endblk - fs_startblk + 1; map_bh->b_state = 0; - map_bh->b_size = fs_count << dio->inode->i_blkbits; + map_bh->b_size = fs_count << i_blkbits; /* * For writes inside i_size on a DIO_SKIP_HOLES filesystem we @@ -1053,7 +1054,8 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, int seg; size_t size; unsigned long addr; - unsigned blkbits = inode->i_blkbits; + unsigned i_blkbits = ACCESS_ONCE(inode->i_blkbits); + unsigned blkbits = i_blkbits; unsigned blocksize_mask = (1 << blkbits) - 1; ssize_t retval = -EINVAL; loff_t end = offset; @@ -1149,7 +1151,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, dio->inode = inode; dio->rw = rw; sdio.blkbits = blkbits; - sdio.blkfactor = inode->i_blkbits - blkbits; + sdio.blkfactor = i_blkbits - blkbits; sdio.block_in_file = offset >> blkbits; sdio.get_block = get_block; diff --git a/fs/dlm/Kconfig b/fs/dlm/Kconfig index 1897eb1b4b6..e4242c3f848 100644 --- a/fs/dlm/Kconfig +++ b/fs/dlm/Kconfig @@ -1,6 +1,6 @@ menuconfig DLM tristate "Distributed Lock Manager (DLM)" - depends on EXPERIMENTAL && INET + depends on INET depends on SYSFS && CONFIGFS_FS && (IPV6 || IPV6=n) select IP_SCTP help diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h index 871c1abf602..77c0f70f8fe 100644 --- a/fs/dlm/dlm_internal.h +++ b/fs/dlm/dlm_internal.h @@ -337,6 +337,7 @@ enum rsb_flags { RSB_NEW_MASTER2, RSB_RECOVER_CONVERT, RSB_RECOVER_GRANT, + RSB_RECOVER_LVB_INVAL, }; static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index b5695075818..a579f30f237 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -5393,6 +5393,13 @@ static void purge_dead_list(struct dlm_ls *ls, struct dlm_rsb *r, if ((lkb->lkb_nodeid == nodeid_gone) || dlm_is_removed(ls, lkb->lkb_nodeid)) { + /* tell recover_lvb to invalidate the lvb + because a node holding EX/PW failed */ + if ((lkb->lkb_exflags & DLM_LKF_VALBLK) && + (lkb->lkb_grmode >= DLM_LOCK_PW)) { + rsb_set_flag(r, RSB_RECOVER_LVB_INVAL); + } + del_lkb(r, lkb); /* this put should free the lkb */ @@ -6025,15 +6032,18 @@ static int orphan_proc_lock(struct dlm_ls *ls, struct dlm_lkb *lkb) return error; } -/* The force flag allows the unlock to go ahead even if the lkb isn't granted. - Regardless of what rsb queue the lock is on, it's removed and freed. */ +/* The FORCEUNLOCK flag allows the unlock to go ahead even if the lkb isn't + granted. Regardless of what rsb queue the lock is on, it's removed and + freed. The IVVALBLK flag causes the lvb on the resource to be invalidated + if our lock is PW/EX (it's ignored if our granted mode is smaller.) */ static int unlock_proc_lock(struct dlm_ls *ls, struct dlm_lkb *lkb) { struct dlm_args args; int error; - set_unlock_args(DLM_LKF_FORCEUNLOCK, lkb->lkb_ua, &args); + set_unlock_args(DLM_LKF_FORCEUNLOCK | DLM_LKF_IVVALBLK, + lkb->lkb_ua, &args); error = unlock_lock(ls, lkb, &args); if (error == -DLM_EUNLOCK) diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 331ea4f94ef..dd87a31bcc2 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -1385,7 +1385,6 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc) struct connection *con; struct writequeue_entry *e; int offset = 0; - int users = 0; con = nodeid2con(nodeid, allocation); if (!con) @@ -1399,7 +1398,7 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc) } else { offset = e->end; e->end += len; - users = e->users++; + e->users++; } spin_unlock(&con->writequeue_lock); @@ -1414,7 +1413,7 @@ void *dlm_lowcomms_get_buffer(int nodeid, int len, gfp_t allocation, char **ppc) spin_lock(&con->writequeue_lock); offset = e->end; e->end += len; - users = e->users++; + e->users++; list_add_tail(&e->list, &con->writequeue); spin_unlock(&con->writequeue_lock); goto got_one; diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c index 4a7a76e42fc..aedea28a86a 100644 --- a/fs/dlm/recover.c +++ b/fs/dlm/recover.c @@ -717,8 +717,14 @@ void dlm_recovered_lock(struct dlm_rsb *r) * the VALNOTVALID flag if necessary, and determining the correct lvb contents * based on the lvb's of the locks held on the rsb. * - * RSB_VALNOTVALID is set if there are only NL/CR locks on the rsb. If it - * was already set prior to recovery, it's not cleared, regardless of locks. + * RSB_VALNOTVALID is set in two cases: + * + * 1. we are master, but not new, and we purged an EX/PW lock held by a + * failed node (in dlm_recover_purge which set RSB_RECOVER_LVB_INVAL) + * + * 2. we are a new master, and there are only NL/CR locks left. + * (We could probably improve this by only invaliding in this way when + * the previous master left uncleanly. VMS docs mention that.) * * The LVB contents are only considered for changing when this is a new master * of the rsb (NEW_MASTER2). Then, the rsb's lvb is taken from any lkb with @@ -734,6 +740,19 @@ static void recover_lvb(struct dlm_rsb *r) int big_lock_exists = 0; int lvblen = r->res_ls->ls_lvblen; + if (!rsb_flag(r, RSB_NEW_MASTER2) && + rsb_flag(r, RSB_RECOVER_LVB_INVAL)) { + /* case 1 above */ + rsb_set_flag(r, RSB_VALNOTVALID); + return; + } + + if (!rsb_flag(r, RSB_NEW_MASTER2)) + return; + + /* we are the new master, so figure out if VALNOTVALID should + be set, and set the rsb lvb from the best lkb available. */ + list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) { if (!(lkb->lkb_exflags & DLM_LKF_VALBLK)) continue; @@ -772,13 +791,10 @@ static void recover_lvb(struct dlm_rsb *r) if (!lock_lvb_exists) goto out; + /* lvb is invalidated if only NL/CR locks remain */ if (!big_lock_exists) rsb_set_flag(r, RSB_VALNOTVALID); - /* don't mess with the lvb unless we're the new master */ - if (!rsb_flag(r, RSB_NEW_MASTER2)) - goto out; - if (!r->res_lvbptr) { r->res_lvbptr = dlm_allocate_lvb(r->res_ls); if (!r->res_lvbptr) @@ -852,12 +868,19 @@ void dlm_recover_rsbs(struct dlm_ls *ls) if (is_master(r)) { if (rsb_flag(r, RSB_RECOVER_CONVERT)) recover_conversion(r); + + /* recover lvb before granting locks so the updated + lvb/VALNOTVALID is presented in the completion */ + recover_lvb(r); + if (rsb_flag(r, RSB_NEW_MASTER2)) recover_grant(r); - recover_lvb(r); count++; + } else { + rsb_clear_flag(r, RSB_VALNOTVALID); } rsb_clear_flag(r, RSB_RECOVER_CONVERT); + rsb_clear_flag(r, RSB_RECOVER_LVB_INVAL); rsb_clear_flag(r, RSB_NEW_MASTER2); unlock_rsb(r); } diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index ea993128155..a7b0c2dfb3d 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -1935,7 +1935,7 @@ static const unsigned char filename_rev_map[256] = { * @src: Source location for the filename to encode * @src_size: Size of the source in bytes */ -void ecryptfs_encode_for_filename(unsigned char *dst, size_t *dst_size, +static void ecryptfs_encode_for_filename(unsigned char *dst, size_t *dst_size, unsigned char *src, size_t src_size) { size_t num_blocks; diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c index 809e67d05ca..f1ea610362c 100644 --- a/fs/ecryptfs/kthread.c +++ b/fs/ecryptfs/kthread.c @@ -102,12 +102,12 @@ int __init ecryptfs_init_kthread(void) void ecryptfs_destroy_kthread(void) { - struct ecryptfs_open_req *req; + struct ecryptfs_open_req *req, *tmp; mutex_lock(&ecryptfs_kthread_ctl.mux); ecryptfs_kthread_ctl.flags |= ECRYPTFS_KTHREAD_ZOMBIE; - list_for_each_entry(req, &ecryptfs_kthread_ctl.req_list, - kthread_ctl_list) { + list_for_each_entry_safe(req, tmp, &ecryptfs_kthread_ctl.req_list, + kthread_ctl_list) { list_del(&req->kthread_ctl_list); *req->lower_file = ERR_PTR(-EIO); complete(&req->done); diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c index bd1d57f98f7..564a1fa34b9 100644 --- a/fs/ecryptfs/mmap.c +++ b/fs/ecryptfs/mmap.c @@ -338,7 +338,8 @@ static int ecryptfs_write_begin(struct file *file, if (prev_page_end_size >= i_size_read(page->mapping->host)) { zero_user(page, 0, PAGE_CACHE_SIZE); - } else { + SetPageUptodate(page); + } else if (len < PAGE_CACHE_SIZE) { rc = ecryptfs_decrypt_page(page); if (rc) { printk(KERN_ERR "%s: Error decrypting " @@ -348,8 +349,8 @@ static int ecryptfs_write_begin(struct file *file, ClearPageUptodate(page); goto out; } + SetPageUptodate(page); } - SetPageUptodate(page); } } /* If creating a page or more of holes, zero them out via truncate. @@ -499,6 +500,13 @@ static int ecryptfs_write_end(struct file *file, } goto out; } + if (!PageUptodate(page)) { + if (copied < PAGE_CACHE_SIZE) { + rc = 0; + goto out; + } + SetPageUptodate(page); + } /* Fills in zeros if 'to' goes beyond inode size */ rc = fill_zeros_to_end_of_page(page, to); if (rc) { diff --git a/fs/eventfd.c b/fs/eventfd.c index d81b9f65408..35470d9b96e 100644 --- a/fs/eventfd.c +++ b/fs/eventfd.c @@ -19,6 +19,8 @@ #include <linux/export.h> #include <linux/kref.h> #include <linux/eventfd.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> struct eventfd_ctx { struct kref kref; @@ -284,7 +286,25 @@ static ssize_t eventfd_write(struct file *file, const char __user *buf, size_t c return res; } +#ifdef CONFIG_PROC_FS +static int eventfd_show_fdinfo(struct seq_file *m, struct file *f) +{ + struct eventfd_ctx *ctx = f->private_data; + int ret; + + spin_lock_irq(&ctx->wqh.lock); + ret = seq_printf(m, "eventfd-count: %16llx\n", + (unsigned long long)ctx->count); + spin_unlock_irq(&ctx->wqh.lock); + + return ret; +} +#endif + static const struct file_operations eventfd_fops = { +#ifdef CONFIG_PROC_FS + .show_fdinfo = eventfd_show_fdinfo, +#endif .release = eventfd_release, .poll = eventfd_poll, .read = eventfd_read, diff --git a/fs/eventpoll.c b/fs/eventpoll.c index da72250ddc1..9fec1836057 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -38,6 +38,8 @@ #include <asm/io.h> #include <asm/mman.h> #include <linux/atomic.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> /* * LOCKING: @@ -346,7 +348,7 @@ static inline struct epitem *ep_item_from_epqueue(poll_table *p) /* Tells if the epoll_ctl(2) operation needs an event copy from userspace */ static inline int ep_op_has_event(int op) { - return op == EPOLL_CTL_ADD || op == EPOLL_CTL_MOD; + return op != EPOLL_CTL_DEL; } /* Initialize the poll safe wake up structure */ @@ -676,34 +678,6 @@ static int ep_remove(struct eventpoll *ep, struct epitem *epi) return 0; } -/* - * Disables a "struct epitem" in the eventpoll set. Returns -EBUSY if the item - * had no event flags set, indicating that another thread may be currently - * handling that item's events (in the case that EPOLLONESHOT was being - * used). Otherwise a zero result indicates that the item has been disabled - * from receiving events. A disabled item may be re-enabled via - * EPOLL_CTL_MOD. Must be called with "mtx" held. - */ -static int ep_disable(struct eventpoll *ep, struct epitem *epi) -{ - int result = 0; - unsigned long flags; - - spin_lock_irqsave(&ep->lock, flags); - if (epi->event.events & ~EP_PRIVATE_BITS) { - if (ep_is_linked(&epi->rdllink)) - list_del_init(&epi->rdllink); - /* Ensure ep_poll_callback will not add epi back onto ready - list: */ - epi->event.events &= EP_PRIVATE_BITS; - } - else - result = -EBUSY; - spin_unlock_irqrestore(&ep->lock, flags); - - return result; -} - static void ep_free(struct eventpoll *ep) { struct rb_node *rbp; @@ -811,8 +785,34 @@ static unsigned int ep_eventpoll_poll(struct file *file, poll_table *wait) return pollflags != -1 ? pollflags : 0; } +#ifdef CONFIG_PROC_FS +static int ep_show_fdinfo(struct seq_file *m, struct file *f) +{ + struct eventpoll *ep = f->private_data; + struct rb_node *rbp; + int ret = 0; + + mutex_lock(&ep->mtx); + for (rbp = rb_first(&ep->rbr); rbp; rbp = rb_next(rbp)) { + struct epitem *epi = rb_entry(rbp, struct epitem, rbn); + + ret = seq_printf(m, "tfd: %8d events: %8x data: %16llx\n", + epi->ffd.fd, epi->event.events, + (long long)epi->event.data); + if (ret) + break; + } + mutex_unlock(&ep->mtx); + + return ret; +} +#endif + /* File callbacks that implement the eventpoll file behaviour */ static const struct file_operations eventpoll_fops = { +#ifdef CONFIG_PROC_FS + .show_fdinfo = ep_show_fdinfo, +#endif .release = ep_eventpoll_release, .poll = ep_eventpoll_poll, .llseek = noop_llseek, @@ -1048,6 +1048,8 @@ static void ep_rbtree_insert(struct eventpoll *ep, struct epitem *epi) rb_insert_color(&epi->rbn, &ep->rbr); } + + #define PATH_ARR_SIZE 5 /* * These are the number paths of length 1 to 5, that we are allowing to emanate @@ -1311,7 +1313,7 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_even * otherwise we might miss an event that happens between the * f_op->poll() call and the new event set registering. */ - epi->event.events = event->events; + epi->event.events = event->events; /* need barrier below */ pt._key = event->events; epi->event.data = event->data; /* protected by mtx */ if (epi->event.events & EPOLLWAKEUP) { @@ -1322,6 +1324,26 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi, struct epoll_even } /* + * The following barrier has two effects: + * + * 1) Flush epi changes above to other CPUs. This ensures + * we do not miss events from ep_poll_callback if an + * event occurs immediately after we call f_op->poll(). + * We need this because we did not take ep->lock while + * changing epi above (but ep_poll_callback does take + * ep->lock). + * + * 2) We also need to ensure we do not miss _past_ events + * when calling f_op->poll(). This barrier also + * pairs with the barrier in wq_has_sleeper (see + * comments for wq_has_sleeper). + * + * This barrier will now guarantee ep_poll_callback or f_op->poll + * (or both) will notice the readiness of an item. + */ + smp_mb(); + + /* * Get current event bits. We can safely use the file* here because * its usage count has been increased by the caller of this function. */ @@ -1813,12 +1835,6 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd, } else error = -ENOENT; break; - case EPOLL_CTL_DISABLE: - if (epi) - error = ep_disable(ep, epi); - else - error = -ENOENT; - break; } mutex_unlock(&ep->mtx); diff --git a/fs/exec.c b/fs/exec.c index 0039055b1fc..20df02c1cc7 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -434,8 +434,9 @@ static int count(struct user_arg_ptr argv, int max) if (IS_ERR(p)) return -EFAULT; - if (i++ >= max) + if (i >= max) return -E2BIG; + ++i; if (fatal_signal_pending(current)) return -ERESTARTNOHAND; @@ -1175,9 +1176,24 @@ void free_bprm(struct linux_binprm *bprm) mutex_unlock(¤t->signal->cred_guard_mutex); abort_creds(bprm->cred); } + /* If a binfmt changed the interp, free it. */ + if (bprm->interp != bprm->filename) + kfree(bprm->interp); kfree(bprm); } +int bprm_change_interp(char *interp, struct linux_binprm *bprm) +{ + /* If a binfmt changed the interp, free it first. */ + if (bprm->interp != bprm->filename) + kfree(bprm->interp); + bprm->interp = kstrdup(interp, GFP_KERNEL); + if (!bprm->interp) + return -ENOMEM; + return 0; +} +EXPORT_SYMBOL(bprm_change_interp); + /* * install the new credentials for this executable */ @@ -1266,14 +1282,13 @@ int prepare_binprm(struct linux_binprm *bprm) bprm->cred->egid = current_egid(); if (!(bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID) && - !current->no_new_privs) { + !current->no_new_privs && + kuid_has_mapping(bprm->cred->user_ns, inode->i_uid) && + kgid_has_mapping(bprm->cred->user_ns, inode->i_gid)) { /* Set-uid? */ if (mode & S_ISUID) { - if (!kuid_has_mapping(bprm->cred->user_ns, inode->i_uid)) - return -EPERM; bprm->per_clear |= PER_CLEAR_ON_SETID; bprm->cred->euid = inode->i_uid; - } /* Set-gid? */ @@ -1283,8 +1298,6 @@ int prepare_binprm(struct linux_binprm *bprm) * executable. */ if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { - if (!kgid_has_mapping(bprm->cred->user_ns, inode->i_gid)) - return -EPERM; bprm->per_clear |= PER_CLEAR_ON_SETID; bprm->cred->egid = inode->i_gid; } @@ -1349,13 +1362,17 @@ EXPORT_SYMBOL(remove_arg_zero); /* * cycle the list of binary formats handler, until one recognizes the image */ -int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs) +int search_binary_handler(struct linux_binprm *bprm) { unsigned int depth = bprm->recursion_depth; int try,retval; struct linux_binfmt *fmt; pid_t old_pid, old_vpid; + /* This allows 4 levels of binfmt rewrites before failing hard. */ + if (depth > 5) + return -ELOOP; + retval = security_bprm_check(bprm); if (retval) return retval; @@ -1374,18 +1391,14 @@ int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs) for (try=0; try<2; try++) { read_lock(&binfmt_lock); list_for_each_entry(fmt, &formats, lh) { - int (*fn)(struct linux_binprm *, struct pt_regs *) = fmt->load_binary; + int (*fn)(struct linux_binprm *) = fmt->load_binary; if (!fn) continue; if (!try_module_get(fmt->module)) continue; read_unlock(&binfmt_lock); - retval = fn(bprm, regs); - /* - * Restore the depth counter to its starting value - * in this call, so we don't have to rely on every - * load_binary function to restore it on return. - */ + bprm->recursion_depth = depth + 1; + retval = fn(bprm); bprm->recursion_depth = depth; if (retval >= 0) { if (depth == 0) { @@ -1439,8 +1452,7 @@ EXPORT_SYMBOL(search_binary_handler); */ static int do_execve_common(const char *filename, struct user_arg_ptr argv, - struct user_arg_ptr envp, - struct pt_regs *regs) + struct user_arg_ptr envp) { struct linux_binprm *bprm; struct file *file; @@ -1524,7 +1536,7 @@ static int do_execve_common(const char *filename, if (retval < 0) goto out; - retval = search_binary_handler(bprm,regs); + retval = search_binary_handler(bprm); if (retval < 0) goto out; @@ -1566,19 +1578,17 @@ out_ret: int do_execve(const char *filename, const char __user *const __user *__argv, - const char __user *const __user *__envp, - struct pt_regs *regs) + const char __user *const __user *__envp) { struct user_arg_ptr argv = { .ptr.native = __argv }; struct user_arg_ptr envp = { .ptr.native = __envp }; - return do_execve_common(filename, argv, envp, regs); + return do_execve_common(filename, argv, envp); } #ifdef CONFIG_COMPAT -int compat_do_execve(const char *filename, +static int compat_do_execve(const char *filename, const compat_uptr_t __user *__argv, - const compat_uptr_t __user *__envp, - struct pt_regs *regs) + const compat_uptr_t __user *__envp) { struct user_arg_ptr argv = { .is_compat = true, @@ -1588,7 +1598,7 @@ int compat_do_execve(const char *filename, .is_compat = true, .ptr.compat = __envp, }; - return do_execve_common(filename, argv, envp, regs); + return do_execve_common(filename, argv, envp); } #endif @@ -1660,7 +1670,6 @@ int get_dumpable(struct mm_struct *mm) return __get_dumpable(mm->flags); } -#ifdef __ARCH_WANT_SYS_EXECVE SYSCALL_DEFINE3(execve, const char __user *, filename, const char __user *const __user *, argv, @@ -1669,7 +1678,7 @@ SYSCALL_DEFINE3(execve, struct filename *path = getname(filename); int error = PTR_ERR(path); if (!IS_ERR(path)) { - error = do_execve(path->name, argv, envp, current_pt_regs()); + error = do_execve(path->name, argv, envp); putname(path); } return error; @@ -1682,33 +1691,9 @@ asmlinkage long compat_sys_execve(const char __user * filename, struct filename *path = getname(filename); int error = PTR_ERR(path); if (!IS_ERR(path)) { - error = compat_do_execve(path->name, argv, envp, - current_pt_regs()); + error = compat_do_execve(path->name, argv, envp); putname(path); } return error; } #endif -#endif - -#ifdef __ARCH_WANT_KERNEL_EXECVE -int kernel_execve(const char *filename, - const char *const argv[], - const char *const envp[]) -{ - struct pt_regs *p = current_pt_regs(); - int ret; - - ret = do_execve(filename, - (const char __user *const __user *)argv, - (const char __user *const __user *)envp, p); - if (ret < 0) - return ret; - - /* - * We were successful. We won't be returning to our caller, but - * instead to user space by manipulating the kernel stack. - */ - ret_from_kernel_execve(p); -} -#endif diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c index b5618104775..d1f80abd882 100644 --- a/fs/exofs/inode.c +++ b/fs/exofs/inode.c @@ -361,12 +361,12 @@ static int read_exec(struct page_collect *pcol) return 0; err: - if (!pcol->read_4_write) - _unlock_pcol_pages(pcol, ret, READ); - - pcol_free(pcol); - + if (!pcol_copy) /* Failed before ownership transfer */ + pcol_copy = pcol; + _unlock_pcol_pages(pcol_copy, ret, READ); + pcol_free(pcol_copy); kfree(pcol_copy); + return ret; } @@ -676,8 +676,10 @@ static int write_exec(struct page_collect *pcol) return 0; err: - _unlock_pcol_pages(pcol, ret, WRITE); - pcol_free(pcol); + if (!pcol_copy) /* Failed before ownership transfer */ + pcol_copy = pcol; + _unlock_pcol_pages(pcol_copy, ret, WRITE); + pcol_free(pcol_copy); kfree(pcol_copy); return ret; diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index 29ab099e3e0..5df4bb4aab1 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -322,10 +322,10 @@ static int export_encode_fh(struct inode *inode, struct fid *fid, if (parent && (len < 4)) { *max_len = 4; - return 255; + return FILEID_INVALID; } else if (len < 2) { *max_len = 2; - return 255; + return FILEID_INVALID; } len = 2; @@ -341,10 +341,21 @@ static int export_encode_fh(struct inode *inode, struct fid *fid, return type; } +int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid, + int *max_len, struct inode *parent) +{ + const struct export_operations *nop = inode->i_sb->s_export_op; + + if (nop && nop->encode_fh) + return nop->encode_fh(inode, fid->raw, max_len, parent); + + return export_encode_fh(inode, fid, max_len, parent); +} +EXPORT_SYMBOL_GPL(exportfs_encode_inode_fh); + int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len, int connectable) { - const struct export_operations *nop = dentry->d_sb->s_export_op; int error; struct dentry *p = NULL; struct inode *inode = dentry->d_inode, *parent = NULL; @@ -357,10 +368,8 @@ int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len, */ parent = p->d_inode; } - if (nop->encode_fh) - error = nop->encode_fh(inode, fid->raw, max_len, parent); - else - error = export_encode_fh(inode, fid, max_len, parent); + + error = exportfs_encode_inode_fh(inode, fid, max_len, parent); dput(p); return error; diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c index 7320a66e958..22548f56197 100644 --- a/fs/ext3/balloc.c +++ b/fs/ext3/balloc.c @@ -2101,8 +2101,9 @@ int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range) end = start + (range->len >> sb->s_blocksize_bits) - 1; minlen = range->minlen >> sb->s_blocksize_bits; - if (unlikely(minlen > EXT3_BLOCKS_PER_GROUP(sb)) || - unlikely(start >= max_blks)) + if (minlen > EXT3_BLOCKS_PER_GROUP(sb) || + start >= max_blks || + range->len < sb->s_blocksize) return -EINVAL; if (end >= max_blks) end = max_blks - 1; diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c index c8fff930790..dd91264ba94 100644 --- a/fs/ext3/dir.c +++ b/fs/ext3/dir.c @@ -296,17 +296,17 @@ static inline loff_t ext3_get_htree_eof(struct file *filp) * NOTE: offsets obtained *before* ext3_set_inode_flag(dir, EXT3_INODE_INDEX) * will be invalid once the directory was converted into a dx directory */ -loff_t ext3_dir_llseek(struct file *file, loff_t offset, int origin) +loff_t ext3_dir_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; int dx_dir = is_dx_dir(inode); loff_t htree_max = ext3_get_htree_eof(file); if (likely(dx_dir)) - return generic_file_llseek_size(file, offset, origin, + return generic_file_llseek_size(file, offset, whence, htree_max, htree_max); else - return generic_file_llseek(file, offset, origin); + return generic_file_llseek(file, offset, whence); } /* diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c index 7e87e37a372..b176d425354 100644 --- a/fs/ext3/inode.c +++ b/fs/ext3/inode.c @@ -1071,8 +1071,7 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode *inode, * mapped. 0 in case of a HOLE. */ if (err > 0) { - if (err > 1) - WARN_ON(1); + WARN_ON(err > 1); err = 0; } *errp = err; diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 5366393528d..6e50223b329 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -1661,9 +1661,6 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent) return -ENOMEM; } sb->s_fs_info = sbi; - sbi->s_mount_opt = 0; - sbi->s_resuid = make_kuid(&init_user_ns, EXT3_DEF_RESUID); - sbi->s_resgid = make_kgid(&init_user_ns, EXT3_DEF_RESGID); sbi->s_sb_block = sb_block; blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE); diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig index c22f17021b6..987358740cb 100644 --- a/fs/ext4/Kconfig +++ b/fs/ext4/Kconfig @@ -39,22 +39,9 @@ config EXT4_USE_FOR_EXT23 compiled kernel size by using one file system driver for ext2, ext3, and ext4 file systems. -config EXT4_FS_XATTR - bool "Ext4 extended attributes" - depends on EXT4_FS - default y - help - Extended attributes are name:value pairs associated with inodes by - the kernel or by users (see the attr(5) manual page, or visit - <http://acl.bestbits.at/> for details). - - If unsure, say N. - - You need this for POSIX ACL support on ext4. - config EXT4_FS_POSIX_ACL bool "Ext4 POSIX Access Control Lists" - depends on EXT4_FS_XATTR + depends on EXT4_FS select FS_POSIX_ACL help POSIX Access Control Lists (ACLs) support permissions for users and @@ -67,7 +54,7 @@ config EXT4_FS_POSIX_ACL config EXT4_FS_SECURITY bool "Ext4 Security Labels" - depends on EXT4_FS_XATTR + depends on EXT4_FS help Security labels support alternative access control models implemented by security modules like SELinux. This option diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile index 56fd8f86593..0310fec2ee3 100644 --- a/fs/ext4/Makefile +++ b/fs/ext4/Makefile @@ -7,8 +7,8 @@ obj-$(CONFIG_EXT4_FS) += ext4.o ext4-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o page-io.o \ ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \ ext4_jbd2.o migrate.o mballoc.o block_validity.o move_extent.o \ - mmp.o indirect.o + mmp.o indirect.o extents_status.o xattr.o xattr_user.o \ + xattr_trusted.o inline.o -ext4-$(CONFIG_EXT4_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o ext4-$(CONFIG_EXT4_FS_POSIX_ACL) += acl.o ext4-$(CONFIG_EXT4_FS_SECURITY) += xattr_security.o diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c index d3c5b88fd89..e6e0d988439 100644 --- a/fs/ext4/acl.c +++ b/fs/ext4/acl.c @@ -423,8 +423,10 @@ ext4_xattr_set_acl(struct dentry *dentry, const char *name, const void *value, retry: handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb)); - if (IS_ERR(handle)) - return PTR_ERR(handle); + if (IS_ERR(handle)) { + error = PTR_ERR(handle); + goto release_and_out; + } error = ext4_set_acl(handle, inode, type, acl); ext4_journal_stop(handle); if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 8e07d2a5a13..80a28b29727 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -27,23 +27,11 @@ #include <linux/slab.h> #include <linux/rbtree.h> #include "ext4.h" - -static unsigned char ext4_filetype_table[] = { - DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK -}; +#include "xattr.h" static int ext4_dx_readdir(struct file *filp, void *dirent, filldir_t filldir); -static unsigned char get_dtype(struct super_block *sb, int filetype) -{ - if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) || - (filetype >= EXT4_FT_MAX)) - return DT_UNKNOWN; - - return (ext4_filetype_table[filetype]); -} - /** * Check if the given dir-inode refers to an htree-indexed directory * (or a directory which chould potentially get coverted to use htree @@ -68,11 +56,14 @@ static int is_dx_dir(struct inode *inode) * Return 0 if the directory entry is OK, and 1 if there is a problem * * Note: this is the opposite of what ext2 and ext3 historically returned... + * + * bh passed here can be an inode block or a dir data block, depending + * on the inode inline data flag. */ int __ext4_check_dir_entry(const char *function, unsigned int line, struct inode *dir, struct file *filp, struct ext4_dir_entry_2 *de, - struct buffer_head *bh, + struct buffer_head *bh, char *buf, int size, unsigned int offset) { const char *error_msg = NULL; @@ -85,9 +76,8 @@ int __ext4_check_dir_entry(const char *function, unsigned int line, error_msg = "rec_len % 4 != 0"; else if (unlikely(rlen < EXT4_DIR_REC_LEN(de->name_len))) error_msg = "rec_len is too small for name_len"; - else if (unlikely(((char *) de - bh->b_data) + rlen > - dir->i_sb->s_blocksize)) - error_msg = "directory entry across blocks"; + else if (unlikely(((char *) de - buf) + rlen > size)) + error_msg = "directory entry across range"; else if (unlikely(le32_to_cpu(de->inode) > le32_to_cpu(EXT4_SB(dir->i_sb)->s_es->s_inodes_count))) error_msg = "inode out of bounds"; @@ -98,14 +88,14 @@ int __ext4_check_dir_entry(const char *function, unsigned int line, ext4_error_file(filp, function, line, bh->b_blocknr, "bad entry in directory: %s - offset=%u(%u), " "inode=%u, rec_len=%d, name_len=%d", - error_msg, (unsigned) (offset % bh->b_size), + error_msg, (unsigned) (offset % size), offset, le32_to_cpu(de->inode), rlen, de->name_len); else ext4_error_inode(dir, function, line, bh->b_blocknr, "bad entry in directory: %s - offset=%u(%u), " "inode=%u, rec_len=%d, name_len=%d", - error_msg, (unsigned) (offset % bh->b_size), + error_msg, (unsigned) (offset % size), offset, le32_to_cpu(de->inode), rlen, de->name_len); @@ -125,6 +115,14 @@ static int ext4_readdir(struct file *filp, int ret = 0; int dir_has_error = 0; + if (ext4_has_inline_data(inode)) { + int has_inline_data = 1; + ret = ext4_read_inline_dir(filp, dirent, filldir, + &has_inline_data); + if (has_inline_data) + return ret; + } + if (is_dx_dir(inode)) { err = ext4_dx_readdir(filp, dirent, filldir); if (err != ERR_BAD_DX_DIR) { @@ -221,8 +219,9 @@ revalidate: while (!error && filp->f_pos < inode->i_size && offset < sb->s_blocksize) { de = (struct ext4_dir_entry_2 *) (bh->b_data + offset); - if (ext4_check_dir_entry(inode, filp, de, - bh, offset)) { + if (ext4_check_dir_entry(inode, filp, de, bh, + bh->b_data, bh->b_size, + offset)) { /* * On error, skip the f_pos to the next block */ @@ -334,17 +333,17 @@ static inline loff_t ext4_get_htree_eof(struct file *filp) * * For non-htree, ext4_llseek already chooses the proper max offset. */ -loff_t ext4_dir_llseek(struct file *file, loff_t offset, int origin) +loff_t ext4_dir_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; int dx_dir = is_dx_dir(inode); loff_t htree_max = ext4_get_htree_eof(file); if (likely(dx_dir)) - return generic_file_llseek_size(file, offset, origin, + return generic_file_llseek_size(file, offset, whence, htree_max, htree_max); else - return ext4_llseek(file, offset, origin); + return ext4_llseek(file, offset, whence); } /* diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index df163da388c..8462eb3c33a 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -57,6 +57,16 @@ #define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif +/* + * Turn on EXT_DEBUG to get lots of info about extents operations. + */ +#define EXT_DEBUG__ +#ifdef EXT_DEBUG +#define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) +#else +#define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + #define EXT4_ERROR_INODE(inode, fmt, a...) \ ext4_error_inode((inode), __func__, __LINE__, 0, (fmt), ## a) @@ -392,6 +402,7 @@ struct flex_groups { #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ #define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ +#define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ #define EXT4_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */ @@ -448,28 +459,26 @@ enum { EXT4_INODE_EXTENTS = 19, /* Inode uses extents */ EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */ + EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ }; -#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) -#define CHECK_FLAG_VALUE(FLAG) if (!TEST_FLAG_VALUE(FLAG)) { \ - printk(KERN_EMERG "EXT4 flag fail: " #FLAG ": %d %d\n", \ - EXT4_##FLAG##_FL, EXT4_INODE_##FLAG); BUG_ON(1); } - -/* - * Since it's pretty easy to mix up bit numbers and hex values, and we - * can't do a compile-time test for ENUM values, we use a run-time - * test to make sure that EXT4_XXX_FL is consistent with respect to - * EXT4_INODE_XXX. If all is well the printk and BUG_ON will all drop - * out so it won't cost any extra space in the compiled kernel image. - * But it's important that these values are the same, since we are - * using EXT4_INODE_XXX to test for the flag values, but EXT4_XX_FL - * must be consistent with the values of FS_XXX_FL defined in - * include/linux/fs.h and the on-disk values found in ext2, ext3, and - * ext4 filesystems, and of course the values defined in e2fsprogs. +/* + * Since it's pretty easy to mix up bit numbers and hex values, we use a + * build-time check to make sure that EXT4_XXX_FL is consistent with respect to + * EXT4_INODE_XXX. If all is well, the macros will be dropped, so, it won't cost + * any extra space in the compiled kernel image, otherwise, the build will fail. + * It's important that these values are the same, since we are using + * EXT4_INODE_XXX to test for flag values, but EXT4_XXX_FL must be consistent + * with the values of FS_XXX_FL defined in include/linux/fs.h and the on-disk + * values found in ext2, ext3 and ext4 filesystems, and of course the values + * defined in e2fsprogs. * * It's not paranoia if the Murphy's Law really *is* out to get you. :-) */ +#define TEST_FLAG_VALUE(FLAG) (EXT4_##FLAG##_FL == (1 << EXT4_INODE_##FLAG)) +#define CHECK_FLAG_VALUE(FLAG) BUILD_BUG_ON(!TEST_FLAG_VALUE(FLAG)) + static inline void ext4_check_flag_values(void) { CHECK_FLAG_VALUE(SECRM); @@ -494,6 +503,7 @@ static inline void ext4_check_flag_values(void) CHECK_FLAG_VALUE(EXTENTS); CHECK_FLAG_VALUE(EA_INODE); CHECK_FLAG_VALUE(EOFBLOCKS); + CHECK_FLAG_VALUE(INLINE_DATA); CHECK_FLAG_VALUE(RESERVED); } @@ -811,6 +821,8 @@ struct ext4_ext_cache { __u32 ec_len; /* must be 32bit to return holes */ }; +#include "extents_status.h" + /* * fourth extended file system inode data in memory */ @@ -833,7 +845,6 @@ struct ext4_inode_info { #endif unsigned long i_flags; -#ifdef CONFIG_EXT4_FS_XATTR /* * Extended attributes can be read independently of the main file * data. Taking i_mutex even when reading would cause contention @@ -842,7 +853,6 @@ struct ext4_inode_info { * EAs. */ struct rw_semaphore xattr_sem; -#endif struct list_head i_orphan; /* unlinked but open inodes */ @@ -888,6 +898,10 @@ struct ext4_inode_info { struct list_head i_prealloc_list; spinlock_t i_prealloc_lock; + /* extents status tree */ + struct ext4_es_tree i_es_tree; + rwlock_t i_es_lock; + /* ialloc */ ext4_group_t i_last_alloc_group; @@ -902,6 +916,10 @@ struct ext4_inode_info { /* on-disk additional length */ __u16 i_extra_isize; + /* Indicate the inline data space. */ + u16 i_inline_off; + u16 i_inline_size; + #ifdef CONFIG_QUOTA /* quota space reservation, managed internally by quota code */ qsize_t i_reserved_quota; @@ -1360,6 +1378,7 @@ enum { EXT4_STATE_DELALLOC_RESERVED, /* blks already reserved for delalloc */ EXT4_STATE_DIOREAD_LOCK, /* Disable support for dio read nolocking */ + EXT4_STATE_MAY_INLINE_DATA, /* may have in-inode data */ }; #define EXT4_INODE_BIT_FNS(name, field, offset) \ @@ -1481,7 +1500,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ #define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM 0x2000 /* use crc32c for bg */ #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ -#define EXT4_FEATURE_INCOMPAT_INLINEDATA 0x8000 /* data in inode */ +#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ @@ -1505,7 +1524,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) EXT4_FEATURE_INCOMPAT_EXTENTS| \ EXT4_FEATURE_INCOMPAT_64BIT| \ EXT4_FEATURE_INCOMPAT_FLEX_BG| \ - EXT4_FEATURE_INCOMPAT_MMP) + EXT4_FEATURE_INCOMPAT_MMP | \ + EXT4_FEATURE_INCOMPAT_INLINE_DATA) #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ @@ -1592,6 +1612,11 @@ struct ext4_dir_entry_tail { __le32 det_checksum; /* crc32c(uuid+inum+dirblock) */ }; +#define EXT4_DIRENT_TAIL(block, blocksize) \ + ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ + ((blocksize) - \ + sizeof(struct ext4_dir_entry_tail)))) + /* * Ext4 directory file types. Only the low 3 bits are used. The * other bits are reserved for now. @@ -1936,14 +1961,42 @@ ext4_fsblk_t ext4_inode_to_goal_block(struct inode *); extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, struct file *, struct ext4_dir_entry_2 *, - struct buffer_head *, unsigned int); -#define ext4_check_dir_entry(dir, filp, de, bh, offset) \ + struct buffer_head *, char *, int, + unsigned int); +#define ext4_check_dir_entry(dir, filp, de, bh, buf, size, offset) \ unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ - (de), (bh), (offset))) + (de), (bh), (buf), (size), (offset))) extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, __u32 minor_hash, struct ext4_dir_entry_2 *dirent); extern void ext4_htree_free_dir_info(struct dir_private_info *p); +extern int ext4_find_dest_de(struct inode *dir, struct inode *inode, + struct buffer_head *bh, + void *buf, int buf_size, + const char *name, int namelen, + struct ext4_dir_entry_2 **dest_de); +void ext4_insert_dentry(struct inode *inode, + struct ext4_dir_entry_2 *de, + int buf_size, + const char *name, int namelen); +static inline void ext4_update_dx_flag(struct inode *inode) +{ + if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb, + EXT4_FEATURE_COMPAT_DIR_INDEX)) + ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); +} +static unsigned char ext4_filetype_table[] = { + DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK +}; + +static inline unsigned char get_dtype(struct super_block *sb, int filetype) +{ + if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FILETYPE) || + (filetype >= EXT4_FT_MAX)) + return DT_UNKNOWN; + + return ext4_filetype_table[filetype]; +} /* fsync.c */ extern int ext4_sync_file(struct file *, loff_t, loff_t, int); @@ -1994,8 +2047,23 @@ struct buffer_head *ext4_getblk(handle_t *, struct inode *, ext4_lblk_t, int, int *); struct buffer_head *ext4_bread(handle_t *, struct inode *, ext4_lblk_t, int, int *); +int ext4_get_block_write(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create); int ext4_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); +int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, + struct buffer_head *bh, int create); +int ext4_walk_page_buffers(handle_t *handle, + struct buffer_head *head, + unsigned from, + unsigned to, + int *partial, + int (*fn)(handle_t *handle, + struct buffer_head *bh)); +int do_journal_get_write_access(handle_t *handle, + struct buffer_head *bh); +#define FALL_BACK_TO_NONDELALLOC 1 +#define CONVERT_INLINE_DATA 2 extern struct inode *ext4_iget(struct super_block *, unsigned long); extern int ext4_write_inode(struct inode *, struct writeback_control *); @@ -2050,6 +2118,20 @@ extern int ext4_orphan_add(handle_t *, struct inode *); extern int ext4_orphan_del(handle_t *, struct inode *); extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash, __u32 start_minor_hash, __u32 *next_hash); +extern int search_dir(struct buffer_head *bh, + char *search_buf, + int buf_size, + struct inode *dir, + const struct qstr *d_name, + unsigned int offset, + struct ext4_dir_entry_2 **res_dir); +extern int ext4_generic_delete_entry(handle_t *handle, + struct inode *dir, + struct ext4_dir_entry_2 *de_del, + struct buffer_head *bh, + void *entry_buf, + int buf_size, + int csum_size); /* resize.c */ extern int ext4_group_add(struct super_block *sb, @@ -2376,6 +2458,15 @@ extern void ext4_unwritten_wait(struct inode *inode); extern const struct inode_operations ext4_dir_inode_operations; extern const struct inode_operations ext4_special_inode_operations; extern struct dentry *ext4_get_parent(struct dentry *child); +extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, + struct ext4_dir_entry_2 *de, + int blocksize, int csum_size, + unsigned int parent_ino, int dotdot_real_len); +extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t, + unsigned int blocksize); +extern int ext4_handle_dirty_dirent_node(handle_t *handle, + struct inode *inode, + struct buffer_head *bh); /* symlink.c */ extern const struct inode_operations ext4_symlink_inode_operations; @@ -2393,6 +2484,9 @@ extern int ext4_check_blockref(const char *, unsigned int, struct inode *, __le32 *, unsigned int); /* extents.c */ +struct ext4_ext_path; +struct ext4_extent; + extern int ext4_ext_tree_init(handle_t *handle, struct inode *); extern int ext4_ext_writepage_trans_blocks(struct inode *, int); extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, @@ -2410,8 +2504,27 @@ extern int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset, ssize_t len); extern int ext4_map_blocks(handle_t *handle, struct inode *inode, struct ext4_map_blocks *map, int flags); +extern int ext4_ext_calc_metadata_amount(struct inode *inode, + ext4_lblk_t lblocks); +extern int ext4_extent_tree_init(handle_t *, struct inode *); +extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, + int num, + struct ext4_ext_path *path); +extern int ext4_can_extents_be_merged(struct inode *inode, + struct ext4_extent *ex1, + struct ext4_extent *ex2); +extern int ext4_ext_insert_extent(handle_t *, struct inode *, + struct ext4_ext_path *, + struct ext4_extent *, int); +extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t, + struct ext4_ext_path *); +extern void ext4_ext_drop_refs(struct ext4_ext_path *); +extern int ext4_ext_check_inode(struct inode *inode); +extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk); extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len); + + /* move_extent.c */ extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 start_orig, __u64 start_donor, @@ -2445,14 +2558,10 @@ enum ext4_state_bits { * never, ever appear in a buffer_head's state * flag. See EXT4_MAP_FROM_CLUSTER to see where * this is used. */ - BH_Da_Mapped, /* Delayed allocated block that now has a mapping. This - * flag is set when ext4_map_blocks is called on a - * delayed allocated block to get its real mapping. */ }; BUFFER_FNS(Uninit, uninit) TAS_BUFFER_FNS(Uninit, uninit) -BUFFER_FNS(Da_Mapped, da_mapped) /* * Add new method to test whether block and inode bitmaps are properly @@ -2503,6 +2612,4 @@ extern void ext4_resize_end(struct super_block *sb); #endif /* __KERNEL__ */ -#include "ext4_extents.h" - #endif /* _EXT4_H */ diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h index cb1b2c91996..487fda12bc0 100644 --- a/fs/ext4/ext4_extents.h +++ b/fs/ext4/ext4_extents.h @@ -43,16 +43,6 @@ #define CHECK_BINSEARCH__ /* - * Turn on EXT_DEBUG to get lots of info about extents operations. - */ -#define EXT_DEBUG__ -#ifdef EXT_DEBUG -#define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) -#else -#define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) -#endif - -/* * If EXT_STATS is defined then stats numbers are collected. * These number will be displayed at umount time. */ @@ -144,20 +134,6 @@ struct ext4_ext_path { */ /* - * to be called by ext4_ext_walk_space() - * negative retcode - error - * positive retcode - signal for ext4_ext_walk_space(), see below - * callback must return valid extent (passed or newly created) - */ -typedef int (*ext_prepare_callback)(struct inode *, ext4_lblk_t, - struct ext4_ext_cache *, - struct ext4_extent *, void *); - -#define EXT_CONTINUE 0 -#define EXT_BREAK 1 -#define EXT_REPEAT 2 - -/* * Maximum number of logical blocks in a file; ext4_extent's ee_block is * __le32. */ @@ -300,21 +276,5 @@ static inline void ext4_idx_store_pblock(struct ext4_extent_idx *ix, 0xffff); } -extern int ext4_ext_calc_metadata_amount(struct inode *inode, - ext4_lblk_t lblocks); -extern int ext4_extent_tree_init(handle_t *, struct inode *); -extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, - int num, - struct ext4_ext_path *path); -extern int ext4_can_extents_be_merged(struct inode *inode, - struct ext4_extent *ex1, - struct ext4_extent *ex2); -extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *, int); -extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t, - struct ext4_ext_path *); -extern void ext4_ext_drop_refs(struct ext4_ext_path *); -extern int ext4_ext_check_inode(struct inode *inode); -extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk, - int search_hint_reverse); #endif /* _EXT4_EXTENTS */ diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h index 56d258c1830..7177f9b21cb 100644 --- a/fs/ext4/ext4_jbd2.h +++ b/fs/ext4/ext4_jbd2.h @@ -254,13 +254,6 @@ static inline void ext4_handle_sync(handle_t *handle) handle->h_sync = 1; } -static inline void ext4_handle_release_buffer(handle_t *handle, - struct buffer_head *bh) -{ - if (ext4_handle_valid(handle)) - jbd2_journal_release_buffer(handle, bh); -} - static inline int ext4_handle_is_aborted(handle_t *handle) { if (ext4_handle_valid(handle)) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 7011ac96720..5ae1674ec12 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -41,6 +41,8 @@ #include <asm/uaccess.h> #include <linux/fiemap.h> #include "ext4_jbd2.h" +#include "ext4_extents.h" +#include "xattr.h" #include <trace/events/ext4.h> @@ -109,6 +111,9 @@ static int ext4_split_extent_at(handle_t *handle, int split_flag, int flags); +static int ext4_find_delayed_extent(struct inode *inode, + struct ext4_ext_cache *newex); + static int ext4_ext_truncate_extend_restart(handle_t *handle, struct inode *inode, int needed) @@ -1959,27 +1964,33 @@ cleanup: return err; } -static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block, - ext4_lblk_t num, ext_prepare_callback func, - void *cbdata) +static int ext4_fill_fiemap_extents(struct inode *inode, + ext4_lblk_t block, ext4_lblk_t num, + struct fiemap_extent_info *fieinfo) { struct ext4_ext_path *path = NULL; - struct ext4_ext_cache cbex; + struct ext4_ext_cache newex; struct ext4_extent *ex; - ext4_lblk_t next, start = 0, end = 0; + ext4_lblk_t next, next_del, start = 0, end = 0; ext4_lblk_t last = block + num; - int depth, exists, err = 0; - - BUG_ON(func == NULL); - BUG_ON(inode == NULL); + int exists, depth = 0, err = 0; + unsigned int flags = 0; + unsigned char blksize_bits = inode->i_sb->s_blocksize_bits; while (block < last && block != EXT_MAX_BLOCKS) { num = last - block; /* find extent for this block */ down_read(&EXT4_I(inode)->i_data_sem); + + if (path && ext_depth(inode) != depth) { + /* depth was changed. we have to realloc path */ + kfree(path); + path = NULL; + } + path = ext4_ext_find_extent(inode, block, path); - up_read(&EXT4_I(inode)->i_data_sem); if (IS_ERR(path)) { + up_read(&EXT4_I(inode)->i_data_sem); err = PTR_ERR(path); path = NULL; break; @@ -1987,13 +1998,16 @@ static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block, depth = ext_depth(inode); if (unlikely(path[depth].p_hdr == NULL)) { + up_read(&EXT4_I(inode)->i_data_sem); EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth); err = -EIO; break; } ex = path[depth].p_ext; next = ext4_ext_next_allocated_block(path); + ext4_ext_drop_refs(path); + flags = 0; exists = 0; if (!ex) { /* there is no extent yet, so try to allocate @@ -2030,40 +2044,64 @@ static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block, BUG_ON(end <= start); if (!exists) { - cbex.ec_block = start; - cbex.ec_len = end - start; - cbex.ec_start = 0; + newex.ec_block = start; + newex.ec_len = end - start; + newex.ec_start = 0; } else { - cbex.ec_block = le32_to_cpu(ex->ee_block); - cbex.ec_len = ext4_ext_get_actual_len(ex); - cbex.ec_start = ext4_ext_pblock(ex); + newex.ec_block = le32_to_cpu(ex->ee_block); + newex.ec_len = ext4_ext_get_actual_len(ex); + newex.ec_start = ext4_ext_pblock(ex); + if (ext4_ext_is_uninitialized(ex)) + flags |= FIEMAP_EXTENT_UNWRITTEN; } - if (unlikely(cbex.ec_len == 0)) { - EXT4_ERROR_INODE(inode, "cbex.ec_len == 0"); - err = -EIO; - break; + /* + * Find delayed extent and update newex accordingly. We call + * it even in !exists case to find out whether newex is the + * last existing extent or not. + */ + next_del = ext4_find_delayed_extent(inode, &newex); + if (!exists && next_del) { + exists = 1; + flags |= FIEMAP_EXTENT_DELALLOC; } - err = func(inode, next, &cbex, ex, cbdata); - ext4_ext_drop_refs(path); + up_read(&EXT4_I(inode)->i_data_sem); - if (err < 0) + if (unlikely(newex.ec_len == 0)) { + EXT4_ERROR_INODE(inode, "newex.ec_len == 0"); + err = -EIO; break; + } - if (err == EXT_REPEAT) - continue; - else if (err == EXT_BREAK) { - err = 0; - break; + /* This is possible iff next == next_del == EXT_MAX_BLOCKS */ + if (next == next_del) { + flags |= FIEMAP_EXTENT_LAST; + if (unlikely(next_del != EXT_MAX_BLOCKS || + next != EXT_MAX_BLOCKS)) { + EXT4_ERROR_INODE(inode, + "next extent == %u, next " + "delalloc extent = %u", + next, next_del); + err = -EIO; + break; + } } - if (ext_depth(inode) != depth) { - /* depth was changed. we have to realloc path */ - kfree(path); - path = NULL; + if (exists) { + err = fiemap_fill_next_extent(fieinfo, + (__u64)newex.ec_block << blksize_bits, + (__u64)newex.ec_start << blksize_bits, + (__u64)newex.ec_len << blksize_bits, + flags); + if (err < 0) + break; + if (err == 1) { + err = 0; + break; + } } - block = cbex.ec_block + cbex.ec_len; + block = newex.ec_block + newex.ec_len; } if (path) { @@ -2156,7 +2194,6 @@ ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, struct ext4_extent *ex) { struct ext4_ext_cache *cex; - struct ext4_sb_info *sbi; int ret = 0; /* @@ -2164,7 +2201,6 @@ ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, */ spin_lock(&EXT4_I(inode)->i_block_reservation_lock); cex = &EXT4_I(inode)->i_cached_extent; - sbi = EXT4_SB(inode->i_sb); /* has cache valid data? */ if (cex->ec_len == 0) @@ -2190,13 +2226,14 @@ errout: * removes index from the index block. */ static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode, - struct ext4_ext_path *path) + struct ext4_ext_path *path, int depth) { int err; ext4_fsblk_t leaf; /* free index block */ - path--; + depth--; + path = path + depth; leaf = ext4_idx_pblock(path->p_idx); if (unlikely(path->p_hdr->eh_entries == 0)) { EXT4_ERROR_INODE(inode, "path->p_hdr->eh_entries == 0"); @@ -2221,6 +2258,19 @@ static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode, ext4_free_blocks(handle, inode, NULL, leaf, 1, EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET); + + while (--depth >= 0) { + if (path->p_idx != EXT_FIRST_INDEX(path->p_hdr)) + break; + path--; + err = ext4_ext_get_access(handle, inode, path); + if (err) + break; + path->p_idx->ei_block = (path+1)->p_idx->ei_block; + err = ext4_ext_dirty(handle, inode, path); + if (err) + break; + } return err; } @@ -2273,7 +2323,13 @@ int ext4_ext_calc_credits_for_single_extent(struct inode *inode, int nrblocks, int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, int chunk) { int index; - int depth = ext_depth(inode); + int depth; + + /* If we are converting the inline data, only one is needed here. */ + if (ext4_has_inline_data(inode)) + return 1; + + depth = ext_depth(inode); if (chunk) index = depth * 2; @@ -2557,7 +2613,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode, /* if this leaf is free, then we should * remove it from index block above */ if (err == 0 && eh->eh_entries == 0 && path[depth].p_bh != NULL) - err = ext4_ext_rm_idx(handle, inode, path + depth); + err = ext4_ext_rm_idx(handle, inode, path, depth); out: return err; @@ -2760,7 +2816,7 @@ again: /* index is empty, remove it; * handle must be already prepared by the * truncatei_leaf() */ - err = ext4_ext_rm_idx(handle, inode, path + i); + err = ext4_ext_rm_idx(handle, inode, path, i); } /* root level has p_bh == NULL, brelse() eats this */ brelse(path[i].p_bh); @@ -3461,115 +3517,34 @@ out: /** * ext4_find_delalloc_range: find delayed allocated block in the given range. * - * Goes through the buffer heads in the range [lblk_start, lblk_end] and returns - * whether there are any buffers marked for delayed allocation. It returns '1' - * on the first delalloc'ed buffer head found. If no buffer head in the given - * range is marked for delalloc, it returns 0. - * lblk_start should always be <= lblk_end. - * search_hint_reverse is to indicate that searching in reverse from lblk_end to - * lblk_start might be more efficient (i.e., we will likely hit the delalloc'ed - * block sooner). This is useful when blocks are truncated sequentially from - * lblk_start towards lblk_end. + * Return 1 if there is a delalloc block in the range, otherwise 0. */ static int ext4_find_delalloc_range(struct inode *inode, ext4_lblk_t lblk_start, - ext4_lblk_t lblk_end, - int search_hint_reverse) + ext4_lblk_t lblk_end) { - struct address_space *mapping = inode->i_mapping; - struct buffer_head *head, *bh = NULL; - struct page *page; - ext4_lblk_t i, pg_lblk; - pgoff_t index; + struct extent_status es; - if (!test_opt(inode->i_sb, DELALLOC)) - return 0; - - /* reverse search wont work if fs block size is less than page size */ - if (inode->i_blkbits < PAGE_CACHE_SHIFT) - search_hint_reverse = 0; - - if (search_hint_reverse) - i = lblk_end; + es.start = lblk_start; + ext4_es_find_extent(inode, &es); + if (es.len == 0) + return 0; /* there is no delay extent in this tree */ + else if (es.start <= lblk_start && lblk_start < es.start + es.len) + return 1; + else if (lblk_start <= es.start && es.start <= lblk_end) + return 1; else - i = lblk_start; - - index = i >> (PAGE_CACHE_SHIFT - inode->i_blkbits); - - while ((i >= lblk_start) && (i <= lblk_end)) { - page = find_get_page(mapping, index); - if (!page) - goto nextpage; - - if (!page_has_buffers(page)) - goto nextpage; - - head = page_buffers(page); - if (!head) - goto nextpage; - - bh = head; - pg_lblk = index << (PAGE_CACHE_SHIFT - - inode->i_blkbits); - do { - if (unlikely(pg_lblk < lblk_start)) { - /* - * This is possible when fs block size is less - * than page size and our cluster starts/ends in - * middle of the page. So we need to skip the - * initial few blocks till we reach the 'lblk' - */ - pg_lblk++; - continue; - } - - /* Check if the buffer is delayed allocated and that it - * is not yet mapped. (when da-buffers are mapped during - * their writeout, their da_mapped bit is set.) - */ - if (buffer_delay(bh) && !buffer_da_mapped(bh)) { - page_cache_release(page); - trace_ext4_find_delalloc_range(inode, - lblk_start, lblk_end, - search_hint_reverse, - 1, i); - return 1; - } - if (search_hint_reverse) - i--; - else - i++; - } while ((i >= lblk_start) && (i <= lblk_end) && - ((bh = bh->b_this_page) != head)); -nextpage: - if (page) - page_cache_release(page); - /* - * Move to next page. 'i' will be the first lblk in the next - * page. - */ - if (search_hint_reverse) - index--; - else - index++; - i = index << (PAGE_CACHE_SHIFT - inode->i_blkbits); - } - - trace_ext4_find_delalloc_range(inode, lblk_start, lblk_end, - search_hint_reverse, 0, 0); - return 0; + return 0; } -int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk, - int search_hint_reverse) +int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk) { struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); ext4_lblk_t lblk_start, lblk_end; lblk_start = lblk & (~(sbi->s_cluster_ratio - 1)); lblk_end = lblk_start + sbi->s_cluster_ratio - 1; - return ext4_find_delalloc_range(inode, lblk_start, lblk_end, - search_hint_reverse); + return ext4_find_delalloc_range(inode, lblk_start, lblk_end); } /** @@ -3630,7 +3605,7 @@ get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start, lblk_from = lblk_start & (~(sbi->s_cluster_ratio - 1)); lblk_to = lblk_from + c_offset - 1; - if (ext4_find_delalloc_range(inode, lblk_from, lblk_to, 0)) + if (ext4_find_delalloc_range(inode, lblk_from, lblk_to)) allocated_clusters--; } @@ -3640,7 +3615,7 @@ get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start, lblk_from = lblk_start + num_blks; lblk_to = lblk_from + (sbi->s_cluster_ratio - c_offset) - 1; - if (ext4_find_delalloc_range(inode, lblk_from, lblk_to, 0)) + if (ext4_find_delalloc_range(inode, lblk_from, lblk_to)) allocated_clusters--; } @@ -3663,8 +3638,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode, flags, allocated); ext4_ext_show_leaf(inode, path); - trace_ext4_ext_handle_uninitialized_extents(inode, map, allocated, - newblock); + trace_ext4_ext_handle_uninitialized_extents(inode, map, flags, + allocated, newblock); /* get_block() before submit the IO, split the extent */ if ((flags & EXT4_GET_BLOCKS_PRE_IO)) { @@ -3911,7 +3886,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, struct ext4_extent newex, *ex, *ex2; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); ext4_fsblk_t newblock = 0; - int free_on_err = 0, err = 0, depth, ret; + int free_on_err = 0, err = 0, depth; unsigned int allocated = 0, offset = 0; unsigned int allocated_clusters = 0; struct ext4_allocation_request ar; @@ -3927,7 +3902,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, if (ext4_ext_in_cache(inode, map->m_lblk, &newex)) { if (!newex.ee_start_lo && !newex.ee_start_hi) { if ((sbi->s_cluster_ratio > 1) && - ext4_find_delalloc_cluster(inode, map->m_lblk, 0)) + ext4_find_delalloc_cluster(inode, map->m_lblk)) map->m_flags |= EXT4_MAP_FROM_CLUSTER; if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { @@ -4007,15 +3982,15 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, ee_len, ee_start); goto out; } - ret = ext4_ext_handle_uninitialized_extents( + allocated = ext4_ext_handle_uninitialized_extents( handle, inode, map, path, flags, allocated, newblock); - return ret; + goto out3; } } if ((sbi->s_cluster_ratio > 1) && - ext4_find_delalloc_cluster(inode, map->m_lblk, 0)) + ext4_find_delalloc_cluster(inode, map->m_lblk)) map->m_flags |= EXT4_MAP_FROM_CLUSTER; /* @@ -4284,8 +4259,8 @@ out2: kfree(path); } - trace_ext4_ext_map_blocks_exit(inode, map->m_lblk, - newblock, map->m_len, err ? err : allocated); +out3: + trace_ext4_ext_map_blocks_exit(inode, map, err ? err : allocated); return err ? err : allocated; } @@ -4344,6 +4319,8 @@ void ext4_ext_truncate(struct inode *inode) last_block = (inode->i_size + sb->s_blocksize - 1) >> EXT4_BLOCK_SIZE_BITS(sb); + err = ext4_es_remove_extent(inode, last_block, + EXT_MAX_BLOCKS - last_block); err = ext4_ext_remove_space(inode, last_block, EXT_MAX_BLOCKS - 1); /* In a multi-transaction truncate, we only make the final @@ -4434,6 +4411,10 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) if (mode & FALLOC_FL_PUNCH_HOLE) return ext4_punch_hole(file, offset, len); + ret = ext4_convert_inline_data(inode); + if (ret) + return ret; + trace_ext4_fallocate_enter(inode, offset, len, mode); map.m_lblk = offset >> blkbits; /* @@ -4572,206 +4553,43 @@ int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset, } /* - * Callback function called for each extent to gather FIEMAP information. + * If newex is not existing extent (newex->ec_start equals zero) find + * delayed extent at start of newex and update newex accordingly and + * return start of the next delayed extent. + * + * If newex is existing extent (newex->ec_start is not equal zero) + * return start of next delayed extent or EXT_MAX_BLOCKS if no delayed + * extent found. Leave newex unmodified. */ -static int ext4_ext_fiemap_cb(struct inode *inode, ext4_lblk_t next, - struct ext4_ext_cache *newex, struct ext4_extent *ex, - void *data) +static int ext4_find_delayed_extent(struct inode *inode, + struct ext4_ext_cache *newex) { - __u64 logical; - __u64 physical; - __u64 length; - __u32 flags = 0; - int ret = 0; - struct fiemap_extent_info *fieinfo = data; - unsigned char blksize_bits; + struct extent_status es; + ext4_lblk_t next_del; - blksize_bits = inode->i_sb->s_blocksize_bits; - logical = (__u64)newex->ec_block << blksize_bits; + es.start = newex->ec_block; + next_del = ext4_es_find_extent(inode, &es); if (newex->ec_start == 0) { /* * No extent in extent-tree contains block @newex->ec_start, * then the block may stay in 1)a hole or 2)delayed-extent. - * - * Holes or delayed-extents are processed as follows. - * 1. lookup dirty pages with specified range in pagecache. - * If no page is got, then there is no delayed-extent and - * return with EXT_CONTINUE. - * 2. find the 1st mapped buffer, - * 3. check if the mapped buffer is both in the request range - * and a delayed buffer. If not, there is no delayed-extent, - * then return. - * 4. a delayed-extent is found, the extent will be collected. */ - ext4_lblk_t end = 0; - pgoff_t last_offset; - pgoff_t offset; - pgoff_t index; - pgoff_t start_index = 0; - struct page **pages = NULL; - struct buffer_head *bh = NULL; - struct buffer_head *head = NULL; - unsigned int nr_pages = PAGE_SIZE / sizeof(struct page *); - - pages = kmalloc(PAGE_SIZE, GFP_KERNEL); - if (pages == NULL) - return -ENOMEM; - - offset = logical >> PAGE_SHIFT; -repeat: - last_offset = offset; - head = NULL; - ret = find_get_pages_tag(inode->i_mapping, &offset, - PAGECACHE_TAG_DIRTY, nr_pages, pages); - - if (!(flags & FIEMAP_EXTENT_DELALLOC)) { - /* First time, try to find a mapped buffer. */ - if (ret == 0) { -out: - for (index = 0; index < ret; index++) - page_cache_release(pages[index]); - /* just a hole. */ - kfree(pages); - return EXT_CONTINUE; - } - index = 0; - -next_page: - /* Try to find the 1st mapped buffer. */ - end = ((__u64)pages[index]->index << PAGE_SHIFT) >> - blksize_bits; - if (!page_has_buffers(pages[index])) - goto out; - head = page_buffers(pages[index]); - if (!head) - goto out; - - index++; - bh = head; - do { - if (end >= newex->ec_block + - newex->ec_len) - /* The buffer is out of - * the request range. - */ - goto out; - - if (buffer_mapped(bh) && - end >= newex->ec_block) { - start_index = index - 1; - /* get the 1st mapped buffer. */ - goto found_mapped_buffer; - } - - bh = bh->b_this_page; - end++; - } while (bh != head); - - /* No mapped buffer in the range found in this page, - * We need to look up next page. - */ - if (index >= ret) { - /* There is no page left, but we need to limit - * newex->ec_len. - */ - newex->ec_len = end - newex->ec_block; - goto out; - } - goto next_page; - } else { - /*Find contiguous delayed buffers. */ - if (ret > 0 && pages[0]->index == last_offset) - head = page_buffers(pages[0]); - bh = head; - index = 1; - start_index = 0; - } - -found_mapped_buffer: - if (bh != NULL && buffer_delay(bh)) { - /* 1st or contiguous delayed buffer found. */ - if (!(flags & FIEMAP_EXTENT_DELALLOC)) { - /* - * 1st delayed buffer found, record - * the start of extent. - */ - flags |= FIEMAP_EXTENT_DELALLOC; - newex->ec_block = end; - logical = (__u64)end << blksize_bits; - } - /* Find contiguous delayed buffers. */ - do { - if (!buffer_delay(bh)) - goto found_delayed_extent; - bh = bh->b_this_page; - end++; - } while (bh != head); - - for (; index < ret; index++) { - if (!page_has_buffers(pages[index])) { - bh = NULL; - break; - } - head = page_buffers(pages[index]); - if (!head) { - bh = NULL; - break; - } - - if (pages[index]->index != - pages[start_index]->index + index - - start_index) { - /* Blocks are not contiguous. */ - bh = NULL; - break; - } - bh = head; - do { - if (!buffer_delay(bh)) - /* Delayed-extent ends. */ - goto found_delayed_extent; - bh = bh->b_this_page; - end++; - } while (bh != head); - } - } else if (!(flags & FIEMAP_EXTENT_DELALLOC)) - /* a hole found. */ - goto out; + if (es.len == 0) + /* A hole found. */ + return 0; -found_delayed_extent: - newex->ec_len = min(end - newex->ec_block, - (ext4_lblk_t)EXT_INIT_MAX_LEN); - if (ret == nr_pages && bh != NULL && - newex->ec_len < EXT_INIT_MAX_LEN && - buffer_delay(bh)) { - /* Have not collected an extent and continue. */ - for (index = 0; index < ret; index++) - page_cache_release(pages[index]); - goto repeat; + if (es.start > newex->ec_block) { + /* A hole found. */ + newex->ec_len = min(es.start - newex->ec_block, + newex->ec_len); + return 0; } - for (index = 0; index < ret; index++) - page_cache_release(pages[index]); - kfree(pages); + newex->ec_len = es.start + es.len - newex->ec_block; } - physical = (__u64)newex->ec_start << blksize_bits; - length = (__u64)newex->ec_len << blksize_bits; - - if (ex && ext4_ext_is_uninitialized(ex)) - flags |= FIEMAP_EXTENT_UNWRITTEN; - - if (next == EXT_MAX_BLOCKS) - flags |= FIEMAP_EXTENT_LAST; - - ret = fiemap_fill_next_extent(fieinfo, logical, physical, - length, flags); - if (ret < 0) - return ret; - if (ret == 1) - return EXT_BREAK; - return EXT_CONTINUE; + return next_del; } /* fiemap flags we can handle specified here */ #define EXT4_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) @@ -4971,6 +4789,8 @@ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length) ext4_ext_invalidate_cache(inode); ext4_discard_preallocations(inode); + err = ext4_es_remove_extent(inode, first_block, + stop_block - first_block); err = ext4_ext_remove_space(inode, first_block, stop_block - 1); ext4_ext_invalidate_cache(inode); @@ -4991,12 +4811,22 @@ out_mutex: mutex_unlock(&inode->i_mutex); return err; } + int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len) { ext4_lblk_t start_blk; int error = 0; + if (ext4_has_inline_data(inode)) { + int has_inline = 1; + + error = ext4_inline_data_fiemap(inode, fieinfo, &has_inline); + + if (has_inline) + return error; + } + /* fallback to generic here if not in extents fmt */ if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) return generic_block_fiemap(inode, fieinfo, start, len, @@ -5018,11 +4848,11 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, len_blks = ((ext4_lblk_t) last_blk) - start_blk + 1; /* - * Walk the extent tree gathering extent information. - * ext4_ext_fiemap_cb will push extents back to user. + * Walk the extent tree gathering extent information + * and pushing extents back to the user. */ - error = ext4_ext_walk_space(inode, start_blk, len_blks, - ext4_ext_fiemap_cb, fieinfo); + error = ext4_fill_fiemap_extents(inode, start_blk, + len_blks, fieinfo); } return error; diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c new file mode 100644 index 00000000000..564d981a2fc --- /dev/null +++ b/fs/ext4/extents_status.c @@ -0,0 +1,500 @@ +/* + * fs/ext4/extents_status.c + * + * Written by Yongqiang Yang <xiaoqiangnk@gmail.com> + * Modified by + * Allison Henderson <achender@linux.vnet.ibm.com> + * Hugh Dickins <hughd@google.com> + * Zheng Liu <wenqing.lz@taobao.com> + * + * Ext4 extents status tree core functions. + */ +#include <linux/rbtree.h> +#include "ext4.h" +#include "extents_status.h" +#include "ext4_extents.h" + +#include <trace/events/ext4.h> + +/* + * According to previous discussion in Ext4 Developer Workshop, we + * will introduce a new structure called io tree to track all extent + * status in order to solve some problems that we have met + * (e.g. Reservation space warning), and provide extent-level locking. + * Delay extent tree is the first step to achieve this goal. It is + * original built by Yongqiang Yang. At that time it is called delay + * extent tree, whose goal is only track delay extent in memory to + * simplify the implementation of fiemap and bigalloc, and introduce + * lseek SEEK_DATA/SEEK_HOLE support. That is why it is still called + * delay extent tree at the following comment. But for better + * understand what it does, it has been rename to extent status tree. + * + * Currently the first step has been done. All delay extents are + * tracked in the tree. It maintains the delay extent when a delay + * allocation is issued, and the delay extent is written out or + * invalidated. Therefore the implementation of fiemap and bigalloc + * are simplified, and SEEK_DATA/SEEK_HOLE are introduced. + * + * The following comment describes the implemenmtation of extent + * status tree and future works. + */ + +/* + * extents status tree implementation for ext4. + * + * + * ========================================================================== + * Extents status encompass delayed extents and extent locks + * + * 1. Why delayed extent implementation ? + * + * Without delayed extent, ext4 identifies a delayed extent by looking + * up page cache, this has several deficiencies - complicated, buggy, + * and inefficient code. + * + * FIEMAP, SEEK_HOLE/DATA, bigalloc, punch hole and writeout all need + * to know if a block or a range of blocks are belonged to a delayed + * extent. + * + * Let us have a look at how they do without delayed extents implementation. + * -- FIEMAP + * FIEMAP looks up page cache to identify delayed allocations from holes. + * + * -- SEEK_HOLE/DATA + * SEEK_HOLE/DATA has the same problem as FIEMAP. + * + * -- bigalloc + * bigalloc looks up page cache to figure out if a block is + * already under delayed allocation or not to determine whether + * quota reserving is needed for the cluster. + * + * -- punch hole + * punch hole looks up page cache to identify a delayed extent. + * + * -- writeout + * Writeout looks up whole page cache to see if a buffer is + * mapped, If there are not very many delayed buffers, then it is + * time comsuming. + * + * With delayed extents implementation, FIEMAP, SEEK_HOLE/DATA, + * bigalloc and writeout can figure out if a block or a range of + * blocks is under delayed allocation(belonged to a delayed extent) or + * not by searching the delayed extent tree. + * + * + * ========================================================================== + * 2. ext4 delayed extents impelmentation + * + * -- delayed extent + * A delayed extent is a range of blocks which are contiguous + * logically and under delayed allocation. Unlike extent in + * ext4, delayed extent in ext4 is a in-memory struct, there is + * no corresponding on-disk data. There is no limit on length of + * delayed extent, so a delayed extent can contain as many blocks + * as they are contiguous logically. + * + * -- delayed extent tree + * Every inode has a delayed extent tree and all under delayed + * allocation blocks are added to the tree as delayed extents. + * Delayed extents in the tree are ordered by logical block no. + * + * -- operations on a delayed extent tree + * There are three operations on a delayed extent tree: find next + * delayed extent, adding a space(a range of blocks) and removing + * a space. + * + * -- race on a delayed extent tree + * Delayed extent tree is protected inode->i_es_lock. + * + * + * ========================================================================== + * 3. performance analysis + * -- overhead + * 1. There is a cache extent for write access, so if writes are + * not very random, adding space operaions are in O(1) time. + * + * -- gain + * 2. Code is much simpler, more readable, more maintainable and + * more efficient. + * + * + * ========================================================================== + * 4. TODO list + * -- Track all extent status + * + * -- Improve get block process + * + * -- Extent-level locking + */ + +static struct kmem_cache *ext4_es_cachep; + +int __init ext4_init_es(void) +{ + ext4_es_cachep = KMEM_CACHE(extent_status, SLAB_RECLAIM_ACCOUNT); + if (ext4_es_cachep == NULL) + return -ENOMEM; + return 0; +} + +void ext4_exit_es(void) +{ + if (ext4_es_cachep) + kmem_cache_destroy(ext4_es_cachep); +} + +void ext4_es_init_tree(struct ext4_es_tree *tree) +{ + tree->root = RB_ROOT; + tree->cache_es = NULL; +} + +#ifdef ES_DEBUG__ +static void ext4_es_print_tree(struct inode *inode) +{ + struct ext4_es_tree *tree; + struct rb_node *node; + + printk(KERN_DEBUG "status extents for inode %lu:", inode->i_ino); + tree = &EXT4_I(inode)->i_es_tree; + node = rb_first(&tree->root); + while (node) { + struct extent_status *es; + es = rb_entry(node, struct extent_status, rb_node); + printk(KERN_DEBUG " [%u/%u)", es->start, es->len); + node = rb_next(node); + } + printk(KERN_DEBUG "\n"); +} +#else +#define ext4_es_print_tree(inode) +#endif + +static inline ext4_lblk_t extent_status_end(struct extent_status *es) +{ + BUG_ON(es->start + es->len < es->start); + return es->start + es->len - 1; +} + +/* + * search through the tree for an delayed extent with a given offset. If + * it can't be found, try to find next extent. + */ +static struct extent_status *__es_tree_search(struct rb_root *root, + ext4_lblk_t offset) +{ + struct rb_node *node = root->rb_node; + struct extent_status *es = NULL; + + while (node) { + es = rb_entry(node, struct extent_status, rb_node); + if (offset < es->start) + node = node->rb_left; + else if (offset > extent_status_end(es)) + node = node->rb_right; + else + return es; + } + + if (es && offset < es->start) + return es; + + if (es && offset > extent_status_end(es)) { + node = rb_next(&es->rb_node); + return node ? rb_entry(node, struct extent_status, rb_node) : + NULL; + } + + return NULL; +} + +/* + * ext4_es_find_extent: find the 1st delayed extent covering @es->start + * if it exists, otherwise, the next extent after @es->start. + * + * @inode: the inode which owns delayed extents + * @es: delayed extent that we found + * + * Returns the first block of the next extent after es, otherwise + * EXT_MAX_BLOCKS if no delay extent is found. + * Delayed extent is returned via @es. + */ +ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es) +{ + struct ext4_es_tree *tree = NULL; + struct extent_status *es1 = NULL; + struct rb_node *node; + ext4_lblk_t ret = EXT_MAX_BLOCKS; + + trace_ext4_es_find_extent_enter(inode, es->start); + + read_lock(&EXT4_I(inode)->i_es_lock); + tree = &EXT4_I(inode)->i_es_tree; + + /* find delay extent in cache firstly */ + if (tree->cache_es) { + es1 = tree->cache_es; + if (in_range(es->start, es1->start, es1->len)) { + es_debug("%u cached by [%u/%u)\n", + es->start, es1->start, es1->len); + goto out; + } + } + + es->len = 0; + es1 = __es_tree_search(&tree->root, es->start); + +out: + if (es1) { + tree->cache_es = es1; + es->start = es1->start; + es->len = es1->len; + node = rb_next(&es1->rb_node); + if (node) { + es1 = rb_entry(node, struct extent_status, rb_node); + ret = es1->start; + } + } + + read_unlock(&EXT4_I(inode)->i_es_lock); + + trace_ext4_es_find_extent_exit(inode, es, ret); + return ret; +} + +static struct extent_status * +ext4_es_alloc_extent(ext4_lblk_t start, ext4_lblk_t len) +{ + struct extent_status *es; + es = kmem_cache_alloc(ext4_es_cachep, GFP_ATOMIC); + if (es == NULL) + return NULL; + es->start = start; + es->len = len; + return es; +} + +static void ext4_es_free_extent(struct extent_status *es) +{ + kmem_cache_free(ext4_es_cachep, es); +} + +static struct extent_status * +ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es) +{ + struct extent_status *es1; + struct rb_node *node; + + node = rb_prev(&es->rb_node); + if (!node) + return es; + + es1 = rb_entry(node, struct extent_status, rb_node); + if (es->start == extent_status_end(es1) + 1) { + es1->len += es->len; + rb_erase(&es->rb_node, &tree->root); + ext4_es_free_extent(es); + es = es1; + } + + return es; +} + +static struct extent_status * +ext4_es_try_to_merge_right(struct ext4_es_tree *tree, struct extent_status *es) +{ + struct extent_status *es1; + struct rb_node *node; + + node = rb_next(&es->rb_node); + if (!node) + return es; + + es1 = rb_entry(node, struct extent_status, rb_node); + if (es1->start == extent_status_end(es) + 1) { + es->len += es1->len; + rb_erase(node, &tree->root); + ext4_es_free_extent(es1); + } + + return es; +} + +static int __es_insert_extent(struct ext4_es_tree *tree, ext4_lblk_t offset, + ext4_lblk_t len) +{ + struct rb_node **p = &tree->root.rb_node; + struct rb_node *parent = NULL; + struct extent_status *es; + ext4_lblk_t end = offset + len - 1; + + BUG_ON(end < offset); + es = tree->cache_es; + if (es && offset == (extent_status_end(es) + 1)) { + es_debug("cached by [%u/%u)\n", es->start, es->len); + es->len += len; + es = ext4_es_try_to_merge_right(tree, es); + goto out; + } else if (es && es->start == end + 1) { + es_debug("cached by [%u/%u)\n", es->start, es->len); + es->start = offset; + es->len += len; + es = ext4_es_try_to_merge_left(tree, es); + goto out; + } else if (es && es->start <= offset && + end <= extent_status_end(es)) { + es_debug("cached by [%u/%u)\n", es->start, es->len); + goto out; + } + + while (*p) { + parent = *p; + es = rb_entry(parent, struct extent_status, rb_node); + + if (offset < es->start) { + if (es->start == end + 1) { + es->start = offset; + es->len += len; + es = ext4_es_try_to_merge_left(tree, es); + goto out; + } + p = &(*p)->rb_left; + } else if (offset > extent_status_end(es)) { + if (offset == extent_status_end(es) + 1) { + es->len += len; + es = ext4_es_try_to_merge_right(tree, es); + goto out; + } + p = &(*p)->rb_right; + } else { + if (extent_status_end(es) <= end) + es->len = offset - es->start + len; + goto out; + } + } + + es = ext4_es_alloc_extent(offset, len); + if (!es) + return -ENOMEM; + rb_link_node(&es->rb_node, parent, p); + rb_insert_color(&es->rb_node, &tree->root); + +out: + tree->cache_es = es; + return 0; +} + +/* + * ext4_es_insert_extent() adds a space to a delayed extent tree. + * Caller holds inode->i_es_lock. + * + * ext4_es_insert_extent is called by ext4_da_write_begin and + * ext4_es_remove_extent. + * + * Return 0 on success, error code on failure. + */ +int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t offset, + ext4_lblk_t len) +{ + struct ext4_es_tree *tree; + int err = 0; + + trace_ext4_es_insert_extent(inode, offset, len); + es_debug("add [%u/%u) to extent status tree of inode %lu\n", + offset, len, inode->i_ino); + + write_lock(&EXT4_I(inode)->i_es_lock); + tree = &EXT4_I(inode)->i_es_tree; + err = __es_insert_extent(tree, offset, len); + write_unlock(&EXT4_I(inode)->i_es_lock); + + ext4_es_print_tree(inode); + + return err; +} + +/* + * ext4_es_remove_extent() removes a space from a delayed extent tree. + * Caller holds inode->i_es_lock. + * + * Return 0 on success, error code on failure. + */ +int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t offset, + ext4_lblk_t len) +{ + struct rb_node *node; + struct ext4_es_tree *tree; + struct extent_status *es; + struct extent_status orig_es; + ext4_lblk_t len1, len2, end; + int err = 0; + + trace_ext4_es_remove_extent(inode, offset, len); + es_debug("remove [%u/%u) from extent status tree of inode %lu\n", + offset, len, inode->i_ino); + + end = offset + len - 1; + BUG_ON(end < offset); + write_lock(&EXT4_I(inode)->i_es_lock); + tree = &EXT4_I(inode)->i_es_tree; + es = __es_tree_search(&tree->root, offset); + if (!es) + goto out; + if (es->start > end) + goto out; + + /* Simply invalidate cache_es. */ + tree->cache_es = NULL; + + orig_es.start = es->start; + orig_es.len = es->len; + len1 = offset > es->start ? offset - es->start : 0; + len2 = extent_status_end(es) > end ? + extent_status_end(es) - end : 0; + if (len1 > 0) + es->len = len1; + if (len2 > 0) { + if (len1 > 0) { + err = __es_insert_extent(tree, end + 1, len2); + if (err) { + es->start = orig_es.start; + es->len = orig_es.len; + goto out; + } + } else { + es->start = end + 1; + es->len = len2; + } + goto out; + } + + if (len1 > 0) { + node = rb_next(&es->rb_node); + if (node) + es = rb_entry(node, struct extent_status, rb_node); + else + es = NULL; + } + + while (es && extent_status_end(es) <= end) { + node = rb_next(&es->rb_node); + rb_erase(&es->rb_node, &tree->root); + ext4_es_free_extent(es); + if (!node) { + es = NULL; + break; + } + es = rb_entry(node, struct extent_status, rb_node); + } + + if (es && es->start < end + 1) { + len1 = extent_status_end(es) - end; + es->start = end + 1; + es->len = len1; + } + +out: + write_unlock(&EXT4_I(inode)->i_es_lock); + ext4_es_print_tree(inode); + return err; +} diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h new file mode 100644 index 00000000000..077f82db092 --- /dev/null +++ b/fs/ext4/extents_status.h @@ -0,0 +1,45 @@ +/* + * fs/ext4/extents_status.h + * + * Written by Yongqiang Yang <xiaoqiangnk@gmail.com> + * Modified by + * Allison Henderson <achender@linux.vnet.ibm.com> + * Zheng Liu <wenqing.lz@taobao.com> + * + */ + +#ifndef _EXT4_EXTENTS_STATUS_H +#define _EXT4_EXTENTS_STATUS_H + +/* + * Turn on ES_DEBUG__ to get lots of info about extent status operations. + */ +#ifdef ES_DEBUG__ +#define es_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) +#else +#define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +struct extent_status { + struct rb_node rb_node; + ext4_lblk_t start; /* first block extent covers */ + ext4_lblk_t len; /* length of extent in block */ +}; + +struct ext4_es_tree { + struct rb_root root; + struct extent_status *cache_es; /* recently accessed extent */ +}; + +extern int __init ext4_init_es(void); +extern void ext4_exit_es(void); +extern void ext4_es_init_tree(struct ext4_es_tree *tree); + +extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t start, + ext4_lblk_t len); +extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t start, + ext4_lblk_t len); +extern ext4_lblk_t ext4_es_find_extent(struct inode *inode, + struct extent_status *es); + +#endif /* _EXT4_EXTENTS_STATUS_H */ diff --git a/fs/ext4/file.c b/fs/ext4/file.c index bf3966bccd3..405565a6227 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -24,6 +24,7 @@ #include <linux/mount.h> #include <linux/path.h> #include <linux/quotaops.h> +#include <linux/pagevec.h> #include "ext4.h" #include "ext4_jbd2.h" #include "xattr.h" @@ -107,14 +108,6 @@ ext4_file_dio_write(struct kiocb *iocb, const struct iovec *iov, /* Unaligned direct AIO must be serialized; see comment above */ if (unaligned_aio) { - static unsigned long unaligned_warn_time; - - /* Warn about this once per day */ - if (printk_timed_ratelimit(&unaligned_warn_time, 60*60*24*HZ)) - ext4_msg(inode->i_sb, KERN_WARNING, - "Unaligned AIO/DIO on inode %ld by %s; " - "performance will be poor.", - inode->i_ino, current->comm); mutex_lock(ext4_aio_mutex(inode)); ext4_unwritten_wait(inode); } @@ -286,11 +279,329 @@ static int ext4_file_open(struct inode * inode, struct file * filp) } /* + * Here we use ext4_map_blocks() to get a block mapping for a extent-based + * file rather than ext4_ext_walk_space() because we can introduce + * SEEK_DATA/SEEK_HOLE for block-mapped and extent-mapped file at the same + * function. When extent status tree has been fully implemented, it will + * track all extent status for a file and we can directly use it to + * retrieve the offset for SEEK_DATA/SEEK_HOLE. + */ + +/* + * When we retrieve the offset for SEEK_DATA/SEEK_HOLE, we would need to + * lookup page cache to check whether or not there has some data between + * [startoff, endoff] because, if this range contains an unwritten extent, + * we determine this extent as a data or a hole according to whether the + * page cache has data or not. + */ +static int ext4_find_unwritten_pgoff(struct inode *inode, + int whence, + struct ext4_map_blocks *map, + loff_t *offset) +{ + struct pagevec pvec; + unsigned int blkbits; + pgoff_t index; + pgoff_t end; + loff_t endoff; + loff_t startoff; + loff_t lastoff; + int found = 0; + + blkbits = inode->i_sb->s_blocksize_bits; + startoff = *offset; + lastoff = startoff; + endoff = (map->m_lblk + map->m_len) << blkbits; + + index = startoff >> PAGE_CACHE_SHIFT; + end = endoff >> PAGE_CACHE_SHIFT; + + pagevec_init(&pvec, 0); + do { + int i, num; + unsigned long nr_pages; + + num = min_t(pgoff_t, end - index, PAGEVEC_SIZE); + nr_pages = pagevec_lookup(&pvec, inode->i_mapping, index, + (pgoff_t)num); + if (nr_pages == 0) { + if (whence == SEEK_DATA) + break; + + BUG_ON(whence != SEEK_HOLE); + /* + * If this is the first time to go into the loop and + * offset is not beyond the end offset, it will be a + * hole at this offset + */ + if (lastoff == startoff || lastoff < endoff) + found = 1; + break; + } + + /* + * If this is the first time to go into the loop and + * offset is smaller than the first page offset, it will be a + * hole at this offset. + */ + if (lastoff == startoff && whence == SEEK_HOLE && + lastoff < page_offset(pvec.pages[0])) { + found = 1; + break; + } + + for (i = 0; i < nr_pages; i++) { + struct page *page = pvec.pages[i]; + struct buffer_head *bh, *head; + + /* + * If the current offset is not beyond the end of given + * range, it will be a hole. + */ + if (lastoff < endoff && whence == SEEK_HOLE && + page->index > end) { + found = 1; + *offset = lastoff; + goto out; + } + + lock_page(page); + + if (unlikely(page->mapping != inode->i_mapping)) { + unlock_page(page); + continue; + } + + if (!page_has_buffers(page)) { + unlock_page(page); + continue; + } + + if (page_has_buffers(page)) { + lastoff = page_offset(page); + bh = head = page_buffers(page); + do { + if (buffer_uptodate(bh) || + buffer_unwritten(bh)) { + if (whence == SEEK_DATA) + found = 1; + } else { + if (whence == SEEK_HOLE) + found = 1; + } + if (found) { + *offset = max_t(loff_t, + startoff, lastoff); + unlock_page(page); + goto out; + } + lastoff += bh->b_size; + bh = bh->b_this_page; + } while (bh != head); + } + + lastoff = page_offset(page) + PAGE_SIZE; + unlock_page(page); + } + + /* + * The no. of pages is less than our desired, that would be a + * hole in there. + */ + if (nr_pages < num && whence == SEEK_HOLE) { + found = 1; + *offset = lastoff; + break; + } + + index = pvec.pages[i - 1]->index + 1; + pagevec_release(&pvec); + } while (index <= end); + +out: + pagevec_release(&pvec); + return found; +} + +/* + * ext4_seek_data() retrieves the offset for SEEK_DATA. + */ +static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize) +{ + struct inode *inode = file->f_mapping->host; + struct ext4_map_blocks map; + struct extent_status es; + ext4_lblk_t start, last, end; + loff_t dataoff, isize; + int blkbits; + int ret = 0; + + mutex_lock(&inode->i_mutex); + + isize = i_size_read(inode); + if (offset >= isize) { + mutex_unlock(&inode->i_mutex); + return -ENXIO; + } + + blkbits = inode->i_sb->s_blocksize_bits; + start = offset >> blkbits; + last = start; + end = isize >> blkbits; + dataoff = offset; + + do { + map.m_lblk = last; + map.m_len = end - last + 1; + ret = ext4_map_blocks(NULL, inode, &map, 0); + if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) { + if (last != start) + dataoff = last << blkbits; + break; + } + + /* + * If there is a delay extent at this offset, + * it will be as a data. + */ + es.start = last; + (void)ext4_es_find_extent(inode, &es); + if (last >= es.start && + last < es.start + es.len) { + if (last != start) + dataoff = last << blkbits; + break; + } + + /* + * If there is a unwritten extent at this offset, + * it will be as a data or a hole according to page + * cache that has data or not. + */ + if (map.m_flags & EXT4_MAP_UNWRITTEN) { + int unwritten; + unwritten = ext4_find_unwritten_pgoff(inode, SEEK_DATA, + &map, &dataoff); + if (unwritten) + break; + } + + last++; + dataoff = last << blkbits; + } while (last <= end); + + mutex_unlock(&inode->i_mutex); + + if (dataoff > isize) + return -ENXIO; + + if (dataoff < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET)) + return -EINVAL; + if (dataoff > maxsize) + return -EINVAL; + + if (dataoff != file->f_pos) { + file->f_pos = dataoff; + file->f_version = 0; + } + + return dataoff; +} + +/* + * ext4_seek_hole() retrieves the offset for SEEK_HOLE. + */ +static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize) +{ + struct inode *inode = file->f_mapping->host; + struct ext4_map_blocks map; + struct extent_status es; + ext4_lblk_t start, last, end; + loff_t holeoff, isize; + int blkbits; + int ret = 0; + + mutex_lock(&inode->i_mutex); + + isize = i_size_read(inode); + if (offset >= isize) { + mutex_unlock(&inode->i_mutex); + return -ENXIO; + } + + blkbits = inode->i_sb->s_blocksize_bits; + start = offset >> blkbits; + last = start; + end = isize >> blkbits; + holeoff = offset; + + do { + map.m_lblk = last; + map.m_len = end - last + 1; + ret = ext4_map_blocks(NULL, inode, &map, 0); + if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) { + last += ret; + holeoff = last << blkbits; + continue; + } + + /* + * If there is a delay extent at this offset, + * we will skip this extent. + */ + es.start = last; + (void)ext4_es_find_extent(inode, &es); + if (last >= es.start && + last < es.start + es.len) { + last = es.start + es.len; + holeoff = last << blkbits; + continue; + } + + /* + * If there is a unwritten extent at this offset, + * it will be as a data or a hole according to page + * cache that has data or not. + */ + if (map.m_flags & EXT4_MAP_UNWRITTEN) { + int unwritten; + unwritten = ext4_find_unwritten_pgoff(inode, SEEK_HOLE, + &map, &holeoff); + if (!unwritten) { + last += ret; + holeoff = last << blkbits; + continue; + } + } + + /* find a hole */ + break; + } while (last <= end); + + mutex_unlock(&inode->i_mutex); + + if (holeoff > isize) + holeoff = isize; + + if (holeoff < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET)) + return -EINVAL; + if (holeoff > maxsize) + return -EINVAL; + + if (holeoff != file->f_pos) { + file->f_pos = holeoff; + file->f_version = 0; + } + + return holeoff; +} + +/* * ext4_llseek() handles both block-mapped and extent-mapped maxbytes values * by calling generic_file_llseek_size() with the appropriate maxbytes * value for each. */ -loff_t ext4_llseek(struct file *file, loff_t offset, int origin) +loff_t ext4_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; loff_t maxbytes; @@ -300,8 +611,19 @@ loff_t ext4_llseek(struct file *file, loff_t offset, int origin) else maxbytes = inode->i_sb->s_maxbytes; - return generic_file_llseek_size(file, offset, origin, - maxbytes, i_size_read(inode)); + switch (whence) { + case SEEK_SET: + case SEEK_CUR: + case SEEK_END: + return generic_file_llseek_size(file, offset, whence, + maxbytes, i_size_read(inode)); + case SEEK_DATA: + return ext4_seek_data(file, offset, maxbytes); + case SEEK_HOLE: + return ext4_seek_hole(file, offset, maxbytes); + } + + return -EINVAL; } const struct file_operations ext4_file_operations = { @@ -326,12 +648,10 @@ const struct file_operations ext4_file_operations = { const struct inode_operations ext4_file_inode_operations = { .setattr = ext4_setattr, .getattr = ext4_getattr, -#ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, .listxattr = ext4_listxattr, .removexattr = generic_removexattr, -#endif .get_acl = ext4_get_acl, .fiemap = ext4_fiemap, }; diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c index be1d89f385b..3278e64e57b 100644 --- a/fs/ext4/fsync.c +++ b/fs/ext4/fsync.c @@ -44,7 +44,6 @@ */ static int ext4_sync_parent(struct inode *inode) { - struct writeback_control wbc; struct dentry *dentry = NULL; struct inode *next; int ret = 0; @@ -66,10 +65,7 @@ static int ext4_sync_parent(struct inode *inode) ret = sync_mapping_buffers(inode->i_mapping); if (ret) break; - memset(&wbc, 0, sizeof(wbc)); - wbc.sync_mode = WB_SYNC_ALL; - wbc.nr_to_write = 0; /* only write out the inode */ - ret = sync_inode(inode, &wbc); + ret = sync_inode_metadata(inode, 1); if (ret) break; } @@ -113,8 +109,6 @@ static int __sync_inode(struct inode *inode, int datasync) * * What we do is just kick off a commit and wait on it. This will snapshot the * inode to disk. - * - * i_mutex lock is held when entering and exiting this function */ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync) diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 4facdd29a35..3f32c801244 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -725,6 +725,10 @@ repeat_in_this_group: "inode=%lu", ino + 1); continue; } + BUFFER_TRACE(inode_bitmap_bh, "get_write_access"); + err = ext4_journal_get_write_access(handle, inode_bitmap_bh); + if (err) + goto fail; ext4_lock_group(sb, group); ret2 = ext4_test_and_set_bit(ino, inode_bitmap_bh->b_data); ext4_unlock_group(sb, group); @@ -738,6 +742,11 @@ repeat_in_this_group: goto out; got: + BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata"); + err = ext4_handle_dirty_metadata(handle, NULL, inode_bitmap_bh); + if (err) + goto fail; + /* We may have to initialize the block bitmap if it isn't already */ if (ext4_has_group_desc_csum(sb) && gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { @@ -753,7 +762,6 @@ got: BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh); - brelse(block_bitmap_bh); /* recheck and clear flag under lock if we still need to */ ext4_lock_group(sb, group); @@ -766,16 +774,12 @@ got: ext4_group_desc_csum_set(sb, group, gdp); } ext4_unlock_group(sb, group); + brelse(block_bitmap_bh); if (err) goto fail; } - BUFFER_TRACE(inode_bitmap_bh, "get_write_access"); - err = ext4_journal_get_write_access(handle, inode_bitmap_bh); - if (err) - goto fail; - BUFFER_TRACE(group_desc_bh, "get_write_access"); err = ext4_journal_get_write_access(handle, group_desc_bh); if (err) @@ -823,11 +827,6 @@ got: } ext4_unlock_group(sb, group); - BUFFER_TRACE(inode_bitmap_bh, "call ext4_handle_dirty_metadata"); - err = ext4_handle_dirty_metadata(handle, NULL, inode_bitmap_bh); - if (err) - goto fail; - BUFFER_TRACE(group_desc_bh, "call ext4_handle_dirty_metadata"); err = ext4_handle_dirty_metadata(handle, NULL, group_desc_bh); if (err) @@ -903,6 +902,10 @@ got: ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize; + ei->i_inline_off = 0; + if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_INLINE_DATA)) + ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); + ret = inode; dquot_initialize(inode); err = dquot_alloc_inode(inode); diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index 792e388e7b4..20862f96e8a 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -22,6 +22,7 @@ #include "ext4_jbd2.h" #include "truncate.h" +#include "ext4_extents.h" /* Needed for EXT_MAX_BLOCKS */ #include <trace/events/ext4.h> @@ -755,8 +756,7 @@ cleanup: partial--; } out: - trace_ext4_ind_map_blocks_exit(inode, map->m_lblk, - map->m_pblk, map->m_len, err); + trace_ext4_ind_map_blocks_exit(inode, map, err); return err; } @@ -1412,6 +1412,7 @@ void ext4_ind_truncate(struct inode *inode) down_write(&ei->i_data_sem); ext4_discard_preallocations(inode); + ext4_es_remove_extent(inode, last_block, EXT_MAX_BLOCKS - last_block); /* * The orphan list entry will now protect us from any crash which diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c new file mode 100644 index 00000000000..387c47c6cda --- /dev/null +++ b/fs/ext4/inline.c @@ -0,0 +1,1884 @@ +/* + * Copyright (c) 2012 Taobao. + * Written by Tao Ma <boyu.mt@taobao.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2.1 of the GNU Lesser General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include "ext4_jbd2.h" +#include "ext4.h" +#include "xattr.h" +#include "truncate.h" +#include <linux/fiemap.h> + +#define EXT4_XATTR_SYSTEM_DATA "data" +#define EXT4_MIN_INLINE_DATA_SIZE ((sizeof(__le32) * EXT4_N_BLOCKS)) +#define EXT4_INLINE_DOTDOT_SIZE 4 + +int ext4_get_inline_size(struct inode *inode) +{ + if (EXT4_I(inode)->i_inline_off) + return EXT4_I(inode)->i_inline_size; + + return 0; +} + +static int get_max_inline_xattr_value_size(struct inode *inode, + struct ext4_iloc *iloc) +{ + struct ext4_xattr_ibody_header *header; + struct ext4_xattr_entry *entry; + struct ext4_inode *raw_inode; + int free, min_offs; + + min_offs = EXT4_SB(inode->i_sb)->s_inode_size - + EXT4_GOOD_OLD_INODE_SIZE - + EXT4_I(inode)->i_extra_isize - + sizeof(struct ext4_xattr_ibody_header); + + /* + * We need to subtract another sizeof(__u32) since an in-inode xattr + * needs an empty 4 bytes to indicate the gap between the xattr entry + * and the name/value pair. + */ + if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR)) + return EXT4_XATTR_SIZE(min_offs - + EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA)) - + EXT4_XATTR_ROUND - sizeof(__u32)); + + raw_inode = ext4_raw_inode(iloc); + header = IHDR(inode, raw_inode); + entry = IFIRST(header); + + /* Compute min_offs. */ + for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) { + if (!entry->e_value_block && entry->e_value_size) { + size_t offs = le16_to_cpu(entry->e_value_offs); + if (offs < min_offs) + min_offs = offs; + } + } + free = min_offs - + ((void *)entry - (void *)IFIRST(header)) - sizeof(__u32); + + if (EXT4_I(inode)->i_inline_off) { + entry = (struct ext4_xattr_entry *) + ((void *)raw_inode + EXT4_I(inode)->i_inline_off); + + free += le32_to_cpu(entry->e_value_size); + goto out; + } + + free -= EXT4_XATTR_LEN(strlen(EXT4_XATTR_SYSTEM_DATA)); + + if (free > EXT4_XATTR_ROUND) + free = EXT4_XATTR_SIZE(free - EXT4_XATTR_ROUND); + else + free = 0; + +out: + return free; +} + +/* + * Get the maximum size we now can store in an inode. + * If we can't find the space for a xattr entry, don't use the space + * of the extents since we have no space to indicate the inline data. + */ +int ext4_get_max_inline_size(struct inode *inode) +{ + int error, max_inline_size; + struct ext4_iloc iloc; + + if (EXT4_I(inode)->i_extra_isize == 0) + return 0; + + error = ext4_get_inode_loc(inode, &iloc); + if (error) { + ext4_error_inode(inode, __func__, __LINE__, 0, + "can't get inode location %lu", + inode->i_ino); + return 0; + } + + down_read(&EXT4_I(inode)->xattr_sem); + max_inline_size = get_max_inline_xattr_value_size(inode, &iloc); + up_read(&EXT4_I(inode)->xattr_sem); + + brelse(iloc.bh); + + if (!max_inline_size) + return 0; + + return max_inline_size + EXT4_MIN_INLINE_DATA_SIZE; +} + +int ext4_has_inline_data(struct inode *inode) +{ + return ext4_test_inode_flag(inode, EXT4_INODE_INLINE_DATA) && + EXT4_I(inode)->i_inline_off; +} + +/* + * this function does not take xattr_sem, which is OK because it is + * currently only used in a code path coming form ext4_iget, before + * the new inode has been unlocked + */ +int ext4_find_inline_data_nolock(struct inode *inode) +{ + struct ext4_xattr_ibody_find is = { + .s = { .not_found = -ENODATA, }, + }; + struct ext4_xattr_info i = { + .name_index = EXT4_XATTR_INDEX_SYSTEM, + .name = EXT4_XATTR_SYSTEM_DATA, + }; + int error; + + if (EXT4_I(inode)->i_extra_isize == 0) + return 0; + + error = ext4_get_inode_loc(inode, &is.iloc); + if (error) + return error; + + error = ext4_xattr_ibody_find(inode, &i, &is); + if (error) + goto out; + + if (!is.s.not_found) { + EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here - + (void *)ext4_raw_inode(&is.iloc)); + EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE + + le32_to_cpu(is.s.here->e_value_size); + ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); + } +out: + brelse(is.iloc.bh); + return error; +} + +static int ext4_read_inline_data(struct inode *inode, void *buffer, + unsigned int len, + struct ext4_iloc *iloc) +{ + struct ext4_xattr_entry *entry; + struct ext4_xattr_ibody_header *header; + int cp_len = 0; + struct ext4_inode *raw_inode; + + if (!len) + return 0; + + BUG_ON(len > EXT4_I(inode)->i_inline_size); + + cp_len = len < EXT4_MIN_INLINE_DATA_SIZE ? + len : EXT4_MIN_INLINE_DATA_SIZE; + + raw_inode = ext4_raw_inode(iloc); + memcpy(buffer, (void *)(raw_inode->i_block), cp_len); + + len -= cp_len; + buffer += cp_len; + + if (!len) + goto out; + + header = IHDR(inode, raw_inode); + entry = (struct ext4_xattr_entry *)((void *)raw_inode + + EXT4_I(inode)->i_inline_off); + len = min_t(unsigned int, len, + (unsigned int)le32_to_cpu(entry->e_value_size)); + + memcpy(buffer, + (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs), len); + cp_len += len; + +out: + return cp_len; +} + +/* + * write the buffer to the inline inode. + * If 'create' is set, we don't need to do the extra copy in the xattr + * value since it is already handled by ext4_xattr_ibody_inline_set. + * That saves us one memcpy. + */ +void ext4_write_inline_data(struct inode *inode, struct ext4_iloc *iloc, + void *buffer, loff_t pos, unsigned int len) +{ + struct ext4_xattr_entry *entry; + struct ext4_xattr_ibody_header *header; + struct ext4_inode *raw_inode; + int cp_len = 0; + + BUG_ON(!EXT4_I(inode)->i_inline_off); + BUG_ON(pos + len > EXT4_I(inode)->i_inline_size); + + raw_inode = ext4_raw_inode(iloc); + buffer += pos; + + if (pos < EXT4_MIN_INLINE_DATA_SIZE) { + cp_len = pos + len > EXT4_MIN_INLINE_DATA_SIZE ? + EXT4_MIN_INLINE_DATA_SIZE - pos : len; + memcpy((void *)raw_inode->i_block + pos, buffer, cp_len); + + len -= cp_len; + buffer += cp_len; + pos += cp_len; + } + + if (!len) + return; + + pos -= EXT4_MIN_INLINE_DATA_SIZE; + header = IHDR(inode, raw_inode); + entry = (struct ext4_xattr_entry *)((void *)raw_inode + + EXT4_I(inode)->i_inline_off); + + memcpy((void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs) + pos, + buffer, len); +} + +static int ext4_create_inline_data(handle_t *handle, + struct inode *inode, unsigned len) +{ + int error; + void *value = NULL; + struct ext4_xattr_ibody_find is = { + .s = { .not_found = -ENODATA, }, + }; + struct ext4_xattr_info i = { + .name_index = EXT4_XATTR_INDEX_SYSTEM, + .name = EXT4_XATTR_SYSTEM_DATA, + }; + + error = ext4_get_inode_loc(inode, &is.iloc); + if (error) + return error; + + error = ext4_journal_get_write_access(handle, is.iloc.bh); + if (error) + goto out; + + if (len > EXT4_MIN_INLINE_DATA_SIZE) { + value = EXT4_ZERO_XATTR_VALUE; + len -= EXT4_MIN_INLINE_DATA_SIZE; + } else { + value = ""; + len = 0; + } + + /* Insert the the xttr entry. */ + i.value = value; + i.value_len = len; + + error = ext4_xattr_ibody_find(inode, &i, &is); + if (error) + goto out; + + BUG_ON(!is.s.not_found); + + error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is); + if (error) { + if (error == -ENOSPC) + ext4_clear_inode_state(inode, + EXT4_STATE_MAY_INLINE_DATA); + goto out; + } + + memset((void *)ext4_raw_inode(&is.iloc)->i_block, + 0, EXT4_MIN_INLINE_DATA_SIZE); + + EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here - + (void *)ext4_raw_inode(&is.iloc)); + EXT4_I(inode)->i_inline_size = len + EXT4_MIN_INLINE_DATA_SIZE; + ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS); + ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA); + get_bh(is.iloc.bh); + error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); + +out: + brelse(is.iloc.bh); + return error; +} + +static int ext4_update_inline_data(handle_t *handle, struct inode *inode, + unsigned int len) +{ + int error; + void *value = NULL; + struct ext4_xattr_ibody_find is = { + .s = { .not_found = -ENODATA, }, + }; + struct ext4_xattr_info i = { + .name_index = EXT4_XATTR_INDEX_SYSTEM, + .name = EXT4_XATTR_SYSTEM_DATA, + }; + + /* If the old space is ok, write the data directly. */ + if (len <= EXT4_I(inode)->i_inline_size) + return 0; + + error = ext4_get_inode_loc(inode, &is.iloc); + if (error) + return error; + + error = ext4_xattr_ibody_find(inode, &i, &is); + if (error) + goto out; + + BUG_ON(is.s.not_found); + + len -= EXT4_MIN_INLINE_DATA_SIZE; + value = kzalloc(len, GFP_NOFS); + if (!value) + goto out; + + error = ext4_xattr_ibody_get(inode, i.name_index, i.name, + value, len); + if (error == -ENODATA) + goto out; + + error = ext4_journal_get_write_access(handle, is.iloc.bh); + if (error) + goto out; + + /* Update the xttr entry. */ + i.value = value; + i.value_len = len; + + error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is); + if (error) + goto out; + + EXT4_I(inode)->i_inline_off = (u16)((void *)is.s.here - + (void *)ext4_raw_inode(&is.iloc)); + EXT4_I(inode)->i_inline_size = EXT4_MIN_INLINE_DATA_SIZE + + le32_to_cpu(is.s.here->e_value_size); + ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); + get_bh(is.iloc.bh); + error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); + +out: + kfree(value); + brelse(is.iloc.bh); + return error; +} + +int ext4_prepare_inline_data(handle_t *handle, struct inode *inode, + unsigned int len) +{ + int ret, size; + struct ext4_inode_info *ei = EXT4_I(inode); + + if (!ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) + return -ENOSPC; + + size = ext4_get_max_inline_size(inode); + if (size < len) + return -ENOSPC; + + down_write(&EXT4_I(inode)->xattr_sem); + + if (ei->i_inline_off) + ret = ext4_update_inline_data(handle, inode, len); + else + ret = ext4_create_inline_data(handle, inode, len); + + up_write(&EXT4_I(inode)->xattr_sem); + + return ret; +} + +static int ext4_destroy_inline_data_nolock(handle_t *handle, + struct inode *inode) +{ + struct ext4_inode_info *ei = EXT4_I(inode); + struct ext4_xattr_ibody_find is = { + .s = { .not_found = 0, }, + }; + struct ext4_xattr_info i = { + .name_index = EXT4_XATTR_INDEX_SYSTEM, + .name = EXT4_XATTR_SYSTEM_DATA, + .value = NULL, + .value_len = 0, + }; + int error; + + if (!ei->i_inline_off) + return 0; + + error = ext4_get_inode_loc(inode, &is.iloc); + if (error) + return error; + + error = ext4_xattr_ibody_find(inode, &i, &is); + if (error) + goto out; + + error = ext4_journal_get_write_access(handle, is.iloc.bh); + if (error) + goto out; + + error = ext4_xattr_ibody_inline_set(handle, inode, &i, &is); + if (error) + goto out; + + memset((void *)ext4_raw_inode(&is.iloc)->i_block, + 0, EXT4_MIN_INLINE_DATA_SIZE); + + if (EXT4_HAS_INCOMPAT_FEATURE(inode->i_sb, + EXT4_FEATURE_INCOMPAT_EXTENTS)) { + if (S_ISDIR(inode->i_mode) || + S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) { + ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS); + ext4_ext_tree_init(handle, inode); + } + } + ext4_clear_inode_flag(inode, EXT4_INODE_INLINE_DATA); + + get_bh(is.iloc.bh); + error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); + + EXT4_I(inode)->i_inline_off = 0; + EXT4_I(inode)->i_inline_size = 0; + ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); +out: + brelse(is.iloc.bh); + if (error == -ENODATA) + error = 0; + return error; +} + +static int ext4_read_inline_page(struct inode *inode, struct page *page) +{ + void *kaddr; + int ret = 0; + size_t len; + struct ext4_iloc iloc; + + BUG_ON(!PageLocked(page)); + BUG_ON(!ext4_has_inline_data(inode)); + BUG_ON(page->index); + + if (!EXT4_I(inode)->i_inline_off) { + ext4_warning(inode->i_sb, "inode %lu doesn't have inline data.", + inode->i_ino); + goto out; + } + + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) + goto out; + + len = min_t(size_t, ext4_get_inline_size(inode), i_size_read(inode)); + kaddr = kmap_atomic(page); + ret = ext4_read_inline_data(inode, kaddr, len, &iloc); + flush_dcache_page(page); + kunmap_atomic(kaddr); + zero_user_segment(page, len, PAGE_CACHE_SIZE); + SetPageUptodate(page); + brelse(iloc.bh); + +out: + return ret; +} + +int ext4_readpage_inline(struct inode *inode, struct page *page) +{ + int ret = 0; + + down_read(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + up_read(&EXT4_I(inode)->xattr_sem); + return -EAGAIN; + } + + /* + * Current inline data can only exist in the 1st page, + * So for all the other pages, just set them uptodate. + */ + if (!page->index) + ret = ext4_read_inline_page(inode, page); + else if (!PageUptodate(page)) { + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + SetPageUptodate(page); + } + + up_read(&EXT4_I(inode)->xattr_sem); + + unlock_page(page); + return ret >= 0 ? 0 : ret; +} + +static int ext4_convert_inline_data_to_extent(struct address_space *mapping, + struct inode *inode, + unsigned flags) +{ + int ret, needed_blocks; + handle_t *handle = NULL; + int retries = 0, sem_held = 0; + struct page *page = NULL; + unsigned from, to; + struct ext4_iloc iloc; + + if (!ext4_has_inline_data(inode)) { + /* + * clear the flag so that no new write + * will trap here again. + */ + ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); + return 0; + } + + needed_blocks = ext4_writepage_trans_blocks(inode); + + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) + return ret; + +retry: + handle = ext4_journal_start(inode, needed_blocks); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + handle = NULL; + goto out; + } + + /* We cannot recurse into the filesystem as the transaction is already + * started */ + flags |= AOP_FLAG_NOFS; + + page = grab_cache_page_write_begin(mapping, 0, flags); + if (!page) { + ret = -ENOMEM; + goto out; + } + + down_write(&EXT4_I(inode)->xattr_sem); + sem_held = 1; + /* If some one has already done this for us, just exit. */ + if (!ext4_has_inline_data(inode)) { + ret = 0; + goto out; + } + + from = 0; + to = ext4_get_inline_size(inode); + if (!PageUptodate(page)) { + ret = ext4_read_inline_page(inode, page); + if (ret < 0) + goto out; + } + + ret = ext4_destroy_inline_data_nolock(handle, inode); + if (ret) + goto out; + + if (ext4_should_dioread_nolock(inode)) + ret = __block_write_begin(page, from, to, ext4_get_block_write); + else + ret = __block_write_begin(page, from, to, ext4_get_block); + + if (!ret && ext4_should_journal_data(inode)) { + ret = ext4_walk_page_buffers(handle, page_buffers(page), + from, to, NULL, + do_journal_get_write_access); + } + + if (ret) { + unlock_page(page); + page_cache_release(page); + ext4_orphan_add(handle, inode); + up_write(&EXT4_I(inode)->xattr_sem); + sem_held = 0; + ext4_journal_stop(handle); + handle = NULL; + ext4_truncate_failed_write(inode); + /* + * If truncate failed early the inode might + * still be on the orphan list; we need to + * make sure the inode is removed from the + * orphan list in that case. + */ + if (inode->i_nlink) + ext4_orphan_del(NULL, inode); + } + + if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) + goto retry; + + block_commit_write(page, from, to); +out: + if (page) { + unlock_page(page); + page_cache_release(page); + } + if (sem_held) + up_write(&EXT4_I(inode)->xattr_sem); + if (handle) + ext4_journal_stop(handle); + brelse(iloc.bh); + return ret; +} + +/* + * Try to write data in the inode. + * If the inode has inline data, check whether the new write can be + * in the inode also. If not, create the page the handle, move the data + * to the page make it update and let the later codes create extent for it. + */ +int ext4_try_to_write_inline_data(struct address_space *mapping, + struct inode *inode, + loff_t pos, unsigned len, + unsigned flags, + struct page **pagep) +{ + int ret; + handle_t *handle; + struct page *page; + struct ext4_iloc iloc; + + if (pos + len > ext4_get_max_inline_size(inode)) + goto convert; + + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) + return ret; + + /* + * The possible write could happen in the inode, + * so try to reserve the space in inode first. + */ + handle = ext4_journal_start(inode, 1); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + handle = NULL; + goto out; + } + + ret = ext4_prepare_inline_data(handle, inode, pos + len); + if (ret && ret != -ENOSPC) + goto out; + + /* We don't have space in inline inode, so convert it to extent. */ + if (ret == -ENOSPC) { + ext4_journal_stop(handle); + brelse(iloc.bh); + goto convert; + } + + flags |= AOP_FLAG_NOFS; + + page = grab_cache_page_write_begin(mapping, 0, flags); + if (!page) { + ret = -ENOMEM; + goto out; + } + + *pagep = page; + down_read(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + ret = 0; + unlock_page(page); + page_cache_release(page); + goto out_up_read; + } + + if (!PageUptodate(page)) { + ret = ext4_read_inline_page(inode, page); + if (ret < 0) + goto out_up_read; + } + + ret = 1; + handle = NULL; +out_up_read: + up_read(&EXT4_I(inode)->xattr_sem); +out: + if (handle) + ext4_journal_stop(handle); + brelse(iloc.bh); + return ret; +convert: + return ext4_convert_inline_data_to_extent(mapping, + inode, flags); +} + +int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len, + unsigned copied, struct page *page) +{ + int ret; + void *kaddr; + struct ext4_iloc iloc; + + if (unlikely(copied < len)) { + if (!PageUptodate(page)) { + copied = 0; + goto out; + } + } + + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) { + ext4_std_error(inode->i_sb, ret); + copied = 0; + goto out; + } + + down_write(&EXT4_I(inode)->xattr_sem); + BUG_ON(!ext4_has_inline_data(inode)); + + kaddr = kmap_atomic(page); + ext4_write_inline_data(inode, &iloc, kaddr, pos, len); + kunmap_atomic(kaddr); + SetPageUptodate(page); + /* clear page dirty so that writepages wouldn't work for us. */ + ClearPageDirty(page); + + up_write(&EXT4_I(inode)->xattr_sem); + brelse(iloc.bh); +out: + return copied; +} + +struct buffer_head * +ext4_journalled_write_inline_data(struct inode *inode, + unsigned len, + struct page *page) +{ + int ret; + void *kaddr; + struct ext4_iloc iloc; + + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) { + ext4_std_error(inode->i_sb, ret); + return NULL; + } + + down_write(&EXT4_I(inode)->xattr_sem); + kaddr = kmap_atomic(page); + ext4_write_inline_data(inode, &iloc, kaddr, 0, len); + kunmap_atomic(kaddr); + up_write(&EXT4_I(inode)->xattr_sem); + + return iloc.bh; +} + +/* + * Try to make the page cache and handle ready for the inline data case. + * We can call this function in 2 cases: + * 1. The inode is created and the first write exceeds inline size. We can + * clear the inode state safely. + * 2. The inode has inline data, then we need to read the data, make it + * update and dirty so that ext4_da_writepages can handle it. We don't + * need to start the journal since the file's metatdata isn't changed now. + */ +static int ext4_da_convert_inline_data_to_extent(struct address_space *mapping, + struct inode *inode, + unsigned flags, + void **fsdata) +{ + int ret = 0, inline_size; + struct page *page; + + page = grab_cache_page_write_begin(mapping, 0, flags); + if (!page) + return -ENOMEM; + + down_read(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); + goto out; + } + + inline_size = ext4_get_inline_size(inode); + + if (!PageUptodate(page)) { + ret = ext4_read_inline_page(inode, page); + if (ret < 0) + goto out; + } + + ret = __block_write_begin(page, 0, inline_size, + ext4_da_get_block_prep); + if (ret) { + ext4_truncate_failed_write(inode); + goto out; + } + + SetPageDirty(page); + SetPageUptodate(page); + ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); + *fsdata = (void *)CONVERT_INLINE_DATA; + +out: + up_read(&EXT4_I(inode)->xattr_sem); + if (page) { + unlock_page(page); + page_cache_release(page); + } + return ret; +} + +/* + * Prepare the write for the inline data. + * If the the data can be written into the inode, we just read + * the page and make it uptodate, and start the journal. + * Otherwise read the page, makes it dirty so that it can be + * handle in writepages(the i_disksize update is left to the + * normal ext4_da_write_end). + */ +int ext4_da_write_inline_data_begin(struct address_space *mapping, + struct inode *inode, + loff_t pos, unsigned len, + unsigned flags, + struct page **pagep, + void **fsdata) +{ + int ret, inline_size; + handle_t *handle; + struct page *page; + struct ext4_iloc iloc; + + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) + return ret; + + handle = ext4_journal_start(inode, 1); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + handle = NULL; + goto out; + } + + inline_size = ext4_get_max_inline_size(inode); + + ret = -ENOSPC; + if (inline_size >= pos + len) { + ret = ext4_prepare_inline_data(handle, inode, pos + len); + if (ret && ret != -ENOSPC) + goto out; + } + + if (ret == -ENOSPC) { + ret = ext4_da_convert_inline_data_to_extent(mapping, + inode, + flags, + fsdata); + goto out; + } + + /* + * We cannot recurse into the filesystem as the transaction + * is already started. + */ + flags |= AOP_FLAG_NOFS; + + page = grab_cache_page_write_begin(mapping, 0, flags); + if (!page) { + ret = -ENOMEM; + goto out; + } + + down_read(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + ret = 0; + goto out_release_page; + } + + if (!PageUptodate(page)) { + ret = ext4_read_inline_page(inode, page); + if (ret < 0) + goto out_release_page; + } + + up_read(&EXT4_I(inode)->xattr_sem); + *pagep = page; + handle = NULL; + brelse(iloc.bh); + return 1; +out_release_page: + up_read(&EXT4_I(inode)->xattr_sem); + unlock_page(page); + page_cache_release(page); +out: + if (handle) + ext4_journal_stop(handle); + brelse(iloc.bh); + return ret; +} + +int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, + unsigned len, unsigned copied, + struct page *page) +{ + int i_size_changed = 0; + + copied = ext4_write_inline_data_end(inode, pos, len, copied, page); + + /* + * No need to use i_size_read() here, the i_size + * cannot change under us because we hold i_mutex. + * + * But it's important to update i_size while still holding page lock: + * page writeout could otherwise come in and zero beyond i_size. + */ + if (pos+copied > inode->i_size) { + i_size_write(inode, pos+copied); + i_size_changed = 1; + } + unlock_page(page); + page_cache_release(page); + + /* + * Don't mark the inode dirty under page lock. First, it unnecessarily + * makes the holding time of page lock longer. Second, it forces lock + * ordering of page lock and transaction start for journaling + * filesystems. + */ + if (i_size_changed) + mark_inode_dirty(inode); + + return copied; +} + +#ifdef INLINE_DIR_DEBUG +void ext4_show_inline_dir(struct inode *dir, struct buffer_head *bh, + void *inline_start, int inline_size) +{ + int offset; + unsigned short de_len; + struct ext4_dir_entry_2 *de = inline_start; + void *dlimit = inline_start + inline_size; + + trace_printk("inode %lu\n", dir->i_ino); + offset = 0; + while ((void *)de < dlimit) { + de_len = ext4_rec_len_from_disk(de->rec_len, inline_size); + trace_printk("de: off %u rlen %u name %*.s nlen %u ino %u\n", + offset, de_len, de->name_len, de->name, + de->name_len, le32_to_cpu(de->inode)); + if (ext4_check_dir_entry(dir, NULL, de, bh, + inline_start, inline_size, offset)) + BUG(); + + offset += de_len; + de = (struct ext4_dir_entry_2 *) ((char *) de + de_len); + } +} +#else +#define ext4_show_inline_dir(dir, bh, inline_start, inline_size) +#endif + +/* + * Add a new entry into a inline dir. + * It will return -ENOSPC if no space is available, and -EIO + * and -EEXIST if directory entry already exists. + */ +static int ext4_add_dirent_to_inline(handle_t *handle, + struct dentry *dentry, + struct inode *inode, + struct ext4_iloc *iloc, + void *inline_start, int inline_size) +{ + struct inode *dir = dentry->d_parent->d_inode; + const char *name = dentry->d_name.name; + int namelen = dentry->d_name.len; + unsigned short reclen; + int err; + struct ext4_dir_entry_2 *de; + + reclen = EXT4_DIR_REC_LEN(namelen); + err = ext4_find_dest_de(dir, inode, iloc->bh, + inline_start, inline_size, + name, namelen, &de); + if (err) + return err; + + err = ext4_journal_get_write_access(handle, iloc->bh); + if (err) + return err; + ext4_insert_dentry(inode, de, inline_size, name, namelen); + + ext4_show_inline_dir(dir, iloc->bh, inline_start, inline_size); + + /* + * XXX shouldn't update any times until successful + * completion of syscall, but too many callers depend + * on this. + * + * XXX similarly, too many callers depend on + * ext4_new_inode() setting the times, but error + * recovery deletes the inode, so the worst that can + * happen is that the times are slightly out of date + * and/or different from the directory change time. + */ + dir->i_mtime = dir->i_ctime = ext4_current_time(dir); + ext4_update_dx_flag(dir); + dir->i_version++; + ext4_mark_inode_dirty(handle, dir); + return 1; +} + +static void *ext4_get_inline_xattr_pos(struct inode *inode, + struct ext4_iloc *iloc) +{ + struct ext4_xattr_entry *entry; + struct ext4_xattr_ibody_header *header; + + BUG_ON(!EXT4_I(inode)->i_inline_off); + + header = IHDR(inode, ext4_raw_inode(iloc)); + entry = (struct ext4_xattr_entry *)((void *)ext4_raw_inode(iloc) + + EXT4_I(inode)->i_inline_off); + + return (void *)IFIRST(header) + le16_to_cpu(entry->e_value_offs); +} + +/* Set the final de to cover the whole block. */ +static void ext4_update_final_de(void *de_buf, int old_size, int new_size) +{ + struct ext4_dir_entry_2 *de, *prev_de; + void *limit; + int de_len; + + de = (struct ext4_dir_entry_2 *)de_buf; + if (old_size) { + limit = de_buf + old_size; + do { + prev_de = de; + de_len = ext4_rec_len_from_disk(de->rec_len, old_size); + de_buf += de_len; + de = (struct ext4_dir_entry_2 *)de_buf; + } while (de_buf < limit); + + prev_de->rec_len = ext4_rec_len_to_disk(de_len + new_size - + old_size, new_size); + } else { + /* this is just created, so create an empty entry. */ + de->inode = 0; + de->rec_len = ext4_rec_len_to_disk(new_size, new_size); + } +} + +static int ext4_update_inline_dir(handle_t *handle, struct inode *dir, + struct ext4_iloc *iloc) +{ + int ret; + int old_size = EXT4_I(dir)->i_inline_size - EXT4_MIN_INLINE_DATA_SIZE; + int new_size = get_max_inline_xattr_value_size(dir, iloc); + + if (new_size - old_size <= EXT4_DIR_REC_LEN(1)) + return -ENOSPC; + + ret = ext4_update_inline_data(handle, dir, + new_size + EXT4_MIN_INLINE_DATA_SIZE); + if (ret) + return ret; + + ext4_update_final_de(ext4_get_inline_xattr_pos(dir, iloc), old_size, + EXT4_I(dir)->i_inline_size - + EXT4_MIN_INLINE_DATA_SIZE); + dir->i_size = EXT4_I(dir)->i_disksize = EXT4_I(dir)->i_inline_size; + return 0; +} + +static void ext4_restore_inline_data(handle_t *handle, struct inode *inode, + struct ext4_iloc *iloc, + void *buf, int inline_size) +{ + ext4_create_inline_data(handle, inode, inline_size); + ext4_write_inline_data(inode, iloc, buf, 0, inline_size); + ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); +} + +static int ext4_finish_convert_inline_dir(handle_t *handle, + struct inode *inode, + struct buffer_head *dir_block, + void *buf, + int inline_size) +{ + int err, csum_size = 0, header_size = 0; + struct ext4_dir_entry_2 *de; + struct ext4_dir_entry_tail *t; + void *target = dir_block->b_data; + + /* + * First create "." and ".." and then copy the dir information + * back to the block. + */ + de = (struct ext4_dir_entry_2 *)target; + de = ext4_init_dot_dotdot(inode, de, + inode->i_sb->s_blocksize, csum_size, + le32_to_cpu(((struct ext4_dir_entry_2 *)buf)->inode), 1); + header_size = (void *)de - target; + + memcpy((void *)de, buf + EXT4_INLINE_DOTDOT_SIZE, + inline_size - EXT4_INLINE_DOTDOT_SIZE); + + if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, + EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) + csum_size = sizeof(struct ext4_dir_entry_tail); + + inode->i_size = inode->i_sb->s_blocksize; + i_size_write(inode, inode->i_sb->s_blocksize); + EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize; + ext4_update_final_de(dir_block->b_data, + inline_size - EXT4_INLINE_DOTDOT_SIZE + header_size, + inode->i_sb->s_blocksize - csum_size); + + if (csum_size) { + t = EXT4_DIRENT_TAIL(dir_block->b_data, + inode->i_sb->s_blocksize); + initialize_dirent_tail(t, inode->i_sb->s_blocksize); + } + set_buffer_uptodate(dir_block); + err = ext4_handle_dirty_dirent_node(handle, inode, dir_block); + if (err) + goto out; + set_buffer_verified(dir_block); +out: + return err; +} + +static int ext4_convert_inline_data_nolock(handle_t *handle, + struct inode *inode, + struct ext4_iloc *iloc) +{ + int error; + void *buf = NULL; + struct buffer_head *data_bh = NULL; + struct ext4_map_blocks map; + int inline_size; + + inline_size = ext4_get_inline_size(inode); + buf = kmalloc(inline_size, GFP_NOFS); + if (!buf) { + error = -ENOMEM; + goto out; + } + + error = ext4_read_inline_data(inode, buf, inline_size, iloc); + if (error < 0) + goto out; + + error = ext4_destroy_inline_data_nolock(handle, inode); + if (error) + goto out; + + map.m_lblk = 0; + map.m_len = 1; + map.m_flags = 0; + error = ext4_map_blocks(handle, inode, &map, EXT4_GET_BLOCKS_CREATE); + if (error < 0) + goto out_restore; + if (!(map.m_flags & EXT4_MAP_MAPPED)) { + error = -EIO; + goto out_restore; + } + + data_bh = sb_getblk(inode->i_sb, map.m_pblk); + if (!data_bh) { + error = -EIO; + goto out_restore; + } + + lock_buffer(data_bh); + error = ext4_journal_get_create_access(handle, data_bh); + if (error) { + unlock_buffer(data_bh); + error = -EIO; + goto out_restore; + } + memset(data_bh->b_data, 0, inode->i_sb->s_blocksize); + + if (!S_ISDIR(inode->i_mode)) { + memcpy(data_bh->b_data, buf, inline_size); + set_buffer_uptodate(data_bh); + error = ext4_handle_dirty_metadata(handle, + inode, data_bh); + } else { + error = ext4_finish_convert_inline_dir(handle, inode, data_bh, + buf, inline_size); + } + + unlock_buffer(data_bh); +out_restore: + if (error) + ext4_restore_inline_data(handle, inode, iloc, buf, inline_size); + +out: + brelse(data_bh); + kfree(buf); + return error; +} + +/* + * Try to add the new entry to the inline data. + * If succeeds, return 0. If not, extended the inline dir and copied data to + * the new created block. + */ +int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry, + struct inode *inode) +{ + int ret, inline_size; + void *inline_start; + struct ext4_iloc iloc; + struct inode *dir = dentry->d_parent->d_inode; + + ret = ext4_get_inode_loc(dir, &iloc); + if (ret) + return ret; + + down_write(&EXT4_I(dir)->xattr_sem); + if (!ext4_has_inline_data(dir)) + goto out; + + inline_start = (void *)ext4_raw_inode(&iloc)->i_block + + EXT4_INLINE_DOTDOT_SIZE; + inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE; + + ret = ext4_add_dirent_to_inline(handle, dentry, inode, &iloc, + inline_start, inline_size); + if (ret != -ENOSPC) + goto out; + + /* check whether it can be inserted to inline xattr space. */ + inline_size = EXT4_I(dir)->i_inline_size - + EXT4_MIN_INLINE_DATA_SIZE; + if (!inline_size) { + /* Try to use the xattr space.*/ + ret = ext4_update_inline_dir(handle, dir, &iloc); + if (ret && ret != -ENOSPC) + goto out; + + inline_size = EXT4_I(dir)->i_inline_size - + EXT4_MIN_INLINE_DATA_SIZE; + } + + if (inline_size) { + inline_start = ext4_get_inline_xattr_pos(dir, &iloc); + + ret = ext4_add_dirent_to_inline(handle, dentry, inode, &iloc, + inline_start, inline_size); + + if (ret != -ENOSPC) + goto out; + } + + /* + * The inline space is filled up, so create a new block for it. + * As the extent tree will be created, we have to save the inline + * dir first. + */ + ret = ext4_convert_inline_data_nolock(handle, dir, &iloc); + +out: + ext4_mark_inode_dirty(handle, dir); + up_write(&EXT4_I(dir)->xattr_sem); + brelse(iloc.bh); + return ret; +} + +int ext4_read_inline_dir(struct file *filp, + void *dirent, filldir_t filldir, + int *has_inline_data) +{ + int error = 0; + unsigned int offset, parent_ino; + int i, stored; + struct ext4_dir_entry_2 *de; + struct super_block *sb; + struct inode *inode = filp->f_path.dentry->d_inode; + int ret, inline_size = 0; + struct ext4_iloc iloc; + void *dir_buf = NULL; + + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) + return ret; + + down_read(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + up_read(&EXT4_I(inode)->xattr_sem); + *has_inline_data = 0; + goto out; + } + + inline_size = ext4_get_inline_size(inode); + dir_buf = kmalloc(inline_size, GFP_NOFS); + if (!dir_buf) { + ret = -ENOMEM; + up_read(&EXT4_I(inode)->xattr_sem); + goto out; + } + + ret = ext4_read_inline_data(inode, dir_buf, inline_size, &iloc); + up_read(&EXT4_I(inode)->xattr_sem); + if (ret < 0) + goto out; + + sb = inode->i_sb; + stored = 0; + parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode); + + while (!error && !stored && filp->f_pos < inode->i_size) { +revalidate: + /* + * If the version has changed since the last call to + * readdir(2), then we might be pointing to an invalid + * dirent right now. Scan from the start of the inline + * dir to make sure. + */ + if (filp->f_version != inode->i_version) { + for (i = 0; + i < inode->i_size && i < offset;) { + if (!i) { + /* skip "." and ".." if needed. */ + i += EXT4_INLINE_DOTDOT_SIZE; + continue; + } + de = (struct ext4_dir_entry_2 *) + (dir_buf + i); + /* It's too expensive to do a full + * dirent test each time round this + * loop, but we do have to test at + * least that it is non-zero. A + * failure will be detected in the + * dirent test below. */ + if (ext4_rec_len_from_disk(de->rec_len, + inline_size) < EXT4_DIR_REC_LEN(1)) + break; + i += ext4_rec_len_from_disk(de->rec_len, + inline_size); + } + offset = i; + filp->f_pos = offset; + filp->f_version = inode->i_version; + } + + while (!error && filp->f_pos < inode->i_size) { + if (filp->f_pos == 0) { + error = filldir(dirent, ".", 1, 0, inode->i_ino, + DT_DIR); + if (error) + break; + stored++; + + error = filldir(dirent, "..", 2, 0, parent_ino, + DT_DIR); + if (error) + break; + stored++; + + filp->f_pos = offset = EXT4_INLINE_DOTDOT_SIZE; + continue; + } + + de = (struct ext4_dir_entry_2 *)(dir_buf + offset); + if (ext4_check_dir_entry(inode, filp, de, + iloc.bh, dir_buf, + inline_size, offset)) { + ret = stored; + goto out; + } + offset += ext4_rec_len_from_disk(de->rec_len, + inline_size); + if (le32_to_cpu(de->inode)) { + /* We might block in the next section + * if the data destination is + * currently swapped out. So, use a + * version stamp to detect whether or + * not the directory has been modified + * during the copy operation. + */ + u64 version = filp->f_version; + + error = filldir(dirent, de->name, + de->name_len, + filp->f_pos, + le32_to_cpu(de->inode), + get_dtype(sb, de->file_type)); + if (error) + break; + if (version != filp->f_version) + goto revalidate; + stored++; + } + filp->f_pos += ext4_rec_len_from_disk(de->rec_len, + inline_size); + } + offset = 0; + } +out: + kfree(dir_buf); + brelse(iloc.bh); + return ret; +} + +struct buffer_head *ext4_get_first_inline_block(struct inode *inode, + struct ext4_dir_entry_2 **parent_de, + int *retval) +{ + struct ext4_iloc iloc; + + *retval = ext4_get_inode_loc(inode, &iloc); + if (*retval) + return NULL; + + *parent_de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block; + + return iloc.bh; +} + +/* + * Try to create the inline data for the new dir. + * If it succeeds, return 0, otherwise return the error. + * In case of ENOSPC, the caller should create the normal disk layout dir. + */ +int ext4_try_create_inline_dir(handle_t *handle, struct inode *parent, + struct inode *inode) +{ + int ret, inline_size = EXT4_MIN_INLINE_DATA_SIZE; + struct ext4_iloc iloc; + struct ext4_dir_entry_2 *de; + + ret = ext4_get_inode_loc(inode, &iloc); + if (ret) + return ret; + + ret = ext4_prepare_inline_data(handle, inode, inline_size); + if (ret) + goto out; + + /* + * For inline dir, we only save the inode information for the ".." + * and create a fake dentry to cover the left space. + */ + de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block; + de->inode = cpu_to_le32(parent->i_ino); + de = (struct ext4_dir_entry_2 *)((void *)de + EXT4_INLINE_DOTDOT_SIZE); + de->inode = 0; + de->rec_len = ext4_rec_len_to_disk( + inline_size - EXT4_INLINE_DOTDOT_SIZE, + inline_size); + set_nlink(inode, 2); + inode->i_size = EXT4_I(inode)->i_disksize = inline_size; +out: + brelse(iloc.bh); + return ret; +} + +struct buffer_head *ext4_find_inline_entry(struct inode *dir, + const struct qstr *d_name, + struct ext4_dir_entry_2 **res_dir, + int *has_inline_data) +{ + int ret; + struct ext4_iloc iloc; + void *inline_start; + int inline_size; + + if (ext4_get_inode_loc(dir, &iloc)) + return NULL; + + down_read(&EXT4_I(dir)->xattr_sem); + if (!ext4_has_inline_data(dir)) { + *has_inline_data = 0; + goto out; + } + + inline_start = (void *)ext4_raw_inode(&iloc)->i_block + + EXT4_INLINE_DOTDOT_SIZE; + inline_size = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DOTDOT_SIZE; + ret = search_dir(iloc.bh, inline_start, inline_size, + dir, d_name, 0, res_dir); + if (ret == 1) + goto out_find; + if (ret < 0) + goto out; + + if (ext4_get_inline_size(dir) == EXT4_MIN_INLINE_DATA_SIZE) + goto out; + + inline_start = ext4_get_inline_xattr_pos(dir, &iloc); + inline_size = ext4_get_inline_size(dir) - EXT4_MIN_INLINE_DATA_SIZE; + + ret = search_dir(iloc.bh, inline_start, inline_size, + dir, d_name, 0, res_dir); + if (ret == 1) + goto out_find; + +out: + brelse(iloc.bh); + iloc.bh = NULL; +out_find: + up_read(&EXT4_I(dir)->xattr_sem); + return iloc.bh; +} + +int ext4_delete_inline_entry(handle_t *handle, + struct inode *dir, + struct ext4_dir_entry_2 *de_del, + struct buffer_head *bh, + int *has_inline_data) +{ + int err, inline_size; + struct ext4_iloc iloc; + void *inline_start; + + err = ext4_get_inode_loc(dir, &iloc); + if (err) + return err; + + down_write(&EXT4_I(dir)->xattr_sem); + if (!ext4_has_inline_data(dir)) { + *has_inline_data = 0; + goto out; + } + + if ((void *)de_del - ((void *)ext4_raw_inode(&iloc)->i_block) < + EXT4_MIN_INLINE_DATA_SIZE) { + inline_start = (void *)ext4_raw_inode(&iloc)->i_block + + EXT4_INLINE_DOTDOT_SIZE; + inline_size = EXT4_MIN_INLINE_DATA_SIZE - + EXT4_INLINE_DOTDOT_SIZE; + } else { + inline_start = ext4_get_inline_xattr_pos(dir, &iloc); + inline_size = ext4_get_inline_size(dir) - + EXT4_MIN_INLINE_DATA_SIZE; + } + + err = ext4_journal_get_write_access(handle, bh); + if (err) + goto out; + + err = ext4_generic_delete_entry(handle, dir, de_del, bh, + inline_start, inline_size, 0); + if (err) + goto out; + + BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); + err = ext4_mark_inode_dirty(handle, dir); + if (unlikely(err)) + goto out; + + ext4_show_inline_dir(dir, iloc.bh, inline_start, inline_size); +out: + up_write(&EXT4_I(dir)->xattr_sem); + brelse(iloc.bh); + if (err != -ENOENT) + ext4_std_error(dir->i_sb, err); + return err; +} + +/* + * Get the inline dentry at offset. + */ +static inline struct ext4_dir_entry_2 * +ext4_get_inline_entry(struct inode *inode, + struct ext4_iloc *iloc, + unsigned int offset, + void **inline_start, + int *inline_size) +{ + void *inline_pos; + + BUG_ON(offset > ext4_get_inline_size(inode)); + + if (offset < EXT4_MIN_INLINE_DATA_SIZE) { + inline_pos = (void *)ext4_raw_inode(iloc)->i_block; + *inline_size = EXT4_MIN_INLINE_DATA_SIZE; + } else { + inline_pos = ext4_get_inline_xattr_pos(inode, iloc); + offset -= EXT4_MIN_INLINE_DATA_SIZE; + *inline_size = ext4_get_inline_size(inode) - + EXT4_MIN_INLINE_DATA_SIZE; + } + + if (inline_start) + *inline_start = inline_pos; + return (struct ext4_dir_entry_2 *)(inline_pos + offset); +} + +int empty_inline_dir(struct inode *dir, int *has_inline_data) +{ + int err, inline_size; + struct ext4_iloc iloc; + void *inline_pos; + unsigned int offset; + struct ext4_dir_entry_2 *de; + int ret = 1; + + err = ext4_get_inode_loc(dir, &iloc); + if (err) { + EXT4_ERROR_INODE(dir, "error %d getting inode %lu block", + err, dir->i_ino); + return 1; + } + + down_read(&EXT4_I(dir)->xattr_sem); + if (!ext4_has_inline_data(dir)) { + *has_inline_data = 0; + goto out; + } + + de = (struct ext4_dir_entry_2 *)ext4_raw_inode(&iloc)->i_block; + if (!le32_to_cpu(de->inode)) { + ext4_warning(dir->i_sb, + "bad inline directory (dir #%lu) - no `..'", + dir->i_ino); + ret = 1; + goto out; + } + + offset = EXT4_INLINE_DOTDOT_SIZE; + while (offset < dir->i_size) { + de = ext4_get_inline_entry(dir, &iloc, offset, + &inline_pos, &inline_size); + if (ext4_check_dir_entry(dir, NULL, de, + iloc.bh, inline_pos, + inline_size, offset)) { + ext4_warning(dir->i_sb, + "bad inline directory (dir #%lu) - " + "inode %u, rec_len %u, name_len %d" + "inline size %d\n", + dir->i_ino, le32_to_cpu(de->inode), + le16_to_cpu(de->rec_len), de->name_len, + inline_size); + ret = 1; + goto out; + } + if (le32_to_cpu(de->inode)) { + ret = 0; + goto out; + } + offset += ext4_rec_len_from_disk(de->rec_len, inline_size); + } + +out: + up_read(&EXT4_I(dir)->xattr_sem); + brelse(iloc.bh); + return ret; +} + +int ext4_destroy_inline_data(handle_t *handle, struct inode *inode) +{ + int ret; + + down_write(&EXT4_I(inode)->xattr_sem); + ret = ext4_destroy_inline_data_nolock(handle, inode); + up_write(&EXT4_I(inode)->xattr_sem); + + return ret; +} + +int ext4_inline_data_fiemap(struct inode *inode, + struct fiemap_extent_info *fieinfo, + int *has_inline) +{ + __u64 physical = 0; + __u64 length; + __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_LAST; + int error = 0; + struct ext4_iloc iloc; + + down_read(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + *has_inline = 0; + goto out; + } + + error = ext4_get_inode_loc(inode, &iloc); + if (error) + goto out; + + physical = iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits; + physical += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data; + physical += offsetof(struct ext4_inode, i_block); + length = i_size_read(inode); + + if (physical) + error = fiemap_fill_next_extent(fieinfo, 0, physical, + length, flags); + brelse(iloc.bh); +out: + up_read(&EXT4_I(inode)->xattr_sem); + return (error < 0 ? error : 0); +} + +/* + * Called during xattr set, and if we can sparse space 'needed', + * just create the extent tree evict the data to the outer block. + * + * We use jbd2 instead of page cache to move data to the 1st block + * so that the whole transaction can be committed as a whole and + * the data isn't lost because of the delayed page cache write. + */ +int ext4_try_to_evict_inline_data(handle_t *handle, + struct inode *inode, + int needed) +{ + int error; + struct ext4_xattr_entry *entry; + struct ext4_xattr_ibody_header *header; + struct ext4_inode *raw_inode; + struct ext4_iloc iloc; + + error = ext4_get_inode_loc(inode, &iloc); + if (error) + return error; + + raw_inode = ext4_raw_inode(&iloc); + header = IHDR(inode, raw_inode); + entry = (struct ext4_xattr_entry *)((void *)raw_inode + + EXT4_I(inode)->i_inline_off); + if (EXT4_XATTR_LEN(entry->e_name_len) + + EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size)) < needed) { + error = -ENOSPC; + goto out; + } + + error = ext4_convert_inline_data_nolock(handle, inode, &iloc); +out: + brelse(iloc.bh); + return error; +} + +void ext4_inline_data_truncate(struct inode *inode, int *has_inline) +{ + handle_t *handle; + int inline_size, value_len, needed_blocks; + size_t i_size; + void *value = NULL; + struct ext4_xattr_ibody_find is = { + .s = { .not_found = -ENODATA, }, + }; + struct ext4_xattr_info i = { + .name_index = EXT4_XATTR_INDEX_SYSTEM, + .name = EXT4_XATTR_SYSTEM_DATA, + }; + + + needed_blocks = ext4_writepage_trans_blocks(inode); + handle = ext4_journal_start(inode, needed_blocks); + if (IS_ERR(handle)) + return; + + down_write(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + *has_inline = 0; + ext4_journal_stop(handle); + return; + } + + if (ext4_orphan_add(handle, inode)) + goto out; + + if (ext4_get_inode_loc(inode, &is.iloc)) + goto out; + + down_write(&EXT4_I(inode)->i_data_sem); + i_size = inode->i_size; + inline_size = ext4_get_inline_size(inode); + EXT4_I(inode)->i_disksize = i_size; + + if (i_size < inline_size) { + /* Clear the content in the xattr space. */ + if (inline_size > EXT4_MIN_INLINE_DATA_SIZE) { + if (ext4_xattr_ibody_find(inode, &i, &is)) + goto out_error; + + BUG_ON(is.s.not_found); + + value_len = le32_to_cpu(is.s.here->e_value_size); + value = kmalloc(value_len, GFP_NOFS); + if (!value) + goto out_error; + + if (ext4_xattr_ibody_get(inode, i.name_index, i.name, + value, value_len)) + goto out_error; + + i.value = value; + i.value_len = i_size > EXT4_MIN_INLINE_DATA_SIZE ? + i_size - EXT4_MIN_INLINE_DATA_SIZE : 0; + if (ext4_xattr_ibody_inline_set(handle, inode, &i, &is)) + goto out_error; + } + + /* Clear the content within i_blocks. */ + if (i_size < EXT4_MIN_INLINE_DATA_SIZE) + memset(ext4_raw_inode(&is.iloc)->i_block + i_size, 0, + EXT4_MIN_INLINE_DATA_SIZE - i_size); + + EXT4_I(inode)->i_inline_size = i_size < + EXT4_MIN_INLINE_DATA_SIZE ? + EXT4_MIN_INLINE_DATA_SIZE : i_size; + } + +out_error: + up_write(&EXT4_I(inode)->i_data_sem); +out: + brelse(is.iloc.bh); + up_write(&EXT4_I(inode)->xattr_sem); + kfree(value); + if (inode->i_nlink) + ext4_orphan_del(handle, inode); + + inode->i_mtime = inode->i_ctime = ext4_current_time(inode); + ext4_mark_inode_dirty(handle, inode); + if (IS_SYNC(inode)) + ext4_handle_sync(handle); + + ext4_journal_stop(handle); + return; +} + +int ext4_convert_inline_data(struct inode *inode) +{ + int error, needed_blocks; + handle_t *handle; + struct ext4_iloc iloc; + + if (!ext4_has_inline_data(inode)) { + ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); + return 0; + } + + needed_blocks = ext4_writepage_trans_blocks(inode); + + iloc.bh = NULL; + error = ext4_get_inode_loc(inode, &iloc); + if (error) + return error; + + handle = ext4_journal_start(inode, needed_blocks); + if (IS_ERR(handle)) { + error = PTR_ERR(handle); + goto out_free; + } + + down_write(&EXT4_I(inode)->xattr_sem); + if (!ext4_has_inline_data(inode)) { + up_write(&EXT4_I(inode)->xattr_sem); + goto out; + } + + error = ext4_convert_inline_data_nolock(handle, inode, &iloc); + up_write(&EXT4_I(inode)->xattr_sem); +out: + ext4_journal_stop(handle); +out_free: + brelse(iloc.bh); + return error; +} diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index b3c243b9afa..cbfe13bf5b2 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -484,49 +484,6 @@ static pgoff_t ext4_num_dirty_pages(struct inode *inode, pgoff_t idx, } /* - * Sets the BH_Da_Mapped bit on the buffer heads corresponding to the given map. - */ -static void set_buffers_da_mapped(struct inode *inode, - struct ext4_map_blocks *map) -{ - struct address_space *mapping = inode->i_mapping; - struct pagevec pvec; - int i, nr_pages; - pgoff_t index, end; - - index = map->m_lblk >> (PAGE_CACHE_SHIFT - inode->i_blkbits); - end = (map->m_lblk + map->m_len - 1) >> - (PAGE_CACHE_SHIFT - inode->i_blkbits); - - pagevec_init(&pvec, 0); - while (index <= end) { - nr_pages = pagevec_lookup(&pvec, mapping, index, - min(end - index + 1, - (pgoff_t)PAGEVEC_SIZE)); - if (nr_pages == 0) - break; - for (i = 0; i < nr_pages; i++) { - struct page *page = pvec.pages[i]; - struct buffer_head *bh, *head; - - if (unlikely(page->mapping != mapping) || - !PageDirty(page)) - break; - - if (page_has_buffers(page)) { - bh = head = page_buffers(page); - do { - set_buffer_da_mapped(bh); - bh = bh->b_this_page; - } while (bh != head); - } - index++; - } - pagevec_release(&pvec); - } -} - -/* * The ext4_map_blocks() function tries to look up the requested blocks, * and returns if the blocks are already mapped. * @@ -574,7 +531,16 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, up_read((&EXT4_I(inode)->i_data_sem)); if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) { - int ret = check_block_validity(inode, map); + int ret; + if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) { + /* delayed alloc may be allocated by fallocate and + * coverted to initialized by directIO. + * we need to handle delayed extent here. + */ + down_write((&EXT4_I(inode)->i_data_sem)); + goto delayed_mapped; + } + ret = check_block_validity(inode, map); if (ret != 0) return ret; } @@ -652,12 +618,15 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) { ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED); - /* If we have successfully mapped the delayed allocated blocks, - * set the BH_Da_Mapped bit on them. Its important to do this - * under the protection of i_data_sem. - */ - if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) - set_buffers_da_mapped(inode, map); + if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) { + int ret; +delayed_mapped: + /* delayed allocation blocks has been allocated */ + ret = ext4_es_remove_extent(inode, map->m_lblk, + map->m_len); + if (ret < 0) + retval = ret; + } } up_write((&EXT4_I(inode)->i_data_sem)); @@ -680,10 +649,13 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock, int ret = 0, started = 0; int dio_credits; + if (ext4_has_inline_data(inode)) + return -ERANGE; + map.m_lblk = iblock; map.m_len = bh->b_size >> inode->i_blkbits; - if (flags && !handle) { + if (flags && !(flags & EXT4_GET_BLOCKS_NO_LOCK) && !handle) { /* Direct IO write... */ if (map.m_len > DIO_MAX_BLOCKS) map.m_len = DIO_MAX_BLOCKS; @@ -798,13 +770,13 @@ struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode, return NULL; } -static int walk_page_buffers(handle_t *handle, - struct buffer_head *head, - unsigned from, - unsigned to, - int *partial, - int (*fn)(handle_t *handle, - struct buffer_head *bh)) +int ext4_walk_page_buffers(handle_t *handle, + struct buffer_head *head, + unsigned from, + unsigned to, + int *partial, + int (*fn)(handle_t *handle, + struct buffer_head *bh)) { struct buffer_head *bh; unsigned block_start, block_end; @@ -854,8 +826,8 @@ static int walk_page_buffers(handle_t *handle, * is elevated. We'll still have enough credits for the tiny quotafile * write. */ -static int do_journal_get_write_access(handle_t *handle, - struct buffer_head *bh) +int do_journal_get_write_access(handle_t *handle, + struct buffer_head *bh) { int dirty = buffer_dirty(bh); int ret; @@ -878,7 +850,7 @@ static int do_journal_get_write_access(handle_t *handle, return ret; } -static int ext4_get_block_write(struct inode *inode, sector_t iblock, +static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); static int ext4_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, @@ -902,6 +874,17 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping, from = pos & (PAGE_CACHE_SIZE - 1); to = from + len; + if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) { + ret = ext4_try_to_write_inline_data(mapping, inode, pos, len, + flags, pagep); + if (ret < 0) + goto out; + if (ret == 1) { + ret = 0; + goto out; + } + } + retry: handle = ext4_journal_start(inode, needed_blocks); if (IS_ERR(handle)) { @@ -919,6 +902,7 @@ retry: ret = -ENOMEM; goto out; } + *pagep = page; if (ext4_should_dioread_nolock(inode)) @@ -927,8 +911,9 @@ retry: ret = __block_write_begin(page, pos, len, ext4_get_block); if (!ret && ext4_should_journal_data(inode)) { - ret = walk_page_buffers(handle, page_buffers(page), - from, to, NULL, do_journal_get_write_access); + ret = ext4_walk_page_buffers(handle, page_buffers(page), + from, to, NULL, + do_journal_get_write_access); } if (ret) { @@ -983,7 +968,12 @@ static int ext4_generic_write_end(struct file *file, struct inode *inode = mapping->host; handle_t *handle = ext4_journal_current_handle(); - copied = block_write_end(file, mapping, pos, len, copied, page, fsdata); + if (ext4_has_inline_data(inode)) + copied = ext4_write_inline_data_end(inode, pos, len, + copied, page); + else + copied = block_write_end(file, mapping, pos, + len, copied, page, fsdata); /* * No need to use i_size_read() here, the i_size @@ -1134,16 +1124,21 @@ static int ext4_journalled_write_end(struct file *file, BUG_ON(!ext4_handle_valid(handle)); - if (copied < len) { - if (!PageUptodate(page)) - copied = 0; - page_zero_new_buffers(page, from+copied, to); - } + if (ext4_has_inline_data(inode)) + copied = ext4_write_inline_data_end(inode, pos, len, + copied, page); + else { + if (copied < len) { + if (!PageUptodate(page)) + copied = 0; + page_zero_new_buffers(page, from+copied, to); + } - ret = walk_page_buffers(handle, page_buffers(page), from, - to, &partial, write_end_fn); - if (!partial) - SetPageUptodate(page); + ret = ext4_walk_page_buffers(handle, page_buffers(page), from, + to, &partial, write_end_fn); + if (!partial) + SetPageUptodate(page); + } new_i_size = pos + copied; if (new_i_size > inode->i_size) i_size_write(inode, pos+copied); @@ -1301,6 +1296,7 @@ static void ext4_da_page_release_reservation(struct page *page, struct inode *inode = page->mapping->host; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); int num_clusters; + ext4_fsblk_t lblk; head = page_buffers(page); bh = head; @@ -1310,20 +1306,23 @@ static void ext4_da_page_release_reservation(struct page *page, if ((offset <= curr_off) && (buffer_delay(bh))) { to_release++; clear_buffer_delay(bh); - clear_buffer_da_mapped(bh); } curr_off = next_off; } while ((bh = bh->b_this_page) != head); + if (to_release) { + lblk = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); + ext4_es_remove_extent(inode, lblk, to_release); + } + /* If we have released all the blocks belonging to a cluster, then we * need to release the reserved space for that cluster. */ num_clusters = EXT4_NUM_B2C(sbi, to_release); while (num_clusters > 0) { - ext4_fsblk_t lblk; lblk = (page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits)) + ((num_clusters - 1) << sbi->s_cluster_bits); if (sbi->s_cluster_ratio == 1 || - !ext4_find_delalloc_cluster(inode, lblk, 1)) + !ext4_find_delalloc_cluster(inode, lblk)) ext4_da_release_space(inode, 1); num_clusters--; @@ -1429,8 +1428,6 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd, clear_buffer_delay(bh); bh->b_blocknr = pblock; } - if (buffer_da_mapped(bh)) - clear_buffer_da_mapped(bh); if (buffer_unwritten(bh) || buffer_mapped(bh)) BUG_ON(bh->b_blocknr != pblock); @@ -1500,9 +1497,16 @@ static void ext4_da_block_invalidatepages(struct mpage_da_data *mpd) struct pagevec pvec; struct inode *inode = mpd->inode; struct address_space *mapping = inode->i_mapping; + ext4_lblk_t start, last; index = mpd->first_page; end = mpd->next_page - 1; + + start = index << (PAGE_CACHE_SHIFT - inode->i_blkbits); + last = end << (PAGE_CACHE_SHIFT - inode->i_blkbits); + ext4_es_remove_extent(inode, start, last - start + 1); + + pagevec_init(&pvec, 0); while (index <= end) { nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE); if (nr_pages == 0) @@ -1656,15 +1660,6 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd) for (i = 0; i < map.m_len; i++) unmap_underlying_metadata(bdev, map.m_pblk + i); - - if (ext4_should_order_data(mpd->inode)) { - err = ext4_jbd2_file_inode(handle, mpd->inode); - if (err) { - /* Only if the journal is aborted */ - mpd->retval = err; - goto submit_io; - } - } } /* @@ -1795,7 +1790,19 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, * file system block. */ down_read((&EXT4_I(inode)->i_data_sem)); - if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) + if (ext4_has_inline_data(inode)) { + /* + * We will soon create blocks for this page, and let + * us pretend as if the blocks aren't allocated yet. + * In case of clusters, we have to handle the work + * of mapping from cluster so that the reserved space + * is calculated properly. + */ + if ((EXT4_SB(inode->i_sb)->s_cluster_ratio > 1) && + ext4_find_delalloc_cluster(inode, map->m_lblk)) + map->m_flags |= EXT4_MAP_FROM_CLUSTER; + retval = 0; + } else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) retval = ext4_ext_map_blocks(NULL, inode, map, 0); else retval = ext4_ind_map_blocks(NULL, inode, map, 0); @@ -1814,6 +1821,10 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, goto out_unlock; } + retval = ext4_es_insert_extent(inode, map->m_lblk, map->m_len); + if (retval) + goto out_unlock; + /* Clear EXT4_MAP_FROM_CLUSTER flag since its purpose is served * and it should not appear on the bh->b_state. */ @@ -1842,8 +1853,8 @@ out_unlock: * We also have b_blocknr = physicalblock mapping unwritten extent and b_bdev * initialized properly. */ -static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, - struct buffer_head *bh, int create) +int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, + struct buffer_head *bh, int create) { struct ext4_map_blocks map; int ret = 0; @@ -1917,15 +1928,29 @@ static int __ext4_journalled_writepage(struct page *page, { struct address_space *mapping = page->mapping; struct inode *inode = mapping->host; - struct buffer_head *page_bufs; + struct buffer_head *page_bufs = NULL; handle_t *handle = NULL; - int ret = 0; - int err; + int ret = 0, err = 0; + int inline_data = ext4_has_inline_data(inode); + struct buffer_head *inode_bh = NULL; ClearPageChecked(page); - page_bufs = page_buffers(page); - BUG_ON(!page_bufs); - walk_page_buffers(handle, page_bufs, 0, len, NULL, bget_one); + + if (inline_data) { + BUG_ON(page->index != 0); + BUG_ON(len > ext4_get_max_inline_size(inode)); + inode_bh = ext4_journalled_write_inline_data(inode, len, page); + if (inode_bh == NULL) + goto out; + } else { + page_bufs = page_buffers(page); + if (!page_bufs) { + BUG(); + goto out; + } + ext4_walk_page_buffers(handle, page_bufs, 0, len, + NULL, bget_one); + } /* As soon as we unlock the page, it can go away, but we have * references to buffers so we are safe */ unlock_page(page); @@ -1938,11 +1963,18 @@ static int __ext4_journalled_writepage(struct page *page, BUG_ON(!ext4_handle_valid(handle)); - ret = walk_page_buffers(handle, page_bufs, 0, len, NULL, - do_journal_get_write_access); + if (inline_data) { + ret = ext4_journal_get_write_access(handle, inode_bh); - err = walk_page_buffers(handle, page_bufs, 0, len, NULL, - write_end_fn); + err = ext4_handle_dirty_metadata(handle, inode, inode_bh); + + } else { + ret = ext4_walk_page_buffers(handle, page_bufs, 0, len, NULL, + do_journal_get_write_access); + + err = ext4_walk_page_buffers(handle, page_bufs, 0, len, NULL, + write_end_fn); + } if (ret == 0) ret = err; EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid; @@ -1950,9 +1982,12 @@ static int __ext4_journalled_writepage(struct page *page, if (!ret) ret = err; - walk_page_buffers(handle, page_bufs, 0, len, NULL, bput_one); + if (!ext4_has_inline_data(inode)) + ext4_walk_page_buffers(handle, page_bufs, 0, len, + NULL, bput_one); ext4_set_inode_state(inode, EXT4_STATE_JDATA); out: + brelse(inode_bh); return ret; } @@ -2029,8 +2064,8 @@ static int ext4_writepage(struct page *page, commit_write = 1; } page_bufs = page_buffers(page); - if (walk_page_buffers(NULL, page_bufs, 0, len, NULL, - ext4_bh_delay_or_unwritten)) { + if (ext4_walk_page_buffers(NULL, page_bufs, 0, len, NULL, + ext4_bh_delay_or_unwritten)) { /* * We don't want to do block allocation, so redirty * the page and return. We may reach here when we do @@ -2096,7 +2131,8 @@ static int ext4_da_writepages_trans_blocks(struct inode *inode) * mpage_da_map_and_submit to map a single contiguous memory region * and then write them. */ -static int write_cache_pages_da(struct address_space *mapping, +static int write_cache_pages_da(handle_t *handle, + struct address_space *mapping, struct writeback_control *wbc, struct mpage_da_data *mpd, pgoff_t *done_index) @@ -2175,6 +2211,17 @@ static int write_cache_pages_da(struct address_space *mapping, wait_on_page_writeback(page); BUG_ON(PageWriteback(page)); + /* + * If we have inline data and arrive here, it means that + * we will soon create the block for the 1st page, so + * we'd better clear the inline data here. + */ + if (ext4_has_inline_data(inode)) { + BUG_ON(ext4_test_inode_state(inode, + EXT4_STATE_MAY_INLINE_DATA)); + ext4_destroy_inline_data(handle, inode); + } + if (mpd->next_page != page->index) mpd->first_page = page->index; mpd->next_page = page->index + 1; @@ -2381,7 +2428,8 @@ retry: * contiguous region of logical blocks that need * blocks to be allocated by ext4 and submit them. */ - ret = write_cache_pages_da(mapping, wbc, &mpd, &done_index); + ret = write_cache_pages_da(handle, mapping, + wbc, &mpd, &done_index); /* * If we have a contiguous extent of pages and we * haven't done the I/O yet, map the blocks and submit @@ -2445,7 +2493,6 @@ out_writepages: return ret; } -#define FALL_BACK_TO_NONDELALLOC 1 static int ext4_nonda_switch(struct super_block *sb) { s64 free_blocks, dirty_blocks; @@ -2502,6 +2549,19 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping, } *fsdata = (void *)0; trace_ext4_da_write_begin(inode, pos, len, flags); + + if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) { + ret = ext4_da_write_inline_data_begin(mapping, inode, + pos, len, flags, + pagep, fsdata); + if (ret < 0) + goto out; + if (ret == 1) { + ret = 0; + goto out; + } + } + retry: /* * With delayed allocation, we don't log the i_disksize update @@ -2603,22 +2663,13 @@ static int ext4_da_write_end(struct file *file, * changes. So let's piggyback the i_disksize mark_inode_dirty * into that. */ - new_i_size = pos + copied; if (copied && new_i_size > EXT4_I(inode)->i_disksize) { - if (ext4_da_should_update_i_disksize(page, end)) { + if (ext4_has_inline_data(inode) || + ext4_da_should_update_i_disksize(page, end)) { down_write(&EXT4_I(inode)->i_data_sem); - if (new_i_size > EXT4_I(inode)->i_disksize) { - /* - * Updating i_disksize when extending file - * without needing block allocation - */ - if (ext4_should_order_data(inode)) - ret = ext4_jbd2_file_inode(handle, - inode); - + if (new_i_size > EXT4_I(inode)->i_disksize) EXT4_I(inode)->i_disksize = new_i_size; - } up_write(&EXT4_I(inode)->i_data_sem); /* We need to mark inode dirty even if * new_i_size is less that inode->i_size @@ -2627,8 +2678,16 @@ static int ext4_da_write_end(struct file *file, ext4_mark_inode_dirty(handle, inode); } } - ret2 = generic_write_end(file, mapping, pos, len, copied, + + if (write_mode != CONVERT_INLINE_DATA && + ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA) && + ext4_has_inline_data(inode)) + ret2 = ext4_da_write_inline_data_end(inode, pos, len, copied, + page); + else + ret2 = generic_write_end(file, mapping, pos, len, copied, page, fsdata); + copied = ret2; if (ret2 < 0) ret = ret2; @@ -2721,6 +2780,12 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block) journal_t *journal; int err; + /* + * We can get here for an inline file via the FIBMAP ioctl + */ + if (ext4_has_inline_data(inode)) + return 0; + if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) && test_opt(inode->i_sb, DELALLOC)) { /* @@ -2766,14 +2831,30 @@ static sector_t ext4_bmap(struct address_space *mapping, sector_t block) static int ext4_readpage(struct file *file, struct page *page) { + int ret = -EAGAIN; + struct inode *inode = page->mapping->host; + trace_ext4_readpage(page); - return mpage_readpage(page, ext4_get_block); + + if (ext4_has_inline_data(inode)) + ret = ext4_readpage_inline(inode, page); + + if (ret == -EAGAIN) + return mpage_readpage(page, ext4_get_block); + + return ret; } static int ext4_readpages(struct file *file, struct address_space *mapping, struct list_head *pages, unsigned nr_pages) { + struct inode *inode = mapping->host; + + /* If the file has inline data, no need to do readpages. */ + if (ext4_has_inline_data(inode)) + return 0; + return mpage_readpages(mapping, pages, nr_pages, ext4_get_block); } @@ -2799,8 +2880,6 @@ static void ext4_invalidatepage_free_endio(struct page *page, unsigned long offs static void ext4_invalidatepage(struct page *page, unsigned long offset) { - journal_t *journal = EXT4_JOURNAL(page->mapping->host); - trace_ext4_invalidatepage(page, offset); /* @@ -2808,16 +2887,34 @@ static void ext4_invalidatepage(struct page *page, unsigned long offset) */ if (ext4_should_dioread_nolock(page->mapping->host)) ext4_invalidatepage_free_endio(page, offset); + + /* No journalling happens on data buffers when this function is used */ + WARN_ON(page_has_buffers(page) && buffer_jbd(page_buffers(page))); + + block_invalidatepage(page, offset); +} + +static int __ext4_journalled_invalidatepage(struct page *page, + unsigned long offset) +{ + journal_t *journal = EXT4_JOURNAL(page->mapping->host); + + trace_ext4_journalled_invalidatepage(page, offset); + /* * If it's a full truncate we just forget about the pending dirtying */ if (offset == 0) ClearPageChecked(page); - if (journal) - jbd2_journal_invalidatepage(journal, page, offset); - else - block_invalidatepage(page, offset); + return jbd2_journal_invalidatepage(journal, page, offset); +} + +/* Wrapper for aops... */ +static void ext4_journalled_invalidatepage(struct page *page, + unsigned long offset) +{ + WARN_ON(__ext4_journalled_invalidatepage(page, offset) < 0); } static int ext4_releasepage(struct page *page, gfp_t wait) @@ -2840,7 +2937,7 @@ static int ext4_releasepage(struct page *page, gfp_t wait) * We allocate an uinitialized extent if blocks haven't been allocated. * The extent will be converted to initialized after the IO is complete. */ -static int ext4_get_block_write(struct inode *inode, sector_t iblock, +int ext4_get_block_write(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { ext4_debug("ext4_get_block_write: inode %lu, create flag %d\n", @@ -2850,29 +2947,12 @@ static int ext4_get_block_write(struct inode *inode, sector_t iblock, } static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int flags) + struct buffer_head *bh_result, int create) { - handle_t *handle = ext4_journal_current_handle(); - struct ext4_map_blocks map; - int ret = 0; - - ext4_debug("ext4_get_block_write_nolock: inode %lu, flag %d\n", - inode->i_ino, flags); - - flags = EXT4_GET_BLOCKS_NO_LOCK; - - map.m_lblk = iblock; - map.m_len = bh_result->b_size >> inode->i_blkbits; - - ret = ext4_map_blocks(handle, inode, &map, flags); - if (ret > 0) { - map_bh(bh_result, inode->i_sb, map.m_pblk); - bh_result->b_state = (bh_result->b_state & ~EXT4_MAP_FLAGS) | - map.m_flags; - bh_result->b_size = inode->i_sb->s_blocksize * map.m_len; - ret = 0; - } - return ret; + ext4_debug("ext4_get_block_write_nolock: inode %lu, create flag %d\n", + inode->i_ino, create); + return _ext4_get_block(inode, iblock, bh_result, + EXT4_GET_BLOCKS_NO_LOCK); } static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, @@ -2978,10 +3058,10 @@ retry: * fall back to buffered IO. * * For holes, we fallocate those blocks, mark them as uninitialized - * If those blocks were preallocated, we mark sure they are splited, but + * If those blocks were preallocated, we mark sure they are split, but * still keep the range to write as uninitialized. * - * The unwrritten extents will be converted to written when DIO is completed. + * The unwritten extents will be converted to written when DIO is completed. * For async direct IO, since the IO may still pending when return, we * set up an end_io call back function, which will do the conversion * when async direct IO completed. @@ -2999,125 +3079,120 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb, struct inode *inode = file->f_mapping->host; ssize_t ret; size_t count = iov_length(iov, nr_segs); - + int overwrite = 0; + get_block_t *get_block_func = NULL; + int dio_flags = 0; loff_t final_size = offset + count; - if (rw == WRITE && final_size <= inode->i_size) { - int overwrite = 0; - BUG_ON(iocb->private == NULL); + /* Use the old path for reads and writes beyond i_size. */ + if (rw != WRITE || final_size > inode->i_size) + return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs); - /* If we do a overwrite dio, i_mutex locking can be released */ - overwrite = *((int *)iocb->private); + BUG_ON(iocb->private == NULL); - if (overwrite) { - atomic_inc(&inode->i_dio_count); - down_read(&EXT4_I(inode)->i_data_sem); - mutex_unlock(&inode->i_mutex); - } + /* If we do a overwrite dio, i_mutex locking can be released */ + overwrite = *((int *)iocb->private); - /* - * We could direct write to holes and fallocate. - * - * Allocated blocks to fill the hole are marked as uninitialized - * to prevent parallel buffered read to expose the stale data - * before DIO complete the data IO. - * - * As to previously fallocated extents, ext4 get_block - * will just simply mark the buffer mapped but still - * keep the extents uninitialized. - * - * for non AIO case, we will convert those unwritten extents - * to written after return back from blockdev_direct_IO. - * - * for async DIO, the conversion needs to be defered when - * the IO is completed. The ext4 end_io callback function - * will be called to take care of the conversion work. - * Here for async case, we allocate an io_end structure to - * hook to the iocb. - */ - iocb->private = NULL; - ext4_inode_aio_set(inode, NULL); - if (!is_sync_kiocb(iocb)) { - ext4_io_end_t *io_end = - ext4_init_io_end(inode, GFP_NOFS); - if (!io_end) { - ret = -ENOMEM; - goto retake_lock; - } - io_end->flag |= EXT4_IO_END_DIRECT; - iocb->private = io_end; - /* - * we save the io structure for current async - * direct IO, so that later ext4_map_blocks() - * could flag the io structure whether there - * is a unwritten extents needs to be converted - * when IO is completed. - */ - ext4_inode_aio_set(inode, io_end); - } + if (overwrite) { + atomic_inc(&inode->i_dio_count); + down_read(&EXT4_I(inode)->i_data_sem); + mutex_unlock(&inode->i_mutex); + } - if (overwrite) - ret = __blockdev_direct_IO(rw, iocb, inode, - inode->i_sb->s_bdev, iov, - offset, nr_segs, - ext4_get_block_write_nolock, - ext4_end_io_dio, - NULL, - 0); - else - ret = __blockdev_direct_IO(rw, iocb, inode, - inode->i_sb->s_bdev, iov, - offset, nr_segs, - ext4_get_block_write, - ext4_end_io_dio, - NULL, - DIO_LOCKING); - if (iocb->private) - ext4_inode_aio_set(inode, NULL); + /* + * We could direct write to holes and fallocate. + * + * Allocated blocks to fill the hole are marked as + * uninitialized to prevent parallel buffered read to expose + * the stale data before DIO complete the data IO. + * + * As to previously fallocated extents, ext4 get_block will + * just simply mark the buffer mapped but still keep the + * extents uninitialized. + * + * For non AIO case, we will convert those unwritten extents + * to written after return back from blockdev_direct_IO. + * + * For async DIO, the conversion needs to be deferred when the + * IO is completed. The ext4 end_io callback function will be + * called to take care of the conversion work. Here for async + * case, we allocate an io_end structure to hook to the iocb. + */ + iocb->private = NULL; + ext4_inode_aio_set(inode, NULL); + if (!is_sync_kiocb(iocb)) { + ext4_io_end_t *io_end = ext4_init_io_end(inode, GFP_NOFS); + if (!io_end) { + ret = -ENOMEM; + goto retake_lock; + } + io_end->flag |= EXT4_IO_END_DIRECT; + iocb->private = io_end; /* - * The io_end structure takes a reference to the inode, - * that structure needs to be destroyed and the - * reference to the inode need to be dropped, when IO is - * complete, even with 0 byte write, or failed. - * - * In the successful AIO DIO case, the io_end structure will be - * desctroyed and the reference to the inode will be dropped - * after the end_io call back function is called. - * - * In the case there is 0 byte write, or error case, since - * VFS direct IO won't invoke the end_io call back function, - * we need to free the end_io structure here. + * we save the io structure for current async direct + * IO, so that later ext4_map_blocks() could flag the + * io structure whether there is a unwritten extents + * needs to be converted when IO is completed. */ - if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) { - ext4_free_io_end(iocb->private); - iocb->private = NULL; - } else if (ret > 0 && !overwrite && ext4_test_inode_state(inode, - EXT4_STATE_DIO_UNWRITTEN)) { - int err; - /* - * for non AIO case, since the IO is already - * completed, we could do the conversion right here - */ - err = ext4_convert_unwritten_extents(inode, - offset, ret); - if (err < 0) - ret = err; - ext4_clear_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); - } + ext4_inode_aio_set(inode, io_end); + } - retake_lock: - /* take i_mutex locking again if we do a ovewrite dio */ - if (overwrite) { - inode_dio_done(inode); - up_read(&EXT4_I(inode)->i_data_sem); - mutex_lock(&inode->i_mutex); - } + if (overwrite) { + get_block_func = ext4_get_block_write_nolock; + } else { + get_block_func = ext4_get_block_write; + dio_flags = DIO_LOCKING; + } + ret = __blockdev_direct_IO(rw, iocb, inode, + inode->i_sb->s_bdev, iov, + offset, nr_segs, + get_block_func, + ext4_end_io_dio, + NULL, + dio_flags); + + if (iocb->private) + ext4_inode_aio_set(inode, NULL); + /* + * The io_end structure takes a reference to the inode, that + * structure needs to be destroyed and the reference to the + * inode need to be dropped, when IO is complete, even with 0 + * byte write, or failed. + * + * In the successful AIO DIO case, the io_end structure will + * be destroyed and the reference to the inode will be dropped + * after the end_io call back function is called. + * + * In the case there is 0 byte write, or error case, since VFS + * direct IO won't invoke the end_io call back function, we + * need to free the end_io structure here. + */ + if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) { + ext4_free_io_end(iocb->private); + iocb->private = NULL; + } else if (ret > 0 && !overwrite && ext4_test_inode_state(inode, + EXT4_STATE_DIO_UNWRITTEN)) { + int err; + /* + * for non AIO case, since the IO is already + * completed, we could do the conversion right here + */ + err = ext4_convert_unwritten_extents(inode, + offset, ret); + if (err < 0) + ret = err; + ext4_clear_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); + } - return ret; +retake_lock: + /* take i_mutex locking again if we do a ovewrite dio */ + if (overwrite) { + inode_dio_done(inode); + up_read(&EXT4_I(inode)->i_data_sem); + mutex_lock(&inode->i_mutex); } - /* for write the the end of file case, we fall back to old way */ - return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs); + return ret; } static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb, @@ -3134,6 +3209,10 @@ static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb, if (ext4_should_journal_data(inode)) return 0; + /* Let buffer I/O handle the inline data case. */ + if (ext4_has_inline_data(inode)) + return 0; + trace_ext4_direct_IO_enter(inode, offset, iov_length(iov, nr_segs), rw); if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) ret = ext4_ext_direct_IO(rw, iocb, iov, offset, nr_segs); @@ -3201,7 +3280,7 @@ static const struct address_space_operations ext4_journalled_aops = { .write_end = ext4_journalled_write_end, .set_page_dirty = ext4_journalled_set_page_dirty, .bmap = ext4_bmap, - .invalidatepage = ext4_invalidatepage, + .invalidatepage = ext4_journalled_invalidatepage, .releasepage = ext4_releasepage, .direct_IO = ext4_direct_IO, .is_partially_uptodate = block_is_partially_uptodate, @@ -3531,6 +3610,14 @@ void ext4_truncate(struct inode *inode) if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC)) ext4_set_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE); + if (ext4_has_inline_data(inode)) { + int has_inline = 1; + + ext4_inline_data_truncate(inode, &has_inline); + if (has_inline) + return; + } + if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) ext4_ext_truncate(inode); else @@ -3756,6 +3843,19 @@ static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode, } } +static inline void ext4_iget_extra_inode(struct inode *inode, + struct ext4_inode *raw_inode, + struct ext4_inode_info *ei) +{ + __le32 *magic = (void *)raw_inode + + EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize; + if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC)) { + ext4_set_inode_state(inode, EXT4_STATE_XATTR); + ext4_find_inline_data_nolock(inode); + } else + EXT4_I(inode)->i_inline_off = 0; +} + struct inode *ext4_iget(struct super_block *sb, unsigned long ino) { struct ext4_iloc iloc; @@ -3826,6 +3926,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ + ei->i_inline_off = 0; ei->i_dir_start_lookup = 0; ei->i_dtime = le32_to_cpu(raw_inode->i_dtime); /* We now have enough fields to check if the inode was active or not. @@ -3898,11 +3999,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) ei->i_extra_isize = sizeof(struct ext4_inode) - EXT4_GOOD_OLD_INODE_SIZE; } else { - __le32 *magic = (void *)raw_inode + - EXT4_GOOD_OLD_INODE_SIZE + - ei->i_extra_isize; - if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC)) - ext4_set_inode_state(inode, EXT4_STATE_XATTR); + ext4_iget_extra_inode(inode, raw_inode, ei); } } @@ -3925,17 +4022,19 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) ei->i_file_acl); ret = -EIO; goto bad_inode; - } else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { - if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || - (S_ISLNK(inode->i_mode) && - !ext4_inode_is_fast_symlink(inode))) - /* Validate extent which is part of inode */ - ret = ext4_ext_check_inode(inode); - } else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || - (S_ISLNK(inode->i_mode) && - !ext4_inode_is_fast_symlink(inode))) { - /* Validate block references which are part of inode */ - ret = ext4_ind_check_inode(inode); + } else if (!ext4_has_inline_data(inode)) { + if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { + if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || + (S_ISLNK(inode->i_mode) && + !ext4_inode_is_fast_symlink(inode)))) + /* Validate extent which is part of inode */ + ret = ext4_ext_check_inode(inode); + } else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || + (S_ISLNK(inode->i_mode) && + !ext4_inode_is_fast_symlink(inode))) { + /* Validate block references which are part of inode */ + ret = ext4_ind_check_inode(inode); + } } if (ret) goto bad_inode; @@ -4122,9 +4221,10 @@ static int ext4_do_update_inode(handle_t *handle, cpu_to_le32(new_encode_dev(inode->i_rdev)); raw_inode->i_block[2] = 0; } - } else + } else if (!ext4_has_inline_data(inode)) { for (block = 0; block < EXT4_N_BLOCKS; block++) raw_inode->i_block[block] = ei->i_data[block]; + } raw_inode->i_disk_version = cpu_to_le32(inode->i_version); if (ei->i_extra_isize) { @@ -4221,6 +4321,47 @@ int ext4_write_inode(struct inode *inode, struct writeback_control *wbc) } /* + * In data=journal mode ext4_journalled_invalidatepage() may fail to invalidate + * buffers that are attached to a page stradding i_size and are undergoing + * commit. In that case we have to wait for commit to finish and try again. + */ +static void ext4_wait_for_tail_page_commit(struct inode *inode) +{ + struct page *page; + unsigned offset; + journal_t *journal = EXT4_SB(inode->i_sb)->s_journal; + tid_t commit_tid = 0; + int ret; + + offset = inode->i_size & (PAGE_CACHE_SIZE - 1); + /* + * All buffers in the last page remain valid? Then there's nothing to + * do. We do the check mainly to optimize the common PAGE_CACHE_SIZE == + * blocksize case + */ + if (offset > PAGE_CACHE_SIZE - (1 << inode->i_blkbits)) + return; + while (1) { + page = find_lock_page(inode->i_mapping, + inode->i_size >> PAGE_CACHE_SHIFT); + if (!page) + return; + ret = __ext4_journalled_invalidatepage(page, offset); + unlock_page(page); + page_cache_release(page); + if (ret != -EBUSY) + return; + commit_tid = 0; + read_lock(&journal->j_state_lock); + if (journal->j_committing_transaction) + commit_tid = journal->j_committing_transaction->t_tid; + read_unlock(&journal->j_state_lock); + if (commit_tid) + jbd2_log_wait_commit(journal, commit_tid); + } +} + +/* * ext4_setattr() * * Called from notify_change. @@ -4333,16 +4474,28 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) } if (attr->ia_valid & ATTR_SIZE) { - if (attr->ia_size != i_size_read(inode)) { - truncate_setsize(inode, attr->ia_size); - /* Inode size will be reduced, wait for dio in flight. - * Temporarily disable dioread_nolock to prevent - * livelock. */ + if (attr->ia_size != inode->i_size) { + loff_t oldsize = inode->i_size; + + i_size_write(inode, attr->ia_size); + /* + * Blocks are going to be removed from the inode. Wait + * for dio in flight. Temporarily disable + * dioread_nolock to prevent livelock. + */ if (orphan) { - ext4_inode_block_unlocked_dio(inode); - inode_dio_wait(inode); - ext4_inode_resume_unlocked_dio(inode); + if (!ext4_should_journal_data(inode)) { + ext4_inode_block_unlocked_dio(inode); + inode_dio_wait(inode); + ext4_inode_resume_unlocked_dio(inode); + } else + ext4_wait_for_tail_page_commit(inode); } + /* + * Truncate pagecache after we've waited for commit + * in data=journal mode to make pages freeable. + */ + truncate_pagecache(inode, oldsize, inode->i_size); } ext4_truncate(inode); } @@ -4811,8 +4964,9 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) * journal_start/journal_stop which can block and take a long time */ if (page_has_buffers(page)) { - if (!walk_page_buffers(NULL, page_buffers(page), 0, len, NULL, - ext4_bh_unmapped)) { + if (!ext4_walk_page_buffers(NULL, page_buffers(page), + 0, len, NULL, + ext4_bh_unmapped)) { /* Wait so that we don't change page under IO */ wait_on_page_writeback(page); ret = VM_FAULT_LOCKED; @@ -4833,7 +4987,7 @@ retry_alloc: } ret = __block_page_mkwrite(vma, vmf, get_block); if (!ret && ext4_should_journal_data(inode)) { - if (walk_page_buffers(handle, page_buffers(page), 0, + if (ext4_walk_page_buffers(handle, page_buffers(page), 0, PAGE_CACHE_SIZE, NULL, do_journal_get_write_access)) { unlock_page(page); ret = VM_FAULT_SIGBUS; diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 526e5535860..1bf6fe785c4 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -1373,7 +1373,7 @@ static int mb_find_extent(struct ext4_buddy *e4b, int block, ex->fe_start += next; while (needed > ex->fe_len && - (buddy = mb_find_buddy(e4b, order, &max))) { + mb_find_buddy(e4b, order, &max)) { if (block + 1 >= max) break; @@ -2607,9 +2607,17 @@ static void ext4_free_data_callback(struct super_block *sb, mb_debug(1, "gonna free %u blocks in group %u (0x%p):", entry->efd_count, entry->efd_group, entry); - if (test_opt(sb, DISCARD)) - ext4_issue_discard(sb, entry->efd_group, - entry->efd_start_cluster, entry->efd_count); + if (test_opt(sb, DISCARD)) { + err = ext4_issue_discard(sb, entry->efd_group, + entry->efd_start_cluster, + entry->efd_count); + if (err && err != -EOPNOTSUPP) + ext4_msg(sb, KERN_WARNING, "discard request in" + " group:%d block:%d count:%d failed" + " with %d", entry->efd_group, + entry->efd_start_cluster, + entry->efd_count, err); + } err = ext4_mb_load_buddy(sb, entry->efd_group, &e4b); /* we expect to find existing buddy because it's pinned */ @@ -4310,8 +4318,10 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, repeat: /* allocate space in core */ *errp = ext4_mb_regular_allocator(ac); - if (*errp) + if (*errp) { + ext4_discard_allocated_blocks(ac); goto errout; + } /* as we've just preallocated more space than * user requested orinally, we store allocated @@ -4333,10 +4343,10 @@ repeat: ac->ac_b_ex.fe_len = 0; ac->ac_status = AC_STATUS_CONTINUE; goto repeat; - } else if (*errp) - errout: + } else if (*errp) { ext4_discard_allocated_blocks(ac); - else { + goto errout; + } else { block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex); ar->len = ac->ac_b_ex.fe_len; } @@ -4347,6 +4357,7 @@ repeat: *errp = -ENOSPC; } +errout: if (*errp) { ac->ac_b_ex.fe_len = 0; ar->len = 0; @@ -4656,8 +4667,16 @@ do_more: * with group lock held. generate_buddy look at * them with group lock_held */ - if (test_opt(sb, DISCARD)) - ext4_issue_discard(sb, block_group, bit, count); + if (test_opt(sb, DISCARD)) { + err = ext4_issue_discard(sb, block_group, bit, count); + if (err && err != -EOPNOTSUPP) + ext4_msg(sb, KERN_WARNING, "discard request in" + " group:%d block:%d count:%lu failed" + " with %d", block_group, bit, count, + err); + } + + ext4_lock_group(sb, block_group); mb_clear_bits(bitmap_bh->b_data, bit, count_clusters); mb_free_blocks(inode, &e4b, bit, count_clusters); @@ -4851,10 +4870,11 @@ error_return: * one will allocate those blocks, mark it as used in buddy bitmap. This must * be called with under the group lock. */ -static void ext4_trim_extent(struct super_block *sb, int start, int count, +static int ext4_trim_extent(struct super_block *sb, int start, int count, ext4_group_t group, struct ext4_buddy *e4b) { struct ext4_free_extent ex; + int ret = 0; trace_ext4_trim_extent(sb, group, start, count); @@ -4870,9 +4890,10 @@ static void ext4_trim_extent(struct super_block *sb, int start, int count, */ mb_mark_used(e4b, &ex); ext4_unlock_group(sb, group); - ext4_issue_discard(sb, group, start, count); + ret = ext4_issue_discard(sb, group, start, count); ext4_lock_group(sb, group); mb_free_blocks(NULL, e4b, start, ex.fe_len); + return ret; } /** @@ -4901,7 +4922,7 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group, void *bitmap; ext4_grpblk_t next, count = 0, free_count = 0; struct ext4_buddy e4b; - int ret; + int ret = 0; trace_ext4_trim_all_free(sb, group, start, max); @@ -4928,8 +4949,11 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group, next = mb_find_next_bit(bitmap, max + 1, start); if ((next - start) >= minblocks) { - ext4_trim_extent(sb, start, - next - start, group, &e4b); + ret = ext4_trim_extent(sb, start, + next - start, group, &e4b); + if (ret && ret != -EOPNOTSUPP) + break; + ret = 0; count += next - start; } free_count += next - start; @@ -4950,8 +4974,10 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group, break; } - if (!ret) + if (!ret) { + ret = count; EXT4_MB_GRP_SET_TRIMMED(e4b.bd_info); + } out: ext4_unlock_group(sb, group); ext4_mb_unload_buddy(&e4b); @@ -4959,7 +4985,7 @@ out: ext4_debug("trimmed %d blocks in the group %d\n", count, group); - return count; + return ret; } /** diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c index f1bb32ec016..db8226d595f 100644 --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -14,6 +14,7 @@ #include <linux/slab.h> #include "ext4_jbd2.h" +#include "ext4_extents.h" /* * The contiguous blocks details which can be diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index 292daeeed45..d9cc5ee42f5 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -18,6 +18,7 @@ #include <linux/slab.h> #include "ext4_jbd2.h" #include "ext4.h" +#include "ext4_extents.h" /** * get_ext_path - Find an extent path for designated logical block number. diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 6d600a69fc9..f9ed946a448 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -202,13 +202,8 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry, struct inode *inode); /* checksumming functions */ -#define EXT4_DIRENT_TAIL(block, blocksize) \ - ((struct ext4_dir_entry_tail *)(((void *)(block)) + \ - ((blocksize) - \ - sizeof(struct ext4_dir_entry_tail)))) - -static void initialize_dirent_tail(struct ext4_dir_entry_tail *t, - unsigned int blocksize) +void initialize_dirent_tail(struct ext4_dir_entry_tail *t, + unsigned int blocksize) { memset(t, 0, sizeof(struct ext4_dir_entry_tail)); t->det_rec_len = ext4_rec_len_to_disk( @@ -261,6 +256,12 @@ static __le32 ext4_dirent_csum(struct inode *inode, return cpu_to_le32(csum); } +static void warn_no_space_for_csum(struct inode *inode) +{ + ext4_warning(inode->i_sb, "no space in directory inode %lu leaf for " + "checksum. Please run e2fsck -D.", inode->i_ino); +} + int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent) { struct ext4_dir_entry_tail *t; @@ -271,8 +272,7 @@ int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent) t = get_dirent_tail(inode, dirent); if (!t) { - EXT4_ERROR_INODE(inode, "metadata_csum set but no space in dir " - "leaf for checksum. Please run e2fsck -D."); + warn_no_space_for_csum(inode); return 0; } @@ -294,8 +294,7 @@ static void ext4_dirent_csum_set(struct inode *inode, t = get_dirent_tail(inode, dirent); if (!t) { - EXT4_ERROR_INODE(inode, "metadata_csum set but no space in dir " - "leaf for checksum. Please run e2fsck -D."); + warn_no_space_for_csum(inode); return; } @@ -303,9 +302,9 @@ static void ext4_dirent_csum_set(struct inode *inode, (void *)t - (void *)dirent); } -static inline int ext4_handle_dirty_dirent_node(handle_t *handle, - struct inode *inode, - struct buffer_head *bh) +int ext4_handle_dirty_dirent_node(handle_t *handle, + struct inode *inode, + struct buffer_head *bh) { ext4_dirent_csum_set(inode, (struct ext4_dir_entry *)bh->b_data); return ext4_handle_dirty_metadata(handle, inode, bh); @@ -377,8 +376,7 @@ static int ext4_dx_csum_verify(struct inode *inode, count = le16_to_cpu(c->count); if (count_offset + (limit * sizeof(struct dx_entry)) > EXT4_BLOCK_SIZE(inode->i_sb) - sizeof(struct dx_tail)) { - EXT4_ERROR_INODE(inode, "metadata_csum set but no space for " - "tree checksum found. Run e2fsck -D."); + warn_no_space_for_csum(inode); return 1; } t = (struct dx_tail *)(((struct dx_entry *)c) + limit); @@ -408,8 +406,7 @@ static void ext4_dx_csum_set(struct inode *inode, struct ext4_dir_entry *dirent) count = le16_to_cpu(c->count); if (count_offset + (limit * sizeof(struct dx_entry)) > EXT4_BLOCK_SIZE(inode->i_sb) - sizeof(struct dx_tail)) { - EXT4_ERROR_INODE(inode, "metadata_csum set but no space for " - "tree checksum. Run e2fsck -D."); + warn_no_space_for_csum(inode); return; } t = (struct dx_tail *)(((struct dx_entry *)c) + limit); @@ -725,7 +722,7 @@ dx_probe(const struct qstr *d_name, struct inode *dir, ext4_warning(dir->i_sb, "Node failed checksum"); brelse(bh); *err = ERR_BAD_DX_DIR; - goto fail; + goto fail2; } set_buffer_verified(bh); @@ -890,6 +887,7 @@ static int htree_dirblock_to_tree(struct file *dir_file, EXT4_DIR_REC_LEN(0)); for (; de < top; de = ext4_next_entry(de, dir->i_sb->s_blocksize)) { if (ext4_check_dir_entry(dir, NULL, de, bh, + bh->b_data, bh->b_size, (block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb)) + ((char *)de - bh->b_data))) { /* On error, skip the f_pos to the next block. */ @@ -1007,6 +1005,15 @@ errout: return (err); } +static inline int search_dirblock(struct buffer_head *bh, + struct inode *dir, + const struct qstr *d_name, + unsigned int offset, + struct ext4_dir_entry_2 **res_dir) +{ + return search_dir(bh, bh->b_data, dir->i_sb->s_blocksize, dir, + d_name, offset, res_dir); +} /* * Directory block splitting, compacting @@ -1081,13 +1088,6 @@ static void dx_insert_block(struct dx_frame *frame, u32 hash, ext4_lblk_t block) dx_set_count(entries, count + 1); } -static void ext4_update_dx_flag(struct inode *inode) -{ - if (!EXT4_HAS_COMPAT_FEATURE(inode->i_sb, - EXT4_FEATURE_COMPAT_DIR_INDEX)) - ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); -} - /* * NOTE! unlike strncmp, ext4_match returns 1 for success, 0 for failure. * @@ -1107,11 +1107,13 @@ static inline int ext4_match (int len, const char * const name, /* * Returns 0 if not found, -1 on failure, and 1 on success */ -static inline int search_dirblock(struct buffer_head *bh, - struct inode *dir, - const struct qstr *d_name, - unsigned int offset, - struct ext4_dir_entry_2 ** res_dir) +int search_dir(struct buffer_head *bh, + char *search_buf, + int buf_size, + struct inode *dir, + const struct qstr *d_name, + unsigned int offset, + struct ext4_dir_entry_2 **res_dir) { struct ext4_dir_entry_2 * de; char * dlimit; @@ -1119,8 +1121,8 @@ static inline int search_dirblock(struct buffer_head *bh, const char *name = d_name->name; int namelen = d_name->len; - de = (struct ext4_dir_entry_2 *) bh->b_data; - dlimit = bh->b_data + dir->i_sb->s_blocksize; + de = (struct ext4_dir_entry_2 *)search_buf; + dlimit = search_buf + buf_size; while ((char *) de < dlimit) { /* this code is executed quadratically often */ /* do minimal checking `by hand' */ @@ -1128,7 +1130,8 @@ static inline int search_dirblock(struct buffer_head *bh, if ((char *) de + namelen <= dlimit && ext4_match (namelen, name, de)) { /* found a match - just to be sure, do a full check */ - if (ext4_check_dir_entry(dir, NULL, de, bh, offset)) + if (ext4_check_dir_entry(dir, NULL, de, bh, bh->b_data, + bh->b_size, offset)) return -1; *res_dir = de; return 1; @@ -1144,6 +1147,21 @@ static inline int search_dirblock(struct buffer_head *bh, return 0; } +static int is_dx_internal_node(struct inode *dir, ext4_lblk_t block, + struct ext4_dir_entry *de) +{ + struct super_block *sb = dir->i_sb; + + if (!is_dx(dir)) + return 0; + if (block == 0) + return 1; + if (de->inode == 0 && + ext4_rec_len_from_disk(de->rec_len, sb->s_blocksize) == + sb->s_blocksize) + return 1; + return 0; +} /* * ext4_find_entry() @@ -1158,7 +1176,8 @@ static inline int search_dirblock(struct buffer_head *bh, */ static struct buffer_head * ext4_find_entry (struct inode *dir, const struct qstr *d_name, - struct ext4_dir_entry_2 ** res_dir) + struct ext4_dir_entry_2 **res_dir, + int *inlined) { struct super_block *sb; struct buffer_head *bh_use[NAMEI_RA_SIZE]; @@ -1179,6 +1198,18 @@ static struct buffer_head * ext4_find_entry (struct inode *dir, namelen = d_name->len; if (namelen > EXT4_NAME_LEN) return NULL; + + if (ext4_has_inline_data(dir)) { + int has_inline_data = 1; + ret = ext4_find_inline_entry(dir, d_name, res_dir, + &has_inline_data); + if (has_inline_data) { + if (inlined) + *inlined = 1; + return ret; + } + } + if ((namelen <= 2) && (name[0] == '.') && (name[1] == '.' || name[1] == '\0')) { /* @@ -1244,6 +1275,8 @@ restart: goto next; } if (!buffer_verified(bh) && + !is_dx_internal_node(dir, block, + (struct ext4_dir_entry *)bh->b_data) && !ext4_dirent_csum_verify(dir, (struct ext4_dir_entry *)bh->b_data)) { EXT4_ERROR_INODE(dir, "checksumming directory " @@ -1361,7 +1394,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi if (dentry->d_name.len > EXT4_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); - bh = ext4_find_entry(dir, &dentry->d_name, &de); + bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL); inode = NULL; if (bh) { __u32 ino = le32_to_cpu(de->inode); @@ -1395,7 +1428,7 @@ struct dentry *ext4_get_parent(struct dentry *child) struct ext4_dir_entry_2 * de; struct buffer_head *bh; - bh = ext4_find_entry(child->d_inode, &dotdot, &de); + bh = ext4_find_entry(child->d_inode, &dotdot, &de, NULL); if (!bh) return ERR_PTR(-ENOENT); ino = le32_to_cpu(de->inode); @@ -1593,6 +1626,63 @@ errout: return NULL; } +int ext4_find_dest_de(struct inode *dir, struct inode *inode, + struct buffer_head *bh, + void *buf, int buf_size, + const char *name, int namelen, + struct ext4_dir_entry_2 **dest_de) +{ + struct ext4_dir_entry_2 *de; + unsigned short reclen = EXT4_DIR_REC_LEN(namelen); + int nlen, rlen; + unsigned int offset = 0; + char *top; + + de = (struct ext4_dir_entry_2 *)buf; + top = buf + buf_size - reclen; + while ((char *) de <= top) { + if (ext4_check_dir_entry(dir, NULL, de, bh, + buf, buf_size, offset)) + return -EIO; + if (ext4_match(namelen, name, de)) + return -EEXIST; + nlen = EXT4_DIR_REC_LEN(de->name_len); + rlen = ext4_rec_len_from_disk(de->rec_len, buf_size); + if ((de->inode ? rlen - nlen : rlen) >= reclen) + break; + de = (struct ext4_dir_entry_2 *)((char *)de + rlen); + offset += rlen; + } + if ((char *) de > top) + return -ENOSPC; + + *dest_de = de; + return 0; +} + +void ext4_insert_dentry(struct inode *inode, + struct ext4_dir_entry_2 *de, + int buf_size, + const char *name, int namelen) +{ + + int nlen, rlen; + + nlen = EXT4_DIR_REC_LEN(de->name_len); + rlen = ext4_rec_len_from_disk(de->rec_len, buf_size); + if (de->inode) { + struct ext4_dir_entry_2 *de1 = + (struct ext4_dir_entry_2 *)((char *)de + nlen); + de1->rec_len = ext4_rec_len_to_disk(rlen - nlen, buf_size); + de->rec_len = ext4_rec_len_to_disk(nlen, buf_size); + de = de1; + } + de->file_type = EXT4_FT_UNKNOWN; + de->inode = cpu_to_le32(inode->i_ino); + ext4_set_de_type(inode->i_sb, de, inode->i_mode); + de->name_len = namelen; + memcpy(de->name, name, namelen); +} /* * Add a new entry into a directory (leaf) block. If de is non-NULL, * it points to a directory entry which is guaranteed to be large @@ -1608,12 +1698,10 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry, struct inode *dir = dentry->d_parent->d_inode; const char *name = dentry->d_name.name; int namelen = dentry->d_name.len; - unsigned int offset = 0; unsigned int blocksize = dir->i_sb->s_blocksize; unsigned short reclen; - int nlen, rlen, err; - char *top; int csum_size = 0; + int err; if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) @@ -1621,22 +1709,11 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry, reclen = EXT4_DIR_REC_LEN(namelen); if (!de) { - de = (struct ext4_dir_entry_2 *)bh->b_data; - top = bh->b_data + (blocksize - csum_size) - reclen; - while ((char *) de <= top) { - if (ext4_check_dir_entry(dir, NULL, de, bh, offset)) - return -EIO; - if (ext4_match(namelen, name, de)) - return -EEXIST; - nlen = EXT4_DIR_REC_LEN(de->name_len); - rlen = ext4_rec_len_from_disk(de->rec_len, blocksize); - if ((de->inode? rlen - nlen: rlen) >= reclen) - break; - de = (struct ext4_dir_entry_2 *)((char *)de + rlen); - offset += rlen; - } - if ((char *) de > top) - return -ENOSPC; + err = ext4_find_dest_de(dir, inode, + bh, bh->b_data, blocksize - csum_size, + name, namelen, &de); + if (err) + return err; } BUFFER_TRACE(bh, "get_write_access"); err = ext4_journal_get_write_access(handle, bh); @@ -1646,19 +1723,8 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry, } /* By now the buffer is marked for journaling */ - nlen = EXT4_DIR_REC_LEN(de->name_len); - rlen = ext4_rec_len_from_disk(de->rec_len, blocksize); - if (de->inode) { - struct ext4_dir_entry_2 *de1 = (struct ext4_dir_entry_2 *)((char *)de + nlen); - de1->rec_len = ext4_rec_len_to_disk(rlen - nlen, blocksize); - de->rec_len = ext4_rec_len_to_disk(nlen, blocksize); - de = de1; - } - de->file_type = EXT4_FT_UNKNOWN; - de->inode = cpu_to_le32(inode->i_ino); - ext4_set_de_type(dir->i_sb, de, inode->i_mode); - de->name_len = namelen; - memcpy(de->name, name, namelen); + ext4_insert_dentry(inode, de, blocksize, name, namelen); + /* * XXX shouldn't update any times until successful * completion of syscall, but too many callers depend @@ -1831,6 +1897,17 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, blocksize = sb->s_blocksize; if (!dentry->d_name.len) return -EINVAL; + + if (ext4_has_inline_data(dir)) { + retval = ext4_try_add_inline_entry(handle, dentry, inode); + if (retval < 0) + return retval; + if (retval == 1) { + retval = 0; + return retval; + } + } + if (is_dx(dir)) { retval = ext4_dx_add_entry(handle, dentry, inode); if (!retval || (retval != ERR_BAD_DX_DIR)) @@ -2036,36 +2113,29 @@ cleanup: } /* - * ext4_delete_entry deletes a directory entry by merging it with the - * previous entry + * ext4_generic_delete_entry deletes a directory entry by merging it + * with the previous entry */ -static int ext4_delete_entry(handle_t *handle, - struct inode *dir, - struct ext4_dir_entry_2 *de_del, - struct buffer_head *bh) +int ext4_generic_delete_entry(handle_t *handle, + struct inode *dir, + struct ext4_dir_entry_2 *de_del, + struct buffer_head *bh, + void *entry_buf, + int buf_size, + int csum_size) { struct ext4_dir_entry_2 *de, *pde; unsigned int blocksize = dir->i_sb->s_blocksize; - int csum_size = 0; - int i, err; - - if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb, - EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) - csum_size = sizeof(struct ext4_dir_entry_tail); + int i; i = 0; pde = NULL; - de = (struct ext4_dir_entry_2 *) bh->b_data; - while (i < bh->b_size - csum_size) { - if (ext4_check_dir_entry(dir, NULL, de, bh, i)) + de = (struct ext4_dir_entry_2 *)entry_buf; + while (i < buf_size - csum_size) { + if (ext4_check_dir_entry(dir, NULL, de, bh, + bh->b_data, bh->b_size, i)) return -EIO; if (de == de_del) { - BUFFER_TRACE(bh, "get_write_access"); - err = ext4_journal_get_write_access(handle, bh); - if (unlikely(err)) { - ext4_std_error(dir->i_sb, err); - return err; - } if (pde) pde->rec_len = ext4_rec_len_to_disk( ext4_rec_len_from_disk(pde->rec_len, @@ -2076,12 +2146,6 @@ static int ext4_delete_entry(handle_t *handle, else de->inode = 0; dir->i_version++; - BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); - err = ext4_handle_dirty_dirent_node(handle, dir, bh); - if (unlikely(err)) { - ext4_std_error(dir->i_sb, err); - return err; - } return 0; } i += ext4_rec_len_from_disk(de->rec_len, blocksize); @@ -2091,6 +2155,48 @@ static int ext4_delete_entry(handle_t *handle, return -ENOENT; } +static int ext4_delete_entry(handle_t *handle, + struct inode *dir, + struct ext4_dir_entry_2 *de_del, + struct buffer_head *bh) +{ + int err, csum_size = 0; + + if (ext4_has_inline_data(dir)) { + int has_inline_data = 1; + err = ext4_delete_inline_entry(handle, dir, de_del, bh, + &has_inline_data); + if (has_inline_data) + return err; + } + + if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb, + EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) + csum_size = sizeof(struct ext4_dir_entry_tail); + + BUFFER_TRACE(bh, "get_write_access"); + err = ext4_journal_get_write_access(handle, bh); + if (unlikely(err)) + goto out; + + err = ext4_generic_delete_entry(handle, dir, de_del, + bh, bh->b_data, + dir->i_sb->s_blocksize, csum_size); + if (err) + goto out; + + BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); + err = ext4_handle_dirty_dirent_node(handle, dir, bh); + if (unlikely(err)) + goto out; + + return 0; +out: + if (err != -ENOENT) + ext4_std_error(dir->i_sb, err); + return err; +} + /* * DIR_NLINK feature is set if 1) nlinks > EXT4_LINK_MAX or 2) nlinks == 2, * since this indicates that nlinks count was previously 1. @@ -2211,21 +2317,94 @@ retry: return err; } -static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) +struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode, + struct ext4_dir_entry_2 *de, + int blocksize, int csum_size, + unsigned int parent_ino, int dotdot_real_len) +{ + de->inode = cpu_to_le32(inode->i_ino); + de->name_len = 1; + de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len), + blocksize); + strcpy(de->name, "."); + ext4_set_de_type(inode->i_sb, de, S_IFDIR); + + de = ext4_next_entry(de, blocksize); + de->inode = cpu_to_le32(parent_ino); + de->name_len = 2; + if (!dotdot_real_len) + de->rec_len = ext4_rec_len_to_disk(blocksize - + (csum_size + EXT4_DIR_REC_LEN(1)), + blocksize); + else + de->rec_len = ext4_rec_len_to_disk( + EXT4_DIR_REC_LEN(de->name_len), blocksize); + strcpy(de->name, ".."); + ext4_set_de_type(inode->i_sb, de, S_IFDIR); + + return ext4_next_entry(de, blocksize); +} + +static int ext4_init_new_dir(handle_t *handle, struct inode *dir, + struct inode *inode) { - handle_t *handle; - struct inode *inode; struct buffer_head *dir_block = NULL; struct ext4_dir_entry_2 *de; struct ext4_dir_entry_tail *t; unsigned int blocksize = dir->i_sb->s_blocksize; int csum_size = 0; - int err, retries = 0; + int err; if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) csum_size = sizeof(struct ext4_dir_entry_tail); + if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) { + err = ext4_try_create_inline_dir(handle, dir, inode); + if (err < 0 && err != -ENOSPC) + goto out; + if (!err) + goto out; + } + + inode->i_size = EXT4_I(inode)->i_disksize = blocksize; + if (!(dir_block = ext4_bread(handle, inode, 0, 1, &err))) { + if (!err) { + err = -EIO; + ext4_error(inode->i_sb, + "Directory hole detected on inode %lu\n", + inode->i_ino); + } + goto out; + } + BUFFER_TRACE(dir_block, "get_write_access"); + err = ext4_journal_get_write_access(handle, dir_block); + if (err) + goto out; + de = (struct ext4_dir_entry_2 *)dir_block->b_data; + ext4_init_dot_dotdot(inode, de, blocksize, csum_size, dir->i_ino, 0); + set_nlink(inode, 2); + if (csum_size) { + t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize); + initialize_dirent_tail(t, blocksize); + } + + BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata"); + err = ext4_handle_dirty_dirent_node(handle, inode, dir_block); + if (err) + goto out; + set_buffer_verified(dir_block); +out: + brelse(dir_block); + return err; +} + +static int ext4_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) +{ + handle_t *handle; + struct inode *inode; + int err, retries = 0; + if (EXT4_DIR_LINK_MAX(dir)) return -EMLINK; @@ -2249,47 +2428,9 @@ retry: inode->i_op = &ext4_dir_inode_operations; inode->i_fop = &ext4_dir_operations; - inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize; - if (!(dir_block = ext4_bread(handle, inode, 0, 1, &err))) { - if (!err) { - err = -EIO; - ext4_error(inode->i_sb, - "Directory hole detected on inode %lu\n", - inode->i_ino); - } - goto out_clear_inode; - } - BUFFER_TRACE(dir_block, "get_write_access"); - err = ext4_journal_get_write_access(handle, dir_block); - if (err) - goto out_clear_inode; - de = (struct ext4_dir_entry_2 *) dir_block->b_data; - de->inode = cpu_to_le32(inode->i_ino); - de->name_len = 1; - de->rec_len = ext4_rec_len_to_disk(EXT4_DIR_REC_LEN(de->name_len), - blocksize); - strcpy(de->name, "."); - ext4_set_de_type(dir->i_sb, de, S_IFDIR); - de = ext4_next_entry(de, blocksize); - de->inode = cpu_to_le32(dir->i_ino); - de->rec_len = ext4_rec_len_to_disk(blocksize - - (csum_size + EXT4_DIR_REC_LEN(1)), - blocksize); - de->name_len = 2; - strcpy(de->name, ".."); - ext4_set_de_type(dir->i_sb, de, S_IFDIR); - set_nlink(inode, 2); - - if (csum_size) { - t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize); - initialize_dirent_tail(t, blocksize); - } - - BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata"); - err = ext4_handle_dirty_dirent_node(handle, inode, dir_block); + err = ext4_init_new_dir(handle, dir, inode); if (err) goto out_clear_inode; - set_buffer_verified(dir_block); err = ext4_mark_inode_dirty(handle, inode); if (!err) err = ext4_add_entry(handle, dentry, inode); @@ -2309,7 +2450,6 @@ out_clear_inode: unlock_new_inode(inode); d_instantiate(dentry, inode); out_stop: - brelse(dir_block); ext4_journal_stop(handle); if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries)) goto retry; @@ -2327,6 +2467,14 @@ static int empty_dir(struct inode *inode) struct super_block *sb; int err = 0; + if (ext4_has_inline_data(inode)) { + int has_inline_data = 1; + + err = empty_inline_dir(inode, &has_inline_data); + if (has_inline_data) + return err; + } + sb = inode->i_sb; if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) || !(bh = ext4_bread(NULL, inode, 0, 0, &err))) { @@ -2393,7 +2541,8 @@ static int empty_dir(struct inode *inode) set_buffer_verified(bh); de = (struct ext4_dir_entry_2 *) bh->b_data; } - if (ext4_check_dir_entry(inode, NULL, de, bh, offset)) { + if (ext4_check_dir_entry(inode, NULL, de, bh, + bh->b_data, bh->b_size, offset)) { de = (struct ext4_dir_entry_2 *)(bh->b_data + sb->s_blocksize); offset = (offset | (sb->s_blocksize - 1)) + 1; @@ -2498,7 +2647,8 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode) struct ext4_iloc iloc; int err = 0; - if (!EXT4_SB(inode->i_sb)->s_journal) + if ((!EXT4_SB(inode->i_sb)->s_journal) && + !(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ORPHAN_FS)) return 0; mutex_lock(&EXT4_SB(inode->i_sb)->s_orphan_lock); @@ -2579,7 +2729,7 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry) return PTR_ERR(handle); retval = -ENOENT; - bh = ext4_find_entry(dir, &dentry->d_name, &de); + bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL); if (!bh) goto end_rmdir; @@ -2644,7 +2794,7 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry) ext4_handle_sync(handle); retval = -ENOENT; - bh = ext4_find_entry(dir, &dentry->d_name, &de); + bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL); if (!bh) goto end_unlink; @@ -2826,8 +2976,39 @@ retry: return err; } -#define PARENT_INO(buffer, size) \ - (ext4_next_entry((struct ext4_dir_entry_2 *)(buffer), size)->inode) + +/* + * Try to find buffer head where contains the parent block. + * It should be the inode block if it is inlined or the 1st block + * if it is a normal dir. + */ +static struct buffer_head *ext4_get_first_dir_block(handle_t *handle, + struct inode *inode, + int *retval, + struct ext4_dir_entry_2 **parent_de, + int *inlined) +{ + struct buffer_head *bh; + + if (!ext4_has_inline_data(inode)) { + if (!(bh = ext4_bread(handle, inode, 0, 0, retval))) { + if (!*retval) { + *retval = -EIO; + ext4_error(inode->i_sb, + "Directory hole detected on inode %lu\n", + inode->i_ino); + } + return NULL; + } + *parent_de = ext4_next_entry( + (struct ext4_dir_entry_2 *)bh->b_data, + inode->i_sb->s_blocksize); + return bh; + } + + *inlined = 1; + return ext4_get_first_inline_block(inode, parent_de, retval); +} /* * Anybody can rename anything with this: the permission checks are left to the @@ -2841,6 +3022,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, struct buffer_head *old_bh, *new_bh, *dir_bh; struct ext4_dir_entry_2 *old_de, *new_de; int retval, force_da_alloc = 0; + int inlined = 0, new_inlined = 0; + struct ext4_dir_entry_2 *parent_de; dquot_initialize(old_dir); dquot_initialize(new_dir); @@ -2860,7 +3043,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) ext4_handle_sync(handle); - old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de); + old_bh = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de, NULL); /* * Check for inode number is _not_ due to possible IO errors. * We might rmdir the source, keep it as pwd of some process @@ -2873,7 +3056,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, goto end_rename; new_inode = new_dentry->d_inode; - new_bh = ext4_find_entry(new_dir, &new_dentry->d_name, &new_de); + new_bh = ext4_find_entry(new_dir, &new_dentry->d_name, + &new_de, &new_inlined); if (new_bh) { if (!new_inode) { brelse(new_bh); @@ -2887,22 +3071,17 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, goto end_rename; } retval = -EIO; - if (!(dir_bh = ext4_bread(handle, old_inode, 0, 0, &retval))) { - if (!retval) { - retval = -EIO; - ext4_error(old_inode->i_sb, - "Directory hole detected on inode %lu\n", - old_inode->i_ino); - } + dir_bh = ext4_get_first_dir_block(handle, old_inode, + &retval, &parent_de, + &inlined); + if (!dir_bh) goto end_rename; - } - if (!buffer_verified(dir_bh) && + if (!inlined && !buffer_verified(dir_bh) && !ext4_dirent_csum_verify(old_inode, (struct ext4_dir_entry *)dir_bh->b_data)) goto end_rename; set_buffer_verified(dir_bh); - if (le32_to_cpu(PARENT_INO(dir_bh->b_data, - old_dir->i_sb->s_blocksize)) != old_dir->i_ino) + if (le32_to_cpu(parent_de->inode) != old_dir->i_ino) goto end_rename; retval = -EMLINK; if (!new_inode && new_dir != old_dir && @@ -2931,10 +3110,13 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, ext4_current_time(new_dir); ext4_mark_inode_dirty(handle, new_dir); BUFFER_TRACE(new_bh, "call ext4_handle_dirty_metadata"); - retval = ext4_handle_dirty_dirent_node(handle, new_dir, new_bh); - if (unlikely(retval)) { - ext4_std_error(new_dir->i_sb, retval); - goto end_rename; + if (!new_inlined) { + retval = ext4_handle_dirty_dirent_node(handle, + new_dir, new_bh); + if (unlikely(retval)) { + ext4_std_error(new_dir->i_sb, retval); + goto end_rename; + } } brelse(new_bh); new_bh = NULL; @@ -2962,7 +3144,8 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, struct buffer_head *old_bh2; struct ext4_dir_entry_2 *old_de2; - old_bh2 = ext4_find_entry(old_dir, &old_dentry->d_name, &old_de2); + old_bh2 = ext4_find_entry(old_dir, &old_dentry->d_name, + &old_de2, NULL); if (old_bh2) { retval = ext4_delete_entry(handle, old_dir, old_de2, old_bh2); @@ -2982,17 +3165,19 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir); ext4_update_dx_flag(old_dir); if (dir_bh) { - PARENT_INO(dir_bh->b_data, new_dir->i_sb->s_blocksize) = - cpu_to_le32(new_dir->i_ino); + parent_de->inode = cpu_to_le32(new_dir->i_ino); BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata"); - if (is_dx(old_inode)) { - retval = ext4_handle_dirty_dx_node(handle, - old_inode, - dir_bh); + if (!inlined) { + if (is_dx(old_inode)) { + retval = ext4_handle_dirty_dx_node(handle, + old_inode, + dir_bh); + } else { + retval = ext4_handle_dirty_dirent_node(handle, + old_inode, dir_bh); + } } else { - retval = ext4_handle_dirty_dirent_node(handle, - old_inode, - dir_bh); + retval = ext4_mark_inode_dirty(handle, old_inode); } if (retval) { ext4_std_error(old_dir->i_sb, retval); @@ -3043,23 +3228,19 @@ const struct inode_operations ext4_dir_inode_operations = { .mknod = ext4_mknod, .rename = ext4_rename, .setattr = ext4_setattr, -#ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, .listxattr = ext4_listxattr, .removexattr = generic_removexattr, -#endif .get_acl = ext4_get_acl, .fiemap = ext4_fiemap, }; const struct inode_operations ext4_special_inode_operations = { .setattr = ext4_setattr, -#ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, .listxattr = ext4_listxattr, .removexattr = generic_removexattr, -#endif .get_acl = ext4_get_acl, }; diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 68e896e12a6..0016fbca2a4 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -27,7 +27,6 @@ #include "ext4_jbd2.h" #include "xattr.h" #include "acl.h" -#include "ext4_extents.h" static struct kmem_cache *io_page_cachep, *io_end_cachep; @@ -111,7 +110,7 @@ static int ext4_end_io(ext4_io_end_t *io) inode_dio_done(inode); /* Wake up anyone waiting on unwritten extent conversion */ if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten)) - wake_up_all(ext4_ioend_wq(io->inode)); + wake_up_all(ext4_ioend_wq(inode)); return ret; } diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 47bf06a2765..d99387b89ed 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -783,7 +783,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, err = ext4_journal_get_write_access(handle, gdb_bh); if (unlikely(err)) - goto exit_sbh; + goto exit_dind; err = ext4_journal_get_write_access(handle, dind); if (unlikely(err)) @@ -792,7 +792,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, /* ext4_reserve_inode_write() gets a reference on the iloc */ err = ext4_reserve_inode_write(handle, inode, &iloc); if (unlikely(err)) - goto exit_dindj; + goto exit_dind; n_group_desc = ext4_kvmalloc((gdb_num + 1) * sizeof(struct buffer_head *), @@ -846,12 +846,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, exit_inode: ext4_kvfree(n_group_desc); - /* ext4_handle_release_buffer(handle, iloc.bh); */ brelse(iloc.bh); -exit_dindj: - /* ext4_handle_release_buffer(handle, dind); */ -exit_sbh: - /* ext4_handle_release_buffer(handle, EXT4_SB(sb)->s_sbh); */ exit_dind: brelse(dind); exit_bh: @@ -969,14 +964,8 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode, } for (i = 0; i < reserved_gdb; i++) { - if ((err = ext4_journal_get_write_access(handle, primary[i]))) { - /* - int j; - for (j = 0; j < i; j++) - ext4_handle_release_buffer(handle, primary[j]); - */ + if ((err = ext4_journal_get_write_access(handle, primary[i]))) goto exit_bh; - } } if ((err = ext4_reserve_inode_write(handle, inode, &iloc))) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 80928f71685..3d4fb81bacd 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -45,7 +45,7 @@ #include <linux/freezer.h> #include "ext4.h" -#include "ext4_extents.h" +#include "ext4_extents.h" /* Needed for trace points definition */ #include "ext4_jbd2.h" #include "xattr.h" #include "acl.h" @@ -939,10 +939,11 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) return NULL; ei->vfs_inode.i_version = 1; - ei->vfs_inode.i_data.writeback_index = 0; memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); INIT_LIST_HEAD(&ei->i_prealloc_list); spin_lock_init(&ei->i_prealloc_lock); + ext4_es_init_tree(&ei->i_es_tree); + rwlock_init(&ei->i_es_lock); ei->i_reserved_data_blocks = 0; ei->i_reserved_meta_blocks = 0; ei->i_allocated_meta_blocks = 0; @@ -996,9 +997,7 @@ static void init_once(void *foo) struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; INIT_LIST_HEAD(&ei->i_orphan); -#ifdef CONFIG_EXT4_FS_XATTR init_rwsem(&ei->xattr_sem); -#endif init_rwsem(&ei->i_data_sem); inode_init_once(&ei->vfs_inode); } @@ -1031,6 +1030,7 @@ void ext4_clear_inode(struct inode *inode) clear_inode(inode); dquot_drop(inode); ext4_discard_preallocations(inode); + ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); if (EXT4_I(inode)->jinode) { jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), EXT4_I(inode)->jinode); @@ -1447,13 +1447,8 @@ static const struct mount_opts { {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_DATAJ}, {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_DATAJ}, {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, MOPT_DATAJ}, -#ifdef CONFIG_EXT4_FS_XATTR {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, -#else - {Opt_user_xattr, 0, MOPT_NOSUPPORT}, - {Opt_nouser_xattr, 0, MOPT_NOSUPPORT}, -#endif #ifdef CONFIG_EXT4_FS_POSIX_ACL {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, @@ -1650,9 +1645,7 @@ static int parse_options(char *options, struct super_block *sb, unsigned int *journal_ioprio, int is_remount) { -#ifdef CONFIG_QUOTA struct ext4_sb_info *sbi = EXT4_SB(sb); -#endif char *p; substring_t args[MAX_OPT_ARGS]; int token; @@ -1701,6 +1694,16 @@ static int parse_options(char *options, struct super_block *sb, } } #endif + if (test_opt(sb, DIOREAD_NOLOCK)) { + int blocksize = + BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); + + if (blocksize < PAGE_CACHE_SIZE) { + ext4_msg(sb, KERN_ERR, "can't mount with " + "dioread_nolock if block size != PAGE_SIZE"); + return 0; + } + } return 1; } @@ -2217,7 +2220,9 @@ static void ext4_orphan_cleanup(struct super_block *sb, __func__, inode->i_ino, inode->i_size); jbd_debug(2, "truncating inode %lu to %lld bytes\n", inode->i_ino, inode->i_size); + mutex_lock(&inode->i_mutex); ext4_truncate(inode); + mutex_unlock(&inode->i_mutex); nr_truncates++; } else { ext4_msg(sb, KERN_DEBUG, @@ -3202,7 +3207,6 @@ int ext4_calculate_overhead(struct super_block *sb) ext4_fsblk_t overhead = 0; char *buf = (char *) get_zeroed_page(GFP_KERNEL); - memset(buf, 0, PAGE_SIZE); if (!buf) return -ENOMEM; @@ -3229,6 +3233,10 @@ int ext4_calculate_overhead(struct super_block *sb) memset(buf, 0, PAGE_SIZE); cond_resched(); } + /* Add the journal blocks as well */ + if (sbi->s_journal) + overhead += EXT4_B2C(sbi, sbi->s_journal->j_maxlen); + sbi->s_overhead = overhead; smp_wmb(); free_page((unsigned long) buf); @@ -3256,7 +3264,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) unsigned int i; int needs_recovery, has_huge_files, has_bigalloc; __u64 blocks_count; - int err; + int err = 0; unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; ext4_group_t first_not_zeroed; @@ -3272,9 +3280,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } sb->s_fs_info = sbi; sbi->s_sb = sb; - sbi->s_mount_opt = 0; - sbi->s_resuid = make_kuid(&init_user_ns, EXT4_DEF_RESUID); - sbi->s_resgid = make_kgid(&init_user_ns, EXT4_DEF_RESGID); sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; sbi->s_sb_block = sb_block; if (sb->s_bdev->bd_part) @@ -3285,6 +3290,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) for (cp = sb->s_id; (cp = strchr(cp, '/'));) *cp = '!'; + /* -EINVAL is default */ ret = -EINVAL; blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); if (!blocksize) { @@ -3369,9 +3375,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (def_mount_opts & EXT4_DEFM_UID16) set_opt(sb, NO_UID32); /* xattr user namespace & acls are now defaulted on */ -#ifdef CONFIG_EXT4_FS_XATTR set_opt(sb, XATTR_USER); -#endif #ifdef CONFIG_EXT4_FS_POSIX_ACL set_opt(sb, POSIX_ACL); #endif @@ -3446,15 +3450,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) clear_opt(sb, DELALLOC); } - blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); - if (test_opt(sb, DIOREAD_NOLOCK)) { - if (blocksize < PAGE_SIZE) { - ext4_msg(sb, KERN_ERR, "can't mount with " - "dioread_nolock if block size != PAGE_SIZE"); - goto failed_mount; - } - } - sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); @@ -3496,6 +3491,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) goto failed_mount; + blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); if (blocksize < EXT4_MIN_BLOCK_SIZE || blocksize > EXT4_MAX_BLOCK_SIZE) { ext4_msg(sb, KERN_ERR, @@ -3662,7 +3658,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) " too large to mount safely on this system"); if (sizeof(sector_t) < 8) ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); - ret = err; goto failed_mount; } @@ -3770,7 +3765,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } if (err) { ext4_msg(sb, KERN_ERR, "insufficient memory"); - ret = err; goto failed_mount3; } @@ -3801,7 +3795,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ mutex_init(&sbi->s_orphan_lock); - sbi->s_resize_flags = 0; sb->s_root = NULL; @@ -3897,8 +3890,8 @@ no_journal: if (es->s_overhead_clusters) sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); else { - ret = ext4_calculate_overhead(sb); - if (ret) + err = ext4_calculate_overhead(sb); + if (err) goto failed_mount_wq; } @@ -3910,6 +3903,7 @@ no_journal: alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); if (!EXT4_SB(sb)->dio_unwritten_wq) { printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); + ret = -ENOMEM; goto failed_mount_wq; } @@ -4012,12 +4006,20 @@ no_journal: /* Enable quota usage during mount. */ if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && !(sb->s_flags & MS_RDONLY)) { - ret = ext4_enable_quotas(sb); - if (ret) + err = ext4_enable_quotas(sb); + if (err) goto failed_mount7; } #endif /* CONFIG_QUOTA */ + if (test_opt(sb, DISCARD)) { + struct request_queue *q = bdev_get_queue(sb->s_bdev); + if (!blk_queue_discard(q)) + ext4_msg(sb, KERN_WARNING, + "mounting with \"discard\" option, but " + "the device does not support discard"); + } + ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, *sbi->s_es->s_mount_opts ? "; " : "", orig_data); @@ -4084,7 +4086,7 @@ out_fail: kfree(sbi); out_free_orig: kfree(orig_data); - return ret; + return err ? err : ret; } /* @@ -4729,7 +4731,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) } ext4_setup_system_zone(sb); - if (sbi->s_journal == NULL) + if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) ext4_commit_super(sb, 1); #ifdef CONFIG_QUOTA @@ -4790,7 +4792,7 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_type = EXT4_SUPER_MAGIC; buf->f_bsize = sb->s_blocksize; - buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, sbi->s_overhead); + buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); /* prevent underflow in case that few free space is available */ @@ -5282,6 +5284,7 @@ static int __init ext4_init_fs(void) ext4_li_info = NULL; mutex_init(&ext4_li_mtx); + /* Build-time check for flags consistency */ ext4_check_flag_values(); for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { @@ -5289,9 +5292,14 @@ static int __init ext4_init_fs(void) init_waitqueue_head(&ext4__ioend_wq[i]); } - err = ext4_init_pageio(); + err = ext4_init_es(); if (err) return err; + + err = ext4_init_pageio(); + if (err) + goto out7; + err = ext4_init_system_zone(); if (err) goto out6; @@ -5341,6 +5349,9 @@ out5: ext4_exit_system_zone(); out6: ext4_exit_pageio(); +out7: + ext4_exit_es(); + return err; } diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c index ed9354aff27..ff371193201 100644 --- a/fs/ext4/symlink.c +++ b/fs/ext4/symlink.c @@ -35,22 +35,18 @@ const struct inode_operations ext4_symlink_inode_operations = { .follow_link = page_follow_link_light, .put_link = page_put_link, .setattr = ext4_setattr, -#ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, .listxattr = ext4_listxattr, .removexattr = generic_removexattr, -#endif }; const struct inode_operations ext4_fast_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = ext4_follow_link, .setattr = ext4_setattr, -#ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, .listxattr = ext4_listxattr, .removexattr = generic_removexattr, -#endif }; diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 2cdb98d6298..3a91ebc2b66 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -61,11 +61,6 @@ #include "xattr.h" #include "acl.h" -#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data)) -#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr)) -#define BFIRST(bh) ENTRY(BHDR(bh)+1) -#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0) - #ifdef EXT4_XATTR_DEBUG # define ea_idebug(inode, f...) do { \ printk(KERN_DEBUG "inode %s:%lu: ", \ @@ -312,7 +307,7 @@ cleanup: return error; } -static int +int ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name, void *buffer, size_t buffer_size) { @@ -581,21 +576,6 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last, return (*min_offs - ((void *)last - base) - sizeof(__u32)); } -struct ext4_xattr_info { - int name_index; - const char *name; - const void *value; - size_t value_len; -}; - -struct ext4_xattr_search { - struct ext4_xattr_entry *first; - void *base; - void *end; - struct ext4_xattr_entry *here; - int not_found; -}; - static int ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s) { @@ -648,9 +628,14 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s) size. Just replace. */ s->here->e_value_size = cpu_to_le32(i->value_len); - memset(val + size - EXT4_XATTR_PAD, 0, - EXT4_XATTR_PAD); /* Clear pad bytes. */ - memcpy(val, i->value, i->value_len); + if (i->value == EXT4_ZERO_XATTR_VALUE) { + memset(val, 0, size); + } else { + /* Clear pad bytes first. */ + memset(val + size - EXT4_XATTR_PAD, 0, + EXT4_XATTR_PAD); + memcpy(val, i->value, i->value_len); + } return 0; } @@ -689,9 +674,14 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s) size_t size = EXT4_XATTR_SIZE(i->value_len); void *val = s->base + min_offs - size; s->here->e_value_offs = cpu_to_le16(min_offs - size); - memset(val + size - EXT4_XATTR_PAD, 0, - EXT4_XATTR_PAD); /* Clear the pad bytes. */ - memcpy(val, i->value, i->value_len); + if (i->value == EXT4_ZERO_XATTR_VALUE) { + memset(val, 0, size); + } else { + /* Clear the pad bytes first. */ + memset(val + size - EXT4_XATTR_PAD, 0, + EXT4_XATTR_PAD); + memcpy(val, i->value, i->value_len); + } } } return 0; @@ -794,7 +784,6 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, int offset = (char *)s->here - bs->bh->b_data; unlock_buffer(bs->bh); - ext4_handle_release_buffer(handle, bs->bh); if (ce) { mb_cache_entry_release(ce); ce = NULL; @@ -950,14 +939,8 @@ bad_block: #undef header } -struct ext4_xattr_ibody_find { - struct ext4_xattr_search s; - struct ext4_iloc iloc; -}; - -static int -ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i, - struct ext4_xattr_ibody_find *is) +int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i, + struct ext4_xattr_ibody_find *is) { struct ext4_xattr_ibody_header *header; struct ext4_inode *raw_inode; @@ -985,10 +968,47 @@ ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i, return 0; } -static int -ext4_xattr_ibody_set(handle_t *handle, struct inode *inode, - struct ext4_xattr_info *i, - struct ext4_xattr_ibody_find *is) +int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, + struct ext4_xattr_info *i, + struct ext4_xattr_ibody_find *is) +{ + struct ext4_xattr_ibody_header *header; + struct ext4_xattr_search *s = &is->s; + int error; + + if (EXT4_I(inode)->i_extra_isize == 0) + return -ENOSPC; + error = ext4_xattr_set_entry(i, s); + if (error) { + if (error == -ENOSPC && + ext4_has_inline_data(inode)) { + error = ext4_try_to_evict_inline_data(handle, inode, + EXT4_XATTR_LEN(strlen(i->name) + + EXT4_XATTR_SIZE(i->value_len))); + if (error) + return error; + error = ext4_xattr_ibody_find(inode, i, is); + if (error) + return error; + error = ext4_xattr_set_entry(i, s); + } + if (error) + return error; + } + header = IHDR(inode, ext4_raw_inode(&is->iloc)); + if (!IS_LAST_ENTRY(s->first)) { + header->h_magic = cpu_to_le32(EXT4_XATTR_MAGIC); + ext4_set_inode_state(inode, EXT4_STATE_XATTR); + } else { + header->h_magic = cpu_to_le32(0); + ext4_clear_inode_state(inode, EXT4_STATE_XATTR); + } + return 0; +} + +static int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode, + struct ext4_xattr_info *i, + struct ext4_xattr_ibody_find *is) { struct ext4_xattr_ibody_header *header; struct ext4_xattr_search *s = &is->s; @@ -1144,9 +1164,17 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name, { handle_t *handle; int error, retries = 0; + int credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb); retry: - handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb)); + /* + * In case of inline data, we may push out the data to a block, + * So reserve the journal space first. + */ + if (ext4_has_inline_data(inode)) + credits += ext4_writepage_trans_blocks(inode) + 1; + + handle = ext4_journal_start(inode, credits); if (IS_ERR(handle)) { error = PTR_ERR(handle); } else { diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index 91f31ca7d9a..69eda787a96 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -21,6 +21,7 @@ #define EXT4_XATTR_INDEX_TRUSTED 4 #define EXT4_XATTR_INDEX_LUSTRE 5 #define EXT4_XATTR_INDEX_SECURITY 6 +#define EXT4_XATTR_INDEX_SYSTEM 7 struct ext4_xattr_header { __le32 h_magic; /* magic number for identification */ @@ -65,7 +66,32 @@ struct ext4_xattr_entry { EXT4_I(inode)->i_extra_isize)) #define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1)) -# ifdef CONFIG_EXT4_FS_XATTR +#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data)) +#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr)) +#define BFIRST(bh) ENTRY(BHDR(bh)+1) +#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0) + +#define EXT4_ZERO_XATTR_VALUE ((void *)-1) + +struct ext4_xattr_info { + int name_index; + const char *name; + const void *value; + size_t value_len; +}; + +struct ext4_xattr_search { + struct ext4_xattr_entry *first; + void *base; + void *end; + struct ext4_xattr_entry *here; + int not_found; +}; + +struct ext4_xattr_ibody_find { + struct ext4_xattr_search s; + struct ext4_iloc iloc; +}; extern const struct xattr_handler ext4_xattr_user_handler; extern const struct xattr_handler ext4_xattr_trusted_handler; @@ -90,60 +116,82 @@ extern void ext4_exit_xattr(void); extern const struct xattr_handler *ext4_xattr_handlers[]; -# else /* CONFIG_EXT4_FS_XATTR */ - -static inline int -ext4_xattr_get(struct inode *inode, int name_index, const char *name, - void *buffer, size_t size, int flags) -{ - return -EOPNOTSUPP; -} - -static inline int -ext4_xattr_set(struct inode *inode, int name_index, const char *name, - const void *value, size_t size, int flags) -{ - return -EOPNOTSUPP; -} - -static inline int -ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index, - const char *name, const void *value, size_t size, int flags) -{ - return -EOPNOTSUPP; -} - -static inline void -ext4_xattr_delete_inode(handle_t *handle, struct inode *inode) -{ -} - -static inline void -ext4_xattr_put_super(struct super_block *sb) -{ -} - -static __init inline int -ext4_init_xattr(void) -{ - return 0; -} - -static inline void -ext4_exit_xattr(void) -{ -} - -static inline int -ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize, - struct ext4_inode *raw_inode, handle_t *handle) -{ - return -EOPNOTSUPP; -} - -#define ext4_xattr_handlers NULL - -# endif /* CONFIG_EXT4_FS_XATTR */ +extern int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i, + struct ext4_xattr_ibody_find *is); +extern int ext4_xattr_ibody_get(struct inode *inode, int name_index, + const char *name, + void *buffer, size_t buffer_size); +extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode, + struct ext4_xattr_info *i, + struct ext4_xattr_ibody_find *is); + +extern int ext4_has_inline_data(struct inode *inode); +extern int ext4_get_inline_size(struct inode *inode); +extern int ext4_get_max_inline_size(struct inode *inode); +extern int ext4_find_inline_data_nolock(struct inode *inode); +extern void ext4_write_inline_data(struct inode *inode, + struct ext4_iloc *iloc, + void *buffer, loff_t pos, + unsigned int len); +extern int ext4_prepare_inline_data(handle_t *handle, struct inode *inode, + unsigned int len); +extern int ext4_init_inline_data(handle_t *handle, struct inode *inode, + unsigned int len); +extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode); + +extern int ext4_readpage_inline(struct inode *inode, struct page *page); +extern int ext4_try_to_write_inline_data(struct address_space *mapping, + struct inode *inode, + loff_t pos, unsigned len, + unsigned flags, + struct page **pagep); +extern int ext4_write_inline_data_end(struct inode *inode, + loff_t pos, unsigned len, + unsigned copied, + struct page *page); +extern struct buffer_head * +ext4_journalled_write_inline_data(struct inode *inode, + unsigned len, + struct page *page); +extern int ext4_da_write_inline_data_begin(struct address_space *mapping, + struct inode *inode, + loff_t pos, unsigned len, + unsigned flags, + struct page **pagep, + void **fsdata); +extern int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, + unsigned len, unsigned copied, + struct page *page); +extern int ext4_try_add_inline_entry(handle_t *handle, struct dentry *dentry, + struct inode *inode); +extern int ext4_try_create_inline_dir(handle_t *handle, + struct inode *parent, + struct inode *inode); +extern int ext4_read_inline_dir(struct file *filp, + void *dirent, filldir_t filldir, + int *has_inline_data); +extern struct buffer_head *ext4_find_inline_entry(struct inode *dir, + const struct qstr *d_name, + struct ext4_dir_entry_2 **res_dir, + int *has_inline_data); +extern int ext4_delete_inline_entry(handle_t *handle, + struct inode *dir, + struct ext4_dir_entry_2 *de_del, + struct buffer_head *bh, + int *has_inline_data); +extern int empty_inline_dir(struct inode *dir, int *has_inline_data); +extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, + struct ext4_dir_entry_2 **parent_de, + int *retval); +extern int ext4_inline_data_fiemap(struct inode *inode, + struct fiemap_extent_info *fieinfo, + int *has_inline); +extern int ext4_try_to_evict_inline_data(handle_t *handle, + struct inode *inode, + int needed); +extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline); + +extern int ext4_convert_inline_data(struct inode *inode); #ifdef CONFIG_EXT4_FS_SECURITY extern int ext4_init_security(handle_t *handle, struct inode *inode, diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig new file mode 100644 index 00000000000..fd27e7e6326 --- /dev/null +++ b/fs/f2fs/Kconfig @@ -0,0 +1,53 @@ +config F2FS_FS + tristate "F2FS filesystem support (EXPERIMENTAL)" + depends on BLOCK + help + F2FS is based on Log-structured File System (LFS), which supports + versatile "flash-friendly" features. The design has been focused on + addressing the fundamental issues in LFS, which are snowball effect + of wandering tree and high cleaning overhead. + + Since flash-based storages show different characteristics according to + the internal geometry or flash memory management schemes aka FTL, F2FS + and tools support various parameters not only for configuring on-disk + layout, but also for selecting allocation and cleaning algorithms. + + If unsure, say N. + +config F2FS_STAT_FS + bool "F2FS Status Information" + depends on F2FS_FS && DEBUG_FS + default y + help + /sys/kernel/debug/f2fs/ contains information about all the partitions + mounted as f2fs. Each file shows the whole f2fs information. + + /sys/kernel/debug/f2fs/status includes: + - major file system information managed by f2fs currently + - average SIT information about whole segments + - current memory footprint consumed by f2fs. + +config F2FS_FS_XATTR + bool "F2FS extended attributes" + depends on F2FS_FS + default y + help + Extended attributes are name:value pairs associated with inodes by + the kernel or by users (see the attr(5) manual page, or visit + <http://acl.bestbits.at/> for details). + + If unsure, say N. + +config F2FS_FS_POSIX_ACL + bool "F2FS Access Control Lists" + depends on F2FS_FS_XATTR + select FS_POSIX_ACL + default y + help + Posix Access Control Lists (ACLs) support permissions for users and + gourps beyond the owner/group/world scheme. + + To learn more about Access Control Lists, visit the POSIX ACLs for + Linux website <http://acl.bestbits.at/>. + + If you don't know what Access Control Lists are, say N diff --git a/fs/f2fs/Makefile b/fs/f2fs/Makefile new file mode 100644 index 00000000000..27a0820340b --- /dev/null +++ b/fs/f2fs/Makefile @@ -0,0 +1,7 @@ +obj-$(CONFIG_F2FS_FS) += f2fs.o + +f2fs-y := dir.o file.o inode.o namei.o hash.o super.o +f2fs-y += checkpoint.o gc.o data.o node.o segment.o recovery.o +f2fs-$(CONFIG_F2FS_STAT_FS) += debug.o +f2fs-$(CONFIG_F2FS_FS_XATTR) += xattr.o +f2fs-$(CONFIG_F2FS_FS_POSIX_ACL) += acl.o diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c new file mode 100644 index 00000000000..137af4255da --- /dev/null +++ b/fs/f2fs/acl.c @@ -0,0 +1,412 @@ +/* + * fs/f2fs/acl.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * Portions of this code from linux/fs/ext2/acl.c + * + * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/f2fs_fs.h> +#include "f2fs.h" +#include "xattr.h" +#include "acl.h" + +#define get_inode_mode(i) ((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \ + (F2FS_I(i)->i_acl_mode) : ((i)->i_mode)) + +static inline size_t f2fs_acl_size(int count) +{ + if (count <= 4) { + return sizeof(struct f2fs_acl_header) + + count * sizeof(struct f2fs_acl_entry_short); + } else { + return sizeof(struct f2fs_acl_header) + + 4 * sizeof(struct f2fs_acl_entry_short) + + (count - 4) * sizeof(struct f2fs_acl_entry); + } +} + +static inline int f2fs_acl_count(size_t size) +{ + ssize_t s; + size -= sizeof(struct f2fs_acl_header); + s = size - 4 * sizeof(struct f2fs_acl_entry_short); + if (s < 0) { + if (size % sizeof(struct f2fs_acl_entry_short)) + return -1; + return size / sizeof(struct f2fs_acl_entry_short); + } else { + if (s % sizeof(struct f2fs_acl_entry)) + return -1; + return s / sizeof(struct f2fs_acl_entry) + 4; + } +} + +static struct posix_acl *f2fs_acl_from_disk(const char *value, size_t size) +{ + int i, count; + struct posix_acl *acl; + struct f2fs_acl_header *hdr = (struct f2fs_acl_header *)value; + struct f2fs_acl_entry *entry = (struct f2fs_acl_entry *)(hdr + 1); + const char *end = value + size; + + if (hdr->a_version != cpu_to_le32(F2FS_ACL_VERSION)) + return ERR_PTR(-EINVAL); + + count = f2fs_acl_count(size); + if (count < 0) + return ERR_PTR(-EINVAL); + if (count == 0) + return NULL; + + acl = posix_acl_alloc(count, GFP_KERNEL); + if (!acl) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < count; i++) { + + if ((char *)entry > end) + goto fail; + + acl->a_entries[i].e_tag = le16_to_cpu(entry->e_tag); + acl->a_entries[i].e_perm = le16_to_cpu(entry->e_perm); + + switch (acl->a_entries[i].e_tag) { + case ACL_USER_OBJ: + case ACL_GROUP_OBJ: + case ACL_MASK: + case ACL_OTHER: + entry = (struct f2fs_acl_entry *)((char *)entry + + sizeof(struct f2fs_acl_entry_short)); + break; + + case ACL_USER: + acl->a_entries[i].e_uid = + make_kuid(&init_user_ns, + le32_to_cpu(entry->e_id)); + entry = (struct f2fs_acl_entry *)((char *)entry + + sizeof(struct f2fs_acl_entry)); + break; + case ACL_GROUP: + acl->a_entries[i].e_gid = + make_kgid(&init_user_ns, + le32_to_cpu(entry->e_id)); + entry = (struct f2fs_acl_entry *)((char *)entry + + sizeof(struct f2fs_acl_entry)); + break; + default: + goto fail; + } + } + if ((char *)entry != end) + goto fail; + return acl; +fail: + posix_acl_release(acl); + return ERR_PTR(-EINVAL); +} + +static void *f2fs_acl_to_disk(const struct posix_acl *acl, size_t *size) +{ + struct f2fs_acl_header *f2fs_acl; + struct f2fs_acl_entry *entry; + int i; + + f2fs_acl = kmalloc(sizeof(struct f2fs_acl_header) + acl->a_count * + sizeof(struct f2fs_acl_entry), GFP_KERNEL); + if (!f2fs_acl) + return ERR_PTR(-ENOMEM); + + f2fs_acl->a_version = cpu_to_le32(F2FS_ACL_VERSION); + entry = (struct f2fs_acl_entry *)(f2fs_acl + 1); + + for (i = 0; i < acl->a_count; i++) { + + entry->e_tag = cpu_to_le16(acl->a_entries[i].e_tag); + entry->e_perm = cpu_to_le16(acl->a_entries[i].e_perm); + + switch (acl->a_entries[i].e_tag) { + case ACL_USER: + entry->e_id = cpu_to_le32( + from_kuid(&init_user_ns, + acl->a_entries[i].e_uid)); + entry = (struct f2fs_acl_entry *)((char *)entry + + sizeof(struct f2fs_acl_entry)); + break; + case ACL_GROUP: + entry->e_id = cpu_to_le32( + from_kgid(&init_user_ns, + acl->a_entries[i].e_gid)); + entry = (struct f2fs_acl_entry *)((char *)entry + + sizeof(struct f2fs_acl_entry)); + break; + case ACL_USER_OBJ: + case ACL_GROUP_OBJ: + case ACL_MASK: + case ACL_OTHER: + entry = (struct f2fs_acl_entry *)((char *)entry + + sizeof(struct f2fs_acl_entry_short)); + break; + default: + goto fail; + } + } + *size = f2fs_acl_size(acl->a_count); + return (void *)f2fs_acl; + +fail: + kfree(f2fs_acl); + return ERR_PTR(-EINVAL); +} + +struct posix_acl *f2fs_get_acl(struct inode *inode, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + int name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT; + void *value = NULL; + struct posix_acl *acl; + int retval; + + if (!test_opt(sbi, POSIX_ACL)) + return NULL; + + acl = get_cached_acl(inode, type); + if (acl != ACL_NOT_CACHED) + return acl; + + if (type == ACL_TYPE_ACCESS) + name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS; + + retval = f2fs_getxattr(inode, name_index, "", NULL, 0); + if (retval > 0) { + value = kmalloc(retval, GFP_KERNEL); + if (!value) + return ERR_PTR(-ENOMEM); + retval = f2fs_getxattr(inode, name_index, "", value, retval); + } + + if (retval > 0) + acl = f2fs_acl_from_disk(value, retval); + else if (retval == -ENODATA) + acl = NULL; + else + acl = ERR_PTR(retval); + kfree(value); + + if (!IS_ERR(acl)) + set_cached_acl(inode, type, acl); + + return acl; +} + +static int f2fs_set_acl(struct inode *inode, int type, struct posix_acl *acl) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_inode_info *fi = F2FS_I(inode); + int name_index; + void *value = NULL; + size_t size = 0; + int error; + + if (!test_opt(sbi, POSIX_ACL)) + return 0; + if (S_ISLNK(inode->i_mode)) + return -EOPNOTSUPP; + + switch (type) { + case ACL_TYPE_ACCESS: + name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS; + if (acl) { + error = posix_acl_equiv_mode(acl, &inode->i_mode); + if (error < 0) + return error; + set_acl_inode(fi, inode->i_mode); + if (error == 0) + acl = NULL; + } + break; + + case ACL_TYPE_DEFAULT: + name_index = F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT; + if (!S_ISDIR(inode->i_mode)) + return acl ? -EACCES : 0; + break; + + default: + return -EINVAL; + } + + if (acl) { + value = f2fs_acl_to_disk(acl, &size); + if (IS_ERR(value)) { + cond_clear_inode_flag(fi, FI_ACL_MODE); + return (int)PTR_ERR(value); + } + } + + error = f2fs_setxattr(inode, name_index, "", value, size); + + kfree(value); + if (!error) + set_cached_acl(inode, type, acl); + + cond_clear_inode_flag(fi, FI_ACL_MODE); + return error; +} + +int f2fs_init_acl(struct inode *inode, struct inode *dir) +{ + struct posix_acl *acl = NULL; + struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); + int error = 0; + + if (!S_ISLNK(inode->i_mode)) { + if (test_opt(sbi, POSIX_ACL)) { + acl = f2fs_get_acl(dir, ACL_TYPE_DEFAULT); + if (IS_ERR(acl)) + return PTR_ERR(acl); + } + if (!acl) + inode->i_mode &= ~current_umask(); + } + + if (test_opt(sbi, POSIX_ACL) && acl) { + + if (S_ISDIR(inode->i_mode)) { + error = f2fs_set_acl(inode, ACL_TYPE_DEFAULT, acl); + if (error) + goto cleanup; + } + error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode); + if (error < 0) + return error; + if (error > 0) + error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl); + } +cleanup: + posix_acl_release(acl); + return error; +} + +int f2fs_acl_chmod(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct posix_acl *acl; + int error; + mode_t mode = get_inode_mode(inode); + + if (!test_opt(sbi, POSIX_ACL)) + return 0; + if (S_ISLNK(mode)) + return -EOPNOTSUPP; + + acl = f2fs_get_acl(inode, ACL_TYPE_ACCESS); + if (IS_ERR(acl) || !acl) + return PTR_ERR(acl); + + error = posix_acl_chmod(&acl, GFP_KERNEL, mode); + if (error) + return error; + error = f2fs_set_acl(inode, ACL_TYPE_ACCESS, acl); + posix_acl_release(acl); + return error; +} + +static size_t f2fs_xattr_list_acl(struct dentry *dentry, char *list, + size_t list_size, const char *name, size_t name_len, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); + const char *xname = POSIX_ACL_XATTR_DEFAULT; + size_t size; + + if (!test_opt(sbi, POSIX_ACL)) + return 0; + + if (type == ACL_TYPE_ACCESS) + xname = POSIX_ACL_XATTR_ACCESS; + + size = strlen(xname) + 1; + if (list && size <= list_size) + memcpy(list, xname, size); + return size; +} + +static int f2fs_xattr_get_acl(struct dentry *dentry, const char *name, + void *buffer, size_t size, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); + struct posix_acl *acl; + int error; + + if (strcmp(name, "") != 0) + return -EINVAL; + if (!test_opt(sbi, POSIX_ACL)) + return -EOPNOTSUPP; + + acl = f2fs_get_acl(dentry->d_inode, type); + if (IS_ERR(acl)) + return PTR_ERR(acl); + if (!acl) + return -ENODATA; + error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size); + posix_acl_release(acl); + + return error; +} + +static int f2fs_xattr_set_acl(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); + struct inode *inode = dentry->d_inode; + struct posix_acl *acl = NULL; + int error; + + if (strcmp(name, "") != 0) + return -EINVAL; + if (!test_opt(sbi, POSIX_ACL)) + return -EOPNOTSUPP; + if (!inode_owner_or_capable(inode)) + return -EPERM; + + if (value) { + acl = posix_acl_from_xattr(&init_user_ns, value, size); + if (IS_ERR(acl)) + return PTR_ERR(acl); + if (acl) { + error = posix_acl_valid(acl); + if (error) + goto release_and_out; + } + } else { + acl = NULL; + } + + error = f2fs_set_acl(inode, type, acl); + +release_and_out: + posix_acl_release(acl); + return error; +} + +const struct xattr_handler f2fs_xattr_acl_default_handler = { + .prefix = POSIX_ACL_XATTR_DEFAULT, + .flags = ACL_TYPE_DEFAULT, + .list = f2fs_xattr_list_acl, + .get = f2fs_xattr_get_acl, + .set = f2fs_xattr_set_acl, +}; + +const struct xattr_handler f2fs_xattr_acl_access_handler = { + .prefix = POSIX_ACL_XATTR_ACCESS, + .flags = ACL_TYPE_ACCESS, + .list = f2fs_xattr_list_acl, + .get = f2fs_xattr_get_acl, + .set = f2fs_xattr_set_acl, +}; diff --git a/fs/f2fs/acl.h b/fs/f2fs/acl.h new file mode 100644 index 00000000000..80f43067441 --- /dev/null +++ b/fs/f2fs/acl.h @@ -0,0 +1,57 @@ +/* + * fs/f2fs/acl.h + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * Portions of this code from linux/fs/ext2/acl.h + * + * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __F2FS_ACL_H__ +#define __F2FS_ACL_H__ + +#include <linux/posix_acl_xattr.h> + +#define F2FS_ACL_VERSION 0x0001 + +struct f2fs_acl_entry { + __le16 e_tag; + __le16 e_perm; + __le32 e_id; +}; + +struct f2fs_acl_entry_short { + __le16 e_tag; + __le16 e_perm; +}; + +struct f2fs_acl_header { + __le32 a_version; +}; + +#ifdef CONFIG_F2FS_FS_POSIX_ACL + +extern struct posix_acl *f2fs_get_acl(struct inode *inode, int type); +extern int f2fs_acl_chmod(struct inode *inode); +extern int f2fs_init_acl(struct inode *inode, struct inode *dir); +#else +#define f2fs_check_acl NULL +#define f2fs_get_acl NULL +#define f2fs_set_acl NULL + +static inline int f2fs_acl_chmod(struct inode *inode) +{ + return 0; +} + +static inline int f2fs_init_acl(struct inode *inode, struct inode *dir) +{ + return 0; +} +#endif +#endif /* __F2FS_ACL_H__ */ diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c new file mode 100644 index 00000000000..ff3c8439af8 --- /dev/null +++ b/fs/f2fs/checkpoint.c @@ -0,0 +1,793 @@ +/* + * fs/f2fs/checkpoint.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/bio.h> +#include <linux/mpage.h> +#include <linux/writeback.h> +#include <linux/blkdev.h> +#include <linux/f2fs_fs.h> +#include <linux/pagevec.h> +#include <linux/swap.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" + +static struct kmem_cache *orphan_entry_slab; +static struct kmem_cache *inode_entry_slab; + +/* + * We guarantee no failure on the returned page. + */ +struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index) +{ + struct address_space *mapping = sbi->meta_inode->i_mapping; + struct page *page = NULL; +repeat: + page = grab_cache_page(mapping, index); + if (!page) { + cond_resched(); + goto repeat; + } + + /* We wait writeback only inside grab_meta_page() */ + wait_on_page_writeback(page); + SetPageUptodate(page); + return page; +} + +/* + * We guarantee no failure on the returned page. + */ +struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index) +{ + struct address_space *mapping = sbi->meta_inode->i_mapping; + struct page *page; +repeat: + page = grab_cache_page(mapping, index); + if (!page) { + cond_resched(); + goto repeat; + } + if (f2fs_readpage(sbi, page, index, READ_SYNC)) { + f2fs_put_page(page, 1); + goto repeat; + } + mark_page_accessed(page); + + /* We do not allow returning an errorneous page */ + return page; +} + +static int f2fs_write_meta_page(struct page *page, + struct writeback_control *wbc) +{ + struct inode *inode = page->mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + int err; + + wait_on_page_writeback(page); + + err = write_meta_page(sbi, page, wbc); + if (err) { + wbc->pages_skipped++; + set_page_dirty(page); + } + + dec_page_count(sbi, F2FS_DIRTY_META); + + /* In this case, we should not unlock this page */ + if (err != AOP_WRITEPAGE_ACTIVATE) + unlock_page(page); + return err; +} + +static int f2fs_write_meta_pages(struct address_space *mapping, + struct writeback_control *wbc) +{ + struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); + struct block_device *bdev = sbi->sb->s_bdev; + long written; + + if (wbc->for_kupdate) + return 0; + + if (get_pages(sbi, F2FS_DIRTY_META) == 0) + return 0; + + /* if mounting is failed, skip writing node pages */ + mutex_lock(&sbi->cp_mutex); + written = sync_meta_pages(sbi, META, bio_get_nr_vecs(bdev)); + mutex_unlock(&sbi->cp_mutex); + wbc->nr_to_write -= written; + return 0; +} + +long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type, + long nr_to_write) +{ + struct address_space *mapping = sbi->meta_inode->i_mapping; + pgoff_t index = 0, end = LONG_MAX; + struct pagevec pvec; + long nwritten = 0; + struct writeback_control wbc = { + .for_reclaim = 0, + }; + + pagevec_init(&pvec, 0); + + while (index <= end) { + int i, nr_pages; + nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, + PAGECACHE_TAG_DIRTY, + min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); + if (nr_pages == 0) + break; + + for (i = 0; i < nr_pages; i++) { + struct page *page = pvec.pages[i]; + lock_page(page); + BUG_ON(page->mapping != mapping); + BUG_ON(!PageDirty(page)); + clear_page_dirty_for_io(page); + f2fs_write_meta_page(page, &wbc); + if (nwritten++ >= nr_to_write) + break; + } + pagevec_release(&pvec); + cond_resched(); + } + + if (nwritten) + f2fs_submit_bio(sbi, type, nr_to_write == LONG_MAX); + + return nwritten; +} + +static int f2fs_set_meta_page_dirty(struct page *page) +{ + struct address_space *mapping = page->mapping; + struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); + + SetPageUptodate(page); + if (!PageDirty(page)) { + __set_page_dirty_nobuffers(page); + inc_page_count(sbi, F2FS_DIRTY_META); + F2FS_SET_SB_DIRT(sbi); + return 1; + } + return 0; +} + +const struct address_space_operations f2fs_meta_aops = { + .writepage = f2fs_write_meta_page, + .writepages = f2fs_write_meta_pages, + .set_page_dirty = f2fs_set_meta_page_dirty, +}; + +int check_orphan_space(struct f2fs_sb_info *sbi) +{ + unsigned int max_orphans; + int err = 0; + + /* + * considering 512 blocks in a segment 5 blocks are needed for cp + * and log segment summaries. Remaining blocks are used to keep + * orphan entries with the limitation one reserved segment + * for cp pack we can have max 1020*507 orphan entries + */ + max_orphans = (sbi->blocks_per_seg - 5) * F2FS_ORPHANS_PER_BLOCK; + mutex_lock(&sbi->orphan_inode_mutex); + if (sbi->n_orphans >= max_orphans) + err = -ENOSPC; + mutex_unlock(&sbi->orphan_inode_mutex); + return err; +} + +void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) +{ + struct list_head *head, *this; + struct orphan_inode_entry *new = NULL, *orphan = NULL; + + mutex_lock(&sbi->orphan_inode_mutex); + head = &sbi->orphan_inode_list; + list_for_each(this, head) { + orphan = list_entry(this, struct orphan_inode_entry, list); + if (orphan->ino == ino) + goto out; + if (orphan->ino > ino) + break; + orphan = NULL; + } +retry: + new = kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC); + if (!new) { + cond_resched(); + goto retry; + } + new->ino = ino; + + /* add new_oentry into list which is sorted by inode number */ + if (orphan) { + struct orphan_inode_entry *prev; + + /* get previous entry */ + prev = list_entry(orphan->list.prev, typeof(*prev), list); + if (&prev->list != head) + /* insert new orphan inode entry */ + list_add(&new->list, &prev->list); + else + list_add(&new->list, head); + } else { + list_add_tail(&new->list, head); + } + sbi->n_orphans++; +out: + mutex_unlock(&sbi->orphan_inode_mutex); +} + +void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) +{ + struct list_head *this, *next, *head; + struct orphan_inode_entry *orphan; + + mutex_lock(&sbi->orphan_inode_mutex); + head = &sbi->orphan_inode_list; + list_for_each_safe(this, next, head) { + orphan = list_entry(this, struct orphan_inode_entry, list); + if (orphan->ino == ino) { + list_del(&orphan->list); + kmem_cache_free(orphan_entry_slab, orphan); + sbi->n_orphans--; + break; + } + } + mutex_unlock(&sbi->orphan_inode_mutex); +} + +static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) +{ + struct inode *inode = f2fs_iget(sbi->sb, ino); + BUG_ON(IS_ERR(inode)); + clear_nlink(inode); + + /* truncate all the data during iput */ + iput(inode); +} + +int recover_orphan_inodes(struct f2fs_sb_info *sbi) +{ + block_t start_blk, orphan_blkaddr, i, j; + + if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG)) + return 0; + + sbi->por_doing = 1; + start_blk = __start_cp_addr(sbi) + 1; + orphan_blkaddr = __start_sum_addr(sbi) - 1; + + for (i = 0; i < orphan_blkaddr; i++) { + struct page *page = get_meta_page(sbi, start_blk + i); + struct f2fs_orphan_block *orphan_blk; + + orphan_blk = (struct f2fs_orphan_block *)page_address(page); + for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) { + nid_t ino = le32_to_cpu(orphan_blk->ino[j]); + recover_orphan_inode(sbi, ino); + } + f2fs_put_page(page, 1); + } + /* clear Orphan Flag */ + clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG); + sbi->por_doing = 0; + return 0; +} + +static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk) +{ + struct list_head *head, *this, *next; + struct f2fs_orphan_block *orphan_blk = NULL; + struct page *page = NULL; + unsigned int nentries = 0; + unsigned short index = 1; + unsigned short orphan_blocks; + + orphan_blocks = (unsigned short)((sbi->n_orphans + + (F2FS_ORPHANS_PER_BLOCK - 1)) / F2FS_ORPHANS_PER_BLOCK); + + mutex_lock(&sbi->orphan_inode_mutex); + head = &sbi->orphan_inode_list; + + /* loop for each orphan inode entry and write them in Jornal block */ + list_for_each_safe(this, next, head) { + struct orphan_inode_entry *orphan; + + orphan = list_entry(this, struct orphan_inode_entry, list); + + if (nentries == F2FS_ORPHANS_PER_BLOCK) { + /* + * an orphan block is full of 1020 entries, + * then we need to flush current orphan blocks + * and bring another one in memory + */ + orphan_blk->blk_addr = cpu_to_le16(index); + orphan_blk->blk_count = cpu_to_le16(orphan_blocks); + orphan_blk->entry_count = cpu_to_le32(nentries); + set_page_dirty(page); + f2fs_put_page(page, 1); + index++; + start_blk++; + nentries = 0; + page = NULL; + } + if (page) + goto page_exist; + + page = grab_meta_page(sbi, start_blk); + orphan_blk = (struct f2fs_orphan_block *)page_address(page); + memset(orphan_blk, 0, sizeof(*orphan_blk)); +page_exist: + orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino); + } + if (!page) + goto end; + + orphan_blk->blk_addr = cpu_to_le16(index); + orphan_blk->blk_count = cpu_to_le16(orphan_blocks); + orphan_blk->entry_count = cpu_to_le32(nentries); + set_page_dirty(page); + f2fs_put_page(page, 1); +end: + mutex_unlock(&sbi->orphan_inode_mutex); +} + +static struct page *validate_checkpoint(struct f2fs_sb_info *sbi, + block_t cp_addr, unsigned long long *version) +{ + struct page *cp_page_1, *cp_page_2 = NULL; + unsigned long blk_size = sbi->blocksize; + struct f2fs_checkpoint *cp_block; + unsigned long long cur_version = 0, pre_version = 0; + unsigned int crc = 0; + size_t crc_offset; + + /* Read the 1st cp block in this CP pack */ + cp_page_1 = get_meta_page(sbi, cp_addr); + + /* get the version number */ + cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1); + crc_offset = le32_to_cpu(cp_block->checksum_offset); + if (crc_offset >= blk_size) + goto invalid_cp1; + + crc = *(unsigned int *)((unsigned char *)cp_block + crc_offset); + if (!f2fs_crc_valid(crc, cp_block, crc_offset)) + goto invalid_cp1; + + pre_version = le64_to_cpu(cp_block->checkpoint_ver); + + /* Read the 2nd cp block in this CP pack */ + cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1; + cp_page_2 = get_meta_page(sbi, cp_addr); + + cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2); + crc_offset = le32_to_cpu(cp_block->checksum_offset); + if (crc_offset >= blk_size) + goto invalid_cp2; + + crc = *(unsigned int *)((unsigned char *)cp_block + crc_offset); + if (!f2fs_crc_valid(crc, cp_block, crc_offset)) + goto invalid_cp2; + + cur_version = le64_to_cpu(cp_block->checkpoint_ver); + + if (cur_version == pre_version) { + *version = cur_version; + f2fs_put_page(cp_page_2, 1); + return cp_page_1; + } +invalid_cp2: + f2fs_put_page(cp_page_2, 1); +invalid_cp1: + f2fs_put_page(cp_page_1, 1); + return NULL; +} + +int get_valid_checkpoint(struct f2fs_sb_info *sbi) +{ + struct f2fs_checkpoint *cp_block; + struct f2fs_super_block *fsb = sbi->raw_super; + struct page *cp1, *cp2, *cur_page; + unsigned long blk_size = sbi->blocksize; + unsigned long long cp1_version = 0, cp2_version = 0; + unsigned long long cp_start_blk_no; + + sbi->ckpt = kzalloc(blk_size, GFP_KERNEL); + if (!sbi->ckpt) + return -ENOMEM; + /* + * Finding out valid cp block involves read both + * sets( cp pack1 and cp pack 2) + */ + cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr); + cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version); + + /* The second checkpoint pack should start at the next segment */ + cp_start_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg); + cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version); + + if (cp1 && cp2) { + if (ver_after(cp2_version, cp1_version)) + cur_page = cp2; + else + cur_page = cp1; + } else if (cp1) { + cur_page = cp1; + } else if (cp2) { + cur_page = cp2; + } else { + goto fail_no_cp; + } + + cp_block = (struct f2fs_checkpoint *)page_address(cur_page); + memcpy(sbi->ckpt, cp_block, blk_size); + + f2fs_put_page(cp1, 1); + f2fs_put_page(cp2, 1); + return 0; + +fail_no_cp: + kfree(sbi->ckpt); + return -EINVAL; +} + +void set_dirty_dir_page(struct inode *inode, struct page *page) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct list_head *head = &sbi->dir_inode_list; + struct dir_inode_entry *new; + struct list_head *this; + + if (!S_ISDIR(inode->i_mode)) + return; +retry: + new = kmem_cache_alloc(inode_entry_slab, GFP_NOFS); + if (!new) { + cond_resched(); + goto retry; + } + new->inode = inode; + INIT_LIST_HEAD(&new->list); + + spin_lock(&sbi->dir_inode_lock); + list_for_each(this, head) { + struct dir_inode_entry *entry; + entry = list_entry(this, struct dir_inode_entry, list); + if (entry->inode == inode) { + kmem_cache_free(inode_entry_slab, new); + goto out; + } + } + list_add_tail(&new->list, head); + sbi->n_dirty_dirs++; + + BUG_ON(!S_ISDIR(inode->i_mode)); +out: + inc_page_count(sbi, F2FS_DIRTY_DENTS); + inode_inc_dirty_dents(inode); + SetPagePrivate(page); + + spin_unlock(&sbi->dir_inode_lock); +} + +void remove_dirty_dir_inode(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct list_head *head = &sbi->dir_inode_list; + struct list_head *this; + + if (!S_ISDIR(inode->i_mode)) + return; + + spin_lock(&sbi->dir_inode_lock); + if (atomic_read(&F2FS_I(inode)->dirty_dents)) + goto out; + + list_for_each(this, head) { + struct dir_inode_entry *entry; + entry = list_entry(this, struct dir_inode_entry, list); + if (entry->inode == inode) { + list_del(&entry->list); + kmem_cache_free(inode_entry_slab, entry); + sbi->n_dirty_dirs--; + break; + } + } +out: + spin_unlock(&sbi->dir_inode_lock); +} + +void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi) +{ + struct list_head *head = &sbi->dir_inode_list; + struct dir_inode_entry *entry; + struct inode *inode; +retry: + spin_lock(&sbi->dir_inode_lock); + if (list_empty(head)) { + spin_unlock(&sbi->dir_inode_lock); + return; + } + entry = list_entry(head->next, struct dir_inode_entry, list); + inode = igrab(entry->inode); + spin_unlock(&sbi->dir_inode_lock); + if (inode) { + filemap_flush(inode->i_mapping); + iput(inode); + } else { + /* + * We should submit bio, since it exists several + * wribacking dentry pages in the freeing inode. + */ + f2fs_submit_bio(sbi, DATA, true); + } + goto retry; +} + +/* + * Freeze all the FS-operations for checkpoint. + */ +void block_operations(struct f2fs_sb_info *sbi) +{ + int t; + struct writeback_control wbc = { + .sync_mode = WB_SYNC_ALL, + .nr_to_write = LONG_MAX, + .for_reclaim = 0, + }; + + /* Stop renaming operation */ + mutex_lock_op(sbi, RENAME); + mutex_lock_op(sbi, DENTRY_OPS); + +retry_dents: + /* write all the dirty dentry pages */ + sync_dirty_dir_inodes(sbi); + + mutex_lock_op(sbi, DATA_WRITE); + if (get_pages(sbi, F2FS_DIRTY_DENTS)) { + mutex_unlock_op(sbi, DATA_WRITE); + goto retry_dents; + } + + /* block all the operations */ + for (t = DATA_NEW; t <= NODE_TRUNC; t++) + mutex_lock_op(sbi, t); + + mutex_lock(&sbi->write_inode); + + /* + * POR: we should ensure that there is no dirty node pages + * until finishing nat/sit flush. + */ +retry: + sync_node_pages(sbi, 0, &wbc); + + mutex_lock_op(sbi, NODE_WRITE); + + if (get_pages(sbi, F2FS_DIRTY_NODES)) { + mutex_unlock_op(sbi, NODE_WRITE); + goto retry; + } + mutex_unlock(&sbi->write_inode); +} + +static void unblock_operations(struct f2fs_sb_info *sbi) +{ + int t; + for (t = NODE_WRITE; t >= RENAME; t--) + mutex_unlock_op(sbi, t); +} + +static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + nid_t last_nid = 0; + block_t start_blk; + struct page *cp_page; + unsigned int data_sum_blocks, orphan_blocks; + unsigned int crc32 = 0; + void *kaddr; + int i; + + /* Flush all the NAT/SIT pages */ + while (get_pages(sbi, F2FS_DIRTY_META)) + sync_meta_pages(sbi, META, LONG_MAX); + + next_free_nid(sbi, &last_nid); + + /* + * modify checkpoint + * version number is already updated + */ + ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi)); + ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi)); + ckpt->free_segment_count = cpu_to_le32(free_segments(sbi)); + for (i = 0; i < 3; i++) { + ckpt->cur_node_segno[i] = + cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE)); + ckpt->cur_node_blkoff[i] = + cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE)); + ckpt->alloc_type[i + CURSEG_HOT_NODE] = + curseg_alloc_type(sbi, i + CURSEG_HOT_NODE); + } + for (i = 0; i < 3; i++) { + ckpt->cur_data_segno[i] = + cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA)); + ckpt->cur_data_blkoff[i] = + cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA)); + ckpt->alloc_type[i + CURSEG_HOT_DATA] = + curseg_alloc_type(sbi, i + CURSEG_HOT_DATA); + } + + ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi)); + ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi)); + ckpt->next_free_nid = cpu_to_le32(last_nid); + + /* 2 cp + n data seg summary + orphan inode blocks */ + data_sum_blocks = npages_for_summary_flush(sbi); + if (data_sum_blocks < 3) + set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG); + else + clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG); + + orphan_blocks = (sbi->n_orphans + F2FS_ORPHANS_PER_BLOCK - 1) + / F2FS_ORPHANS_PER_BLOCK; + ckpt->cp_pack_start_sum = cpu_to_le32(1 + orphan_blocks); + + if (is_umount) { + set_ckpt_flags(ckpt, CP_UMOUNT_FLAG); + ckpt->cp_pack_total_block_count = cpu_to_le32(2 + + data_sum_blocks + orphan_blocks + NR_CURSEG_NODE_TYPE); + } else { + clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG); + ckpt->cp_pack_total_block_count = cpu_to_le32(2 + + data_sum_blocks + orphan_blocks); + } + + if (sbi->n_orphans) + set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG); + else + clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG); + + /* update SIT/NAT bitmap */ + get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP)); + get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP)); + + crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset)); + *(__le32 *)((unsigned char *)ckpt + + le32_to_cpu(ckpt->checksum_offset)) + = cpu_to_le32(crc32); + + start_blk = __start_cp_addr(sbi); + + /* write out checkpoint buffer at block 0 */ + cp_page = grab_meta_page(sbi, start_blk++); + kaddr = page_address(cp_page); + memcpy(kaddr, ckpt, (1 << sbi->log_blocksize)); + set_page_dirty(cp_page); + f2fs_put_page(cp_page, 1); + + if (sbi->n_orphans) { + write_orphan_inodes(sbi, start_blk); + start_blk += orphan_blocks; + } + + write_data_summaries(sbi, start_blk); + start_blk += data_sum_blocks; + if (is_umount) { + write_node_summaries(sbi, start_blk); + start_blk += NR_CURSEG_NODE_TYPE; + } + + /* writeout checkpoint block */ + cp_page = grab_meta_page(sbi, start_blk); + kaddr = page_address(cp_page); + memcpy(kaddr, ckpt, (1 << sbi->log_blocksize)); + set_page_dirty(cp_page); + f2fs_put_page(cp_page, 1); + + /* wait for previous submitted node/meta pages writeback */ + while (get_pages(sbi, F2FS_WRITEBACK)) + congestion_wait(BLK_RW_ASYNC, HZ / 50); + + filemap_fdatawait_range(sbi->node_inode->i_mapping, 0, LONG_MAX); + filemap_fdatawait_range(sbi->meta_inode->i_mapping, 0, LONG_MAX); + + /* update user_block_counts */ + sbi->last_valid_block_count = sbi->total_valid_block_count; + sbi->alloc_valid_block_count = 0; + + /* Here, we only have one bio having CP pack */ + if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) + sbi->sb->s_flags |= MS_RDONLY; + else + sync_meta_pages(sbi, META_FLUSH, LONG_MAX); + + clear_prefree_segments(sbi); + F2FS_RESET_SB_DIRT(sbi); +} + +/* + * We guarantee that this checkpoint procedure should not fail. + */ +void write_checkpoint(struct f2fs_sb_info *sbi, bool blocked, bool is_umount) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + unsigned long long ckpt_ver; + + if (!blocked) { + mutex_lock(&sbi->cp_mutex); + block_operations(sbi); + } + + f2fs_submit_bio(sbi, DATA, true); + f2fs_submit_bio(sbi, NODE, true); + f2fs_submit_bio(sbi, META, true); + + /* + * update checkpoint pack index + * Increase the version number so that + * SIT entries and seg summaries are written at correct place + */ + ckpt_ver = le64_to_cpu(ckpt->checkpoint_ver); + ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver); + + /* write cached NAT/SIT entries to NAT/SIT area */ + flush_nat_entries(sbi); + flush_sit_entries(sbi); + + reset_victim_segmap(sbi); + + /* unlock all the fs_lock[] in do_checkpoint() */ + do_checkpoint(sbi, is_umount); + + unblock_operations(sbi); + mutex_unlock(&sbi->cp_mutex); +} + +void init_orphan_info(struct f2fs_sb_info *sbi) +{ + mutex_init(&sbi->orphan_inode_mutex); + INIT_LIST_HEAD(&sbi->orphan_inode_list); + sbi->n_orphans = 0; +} + +int __init create_checkpoint_caches(void) +{ + orphan_entry_slab = f2fs_kmem_cache_create("f2fs_orphan_entry", + sizeof(struct orphan_inode_entry), NULL); + if (unlikely(!orphan_entry_slab)) + return -ENOMEM; + inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry", + sizeof(struct dir_inode_entry), NULL); + if (unlikely(!inode_entry_slab)) { + kmem_cache_destroy(orphan_entry_slab); + return -ENOMEM; + } + return 0; +} + +void destroy_checkpoint_caches(void) +{ + kmem_cache_destroy(orphan_entry_slab); + kmem_cache_destroy(inode_entry_slab); +} diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c new file mode 100644 index 00000000000..7bd22a20112 --- /dev/null +++ b/fs/f2fs/data.c @@ -0,0 +1,718 @@ +/* + * fs/f2fs/data.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/buffer_head.h> +#include <linux/mpage.h> +#include <linux/writeback.h> +#include <linux/backing-dev.h> +#include <linux/blkdev.h> +#include <linux/bio.h> +#include <linux/prefetch.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" + +/* + * Lock ordering for the change of data block address: + * ->data_page + * ->node_page + * update block addresses in the node page + */ +static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr) +{ + struct f2fs_node *rn; + __le32 *addr_array; + struct page *node_page = dn->node_page; + unsigned int ofs_in_node = dn->ofs_in_node; + + wait_on_page_writeback(node_page); + + rn = (struct f2fs_node *)page_address(node_page); + + /* Get physical address of data block */ + addr_array = blkaddr_in_node(rn); + addr_array[ofs_in_node] = cpu_to_le32(new_addr); + set_page_dirty(node_page); +} + +int reserve_new_block(struct dnode_of_data *dn) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + + if (is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)) + return -EPERM; + if (!inc_valid_block_count(sbi, dn->inode, 1)) + return -ENOSPC; + + __set_data_blkaddr(dn, NEW_ADDR); + dn->data_blkaddr = NEW_ADDR; + sync_inode_page(dn); + return 0; +} + +static int check_extent_cache(struct inode *inode, pgoff_t pgofs, + struct buffer_head *bh_result) +{ + struct f2fs_inode_info *fi = F2FS_I(inode); + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + pgoff_t start_fofs, end_fofs; + block_t start_blkaddr; + + read_lock(&fi->ext.ext_lock); + if (fi->ext.len == 0) { + read_unlock(&fi->ext.ext_lock); + return 0; + } + + sbi->total_hit_ext++; + start_fofs = fi->ext.fofs; + end_fofs = fi->ext.fofs + fi->ext.len - 1; + start_blkaddr = fi->ext.blk_addr; + + if (pgofs >= start_fofs && pgofs <= end_fofs) { + unsigned int blkbits = inode->i_sb->s_blocksize_bits; + size_t count; + + clear_buffer_new(bh_result); + map_bh(bh_result, inode->i_sb, + start_blkaddr + pgofs - start_fofs); + count = end_fofs - pgofs + 1; + if (count < (UINT_MAX >> blkbits)) + bh_result->b_size = (count << blkbits); + else + bh_result->b_size = UINT_MAX; + + sbi->read_hit_ext++; + read_unlock(&fi->ext.ext_lock); + return 1; + } + read_unlock(&fi->ext.ext_lock); + return 0; +} + +void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) +{ + struct f2fs_inode_info *fi = F2FS_I(dn->inode); + pgoff_t fofs, start_fofs, end_fofs; + block_t start_blkaddr, end_blkaddr; + + BUG_ON(blk_addr == NEW_ADDR); + fofs = start_bidx_of_node(ofs_of_node(dn->node_page)) + dn->ofs_in_node; + + /* Update the page address in the parent node */ + __set_data_blkaddr(dn, blk_addr); + + write_lock(&fi->ext.ext_lock); + + start_fofs = fi->ext.fofs; + end_fofs = fi->ext.fofs + fi->ext.len - 1; + start_blkaddr = fi->ext.blk_addr; + end_blkaddr = fi->ext.blk_addr + fi->ext.len - 1; + + /* Drop and initialize the matched extent */ + if (fi->ext.len == 1 && fofs == start_fofs) + fi->ext.len = 0; + + /* Initial extent */ + if (fi->ext.len == 0) { + if (blk_addr != NULL_ADDR) { + fi->ext.fofs = fofs; + fi->ext.blk_addr = blk_addr; + fi->ext.len = 1; + } + goto end_update; + } + + /* Frone merge */ + if (fofs == start_fofs - 1 && blk_addr == start_blkaddr - 1) { + fi->ext.fofs--; + fi->ext.blk_addr--; + fi->ext.len++; + goto end_update; + } + + /* Back merge */ + if (fofs == end_fofs + 1 && blk_addr == end_blkaddr + 1) { + fi->ext.len++; + goto end_update; + } + + /* Split the existing extent */ + if (fi->ext.len > 1 && + fofs >= start_fofs && fofs <= end_fofs) { + if ((end_fofs - fofs) < (fi->ext.len >> 1)) { + fi->ext.len = fofs - start_fofs; + } else { + fi->ext.fofs = fofs + 1; + fi->ext.blk_addr = start_blkaddr + + fofs - start_fofs + 1; + fi->ext.len -= fofs - start_fofs + 1; + } + goto end_update; + } + write_unlock(&fi->ext.ext_lock); + return; + +end_update: + write_unlock(&fi->ext.ext_lock); + sync_inode_page(dn); + return; +} + +struct page *find_data_page(struct inode *inode, pgoff_t index) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct address_space *mapping = inode->i_mapping; + struct dnode_of_data dn; + struct page *page; + int err; + + page = find_get_page(mapping, index); + if (page && PageUptodate(page)) + return page; + f2fs_put_page(page, 0); + + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, index, RDONLY_NODE); + if (err) + return ERR_PTR(err); + f2fs_put_dnode(&dn); + + if (dn.data_blkaddr == NULL_ADDR) + return ERR_PTR(-ENOENT); + + /* By fallocate(), there is no cached page, but with NEW_ADDR */ + if (dn.data_blkaddr == NEW_ADDR) + return ERR_PTR(-EINVAL); + + page = grab_cache_page(mapping, index); + if (!page) + return ERR_PTR(-ENOMEM); + + err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC); + if (err) { + f2fs_put_page(page, 1); + return ERR_PTR(err); + } + unlock_page(page); + return page; +} + +/* + * If it tries to access a hole, return an error. + * Because, the callers, functions in dir.c and GC, should be able to know + * whether this page exists or not. + */ +struct page *get_lock_data_page(struct inode *inode, pgoff_t index) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct address_space *mapping = inode->i_mapping; + struct dnode_of_data dn; + struct page *page; + int err; + + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, index, RDONLY_NODE); + if (err) + return ERR_PTR(err); + f2fs_put_dnode(&dn); + + if (dn.data_blkaddr == NULL_ADDR) + return ERR_PTR(-ENOENT); + + page = grab_cache_page(mapping, index); + if (!page) + return ERR_PTR(-ENOMEM); + + if (PageUptodate(page)) + return page; + + BUG_ON(dn.data_blkaddr == NEW_ADDR); + BUG_ON(dn.data_blkaddr == NULL_ADDR); + + err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC); + if (err) { + f2fs_put_page(page, 1); + return ERR_PTR(err); + } + return page; +} + +/* + * Caller ensures that this data page is never allocated. + * A new zero-filled data page is allocated in the page cache. + */ +struct page *get_new_data_page(struct inode *inode, pgoff_t index, + bool new_i_size) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct address_space *mapping = inode->i_mapping; + struct page *page; + struct dnode_of_data dn; + int err; + + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, index, 0); + if (err) + return ERR_PTR(err); + + if (dn.data_blkaddr == NULL_ADDR) { + if (reserve_new_block(&dn)) { + f2fs_put_dnode(&dn); + return ERR_PTR(-ENOSPC); + } + } + f2fs_put_dnode(&dn); + + page = grab_cache_page(mapping, index); + if (!page) + return ERR_PTR(-ENOMEM); + + if (PageUptodate(page)) + return page; + + if (dn.data_blkaddr == NEW_ADDR) { + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + } else { + err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC); + if (err) { + f2fs_put_page(page, 1); + return ERR_PTR(err); + } + } + SetPageUptodate(page); + + if (new_i_size && + i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { + i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); + mark_inode_dirty_sync(inode); + } + return page; +} + +static void read_end_io(struct bio *bio, int err) +{ + const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); + struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; + + do { + struct page *page = bvec->bv_page; + + if (--bvec >= bio->bi_io_vec) + prefetchw(&bvec->bv_page->flags); + + if (uptodate) { + SetPageUptodate(page); + } else { + ClearPageUptodate(page); + SetPageError(page); + } + unlock_page(page); + } while (bvec >= bio->bi_io_vec); + kfree(bio->bi_private); + bio_put(bio); +} + +/* + * Fill the locked page with data located in the block address. + * Read operation is synchronous, and caller must unlock the page. + */ +int f2fs_readpage(struct f2fs_sb_info *sbi, struct page *page, + block_t blk_addr, int type) +{ + struct block_device *bdev = sbi->sb->s_bdev; + bool sync = (type == READ_SYNC); + struct bio *bio; + + /* This page can be already read by other threads */ + if (PageUptodate(page)) { + if (!sync) + unlock_page(page); + return 0; + } + + down_read(&sbi->bio_sem); + + /* Allocate a new bio */ + bio = f2fs_bio_alloc(bdev, 1); + + /* Initialize the bio */ + bio->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); + bio->bi_end_io = read_end_io; + + if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { + kfree(bio->bi_private); + bio_put(bio); + up_read(&sbi->bio_sem); + return -EFAULT; + } + + submit_bio(type, bio); + up_read(&sbi->bio_sem); + + /* wait for read completion if sync */ + if (sync) { + lock_page(page); + if (PageError(page)) + return -EIO; + } + return 0; +} + +/* + * This function should be used by the data read flow only where it + * does not check the "create" flag that indicates block allocation. + * The reason for this special functionality is to exploit VFS readahead + * mechanism. + */ +static int get_data_block_ro(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + unsigned int blkbits = inode->i_sb->s_blocksize_bits; + unsigned maxblocks = bh_result->b_size >> blkbits; + struct dnode_of_data dn; + pgoff_t pgofs; + int err; + + /* Get the page offset from the block offset(iblock) */ + pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits)); + + if (check_extent_cache(inode, pgofs, bh_result)) + return 0; + + /* When reading holes, we need its node page */ + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, pgofs, RDONLY_NODE); + if (err) + return (err == -ENOENT) ? 0 : err; + + /* It does not support data allocation */ + BUG_ON(create); + + if (dn.data_blkaddr != NEW_ADDR && dn.data_blkaddr != NULL_ADDR) { + int i; + unsigned int end_offset; + + end_offset = IS_INODE(dn.node_page) ? + ADDRS_PER_INODE : + ADDRS_PER_BLOCK; + + clear_buffer_new(bh_result); + + /* Give more consecutive addresses for the read ahead */ + for (i = 0; i < end_offset - dn.ofs_in_node; i++) + if (((datablock_addr(dn.node_page, + dn.ofs_in_node + i)) + != (dn.data_blkaddr + i)) || maxblocks == i) + break; + map_bh(bh_result, inode->i_sb, dn.data_blkaddr); + bh_result->b_size = (i << blkbits); + } + f2fs_put_dnode(&dn); + return 0; +} + +static int f2fs_read_data_page(struct file *file, struct page *page) +{ + return mpage_readpage(page, get_data_block_ro); +} + +static int f2fs_read_data_pages(struct file *file, + struct address_space *mapping, + struct list_head *pages, unsigned nr_pages) +{ + return mpage_readpages(mapping, pages, nr_pages, get_data_block_ro); +} + +int do_write_data_page(struct page *page) +{ + struct inode *inode = page->mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + block_t old_blk_addr, new_blk_addr; + struct dnode_of_data dn; + int err = 0; + + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, page->index, RDONLY_NODE); + if (err) + return err; + + old_blk_addr = dn.data_blkaddr; + + /* This page is already truncated */ + if (old_blk_addr == NULL_ADDR) + goto out_writepage; + + set_page_writeback(page); + + /* + * If current allocation needs SSR, + * it had better in-place writes for updated data. + */ + if (old_blk_addr != NEW_ADDR && !is_cold_data(page) && + need_inplace_update(inode)) { + rewrite_data_page(F2FS_SB(inode->i_sb), page, + old_blk_addr); + } else { + write_data_page(inode, page, &dn, + old_blk_addr, &new_blk_addr); + update_extent_cache(new_blk_addr, &dn); + F2FS_I(inode)->data_version = + le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver); + } +out_writepage: + f2fs_put_dnode(&dn); + return err; +} + +static int f2fs_write_data_page(struct page *page, + struct writeback_control *wbc) +{ + struct inode *inode = page->mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + loff_t i_size = i_size_read(inode); + const pgoff_t end_index = ((unsigned long long) i_size) + >> PAGE_CACHE_SHIFT; + unsigned offset; + int err = 0; + + if (page->index < end_index) + goto out; + + /* + * If the offset is out-of-range of file size, + * this page does not have to be written to disk. + */ + offset = i_size & (PAGE_CACHE_SIZE - 1); + if ((page->index >= end_index + 1) || !offset) { + if (S_ISDIR(inode->i_mode)) { + dec_page_count(sbi, F2FS_DIRTY_DENTS); + inode_dec_dirty_dents(inode); + } + goto unlock_out; + } + + zero_user_segment(page, offset, PAGE_CACHE_SIZE); +out: + if (sbi->por_doing) + goto redirty_out; + + if (wbc->for_reclaim && !S_ISDIR(inode->i_mode) && !is_cold_data(page)) + goto redirty_out; + + mutex_lock_op(sbi, DATA_WRITE); + if (S_ISDIR(inode->i_mode)) { + dec_page_count(sbi, F2FS_DIRTY_DENTS); + inode_dec_dirty_dents(inode); + } + err = do_write_data_page(page); + if (err && err != -ENOENT) { + wbc->pages_skipped++; + set_page_dirty(page); + } + mutex_unlock_op(sbi, DATA_WRITE); + + if (wbc->for_reclaim) + f2fs_submit_bio(sbi, DATA, true); + + if (err == -ENOENT) + goto unlock_out; + + clear_cold_data(page); + unlock_page(page); + + if (!wbc->for_reclaim && !S_ISDIR(inode->i_mode)) + f2fs_balance_fs(sbi); + return 0; + +unlock_out: + unlock_page(page); + return (err == -ENOENT) ? 0 : err; + +redirty_out: + wbc->pages_skipped++; + set_page_dirty(page); + return AOP_WRITEPAGE_ACTIVATE; +} + +#define MAX_DESIRED_PAGES_WP 4096 + +static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, + void *data) +{ + struct address_space *mapping = data; + int ret = mapping->a_ops->writepage(page, wbc); + mapping_set_error(mapping, ret); + return ret; +} + +static int f2fs_write_data_pages(struct address_space *mapping, + struct writeback_control *wbc) +{ + struct inode *inode = mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + int ret; + long excess_nrtw = 0, desired_nrtw; + + if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) { + desired_nrtw = MAX_DESIRED_PAGES_WP; + excess_nrtw = desired_nrtw - wbc->nr_to_write; + wbc->nr_to_write = desired_nrtw; + } + + if (!S_ISDIR(inode->i_mode)) + mutex_lock(&sbi->writepages); + ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); + if (!S_ISDIR(inode->i_mode)) + mutex_unlock(&sbi->writepages); + f2fs_submit_bio(sbi, DATA, (wbc->sync_mode == WB_SYNC_ALL)); + + remove_dirty_dir_inode(inode); + + wbc->nr_to_write -= excess_nrtw; + return ret; +} + +static int f2fs_write_begin(struct file *file, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata) +{ + struct inode *inode = mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct page *page; + pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; + struct dnode_of_data dn; + int err = 0; + + /* for nobh_write_end */ + *fsdata = NULL; + + f2fs_balance_fs(sbi); + + page = grab_cache_page_write_begin(mapping, index, flags); + if (!page) + return -ENOMEM; + *pagep = page; + + mutex_lock_op(sbi, DATA_NEW); + + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, index, 0); + if (err) { + mutex_unlock_op(sbi, DATA_NEW); + f2fs_put_page(page, 1); + return err; + } + + if (dn.data_blkaddr == NULL_ADDR) { + err = reserve_new_block(&dn); + if (err) { + f2fs_put_dnode(&dn); + mutex_unlock_op(sbi, DATA_NEW); + f2fs_put_page(page, 1); + return err; + } + } + f2fs_put_dnode(&dn); + + mutex_unlock_op(sbi, DATA_NEW); + + if ((len == PAGE_CACHE_SIZE) || PageUptodate(page)) + return 0; + + if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { + unsigned start = pos & (PAGE_CACHE_SIZE - 1); + unsigned end = start + len; + + /* Reading beyond i_size is simple: memset to zero */ + zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); + return 0; + } + + if (dn.data_blkaddr == NEW_ADDR) { + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + } else { + err = f2fs_readpage(sbi, page, dn.data_blkaddr, READ_SYNC); + if (err) { + f2fs_put_page(page, 1); + return err; + } + } + SetPageUptodate(page); + clear_cold_data(page); + return 0; +} + +static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb, + const struct iovec *iov, loff_t offset, unsigned long nr_segs) +{ + struct file *file = iocb->ki_filp; + struct inode *inode = file->f_mapping->host; + + if (rw == WRITE) + return 0; + + /* Needs synchronization with the cleaner */ + return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, + get_data_block_ro); +} + +static void f2fs_invalidate_data_page(struct page *page, unsigned long offset) +{ + struct inode *inode = page->mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + if (S_ISDIR(inode->i_mode) && PageDirty(page)) { + dec_page_count(sbi, F2FS_DIRTY_DENTS); + inode_dec_dirty_dents(inode); + } + ClearPagePrivate(page); +} + +static int f2fs_release_data_page(struct page *page, gfp_t wait) +{ + ClearPagePrivate(page); + return 0; +} + +static int f2fs_set_data_page_dirty(struct page *page) +{ + struct address_space *mapping = page->mapping; + struct inode *inode = mapping->host; + + SetPageUptodate(page); + if (!PageDirty(page)) { + __set_page_dirty_nobuffers(page); + set_dirty_dir_page(inode, page); + return 1; + } + return 0; +} + +static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) +{ + return generic_block_bmap(mapping, block, get_data_block_ro); +} + +const struct address_space_operations f2fs_dblock_aops = { + .readpage = f2fs_read_data_page, + .readpages = f2fs_read_data_pages, + .writepage = f2fs_write_data_page, + .writepages = f2fs_write_data_pages, + .write_begin = f2fs_write_begin, + .write_end = nobh_write_end, + .set_page_dirty = f2fs_set_data_page_dirty, + .invalidatepage = f2fs_invalidate_data_page, + .releasepage = f2fs_release_data_page, + .direct_IO = f2fs_direct_IO, + .bmap = f2fs_bmap, +}; diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c new file mode 100644 index 00000000000..c8c37307b32 --- /dev/null +++ b/fs/f2fs/debug.c @@ -0,0 +1,353 @@ +/* + * f2fs debugging statistics + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * Copyright (c) 2012 Linux Foundation + * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/fs.h> +#include <linux/backing-dev.h> +#include <linux/proc_fs.h> +#include <linux/f2fs_fs.h> +#include <linux/blkdev.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" +#include "gc.h" + +static LIST_HEAD(f2fs_stat_list); +static struct dentry *debugfs_root; +static DEFINE_MUTEX(f2fs_stat_mutex); + +static void update_general_status(struct f2fs_sb_info *sbi) +{ + struct f2fs_stat_info *si = sbi->stat_info; + int i; + + /* valid check of the segment numbers */ + si->hit_ext = sbi->read_hit_ext; + si->total_ext = sbi->total_hit_ext; + si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES); + si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS); + si->ndirty_dirs = sbi->n_dirty_dirs; + si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META); + si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg; + si->rsvd_segs = reserved_segments(sbi); + si->overp_segs = overprovision_segments(sbi); + si->valid_count = valid_user_blocks(sbi); + si->valid_node_count = valid_node_count(sbi); + si->valid_inode_count = valid_inode_count(sbi); + si->utilization = utilization(sbi); + + si->free_segs = free_segments(sbi); + si->free_secs = free_sections(sbi); + si->prefree_count = prefree_segments(sbi); + si->dirty_count = dirty_segments(sbi); + si->node_pages = sbi->node_inode->i_mapping->nrpages; + si->meta_pages = sbi->meta_inode->i_mapping->nrpages; + si->nats = NM_I(sbi)->nat_cnt; + si->sits = SIT_I(sbi)->dirty_sentries; + si->fnids = NM_I(sbi)->fcnt; + si->bg_gc = sbi->bg_gc; + si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) + * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) + / 2; + si->util_valid = (int)(written_block_count(sbi) >> + sbi->log_blocks_per_seg) + * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) + / 2; + si->util_invalid = 50 - si->util_free - si->util_valid; + for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { + struct curseg_info *curseg = CURSEG_I(sbi, i); + si->curseg[i] = curseg->segno; + si->cursec[i] = curseg->segno / sbi->segs_per_sec; + si->curzone[i] = si->cursec[i] / sbi->secs_per_zone; + } + + for (i = 0; i < 2; i++) { + si->segment_count[i] = sbi->segment_count[i]; + si->block_count[i] = sbi->block_count[i]; + } +} + +/* + * This function calculates BDF of every segments + */ +static void update_sit_info(struct f2fs_sb_info *sbi) +{ + struct f2fs_stat_info *si = sbi->stat_info; + unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist; + struct sit_info *sit_i = SIT_I(sbi); + unsigned int segno, vblocks; + int ndirty = 0; + + bimodal = 0; + total_vblocks = 0; + blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_blocks_per_seg); + hblks_per_sec = blks_per_sec / 2; + mutex_lock(&sit_i->sentry_lock); + for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) { + vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec); + dist = abs(vblocks - hblks_per_sec); + bimodal += dist * dist; + + if (vblocks > 0 && vblocks < blks_per_sec) { + total_vblocks += vblocks; + ndirty++; + } + } + mutex_unlock(&sit_i->sentry_lock); + dist = sbi->total_sections * hblks_per_sec * hblks_per_sec / 100; + si->bimodal = bimodal / dist; + if (si->dirty_count) + si->avg_vblocks = total_vblocks / ndirty; + else + si->avg_vblocks = 0; +} + +/* + * This function calculates memory footprint. + */ +static void update_mem_info(struct f2fs_sb_info *sbi) +{ + struct f2fs_stat_info *si = sbi->stat_info; + unsigned npages; + + if (si->base_mem) + goto get_cache; + + si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; + si->base_mem += 2 * sizeof(struct f2fs_inode_info); + si->base_mem += sizeof(*sbi->ckpt); + + /* build sm */ + si->base_mem += sizeof(struct f2fs_sm_info); + + /* build sit */ + si->base_mem += sizeof(struct sit_info); + si->base_mem += TOTAL_SEGS(sbi) * sizeof(struct seg_entry); + si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi)); + si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * TOTAL_SEGS(sbi); + if (sbi->segs_per_sec > 1) + si->base_mem += sbi->total_sections * + sizeof(struct sec_entry); + si->base_mem += __bitmap_size(sbi, SIT_BITMAP); + + /* build free segmap */ + si->base_mem += sizeof(struct free_segmap_info); + si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi)); + si->base_mem += f2fs_bitmap_size(sbi->total_sections); + + /* build curseg */ + si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; + si->base_mem += PAGE_CACHE_SIZE * NR_CURSEG_TYPE; + + /* build dirty segmap */ + si->base_mem += sizeof(struct dirty_seglist_info); + si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(TOTAL_SEGS(sbi)); + si->base_mem += 2 * f2fs_bitmap_size(TOTAL_SEGS(sbi)); + + /* buld nm */ + si->base_mem += sizeof(struct f2fs_nm_info); + si->base_mem += __bitmap_size(sbi, NAT_BITMAP); + + /* build gc */ + si->base_mem += sizeof(struct f2fs_gc_kthread); + +get_cache: + /* free nids */ + si->cache_mem = NM_I(sbi)->fcnt; + si->cache_mem += NM_I(sbi)->nat_cnt; + npages = sbi->node_inode->i_mapping->nrpages; + si->cache_mem += npages << PAGE_CACHE_SHIFT; + npages = sbi->meta_inode->i_mapping->nrpages; + si->cache_mem += npages << PAGE_CACHE_SHIFT; + si->cache_mem += sbi->n_orphans * sizeof(struct orphan_inode_entry); + si->cache_mem += sbi->n_dirty_dirs * sizeof(struct dir_inode_entry); +} + +static int stat_show(struct seq_file *s, void *v) +{ + struct f2fs_stat_info *si, *next; + int i = 0; + int j; + + mutex_lock(&f2fs_stat_mutex); + list_for_each_entry_safe(si, next, &f2fs_stat_list, stat_list) { + + update_general_status(si->sbi); + + seq_printf(s, "\n=====[ partition info. #%d ]=====\n", i++); + seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", + si->sit_area_segs, si->nat_area_segs); + seq_printf(s, "[SSA: %d] [MAIN: %d", + si->ssa_area_segs, si->main_area_segs); + seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", + si->overp_segs, si->rsvd_segs); + seq_printf(s, "Utilization: %d%% (%d valid blocks)\n", + si->utilization, si->valid_count); + seq_printf(s, " - Node: %u (Inode: %u, ", + si->valid_node_count, si->valid_inode_count); + seq_printf(s, "Other: %u)\n - Data: %u\n", + si->valid_node_count - si->valid_inode_count, + si->valid_count - si->valid_node_count); + seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", + si->main_area_segs, si->main_area_sections, + si->main_area_zones); + seq_printf(s, " - COLD data: %d, %d, %d\n", + si->curseg[CURSEG_COLD_DATA], + si->cursec[CURSEG_COLD_DATA], + si->curzone[CURSEG_COLD_DATA]); + seq_printf(s, " - WARM data: %d, %d, %d\n", + si->curseg[CURSEG_WARM_DATA], + si->cursec[CURSEG_WARM_DATA], + si->curzone[CURSEG_WARM_DATA]); + seq_printf(s, " - HOT data: %d, %d, %d\n", + si->curseg[CURSEG_HOT_DATA], + si->cursec[CURSEG_HOT_DATA], + si->curzone[CURSEG_HOT_DATA]); + seq_printf(s, " - Dir dnode: %d, %d, %d\n", + si->curseg[CURSEG_HOT_NODE], + si->cursec[CURSEG_HOT_NODE], + si->curzone[CURSEG_HOT_NODE]); + seq_printf(s, " - File dnode: %d, %d, %d\n", + si->curseg[CURSEG_WARM_NODE], + si->cursec[CURSEG_WARM_NODE], + si->curzone[CURSEG_WARM_NODE]); + seq_printf(s, " - Indir nodes: %d, %d, %d\n", + si->curseg[CURSEG_COLD_NODE], + si->cursec[CURSEG_COLD_NODE], + si->curzone[CURSEG_COLD_NODE]); + seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", + si->main_area_segs - si->dirty_count - + si->prefree_count - si->free_segs, + si->dirty_count); + seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", + si->prefree_count, si->free_segs, si->free_secs); + seq_printf(s, "GC calls: %d (BG: %d)\n", + si->call_count, si->bg_gc); + seq_printf(s, " - data segments : %d\n", si->data_segs); + seq_printf(s, " - node segments : %d\n", si->node_segs); + seq_printf(s, "Try to move %d blocks\n", si->tot_blks); + seq_printf(s, " - data blocks : %d\n", si->data_blks); + seq_printf(s, " - node blocks : %d\n", si->node_blks); + seq_printf(s, "\nExtent Hit Ratio: %d / %d\n", + si->hit_ext, si->total_ext); + seq_printf(s, "\nBalancing F2FS Async:\n"); + seq_printf(s, " - nodes %4d in %4d\n", + si->ndirty_node, si->node_pages); + seq_printf(s, " - dents %4d in dirs:%4d\n", + si->ndirty_dent, si->ndirty_dirs); + seq_printf(s, " - meta %4d in %4d\n", + si->ndirty_meta, si->meta_pages); + seq_printf(s, " - NATs %5d > %lu\n", + si->nats, NM_WOUT_THRESHOLD); + seq_printf(s, " - SITs: %5d\n - free_nids: %5d\n", + si->sits, si->fnids); + seq_printf(s, "\nDistribution of User Blocks:"); + seq_printf(s, " [ valid | invalid | free ]\n"); + seq_printf(s, " ["); + + for (j = 0; j < si->util_valid; j++) + seq_printf(s, "-"); + seq_printf(s, "|"); + + for (j = 0; j < si->util_invalid; j++) + seq_printf(s, "-"); + seq_printf(s, "|"); + + for (j = 0; j < si->util_free; j++) + seq_printf(s, "-"); + seq_printf(s, "]\n\n"); + seq_printf(s, "SSR: %u blocks in %u segments\n", + si->block_count[SSR], si->segment_count[SSR]); + seq_printf(s, "LFS: %u blocks in %u segments\n", + si->block_count[LFS], si->segment_count[LFS]); + + /* segment usage info */ + update_sit_info(si->sbi); + seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", + si->bimodal, si->avg_vblocks); + + /* memory footprint */ + update_mem_info(si->sbi); + seq_printf(s, "\nMemory: %u KB = static: %u + cached: %u\n", + (si->base_mem + si->cache_mem) >> 10, + si->base_mem >> 10, si->cache_mem >> 10); + } + mutex_unlock(&f2fs_stat_mutex); + return 0; +} + +static int stat_open(struct inode *inode, struct file *file) +{ + return single_open(file, stat_show, inode->i_private); +} + +static const struct file_operations stat_fops = { + .open = stat_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +int f2fs_build_stats(struct f2fs_sb_info *sbi) +{ + struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); + struct f2fs_stat_info *si; + + sbi->stat_info = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL); + if (!sbi->stat_info) + return -ENOMEM; + + si = sbi->stat_info; + si->all_area_segs = le32_to_cpu(raw_super->segment_count); + si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); + si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); + si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); + si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); + si->main_area_sections = le32_to_cpu(raw_super->section_count); + si->main_area_zones = si->main_area_sections / + le32_to_cpu(raw_super->secs_per_zone); + si->sbi = sbi; + + mutex_lock(&f2fs_stat_mutex); + list_add_tail(&si->stat_list, &f2fs_stat_list); + mutex_unlock(&f2fs_stat_mutex); + + return 0; +} + +void f2fs_destroy_stats(struct f2fs_sb_info *sbi) +{ + struct f2fs_stat_info *si = sbi->stat_info; + + mutex_lock(&f2fs_stat_mutex); + list_del(&si->stat_list); + mutex_unlock(&f2fs_stat_mutex); + + kfree(sbi->stat_info); +} + +void __init f2fs_create_root_stats(void) +{ + debugfs_root = debugfs_create_dir("f2fs", NULL); + if (debugfs_root) + debugfs_create_file("status", S_IRUGO, debugfs_root, + NULL, &stat_fops); +} + +void f2fs_destroy_root_stats(void) +{ + debugfs_remove_recursive(debugfs_root); + debugfs_root = NULL; +} diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c new file mode 100644 index 00000000000..989980e16d0 --- /dev/null +++ b/fs/f2fs/dir.c @@ -0,0 +1,674 @@ +/* + * fs/f2fs/dir.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include "f2fs.h" +#include "node.h" +#include "acl.h" + +static unsigned long dir_blocks(struct inode *inode) +{ + return ((unsigned long long) (i_size_read(inode) + PAGE_CACHE_SIZE - 1)) + >> PAGE_CACHE_SHIFT; +} + +static unsigned int dir_buckets(unsigned int level) +{ + if (level < MAX_DIR_HASH_DEPTH / 2) + return 1 << level; + else + return 1 << ((MAX_DIR_HASH_DEPTH / 2) - 1); +} + +static unsigned int bucket_blocks(unsigned int level) +{ + if (level < MAX_DIR_HASH_DEPTH / 2) + return 2; + else + return 4; +} + +static unsigned char f2fs_filetype_table[F2FS_FT_MAX] = { + [F2FS_FT_UNKNOWN] = DT_UNKNOWN, + [F2FS_FT_REG_FILE] = DT_REG, + [F2FS_FT_DIR] = DT_DIR, + [F2FS_FT_CHRDEV] = DT_CHR, + [F2FS_FT_BLKDEV] = DT_BLK, + [F2FS_FT_FIFO] = DT_FIFO, + [F2FS_FT_SOCK] = DT_SOCK, + [F2FS_FT_SYMLINK] = DT_LNK, +}; + +#define S_SHIFT 12 +static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = { + [S_IFREG >> S_SHIFT] = F2FS_FT_REG_FILE, + [S_IFDIR >> S_SHIFT] = F2FS_FT_DIR, + [S_IFCHR >> S_SHIFT] = F2FS_FT_CHRDEV, + [S_IFBLK >> S_SHIFT] = F2FS_FT_BLKDEV, + [S_IFIFO >> S_SHIFT] = F2FS_FT_FIFO, + [S_IFSOCK >> S_SHIFT] = F2FS_FT_SOCK, + [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK, +}; + +static void set_de_type(struct f2fs_dir_entry *de, struct inode *inode) +{ + mode_t mode = inode->i_mode; + de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT]; +} + +static unsigned long dir_block_index(unsigned int level, unsigned int idx) +{ + unsigned long i; + unsigned long bidx = 0; + + for (i = 0; i < level; i++) + bidx += dir_buckets(i) * bucket_blocks(i); + bidx += idx * bucket_blocks(level); + return bidx; +} + +static bool early_match_name(const char *name, size_t namelen, + f2fs_hash_t namehash, struct f2fs_dir_entry *de) +{ + if (le16_to_cpu(de->name_len) != namelen) + return false; + + if (de->hash_code != namehash) + return false; + + return true; +} + +static struct f2fs_dir_entry *find_in_block(struct page *dentry_page, + const char *name, size_t namelen, int *max_slots, + f2fs_hash_t namehash, struct page **res_page) +{ + struct f2fs_dir_entry *de; + unsigned long bit_pos, end_pos, next_pos; + struct f2fs_dentry_block *dentry_blk = kmap(dentry_page); + int slots; + + bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, + NR_DENTRY_IN_BLOCK, 0); + while (bit_pos < NR_DENTRY_IN_BLOCK) { + de = &dentry_blk->dentry[bit_pos]; + slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); + + if (early_match_name(name, namelen, namehash, de)) { + if (!memcmp(dentry_blk->filename[bit_pos], + name, namelen)) { + *res_page = dentry_page; + goto found; + } + } + next_pos = bit_pos + slots; + bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, + NR_DENTRY_IN_BLOCK, next_pos); + if (bit_pos >= NR_DENTRY_IN_BLOCK) + end_pos = NR_DENTRY_IN_BLOCK; + else + end_pos = bit_pos; + if (*max_slots < end_pos - next_pos) + *max_slots = end_pos - next_pos; + } + + de = NULL; + kunmap(dentry_page); +found: + return de; +} + +static struct f2fs_dir_entry *find_in_level(struct inode *dir, + unsigned int level, const char *name, size_t namelen, + f2fs_hash_t namehash, struct page **res_page) +{ + int s = GET_DENTRY_SLOTS(namelen); + unsigned int nbucket, nblock; + unsigned int bidx, end_block; + struct page *dentry_page; + struct f2fs_dir_entry *de = NULL; + bool room = false; + int max_slots = 0; + + BUG_ON(level > MAX_DIR_HASH_DEPTH); + + nbucket = dir_buckets(level); + nblock = bucket_blocks(level); + + bidx = dir_block_index(level, le32_to_cpu(namehash) % nbucket); + end_block = bidx + nblock; + + for (; bidx < end_block; bidx++) { + /* no need to allocate new dentry pages to all the indices */ + dentry_page = find_data_page(dir, bidx); + if (IS_ERR(dentry_page)) { + room = true; + continue; + } + + de = find_in_block(dentry_page, name, namelen, + &max_slots, namehash, res_page); + if (de) + break; + + if (max_slots >= s) + room = true; + f2fs_put_page(dentry_page, 0); + } + + if (!de && room && F2FS_I(dir)->chash != namehash) { + F2FS_I(dir)->chash = namehash; + F2FS_I(dir)->clevel = level; + } + + return de; +} + +/* + * Find an entry in the specified directory with the wanted name. + * It returns the page where the entry was found (as a parameter - res_page), + * and the entry itself. Page is returned mapped and unlocked. + * Entry is guaranteed to be valid. + */ +struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir, + struct qstr *child, struct page **res_page) +{ + const char *name = child->name; + size_t namelen = child->len; + unsigned long npages = dir_blocks(dir); + struct f2fs_dir_entry *de = NULL; + f2fs_hash_t name_hash; + unsigned int max_depth; + unsigned int level; + + if (npages == 0) + return NULL; + + *res_page = NULL; + + name_hash = f2fs_dentry_hash(name, namelen); + max_depth = F2FS_I(dir)->i_current_depth; + + for (level = 0; level < max_depth; level++) { + de = find_in_level(dir, level, name, + namelen, name_hash, res_page); + if (de) + break; + } + if (!de && F2FS_I(dir)->chash != name_hash) { + F2FS_I(dir)->chash = name_hash; + F2FS_I(dir)->clevel = level - 1; + } + return de; +} + +struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p) +{ + struct page *page = NULL; + struct f2fs_dir_entry *de = NULL; + struct f2fs_dentry_block *dentry_blk = NULL; + + page = get_lock_data_page(dir, 0); + if (IS_ERR(page)) + return NULL; + + dentry_blk = kmap(page); + de = &dentry_blk->dentry[1]; + *p = page; + unlock_page(page); + return de; +} + +ino_t f2fs_inode_by_name(struct inode *dir, struct qstr *qstr) +{ + ino_t res = 0; + struct f2fs_dir_entry *de; + struct page *page; + + de = f2fs_find_entry(dir, qstr, &page); + if (de) { + res = le32_to_cpu(de->ino); + kunmap(page); + f2fs_put_page(page, 0); + } + + return res; +} + +void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de, + struct page *page, struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); + + mutex_lock_op(sbi, DENTRY_OPS); + lock_page(page); + wait_on_page_writeback(page); + de->ino = cpu_to_le32(inode->i_ino); + set_de_type(de, inode); + kunmap(page); + set_page_dirty(page); + dir->i_mtime = dir->i_ctime = CURRENT_TIME; + mark_inode_dirty(dir); + + /* update parent inode number before releasing dentry page */ + F2FS_I(inode)->i_pino = dir->i_ino; + + f2fs_put_page(page, 1); + mutex_unlock_op(sbi, DENTRY_OPS); +} + +void init_dent_inode(struct dentry *dentry, struct page *ipage) +{ + struct f2fs_node *rn; + + if (IS_ERR(ipage)) + return; + + wait_on_page_writeback(ipage); + + /* copy dentry info. to this inode page */ + rn = (struct f2fs_node *)page_address(ipage); + rn->i.i_namelen = cpu_to_le32(dentry->d_name.len); + memcpy(rn->i.i_name, dentry->d_name.name, dentry->d_name.len); + set_page_dirty(ipage); +} + +static int init_inode_metadata(struct inode *inode, struct dentry *dentry) +{ + struct inode *dir = dentry->d_parent->d_inode; + + if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) { + int err; + err = new_inode_page(inode, dentry); + if (err) + return err; + + if (S_ISDIR(inode->i_mode)) { + err = f2fs_make_empty(inode, dir); + if (err) { + remove_inode_page(inode); + return err; + } + } + + err = f2fs_init_acl(inode, dir); + if (err) { + remove_inode_page(inode); + return err; + } + } else { + struct page *ipage; + ipage = get_node_page(F2FS_SB(dir->i_sb), inode->i_ino); + if (IS_ERR(ipage)) + return PTR_ERR(ipage); + set_cold_node(inode, ipage); + init_dent_inode(dentry, ipage); + f2fs_put_page(ipage, 1); + } + if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) { + inc_nlink(inode); + f2fs_write_inode(inode, NULL); + } + return 0; +} + +static void update_parent_metadata(struct inode *dir, struct inode *inode, + unsigned int current_depth) +{ + bool need_dir_update = false; + + if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) { + if (S_ISDIR(inode->i_mode)) { + inc_nlink(dir); + need_dir_update = true; + } + clear_inode_flag(F2FS_I(inode), FI_NEW_INODE); + } + dir->i_mtime = dir->i_ctime = CURRENT_TIME; + if (F2FS_I(dir)->i_current_depth != current_depth) { + F2FS_I(dir)->i_current_depth = current_depth; + need_dir_update = true; + } + + if (need_dir_update) + f2fs_write_inode(dir, NULL); + else + mark_inode_dirty(dir); + + if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) + clear_inode_flag(F2FS_I(inode), FI_INC_LINK); +} + +static int room_for_filename(struct f2fs_dentry_block *dentry_blk, int slots) +{ + int bit_start = 0; + int zero_start, zero_end; +next: + zero_start = find_next_zero_bit_le(&dentry_blk->dentry_bitmap, + NR_DENTRY_IN_BLOCK, + bit_start); + if (zero_start >= NR_DENTRY_IN_BLOCK) + return NR_DENTRY_IN_BLOCK; + + zero_end = find_next_bit_le(&dentry_blk->dentry_bitmap, + NR_DENTRY_IN_BLOCK, + zero_start); + if (zero_end - zero_start >= slots) + return zero_start; + + bit_start = zero_end + 1; + + if (zero_end + 1 >= NR_DENTRY_IN_BLOCK) + return NR_DENTRY_IN_BLOCK; + goto next; +} + +int f2fs_add_link(struct dentry *dentry, struct inode *inode) +{ + unsigned int bit_pos; + unsigned int level; + unsigned int current_depth; + unsigned long bidx, block; + f2fs_hash_t dentry_hash; + struct f2fs_dir_entry *de; + unsigned int nbucket, nblock; + struct inode *dir = dentry->d_parent->d_inode; + struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); + const char *name = dentry->d_name.name; + size_t namelen = dentry->d_name.len; + struct page *dentry_page = NULL; + struct f2fs_dentry_block *dentry_blk = NULL; + int slots = GET_DENTRY_SLOTS(namelen); + int err = 0; + int i; + + dentry_hash = f2fs_dentry_hash(name, dentry->d_name.len); + level = 0; + current_depth = F2FS_I(dir)->i_current_depth; + if (F2FS_I(dir)->chash == dentry_hash) { + level = F2FS_I(dir)->clevel; + F2FS_I(dir)->chash = 0; + } + +start: + if (current_depth == MAX_DIR_HASH_DEPTH) + return -ENOSPC; + + /* Increase the depth, if required */ + if (level == current_depth) + ++current_depth; + + nbucket = dir_buckets(level); + nblock = bucket_blocks(level); + + bidx = dir_block_index(level, (le32_to_cpu(dentry_hash) % nbucket)); + + for (block = bidx; block <= (bidx + nblock - 1); block++) { + mutex_lock_op(sbi, DENTRY_OPS); + dentry_page = get_new_data_page(dir, block, true); + if (IS_ERR(dentry_page)) { + mutex_unlock_op(sbi, DENTRY_OPS); + return PTR_ERR(dentry_page); + } + + dentry_blk = kmap(dentry_page); + bit_pos = room_for_filename(dentry_blk, slots); + if (bit_pos < NR_DENTRY_IN_BLOCK) + goto add_dentry; + + kunmap(dentry_page); + f2fs_put_page(dentry_page, 1); + mutex_unlock_op(sbi, DENTRY_OPS); + } + + /* Move to next level to find the empty slot for new dentry */ + ++level; + goto start; +add_dentry: + err = init_inode_metadata(inode, dentry); + if (err) + goto fail; + + wait_on_page_writeback(dentry_page); + + de = &dentry_blk->dentry[bit_pos]; + de->hash_code = dentry_hash; + de->name_len = cpu_to_le16(namelen); + memcpy(dentry_blk->filename[bit_pos], name, namelen); + de->ino = cpu_to_le32(inode->i_ino); + set_de_type(de, inode); + for (i = 0; i < slots; i++) + test_and_set_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap); + set_page_dirty(dentry_page); + + update_parent_metadata(dir, inode, current_depth); + + /* update parent inode number before releasing dentry page */ + F2FS_I(inode)->i_pino = dir->i_ino; +fail: + kunmap(dentry_page); + f2fs_put_page(dentry_page, 1); + mutex_unlock_op(sbi, DENTRY_OPS); + return err; +} + +/* + * It only removes the dentry from the dentry page,corresponding name + * entry in name page does not need to be touched during deletion. + */ +void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page, + struct inode *inode) +{ + struct f2fs_dentry_block *dentry_blk; + unsigned int bit_pos; + struct address_space *mapping = page->mapping; + struct inode *dir = mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); + int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len)); + void *kaddr = page_address(page); + int i; + + mutex_lock_op(sbi, DENTRY_OPS); + + lock_page(page); + wait_on_page_writeback(page); + + dentry_blk = (struct f2fs_dentry_block *)kaddr; + bit_pos = dentry - (struct f2fs_dir_entry *)dentry_blk->dentry; + for (i = 0; i < slots; i++) + test_and_clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap); + + /* Let's check and deallocate this dentry page */ + bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, + NR_DENTRY_IN_BLOCK, + 0); + kunmap(page); /* kunmap - pair of f2fs_find_entry */ + set_page_dirty(page); + + dir->i_ctime = dir->i_mtime = CURRENT_TIME; + + if (inode && S_ISDIR(inode->i_mode)) { + drop_nlink(dir); + f2fs_write_inode(dir, NULL); + } else { + mark_inode_dirty(dir); + } + + if (inode) { + inode->i_ctime = CURRENT_TIME; + drop_nlink(inode); + if (S_ISDIR(inode->i_mode)) { + drop_nlink(inode); + i_size_write(inode, 0); + } + f2fs_write_inode(inode, NULL); + if (inode->i_nlink == 0) + add_orphan_inode(sbi, inode->i_ino); + } + + if (bit_pos == NR_DENTRY_IN_BLOCK) { + truncate_hole(dir, page->index, page->index + 1); + clear_page_dirty_for_io(page); + ClearPageUptodate(page); + dec_page_count(sbi, F2FS_DIRTY_DENTS); + inode_dec_dirty_dents(dir); + } + f2fs_put_page(page, 1); + + mutex_unlock_op(sbi, DENTRY_OPS); +} + +int f2fs_make_empty(struct inode *inode, struct inode *parent) +{ + struct page *dentry_page; + struct f2fs_dentry_block *dentry_blk; + struct f2fs_dir_entry *de; + void *kaddr; + + dentry_page = get_new_data_page(inode, 0, true); + if (IS_ERR(dentry_page)) + return PTR_ERR(dentry_page); + + kaddr = kmap_atomic(dentry_page); + dentry_blk = (struct f2fs_dentry_block *)kaddr; + + de = &dentry_blk->dentry[0]; + de->name_len = cpu_to_le16(1); + de->hash_code = f2fs_dentry_hash(".", 1); + de->ino = cpu_to_le32(inode->i_ino); + memcpy(dentry_blk->filename[0], ".", 1); + set_de_type(de, inode); + + de = &dentry_blk->dentry[1]; + de->hash_code = f2fs_dentry_hash("..", 2); + de->name_len = cpu_to_le16(2); + de->ino = cpu_to_le32(parent->i_ino); + memcpy(dentry_blk->filename[1], "..", 2); + set_de_type(de, inode); + + test_and_set_bit_le(0, &dentry_blk->dentry_bitmap); + test_and_set_bit_le(1, &dentry_blk->dentry_bitmap); + kunmap_atomic(kaddr); + + set_page_dirty(dentry_page); + f2fs_put_page(dentry_page, 1); + return 0; +} + +bool f2fs_empty_dir(struct inode *dir) +{ + unsigned long bidx; + struct page *dentry_page; + unsigned int bit_pos; + struct f2fs_dentry_block *dentry_blk; + unsigned long nblock = dir_blocks(dir); + + for (bidx = 0; bidx < nblock; bidx++) { + void *kaddr; + dentry_page = get_lock_data_page(dir, bidx); + if (IS_ERR(dentry_page)) { + if (PTR_ERR(dentry_page) == -ENOENT) + continue; + else + return false; + } + + kaddr = kmap_atomic(dentry_page); + dentry_blk = (struct f2fs_dentry_block *)kaddr; + if (bidx == 0) + bit_pos = 2; + else + bit_pos = 0; + bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, + NR_DENTRY_IN_BLOCK, + bit_pos); + kunmap_atomic(kaddr); + + f2fs_put_page(dentry_page, 1); + + if (bit_pos < NR_DENTRY_IN_BLOCK) + return false; + } + return true; +} + +static int f2fs_readdir(struct file *file, void *dirent, filldir_t filldir) +{ + unsigned long pos = file->f_pos; + struct inode *inode = file->f_dentry->d_inode; + unsigned long npages = dir_blocks(inode); + unsigned char *types = NULL; + unsigned int bit_pos = 0, start_bit_pos = 0; + int over = 0; + struct f2fs_dentry_block *dentry_blk = NULL; + struct f2fs_dir_entry *de = NULL; + struct page *dentry_page = NULL; + unsigned int n = 0; + unsigned char d_type = DT_UNKNOWN; + int slots; + + types = f2fs_filetype_table; + bit_pos = (pos % NR_DENTRY_IN_BLOCK); + n = (pos / NR_DENTRY_IN_BLOCK); + + for ( ; n < npages; n++) { + dentry_page = get_lock_data_page(inode, n); + if (IS_ERR(dentry_page)) + continue; + + start_bit_pos = bit_pos; + dentry_blk = kmap(dentry_page); + while (bit_pos < NR_DENTRY_IN_BLOCK) { + d_type = DT_UNKNOWN; + bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, + NR_DENTRY_IN_BLOCK, + bit_pos); + if (bit_pos >= NR_DENTRY_IN_BLOCK) + break; + + de = &dentry_blk->dentry[bit_pos]; + if (types && de->file_type < F2FS_FT_MAX) + d_type = types[de->file_type]; + + over = filldir(dirent, + dentry_blk->filename[bit_pos], + le16_to_cpu(de->name_len), + (n * NR_DENTRY_IN_BLOCK) + bit_pos, + le32_to_cpu(de->ino), d_type); + if (over) { + file->f_pos += bit_pos - start_bit_pos; + goto success; + } + slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); + bit_pos += slots; + } + bit_pos = 0; + file->f_pos = (n + 1) * NR_DENTRY_IN_BLOCK; + kunmap(dentry_page); + f2fs_put_page(dentry_page, 1); + dentry_page = NULL; + } +success: + if (dentry_page && !IS_ERR(dentry_page)) { + kunmap(dentry_page); + f2fs_put_page(dentry_page, 1); + } + + return 0; +} + +const struct file_operations f2fs_dir_operations = { + .llseek = generic_file_llseek, + .read = generic_read_dir, + .readdir = f2fs_readdir, + .fsync = f2fs_sync_file, + .unlocked_ioctl = f2fs_ioctl, +}; diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h new file mode 100644 index 00000000000..c8e2d751ef9 --- /dev/null +++ b/fs/f2fs/f2fs.h @@ -0,0 +1,1087 @@ +/* + * fs/f2fs/f2fs.h + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _LINUX_F2FS_H +#define _LINUX_F2FS_H + +#include <linux/types.h> +#include <linux/page-flags.h> +#include <linux/buffer_head.h> +#include <linux/slab.h> +#include <linux/crc32.h> +#include <linux/magic.h> + +/* + * For mount options + */ +#define F2FS_MOUNT_BG_GC 0x00000001 +#define F2FS_MOUNT_DISABLE_ROLL_FORWARD 0x00000002 +#define F2FS_MOUNT_DISCARD 0x00000004 +#define F2FS_MOUNT_NOHEAP 0x00000008 +#define F2FS_MOUNT_XATTR_USER 0x00000010 +#define F2FS_MOUNT_POSIX_ACL 0x00000020 +#define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040 + +#define clear_opt(sbi, option) (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option) +#define set_opt(sbi, option) (sbi->mount_opt.opt |= F2FS_MOUNT_##option) +#define test_opt(sbi, option) (sbi->mount_opt.opt & F2FS_MOUNT_##option) + +#define ver_after(a, b) (typecheck(unsigned long long, a) && \ + typecheck(unsigned long long, b) && \ + ((long long)((a) - (b)) > 0)) + +typedef u64 block_t; +typedef u32 nid_t; + +struct f2fs_mount_info { + unsigned int opt; +}; + +static inline __u32 f2fs_crc32(void *buff, size_t len) +{ + return crc32_le(F2FS_SUPER_MAGIC, buff, len); +} + +static inline bool f2fs_crc_valid(__u32 blk_crc, void *buff, size_t buff_size) +{ + return f2fs_crc32(buff, buff_size) == blk_crc; +} + +/* + * For checkpoint manager + */ +enum { + NAT_BITMAP, + SIT_BITMAP +}; + +/* for the list of orphan inodes */ +struct orphan_inode_entry { + struct list_head list; /* list head */ + nid_t ino; /* inode number */ +}; + +/* for the list of directory inodes */ +struct dir_inode_entry { + struct list_head list; /* list head */ + struct inode *inode; /* vfs inode pointer */ +}; + +/* for the list of fsync inodes, used only during recovery */ +struct fsync_inode_entry { + struct list_head list; /* list head */ + struct inode *inode; /* vfs inode pointer */ + block_t blkaddr; /* block address locating the last inode */ +}; + +#define nats_in_cursum(sum) (le16_to_cpu(sum->n_nats)) +#define sits_in_cursum(sum) (le16_to_cpu(sum->n_sits)) + +#define nat_in_journal(sum, i) (sum->nat_j.entries[i].ne) +#define nid_in_journal(sum, i) (sum->nat_j.entries[i].nid) +#define sit_in_journal(sum, i) (sum->sit_j.entries[i].se) +#define segno_in_journal(sum, i) (sum->sit_j.entries[i].segno) + +static inline int update_nats_in_cursum(struct f2fs_summary_block *rs, int i) +{ + int before = nats_in_cursum(rs); + rs->n_nats = cpu_to_le16(before + i); + return before; +} + +static inline int update_sits_in_cursum(struct f2fs_summary_block *rs, int i) +{ + int before = sits_in_cursum(rs); + rs->n_sits = cpu_to_le16(before + i); + return before; +} + +/* + * For INODE and NODE manager + */ +#define XATTR_NODE_OFFSET (-1) /* + * store xattrs to one node block per + * file keeping -1 as its node offset to + * distinguish from index node blocks. + */ +#define RDONLY_NODE 1 /* + * specify a read-only mode when getting + * a node block. 0 is read-write mode. + * used by get_dnode_of_data(). + */ +#define F2FS_LINK_MAX 32000 /* maximum link count per file */ + +/* for in-memory extent cache entry */ +struct extent_info { + rwlock_t ext_lock; /* rwlock for consistency */ + unsigned int fofs; /* start offset in a file */ + u32 blk_addr; /* start block address of the extent */ + unsigned int len; /* lenth of the extent */ +}; + +/* + * i_advise uses FADVISE_XXX_BIT. We can add additional hints later. + */ +#define FADVISE_COLD_BIT 0x01 + +struct f2fs_inode_info { + struct inode vfs_inode; /* serve a vfs inode */ + unsigned long i_flags; /* keep an inode flags for ioctl */ + unsigned char i_advise; /* use to give file attribute hints */ + unsigned int i_current_depth; /* use only in directory structure */ + unsigned int i_pino; /* parent inode number */ + umode_t i_acl_mode; /* keep file acl mode temporarily */ + + /* Use below internally in f2fs*/ + unsigned long flags; /* use to pass per-file flags */ + unsigned long long data_version;/* lastes version of data for fsync */ + atomic_t dirty_dents; /* # of dirty dentry pages */ + f2fs_hash_t chash; /* hash value of given file name */ + unsigned int clevel; /* maximum level of given file name */ + nid_t i_xattr_nid; /* node id that contains xattrs */ + struct extent_info ext; /* in-memory extent cache entry */ +}; + +static inline void get_extent_info(struct extent_info *ext, + struct f2fs_extent i_ext) +{ + write_lock(&ext->ext_lock); + ext->fofs = le32_to_cpu(i_ext.fofs); + ext->blk_addr = le32_to_cpu(i_ext.blk_addr); + ext->len = le32_to_cpu(i_ext.len); + write_unlock(&ext->ext_lock); +} + +static inline void set_raw_extent(struct extent_info *ext, + struct f2fs_extent *i_ext) +{ + read_lock(&ext->ext_lock); + i_ext->fofs = cpu_to_le32(ext->fofs); + i_ext->blk_addr = cpu_to_le32(ext->blk_addr); + i_ext->len = cpu_to_le32(ext->len); + read_unlock(&ext->ext_lock); +} + +struct f2fs_nm_info { + block_t nat_blkaddr; /* base disk address of NAT */ + nid_t max_nid; /* maximum possible node ids */ + nid_t init_scan_nid; /* the first nid to be scanned */ + nid_t next_scan_nid; /* the next nid to be scanned */ + + /* NAT cache management */ + struct radix_tree_root nat_root;/* root of the nat entry cache */ + rwlock_t nat_tree_lock; /* protect nat_tree_lock */ + unsigned int nat_cnt; /* the # of cached nat entries */ + struct list_head nat_entries; /* cached nat entry list (clean) */ + struct list_head dirty_nat_entries; /* cached nat entry list (dirty) */ + + /* free node ids management */ + struct list_head free_nid_list; /* a list for free nids */ + spinlock_t free_nid_list_lock; /* protect free nid list */ + unsigned int fcnt; /* the number of free node id */ + struct mutex build_lock; /* lock for build free nids */ + + /* for checkpoint */ + char *nat_bitmap; /* NAT bitmap pointer */ + int bitmap_size; /* bitmap size */ +}; + +/* + * this structure is used as one of function parameters. + * all the information are dedicated to a given direct node block determined + * by the data offset in a file. + */ +struct dnode_of_data { + struct inode *inode; /* vfs inode pointer */ + struct page *inode_page; /* its inode page, NULL is possible */ + struct page *node_page; /* cached direct node page */ + nid_t nid; /* node id of the direct node block */ + unsigned int ofs_in_node; /* data offset in the node page */ + bool inode_page_locked; /* inode page is locked or not */ + block_t data_blkaddr; /* block address of the node block */ +}; + +static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, + struct page *ipage, struct page *npage, nid_t nid) +{ + memset(dn, 0, sizeof(*dn)); + dn->inode = inode; + dn->inode_page = ipage; + dn->node_page = npage; + dn->nid = nid; +} + +/* + * For SIT manager + * + * By default, there are 6 active log areas across the whole main area. + * When considering hot and cold data separation to reduce cleaning overhead, + * we split 3 for data logs and 3 for node logs as hot, warm, and cold types, + * respectively. + * In the current design, you should not change the numbers intentionally. + * Instead, as a mount option such as active_logs=x, you can use 2, 4, and 6 + * logs individually according to the underlying devices. (default: 6) + * Just in case, on-disk layout covers maximum 16 logs that consist of 8 for + * data and 8 for node logs. + */ +#define NR_CURSEG_DATA_TYPE (3) +#define NR_CURSEG_NODE_TYPE (3) +#define NR_CURSEG_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) + +enum { + CURSEG_HOT_DATA = 0, /* directory entry blocks */ + CURSEG_WARM_DATA, /* data blocks */ + CURSEG_COLD_DATA, /* multimedia or GCed data blocks */ + CURSEG_HOT_NODE, /* direct node blocks of directory files */ + CURSEG_WARM_NODE, /* direct node blocks of normal files */ + CURSEG_COLD_NODE, /* indirect node blocks */ + NO_CHECK_TYPE +}; + +struct f2fs_sm_info { + struct sit_info *sit_info; /* whole segment information */ + struct free_segmap_info *free_info; /* free segment information */ + struct dirty_seglist_info *dirty_info; /* dirty segment information */ + struct curseg_info *curseg_array; /* active segment information */ + + struct list_head wblist_head; /* list of under-writeback pages */ + spinlock_t wblist_lock; /* lock for checkpoint */ + + block_t seg0_blkaddr; /* block address of 0'th segment */ + block_t main_blkaddr; /* start block address of main area */ + block_t ssa_blkaddr; /* start block address of SSA area */ + + unsigned int segment_count; /* total # of segments */ + unsigned int main_segments; /* # of segments in main area */ + unsigned int reserved_segments; /* # of reserved segments */ + unsigned int ovp_segments; /* # of overprovision segments */ +}; + +/* + * For directory operation + */ +#define NODE_DIR1_BLOCK (ADDRS_PER_INODE + 1) +#define NODE_DIR2_BLOCK (ADDRS_PER_INODE + 2) +#define NODE_IND1_BLOCK (ADDRS_PER_INODE + 3) +#define NODE_IND2_BLOCK (ADDRS_PER_INODE + 4) +#define NODE_DIND_BLOCK (ADDRS_PER_INODE + 5) + +/* + * For superblock + */ +/* + * COUNT_TYPE for monitoring + * + * f2fs monitors the number of several block types such as on-writeback, + * dirty dentry blocks, dirty node blocks, and dirty meta blocks. + */ +enum count_type { + F2FS_WRITEBACK, + F2FS_DIRTY_DENTS, + F2FS_DIRTY_NODES, + F2FS_DIRTY_META, + NR_COUNT_TYPE, +}; + +/* + * FS_LOCK nesting subclasses for the lock validator: + * + * The locking order between these classes is + * RENAME -> DENTRY_OPS -> DATA_WRITE -> DATA_NEW + * -> DATA_TRUNC -> NODE_WRITE -> NODE_NEW -> NODE_TRUNC + */ +enum lock_type { + RENAME, /* for renaming operations */ + DENTRY_OPS, /* for directory operations */ + DATA_WRITE, /* for data write */ + DATA_NEW, /* for data allocation */ + DATA_TRUNC, /* for data truncate */ + NODE_NEW, /* for node allocation */ + NODE_TRUNC, /* for node truncate */ + NODE_WRITE, /* for node write */ + NR_LOCK_TYPE, +}; + +/* + * The below are the page types of bios used in submti_bio(). + * The available types are: + * DATA User data pages. It operates as async mode. + * NODE Node pages. It operates as async mode. + * META FS metadata pages such as SIT, NAT, CP. + * NR_PAGE_TYPE The number of page types. + * META_FLUSH Make sure the previous pages are written + * with waiting the bio's completion + * ... Only can be used with META. + */ +enum page_type { + DATA, + NODE, + META, + NR_PAGE_TYPE, + META_FLUSH, +}; + +struct f2fs_sb_info { + struct super_block *sb; /* pointer to VFS super block */ + struct buffer_head *raw_super_buf; /* buffer head of raw sb */ + struct f2fs_super_block *raw_super; /* raw super block pointer */ + int s_dirty; /* dirty flag for checkpoint */ + + /* for node-related operations */ + struct f2fs_nm_info *nm_info; /* node manager */ + struct inode *node_inode; /* cache node blocks */ + + /* for segment-related operations */ + struct f2fs_sm_info *sm_info; /* segment manager */ + struct bio *bio[NR_PAGE_TYPE]; /* bios to merge */ + sector_t last_block_in_bio[NR_PAGE_TYPE]; /* last block number */ + struct rw_semaphore bio_sem; /* IO semaphore */ + + /* for checkpoint */ + struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ + struct inode *meta_inode; /* cache meta blocks */ + struct mutex cp_mutex; /* for checkpoint procedure */ + struct mutex fs_lock[NR_LOCK_TYPE]; /* for blocking FS operations */ + struct mutex write_inode; /* mutex for write inode */ + struct mutex writepages; /* mutex for writepages() */ + int por_doing; /* recovery is doing or not */ + + /* for orphan inode management */ + struct list_head orphan_inode_list; /* orphan inode list */ + struct mutex orphan_inode_mutex; /* for orphan inode list */ + unsigned int n_orphans; /* # of orphan inodes */ + + /* for directory inode management */ + struct list_head dir_inode_list; /* dir inode list */ + spinlock_t dir_inode_lock; /* for dir inode list lock */ + unsigned int n_dirty_dirs; /* # of dir inodes */ + + /* basic file system units */ + unsigned int log_sectors_per_block; /* log2 sectors per block */ + unsigned int log_blocksize; /* log2 block size */ + unsigned int blocksize; /* block size */ + unsigned int root_ino_num; /* root inode number*/ + unsigned int node_ino_num; /* node inode number*/ + unsigned int meta_ino_num; /* meta inode number*/ + unsigned int log_blocks_per_seg; /* log2 blocks per segment */ + unsigned int blocks_per_seg; /* blocks per segment */ + unsigned int segs_per_sec; /* segments per section */ + unsigned int secs_per_zone; /* sections per zone */ + unsigned int total_sections; /* total section count */ + unsigned int total_node_count; /* total node block count */ + unsigned int total_valid_node_count; /* valid node block count */ + unsigned int total_valid_inode_count; /* valid inode count */ + int active_logs; /* # of active logs */ + + block_t user_block_count; /* # of user blocks */ + block_t total_valid_block_count; /* # of valid blocks */ + block_t alloc_valid_block_count; /* # of allocated blocks */ + block_t last_valid_block_count; /* for recovery */ + u32 s_next_generation; /* for NFS support */ + atomic_t nr_pages[NR_COUNT_TYPE]; /* # of pages, see count_type */ + + struct f2fs_mount_info mount_opt; /* mount options */ + + /* for cleaning operations */ + struct mutex gc_mutex; /* mutex for GC */ + struct f2fs_gc_kthread *gc_thread; /* GC thread */ + + /* + * for stat information. + * one is for the LFS mode, and the other is for the SSR mode. + */ + struct f2fs_stat_info *stat_info; /* FS status information */ + unsigned int segment_count[2]; /* # of allocated segments */ + unsigned int block_count[2]; /* # of allocated blocks */ + unsigned int last_victim[2]; /* last victim segment # */ + int total_hit_ext, read_hit_ext; /* extent cache hit ratio */ + int bg_gc; /* background gc calls */ + spinlock_t stat_lock; /* lock for stat operations */ +}; + +/* + * Inline functions + */ +static inline struct f2fs_inode_info *F2FS_I(struct inode *inode) +{ + return container_of(inode, struct f2fs_inode_info, vfs_inode); +} + +static inline struct f2fs_sb_info *F2FS_SB(struct super_block *sb) +{ + return sb->s_fs_info; +} + +static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi) +{ + return (struct f2fs_super_block *)(sbi->raw_super); +} + +static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi) +{ + return (struct f2fs_checkpoint *)(sbi->ckpt); +} + +static inline struct f2fs_nm_info *NM_I(struct f2fs_sb_info *sbi) +{ + return (struct f2fs_nm_info *)(sbi->nm_info); +} + +static inline struct f2fs_sm_info *SM_I(struct f2fs_sb_info *sbi) +{ + return (struct f2fs_sm_info *)(sbi->sm_info); +} + +static inline struct sit_info *SIT_I(struct f2fs_sb_info *sbi) +{ + return (struct sit_info *)(SM_I(sbi)->sit_info); +} + +static inline struct free_segmap_info *FREE_I(struct f2fs_sb_info *sbi) +{ + return (struct free_segmap_info *)(SM_I(sbi)->free_info); +} + +static inline struct dirty_seglist_info *DIRTY_I(struct f2fs_sb_info *sbi) +{ + return (struct dirty_seglist_info *)(SM_I(sbi)->dirty_info); +} + +static inline void F2FS_SET_SB_DIRT(struct f2fs_sb_info *sbi) +{ + sbi->s_dirty = 1; +} + +static inline void F2FS_RESET_SB_DIRT(struct f2fs_sb_info *sbi) +{ + sbi->s_dirty = 0; +} + +static inline bool is_set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) +{ + unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); + return ckpt_flags & f; +} + +static inline void set_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) +{ + unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); + ckpt_flags |= f; + cp->ckpt_flags = cpu_to_le32(ckpt_flags); +} + +static inline void clear_ckpt_flags(struct f2fs_checkpoint *cp, unsigned int f) +{ + unsigned int ckpt_flags = le32_to_cpu(cp->ckpt_flags); + ckpt_flags &= (~f); + cp->ckpt_flags = cpu_to_le32(ckpt_flags); +} + +static inline void mutex_lock_op(struct f2fs_sb_info *sbi, enum lock_type t) +{ + mutex_lock_nested(&sbi->fs_lock[t], t); +} + +static inline void mutex_unlock_op(struct f2fs_sb_info *sbi, enum lock_type t) +{ + mutex_unlock(&sbi->fs_lock[t]); +} + +/* + * Check whether the given nid is within node id range. + */ +static inline void check_nid_range(struct f2fs_sb_info *sbi, nid_t nid) +{ + BUG_ON((nid >= NM_I(sbi)->max_nid)); +} + +#define F2FS_DEFAULT_ALLOCATED_BLOCKS 1 + +/* + * Check whether the inode has blocks or not + */ +static inline int F2FS_HAS_BLOCKS(struct inode *inode) +{ + if (F2FS_I(inode)->i_xattr_nid) + return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS + 1); + else + return (inode->i_blocks > F2FS_DEFAULT_ALLOCATED_BLOCKS); +} + +static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, + struct inode *inode, blkcnt_t count) +{ + block_t valid_block_count; + + spin_lock(&sbi->stat_lock); + valid_block_count = + sbi->total_valid_block_count + (block_t)count; + if (valid_block_count > sbi->user_block_count) { + spin_unlock(&sbi->stat_lock); + return false; + } + inode->i_blocks += count; + sbi->total_valid_block_count = valid_block_count; + sbi->alloc_valid_block_count += (block_t)count; + spin_unlock(&sbi->stat_lock); + return true; +} + +static inline int dec_valid_block_count(struct f2fs_sb_info *sbi, + struct inode *inode, + blkcnt_t count) +{ + spin_lock(&sbi->stat_lock); + BUG_ON(sbi->total_valid_block_count < (block_t) count); + BUG_ON(inode->i_blocks < count); + inode->i_blocks -= count; + sbi->total_valid_block_count -= (block_t)count; + spin_unlock(&sbi->stat_lock); + return 0; +} + +static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) +{ + atomic_inc(&sbi->nr_pages[count_type]); + F2FS_SET_SB_DIRT(sbi); +} + +static inline void inode_inc_dirty_dents(struct inode *inode) +{ + atomic_inc(&F2FS_I(inode)->dirty_dents); +} + +static inline void dec_page_count(struct f2fs_sb_info *sbi, int count_type) +{ + atomic_dec(&sbi->nr_pages[count_type]); +} + +static inline void inode_dec_dirty_dents(struct inode *inode) +{ + atomic_dec(&F2FS_I(inode)->dirty_dents); +} + +static inline int get_pages(struct f2fs_sb_info *sbi, int count_type) +{ + return atomic_read(&sbi->nr_pages[count_type]); +} + +static inline block_t valid_user_blocks(struct f2fs_sb_info *sbi) +{ + block_t ret; + spin_lock(&sbi->stat_lock); + ret = sbi->total_valid_block_count; + spin_unlock(&sbi->stat_lock); + return ret; +} + +static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + + /* return NAT or SIT bitmap */ + if (flag == NAT_BITMAP) + return le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); + else if (flag == SIT_BITMAP) + return le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); + + return 0; +} + +static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + int offset = (flag == NAT_BITMAP) ? + le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0; + return &ckpt->sit_nat_version_bitmap + offset; +} + +static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi) +{ + block_t start_addr; + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + unsigned long long ckpt_version = le64_to_cpu(ckpt->checkpoint_ver); + + start_addr = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_blkaddr); + + /* + * odd numbered checkpoint should at cp segment 0 + * and even segent must be at cp segment 1 + */ + if (!(ckpt_version & 1)) + start_addr += sbi->blocks_per_seg; + + return start_addr; +} + +static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi) +{ + return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); +} + +static inline bool inc_valid_node_count(struct f2fs_sb_info *sbi, + struct inode *inode, + unsigned int count) +{ + block_t valid_block_count; + unsigned int valid_node_count; + + spin_lock(&sbi->stat_lock); + + valid_block_count = sbi->total_valid_block_count + (block_t)count; + sbi->alloc_valid_block_count += (block_t)count; + valid_node_count = sbi->total_valid_node_count + count; + + if (valid_block_count > sbi->user_block_count) { + spin_unlock(&sbi->stat_lock); + return false; + } + + if (valid_node_count > sbi->total_node_count) { + spin_unlock(&sbi->stat_lock); + return false; + } + + if (inode) + inode->i_blocks += count; + sbi->total_valid_node_count = valid_node_count; + sbi->total_valid_block_count = valid_block_count; + spin_unlock(&sbi->stat_lock); + + return true; +} + +static inline void dec_valid_node_count(struct f2fs_sb_info *sbi, + struct inode *inode, + unsigned int count) +{ + spin_lock(&sbi->stat_lock); + + BUG_ON(sbi->total_valid_block_count < count); + BUG_ON(sbi->total_valid_node_count < count); + BUG_ON(inode->i_blocks < count); + + inode->i_blocks -= count; + sbi->total_valid_node_count -= count; + sbi->total_valid_block_count -= (block_t)count; + + spin_unlock(&sbi->stat_lock); +} + +static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi) +{ + unsigned int ret; + spin_lock(&sbi->stat_lock); + ret = sbi->total_valid_node_count; + spin_unlock(&sbi->stat_lock); + return ret; +} + +static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi) +{ + spin_lock(&sbi->stat_lock); + BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count); + sbi->total_valid_inode_count++; + spin_unlock(&sbi->stat_lock); +} + +static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi) +{ + spin_lock(&sbi->stat_lock); + BUG_ON(!sbi->total_valid_inode_count); + sbi->total_valid_inode_count--; + spin_unlock(&sbi->stat_lock); + return 0; +} + +static inline unsigned int valid_inode_count(struct f2fs_sb_info *sbi) +{ + unsigned int ret; + spin_lock(&sbi->stat_lock); + ret = sbi->total_valid_inode_count; + spin_unlock(&sbi->stat_lock); + return ret; +} + +static inline void f2fs_put_page(struct page *page, int unlock) +{ + if (!page || IS_ERR(page)) + return; + + if (unlock) { + BUG_ON(!PageLocked(page)); + unlock_page(page); + } + page_cache_release(page); +} + +static inline void f2fs_put_dnode(struct dnode_of_data *dn) +{ + if (dn->node_page) + f2fs_put_page(dn->node_page, 1); + if (dn->inode_page && dn->node_page != dn->inode_page) + f2fs_put_page(dn->inode_page, 0); + dn->node_page = NULL; + dn->inode_page = NULL; +} + +static inline struct kmem_cache *f2fs_kmem_cache_create(const char *name, + size_t size, void (*ctor)(void *)) +{ + return kmem_cache_create(name, size, 0, SLAB_RECLAIM_ACCOUNT, ctor); +} + +#define RAW_IS_INODE(p) ((p)->footer.nid == (p)->footer.ino) + +static inline bool IS_INODE(struct page *page) +{ + struct f2fs_node *p = (struct f2fs_node *)page_address(page); + return RAW_IS_INODE(p); +} + +static inline __le32 *blkaddr_in_node(struct f2fs_node *node) +{ + return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; +} + +static inline block_t datablock_addr(struct page *node_page, + unsigned int offset) +{ + struct f2fs_node *raw_node; + __le32 *addr_array; + raw_node = (struct f2fs_node *)page_address(node_page); + addr_array = blkaddr_in_node(raw_node); + return le32_to_cpu(addr_array[offset]); +} + +static inline int f2fs_test_bit(unsigned int nr, char *addr) +{ + int mask; + + addr += (nr >> 3); + mask = 1 << (7 - (nr & 0x07)); + return mask & *addr; +} + +static inline int f2fs_set_bit(unsigned int nr, char *addr) +{ + int mask; + int ret; + + addr += (nr >> 3); + mask = 1 << (7 - (nr & 0x07)); + ret = mask & *addr; + *addr |= mask; + return ret; +} + +static inline int f2fs_clear_bit(unsigned int nr, char *addr) +{ + int mask; + int ret; + + addr += (nr >> 3); + mask = 1 << (7 - (nr & 0x07)); + ret = mask & *addr; + *addr &= ~mask; + return ret; +} + +/* used for f2fs_inode_info->flags */ +enum { + FI_NEW_INODE, /* indicate newly allocated inode */ + FI_NEED_CP, /* need to do checkpoint during fsync */ + FI_INC_LINK, /* need to increment i_nlink */ + FI_ACL_MODE, /* indicate acl mode */ + FI_NO_ALLOC, /* should not allocate any blocks */ +}; + +static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) +{ + set_bit(flag, &fi->flags); +} + +static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) +{ + return test_bit(flag, &fi->flags); +} + +static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) +{ + clear_bit(flag, &fi->flags); +} + +static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) +{ + fi->i_acl_mode = mode; + set_inode_flag(fi, FI_ACL_MODE); +} + +static inline int cond_clear_inode_flag(struct f2fs_inode_info *fi, int flag) +{ + if (is_inode_flag_set(fi, FI_ACL_MODE)) { + clear_inode_flag(fi, FI_ACL_MODE); + return 1; + } + return 0; +} + +/* + * file.c + */ +int f2fs_sync_file(struct file *, loff_t, loff_t, int); +void truncate_data_blocks(struct dnode_of_data *); +void f2fs_truncate(struct inode *); +int f2fs_setattr(struct dentry *, struct iattr *); +int truncate_hole(struct inode *, pgoff_t, pgoff_t); +long f2fs_ioctl(struct file *, unsigned int, unsigned long); + +/* + * inode.c + */ +void f2fs_set_inode_flags(struct inode *); +struct inode *f2fs_iget_nowait(struct super_block *, unsigned long); +struct inode *f2fs_iget(struct super_block *, unsigned long); +void update_inode(struct inode *, struct page *); +int f2fs_write_inode(struct inode *, struct writeback_control *); +void f2fs_evict_inode(struct inode *); + +/* + * namei.c + */ +struct dentry *f2fs_get_parent(struct dentry *child); + +/* + * dir.c + */ +struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *, + struct page **); +struct f2fs_dir_entry *f2fs_parent_dir(struct inode *, struct page **); +ino_t f2fs_inode_by_name(struct inode *, struct qstr *); +void f2fs_set_link(struct inode *, struct f2fs_dir_entry *, + struct page *, struct inode *); +void init_dent_inode(struct dentry *, struct page *); +int f2fs_add_link(struct dentry *, struct inode *); +void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *); +int f2fs_make_empty(struct inode *, struct inode *); +bool f2fs_empty_dir(struct inode *); + +/* + * super.c + */ +int f2fs_sync_fs(struct super_block *, int); +extern __printf(3, 4) +void f2fs_msg(struct super_block *, const char *, const char *, ...); + +/* + * hash.c + */ +f2fs_hash_t f2fs_dentry_hash(const char *, size_t); + +/* + * node.c + */ +struct dnode_of_data; +struct node_info; + +int is_checkpointed_node(struct f2fs_sb_info *, nid_t); +void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *); +int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int); +int truncate_inode_blocks(struct inode *, pgoff_t); +int remove_inode_page(struct inode *); +int new_inode_page(struct inode *, struct dentry *); +struct page *new_node_page(struct dnode_of_data *, unsigned int); +void ra_node_page(struct f2fs_sb_info *, nid_t); +struct page *get_node_page(struct f2fs_sb_info *, pgoff_t); +struct page *get_node_page_ra(struct page *, int); +void sync_inode_page(struct dnode_of_data *); +int sync_node_pages(struct f2fs_sb_info *, nid_t, struct writeback_control *); +bool alloc_nid(struct f2fs_sb_info *, nid_t *); +void alloc_nid_done(struct f2fs_sb_info *, nid_t); +void alloc_nid_failed(struct f2fs_sb_info *, nid_t); +void recover_node_page(struct f2fs_sb_info *, struct page *, + struct f2fs_summary *, struct node_info *, block_t); +int recover_inode_page(struct f2fs_sb_info *, struct page *); +int restore_node_summary(struct f2fs_sb_info *, unsigned int, + struct f2fs_summary_block *); +void flush_nat_entries(struct f2fs_sb_info *); +int build_node_manager(struct f2fs_sb_info *); +void destroy_node_manager(struct f2fs_sb_info *); +int __init create_node_manager_caches(void); +void destroy_node_manager_caches(void); + +/* + * segment.c + */ +void f2fs_balance_fs(struct f2fs_sb_info *); +void invalidate_blocks(struct f2fs_sb_info *, block_t); +void locate_dirty_segment(struct f2fs_sb_info *, unsigned int); +void clear_prefree_segments(struct f2fs_sb_info *); +int npages_for_summary_flush(struct f2fs_sb_info *); +void allocate_new_segments(struct f2fs_sb_info *); +struct page *get_sum_page(struct f2fs_sb_info *, unsigned int); +struct bio *f2fs_bio_alloc(struct block_device *, int); +void f2fs_submit_bio(struct f2fs_sb_info *, enum page_type, bool sync); +int write_meta_page(struct f2fs_sb_info *, struct page *, + struct writeback_control *); +void write_node_page(struct f2fs_sb_info *, struct page *, unsigned int, + block_t, block_t *); +void write_data_page(struct inode *, struct page *, struct dnode_of_data*, + block_t, block_t *); +void rewrite_data_page(struct f2fs_sb_info *, struct page *, block_t); +void recover_data_page(struct f2fs_sb_info *, struct page *, + struct f2fs_summary *, block_t, block_t); +void rewrite_node_page(struct f2fs_sb_info *, struct page *, + struct f2fs_summary *, block_t, block_t); +void write_data_summaries(struct f2fs_sb_info *, block_t); +void write_node_summaries(struct f2fs_sb_info *, block_t); +int lookup_journal_in_cursum(struct f2fs_summary_block *, + int, unsigned int, int); +void flush_sit_entries(struct f2fs_sb_info *); +int build_segment_manager(struct f2fs_sb_info *); +void reset_victim_segmap(struct f2fs_sb_info *); +void destroy_segment_manager(struct f2fs_sb_info *); + +/* + * checkpoint.c + */ +struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t); +struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t); +long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long); +int check_orphan_space(struct f2fs_sb_info *); +void add_orphan_inode(struct f2fs_sb_info *, nid_t); +void remove_orphan_inode(struct f2fs_sb_info *, nid_t); +int recover_orphan_inodes(struct f2fs_sb_info *); +int get_valid_checkpoint(struct f2fs_sb_info *); +void set_dirty_dir_page(struct inode *, struct page *); +void remove_dirty_dir_inode(struct inode *); +void sync_dirty_dir_inodes(struct f2fs_sb_info *); +void block_operations(struct f2fs_sb_info *); +void write_checkpoint(struct f2fs_sb_info *, bool, bool); +void init_orphan_info(struct f2fs_sb_info *); +int __init create_checkpoint_caches(void); +void destroy_checkpoint_caches(void); + +/* + * data.c + */ +int reserve_new_block(struct dnode_of_data *); +void update_extent_cache(block_t, struct dnode_of_data *); +struct page *find_data_page(struct inode *, pgoff_t); +struct page *get_lock_data_page(struct inode *, pgoff_t); +struct page *get_new_data_page(struct inode *, pgoff_t, bool); +int f2fs_readpage(struct f2fs_sb_info *, struct page *, block_t, int); +int do_write_data_page(struct page *); + +/* + * gc.c + */ +int start_gc_thread(struct f2fs_sb_info *); +void stop_gc_thread(struct f2fs_sb_info *); +block_t start_bidx_of_node(unsigned int); +int f2fs_gc(struct f2fs_sb_info *); +void build_gc_manager(struct f2fs_sb_info *); +int __init create_gc_caches(void); +void destroy_gc_caches(void); + +/* + * recovery.c + */ +void recover_fsync_data(struct f2fs_sb_info *); +bool space_for_roll_forward(struct f2fs_sb_info *); + +/* + * debug.c + */ +#ifdef CONFIG_F2FS_STAT_FS +struct f2fs_stat_info { + struct list_head stat_list; + struct f2fs_sb_info *sbi; + struct mutex stat_lock; + int all_area_segs, sit_area_segs, nat_area_segs, ssa_area_segs; + int main_area_segs, main_area_sections, main_area_zones; + int hit_ext, total_ext; + int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta; + int nats, sits, fnids; + int total_count, utilization; + int bg_gc; + unsigned int valid_count, valid_node_count, valid_inode_count; + unsigned int bimodal, avg_vblocks; + int util_free, util_valid, util_invalid; + int rsvd_segs, overp_segs; + int dirty_count, node_pages, meta_pages; + int prefree_count, call_count; + int tot_segs, node_segs, data_segs, free_segs, free_secs; + int tot_blks, data_blks, node_blks; + int curseg[NR_CURSEG_TYPE]; + int cursec[NR_CURSEG_TYPE]; + int curzone[NR_CURSEG_TYPE]; + + unsigned int segment_count[2]; + unsigned int block_count[2]; + unsigned base_mem, cache_mem; +}; + +#define stat_inc_call_count(si) ((si)->call_count++) + +#define stat_inc_seg_count(sbi, type) \ + do { \ + struct f2fs_stat_info *si = sbi->stat_info; \ + (si)->tot_segs++; \ + if (type == SUM_TYPE_DATA) \ + si->data_segs++; \ + else \ + si->node_segs++; \ + } while (0) + +#define stat_inc_tot_blk_count(si, blks) \ + (si->tot_blks += (blks)) + +#define stat_inc_data_blk_count(sbi, blks) \ + do { \ + struct f2fs_stat_info *si = sbi->stat_info; \ + stat_inc_tot_blk_count(si, blks); \ + si->data_blks += (blks); \ + } while (0) + +#define stat_inc_node_blk_count(sbi, blks) \ + do { \ + struct f2fs_stat_info *si = sbi->stat_info; \ + stat_inc_tot_blk_count(si, blks); \ + si->node_blks += (blks); \ + } while (0) + +int f2fs_build_stats(struct f2fs_sb_info *); +void f2fs_destroy_stats(struct f2fs_sb_info *); +void __init f2fs_create_root_stats(void); +void f2fs_destroy_root_stats(void); +#else +#define stat_inc_call_count(si) +#define stat_inc_seg_count(si, type) +#define stat_inc_tot_blk_count(si, blks) +#define stat_inc_data_blk_count(si, blks) +#define stat_inc_node_blk_count(sbi, blks) + +static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; } +static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { } +static inline void __init f2fs_create_root_stats(void) { } +static inline void f2fs_destroy_root_stats(void) { } +#endif + +extern const struct file_operations f2fs_dir_operations; +extern const struct file_operations f2fs_file_operations; +extern const struct inode_operations f2fs_file_inode_operations; +extern const struct address_space_operations f2fs_dblock_aops; +extern const struct address_space_operations f2fs_node_aops; +extern const struct address_space_operations f2fs_meta_aops; +extern const struct inode_operations f2fs_dir_inode_operations; +extern const struct inode_operations f2fs_symlink_inode_operations; +extern const struct inode_operations f2fs_special_inode_operations; +#endif diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c new file mode 100644 index 00000000000..3191b52aafb --- /dev/null +++ b/fs/f2fs/file.c @@ -0,0 +1,646 @@ +/* + * fs/f2fs/file.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/stat.h> +#include <linux/buffer_head.h> +#include <linux/writeback.h> +#include <linux/falloc.h> +#include <linux/types.h> +#include <linux/uaccess.h> +#include <linux/mount.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" +#include "xattr.h" +#include "acl.h" + +static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, + struct vm_fault *vmf) +{ + struct page *page = vmf->page; + struct inode *inode = vma->vm_file->f_path.dentry->d_inode; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + block_t old_blk_addr; + struct dnode_of_data dn; + int err; + + f2fs_balance_fs(sbi); + + sb_start_pagefault(inode->i_sb); + + mutex_lock_op(sbi, DATA_NEW); + + /* block allocation */ + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, page->index, 0); + if (err) { + mutex_unlock_op(sbi, DATA_NEW); + goto out; + } + + old_blk_addr = dn.data_blkaddr; + + if (old_blk_addr == NULL_ADDR) { + err = reserve_new_block(&dn); + if (err) { + f2fs_put_dnode(&dn); + mutex_unlock_op(sbi, DATA_NEW); + goto out; + } + } + f2fs_put_dnode(&dn); + + mutex_unlock_op(sbi, DATA_NEW); + + lock_page(page); + if (page->mapping != inode->i_mapping || + page_offset(page) >= i_size_read(inode) || + !PageUptodate(page)) { + unlock_page(page); + err = -EFAULT; + goto out; + } + + /* + * check to see if the page is mapped already (no holes) + */ + if (PageMappedToDisk(page)) + goto out; + + /* fill the page */ + wait_on_page_writeback(page); + + /* page is wholly or partially inside EOF */ + if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { + unsigned offset; + offset = i_size_read(inode) & ~PAGE_CACHE_MASK; + zero_user_segment(page, offset, PAGE_CACHE_SIZE); + } + set_page_dirty(page); + SetPageUptodate(page); + + file_update_time(vma->vm_file); +out: + sb_end_pagefault(inode->i_sb); + return block_page_mkwrite_return(err); +} + +static const struct vm_operations_struct f2fs_file_vm_ops = { + .fault = filemap_fault, + .page_mkwrite = f2fs_vm_page_mkwrite, + .remap_pages = generic_file_remap_pages, +}; + +static int need_to_sync_dir(struct f2fs_sb_info *sbi, struct inode *inode) +{ + struct dentry *dentry; + nid_t pino; + + inode = igrab(inode); + dentry = d_find_any_alias(inode); + if (!dentry) { + iput(inode); + return 0; + } + pino = dentry->d_parent->d_inode->i_ino; + dput(dentry); + iput(inode); + return !is_checkpointed_node(sbi, pino); +} + +int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) +{ + struct inode *inode = file->f_mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + unsigned long long cur_version; + int ret = 0; + bool need_cp = false; + struct writeback_control wbc = { + .sync_mode = WB_SYNC_ALL, + .nr_to_write = LONG_MAX, + .for_reclaim = 0, + }; + + if (inode->i_sb->s_flags & MS_RDONLY) + return 0; + + ret = filemap_write_and_wait_range(inode->i_mapping, start, end); + if (ret) + return ret; + + /* guarantee free sections for fsync */ + f2fs_balance_fs(sbi); + + mutex_lock(&inode->i_mutex); + + if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) + goto out; + + mutex_lock(&sbi->cp_mutex); + cur_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver); + mutex_unlock(&sbi->cp_mutex); + + if (F2FS_I(inode)->data_version != cur_version && + !(inode->i_state & I_DIRTY)) + goto out; + F2FS_I(inode)->data_version--; + + if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) + need_cp = true; + if (is_inode_flag_set(F2FS_I(inode), FI_NEED_CP)) + need_cp = true; + if (!space_for_roll_forward(sbi)) + need_cp = true; + if (need_to_sync_dir(sbi, inode)) + need_cp = true; + + if (need_cp) { + /* all the dirty node pages should be flushed for POR */ + ret = f2fs_sync_fs(inode->i_sb, 1); + clear_inode_flag(F2FS_I(inode), FI_NEED_CP); + } else { + /* if there is no written node page, write its inode page */ + while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { + ret = f2fs_write_inode(inode, NULL); + if (ret) + goto out; + } + filemap_fdatawait_range(sbi->node_inode->i_mapping, + 0, LONG_MAX); + } +out: + mutex_unlock(&inode->i_mutex); + return ret; +} + +static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) +{ + file_accessed(file); + vma->vm_ops = &f2fs_file_vm_ops; + return 0; +} + +static int truncate_data_blocks_range(struct dnode_of_data *dn, int count) +{ + int nr_free = 0, ofs = dn->ofs_in_node; + struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + struct f2fs_node *raw_node; + __le32 *addr; + + raw_node = page_address(dn->node_page); + addr = blkaddr_in_node(raw_node) + ofs; + + for ( ; count > 0; count--, addr++, dn->ofs_in_node++) { + block_t blkaddr = le32_to_cpu(*addr); + if (blkaddr == NULL_ADDR) + continue; + + update_extent_cache(NULL_ADDR, dn); + invalidate_blocks(sbi, blkaddr); + dec_valid_block_count(sbi, dn->inode, 1); + nr_free++; + } + if (nr_free) { + set_page_dirty(dn->node_page); + sync_inode_page(dn); + } + dn->ofs_in_node = ofs; + return nr_free; +} + +void truncate_data_blocks(struct dnode_of_data *dn) +{ + truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); +} + +static void truncate_partial_data_page(struct inode *inode, u64 from) +{ + unsigned offset = from & (PAGE_CACHE_SIZE - 1); + struct page *page; + + if (!offset) + return; + + page = find_data_page(inode, from >> PAGE_CACHE_SHIFT); + if (IS_ERR(page)) + return; + + lock_page(page); + wait_on_page_writeback(page); + zero_user(page, offset, PAGE_CACHE_SIZE - offset); + set_page_dirty(page); + f2fs_put_page(page, 1); +} + +static int truncate_blocks(struct inode *inode, u64 from) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + unsigned int blocksize = inode->i_sb->s_blocksize; + struct dnode_of_data dn; + pgoff_t free_from; + int count = 0; + int err; + + free_from = (pgoff_t) + ((from + blocksize - 1) >> (sbi->log_blocksize)); + + mutex_lock_op(sbi, DATA_TRUNC); + + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, free_from, RDONLY_NODE); + if (err) { + if (err == -ENOENT) + goto free_next; + mutex_unlock_op(sbi, DATA_TRUNC); + return err; + } + + if (IS_INODE(dn.node_page)) + count = ADDRS_PER_INODE; + else + count = ADDRS_PER_BLOCK; + + count -= dn.ofs_in_node; + BUG_ON(count < 0); + if (dn.ofs_in_node || IS_INODE(dn.node_page)) { + truncate_data_blocks_range(&dn, count); + free_from += count; + } + + f2fs_put_dnode(&dn); +free_next: + err = truncate_inode_blocks(inode, free_from); + mutex_unlock_op(sbi, DATA_TRUNC); + + /* lastly zero out the first data page */ + truncate_partial_data_page(inode, from); + + return err; +} + +void f2fs_truncate(struct inode *inode) +{ + if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || + S_ISLNK(inode->i_mode))) + return; + + if (!truncate_blocks(inode, i_size_read(inode))) { + inode->i_mtime = inode->i_ctime = CURRENT_TIME; + mark_inode_dirty(inode); + } + + f2fs_balance_fs(F2FS_SB(inode->i_sb)); +} + +static int f2fs_getattr(struct vfsmount *mnt, + struct dentry *dentry, struct kstat *stat) +{ + struct inode *inode = dentry->d_inode; + generic_fillattr(inode, stat); + stat->blocks <<= 3; + return 0; +} + +#ifdef CONFIG_F2FS_FS_POSIX_ACL +static void __setattr_copy(struct inode *inode, const struct iattr *attr) +{ + struct f2fs_inode_info *fi = F2FS_I(inode); + unsigned int ia_valid = attr->ia_valid; + + if (ia_valid & ATTR_UID) + inode->i_uid = attr->ia_uid; + if (ia_valid & ATTR_GID) + inode->i_gid = attr->ia_gid; + if (ia_valid & ATTR_ATIME) + inode->i_atime = timespec_trunc(attr->ia_atime, + inode->i_sb->s_time_gran); + if (ia_valid & ATTR_MTIME) + inode->i_mtime = timespec_trunc(attr->ia_mtime, + inode->i_sb->s_time_gran); + if (ia_valid & ATTR_CTIME) + inode->i_ctime = timespec_trunc(attr->ia_ctime, + inode->i_sb->s_time_gran); + if (ia_valid & ATTR_MODE) { + umode_t mode = attr->ia_mode; + + if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) + mode &= ~S_ISGID; + set_acl_inode(fi, mode); + } +} +#else +#define __setattr_copy setattr_copy +#endif + +int f2fs_setattr(struct dentry *dentry, struct iattr *attr) +{ + struct inode *inode = dentry->d_inode; + struct f2fs_inode_info *fi = F2FS_I(inode); + int err; + + err = inode_change_ok(inode, attr); + if (err) + return err; + + if ((attr->ia_valid & ATTR_SIZE) && + attr->ia_size != i_size_read(inode)) { + truncate_setsize(inode, attr->ia_size); + f2fs_truncate(inode); + } + + __setattr_copy(inode, attr); + + if (attr->ia_valid & ATTR_MODE) { + err = f2fs_acl_chmod(inode); + if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { + inode->i_mode = fi->i_acl_mode; + clear_inode_flag(fi, FI_ACL_MODE); + } + } + + mark_inode_dirty(inode); + return err; +} + +const struct inode_operations f2fs_file_inode_operations = { + .getattr = f2fs_getattr, + .setattr = f2fs_setattr, + .get_acl = f2fs_get_acl, +#ifdef CONFIG_F2FS_FS_XATTR + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = f2fs_listxattr, + .removexattr = generic_removexattr, +#endif +}; + +static void fill_zero(struct inode *inode, pgoff_t index, + loff_t start, loff_t len) +{ + struct page *page; + + if (!len) + return; + + page = get_new_data_page(inode, index, false); + + if (!IS_ERR(page)) { + wait_on_page_writeback(page); + zero_user(page, start, len); + set_page_dirty(page); + f2fs_put_page(page, 1); + } +} + +int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) +{ + pgoff_t index; + int err; + + for (index = pg_start; index < pg_end; index++) { + struct dnode_of_data dn; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + + f2fs_balance_fs(sbi); + + mutex_lock_op(sbi, DATA_TRUNC); + set_new_dnode(&dn, inode, NULL, NULL, 0); + err = get_dnode_of_data(&dn, index, RDONLY_NODE); + if (err) { + mutex_unlock_op(sbi, DATA_TRUNC); + if (err == -ENOENT) + continue; + return err; + } + + if (dn.data_blkaddr != NULL_ADDR) + truncate_data_blocks_range(&dn, 1); + f2fs_put_dnode(&dn); + mutex_unlock_op(sbi, DATA_TRUNC); + } + return 0; +} + +static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode) +{ + pgoff_t pg_start, pg_end; + loff_t off_start, off_end; + int ret = 0; + + pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; + pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; + + off_start = offset & (PAGE_CACHE_SIZE - 1); + off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); + + if (pg_start == pg_end) { + fill_zero(inode, pg_start, off_start, + off_end - off_start); + } else { + if (off_start) + fill_zero(inode, pg_start++, off_start, + PAGE_CACHE_SIZE - off_start); + if (off_end) + fill_zero(inode, pg_end, 0, off_end); + + if (pg_start < pg_end) { + struct address_space *mapping = inode->i_mapping; + loff_t blk_start, blk_end; + + blk_start = pg_start << PAGE_CACHE_SHIFT; + blk_end = pg_end << PAGE_CACHE_SHIFT; + truncate_inode_pages_range(mapping, blk_start, + blk_end - 1); + ret = truncate_hole(inode, pg_start, pg_end); + } + } + + if (!(mode & FALLOC_FL_KEEP_SIZE) && + i_size_read(inode) <= (offset + len)) { + i_size_write(inode, offset); + mark_inode_dirty(inode); + } + + return ret; +} + +static int expand_inode_data(struct inode *inode, loff_t offset, + loff_t len, int mode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + pgoff_t index, pg_start, pg_end; + loff_t new_size = i_size_read(inode); + loff_t off_start, off_end; + int ret = 0; + + ret = inode_newsize_ok(inode, (len + offset)); + if (ret) + return ret; + + pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; + pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; + + off_start = offset & (PAGE_CACHE_SIZE - 1); + off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); + + for (index = pg_start; index <= pg_end; index++) { + struct dnode_of_data dn; + + mutex_lock_op(sbi, DATA_NEW); + + set_new_dnode(&dn, inode, NULL, NULL, 0); + ret = get_dnode_of_data(&dn, index, 0); + if (ret) { + mutex_unlock_op(sbi, DATA_NEW); + break; + } + + if (dn.data_blkaddr == NULL_ADDR) { + ret = reserve_new_block(&dn); + if (ret) { + f2fs_put_dnode(&dn); + mutex_unlock_op(sbi, DATA_NEW); + break; + } + } + f2fs_put_dnode(&dn); + + mutex_unlock_op(sbi, DATA_NEW); + + if (pg_start == pg_end) + new_size = offset + len; + else if (index == pg_start && off_start) + new_size = (index + 1) << PAGE_CACHE_SHIFT; + else if (index == pg_end) + new_size = (index << PAGE_CACHE_SHIFT) + off_end; + else + new_size += PAGE_CACHE_SIZE; + } + + if (!(mode & FALLOC_FL_KEEP_SIZE) && + i_size_read(inode) < new_size) { + i_size_write(inode, new_size); + mark_inode_dirty(inode); + } + + return ret; +} + +static long f2fs_fallocate(struct file *file, int mode, + loff_t offset, loff_t len) +{ + struct inode *inode = file->f_path.dentry->d_inode; + long ret; + + if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) + return -EOPNOTSUPP; + + if (mode & FALLOC_FL_PUNCH_HOLE) + ret = punch_hole(inode, offset, len, mode); + else + ret = expand_inode_data(inode, offset, len, mode); + + if (!ret) { + inode->i_mtime = inode->i_ctime = CURRENT_TIME; + mark_inode_dirty(inode); + } + return ret; +} + +#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) +#define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) + +static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) +{ + if (S_ISDIR(mode)) + return flags; + else if (S_ISREG(mode)) + return flags & F2FS_REG_FLMASK; + else + return flags & F2FS_OTHER_FLMASK; +} + +long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + struct inode *inode = filp->f_dentry->d_inode; + struct f2fs_inode_info *fi = F2FS_I(inode); + unsigned int flags; + int ret; + + switch (cmd) { + case FS_IOC_GETFLAGS: + flags = fi->i_flags & FS_FL_USER_VISIBLE; + return put_user(flags, (int __user *) arg); + case FS_IOC_SETFLAGS: + { + unsigned int oldflags; + + ret = mnt_want_write(filp->f_path.mnt); + if (ret) + return ret; + + if (!inode_owner_or_capable(inode)) { + ret = -EACCES; + goto out; + } + + if (get_user(flags, (int __user *) arg)) { + ret = -EFAULT; + goto out; + } + + flags = f2fs_mask_flags(inode->i_mode, flags); + + mutex_lock(&inode->i_mutex); + + oldflags = fi->i_flags; + + if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { + if (!capable(CAP_LINUX_IMMUTABLE)) { + mutex_unlock(&inode->i_mutex); + ret = -EPERM; + goto out; + } + } + + flags = flags & FS_FL_USER_MODIFIABLE; + flags |= oldflags & ~FS_FL_USER_MODIFIABLE; + fi->i_flags = flags; + mutex_unlock(&inode->i_mutex); + + f2fs_set_inode_flags(inode); + inode->i_ctime = CURRENT_TIME; + mark_inode_dirty(inode); +out: + mnt_drop_write(filp->f_path.mnt); + return ret; + } + default: + return -ENOTTY; + } +} + +const struct file_operations f2fs_file_operations = { + .llseek = generic_file_llseek, + .read = do_sync_read, + .write = do_sync_write, + .aio_read = generic_file_aio_read, + .aio_write = generic_file_aio_write, + .open = generic_file_open, + .mmap = f2fs_file_mmap, + .fsync = f2fs_sync_file, + .fallocate = f2fs_fallocate, + .unlocked_ioctl = f2fs_ioctl, + .splice_read = generic_file_splice_read, + .splice_write = generic_file_splice_write, +}; diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c new file mode 100644 index 00000000000..c386910dacc --- /dev/null +++ b/fs/f2fs/gc.c @@ -0,0 +1,716 @@ +/* + * fs/f2fs/gc.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/module.h> +#include <linux/backing-dev.h> +#include <linux/proc_fs.h> +#include <linux/init.h> +#include <linux/f2fs_fs.h> +#include <linux/kthread.h> +#include <linux/delay.h> +#include <linux/freezer.h> +#include <linux/blkdev.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" +#include "gc.h" + +static struct kmem_cache *winode_slab; + +static int gc_thread_func(void *data) +{ + struct f2fs_sb_info *sbi = data; + wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head; + long wait_ms; + + wait_ms = GC_THREAD_MIN_SLEEP_TIME; + + do { + if (try_to_freeze()) + continue; + else + wait_event_interruptible_timeout(*wq, + kthread_should_stop(), + msecs_to_jiffies(wait_ms)); + if (kthread_should_stop()) + break; + + f2fs_balance_fs(sbi); + + if (!test_opt(sbi, BG_GC)) + continue; + + /* + * [GC triggering condition] + * 0. GC is not conducted currently. + * 1. There are enough dirty segments. + * 2. IO subsystem is idle by checking the # of writeback pages. + * 3. IO subsystem is idle by checking the # of requests in + * bdev's request list. + * + * Note) We have to avoid triggering GCs too much frequently. + * Because it is possible that some segments can be + * invalidated soon after by user update or deletion. + * So, I'd like to wait some time to collect dirty segments. + */ + if (!mutex_trylock(&sbi->gc_mutex)) + continue; + + if (!is_idle(sbi)) { + wait_ms = increase_sleep_time(wait_ms); + mutex_unlock(&sbi->gc_mutex); + continue; + } + + if (has_enough_invalid_blocks(sbi)) + wait_ms = decrease_sleep_time(wait_ms); + else + wait_ms = increase_sleep_time(wait_ms); + + sbi->bg_gc++; + + if (f2fs_gc(sbi) == GC_NONE) + wait_ms = GC_THREAD_NOGC_SLEEP_TIME; + else if (wait_ms == GC_THREAD_NOGC_SLEEP_TIME) + wait_ms = GC_THREAD_MAX_SLEEP_TIME; + + } while (!kthread_should_stop()); + return 0; +} + +int start_gc_thread(struct f2fs_sb_info *sbi) +{ + struct f2fs_gc_kthread *gc_th; + + gc_th = kmalloc(sizeof(struct f2fs_gc_kthread), GFP_KERNEL); + if (!gc_th) + return -ENOMEM; + + sbi->gc_thread = gc_th; + init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head); + sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi, + GC_THREAD_NAME); + if (IS_ERR(gc_th->f2fs_gc_task)) { + kfree(gc_th); + return -ENOMEM; + } + return 0; +} + +void stop_gc_thread(struct f2fs_sb_info *sbi) +{ + struct f2fs_gc_kthread *gc_th = sbi->gc_thread; + if (!gc_th) + return; + kthread_stop(gc_th->f2fs_gc_task); + kfree(gc_th); + sbi->gc_thread = NULL; +} + +static int select_gc_type(int gc_type) +{ + return (gc_type == BG_GC) ? GC_CB : GC_GREEDY; +} + +static void select_policy(struct f2fs_sb_info *sbi, int gc_type, + int type, struct victim_sel_policy *p) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + + if (p->alloc_mode) { + p->gc_mode = GC_GREEDY; + p->dirty_segmap = dirty_i->dirty_segmap[type]; + p->ofs_unit = 1; + } else { + p->gc_mode = select_gc_type(gc_type); + p->dirty_segmap = dirty_i->dirty_segmap[DIRTY]; + p->ofs_unit = sbi->segs_per_sec; + } + p->offset = sbi->last_victim[p->gc_mode]; +} + +static unsigned int get_max_cost(struct f2fs_sb_info *sbi, + struct victim_sel_policy *p) +{ + if (p->gc_mode == GC_GREEDY) + return (1 << sbi->log_blocks_per_seg) * p->ofs_unit; + else if (p->gc_mode == GC_CB) + return UINT_MAX; + else /* No other gc_mode */ + return 0; +} + +static unsigned int check_bg_victims(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + unsigned int segno; + + /* + * If the gc_type is FG_GC, we can select victim segments + * selected by background GC before. + * Those segments guarantee they have small valid blocks. + */ + segno = find_next_bit(dirty_i->victim_segmap[BG_GC], + TOTAL_SEGS(sbi), 0); + if (segno < TOTAL_SEGS(sbi)) { + clear_bit(segno, dirty_i->victim_segmap[BG_GC]); + return segno; + } + return NULL_SEGNO; +} + +static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno) +{ + struct sit_info *sit_i = SIT_I(sbi); + unsigned int secno = GET_SECNO(sbi, segno); + unsigned int start = secno * sbi->segs_per_sec; + unsigned long long mtime = 0; + unsigned int vblocks; + unsigned char age = 0; + unsigned char u; + unsigned int i; + + for (i = 0; i < sbi->segs_per_sec; i++) + mtime += get_seg_entry(sbi, start + i)->mtime; + vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec); + + mtime = div_u64(mtime, sbi->segs_per_sec); + vblocks = div_u64(vblocks, sbi->segs_per_sec); + + u = (vblocks * 100) >> sbi->log_blocks_per_seg; + + /* Handle if the system time is changed by user */ + if (mtime < sit_i->min_mtime) + sit_i->min_mtime = mtime; + if (mtime > sit_i->max_mtime) + sit_i->max_mtime = mtime; + if (sit_i->max_mtime != sit_i->min_mtime) + age = 100 - div64_u64(100 * (mtime - sit_i->min_mtime), + sit_i->max_mtime - sit_i->min_mtime); + + return UINT_MAX - ((100 * (100 - u) * age) / (100 + u)); +} + +static unsigned int get_gc_cost(struct f2fs_sb_info *sbi, unsigned int segno, + struct victim_sel_policy *p) +{ + if (p->alloc_mode == SSR) + return get_seg_entry(sbi, segno)->ckpt_valid_blocks; + + /* alloc_mode == LFS */ + if (p->gc_mode == GC_GREEDY) + return get_valid_blocks(sbi, segno, sbi->segs_per_sec); + else + return get_cb_cost(sbi, segno); +} + +/* + * This function is called from two pathes. + * One is garbage collection and the other is SSR segment selection. + * When it is called during GC, it just gets a victim segment + * and it does not remove it from dirty seglist. + * When it is called from SSR segment selection, it finds a segment + * which has minimum valid blocks and removes it from dirty seglist. + */ +static int get_victim_by_default(struct f2fs_sb_info *sbi, + unsigned int *result, int gc_type, int type, char alloc_mode) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + struct victim_sel_policy p; + unsigned int segno; + int nsearched = 0; + + p.alloc_mode = alloc_mode; + select_policy(sbi, gc_type, type, &p); + + p.min_segno = NULL_SEGNO; + p.min_cost = get_max_cost(sbi, &p); + + mutex_lock(&dirty_i->seglist_lock); + + if (p.alloc_mode == LFS && gc_type == FG_GC) { + p.min_segno = check_bg_victims(sbi); + if (p.min_segno != NULL_SEGNO) + goto got_it; + } + + while (1) { + unsigned long cost; + + segno = find_next_bit(p.dirty_segmap, + TOTAL_SEGS(sbi), p.offset); + if (segno >= TOTAL_SEGS(sbi)) { + if (sbi->last_victim[p.gc_mode]) { + sbi->last_victim[p.gc_mode] = 0; + p.offset = 0; + continue; + } + break; + } + p.offset = ((segno / p.ofs_unit) * p.ofs_unit) + p.ofs_unit; + + if (test_bit(segno, dirty_i->victim_segmap[FG_GC])) + continue; + if (gc_type == BG_GC && + test_bit(segno, dirty_i->victim_segmap[BG_GC])) + continue; + if (IS_CURSEC(sbi, GET_SECNO(sbi, segno))) + continue; + + cost = get_gc_cost(sbi, segno, &p); + + if (p.min_cost > cost) { + p.min_segno = segno; + p.min_cost = cost; + } + + if (cost == get_max_cost(sbi, &p)) + continue; + + if (nsearched++ >= MAX_VICTIM_SEARCH) { + sbi->last_victim[p.gc_mode] = segno; + break; + } + } +got_it: + if (p.min_segno != NULL_SEGNO) { + *result = (p.min_segno / p.ofs_unit) * p.ofs_unit; + if (p.alloc_mode == LFS) { + int i; + for (i = 0; i < p.ofs_unit; i++) + set_bit(*result + i, + dirty_i->victim_segmap[gc_type]); + } + } + mutex_unlock(&dirty_i->seglist_lock); + + return (p.min_segno == NULL_SEGNO) ? 0 : 1; +} + +static const struct victim_selection default_v_ops = { + .get_victim = get_victim_by_default, +}; + +static struct inode *find_gc_inode(nid_t ino, struct list_head *ilist) +{ + struct list_head *this; + struct inode_entry *ie; + + list_for_each(this, ilist) { + ie = list_entry(this, struct inode_entry, list); + if (ie->inode->i_ino == ino) + return ie->inode; + } + return NULL; +} + +static void add_gc_inode(struct inode *inode, struct list_head *ilist) +{ + struct list_head *this; + struct inode_entry *new_ie, *ie; + + list_for_each(this, ilist) { + ie = list_entry(this, struct inode_entry, list); + if (ie->inode == inode) { + iput(inode); + return; + } + } +repeat: + new_ie = kmem_cache_alloc(winode_slab, GFP_NOFS); + if (!new_ie) { + cond_resched(); + goto repeat; + } + new_ie->inode = inode; + list_add_tail(&new_ie->list, ilist); +} + +static void put_gc_inode(struct list_head *ilist) +{ + struct inode_entry *ie, *next_ie; + list_for_each_entry_safe(ie, next_ie, ilist, list) { + iput(ie->inode); + list_del(&ie->list); + kmem_cache_free(winode_slab, ie); + } +} + +static int check_valid_map(struct f2fs_sb_info *sbi, + unsigned int segno, int offset) +{ + struct sit_info *sit_i = SIT_I(sbi); + struct seg_entry *sentry; + int ret; + + mutex_lock(&sit_i->sentry_lock); + sentry = get_seg_entry(sbi, segno); + ret = f2fs_test_bit(offset, sentry->cur_valid_map); + mutex_unlock(&sit_i->sentry_lock); + return ret ? GC_OK : GC_NEXT; +} + +/* + * This function compares node address got in summary with that in NAT. + * On validity, copy that node with cold status, otherwise (invalid node) + * ignore that. + */ +static int gc_node_segment(struct f2fs_sb_info *sbi, + struct f2fs_summary *sum, unsigned int segno, int gc_type) +{ + bool initial = true; + struct f2fs_summary *entry; + int off; + +next_step: + entry = sum; + for (off = 0; off < sbi->blocks_per_seg; off++, entry++) { + nid_t nid = le32_to_cpu(entry->nid); + struct page *node_page; + int err; + + /* + * It makes sure that free segments are able to write + * all the dirty node pages before CP after this CP. + * So let's check the space of dirty node pages. + */ + if (should_do_checkpoint(sbi)) { + mutex_lock(&sbi->cp_mutex); + block_operations(sbi); + return GC_BLOCKED; + } + + err = check_valid_map(sbi, segno, off); + if (err == GC_NEXT) + continue; + + if (initial) { + ra_node_page(sbi, nid); + continue; + } + node_page = get_node_page(sbi, nid); + if (IS_ERR(node_page)) + continue; + + /* set page dirty and write it */ + if (!PageWriteback(node_page)) + set_page_dirty(node_page); + f2fs_put_page(node_page, 1); + stat_inc_node_blk_count(sbi, 1); + } + if (initial) { + initial = false; + goto next_step; + } + + if (gc_type == FG_GC) { + struct writeback_control wbc = { + .sync_mode = WB_SYNC_ALL, + .nr_to_write = LONG_MAX, + .for_reclaim = 0, + }; + sync_node_pages(sbi, 0, &wbc); + } + return GC_DONE; +} + +/* + * Calculate start block index indicating the given node offset. + * Be careful, caller should give this node offset only indicating direct node + * blocks. If any node offsets, which point the other types of node blocks such + * as indirect or double indirect node blocks, are given, it must be a caller's + * bug. + */ +block_t start_bidx_of_node(unsigned int node_ofs) +{ + unsigned int indirect_blks = 2 * NIDS_PER_BLOCK + 4; + unsigned int bidx; + + if (node_ofs == 0) + return 0; + + if (node_ofs <= 2) { + bidx = node_ofs - 1; + } else if (node_ofs <= indirect_blks) { + int dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1); + bidx = node_ofs - 2 - dec; + } else { + int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1); + bidx = node_ofs - 5 - dec; + } + return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE; +} + +static int check_dnode(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, + struct node_info *dni, block_t blkaddr, unsigned int *nofs) +{ + struct page *node_page; + nid_t nid; + unsigned int ofs_in_node; + block_t source_blkaddr; + + nid = le32_to_cpu(sum->nid); + ofs_in_node = le16_to_cpu(sum->ofs_in_node); + + node_page = get_node_page(sbi, nid); + if (IS_ERR(node_page)) + return GC_NEXT; + + get_node_info(sbi, nid, dni); + + if (sum->version != dni->version) { + f2fs_put_page(node_page, 1); + return GC_NEXT; + } + + *nofs = ofs_of_node(node_page); + source_blkaddr = datablock_addr(node_page, ofs_in_node); + f2fs_put_page(node_page, 1); + + if (source_blkaddr != blkaddr) + return GC_NEXT; + return GC_OK; +} + +static void move_data_page(struct inode *inode, struct page *page, int gc_type) +{ + if (page->mapping != inode->i_mapping) + goto out; + + if (inode != page->mapping->host) + goto out; + + if (PageWriteback(page)) + goto out; + + if (gc_type == BG_GC) { + set_page_dirty(page); + set_cold_data(page); + } else { + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + mutex_lock_op(sbi, DATA_WRITE); + if (clear_page_dirty_for_io(page) && + S_ISDIR(inode->i_mode)) { + dec_page_count(sbi, F2FS_DIRTY_DENTS); + inode_dec_dirty_dents(inode); + } + set_cold_data(page); + do_write_data_page(page); + mutex_unlock_op(sbi, DATA_WRITE); + clear_cold_data(page); + } +out: + f2fs_put_page(page, 1); +} + +/* + * This function tries to get parent node of victim data block, and identifies + * data block validity. If the block is valid, copy that with cold status and + * modify parent node. + * If the parent node is not valid or the data block address is different, + * the victim data block is ignored. + */ +static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, + struct list_head *ilist, unsigned int segno, int gc_type) +{ + struct super_block *sb = sbi->sb; + struct f2fs_summary *entry; + block_t start_addr; + int err, off; + int phase = 0; + + start_addr = START_BLOCK(sbi, segno); + +next_step: + entry = sum; + for (off = 0; off < sbi->blocks_per_seg; off++, entry++) { + struct page *data_page; + struct inode *inode; + struct node_info dni; /* dnode info for the data */ + unsigned int ofs_in_node, nofs; + block_t start_bidx; + + /* + * It makes sure that free segments are able to write + * all the dirty node pages before CP after this CP. + * So let's check the space of dirty node pages. + */ + if (should_do_checkpoint(sbi)) { + mutex_lock(&sbi->cp_mutex); + block_operations(sbi); + err = GC_BLOCKED; + goto stop; + } + + err = check_valid_map(sbi, segno, off); + if (err == GC_NEXT) + continue; + + if (phase == 0) { + ra_node_page(sbi, le32_to_cpu(entry->nid)); + continue; + } + + /* Get an inode by ino with checking validity */ + err = check_dnode(sbi, entry, &dni, start_addr + off, &nofs); + if (err == GC_NEXT) + continue; + + if (phase == 1) { + ra_node_page(sbi, dni.ino); + continue; + } + + start_bidx = start_bidx_of_node(nofs); + ofs_in_node = le16_to_cpu(entry->ofs_in_node); + + if (phase == 2) { + inode = f2fs_iget_nowait(sb, dni.ino); + if (IS_ERR(inode)) + continue; + + data_page = find_data_page(inode, + start_bidx + ofs_in_node); + if (IS_ERR(data_page)) + goto next_iput; + + f2fs_put_page(data_page, 0); + add_gc_inode(inode, ilist); + } else { + inode = find_gc_inode(dni.ino, ilist); + if (inode) { + data_page = get_lock_data_page(inode, + start_bidx + ofs_in_node); + if (IS_ERR(data_page)) + continue; + move_data_page(inode, data_page, gc_type); + stat_inc_data_blk_count(sbi, 1); + } + } + continue; +next_iput: + iput(inode); + } + if (++phase < 4) + goto next_step; + err = GC_DONE; +stop: + if (gc_type == FG_GC) + f2fs_submit_bio(sbi, DATA, true); + return err; +} + +static int __get_victim(struct f2fs_sb_info *sbi, unsigned int *victim, + int gc_type, int type) +{ + struct sit_info *sit_i = SIT_I(sbi); + int ret; + mutex_lock(&sit_i->sentry_lock); + ret = DIRTY_I(sbi)->v_ops->get_victim(sbi, victim, gc_type, type, LFS); + mutex_unlock(&sit_i->sentry_lock); + return ret; +} + +static int do_garbage_collect(struct f2fs_sb_info *sbi, unsigned int segno, + struct list_head *ilist, int gc_type) +{ + struct page *sum_page; + struct f2fs_summary_block *sum; + int ret = GC_DONE; + + /* read segment summary of victim */ + sum_page = get_sum_page(sbi, segno); + if (IS_ERR(sum_page)) + return GC_ERROR; + + /* + * CP needs to lock sum_page. In this time, we don't need + * to lock this page, because this summary page is not gone anywhere. + * Also, this page is not gonna be updated before GC is done. + */ + unlock_page(sum_page); + sum = page_address(sum_page); + + switch (GET_SUM_TYPE((&sum->footer))) { + case SUM_TYPE_NODE: + ret = gc_node_segment(sbi, sum->entries, segno, gc_type); + break; + case SUM_TYPE_DATA: + ret = gc_data_segment(sbi, sum->entries, ilist, segno, gc_type); + break; + } + stat_inc_seg_count(sbi, GET_SUM_TYPE((&sum->footer))); + stat_inc_call_count(sbi->stat_info); + + f2fs_put_page(sum_page, 0); + return ret; +} + +int f2fs_gc(struct f2fs_sb_info *sbi) +{ + struct list_head ilist; + unsigned int segno, i; + int gc_type = BG_GC; + int gc_status = GC_NONE; + + INIT_LIST_HEAD(&ilist); +gc_more: + if (!(sbi->sb->s_flags & MS_ACTIVE)) + goto stop; + + if (has_not_enough_free_secs(sbi)) + gc_type = FG_GC; + + if (!__get_victim(sbi, &segno, gc_type, NO_CHECK_TYPE)) + goto stop; + + for (i = 0; i < sbi->segs_per_sec; i++) { + /* + * do_garbage_collect will give us three gc_status: + * GC_ERROR, GC_DONE, and GC_BLOCKED. + * If GC is finished uncleanly, we have to return + * the victim to dirty segment list. + */ + gc_status = do_garbage_collect(sbi, segno + i, &ilist, gc_type); + if (gc_status != GC_DONE) + break; + } + if (has_not_enough_free_secs(sbi)) { + write_checkpoint(sbi, (gc_status == GC_BLOCKED), false); + if (has_not_enough_free_secs(sbi)) + goto gc_more; + } +stop: + mutex_unlock(&sbi->gc_mutex); + + put_gc_inode(&ilist); + return gc_status; +} + +void build_gc_manager(struct f2fs_sb_info *sbi) +{ + DIRTY_I(sbi)->v_ops = &default_v_ops; +} + +int __init create_gc_caches(void) +{ + winode_slab = f2fs_kmem_cache_create("f2fs_gc_inodes", + sizeof(struct inode_entry), NULL); + if (!winode_slab) + return -ENOMEM; + return 0; +} + +void destroy_gc_caches(void) +{ + kmem_cache_destroy(winode_slab); +} diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h new file mode 100644 index 00000000000..b026d9354cc --- /dev/null +++ b/fs/f2fs/gc.h @@ -0,0 +1,117 @@ +/* + * fs/f2fs/gc.h + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#define GC_THREAD_NAME "f2fs_gc_task" +#define GC_THREAD_MIN_WB_PAGES 1 /* + * a threshold to determine + * whether IO subsystem is idle + * or not + */ +#define GC_THREAD_MIN_SLEEP_TIME 10000 /* milliseconds */ +#define GC_THREAD_MAX_SLEEP_TIME 30000 +#define GC_THREAD_NOGC_SLEEP_TIME 10000 +#define LIMIT_INVALID_BLOCK 40 /* percentage over total user space */ +#define LIMIT_FREE_BLOCK 40 /* percentage over invalid + free space */ + +/* Search max. number of dirty segments to select a victim segment */ +#define MAX_VICTIM_SEARCH 20 + +enum { + GC_NONE = 0, + GC_ERROR, + GC_OK, + GC_NEXT, + GC_BLOCKED, + GC_DONE, +}; + +struct f2fs_gc_kthread { + struct task_struct *f2fs_gc_task; + wait_queue_head_t gc_wait_queue_head; +}; + +struct inode_entry { + struct list_head list; + struct inode *inode; +}; + +/* + * inline functions + */ +static inline block_t free_user_blocks(struct f2fs_sb_info *sbi) +{ + if (free_segments(sbi) < overprovision_segments(sbi)) + return 0; + else + return (free_segments(sbi) - overprovision_segments(sbi)) + << sbi->log_blocks_per_seg; +} + +static inline block_t limit_invalid_user_blocks(struct f2fs_sb_info *sbi) +{ + return (long)(sbi->user_block_count * LIMIT_INVALID_BLOCK) / 100; +} + +static inline block_t limit_free_user_blocks(struct f2fs_sb_info *sbi) +{ + block_t reclaimable_user_blocks = sbi->user_block_count - + written_block_count(sbi); + return (long)(reclaimable_user_blocks * LIMIT_FREE_BLOCK) / 100; +} + +static inline long increase_sleep_time(long wait) +{ + wait += GC_THREAD_MIN_SLEEP_TIME; + if (wait > GC_THREAD_MAX_SLEEP_TIME) + wait = GC_THREAD_MAX_SLEEP_TIME; + return wait; +} + +static inline long decrease_sleep_time(long wait) +{ + wait -= GC_THREAD_MIN_SLEEP_TIME; + if (wait <= GC_THREAD_MIN_SLEEP_TIME) + wait = GC_THREAD_MIN_SLEEP_TIME; + return wait; +} + +static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi) +{ + block_t invalid_user_blocks = sbi->user_block_count - + written_block_count(sbi); + /* + * Background GC is triggered with the following condition. + * 1. There are a number of invalid blocks. + * 2. There is not enough free space. + */ + if (invalid_user_blocks > limit_invalid_user_blocks(sbi) && + free_user_blocks(sbi) < limit_free_user_blocks(sbi)) + return true; + return false; +} + +static inline int is_idle(struct f2fs_sb_info *sbi) +{ + struct block_device *bdev = sbi->sb->s_bdev; + struct request_queue *q = bdev_get_queue(bdev); + struct request_list *rl = &q->root_rl; + return !(rl->count[BLK_RW_SYNC]) && !(rl->count[BLK_RW_ASYNC]); +} + +static inline bool should_do_checkpoint(struct f2fs_sb_info *sbi) +{ + unsigned int pages_per_sec = sbi->segs_per_sec * + (1 << sbi->log_blocks_per_seg); + int node_secs = ((get_pages(sbi, F2FS_DIRTY_NODES) + pages_per_sec - 1) + >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; + int dent_secs = ((get_pages(sbi, F2FS_DIRTY_DENTS) + pages_per_sec - 1) + >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; + return free_sections(sbi) <= (node_secs + 2 * dent_secs + 2); +} diff --git a/fs/f2fs/hash.c b/fs/f2fs/hash.c new file mode 100644 index 00000000000..6eb8d269b53 --- /dev/null +++ b/fs/f2fs/hash.c @@ -0,0 +1,101 @@ +/* + * fs/f2fs/hash.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * Portions of this code from linux/fs/ext3/hash.c + * + * Copyright (C) 2002 by Theodore Ts'o + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/types.h> +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/cryptohash.h> +#include <linux/pagemap.h> + +#include "f2fs.h" + +/* + * Hashing code copied from ext3 + */ +#define DELTA 0x9E3779B9 + +static void TEA_transform(unsigned int buf[4], unsigned int const in[]) +{ + __u32 sum = 0; + __u32 b0 = buf[0], b1 = buf[1]; + __u32 a = in[0], b = in[1], c = in[2], d = in[3]; + int n = 16; + + do { + sum += DELTA; + b0 += ((b1 << 4)+a) ^ (b1+sum) ^ ((b1 >> 5)+b); + b1 += ((b0 << 4)+c) ^ (b0+sum) ^ ((b0 >> 5)+d); + } while (--n); + + buf[0] += b0; + buf[1] += b1; +} + +static void str2hashbuf(const char *msg, size_t len, unsigned int *buf, int num) +{ + unsigned pad, val; + int i; + + pad = (__u32)len | ((__u32)len << 8); + pad |= pad << 16; + + val = pad; + if (len > num * 4) + len = num * 4; + for (i = 0; i < len; i++) { + if ((i % 4) == 0) + val = pad; + val = msg[i] + (val << 8); + if ((i % 4) == 3) { + *buf++ = val; + val = pad; + num--; + } + } + if (--num >= 0) + *buf++ = val; + while (--num >= 0) + *buf++ = pad; +} + +f2fs_hash_t f2fs_dentry_hash(const char *name, size_t len) +{ + __u32 hash; + f2fs_hash_t f2fs_hash; + const char *p; + __u32 in[8], buf[4]; + + if ((len <= 2) && (name[0] == '.') && + (name[1] == '.' || name[1] == '\0')) + return 0; + + /* Initialize the default seed for the hash checksum functions */ + buf[0] = 0x67452301; + buf[1] = 0xefcdab89; + buf[2] = 0x98badcfe; + buf[3] = 0x10325476; + + p = name; + while (1) { + str2hashbuf(p, len, in, 4); + TEA_transform(buf, in); + p += 16; + if (len <= 16) + break; + len -= 16; + } + hash = buf[0]; + f2fs_hash = cpu_to_le32(hash & ~F2FS_HASH_COL_BIT); + return f2fs_hash; +} diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c new file mode 100644 index 00000000000..79424177732 --- /dev/null +++ b/fs/f2fs/inode.c @@ -0,0 +1,272 @@ +/* + * fs/f2fs/inode.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/buffer_head.h> +#include <linux/writeback.h> + +#include "f2fs.h" +#include "node.h" + +struct f2fs_iget_args { + u64 ino; + int on_free; +}; + +void f2fs_set_inode_flags(struct inode *inode) +{ + unsigned int flags = F2FS_I(inode)->i_flags; + + inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | + S_NOATIME | S_DIRSYNC); + + if (flags & FS_SYNC_FL) + inode->i_flags |= S_SYNC; + if (flags & FS_APPEND_FL) + inode->i_flags |= S_APPEND; + if (flags & FS_IMMUTABLE_FL) + inode->i_flags |= S_IMMUTABLE; + if (flags & FS_NOATIME_FL) + inode->i_flags |= S_NOATIME; + if (flags & FS_DIRSYNC_FL) + inode->i_flags |= S_DIRSYNC; +} + +static int f2fs_iget_test(struct inode *inode, void *data) +{ + struct f2fs_iget_args *args = data; + + if (inode->i_ino != args->ino) + return 0; + if (inode->i_state & (I_FREEING | I_WILL_FREE)) { + args->on_free = 1; + return 0; + } + return 1; +} + +struct inode *f2fs_iget_nowait(struct super_block *sb, unsigned long ino) +{ + struct f2fs_iget_args args = { + .ino = ino, + .on_free = 0 + }; + struct inode *inode = ilookup5(sb, ino, f2fs_iget_test, &args); + + if (inode) + return inode; + if (!args.on_free) + return f2fs_iget(sb, ino); + return ERR_PTR(-ENOENT); +} + +static int do_read_inode(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_inode_info *fi = F2FS_I(inode); + struct page *node_page; + struct f2fs_node *rn; + struct f2fs_inode *ri; + + /* Check if ino is within scope */ + check_nid_range(sbi, inode->i_ino); + + node_page = get_node_page(sbi, inode->i_ino); + if (IS_ERR(node_page)) + return PTR_ERR(node_page); + + rn = page_address(node_page); + ri = &(rn->i); + + inode->i_mode = le16_to_cpu(ri->i_mode); + i_uid_write(inode, le32_to_cpu(ri->i_uid)); + i_gid_write(inode, le32_to_cpu(ri->i_gid)); + set_nlink(inode, le32_to_cpu(ri->i_links)); + inode->i_size = le64_to_cpu(ri->i_size); + inode->i_blocks = le64_to_cpu(ri->i_blocks); + + inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); + inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); + inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); + inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); + inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); + inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); + inode->i_generation = le32_to_cpu(ri->i_generation); + + fi->i_current_depth = le32_to_cpu(ri->i_current_depth); + fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); + fi->i_flags = le32_to_cpu(ri->i_flags); + fi->flags = 0; + fi->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1; + fi->i_advise = ri->i_advise; + fi->i_pino = le32_to_cpu(ri->i_pino); + get_extent_info(&fi->ext, ri->i_ext); + f2fs_put_page(node_page, 1); + return 0; +} + +struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + int ret; + + inode = iget_locked(sb, ino); + if (!inode) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; + if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) + goto make_now; + + ret = do_read_inode(inode); + if (ret) + goto bad_inode; + + if (!sbi->por_doing && inode->i_nlink == 0) { + ret = -ENOENT; + goto bad_inode; + } + +make_now: + if (ino == F2FS_NODE_INO(sbi)) { + inode->i_mapping->a_ops = &f2fs_node_aops; + mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); + } else if (ino == F2FS_META_INO(sbi)) { + inode->i_mapping->a_ops = &f2fs_meta_aops; + mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); + } else if (S_ISREG(inode->i_mode)) { + inode->i_op = &f2fs_file_inode_operations; + inode->i_fop = &f2fs_file_operations; + inode->i_mapping->a_ops = &f2fs_dblock_aops; + } else if (S_ISDIR(inode->i_mode)) { + inode->i_op = &f2fs_dir_inode_operations; + inode->i_fop = &f2fs_dir_operations; + inode->i_mapping->a_ops = &f2fs_dblock_aops; + mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER_MOVABLE | + __GFP_ZERO); + } else if (S_ISLNK(inode->i_mode)) { + inode->i_op = &f2fs_symlink_inode_operations; + inode->i_mapping->a_ops = &f2fs_dblock_aops; + } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || + S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { + inode->i_op = &f2fs_special_inode_operations; + init_special_inode(inode, inode->i_mode, inode->i_rdev); + } else { + ret = -EIO; + goto bad_inode; + } + unlock_new_inode(inode); + + return inode; + +bad_inode: + iget_failed(inode); + return ERR_PTR(ret); +} + +void update_inode(struct inode *inode, struct page *node_page) +{ + struct f2fs_node *rn; + struct f2fs_inode *ri; + + wait_on_page_writeback(node_page); + + rn = page_address(node_page); + ri = &(rn->i); + + ri->i_mode = cpu_to_le16(inode->i_mode); + ri->i_advise = F2FS_I(inode)->i_advise; + ri->i_uid = cpu_to_le32(i_uid_read(inode)); + ri->i_gid = cpu_to_le32(i_gid_read(inode)); + ri->i_links = cpu_to_le32(inode->i_nlink); + ri->i_size = cpu_to_le64(i_size_read(inode)); + ri->i_blocks = cpu_to_le64(inode->i_blocks); + set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); + + ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); + ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); + ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); + ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); + ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); + ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); + ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); + ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); + ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); + ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); + ri->i_generation = cpu_to_le32(inode->i_generation); + set_cold_node(inode, node_page); + set_page_dirty(node_page); +} + +int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct page *node_page; + bool need_lock = false; + + if (inode->i_ino == F2FS_NODE_INO(sbi) || + inode->i_ino == F2FS_META_INO(sbi)) + return 0; + + if (wbc) + f2fs_balance_fs(sbi); + + node_page = get_node_page(sbi, inode->i_ino); + if (IS_ERR(node_page)) + return PTR_ERR(node_page); + + if (!PageDirty(node_page)) { + need_lock = true; + f2fs_put_page(node_page, 1); + mutex_lock(&sbi->write_inode); + node_page = get_node_page(sbi, inode->i_ino); + if (IS_ERR(node_page)) { + mutex_unlock(&sbi->write_inode); + return PTR_ERR(node_page); + } + } + update_inode(inode, node_page); + f2fs_put_page(node_page, 1); + if (need_lock) + mutex_unlock(&sbi->write_inode); + return 0; +} + +/* + * Called at the last iput() if i_nlink is zero + */ +void f2fs_evict_inode(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + + truncate_inode_pages(&inode->i_data, 0); + + if (inode->i_ino == F2FS_NODE_INO(sbi) || + inode->i_ino == F2FS_META_INO(sbi)) + goto no_delete; + + BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents)); + remove_dirty_dir_inode(inode); + + if (inode->i_nlink || is_bad_inode(inode)) + goto no_delete; + + set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); + i_size_write(inode, 0); + + if (F2FS_HAS_BLOCKS(inode)) + f2fs_truncate(inode); + + remove_inode_page(inode); +no_delete: + clear_inode(inode); +} diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c new file mode 100644 index 00000000000..1a49b881bac --- /dev/null +++ b/fs/f2fs/namei.c @@ -0,0 +1,503 @@ +/* + * fs/f2fs/namei.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/pagemap.h> +#include <linux/sched.h> +#include <linux/ctype.h> + +#include "f2fs.h" +#include "xattr.h" +#include "acl.h" + +static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + nid_t ino; + struct inode *inode; + bool nid_free = false; + int err; + + inode = new_inode(sb); + if (!inode) + return ERR_PTR(-ENOMEM); + + mutex_lock_op(sbi, NODE_NEW); + if (!alloc_nid(sbi, &ino)) { + mutex_unlock_op(sbi, NODE_NEW); + err = -ENOSPC; + goto fail; + } + mutex_unlock_op(sbi, NODE_NEW); + + inode->i_uid = current_fsuid(); + + if (dir->i_mode & S_ISGID) { + inode->i_gid = dir->i_gid; + if (S_ISDIR(mode)) + mode |= S_ISGID; + } else { + inode->i_gid = current_fsgid(); + } + + inode->i_ino = ino; + inode->i_mode = mode; + inode->i_blocks = 0; + inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; + inode->i_generation = sbi->s_next_generation++; + + err = insert_inode_locked(inode); + if (err) { + err = -EINVAL; + nid_free = true; + goto out; + } + + mark_inode_dirty(inode); + return inode; + +out: + clear_nlink(inode); + unlock_new_inode(inode); +fail: + iput(inode); + if (nid_free) + alloc_nid_failed(sbi, ino); + return ERR_PTR(err); +} + +static int is_multimedia_file(const unsigned char *s, const char *sub) +{ + size_t slen = strlen(s); + size_t sublen = strlen(sub); + int ret; + + if (sublen > slen) + return 1; + + ret = memcmp(s + slen - sublen, sub, sublen); + if (ret) { /* compare upper case */ + int i; + char upper_sub[8]; + for (i = 0; i < sublen && i < sizeof(upper_sub); i++) + upper_sub[i] = toupper(sub[i]); + return memcmp(s + slen - sublen, upper_sub, sublen); + } + + return ret; +} + +/* + * Set multimedia files as cold files for hot/cold data separation + */ +static inline void set_cold_file(struct f2fs_sb_info *sbi, struct inode *inode, + const unsigned char *name) +{ + int i; + __u8 (*extlist)[8] = sbi->raw_super->extension_list; + + int count = le32_to_cpu(sbi->raw_super->extension_count); + for (i = 0; i < count; i++) { + if (!is_multimedia_file(name, extlist[i])) { + F2FS_I(inode)->i_advise |= FADVISE_COLD_BIT; + break; + } + } +} + +static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, + bool excl) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + nid_t ino = 0; + int err; + + f2fs_balance_fs(sbi); + + inode = f2fs_new_inode(dir, mode); + if (IS_ERR(inode)) + return PTR_ERR(inode); + + if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) + set_cold_file(sbi, inode, dentry->d_name.name); + + inode->i_op = &f2fs_file_inode_operations; + inode->i_fop = &f2fs_file_operations; + inode->i_mapping->a_ops = &f2fs_dblock_aops; + ino = inode->i_ino; + + err = f2fs_add_link(dentry, inode); + if (err) + goto out; + + alloc_nid_done(sbi, ino); + + if (!sbi->por_doing) + d_instantiate(dentry, inode); + unlock_new_inode(inode); + return 0; +out: + clear_nlink(inode); + unlock_new_inode(inode); + iput(inode); + alloc_nid_failed(sbi, ino); + return err; +} + +static int f2fs_link(struct dentry *old_dentry, struct inode *dir, + struct dentry *dentry) +{ + struct inode *inode = old_dentry->d_inode; + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int err; + + f2fs_balance_fs(sbi); + + inode->i_ctime = CURRENT_TIME; + atomic_inc(&inode->i_count); + + set_inode_flag(F2FS_I(inode), FI_INC_LINK); + err = f2fs_add_link(dentry, inode); + if (err) + goto out; + + d_instantiate(dentry, inode); + return 0; +out: + clear_inode_flag(F2FS_I(inode), FI_INC_LINK); + iput(inode); + return err; +} + +struct dentry *f2fs_get_parent(struct dentry *child) +{ + struct qstr dotdot = QSTR_INIT("..", 2); + unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot); + if (!ino) + return ERR_PTR(-ENOENT); + return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino)); +} + +static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, + unsigned int flags) +{ + struct inode *inode = NULL; + struct f2fs_dir_entry *de; + struct page *page; + + if (dentry->d_name.len > F2FS_MAX_NAME_LEN) + return ERR_PTR(-ENAMETOOLONG); + + de = f2fs_find_entry(dir, &dentry->d_name, &page); + if (de) { + nid_t ino = le32_to_cpu(de->ino); + kunmap(page); + f2fs_put_page(page, 0); + + inode = f2fs_iget(dir->i_sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); + } + + return d_splice_alias(inode, dentry); +} + +static int f2fs_unlink(struct inode *dir, struct dentry *dentry) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode = dentry->d_inode; + struct f2fs_dir_entry *de; + struct page *page; + int err = -ENOENT; + + f2fs_balance_fs(sbi); + + de = f2fs_find_entry(dir, &dentry->d_name, &page); + if (!de) + goto fail; + + err = check_orphan_space(sbi); + if (err) { + kunmap(page); + f2fs_put_page(page, 0); + goto fail; + } + + f2fs_delete_entry(de, page, inode); + + /* In order to evict this inode, we set it dirty */ + mark_inode_dirty(inode); +fail: + return err; +} + +static int f2fs_symlink(struct inode *dir, struct dentry *dentry, + const char *symname) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + size_t symlen = strlen(symname) + 1; + int err; + + f2fs_balance_fs(sbi); + + inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); + if (IS_ERR(inode)) + return PTR_ERR(inode); + + inode->i_op = &f2fs_symlink_inode_operations; + inode->i_mapping->a_ops = &f2fs_dblock_aops; + + err = f2fs_add_link(dentry, inode); + if (err) + goto out; + + err = page_symlink(inode, symname, symlen); + alloc_nid_done(sbi, inode->i_ino); + + d_instantiate(dentry, inode); + unlock_new_inode(inode); + return err; +out: + clear_nlink(inode); + unlock_new_inode(inode); + iput(inode); + alloc_nid_failed(sbi, inode->i_ino); + return err; +} + +static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); + struct inode *inode; + int err; + + f2fs_balance_fs(sbi); + + inode = f2fs_new_inode(dir, S_IFDIR | mode); + if (IS_ERR(inode)) + return PTR_ERR(inode); + + inode->i_op = &f2fs_dir_inode_operations; + inode->i_fop = &f2fs_dir_operations; + inode->i_mapping->a_ops = &f2fs_dblock_aops; + mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); + + set_inode_flag(F2FS_I(inode), FI_INC_LINK); + err = f2fs_add_link(dentry, inode); + if (err) + goto out_fail; + + alloc_nid_done(sbi, inode->i_ino); + + d_instantiate(dentry, inode); + unlock_new_inode(inode); + + return 0; + +out_fail: + clear_inode_flag(F2FS_I(inode), FI_INC_LINK); + clear_nlink(inode); + unlock_new_inode(inode); + iput(inode); + alloc_nid_failed(sbi, inode->i_ino); + return err; +} + +static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) +{ + struct inode *inode = dentry->d_inode; + if (f2fs_empty_dir(inode)) + return f2fs_unlink(dir, dentry); + return -ENOTEMPTY; +} + +static int f2fs_mknod(struct inode *dir, struct dentry *dentry, + umode_t mode, dev_t rdev) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + int err = 0; + + if (!new_valid_dev(rdev)) + return -EINVAL; + + f2fs_balance_fs(sbi); + + inode = f2fs_new_inode(dir, mode); + if (IS_ERR(inode)) + return PTR_ERR(inode); + + init_special_inode(inode, inode->i_mode, rdev); + inode->i_op = &f2fs_special_inode_operations; + + err = f2fs_add_link(dentry, inode); + if (err) + goto out; + + alloc_nid_done(sbi, inode->i_ino); + d_instantiate(dentry, inode); + unlock_new_inode(inode); + return 0; +out: + clear_nlink(inode); + unlock_new_inode(inode); + iput(inode); + alloc_nid_failed(sbi, inode->i_ino); + return err; +} + +static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) +{ + struct super_block *sb = old_dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *old_inode = old_dentry->d_inode; + struct inode *new_inode = new_dentry->d_inode; + struct page *old_dir_page; + struct page *old_page; + struct f2fs_dir_entry *old_dir_entry = NULL; + struct f2fs_dir_entry *old_entry; + struct f2fs_dir_entry *new_entry; + int err = -ENOENT; + + f2fs_balance_fs(sbi); + + old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); + if (!old_entry) + goto out; + + if (S_ISDIR(old_inode->i_mode)) { + err = -EIO; + old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); + if (!old_dir_entry) + goto out_old; + } + + mutex_lock_op(sbi, RENAME); + + if (new_inode) { + struct page *new_page; + + err = -ENOTEMPTY; + if (old_dir_entry && !f2fs_empty_dir(new_inode)) + goto out_dir; + + err = -ENOENT; + new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, + &new_page); + if (!new_entry) + goto out_dir; + + f2fs_set_link(new_dir, new_entry, new_page, old_inode); + + new_inode->i_ctime = CURRENT_TIME; + if (old_dir_entry) + drop_nlink(new_inode); + drop_nlink(new_inode); + if (!new_inode->i_nlink) + add_orphan_inode(sbi, new_inode->i_ino); + f2fs_write_inode(new_inode, NULL); + } else { + err = f2fs_add_link(new_dentry, old_inode); + if (err) + goto out_dir; + + if (old_dir_entry) { + inc_nlink(new_dir); + f2fs_write_inode(new_dir, NULL); + } + } + + old_inode->i_ctime = CURRENT_TIME; + set_inode_flag(F2FS_I(old_inode), FI_NEED_CP); + mark_inode_dirty(old_inode); + + f2fs_delete_entry(old_entry, old_page, NULL); + + if (old_dir_entry) { + if (old_dir != new_dir) { + f2fs_set_link(old_inode, old_dir_entry, + old_dir_page, new_dir); + } else { + kunmap(old_dir_page); + f2fs_put_page(old_dir_page, 0); + } + drop_nlink(old_dir); + f2fs_write_inode(old_dir, NULL); + } + + mutex_unlock_op(sbi, RENAME); + return 0; + +out_dir: + if (old_dir_entry) { + kunmap(old_dir_page); + f2fs_put_page(old_dir_page, 0); + } + mutex_unlock_op(sbi, RENAME); +out_old: + kunmap(old_page); + f2fs_put_page(old_page, 0); +out: + return err; +} + +const struct inode_operations f2fs_dir_inode_operations = { + .create = f2fs_create, + .lookup = f2fs_lookup, + .link = f2fs_link, + .unlink = f2fs_unlink, + .symlink = f2fs_symlink, + .mkdir = f2fs_mkdir, + .rmdir = f2fs_rmdir, + .mknod = f2fs_mknod, + .rename = f2fs_rename, + .setattr = f2fs_setattr, + .get_acl = f2fs_get_acl, +#ifdef CONFIG_F2FS_FS_XATTR + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = f2fs_listxattr, + .removexattr = generic_removexattr, +#endif +}; + +const struct inode_operations f2fs_symlink_inode_operations = { + .readlink = generic_readlink, + .follow_link = page_follow_link_light, + .put_link = page_put_link, + .setattr = f2fs_setattr, +#ifdef CONFIG_F2FS_FS_XATTR + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = f2fs_listxattr, + .removexattr = generic_removexattr, +#endif +}; + +const struct inode_operations f2fs_special_inode_operations = { + .setattr = f2fs_setattr, + .get_acl = f2fs_get_acl, +#ifdef CONFIG_F2FS_FS_XATTR + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = f2fs_listxattr, + .removexattr = generic_removexattr, +#endif +}; diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c new file mode 100644 index 00000000000..9bda63c9c16 --- /dev/null +++ b/fs/f2fs/node.c @@ -0,0 +1,1760 @@ +/* + * fs/f2fs/node.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/mpage.h> +#include <linux/backing-dev.h> +#include <linux/blkdev.h> +#include <linux/pagevec.h> +#include <linux/swap.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" + +static struct kmem_cache *nat_entry_slab; +static struct kmem_cache *free_nid_slab; + +static void clear_node_page_dirty(struct page *page) +{ + struct address_space *mapping = page->mapping; + struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); + unsigned int long flags; + + if (PageDirty(page)) { + spin_lock_irqsave(&mapping->tree_lock, flags); + radix_tree_tag_clear(&mapping->page_tree, + page_index(page), + PAGECACHE_TAG_DIRTY); + spin_unlock_irqrestore(&mapping->tree_lock, flags); + + clear_page_dirty_for_io(page); + dec_page_count(sbi, F2FS_DIRTY_NODES); + } + ClearPageUptodate(page); +} + +static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid) +{ + pgoff_t index = current_nat_addr(sbi, nid); + return get_meta_page(sbi, index); +} + +static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid) +{ + struct page *src_page; + struct page *dst_page; + pgoff_t src_off; + pgoff_t dst_off; + void *src_addr; + void *dst_addr; + struct f2fs_nm_info *nm_i = NM_I(sbi); + + src_off = current_nat_addr(sbi, nid); + dst_off = next_nat_addr(sbi, src_off); + + /* get current nat block page with lock */ + src_page = get_meta_page(sbi, src_off); + + /* Dirty src_page means that it is already the new target NAT page. */ + if (PageDirty(src_page)) + return src_page; + + dst_page = grab_meta_page(sbi, dst_off); + + src_addr = page_address(src_page); + dst_addr = page_address(dst_page); + memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); + set_page_dirty(dst_page); + f2fs_put_page(src_page, 1); + + set_to_next_nat(nm_i, nid); + + return dst_page; +} + +/* + * Readahead NAT pages + */ +static void ra_nat_pages(struct f2fs_sb_info *sbi, int nid) +{ + struct address_space *mapping = sbi->meta_inode->i_mapping; + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct page *page; + pgoff_t index; + int i; + + for (i = 0; i < FREE_NID_PAGES; i++, nid += NAT_ENTRY_PER_BLOCK) { + if (nid >= nm_i->max_nid) + nid = 0; + index = current_nat_addr(sbi, nid); + + page = grab_cache_page(mapping, index); + if (!page) + continue; + if (f2fs_readpage(sbi, page, index, READ)) { + f2fs_put_page(page, 1); + continue; + } + page_cache_release(page); + } +} + +static struct nat_entry *__lookup_nat_cache(struct f2fs_nm_info *nm_i, nid_t n) +{ + return radix_tree_lookup(&nm_i->nat_root, n); +} + +static unsigned int __gang_lookup_nat_cache(struct f2fs_nm_info *nm_i, + nid_t start, unsigned int nr, struct nat_entry **ep) +{ + return radix_tree_gang_lookup(&nm_i->nat_root, (void **)ep, start, nr); +} + +static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e) +{ + list_del(&e->list); + radix_tree_delete(&nm_i->nat_root, nat_get_nid(e)); + nm_i->nat_cnt--; + kmem_cache_free(nat_entry_slab, e); +} + +int is_checkpointed_node(struct f2fs_sb_info *sbi, nid_t nid) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct nat_entry *e; + int is_cp = 1; + + read_lock(&nm_i->nat_tree_lock); + e = __lookup_nat_cache(nm_i, nid); + if (e && !e->checkpointed) + is_cp = 0; + read_unlock(&nm_i->nat_tree_lock); + return is_cp; +} + +static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid) +{ + struct nat_entry *new; + + new = kmem_cache_alloc(nat_entry_slab, GFP_ATOMIC); + if (!new) + return NULL; + if (radix_tree_insert(&nm_i->nat_root, nid, new)) { + kmem_cache_free(nat_entry_slab, new); + return NULL; + } + memset(new, 0, sizeof(struct nat_entry)); + nat_set_nid(new, nid); + list_add_tail(&new->list, &nm_i->nat_entries); + nm_i->nat_cnt++; + return new; +} + +static void cache_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid, + struct f2fs_nat_entry *ne) +{ + struct nat_entry *e; +retry: + write_lock(&nm_i->nat_tree_lock); + e = __lookup_nat_cache(nm_i, nid); + if (!e) { + e = grab_nat_entry(nm_i, nid); + if (!e) { + write_unlock(&nm_i->nat_tree_lock); + goto retry; + } + nat_set_blkaddr(e, le32_to_cpu(ne->block_addr)); + nat_set_ino(e, le32_to_cpu(ne->ino)); + nat_set_version(e, ne->version); + e->checkpointed = true; + } + write_unlock(&nm_i->nat_tree_lock); +} + +static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, + block_t new_blkaddr) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct nat_entry *e; +retry: + write_lock(&nm_i->nat_tree_lock); + e = __lookup_nat_cache(nm_i, ni->nid); + if (!e) { + e = grab_nat_entry(nm_i, ni->nid); + if (!e) { + write_unlock(&nm_i->nat_tree_lock); + goto retry; + } + e->ni = *ni; + e->checkpointed = true; + BUG_ON(ni->blk_addr == NEW_ADDR); + } else if (new_blkaddr == NEW_ADDR) { + /* + * when nid is reallocated, + * previous nat entry can be remained in nat cache. + * So, reinitialize it with new information. + */ + e->ni = *ni; + BUG_ON(ni->blk_addr != NULL_ADDR); + } + + if (new_blkaddr == NEW_ADDR) + e->checkpointed = false; + + /* sanity check */ + BUG_ON(nat_get_blkaddr(e) != ni->blk_addr); + BUG_ON(nat_get_blkaddr(e) == NULL_ADDR && + new_blkaddr == NULL_ADDR); + BUG_ON(nat_get_blkaddr(e) == NEW_ADDR && + new_blkaddr == NEW_ADDR); + BUG_ON(nat_get_blkaddr(e) != NEW_ADDR && + nat_get_blkaddr(e) != NULL_ADDR && + new_blkaddr == NEW_ADDR); + + /* increament version no as node is removed */ + if (nat_get_blkaddr(e) != NEW_ADDR && new_blkaddr == NULL_ADDR) { + unsigned char version = nat_get_version(e); + nat_set_version(e, inc_node_version(version)); + } + + /* change address */ + nat_set_blkaddr(e, new_blkaddr); + __set_nat_cache_dirty(nm_i, e); + write_unlock(&nm_i->nat_tree_lock); +} + +static int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + + if (nm_i->nat_cnt < 2 * NM_WOUT_THRESHOLD) + return 0; + + write_lock(&nm_i->nat_tree_lock); + while (nr_shrink && !list_empty(&nm_i->nat_entries)) { + struct nat_entry *ne; + ne = list_first_entry(&nm_i->nat_entries, + struct nat_entry, list); + __del_from_nat_cache(nm_i, ne); + nr_shrink--; + } + write_unlock(&nm_i->nat_tree_lock); + return nr_shrink; +} + +/* + * This function returns always success + */ +void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); + struct f2fs_summary_block *sum = curseg->sum_blk; + nid_t start_nid = START_NID(nid); + struct f2fs_nat_block *nat_blk; + struct page *page = NULL; + struct f2fs_nat_entry ne; + struct nat_entry *e; + int i; + + memset(&ne, 0, sizeof(struct f2fs_nat_entry)); + ni->nid = nid; + + /* Check nat cache */ + read_lock(&nm_i->nat_tree_lock); + e = __lookup_nat_cache(nm_i, nid); + if (e) { + ni->ino = nat_get_ino(e); + ni->blk_addr = nat_get_blkaddr(e); + ni->version = nat_get_version(e); + } + read_unlock(&nm_i->nat_tree_lock); + if (e) + return; + + /* Check current segment summary */ + mutex_lock(&curseg->curseg_mutex); + i = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 0); + if (i >= 0) { + ne = nat_in_journal(sum, i); + node_info_from_raw_nat(ni, &ne); + } + mutex_unlock(&curseg->curseg_mutex); + if (i >= 0) + goto cache; + + /* Fill node_info from nat page */ + page = get_current_nat_page(sbi, start_nid); + nat_blk = (struct f2fs_nat_block *)page_address(page); + ne = nat_blk->entries[nid - start_nid]; + node_info_from_raw_nat(ni, &ne); + f2fs_put_page(page, 1); +cache: + /* cache nat entry */ + cache_nat_entry(NM_I(sbi), nid, &ne); +} + +/* + * The maximum depth is four. + * Offset[0] will have raw inode offset. + */ +static int get_node_path(long block, int offset[4], unsigned int noffset[4]) +{ + const long direct_index = ADDRS_PER_INODE; + const long direct_blks = ADDRS_PER_BLOCK; + const long dptrs_per_blk = NIDS_PER_BLOCK; + const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK; + const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK; + int n = 0; + int level = 0; + + noffset[0] = 0; + + if (block < direct_index) { + offset[n++] = block; + level = 0; + goto got; + } + block -= direct_index; + if (block < direct_blks) { + offset[n++] = NODE_DIR1_BLOCK; + noffset[n] = 1; + offset[n++] = block; + level = 1; + goto got; + } + block -= direct_blks; + if (block < direct_blks) { + offset[n++] = NODE_DIR2_BLOCK; + noffset[n] = 2; + offset[n++] = block; + level = 1; + goto got; + } + block -= direct_blks; + if (block < indirect_blks) { + offset[n++] = NODE_IND1_BLOCK; + noffset[n] = 3; + offset[n++] = block / direct_blks; + noffset[n] = 4 + offset[n - 1]; + offset[n++] = block % direct_blks; + level = 2; + goto got; + } + block -= indirect_blks; + if (block < indirect_blks) { + offset[n++] = NODE_IND2_BLOCK; + noffset[n] = 4 + dptrs_per_blk; + offset[n++] = block / direct_blks; + noffset[n] = 5 + dptrs_per_blk + offset[n - 1]; + offset[n++] = block % direct_blks; + level = 2; + goto got; + } + block -= indirect_blks; + if (block < dindirect_blks) { + offset[n++] = NODE_DIND_BLOCK; + noffset[n] = 5 + (dptrs_per_blk * 2); + offset[n++] = block / indirect_blks; + noffset[n] = 6 + (dptrs_per_blk * 2) + + offset[n - 1] * (dptrs_per_blk + 1); + offset[n++] = (block / direct_blks) % dptrs_per_blk; + noffset[n] = 7 + (dptrs_per_blk * 2) + + offset[n - 2] * (dptrs_per_blk + 1) + + offset[n - 1]; + offset[n++] = block % direct_blks; + level = 3; + goto got; + } else { + BUG(); + } +got: + return level; +} + +/* + * Caller should call f2fs_put_dnode(dn). + */ +int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int ro) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + struct page *npage[4]; + struct page *parent; + int offset[4]; + unsigned int noffset[4]; + nid_t nids[4]; + int level, i; + int err = 0; + + level = get_node_path(index, offset, noffset); + + nids[0] = dn->inode->i_ino; + npage[0] = get_node_page(sbi, nids[0]); + if (IS_ERR(npage[0])) + return PTR_ERR(npage[0]); + + parent = npage[0]; + nids[1] = get_nid(parent, offset[0], true); + dn->inode_page = npage[0]; + dn->inode_page_locked = true; + + /* get indirect or direct nodes */ + for (i = 1; i <= level; i++) { + bool done = false; + + if (!nids[i] && !ro) { + mutex_lock_op(sbi, NODE_NEW); + + /* alloc new node */ + if (!alloc_nid(sbi, &(nids[i]))) { + mutex_unlock_op(sbi, NODE_NEW); + err = -ENOSPC; + goto release_pages; + } + + dn->nid = nids[i]; + npage[i] = new_node_page(dn, noffset[i]); + if (IS_ERR(npage[i])) { + alloc_nid_failed(sbi, nids[i]); + mutex_unlock_op(sbi, NODE_NEW); + err = PTR_ERR(npage[i]); + goto release_pages; + } + + set_nid(parent, offset[i - 1], nids[i], i == 1); + alloc_nid_done(sbi, nids[i]); + mutex_unlock_op(sbi, NODE_NEW); + done = true; + } else if (ro && i == level && level > 1) { + npage[i] = get_node_page_ra(parent, offset[i - 1]); + if (IS_ERR(npage[i])) { + err = PTR_ERR(npage[i]); + goto release_pages; + } + done = true; + } + if (i == 1) { + dn->inode_page_locked = false; + unlock_page(parent); + } else { + f2fs_put_page(parent, 1); + } + + if (!done) { + npage[i] = get_node_page(sbi, nids[i]); + if (IS_ERR(npage[i])) { + err = PTR_ERR(npage[i]); + f2fs_put_page(npage[0], 0); + goto release_out; + } + } + if (i < level) { + parent = npage[i]; + nids[i + 1] = get_nid(parent, offset[i], false); + } + } + dn->nid = nids[level]; + dn->ofs_in_node = offset[level]; + dn->node_page = npage[level]; + dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); + return 0; + +release_pages: + f2fs_put_page(parent, 1); + if (i > 1) + f2fs_put_page(npage[0], 0); +release_out: + dn->inode_page = NULL; + dn->node_page = NULL; + return err; +} + +static void truncate_node(struct dnode_of_data *dn) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + struct node_info ni; + + get_node_info(sbi, dn->nid, &ni); + if (dn->inode->i_blocks == 0) { + BUG_ON(ni.blk_addr != NULL_ADDR); + goto invalidate; + } + BUG_ON(ni.blk_addr == NULL_ADDR); + + /* Deallocate node address */ + invalidate_blocks(sbi, ni.blk_addr); + dec_valid_node_count(sbi, dn->inode, 1); + set_node_addr(sbi, &ni, NULL_ADDR); + + if (dn->nid == dn->inode->i_ino) { + remove_orphan_inode(sbi, dn->nid); + dec_valid_inode_count(sbi); + } else { + sync_inode_page(dn); + } +invalidate: + clear_node_page_dirty(dn->node_page); + F2FS_SET_SB_DIRT(sbi); + + f2fs_put_page(dn->node_page, 1); + dn->node_page = NULL; +} + +static int truncate_dnode(struct dnode_of_data *dn) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + struct page *page; + + if (dn->nid == 0) + return 1; + + /* get direct node */ + page = get_node_page(sbi, dn->nid); + if (IS_ERR(page) && PTR_ERR(page) == -ENOENT) + return 1; + else if (IS_ERR(page)) + return PTR_ERR(page); + + /* Make dnode_of_data for parameter */ + dn->node_page = page; + dn->ofs_in_node = 0; + truncate_data_blocks(dn); + truncate_node(dn); + return 1; +} + +static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs, + int ofs, int depth) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + struct dnode_of_data rdn = *dn; + struct page *page; + struct f2fs_node *rn; + nid_t child_nid; + unsigned int child_nofs; + int freed = 0; + int i, ret; + + if (dn->nid == 0) + return NIDS_PER_BLOCK + 1; + + page = get_node_page(sbi, dn->nid); + if (IS_ERR(page)) + return PTR_ERR(page); + + rn = (struct f2fs_node *)page_address(page); + if (depth < 3) { + for (i = ofs; i < NIDS_PER_BLOCK; i++, freed++) { + child_nid = le32_to_cpu(rn->in.nid[i]); + if (child_nid == 0) + continue; + rdn.nid = child_nid; + ret = truncate_dnode(&rdn); + if (ret < 0) + goto out_err; + set_nid(page, i, 0, false); + } + } else { + child_nofs = nofs + ofs * (NIDS_PER_BLOCK + 1) + 1; + for (i = ofs; i < NIDS_PER_BLOCK; i++) { + child_nid = le32_to_cpu(rn->in.nid[i]); + if (child_nid == 0) { + child_nofs += NIDS_PER_BLOCK + 1; + continue; + } + rdn.nid = child_nid; + ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1); + if (ret == (NIDS_PER_BLOCK + 1)) { + set_nid(page, i, 0, false); + child_nofs += ret; + } else if (ret < 0 && ret != -ENOENT) { + goto out_err; + } + } + freed = child_nofs; + } + + if (!ofs) { + /* remove current indirect node */ + dn->node_page = page; + truncate_node(dn); + freed++; + } else { + f2fs_put_page(page, 1); + } + return freed; + +out_err: + f2fs_put_page(page, 1); + return ret; +} + +static int truncate_partial_nodes(struct dnode_of_data *dn, + struct f2fs_inode *ri, int *offset, int depth) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + struct page *pages[2]; + nid_t nid[3]; + nid_t child_nid; + int err = 0; + int i; + int idx = depth - 2; + + nid[0] = le32_to_cpu(ri->i_nid[offset[0] - NODE_DIR1_BLOCK]); + if (!nid[0]) + return 0; + + /* get indirect nodes in the path */ + for (i = 0; i < depth - 1; i++) { + /* refernece count'll be increased */ + pages[i] = get_node_page(sbi, nid[i]); + if (IS_ERR(pages[i])) { + depth = i + 1; + err = PTR_ERR(pages[i]); + goto fail; + } + nid[i + 1] = get_nid(pages[i], offset[i + 1], false); + } + + /* free direct nodes linked to a partial indirect node */ + for (i = offset[depth - 1]; i < NIDS_PER_BLOCK; i++) { + child_nid = get_nid(pages[idx], i, false); + if (!child_nid) + continue; + dn->nid = child_nid; + err = truncate_dnode(dn); + if (err < 0) + goto fail; + set_nid(pages[idx], i, 0, false); + } + + if (offset[depth - 1] == 0) { + dn->node_page = pages[idx]; + dn->nid = nid[idx]; + truncate_node(dn); + } else { + f2fs_put_page(pages[idx], 1); + } + offset[idx]++; + offset[depth - 1] = 0; +fail: + for (i = depth - 3; i >= 0; i--) + f2fs_put_page(pages[i], 1); + return err; +} + +/* + * All the block addresses of data and nodes should be nullified. + */ +int truncate_inode_blocks(struct inode *inode, pgoff_t from) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + int err = 0, cont = 1; + int level, offset[4], noffset[4]; + unsigned int nofs; + struct f2fs_node *rn; + struct dnode_of_data dn; + struct page *page; + + level = get_node_path(from, offset, noffset); + + page = get_node_page(sbi, inode->i_ino); + if (IS_ERR(page)) + return PTR_ERR(page); + + set_new_dnode(&dn, inode, page, NULL, 0); + unlock_page(page); + + rn = page_address(page); + switch (level) { + case 0: + case 1: + nofs = noffset[1]; + break; + case 2: + nofs = noffset[1]; + if (!offset[level - 1]) + goto skip_partial; + err = truncate_partial_nodes(&dn, &rn->i, offset, level); + if (err < 0 && err != -ENOENT) + goto fail; + nofs += 1 + NIDS_PER_BLOCK; + break; + case 3: + nofs = 5 + 2 * NIDS_PER_BLOCK; + if (!offset[level - 1]) + goto skip_partial; + err = truncate_partial_nodes(&dn, &rn->i, offset, level); + if (err < 0 && err != -ENOENT) + goto fail; + break; + default: + BUG(); + } + +skip_partial: + while (cont) { + dn.nid = le32_to_cpu(rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK]); + switch (offset[0]) { + case NODE_DIR1_BLOCK: + case NODE_DIR2_BLOCK: + err = truncate_dnode(&dn); + break; + + case NODE_IND1_BLOCK: + case NODE_IND2_BLOCK: + err = truncate_nodes(&dn, nofs, offset[1], 2); + break; + + case NODE_DIND_BLOCK: + err = truncate_nodes(&dn, nofs, offset[1], 3); + cont = 0; + break; + + default: + BUG(); + } + if (err < 0 && err != -ENOENT) + goto fail; + if (offset[1] == 0 && + rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK]) { + lock_page(page); + wait_on_page_writeback(page); + rn->i.i_nid[offset[0] - NODE_DIR1_BLOCK] = 0; + set_page_dirty(page); + unlock_page(page); + } + offset[1] = 0; + offset[0]++; + nofs += err; + } +fail: + f2fs_put_page(page, 0); + return err > 0 ? 0 : err; +} + +int remove_inode_page(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct page *page; + nid_t ino = inode->i_ino; + struct dnode_of_data dn; + + mutex_lock_op(sbi, NODE_TRUNC); + page = get_node_page(sbi, ino); + if (IS_ERR(page)) { + mutex_unlock_op(sbi, NODE_TRUNC); + return PTR_ERR(page); + } + + if (F2FS_I(inode)->i_xattr_nid) { + nid_t nid = F2FS_I(inode)->i_xattr_nid; + struct page *npage = get_node_page(sbi, nid); + + if (IS_ERR(npage)) { + mutex_unlock_op(sbi, NODE_TRUNC); + return PTR_ERR(npage); + } + + F2FS_I(inode)->i_xattr_nid = 0; + set_new_dnode(&dn, inode, page, npage, nid); + dn.inode_page_locked = 1; + truncate_node(&dn); + } + + /* 0 is possible, after f2fs_new_inode() is failed */ + BUG_ON(inode->i_blocks != 0 && inode->i_blocks != 1); + set_new_dnode(&dn, inode, page, page, ino); + truncate_node(&dn); + + mutex_unlock_op(sbi, NODE_TRUNC); + return 0; +} + +int new_inode_page(struct inode *inode, struct dentry *dentry) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct page *page; + struct dnode_of_data dn; + + /* allocate inode page for new inode */ + set_new_dnode(&dn, inode, NULL, NULL, inode->i_ino); + mutex_lock_op(sbi, NODE_NEW); + page = new_node_page(&dn, 0); + init_dent_inode(dentry, page); + mutex_unlock_op(sbi, NODE_NEW); + if (IS_ERR(page)) + return PTR_ERR(page); + f2fs_put_page(page, 1); + return 0; +} + +struct page *new_node_page(struct dnode_of_data *dn, unsigned int ofs) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); + struct address_space *mapping = sbi->node_inode->i_mapping; + struct node_info old_ni, new_ni; + struct page *page; + int err; + + if (is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC)) + return ERR_PTR(-EPERM); + + page = grab_cache_page(mapping, dn->nid); + if (!page) + return ERR_PTR(-ENOMEM); + + get_node_info(sbi, dn->nid, &old_ni); + + SetPageUptodate(page); + fill_node_footer(page, dn->nid, dn->inode->i_ino, ofs, true); + + /* Reinitialize old_ni with new node page */ + BUG_ON(old_ni.blk_addr != NULL_ADDR); + new_ni = old_ni; + new_ni.ino = dn->inode->i_ino; + + if (!inc_valid_node_count(sbi, dn->inode, 1)) { + err = -ENOSPC; + goto fail; + } + set_node_addr(sbi, &new_ni, NEW_ADDR); + set_cold_node(dn->inode, page); + + dn->node_page = page; + sync_inode_page(dn); + set_page_dirty(page); + if (ofs == 0) + inc_valid_inode_count(sbi); + + return page; + +fail: + clear_node_page_dirty(page); + f2fs_put_page(page, 1); + return ERR_PTR(err); +} + +static int read_node_page(struct page *page, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); + struct node_info ni; + + get_node_info(sbi, page->index, &ni); + + if (ni.blk_addr == NULL_ADDR) + return -ENOENT; + return f2fs_readpage(sbi, page, ni.blk_addr, type); +} + +/* + * Readahead a node page + */ +void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) +{ + struct address_space *mapping = sbi->node_inode->i_mapping; + struct page *apage; + + apage = find_get_page(mapping, nid); + if (apage && PageUptodate(apage)) + goto release_out; + f2fs_put_page(apage, 0); + + apage = grab_cache_page(mapping, nid); + if (!apage) + return; + + if (read_node_page(apage, READA)) + goto unlock_out; + + page_cache_release(apage); + return; + +unlock_out: + unlock_page(apage); +release_out: + page_cache_release(apage); +} + +struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) +{ + int err; + struct page *page; + struct address_space *mapping = sbi->node_inode->i_mapping; + + page = grab_cache_page(mapping, nid); + if (!page) + return ERR_PTR(-ENOMEM); + + err = read_node_page(page, READ_SYNC); + if (err) { + f2fs_put_page(page, 1); + return ERR_PTR(err); + } + + BUG_ON(nid != nid_of_node(page)); + mark_page_accessed(page); + return page; +} + +/* + * Return a locked page for the desired node page. + * And, readahead MAX_RA_NODE number of node pages. + */ +struct page *get_node_page_ra(struct page *parent, int start) +{ + struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb); + struct address_space *mapping = sbi->node_inode->i_mapping; + int i, end; + int err = 0; + nid_t nid; + struct page *page; + + /* First, try getting the desired direct node. */ + nid = get_nid(parent, start, false); + if (!nid) + return ERR_PTR(-ENOENT); + + page = find_get_page(mapping, nid); + if (page && PageUptodate(page)) + goto page_hit; + f2fs_put_page(page, 0); + +repeat: + page = grab_cache_page(mapping, nid); + if (!page) + return ERR_PTR(-ENOMEM); + + err = read_node_page(page, READA); + if (err) { + f2fs_put_page(page, 1); + return ERR_PTR(err); + } + + /* Then, try readahead for siblings of the desired node */ + end = start + MAX_RA_NODE; + end = min(end, NIDS_PER_BLOCK); + for (i = start + 1; i < end; i++) { + nid = get_nid(parent, i, false); + if (!nid) + continue; + ra_node_page(sbi, nid); + } + +page_hit: + lock_page(page); + if (PageError(page)) { + f2fs_put_page(page, 1); + return ERR_PTR(-EIO); + } + + /* Has the page been truncated? */ + if (page->mapping != mapping) { + f2fs_put_page(page, 1); + goto repeat; + } + return page; +} + +void sync_inode_page(struct dnode_of_data *dn) +{ + if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { + update_inode(dn->inode, dn->node_page); + } else if (dn->inode_page) { + if (!dn->inode_page_locked) + lock_page(dn->inode_page); + update_inode(dn->inode, dn->inode_page); + if (!dn->inode_page_locked) + unlock_page(dn->inode_page); + } else { + f2fs_write_inode(dn->inode, NULL); + } +} + +int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino, + struct writeback_control *wbc) +{ + struct address_space *mapping = sbi->node_inode->i_mapping; + pgoff_t index, end; + struct pagevec pvec; + int step = ino ? 2 : 0; + int nwritten = 0, wrote = 0; + + pagevec_init(&pvec, 0); + +next_step: + index = 0; + end = LONG_MAX; + + while (index <= end) { + int i, nr_pages; + nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, + PAGECACHE_TAG_DIRTY, + min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); + if (nr_pages == 0) + break; + + for (i = 0; i < nr_pages; i++) { + struct page *page = pvec.pages[i]; + + /* + * flushing sequence with step: + * 0. indirect nodes + * 1. dentry dnodes + * 2. file dnodes + */ + if (step == 0 && IS_DNODE(page)) + continue; + if (step == 1 && (!IS_DNODE(page) || + is_cold_node(page))) + continue; + if (step == 2 && (!IS_DNODE(page) || + !is_cold_node(page))) + continue; + + /* + * If an fsync mode, + * we should not skip writing node pages. + */ + if (ino && ino_of_node(page) == ino) + lock_page(page); + else if (!trylock_page(page)) + continue; + + if (unlikely(page->mapping != mapping)) { +continue_unlock: + unlock_page(page); + continue; + } + if (ino && ino_of_node(page) != ino) + goto continue_unlock; + + if (!PageDirty(page)) { + /* someone wrote it for us */ + goto continue_unlock; + } + + if (!clear_page_dirty_for_io(page)) + goto continue_unlock; + + /* called by fsync() */ + if (ino && IS_DNODE(page)) { + int mark = !is_checkpointed_node(sbi, ino); + set_fsync_mark(page, 1); + if (IS_INODE(page)) + set_dentry_mark(page, mark); + nwritten++; + } else { + set_fsync_mark(page, 0); + set_dentry_mark(page, 0); + } + mapping->a_ops->writepage(page, wbc); + wrote++; + + if (--wbc->nr_to_write == 0) + break; + } + pagevec_release(&pvec); + cond_resched(); + + if (wbc->nr_to_write == 0) { + step = 2; + break; + } + } + + if (step < 2) { + step++; + goto next_step; + } + + if (wrote) + f2fs_submit_bio(sbi, NODE, wbc->sync_mode == WB_SYNC_ALL); + + return nwritten; +} + +static int f2fs_write_node_page(struct page *page, + struct writeback_control *wbc) +{ + struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); + nid_t nid; + block_t new_addr; + struct node_info ni; + + if (wbc->for_reclaim) { + dec_page_count(sbi, F2FS_DIRTY_NODES); + wbc->pages_skipped++; + set_page_dirty(page); + return AOP_WRITEPAGE_ACTIVATE; + } + + wait_on_page_writeback(page); + + mutex_lock_op(sbi, NODE_WRITE); + + /* get old block addr of this node page */ + nid = nid_of_node(page); + BUG_ON(page->index != nid); + + get_node_info(sbi, nid, &ni); + + /* This page is already truncated */ + if (ni.blk_addr == NULL_ADDR) + return 0; + + set_page_writeback(page); + + /* insert node offset */ + write_node_page(sbi, page, nid, ni.blk_addr, &new_addr); + set_node_addr(sbi, &ni, new_addr); + dec_page_count(sbi, F2FS_DIRTY_NODES); + + mutex_unlock_op(sbi, NODE_WRITE); + unlock_page(page); + return 0; +} + +/* + * It is very important to gather dirty pages and write at once, so that we can + * submit a big bio without interfering other data writes. + * Be default, 512 pages (2MB), a segment size, is quite reasonable. + */ +#define COLLECT_DIRTY_NODES 512 +static int f2fs_write_node_pages(struct address_space *mapping, + struct writeback_control *wbc) +{ + struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); + struct block_device *bdev = sbi->sb->s_bdev; + long nr_to_write = wbc->nr_to_write; + + /* First check balancing cached NAT entries */ + if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK)) { + write_checkpoint(sbi, false, false); + return 0; + } + + /* collect a number of dirty node pages and write together */ + if (get_pages(sbi, F2FS_DIRTY_NODES) < COLLECT_DIRTY_NODES) + return 0; + + /* if mounting is failed, skip writing node pages */ + wbc->nr_to_write = bio_get_nr_vecs(bdev); + sync_node_pages(sbi, 0, wbc); + wbc->nr_to_write = nr_to_write - + (bio_get_nr_vecs(bdev) - wbc->nr_to_write); + return 0; +} + +static int f2fs_set_node_page_dirty(struct page *page) +{ + struct address_space *mapping = page->mapping; + struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); + + SetPageUptodate(page); + if (!PageDirty(page)) { + __set_page_dirty_nobuffers(page); + inc_page_count(sbi, F2FS_DIRTY_NODES); + SetPagePrivate(page); + return 1; + } + return 0; +} + +static void f2fs_invalidate_node_page(struct page *page, unsigned long offset) +{ + struct inode *inode = page->mapping->host; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + if (PageDirty(page)) + dec_page_count(sbi, F2FS_DIRTY_NODES); + ClearPagePrivate(page); +} + +static int f2fs_release_node_page(struct page *page, gfp_t wait) +{ + ClearPagePrivate(page); + return 0; +} + +/* + * Structure of the f2fs node operations + */ +const struct address_space_operations f2fs_node_aops = { + .writepage = f2fs_write_node_page, + .writepages = f2fs_write_node_pages, + .set_page_dirty = f2fs_set_node_page_dirty, + .invalidatepage = f2fs_invalidate_node_page, + .releasepage = f2fs_release_node_page, +}; + +static struct free_nid *__lookup_free_nid_list(nid_t n, struct list_head *head) +{ + struct list_head *this; + struct free_nid *i = NULL; + list_for_each(this, head) { + i = list_entry(this, struct free_nid, list); + if (i->nid == n) + break; + i = NULL; + } + return i; +} + +static void __del_from_free_nid_list(struct free_nid *i) +{ + list_del(&i->list); + kmem_cache_free(free_nid_slab, i); +} + +static int add_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) +{ + struct free_nid *i; + + if (nm_i->fcnt > 2 * MAX_FREE_NIDS) + return 0; +retry: + i = kmem_cache_alloc(free_nid_slab, GFP_NOFS); + if (!i) { + cond_resched(); + goto retry; + } + i->nid = nid; + i->state = NID_NEW; + + spin_lock(&nm_i->free_nid_list_lock); + if (__lookup_free_nid_list(nid, &nm_i->free_nid_list)) { + spin_unlock(&nm_i->free_nid_list_lock); + kmem_cache_free(free_nid_slab, i); + return 0; + } + list_add_tail(&i->list, &nm_i->free_nid_list); + nm_i->fcnt++; + spin_unlock(&nm_i->free_nid_list_lock); + return 1; +} + +static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid) +{ + struct free_nid *i; + spin_lock(&nm_i->free_nid_list_lock); + i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); + if (i && i->state == NID_NEW) { + __del_from_free_nid_list(i); + nm_i->fcnt--; + } + spin_unlock(&nm_i->free_nid_list_lock); +} + +static int scan_nat_page(struct f2fs_nm_info *nm_i, + struct page *nat_page, nid_t start_nid) +{ + struct f2fs_nat_block *nat_blk = page_address(nat_page); + block_t blk_addr; + int fcnt = 0; + int i; + + /* 0 nid should not be used */ + if (start_nid == 0) + ++start_nid; + + i = start_nid % NAT_ENTRY_PER_BLOCK; + + for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) { + blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); + BUG_ON(blk_addr == NEW_ADDR); + if (blk_addr == NULL_ADDR) + fcnt += add_free_nid(nm_i, start_nid); + } + return fcnt; +} + +static void build_free_nids(struct f2fs_sb_info *sbi) +{ + struct free_nid *fnid, *next_fnid; + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); + struct f2fs_summary_block *sum = curseg->sum_blk; + nid_t nid = 0; + bool is_cycled = false; + int fcnt = 0; + int i; + + nid = nm_i->next_scan_nid; + nm_i->init_scan_nid = nid; + + ra_nat_pages(sbi, nid); + + while (1) { + struct page *page = get_current_nat_page(sbi, nid); + + fcnt += scan_nat_page(nm_i, page, nid); + f2fs_put_page(page, 1); + + nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); + + if (nid >= nm_i->max_nid) { + nid = 0; + is_cycled = true; + } + if (fcnt > MAX_FREE_NIDS) + break; + if (is_cycled && nm_i->init_scan_nid <= nid) + break; + } + + nm_i->next_scan_nid = nid; + + /* find free nids from current sum_pages */ + mutex_lock(&curseg->curseg_mutex); + for (i = 0; i < nats_in_cursum(sum); i++) { + block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr); + nid = le32_to_cpu(nid_in_journal(sum, i)); + if (addr == NULL_ADDR) + add_free_nid(nm_i, nid); + else + remove_free_nid(nm_i, nid); + } + mutex_unlock(&curseg->curseg_mutex); + + /* remove the free nids from current allocated nids */ + list_for_each_entry_safe(fnid, next_fnid, &nm_i->free_nid_list, list) { + struct nat_entry *ne; + + read_lock(&nm_i->nat_tree_lock); + ne = __lookup_nat_cache(nm_i, fnid->nid); + if (ne && nat_get_blkaddr(ne) != NULL_ADDR) + remove_free_nid(nm_i, fnid->nid); + read_unlock(&nm_i->nat_tree_lock); + } +} + +/* + * If this function returns success, caller can obtain a new nid + * from second parameter of this function. + * The returned nid could be used ino as well as nid when inode is created. + */ +bool alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct free_nid *i = NULL; + struct list_head *this; +retry: + mutex_lock(&nm_i->build_lock); + if (!nm_i->fcnt) { + /* scan NAT in order to build free nid list */ + build_free_nids(sbi); + if (!nm_i->fcnt) { + mutex_unlock(&nm_i->build_lock); + return false; + } + } + mutex_unlock(&nm_i->build_lock); + + /* + * We check fcnt again since previous check is racy as + * we didn't hold free_nid_list_lock. So other thread + * could consume all of free nids. + */ + spin_lock(&nm_i->free_nid_list_lock); + if (!nm_i->fcnt) { + spin_unlock(&nm_i->free_nid_list_lock); + goto retry; + } + + BUG_ON(list_empty(&nm_i->free_nid_list)); + list_for_each(this, &nm_i->free_nid_list) { + i = list_entry(this, struct free_nid, list); + if (i->state == NID_NEW) + break; + } + + BUG_ON(i->state != NID_NEW); + *nid = i->nid; + i->state = NID_ALLOC; + nm_i->fcnt--; + spin_unlock(&nm_i->free_nid_list_lock); + return true; +} + +/* + * alloc_nid() should be called prior to this function. + */ +void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct free_nid *i; + + spin_lock(&nm_i->free_nid_list_lock); + i = __lookup_free_nid_list(nid, &nm_i->free_nid_list); + if (i) { + BUG_ON(i->state != NID_ALLOC); + __del_from_free_nid_list(i); + } + spin_unlock(&nm_i->free_nid_list_lock); +} + +/* + * alloc_nid() should be called prior to this function. + */ +void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid) +{ + alloc_nid_done(sbi, nid); + add_free_nid(NM_I(sbi), nid); +} + +void recover_node_page(struct f2fs_sb_info *sbi, struct page *page, + struct f2fs_summary *sum, struct node_info *ni, + block_t new_blkaddr) +{ + rewrite_node_page(sbi, page, sum, ni->blk_addr, new_blkaddr); + set_node_addr(sbi, ni, new_blkaddr); + clear_node_page_dirty(page); +} + +int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) +{ + struct address_space *mapping = sbi->node_inode->i_mapping; + struct f2fs_node *src, *dst; + nid_t ino = ino_of_node(page); + struct node_info old_ni, new_ni; + struct page *ipage; + + ipage = grab_cache_page(mapping, ino); + if (!ipage) + return -ENOMEM; + + /* Should not use this inode from free nid list */ + remove_free_nid(NM_I(sbi), ino); + + get_node_info(sbi, ino, &old_ni); + SetPageUptodate(ipage); + fill_node_footer(ipage, ino, ino, 0, true); + + src = (struct f2fs_node *)page_address(page); + dst = (struct f2fs_node *)page_address(ipage); + + memcpy(dst, src, (unsigned long)&src->i.i_ext - (unsigned long)&src->i); + dst->i.i_size = 0; + dst->i.i_blocks = cpu_to_le64(1); + dst->i.i_links = cpu_to_le32(1); + dst->i.i_xattr_nid = 0; + + new_ni = old_ni; + new_ni.ino = ino; + + set_node_addr(sbi, &new_ni, NEW_ADDR); + inc_valid_inode_count(sbi); + + f2fs_put_page(ipage, 1); + return 0; +} + +int restore_node_summary(struct f2fs_sb_info *sbi, + unsigned int segno, struct f2fs_summary_block *sum) +{ + struct f2fs_node *rn; + struct f2fs_summary *sum_entry; + struct page *page; + block_t addr; + int i, last_offset; + + /* alloc temporal page for read node */ + page = alloc_page(GFP_NOFS | __GFP_ZERO); + if (IS_ERR(page)) + return PTR_ERR(page); + lock_page(page); + + /* scan the node segment */ + last_offset = sbi->blocks_per_seg; + addr = START_BLOCK(sbi, segno); + sum_entry = &sum->entries[0]; + + for (i = 0; i < last_offset; i++, sum_entry++) { + if (f2fs_readpage(sbi, page, addr, READ_SYNC)) + goto out; + + rn = (struct f2fs_node *)page_address(page); + sum_entry->nid = rn->footer.nid; + sum_entry->version = 0; + sum_entry->ofs_in_node = 0; + addr++; + + /* + * In order to read next node page, + * we must clear PageUptodate flag. + */ + ClearPageUptodate(page); + } +out: + unlock_page(page); + __free_pages(page, 0); + return 0; +} + +static bool flush_nats_in_journal(struct f2fs_sb_info *sbi) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); + struct f2fs_summary_block *sum = curseg->sum_blk; + int i; + + mutex_lock(&curseg->curseg_mutex); + + if (nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) { + mutex_unlock(&curseg->curseg_mutex); + return false; + } + + for (i = 0; i < nats_in_cursum(sum); i++) { + struct nat_entry *ne; + struct f2fs_nat_entry raw_ne; + nid_t nid = le32_to_cpu(nid_in_journal(sum, i)); + + raw_ne = nat_in_journal(sum, i); +retry: + write_lock(&nm_i->nat_tree_lock); + ne = __lookup_nat_cache(nm_i, nid); + if (ne) { + __set_nat_cache_dirty(nm_i, ne); + write_unlock(&nm_i->nat_tree_lock); + continue; + } + ne = grab_nat_entry(nm_i, nid); + if (!ne) { + write_unlock(&nm_i->nat_tree_lock); + goto retry; + } + nat_set_blkaddr(ne, le32_to_cpu(raw_ne.block_addr)); + nat_set_ino(ne, le32_to_cpu(raw_ne.ino)); + nat_set_version(ne, raw_ne.version); + __set_nat_cache_dirty(nm_i, ne); + write_unlock(&nm_i->nat_tree_lock); + } + update_nats_in_cursum(sum, -i); + mutex_unlock(&curseg->curseg_mutex); + return true; +} + +/* + * This function is called during the checkpointing process. + */ +void flush_nat_entries(struct f2fs_sb_info *sbi) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_HOT_DATA); + struct f2fs_summary_block *sum = curseg->sum_blk; + struct list_head *cur, *n; + struct page *page = NULL; + struct f2fs_nat_block *nat_blk = NULL; + nid_t start_nid = 0, end_nid = 0; + bool flushed; + + flushed = flush_nats_in_journal(sbi); + + if (!flushed) + mutex_lock(&curseg->curseg_mutex); + + /* 1) flush dirty nat caches */ + list_for_each_safe(cur, n, &nm_i->dirty_nat_entries) { + struct nat_entry *ne; + nid_t nid; + struct f2fs_nat_entry raw_ne; + int offset = -1; + block_t new_blkaddr; + + ne = list_entry(cur, struct nat_entry, list); + nid = nat_get_nid(ne); + + if (nat_get_blkaddr(ne) == NEW_ADDR) + continue; + if (flushed) + goto to_nat_page; + + /* if there is room for nat enries in curseg->sumpage */ + offset = lookup_journal_in_cursum(sum, NAT_JOURNAL, nid, 1); + if (offset >= 0) { + raw_ne = nat_in_journal(sum, offset); + goto flush_now; + } +to_nat_page: + if (!page || (start_nid > nid || nid > end_nid)) { + if (page) { + f2fs_put_page(page, 1); + page = NULL; + } + start_nid = START_NID(nid); + end_nid = start_nid + NAT_ENTRY_PER_BLOCK - 1; + + /* + * get nat block with dirty flag, increased reference + * count, mapped and lock + */ + page = get_next_nat_page(sbi, start_nid); + nat_blk = page_address(page); + } + + BUG_ON(!nat_blk); + raw_ne = nat_blk->entries[nid - start_nid]; +flush_now: + new_blkaddr = nat_get_blkaddr(ne); + + raw_ne.ino = cpu_to_le32(nat_get_ino(ne)); + raw_ne.block_addr = cpu_to_le32(new_blkaddr); + raw_ne.version = nat_get_version(ne); + + if (offset < 0) { + nat_blk->entries[nid - start_nid] = raw_ne; + } else { + nat_in_journal(sum, offset) = raw_ne; + nid_in_journal(sum, offset) = cpu_to_le32(nid); + } + + if (nat_get_blkaddr(ne) == NULL_ADDR) { + write_lock(&nm_i->nat_tree_lock); + __del_from_nat_cache(nm_i, ne); + write_unlock(&nm_i->nat_tree_lock); + + /* We can reuse this freed nid at this point */ + add_free_nid(NM_I(sbi), nid); + } else { + write_lock(&nm_i->nat_tree_lock); + __clear_nat_cache_dirty(nm_i, ne); + ne->checkpointed = true; + write_unlock(&nm_i->nat_tree_lock); + } + } + if (!flushed) + mutex_unlock(&curseg->curseg_mutex); + f2fs_put_page(page, 1); + + /* 2) shrink nat caches if necessary */ + try_to_free_nats(sbi, nm_i->nat_cnt - NM_WOUT_THRESHOLD); +} + +static int init_node_manager(struct f2fs_sb_info *sbi) +{ + struct f2fs_super_block *sb_raw = F2FS_RAW_SUPER(sbi); + struct f2fs_nm_info *nm_i = NM_I(sbi); + unsigned char *version_bitmap; + unsigned int nat_segs, nat_blocks; + + nm_i->nat_blkaddr = le32_to_cpu(sb_raw->nat_blkaddr); + + /* segment_count_nat includes pair segment so divide to 2. */ + nat_segs = le32_to_cpu(sb_raw->segment_count_nat) >> 1; + nat_blocks = nat_segs << le32_to_cpu(sb_raw->log_blocks_per_seg); + nm_i->max_nid = NAT_ENTRY_PER_BLOCK * nat_blocks; + nm_i->fcnt = 0; + nm_i->nat_cnt = 0; + + INIT_LIST_HEAD(&nm_i->free_nid_list); + INIT_RADIX_TREE(&nm_i->nat_root, GFP_ATOMIC); + INIT_LIST_HEAD(&nm_i->nat_entries); + INIT_LIST_HEAD(&nm_i->dirty_nat_entries); + + mutex_init(&nm_i->build_lock); + spin_lock_init(&nm_i->free_nid_list_lock); + rwlock_init(&nm_i->nat_tree_lock); + + nm_i->bitmap_size = __bitmap_size(sbi, NAT_BITMAP); + nm_i->init_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); + nm_i->next_scan_nid = le32_to_cpu(sbi->ckpt->next_free_nid); + + nm_i->nat_bitmap = kzalloc(nm_i->bitmap_size, GFP_KERNEL); + if (!nm_i->nat_bitmap) + return -ENOMEM; + version_bitmap = __bitmap_ptr(sbi, NAT_BITMAP); + if (!version_bitmap) + return -EFAULT; + + /* copy version bitmap */ + memcpy(nm_i->nat_bitmap, version_bitmap, nm_i->bitmap_size); + return 0; +} + +int build_node_manager(struct f2fs_sb_info *sbi) +{ + int err; + + sbi->nm_info = kzalloc(sizeof(struct f2fs_nm_info), GFP_KERNEL); + if (!sbi->nm_info) + return -ENOMEM; + + err = init_node_manager(sbi); + if (err) + return err; + + build_free_nids(sbi); + return 0; +} + +void destroy_node_manager(struct f2fs_sb_info *sbi) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct free_nid *i, *next_i; + struct nat_entry *natvec[NATVEC_SIZE]; + nid_t nid = 0; + unsigned int found; + + if (!nm_i) + return; + + /* destroy free nid list */ + spin_lock(&nm_i->free_nid_list_lock); + list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) { + BUG_ON(i->state == NID_ALLOC); + __del_from_free_nid_list(i); + nm_i->fcnt--; + } + BUG_ON(nm_i->fcnt); + spin_unlock(&nm_i->free_nid_list_lock); + + /* destroy nat cache */ + write_lock(&nm_i->nat_tree_lock); + while ((found = __gang_lookup_nat_cache(nm_i, + nid, NATVEC_SIZE, natvec))) { + unsigned idx; + for (idx = 0; idx < found; idx++) { + struct nat_entry *e = natvec[idx]; + nid = nat_get_nid(e) + 1; + __del_from_nat_cache(nm_i, e); + } + } + BUG_ON(nm_i->nat_cnt); + write_unlock(&nm_i->nat_tree_lock); + + kfree(nm_i->nat_bitmap); + sbi->nm_info = NULL; + kfree(nm_i); +} + +int __init create_node_manager_caches(void) +{ + nat_entry_slab = f2fs_kmem_cache_create("nat_entry", + sizeof(struct nat_entry), NULL); + if (!nat_entry_slab) + return -ENOMEM; + + free_nid_slab = f2fs_kmem_cache_create("free_nid", + sizeof(struct free_nid), NULL); + if (!free_nid_slab) { + kmem_cache_destroy(nat_entry_slab); + return -ENOMEM; + } + return 0; +} + +void destroy_node_manager_caches(void) +{ + kmem_cache_destroy(free_nid_slab); + kmem_cache_destroy(nat_entry_slab); +} diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h new file mode 100644 index 00000000000..afdb130f782 --- /dev/null +++ b/fs/f2fs/node.h @@ -0,0 +1,353 @@ +/* + * fs/f2fs/node.h + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +/* start node id of a node block dedicated to the given node id */ +#define START_NID(nid) ((nid / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK) + +/* node block offset on the NAT area dedicated to the given start node id */ +#define NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK) + +/* # of pages to perform readahead before building free nids */ +#define FREE_NID_PAGES 4 + +/* maximum # of free node ids to produce during build_free_nids */ +#define MAX_FREE_NIDS (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES) + +/* maximum readahead size for node during getting data blocks */ +#define MAX_RA_NODE 128 + +/* maximum cached nat entries to manage memory footprint */ +#define NM_WOUT_THRESHOLD (64 * NAT_ENTRY_PER_BLOCK) + +/* vector size for gang look-up from nat cache that consists of radix tree */ +#define NATVEC_SIZE 64 + +/* + * For node information + */ +struct node_info { + nid_t nid; /* node id */ + nid_t ino; /* inode number of the node's owner */ + block_t blk_addr; /* block address of the node */ + unsigned char version; /* version of the node */ +}; + +struct nat_entry { + struct list_head list; /* for clean or dirty nat list */ + bool checkpointed; /* whether it is checkpointed or not */ + struct node_info ni; /* in-memory node information */ +}; + +#define nat_get_nid(nat) (nat->ni.nid) +#define nat_set_nid(nat, n) (nat->ni.nid = n) +#define nat_get_blkaddr(nat) (nat->ni.blk_addr) +#define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b) +#define nat_get_ino(nat) (nat->ni.ino) +#define nat_set_ino(nat, i) (nat->ni.ino = i) +#define nat_get_version(nat) (nat->ni.version) +#define nat_set_version(nat, v) (nat->ni.version = v) + +#define __set_nat_cache_dirty(nm_i, ne) \ + list_move_tail(&ne->list, &nm_i->dirty_nat_entries); +#define __clear_nat_cache_dirty(nm_i, ne) \ + list_move_tail(&ne->list, &nm_i->nat_entries); +#define inc_node_version(version) (++version) + +static inline void node_info_from_raw_nat(struct node_info *ni, + struct f2fs_nat_entry *raw_ne) +{ + ni->ino = le32_to_cpu(raw_ne->ino); + ni->blk_addr = le32_to_cpu(raw_ne->block_addr); + ni->version = raw_ne->version; +} + +/* + * For free nid mangement + */ +enum nid_state { + NID_NEW, /* newly added to free nid list */ + NID_ALLOC /* it is allocated */ +}; + +struct free_nid { + struct list_head list; /* for free node id list */ + nid_t nid; /* node id */ + int state; /* in use or not: NID_NEW or NID_ALLOC */ +}; + +static inline int next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + struct free_nid *fnid; + + if (nm_i->fcnt <= 0) + return -1; + spin_lock(&nm_i->free_nid_list_lock); + fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list); + *nid = fnid->nid; + spin_unlock(&nm_i->free_nid_list_lock); + return 0; +} + +/* + * inline functions + */ +static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size); +} + +static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + pgoff_t block_off; + pgoff_t block_addr; + int seg_off; + + block_off = NAT_BLOCK_OFFSET(start); + seg_off = block_off >> sbi->log_blocks_per_seg; + + block_addr = (pgoff_t)(nm_i->nat_blkaddr + + (seg_off << sbi->log_blocks_per_seg << 1) + + (block_off & ((1 << sbi->log_blocks_per_seg) - 1))); + + if (f2fs_test_bit(block_off, nm_i->nat_bitmap)) + block_addr += sbi->blocks_per_seg; + + return block_addr; +} + +static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi, + pgoff_t block_addr) +{ + struct f2fs_nm_info *nm_i = NM_I(sbi); + + block_addr -= nm_i->nat_blkaddr; + if ((block_addr >> sbi->log_blocks_per_seg) % 2) + block_addr -= sbi->blocks_per_seg; + else + block_addr += sbi->blocks_per_seg; + + return block_addr + nm_i->nat_blkaddr; +} + +static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid) +{ + unsigned int block_off = NAT_BLOCK_OFFSET(start_nid); + + if (f2fs_test_bit(block_off, nm_i->nat_bitmap)) + f2fs_clear_bit(block_off, nm_i->nat_bitmap); + else + f2fs_set_bit(block_off, nm_i->nat_bitmap); +} + +static inline void fill_node_footer(struct page *page, nid_t nid, + nid_t ino, unsigned int ofs, bool reset) +{ + void *kaddr = page_address(page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + if (reset) + memset(rn, 0, sizeof(*rn)); + rn->footer.nid = cpu_to_le32(nid); + rn->footer.ino = cpu_to_le32(ino); + rn->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT); +} + +static inline void copy_node_footer(struct page *dst, struct page *src) +{ + void *src_addr = page_address(src); + void *dst_addr = page_address(dst); + struct f2fs_node *src_rn = (struct f2fs_node *)src_addr; + struct f2fs_node *dst_rn = (struct f2fs_node *)dst_addr; + memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer)); +} + +static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr) +{ + struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + void *kaddr = page_address(page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + rn->footer.cp_ver = ckpt->checkpoint_ver; + rn->footer.next_blkaddr = cpu_to_le32(blkaddr); +} + +static inline nid_t ino_of_node(struct page *node_page) +{ + void *kaddr = page_address(node_page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + return le32_to_cpu(rn->footer.ino); +} + +static inline nid_t nid_of_node(struct page *node_page) +{ + void *kaddr = page_address(node_page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + return le32_to_cpu(rn->footer.nid); +} + +static inline unsigned int ofs_of_node(struct page *node_page) +{ + void *kaddr = page_address(node_page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + unsigned flag = le32_to_cpu(rn->footer.flag); + return flag >> OFFSET_BIT_SHIFT; +} + +static inline unsigned long long cpver_of_node(struct page *node_page) +{ + void *kaddr = page_address(node_page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + return le64_to_cpu(rn->footer.cp_ver); +} + +static inline block_t next_blkaddr_of_node(struct page *node_page) +{ + void *kaddr = page_address(node_page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + return le32_to_cpu(rn->footer.next_blkaddr); +} + +/* + * f2fs assigns the following node offsets described as (num). + * N = NIDS_PER_BLOCK + * + * Inode block (0) + * |- direct node (1) + * |- direct node (2) + * |- indirect node (3) + * | `- direct node (4 => 4 + N - 1) + * |- indirect node (4 + N) + * | `- direct node (5 + N => 5 + 2N - 1) + * `- double indirect node (5 + 2N) + * `- indirect node (6 + 2N) + * `- direct node (x(N + 1)) + */ +static inline bool IS_DNODE(struct page *node_page) +{ + unsigned int ofs = ofs_of_node(node_page); + if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK || + ofs == 5 + 2 * NIDS_PER_BLOCK) + return false; + if (ofs >= 6 + 2 * NIDS_PER_BLOCK) { + ofs -= 6 + 2 * NIDS_PER_BLOCK; + if ((long int)ofs % (NIDS_PER_BLOCK + 1)) + return false; + } + return true; +} + +static inline void set_nid(struct page *p, int off, nid_t nid, bool i) +{ + struct f2fs_node *rn = (struct f2fs_node *)page_address(p); + + wait_on_page_writeback(p); + + if (i) + rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid); + else + rn->in.nid[off] = cpu_to_le32(nid); + set_page_dirty(p); +} + +static inline nid_t get_nid(struct page *p, int off, bool i) +{ + struct f2fs_node *rn = (struct f2fs_node *)page_address(p); + if (i) + return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]); + return le32_to_cpu(rn->in.nid[off]); +} + +/* + * Coldness identification: + * - Mark cold files in f2fs_inode_info + * - Mark cold node blocks in their node footer + * - Mark cold data pages in page cache + */ +static inline int is_cold_file(struct inode *inode) +{ + return F2FS_I(inode)->i_advise & FADVISE_COLD_BIT; +} + +static inline int is_cold_data(struct page *page) +{ + return PageChecked(page); +} + +static inline void set_cold_data(struct page *page) +{ + SetPageChecked(page); +} + +static inline void clear_cold_data(struct page *page) +{ + ClearPageChecked(page); +} + +static inline int is_cold_node(struct page *page) +{ + void *kaddr = page_address(page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + unsigned int flag = le32_to_cpu(rn->footer.flag); + return flag & (0x1 << COLD_BIT_SHIFT); +} + +static inline unsigned char is_fsync_dnode(struct page *page) +{ + void *kaddr = page_address(page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + unsigned int flag = le32_to_cpu(rn->footer.flag); + return flag & (0x1 << FSYNC_BIT_SHIFT); +} + +static inline unsigned char is_dent_dnode(struct page *page) +{ + void *kaddr = page_address(page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + unsigned int flag = le32_to_cpu(rn->footer.flag); + return flag & (0x1 << DENT_BIT_SHIFT); +} + +static inline void set_cold_node(struct inode *inode, struct page *page) +{ + struct f2fs_node *rn = (struct f2fs_node *)page_address(page); + unsigned int flag = le32_to_cpu(rn->footer.flag); + + if (S_ISDIR(inode->i_mode)) + flag &= ~(0x1 << COLD_BIT_SHIFT); + else + flag |= (0x1 << COLD_BIT_SHIFT); + rn->footer.flag = cpu_to_le32(flag); +} + +static inline void set_fsync_mark(struct page *page, int mark) +{ + void *kaddr = page_address(page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + unsigned int flag = le32_to_cpu(rn->footer.flag); + if (mark) + flag |= (0x1 << FSYNC_BIT_SHIFT); + else + flag &= ~(0x1 << FSYNC_BIT_SHIFT); + rn->footer.flag = cpu_to_le32(flag); +} + +static inline void set_dentry_mark(struct page *page, int mark) +{ + void *kaddr = page_address(page); + struct f2fs_node *rn = (struct f2fs_node *)kaddr; + unsigned int flag = le32_to_cpu(rn->footer.flag); + if (mark) + flag |= (0x1 << DENT_BIT_SHIFT); + else + flag &= ~(0x1 << DENT_BIT_SHIFT); + rn->footer.flag = cpu_to_le32(flag); +} diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c new file mode 100644 index 00000000000..f42e4060b39 --- /dev/null +++ b/fs/f2fs/recovery.c @@ -0,0 +1,377 @@ +/* + * fs/f2fs/recovery.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include "f2fs.h" +#include "node.h" +#include "segment.h" + +static struct kmem_cache *fsync_entry_slab; + +bool space_for_roll_forward(struct f2fs_sb_info *sbi) +{ + if (sbi->last_valid_block_count + sbi->alloc_valid_block_count + > sbi->user_block_count) + return false; + return true; +} + +static struct fsync_inode_entry *get_fsync_inode(struct list_head *head, + nid_t ino) +{ + struct list_head *this; + struct fsync_inode_entry *entry; + + list_for_each(this, head) { + entry = list_entry(this, struct fsync_inode_entry, list); + if (entry->inode->i_ino == ino) + return entry; + } + return NULL; +} + +static int recover_dentry(struct page *ipage, struct inode *inode) +{ + struct f2fs_node *raw_node = (struct f2fs_node *)kmap(ipage); + struct f2fs_inode *raw_inode = &(raw_node->i); + struct dentry dent, parent; + struct f2fs_dir_entry *de; + struct page *page; + struct inode *dir; + int err = 0; + + if (!is_dent_dnode(ipage)) + goto out; + + dir = f2fs_iget(inode->i_sb, le32_to_cpu(raw_inode->i_pino)); + if (IS_ERR(dir)) { + err = -EINVAL; + goto out; + } + + parent.d_inode = dir; + dent.d_parent = &parent; + dent.d_name.len = le32_to_cpu(raw_inode->i_namelen); + dent.d_name.name = raw_inode->i_name; + + de = f2fs_find_entry(dir, &dent.d_name, &page); + if (de) { + kunmap(page); + f2fs_put_page(page, 0); + } else { + err = f2fs_add_link(&dent, inode); + } + iput(dir); +out: + kunmap(ipage); + return err; +} + +static int recover_inode(struct inode *inode, struct page *node_page) +{ + void *kaddr = page_address(node_page); + struct f2fs_node *raw_node = (struct f2fs_node *)kaddr; + struct f2fs_inode *raw_inode = &(raw_node->i); + + inode->i_mode = le16_to_cpu(raw_inode->i_mode); + i_size_write(inode, le64_to_cpu(raw_inode->i_size)); + inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); + inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); + inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); + inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); + inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); + inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); + + return recover_dentry(node_page, inode); +} + +static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head) +{ + unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver); + struct curseg_info *curseg; + struct page *page; + block_t blkaddr; + int err = 0; + + /* get node pages in the current segment */ + curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); + blkaddr = START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff; + + /* read node page */ + page = alloc_page(GFP_F2FS_ZERO); + if (IS_ERR(page)) + return PTR_ERR(page); + lock_page(page); + + while (1) { + struct fsync_inode_entry *entry; + + if (f2fs_readpage(sbi, page, blkaddr, READ_SYNC)) + goto out; + + if (cp_ver != cpver_of_node(page)) + goto out; + + if (!is_fsync_dnode(page)) + goto next; + + entry = get_fsync_inode(head, ino_of_node(page)); + if (entry) { + entry->blkaddr = blkaddr; + if (IS_INODE(page) && is_dent_dnode(page)) + set_inode_flag(F2FS_I(entry->inode), + FI_INC_LINK); + } else { + if (IS_INODE(page) && is_dent_dnode(page)) { + if (recover_inode_page(sbi, page)) { + err = -ENOMEM; + goto out; + } + } + + /* add this fsync inode to the list */ + entry = kmem_cache_alloc(fsync_entry_slab, GFP_NOFS); + if (!entry) { + err = -ENOMEM; + goto out; + } + + entry->inode = f2fs_iget(sbi->sb, ino_of_node(page)); + if (IS_ERR(entry->inode)) { + err = PTR_ERR(entry->inode); + kmem_cache_free(fsync_entry_slab, entry); + goto out; + } + + list_add_tail(&entry->list, head); + entry->blkaddr = blkaddr; + } + if (IS_INODE(page)) { + err = recover_inode(entry->inode, page); + if (err) + goto out; + } +next: + /* check next segment */ + blkaddr = next_blkaddr_of_node(page); + ClearPageUptodate(page); + } +out: + unlock_page(page); + __free_pages(page, 0); + return err; +} + +static void destroy_fsync_dnodes(struct f2fs_sb_info *sbi, + struct list_head *head) +{ + struct fsync_inode_entry *entry, *tmp; + + list_for_each_entry_safe(entry, tmp, head, list) { + iput(entry->inode); + list_del(&entry->list); + kmem_cache_free(fsync_entry_slab, entry); + } +} + +static void check_index_in_prev_nodes(struct f2fs_sb_info *sbi, + block_t blkaddr) +{ + struct seg_entry *sentry; + unsigned int segno = GET_SEGNO(sbi, blkaddr); + unsigned short blkoff = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & + (sbi->blocks_per_seg - 1); + struct f2fs_summary sum; + nid_t ino; + void *kaddr; + struct inode *inode; + struct page *node_page; + block_t bidx; + int i; + + sentry = get_seg_entry(sbi, segno); + if (!f2fs_test_bit(blkoff, sentry->cur_valid_map)) + return; + + /* Get the previous summary */ + for (i = CURSEG_WARM_DATA; i <= CURSEG_COLD_DATA; i++) { + struct curseg_info *curseg = CURSEG_I(sbi, i); + if (curseg->segno == segno) { + sum = curseg->sum_blk->entries[blkoff]; + break; + } + } + if (i > CURSEG_COLD_DATA) { + struct page *sum_page = get_sum_page(sbi, segno); + struct f2fs_summary_block *sum_node; + kaddr = page_address(sum_page); + sum_node = (struct f2fs_summary_block *)kaddr; + sum = sum_node->entries[blkoff]; + f2fs_put_page(sum_page, 1); + } + + /* Get the node page */ + node_page = get_node_page(sbi, le32_to_cpu(sum.nid)); + bidx = start_bidx_of_node(ofs_of_node(node_page)) + + le16_to_cpu(sum.ofs_in_node); + ino = ino_of_node(node_page); + f2fs_put_page(node_page, 1); + + /* Deallocate previous index in the node page */ + inode = f2fs_iget_nowait(sbi->sb, ino); + if (IS_ERR(inode)) + return; + + truncate_hole(inode, bidx, bidx + 1); + iput(inode); +} + +static void do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, + struct page *page, block_t blkaddr) +{ + unsigned int start, end; + struct dnode_of_data dn; + struct f2fs_summary sum; + struct node_info ni; + + start = start_bidx_of_node(ofs_of_node(page)); + if (IS_INODE(page)) + end = start + ADDRS_PER_INODE; + else + end = start + ADDRS_PER_BLOCK; + + set_new_dnode(&dn, inode, NULL, NULL, 0); + if (get_dnode_of_data(&dn, start, 0)) + return; + + wait_on_page_writeback(dn.node_page); + + get_node_info(sbi, dn.nid, &ni); + BUG_ON(ni.ino != ino_of_node(page)); + BUG_ON(ofs_of_node(dn.node_page) != ofs_of_node(page)); + + for (; start < end; start++) { + block_t src, dest; + + src = datablock_addr(dn.node_page, dn.ofs_in_node); + dest = datablock_addr(page, dn.ofs_in_node); + + if (src != dest && dest != NEW_ADDR && dest != NULL_ADDR) { + if (src == NULL_ADDR) { + int err = reserve_new_block(&dn); + /* We should not get -ENOSPC */ + BUG_ON(err); + } + + /* Check the previous node page having this index */ + check_index_in_prev_nodes(sbi, dest); + + set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version); + + /* write dummy data page */ + recover_data_page(sbi, NULL, &sum, src, dest); + update_extent_cache(dest, &dn); + } + dn.ofs_in_node++; + } + + /* write node page in place */ + set_summary(&sum, dn.nid, 0, 0); + if (IS_INODE(dn.node_page)) + sync_inode_page(&dn); + + copy_node_footer(dn.node_page, page); + fill_node_footer(dn.node_page, dn.nid, ni.ino, + ofs_of_node(page), false); + set_page_dirty(dn.node_page); + + recover_node_page(sbi, dn.node_page, &sum, &ni, blkaddr); + f2fs_put_dnode(&dn); +} + +static void recover_data(struct f2fs_sb_info *sbi, + struct list_head *head, int type) +{ + unsigned long long cp_ver = le64_to_cpu(sbi->ckpt->checkpoint_ver); + struct curseg_info *curseg; + struct page *page; + block_t blkaddr; + + /* get node pages in the current segment */ + curseg = CURSEG_I(sbi, type); + blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); + + /* read node page */ + page = alloc_page(GFP_NOFS | __GFP_ZERO); + if (IS_ERR(page)) + return; + lock_page(page); + + while (1) { + struct fsync_inode_entry *entry; + + if (f2fs_readpage(sbi, page, blkaddr, READ_SYNC)) + goto out; + + if (cp_ver != cpver_of_node(page)) + goto out; + + entry = get_fsync_inode(head, ino_of_node(page)); + if (!entry) + goto next; + + do_recover_data(sbi, entry->inode, page, blkaddr); + + if (entry->blkaddr == blkaddr) { + iput(entry->inode); + list_del(&entry->list); + kmem_cache_free(fsync_entry_slab, entry); + } +next: + /* check next segment */ + blkaddr = next_blkaddr_of_node(page); + ClearPageUptodate(page); + } +out: + unlock_page(page); + __free_pages(page, 0); + + allocate_new_segments(sbi); +} + +void recover_fsync_data(struct f2fs_sb_info *sbi) +{ + struct list_head inode_list; + + fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry", + sizeof(struct fsync_inode_entry), NULL); + if (unlikely(!fsync_entry_slab)) + return; + + INIT_LIST_HEAD(&inode_list); + + /* step #1: find fsynced inode numbers */ + if (find_fsync_dnodes(sbi, &inode_list)) + goto out; + + if (list_empty(&inode_list)) + goto out; + + /* step #2: recover data */ + sbi->por_doing = 1; + recover_data(sbi, &inode_list, CURSEG_WARM_NODE); + sbi->por_doing = 0; + BUG_ON(!list_empty(&inode_list)); +out: + destroy_fsync_dnodes(sbi, &inode_list); + kmem_cache_destroy(fsync_entry_slab); + write_checkpoint(sbi, false, false); +} diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c new file mode 100644 index 00000000000..4b009906658 --- /dev/null +++ b/fs/f2fs/segment.c @@ -0,0 +1,1757 @@ +/* + * fs/f2fs/segment.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/f2fs_fs.h> +#include <linux/bio.h> +#include <linux/blkdev.h> +#include <linux/prefetch.h> +#include <linux/vmalloc.h> + +#include "f2fs.h" +#include "segment.h" +#include "node.h" + +/* + * This function balances dirty node and dentry pages. + * In addition, it controls garbage collection. + */ +void f2fs_balance_fs(struct f2fs_sb_info *sbi) +{ + /* + * We should do GC or end up with checkpoint, if there are so many dirty + * dir/node pages without enough free segments. + */ + if (has_not_enough_free_secs(sbi)) { + mutex_lock(&sbi->gc_mutex); + f2fs_gc(sbi); + } +} + +static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, + enum dirty_type dirty_type) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + + /* need not be added */ + if (IS_CURSEG(sbi, segno)) + return; + + if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) + dirty_i->nr_dirty[dirty_type]++; + + if (dirty_type == DIRTY) { + struct seg_entry *sentry = get_seg_entry(sbi, segno); + dirty_type = sentry->type; + if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) + dirty_i->nr_dirty[dirty_type]++; + } +} + +static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, + enum dirty_type dirty_type) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + + if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type])) + dirty_i->nr_dirty[dirty_type]--; + + if (dirty_type == DIRTY) { + struct seg_entry *sentry = get_seg_entry(sbi, segno); + dirty_type = sentry->type; + if (test_and_clear_bit(segno, + dirty_i->dirty_segmap[dirty_type])) + dirty_i->nr_dirty[dirty_type]--; + clear_bit(segno, dirty_i->victim_segmap[FG_GC]); + clear_bit(segno, dirty_i->victim_segmap[BG_GC]); + } +} + +/* + * Should not occur error such as -ENOMEM. + * Adding dirty entry into seglist is not critical operation. + * If a given segment is one of current working segments, it won't be added. + */ +void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + unsigned short valid_blocks; + + if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno)) + return; + + mutex_lock(&dirty_i->seglist_lock); + + valid_blocks = get_valid_blocks(sbi, segno, 0); + + if (valid_blocks == 0) { + __locate_dirty_segment(sbi, segno, PRE); + __remove_dirty_segment(sbi, segno, DIRTY); + } else if (valid_blocks < sbi->blocks_per_seg) { + __locate_dirty_segment(sbi, segno, DIRTY); + } else { + /* Recovery routine with SSR needs this */ + __remove_dirty_segment(sbi, segno, DIRTY); + } + + mutex_unlock(&dirty_i->seglist_lock); + return; +} + +/* + * Should call clear_prefree_segments after checkpoint is done. + */ +static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + unsigned int segno, offset = 0; + unsigned int total_segs = TOTAL_SEGS(sbi); + + mutex_lock(&dirty_i->seglist_lock); + while (1) { + segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs, + offset); + if (segno >= total_segs) + break; + __set_test_and_free(sbi, segno); + offset = segno + 1; + } + mutex_unlock(&dirty_i->seglist_lock); +} + +void clear_prefree_segments(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + unsigned int segno, offset = 0; + unsigned int total_segs = TOTAL_SEGS(sbi); + + mutex_lock(&dirty_i->seglist_lock); + while (1) { + segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs, + offset); + if (segno >= total_segs) + break; + + offset = segno + 1; + if (test_and_clear_bit(segno, dirty_i->dirty_segmap[PRE])) + dirty_i->nr_dirty[PRE]--; + + /* Let's use trim */ + if (test_opt(sbi, DISCARD)) + blkdev_issue_discard(sbi->sb->s_bdev, + START_BLOCK(sbi, segno) << + sbi->log_sectors_per_block, + 1 << (sbi->log_sectors_per_block + + sbi->log_blocks_per_seg), + GFP_NOFS, 0); + } + mutex_unlock(&dirty_i->seglist_lock); +} + +static void __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno) +{ + struct sit_info *sit_i = SIT_I(sbi); + if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) + sit_i->dirty_sentries++; +} + +static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type, + unsigned int segno, int modified) +{ + struct seg_entry *se = get_seg_entry(sbi, segno); + se->type = type; + if (modified) + __mark_sit_entry_dirty(sbi, segno); +} + +static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del) +{ + struct seg_entry *se; + unsigned int segno, offset; + long int new_vblocks; + + segno = GET_SEGNO(sbi, blkaddr); + + se = get_seg_entry(sbi, segno); + new_vblocks = se->valid_blocks + del; + offset = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & (sbi->blocks_per_seg - 1); + + BUG_ON((new_vblocks >> (sizeof(unsigned short) << 3) || + (new_vblocks > sbi->blocks_per_seg))); + + se->valid_blocks = new_vblocks; + se->mtime = get_mtime(sbi); + SIT_I(sbi)->max_mtime = se->mtime; + + /* Update valid block bitmap */ + if (del > 0) { + if (f2fs_set_bit(offset, se->cur_valid_map)) + BUG(); + } else { + if (!f2fs_clear_bit(offset, se->cur_valid_map)) + BUG(); + } + if (!f2fs_test_bit(offset, se->ckpt_valid_map)) + se->ckpt_valid_blocks += del; + + __mark_sit_entry_dirty(sbi, segno); + + /* update total number of valid blocks to be written in ckpt area */ + SIT_I(sbi)->written_valid_blocks += del; + + if (sbi->segs_per_sec > 1) + get_sec_entry(sbi, segno)->valid_blocks += del; +} + +static void refresh_sit_entry(struct f2fs_sb_info *sbi, + block_t old_blkaddr, block_t new_blkaddr) +{ + update_sit_entry(sbi, new_blkaddr, 1); + if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) + update_sit_entry(sbi, old_blkaddr, -1); +} + +void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr) +{ + unsigned int segno = GET_SEGNO(sbi, addr); + struct sit_info *sit_i = SIT_I(sbi); + + BUG_ON(addr == NULL_ADDR); + if (addr == NEW_ADDR) + return; + + /* add it into sit main buffer */ + mutex_lock(&sit_i->sentry_lock); + + update_sit_entry(sbi, addr, -1); + + /* add it into dirty seglist */ + locate_dirty_segment(sbi, segno); + + mutex_unlock(&sit_i->sentry_lock); +} + +/* + * This function should be resided under the curseg_mutex lock + */ +static void __add_sum_entry(struct f2fs_sb_info *sbi, int type, + struct f2fs_summary *sum, unsigned short offset) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + void *addr = curseg->sum_blk; + addr += offset * sizeof(struct f2fs_summary); + memcpy(addr, sum, sizeof(struct f2fs_summary)); + return; +} + +/* + * Calculate the number of current summary pages for writing + */ +int npages_for_summary_flush(struct f2fs_sb_info *sbi) +{ + int total_size_bytes = 0; + int valid_sum_count = 0; + int i, sum_space; + + for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { + if (sbi->ckpt->alloc_type[i] == SSR) + valid_sum_count += sbi->blocks_per_seg; + else + valid_sum_count += curseg_blkoff(sbi, i); + } + + total_size_bytes = valid_sum_count * (SUMMARY_SIZE + 1) + + sizeof(struct nat_journal) + 2 + + sizeof(struct sit_journal) + 2; + sum_space = PAGE_CACHE_SIZE - SUM_FOOTER_SIZE; + if (total_size_bytes < sum_space) + return 1; + else if (total_size_bytes < 2 * sum_space) + return 2; + return 3; +} + +/* + * Caller should put this summary page + */ +struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno) +{ + return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno)); +} + +static void write_sum_page(struct f2fs_sb_info *sbi, + struct f2fs_summary_block *sum_blk, block_t blk_addr) +{ + struct page *page = grab_meta_page(sbi, blk_addr); + void *kaddr = page_address(page); + memcpy(kaddr, sum_blk, PAGE_CACHE_SIZE); + set_page_dirty(page); + f2fs_put_page(page, 1); +} + +static unsigned int check_prefree_segments(struct f2fs_sb_info *sbi, + int ofs_unit, int type) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + unsigned long *prefree_segmap = dirty_i->dirty_segmap[PRE]; + unsigned int segno, next_segno, i; + int ofs = 0; + + /* + * If there is not enough reserved sections, + * we should not reuse prefree segments. + */ + if (has_not_enough_free_secs(sbi)) + return NULL_SEGNO; + + /* + * NODE page should not reuse prefree segment, + * since those information is used for SPOR. + */ + if (IS_NODESEG(type)) + return NULL_SEGNO; +next: + segno = find_next_bit(prefree_segmap, TOTAL_SEGS(sbi), ofs++); + ofs = ((segno / ofs_unit) * ofs_unit) + ofs_unit; + if (segno < TOTAL_SEGS(sbi)) { + /* skip intermediate segments in a section */ + if (segno % ofs_unit) + goto next; + + /* skip if whole section is not prefree */ + next_segno = find_next_zero_bit(prefree_segmap, + TOTAL_SEGS(sbi), segno + 1); + if (next_segno - segno < ofs_unit) + goto next; + + /* skip if whole section was not free at the last checkpoint */ + for (i = 0; i < ofs_unit; i++) + if (get_seg_entry(sbi, segno)->ckpt_valid_blocks) + goto next; + return segno; + } + return NULL_SEGNO; +} + +/* + * Find a new segment from the free segments bitmap to right order + * This function should be returned with success, otherwise BUG + */ +static void get_new_segment(struct f2fs_sb_info *sbi, + unsigned int *newseg, bool new_sec, int dir) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int total_secs = sbi->total_sections; + unsigned int segno, secno, zoneno; + unsigned int total_zones = sbi->total_sections / sbi->secs_per_zone; + unsigned int hint = *newseg / sbi->segs_per_sec; + unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg); + unsigned int left_start = hint; + bool init = true; + int go_left = 0; + int i; + + write_lock(&free_i->segmap_lock); + + if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) { + segno = find_next_zero_bit(free_i->free_segmap, + TOTAL_SEGS(sbi), *newseg + 1); + if (segno < TOTAL_SEGS(sbi)) + goto got_it; + } +find_other_zone: + secno = find_next_zero_bit(free_i->free_secmap, total_secs, hint); + if (secno >= total_secs) { + if (dir == ALLOC_RIGHT) { + secno = find_next_zero_bit(free_i->free_secmap, + total_secs, 0); + BUG_ON(secno >= total_secs); + } else { + go_left = 1; + left_start = hint - 1; + } + } + if (go_left == 0) + goto skip_left; + + while (test_bit(left_start, free_i->free_secmap)) { + if (left_start > 0) { + left_start--; + continue; + } + left_start = find_next_zero_bit(free_i->free_secmap, + total_secs, 0); + BUG_ON(left_start >= total_secs); + break; + } + secno = left_start; +skip_left: + hint = secno; + segno = secno * sbi->segs_per_sec; + zoneno = secno / sbi->secs_per_zone; + + /* give up on finding another zone */ + if (!init) + goto got_it; + if (sbi->secs_per_zone == 1) + goto got_it; + if (zoneno == old_zoneno) + goto got_it; + if (dir == ALLOC_LEFT) { + if (!go_left && zoneno + 1 >= total_zones) + goto got_it; + if (go_left && zoneno == 0) + goto got_it; + } + for (i = 0; i < NR_CURSEG_TYPE; i++) + if (CURSEG_I(sbi, i)->zone == zoneno) + break; + + if (i < NR_CURSEG_TYPE) { + /* zone is in user, try another */ + if (go_left) + hint = zoneno * sbi->secs_per_zone - 1; + else if (zoneno + 1 >= total_zones) + hint = 0; + else + hint = (zoneno + 1) * sbi->secs_per_zone; + init = false; + goto find_other_zone; + } +got_it: + /* set it as dirty segment in free segmap */ + BUG_ON(test_bit(segno, free_i->free_segmap)); + __set_inuse(sbi, segno); + *newseg = segno; + write_unlock(&free_i->segmap_lock); +} + +static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + struct summary_footer *sum_footer; + + curseg->segno = curseg->next_segno; + curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno); + curseg->next_blkoff = 0; + curseg->next_segno = NULL_SEGNO; + + sum_footer = &(curseg->sum_blk->footer); + memset(sum_footer, 0, sizeof(struct summary_footer)); + if (IS_DATASEG(type)) + SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA); + if (IS_NODESEG(type)) + SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE); + __set_sit_entry_type(sbi, type, curseg->segno, modified); +} + +/* + * Allocate a current working segment. + * This function always allocates a free segment in LFS manner. + */ +static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + unsigned int segno = curseg->segno; + int dir = ALLOC_LEFT; + + write_sum_page(sbi, curseg->sum_blk, + GET_SUM_BLOCK(sbi, curseg->segno)); + if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA) + dir = ALLOC_RIGHT; + + if (test_opt(sbi, NOHEAP)) + dir = ALLOC_RIGHT; + + get_new_segment(sbi, &segno, new_sec, dir); + curseg->next_segno = segno; + reset_curseg(sbi, type, 1); + curseg->alloc_type = LFS; +} + +static void __next_free_blkoff(struct f2fs_sb_info *sbi, + struct curseg_info *seg, block_t start) +{ + struct seg_entry *se = get_seg_entry(sbi, seg->segno); + block_t ofs; + for (ofs = start; ofs < sbi->blocks_per_seg; ofs++) { + if (!f2fs_test_bit(ofs, se->ckpt_valid_map) + && !f2fs_test_bit(ofs, se->cur_valid_map)) + break; + } + seg->next_blkoff = ofs; +} + +/* + * If a segment is written by LFS manner, next block offset is just obtained + * by increasing the current block offset. However, if a segment is written by + * SSR manner, next block offset obtained by calling __next_free_blkoff + */ +static void __refresh_next_blkoff(struct f2fs_sb_info *sbi, + struct curseg_info *seg) +{ + if (seg->alloc_type == SSR) + __next_free_blkoff(sbi, seg, seg->next_blkoff + 1); + else + seg->next_blkoff++; +} + +/* + * This function always allocates a used segment (from dirty seglist) by SSR + * manner, so it should recover the existing segment information of valid blocks + */ +static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + struct curseg_info *curseg = CURSEG_I(sbi, type); + unsigned int new_segno = curseg->next_segno; + struct f2fs_summary_block *sum_node; + struct page *sum_page; + + write_sum_page(sbi, curseg->sum_blk, + GET_SUM_BLOCK(sbi, curseg->segno)); + __set_test_and_inuse(sbi, new_segno); + + mutex_lock(&dirty_i->seglist_lock); + __remove_dirty_segment(sbi, new_segno, PRE); + __remove_dirty_segment(sbi, new_segno, DIRTY); + mutex_unlock(&dirty_i->seglist_lock); + + reset_curseg(sbi, type, 1); + curseg->alloc_type = SSR; + __next_free_blkoff(sbi, curseg, 0); + + if (reuse) { + sum_page = get_sum_page(sbi, new_segno); + sum_node = (struct f2fs_summary_block *)page_address(sum_page); + memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE); + f2fs_put_page(sum_page, 1); + } +} + +/* + * flush out current segment and replace it with new segment + * This function should be returned with success, otherwise BUG + */ +static void allocate_segment_by_default(struct f2fs_sb_info *sbi, + int type, bool force) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + unsigned int ofs_unit; + + if (force) { + new_curseg(sbi, type, true); + goto out; + } + + ofs_unit = need_SSR(sbi) ? 1 : sbi->segs_per_sec; + curseg->next_segno = check_prefree_segments(sbi, ofs_unit, type); + + if (curseg->next_segno != NULL_SEGNO) + change_curseg(sbi, type, false); + else if (type == CURSEG_WARM_NODE) + new_curseg(sbi, type, false); + else if (need_SSR(sbi) && get_ssr_segment(sbi, type)) + change_curseg(sbi, type, true); + else + new_curseg(sbi, type, false); +out: + sbi->segment_count[curseg->alloc_type]++; +} + +void allocate_new_segments(struct f2fs_sb_info *sbi) +{ + struct curseg_info *curseg; + unsigned int old_curseg; + int i; + + for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { + curseg = CURSEG_I(sbi, i); + old_curseg = curseg->segno; + SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true); + locate_dirty_segment(sbi, old_curseg); + } +} + +static const struct segment_allocation default_salloc_ops = { + .allocate_segment = allocate_segment_by_default, +}; + +static void f2fs_end_io_write(struct bio *bio, int err) +{ + const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); + struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; + struct bio_private *p = bio->bi_private; + + do { + struct page *page = bvec->bv_page; + + if (--bvec >= bio->bi_io_vec) + prefetchw(&bvec->bv_page->flags); + if (!uptodate) { + SetPageError(page); + if (page->mapping) + set_bit(AS_EIO, &page->mapping->flags); + set_ckpt_flags(p->sbi->ckpt, CP_ERROR_FLAG); + } + end_page_writeback(page); + dec_page_count(p->sbi, F2FS_WRITEBACK); + } while (bvec >= bio->bi_io_vec); + + if (p->is_sync) + complete(p->wait); + kfree(p); + bio_put(bio); +} + +struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages) +{ + struct bio *bio; + struct bio_private *priv; +retry: + priv = kmalloc(sizeof(struct bio_private), GFP_NOFS); + if (!priv) { + cond_resched(); + goto retry; + } + + /* No failure on bio allocation */ + bio = bio_alloc(GFP_NOIO, npages); + bio->bi_bdev = bdev; + bio->bi_private = priv; + return bio; +} + +static void do_submit_bio(struct f2fs_sb_info *sbi, + enum page_type type, bool sync) +{ + int rw = sync ? WRITE_SYNC : WRITE; + enum page_type btype = type > META ? META : type; + + if (type >= META_FLUSH) + rw = WRITE_FLUSH_FUA; + + if (sbi->bio[btype]) { + struct bio_private *p = sbi->bio[btype]->bi_private; + p->sbi = sbi; + sbi->bio[btype]->bi_end_io = f2fs_end_io_write; + if (type == META_FLUSH) { + DECLARE_COMPLETION_ONSTACK(wait); + p->is_sync = true; + p->wait = &wait; + submit_bio(rw, sbi->bio[btype]); + wait_for_completion(&wait); + } else { + p->is_sync = false; + submit_bio(rw, sbi->bio[btype]); + } + sbi->bio[btype] = NULL; + } +} + +void f2fs_submit_bio(struct f2fs_sb_info *sbi, enum page_type type, bool sync) +{ + down_write(&sbi->bio_sem); + do_submit_bio(sbi, type, sync); + up_write(&sbi->bio_sem); +} + +static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page, + block_t blk_addr, enum page_type type) +{ + struct block_device *bdev = sbi->sb->s_bdev; + + verify_block_addr(sbi, blk_addr); + + down_write(&sbi->bio_sem); + + inc_page_count(sbi, F2FS_WRITEBACK); + + if (sbi->bio[type] && sbi->last_block_in_bio[type] != blk_addr - 1) + do_submit_bio(sbi, type, false); +alloc_new: + if (sbi->bio[type] == NULL) { + sbi->bio[type] = f2fs_bio_alloc(bdev, bio_get_nr_vecs(bdev)); + sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); + /* + * The end_io will be assigned at the sumbission phase. + * Until then, let bio_add_page() merge consecutive IOs as much + * as possible. + */ + } + + if (bio_add_page(sbi->bio[type], page, PAGE_CACHE_SIZE, 0) < + PAGE_CACHE_SIZE) { + do_submit_bio(sbi, type, false); + goto alloc_new; + } + + sbi->last_block_in_bio[type] = blk_addr; + + up_write(&sbi->bio_sem); +} + +static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + if (curseg->next_blkoff < sbi->blocks_per_seg) + return true; + return false; +} + +static int __get_segment_type_2(struct page *page, enum page_type p_type) +{ + if (p_type == DATA) + return CURSEG_HOT_DATA; + else + return CURSEG_HOT_NODE; +} + +static int __get_segment_type_4(struct page *page, enum page_type p_type) +{ + if (p_type == DATA) { + struct inode *inode = page->mapping->host; + + if (S_ISDIR(inode->i_mode)) + return CURSEG_HOT_DATA; + else + return CURSEG_COLD_DATA; + } else { + if (IS_DNODE(page) && !is_cold_node(page)) + return CURSEG_HOT_NODE; + else + return CURSEG_COLD_NODE; + } +} + +static int __get_segment_type_6(struct page *page, enum page_type p_type) +{ + if (p_type == DATA) { + struct inode *inode = page->mapping->host; + + if (S_ISDIR(inode->i_mode)) + return CURSEG_HOT_DATA; + else if (is_cold_data(page) || is_cold_file(inode)) + return CURSEG_COLD_DATA; + else + return CURSEG_WARM_DATA; + } else { + if (IS_DNODE(page)) + return is_cold_node(page) ? CURSEG_WARM_NODE : + CURSEG_HOT_NODE; + else + return CURSEG_COLD_NODE; + } +} + +static int __get_segment_type(struct page *page, enum page_type p_type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); + switch (sbi->active_logs) { + case 2: + return __get_segment_type_2(page, p_type); + case 4: + return __get_segment_type_4(page, p_type); + } + /* NR_CURSEG_TYPE(6) logs by default */ + BUG_ON(sbi->active_logs != NR_CURSEG_TYPE); + return __get_segment_type_6(page, p_type); +} + +static void do_write_page(struct f2fs_sb_info *sbi, struct page *page, + block_t old_blkaddr, block_t *new_blkaddr, + struct f2fs_summary *sum, enum page_type p_type) +{ + struct sit_info *sit_i = SIT_I(sbi); + struct curseg_info *curseg; + unsigned int old_cursegno; + int type; + + type = __get_segment_type(page, p_type); + curseg = CURSEG_I(sbi, type); + + mutex_lock(&curseg->curseg_mutex); + + *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); + old_cursegno = curseg->segno; + + /* + * __add_sum_entry should be resided under the curseg_mutex + * because, this function updates a summary entry in the + * current summary block. + */ + __add_sum_entry(sbi, type, sum, curseg->next_blkoff); + + mutex_lock(&sit_i->sentry_lock); + __refresh_next_blkoff(sbi, curseg); + sbi->block_count[curseg->alloc_type]++; + + /* + * SIT information should be updated before segment allocation, + * since SSR needs latest valid block information. + */ + refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr); + + if (!__has_curseg_space(sbi, type)) + sit_i->s_ops->allocate_segment(sbi, type, false); + + locate_dirty_segment(sbi, old_cursegno); + locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); + mutex_unlock(&sit_i->sentry_lock); + + if (p_type == NODE) + fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg)); + + /* writeout dirty page into bdev */ + submit_write_page(sbi, page, *new_blkaddr, p_type); + + mutex_unlock(&curseg->curseg_mutex); +} + +int write_meta_page(struct f2fs_sb_info *sbi, struct page *page, + struct writeback_control *wbc) +{ + if (wbc->for_reclaim) + return AOP_WRITEPAGE_ACTIVATE; + + set_page_writeback(page); + submit_write_page(sbi, page, page->index, META); + return 0; +} + +void write_node_page(struct f2fs_sb_info *sbi, struct page *page, + unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr) +{ + struct f2fs_summary sum; + set_summary(&sum, nid, 0, 0); + do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, NODE); +} + +void write_data_page(struct inode *inode, struct page *page, + struct dnode_of_data *dn, block_t old_blkaddr, + block_t *new_blkaddr) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_summary sum; + struct node_info ni; + + BUG_ON(old_blkaddr == NULL_ADDR); + get_node_info(sbi, dn->nid, &ni); + set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); + + do_write_page(sbi, page, old_blkaddr, + new_blkaddr, &sum, DATA); +} + +void rewrite_data_page(struct f2fs_sb_info *sbi, struct page *page, + block_t old_blk_addr) +{ + submit_write_page(sbi, page, old_blk_addr, DATA); +} + +void recover_data_page(struct f2fs_sb_info *sbi, + struct page *page, struct f2fs_summary *sum, + block_t old_blkaddr, block_t new_blkaddr) +{ + struct sit_info *sit_i = SIT_I(sbi); + struct curseg_info *curseg; + unsigned int segno, old_cursegno; + struct seg_entry *se; + int type; + + segno = GET_SEGNO(sbi, new_blkaddr); + se = get_seg_entry(sbi, segno); + type = se->type; + + if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) { + if (old_blkaddr == NULL_ADDR) + type = CURSEG_COLD_DATA; + else + type = CURSEG_WARM_DATA; + } + curseg = CURSEG_I(sbi, type); + + mutex_lock(&curseg->curseg_mutex); + mutex_lock(&sit_i->sentry_lock); + + old_cursegno = curseg->segno; + + /* change the current segment */ + if (segno != curseg->segno) { + curseg->next_segno = segno; + change_curseg(sbi, type, true); + } + + curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) & + (sbi->blocks_per_seg - 1); + __add_sum_entry(sbi, type, sum, curseg->next_blkoff); + + refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); + + locate_dirty_segment(sbi, old_cursegno); + locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); + + mutex_unlock(&sit_i->sentry_lock); + mutex_unlock(&curseg->curseg_mutex); +} + +void rewrite_node_page(struct f2fs_sb_info *sbi, + struct page *page, struct f2fs_summary *sum, + block_t old_blkaddr, block_t new_blkaddr) +{ + struct sit_info *sit_i = SIT_I(sbi); + int type = CURSEG_WARM_NODE; + struct curseg_info *curseg; + unsigned int segno, old_cursegno; + block_t next_blkaddr = next_blkaddr_of_node(page); + unsigned int next_segno = GET_SEGNO(sbi, next_blkaddr); + + curseg = CURSEG_I(sbi, type); + + mutex_lock(&curseg->curseg_mutex); + mutex_lock(&sit_i->sentry_lock); + + segno = GET_SEGNO(sbi, new_blkaddr); + old_cursegno = curseg->segno; + + /* change the current segment */ + if (segno != curseg->segno) { + curseg->next_segno = segno; + change_curseg(sbi, type, true); + } + curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) & + (sbi->blocks_per_seg - 1); + __add_sum_entry(sbi, type, sum, curseg->next_blkoff); + + /* change the current log to the next block addr in advance */ + if (next_segno != segno) { + curseg->next_segno = next_segno; + change_curseg(sbi, type, true); + } + curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, next_blkaddr) & + (sbi->blocks_per_seg - 1); + + /* rewrite node page */ + set_page_writeback(page); + submit_write_page(sbi, page, new_blkaddr, NODE); + f2fs_submit_bio(sbi, NODE, true); + refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); + + locate_dirty_segment(sbi, old_cursegno); + locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); + + mutex_unlock(&sit_i->sentry_lock); + mutex_unlock(&curseg->curseg_mutex); +} + +static int read_compacted_summaries(struct f2fs_sb_info *sbi) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + struct curseg_info *seg_i; + unsigned char *kaddr; + struct page *page; + block_t start; + int i, j, offset; + + start = start_sum_block(sbi); + + page = get_meta_page(sbi, start++); + kaddr = (unsigned char *)page_address(page); + + /* Step 1: restore nat cache */ + seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); + memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE); + + /* Step 2: restore sit cache */ + seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); + memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE, + SUM_JOURNAL_SIZE); + offset = 2 * SUM_JOURNAL_SIZE; + + /* Step 3: restore summary entries */ + for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { + unsigned short blk_off; + unsigned int segno; + + seg_i = CURSEG_I(sbi, i); + segno = le32_to_cpu(ckpt->cur_data_segno[i]); + blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]); + seg_i->next_segno = segno; + reset_curseg(sbi, i, 0); + seg_i->alloc_type = ckpt->alloc_type[i]; + seg_i->next_blkoff = blk_off; + + if (seg_i->alloc_type == SSR) + blk_off = sbi->blocks_per_seg; + + for (j = 0; j < blk_off; j++) { + struct f2fs_summary *s; + s = (struct f2fs_summary *)(kaddr + offset); + seg_i->sum_blk->entries[j] = *s; + offset += SUMMARY_SIZE; + if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE - + SUM_FOOTER_SIZE) + continue; + + f2fs_put_page(page, 1); + page = NULL; + + page = get_meta_page(sbi, start++); + kaddr = (unsigned char *)page_address(page); + offset = 0; + } + } + f2fs_put_page(page, 1); + return 0; +} + +static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + struct f2fs_summary_block *sum; + struct curseg_info *curseg; + struct page *new; + unsigned short blk_off; + unsigned int segno = 0; + block_t blk_addr = 0; + + /* get segment number and block addr */ + if (IS_DATASEG(type)) { + segno = le32_to_cpu(ckpt->cur_data_segno[type]); + blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type - + CURSEG_HOT_DATA]); + if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) + blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type); + else + blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type); + } else { + segno = le32_to_cpu(ckpt->cur_node_segno[type - + CURSEG_HOT_NODE]); + blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type - + CURSEG_HOT_NODE]); + if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) + blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE, + type - CURSEG_HOT_NODE); + else + blk_addr = GET_SUM_BLOCK(sbi, segno); + } + + new = get_meta_page(sbi, blk_addr); + sum = (struct f2fs_summary_block *)page_address(new); + + if (IS_NODESEG(type)) { + if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) { + struct f2fs_summary *ns = &sum->entries[0]; + int i; + for (i = 0; i < sbi->blocks_per_seg; i++, ns++) { + ns->version = 0; + ns->ofs_in_node = 0; + } + } else { + if (restore_node_summary(sbi, segno, sum)) { + f2fs_put_page(new, 1); + return -EINVAL; + } + } + } + + /* set uncompleted segment to curseg */ + curseg = CURSEG_I(sbi, type); + mutex_lock(&curseg->curseg_mutex); + memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE); + curseg->next_segno = segno; + reset_curseg(sbi, type, 0); + curseg->alloc_type = ckpt->alloc_type[type]; + curseg->next_blkoff = blk_off; + mutex_unlock(&curseg->curseg_mutex); + f2fs_put_page(new, 1); + return 0; +} + +static int restore_curseg_summaries(struct f2fs_sb_info *sbi) +{ + int type = CURSEG_HOT_DATA; + + if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) { + /* restore for compacted data summary */ + if (read_compacted_summaries(sbi)) + return -EINVAL; + type = CURSEG_HOT_NODE; + } + + for (; type <= CURSEG_COLD_NODE; type++) + if (read_normal_summaries(sbi, type)) + return -EINVAL; + return 0; +} + +static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr) +{ + struct page *page; + unsigned char *kaddr; + struct f2fs_summary *summary; + struct curseg_info *seg_i; + int written_size = 0; + int i, j; + + page = grab_meta_page(sbi, blkaddr++); + kaddr = (unsigned char *)page_address(page); + + /* Step 1: write nat cache */ + seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); + memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE); + written_size += SUM_JOURNAL_SIZE; + + /* Step 2: write sit cache */ + seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); + memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits, + SUM_JOURNAL_SIZE); + written_size += SUM_JOURNAL_SIZE; + + set_page_dirty(page); + + /* Step 3: write summary entries */ + for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { + unsigned short blkoff; + seg_i = CURSEG_I(sbi, i); + if (sbi->ckpt->alloc_type[i] == SSR) + blkoff = sbi->blocks_per_seg; + else + blkoff = curseg_blkoff(sbi, i); + + for (j = 0; j < blkoff; j++) { + if (!page) { + page = grab_meta_page(sbi, blkaddr++); + kaddr = (unsigned char *)page_address(page); + written_size = 0; + } + summary = (struct f2fs_summary *)(kaddr + written_size); + *summary = seg_i->sum_blk->entries[j]; + written_size += SUMMARY_SIZE; + set_page_dirty(page); + + if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE - + SUM_FOOTER_SIZE) + continue; + + f2fs_put_page(page, 1); + page = NULL; + } + } + if (page) + f2fs_put_page(page, 1); +} + +static void write_normal_summaries(struct f2fs_sb_info *sbi, + block_t blkaddr, int type) +{ + int i, end; + if (IS_DATASEG(type)) + end = type + NR_CURSEG_DATA_TYPE; + else + end = type + NR_CURSEG_NODE_TYPE; + + for (i = type; i < end; i++) { + struct curseg_info *sum = CURSEG_I(sbi, i); + mutex_lock(&sum->curseg_mutex); + write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type)); + mutex_unlock(&sum->curseg_mutex); + } +} + +void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk) +{ + if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) + write_compacted_summaries(sbi, start_blk); + else + write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA); +} + +void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk) +{ + if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) + write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE); + return; +} + +int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type, + unsigned int val, int alloc) +{ + int i; + + if (type == NAT_JOURNAL) { + for (i = 0; i < nats_in_cursum(sum); i++) { + if (le32_to_cpu(nid_in_journal(sum, i)) == val) + return i; + } + if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) + return update_nats_in_cursum(sum, 1); + } else if (type == SIT_JOURNAL) { + for (i = 0; i < sits_in_cursum(sum); i++) + if (le32_to_cpu(segno_in_journal(sum, i)) == val) + return i; + if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES) + return update_sits_in_cursum(sum, 1); + } + return -1; +} + +static struct page *get_current_sit_page(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct sit_info *sit_i = SIT_I(sbi); + unsigned int offset = SIT_BLOCK_OFFSET(sit_i, segno); + block_t blk_addr = sit_i->sit_base_addr + offset; + + check_seg_range(sbi, segno); + + /* calculate sit block address */ + if (f2fs_test_bit(offset, sit_i->sit_bitmap)) + blk_addr += sit_i->sit_blocks; + + return get_meta_page(sbi, blk_addr); +} + +static struct page *get_next_sit_page(struct f2fs_sb_info *sbi, + unsigned int start) +{ + struct sit_info *sit_i = SIT_I(sbi); + struct page *src_page, *dst_page; + pgoff_t src_off, dst_off; + void *src_addr, *dst_addr; + + src_off = current_sit_addr(sbi, start); + dst_off = next_sit_addr(sbi, src_off); + + /* get current sit block page without lock */ + src_page = get_meta_page(sbi, src_off); + dst_page = grab_meta_page(sbi, dst_off); + BUG_ON(PageDirty(src_page)); + + src_addr = page_address(src_page); + dst_addr = page_address(dst_page); + memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); + + set_page_dirty(dst_page); + f2fs_put_page(src_page, 1); + + set_to_next_sit(sit_i, start); + + return dst_page; +} + +static bool flush_sits_in_journal(struct f2fs_sb_info *sbi) +{ + struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); + struct f2fs_summary_block *sum = curseg->sum_blk; + int i; + + /* + * If the journal area in the current summary is full of sit entries, + * all the sit entries will be flushed. Otherwise the sit entries + * are not able to replace with newly hot sit entries. + */ + if (sits_in_cursum(sum) >= SIT_JOURNAL_ENTRIES) { + for (i = sits_in_cursum(sum) - 1; i >= 0; i--) { + unsigned int segno; + segno = le32_to_cpu(segno_in_journal(sum, i)); + __mark_sit_entry_dirty(sbi, segno); + } + update_sits_in_cursum(sum, -sits_in_cursum(sum)); + return 1; + } + return 0; +} + +/* + * CP calls this function, which flushes SIT entries including sit_journal, + * and moves prefree segs to free segs. + */ +void flush_sit_entries(struct f2fs_sb_info *sbi) +{ + struct sit_info *sit_i = SIT_I(sbi); + unsigned long *bitmap = sit_i->dirty_sentries_bitmap; + struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); + struct f2fs_summary_block *sum = curseg->sum_blk; + unsigned long nsegs = TOTAL_SEGS(sbi); + struct page *page = NULL; + struct f2fs_sit_block *raw_sit = NULL; + unsigned int start = 0, end = 0; + unsigned int segno = -1; + bool flushed; + + mutex_lock(&curseg->curseg_mutex); + mutex_lock(&sit_i->sentry_lock); + + /* + * "flushed" indicates whether sit entries in journal are flushed + * to the SIT area or not. + */ + flushed = flush_sits_in_journal(sbi); + + while ((segno = find_next_bit(bitmap, nsegs, segno + 1)) < nsegs) { + struct seg_entry *se = get_seg_entry(sbi, segno); + int sit_offset, offset; + + sit_offset = SIT_ENTRY_OFFSET(sit_i, segno); + + if (flushed) + goto to_sit_page; + + offset = lookup_journal_in_cursum(sum, SIT_JOURNAL, segno, 1); + if (offset >= 0) { + segno_in_journal(sum, offset) = cpu_to_le32(segno); + seg_info_to_raw_sit(se, &sit_in_journal(sum, offset)); + goto flush_done; + } +to_sit_page: + if (!page || (start > segno) || (segno > end)) { + if (page) { + f2fs_put_page(page, 1); + page = NULL; + } + + start = START_SEGNO(sit_i, segno); + end = start + SIT_ENTRY_PER_BLOCK - 1; + + /* read sit block that will be updated */ + page = get_next_sit_page(sbi, start); + raw_sit = page_address(page); + } + + /* udpate entry in SIT block */ + seg_info_to_raw_sit(se, &raw_sit->entries[sit_offset]); +flush_done: + __clear_bit(segno, bitmap); + sit_i->dirty_sentries--; + } + mutex_unlock(&sit_i->sentry_lock); + mutex_unlock(&curseg->curseg_mutex); + + /* writeout last modified SIT block */ + f2fs_put_page(page, 1); + + set_prefree_as_free_segments(sbi); +} + +static int build_sit_info(struct f2fs_sb_info *sbi) +{ + struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + struct sit_info *sit_i; + unsigned int sit_segs, start; + char *src_bitmap, *dst_bitmap; + unsigned int bitmap_size; + + /* allocate memory for SIT information */ + sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL); + if (!sit_i) + return -ENOMEM; + + SM_I(sbi)->sit_info = sit_i; + + sit_i->sentries = vzalloc(TOTAL_SEGS(sbi) * sizeof(struct seg_entry)); + if (!sit_i->sentries) + return -ENOMEM; + + bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); + sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL); + if (!sit_i->dirty_sentries_bitmap) + return -ENOMEM; + + for (start = 0; start < TOTAL_SEGS(sbi); start++) { + sit_i->sentries[start].cur_valid_map + = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); + sit_i->sentries[start].ckpt_valid_map + = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); + if (!sit_i->sentries[start].cur_valid_map + || !sit_i->sentries[start].ckpt_valid_map) + return -ENOMEM; + } + + if (sbi->segs_per_sec > 1) { + sit_i->sec_entries = vzalloc(sbi->total_sections * + sizeof(struct sec_entry)); + if (!sit_i->sec_entries) + return -ENOMEM; + } + + /* get information related with SIT */ + sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1; + + /* setup SIT bitmap from ckeckpoint pack */ + bitmap_size = __bitmap_size(sbi, SIT_BITMAP); + src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP); + + dst_bitmap = kzalloc(bitmap_size, GFP_KERNEL); + if (!dst_bitmap) + return -ENOMEM; + memcpy(dst_bitmap, src_bitmap, bitmap_size); + + /* init SIT information */ + sit_i->s_ops = &default_salloc_ops; + + sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr); + sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg; + sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count); + sit_i->sit_bitmap = dst_bitmap; + sit_i->bitmap_size = bitmap_size; + sit_i->dirty_sentries = 0; + sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK; + sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time); + sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec; + mutex_init(&sit_i->sentry_lock); + return 0; +} + +static int build_free_segmap(struct f2fs_sb_info *sbi) +{ + struct f2fs_sm_info *sm_info = SM_I(sbi); + struct free_segmap_info *free_i; + unsigned int bitmap_size, sec_bitmap_size; + + /* allocate memory for free segmap information */ + free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL); + if (!free_i) + return -ENOMEM; + + SM_I(sbi)->free_info = free_i; + + bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); + free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL); + if (!free_i->free_segmap) + return -ENOMEM; + + sec_bitmap_size = f2fs_bitmap_size(sbi->total_sections); + free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL); + if (!free_i->free_secmap) + return -ENOMEM; + + /* set all segments as dirty temporarily */ + memset(free_i->free_segmap, 0xff, bitmap_size); + memset(free_i->free_secmap, 0xff, sec_bitmap_size); + + /* init free segmap information */ + free_i->start_segno = + (unsigned int) GET_SEGNO_FROM_SEG0(sbi, sm_info->main_blkaddr); + free_i->free_segments = 0; + free_i->free_sections = 0; + rwlock_init(&free_i->segmap_lock); + return 0; +} + +static int build_curseg(struct f2fs_sb_info *sbi) +{ + struct curseg_info *array; + int i; + + array = kzalloc(sizeof(*array) * NR_CURSEG_TYPE, GFP_KERNEL); + if (!array) + return -ENOMEM; + + SM_I(sbi)->curseg_array = array; + + for (i = 0; i < NR_CURSEG_TYPE; i++) { + mutex_init(&array[i].curseg_mutex); + array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL); + if (!array[i].sum_blk) + return -ENOMEM; + array[i].segno = NULL_SEGNO; + array[i].next_blkoff = 0; + } + return restore_curseg_summaries(sbi); +} + +static void build_sit_entries(struct f2fs_sb_info *sbi) +{ + struct sit_info *sit_i = SIT_I(sbi); + struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); + struct f2fs_summary_block *sum = curseg->sum_blk; + unsigned int start; + + for (start = 0; start < TOTAL_SEGS(sbi); start++) { + struct seg_entry *se = &sit_i->sentries[start]; + struct f2fs_sit_block *sit_blk; + struct f2fs_sit_entry sit; + struct page *page; + int i; + + mutex_lock(&curseg->curseg_mutex); + for (i = 0; i < sits_in_cursum(sum); i++) { + if (le32_to_cpu(segno_in_journal(sum, i)) == start) { + sit = sit_in_journal(sum, i); + mutex_unlock(&curseg->curseg_mutex); + goto got_it; + } + } + mutex_unlock(&curseg->curseg_mutex); + page = get_current_sit_page(sbi, start); + sit_blk = (struct f2fs_sit_block *)page_address(page); + sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)]; + f2fs_put_page(page, 1); +got_it: + check_block_count(sbi, start, &sit); + seg_info_from_raw_sit(se, &sit); + if (sbi->segs_per_sec > 1) { + struct sec_entry *e = get_sec_entry(sbi, start); + e->valid_blocks += se->valid_blocks; + } + } +} + +static void init_free_segmap(struct f2fs_sb_info *sbi) +{ + unsigned int start; + int type; + + for (start = 0; start < TOTAL_SEGS(sbi); start++) { + struct seg_entry *sentry = get_seg_entry(sbi, start); + if (!sentry->valid_blocks) + __set_free(sbi, start); + } + + /* set use the current segments */ + for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) { + struct curseg_info *curseg_t = CURSEG_I(sbi, type); + __set_test_and_inuse(sbi, curseg_t->segno); + } +} + +static void init_dirty_segmap(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int segno = 0, offset = 0; + unsigned short valid_blocks; + + while (segno < TOTAL_SEGS(sbi)) { + /* find dirty segment based on free segmap */ + segno = find_next_inuse(free_i, TOTAL_SEGS(sbi), offset); + if (segno >= TOTAL_SEGS(sbi)) + break; + offset = segno + 1; + valid_blocks = get_valid_blocks(sbi, segno, 0); + if (valid_blocks >= sbi->blocks_per_seg || !valid_blocks) + continue; + mutex_lock(&dirty_i->seglist_lock); + __locate_dirty_segment(sbi, segno, DIRTY); + mutex_unlock(&dirty_i->seglist_lock); + } +} + +static int init_victim_segmap(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); + + dirty_i->victim_segmap[FG_GC] = kzalloc(bitmap_size, GFP_KERNEL); + dirty_i->victim_segmap[BG_GC] = kzalloc(bitmap_size, GFP_KERNEL); + if (!dirty_i->victim_segmap[FG_GC] || !dirty_i->victim_segmap[BG_GC]) + return -ENOMEM; + return 0; +} + +static int build_dirty_segmap(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i; + unsigned int bitmap_size, i; + + /* allocate memory for dirty segments list information */ + dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL); + if (!dirty_i) + return -ENOMEM; + + SM_I(sbi)->dirty_info = dirty_i; + mutex_init(&dirty_i->seglist_lock); + + bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); + + for (i = 0; i < NR_DIRTY_TYPE; i++) { + dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL); + if (!dirty_i->dirty_segmap[i]) + return -ENOMEM; + } + + init_dirty_segmap(sbi); + return init_victim_segmap(sbi); +} + +/* + * Update min, max modified time for cost-benefit GC algorithm + */ +static void init_min_max_mtime(struct f2fs_sb_info *sbi) +{ + struct sit_info *sit_i = SIT_I(sbi); + unsigned int segno; + + mutex_lock(&sit_i->sentry_lock); + + sit_i->min_mtime = LLONG_MAX; + + for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) { + unsigned int i; + unsigned long long mtime = 0; + + for (i = 0; i < sbi->segs_per_sec; i++) + mtime += get_seg_entry(sbi, segno + i)->mtime; + + mtime = div_u64(mtime, sbi->segs_per_sec); + + if (sit_i->min_mtime > mtime) + sit_i->min_mtime = mtime; + } + sit_i->max_mtime = get_mtime(sbi); + mutex_unlock(&sit_i->sentry_lock); +} + +int build_segment_manager(struct f2fs_sb_info *sbi) +{ + struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + struct f2fs_sm_info *sm_info; + int err; + + sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL); + if (!sm_info) + return -ENOMEM; + + /* init sm info */ + sbi->sm_info = sm_info; + INIT_LIST_HEAD(&sm_info->wblist_head); + spin_lock_init(&sm_info->wblist_lock); + sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); + sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); + sm_info->segment_count = le32_to_cpu(raw_super->segment_count); + sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count); + sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count); + sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main); + sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); + + err = build_sit_info(sbi); + if (err) + return err; + err = build_free_segmap(sbi); + if (err) + return err; + err = build_curseg(sbi); + if (err) + return err; + + /* reinit free segmap based on SIT */ + build_sit_entries(sbi); + + init_free_segmap(sbi); + err = build_dirty_segmap(sbi); + if (err) + return err; + + init_min_max_mtime(sbi); + return 0; +} + +static void discard_dirty_segmap(struct f2fs_sb_info *sbi, + enum dirty_type dirty_type) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + + mutex_lock(&dirty_i->seglist_lock); + kfree(dirty_i->dirty_segmap[dirty_type]); + dirty_i->nr_dirty[dirty_type] = 0; + mutex_unlock(&dirty_i->seglist_lock); +} + +void reset_victim_segmap(struct f2fs_sb_info *sbi) +{ + unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); + memset(DIRTY_I(sbi)->victim_segmap[FG_GC], 0, bitmap_size); +} + +static void destroy_victim_segmap(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + + kfree(dirty_i->victim_segmap[FG_GC]); + kfree(dirty_i->victim_segmap[BG_GC]); +} + +static void destroy_dirty_segmap(struct f2fs_sb_info *sbi) +{ + struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); + int i; + + if (!dirty_i) + return; + + /* discard pre-free/dirty segments list */ + for (i = 0; i < NR_DIRTY_TYPE; i++) + discard_dirty_segmap(sbi, i); + + destroy_victim_segmap(sbi); + SM_I(sbi)->dirty_info = NULL; + kfree(dirty_i); +} + +static void destroy_curseg(struct f2fs_sb_info *sbi) +{ + struct curseg_info *array = SM_I(sbi)->curseg_array; + int i; + + if (!array) + return; + SM_I(sbi)->curseg_array = NULL; + for (i = 0; i < NR_CURSEG_TYPE; i++) + kfree(array[i].sum_blk); + kfree(array); +} + +static void destroy_free_segmap(struct f2fs_sb_info *sbi) +{ + struct free_segmap_info *free_i = SM_I(sbi)->free_info; + if (!free_i) + return; + SM_I(sbi)->free_info = NULL; + kfree(free_i->free_segmap); + kfree(free_i->free_secmap); + kfree(free_i); +} + +static void destroy_sit_info(struct f2fs_sb_info *sbi) +{ + struct sit_info *sit_i = SIT_I(sbi); + unsigned int start; + + if (!sit_i) + return; + + if (sit_i->sentries) { + for (start = 0; start < TOTAL_SEGS(sbi); start++) { + kfree(sit_i->sentries[start].cur_valid_map); + kfree(sit_i->sentries[start].ckpt_valid_map); + } + } + vfree(sit_i->sentries); + vfree(sit_i->sec_entries); + kfree(sit_i->dirty_sentries_bitmap); + + SM_I(sbi)->sit_info = NULL; + kfree(sit_i->sit_bitmap); + kfree(sit_i); +} + +void destroy_segment_manager(struct f2fs_sb_info *sbi) +{ + struct f2fs_sm_info *sm_info = SM_I(sbi); + destroy_dirty_segmap(sbi); + destroy_curseg(sbi); + destroy_free_segmap(sbi); + destroy_sit_info(sbi); + sbi->sm_info = NULL; + kfree(sm_info); +} diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h new file mode 100644 index 00000000000..66a288a52fd --- /dev/null +++ b/fs/f2fs/segment.h @@ -0,0 +1,631 @@ +/* + * fs/f2fs/segment.h + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +/* constant macro */ +#define NULL_SEGNO ((unsigned int)(~0)) + +/* V: Logical segment # in volume, R: Relative segment # in main area */ +#define GET_L2R_SEGNO(free_i, segno) (segno - free_i->start_segno) +#define GET_R2L_SEGNO(free_i, segno) (segno + free_i->start_segno) + +#define IS_DATASEG(t) \ + ((t == CURSEG_HOT_DATA) || (t == CURSEG_COLD_DATA) || \ + (t == CURSEG_WARM_DATA)) + +#define IS_NODESEG(t) \ + ((t == CURSEG_HOT_NODE) || (t == CURSEG_COLD_NODE) || \ + (t == CURSEG_WARM_NODE)) + +#define IS_CURSEG(sbi, segno) \ + ((segno == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) || \ + (segno == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) || \ + (segno == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) || \ + (segno == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) || \ + (segno == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) || \ + (segno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno)) + +#define IS_CURSEC(sbi, secno) \ + ((secno == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno / \ + sbi->segs_per_sec) || \ + (secno == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno / \ + sbi->segs_per_sec) || \ + (secno == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno / \ + sbi->segs_per_sec) || \ + (secno == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno / \ + sbi->segs_per_sec) || \ + (secno == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno / \ + sbi->segs_per_sec) || \ + (secno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno / \ + sbi->segs_per_sec)) \ + +#define START_BLOCK(sbi, segno) \ + (SM_I(sbi)->seg0_blkaddr + \ + (GET_R2L_SEGNO(FREE_I(sbi), segno) << sbi->log_blocks_per_seg)) +#define NEXT_FREE_BLKADDR(sbi, curseg) \ + (START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff) + +#define MAIN_BASE_BLOCK(sbi) (SM_I(sbi)->main_blkaddr) + +#define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) \ + ((blk_addr) - SM_I(sbi)->seg0_blkaddr) +#define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \ + (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> sbi->log_blocks_per_seg) +#define GET_SEGNO(sbi, blk_addr) \ + (((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ? \ + NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \ + GET_SEGNO_FROM_SEG0(sbi, blk_addr))) +#define GET_SECNO(sbi, segno) \ + ((segno) / sbi->segs_per_sec) +#define GET_ZONENO_FROM_SEGNO(sbi, segno) \ + ((segno / sbi->segs_per_sec) / sbi->secs_per_zone) + +#define GET_SUM_BLOCK(sbi, segno) \ + ((sbi->sm_info->ssa_blkaddr) + segno) + +#define GET_SUM_TYPE(footer) ((footer)->entry_type) +#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = type) + +#define SIT_ENTRY_OFFSET(sit_i, segno) \ + (segno % sit_i->sents_per_block) +#define SIT_BLOCK_OFFSET(sit_i, segno) \ + (segno / SIT_ENTRY_PER_BLOCK) +#define START_SEGNO(sit_i, segno) \ + (SIT_BLOCK_OFFSET(sit_i, segno) * SIT_ENTRY_PER_BLOCK) +#define f2fs_bitmap_size(nr) \ + (BITS_TO_LONGS(nr) * sizeof(unsigned long)) +#define TOTAL_SEGS(sbi) (SM_I(sbi)->main_segments) + +#define SECTOR_FROM_BLOCK(sbi, blk_addr) \ + (blk_addr << ((sbi)->log_blocksize - F2FS_LOG_SECTOR_SIZE)) + +/* during checkpoint, bio_private is used to synchronize the last bio */ +struct bio_private { + struct f2fs_sb_info *sbi; + bool is_sync; + void *wait; +}; + +/* + * indicate a block allocation direction: RIGHT and LEFT. + * RIGHT means allocating new sections towards the end of volume. + * LEFT means the opposite direction. + */ +enum { + ALLOC_RIGHT = 0, + ALLOC_LEFT +}; + +/* + * In the victim_sel_policy->alloc_mode, there are two block allocation modes. + * LFS writes data sequentially with cleaning operations. + * SSR (Slack Space Recycle) reuses obsolete space without cleaning operations. + */ +enum { + LFS = 0, + SSR +}; + +/* + * In the victim_sel_policy->gc_mode, there are two gc, aka cleaning, modes. + * GC_CB is based on cost-benefit algorithm. + * GC_GREEDY is based on greedy algorithm. + */ +enum { + GC_CB = 0, + GC_GREEDY +}; + +/* + * BG_GC means the background cleaning job. + * FG_GC means the on-demand cleaning job. + */ +enum { + BG_GC = 0, + FG_GC +}; + +/* for a function parameter to select a victim segment */ +struct victim_sel_policy { + int alloc_mode; /* LFS or SSR */ + int gc_mode; /* GC_CB or GC_GREEDY */ + unsigned long *dirty_segmap; /* dirty segment bitmap */ + unsigned int offset; /* last scanned bitmap offset */ + unsigned int ofs_unit; /* bitmap search unit */ + unsigned int min_cost; /* minimum cost */ + unsigned int min_segno; /* segment # having min. cost */ +}; + +struct seg_entry { + unsigned short valid_blocks; /* # of valid blocks */ + unsigned char *cur_valid_map; /* validity bitmap of blocks */ + /* + * # of valid blocks and the validity bitmap stored in the the last + * checkpoint pack. This information is used by the SSR mode. + */ + unsigned short ckpt_valid_blocks; + unsigned char *ckpt_valid_map; + unsigned char type; /* segment type like CURSEG_XXX_TYPE */ + unsigned long long mtime; /* modification time of the segment */ +}; + +struct sec_entry { + unsigned int valid_blocks; /* # of valid blocks in a section */ +}; + +struct segment_allocation { + void (*allocate_segment)(struct f2fs_sb_info *, int, bool); +}; + +struct sit_info { + const struct segment_allocation *s_ops; + + block_t sit_base_addr; /* start block address of SIT area */ + block_t sit_blocks; /* # of blocks used by SIT area */ + block_t written_valid_blocks; /* # of valid blocks in main area */ + char *sit_bitmap; /* SIT bitmap pointer */ + unsigned int bitmap_size; /* SIT bitmap size */ + + unsigned long *dirty_sentries_bitmap; /* bitmap for dirty sentries */ + unsigned int dirty_sentries; /* # of dirty sentries */ + unsigned int sents_per_block; /* # of SIT entries per block */ + struct mutex sentry_lock; /* to protect SIT cache */ + struct seg_entry *sentries; /* SIT segment-level cache */ + struct sec_entry *sec_entries; /* SIT section-level cache */ + + /* for cost-benefit algorithm in cleaning procedure */ + unsigned long long elapsed_time; /* elapsed time after mount */ + unsigned long long mounted_time; /* mount time */ + unsigned long long min_mtime; /* min. modification time */ + unsigned long long max_mtime; /* max. modification time */ +}; + +struct free_segmap_info { + unsigned int start_segno; /* start segment number logically */ + unsigned int free_segments; /* # of free segments */ + unsigned int free_sections; /* # of free sections */ + rwlock_t segmap_lock; /* free segmap lock */ + unsigned long *free_segmap; /* free segment bitmap */ + unsigned long *free_secmap; /* free section bitmap */ +}; + +/* Notice: The order of dirty type is same with CURSEG_XXX in f2fs.h */ +enum dirty_type { + DIRTY_HOT_DATA, /* dirty segments assigned as hot data logs */ + DIRTY_WARM_DATA, /* dirty segments assigned as warm data logs */ + DIRTY_COLD_DATA, /* dirty segments assigned as cold data logs */ + DIRTY_HOT_NODE, /* dirty segments assigned as hot node logs */ + DIRTY_WARM_NODE, /* dirty segments assigned as warm node logs */ + DIRTY_COLD_NODE, /* dirty segments assigned as cold node logs */ + DIRTY, /* to count # of dirty segments */ + PRE, /* to count # of entirely obsolete segments */ + NR_DIRTY_TYPE +}; + +struct dirty_seglist_info { + const struct victim_selection *v_ops; /* victim selction operation */ + unsigned long *dirty_segmap[NR_DIRTY_TYPE]; + struct mutex seglist_lock; /* lock for segment bitmaps */ + int nr_dirty[NR_DIRTY_TYPE]; /* # of dirty segments */ + unsigned long *victim_segmap[2]; /* BG_GC, FG_GC */ +}; + +/* victim selection function for cleaning and SSR */ +struct victim_selection { + int (*get_victim)(struct f2fs_sb_info *, unsigned int *, + int, int, char); +}; + +/* for active log information */ +struct curseg_info { + struct mutex curseg_mutex; /* lock for consistency */ + struct f2fs_summary_block *sum_blk; /* cached summary block */ + unsigned char alloc_type; /* current allocation type */ + unsigned int segno; /* current segment number */ + unsigned short next_blkoff; /* next block offset to write */ + unsigned int zone; /* current zone number */ + unsigned int next_segno; /* preallocated segment */ +}; + +/* + * inline functions + */ +static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type) +{ + return (struct curseg_info *)(SM_I(sbi)->curseg_array + type); +} + +static inline struct seg_entry *get_seg_entry(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct sit_info *sit_i = SIT_I(sbi); + return &sit_i->sentries[segno]; +} + +static inline struct sec_entry *get_sec_entry(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct sit_info *sit_i = SIT_I(sbi); + return &sit_i->sec_entries[GET_SECNO(sbi, segno)]; +} + +static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi, + unsigned int segno, int section) +{ + /* + * In order to get # of valid blocks in a section instantly from many + * segments, f2fs manages two counting structures separately. + */ + if (section > 1) + return get_sec_entry(sbi, segno)->valid_blocks; + else + return get_seg_entry(sbi, segno)->valid_blocks; +} + +static inline void seg_info_from_raw_sit(struct seg_entry *se, + struct f2fs_sit_entry *rs) +{ + se->valid_blocks = GET_SIT_VBLOCKS(rs); + se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs); + memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); + memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); + se->type = GET_SIT_TYPE(rs); + se->mtime = le64_to_cpu(rs->mtime); +} + +static inline void seg_info_to_raw_sit(struct seg_entry *se, + struct f2fs_sit_entry *rs) +{ + unsigned short raw_vblocks = (se->type << SIT_VBLOCKS_SHIFT) | + se->valid_blocks; + rs->vblocks = cpu_to_le16(raw_vblocks); + memcpy(rs->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE); + memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); + se->ckpt_valid_blocks = se->valid_blocks; + rs->mtime = cpu_to_le64(se->mtime); +} + +static inline unsigned int find_next_inuse(struct free_segmap_info *free_i, + unsigned int max, unsigned int segno) +{ + unsigned int ret; + read_lock(&free_i->segmap_lock); + ret = find_next_bit(free_i->free_segmap, max, segno); + read_unlock(&free_i->segmap_lock); + return ret; +} + +static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int secno = segno / sbi->segs_per_sec; + unsigned int start_segno = secno * sbi->segs_per_sec; + unsigned int next; + + write_lock(&free_i->segmap_lock); + clear_bit(segno, free_i->free_segmap); + free_i->free_segments++; + + next = find_next_bit(free_i->free_segmap, TOTAL_SEGS(sbi), start_segno); + if (next >= start_segno + sbi->segs_per_sec) { + clear_bit(secno, free_i->free_secmap); + free_i->free_sections++; + } + write_unlock(&free_i->segmap_lock); +} + +static inline void __set_inuse(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int secno = segno / sbi->segs_per_sec; + set_bit(segno, free_i->free_segmap); + free_i->free_segments--; + if (!test_and_set_bit(secno, free_i->free_secmap)) + free_i->free_sections--; +} + +static inline void __set_test_and_free(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int secno = segno / sbi->segs_per_sec; + unsigned int start_segno = secno * sbi->segs_per_sec; + unsigned int next; + + write_lock(&free_i->segmap_lock); + if (test_and_clear_bit(segno, free_i->free_segmap)) { + free_i->free_segments++; + + next = find_next_bit(free_i->free_segmap, TOTAL_SEGS(sbi), + start_segno); + if (next >= start_segno + sbi->segs_per_sec) { + if (test_and_clear_bit(secno, free_i->free_secmap)) + free_i->free_sections++; + } + } + write_unlock(&free_i->segmap_lock); +} + +static inline void __set_test_and_inuse(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int secno = segno / sbi->segs_per_sec; + write_lock(&free_i->segmap_lock); + if (!test_and_set_bit(segno, free_i->free_segmap)) { + free_i->free_segments--; + if (!test_and_set_bit(secno, free_i->free_secmap)) + free_i->free_sections--; + } + write_unlock(&free_i->segmap_lock); +} + +static inline void get_sit_bitmap(struct f2fs_sb_info *sbi, + void *dst_addr) +{ + struct sit_info *sit_i = SIT_I(sbi); + memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size); +} + +static inline block_t written_block_count(struct f2fs_sb_info *sbi) +{ + struct sit_info *sit_i = SIT_I(sbi); + block_t vblocks; + + mutex_lock(&sit_i->sentry_lock); + vblocks = sit_i->written_valid_blocks; + mutex_unlock(&sit_i->sentry_lock); + + return vblocks; +} + +static inline unsigned int free_segments(struct f2fs_sb_info *sbi) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int free_segs; + + read_lock(&free_i->segmap_lock); + free_segs = free_i->free_segments; + read_unlock(&free_i->segmap_lock); + + return free_segs; +} + +static inline int reserved_segments(struct f2fs_sb_info *sbi) +{ + return SM_I(sbi)->reserved_segments; +} + +static inline unsigned int free_sections(struct f2fs_sb_info *sbi) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int free_secs; + + read_lock(&free_i->segmap_lock); + free_secs = free_i->free_sections; + read_unlock(&free_i->segmap_lock); + + return free_secs; +} + +static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi) +{ + return DIRTY_I(sbi)->nr_dirty[PRE]; +} + +static inline unsigned int dirty_segments(struct f2fs_sb_info *sbi) +{ + return DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_DATA] + + DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_DATA] + + DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_DATA] + + DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_NODE] + + DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_NODE] + + DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_NODE]; +} + +static inline int overprovision_segments(struct f2fs_sb_info *sbi) +{ + return SM_I(sbi)->ovp_segments; +} + +static inline int overprovision_sections(struct f2fs_sb_info *sbi) +{ + return ((unsigned int) overprovision_segments(sbi)) / sbi->segs_per_sec; +} + +static inline int reserved_sections(struct f2fs_sb_info *sbi) +{ + return ((unsigned int) reserved_segments(sbi)) / sbi->segs_per_sec; +} + +static inline bool need_SSR(struct f2fs_sb_info *sbi) +{ + return (free_sections(sbi) < overprovision_sections(sbi)); +} + +static inline int get_ssr_segment(struct f2fs_sb_info *sbi, int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + return DIRTY_I(sbi)->v_ops->get_victim(sbi, + &(curseg)->next_segno, BG_GC, type, SSR); +} + +static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi) +{ + unsigned int pages_per_sec = (1 << sbi->log_blocks_per_seg) * + sbi->segs_per_sec; + int node_secs = ((get_pages(sbi, F2FS_DIRTY_NODES) + pages_per_sec - 1) + >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; + int dent_secs = ((get_pages(sbi, F2FS_DIRTY_DENTS) + pages_per_sec - 1) + >> sbi->log_blocks_per_seg) / sbi->segs_per_sec; + + if (sbi->por_doing) + return false; + + if (free_sections(sbi) <= (node_secs + 2 * dent_secs + + reserved_sections(sbi))) + return true; + return false; +} + +static inline int utilization(struct f2fs_sb_info *sbi) +{ + return (long int)valid_user_blocks(sbi) * 100 / + (long int)sbi->user_block_count; +} + +/* + * Sometimes f2fs may be better to drop out-of-place update policy. + * So, if fs utilization is over MIN_IPU_UTIL, then f2fs tries to write + * data in the original place likewise other traditional file systems. + * But, currently set 100 in percentage, which means it is disabled. + * See below need_inplace_update(). + */ +#define MIN_IPU_UTIL 100 +static inline bool need_inplace_update(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + if (S_ISDIR(inode->i_mode)) + return false; + if (need_SSR(sbi) && utilization(sbi) > MIN_IPU_UTIL) + return true; + return false; +} + +static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi, + int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + return curseg->segno; +} + +static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi, + int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + return curseg->alloc_type; +} + +static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + return curseg->next_blkoff; +} + +static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno) +{ + unsigned int end_segno = SM_I(sbi)->segment_count - 1; + BUG_ON(segno > end_segno); +} + +/* + * This function is used for only debugging. + * NOTE: In future, we have to remove this function. + */ +static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr) +{ + struct f2fs_sm_info *sm_info = SM_I(sbi); + block_t total_blks = sm_info->segment_count << sbi->log_blocks_per_seg; + block_t start_addr = sm_info->seg0_blkaddr; + block_t end_addr = start_addr + total_blks - 1; + BUG_ON(blk_addr < start_addr); + BUG_ON(blk_addr > end_addr); +} + +/* + * Summary block is always treated as invalid block + */ +static inline void check_block_count(struct f2fs_sb_info *sbi, + int segno, struct f2fs_sit_entry *raw_sit) +{ + struct f2fs_sm_info *sm_info = SM_I(sbi); + unsigned int end_segno = sm_info->segment_count - 1; + int valid_blocks = 0; + int i; + + /* check segment usage */ + BUG_ON(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg); + + /* check boundary of a given segment number */ + BUG_ON(segno > end_segno); + + /* check bitmap with valid block count */ + for (i = 0; i < sbi->blocks_per_seg; i++) + if (f2fs_test_bit(i, raw_sit->valid_map)) + valid_blocks++; + BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks); +} + +static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi, + unsigned int start) +{ + struct sit_info *sit_i = SIT_I(sbi); + unsigned int offset = SIT_BLOCK_OFFSET(sit_i, start); + block_t blk_addr = sit_i->sit_base_addr + offset; + + check_seg_range(sbi, start); + + /* calculate sit block address */ + if (f2fs_test_bit(offset, sit_i->sit_bitmap)) + blk_addr += sit_i->sit_blocks; + + return blk_addr; +} + +static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi, + pgoff_t block_addr) +{ + struct sit_info *sit_i = SIT_I(sbi); + block_addr -= sit_i->sit_base_addr; + if (block_addr < sit_i->sit_blocks) + block_addr += sit_i->sit_blocks; + else + block_addr -= sit_i->sit_blocks; + + return block_addr + sit_i->sit_base_addr; +} + +static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start) +{ + unsigned int block_off = SIT_BLOCK_OFFSET(sit_i, start); + + if (f2fs_test_bit(block_off, sit_i->sit_bitmap)) + f2fs_clear_bit(block_off, sit_i->sit_bitmap); + else + f2fs_set_bit(block_off, sit_i->sit_bitmap); +} + +static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi) +{ + struct sit_info *sit_i = SIT_I(sbi); + return sit_i->elapsed_time + CURRENT_TIME_SEC.tv_sec - + sit_i->mounted_time; +} + +static inline void set_summary(struct f2fs_summary *sum, nid_t nid, + unsigned int ofs_in_node, unsigned char version) +{ + sum->nid = cpu_to_le32(nid); + sum->ofs_in_node = cpu_to_le16(ofs_in_node); + sum->version = version; +} + +static inline block_t start_sum_block(struct f2fs_sb_info *sbi) +{ + return __start_cp_addr(sbi) + + le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); +} + +static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type) +{ + return __start_cp_addr(sbi) + + le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count) + - (base + 1) + type; +} diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c new file mode 100644 index 00000000000..37fad04c866 --- /dev/null +++ b/fs/f2fs/super.c @@ -0,0 +1,701 @@ +/* + * fs/f2fs/super.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/statfs.h> +#include <linux/proc_fs.h> +#include <linux/buffer_head.h> +#include <linux/backing-dev.h> +#include <linux/kthread.h> +#include <linux/parser.h> +#include <linux/mount.h> +#include <linux/seq_file.h> +#include <linux/random.h> +#include <linux/exportfs.h> +#include <linux/f2fs_fs.h> + +#include "f2fs.h" +#include "node.h" +#include "xattr.h" + +static struct kmem_cache *f2fs_inode_cachep; + +enum { + Opt_gc_background_off, + Opt_disable_roll_forward, + Opt_discard, + Opt_noheap, + Opt_nouser_xattr, + Opt_noacl, + Opt_active_logs, + Opt_disable_ext_identify, + Opt_err, +}; + +static match_table_t f2fs_tokens = { + {Opt_gc_background_off, "background_gc_off"}, + {Opt_disable_roll_forward, "disable_roll_forward"}, + {Opt_discard, "discard"}, + {Opt_noheap, "no_heap"}, + {Opt_nouser_xattr, "nouser_xattr"}, + {Opt_noacl, "noacl"}, + {Opt_active_logs, "active_logs=%u"}, + {Opt_disable_ext_identify, "disable_ext_identify"}, + {Opt_err, NULL}, +}; + +void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); + va_end(args); +} + +static void init_once(void *foo) +{ + struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; + + inode_init_once(&fi->vfs_inode); +} + +static struct inode *f2fs_alloc_inode(struct super_block *sb) +{ + struct f2fs_inode_info *fi; + + fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO); + if (!fi) + return NULL; + + init_once((void *) fi); + + /* Initilize f2fs-specific inode info */ + fi->vfs_inode.i_version = 1; + atomic_set(&fi->dirty_dents, 0); + fi->i_current_depth = 1; + fi->i_advise = 0; + rwlock_init(&fi->ext.ext_lock); + + set_inode_flag(fi, FI_NEW_INODE); + + return &fi->vfs_inode; +} + +static void f2fs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); +} + +static void f2fs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, f2fs_i_callback); +} + +static void f2fs_put_super(struct super_block *sb) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + + f2fs_destroy_stats(sbi); + stop_gc_thread(sbi); + + write_checkpoint(sbi, false, true); + + iput(sbi->node_inode); + iput(sbi->meta_inode); + + /* destroy f2fs internal modules */ + destroy_node_manager(sbi); + destroy_segment_manager(sbi); + + kfree(sbi->ckpt); + + sb->s_fs_info = NULL; + brelse(sbi->raw_super_buf); + kfree(sbi); +} + +int f2fs_sync_fs(struct super_block *sb, int sync) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + + if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) + return 0; + + if (sync) + write_checkpoint(sbi, false, false); + else + f2fs_balance_fs(sbi); + + return 0; +} + +static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + struct super_block *sb = dentry->d_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + u64 id = huge_encode_dev(sb->s_bdev->bd_dev); + block_t total_count, user_block_count, start_count, ovp_count; + + total_count = le64_to_cpu(sbi->raw_super->block_count); + user_block_count = sbi->user_block_count; + start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); + ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; + buf->f_type = F2FS_SUPER_MAGIC; + buf->f_bsize = sbi->blocksize; + + buf->f_blocks = total_count - start_count; + buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; + buf->f_bavail = user_block_count - valid_user_blocks(sbi); + + buf->f_files = sbi->total_node_count; + buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); + + buf->f_namelen = F2FS_MAX_NAME_LEN; + buf->f_fsid.val[0] = (u32)id; + buf->f_fsid.val[1] = (u32)(id >> 32); + + return 0; +} + +static int f2fs_show_options(struct seq_file *seq, struct dentry *root) +{ + struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); + + if (test_opt(sbi, BG_GC)) + seq_puts(seq, ",background_gc_on"); + else + seq_puts(seq, ",background_gc_off"); + if (test_opt(sbi, DISABLE_ROLL_FORWARD)) + seq_puts(seq, ",disable_roll_forward"); + if (test_opt(sbi, DISCARD)) + seq_puts(seq, ",discard"); + if (test_opt(sbi, NOHEAP)) + seq_puts(seq, ",no_heap_alloc"); +#ifdef CONFIG_F2FS_FS_XATTR + if (test_opt(sbi, XATTR_USER)) + seq_puts(seq, ",user_xattr"); + else + seq_puts(seq, ",nouser_xattr"); +#endif +#ifdef CONFIG_F2FS_FS_POSIX_ACL + if (test_opt(sbi, POSIX_ACL)) + seq_puts(seq, ",acl"); + else + seq_puts(seq, ",noacl"); +#endif + if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) + seq_puts(seq, ",disable_ext_indentify"); + + seq_printf(seq, ",active_logs=%u", sbi->active_logs); + + return 0; +} + +static struct super_operations f2fs_sops = { + .alloc_inode = f2fs_alloc_inode, + .destroy_inode = f2fs_destroy_inode, + .write_inode = f2fs_write_inode, + .show_options = f2fs_show_options, + .evict_inode = f2fs_evict_inode, + .put_super = f2fs_put_super, + .sync_fs = f2fs_sync_fs, + .statfs = f2fs_statfs, +}; + +static struct inode *f2fs_nfs_get_inode(struct super_block *sb, + u64 ino, u32 generation) +{ + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + + if (ino < F2FS_ROOT_INO(sbi)) + return ERR_PTR(-ESTALE); + + /* + * f2fs_iget isn't quite right if the inode is currently unallocated! + * However f2fs_iget currently does appropriate checks to handle stale + * inodes so everything is OK. + */ + inode = f2fs_iget(sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); + if (generation && inode->i_generation != generation) { + /* we didn't find the right inode.. */ + iput(inode); + return ERR_PTR(-ESTALE); + } + return inode; +} + +static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_dentry(sb, fid, fh_len, fh_type, + f2fs_nfs_get_inode); +} + +static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_parent(sb, fid, fh_len, fh_type, + f2fs_nfs_get_inode); +} + +static const struct export_operations f2fs_export_ops = { + .fh_to_dentry = f2fs_fh_to_dentry, + .fh_to_parent = f2fs_fh_to_parent, + .get_parent = f2fs_get_parent, +}; + +static int parse_options(struct super_block *sb, struct f2fs_sb_info *sbi, + char *options) +{ + substring_t args[MAX_OPT_ARGS]; + char *p; + int arg = 0; + + if (!options) + return 0; + + while ((p = strsep(&options, ",")) != NULL) { + int token; + if (!*p) + continue; + /* + * Initialize args struct so we know whether arg was + * found; some options take optional arguments. + */ + args[0].to = args[0].from = NULL; + token = match_token(p, f2fs_tokens, args); + + switch (token) { + case Opt_gc_background_off: + clear_opt(sbi, BG_GC); + break; + case Opt_disable_roll_forward: + set_opt(sbi, DISABLE_ROLL_FORWARD); + break; + case Opt_discard: + set_opt(sbi, DISCARD); + break; + case Opt_noheap: + set_opt(sbi, NOHEAP); + break; +#ifdef CONFIG_F2FS_FS_XATTR + case Opt_nouser_xattr: + clear_opt(sbi, XATTR_USER); + break; +#else + case Opt_nouser_xattr: + f2fs_msg(sb, KERN_INFO, + "nouser_xattr options not supported"); + break; +#endif +#ifdef CONFIG_F2FS_FS_POSIX_ACL + case Opt_noacl: + clear_opt(sbi, POSIX_ACL); + break; +#else + case Opt_noacl: + f2fs_msg(sb, KERN_INFO, "noacl options not supported"); + break; +#endif + case Opt_active_logs: + if (args->from && match_int(args, &arg)) + return -EINVAL; + if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) + return -EINVAL; + sbi->active_logs = arg; + break; + case Opt_disable_ext_identify: + set_opt(sbi, DISABLE_EXT_IDENTIFY); + break; + default: + f2fs_msg(sb, KERN_ERR, + "Unrecognized mount option \"%s\" or missing value", + p); + return -EINVAL; + } + } + return 0; +} + +static loff_t max_file_size(unsigned bits) +{ + loff_t result = ADDRS_PER_INODE; + loff_t leaf_count = ADDRS_PER_BLOCK; + + /* two direct node blocks */ + result += (leaf_count * 2); + + /* two indirect node blocks */ + leaf_count *= NIDS_PER_BLOCK; + result += (leaf_count * 2); + + /* one double indirect node block */ + leaf_count *= NIDS_PER_BLOCK; + result += leaf_count; + + result <<= bits; + return result; +} + +static int sanity_check_raw_super(struct super_block *sb, + struct f2fs_super_block *raw_super) +{ + unsigned int blocksize; + + if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { + f2fs_msg(sb, KERN_INFO, + "Magic Mismatch, valid(0x%x) - read(0x%x)", + F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); + return 1; + } + + /* Currently, support only 4KB block size */ + blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); + if (blocksize != PAGE_CACHE_SIZE) { + f2fs_msg(sb, KERN_INFO, + "Invalid blocksize (%u), supports only 4KB\n", + blocksize); + return 1; + } + if (le32_to_cpu(raw_super->log_sectorsize) != + F2FS_LOG_SECTOR_SIZE) { + f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); + return 1; + } + if (le32_to_cpu(raw_super->log_sectors_per_block) != + F2FS_LOG_SECTORS_PER_BLOCK) { + f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); + return 1; + } + return 0; +} + +static int sanity_check_ckpt(struct f2fs_super_block *raw_super, + struct f2fs_checkpoint *ckpt) +{ + unsigned int total, fsmeta; + + total = le32_to_cpu(raw_super->segment_count); + fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); + fsmeta += le32_to_cpu(raw_super->segment_count_sit); + fsmeta += le32_to_cpu(raw_super->segment_count_nat); + fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); + fsmeta += le32_to_cpu(raw_super->segment_count_ssa); + + if (fsmeta >= total) + return 1; + return 0; +} + +static void init_sb_info(struct f2fs_sb_info *sbi) +{ + struct f2fs_super_block *raw_super = sbi->raw_super; + int i; + + sbi->log_sectors_per_block = + le32_to_cpu(raw_super->log_sectors_per_block); + sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); + sbi->blocksize = 1 << sbi->log_blocksize; + sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); + sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; + sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); + sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); + sbi->total_sections = le32_to_cpu(raw_super->section_count); + sbi->total_node_count = + (le32_to_cpu(raw_super->segment_count_nat) / 2) + * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; + sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); + sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); + sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); + + for (i = 0; i < NR_COUNT_TYPE; i++) + atomic_set(&sbi->nr_pages[i], 0); +} + +static int f2fs_fill_super(struct super_block *sb, void *data, int silent) +{ + struct f2fs_sb_info *sbi; + struct f2fs_super_block *raw_super; + struct buffer_head *raw_super_buf; + struct inode *root; + long err = -EINVAL; + int i; + + /* allocate memory for f2fs-specific super block info */ + sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); + if (!sbi) + return -ENOMEM; + + /* set a block size */ + if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) { + f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); + goto free_sbi; + } + + /* read f2fs raw super block */ + raw_super_buf = sb_bread(sb, 0); + if (!raw_super_buf) { + err = -EIO; + f2fs_msg(sb, KERN_ERR, "unable to read superblock"); + goto free_sbi; + } + raw_super = (struct f2fs_super_block *) + ((char *)raw_super_buf->b_data + F2FS_SUPER_OFFSET); + + /* init some FS parameters */ + sbi->active_logs = NR_CURSEG_TYPE; + + set_opt(sbi, BG_GC); + +#ifdef CONFIG_F2FS_FS_XATTR + set_opt(sbi, XATTR_USER); +#endif +#ifdef CONFIG_F2FS_FS_POSIX_ACL + set_opt(sbi, POSIX_ACL); +#endif + /* parse mount options */ + if (parse_options(sb, sbi, (char *)data)) + goto free_sb_buf; + + /* sanity checking of raw super */ + if (sanity_check_raw_super(sb, raw_super)) { + f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem"); + goto free_sb_buf; + } + + sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); + sb->s_max_links = F2FS_LINK_MAX; + get_random_bytes(&sbi->s_next_generation, sizeof(u32)); + + sb->s_op = &f2fs_sops; + sb->s_xattr = f2fs_xattr_handlers; + sb->s_export_op = &f2fs_export_ops; + sb->s_magic = F2FS_SUPER_MAGIC; + sb->s_fs_info = sbi; + sb->s_time_gran = 1; + sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | + (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); + memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); + + /* init f2fs-specific super block info */ + sbi->sb = sb; + sbi->raw_super = raw_super; + sbi->raw_super_buf = raw_super_buf; + mutex_init(&sbi->gc_mutex); + mutex_init(&sbi->write_inode); + mutex_init(&sbi->writepages); + mutex_init(&sbi->cp_mutex); + for (i = 0; i < NR_LOCK_TYPE; i++) + mutex_init(&sbi->fs_lock[i]); + sbi->por_doing = 0; + spin_lock_init(&sbi->stat_lock); + init_rwsem(&sbi->bio_sem); + init_sb_info(sbi); + + /* get an inode for meta space */ + sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); + if (IS_ERR(sbi->meta_inode)) { + f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); + err = PTR_ERR(sbi->meta_inode); + goto free_sb_buf; + } + + err = get_valid_checkpoint(sbi); + if (err) { + f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); + goto free_meta_inode; + } + + /* sanity checking of checkpoint */ + err = -EINVAL; + if (sanity_check_ckpt(raw_super, sbi->ckpt)) { + f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); + goto free_cp; + } + + sbi->total_valid_node_count = + le32_to_cpu(sbi->ckpt->valid_node_count); + sbi->total_valid_inode_count = + le32_to_cpu(sbi->ckpt->valid_inode_count); + sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); + sbi->total_valid_block_count = + le64_to_cpu(sbi->ckpt->valid_block_count); + sbi->last_valid_block_count = sbi->total_valid_block_count; + sbi->alloc_valid_block_count = 0; + INIT_LIST_HEAD(&sbi->dir_inode_list); + spin_lock_init(&sbi->dir_inode_lock); + + init_orphan_info(sbi); + + /* setup f2fs internal modules */ + err = build_segment_manager(sbi); + if (err) { + f2fs_msg(sb, KERN_ERR, + "Failed to initialize F2FS segment manager"); + goto free_sm; + } + err = build_node_manager(sbi); + if (err) { + f2fs_msg(sb, KERN_ERR, + "Failed to initialize F2FS node manager"); + goto free_nm; + } + + build_gc_manager(sbi); + + /* get an inode for node space */ + sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); + if (IS_ERR(sbi->node_inode)) { + f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); + err = PTR_ERR(sbi->node_inode); + goto free_nm; + } + + /* if there are nt orphan nodes free them */ + err = -EINVAL; + if (recover_orphan_inodes(sbi)) + goto free_node_inode; + + /* read root inode and dentry */ + root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); + if (IS_ERR(root)) { + f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); + err = PTR_ERR(root); + goto free_node_inode; + } + if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) + goto free_root_inode; + + sb->s_root = d_make_root(root); /* allocate root dentry */ + if (!sb->s_root) { + err = -ENOMEM; + goto free_root_inode; + } + + /* recover fsynced data */ + if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) + recover_fsync_data(sbi); + + /* After POR, we can run background GC thread */ + err = start_gc_thread(sbi); + if (err) + goto fail; + + err = f2fs_build_stats(sbi); + if (err) + goto fail; + + return 0; +fail: + stop_gc_thread(sbi); +free_root_inode: + dput(sb->s_root); + sb->s_root = NULL; +free_node_inode: + iput(sbi->node_inode); +free_nm: + destroy_node_manager(sbi); +free_sm: + destroy_segment_manager(sbi); +free_cp: + kfree(sbi->ckpt); +free_meta_inode: + make_bad_inode(sbi->meta_inode); + iput(sbi->meta_inode); +free_sb_buf: + brelse(raw_super_buf); +free_sbi: + kfree(sbi); + return err; +} + +static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) +{ + return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); +} + +static struct file_system_type f2fs_fs_type = { + .owner = THIS_MODULE, + .name = "f2fs", + .mount = f2fs_mount, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; + +static int __init init_inodecache(void) +{ + f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", + sizeof(struct f2fs_inode_info), NULL); + if (f2fs_inode_cachep == NULL) + return -ENOMEM; + return 0; +} + +static void destroy_inodecache(void) +{ + /* + * Make sure all delayed rcu free inodes are flushed before we + * destroy cache. + */ + rcu_barrier(); + kmem_cache_destroy(f2fs_inode_cachep); +} + +static int __init init_f2fs_fs(void) +{ + int err; + + err = init_inodecache(); + if (err) + goto fail; + err = create_node_manager_caches(); + if (err) + goto fail; + err = create_gc_caches(); + if (err) + goto fail; + err = create_checkpoint_caches(); + if (err) + goto fail; + err = register_filesystem(&f2fs_fs_type); + if (err) + goto fail; + f2fs_create_root_stats(); +fail: + return err; +} + +static void __exit exit_f2fs_fs(void) +{ + f2fs_destroy_root_stats(); + unregister_filesystem(&f2fs_fs_type); + destroy_checkpoint_caches(); + destroy_gc_caches(); + destroy_node_manager_caches(); + destroy_inodecache(); +} + +module_init(init_f2fs_fs) +module_exit(exit_f2fs_fs) + +MODULE_AUTHOR("Samsung Electronics's Praesto Team"); +MODULE_DESCRIPTION("Flash Friendly File System"); +MODULE_LICENSE("GPL"); diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c new file mode 100644 index 00000000000..8038c049650 --- /dev/null +++ b/fs/f2fs/xattr.c @@ -0,0 +1,443 @@ +/* + * fs/f2fs/xattr.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * Portions of this code from linux/fs/ext2/xattr.c + * + * Copyright (C) 2001-2003 Andreas Gruenbacher <agruen@suse.de> + * + * Fix by Harrison Xing <harrison@mountainviewdata.com>. + * Extended attributes for symlinks and special files added per + * suggestion of Luka Renko <luka.renko@hermes.si>. + * xattr consolidation Copyright (c) 2004 James Morris <jmorris@redhat.com>, + * Red Hat Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/rwsem.h> +#include <linux/f2fs_fs.h> +#include "f2fs.h" +#include "xattr.h" + +static size_t f2fs_xattr_generic_list(struct dentry *dentry, char *list, + size_t list_size, const char *name, size_t name_len, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); + int total_len, prefix_len = 0; + const char *prefix = NULL; + + switch (type) { + case F2FS_XATTR_INDEX_USER: + if (!test_opt(sbi, XATTR_USER)) + return -EOPNOTSUPP; + prefix = XATTR_USER_PREFIX; + prefix_len = XATTR_USER_PREFIX_LEN; + break; + case F2FS_XATTR_INDEX_TRUSTED: + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + prefix = XATTR_TRUSTED_PREFIX; + prefix_len = XATTR_TRUSTED_PREFIX_LEN; + break; + default: + return -EINVAL; + } + + total_len = prefix_len + name_len + 1; + if (list && total_len <= list_size) { + memcpy(list, prefix, prefix_len); + memcpy(list+prefix_len, name, name_len); + list[prefix_len + name_len] = '\0'; + } + return total_len; +} + +static int f2fs_xattr_generic_get(struct dentry *dentry, const char *name, + void *buffer, size_t size, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); + + switch (type) { + case F2FS_XATTR_INDEX_USER: + if (!test_opt(sbi, XATTR_USER)) + return -EOPNOTSUPP; + break; + case F2FS_XATTR_INDEX_TRUSTED: + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + break; + default: + return -EINVAL; + } + if (strcmp(name, "") == 0) + return -EINVAL; + return f2fs_getxattr(dentry->d_inode, type, name, + buffer, size); +} + +static int f2fs_xattr_generic_set(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags, int type) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); + + switch (type) { + case F2FS_XATTR_INDEX_USER: + if (!test_opt(sbi, XATTR_USER)) + return -EOPNOTSUPP; + break; + case F2FS_XATTR_INDEX_TRUSTED: + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + break; + default: + return -EINVAL; + } + if (strcmp(name, "") == 0) + return -EINVAL; + + return f2fs_setxattr(dentry->d_inode, type, name, value, size); +} + +static size_t f2fs_xattr_advise_list(struct dentry *dentry, char *list, + size_t list_size, const char *name, size_t name_len, int type) +{ + const char *xname = F2FS_SYSTEM_ADVISE_PREFIX; + size_t size; + + if (type != F2FS_XATTR_INDEX_ADVISE) + return 0; + + size = strlen(xname) + 1; + if (list && size <= list_size) + memcpy(list, xname, size); + return size; +} + +static int f2fs_xattr_advise_get(struct dentry *dentry, const char *name, + void *buffer, size_t size, int type) +{ + struct inode *inode = dentry->d_inode; + + if (strcmp(name, "") != 0) + return -EINVAL; + + *((char *)buffer) = F2FS_I(inode)->i_advise; + return sizeof(char); +} + +static int f2fs_xattr_advise_set(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags, int type) +{ + struct inode *inode = dentry->d_inode; + + if (strcmp(name, "") != 0) + return -EINVAL; + if (!inode_owner_or_capable(inode)) + return -EPERM; + if (value == NULL) + return -EINVAL; + + F2FS_I(inode)->i_advise |= *(char *)value; + return 0; +} + +const struct xattr_handler f2fs_xattr_user_handler = { + .prefix = XATTR_USER_PREFIX, + .flags = F2FS_XATTR_INDEX_USER, + .list = f2fs_xattr_generic_list, + .get = f2fs_xattr_generic_get, + .set = f2fs_xattr_generic_set, +}; + +const struct xattr_handler f2fs_xattr_trusted_handler = { + .prefix = XATTR_TRUSTED_PREFIX, + .flags = F2FS_XATTR_INDEX_TRUSTED, + .list = f2fs_xattr_generic_list, + .get = f2fs_xattr_generic_get, + .set = f2fs_xattr_generic_set, +}; + +const struct xattr_handler f2fs_xattr_advise_handler = { + .prefix = F2FS_SYSTEM_ADVISE_PREFIX, + .flags = F2FS_XATTR_INDEX_ADVISE, + .list = f2fs_xattr_advise_list, + .get = f2fs_xattr_advise_get, + .set = f2fs_xattr_advise_set, +}; + +static const struct xattr_handler *f2fs_xattr_handler_map[] = { + [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler, +#ifdef CONFIG_F2FS_FS_POSIX_ACL + [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &f2fs_xattr_acl_access_handler, + [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &f2fs_xattr_acl_default_handler, +#endif + [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler, + [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler, +}; + +const struct xattr_handler *f2fs_xattr_handlers[] = { + &f2fs_xattr_user_handler, +#ifdef CONFIG_F2FS_FS_POSIX_ACL + &f2fs_xattr_acl_access_handler, + &f2fs_xattr_acl_default_handler, +#endif + &f2fs_xattr_trusted_handler, + &f2fs_xattr_advise_handler, + NULL, +}; + +static inline const struct xattr_handler *f2fs_xattr_handler(int name_index) +{ + const struct xattr_handler *handler = NULL; + + if (name_index > 0 && name_index < ARRAY_SIZE(f2fs_xattr_handler_map)) + handler = f2fs_xattr_handler_map[name_index]; + return handler; +} + +int f2fs_getxattr(struct inode *inode, int name_index, const char *name, + void *buffer, size_t buffer_size) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_inode_info *fi = F2FS_I(inode); + struct f2fs_xattr_entry *entry; + struct page *page; + void *base_addr; + int error = 0, found = 0; + size_t value_len, name_len; + + if (name == NULL) + return -EINVAL; + name_len = strlen(name); + + if (!fi->i_xattr_nid) + return -ENODATA; + + page = get_node_page(sbi, fi->i_xattr_nid); + base_addr = page_address(page); + + list_for_each_xattr(entry, base_addr) { + if (entry->e_name_index != name_index) + continue; + if (entry->e_name_len != name_len) + continue; + if (!memcmp(entry->e_name, name, name_len)) { + found = 1; + break; + } + } + if (!found) { + error = -ENODATA; + goto cleanup; + } + + value_len = le16_to_cpu(entry->e_value_size); + + if (buffer && value_len > buffer_size) { + error = -ERANGE; + goto cleanup; + } + + if (buffer) { + char *pval = entry->e_name + entry->e_name_len; + memcpy(buffer, pval, value_len); + } + error = value_len; + +cleanup: + f2fs_put_page(page, 1); + return error; +} + +ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) +{ + struct inode *inode = dentry->d_inode; + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_inode_info *fi = F2FS_I(inode); + struct f2fs_xattr_entry *entry; + struct page *page; + void *base_addr; + int error = 0; + size_t rest = buffer_size; + + if (!fi->i_xattr_nid) + return 0; + + page = get_node_page(sbi, fi->i_xattr_nid); + base_addr = page_address(page); + + list_for_each_xattr(entry, base_addr) { + const struct xattr_handler *handler = + f2fs_xattr_handler(entry->e_name_index); + size_t size; + + if (!handler) + continue; + + size = handler->list(dentry, buffer, rest, entry->e_name, + entry->e_name_len, handler->flags); + if (buffer && size > rest) { + error = -ERANGE; + goto cleanup; + } + + if (buffer) + buffer += size; + rest -= size; + } + error = buffer_size - rest; +cleanup: + f2fs_put_page(page, 1); + return error; +} + +int f2fs_setxattr(struct inode *inode, int name_index, const char *name, + const void *value, size_t value_len) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + struct f2fs_inode_info *fi = F2FS_I(inode); + struct f2fs_xattr_header *header = NULL; + struct f2fs_xattr_entry *here, *last; + struct page *page; + void *base_addr; + int error, found, free, newsize; + size_t name_len; + char *pval; + + if (name == NULL) + return -EINVAL; + name_len = strlen(name); + + if (value == NULL) + value_len = 0; + + if (name_len > 255 || value_len > MAX_VALUE_LEN) + return -ERANGE; + + f2fs_balance_fs(sbi); + + mutex_lock_op(sbi, NODE_NEW); + if (!fi->i_xattr_nid) { + /* Allocate new attribute block */ + struct dnode_of_data dn; + + if (!alloc_nid(sbi, &fi->i_xattr_nid)) { + mutex_unlock_op(sbi, NODE_NEW); + return -ENOSPC; + } + set_new_dnode(&dn, inode, NULL, NULL, fi->i_xattr_nid); + mark_inode_dirty(inode); + + page = new_node_page(&dn, XATTR_NODE_OFFSET); + if (IS_ERR(page)) { + alloc_nid_failed(sbi, fi->i_xattr_nid); + fi->i_xattr_nid = 0; + mutex_unlock_op(sbi, NODE_NEW); + return PTR_ERR(page); + } + + alloc_nid_done(sbi, fi->i_xattr_nid); + base_addr = page_address(page); + header = XATTR_HDR(base_addr); + header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); + header->h_refcount = cpu_to_le32(1); + } else { + /* The inode already has an extended attribute block. */ + page = get_node_page(sbi, fi->i_xattr_nid); + if (IS_ERR(page)) { + mutex_unlock_op(sbi, NODE_NEW); + return PTR_ERR(page); + } + + base_addr = page_address(page); + header = XATTR_HDR(base_addr); + } + + if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { + error = -EIO; + goto cleanup; + } + + /* find entry with wanted name. */ + found = 0; + list_for_each_xattr(here, base_addr) { + if (here->e_name_index != name_index) + continue; + if (here->e_name_len != name_len) + continue; + if (!memcmp(here->e_name, name, name_len)) { + found = 1; + break; + } + } + + last = here; + + while (!IS_XATTR_LAST_ENTRY(last)) + last = XATTR_NEXT_ENTRY(last); + + newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + + name_len + value_len); + + /* 1. Check space */ + if (value) { + /* If value is NULL, it is remove operation. + * In case of update operation, we caculate free. + */ + free = MIN_OFFSET - ((char *)last - (char *)header); + if (found) + free = free - ENTRY_SIZE(here); + + if (free < newsize) { + error = -ENOSPC; + goto cleanup; + } + } + + /* 2. Remove old entry */ + if (found) { + /* If entry is found, remove old entry. + * If not found, remove operation is not needed. + */ + struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here); + int oldsize = ENTRY_SIZE(here); + + memmove(here, next, (char *)last - (char *)next); + last = (struct f2fs_xattr_entry *)((char *)last - oldsize); + memset(last, 0, oldsize); + } + + /* 3. Write new entry */ + if (value) { + /* Before we come here, old entry is removed. + * We just write new entry. */ + memset(last, 0, newsize); + last->e_name_index = name_index; + last->e_name_len = name_len; + memcpy(last->e_name, name, name_len); + pval = last->e_name + name_len; + memcpy(pval, value, value_len); + last->e_value_size = cpu_to_le16(value_len); + } + + set_page_dirty(page); + f2fs_put_page(page, 1); + + if (is_inode_flag_set(fi, FI_ACL_MODE)) { + inode->i_mode = fi->i_acl_mode; + inode->i_ctime = CURRENT_TIME; + clear_inode_flag(fi, FI_ACL_MODE); + } + f2fs_write_inode(inode, NULL); + mutex_unlock_op(sbi, NODE_NEW); + + return 0; +cleanup: + f2fs_put_page(page, 1); + mutex_unlock_op(sbi, NODE_NEW); + return error; +} diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h new file mode 100644 index 00000000000..49c9558305e --- /dev/null +++ b/fs/f2fs/xattr.h @@ -0,0 +1,145 @@ +/* + * fs/f2fs/xattr.h + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * Portions of this code from linux/fs/ext2/xattr.h + * + * On-disk format of extended attributes for the ext2 filesystem. + * + * (C) 2001 Andreas Gruenbacher, <a.gruenbacher@computer.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __F2FS_XATTR_H__ +#define __F2FS_XATTR_H__ + +#include <linux/init.h> +#include <linux/xattr.h> + +/* Magic value in attribute blocks */ +#define F2FS_XATTR_MAGIC 0xF2F52011 + +/* Maximum number of references to one attribute block */ +#define F2FS_XATTR_REFCOUNT_MAX 1024 + +/* Name indexes */ +#define F2FS_SYSTEM_ADVISE_PREFIX "system.advise" +#define F2FS_XATTR_INDEX_USER 1 +#define F2FS_XATTR_INDEX_POSIX_ACL_ACCESS 2 +#define F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT 3 +#define F2FS_XATTR_INDEX_TRUSTED 4 +#define F2FS_XATTR_INDEX_LUSTRE 5 +#define F2FS_XATTR_INDEX_SECURITY 6 +#define F2FS_XATTR_INDEX_ADVISE 7 + +struct f2fs_xattr_header { + __le32 h_magic; /* magic number for identification */ + __le32 h_refcount; /* reference count */ + __u32 h_reserved[4]; /* zero right now */ +}; + +struct f2fs_xattr_entry { + __u8 e_name_index; + __u8 e_name_len; + __le16 e_value_size; /* size of attribute value */ + char e_name[0]; /* attribute name */ +}; + +#define XATTR_HDR(ptr) ((struct f2fs_xattr_header *)(ptr)) +#define XATTR_ENTRY(ptr) ((struct f2fs_xattr_entry *)(ptr)) +#define XATTR_FIRST_ENTRY(ptr) (XATTR_ENTRY(XATTR_HDR(ptr)+1)) +#define XATTR_ROUND (3) + +#define XATTR_ALIGN(size) ((size + XATTR_ROUND) & ~XATTR_ROUND) + +#define ENTRY_SIZE(entry) (XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + \ + entry->e_name_len + le16_to_cpu(entry->e_value_size))) + +#define XATTR_NEXT_ENTRY(entry) ((struct f2fs_xattr_entry *)((char *)(entry) +\ + ENTRY_SIZE(entry))) + +#define IS_XATTR_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0) + +#define list_for_each_xattr(entry, addr) \ + for (entry = XATTR_FIRST_ENTRY(addr);\ + !IS_XATTR_LAST_ENTRY(entry);\ + entry = XATTR_NEXT_ENTRY(entry)) + + +#define MIN_OFFSET XATTR_ALIGN(PAGE_SIZE - \ + sizeof(struct node_footer) - \ + sizeof(__u32)) + +#define MAX_VALUE_LEN (MIN_OFFSET - sizeof(struct f2fs_xattr_header) - \ + sizeof(struct f2fs_xattr_entry)) + +/* + * On-disk structure of f2fs_xattr + * We use only 1 block for xattr. + * + * +--------------------+ + * | f2fs_xattr_header | + * | | + * +--------------------+ + * | f2fs_xattr_entry | + * | .e_name_index = 1 | + * | .e_name_len = 3 | + * | .e_value_size = 14 | + * | .e_name = "foo" | + * | "value_of_xattr" |<- value_offs = e_name + e_name_len + * +--------------------+ + * | f2fs_xattr_entry | + * | .e_name_index = 4 | + * | .e_name = "bar" | + * +--------------------+ + * | | + * | Free | + * | | + * +--------------------+<- MIN_OFFSET + * | node_footer | + * | (nid, ino, offset) | + * +--------------------+ + * + **/ + +#ifdef CONFIG_F2FS_FS_XATTR +extern const struct xattr_handler f2fs_xattr_user_handler; +extern const struct xattr_handler f2fs_xattr_trusted_handler; +extern const struct xattr_handler f2fs_xattr_acl_access_handler; +extern const struct xattr_handler f2fs_xattr_acl_default_handler; +extern const struct xattr_handler f2fs_xattr_advise_handler; + +extern const struct xattr_handler *f2fs_xattr_handlers[]; + +extern int f2fs_setxattr(struct inode *inode, int name_index, const char *name, + const void *value, size_t value_len); +extern int f2fs_getxattr(struct inode *inode, int name_index, const char *name, + void *buffer, size_t buffer_size); +extern ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, + size_t buffer_size); + +#else + +#define f2fs_xattr_handlers NULL +static inline int f2fs_setxattr(struct inode *inode, int name_index, + const char *name, const void *value, size_t value_len) +{ + return -EOPNOTSUPP; +} +static inline int f2fs_getxattr(struct inode *inode, int name_index, + const char *name, void *buffer, size_t buffer_size) +{ + return -EOPNOTSUPP; +} +static inline ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, + size_t buffer_size) +{ + return -EOPNOTSUPP; +} +#endif + +#endif /* __F2FS_XATTR_H__ */ diff --git a/fs/fat/dir.c b/fs/fat/dir.c index 2a182342442..58bf744dbf3 100644 --- a/fs/fat/dir.c +++ b/fs/fat/dir.c @@ -461,8 +461,7 @@ static int fat_parse_short(struct super_block *sb, } /* - * Return values: negative -> error, 0 -> not found, positive -> found, - * value is the total amount of slots, including the shortname entry. + * Return values: negative -> error/not found, 0 -> found. */ int fat_search_long(struct inode *inode, const unsigned char *name, int name_len, struct fat_slot_info *sinfo) @@ -1255,7 +1254,7 @@ int fat_add_entries(struct inode *dir, void *slots, int nr_slots, sinfo->nr_slots = nr_slots; - /* First stage: search free direcotry entries */ + /* First stage: search free directory entries */ free_slots = nr_bhs = 0; bh = prev = NULL; pos = 0; diff --git a/fs/fat/fat.h b/fs/fat/fat.h index 623f36f0423..12701a56775 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -29,6 +29,7 @@ struct fat_mount_options { unsigned short fs_fmask; unsigned short fs_dmask; unsigned short codepage; /* Codepage for shortname conversions */ + int time_offset; /* Offset of timestamps from UTC (in minutes) */ char *iocharset; /* Charset used for filename input/display */ unsigned short shortname; /* flags for shortname display/create rule */ unsigned char name_check; /* r = relaxed, n = normal, s = strict */ @@ -45,7 +46,7 @@ struct fat_mount_options { flush:1, /* write things quickly */ nocase:1, /* Does this need case conversion? 0=need case conversion*/ usefree:1, /* Use free_clusters for FAT32 */ - tz_utc:1, /* Filesystem timestamps are in UTC */ + tz_set:1, /* Filesystem timestamps' offset set */ rodir:1, /* allow ATTR_RO for directory */ discard:1, /* Issue discard requests on deletions */ nfs:1; /* Do extra work needed for NFS export */ diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 5bafaad0053..f8f491677a4 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -26,6 +26,7 @@ #include <linux/writeback.h> #include <linux/log2.h> #include <linux/hash.h> +#include <linux/blkdev.h> #include <asm/unaligned.h> #include "fat.h" @@ -725,7 +726,8 @@ static int fat_show_options(struct seq_file *m, struct dentry *root) if (opts->allow_utime) seq_printf(m, ",allow_utime=%04o", opts->allow_utime); if (sbi->nls_disk) - seq_printf(m, ",codepage=%s", sbi->nls_disk->charset); + /* strip "cp" prefix from displayed option */ + seq_printf(m, ",codepage=%s", &sbi->nls_disk->charset[2]); if (isvfat) { if (sbi->nls_io) seq_printf(m, ",iocharset=%s", sbi->nls_io->charset); @@ -777,8 +779,12 @@ static int fat_show_options(struct seq_file *m, struct dentry *root) } if (opts->flush) seq_puts(m, ",flush"); - if (opts->tz_utc) - seq_puts(m, ",tz=UTC"); + if (opts->tz_set) { + if (opts->time_offset) + seq_printf(m, ",time_offset=%d", opts->time_offset); + else + seq_puts(m, ",tz=UTC"); + } if (opts->errors == FAT_ERRORS_CONT) seq_puts(m, ",errors=continue"); else if (opts->errors == FAT_ERRORS_PANIC) @@ -800,7 +806,8 @@ enum { Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes, Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes, Opt_obsolete, Opt_flush, Opt_tz_utc, Opt_rodir, Opt_err_cont, - Opt_err_panic, Opt_err_ro, Opt_discard, Opt_nfs, Opt_err, + Opt_err_panic, Opt_err_ro, Opt_discard, Opt_nfs, Opt_time_offset, + Opt_err, }; static const match_table_t fat_tokens = { @@ -825,6 +832,7 @@ static const match_table_t fat_tokens = { {Opt_immutable, "sys_immutable"}, {Opt_flush, "flush"}, {Opt_tz_utc, "tz=UTC"}, + {Opt_time_offset, "time_offset=%d"}, {Opt_err_cont, "errors=continue"}, {Opt_err_panic, "errors=panic"}, {Opt_err_ro, "errors=remount-ro"}, @@ -909,7 +917,7 @@ static int parse_options(struct super_block *sb, char *options, int is_vfat, opts->utf8 = opts->unicode_xlate = 0; opts->numtail = 1; opts->usefree = opts->nocase = 0; - opts->tz_utc = 0; + opts->tz_set = 0; opts->nfs = 0; opts->errors = FAT_ERRORS_RO; *debug = 0; @@ -965,48 +973,57 @@ static int parse_options(struct super_block *sb, char *options, int is_vfat, break; case Opt_uid: if (match_int(&args[0], &option)) - return 0; + return -EINVAL; opts->fs_uid = make_kuid(current_user_ns(), option); if (!uid_valid(opts->fs_uid)) - return 0; + return -EINVAL; break; case Opt_gid: if (match_int(&args[0], &option)) - return 0; + return -EINVAL; opts->fs_gid = make_kgid(current_user_ns(), option); if (!gid_valid(opts->fs_gid)) - return 0; + return -EINVAL; break; case Opt_umask: if (match_octal(&args[0], &option)) - return 0; + return -EINVAL; opts->fs_fmask = opts->fs_dmask = option; break; case Opt_dmask: if (match_octal(&args[0], &option)) - return 0; + return -EINVAL; opts->fs_dmask = option; break; case Opt_fmask: if (match_octal(&args[0], &option)) - return 0; + return -EINVAL; opts->fs_fmask = option; break; case Opt_allow_utime: if (match_octal(&args[0], &option)) - return 0; + return -EINVAL; opts->allow_utime = option & (S_IWGRP | S_IWOTH); break; case Opt_codepage: if (match_int(&args[0], &option)) - return 0; + return -EINVAL; opts->codepage = option; break; case Opt_flush: opts->flush = 1; break; + case Opt_time_offset: + if (match_int(&args[0], &option)) + return -EINVAL; + if (option < -12 * 60 || option > 12 * 60) + return -EINVAL; + opts->tz_set = 1; + opts->time_offset = option; + break; case Opt_tz_utc: - opts->tz_utc = 1; + opts->tz_set = 1; + opts->time_offset = 0; break; case Opt_err_cont: opts->errors = FAT_ERRORS_CONT; @@ -1327,7 +1344,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat, sbi->dir_entries = get_unaligned_le16(&b->dir_entries); if (sbi->dir_entries & (sbi->dir_per_block - 1)) { if (!silent) - fat_msg(sb, KERN_ERR, "bogus directroy-entries per block" + fat_msg(sb, KERN_ERR, "bogus directory-entries per block" " (%u)", sbi->dir_entries); brelse(bh); goto out_invalid; @@ -1431,6 +1448,14 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat, goto out_fail; } + if (sbi->options.discard) { + struct request_queue *q = bdev_get_queue(sb->s_bdev); + if (!blk_queue_discard(q)) + fat_msg(sb, KERN_WARNING, + "mounting with \"discard\" option, but " + "the device does not support discard"); + } + return 0; out_invalid: diff --git a/fs/fat/misc.c b/fs/fat/misc.c index 6d93360ca0c..359d307b550 100644 --- a/fs/fat/misc.c +++ b/fs/fat/misc.c @@ -135,6 +135,10 @@ int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster) } if (ret < 0) return ret; + /* + * FIXME:Although we can add this cache, fat_cache_add() is + * assuming to be called after linear search with fat_cache_id. + */ // fat_cache_add(inode, new_fclus, new_dclus); } else { MSDOS_I(inode)->i_start = new_dclus; @@ -212,8 +216,10 @@ void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts, + days_in_year[month] + day + DAYS_DELTA) * SECS_PER_DAY; - if (!sbi->options.tz_utc) + if (!sbi->options.tz_set) second += sys_tz.tz_minuteswest * SECS_PER_MIN; + else + second -= sbi->options.time_offset * SECS_PER_MIN; if (time_cs) { ts->tv_sec = second + (time_cs / 100); @@ -229,8 +235,9 @@ void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec *ts, __le16 *time, __le16 *date, u8 *time_cs) { struct tm tm; - time_to_tm(ts->tv_sec, sbi->options.tz_utc ? 0 : - -sys_tz.tz_minuteswest * 60, &tm); + time_to_tm(ts->tv_sec, + (sbi->options.tz_set ? sbi->options.time_offset : + -sys_tz.tz_minuteswest) * SECS_PER_MIN, &tm); /* FAT can only support year between 1980 to 2107 */ if (tm.tm_year < 1980 - 1900) { diff --git a/fs/fhandle.c b/fs/fhandle.c index cccdc874bb5..999ff5c3cab 100644 --- a/fs/fhandle.c +++ b/fs/fhandle.c @@ -52,7 +52,7 @@ static long do_sys_name_to_handle(struct path *path, handle_bytes = handle_dwords * sizeof(u32); handle->handle_bytes = handle_bytes; if ((handle->handle_bytes > f_handle.handle_bytes) || - (retval == 255) || (retval == -ENOSPC)) { + (retval == FILEID_INVALID) || (retval == -ENOSPC)) { /* As per old exportfs_encode_fh documentation * we could return ENOSPC to indicate overflow * But file system returned 255 always. So handle diff --git a/fs/file.c b/fs/file.c index d3b5fa80b71..2b3570b7cae 100644 --- a/fs/file.c +++ b/fs/file.c @@ -490,7 +490,7 @@ void exit_files(struct task_struct *tsk) } } -static void __devinit fdtable_defer_list_init(int cpu) +static void fdtable_defer_list_init(int cpu) { struct fdtable_defer *fddef = &per_cpu(fdtable_defer_list, cpu); spin_lock_init(&fddef->lock); @@ -519,12 +519,6 @@ struct files_struct init_files = { .file_lock = __SPIN_LOCK_UNLOCKED(init_task.file_lock), }; -void daemonize_descriptors(void) -{ - atomic_inc(&init_files.count); - reset_files_struct(&init_files); -} - /* * allocate a file descriptor, mark it busy. */ @@ -685,7 +679,6 @@ void do_close_on_exec(struct files_struct *files) struct fdtable *fdt; /* exec unshares first */ - BUG_ON(atomic_read(&files->count) != 1); spin_lock(&files->file_lock); for (i = 0; ; i++) { unsigned long set; @@ -900,7 +893,7 @@ int replace_fd(unsigned fd, struct file *file, unsigned flags) return __close_fd(files, fd); if (fd >= rlimit(RLIMIT_NOFILE)) - return -EMFILE; + return -EBADF; spin_lock(&files->file_lock); err = expand_files(files, fd); @@ -926,7 +919,7 @@ SYSCALL_DEFINE3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags) return -EINVAL; if (newfd >= rlimit(RLIMIT_NOFILE)) - return -EMFILE; + return -EBADF; spin_lock(&files->file_lock); err = expand_files(files, newfd); @@ -995,16 +988,18 @@ int iterate_fd(struct files_struct *files, unsigned n, const void *p) { struct fdtable *fdt; - struct file *file; int res = 0; if (!files) return 0; spin_lock(&files->file_lock); - fdt = files_fdtable(files); - while (!res && n < fdt->max_fds) { - file = rcu_dereference_check_fdtable(files, fdt->fd[n++]); - if (file) - res = f(p, file, n); + for (fdt = files_fdtable(files); n < fdt->max_fds; n++) { + struct file *file; + file = rcu_dereference_check_fdtable(files, fdt->fd[n]); + if (!file) + continue; + res = f(p, file, n); + if (res) + break; } spin_unlock(&files->file_lock); return res; diff --git a/fs/file_table.c b/fs/file_table.c index a72bf9ddd0d..de9e9653d61 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -458,8 +458,8 @@ void mark_files_ro(struct super_block *sb) spin_unlock(&f->f_lock); if (file_check_writeable(f) != 0) continue; + __mnt_drop_write(f->f_path.mnt); file_release_write(f); - mnt_drop_write_file(f); } while_file_list_for_each_entry; lg_global_unlock(&files_lglock); } diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 51ea267d444..310972b72a6 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -228,6 +228,8 @@ static void requeue_io(struct inode *inode, struct bdi_writeback *wb) static void inode_sync_complete(struct inode *inode) { inode->i_state &= ~I_SYNC; + /* If inode is clean an unused, put it into LRU now... */ + inode_add_lru(inode); /* Waiters must see I_SYNC cleared before being woken up */ smp_mb(); wake_up_bit(&inode->i_state, __I_SYNC); @@ -1032,7 +1034,7 @@ int bdi_writeback_thread(void *data) while (!kthread_freezable_should_stop(NULL)) { /* * Remove own delayed wake-up timer, since we are already awake - * and we'll take care of the preriodic write-back. + * and we'll take care of the periodic write-back. */ del_timer(&wb->wakeup_timer); diff --git a/fs/fs_struct.c b/fs/fs_struct.c index 5df4775fea0..fe6ca583bbc 100644 --- a/fs/fs_struct.c +++ b/fs/fs_struct.c @@ -164,27 +164,3 @@ struct fs_struct init_fs = { .seq = SEQCNT_ZERO, .umask = 0022, }; - -void daemonize_fs_struct(void) -{ - struct fs_struct *fs = current->fs; - - if (fs) { - int kill; - - task_lock(current); - - spin_lock(&init_fs.lock); - init_fs.users++; - spin_unlock(&init_fs.lock); - - spin_lock(&fs->lock); - current->fs = &init_fs; - kill = !--fs->users; - spin_unlock(&fs->lock); - - task_unlock(current); - if (kill) - free_fs_struct(fs); - } -} diff --git a/fs/fscache/cache.c b/fs/fscache/cache.c index 6a3c48abd67..b52aed1dca9 100644 --- a/fs/fscache/cache.c +++ b/fs/fscache/cache.c @@ -314,10 +314,10 @@ EXPORT_SYMBOL(fscache_add_cache); */ void fscache_io_error(struct fscache_cache *cache) { - set_bit(FSCACHE_IOERROR, &cache->flags); - - printk(KERN_ERR "FS-Cache: Cache %s stopped due to I/O error\n", - cache->ops->name); + if (!test_and_set_bit(FSCACHE_IOERROR, &cache->flags)) + printk(KERN_ERR "FS-Cache:" + " Cache '%s' stopped due to I/O error\n", + cache->ops->name); } EXPORT_SYMBOL(fscache_io_error); diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c index 990535071a8..8dcb114758e 100644 --- a/fs/fscache/cookie.c +++ b/fs/fscache/cookie.c @@ -370,6 +370,66 @@ cant_attach_object: } /* + * Invalidate an object. Callable with spinlocks held. + */ +void __fscache_invalidate(struct fscache_cookie *cookie) +{ + struct fscache_object *object; + + _enter("{%s}", cookie->def->name); + + fscache_stat(&fscache_n_invalidates); + + /* Only permit invalidation of data files. Invalidating an index will + * require the caller to release all its attachments to the tree rooted + * there, and if it's doing that, it may as well just retire the + * cookie. + */ + ASSERTCMP(cookie->def->type, ==, FSCACHE_COOKIE_TYPE_DATAFILE); + + /* We will be updating the cookie too. */ + BUG_ON(!cookie->def->get_aux); + + /* If there's an object, we tell the object state machine to handle the + * invalidation on our behalf, otherwise there's nothing to do. + */ + if (!hlist_empty(&cookie->backing_objects)) { + spin_lock(&cookie->lock); + + if (!hlist_empty(&cookie->backing_objects) && + !test_and_set_bit(FSCACHE_COOKIE_INVALIDATING, + &cookie->flags)) { + object = hlist_entry(cookie->backing_objects.first, + struct fscache_object, + cookie_link); + if (object->state < FSCACHE_OBJECT_DYING) + fscache_raise_event( + object, FSCACHE_OBJECT_EV_INVALIDATE); + } + + spin_unlock(&cookie->lock); + } + + _leave(""); +} +EXPORT_SYMBOL(__fscache_invalidate); + +/* + * Wait for object invalidation to complete. + */ +void __fscache_wait_on_invalidate(struct fscache_cookie *cookie) +{ + _enter("%p", cookie); + + wait_on_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING, + fscache_wait_bit_interruptible, + TASK_UNINTERRUPTIBLE); + + _leave(""); +} +EXPORT_SYMBOL(__fscache_wait_on_invalidate); + +/* * update the index entries backing a cookie */ void __fscache_update_cookie(struct fscache_cookie *cookie) @@ -442,16 +502,34 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, int retire) event = retire ? FSCACHE_OBJECT_EV_RETIRE : FSCACHE_OBJECT_EV_RELEASE; +try_again: spin_lock(&cookie->lock); /* break links with all the active objects */ while (!hlist_empty(&cookie->backing_objects)) { + int n_reads; object = hlist_entry(cookie->backing_objects.first, struct fscache_object, cookie_link); _debug("RELEASE OBJ%x", object->debug_id); + set_bit(FSCACHE_COOKIE_WAITING_ON_READS, &cookie->flags); + n_reads = atomic_read(&object->n_reads); + if (n_reads) { + int n_ops = object->n_ops; + int n_in_progress = object->n_in_progress; + spin_unlock(&cookie->lock); + printk(KERN_ERR "FS-Cache:" + " Cookie '%s' still has %d outstanding reads (%d,%d)\n", + cookie->def->name, + n_reads, n_ops, n_in_progress); + wait_on_bit(&cookie->flags, FSCACHE_COOKIE_WAITING_ON_READS, + fscache_wait_bit, TASK_UNINTERRUPTIBLE); + printk("Wait finished\n"); + goto try_again; + } + /* detach each cache object from the object cookie */ spin_lock(&object->lock); hlist_del_init(&object->cookie_link); diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h index f6aad48d38a..ee38fef4be5 100644 --- a/fs/fscache/internal.h +++ b/fs/fscache/internal.h @@ -121,12 +121,19 @@ extern int fscache_submit_exclusive_op(struct fscache_object *, struct fscache_operation *); extern int fscache_submit_op(struct fscache_object *, struct fscache_operation *); -extern int fscache_cancel_op(struct fscache_operation *); +extern int fscache_cancel_op(struct fscache_operation *, + void (*)(struct fscache_operation *)); +extern void fscache_cancel_all_ops(struct fscache_object *); extern void fscache_abort_object(struct fscache_object *); extern void fscache_start_operations(struct fscache_object *); extern void fscache_operation_gc(struct work_struct *); /* + * page.c + */ +extern void fscache_invalidate_writes(struct fscache_cookie *); + +/* * proc.c */ #ifdef CONFIG_PROC_FS @@ -194,6 +201,7 @@ extern atomic_t fscache_n_store_vmscan_not_storing; extern atomic_t fscache_n_store_vmscan_gone; extern atomic_t fscache_n_store_vmscan_busy; extern atomic_t fscache_n_store_vmscan_cancelled; +extern atomic_t fscache_n_store_vmscan_wait; extern atomic_t fscache_n_marks; extern atomic_t fscache_n_uncaches; @@ -205,6 +213,9 @@ extern atomic_t fscache_n_acquires_ok; extern atomic_t fscache_n_acquires_nobufs; extern atomic_t fscache_n_acquires_oom; +extern atomic_t fscache_n_invalidates; +extern atomic_t fscache_n_invalidates_run; + extern atomic_t fscache_n_updates; extern atomic_t fscache_n_updates_null; extern atomic_t fscache_n_updates_run; @@ -237,6 +248,7 @@ extern atomic_t fscache_n_cop_alloc_object; extern atomic_t fscache_n_cop_lookup_object; extern atomic_t fscache_n_cop_lookup_complete; extern atomic_t fscache_n_cop_grab_object; +extern atomic_t fscache_n_cop_invalidate_object; extern atomic_t fscache_n_cop_update_object; extern atomic_t fscache_n_cop_drop_object; extern atomic_t fscache_n_cop_put_object; @@ -278,6 +290,7 @@ extern const struct file_operations fscache_stats_fops; static inline void fscache_raise_event(struct fscache_object *object, unsigned event) { + BUG_ON(event >= NR_FSCACHE_OBJECT_EVENTS); if (!test_and_set_bit(event, &object->events) && test_bit(event, &object->event_mask)) fscache_enqueue_object(object); diff --git a/fs/fscache/object-list.c b/fs/fscache/object-list.c index ebe29c58138..f27c89d1788 100644 --- a/fs/fscache/object-list.c +++ b/fs/fscache/object-list.c @@ -245,7 +245,7 @@ static int fscache_objlist_show(struct seq_file *m, void *v) obj->n_in_progress, obj->n_exclusive, atomic_read(&obj->n_reads), - obj->event_mask & FSCACHE_OBJECT_EVENTS_MASK, + obj->event_mask, obj->events, obj->flags, work_busy(&obj->work)); diff --git a/fs/fscache/object.c b/fs/fscache/object.c index b6b897c550a..50d41c18021 100644 --- a/fs/fscache/object.c +++ b/fs/fscache/object.c @@ -14,6 +14,7 @@ #define FSCACHE_DEBUG_LEVEL COOKIE #include <linux/module.h> +#include <linux/slab.h> #include "internal.h" const char *fscache_object_states[FSCACHE_OBJECT__NSTATES] = { @@ -22,6 +23,7 @@ const char *fscache_object_states[FSCACHE_OBJECT__NSTATES] = { [FSCACHE_OBJECT_CREATING] = "OBJECT_CREATING", [FSCACHE_OBJECT_AVAILABLE] = "OBJECT_AVAILABLE", [FSCACHE_OBJECT_ACTIVE] = "OBJECT_ACTIVE", + [FSCACHE_OBJECT_INVALIDATING] = "OBJECT_INVALIDATING", [FSCACHE_OBJECT_UPDATING] = "OBJECT_UPDATING", [FSCACHE_OBJECT_DYING] = "OBJECT_DYING", [FSCACHE_OBJECT_LC_DYING] = "OBJECT_LC_DYING", @@ -39,6 +41,7 @@ const char fscache_object_states_short[FSCACHE_OBJECT__NSTATES][5] = { [FSCACHE_OBJECT_CREATING] = "CRTN", [FSCACHE_OBJECT_AVAILABLE] = "AVBL", [FSCACHE_OBJECT_ACTIVE] = "ACTV", + [FSCACHE_OBJECT_INVALIDATING] = "INVL", [FSCACHE_OBJECT_UPDATING] = "UPDT", [FSCACHE_OBJECT_DYING] = "DYNG", [FSCACHE_OBJECT_LC_DYING] = "LCDY", @@ -54,6 +57,7 @@ static void fscache_put_object(struct fscache_object *); static void fscache_initialise_object(struct fscache_object *); static void fscache_lookup_object(struct fscache_object *); static void fscache_object_available(struct fscache_object *); +static void fscache_invalidate_object(struct fscache_object *); static void fscache_release_object(struct fscache_object *); static void fscache_withdraw_object(struct fscache_object *); static void fscache_enqueue_dependents(struct fscache_object *); @@ -79,6 +83,15 @@ static inline void fscache_done_parent_op(struct fscache_object *object) } /* + * Notify netfs of invalidation completion. + */ +static inline void fscache_invalidation_complete(struct fscache_cookie *cookie) +{ + if (test_and_clear_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) + wake_up_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING); +} + +/* * process events that have been sent to an object's state machine * - initiates parent lookup * - does object lookup @@ -90,6 +103,7 @@ static void fscache_object_state_machine(struct fscache_object *object) { enum fscache_object_state new_state; struct fscache_cookie *cookie; + int event; ASSERT(object != NULL); @@ -101,7 +115,8 @@ static void fscache_object_state_machine(struct fscache_object *object) /* wait for the parent object to become ready */ case FSCACHE_OBJECT_INIT: object->event_mask = - ULONG_MAX & ~(1 << FSCACHE_OBJECT_EV_CLEARED); + FSCACHE_OBJECT_EVENTS_MASK & + ~(1 << FSCACHE_OBJECT_EV_CLEARED); fscache_initialise_object(object); goto done; @@ -125,6 +140,16 @@ static void fscache_object_state_machine(struct fscache_object *object) case FSCACHE_OBJECT_ACTIVE: goto active_transit; + /* Invalidate an object on disk */ + case FSCACHE_OBJECT_INVALIDATING: + clear_bit(FSCACHE_OBJECT_EV_INVALIDATE, &object->events); + fscache_stat(&fscache_n_invalidates_run); + fscache_stat(&fscache_n_cop_invalidate_object); + fscache_invalidate_object(object); + fscache_stat_d(&fscache_n_cop_invalidate_object); + fscache_raise_event(object, FSCACHE_OBJECT_EV_UPDATE); + goto active_transit; + /* update the object metadata on disk */ case FSCACHE_OBJECT_UPDATING: clear_bit(FSCACHE_OBJECT_EV_UPDATE, &object->events); @@ -251,13 +276,17 @@ static void fscache_object_state_machine(struct fscache_object *object) /* determine the transition from a lookup state */ lookup_transit: - switch (fls(object->events & object->event_mask) - 1) { + event = fls(object->events & object->event_mask) - 1; + switch (event) { case FSCACHE_OBJECT_EV_WITHDRAW: case FSCACHE_OBJECT_EV_RETIRE: case FSCACHE_OBJECT_EV_RELEASE: case FSCACHE_OBJECT_EV_ERROR: new_state = FSCACHE_OBJECT_LC_DYING; goto change_state; + case FSCACHE_OBJECT_EV_INVALIDATE: + new_state = FSCACHE_OBJECT_INVALIDATING; + goto change_state; case FSCACHE_OBJECT_EV_REQUEUE: goto done; case -1: @@ -268,13 +297,17 @@ lookup_transit: /* determine the transition from an active state */ active_transit: - switch (fls(object->events & object->event_mask) - 1) { + event = fls(object->events & object->event_mask) - 1; + switch (event) { case FSCACHE_OBJECT_EV_WITHDRAW: case FSCACHE_OBJECT_EV_RETIRE: case FSCACHE_OBJECT_EV_RELEASE: case FSCACHE_OBJECT_EV_ERROR: new_state = FSCACHE_OBJECT_DYING; goto change_state; + case FSCACHE_OBJECT_EV_INVALIDATE: + new_state = FSCACHE_OBJECT_INVALIDATING; + goto change_state; case FSCACHE_OBJECT_EV_UPDATE: new_state = FSCACHE_OBJECT_UPDATING; goto change_state; @@ -287,7 +320,8 @@ active_transit: /* determine the transition from a terminal state */ terminal_transit: - switch (fls(object->events & object->event_mask) - 1) { + event = fls(object->events & object->event_mask) - 1; + switch (event) { case FSCACHE_OBJECT_EV_WITHDRAW: new_state = FSCACHE_OBJECT_WITHDRAWING; goto change_state; @@ -320,8 +354,8 @@ done: unsupported_event: printk(KERN_ERR "FS-Cache:" - " Unsupported event %lx [mask %lx] in state %s\n", - object->events, object->event_mask, + " Unsupported event %d [%lx/%lx] in state %s\n", + event, object->events, object->event_mask, fscache_object_states[object->state]); BUG(); } @@ -587,8 +621,6 @@ static void fscache_object_available(struct fscache_object *object) if (object->n_in_progress == 0) { if (object->n_ops > 0) { ASSERTCMP(object->n_ops, >=, object->n_obj_ops); - ASSERTIF(object->n_ops > object->n_obj_ops, - !list_empty(&object->pending_ops)); fscache_start_operations(object); } else { ASSERT(list_empty(&object->pending_ops)); @@ -681,6 +713,7 @@ static void fscache_withdraw_object(struct fscache_object *object) if (object->cookie == cookie) { hlist_del_init(&object->cookie_link); object->cookie = NULL; + fscache_invalidation_complete(cookie); detached = true; } spin_unlock(&cookie->lock); @@ -890,3 +923,55 @@ enum fscache_checkaux fscache_check_aux(struct fscache_object *object, return result; } EXPORT_SYMBOL(fscache_check_aux); + +/* + * Asynchronously invalidate an object. + */ +static void fscache_invalidate_object(struct fscache_object *object) +{ + struct fscache_operation *op; + struct fscache_cookie *cookie = object->cookie; + + _enter("{OBJ%x}", object->debug_id); + + /* Reject any new read/write ops and abort any that are pending. */ + fscache_invalidate_writes(cookie); + clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags); + fscache_cancel_all_ops(object); + + /* Now we have to wait for in-progress reads and writes */ + op = kzalloc(sizeof(*op), GFP_KERNEL); + if (!op) { + fscache_raise_event(object, FSCACHE_OBJECT_EV_ERROR); + _leave(" [ENOMEM]"); + return; + } + + fscache_operation_init(op, object->cache->ops->invalidate_object, NULL); + op->flags = FSCACHE_OP_ASYNC | (1 << FSCACHE_OP_EXCLUSIVE); + + spin_lock(&cookie->lock); + if (fscache_submit_exclusive_op(object, op) < 0) + goto submit_op_failed; + spin_unlock(&cookie->lock); + fscache_put_operation(op); + + /* Once we've completed the invalidation, we know there will be no data + * stored in the cache and thus we can reinstate the data-check-skip + * optimisation. + */ + set_bit(FSCACHE_COOKIE_NO_DATA_YET, &cookie->flags); + + /* We can allow read and write requests to come in once again. They'll + * queue up behind our exclusive invalidation operation. + */ + fscache_invalidation_complete(cookie); + _leave(""); + return; + +submit_op_failed: + spin_unlock(&cookie->lock); + kfree(op); + fscache_raise_event(object, FSCACHE_OBJECT_EV_ERROR); + _leave(" [EIO]"); +} diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c index 30afdfa7aec..762a9ec4ffa 100644 --- a/fs/fscache/operation.c +++ b/fs/fscache/operation.c @@ -37,6 +37,7 @@ void fscache_enqueue_operation(struct fscache_operation *op) ASSERT(op->processor != NULL); ASSERTCMP(op->object->state, >=, FSCACHE_OBJECT_AVAILABLE); ASSERTCMP(atomic_read(&op->usage), >, 0); + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_IN_PROGRESS); fscache_stat(&fscache_n_op_enqueue); switch (op->flags & FSCACHE_OP_TYPE) { @@ -64,6 +65,9 @@ EXPORT_SYMBOL(fscache_enqueue_operation); static void fscache_run_op(struct fscache_object *object, struct fscache_operation *op) { + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING); + + op->state = FSCACHE_OP_ST_IN_PROGRESS; object->n_in_progress++; if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags)) wake_up_bit(&op->flags, FSCACHE_OP_WAITING); @@ -84,18 +88,21 @@ int fscache_submit_exclusive_op(struct fscache_object *object, _enter("{OBJ%x OP%x},", object->debug_id, op->debug_id); + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED); + ASSERTCMP(atomic_read(&op->usage), >, 0); + spin_lock(&object->lock); ASSERTCMP(object->n_ops, >=, object->n_in_progress); ASSERTCMP(object->n_ops, >=, object->n_exclusive); ASSERT(list_empty(&op->pend_link)); - ret = -ENOBUFS; + op->state = FSCACHE_OP_ST_PENDING; if (fscache_object_is_active(object)) { op->object = object; object->n_ops++; object->n_exclusive++; /* reads and writes must wait */ - if (object->n_ops > 1) { + if (object->n_in_progress > 0) { atomic_inc(&op->usage); list_add_tail(&op->pend_link, &object->pending_ops); fscache_stat(&fscache_n_op_pend); @@ -121,8 +128,11 @@ int fscache_submit_exclusive_op(struct fscache_object *object, fscache_stat(&fscache_n_op_pend); ret = 0; } else { - /* not allowed to submit ops in any other state */ - BUG(); + /* If we're in any other state, there must have been an I/O + * error of some nature. + */ + ASSERT(test_bit(FSCACHE_IOERROR, &object->cache->flags)); + ret = -EIO; } spin_unlock(&object->lock); @@ -186,6 +196,7 @@ int fscache_submit_op(struct fscache_object *object, _enter("{OBJ%x OP%x},{%u}", object->debug_id, op->debug_id, atomic_read(&op->usage)); + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_INITIALISED); ASSERTCMP(atomic_read(&op->usage), >, 0); spin_lock(&object->lock); @@ -196,6 +207,7 @@ int fscache_submit_op(struct fscache_object *object, ostate = object->state; smp_rmb(); + op->state = FSCACHE_OP_ST_PENDING; if (fscache_object_is_active(object)) { op->object = object; object->n_ops++; @@ -225,12 +237,15 @@ int fscache_submit_op(struct fscache_object *object, object->state == FSCACHE_OBJECT_LC_DYING || object->state == FSCACHE_OBJECT_WITHDRAWING) { fscache_stat(&fscache_n_op_rejected); + op->state = FSCACHE_OP_ST_CANCELLED; ret = -ENOBUFS; } else if (!test_bit(FSCACHE_IOERROR, &object->cache->flags)) { fscache_report_unexpected_submission(object, op, ostate); ASSERT(!fscache_object_is_active(object)); + op->state = FSCACHE_OP_ST_CANCELLED; ret = -ENOBUFS; } else { + op->state = FSCACHE_OP_ST_CANCELLED; ret = -ENOBUFS; } @@ -283,20 +298,28 @@ void fscache_start_operations(struct fscache_object *object) /* * cancel an operation that's pending on an object */ -int fscache_cancel_op(struct fscache_operation *op) +int fscache_cancel_op(struct fscache_operation *op, + void (*do_cancel)(struct fscache_operation *)) { struct fscache_object *object = op->object; int ret; _enter("OBJ%x OP%x}", op->object->debug_id, op->debug_id); + ASSERTCMP(op->state, >=, FSCACHE_OP_ST_PENDING); + ASSERTCMP(op->state, !=, FSCACHE_OP_ST_CANCELLED); + ASSERTCMP(atomic_read(&op->usage), >, 0); + spin_lock(&object->lock); ret = -EBUSY; - if (!list_empty(&op->pend_link)) { + if (op->state == FSCACHE_OP_ST_PENDING) { + ASSERT(!list_empty(&op->pend_link)); fscache_stat(&fscache_n_op_cancelled); list_del_init(&op->pend_link); - object->n_ops--; + if (do_cancel) + do_cancel(op); + op->state = FSCACHE_OP_ST_CANCELLED; if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) object->n_exclusive--; if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags)) @@ -311,6 +334,70 @@ int fscache_cancel_op(struct fscache_operation *op) } /* + * Cancel all pending operations on an object + */ +void fscache_cancel_all_ops(struct fscache_object *object) +{ + struct fscache_operation *op; + + _enter("OBJ%x", object->debug_id); + + spin_lock(&object->lock); + + while (!list_empty(&object->pending_ops)) { + op = list_entry(object->pending_ops.next, + struct fscache_operation, pend_link); + fscache_stat(&fscache_n_op_cancelled); + list_del_init(&op->pend_link); + + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_PENDING); + op->state = FSCACHE_OP_ST_CANCELLED; + + if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) + object->n_exclusive--; + if (test_and_clear_bit(FSCACHE_OP_WAITING, &op->flags)) + wake_up_bit(&op->flags, FSCACHE_OP_WAITING); + fscache_put_operation(op); + cond_resched_lock(&object->lock); + } + + spin_unlock(&object->lock); + _leave(""); +} + +/* + * Record the completion or cancellation of an in-progress operation. + */ +void fscache_op_complete(struct fscache_operation *op, bool cancelled) +{ + struct fscache_object *object = op->object; + + _enter("OBJ%x", object->debug_id); + + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_IN_PROGRESS); + ASSERTCMP(object->n_in_progress, >, 0); + ASSERTIFCMP(test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags), + object->n_exclusive, >, 0); + ASSERTIFCMP(test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags), + object->n_in_progress, ==, 1); + + spin_lock(&object->lock); + + op->state = cancelled ? + FSCACHE_OP_ST_CANCELLED : FSCACHE_OP_ST_COMPLETE; + + if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) + object->n_exclusive--; + object->n_in_progress--; + if (object->n_in_progress == 0) + fscache_start_operations(object); + + spin_unlock(&object->lock); + _leave(""); +} +EXPORT_SYMBOL(fscache_op_complete); + +/* * release an operation * - queues pending ops if this is the last in-progress op */ @@ -328,8 +415,9 @@ void fscache_put_operation(struct fscache_operation *op) return; _debug("PUT OP"); - if (test_and_set_bit(FSCACHE_OP_DEAD, &op->flags)) - BUG(); + ASSERTIFCMP(op->state != FSCACHE_OP_ST_COMPLETE, + op->state, ==, FSCACHE_OP_ST_CANCELLED); + op->state = FSCACHE_OP_ST_DEAD; fscache_stat(&fscache_n_op_release); @@ -340,8 +428,14 @@ void fscache_put_operation(struct fscache_operation *op) object = op->object; - if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags)) - atomic_dec(&object->n_reads); + if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags)) { + if (atomic_dec_and_test(&object->n_reads)) { + clear_bit(FSCACHE_COOKIE_WAITING_ON_READS, + &object->cookie->flags); + wake_up_bit(&object->cookie->flags, + FSCACHE_COOKIE_WAITING_ON_READS); + } + } /* now... we may get called with the object spinlock held, so we * complete the cleanup here only if we can immediately acquire the @@ -359,16 +453,6 @@ void fscache_put_operation(struct fscache_operation *op) return; } - if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) { - ASSERTCMP(object->n_exclusive, >, 0); - object->n_exclusive--; - } - - ASSERTCMP(object->n_in_progress, >, 0); - object->n_in_progress--; - if (object->n_in_progress == 0) - fscache_start_operations(object); - ASSERTCMP(object->n_ops, >, 0); object->n_ops--; if (object->n_ops == 0) @@ -407,23 +491,14 @@ void fscache_operation_gc(struct work_struct *work) spin_unlock(&cache->op_gc_list_lock); object = op->object; + spin_lock(&object->lock); _debug("GC DEFERRED REL OBJ%x OP%x", object->debug_id, op->debug_id); fscache_stat(&fscache_n_op_gc); ASSERTCMP(atomic_read(&op->usage), ==, 0); - - spin_lock(&object->lock); - if (test_bit(FSCACHE_OP_EXCLUSIVE, &op->flags)) { - ASSERTCMP(object->n_exclusive, >, 0); - object->n_exclusive--; - } - - ASSERTCMP(object->n_in_progress, >, 0); - object->n_in_progress--; - if (object->n_in_progress == 0) - fscache_start_operations(object); + ASSERTCMP(op->state, ==, FSCACHE_OP_ST_DEAD); ASSERTCMP(object->n_ops, >, 0); object->n_ops--; @@ -431,6 +506,7 @@ void fscache_operation_gc(struct work_struct *work) fscache_raise_event(object, FSCACHE_OBJECT_EV_CLEARED); spin_unlock(&object->lock); + kfree(op); } while (count++ < 20); diff --git a/fs/fscache/page.c b/fs/fscache/page.c index 3f7a59bfa7a..ff000e52072 100644 --- a/fs/fscache/page.c +++ b/fs/fscache/page.c @@ -56,6 +56,7 @@ bool __fscache_maybe_release_page(struct fscache_cookie *cookie, _enter("%p,%p,%x", cookie, page, gfp); +try_again: rcu_read_lock(); val = radix_tree_lookup(&cookie->stores, page->index); if (!val) { @@ -104,11 +105,19 @@ bool __fscache_maybe_release_page(struct fscache_cookie *cookie, return true; page_busy: - /* we might want to wait here, but that could deadlock the allocator as - * the work threads writing to the cache may all end up sleeping - * on memory allocation */ - fscache_stat(&fscache_n_store_vmscan_busy); - return false; + /* We will wait here if we're allowed to, but that could deadlock the + * allocator as the work threads writing to the cache may all end up + * sleeping on memory allocation, so we may need to impose a timeout + * too. */ + if (!(gfp & __GFP_WAIT)) { + fscache_stat(&fscache_n_store_vmscan_busy); + return false; + } + + fscache_stat(&fscache_n_store_vmscan_wait); + __fscache_wait_on_page_write(cookie, page); + gfp &= ~__GFP_WAIT; + goto try_again; } EXPORT_SYMBOL(__fscache_maybe_release_page); @@ -162,6 +171,7 @@ static void fscache_attr_changed_op(struct fscache_operation *op) fscache_abort_object(object); } + fscache_op_complete(op, true); _leave(""); } @@ -223,6 +233,8 @@ static void fscache_release_retrieval_op(struct fscache_operation *_op) _enter("{OP%x}", op->op.debug_id); + ASSERTCMP(op->n_pages, ==, 0); + fscache_hist(fscache_retrieval_histogram, op->start_time); if (op->context) fscache_put_context(op->op.object->cookie, op->context); @@ -291,6 +303,17 @@ static int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie) } /* + * Handle cancellation of a pending retrieval op + */ +static void fscache_do_cancel_retrieval(struct fscache_operation *_op) +{ + struct fscache_retrieval *op = + container_of(_op, struct fscache_retrieval, op); + + op->n_pages = 0; +} + +/* * wait for an object to become active (or dead) */ static int fscache_wait_for_retrieval_activation(struct fscache_object *object, @@ -307,8 +330,8 @@ static int fscache_wait_for_retrieval_activation(struct fscache_object *object, fscache_stat(stat_op_waits); if (wait_on_bit(&op->op.flags, FSCACHE_OP_WAITING, fscache_wait_bit_interruptible, - TASK_INTERRUPTIBLE) < 0) { - ret = fscache_cancel_op(&op->op); + TASK_INTERRUPTIBLE) != 0) { + ret = fscache_cancel_op(&op->op, fscache_do_cancel_retrieval); if (ret == 0) return -ERESTARTSYS; @@ -320,7 +343,14 @@ static int fscache_wait_for_retrieval_activation(struct fscache_object *object, _debug("<<< GO"); check_if_dead: + if (op->op.state == FSCACHE_OP_ST_CANCELLED) { + fscache_stat(stat_object_dead); + _leave(" = -ENOBUFS [cancelled]"); + return -ENOBUFS; + } if (unlikely(fscache_object_is_dead(object))) { + pr_err("%s() = -ENOBUFS [obj dead %d]\n", __func__, op->op.state); + fscache_cancel_op(&op->op, fscache_do_cancel_retrieval); fscache_stat(stat_object_dead); return -ENOBUFS; } @@ -353,6 +383,11 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie, if (hlist_empty(&cookie->backing_objects)) goto nobufs; + if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) { + _leave(" = -ENOBUFS [invalidating]"); + return -ENOBUFS; + } + ASSERTCMP(cookie->def->type, !=, FSCACHE_COOKIE_TYPE_INDEX); ASSERTCMP(page, !=, NULL); @@ -364,6 +399,7 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie, _leave(" = -ENOMEM"); return -ENOMEM; } + op->n_pages = 1; spin_lock(&cookie->lock); @@ -375,10 +411,10 @@ int __fscache_read_or_alloc_page(struct fscache_cookie *cookie, ASSERTCMP(object->state, >, FSCACHE_OBJECT_LOOKING_UP); atomic_inc(&object->n_reads); - set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags); + __set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags); if (fscache_submit_op(object, &op->op) < 0) - goto nobufs_unlock; + goto nobufs_unlock_dec; spin_unlock(&cookie->lock); fscache_stat(&fscache_n_retrieval_ops); @@ -425,6 +461,8 @@ error: _leave(" = %d", ret); return ret; +nobufs_unlock_dec: + atomic_dec(&object->n_reads); nobufs_unlock: spin_unlock(&cookie->lock); kfree(op); @@ -472,6 +510,11 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie, if (hlist_empty(&cookie->backing_objects)) goto nobufs; + if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) { + _leave(" = -ENOBUFS [invalidating]"); + return -ENOBUFS; + } + ASSERTCMP(cookie->def->type, !=, FSCACHE_COOKIE_TYPE_INDEX); ASSERTCMP(*nr_pages, >, 0); ASSERT(!list_empty(pages)); @@ -482,6 +525,7 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie, op = fscache_alloc_retrieval(mapping, end_io_func, context); if (!op) return -ENOMEM; + op->n_pages = *nr_pages; spin_lock(&cookie->lock); @@ -491,10 +535,10 @@ int __fscache_read_or_alloc_pages(struct fscache_cookie *cookie, struct fscache_object, cookie_link); atomic_inc(&object->n_reads); - set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags); + __set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags); if (fscache_submit_op(object, &op->op) < 0) - goto nobufs_unlock; + goto nobufs_unlock_dec; spin_unlock(&cookie->lock); fscache_stat(&fscache_n_retrieval_ops); @@ -541,6 +585,8 @@ error: _leave(" = %d", ret); return ret; +nobufs_unlock_dec: + atomic_dec(&object->n_reads); nobufs_unlock: spin_unlock(&cookie->lock); kfree(op); @@ -577,12 +623,18 @@ int __fscache_alloc_page(struct fscache_cookie *cookie, ASSERTCMP(cookie->def->type, !=, FSCACHE_COOKIE_TYPE_INDEX); ASSERTCMP(page, !=, NULL); + if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) { + _leave(" = -ENOBUFS [invalidating]"); + return -ENOBUFS; + } + if (fscache_wait_for_deferred_lookup(cookie) < 0) return -ERESTARTSYS; op = fscache_alloc_retrieval(page->mapping, NULL, NULL); if (!op) return -ENOMEM; + op->n_pages = 1; spin_lock(&cookie->lock); @@ -658,9 +710,27 @@ static void fscache_write_op(struct fscache_operation *_op) spin_lock(&object->lock); cookie = object->cookie; - if (!fscache_object_is_active(object) || !cookie) { + if (!fscache_object_is_active(object)) { + /* If we get here, then the on-disk cache object likely longer + * exists, so we should just cancel this write operation. + */ + spin_unlock(&object->lock); + fscache_op_complete(&op->op, false); + _leave(" [inactive]"); + return; + } + + if (!cookie) { + /* If we get here, then the cookie belonging to the object was + * detached, probably by the cookie being withdrawn due to + * memory pressure, which means that the pages we might write + * to the cache from no longer exist - therefore, we can just + * cancel this write operation. + */ spin_unlock(&object->lock); - _leave(""); + fscache_op_complete(&op->op, false); + _leave(" [cancel] op{f=%lx s=%u} obj{s=%u f=%lx}", + _op->flags, _op->state, object->state, object->flags); return; } @@ -696,6 +766,7 @@ static void fscache_write_op(struct fscache_operation *_op) fscache_end_page_write(object, page); if (ret < 0) { fscache_abort_object(object); + fscache_op_complete(&op->op, true); } else { fscache_enqueue_operation(&op->op); } @@ -710,6 +781,38 @@ superseded: spin_unlock(&cookie->stores_lock); clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags); spin_unlock(&object->lock); + fscache_op_complete(&op->op, true); + _leave(""); +} + +/* + * Clear the pages pending writing for invalidation + */ +void fscache_invalidate_writes(struct fscache_cookie *cookie) +{ + struct page *page; + void *results[16]; + int n, i; + + _enter(""); + + while (spin_lock(&cookie->stores_lock), + n = radix_tree_gang_lookup_tag(&cookie->stores, results, 0, + ARRAY_SIZE(results), + FSCACHE_COOKIE_PENDING_TAG), + n > 0) { + for (i = n - 1; i >= 0; i--) { + page = results[i]; + radix_tree_delete(&cookie->stores, page->index); + } + + spin_unlock(&cookie->stores_lock); + + for (i = n - 1; i >= 0; i--) + page_cache_release(results[i]); + } + + spin_unlock(&cookie->stores_lock); _leave(""); } @@ -759,7 +862,12 @@ int __fscache_write_page(struct fscache_cookie *cookie, fscache_stat(&fscache_n_stores); - op = kzalloc(sizeof(*op), GFP_NOIO); + if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) { + _leave(" = -ENOBUFS [invalidating]"); + return -ENOBUFS; + } + + op = kzalloc(sizeof(*op), GFP_NOIO | __GFP_NOMEMALLOC | __GFP_NORETRY); if (!op) goto nomem; @@ -915,6 +1023,40 @@ done: EXPORT_SYMBOL(__fscache_uncache_page); /** + * fscache_mark_page_cached - Mark a page as being cached + * @op: The retrieval op pages are being marked for + * @page: The page to be marked + * + * Mark a netfs page as being cached. After this is called, the netfs + * must call fscache_uncache_page() to remove the mark. + */ +void fscache_mark_page_cached(struct fscache_retrieval *op, struct page *page) +{ + struct fscache_cookie *cookie = op->op.object->cookie; + +#ifdef CONFIG_FSCACHE_STATS + atomic_inc(&fscache_n_marks); +#endif + + _debug("- mark %p{%lx}", page, page->index); + if (TestSetPageFsCache(page)) { + static bool once_only; + if (!once_only) { + once_only = true; + printk(KERN_WARNING "FS-Cache:" + " Cookie type %s marked page %lx" + " multiple times\n", + cookie->def->name, page->index); + } + } + + if (cookie->def->mark_page_cached) + cookie->def->mark_page_cached(cookie->netfs_data, + op->mapping, page); +} +EXPORT_SYMBOL(fscache_mark_page_cached); + +/** * fscache_mark_pages_cached - Mark pages as being cached * @op: The retrieval op pages are being marked for * @pagevec: The pages to be marked @@ -925,32 +1067,11 @@ EXPORT_SYMBOL(__fscache_uncache_page); void fscache_mark_pages_cached(struct fscache_retrieval *op, struct pagevec *pagevec) { - struct fscache_cookie *cookie = op->op.object->cookie; unsigned long loop; -#ifdef CONFIG_FSCACHE_STATS - atomic_add(pagevec->nr, &fscache_n_marks); -#endif - - for (loop = 0; loop < pagevec->nr; loop++) { - struct page *page = pagevec->pages[loop]; - - _debug("- mark %p{%lx}", page, page->index); - if (TestSetPageFsCache(page)) { - static bool once_only; - if (!once_only) { - once_only = true; - printk(KERN_WARNING "FS-Cache:" - " Cookie type %s marked page %lx" - " multiple times\n", - cookie->def->name, page->index); - } - } - } + for (loop = 0; loop < pagevec->nr; loop++) + fscache_mark_page_cached(op, pagevec->pages[loop]); - if (cookie->def->mark_pages_cached) - cookie->def->mark_pages_cached(cookie->netfs_data, - op->mapping, pagevec); pagevec_reinit(pagevec); } EXPORT_SYMBOL(fscache_mark_pages_cached); diff --git a/fs/fscache/stats.c b/fs/fscache/stats.c index 4765190d537..8179e8bc4a3 100644 --- a/fs/fscache/stats.c +++ b/fs/fscache/stats.c @@ -69,6 +69,7 @@ atomic_t fscache_n_store_vmscan_not_storing; atomic_t fscache_n_store_vmscan_gone; atomic_t fscache_n_store_vmscan_busy; atomic_t fscache_n_store_vmscan_cancelled; +atomic_t fscache_n_store_vmscan_wait; atomic_t fscache_n_marks; atomic_t fscache_n_uncaches; @@ -80,6 +81,9 @@ atomic_t fscache_n_acquires_ok; atomic_t fscache_n_acquires_nobufs; atomic_t fscache_n_acquires_oom; +atomic_t fscache_n_invalidates; +atomic_t fscache_n_invalidates_run; + atomic_t fscache_n_updates; atomic_t fscache_n_updates_null; atomic_t fscache_n_updates_run; @@ -112,6 +116,7 @@ atomic_t fscache_n_cop_alloc_object; atomic_t fscache_n_cop_lookup_object; atomic_t fscache_n_cop_lookup_complete; atomic_t fscache_n_cop_grab_object; +atomic_t fscache_n_cop_invalidate_object; atomic_t fscache_n_cop_update_object; atomic_t fscache_n_cop_drop_object; atomic_t fscache_n_cop_put_object; @@ -168,6 +173,10 @@ static int fscache_stats_show(struct seq_file *m, void *v) atomic_read(&fscache_n_object_created), atomic_read(&fscache_n_object_lookups_timed_out)); + seq_printf(m, "Invals : n=%u run=%u\n", + atomic_read(&fscache_n_invalidates), + atomic_read(&fscache_n_invalidates_run)); + seq_printf(m, "Updates: n=%u nul=%u run=%u\n", atomic_read(&fscache_n_updates), atomic_read(&fscache_n_updates_null), @@ -224,11 +233,12 @@ static int fscache_stats_show(struct seq_file *m, void *v) atomic_read(&fscache_n_store_radix_deletes), atomic_read(&fscache_n_store_pages_over_limit)); - seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u\n", + seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u wt=%u\n", atomic_read(&fscache_n_store_vmscan_not_storing), atomic_read(&fscache_n_store_vmscan_gone), atomic_read(&fscache_n_store_vmscan_busy), - atomic_read(&fscache_n_store_vmscan_cancelled)); + atomic_read(&fscache_n_store_vmscan_cancelled), + atomic_read(&fscache_n_store_vmscan_wait)); seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n", atomic_read(&fscache_n_op_pend), @@ -246,7 +256,8 @@ static int fscache_stats_show(struct seq_file *m, void *v) atomic_read(&fscache_n_cop_lookup_object), atomic_read(&fscache_n_cop_lookup_complete), atomic_read(&fscache_n_cop_grab_object)); - seq_printf(m, "CacheOp: upo=%d dro=%d pto=%d atc=%d syn=%d\n", + seq_printf(m, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d\n", + atomic_read(&fscache_n_cop_invalidate_object), atomic_read(&fscache_n_cop_update_object), atomic_read(&fscache_n_cop_drop_object), atomic_read(&fscache_n_cop_put_object), diff --git a/fs/fuse/Kconfig b/fs/fuse/Kconfig index 0cf160a94ed..1b2f6c2c3aa 100644 --- a/fs/fuse/Kconfig +++ b/fs/fuse/Kconfig @@ -4,12 +4,24 @@ config FUSE_FS With FUSE it is possible to implement a fully functional filesystem in a userspace program. - There's also companion library: libfuse. This library along with - utilities is available from the FUSE homepage: + There's also a companion library: libfuse2. This library is available + from the FUSE homepage: <http://fuse.sourceforge.net/> + although chances are your distribution already has that library + installed if you've installed the "fuse" package itself. See <file:Documentation/filesystems/fuse.txt> for more information. See <file:Documentation/Changes> for needed library/utility version. If you want to develop a userspace FS, or if you want to use a filesystem based on FUSE, answer Y or M. + +config CUSE + tristate "Character device in Userspace support" + depends on FUSE_FS + help + This FUSE extension allows character devices to be + implemented in userspace. + + If you want to develop or use a userspace character device + based on CUSE, answer Y or M. diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c index ee8d5504229..e397b675b02 100644 --- a/fs/fuse/cuse.c +++ b/fs/fuse/cuse.c @@ -45,7 +45,6 @@ #include <linux/miscdevice.h> #include <linux/mutex.h> #include <linux/slab.h> -#include <linux/spinlock.h> #include <linux/stat.h> #include <linux/module.h> @@ -63,7 +62,7 @@ struct cuse_conn { bool unrestricted_ioctl; }; -static DEFINE_SPINLOCK(cuse_lock); /* protects cuse_conntbl */ +static DEFINE_MUTEX(cuse_lock); /* protects registration */ static struct list_head cuse_conntbl[CUSE_CONNTBL_LEN]; static struct class *cuse_class; @@ -114,14 +113,14 @@ static int cuse_open(struct inode *inode, struct file *file) int rc; /* look up and get the connection */ - spin_lock(&cuse_lock); + mutex_lock(&cuse_lock); list_for_each_entry(pos, cuse_conntbl_head(devt), list) if (pos->dev->devt == devt) { fuse_conn_get(&pos->fc); cc = pos; break; } - spin_unlock(&cuse_lock); + mutex_unlock(&cuse_lock); /* dead? */ if (!cc) @@ -267,7 +266,7 @@ static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp) static int cuse_parse_devinfo(char *p, size_t len, struct cuse_devinfo *devinfo) { char *end = p + len; - char *key, *val; + char *uninitialized_var(key), *uninitialized_var(val); int rc; while (true) { @@ -305,14 +304,14 @@ static void cuse_gendev_release(struct device *dev) */ static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req) { - struct cuse_conn *cc = fc_to_cc(fc); + struct cuse_conn *cc = fc_to_cc(fc), *pos; struct cuse_init_out *arg = req->out.args[0].value; struct page *page = req->pages[0]; struct cuse_devinfo devinfo = { }; struct device *dev; struct cdev *cdev; dev_t devt; - int rc; + int rc, i; if (req->out.h.error || arg->major != FUSE_KERNEL_VERSION || arg->minor < 11) { @@ -356,15 +355,24 @@ static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req) dev_set_drvdata(dev, cc); dev_set_name(dev, "%s", devinfo.name); + mutex_lock(&cuse_lock); + + /* make sure the device-name is unique */ + for (i = 0; i < CUSE_CONNTBL_LEN; ++i) { + list_for_each_entry(pos, &cuse_conntbl[i], list) + if (!strcmp(dev_name(pos->dev), dev_name(dev))) + goto err_unlock; + } + rc = device_add(dev); if (rc) - goto err_device; + goto err_unlock; /* register cdev */ rc = -ENOMEM; cdev = cdev_alloc(); if (!cdev) - goto err_device; + goto err_unlock; cdev->owner = THIS_MODULE; cdev->ops = &cuse_frontend_fops; @@ -377,9 +385,8 @@ static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req) cc->cdev = cdev; /* make the device available */ - spin_lock(&cuse_lock); list_add(&cc->list, cuse_conntbl_head(devt)); - spin_unlock(&cuse_lock); + mutex_unlock(&cuse_lock); /* announce device availability */ dev_set_uevent_suppress(dev, 0); @@ -391,7 +398,8 @@ out: err_cdev: cdev_del(cdev); -err_device: +err_unlock: + mutex_unlock(&cuse_lock); put_device(dev); err_region: unregister_chrdev_region(devt, 1); @@ -520,9 +528,9 @@ static int cuse_channel_release(struct inode *inode, struct file *file) int rc; /* remove from the conntbl, no more access from this point on */ - spin_lock(&cuse_lock); + mutex_lock(&cuse_lock); list_del_init(&cc->list); - spin_unlock(&cuse_lock); + mutex_unlock(&cuse_lock); /* remove device */ if (cc->dev) diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 8c23fa7a91e..e83351aa5ba 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -92,8 +92,8 @@ static void __fuse_put_request(struct fuse_req *req) static void fuse_req_init_context(struct fuse_req *req) { - req->in.h.uid = current_fsuid(); - req->in.h.gid = current_fsgid(); + req->in.h.uid = from_kuid_munged(&init_user_ns, current_fsuid()); + req->in.h.gid = from_kgid_munged(&init_user_ns, current_fsgid()); req->in.h.pid = current->pid; } @@ -692,8 +692,6 @@ static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep) struct page *oldpage = *pagep; struct page *newpage; struct pipe_buffer *buf = cs->pipebufs; - struct address_space *mapping; - pgoff_t index; unlock_request(cs->fc, cs->req); fuse_copy_finish(cs); @@ -724,9 +722,6 @@ static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep) if (fuse_check_page(newpage) != 0) goto out_fallback_unlock; - mapping = oldpage->mapping; - index = oldpage->index; - /* * This is a new and locked page, it shouldn't be mapped or * have any special flags on it diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 324bc085053..b7c09f9eb40 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -818,8 +818,8 @@ static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr, stat->ino = attr->ino; stat->mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777); stat->nlink = attr->nlink; - stat->uid = attr->uid; - stat->gid = attr->gid; + stat->uid = make_kuid(&init_user_ns, attr->uid); + stat->gid = make_kgid(&init_user_ns, attr->gid); stat->rdev = inode->i_rdev; stat->atime.tv_sec = attr->atime; stat->atime.tv_nsec = attr->atimensec; @@ -1007,12 +1007,12 @@ int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task) rcu_read_lock(); ret = 0; cred = __task_cred(task); - if (cred->euid == fc->user_id && - cred->suid == fc->user_id && - cred->uid == fc->user_id && - cred->egid == fc->group_id && - cred->sgid == fc->group_id && - cred->gid == fc->group_id) + if (uid_eq(cred->euid, fc->user_id) && + uid_eq(cred->suid, fc->user_id) && + uid_eq(cred->uid, fc->user_id) && + gid_eq(cred->egid, fc->group_id) && + gid_eq(cred->sgid, fc->group_id) && + gid_eq(cred->gid, fc->group_id)) ret = 1; rcu_read_unlock(); @@ -1306,9 +1306,9 @@ static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg) if (ivalid & ATTR_MODE) arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode; if (ivalid & ATTR_UID) - arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid; + arg->valid |= FATTR_UID, arg->uid = from_kuid(&init_user_ns, iattr->ia_uid); if (ivalid & ATTR_GID) - arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid; + arg->valid |= FATTR_GID, arg->gid = from_kgid(&init_user_ns, iattr->ia_gid); if (ivalid & ATTR_SIZE) arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size; if (ivalid & ATTR_ATIME) { diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 78d2837bc94..f3ab824fa30 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -1599,19 +1599,19 @@ static sector_t fuse_bmap(struct address_space *mapping, sector_t block) return err ? 0 : outarg.block; } -static loff_t fuse_file_llseek(struct file *file, loff_t offset, int origin) +static loff_t fuse_file_llseek(struct file *file, loff_t offset, int whence) { loff_t retval; struct inode *inode = file->f_path.dentry->d_inode; /* No i_mutex protection necessary for SEEK_CUR and SEEK_SET */ - if (origin == SEEK_CUR || origin == SEEK_SET) - return generic_file_llseek(file, offset, origin); + if (whence == SEEK_CUR || whence == SEEK_SET) + return generic_file_llseek(file, offset, whence); mutex_lock(&inode->i_mutex); retval = fuse_update_attributes(inode, NULL, file, NULL); if (!retval) - retval = generic_file_llseek(file, offset, origin); + retval = generic_file_llseek(file, offset, whence); mutex_unlock(&inode->i_mutex); return retval; @@ -2177,8 +2177,8 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, return ret; } -long fuse_file_fallocate(struct file *file, int mode, loff_t offset, - loff_t length) +static long fuse_file_fallocate(struct file *file, int mode, loff_t offset, + loff_t length) { struct fuse_file *ff = file->private_data; struct fuse_conn *fc = ff->fc; @@ -2213,7 +2213,6 @@ long fuse_file_fallocate(struct file *file, int mode, loff_t offset, return err; } -EXPORT_SYMBOL_GPL(fuse_file_fallocate); static const struct file_operations fuse_file_operations = { .llseek = fuse_file_llseek, diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index e24dd74e306..e105a53fc72 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -333,10 +333,10 @@ struct fuse_conn { atomic_t count; /** The user id for this mount */ - uid_t user_id; + kuid_t user_id; /** The group id for this mount */ - gid_t group_id; + kgid_t group_id; /** The fuse mount flags for this mount */ unsigned flags; diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index f0eda124cff..73ca6b72bea 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -60,8 +60,8 @@ MODULE_PARM_DESC(max_user_congthresh, struct fuse_mount_data { int fd; unsigned rootmode; - unsigned user_id; - unsigned group_id; + kuid_t user_id; + kgid_t group_id; unsigned fd_present:1; unsigned rootmode_present:1; unsigned user_id_present:1; @@ -164,8 +164,8 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, inode->i_ino = fuse_squash_ino(attr->ino); inode->i_mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777); set_nlink(inode, attr->nlink); - inode->i_uid = attr->uid; - inode->i_gid = attr->gid; + inode->i_uid = make_kuid(&init_user_ns, attr->uid); + inode->i_gid = make_kgid(&init_user_ns, attr->gid); inode->i_blocks = attr->blocks; inode->i_atime.tv_sec = attr->atime; inode->i_atime.tv_nsec = attr->atimensec; @@ -492,14 +492,18 @@ static int parse_fuse_opt(char *opt, struct fuse_mount_data *d, int is_bdev) case OPT_USER_ID: if (match_int(&args[0], &value)) return 0; - d->user_id = value; + d->user_id = make_kuid(current_user_ns(), value); + if (!uid_valid(d->user_id)) + return 0; d->user_id_present = 1; break; case OPT_GROUP_ID: if (match_int(&args[0], &value)) return 0; - d->group_id = value; + d->group_id = make_kgid(current_user_ns(), value); + if (!gid_valid(d->group_id)) + return 0; d->group_id_present = 1; break; @@ -540,8 +544,8 @@ static int fuse_show_options(struct seq_file *m, struct dentry *root) struct super_block *sb = root->d_sb; struct fuse_conn *fc = get_fuse_conn_super(sb); - seq_printf(m, ",user_id=%u", fc->user_id); - seq_printf(m, ",group_id=%u", fc->group_id); + seq_printf(m, ",user_id=%u", from_kuid_munged(&init_user_ns, fc->user_id)); + seq_printf(m, ",group_id=%u", from_kgid_munged(&init_user_ns, fc->group_id)); if (fc->flags & FUSE_DEFAULT_PERMISSIONS) seq_puts(m, ",default_permissions"); if (fc->flags & FUSE_ALLOW_OTHER) @@ -989,7 +993,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent) if (!file) goto err; - if (file->f_op != &fuse_dev_operations) + if ((file->f_op != &fuse_dev_operations) || + (file->f_cred->user_ns != &init_user_ns)) goto err_fput; fc = kmalloc(sizeof(*fc), GFP_KERNEL); diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index 01c4975da4b..30de4f2a2ea 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -643,7 +643,7 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping, goto out_unlock; requested = data_blocks + ind_blocks; - error = gfs2_inplace_reserve(ip, requested); + error = gfs2_inplace_reserve(ip, requested, 0); if (error) goto out_qunlock; } diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 1fd3ae237bd..a68e91bcef3 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -991,6 +991,41 @@ unlock: return err; } +/** + * gfs2_journaled_truncate - Wrapper for truncate_pagecache for jdata files + * @inode: The inode being truncated + * @oldsize: The original (larger) size + * @newsize: The new smaller size + * + * With jdata files, we have to journal a revoke for each block which is + * truncated. As a result, we need to split this into separate transactions + * if the number of pages being truncated gets too large. + */ + +#define GFS2_JTRUNC_REVOKES 8192 + +static int gfs2_journaled_truncate(struct inode *inode, u64 oldsize, u64 newsize) +{ + struct gfs2_sbd *sdp = GFS2_SB(inode); + u64 max_chunk = GFS2_JTRUNC_REVOKES * sdp->sd_vfs->s_blocksize; + u64 chunk; + int error; + + while (oldsize != newsize) { + chunk = oldsize - newsize; + if (chunk > max_chunk) + chunk = max_chunk; + truncate_pagecache(inode, oldsize, oldsize - chunk); + oldsize -= chunk; + gfs2_trans_end(sdp); + error = gfs2_trans_begin(sdp, RES_DINODE, GFS2_JTRUNC_REVOKES); + if (error) + return error; + } + + return 0; +} + static int trunc_start(struct inode *inode, u64 oldsize, u64 newsize) { struct gfs2_inode *ip = GFS2_I(inode); @@ -1000,8 +1035,10 @@ static int trunc_start(struct inode *inode, u64 oldsize, u64 newsize) int journaled = gfs2_is_jdata(ip); int error; - error = gfs2_trans_begin(sdp, - RES_DINODE + (journaled ? RES_JDATA : 0), 0); + if (journaled) + error = gfs2_trans_begin(sdp, RES_DINODE + RES_JDATA, GFS2_JTRUNC_REVOKES); + else + error = gfs2_trans_begin(sdp, RES_DINODE, 0); if (error) return error; @@ -1026,7 +1063,16 @@ static int trunc_start(struct inode *inode, u64 oldsize, u64 newsize) ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME; gfs2_dinode_out(ip, dibh->b_data); - truncate_pagecache(inode, oldsize, newsize); + if (journaled) + error = gfs2_journaled_truncate(inode, oldsize, newsize); + else + truncate_pagecache(inode, oldsize, newsize); + + if (error) { + brelse(dibh); + return error; + } + out_brelse: brelse(dibh); out: @@ -1178,7 +1224,7 @@ static int do_grow(struct inode *inode, u64 size) if (error) return error; - error = gfs2_inplace_reserve(ip, 1); + error = gfs2_inplace_reserve(ip, 1, 0); if (error) goto do_grow_qunlock; unstuff = 1; diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c index 259b088cfc4..9a35670fdc3 100644 --- a/fs/gfs2/dir.c +++ b/fs/gfs2/dir.c @@ -1676,16 +1676,11 @@ int gfs2_dir_add(struct inode *inode, const struct qstr *name, be16_add_cpu(&leaf->lf_entries, 1); } brelse(bh); - error = gfs2_meta_inode_buffer(ip, &bh); - if (error) - break; - gfs2_trans_add_bh(ip->i_gl, bh, 1); ip->i_entries++; ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME; if (S_ISDIR(nip->i_inode.i_mode)) inc_nlink(&ip->i_inode); - gfs2_dinode_out(ip, bh->b_data); - brelse(bh); + mark_inode_dirty(inode); error = 0; break; } diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 0def0504afc..991ab2d484d 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -44,7 +44,7 @@ * gfs2_llseek - seek to a location in a file * @file: the file * @offset: the offset - * @origin: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END) + * @whence: Where to seek from (SEEK_SET, SEEK_CUR, or SEEK_END) * * SEEK_END requires the glock for the file because it references the * file's size. @@ -52,26 +52,26 @@ * Returns: The new offset, or errno */ -static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin) +static loff_t gfs2_llseek(struct file *file, loff_t offset, int whence) { struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); struct gfs2_holder i_gh; loff_t error; - switch (origin) { + switch (whence) { case SEEK_END: /* These reference inode->i_size */ case SEEK_DATA: case SEEK_HOLE: error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); if (!error) { - error = generic_file_llseek(file, offset, origin); + error = generic_file_llseek(file, offset, whence); gfs2_glock_dq_uninit(&i_gh); } break; case SEEK_CUR: case SEEK_SET: - error = generic_file_llseek(file, offset, origin); + error = generic_file_llseek(file, offset, whence); break; default: error = -EINVAL; @@ -432,7 +432,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) if (ret) goto out_unlock; gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks); - ret = gfs2_inplace_reserve(ip, data_blocks + ind_blocks); + ret = gfs2_inplace_reserve(ip, data_blocks + ind_blocks, 0); if (ret) goto out_quota_unlock; @@ -516,15 +516,13 @@ static int gfs2_mmap(struct file *file, struct vm_area_struct *vma) struct gfs2_holder i_gh; int error; - gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); - error = gfs2_glock_nq(&i_gh); - if (error == 0) { - file_accessed(file); - gfs2_glock_dq(&i_gh); - } - gfs2_holder_uninit(&i_gh); + error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, + &i_gh); if (error) return error; + /* grab lock to update inode */ + gfs2_glock_dq_uninit(&i_gh); + file_accessed(file); } vma->vm_ops = &gfs2_vm_ops; @@ -677,10 +675,8 @@ static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov, size_t writesize = iov_length(iov, nr_segs); struct dentry *dentry = file->f_dentry; struct gfs2_inode *ip = GFS2_I(dentry->d_inode); - struct gfs2_sbd *sdp; int ret; - sdp = GFS2_SB(file->f_mapping->host); ret = gfs2_rs_alloc(ip); if (ret) return ret; @@ -829,7 +825,7 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset, retry: gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks); - error = gfs2_inplace_reserve(ip, data_blocks + ind_blocks); + error = gfs2_inplace_reserve(ip, data_blocks + ind_blocks, 0); if (error) { if (error == -ENOSPC && bytes > sdp->sd_sb.sb_bsize) { bytes >>= 1; diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index e6c2fd53cab..992c5c0cb50 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -55,8 +55,6 @@ struct gfs2_glock_iter { typedef void (*glock_examiner) (struct gfs2_glock * gl); -static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl); -#define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) { __dump_glock(NULL, gl); BUG(); } } while(0) static void do_xmote(struct gfs2_glock *gl, struct gfs2_holder *gh, unsigned int target); static struct dentry *gfs2_root; @@ -107,10 +105,12 @@ static void gfs2_glock_dealloc(struct rcu_head *rcu) { struct gfs2_glock *gl = container_of(rcu, struct gfs2_glock, gl_rcu); - if (gl->gl_ops->go_flags & GLOF_ASPACE) + if (gl->gl_ops->go_flags & GLOF_ASPACE) { kmem_cache_free(gfs2_glock_aspace_cachep, gl); - else + } else { + kfree(gl->gl_lksb.sb_lvbptr); kmem_cache_free(gfs2_glock_cachep, gl); + } } void gfs2_glock_free(struct gfs2_glock *gl) @@ -537,8 +537,8 @@ __acquires(&gl->gl_spin) (lck_flags & (LM_FLAG_TRY|LM_FLAG_TRY_1CB))) clear_bit(GLF_BLOCKING, &gl->gl_flags); spin_unlock(&gl->gl_spin); - if (glops->go_xmote_th) - glops->go_xmote_th(gl); + if (glops->go_sync) + glops->go_sync(gl); if (test_bit(GLF_INVALIDATE_IN_PROGRESS, &gl->gl_flags)) glops->go_inval(gl, target == LM_ST_DEFERRED ? 0 : DIO_METADATA); clear_bit(GLF_INVALIDATE_IN_PROGRESS, &gl->gl_flags); @@ -547,7 +547,10 @@ __acquires(&gl->gl_spin) if (sdp->sd_lockstruct.ls_ops->lm_lock) { /* lock_dlm */ ret = sdp->sd_lockstruct.ls_ops->lm_lock(gl, target, lck_flags); - GLOCK_BUG_ON(gl, ret); + if (ret) { + printk(KERN_ERR "GFS2: lm_lock ret %d\n", ret); + GLOCK_BUG_ON(gl, 1); + } } else { /* lock_nolock */ finish_xmote(gl, target); if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0) @@ -736,6 +739,16 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, if (!gl) return -ENOMEM; + memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb)); + + if (glops->go_flags & GLOF_LVB) { + gl->gl_lksb.sb_lvbptr = kzalloc(GFS2_MIN_LVB_SIZE, GFP_KERNEL); + if (!gl->gl_lksb.sb_lvbptr) { + kmem_cache_free(cachep, gl); + return -ENOMEM; + } + } + atomic_inc(&sdp->sd_glock_disposal); gl->gl_sbd = sdp; gl->gl_flags = 0; @@ -753,9 +766,6 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, preempt_enable(); gl->gl_stats.stats[GFS2_LKS_DCOUNT] = 0; gl->gl_stats.stats[GFS2_LKS_QCOUNT] = 0; - memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb)); - memset(gl->gl_lvb, 0, 32 * sizeof(char)); - gl->gl_lksb.sb_lvbptr = gl->gl_lvb; gl->gl_tchange = jiffies; gl->gl_object = NULL; gl->gl_hold_time = GL_GLOCK_DFT_HOLD; @@ -768,7 +778,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, mapping->host = s->s_bdev->bd_inode; mapping->flags = 0; mapping_set_gfp_mask(mapping, GFP_NOFS); - mapping->assoc_mapping = NULL; + mapping->private_data = NULL; mapping->backing_dev_info = s->s_bdi; mapping->writeback_index = 0; } @@ -777,6 +787,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, tmp = search_bucket(hash, sdp, &name); if (tmp) { spin_unlock_bucket(hash); + kfree(gl->gl_lksb.sb_lvbptr); kmem_cache_free(cachep, gl); atomic_dec(&sdp->sd_glock_disposal); gl = tmp; @@ -1013,7 +1024,7 @@ trap_recursive: printk(KERN_ERR "pid: %d\n", pid_nr(gh->gh_owner_pid)); printk(KERN_ERR "lock type: %d req lock state : %d\n", gh->gh_gl->gl_name.ln_type, gh->gh_state); - __dump_glock(NULL, gl); + gfs2_dump_glock(NULL, gl); BUG(); } @@ -1508,7 +1519,7 @@ static int dump_glock(struct seq_file *seq, struct gfs2_glock *gl) { int ret; spin_lock(&gl->gl_spin); - ret = __dump_glock(seq, gl); + ret = gfs2_dump_glock(seq, gl); spin_unlock(&gl->gl_spin); return ret; } @@ -1528,6 +1539,7 @@ static void dump_glock_func(struct gfs2_glock *gl) void gfs2_gl_hash_clear(struct gfs2_sbd *sdp) { + set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags); glock_hash_walk(clear_glock, sdp); flush_workqueue(glock_workqueue); wait_event(sdp->sd_glock_wait, atomic_read(&sdp->sd_glock_disposal) == 0); @@ -1655,7 +1667,7 @@ static const char *gflags2str(char *buf, const struct gfs2_glock *gl) } /** - * __dump_glock - print information about a glock + * gfs2_dump_glock - print information about a glock * @seq: The seq_file struct * @gl: the glock * @@ -1672,7 +1684,7 @@ static const char *gflags2str(char *buf, const struct gfs2_glock *gl) * Returns: 0 on success, -ENOBUFS when we run out of space */ -static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl) +int gfs2_dump_glock(struct seq_file *seq, const struct gfs2_glock *gl) { const struct gfs2_glock_operations *glops = gl->gl_ops; unsigned long long dtime; diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index 307ac31df78..fd580b7861d 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -178,33 +178,33 @@ static inline struct address_space *gfs2_glock2aspace(struct gfs2_glock *gl) return NULL; } -int gfs2_glock_get(struct gfs2_sbd *sdp, - u64 number, const struct gfs2_glock_operations *glops, - int create, struct gfs2_glock **glp); -void gfs2_glock_hold(struct gfs2_glock *gl); -void gfs2_glock_put_nolock(struct gfs2_glock *gl); -void gfs2_glock_put(struct gfs2_glock *gl); -void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, unsigned flags, - struct gfs2_holder *gh); -void gfs2_holder_reinit(unsigned int state, unsigned flags, - struct gfs2_holder *gh); -void gfs2_holder_uninit(struct gfs2_holder *gh); -int gfs2_glock_nq(struct gfs2_holder *gh); -int gfs2_glock_poll(struct gfs2_holder *gh); -int gfs2_glock_wait(struct gfs2_holder *gh); -void gfs2_glock_dq(struct gfs2_holder *gh); -void gfs2_glock_dq_wait(struct gfs2_holder *gh); - -void gfs2_glock_dq_uninit(struct gfs2_holder *gh); -int gfs2_glock_nq_num(struct gfs2_sbd *sdp, - u64 number, const struct gfs2_glock_operations *glops, - unsigned int state, int flags, struct gfs2_holder *gh); - -int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs); -void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs); -void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs); - -__printf(2, 3) +extern int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, + const struct gfs2_glock_operations *glops, + int create, struct gfs2_glock **glp); +extern void gfs2_glock_hold(struct gfs2_glock *gl); +extern void gfs2_glock_put_nolock(struct gfs2_glock *gl); +extern void gfs2_glock_put(struct gfs2_glock *gl); +extern void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, + unsigned flags, struct gfs2_holder *gh); +extern void gfs2_holder_reinit(unsigned int state, unsigned flags, + struct gfs2_holder *gh); +extern void gfs2_holder_uninit(struct gfs2_holder *gh); +extern int gfs2_glock_nq(struct gfs2_holder *gh); +extern int gfs2_glock_poll(struct gfs2_holder *gh); +extern int gfs2_glock_wait(struct gfs2_holder *gh); +extern void gfs2_glock_dq(struct gfs2_holder *gh); +extern void gfs2_glock_dq_wait(struct gfs2_holder *gh); +extern void gfs2_glock_dq_uninit(struct gfs2_holder *gh); +extern int gfs2_glock_nq_num(struct gfs2_sbd *sdp, u64 number, + const struct gfs2_glock_operations *glops, + unsigned int state, int flags, + struct gfs2_holder *gh); +extern int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs); +extern void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs); +extern void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs); +extern int gfs2_dump_glock(struct seq_file *seq, const struct gfs2_glock *gl); +#define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) { gfs2_dump_glock(NULL, gl); BUG(); } } while(0) +extern __printf(2, 3) void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...); /** diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c index 32cc4fde975..78d4184ffc7 100644 --- a/fs/gfs2/glops.c +++ b/fs/gfs2/glops.c @@ -74,7 +74,7 @@ static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync) gfs2_trans_add_revoke(sdp, bd); } - BUG_ON(!fsync && atomic_read(&gl->gl_ail_count)); + GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count)); spin_unlock(&sdp->sd_ail_lock); gfs2_log_unlock(sdp); } @@ -96,7 +96,7 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl) tr.tr_ip = (unsigned long)__builtin_return_address(0); sb_start_intwrite(sdp->sd_vfs); gfs2_log_reserve(sdp, tr.tr_reserved); - BUG_ON(current->journal_info); + WARN_ON_ONCE(current->journal_info); current->journal_info = &tr; __gfs2_ail_flush(gl, 0); @@ -139,7 +139,7 @@ static void rgrp_go_sync(struct gfs2_glock *gl) if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) return; - BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE); + GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE); gfs2_log_flush(gl->gl_sbd, gl); filemap_fdatawrite(metamapping); @@ -168,7 +168,7 @@ static void rgrp_go_inval(struct gfs2_glock *gl, int flags) { struct address_space *mapping = gfs2_glock2aspace(gl); - BUG_ON(!(flags & DIO_METADATA)); + WARN_ON_ONCE(!(flags & DIO_METADATA)); gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count)); truncate_inode_pages(mapping, 0); @@ -197,7 +197,7 @@ static void inode_go_sync(struct gfs2_glock *gl) if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) return; - BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE); + GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE); gfs2_log_flush(gl->gl_sbd, gl); filemap_fdatawrite(metamapping); @@ -536,7 +536,7 @@ const struct gfs2_glock_operations gfs2_meta_glops = { }; const struct gfs2_glock_operations gfs2_inode_glops = { - .go_xmote_th = inode_go_sync, + .go_sync = inode_go_sync, .go_inval = inode_go_inval, .go_demote_ok = inode_go_demote_ok, .go_lock = inode_go_lock, @@ -546,17 +546,17 @@ const struct gfs2_glock_operations gfs2_inode_glops = { }; const struct gfs2_glock_operations gfs2_rgrp_glops = { - .go_xmote_th = rgrp_go_sync, + .go_sync = rgrp_go_sync, .go_inval = rgrp_go_inval, .go_lock = gfs2_rgrp_go_lock, .go_unlock = gfs2_rgrp_go_unlock, .go_dump = gfs2_rgrp_dump, .go_type = LM_TYPE_RGRP, - .go_flags = GLOF_ASPACE, + .go_flags = GLOF_ASPACE | GLOF_LVB, }; const struct gfs2_glock_operations gfs2_trans_glops = { - .go_xmote_th = trans_go_sync, + .go_sync = trans_go_sync, .go_xmote_bh = trans_go_xmote_bh, .go_demote_ok = trans_go_demote_ok, .go_type = LM_TYPE_NONDISK, @@ -577,6 +577,7 @@ const struct gfs2_glock_operations gfs2_nondisk_glops = { const struct gfs2_glock_operations gfs2_quota_glops = { .go_type = LM_TYPE_QUOTA, + .go_flags = GLOF_LVB, }; const struct gfs2_glock_operations gfs2_journal_glops = { diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index 3d469d37345..c373a24fedd 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -205,7 +205,7 @@ struct lm_lockname { struct gfs2_glock_operations { - void (*go_xmote_th) (struct gfs2_glock *gl); + void (*go_sync) (struct gfs2_glock *gl); int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); void (*go_inval) (struct gfs2_glock *gl, int flags); int (*go_demote_ok) (const struct gfs2_glock *gl); @@ -216,6 +216,7 @@ struct gfs2_glock_operations { const int go_type; const unsigned long go_flags; #define GLOF_ASPACE 1 +#define GLOF_LVB 2 }; enum { @@ -321,7 +322,6 @@ struct gfs2_glock { ktime_t gl_dstamp; struct gfs2_lkstats gl_stats; struct dlm_lksb gl_lksb; - char gl_lvb[32]; unsigned long gl_tchange; void *gl_object; @@ -539,6 +539,7 @@ enum { SDF_DEMOTE = 5, SDF_NOJOURNALID = 6, SDF_RORECOVERY = 7, /* read only recovery */ + SDF_SKIP_DLM_UNLOCK = 8, }; #define GFS2_FSNAME_LEN 256 @@ -621,6 +622,7 @@ struct gfs2_sbd { u32 sd_hash_bsize_shift; u32 sd_hash_ptrs; /* Number of pointers in a hash block */ u32 sd_qc_per_block; + u32 sd_blocks_per_bitmap; u32 sd_max_dirres; /* Max blocks needed to add a directory entry */ u32 sd_max_height; /* Max height of a file's metadata tree */ u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1]; diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index 381893ceefa..2b6f5698ef1 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -364,34 +364,34 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name, return 0; } -static void munge_mode_uid_gid(struct gfs2_inode *dip, umode_t *mode, - unsigned int *uid, unsigned int *gid) +static void munge_mode_uid_gid(const struct gfs2_inode *dip, + struct inode *inode) { if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { - if (S_ISDIR(*mode)) - *mode |= S_ISUID; + if (S_ISDIR(inode->i_mode)) + inode->i_mode |= S_ISUID; else if (dip->i_inode.i_uid != current_fsuid()) - *mode &= ~07111; - *uid = dip->i_inode.i_uid; + inode->i_mode &= ~07111; + inode->i_uid = dip->i_inode.i_uid; } else - *uid = current_fsuid(); + inode->i_uid = current_fsuid(); if (dip->i_inode.i_mode & S_ISGID) { - if (S_ISDIR(*mode)) - *mode |= S_ISGID; - *gid = dip->i_inode.i_gid; + if (S_ISDIR(inode->i_mode)) + inode->i_mode |= S_ISGID; + inode->i_gid = dip->i_inode.i_gid; } else - *gid = current_fsgid(); + inode->i_gid = current_fsgid(); } -static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) +static int alloc_dinode(struct gfs2_inode *ip, u32 flags) { - struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); int error; int dblocks = 1; - error = gfs2_inplace_reserve(dip, RES_DINODE); + error = gfs2_inplace_reserve(ip, RES_DINODE, flags); if (error) goto out; @@ -399,12 +399,15 @@ static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) if (error) goto out_ipreserv; - error = gfs2_alloc_blocks(dip, no_addr, &dblocks, 1, generation); + error = gfs2_alloc_blocks(ip, &ip->i_no_addr, &dblocks, 1, &ip->i_generation); + ip->i_no_formal_ino = ip->i_generation; + ip->i_inode.i_ino = ip->i_no_addr; + ip->i_goal = ip->i_no_addr; gfs2_trans_end(sdp); out_ipreserv: - gfs2_inplace_release(dip); + gfs2_inplace_release(ip); out: return error; } @@ -429,52 +432,42 @@ static void gfs2_init_dir(struct buffer_head *dibh, /** * init_dinode - Fill in a new dinode structure * @dip: The directory this inode is being created in - * @gl: The glock covering the new inode - * @inum: The inode number - * @mode: The file permissions - * @uid: The uid of the new inode - * @gid: The gid of the new inode - * @generation: The generation number of the new inode - * @dev: The device number (if a device node) + * @ip: The inode * @symname: The symlink destination (if a symlink) - * @size: The inode size (ignored for directories) * @bhp: The buffer head (returned to caller) * */ -static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, - const struct gfs2_inum_host *inum, umode_t mode, - unsigned int uid, unsigned int gid, - const u64 *generation, dev_t dev, const char *symname, - unsigned size, struct buffer_head **bhp) +static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, + const char *symname, struct buffer_head **bhp) { struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); struct gfs2_dinode *di; struct buffer_head *dibh; struct timespec tv = CURRENT_TIME; - dibh = gfs2_meta_new(gl, inum->no_addr); - gfs2_trans_add_bh(gl, dibh, 1); + dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); + gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); di = (struct gfs2_dinode *)dibh->b_data; - di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); - di->di_num.no_addr = cpu_to_be64(inum->no_addr); - di->di_mode = cpu_to_be32(mode); - di->di_uid = cpu_to_be32(uid); - di->di_gid = cpu_to_be32(gid); + di->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); + di->di_num.no_addr = cpu_to_be64(ip->i_no_addr); + di->di_mode = cpu_to_be32(ip->i_inode.i_mode); + di->di_uid = cpu_to_be32(ip->i_inode.i_uid); + di->di_gid = cpu_to_be32(ip->i_inode.i_gid); di->di_nlink = 0; - di->di_size = cpu_to_be64(size); + di->di_size = cpu_to_be64(ip->i_inode.i_size); di->di_blocks = cpu_to_be64(1); di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); - di->di_major = cpu_to_be32(MAJOR(dev)); - di->di_minor = cpu_to_be32(MINOR(dev)); - di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); - di->di_generation = cpu_to_be64(*generation); + di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); + di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); + di->di_goal_meta = di->di_goal_data = cpu_to_be64(ip->i_no_addr); + di->di_generation = cpu_to_be64(ip->i_generation); di->di_flags = 0; di->__pad1 = 0; - di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); + di->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) ? GFS2_FORMAT_DE : 0); di->di_height = 0; di->__pad2 = 0; di->__pad3 = 0; @@ -487,7 +480,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); memset(&di->di_reserved, 0, sizeof(di->di_reserved)); - switch(mode & S_IFMT) { + switch(ip->i_inode.i_mode & S_IFMT) { case S_IFREG: if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || gfs2_tune_get(sdp, gt_new_files_jdata)) @@ -502,7 +495,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, gfs2_init_dir(dibh, dip); break; case S_IFLNK: - memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, size); + memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); break; } @@ -511,25 +504,22 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, *bhp = dibh; } -static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, - umode_t mode, const struct gfs2_inum_host *inum, - const u64 *generation, dev_t dev, const char *symname, - unsigned int size, struct buffer_head **bhp) +static int make_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, + const char *symname, struct buffer_head **bhp) { + struct inode *inode = &ip->i_inode; struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); - unsigned int uid, gid; int error; - munge_mode_uid_gid(dip, &mode, &uid, &gid); error = gfs2_rindex_update(sdp); if (error) return error; - error = gfs2_quota_lock(dip, uid, gid); + error = gfs2_quota_lock(dip, inode->i_uid, inode->i_gid); if (error) return error; - error = gfs2_quota_check(dip, uid, gid); + error = gfs2_quota_check(dip, inode->i_uid, inode->i_gid); if (error) goto out_quota; @@ -537,8 +527,8 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, if (error) goto out_quota; - init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, symname, size, bhp); - gfs2_quota_change(dip, +1, uid, gid); + init_dinode(dip, ip, symname, bhp); + gfs2_quota_change(dip, +1, inode->i_uid, inode->i_gid); gfs2_trans_end(sdp); out_quota: @@ -570,7 +560,7 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, if (error) goto fail_quota_locks; - error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres); + error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0); if (error) goto fail_quota_locks; @@ -657,19 +647,14 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, struct inode *inode = NULL; struct gfs2_inode *dip = GFS2_I(dir), *ip; struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); - struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; + struct gfs2_glock *io_gl; int error; - u64 generation; struct buffer_head *bh = NULL; + u32 aflags = 0; if (!name->len || name->len > GFS2_FNAMESIZE) return -ENAMETOOLONG; - /* We need a reservation to allocate the new dinode block. The - directory ip temporarily points to the reservation, but this is - being done to get a set of contiguous blocks for the new dinode. - Since this is a create, we don't have a sizehint yet, so it will - have to use the minimum reservation size. */ error = gfs2_rs_alloc(dip); if (error) return error; @@ -688,45 +673,72 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, if (error) goto fail_gunlock; - error = alloc_dinode(dip, &inum.no_addr, &generation); + inode = new_inode(sdp->sd_vfs); + if (!inode) { + gfs2_glock_dq_uninit(ghs); + return -ENOMEM; + } + ip = GFS2_I(inode); + error = gfs2_rs_alloc(ip); if (error) - goto fail_gunlock; - inum.no_formal_ino = generation; + goto fail_free_inode; + + set_bit(GIF_INVALID, &ip->i_flags); + inode->i_mode = mode; + inode->i_rdev = dev; + inode->i_size = size; + munge_mode_uid_gid(dip, inode); + ip->i_goal = dip->i_goal; - error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, - LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); + if ((GFS2_I(sdp->sd_root_dir->d_inode) == dip) || + (dip->i_diskflags & GFS2_DIF_TOPDIR)) + aflags |= GFS2_AF_ORLOV; + + error = alloc_dinode(ip, aflags); if (error) - goto fail_gunlock; + goto fail_free_inode; - error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh); + error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); if (error) - goto fail_gunlock2; + goto fail_free_inode; - inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr, - inum.no_formal_ino, 0); - if (IS_ERR(inode)) + ip->i_gl->gl_object = ip; + error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); + if (error) + goto fail_free_inode; + + error = make_dinode(dip, ip, symname, &bh); + if (error) goto fail_gunlock2; - ip = GFS2_I(inode); - error = gfs2_inode_refresh(ip); + error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); if (error) goto fail_gunlock2; - error = gfs2_rs_alloc(ip); + error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); if (error) goto fail_gunlock2; + ip->i_iopen_gh.gh_gl->gl_object = ip; + gfs2_glock_put(io_gl); + gfs2_set_iop(inode); + insert_inode_hash(inode); + + error = gfs2_inode_refresh(ip); + if (error) + goto fail_gunlock3; + error = gfs2_acl_create(dip, inode); if (error) - goto fail_gunlock2; + goto fail_gunlock3; error = gfs2_security_init(dip, ip, name); if (error) - goto fail_gunlock2; + goto fail_gunlock3; error = link_dinode(dip, name, ip); if (error) - goto fail_gunlock2; + goto fail_gunlock3; if (bh) brelse(bh); @@ -739,8 +751,20 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, d_instantiate(dentry, inode); return 0; +fail_gunlock3: + gfs2_glock_dq_uninit(ghs + 1); + if (ip->i_gl) + gfs2_glock_put(ip->i_gl); + goto fail_gunlock; + fail_gunlock2: gfs2_glock_dq_uninit(ghs + 1); +fail_free_inode: + if (ip->i_gl) + gfs2_glock_put(ip->i_gl); + gfs2_rs_delete(ip); + free_inode_nonrcu(inode); + inode = NULL; fail_gunlock: gfs2_glock_dq_uninit(ghs); if (inode && !IS_ERR(inode)) { @@ -748,7 +772,6 @@ fail_gunlock: iput(inode); } fail: - gfs2_rs_delete(dip); if (bh) brelse(bh); return error; @@ -884,7 +907,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir, if (error) goto out_gunlock; - error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres); + error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres, 0); if (error) goto out_gunlock_q; @@ -977,7 +1000,6 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it * @dip: The parent directory * @name: The name of the entry in the parent directory - * @bh: The inode buffer for the inode to be removed * @inode: The inode to be removed * * Called with all the locks and in a transaction. This will only be @@ -987,8 +1009,7 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, */ static int gfs2_unlink_inode(struct gfs2_inode *dip, - const struct dentry *dentry, - struct buffer_head *bh) + const struct dentry *dentry) { struct inode *inode = dentry->d_inode; struct gfs2_inode *ip = GFS2_I(inode); @@ -1028,7 +1049,6 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry) struct gfs2_sbd *sdp = GFS2_SB(dir); struct inode *inode = dentry->d_inode; struct gfs2_inode *ip = GFS2_I(inode); - struct buffer_head *bh; struct gfs2_holder ghs[3]; struct gfs2_rgrpd *rgd; int error; @@ -1077,14 +1097,9 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry) error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); if (error) - goto out_gunlock; - - error = gfs2_meta_inode_buffer(ip, &bh); - if (error) goto out_end_trans; - error = gfs2_unlink_inode(dip, dentry, bh); - brelse(bh); + error = gfs2_unlink_inode(dip, dentry); out_end_trans: gfs2_trans_end(sdp); @@ -1365,7 +1380,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, if (error) goto out_gunlock; - error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres); + error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres, 0); if (error) goto out_gunlock_q; @@ -1384,14 +1399,8 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, /* Remove the target file, if it exists */ - if (nip) { - struct buffer_head *bh; - error = gfs2_meta_inode_buffer(nip, &bh); - if (error) - goto out_end_trans; - error = gfs2_unlink_inode(ndip, ndentry, bh); - brelse(bh); - } + if (nip) + error = gfs2_unlink_inode(ndip, ndentry); if (dir_rename) { error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c index 0fb6539b0c8..9802de0f85e 100644 --- a/fs/gfs2/lock_dlm.c +++ b/fs/gfs2/lock_dlm.c @@ -120,8 +120,8 @@ static void gdlm_ast(void *arg) gfs2_update_reply_times(gl); BUG_ON(gl->gl_lksb.sb_flags & DLM_SBF_DEMOTED); - if (gl->gl_lksb.sb_flags & DLM_SBF_VALNOTVALID) - memset(gl->gl_lvb, 0, GDLM_LVB_SIZE); + if ((gl->gl_lksb.sb_flags & DLM_SBF_VALNOTVALID) && gl->gl_lksb.sb_lvbptr) + memset(gl->gl_lksb.sb_lvbptr, 0, GDLM_LVB_SIZE); switch (gl->gl_lksb.sb_status) { case -DLM_EUNLOCK: /* Unlocked, so glock can be freed */ @@ -203,8 +203,10 @@ static int make_mode(const unsigned int lmstate) static u32 make_flags(struct gfs2_glock *gl, const unsigned int gfs_flags, const int req) { - u32 lkf = DLM_LKF_VALBLK; - u32 lkid = gl->gl_lksb.sb_lkid; + u32 lkf = 0; + + if (gl->gl_lksb.sb_lvbptr) + lkf |= DLM_LKF_VALBLK; if (gfs_flags & LM_FLAG_TRY) lkf |= DLM_LKF_NOQUEUE; @@ -228,7 +230,7 @@ static u32 make_flags(struct gfs2_glock *gl, const unsigned int gfs_flags, BUG(); } - if (lkid != 0) { + if (gl->gl_lksb.sb_lkid != 0) { lkf |= DLM_LKF_CONVERT; if (test_bit(GLF_BLOCKING, &gl->gl_flags)) lkf |= DLM_LKF_QUECVT; @@ -239,6 +241,7 @@ static u32 make_flags(struct gfs2_glock *gl, const unsigned int gfs_flags, static void gfs2_reverse_hex(char *c, u64 value) { + *c = '0'; while (value) { *c-- = hex_asc[value & 0x0f]; value >>= 4; @@ -278,6 +281,7 @@ static void gdlm_put_lock(struct gfs2_glock *gl) { struct gfs2_sbd *sdp = gl->gl_sbd; struct lm_lockstruct *ls = &sdp->sd_lockstruct; + int lvb_needs_unlock = 0; int error; if (gl->gl_lksb.sb_lkid == 0) { @@ -289,6 +293,18 @@ static void gdlm_put_lock(struct gfs2_glock *gl) gfs2_glstats_inc(gl, GFS2_LKS_DCOUNT); gfs2_sbstats_inc(gl, GFS2_LKS_DCOUNT); gfs2_update_request_times(gl); + + /* don't want to skip dlm_unlock writing the lvb when lock is ex */ + + if (gl->gl_lksb.sb_lvbptr && (gl->gl_state == LM_ST_EXCLUSIVE)) + lvb_needs_unlock = 1; + + if (test_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags) && + !lvb_needs_unlock) { + gfs2_glock_free(gl); + return; + } + error = dlm_unlock(ls->ls_dlm, gl->gl_lksb.sb_lkid, DLM_LKF_VALBLK, NULL, gl); if (error) { diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index 8ff95a2d54e..9ceccb1595a 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -393,12 +393,10 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) struct gfs2_meta_header *mh; struct gfs2_trans *tr; - lock_buffer(bd->bd_bh); - gfs2_log_lock(sdp); tr = current->journal_info; tr->tr_touched = 1; if (!list_empty(&bd->bd_list)) - goto out; + return; set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); mh = (struct gfs2_meta_header *)bd->bd_bh->b_data; @@ -414,9 +412,6 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) sdp->sd_log_num_buf++; list_add(&bd->bd_list, &sdp->sd_log_le_buf); tr->tr_num_buf_new++; -out: - gfs2_log_unlock(sdp); - unlock_buffer(bd->bd_bh); } static void gfs2_check_magic(struct buffer_head *bh) @@ -621,7 +616,6 @@ static void revoke_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) static void revoke_lo_before_commit(struct gfs2_sbd *sdp) { - struct gfs2_log_descriptor *ld; struct gfs2_meta_header *mh; unsigned int offset; struct list_head *head = &sdp->sd_log_le_revoke; @@ -634,7 +628,6 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp) length = gfs2_struct2blk(sdp, sdp->sd_log_num_revoke, sizeof(u64)); page = gfs2_get_log_desc(sdp, GFS2_LOG_DESC_REVOKE, length, sdp->sd_log_num_revoke); - ld = page_address(page); offset = sizeof(struct gfs2_log_descriptor); list_for_each_entry(bd, head, bd_list) { @@ -777,12 +770,10 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) struct address_space *mapping = bd->bd_bh->b_page->mapping; struct gfs2_inode *ip = GFS2_I(mapping->host); - lock_buffer(bd->bd_bh); - gfs2_log_lock(sdp); if (tr) tr->tr_touched = 1; if (!list_empty(&bd->bd_list)) - goto out; + return; set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags); set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags); if (gfs2_is_jdata(ip)) { @@ -793,9 +784,6 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) } else { list_add_tail(&bd->bd_list, &sdp->sd_log_le_ordered); } -out: - gfs2_log_unlock(sdp); - unlock_buffer(bd->bd_bh); } /** diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index e443966c810..0e3554edb8f 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -278,6 +278,9 @@ static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent) sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(struct gfs2_quota_change); + sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize - + sizeof(struct gfs2_meta_header)) + * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */ /* Compute maximum reservation required to add a entry to a directory */ diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 40c4b0d42fa..ae55e248c3b 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -497,8 +497,11 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid) struct gfs2_quota_data **qd; int error; - if (ip->i_res == NULL) - gfs2_rs_alloc(ip); + if (ip->i_res == NULL) { + error = gfs2_rs_alloc(ip); + if (error) + return error; + } qd = ip->i_res->rs_qa_qd; @@ -813,7 +816,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; reserved = 1 + (nalloc * (data_blocks + ind_blocks)); - error = gfs2_inplace_reserve(ip, reserved); + error = gfs2_inplace_reserve(ip, reserved, 0); if (error) goto out_alloc; @@ -866,7 +869,7 @@ static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) if (error < 0) return error; - qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; + qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); qlvb->__pad = 0; qlvb->qb_limit = q.qu_limit; @@ -890,7 +893,7 @@ restart: if (error) return error; - qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; + qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { gfs2_glock_dq_uninit(q_gh); @@ -1503,7 +1506,7 @@ static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, if (error) goto out; - qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; + qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; fdq->d_version = FS_DQUOT_VERSION; fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA; fdq->d_id = from_kqid(&init_user_ns, qid); @@ -1602,7 +1605,7 @@ static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), &data_blocks, &ind_blocks); blocks = 1 + data_blocks + ind_blocks; - error = gfs2_inplace_reserve(ip, blocks); + error = gfs2_inplace_reserve(ip, blocks, 0); if (error) goto out_i; blocks += gfs2_rg_blocks(ip, blocks); diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 3cc402ce6fe..b7eff078fe9 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -16,6 +16,7 @@ #include <linux/prefetch.h> #include <linux/blkdev.h> #include <linux/rbtree.h> +#include <linux/random.h> #include "gfs2.h" #include "incore.h" @@ -251,22 +252,25 @@ static u32 gfs2_bitfit(const u8 *buf, const unsigned int len, static int gfs2_rbm_from_block(struct gfs2_rbm *rbm, u64 block) { u64 rblock = block - rbm->rgd->rd_data0; - u32 goal = (u32)rblock; - int x; + u32 x; if (WARN_ON_ONCE(rblock > UINT_MAX)) return -EINVAL; if (block >= rbm->rgd->rd_data0 + rbm->rgd->rd_data) return -E2BIG; - for (x = 0; x < rbm->rgd->rd_length; x++) { - rbm->bi = rbm->rgd->rd_bits + x; - if (goal < (rbm->bi->bi_start + rbm->bi->bi_len) * GFS2_NBBY) { - rbm->offset = goal - (rbm->bi->bi_start * GFS2_NBBY); - break; - } - } + rbm->bi = rbm->rgd->rd_bits; + rbm->offset = (u32)(rblock); + /* Check if the block is within the first block */ + if (rbm->offset < (rbm->bi->bi_start + rbm->bi->bi_len) * GFS2_NBBY) + return 0; + /* Adjust for the size diff between gfs2_meta_header and gfs2_rgrp */ + rbm->offset += (sizeof(struct gfs2_rgrp) - + sizeof(struct gfs2_meta_header)) * GFS2_NBBY; + x = rbm->offset / rbm->rgd->rd_sbd->sd_blocks_per_bitmap; + rbm->offset -= x * rbm->rgd->rd_sbd->sd_blocks_per_bitmap; + rbm->bi += x; return 0; } @@ -346,10 +350,14 @@ static u32 gfs2_free_extlen(const struct gfs2_rbm *rrbm, u32 len) BUG_ON(len < chunk_size); len -= chunk_size; block = gfs2_rbm_to_block(&rbm); - gfs2_rbm_from_block(&rbm, block + chunk_size); - n_unaligned = 3; - if (ptr) + if (gfs2_rbm_from_block(&rbm, block + chunk_size)) { + n_unaligned = 0; + break; + } + if (ptr) { + n_unaligned = 3; break; + } n_unaligned = len & 3; } @@ -554,24 +562,21 @@ void gfs2_free_clones(struct gfs2_rgrpd *rgd) int gfs2_rs_alloc(struct gfs2_inode *ip) { int error = 0; - struct gfs2_blkreserv *res; + down_write(&ip->i_rw_mutex); if (ip->i_res) - return 0; + goto out; - res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS); - if (!res) + ip->i_res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS); + if (!ip->i_res) { error = -ENOMEM; + goto out; + } - RB_CLEAR_NODE(&res->rs_node); - - down_write(&ip->i_rw_mutex); - if (ip->i_res) - kmem_cache_free(gfs2_rsrv_cachep, res); - else - ip->i_res = res; + RB_CLEAR_NODE(&ip->i_res->rs_node); +out: up_write(&ip->i_rw_mutex); - return error; + return 0; } static void dump_rs(struct seq_file *seq, const struct gfs2_blkreserv *rs) @@ -876,7 +881,7 @@ static int read_rindex_entry(struct gfs2_inode *ip) goto fail; rgd->rd_gl->gl_object = rgd; - rgd->rd_rgl = (struct gfs2_rgrp_lvb *)rgd->rd_gl->gl_lvb; + rgd->rd_rgl = (struct gfs2_rgrp_lvb *)rgd->rd_gl->gl_lksb.sb_lvbptr; rgd->rd_flags &= ~GFS2_RDF_UPTODATE; if (rgd->rd_data > sdp->sd_max_rg_data) sdp->sd_max_rg_data = rgd->rd_data; @@ -1263,7 +1268,9 @@ int gfs2_fitrim(struct file *filp, void __user *argp) int ret = 0; u64 amt; u64 trimmed = 0; + u64 start, end, minlen; unsigned int x; + unsigned bs_shift = sdp->sd_sb.sb_bsize_shift; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -1271,19 +1278,25 @@ int gfs2_fitrim(struct file *filp, void __user *argp) if (!blk_queue_discard(q)) return -EOPNOTSUPP; - if (argp == NULL) { - r.start = 0; - r.len = ULLONG_MAX; - r.minlen = 0; - } else if (copy_from_user(&r, argp, sizeof(r))) + if (copy_from_user(&r, argp, sizeof(r))) return -EFAULT; ret = gfs2_rindex_update(sdp); if (ret) return ret; - rgd = gfs2_blk2rgrpd(sdp, r.start, 0); - rgd_end = gfs2_blk2rgrpd(sdp, r.start + r.len, 0); + start = r.start >> bs_shift; + end = start + (r.len >> bs_shift); + minlen = max_t(u64, r.minlen, + q->limits.discard_granularity) >> bs_shift; + + rgd = gfs2_blk2rgrpd(sdp, start, 0); + rgd_end = gfs2_blk2rgrpd(sdp, end - 1, 0); + + if (end <= start || + minlen > sdp->sd_max_rg_data || + start > rgd_end->rd_data0 + rgd_end->rd_data) + return -EINVAL; while (1) { @@ -1295,7 +1308,9 @@ int gfs2_fitrim(struct file *filp, void __user *argp) /* Trim each bitmap in the rgrp */ for (x = 0; x < rgd->rd_length; x++) { struct gfs2_bitmap *bi = rgd->rd_bits + x; - ret = gfs2_rgrp_send_discards(sdp, rgd->rd_data0, NULL, bi, r.minlen, &amt); + ret = gfs2_rgrp_send_discards(sdp, + rgd->rd_data0, NULL, bi, minlen, + &amt); if (ret) { gfs2_glock_dq_uninit(&gh); goto out; @@ -1324,7 +1339,7 @@ int gfs2_fitrim(struct file *filp, void __user *argp) out: r.len = trimmed << 9; - if (argp && copy_to_user(argp, &r, sizeof(r))) + if (copy_to_user(argp, &r, sizeof(r))) return -EFAULT; return ret; @@ -1411,6 +1426,9 @@ static void rg_mblk_search(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip, rs->rs_free = extlen; rs->rs_inum = ip->i_no_addr; rs_insert(ip); + } else { + if (goal == rgd->rd_last_alloc + rgd->rd_data0) + rgd->rd_last_alloc = 0; } } @@ -1669,13 +1687,105 @@ static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip return; } +/** + * gfs2_rgrp_congested - Use stats to figure out whether an rgrp is congested + * @rgd: The rgrp in question + * @loops: An indication of how picky we can be (0=very, 1=less so) + * + * This function uses the recently added glock statistics in order to + * figure out whether a parciular resource group is suffering from + * contention from multiple nodes. This is done purely on the basis + * of timings, since this is the only data we have to work with and + * our aim here is to reject a resource group which is highly contended + * but (very important) not to do this too often in order to ensure that + * we do not land up introducing fragmentation by changing resource + * groups when not actually required. + * + * The calculation is fairly simple, we want to know whether the SRTTB + * (i.e. smoothed round trip time for blocking operations) to acquire + * the lock for this rgrp's glock is significantly greater than the + * time taken for resource groups on average. We introduce a margin in + * the form of the variable @var which is computed as the sum of the two + * respective variences, and multiplied by a factor depending on @loops + * and whether we have a lot of data to base the decision on. This is + * then tested against the square difference of the means in order to + * decide whether the result is statistically significant or not. + * + * Returns: A boolean verdict on the congestion status + */ + +static bool gfs2_rgrp_congested(const struct gfs2_rgrpd *rgd, int loops) +{ + const struct gfs2_glock *gl = rgd->rd_gl; + const struct gfs2_sbd *sdp = gl->gl_sbd; + struct gfs2_lkstats *st; + s64 r_dcount, l_dcount; + s64 r_srttb, l_srttb; + s64 srttb_diff; + s64 sqr_diff; + s64 var; + + preempt_disable(); + st = &this_cpu_ptr(sdp->sd_lkstats)->lkstats[LM_TYPE_RGRP]; + r_srttb = st->stats[GFS2_LKS_SRTTB]; + r_dcount = st->stats[GFS2_LKS_DCOUNT]; + var = st->stats[GFS2_LKS_SRTTVARB] + + gl->gl_stats.stats[GFS2_LKS_SRTTVARB]; + preempt_enable(); + + l_srttb = gl->gl_stats.stats[GFS2_LKS_SRTTB]; + l_dcount = gl->gl_stats.stats[GFS2_LKS_DCOUNT]; + + if ((l_dcount < 1) || (r_dcount < 1) || (r_srttb == 0)) + return false; + + srttb_diff = r_srttb - l_srttb; + sqr_diff = srttb_diff * srttb_diff; + + var *= 2; + if (l_dcount < 8 || r_dcount < 8) + var *= 2; + if (loops == 1) + var *= 2; + + return ((srttb_diff < 0) && (sqr_diff > var)); +} + +/** + * gfs2_rgrp_used_recently + * @rs: The block reservation with the rgrp to test + * @msecs: The time limit in milliseconds + * + * Returns: True if the rgrp glock has been used within the time limit + */ +static bool gfs2_rgrp_used_recently(const struct gfs2_blkreserv *rs, + u64 msecs) +{ + u64 tdiff; + + tdiff = ktime_to_ns(ktime_sub(ktime_get_real(), + rs->rs_rbm.rgd->rd_gl->gl_dstamp)); + + return tdiff > (msecs * 1000 * 1000); +} + +static u32 gfs2_orlov_skip(const struct gfs2_inode *ip) +{ + const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + u32 skip; + + get_random_bytes(&skip, sizeof(skip)); + return skip % sdp->sd_rgrps; +} + static bool gfs2_select_rgrp(struct gfs2_rgrpd **pos, const struct gfs2_rgrpd *begin) { struct gfs2_rgrpd *rgd = *pos; + struct gfs2_sbd *sdp = rgd->rd_sbd; rgd = gfs2_rgrpd_get_next(rgd); if (rgd == NULL) - rgd = gfs2_rgrpd_get_next(NULL); + rgd = gfs2_rgrpd_get_first(sdp); *pos = rgd; if (rgd != begin) /* If we didn't wrap */ return true; @@ -1690,14 +1800,15 @@ static bool gfs2_select_rgrp(struct gfs2_rgrpd **pos, const struct gfs2_rgrpd *b * Returns: errno */ -int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested) +int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested, u32 aflags) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_rgrpd *begin = NULL; struct gfs2_blkreserv *rs = ip->i_res; - int error = 0, rg_locked, flags = LM_FLAG_TRY; + int error = 0, rg_locked, flags = 0; u64 last_unlinked = NO_BLOCK; int loops = 0; + u32 skip = 0; if (sdp->sd_args.ar_rgrplvb) flags |= GL_SKIP; @@ -1711,6 +1822,8 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested) } else { rs->rs_rbm.rgd = begin = gfs2_blk2rgrpd(sdp, ip->i_goal, 1); } + if (S_ISDIR(ip->i_inode.i_mode) && (aflags & GFS2_AF_ORLOV)) + skip = gfs2_orlov_skip(ip); if (rs->rs_rbm.rgd == NULL) return -EBADSLT; @@ -1719,13 +1832,20 @@ int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested) if (!gfs2_glock_is_locked_by_me(rs->rs_rbm.rgd->rd_gl)) { rg_locked = 0; + if (skip && skip--) + goto next_rgrp; + if (!gfs2_rs_active(rs) && (loops < 2) && + gfs2_rgrp_used_recently(rs, 1000) && + gfs2_rgrp_congested(rs->rs_rbm.rgd, loops)) + goto next_rgrp; error = gfs2_glock_nq_init(rs->rs_rbm.rgd->rd_gl, LM_ST_EXCLUSIVE, flags, &rs->rs_rgd_gh); - if (error == GLR_TRYFAILED) - goto next_rgrp; if (unlikely(error)) return error; + if (!gfs2_rs_active(rs) && (loops < 2) && + gfs2_rgrp_congested(rs->rs_rbm.rgd, loops)) + goto skip_rgrp; if (sdp->sd_args.ar_rgrplvb) { error = update_rgrp_lvb(rs->rs_rbm.rgd); if (unlikely(error)) { @@ -1772,12 +1892,13 @@ next_rgrp: /* Find the next rgrp, and continue looking */ if (gfs2_select_rgrp(&rs->rs_rbm.rgd, begin)) continue; + if (skip) + continue; /* If we've scanned all the rgrps, but found no free blocks * then this checks for some less likely conditions before * trying again. */ - flags &= ~LM_FLAG_TRY; loops++; /* Check that fs hasn't grown if writing to rindex */ if (ip == GFS2_I(sdp->sd_rindex) && !sdp->sd_rindex_uptodate) { diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h index 24077958dcf..842185853f6 100644 --- a/fs/gfs2/rgrp.h +++ b/fs/gfs2/rgrp.h @@ -39,7 +39,8 @@ extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh); extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip); -extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested); +#define GFS2_AF_ORLOV 1 +extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested, u32 flags); extern void gfs2_inplace_release(struct gfs2_inode *ip); extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index bc737261f23..d6488674d91 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -810,7 +810,8 @@ static void gfs2_dirty_inode(struct inode *inode, int flags) return; } need_unlock = 1; - } + } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) + return; if (current->journal_info == NULL) { ret = gfs2_trans_begin(sdp, RES_DINODE, 0); diff --git a/fs/gfs2/trace_gfs2.h b/fs/gfs2/trace_gfs2.h index bbdc78af60c..2ee13e841e9 100644 --- a/fs/gfs2/trace_gfs2.h +++ b/fs/gfs2/trace_gfs2.h @@ -486,7 +486,7 @@ TRACE_EVENT(gfs2_block_alloc, ), TP_fast_assign( - __entry->dev = ip->i_gl->gl_sbd->sd_vfs->s_dev; + __entry->dev = rgd->rd_gl->gl_sbd->sd_vfs->s_dev; __entry->start = block; __entry->inum = ip->i_no_addr; __entry->len = len; diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c index adbd27875ef..413627072f3 100644 --- a/fs/gfs2/trans.c +++ b/fs/gfs2/trans.c @@ -155,14 +155,22 @@ void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta) struct gfs2_sbd *sdp = gl->gl_sbd; struct gfs2_bufdata *bd; + lock_buffer(bh); + gfs2_log_lock(sdp); bd = bh->b_private; if (bd) gfs2_assert(sdp, bd->bd_gl == gl); else { + gfs2_log_unlock(sdp); + unlock_buffer(bh); gfs2_attach_bufdata(gl, bh, meta); bd = bh->b_private; + lock_buffer(bh); + gfs2_log_lock(sdp); } lops_add(sdp, bd); + gfs2_log_unlock(sdp); + unlock_buffer(bh); } void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c index db330e5518c..76c144b3c9b 100644 --- a/fs/gfs2/xattr.c +++ b/fs/gfs2/xattr.c @@ -734,7 +734,7 @@ static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, if (error) return error; - error = gfs2_inplace_reserve(ip, blks); + error = gfs2_inplace_reserve(ip, blks, 0); if (error) goto out_gunlock_q; diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c index 0b35903219b..d47f11658c1 100644 --- a/fs/hfs/inode.c +++ b/fs/hfs/inode.c @@ -35,6 +35,16 @@ static int hfs_readpage(struct file *file, struct page *page) return block_read_full_page(page, hfs_get_block); } +static void hfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + hfs_file_truncate(inode); + } +} + static int hfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -45,11 +55,8 @@ static int hfs_write_begin(struct file *file, struct address_space *mapping, ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, hfs_get_block, &HFS_I(mapping->host)->phys_size); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + hfs_write_failed(mapping, pos + len); return ret; } @@ -120,6 +127,7 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) { struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host; ssize_t ret; @@ -135,7 +143,7 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb, loff_t end = offset + iov_length(iov, nr_segs); if (end > isize) - vmtruncate(inode, isize); + hfs_write_failed(mapping, end); } return ret; @@ -617,9 +625,12 @@ int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr) attr->ia_size != i_size_read(inode)) { inode_dio_wait(inode); - error = vmtruncate(inode, attr->ia_size); + error = inode_newsize_ok(inode, attr->ia_size); if (error) return error; + + truncate_setsize(inode, attr->ia_size); + hfs_file_truncate(inode); } setattr_copy(inode, attr); @@ -668,7 +679,6 @@ static const struct file_operations hfs_file_operations = { static const struct inode_operations hfs_file_inode_operations = { .lookup = hfs_file_lookup, - .truncate = hfs_file_truncate, .setattr = hfs_inode_setattr, .setxattr = hfs_setxattr, .getxattr = hfs_getxattr, diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c index 4cfbe2edd29..6feefc0cb48 100644 --- a/fs/hfsplus/bitmap.c +++ b/fs/hfsplus/bitmap.c @@ -176,12 +176,14 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count) dprint(DBG_BITMAP, "block_free: %u,%u\n", offset, count); /* are all of the bits in range? */ if ((offset + count) > sbi->total_blocks) - return -2; + return -ENOENT; mutex_lock(&sbi->alloc_mutex); mapping = sbi->alloc_file->i_mapping; pnr = offset / PAGE_CACHE_BITS; page = read_mapping_page(mapping, pnr, NULL); + if (IS_ERR(page)) + goto kaboom; pptr = kmap(page); curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32; end = pptr + PAGE_CACHE_BITS / 32; @@ -214,6 +216,8 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count) set_page_dirty(page); kunmap(page); page = read_mapping_page(mapping, ++pnr, NULL); + if (IS_ERR(page)) + goto kaboom; pptr = kmap(page); curr = pptr; end = pptr + PAGE_CACHE_BITS / 32; @@ -232,4 +236,11 @@ out: mutex_unlock(&sbi->alloc_mutex); return 0; + +kaboom: + printk(KERN_CRIT "hfsplus: unable to mark blocks free: error %ld\n", + PTR_ERR(page)); + mutex_unlock(&sbi->alloc_mutex); + + return -EIO; } diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c index 21023d9f8ff..685d07d0ed1 100644 --- a/fs/hfsplus/btree.c +++ b/fs/hfsplus/btree.c @@ -159,7 +159,7 @@ void hfs_btree_close(struct hfs_btree *tree) kfree(tree); } -void hfs_btree_write(struct hfs_btree *tree) +int hfs_btree_write(struct hfs_btree *tree) { struct hfs_btree_header_rec *head; struct hfs_bnode *node; @@ -168,7 +168,7 @@ void hfs_btree_write(struct hfs_btree *tree) node = hfs_bnode_find(tree, 0); if (IS_ERR(node)) /* panic? */ - return; + return -EIO; /* Load the header */ page = node->page[0]; head = (struct hfs_btree_header_rec *)(kmap(page) + @@ -186,6 +186,7 @@ void hfs_btree_write(struct hfs_btree *tree) kunmap(page); set_page_dirty(page); hfs_bnode_put(node); + return 0; } static struct hfs_bnode *hfs_bmap_new_bmap(struct hfs_bnode *prev, u32 idx) diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c index 5849e3ef35c..eba76eab6d6 100644 --- a/fs/hfsplus/extents.c +++ b/fs/hfsplus/extents.c @@ -329,6 +329,7 @@ static int hfsplus_free_extents(struct super_block *sb, { u32 count, start; int i; + int err = 0; hfsplus_dump_extent(extent); for (i = 0; i < 8; extent++, i++) { @@ -345,18 +346,33 @@ found: for (;;) { start = be32_to_cpu(extent->start_block); if (count <= block_nr) { - hfsplus_block_free(sb, start, count); + err = hfsplus_block_free(sb, start, count); + if (err) { + printk(KERN_ERR "hfs: can't free extent\n"); + dprint(DBG_EXTENT, " start: %u count: %u\n", + start, count); + } extent->block_count = 0; extent->start_block = 0; block_nr -= count; } else { count -= block_nr; - hfsplus_block_free(sb, start + count, block_nr); + err = hfsplus_block_free(sb, start + count, block_nr); + if (err) { + printk(KERN_ERR "hfs: can't free extent\n"); + dprint(DBG_EXTENT, " start: %u count: %u\n", + start, count); + } extent->block_count = cpu_to_be32(count); block_nr = 0; } - if (!block_nr || !i) - return 0; + if (!block_nr || !i) { + /* + * Try to free all extents and + * return only last error + */ + return err; + } i--; extent--; count = be32_to_cpu(extent->block_count); diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h index c571de224b1..a6da86b1b4c 100644 --- a/fs/hfsplus/hfsplus_fs.h +++ b/fs/hfsplus/hfsplus_fs.h @@ -335,7 +335,7 @@ int hfsplus_block_free(struct super_block *, u32, u32); /* btree.c */ struct hfs_btree *hfs_btree_open(struct super_block *, u32); void hfs_btree_close(struct hfs_btree *); -void hfs_btree_write(struct hfs_btree *); +int hfs_btree_write(struct hfs_btree *); struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *); void hfs_bmap_free(struct hfs_bnode *); diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c index 2172aa5976f..799b336b59f 100644 --- a/fs/hfsplus/inode.c +++ b/fs/hfsplus/inode.c @@ -28,6 +28,16 @@ static int hfsplus_writepage(struct page *page, struct writeback_control *wbc) return block_write_full_page(page, hfsplus_get_block, wbc); } +static void hfsplus_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + hfsplus_file_truncate(inode); + } +} + static int hfsplus_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -38,11 +48,8 @@ static int hfsplus_write_begin(struct file *file, struct address_space *mapping, ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, hfsplus_get_block, &HFSPLUS_I(mapping->host)->phys_size); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + hfsplus_write_failed(mapping, pos + len); return ret; } @@ -116,6 +123,7 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) { struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host; ssize_t ret; @@ -131,7 +139,7 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb, loff_t end = offset + iov_length(iov, nr_segs); if (end > isize) - vmtruncate(inode, isize); + hfsplus_write_failed(mapping, end); } return ret; @@ -300,10 +308,8 @@ static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr) if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size != i_size_read(inode)) { inode_dio_wait(inode); - - error = vmtruncate(inode, attr->ia_size); - if (error) - return error; + truncate_setsize(inode, attr->ia_size); + hfsplus_file_truncate(inode); } setattr_copy(inode, attr); @@ -358,7 +364,6 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, static const struct inode_operations hfsplus_file_inode_operations = { .lookup = hfsplus_file_lookup, - .truncate = hfsplus_file_truncate, .setattr = hfsplus_setattr, .setxattr = hfsplus_setxattr, .getxattr = hfsplus_getxattr, diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c index 811a84d2d96..796198d2655 100644 --- a/fs/hfsplus/super.c +++ b/fs/hfsplus/super.c @@ -127,8 +127,14 @@ static int hfsplus_system_write_inode(struct inode *inode) hfsplus_mark_mdb_dirty(inode->i_sb); } hfsplus_inode_write_fork(inode, fork); - if (tree) - hfs_btree_write(tree); + if (tree) { + int err = hfs_btree_write(tree); + if (err) { + printk(KERN_ERR "hfs: b-tree write err: %d, ino %lu\n", + err, inode->i_ino); + return err; + } + } return 0; } @@ -226,6 +232,7 @@ out: static void delayed_sync_fs(struct work_struct *work) { + int err; struct hfsplus_sb_info *sbi; sbi = container_of(work, struct hfsplus_sb_info, sync_work.work); @@ -234,7 +241,9 @@ static void delayed_sync_fs(struct work_struct *work) sbi->work_queued = 0; spin_unlock(&sbi->work_lock); - hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); + err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); + if (err) + printk(KERN_ERR "hfs: delayed sync fs err %d\n", err); } void hfsplus_mark_mdb_dirty(struct super_block *sb) diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c index 89d2a5803ae..fbfe2df5624 100644 --- a/fs/hpfs/file.c +++ b/fs/hpfs/file.c @@ -50,7 +50,7 @@ static secno hpfs_bmap(struct inode *inode, unsigned file_secno) return disk_secno; } -static void hpfs_truncate(struct inode *i) +void hpfs_truncate(struct inode *i) { if (IS_IMMUTABLE(i)) return /*-EPERM*/; hpfs_lock_assert(i->i_sb); @@ -105,6 +105,16 @@ static int hpfs_readpage(struct file *file, struct page *page) return block_read_full_page(page,hpfs_get_block); } +static void hpfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + hpfs_truncate(inode); + } +} + static int hpfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -115,11 +125,8 @@ static int hpfs_write_begin(struct file *file, struct address_space *mapping, ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, hpfs_get_block, &hpfs_i(mapping->host)->mmu_private); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + hpfs_write_failed(mapping, pos + len); return ret; } @@ -166,6 +173,5 @@ const struct file_operations hpfs_file_ops = const struct inode_operations hpfs_file_iops = { - .truncate = hpfs_truncate, .setattr = hpfs_setattr, }; diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h index 7102aaecc24..b7ae286646b 100644 --- a/fs/hpfs/hpfs_fn.h +++ b/fs/hpfs/hpfs_fn.h @@ -252,6 +252,7 @@ void hpfs_set_ea(struct inode *, struct fnode *, const char *, /* file.c */ int hpfs_file_fsync(struct file *, loff_t, loff_t, int); +void hpfs_truncate(struct inode *); extern const struct file_operations hpfs_file_ops; extern const struct inode_operations hpfs_file_iops; extern const struct address_space_operations hpfs_aops; diff --git a/fs/hpfs/inode.c b/fs/hpfs/inode.c index 405ab77db39..9edeeb0ea97 100644 --- a/fs/hpfs/inode.c +++ b/fs/hpfs/inode.c @@ -277,9 +277,12 @@ int hpfs_setattr(struct dentry *dentry, struct iattr *attr) if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, attr->ia_size); + error = inode_newsize_ok(inode, attr->ia_size); if (error) goto out_unlock; + + truncate_setsize(inode, attr->ia_size); + hpfs_truncate(inode); } setattr_copy(inode, attr); diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c index 78f21f8dc2e..43b315f2002 100644 --- a/fs/hppfs/hppfs.c +++ b/fs/hppfs/hppfs.c @@ -710,7 +710,7 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent) struct vfsmount *proc_mnt; int err = -ENOENT; - proc_mnt = mntget(current->nsproxy->pid_ns->proc_mnt); + proc_mnt = mntget(task_active_pid_ns(current)->proc_mnt); if (IS_ERR(proc_mnt)) goto out; diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index c98d0665fa5..78bde32ea95 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -151,8 +151,8 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, { struct mm_struct *mm = current->mm; struct vm_area_struct *vma; - unsigned long start_addr; struct hstate *h = hstate_file(file); + struct vm_unmapped_area_info info; if (len & ~huge_page_mask(h)) return -EINVAL; @@ -173,39 +173,13 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, return addr; } - if (len > mm->cached_hole_size) - start_addr = mm->free_area_cache; - else { - start_addr = TASK_UNMAPPED_BASE; - mm->cached_hole_size = 0; - } - -full_search: - addr = ALIGN(start_addr, huge_page_size(h)); - - for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { - /* At this point: (!vma || addr < vma->vm_end). */ - if (TASK_SIZE - len < addr) { - /* - * Start a new search - just in case we missed - * some holes. - */ - if (start_addr != TASK_UNMAPPED_BASE) { - start_addr = TASK_UNMAPPED_BASE; - mm->cached_hole_size = 0; - goto full_search; - } - return -ENOMEM; - } - - if (!vma || addr + len <= vma->vm_start) { - mm->free_area_cache = addr + len; - return addr; - } - if (addr + mm->cached_hole_size < vma->vm_start) - mm->cached_hole_size = vma->vm_start - addr; - addr = ALIGN(vma->vm_end, huge_page_size(h)); - } + info.flags = 0; + info.length = len; + info.low_limit = TASK_UNMAPPED_BASE; + info.high_limit = TASK_SIZE; + info.align_mask = PAGE_MASK & ~huge_page_mask(h); + info.align_offset = 0; + return vm_unmapped_area(&info); } #endif @@ -608,11 +582,11 @@ static int hugetlbfs_migrate_page(struct address_space *mapping, int rc; rc = migrate_huge_page_move_mapping(mapping, newpage, page); - if (rc) + if (rc != MIGRATEPAGE_SUCCESS) return rc; migrate_page_copy(newpage, page); - return 0; + return MIGRATEPAGE_SUCCESS; } static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf) @@ -923,7 +897,7 @@ static struct file_system_type hugetlbfs_fs_type = { .kill_sb = kill_litter_super, }; -static struct vfsmount *hugetlbfs_vfsmount; +static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE]; static int can_do_hugetlb_shm(void) { @@ -932,9 +906,22 @@ static int can_do_hugetlb_shm(void) return capable(CAP_IPC_LOCK) || in_group_p(shm_group); } +static int get_hstate_idx(int page_size_log) +{ + struct hstate *h; + + if (!page_size_log) + return default_hstate_idx; + h = size_to_hstate(1 << page_size_log); + if (!h) + return -1; + return h - hstates; +} + struct file *hugetlb_file_setup(const char *name, unsigned long addr, size_t size, vm_flags_t acctflag, - struct user_struct **user, int creat_flags) + struct user_struct **user, + int creat_flags, int page_size_log) { int error = -ENOMEM; struct file *file; @@ -944,9 +931,14 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr, struct qstr quick_string; struct hstate *hstate; unsigned long num_pages; + int hstate_idx; + + hstate_idx = get_hstate_idx(page_size_log); + if (hstate_idx < 0) + return ERR_PTR(-ENODEV); *user = NULL; - if (!hugetlbfs_vfsmount) + if (!hugetlbfs_vfsmount[hstate_idx]) return ERR_PTR(-ENOENT); if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) { @@ -963,7 +955,7 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr, } } - root = hugetlbfs_vfsmount->mnt_root; + root = hugetlbfs_vfsmount[hstate_idx]->mnt_root; quick_string.name = name; quick_string.len = strlen(quick_string.name); quick_string.hash = 0; @@ -971,7 +963,7 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr, if (!path.dentry) goto out_shm_unlock; - path.mnt = mntget(hugetlbfs_vfsmount); + path.mnt = mntget(hugetlbfs_vfsmount[hstate_idx]); error = -ENOSPC; inode = hugetlbfs_get_inode(root->d_sb, NULL, S_IFREG | S_IRWXUGO, 0); if (!inode) @@ -1011,8 +1003,9 @@ out_shm_unlock: static int __init init_hugetlbfs_fs(void) { + struct hstate *h; int error; - struct vfsmount *vfsmount; + int i; error = bdi_init(&hugetlbfs_backing_dev_info); if (error) @@ -1029,14 +1022,26 @@ static int __init init_hugetlbfs_fs(void) if (error) goto out; - vfsmount = kern_mount(&hugetlbfs_fs_type); + i = 0; + for_each_hstate(h) { + char buf[50]; + unsigned ps_kb = 1U << (h->order + PAGE_SHIFT - 10); - if (!IS_ERR(vfsmount)) { - hugetlbfs_vfsmount = vfsmount; - return 0; - } + snprintf(buf, sizeof(buf), "pagesize=%uK", ps_kb); + hugetlbfs_vfsmount[i] = kern_mount_data(&hugetlbfs_fs_type, + buf); - error = PTR_ERR(vfsmount); + if (IS_ERR(hugetlbfs_vfsmount[i])) { + pr_err("hugetlb: Cannot mount internal hugetlbfs for " + "page size %uK", ps_kb); + error = PTR_ERR(hugetlbfs_vfsmount[i]); + hugetlbfs_vfsmount[i] = NULL; + } + i++; + } + /* Non default hstates are optional */ + if (!IS_ERR_OR_NULL(hugetlbfs_vfsmount[default_hstate_idx])) + return 0; out: kmem_cache_destroy(hugetlbfs_inode_cachep); @@ -1047,13 +1052,19 @@ static int __init init_hugetlbfs_fs(void) static void __exit exit_hugetlbfs_fs(void) { + struct hstate *h; + int i; + + /* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); kmem_cache_destroy(hugetlbfs_inode_cachep); - kern_unmount(hugetlbfs_vfsmount); + i = 0; + for_each_hstate(h) + kern_unmount(hugetlbfs_vfsmount[i++]); unregister_filesystem(&hugetlbfs_fs_type); bdi_destroy(&hugetlbfs_backing_dev_info); } diff --git a/fs/inode.c b/fs/inode.c index b03c7195724..14084b72b25 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -165,7 +165,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode) mapping->host = inode; mapping->flags = 0; mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE); - mapping->assoc_mapping = NULL; + mapping->private_data = NULL; mapping->backing_dev_info = &default_backing_dev_info; mapping->writeback_index = 0; @@ -408,6 +408,19 @@ static void inode_lru_list_add(struct inode *inode) spin_unlock(&inode->i_sb->s_inode_lru_lock); } +/* + * Add inode to LRU if needed (inode is unused and clean). + * + * Needs inode->i_lock held. + */ +void inode_add_lru(struct inode *inode) +{ + if (!(inode->i_state & (I_DIRTY | I_SYNC | I_FREEING | I_WILL_FREE)) && + !atomic_read(&inode->i_count) && inode->i_sb->s_flags & MS_ACTIVE) + inode_lru_list_add(inode); +} + + static void inode_lru_list_del(struct inode *inode) { spin_lock(&inode->i_sb->s_inode_lru_lock); @@ -1390,8 +1403,7 @@ static void iput_final(struct inode *inode) if (!drop && (sb->s_flags & MS_ACTIVE)) { inode->i_state |= I_REFERENCED; - if (!(inode->i_state & (I_DIRTY|I_SYNC))) - inode_lru_list_add(inode); + inode_add_lru(inode); spin_unlock(&inode->i_lock); return; } diff --git a/fs/internal.h b/fs/internal.h index 916b7cbf3e3..2f6af7f645e 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -110,6 +110,7 @@ extern int open_check_o_direct(struct file *f); * inode.c */ extern spinlock_t inode_sb_list_lock; +extern void inode_add_lru(struct inode *inode); /* * fs-writeback.c diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c index a2862339323..81cc7eaff86 100644 --- a/fs/jbd/journal.c +++ b/fs/jbd/journal.c @@ -446,7 +446,8 @@ int __log_start_commit(journal_t *journal, tid_t target) * currently running transaction (if it exists). Otherwise, * the target tid must be an old one. */ - if (journal->j_running_transaction && + if (journal->j_commit_request != target && + journal->j_running_transaction && journal->j_running_transaction->t_tid == target) { /* * We want a new commit: OK, mark the request and wakeup the diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c index 8b472c8bbf7..071d6905f0d 100644 --- a/fs/jbd/transaction.c +++ b/fs/jbd/transaction.c @@ -1961,7 +1961,9 @@ retry: spin_unlock(&journal->j_list_lock); jbd_unlock_bh_state(bh); spin_unlock(&journal->j_state_lock); + unlock_buffer(bh); log_wait_commit(journal, tid); + lock_buffer(bh); goto retry; } /* diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 484b8d1c6cb..dbf41f9452d 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -60,7 +60,6 @@ EXPORT_SYMBOL(jbd2_journal_get_create_access); EXPORT_SYMBOL(jbd2_journal_get_undo_access); EXPORT_SYMBOL(jbd2_journal_set_triggers); EXPORT_SYMBOL(jbd2_journal_dirty_metadata); -EXPORT_SYMBOL(jbd2_journal_release_buffer); EXPORT_SYMBOL(jbd2_journal_forget); #if 0 EXPORT_SYMBOL(journal_sync_buffer); diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index d8da40e99d8..df9f29760ef 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -209,7 +209,8 @@ repeat: if (!new_transaction) goto alloc_transaction; write_lock(&journal->j_state_lock); - if (!journal->j_running_transaction) { + if (!journal->j_running_transaction && + !journal->j_barrier_count) { jbd2_get_transaction(journal, new_transaction); new_transaction = NULL; } @@ -1207,17 +1208,6 @@ out: return ret; } -/* - * jbd2_journal_release_buffer: undo a get_write_access without any buffer - * updates, if the update decided in the end that it didn't need access. - * - */ -void -jbd2_journal_release_buffer(handle_t *handle, struct buffer_head *bh) -{ - BUFFER_TRACE(bh, "entry"); -} - /** * void jbd2_journal_forget() - bforget() for potentially-journaled buffers. * @handle: transaction handle @@ -1850,7 +1840,6 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh, BUFFER_TRACE(bh, "entry"); -retry: /* * It is safe to proceed here without the j_list_lock because the * buffers cannot be stolen by try_to_free_buffers as long as we are @@ -1945,14 +1934,11 @@ retry: * for commit and try again. */ if (partial_page) { - tid_t tid = journal->j_committing_transaction->t_tid; - jbd2_journal_put_journal_head(jh); spin_unlock(&journal->j_list_lock); jbd_unlock_bh_state(bh); write_unlock(&journal->j_state_lock); - jbd2_log_wait_commit(journal, tid); - goto retry; + return -EBUSY; } /* * OK, buffer won't be reachable after truncate. We just set @@ -2013,21 +1999,23 @@ zap_buffer_unlocked: * @page: page to flush * @offset: length of page to invalidate. * - * Reap page buffers containing data after offset in page. - * + * Reap page buffers containing data after offset in page. Can return -EBUSY + * if buffers are part of the committing transaction and the page is straddling + * i_size. Caller then has to wait for current commit and try again. */ -void jbd2_journal_invalidatepage(journal_t *journal, - struct page *page, - unsigned long offset) +int jbd2_journal_invalidatepage(journal_t *journal, + struct page *page, + unsigned long offset) { struct buffer_head *head, *bh, *next; unsigned int curr_off = 0; int may_free = 1; + int ret = 0; if (!PageLocked(page)) BUG(); if (!page_has_buffers(page)) - return; + return 0; /* We will potentially be playing with lists other than just the * data lists (especially for journaled data mode), so be @@ -2041,9 +2029,11 @@ void jbd2_journal_invalidatepage(journal_t *journal, if (offset <= curr_off) { /* This block is wholly outside the truncation point */ lock_buffer(bh); - may_free &= journal_unmap_buffer(journal, bh, - offset > 0); + ret = journal_unmap_buffer(journal, bh, offset > 0); unlock_buffer(bh); + if (ret < 0) + return ret; + may_free &= ret; } curr_off = next_off; bh = next; @@ -2054,6 +2044,7 @@ void jbd2_journal_invalidatepage(journal_t *journal, if (may_free && try_to_free_buffers(page)) J_ASSERT(!page_has_buffers(page)); } + return 0; } /* diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c index 60ef3fb707f..1506673c087 100644 --- a/fs/jffs2/file.c +++ b/fs/jffs2/file.c @@ -138,33 +138,39 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping, struct page *pg; struct inode *inode = mapping->host; struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); + struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); + struct jffs2_raw_inode ri; + uint32_t alloc_len = 0; pgoff_t index = pos >> PAGE_CACHE_SHIFT; uint32_t pageofs = index << PAGE_CACHE_SHIFT; int ret = 0; + jffs2_dbg(1, "%s()\n", __func__); + + if (pageofs > inode->i_size) { + ret = jffs2_reserve_space(c, sizeof(ri), &alloc_len, + ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); + if (ret) + return ret; + } + + mutex_lock(&f->sem); pg = grab_cache_page_write_begin(mapping, index, flags); - if (!pg) + if (!pg) { + if (alloc_len) + jffs2_complete_reservation(c); + mutex_unlock(&f->sem); return -ENOMEM; + } *pagep = pg; - jffs2_dbg(1, "%s()\n", __func__); - - if (pageofs > inode->i_size) { + if (alloc_len) { /* Make new hole frag from old EOF to new page */ - struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); - struct jffs2_raw_inode ri; struct jffs2_full_dnode *fn; - uint32_t alloc_len; jffs2_dbg(1, "Writing new hole frag 0x%x-0x%x between current EOF and new page\n", (unsigned int)inode->i_size, pageofs); - ret = jffs2_reserve_space(c, sizeof(ri), &alloc_len, - ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); - if (ret) - goto out_page; - - mutex_lock(&f->sem); memset(&ri, 0, sizeof(ri)); ri.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); @@ -191,7 +197,6 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping, if (IS_ERR(fn)) { ret = PTR_ERR(fn); jffs2_complete_reservation(c); - mutex_unlock(&f->sem); goto out_page; } ret = jffs2_add_full_dnode_to_inode(c, f, fn); @@ -206,12 +211,10 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping, jffs2_mark_node_obsolete(c, fn->raw); jffs2_free_full_dnode(fn); jffs2_complete_reservation(c); - mutex_unlock(&f->sem); goto out_page; } jffs2_complete_reservation(c); inode->i_size = pageofs; - mutex_unlock(&f->sem); } /* @@ -220,18 +223,18 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping, * case of a short-copy. */ if (!PageUptodate(pg)) { - mutex_lock(&f->sem); ret = jffs2_do_readpage_nolock(inode, pg); - mutex_unlock(&f->sem); if (ret) goto out_page; } + mutex_unlock(&f->sem); jffs2_dbg(1, "end write_begin(). pg->flags %lx\n", pg->flags); return ret; out_page: unlock_page(pg); page_cache_release(pg); + mutex_unlock(&f->sem); return ret; } diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c index 0c96eb52c79..03310721712 100644 --- a/fs/jffs2/nodemgmt.c +++ b/fs/jffs2/nodemgmt.c @@ -417,14 +417,16 @@ static int jffs2_do_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, spin_unlock(&c->erase_completion_lock); ret = jffs2_prealloc_raw_node_refs(c, jeb, 1); - if (ret) - return ret; + /* Just lock it again and continue. Nothing much can change because we hold c->alloc_sem anyway. In fact, it's not entirely clear why we hold c->erase_completion_lock in the majority of this function... but that's a question for another (more caffeine-rich) day. */ spin_lock(&c->erase_completion_lock); + if (ret) + return ret; + waste = jeb->free_size; jffs2_link_node_ref(c, jeb, (jeb->offset + c->sector_size - waste) | REF_OBSOLETE, diff --git a/fs/jfs/file.c b/fs/jfs/file.c index 9d3afd157f9..dd7442c5835 100644 --- a/fs/jfs/file.c +++ b/fs/jfs/file.c @@ -119,9 +119,12 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr) iattr->ia_size != i_size_read(inode)) { inode_dio_wait(inode); - rc = vmtruncate(inode, iattr->ia_size); + rc = inode_newsize_ok(inode, iattr->ia_size); if (rc) return rc; + + truncate_setsize(inode, iattr->ia_size); + jfs_truncate(inode); } setattr_copy(inode, iattr); @@ -133,7 +136,6 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr) } const struct inode_operations jfs_file_inode_operations = { - .truncate = jfs_truncate, .setxattr = jfs_setxattr, .getxattr = jfs_getxattr, .listxattr = jfs_listxattr, diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c index 4692bf3ca8c..b7dc47ba675 100644 --- a/fs/jfs/inode.c +++ b/fs/jfs/inode.c @@ -300,6 +300,16 @@ static int jfs_readpages(struct file *file, struct address_space *mapping, return mpage_readpages(mapping, pages, nr_pages, jfs_get_block); } +static void jfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + jfs_truncate(inode); + } +} + static int jfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -308,11 +318,8 @@ static int jfs_write_begin(struct file *file, struct address_space *mapping, ret = nobh_write_begin(mapping, pos, len, flags, pagep, fsdata, jfs_get_block); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + jfs_write_failed(mapping, pos + len); return ret; } @@ -326,6 +333,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) { struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; struct inode *inode = file->f_mapping->host; ssize_t ret; @@ -341,7 +349,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb, loff_t end = offset + iov_length(iov, nr_segs); if (end > isize) - vmtruncate(inode, isize); + jfs_write_failed(mapping, end); } return ret; diff --git a/fs/libfs.c b/fs/libfs.c index 7cc37ca19cd..916da8c4158 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -81,11 +81,11 @@ int dcache_dir_close(struct inode *inode, struct file *file) return 0; } -loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin) +loff_t dcache_dir_lseek(struct file *file, loff_t offset, int whence) { struct dentry *dentry = file->f_path.dentry; mutex_lock(&dentry->d_inode->i_mutex); - switch (origin) { + switch (whence) { case 1: offset += file->f_pos; case 0: @@ -369,8 +369,6 @@ int simple_setattr(struct dentry *dentry, struct iattr *iattr) struct inode *inode = dentry->d_inode; int error; - WARN_ON_ONCE(inode->i_op->truncate); - error = inode_change_ok(inode, iattr); if (error) return error; diff --git a/fs/lockd/clnt4xdr.c b/fs/lockd/clnt4xdr.c index 13ad1539fbf..00ec0b9c94d 100644 --- a/fs/lockd/clnt4xdr.c +++ b/fs/lockd/clnt4xdr.c @@ -64,10 +64,6 @@ static void nlm4_compute_offsets(const struct nlm_lock *lock, { const struct file_lock *fl = &lock->fl; - BUG_ON(fl->fl_start > NLM4_OFFSET_MAX); - BUG_ON(fl->fl_end > NLM4_OFFSET_MAX && - fl->fl_end != OFFSET_MAX); - *l_offset = loff_t_to_s64(fl->fl_start); if (fl->fl_end == OFFSET_MAX) *l_len = 0; @@ -122,7 +118,6 @@ static void encode_netobj(struct xdr_stream *xdr, { __be32 *p; - BUG_ON(length > XDR_MAX_NETOBJ); p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, data, length); } @@ -156,7 +151,6 @@ out_overflow: static void encode_cookie(struct xdr_stream *xdr, const struct nlm_cookie *cookie) { - BUG_ON(cookie->len > NLM_MAXCOOKIELEN); encode_netobj(xdr, (u8 *)&cookie->data, cookie->len); } @@ -198,7 +192,6 @@ out_overflow: */ static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh) { - BUG_ON(fh->size > NFS3_FHSIZE); encode_netobj(xdr, (u8 *)&fh->data, fh->size); } @@ -336,7 +329,6 @@ static void encode_caller_name(struct xdr_stream *xdr, const char *name) u32 length = strlen(name); __be32 *p; - BUG_ON(length > NLM_MAXSTRLEN); p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, name, length); } diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c index 05d29124c6a..54f9e6ce043 100644 --- a/fs/lockd/clntproc.c +++ b/fs/lockd/clntproc.c @@ -141,7 +141,7 @@ static void nlmclnt_setlockargs(struct nlm_rqst *req, struct file_lock *fl) static void nlmclnt_release_lockargs(struct nlm_rqst *req) { - BUG_ON(req->a_args.lock.fl.fl_ops != NULL); + WARN_ON_ONCE(req->a_args.lock.fl.fl_ops != NULL); } /** @@ -465,7 +465,6 @@ static const struct file_lock_operations nlmclnt_lock_ops = { static void nlmclnt_locks_init_private(struct file_lock *fl, struct nlm_host *host) { - BUG_ON(fl->fl_ops != NULL); fl->fl_u.nfs_fl.state = 0; fl->fl_u.nfs_fl.owner = nlm_find_lockowner(host, fl->fl_owner); INIT_LIST_HEAD(&fl->fl_u.nfs_fl.list); diff --git a/fs/lockd/clntxdr.c b/fs/lockd/clntxdr.c index 982d2676e1f..9a55797a1cd 100644 --- a/fs/lockd/clntxdr.c +++ b/fs/lockd/clntxdr.c @@ -60,10 +60,6 @@ static void nlm_compute_offsets(const struct nlm_lock *lock, { const struct file_lock *fl = &lock->fl; - BUG_ON(fl->fl_start > NLM_OFFSET_MAX); - BUG_ON(fl->fl_end > NLM_OFFSET_MAX && - fl->fl_end != OFFSET_MAX); - *l_offset = loff_t_to_s32(fl->fl_start); if (fl->fl_end == OFFSET_MAX) *l_len = 0; @@ -119,7 +115,6 @@ static void encode_netobj(struct xdr_stream *xdr, { __be32 *p; - BUG_ON(length > XDR_MAX_NETOBJ); p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, data, length); } @@ -153,7 +148,6 @@ out_overflow: static void encode_cookie(struct xdr_stream *xdr, const struct nlm_cookie *cookie) { - BUG_ON(cookie->len > NLM_MAXCOOKIELEN); encode_netobj(xdr, (u8 *)&cookie->data, cookie->len); } @@ -195,7 +189,6 @@ out_overflow: */ static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh) { - BUG_ON(fh->size != NFS2_FHSIZE); encode_netobj(xdr, (u8 *)&fh->data, NFS2_FHSIZE); } @@ -330,7 +323,6 @@ static void encode_caller_name(struct xdr_stream *xdr, const char *name) u32 length = strlen(name); __be32 *p; - BUG_ON(length > NLM_MAXSTRLEN); p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, name, length); } diff --git a/fs/lockd/host.c b/fs/lockd/host.c index f9b22e58f78..0e17090c310 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -177,9 +177,6 @@ static void nlm_destroy_host_locked(struct nlm_host *host) dprintk("lockd: destroy host %s\n", host->h_name); - BUG_ON(!list_empty(&host->h_lockowners)); - BUG_ON(atomic_read(&host->h_count)); - hlist_del_init(&host->h_hash); nsm_unmonitor(host); @@ -289,13 +286,12 @@ void nlmclnt_release_host(struct nlm_host *host) dprintk("lockd: release client host %s\n", host->h_name); - BUG_ON(atomic_read(&host->h_count) < 0); - BUG_ON(host->h_server); + WARN_ON_ONCE(host->h_server); if (atomic_dec_and_test(&host->h_count)) { - BUG_ON(!list_empty(&host->h_lockowners)); - BUG_ON(!list_empty(&host->h_granted)); - BUG_ON(!list_empty(&host->h_reclaim)); + WARN_ON_ONCE(!list_empty(&host->h_lockowners)); + WARN_ON_ONCE(!list_empty(&host->h_granted)); + WARN_ON_ONCE(!list_empty(&host->h_reclaim)); mutex_lock(&nlm_host_mutex); nlm_destroy_host_locked(host); @@ -412,8 +408,7 @@ void nlmsvc_release_host(struct nlm_host *host) dprintk("lockd: release server host %s\n", host->h_name); - BUG_ON(atomic_read(&host->h_count) < 0); - BUG_ON(!host->h_server); + WARN_ON_ONCE(!host->h_server); atomic_dec(&host->h_count); } diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c index 3d7e09bcc0e..3c2cfc68363 100644 --- a/fs/lockd/mon.c +++ b/fs/lockd/mon.c @@ -154,8 +154,6 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res, .rpc_resp = res, }; - BUG_ON(clnt == NULL); - memset(res, 0, sizeof(*res)); msg.rpc_proc = &clnt->cl_procinfo[proc]; @@ -466,7 +464,6 @@ static void encode_nsm_string(struct xdr_stream *xdr, const char *string) const u32 len = strlen(string); __be32 *p; - BUG_ON(len > SM_MAXSTRLEN); p = xdr_reserve_space(xdr, 4 + len); xdr_encode_opaque(p, string, len); } diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c index e1a3b6bf632..9a59cbade2f 100644 --- a/fs/logfs/readwrite.c +++ b/fs/logfs/readwrite.c @@ -1887,9 +1887,15 @@ int logfs_truncate(struct inode *inode, u64 target) logfs_put_wblocks(sb, NULL, 1); } - if (!err) - err = vmtruncate(inode, target); + if (!err) { + err = inode_newsize_ok(inode, target); + if (err) + goto out; + + truncate_setsize(inode, target); + } + out: /* I don't trust error recovery yet. */ WARN_ON(err); return err; diff --git a/fs/minix/file.c b/fs/minix/file.c index 4493ce695ab..adc6f549423 100644 --- a/fs/minix/file.c +++ b/fs/minix/file.c @@ -34,9 +34,12 @@ static int minix_setattr(struct dentry *dentry, struct iattr *attr) if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, attr->ia_size); + error = inode_newsize_ok(inode, attr->ia_size); if (error) return error; + + truncate_setsize(inode, attr->ia_size); + minix_truncate(inode); } setattr_copy(inode, attr); @@ -45,7 +48,6 @@ static int minix_setattr(struct dentry *dentry, struct iattr *attr) } const struct inode_operations minix_file_inode_operations = { - .truncate = minix_truncate, .setattr = minix_setattr, .getattr = minix_getattr, }; diff --git a/fs/minix/inode.c b/fs/minix/inode.c index 4fc5f8ab1c4..99541cceb58 100644 --- a/fs/minix/inode.c +++ b/fs/minix/inode.c @@ -395,6 +395,16 @@ int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len) return __block_write_begin(page, pos, len, minix_get_block); } +static void minix_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + minix_truncate(inode); + } +} + static int minix_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -403,11 +413,8 @@ static int minix_write_begin(struct file *file, struct address_space *mapping, ret = block_write_begin(mapping, pos, len, flags, pagep, minix_get_block); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + minix_write_failed(mapping, pos + len); return ret; } diff --git a/fs/mount.h b/fs/mount.h index 4f291f9de64..cd500798040 100644 --- a/fs/mount.h +++ b/fs/mount.h @@ -4,8 +4,11 @@ struct mnt_namespace { atomic_t count; + unsigned int proc_inum; struct mount * root; struct list_head list; + struct user_namespace *user_ns; + u64 seq; /* Sequence number to prevent loops */ wait_queue_head_t poll; int event; }; diff --git a/fs/namei.c b/fs/namei.c index 937f9d50c84..43a97ee1d4c 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1275,9 +1275,7 @@ static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir, *need_lookup = false; dentry = d_lookup(dir, name); if (dentry) { - if (d_need_lookup(dentry)) { - *need_lookup = true; - } else if (dentry->d_flags & DCACHE_OP_REVALIDATE) { + if (dentry->d_flags & DCACHE_OP_REVALIDATE) { error = d_revalidate(dentry, flags); if (unlikely(error <= 0)) { if (error < 0) { @@ -1383,8 +1381,6 @@ static int lookup_fast(struct nameidata *nd, struct qstr *name, return -ECHILD; nd->seq = seq; - if (unlikely(d_need_lookup(dentry))) - goto unlazy; if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) { status = d_revalidate(dentry, nd->flags); if (unlikely(status <= 0)) { @@ -1410,11 +1406,6 @@ unlazy: if (unlikely(!dentry)) goto need_lookup; - if (unlikely(d_need_lookup(dentry))) { - dput(dentry); - goto need_lookup; - } - if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE) && need_reval) status = d_revalidate(dentry, nd->flags); if (unlikely(status <= 0)) { @@ -1859,7 +1850,7 @@ static int path_init(int dfd, const char *name, unsigned int flags, if (flags & LOOKUP_ROOT) { struct inode *inode = nd->root.dentry->d_inode; if (*name) { - if (!inode->i_op->lookup) + if (!can_lookup(inode)) return -ENOTDIR; retval = inode_permission(inode, MAY_EXEC); if (retval) @@ -1903,6 +1894,7 @@ static int path_init(int dfd, const char *name, unsigned int flags, get_fs_pwd(current->fs, &nd->path); } } else { + /* Caller must check execute permissions on the starting path component */ struct fd f = fdget_raw(dfd); struct dentry *dentry; @@ -1912,16 +1904,10 @@ static int path_init(int dfd, const char *name, unsigned int flags, dentry = f.file->f_path.dentry; if (*name) { - if (!S_ISDIR(dentry->d_inode->i_mode)) { + if (!can_lookup(dentry->d_inode)) { fdput(f); return -ENOTDIR; } - - retval = inode_permission(dentry->d_inode, MAY_EXEC); - if (retval) { - fdput(f); - return retval; - } } nd->path = f.file->f_path; @@ -2131,6 +2117,11 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len) if (!len) return ERR_PTR(-EACCES); + if (unlikely(name[0] == '.')) { + if (len < 2 || (len == 2 && name[1] == '.')) + return ERR_PTR(-EACCES); + } + while (len--) { c = *(const unsigned char *)name++; if (c == '/' || c == '\0') @@ -2184,15 +2175,19 @@ int user_path_at(int dfd, const char __user *name, unsigned flags, * path-walking is complete. */ static struct filename * -user_path_parent(int dfd, const char __user *path, struct nameidata *nd) +user_path_parent(int dfd, const char __user *path, struct nameidata *nd, + unsigned int flags) { struct filename *s = getname(path); int error; + /* only LOOKUP_REVAL is allowed in extra flags */ + flags &= LOOKUP_REVAL; + if (IS_ERR(s)) return s; - error = filename_lookup(dfd, s, LOOKUP_PARENT, nd); + error = filename_lookup(dfd, s, flags | LOOKUP_PARENT, nd); if (error) { putname(s); return ERR_PTR(error); @@ -3039,12 +3034,22 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt, return file; } -struct dentry *kern_path_create(int dfd, const char *pathname, struct path *path, int is_dir) +struct dentry *kern_path_create(int dfd, const char *pathname, + struct path *path, unsigned int lookup_flags) { struct dentry *dentry = ERR_PTR(-EEXIST); struct nameidata nd; int err2; - int error = do_path_lookup(dfd, pathname, LOOKUP_PARENT, &nd); + int error; + bool is_dir = (lookup_flags & LOOKUP_DIRECTORY); + + /* + * Note that only LOOKUP_REVAL and LOOKUP_DIRECTORY matter here. Any + * other flags passed in are ignored! + */ + lookup_flags &= LOOKUP_REVAL; + + error = do_path_lookup(dfd, pathname, LOOKUP_PARENT|lookup_flags, &nd); if (error) return ERR_PTR(error); @@ -3108,13 +3113,14 @@ void done_path_create(struct path *path, struct dentry *dentry) } EXPORT_SYMBOL(done_path_create); -struct dentry *user_path_create(int dfd, const char __user *pathname, struct path *path, int is_dir) +struct dentry *user_path_create(int dfd, const char __user *pathname, + struct path *path, unsigned int lookup_flags) { struct filename *tmp = getname(pathname); struct dentry *res; if (IS_ERR(tmp)) return ERR_CAST(tmp); - res = kern_path_create(dfd, tmp->name, path, is_dir); + res = kern_path_create(dfd, tmp->name, path, lookup_flags); putname(tmp); return res; } @@ -3170,12 +3176,13 @@ SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, struct dentry *dentry; struct path path; int error; + unsigned int lookup_flags = 0; error = may_mknod(mode); if (error) return error; - - dentry = user_path_create(dfd, filename, &path, 0); +retry: + dentry = user_path_create(dfd, filename, &path, lookup_flags); if (IS_ERR(dentry)) return PTR_ERR(dentry); @@ -3198,6 +3205,10 @@ SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, } out: done_path_create(&path, dentry); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -3236,8 +3247,10 @@ SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode) struct dentry *dentry; struct path path; int error; + unsigned int lookup_flags = LOOKUP_DIRECTORY; - dentry = user_path_create(dfd, pathname, &path, 1); +retry: + dentry = user_path_create(dfd, pathname, &path, lookup_flags); if (IS_ERR(dentry)) return PTR_ERR(dentry); @@ -3247,6 +3260,10 @@ SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode) if (!error) error = vfs_mkdir(path.dentry->d_inode, dentry, mode); done_path_create(&path, dentry); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -3322,8 +3339,9 @@ static long do_rmdir(int dfd, const char __user *pathname) struct filename *name; struct dentry *dentry; struct nameidata nd; - - name = user_path_parent(dfd, pathname, &nd); + unsigned int lookup_flags = 0; +retry: + name = user_path_parent(dfd, pathname, &nd, lookup_flags); if (IS_ERR(name)) return PTR_ERR(name); @@ -3365,6 +3383,10 @@ exit2: exit1: path_put(&nd.path); putname(name); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -3418,8 +3440,9 @@ static long do_unlinkat(int dfd, const char __user *pathname) struct dentry *dentry; struct nameidata nd; struct inode *inode = NULL; - - name = user_path_parent(dfd, pathname, &nd); + unsigned int lookup_flags = 0; +retry: + name = user_path_parent(dfd, pathname, &nd, lookup_flags); if (IS_ERR(name)) return PTR_ERR(name); @@ -3457,6 +3480,11 @@ exit2: exit1: path_put(&nd.path); putname(name); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + inode = NULL; + goto retry; + } return error; slashes: @@ -3508,12 +3536,13 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname, struct filename *from; struct dentry *dentry; struct path path; + unsigned int lookup_flags = 0; from = getname(oldname); if (IS_ERR(from)) return PTR_ERR(from); - - dentry = user_path_create(newdfd, newname, &path, 0); +retry: + dentry = user_path_create(newdfd, newname, &path, lookup_flags); error = PTR_ERR(dentry); if (IS_ERR(dentry)) goto out_putname; @@ -3522,6 +3551,10 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname, if (!error) error = vfs_symlink(path.dentry->d_inode, dentry, from->name); done_path_create(&path, dentry); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } out_putname: putname(from); return error; @@ -3608,12 +3641,13 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname, if (flags & AT_SYMLINK_FOLLOW) how |= LOOKUP_FOLLOW; - +retry: error = user_path_at(olddfd, oldname, how, &old_path); if (error) return error; - new_dentry = user_path_create(newdfd, newname, &new_path, 0); + new_dentry = user_path_create(newdfd, newname, &new_path, + (how & LOOKUP_REVAL)); error = PTR_ERR(new_dentry); if (IS_ERR(new_dentry)) goto out; @@ -3630,6 +3664,10 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname, error = vfs_link(old_path.dentry, new_path.dentry->d_inode, new_dentry); out_dput: done_path_create(&new_path, new_dentry); + if (retry_estale(error, how)) { + how |= LOOKUP_REVAL; + goto retry; + } out: path_put(&old_path); @@ -3802,15 +3840,17 @@ SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname, struct nameidata oldnd, newnd; struct filename *from; struct filename *to; + unsigned int lookup_flags = 0; + bool should_retry = false; int error; - - from = user_path_parent(olddfd, oldname, &oldnd); +retry: + from = user_path_parent(olddfd, oldname, &oldnd, lookup_flags); if (IS_ERR(from)) { error = PTR_ERR(from); goto exit; } - to = user_path_parent(newdfd, newname, &newnd); + to = user_path_parent(newdfd, newname, &newnd, lookup_flags); if (IS_ERR(to)) { error = PTR_ERR(to); goto exit1; @@ -3882,11 +3922,18 @@ exit3: unlock_rename(new_dir, old_dir); mnt_drop_write(oldnd.path.mnt); exit2: + if (retry_estale(error, lookup_flags)) + should_retry = true; path_put(&newnd.path); putname(to); exit1: path_put(&oldnd.path); putname(from); + if (should_retry) { + should_retry = false; + lookup_flags |= LOOKUP_REVAL; + goto retry; + } exit: return error; } diff --git a/fs/namespace.c b/fs/namespace.c index 24960626bb6..55605c55278 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -12,6 +12,7 @@ #include <linux/export.h> #include <linux/capability.h> #include <linux/mnt_namespace.h> +#include <linux/user_namespace.h> #include <linux/namei.h> #include <linux/security.h> #include <linux/idr.h> @@ -20,6 +21,7 @@ #include <linux/fs_struct.h> /* get_fs_root et.al. */ #include <linux/fsnotify.h> /* fsnotify_vfsmount_delete */ #include <linux/uaccess.h> +#include <linux/proc_fs.h> #include "pnode.h" #include "internal.h" @@ -311,7 +313,7 @@ int __mnt_want_write(struct vfsmount *m) * incremented count after it has set MNT_WRITE_HOLD. */ smp_mb(); - while (mnt->mnt.mnt_flags & MNT_WRITE_HOLD) + while (ACCESS_ONCE(mnt->mnt.mnt_flags) & MNT_WRITE_HOLD) cpu_relax(); /* * After the slowpath clears MNT_WRITE_HOLD, mnt_is_readonly will @@ -784,7 +786,7 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root, if (!mnt) return ERR_PTR(-ENOMEM); - if (flag & (CL_SLAVE | CL_PRIVATE)) + if (flag & (CL_SLAVE | CL_PRIVATE | CL_SHARED_TO_SLAVE)) mnt->mnt_group_id = 0; /* not a peer of original */ else mnt->mnt_group_id = old->mnt_group_id; @@ -805,7 +807,8 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root, list_add_tail(&mnt->mnt_instance, &sb->s_mounts); br_write_unlock(&vfsmount_lock); - if (flag & CL_SLAVE) { + if ((flag & CL_SLAVE) || + ((flag & CL_SHARED_TO_SLAVE) && IS_MNT_SHARED(old))) { list_add(&mnt->mnt_slave, &old->mnt_slave_list); mnt->mnt_master = old; CLEAR_MNT_SHARED(mnt); @@ -1266,7 +1269,7 @@ SYSCALL_DEFINE2(umount, char __user *, name, int, flags) goto dput_and_out; retval = -EPERM; - if (!capable(CAP_SYS_ADMIN)) + if (!ns_capable(mnt->mnt_ns->user_ns, CAP_SYS_ADMIN)) goto dput_and_out; retval = do_umount(mnt, flags); @@ -1292,7 +1295,7 @@ SYSCALL_DEFINE1(oldumount, char __user *, name) static int mount_is_safe(struct path *path) { - if (capable(CAP_SYS_ADMIN)) + if (ns_capable(real_mount(path->mnt)->mnt_ns->user_ns, CAP_SYS_ADMIN)) return 0; return -EPERM; #ifdef notyet @@ -1308,6 +1311,26 @@ static int mount_is_safe(struct path *path) #endif } +static bool mnt_ns_loop(struct path *path) +{ + /* Could bind mounting the mount namespace inode cause a + * mount namespace loop? + */ + struct inode *inode = path->dentry->d_inode; + struct proc_inode *ei; + struct mnt_namespace *mnt_ns; + + if (!proc_ns_inode(inode)) + return false; + + ei = PROC_I(inode); + if (ei->ns_ops != &mntns_operations) + return false; + + mnt_ns = ei->ns; + return current->nsproxy->mnt_ns->seq >= mnt_ns->seq; +} + struct mount *copy_tree(struct mount *mnt, struct dentry *dentry, int flag) { @@ -1610,7 +1633,7 @@ static int do_change_type(struct path *path, int flag) int type; int err = 0; - if (!capable(CAP_SYS_ADMIN)) + if (!ns_capable(mnt->mnt_ns->user_ns, CAP_SYS_ADMIN)) return -EPERM; if (path->dentry != path->mnt->mnt_root) @@ -1655,6 +1678,10 @@ static int do_loopback(struct path *path, const char *old_name, if (err) return err; + err = -EINVAL; + if (mnt_ns_loop(&old_path)) + goto out; + err = lock_mount(path); if (err) goto out; @@ -1770,7 +1797,7 @@ static int do_move_mount(struct path *path, const char *old_name) struct mount *p; struct mount *old; int err = 0; - if (!capable(CAP_SYS_ADMIN)) + if (!ns_capable(real_mount(path->mnt)->mnt_ns->user_ns, CAP_SYS_ADMIN)) return -EPERM; if (!old_name || !*old_name) return -EINVAL; @@ -1857,21 +1884,6 @@ static struct vfsmount *fs_set_subtype(struct vfsmount *mnt, const char *fstype) return ERR_PTR(err); } -static struct vfsmount * -do_kern_mount(const char *fstype, int flags, const char *name, void *data) -{ - struct file_system_type *type = get_fs_type(fstype); - struct vfsmount *mnt; - if (!type) - return ERR_PTR(-ENODEV); - mnt = vfs_kern_mount(type, flags, name, data); - if (!IS_ERR(mnt) && (type->fs_flags & FS_HAS_SUBTYPE) && - !mnt->mnt_sb->s_subtype) - mnt = fs_set_subtype(mnt, fstype); - put_filesystem(type); - return mnt; -} - /* * add a mount into a namespace's mount tree */ @@ -1917,20 +1929,46 @@ unlock: * create a new mount for userspace and request it to be added into the * namespace's tree */ -static int do_new_mount(struct path *path, const char *type, int flags, +static int do_new_mount(struct path *path, const char *fstype, int flags, int mnt_flags, const char *name, void *data) { + struct file_system_type *type; + struct user_namespace *user_ns; struct vfsmount *mnt; int err; - if (!type) + if (!fstype) return -EINVAL; /* we need capabilities... */ - if (!capable(CAP_SYS_ADMIN)) + user_ns = real_mount(path->mnt)->mnt_ns->user_ns; + if (!ns_capable(user_ns, CAP_SYS_ADMIN)) return -EPERM; - mnt = do_kern_mount(type, flags, name, data); + type = get_fs_type(fstype); + if (!type) + return -ENODEV; + + if (user_ns != &init_user_ns) { + if (!(type->fs_flags & FS_USERNS_MOUNT)) { + put_filesystem(type); + return -EPERM; + } + /* Only in special cases allow devices from mounts + * created outside the initial user namespace. + */ + if (!(type->fs_flags & FS_USERNS_DEV_MOUNT)) { + flags |= MS_NODEV; + mnt_flags |= MNT_NODEV; + } + } + + mnt = vfs_kern_mount(type, flags, name, data); + if (!IS_ERR(mnt) && (type->fs_flags & FS_HAS_SUBTYPE) && + !mnt->mnt_sb->s_subtype) + mnt = fs_set_subtype(mnt, fstype); + + put_filesystem(type); if (IS_ERR(mnt)) return PTR_ERR(mnt); @@ -2261,18 +2299,42 @@ dput_out: return retval; } -static struct mnt_namespace *alloc_mnt_ns(void) +static void free_mnt_ns(struct mnt_namespace *ns) +{ + proc_free_inum(ns->proc_inum); + put_user_ns(ns->user_ns); + kfree(ns); +} + +/* + * Assign a sequence number so we can detect when we attempt to bind + * mount a reference to an older mount namespace into the current + * mount namespace, preventing reference counting loops. A 64bit + * number incrementing at 10Ghz will take 12,427 years to wrap which + * is effectively never, so we can ignore the possibility. + */ +static atomic64_t mnt_ns_seq = ATOMIC64_INIT(1); + +static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns) { struct mnt_namespace *new_ns; + int ret; new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL); if (!new_ns) return ERR_PTR(-ENOMEM); + ret = proc_alloc_inum(&new_ns->proc_inum); + if (ret) { + kfree(new_ns); + return ERR_PTR(ret); + } + new_ns->seq = atomic64_add_return(1, &mnt_ns_seq); atomic_set(&new_ns->count, 1); new_ns->root = NULL; INIT_LIST_HEAD(&new_ns->list); init_waitqueue_head(&new_ns->poll); new_ns->event = 0; + new_ns->user_ns = get_user_ns(user_ns); return new_ns; } @@ -2281,24 +2343,28 @@ static struct mnt_namespace *alloc_mnt_ns(void) * copied from the namespace of the passed in task structure. */ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, - struct fs_struct *fs) + struct user_namespace *user_ns, struct fs_struct *fs) { struct mnt_namespace *new_ns; struct vfsmount *rootmnt = NULL, *pwdmnt = NULL; struct mount *p, *q; struct mount *old = mnt_ns->root; struct mount *new; + int copy_flags; - new_ns = alloc_mnt_ns(); + new_ns = alloc_mnt_ns(user_ns); if (IS_ERR(new_ns)) return new_ns; down_write(&namespace_sem); /* First pass: copy the tree topology */ - new = copy_tree(old, old->mnt.mnt_root, CL_COPY_ALL | CL_EXPIRE); + copy_flags = CL_COPY_ALL | CL_EXPIRE; + if (user_ns != mnt_ns->user_ns) + copy_flags |= CL_SHARED_TO_SLAVE; + new = copy_tree(old, old->mnt.mnt_root, copy_flags); if (IS_ERR(new)) { up_write(&namespace_sem); - kfree(new_ns); + free_mnt_ns(new_ns); return ERR_CAST(new); } new_ns->root = new; @@ -2339,7 +2405,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, } struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns, - struct fs_struct *new_fs) + struct user_namespace *user_ns, struct fs_struct *new_fs) { struct mnt_namespace *new_ns; @@ -2349,7 +2415,7 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns, if (!(flags & CLONE_NEWNS)) return ns; - new_ns = dup_mnt_ns(ns, new_fs); + new_ns = dup_mnt_ns(ns, user_ns, new_fs); put_mnt_ns(ns); return new_ns; @@ -2361,7 +2427,7 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns, */ static struct mnt_namespace *create_mnt_ns(struct vfsmount *m) { - struct mnt_namespace *new_ns = alloc_mnt_ns(); + struct mnt_namespace *new_ns = alloc_mnt_ns(&init_user_ns); if (!IS_ERR(new_ns)) { struct mount *mnt = real_mount(m); mnt->mnt_ns = new_ns; @@ -2501,7 +2567,7 @@ SYSCALL_DEFINE2(pivot_root, const char __user *, new_root, struct mount *new_mnt, *root_mnt; int error; - if (!capable(CAP_SYS_ADMIN)) + if (!ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN)) return -EPERM; error = user_path_dir(new_root, &new); @@ -2583,8 +2649,13 @@ static void __init init_mount_tree(void) struct vfsmount *mnt; struct mnt_namespace *ns; struct path root; + struct file_system_type *type; - mnt = do_kern_mount("rootfs", 0, "rootfs", NULL); + type = get_fs_type("rootfs"); + if (!type) + panic("Can't find rootfs type"); + mnt = vfs_kern_mount(type, 0, "rootfs", NULL); + put_filesystem(type); if (IS_ERR(mnt)) panic("Can't create rootfs"); @@ -2647,7 +2718,7 @@ void put_mnt_ns(struct mnt_namespace *ns) br_write_unlock(&vfsmount_lock); up_write(&namespace_sem); release_mounts(&umount_list); - kfree(ns); + free_mnt_ns(ns); } struct vfsmount *kern_mount_data(struct file_system_type *type, void *data) @@ -2681,3 +2752,72 @@ bool our_mnt(struct vfsmount *mnt) { return check_mnt(real_mount(mnt)); } + +static void *mntns_get(struct task_struct *task) +{ + struct mnt_namespace *ns = NULL; + struct nsproxy *nsproxy; + + rcu_read_lock(); + nsproxy = task_nsproxy(task); + if (nsproxy) { + ns = nsproxy->mnt_ns; + get_mnt_ns(ns); + } + rcu_read_unlock(); + + return ns; +} + +static void mntns_put(void *ns) +{ + put_mnt_ns(ns); +} + +static int mntns_install(struct nsproxy *nsproxy, void *ns) +{ + struct fs_struct *fs = current->fs; + struct mnt_namespace *mnt_ns = ns; + struct path root; + + if (!ns_capable(mnt_ns->user_ns, CAP_SYS_ADMIN) || + !nsown_capable(CAP_SYS_CHROOT) || + !nsown_capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (fs->users != 1) + return -EINVAL; + + get_mnt_ns(mnt_ns); + put_mnt_ns(nsproxy->mnt_ns); + nsproxy->mnt_ns = mnt_ns; + + /* Find the root */ + root.mnt = &mnt_ns->root->mnt; + root.dentry = mnt_ns->root->mnt.mnt_root; + path_get(&root); + while(d_mountpoint(root.dentry) && follow_down_one(&root)) + ; + + /* Update the pwd and root */ + set_fs_pwd(fs, &root); + set_fs_root(fs, &root); + + path_put(&root); + return 0; +} + +static unsigned int mntns_inum(void *ns) +{ + struct mnt_namespace *mnt_ns = ns; + return mnt_ns->proc_inum; +} + +const struct proc_ns_operations mntns_operations = { + .name = "mnt", + .type = CLONE_NEWNS, + .get = mntns_get, + .put = mntns_put, + .install = mntns_install, + .inum = mntns_inum, +}; diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c index d7e9fe77188..1acdad7fcec 100644 --- a/fs/ncpfs/inode.c +++ b/fs/ncpfs/inode.c @@ -976,9 +976,7 @@ int ncp_notify_change(struct dentry *dentry, struct iattr *attr) goto out; if (attr->ia_size != i_size_read(inode)) { - result = vmtruncate(inode, attr->ia_size); - if (result) - goto out; + truncate_setsize(inode, attr->ia_size); mark_inode_dirty(inode); } } diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile index b7db60897f9..cce2c057bd2 100644 --- a/fs/nfs/Makefile +++ b/fs/nfs/Makefile @@ -24,7 +24,7 @@ nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o delegation.o idmap.o callback.o callback_xdr.o callback_proc.o \ nfs4namespace.o nfs4getroot.o nfs4client.o nfsv4-$(CONFIG_SYSCTL) += nfs4sysctl.o -nfsv4-$(CONFIG_NFS_V4_1) += pnfs.o pnfs_dev.o +nfsv4-$(CONFIG_NFS_V4_1) += nfs4session.o pnfs.o pnfs_dev.o obj-$(CONFIG_PNFS_FILE_LAYOUT) += nfs_layout_nfsv41_files.o nfs_layout_nfsv41_files-y := nfs4filelayout.o nfs4filelayoutdev.o diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c index f1027b06a1a..4fa788c93f4 100644 --- a/fs/nfs/blocklayout/blocklayout.c +++ b/fs/nfs/blocklayout/blocklayout.c @@ -40,6 +40,7 @@ #include <linux/pagevec.h> #include "../pnfs.h" +#include "../nfs4session.h" #include "../internal.h" #include "blocklayout.h" diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c index dded2636811..862a2f16db6 100644 --- a/fs/nfs/cache_lib.c +++ b/fs/nfs/cache_lib.c @@ -118,7 +118,6 @@ int nfs_cache_register_sb(struct super_block *sb, struct cache_detail *cd) struct dentry *dir; dir = rpc_d_lookup_sb(sb, "cache"); - BUG_ON(dir == NULL); ret = sunrpc_cache_register_pipefs(dir, cd->name, 0600, cd); dput(dir); return ret; diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h index 4251c2ae06a..efd54f0a4c4 100644 --- a/fs/nfs/callback.h +++ b/fs/nfs/callback.h @@ -142,7 +142,7 @@ extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, struct cb_recallslotargs { struct sockaddr *crsa_addr; - uint32_t crsa_target_max_slots; + uint32_t crsa_target_highest_slotid; }; extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, @@ -167,8 +167,6 @@ extern __be32 nfs4_callback_layoutrecall( struct cb_layoutrecallargs *args, void *dummy, struct cb_process_state *cps); -extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses); - struct cb_devicenotifyitem { uint32_t cbd_notify_type; uint32_t cbd_layout_type; diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index 76b4a7a3e55..264d1aa935f 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -14,6 +14,7 @@ #include "delegation.h" #include "internal.h" #include "pnfs.h" +#include "nfs4session.h" #ifdef NFS_DEBUG #define NFSDBG_FACILITY NFSDBG_CALLBACK @@ -205,7 +206,7 @@ static u32 initiate_bulk_draining(struct nfs_client *clp, list_for_each_entry(lo, &server->layouts, plh_layouts) { ino = igrab(lo->plh_inode); - if (ino) + if (!ino) continue; spin_lock(&ino->i_lock); /* Is this layout in the process of being freed? */ @@ -216,7 +217,6 @@ static u32 initiate_bulk_draining(struct nfs_client *clp, } pnfs_get_layout_hdr(lo); spin_unlock(&ino->i_lock); - BUG_ON(!list_empty(&lo->plh_bulk_recall)); list_add(&lo->plh_bulk_recall, &recall_list); } } @@ -562,23 +562,16 @@ __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, if (!cps->clp) /* set in cb_sequence */ goto out; - dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target max slots %d\n", + dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %d\n", rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), - args->crsa_target_max_slots); + args->crsa_target_highest_slotid); fc_tbl = &cps->clp->cl_session->fc_slot_table; - status = htonl(NFS4ERR_BAD_HIGH_SLOT); - if (args->crsa_target_max_slots > fc_tbl->max_slots || - args->crsa_target_max_slots < 1) - goto out; - status = htonl(NFS4_OK); - if (args->crsa_target_max_slots == fc_tbl->max_slots) - goto out; - fc_tbl->target_max_slots = args->crsa_target_max_slots; - nfs41_handle_recall_slot(cps->clp); + nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); + nfs41_server_notify_target_slotid_update(cps->clp); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); return status; diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index 742ff4ffced..59461c957d9 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -16,6 +16,7 @@ #include "nfs4_fs.h" #include "callback.h" #include "internal.h" +#include "nfs4session.h" #define CB_OP_TAGLEN_MAXSZ (512) #define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ) @@ -520,7 +521,7 @@ static __be32 decode_recallslot_args(struct svc_rqst *rqstp, p = read_buf(xdr, 4); if (unlikely(p == NULL)) return htonl(NFS4ERR_BADXDR); - args->crsa_target_max_slots = ntohl(*p++); + args->crsa_target_highest_slotid = ntohl(*p++); return 0; } @@ -762,7 +763,7 @@ static void nfs4_callback_free_slot(struct nfs4_session *session) * A single slot, so highest used slotid is either 0 or -1 */ tbl->highest_used_slotid = NFS4_NO_SLOT; - nfs4_check_drain_bc_complete(session); + nfs4_session_drain_complete(session, tbl); spin_unlock(&tbl->slot_tbl_lock); } diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 8b39a42ac35..9f3c66438d0 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -277,7 +277,7 @@ void nfs_put_client(struct nfs_client *clp) nfs_cb_idr_remove_locked(clp); spin_unlock(&nn->nfs_client_lock); - BUG_ON(!list_empty(&clp->cl_superblocks)); + WARN_ON_ONCE(!list_empty(&clp->cl_superblocks)); clp->rpc_ops->free_client(clp); } @@ -615,8 +615,7 @@ EXPORT_SYMBOL_GPL(nfs_create_rpc_client); */ static void nfs_destroy_server(struct nfs_server *server) { - if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || - !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) + if (server->nlm_host) nlmclnt_done(server->nlm_host); } @@ -1061,10 +1060,6 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info, if (error < 0) goto error; - BUG_ON(!server->nfs_client); - BUG_ON(!server->nfs_client->rpc_ops); - BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); - /* Probe the root fh to retrieve its FSID */ error = nfs_probe_fsinfo(server, mount_info->mntfh, fattr); if (error < 0) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index ce8cb926526..1b2d7eb9379 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -450,7 +450,8 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) nfs_refresh_inode(dentry->d_inode, entry->fattr); goto out; } else { - d_drop(dentry); + if (d_invalidate(dentry) != 0) + goto out; dput(dentry); } } @@ -870,7 +871,7 @@ out: return res; } -static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin) +static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int whence) { struct dentry *dentry = filp->f_path.dentry; struct inode *inode = dentry->d_inode; @@ -879,10 +880,10 @@ static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin) dfprintk(FILE, "NFS: llseek dir(%s/%s, %lld, %d)\n", dentry->d_parent->d_name.name, dentry->d_name.name, - offset, origin); + offset, whence); mutex_lock(&inode->i_mutex); - switch (origin) { + switch (whence) { case 1: offset += filp->f_pos; case 0: @@ -978,10 +979,11 @@ static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags) * particular file and the "nocto" mount flag is not set. * */ -static inline +static int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags) { struct nfs_server *server = NFS_SERVER(inode); + int ret; if (IS_AUTOMOUNT(inode)) return 0; @@ -992,9 +994,13 @@ int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags) if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) && (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) goto out_force; - return 0; +out: + return (inode->i_nlink == 0) ? -ENOENT : 0; out_force: - return __nfs_revalidate_inode(server, inode); + ret = __nfs_revalidate_inode(server, inode); + if (ret != 0) + return ret; + goto out; } /* @@ -1100,6 +1106,8 @@ out_set_verifier: out_zap_parent: nfs_zap_caches(dir); out_bad: + nfs_free_fattr(fattr); + nfs_free_fhandle(fhandle); nfs_mark_for_revalidate(dir); if (inode && S_ISDIR(inode->i_mode)) { /* Purge readdir caches. */ @@ -1112,8 +1120,6 @@ out_zap_parent: shrink_dcache_parent(dentry); } d_drop(dentry); - nfs_free_fattr(fattr); - nfs_free_fhandle(fhandle); dput(parent); dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n", __func__, dentry->d_parent->d_name.name, @@ -1155,11 +1161,14 @@ static int nfs_dentry_delete(const struct dentry *dentry) } +/* Ensure that we revalidate inode->i_nlink */ static void nfs_drop_nlink(struct inode *inode) { spin_lock(&inode->i_lock); - if (inode->i_nlink > 0) - drop_nlink(inode); + /* drop the inode if we're reasonably sure this is the last link */ + if (inode->i_nlink == 1) + clear_nlink(inode); + NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; spin_unlock(&inode->i_lock); } @@ -1174,8 +1183,8 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode) NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; if (dentry->d_flags & DCACHE_NFSFS_RENAMED) { - drop_nlink(inode); nfs_complete_unlink(dentry, inode); + nfs_drop_nlink(inode); } iput(inode); } @@ -1646,10 +1655,8 @@ static int nfs_safe_remove(struct dentry *dentry) if (inode != NULL) { NFS_PROTO(inode)->return_delegation(inode); error = NFS_PROTO(dir)->remove(dir, &dentry->d_name); - /* The VFS may want to delete this inode */ if (error == 0) nfs_drop_nlink(inode); - nfs_mark_for_revalidate(inode); } else error = NFS_PROTO(dir)->remove(dir, &dentry->d_name); if (error == -ENOENT) @@ -2146,12 +2153,16 @@ static int nfs_open_permission_mask(int openflags) { int mask = 0; - if ((openflags & O_ACCMODE) != O_WRONLY) - mask |= MAY_READ; - if ((openflags & O_ACCMODE) != O_RDONLY) - mask |= MAY_WRITE; - if (openflags & __FMODE_EXEC) - mask |= MAY_EXEC; + if (openflags & __FMODE_EXEC) { + /* ONLY check exec rights */ + mask = MAY_EXEC; + } else { + if ((openflags & O_ACCMODE) != O_WRONLY) + mask |= MAY_READ; + if ((openflags & O_ACCMODE) != O_RDONLY) + mask |= MAY_WRITE; + } + return mask; } diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index cae26cbd59e..0bd7a55a5f0 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -266,21 +266,8 @@ static void nfs_direct_read_completion(struct nfs_pgio_header *hdr) struct nfs_page *req = nfs_list_entry(hdr->pages.next); struct page *page = req->wb_page; - if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) { - if (bytes > hdr->good_bytes) - zero_user(page, 0, PAGE_SIZE); - else if (hdr->good_bytes - bytes < PAGE_SIZE) - zero_user_segment(page, - hdr->good_bytes & ~PAGE_MASK, - PAGE_SIZE); - } - if (!PageCompound(page)) { - if (test_bit(NFS_IOHDR_ERROR, &hdr->flags)) { - if (bytes < hdr->good_bytes) - set_page_dirty(page); - } else - set_page_dirty(page); - } + if (!PageCompound(page) && bytes < hdr->good_bytes) + set_page_dirty(page); bytes += req->wb_bytes; nfs_list_remove_request(req); nfs_direct_readpage_release(req); diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c index 31c26c4dcc2..ca4b11ec87a 100644 --- a/fs/nfs/dns_resolve.c +++ b/fs/nfs/dns_resolve.c @@ -217,7 +217,7 @@ static int nfs_dns_parse(struct cache_detail *cd, char *buf, int buflen) { char buf1[NFS_DNS_HOSTNAME_MAXLEN+1]; struct nfs_dns_ent key, *item; - unsigned long ttl; + unsigned int ttl; ssize_t len; int ret = -EINVAL; @@ -240,7 +240,8 @@ static int nfs_dns_parse(struct cache_detail *cd, char *buf, int buflen) key.namelen = len; memset(&key.h, 0, sizeof(key.h)); - ttl = get_expiry(&buf); + if (get_uint(&buf, &ttl) < 0) + goto out; if (ttl == 0) goto out; key.h.expiry_time = ttl + seconds_since_boot(); diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 582bb886613..3c2b893665b 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -119,18 +119,18 @@ force_reval: return __nfs_revalidate_inode(server, inode); } -loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin) +loff_t nfs_file_llseek(struct file *filp, loff_t offset, int whence) { dprintk("NFS: llseek file(%s/%s, %lld, %d)\n", filp->f_path.dentry->d_parent->d_name.name, filp->f_path.dentry->d_name.name, - offset, origin); + offset, whence); /* - * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate + * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate * the cached file length */ - if (origin != SEEK_SET && origin != SEEK_CUR) { + if (whence != SEEK_SET && whence != SEEK_CUR) { struct inode *inode = filp->f_mapping->host; int retval = nfs_revalidate_file_size(inode, filp); @@ -138,7 +138,7 @@ loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin) return (loff_t)retval; } - return generic_file_llseek(filp, offset, origin); + return generic_file_llseek(filp, offset, whence); } EXPORT_SYMBOL_GPL(nfs_file_llseek); diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c index c817787fbdb..24d1d1c5fca 100644 --- a/fs/nfs/fscache.c +++ b/fs/nfs/fscache.c @@ -307,6 +307,7 @@ void nfs_fscache_set_inode_cookie(struct inode *inode, struct file *filp) nfs_fscache_inode_unlock(inode); } } +EXPORT_SYMBOL_GPL(nfs_fscache_set_inode_cookie); /* * Replace a per-inode cookie due to revalidation detecting a file having diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h index c5b11b53ff3..4ecb76652eb 100644 --- a/fs/nfs/fscache.h +++ b/fs/nfs/fscache.h @@ -153,6 +153,22 @@ static inline void nfs_readpage_to_fscache(struct inode *inode, } /* + * Invalidate the contents of fscache for this inode. This will not sleep. + */ +static inline void nfs_fscache_invalidate(struct inode *inode) +{ + fscache_invalidate(NFS_I(inode)->fscache); +} + +/* + * Wait for an object to finish being invalidated. + */ +static inline void nfs_fscache_wait_on_invalidate(struct inode *inode) +{ + fscache_wait_on_invalidate(NFS_I(inode)->fscache); +} + +/* * indicate the client caching state as readable text */ static inline const char *nfs_server_fscache_state(struct nfs_server *server) @@ -162,7 +178,6 @@ static inline const char *nfs_server_fscache_state(struct nfs_server *server) return "no "; } - #else /* CONFIG_NFS_FSCACHE */ static inline int nfs_fscache_register(void) { return 0; } static inline void nfs_fscache_unregister(void) {} @@ -205,6 +220,10 @@ static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx, static inline void nfs_readpage_to_fscache(struct inode *inode, struct page *page, int sync) {} + +static inline void nfs_fscache_invalidate(struct inode *inode) {} +static inline void nfs_fscache_wait_on_invalidate(struct inode *inode) {} + static inline const char *nfs_server_fscache_state(struct nfs_server *server) { return "no "; diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c index 9cc4a3fbf4b..bc3968fa81e 100644 --- a/fs/nfs/idmap.c +++ b/fs/nfs/idmap.c @@ -193,19 +193,15 @@ static int nfs_idmap_init_keyring(void) if (!cred) return -ENOMEM; - keyring = key_alloc(&key_type_keyring, ".id_resolver", 0, 0, cred, - (KEY_POS_ALL & ~KEY_POS_SETATTR) | - KEY_USR_VIEW | KEY_USR_READ, - KEY_ALLOC_NOT_IN_QUOTA); + keyring = keyring_alloc(".id_resolver", 0, 0, cred, + (KEY_POS_ALL & ~KEY_POS_SETATTR) | + KEY_USR_VIEW | KEY_USR_READ, + KEY_ALLOC_NOT_IN_QUOTA, NULL); if (IS_ERR(keyring)) { ret = PTR_ERR(keyring); goto failed_put_cred; } - ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL); - if (ret < 0) - goto failed_put_key; - ret = register_key_type(&key_type_id_resolver); if (ret < 0) goto failed_put_key; diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 5c7325c5c5e..ebeb94ce1b0 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -107,13 +107,19 @@ u64 nfs_compat_user_ino64(u64 fileid) return ino; } +int nfs_drop_inode(struct inode *inode) +{ + return NFS_STALE(inode) || generic_drop_inode(inode); +} +EXPORT_SYMBOL_GPL(nfs_drop_inode); + void nfs_clear_inode(struct inode *inode) { /* * The following should never happen... */ - BUG_ON(nfs_have_writebacks(inode)); - BUG_ON(!list_empty(&NFS_I(inode)->open_files)); + WARN_ON_ONCE(nfs_have_writebacks(inode)); + WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); nfs_zap_acl_cache(inode); nfs_access_zap_cache(inode); nfs_fscache_release_inode_cookie(inode); @@ -155,10 +161,12 @@ static void nfs_zap_caches_locked(struct inode *inode) nfsi->attrtimeo_timestamp = jiffies; memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); - if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) + if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; - else + nfs_fscache_invalidate(inode); + } else { nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; + } } void nfs_zap_caches(struct inode *inode) @@ -173,6 +181,7 @@ void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) if (mapping->nrpages != 0) { spin_lock(&inode->i_lock); NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; + nfs_fscache_invalidate(inode); spin_unlock(&inode->i_lock); } } @@ -685,7 +694,10 @@ static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) if (ctx->cred != NULL) put_rpccred(ctx->cred); dput(ctx->dentry); - nfs_sb_deactive(sb); + if (is_sync) + nfs_sb_deactive(sb); + else + nfs_sb_deactive_async(sb); kfree(ctx->mdsthreshold); kfree(ctx); } @@ -872,7 +884,7 @@ static int nfs_invalidate_mapping(struct inode *inode, struct address_space *map memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); spin_unlock(&inode->i_lock); nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); - nfs_fscache_reset_inode_cookie(inode); + nfs_fscache_wait_on_invalidate(inode); dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", inode->i_sb->s_id, (long long)NFS_FILEID(inode)); return 0; @@ -948,6 +960,10 @@ static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr i_size_write(inode, nfs_size_to_loff_t(fattr->size)); ret |= NFS_INO_INVALID_ATTR; } + + if (nfsi->cache_validity & NFS_INO_INVALID_DATA) + nfs_fscache_invalidate(inode); + return ret; } @@ -1196,8 +1212,10 @@ static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr struct nfs_inode *nfsi = NFS_I(inode); nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; - if (S_ISDIR(inode->i_mode)) + if (S_ISDIR(inode->i_mode)) { nfsi->cache_validity |= NFS_INO_INVALID_DATA; + nfs_fscache_invalidate(inode); + } if ((fattr->valid & NFS_ATTR_FATTR) == 0) return 0; return nfs_refresh_inode_locked(inode, fattr); @@ -1485,6 +1503,9 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) (save_cache_validity & NFS_INO_REVAL_FORCED)) nfsi->cache_validity |= invalid; + if (invalid & NFS_INO_INVALID_DATA) + nfs_fscache_invalidate(inode); + return 0; out_err: /* diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 59b133c5d65..f0e6c7df1a0 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -18,27 +18,6 @@ struct nfs_string; */ #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) -/* - * Determine if sessions are in use. - */ -static inline int nfs4_has_session(const struct nfs_client *clp) -{ -#ifdef CONFIG_NFS_V4_1 - if (clp->cl_session) - return 1; -#endif /* CONFIG_NFS_V4_1 */ - return 0; -} - -static inline int nfs4_has_persistent_session(const struct nfs_client *clp) -{ -#ifdef CONFIG_NFS_V4_1 - if (nfs4_has_session(clp)) - return (clp->cl_session->flags & SESSION4_PERSIST); -#endif /* CONFIG_NFS_V4_1 */ - return 0; -} - static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr) { if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid)) @@ -276,8 +255,6 @@ extern const u32 nfs41_maxwrite_overhead; extern struct rpc_procinfo nfs4_procedures[]; #endif -extern int nfs4_init_ds_session(struct nfs_client *, unsigned long); - /* proc.c */ void nfs_close_context(struct nfs_open_context *ctx, int is_sync); extern struct nfs_client *nfs_init_client(struct nfs_client *clp, @@ -319,6 +296,7 @@ extern struct workqueue_struct *nfsiod_workqueue; extern struct inode *nfs_alloc_inode(struct super_block *sb); extern void nfs_destroy_inode(struct inode *); extern int nfs_write_inode(struct inode *, struct writeback_control *); +extern int nfs_drop_inode(struct inode *); extern void nfs_clear_inode(struct inode *); extern void nfs_evict_inode(struct inode *); void nfs_zap_acl_cache(struct inode *inode); @@ -351,10 +329,12 @@ extern int __init register_nfs_fs(void); extern void __exit unregister_nfs_fs(void); extern void nfs_sb_active(struct super_block *sb); extern void nfs_sb_deactive(struct super_block *sb); +extern void nfs_sb_deactive_async(struct super_block *sb); /* namespace.c */ +#define NFS_PATH_CANONICAL 1 extern char *nfs_path(char **p, struct dentry *dentry, - char *buffer, ssize_t buflen); + char *buffer, ssize_t buflen, unsigned flags); extern struct vfsmount *nfs_d_automount(struct path *path); struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *, struct nfs_fh *, struct nfs_fattr *); @@ -384,9 +364,6 @@ extern int nfs_initiate_read(struct rpc_clnt *clnt, extern void nfs_read_prepare(struct rpc_task *task, void *calldata); extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr); -extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, - struct inode *inode, - const struct nfs_pgio_completion_ops *compl_ops); extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio); extern void nfs_readdata_release(struct nfs_read_data *rdata); @@ -409,9 +386,6 @@ extern struct nfs_write_header *nfs_writehdr_alloc(void); extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr); -extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, - struct inode *inode, int ioflags, - const struct nfs_pgio_completion_ops *compl_ops); extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio); extern void nfs_writedata_release(struct nfs_write_data *wdata); extern void nfs_commit_free(struct nfs_commit_data *p); @@ -472,18 +446,6 @@ extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms, const char *ip_addr, rpc_authflavor_t authflavour); -extern int _nfs4_call_sync(struct rpc_clnt *clnt, - struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply); -extern int _nfs4_call_sync_session(struct rpc_clnt *clnt, - struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply); extern int nfs40_walk_client_list(struct nfs_client *clp, struct nfs_client **result, struct rpc_cred *cred); @@ -498,7 +460,7 @@ static inline char *nfs_devname(struct dentry *dentry, char *buffer, ssize_t buflen) { char *dummy; - return nfs_path(&dummy, dentry, buffer, buflen); + return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL); } /* diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c index 8e65c7f1f87..91a6faf811a 100644 --- a/fs/nfs/mount_clnt.c +++ b/fs/nfs/mount_clnt.c @@ -169,6 +169,9 @@ int nfs_mount(struct nfs_mount_request *info) (info->hostname ? info->hostname : "server"), info->dirpath); + if (strlen(info->dirpath) > MNTPATHLEN) + return -ENAMETOOLONG; + if (info->noresvport) args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; @@ -181,7 +184,7 @@ int nfs_mount(struct nfs_mount_request *info) else msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC_MNT]; - status = rpc_call_sync(mnt_clnt, &msg, 0); + status = rpc_call_sync(mnt_clnt, &msg, RPC_TASK_SOFT|RPC_TASK_TIMEOUT); rpc_shutdown_client(mnt_clnt); if (status < 0) @@ -242,6 +245,9 @@ void nfs_umount(const struct nfs_mount_request *info) struct rpc_clnt *clnt; int status; + if (strlen(info->dirpath) > MNTPATHLEN) + return; + if (info->noresvport) args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; @@ -283,7 +289,6 @@ static void encode_mntdirpath(struct xdr_stream *xdr, const char *pathname) const u32 pathname_len = strlen(pathname); __be32 *p; - BUG_ON(pathname_len > MNTPATHLEN); p = xdr_reserve_space(xdr, 4 + pathname_len); xdr_encode_opaque(p, pathname, pathname_len); } diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 655925373b9..dd057bc6b65 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -33,6 +33,7 @@ int nfs_mountpoint_expiry_timeout = 500 * HZ; * @dentry - pointer to dentry * @buffer - result buffer * @buflen - length of buffer + * @flags - options (see below) * * Helper function for constructing the server pathname * by arbitrary hashed dentry. @@ -40,8 +41,14 @@ int nfs_mountpoint_expiry_timeout = 500 * HZ; * This is mainly for use in figuring out the path on the * server side when automounting on top of an existing partition * and in generating /proc/mounts and friends. + * + * Supported flags: + * NFS_PATH_CANONICAL: ensure there is exactly one slash after + * the original device (export) name + * (if unset, the original name is returned verbatim) */ -char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen) +char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen, + unsigned flags) { char *end; int namelen; @@ -74,7 +81,7 @@ rename_retry: rcu_read_unlock(); goto rename_retry; } - if (*end != '/') { + if ((flags & NFS_PATH_CANONICAL) && *end != '/') { if (--buflen < 0) { spin_unlock(&dentry->d_lock); rcu_read_unlock(); @@ -91,9 +98,11 @@ rename_retry: return end; } namelen = strlen(base); - /* Strip off excess slashes in base string */ - while (namelen > 0 && base[namelen - 1] == '/') - namelen--; + if (flags & NFS_PATH_CANONICAL) { + /* Strip off excess slashes in base string */ + while (namelen > 0 && base[namelen - 1] == '/') + namelen--; + } buflen -= namelen; if (buflen < 0) { spin_unlock(&dentry->d_lock); diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index d04f0df7be5..06b9df49f7f 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -195,7 +195,6 @@ static void encode_fhandle(struct xdr_stream *xdr, const struct nfs_fh *fh) { __be32 *p; - BUG_ON(fh->size != NFS2_FHSIZE); p = xdr_reserve_space(xdr, NFS2_FHSIZE); memcpy(p, fh->data, NFS2_FHSIZE); } @@ -388,7 +387,7 @@ static void encode_filename(struct xdr_stream *xdr, { __be32 *p; - BUG_ON(length > NFS2_MAXNAMLEN); + WARN_ON_ONCE(length > NFS2_MAXNAMLEN); p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, name, length); } @@ -428,7 +427,6 @@ static void encode_path(struct xdr_stream *xdr, struct page **pages, u32 length) { __be32 *p; - BUG_ON(length > NFS2_MAXPATHLEN); p = xdr_reserve_space(xdr, 4); *p = cpu_to_be32(length); xdr_write_pages(xdr, pages, 0, length); diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index 69322096c32..70efb63b1e4 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -24,14 +24,14 @@ #define NFSDBG_FACILITY NFSDBG_PROC -/* A wrapper to handle the EJUKEBOX and EKEYEXPIRED error messages */ +/* A wrapper to handle the EJUKEBOX error messages */ static int nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) { int res; do { res = rpc_call_sync(clnt, msg, flags); - if (res != -EJUKEBOX && res != -EKEYEXPIRED) + if (res != -EJUKEBOX) break; freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); res = -ERESTARTSYS; @@ -44,7 +44,7 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) static int nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) { - if (task->tk_status != -EJUKEBOX && task->tk_status != -EKEYEXPIRED) + if (task->tk_status != -EJUKEBOX) return 0; if (task->tk_status == -EJUKEBOX) nfs_inc_stats(inode, NFSIOS_DELAY); diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index 6cbe89400df..bffc32406fb 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -198,7 +198,7 @@ static void encode_filename3(struct xdr_stream *xdr, { __be32 *p; - BUG_ON(length > NFS3_MAXNAMLEN); + WARN_ON_ONCE(length > NFS3_MAXNAMLEN); p = xdr_reserve_space(xdr, 4 + length); xdr_encode_opaque(p, name, length); } @@ -238,7 +238,6 @@ out_overflow: static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, const u32 length) { - BUG_ON(length > NFS3_MAXPATHLEN); encode_uint32(xdr, length); xdr_write_pages(xdr, pages, 0, length); } @@ -388,7 +387,6 @@ out_overflow: */ static void encode_ftype3(struct xdr_stream *xdr, const u32 type) { - BUG_ON(type > NF3FIFO); encode_uint32(xdr, type); } @@ -443,7 +441,7 @@ static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) { __be32 *p; - BUG_ON(fh->size > NFS3_FHSIZE); + WARN_ON_ONCE(fh->size > NFS3_FHSIZE); p = xdr_reserve_space(xdr, 4 + fh->size); xdr_encode_opaque(p, fh->data, fh->size); } @@ -1339,6 +1337,7 @@ static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, error = nfsacl_encode(xdr->buf, base, args->inode, (args->mask & NFS_ACL) ? args->acl_access : NULL, 1, 0); + /* FIXME: this is just broken */ BUG_ON(error < 0); error = nfsacl_encode(xdr->buf, base + error, args->inode, (args->mask & NFS_DFACL) ? diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index a525fdefccd..a3f488b074a 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -11,6 +11,8 @@ #if IS_ENABLED(CONFIG_NFS_V4) +#define NFS4_MAX_LOOP_ON_RECOVER (10) + struct idmap; enum nfs4_client_state { @@ -21,18 +23,12 @@ enum nfs4_client_state { NFS4CLNT_RECLAIM_NOGRACE, NFS4CLNT_DELEGRETURN, NFS4CLNT_SESSION_RESET, - NFS4CLNT_RECALL_SLOT, NFS4CLNT_LEASE_CONFIRM, NFS4CLNT_SERVER_SCOPE_MISMATCH, NFS4CLNT_PURGE_STATE, NFS4CLNT_BIND_CONN_TO_SESSION, }; -enum nfs4_session_state { - NFS4_SESSION_INITING, - NFS4_SESSION_DRAINING, -}; - #define NFS4_RENEW_TIMEOUT 0x01 #define NFS4_RENEW_DELEGATION_CB 0x02 @@ -43,8 +39,7 @@ struct nfs4_minor_version_ops { struct nfs_server *server, struct rpc_message *msg, struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply); + struct nfs4_sequence_res *res); bool (*match_stateid)(const nfs4_stateid *, const nfs4_stateid *); int (*find_root_sec)(struct nfs_server *, struct nfs_fh *, @@ -241,18 +236,14 @@ static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *ser return server->nfs_client->cl_session; } -extern bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy); extern int nfs4_setup_sequence(const struct nfs_server *server, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, struct rpc_task *task); extern int nfs41_setup_sequence(struct nfs4_session *session, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, struct rpc_task *task); -extern void nfs4_destroy_session(struct nfs4_session *session); -extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp); extern int nfs4_proc_create_session(struct nfs_client *, struct rpc_cred *); extern int nfs4_proc_destroy_session(struct nfs4_session *, struct rpc_cred *); -extern int nfs4_init_session(struct nfs_server *server); extern int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo); extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, @@ -280,11 +271,7 @@ static inline int nfs4_setup_sequence(const struct nfs_server *server, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, struct rpc_task *task) { - return 0; -} - -static inline int nfs4_init_session(struct nfs_server *server) -{ + rpc_call_start(task); return 0; } @@ -321,17 +308,20 @@ extern void nfs4_renew_state(struct work_struct *); /* nfs4state.c */ struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp); +struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp); struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp); int nfs4_discover_server_trunking(struct nfs_client *clp, struct nfs_client **); int nfs40_discover_server_trunking(struct nfs_client *clp, struct nfs_client **, struct rpc_cred *); #if defined(CONFIG_NFS_V4_1) -struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp); struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp); int nfs41_discover_server_trunking(struct nfs_client *clp, struct nfs_client **, struct rpc_cred *); extern void nfs4_schedule_session_recovery(struct nfs4_session *, int); +extern void nfs41_server_notify_target_slotid_update(struct nfs_client *clp); +extern void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp); + #else static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) { @@ -349,11 +339,12 @@ extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t); extern void nfs_inode_find_state_and_recover(struct inode *inode, const nfs4_stateid *stateid); extern void nfs4_schedule_lease_recovery(struct nfs_client *); +extern int nfs4_wait_clnt_recover(struct nfs_client *clp); +extern int nfs4_client_recover_expired_lease(struct nfs_client *clp); extern void nfs4_schedule_state_manager(struct nfs_client *); extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp); extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *); extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags); -extern void nfs41_handle_recall_slot(struct nfs_client *clp); extern void nfs41_handle_server_scope(struct nfs_client *, struct nfs41_server_scope **); extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 6bacfde1319..acc34726812 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -12,6 +12,7 @@ #include "internal.h" #include "callback.h" #include "delegation.h" +#include "nfs4session.h" #include "pnfs.h" #include "netns.h" @@ -713,10 +714,6 @@ static int nfs4_server_common_setup(struct nfs_server *server, struct nfs_fattr *fattr; int error; - BUG_ON(!server->nfs_client); - BUG_ON(!server->nfs_client->rpc_ops); - BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); - /* data servers support only a subset of NFSv4.1 */ if (is_ds_only_client(server->nfs_client)) return -EPROTONOSUPPORT; diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index afddd6639af..08ddcccb888 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -5,6 +5,7 @@ */ #include <linux/nfs_fs.h> #include "internal.h" +#include "fscache.h" #include "pnfs.h" #define NFSDBG_FACILITY NFSDBG_FILE @@ -20,7 +21,6 @@ nfs4_file_open(struct inode *inode, struct file *filp) struct iattr attr; int err; - BUG_ON(inode != dentry->d_inode); /* * If no cached dentry exists or if it's negative, NFSv4 handled the * opens in ->lookup() or ->create(). @@ -75,6 +75,7 @@ nfs4_file_open(struct inode *inode, struct file *filp) nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); nfs_file_set_open_context(filp, ctx); + nfs_fscache_set_inode_cookie(inode, filp); err = 0; out_put_ctx: diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c index 2e45fd9c02a..194c4841033 100644 --- a/fs/nfs/nfs4filelayout.c +++ b/fs/nfs/nfs4filelayout.c @@ -35,6 +35,7 @@ #include <linux/sunrpc/metrics.h> +#include "nfs4session.h" #include "internal.h" #include "delegation.h" #include "nfs4filelayout.h" @@ -178,7 +179,6 @@ static int filelayout_async_handle_error(struct rpc_task *task, break; case -NFS4ERR_DELAY: case -NFS4ERR_GRACE: - case -EKEYEXPIRED: rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX); break; case -NFS4ERR_RETRY_UNCACHED_REP: @@ -306,12 +306,10 @@ static void filelayout_read_prepare(struct rpc_task *task, void *data) } rdata->read_done_cb = filelayout_read_done_cb; - if (nfs41_setup_sequence(rdata->ds_clp->cl_session, - &rdata->args.seq_args, &rdata->res.seq_res, - task)) - return; - - rpc_call_start(task); + nfs41_setup_sequence(rdata->ds_clp->cl_session, + &rdata->args.seq_args, + &rdata->res.seq_res, + task); } static void filelayout_read_call_done(struct rpc_task *task, void *data) @@ -408,12 +406,10 @@ static void filelayout_write_prepare(struct rpc_task *task, void *data) rpc_exit(task, 0); return; } - if (nfs41_setup_sequence(wdata->ds_clp->cl_session, - &wdata->args.seq_args, &wdata->res.seq_res, - task)) - return; - - rpc_call_start(task); + nfs41_setup_sequence(wdata->ds_clp->cl_session, + &wdata->args.seq_args, + &wdata->res.seq_res, + task); } static void filelayout_write_call_done(struct rpc_task *task, void *data) @@ -449,12 +445,10 @@ static void filelayout_commit_prepare(struct rpc_task *task, void *data) { struct nfs_commit_data *wdata = data; - if (nfs41_setup_sequence(wdata->ds_clp->cl_session, - &wdata->args.seq_args, &wdata->res.seq_res, - task)) - return; - - rpc_call_start(task); + nfs41_setup_sequence(wdata->ds_clp->cl_session, + &wdata->args.seq_args, + &wdata->res.seq_res, + task); } static void filelayout_write_commit_done(struct rpc_task *task, void *data) @@ -512,7 +506,6 @@ filelayout_read_pagelist(struct nfs_read_data *data) loff_t offset = data->args.offset; u32 j, idx; struct nfs_fh *fh; - int status; dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", __func__, hdr->inode->i_ino, @@ -538,9 +531,8 @@ filelayout_read_pagelist(struct nfs_read_data *data) data->mds_offset = offset; /* Perform an asynchronous read to ds */ - status = nfs_initiate_read(ds->ds_clp->cl_rpcclient, data, + nfs_initiate_read(ds->ds_clp->cl_rpcclient, data, &filelayout_read_call_ops, RPC_TASK_SOFTCONN); - BUG_ON(status != 0); return PNFS_ATTEMPTED; } @@ -554,7 +546,6 @@ filelayout_write_pagelist(struct nfs_write_data *data, int sync) loff_t offset = data->args.offset; u32 j, idx; struct nfs_fh *fh; - int status; /* Retrieve the correct rpc_client for the byte range */ j = nfs4_fl_calc_j_index(lseg, offset); @@ -579,10 +570,9 @@ filelayout_write_pagelist(struct nfs_write_data *data, int sync) data->args.offset = filelayout_get_dserver_offset(lseg, offset); /* Perform an asynchronous write */ - status = nfs_initiate_write(ds->ds_clp->cl_rpcclient, data, + nfs_initiate_write(ds->ds_clp->cl_rpcclient, data, &filelayout_write_call_ops, sync, RPC_TASK_SOFTCONN); - BUG_ON(status != 0); return PNFS_ATTEMPTED; } @@ -909,7 +899,7 @@ static void filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) { - BUG_ON(pgio->pg_lseg != NULL); + WARN_ON_ONCE(pgio->pg_lseg != NULL); if (req->wb_offset != req->wb_pgbase) { /* @@ -939,7 +929,7 @@ filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_commit_info cinfo; int status; - BUG_ON(pgio->pg_lseg != NULL); + WARN_ON_ONCE(pgio->pg_lseg != NULL); if (req->wb_offset != req->wb_pgbase) goto out_mds; @@ -1187,7 +1177,6 @@ static void filelayout_recover_commit_reqs(struct list_head *dst, */ for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) { if (transfer_commit_list(&b->written, dst, cinfo, 0)) { - BUG_ON(!list_empty(&b->written)); pnfs_put_lseg(b->wlseg); b->wlseg = NULL; } diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c index a8eaa9b7bb0..b720064bcd7 100644 --- a/fs/nfs/nfs4filelayoutdev.c +++ b/fs/nfs/nfs4filelayoutdev.c @@ -33,6 +33,7 @@ #include <linux/module.h> #include "internal.h" +#include "nfs4session.h" #include "nfs4filelayout.h" #define NFSDBG_FACILITY NFSDBG_PNFS_LD @@ -162,8 +163,6 @@ nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds) dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr, mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor); - BUG_ON(list_empty(&ds->ds_addrs)); - list_for_each_entry(da, &ds->ds_addrs, da_node) { dprintk("%s: DS %s: trying address %s\n", __func__, ds->ds_remotestr, da->da_remotestr); diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c index 79fbb61ce20..1e09eb78543 100644 --- a/fs/nfs/nfs4namespace.c +++ b/fs/nfs/nfs4namespace.c @@ -81,7 +81,8 @@ static char *nfs_path_component(const char *nfspath, const char *end) static char *nfs4_path(struct dentry *dentry, char *buffer, ssize_t buflen) { char *limit; - char *path = nfs_path(&limit, dentry, buffer, buflen); + char *path = nfs_path(&limit, dentry, buffer, buflen, + NFS_PATH_CANONICAL); if (!IS_ERR(path)) { char *path_component = nfs_path_component(path, limit); if (path_component) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 68b21d81b7a..cf747ef8665 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -52,7 +52,6 @@ #include <linux/mount.h> #include <linux/module.h> #include <linux/nfs_idmap.h> -#include <linux/sunrpc/bc_xprt.h> #include <linux/xattr.h> #include <linux/utsname.h> #include <linux/freezer.h> @@ -64,14 +63,14 @@ #include "callback.h" #include "pnfs.h" #include "netns.h" +#include "nfs4session.h" +#include "fscache.h" #define NFSDBG_FACILITY NFSDBG_PROC #define NFS4_POLL_RETRY_MIN (HZ/10) #define NFS4_POLL_RETRY_MAX (15*HZ) -#define NFS4_MAX_LOOP_ON_RECOVER (10) - struct nfs4_opendata; static int _nfs4_proc_open(struct nfs4_opendata *data); static int _nfs4_recover_proc_open(struct nfs4_opendata *data); @@ -206,7 +205,6 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent { __be32 *start, *p; - BUG_ON(readdir->count < 80); if (cookie > 2) { readdir->cookie = cookie; memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); @@ -256,22 +254,6 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent kunmap_atomic(start); } -static int nfs4_wait_clnt_recover(struct nfs_client *clp) -{ - int res; - - might_sleep(); - - res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, - nfs_wait_bit_killable, TASK_KILLABLE); - if (res) - return res; - - if (clp->cl_cons_state < 0) - return clp->cl_cons_state; - return 0; -} - static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) { int res = 0; @@ -339,8 +321,7 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc dprintk("%s ERROR: %d Reset session\n", __func__, errorcode); nfs4_schedule_session_recovery(clp->cl_session, errorcode); - exception->retry = 1; - break; + goto wait_on_recovery; #endif /* defined(CONFIG_NFS_V4_1) */ case -NFS4ERR_FILE_OPEN: if (exception->timeout > HZ) { @@ -352,7 +333,6 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc } case -NFS4ERR_GRACE: case -NFS4ERR_DELAY: - case -EKEYEXPIRED: ret = nfs4_delay(server->client, &exception->timeout); if (ret != 0) break; @@ -398,144 +378,136 @@ static void renew_lease(const struct nfs_server *server, unsigned long timestamp #if defined(CONFIG_NFS_V4_1) -/* - * nfs4_free_slot - free a slot and efficiently update slot table. - * - * freeing a slot is trivially done by clearing its respective bit - * in the bitmap. - * If the freed slotid equals highest_used_slotid we want to update it - * so that the server would be able to size down the slot table if needed, - * otherwise we know that the highest_used_slotid is still in use. - * When updating highest_used_slotid there may be "holes" in the bitmap - * so we need to scan down from highest_used_slotid to 0 looking for the now - * highest slotid in use. - * If none found, highest_used_slotid is set to NFS4_NO_SLOT. - * - * Must be called while holding tbl->slot_tbl_lock - */ -static void -nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid) -{ - BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE); - /* clear used bit in bitmap */ - __clear_bit(slotid, tbl->used_slots); - - /* update highest_used_slotid when it is freed */ - if (slotid == tbl->highest_used_slotid) { - slotid = find_last_bit(tbl->used_slots, tbl->max_slots); - if (slotid < tbl->max_slots) - tbl->highest_used_slotid = slotid; - else - tbl->highest_used_slotid = NFS4_NO_SLOT; - } - dprintk("%s: slotid %u highest_used_slotid %d\n", __func__, - slotid, tbl->highest_used_slotid); -} - -bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy) -{ - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - return true; -} - -/* - * Signal state manager thread if session fore channel is drained - */ -static void nfs4_check_drain_fc_complete(struct nfs4_session *ses) -{ - if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { - rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq, - nfs4_set_task_privileged, NULL); - return; - } - - if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT) - return; - - dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__); - complete(&ses->fc_slot_table.complete); -} - -/* - * Signal state manager thread if session back channel is drained - */ -void nfs4_check_drain_bc_complete(struct nfs4_session *ses) -{ - if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) || - ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT) - return; - dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__); - complete(&ses->bc_slot_table.complete); -} - static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) { + struct nfs4_session *session; struct nfs4_slot_table *tbl; + bool send_new_highest_used_slotid = false; - tbl = &res->sr_session->fc_slot_table; if (!res->sr_slot) { /* just wake up the next guy waiting since * we may have not consumed a slot after all */ dprintk("%s: No slot\n", __func__); return; } + tbl = res->sr_slot->table; + session = tbl->session; spin_lock(&tbl->slot_tbl_lock); - nfs4_free_slot(tbl, res->sr_slot - tbl->slots); - nfs4_check_drain_fc_complete(res->sr_session); + /* Be nice to the server: try to ensure that the last transmitted + * value for highest_user_slotid <= target_highest_slotid + */ + if (tbl->highest_used_slotid > tbl->target_highest_slotid) + send_new_highest_used_slotid = true; + + if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) { + send_new_highest_used_slotid = false; + goto out_unlock; + } + nfs4_free_slot(tbl, res->sr_slot); + + if (tbl->highest_used_slotid != NFS4_NO_SLOT) + send_new_highest_used_slotid = false; +out_unlock: spin_unlock(&tbl->slot_tbl_lock); res->sr_slot = NULL; + if (send_new_highest_used_slotid) + nfs41_server_notify_highest_slotid_update(session->clp); } static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) { - unsigned long timestamp; + struct nfs4_session *session; + struct nfs4_slot *slot; struct nfs_client *clp; - - /* - * sr_status remains 1 if an RPC level error occurred. The server - * may or may not have processed the sequence operation.. - * Proceed as if the server received and processed the sequence - * operation. - */ - if (res->sr_status == 1) - res->sr_status = NFS_OK; + bool interrupted = false; + int ret = 1; /* don't increment the sequence number if the task wasn't sent */ if (!RPC_WAS_SENT(task)) goto out; + slot = res->sr_slot; + session = slot->table->session; + + if (slot->interrupted) { + slot->interrupted = 0; + interrupted = true; + } + /* Check the SEQUENCE operation status */ switch (res->sr_status) { case 0: /* Update the slot's sequence and clientid lease timer */ - ++res->sr_slot->seq_nr; - timestamp = res->sr_renewal_time; - clp = res->sr_session->clp; - do_renew_lease(clp, timestamp); + ++slot->seq_nr; + clp = session->clp; + do_renew_lease(clp, res->sr_timestamp); /* Check sequence flags */ if (res->sr_status_flags != 0) nfs4_schedule_lease_recovery(clp); + nfs41_update_target_slotid(slot->table, slot, res); break; + case 1: + /* + * sr_status remains 1 if an RPC level error occurred. + * The server may or may not have processed the sequence + * operation.. + * Mark the slot as having hosted an interrupted RPC call. + */ + slot->interrupted = 1; + goto out; case -NFS4ERR_DELAY: /* The server detected a resend of the RPC call and * returned NFS4ERR_DELAY as per Section 2.10.6.2 * of RFC5661. */ - dprintk("%s: slot=%td seq=%d: Operation in progress\n", + dprintk("%s: slot=%u seq=%u: Operation in progress\n", __func__, - res->sr_slot - res->sr_session->fc_slot_table.slots, - res->sr_slot->seq_nr); + slot->slot_nr, + slot->seq_nr); goto out_retry; + case -NFS4ERR_BADSLOT: + /* + * The slot id we used was probably retired. Try again + * using a different slot id. + */ + goto retry_nowait; + case -NFS4ERR_SEQ_MISORDERED: + /* + * Was the last operation on this sequence interrupted? + * If so, retry after bumping the sequence number. + */ + if (interrupted) { + ++slot->seq_nr; + goto retry_nowait; + } + /* + * Could this slot have been previously retired? + * If so, then the server may be expecting seq_nr = 1! + */ + if (slot->seq_nr != 1) { + slot->seq_nr = 1; + goto retry_nowait; + } + break; + case -NFS4ERR_SEQ_FALSE_RETRY: + ++slot->seq_nr; + goto retry_nowait; default: /* Just update the slot sequence no. */ - ++res->sr_slot->seq_nr; + ++slot->seq_nr; } out: /* The session may be reset by one of the error handlers. */ dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); nfs41_sequence_free_slot(res); - return 1; + return ret; +retry_nowait: + if (rpc_restart_call_prepare(task)) { + task->tk_status = 0; + ret = 0; + } + goto out; out_retry: if (!rpc_restart_call(task)) goto out; @@ -546,55 +518,27 @@ out_retry: static int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) { - if (res->sr_session == NULL) + if (res->sr_slot == NULL) return 1; return nfs41_sequence_done(task, res); } -/* - * nfs4_find_slot - efficiently look for a free slot - * - * nfs4_find_slot looks for an unset bit in the used_slots bitmap. - * If found, we mark the slot as used, update the highest_used_slotid, - * and respectively set up the sequence operation args. - * The slot number is returned if found, or NFS4_NO_SLOT otherwise. - * - * Note: must be called with under the slot_tbl_lock. - */ -static u32 -nfs4_find_slot(struct nfs4_slot_table *tbl) -{ - u32 slotid; - u32 ret_id = NFS4_NO_SLOT; - - dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n", - __func__, tbl->used_slots[0], tbl->highest_used_slotid, - tbl->max_slots); - slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); - if (slotid >= tbl->max_slots) - goto out; - __set_bit(slotid, tbl->used_slots); - if (slotid > tbl->highest_used_slotid || - tbl->highest_used_slotid == NFS4_NO_SLOT) - tbl->highest_used_slotid = slotid; - ret_id = slotid; -out: - dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", - __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); - return ret_id; -} - static void nfs41_init_sequence(struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, int cache_reply) { - args->sa_session = NULL; + args->sa_slot = NULL; args->sa_cache_this = 0; + args->sa_privileged = 0; if (cache_reply) args->sa_cache_this = 1; - res->sr_session = NULL; res->sr_slot = NULL; } +static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) +{ + args->sa_privileged = 1; +} + int nfs41_setup_sequence(struct nfs4_session *session, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, @@ -602,59 +546,59 @@ int nfs41_setup_sequence(struct nfs4_session *session, { struct nfs4_slot *slot; struct nfs4_slot_table *tbl; - u32 slotid; dprintk("--> %s\n", __func__); /* slot already allocated? */ if (res->sr_slot != NULL) - return 0; + goto out_success; tbl = &session->fc_slot_table; + task->tk_timeout = 0; + spin_lock(&tbl->slot_tbl_lock); if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && - !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { + !args->sa_privileged) { /* The state manager will wait until the slot table is empty */ - rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); - spin_unlock(&tbl->slot_tbl_lock); dprintk("%s session is draining\n", __func__); - return -EAGAIN; + goto out_sleep; } - if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && - !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { - rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); - spin_unlock(&tbl->slot_tbl_lock); - dprintk("%s enforce FIFO order\n", __func__); - return -EAGAIN; - } - - slotid = nfs4_find_slot(tbl); - if (slotid == NFS4_NO_SLOT) { - rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); - spin_unlock(&tbl->slot_tbl_lock); + slot = nfs4_alloc_slot(tbl); + if (IS_ERR(slot)) { + /* If out of memory, try again in 1/4 second */ + if (slot == ERR_PTR(-ENOMEM)) + task->tk_timeout = HZ >> 2; dprintk("<-- %s: no free slots\n", __func__); - return -EAGAIN; + goto out_sleep; } spin_unlock(&tbl->slot_tbl_lock); - rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); - slot = tbl->slots + slotid; - args->sa_session = session; - args->sa_slotid = slotid; + args->sa_slot = slot; - dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); + dprintk("<-- %s slotid=%d seqid=%d\n", __func__, + slot->slot_nr, slot->seq_nr); - res->sr_session = session; res->sr_slot = slot; - res->sr_renewal_time = jiffies; + res->sr_timestamp = jiffies; res->sr_status_flags = 0; /* * sr_status is only set in decode_sequence, and so will remain * set to 1 if an rpc level failure occurs. */ res->sr_status = 1; +out_success: + rpc_call_start(task); return 0; +out_sleep: + /* Privileged tasks are queued with top priority */ + if (args->sa_privileged) + rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, + NULL, RPC_PRIORITY_PRIVILEGED); + else + rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); + spin_unlock(&tbl->slot_tbl_lock); + return -EAGAIN; } EXPORT_SYMBOL_GPL(nfs41_setup_sequence); @@ -666,12 +610,14 @@ int nfs4_setup_sequence(const struct nfs_server *server, struct nfs4_session *session = nfs4_get_session(server); int ret = 0; - if (session == NULL) + if (session == NULL) { + rpc_call_start(task); goto out; + } - dprintk("--> %s clp %p session %p sr_slot %td\n", + dprintk("--> %s clp %p session %p sr_slot %d\n", __func__, session->clp, session, res->sr_slot ? - res->sr_slot - session->fc_slot_table.slots : -1); + res->sr_slot->slot_nr : -1); ret = nfs41_setup_sequence(session, args, res, task); out: @@ -688,19 +634,11 @@ struct nfs41_call_sync_data { static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) { struct nfs41_call_sync_data *data = calldata; + struct nfs4_session *session = nfs4_get_session(data->seq_server); dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); - if (nfs4_setup_sequence(data->seq_server, data->seq_args, - data->seq_res, task)) - return; - rpc_call_start(task); -} - -static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) -{ - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - nfs41_call_sync_prepare(task, calldata); + nfs41_setup_sequence(session, data->seq_args, data->seq_res, task); } static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) @@ -715,17 +653,11 @@ static const struct rpc_call_ops nfs41_call_sync_ops = { .rpc_call_done = nfs41_call_sync_done, }; -static const struct rpc_call_ops nfs41_call_priv_sync_ops = { - .rpc_call_prepare = nfs41_call_priv_sync_prepare, - .rpc_call_done = nfs41_call_sync_done, -}; - static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, struct nfs_server *server, struct rpc_message *msg, struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int privileged) + struct nfs4_sequence_res *res) { int ret; struct rpc_task *task; @@ -741,8 +673,6 @@ static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, .callback_data = &data }; - if (privileged) - task_setup.callback_ops = &nfs41_call_priv_sync_ops; task = rpc_run_task(&task_setup); if (IS_ERR(task)) ret = PTR_ERR(task); @@ -753,24 +683,18 @@ static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, return ret; } -int _nfs4_call_sync_session(struct rpc_clnt *clnt, - struct nfs_server *server, - struct rpc_message *msg, - struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply) -{ - nfs41_init_sequence(args, res, cache_reply); - return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0); -} - #else -static inline +static void nfs41_init_sequence(struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, int cache_reply) { } +static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) +{ +} + + static int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) { @@ -778,18 +702,17 @@ static int nfs4_sequence_done(struct rpc_task *task, } #endif /* CONFIG_NFS_V4_1 */ +static int _nfs4_call_sync(struct rpc_clnt *clnt, struct nfs_server *server, struct rpc_message *msg, struct nfs4_sequence_args *args, - struct nfs4_sequence_res *res, - int cache_reply) + struct nfs4_sequence_res *res) { - nfs41_init_sequence(args, res, cache_reply); return rpc_call_sync(clnt, msg, 0); } -static inline +static int nfs4_call_sync(struct rpc_clnt *clnt, struct nfs_server *server, struct rpc_message *msg, @@ -797,8 +720,9 @@ int nfs4_call_sync(struct rpc_clnt *clnt, struct nfs4_sequence_res *res, int cache_reply) { + nfs41_init_sequence(args, res, cache_reply); return server->nfs_client->cl_mvops->call_sync(clnt, server, msg, - args, res, cache_reply); + args, res); } static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) @@ -810,6 +734,7 @@ static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) if (!cinfo->atomic || cinfo->before != dir->i_version) nfs_force_lookup_revalidate(dir); dir->i_version = cinfo->after; + nfs_fscache_invalidate(dir); spin_unlock(&dir->i_lock); } @@ -1446,13 +1371,6 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state nfs_inode_find_state_and_recover(state->inode, stateid); nfs4_schedule_stateid_recovery(server, state); - case -EKEYEXPIRED: - /* - * User RPCSEC_GSS context has expired. - * We cannot recover this stateid now, so - * skip it and allow recovery thread to - * proceed. - */ case -ENOMEM: err = 0; goto out; @@ -1572,21 +1490,15 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata) data->timestamp = jiffies; if (nfs4_setup_sequence(data->o_arg.server, &data->o_arg.seq_args, - &data->o_res.seq_res, task)) - return; - rpc_call_start(task); + &data->o_res.seq_res, + task) != 0) + nfs_release_seqid(data->o_arg.seqid); return; unlock_no_action: rcu_read_unlock(); out_no_action: task->tk_action = NULL; - -} - -static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) -{ - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - nfs4_open_prepare(task, calldata); + nfs4_sequence_done(task, &data->o_res.seq_res); } static void nfs4_open_done(struct rpc_task *task, void *calldata) @@ -1647,12 +1559,6 @@ static const struct rpc_call_ops nfs4_open_ops = { .rpc_release = nfs4_open_release, }; -static const struct rpc_call_ops nfs4_recover_open_ops = { - .rpc_call_prepare = nfs4_recover_open_prepare, - .rpc_call_done = nfs4_open_done, - .rpc_release = nfs4_open_release, -}; - static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) { struct inode *dir = data->dir->d_inode; @@ -1682,7 +1588,7 @@ static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) data->rpc_status = 0; data->cancelled = 0; if (isrecover) - task_setup_data.callback_ops = &nfs4_recover_open_ops; + nfs4_set_sequence_privileged(&o_arg->seq_args); task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); @@ -1720,7 +1626,8 @@ static int _nfs4_recover_proc_open(struct nfs4_opendata *data) static int nfs4_opendata_access(struct rpc_cred *cred, struct nfs4_opendata *opendata, - struct nfs4_state *state, fmode_t fmode) + struct nfs4_state *state, fmode_t fmode, + int openflags) { struct nfs_access_entry cache; u32 mask; @@ -1732,11 +1639,14 @@ static int nfs4_opendata_access(struct rpc_cred *cred, mask = 0; /* don't check MAY_WRITE - a newly created file may not have - * write mode bits, but POSIX allows the creating process to write */ - if (fmode & FMODE_READ) - mask |= MAY_READ; - if (fmode & FMODE_EXEC) - mask |= MAY_EXEC; + * write mode bits, but POSIX allows the creating process to write. + * use openflags to check for exec, because fmode won't + * always have FMODE_EXEC set when file open for exec. */ + if (openflags & __FMODE_EXEC) { + /* ONLY check for exec rights */ + mask = MAY_EXEC; + } else if (fmode & FMODE_READ) + mask = MAY_READ; cache.cred = cred; cache.jiffies = jiffies; @@ -1748,7 +1658,7 @@ static int nfs4_opendata_access(struct rpc_cred *cred, /* even though OPEN succeeded, access is denied. Close the file */ nfs4_close_state(state, fmode); - return -NFS4ERR_ACCESS; + return -EACCES; } /* @@ -1788,24 +1698,6 @@ static int _nfs4_proc_open(struct nfs4_opendata *data) return 0; } -static int nfs4_client_recover_expired_lease(struct nfs_client *clp) -{ - unsigned int loop; - int ret; - - for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { - ret = nfs4_wait_clnt_recover(clp); - if (ret != 0) - break; - if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && - !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) - break; - nfs4_schedule_state_manager(clp); - ret = -EIO; - } - return ret; -} - static int nfs4_recover_expired_lease(struct nfs_server *server) { return nfs4_client_recover_expired_lease(server->nfs_client); @@ -2008,7 +1900,7 @@ static int _nfs4_do_open(struct inode *dir, if (server->caps & NFS_CAP_POSIX_LOCK) set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); - status = nfs4_opendata_access(cred, opendata, state, fmode); + status = nfs4_opendata_access(cred, opendata, state, fmode, flags); if (status != 0) goto err_opendata_put; @@ -2196,7 +2088,7 @@ static void nfs4_free_closedata(void *data) nfs4_put_open_state(calldata->state); nfs_free_seqid(calldata->arg.seqid); nfs4_put_state_owner(sp); - nfs_sb_deactive(sb); + nfs_sb_deactive_async(sb); kfree(calldata); } @@ -2281,6 +2173,7 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data) if (!call_close) { /* Note: exit _without_ calling nfs4_close_done */ task->tk_action = NULL; + nfs4_sequence_done(task, &calldata->res.seq_res); goto out; } @@ -2296,9 +2189,8 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data) if (nfs4_setup_sequence(NFS_SERVER(inode), &calldata->arg.seq_args, &calldata->res.seq_res, - task)) - goto out; - rpc_call_start(task); + task) != 0) + nfs_release_seqid(calldata->arg.seqid); out: dprintk("%s: done!\n", __func__); } @@ -2531,7 +2423,8 @@ static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS]; len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array)); - BUG_ON(len < 0); + if (len < 0) + return len; for (i = 0; i < len; i++) { /* AUTH_UNIX is the default flavor if none was specified, @@ -3036,12 +2929,10 @@ static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) { - if (nfs4_setup_sequence(NFS_SERVER(data->dir), - &data->args.seq_args, - &data->res.seq_res, - task)) - return; - rpc_call_start(task); + nfs4_setup_sequence(NFS_SERVER(data->dir), + &data->args.seq_args, + &data->res.seq_res, + task); } static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) @@ -3069,12 +2960,10 @@ static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) { - if (nfs4_setup_sequence(NFS_SERVER(data->old_dir), - &data->args.seq_args, - &data->res.seq_res, - task)) - return; - rpc_call_start(task); + nfs4_setup_sequence(NFS_SERVER(data->old_dir), + &data->args.seq_args, + &data->res.seq_res, + task); } static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, @@ -3360,9 +3249,6 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, int mode = sattr->ia_mode; int status = -ENOMEM; - BUG_ON(!(sattr->ia_valid & ATTR_MODE)); - BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); - data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); if (data == NULL) goto out; @@ -3378,10 +3264,13 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, data->arg.ftype = NF4CHR; data->arg.u.device.specdata1 = MAJOR(rdev); data->arg.u.device.specdata2 = MINOR(rdev); + } else if (!S_ISSOCK(mode)) { + status = -EINVAL; + goto out_free; } status = nfs4_do_create(dir, dentry, data); - +out_free: nfs4_free_createdata(data); out: return status; @@ -3563,12 +3452,10 @@ static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data) { - if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), - &data->args.seq_args, - &data->res.seq_res, - task)) - return; - rpc_call_start(task); + nfs4_setup_sequence(NFS_SERVER(data->header->inode), + &data->args.seq_args, + &data->res.seq_res, + task); } static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data) @@ -3629,22 +3516,18 @@ static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_messag static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data) { - if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), - &data->args.seq_args, - &data->res.seq_res, - task)) - return; - rpc_call_start(task); + nfs4_setup_sequence(NFS_SERVER(data->header->inode), + &data->args.seq_args, + &data->res.seq_res, + task); } static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) { - if (nfs4_setup_sequence(NFS_SERVER(data->inode), - &data->args.seq_args, - &data->res.seq_res, - task)) - return; - rpc_call_start(task); + nfs4_setup_sequence(NFS_SERVER(data->inode), + &data->args.seq_args, + &data->res.seq_res, + task); } static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) @@ -3935,8 +3818,13 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu goto out_free; } nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); - if (buf) + if (buf) { + if (res.acl_len > buflen) { + ret = -ERANGE; + goto out_free; + } _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); + } out_ok: ret = res.acl_len; out_free: @@ -4083,7 +3971,6 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, case -NFS4ERR_DELAY: nfs_inc_server_stats(server, NFSIOS_DELAY); case -NFS4ERR_GRACE: - case -EKEYEXPIRED: rpc_delay(task, NFS4_POLL_RETRY_MAX); task->tk_status = 0; return -EAGAIN; @@ -4291,11 +4178,10 @@ static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) d_data = (struct nfs4_delegreturndata *)data; - if (nfs4_setup_sequence(d_data->res.server, - &d_data->args.seq_args, - &d_data->res.seq_res, task)) - return; - rpc_call_start(task); + nfs4_setup_sequence(d_data->res.server, + &d_data->args.seq_args, + &d_data->res.seq_res, + task); } #endif /* CONFIG_NFS_V4_1 */ @@ -4529,6 +4415,7 @@ static void nfs4_locku_done(struct rpc_task *task, void *data) if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) rpc_restart_call_prepare(task); } + nfs_release_seqid(calldata->arg.seqid); } static void nfs4_locku_prepare(struct rpc_task *task, void *data) @@ -4540,14 +4427,15 @@ static void nfs4_locku_prepare(struct rpc_task *task, void *data) if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { /* Note: exit _without_ running nfs4_locku_done */ task->tk_action = NULL; + nfs4_sequence_done(task, &calldata->res.seq_res); return; } calldata->timestamp = jiffies; if (nfs4_setup_sequence(calldata->server, &calldata->arg.seq_args, - &calldata->res.seq_res, task)) - return; - rpc_call_start(task); + &calldata->res.seq_res, + task) != 0) + nfs_release_seqid(calldata->arg.seqid); } static const struct rpc_call_ops nfs4_locku_ops = { @@ -4691,8 +4579,9 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) return; /* Do we need to do an open_to_lock_owner? */ if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { - if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) - return; + if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { + goto out_release_lock_seqid; + } data->arg.open_stateid = &state->stateid; data->arg.new_lock_owner = 1; data->res.open_seqid = data->arg.open_seqid; @@ -4701,18 +4590,15 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) data->timestamp = jiffies; if (nfs4_setup_sequence(data->server, &data->arg.seq_args, - &data->res.seq_res, task)) + &data->res.seq_res, + task) == 0) return; - rpc_call_start(task); + nfs_release_seqid(data->arg.open_seqid); +out_release_lock_seqid: + nfs_release_seqid(data->arg.lock_seqid); dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); } -static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) -{ - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - nfs4_lock_prepare(task, calldata); -} - static void nfs4_lock_done(struct rpc_task *task, void *calldata) { struct nfs4_lockdata *data = calldata; @@ -4765,12 +4651,6 @@ static const struct rpc_call_ops nfs4_lock_ops = { .rpc_release = nfs4_lock_release, }; -static const struct rpc_call_ops nfs4_recover_lock_ops = { - .rpc_call_prepare = nfs4_recover_lock_prepare, - .rpc_call_done = nfs4_lock_done, - .rpc_release = nfs4_lock_release, -}; - static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) { switch (error) { @@ -4813,15 +4693,15 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f return -ENOMEM; if (IS_SETLKW(cmd)) data->arg.block = 1; - if (recovery_type > NFS_LOCK_NEW) { - if (recovery_type == NFS_LOCK_RECLAIM) - data->arg.reclaim = NFS_LOCK_RECLAIM; - task_setup_data.callback_ops = &nfs4_recover_lock_ops; - } nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); msg.rpc_argp = &data->arg; msg.rpc_resp = &data->res; task_setup_data.callback_data = data; + if (recovery_type > NFS_LOCK_NEW) { + if (recovery_type == NFS_LOCK_RECLAIM) + data->arg.reclaim = NFS_LOCK_RECLAIM; + nfs4_set_sequence_privileged(&data->arg.seq_args); + } task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); @@ -5090,15 +4970,6 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) nfs4_schedule_stateid_recovery(server, state); err = 0; goto out; - case -EKEYEXPIRED: - /* - * User RPCSEC_GSS context has expired. - * We cannot recover this stateid now, so - * skip it and allow recovery thread to - * proceed. - */ - err = 0; - goto out; case -ENOMEM: case -NFS4ERR_DENIED: /* kill_proc(fl->fl_pid, SIGLOST, 1); */ @@ -5347,7 +5218,6 @@ int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred }; dprintk("--> %s\n", __func__); - BUG_ON(clp == NULL); res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); if (unlikely(res.session == NULL)) { @@ -5559,20 +5429,16 @@ struct nfs4_get_lease_time_data { static void nfs4_get_lease_time_prepare(struct rpc_task *task, void *calldata) { - int ret; struct nfs4_get_lease_time_data *data = (struct nfs4_get_lease_time_data *)calldata; dprintk("--> %s\n", __func__); - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); /* just setup sequence, do not trigger session recovery since we're invoked within one */ - ret = nfs41_setup_sequence(data->clp->cl_session, - &data->args->la_seq_args, - &data->res->lr_seq_res, task); - - BUG_ON(ret == -EAGAIN); - rpc_call_start(task); + nfs41_setup_sequence(data->clp->cl_session, + &data->args->la_seq_args, + &data->res->lr_seq_res, + task); dprintk("<-- %s\n", __func__); } @@ -5634,6 +5500,7 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) int status; nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); + nfs4_set_sequence_privileged(&args.la_seq_args); dprintk("--> %s\n", __func__); task = rpc_run_task(&task_setup); @@ -5648,145 +5515,6 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) return status; } -static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags) -{ - return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags); -} - -static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl, - struct nfs4_slot *new, - u32 max_slots, - u32 ivalue) -{ - struct nfs4_slot *old = NULL; - u32 i; - - spin_lock(&tbl->slot_tbl_lock); - if (new) { - old = tbl->slots; - tbl->slots = new; - tbl->max_slots = max_slots; - } - tbl->highest_used_slotid = -1; /* no slot is currently used */ - for (i = 0; i < tbl->max_slots; i++) - tbl->slots[i].seq_nr = ivalue; - spin_unlock(&tbl->slot_tbl_lock); - kfree(old); -} - -/* - * (re)Initialise a slot table - */ -static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, - u32 ivalue) -{ - struct nfs4_slot *new = NULL; - int ret = -ENOMEM; - - dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, - max_reqs, tbl->max_slots); - - /* Does the newly negotiated max_reqs match the existing slot table? */ - if (max_reqs != tbl->max_slots) { - new = nfs4_alloc_slots(max_reqs, GFP_NOFS); - if (!new) - goto out; - } - ret = 0; - - nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue); - dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, - tbl, tbl->slots, tbl->max_slots); -out: - dprintk("<-- %s: return %d\n", __func__, ret); - return ret; -} - -/* Destroy the slot table */ -static void nfs4_destroy_slot_tables(struct nfs4_session *session) -{ - if (session->fc_slot_table.slots != NULL) { - kfree(session->fc_slot_table.slots); - session->fc_slot_table.slots = NULL; - } - if (session->bc_slot_table.slots != NULL) { - kfree(session->bc_slot_table.slots); - session->bc_slot_table.slots = NULL; - } - return; -} - -/* - * Initialize or reset the forechannel and backchannel tables - */ -static int nfs4_setup_session_slot_tables(struct nfs4_session *ses) -{ - struct nfs4_slot_table *tbl; - int status; - - dprintk("--> %s\n", __func__); - /* Fore channel */ - tbl = &ses->fc_slot_table; - status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1); - if (status) /* -ENOMEM */ - return status; - /* Back channel */ - tbl = &ses->bc_slot_table; - status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0); - if (status && tbl->slots == NULL) - /* Fore and back channel share a connection so get - * both slot tables or neither */ - nfs4_destroy_slot_tables(ses); - return status; -} - -struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) -{ - struct nfs4_session *session; - struct nfs4_slot_table *tbl; - - session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); - if (!session) - return NULL; - - tbl = &session->fc_slot_table; - tbl->highest_used_slotid = NFS4_NO_SLOT; - spin_lock_init(&tbl->slot_tbl_lock); - rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); - init_completion(&tbl->complete); - - tbl = &session->bc_slot_table; - tbl->highest_used_slotid = NFS4_NO_SLOT; - spin_lock_init(&tbl->slot_tbl_lock); - rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); - init_completion(&tbl->complete); - - session->session_state = 1<<NFS4_SESSION_INITING; - - session->clp = clp; - return session; -} - -void nfs4_destroy_session(struct nfs4_session *session) -{ - struct rpc_xprt *xprt; - struct rpc_cred *cred; - - cred = nfs4_get_exchange_id_cred(session->clp); - nfs4_proc_destroy_session(session, cred); - if (cred) - put_rpccred(cred); - - rcu_read_lock(); - xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt); - rcu_read_unlock(); - dprintk("%s Destroy backchannel for xprt %p\n", - __func__, xprt); - xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); - nfs4_destroy_slot_tables(session); - kfree(session); -} - /* * Initialize the values to be used by the client in CREATE_SESSION * If nfs4_init_session set the fore channel request and response sizes, @@ -5799,8 +5527,8 @@ void nfs4_destroy_session(struct nfs4_session *session) static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) { struct nfs4_session *session = args->client->cl_session; - unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, - mxresp_sz = session->fc_attrs.max_resp_sz; + unsigned int mxrqst_sz = session->fc_target_max_rqst_sz, + mxresp_sz = session->fc_target_max_resp_sz; if (mxrqst_sz == 0) mxrqst_sz = NFS_MAX_FILE_IO_SIZE; @@ -5909,10 +5637,9 @@ static int _nfs4_proc_create_session(struct nfs_client *clp, status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); - if (!status) + if (!status) { /* Verify the session's negotiated channel_attrs values */ status = nfs4_verify_channel_attrs(&args, session); - if (!status) { /* Increment the clientid slot sequence id */ clp->cl_seqid++; } @@ -5982,83 +5709,6 @@ int nfs4_proc_destroy_session(struct nfs4_session *session, } /* - * With sessions, the client is not marked ready until after a - * successful EXCHANGE_ID and CREATE_SESSION. - * - * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate - * other versions of NFS can be tried. - */ -static int nfs41_check_session_ready(struct nfs_client *clp) -{ - int ret; - - if (clp->cl_cons_state == NFS_CS_SESSION_INITING) { - ret = nfs4_client_recover_expired_lease(clp); - if (ret) - return ret; - } - if (clp->cl_cons_state < NFS_CS_READY) - return -EPROTONOSUPPORT; - smp_rmb(); - return 0; -} - -int nfs4_init_session(struct nfs_server *server) -{ - struct nfs_client *clp = server->nfs_client; - struct nfs4_session *session; - unsigned int rsize, wsize; - - if (!nfs4_has_session(clp)) - return 0; - - session = clp->cl_session; - spin_lock(&clp->cl_lock); - if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) { - - rsize = server->rsize; - if (rsize == 0) - rsize = NFS_MAX_FILE_IO_SIZE; - wsize = server->wsize; - if (wsize == 0) - wsize = NFS_MAX_FILE_IO_SIZE; - - session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; - session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; - } - spin_unlock(&clp->cl_lock); - - return nfs41_check_session_ready(clp); -} - -int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time) -{ - struct nfs4_session *session = clp->cl_session; - int ret; - - spin_lock(&clp->cl_lock); - if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) { - /* - * Do not set NFS_CS_CHECK_LEASE_TIME instead set the - * DS lease to be equal to the MDS lease. - */ - clp->cl_lease_time = lease_time; - clp->cl_last_renewal = jiffies; - } - spin_unlock(&clp->cl_lock); - - ret = nfs41_check_session_ready(clp); - if (ret) - return ret; - /* Test for the DS role */ - if (!is_ds_client(clp)) - return -ENODEV; - return 0; -} -EXPORT_SYMBOL_GPL(nfs4_init_ds_session); - - -/* * Renew the cl_session lease. */ struct nfs4_sequence_data { @@ -6123,9 +5773,7 @@ static void nfs41_sequence_prepare(struct rpc_task *task, void *data) args = task->tk_msg.rpc_argp; res = task->tk_msg.rpc_resp; - if (nfs41_setup_sequence(clp->cl_session, args, res, task)) - return; - rpc_call_start(task); + nfs41_setup_sequence(clp->cl_session, args, res, task); } static const struct rpc_call_ops nfs41_sequence_ops = { @@ -6134,7 +5782,9 @@ static const struct rpc_call_ops nfs41_sequence_ops = { .rpc_release = nfs41_sequence_release, }; -static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) +static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, + struct rpc_cred *cred, + bool is_privileged) { struct nfs4_sequence_data *calldata; struct rpc_message msg = { @@ -6156,6 +5806,8 @@ static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_ return ERR_PTR(-ENOMEM); } nfs41_init_sequence(&calldata->args, &calldata->res, 0); + if (is_privileged) + nfs4_set_sequence_privileged(&calldata->args); msg.rpc_argp = &calldata->args; msg.rpc_resp = &calldata->res; calldata->clp = clp; @@ -6171,7 +5823,7 @@ static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cr if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) return 0; - task = _nfs41_proc_sequence(clp, cred); + task = _nfs41_proc_sequence(clp, cred, false); if (IS_ERR(task)) ret = PTR_ERR(task); else @@ -6185,7 +5837,7 @@ static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) struct rpc_task *task; int ret; - task = _nfs41_proc_sequence(clp, cred); + task = _nfs41_proc_sequence(clp, cred, true); if (IS_ERR(task)) { ret = PTR_ERR(task); goto out; @@ -6214,13 +5866,10 @@ static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) { struct nfs4_reclaim_complete_data *calldata = data; - rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); - if (nfs41_setup_sequence(calldata->clp->cl_session, - &calldata->arg.seq_args, - &calldata->res.seq_res, task)) - return; - - rpc_call_start(task); + nfs41_setup_sequence(calldata->clp->cl_session, + &calldata->arg.seq_args, + &calldata->res.seq_res, + task); } static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) @@ -6297,6 +5946,7 @@ static int nfs41_proc_reclaim_complete(struct nfs_client *clp) calldata->arg.one_fs = 0; nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); + nfs4_set_sequence_privileged(&calldata->arg.seq_args); msg.rpc_argp = &calldata->arg; msg.rpc_resp = &calldata->res; task_setup_data.callback_data = calldata; @@ -6320,6 +5970,7 @@ nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) { struct nfs4_layoutget *lgp = calldata; struct nfs_server *server = NFS_SERVER(lgp->args.inode); + struct nfs4_session *session = nfs4_get_session(server); dprintk("--> %s\n", __func__); /* Note the is a race here, where a CB_LAYOUTRECALL can come in @@ -6327,16 +5978,14 @@ nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) * However, that is not so catastrophic, and there seems * to be no way to prevent it completely. */ - if (nfs4_setup_sequence(server, &lgp->args.seq_args, + if (nfs41_setup_sequence(session, &lgp->args.seq_args, &lgp->res.seq_res, task)) return; if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, NFS_I(lgp->args.inode)->layout, lgp->args.ctx->state)) { rpc_exit(task, NFS4_OK); - return; } - rpc_call_start(task); } static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) @@ -6349,7 +5998,7 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) dprintk("--> %s\n", __func__); - if (!nfs4_sequence_done(task, &lgp->res.seq_res)) + if (!nfs41_sequence_done(task, &lgp->res.seq_res)) goto out; switch (task->tk_status) { @@ -6500,10 +6149,10 @@ nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) struct nfs4_layoutreturn *lrp = calldata; dprintk("--> %s\n", __func__); - if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args, - &lrp->res.seq_res, task)) - return; - rpc_call_start(task); + nfs41_setup_sequence(lrp->clp->cl_session, + &lrp->args.seq_args, + &lrp->res.seq_res, + task); } static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) @@ -6513,7 +6162,7 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) dprintk("--> %s\n", __func__); - if (!nfs4_sequence_done(task, &lrp->res.seq_res)) + if (!nfs41_sequence_done(task, &lrp->res.seq_res)) return; server = NFS_SERVER(lrp->args.inode); @@ -6662,11 +6311,12 @@ static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) { struct nfs4_layoutcommit_data *data = calldata; struct nfs_server *server = NFS_SERVER(data->args.inode); + struct nfs4_session *session = nfs4_get_session(server); - if (nfs4_setup_sequence(server, &data->args.seq_args, - &data->res.seq_res, task)) - return; - rpc_call_start(task); + nfs41_setup_sequence(session, + &data->args.seq_args, + &data->res.seq_res, + task); } static void @@ -6675,7 +6325,7 @@ nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) struct nfs4_layoutcommit_data *data = calldata; struct nfs_server *server = NFS_SERVER(data->args.inode); - if (!nfs4_sequence_done(task, &data->res.seq_res)) + if (!nfs41_sequence_done(task, &data->res.seq_res)) return; switch (task->tk_status) { /* Just ignore these failures */ @@ -6863,7 +6513,9 @@ static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid) dprintk("NFS call test_stateid %p\n", stateid); nfs41_init_sequence(&args.seq_args, &res.seq_res, 0); - status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); + nfs4_set_sequence_privileged(&args.seq_args); + status = nfs4_call_sync_sequence(server->client, server, &msg, + &args.seq_args, &res.seq_res); if (status != NFS_OK) { dprintk("NFS reply test_stateid: failed, %d\n", status); return status; @@ -6910,8 +6562,9 @@ static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid) dprintk("NFS call free_stateid %p\n", stateid); nfs41_init_sequence(&args.seq_args, &res.seq_res, 0); + nfs4_set_sequence_privileged(&args.seq_args); status = nfs4_call_sync_sequence(server->client, server, &msg, - &args.seq_args, &res.seq_res, 1); + &args.seq_args, &res.seq_res); dprintk("NFS reply free_stateid: %d\n", status); return status; } @@ -7031,7 +6684,7 @@ static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { #if defined(CONFIG_NFS_V4_1) static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { .minor_version = 1, - .call_sync = _nfs4_call_sync_session, + .call_sync = nfs4_call_sync_sequence, .match_stateid = nfs41_match_stateid, .find_root_sec = nfs41_find_root_sec, .reboot_recovery_ops = &nfs41_reboot_recovery_ops, diff --git a/fs/nfs/nfs4session.c b/fs/nfs/nfs4session.c new file mode 100644 index 00000000000..ebda5f4a031 --- /dev/null +++ b/fs/nfs/nfs4session.c @@ -0,0 +1,552 @@ +/* + * fs/nfs/nfs4session.c + * + * Copyright (c) 2012 Trond Myklebust <Trond.Myklebust@netapp.com> + * + */ +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/printk.h> +#include <linux/slab.h> +#include <linux/sunrpc/sched.h> +#include <linux/sunrpc/bc_xprt.h> +#include <linux/nfs.h> +#include <linux/nfs4.h> +#include <linux/nfs_fs.h> +#include <linux/module.h> + +#include "nfs4_fs.h" +#include "internal.h" +#include "nfs4session.h" +#include "callback.h" + +#define NFSDBG_FACILITY NFSDBG_STATE + +/* + * nfs4_shrink_slot_table - free retired slots from the slot table + */ +static void nfs4_shrink_slot_table(struct nfs4_slot_table *tbl, u32 newsize) +{ + struct nfs4_slot **p; + if (newsize >= tbl->max_slots) + return; + + p = &tbl->slots; + while (newsize--) + p = &(*p)->next; + while (*p) { + struct nfs4_slot *slot = *p; + + *p = slot->next; + kfree(slot); + tbl->max_slots--; + } +} + +/* + * nfs4_free_slot - free a slot and efficiently update slot table. + * + * freeing a slot is trivially done by clearing its respective bit + * in the bitmap. + * If the freed slotid equals highest_used_slotid we want to update it + * so that the server would be able to size down the slot table if needed, + * otherwise we know that the highest_used_slotid is still in use. + * When updating highest_used_slotid there may be "holes" in the bitmap + * so we need to scan down from highest_used_slotid to 0 looking for the now + * highest slotid in use. + * If none found, highest_used_slotid is set to NFS4_NO_SLOT. + * + * Must be called while holding tbl->slot_tbl_lock + */ +void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot) +{ + u32 slotid = slot->slot_nr; + + /* clear used bit in bitmap */ + __clear_bit(slotid, tbl->used_slots); + + /* update highest_used_slotid when it is freed */ + if (slotid == tbl->highest_used_slotid) { + u32 new_max = find_last_bit(tbl->used_slots, slotid); + if (new_max < slotid) + tbl->highest_used_slotid = new_max; + else { + tbl->highest_used_slotid = NFS4_NO_SLOT; + nfs4_session_drain_complete(tbl->session, tbl); + } + } + dprintk("%s: slotid %u highest_used_slotid %d\n", __func__, + slotid, tbl->highest_used_slotid); +} + +static struct nfs4_slot *nfs4_new_slot(struct nfs4_slot_table *tbl, + u32 slotid, u32 seq_init, gfp_t gfp_mask) +{ + struct nfs4_slot *slot; + + slot = kzalloc(sizeof(*slot), gfp_mask); + if (slot) { + slot->table = tbl; + slot->slot_nr = slotid; + slot->seq_nr = seq_init; + } + return slot; +} + +static struct nfs4_slot *nfs4_find_or_create_slot(struct nfs4_slot_table *tbl, + u32 slotid, u32 seq_init, gfp_t gfp_mask) +{ + struct nfs4_slot **p, *slot; + + p = &tbl->slots; + for (;;) { + if (*p == NULL) { + *p = nfs4_new_slot(tbl, tbl->max_slots, + seq_init, gfp_mask); + if (*p == NULL) + break; + tbl->max_slots++; + } + slot = *p; + if (slot->slot_nr == slotid) + return slot; + p = &slot->next; + } + return ERR_PTR(-ENOMEM); +} + +/* + * nfs4_alloc_slot - efficiently look for a free slot + * + * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap. + * If found, we mark the slot as used, update the highest_used_slotid, + * and respectively set up the sequence operation args. + * + * Note: must be called with under the slot_tbl_lock. + */ +struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl) +{ + struct nfs4_slot *ret = ERR_PTR(-EBUSY); + u32 slotid; + + dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n", + __func__, tbl->used_slots[0], tbl->highest_used_slotid, + tbl->max_slotid + 1); + slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slotid + 1); + if (slotid > tbl->max_slotid) + goto out; + ret = nfs4_find_or_create_slot(tbl, slotid, 1, GFP_NOWAIT); + if (IS_ERR(ret)) + goto out; + __set_bit(slotid, tbl->used_slots); + if (slotid > tbl->highest_used_slotid || + tbl->highest_used_slotid == NFS4_NO_SLOT) + tbl->highest_used_slotid = slotid; + ret->generation = tbl->generation; + +out: + dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", + __func__, tbl->used_slots[0], tbl->highest_used_slotid, + !IS_ERR(ret) ? ret->slot_nr : -1); + return ret; +} + +static int nfs4_grow_slot_table(struct nfs4_slot_table *tbl, + u32 max_reqs, u32 ivalue) +{ + if (max_reqs <= tbl->max_slots) + return 0; + if (!IS_ERR(nfs4_find_or_create_slot(tbl, max_reqs - 1, ivalue, GFP_NOFS))) + return 0; + return -ENOMEM; +} + +static void nfs4_reset_slot_table(struct nfs4_slot_table *tbl, + u32 server_highest_slotid, + u32 ivalue) +{ + struct nfs4_slot **p; + + nfs4_shrink_slot_table(tbl, server_highest_slotid + 1); + p = &tbl->slots; + while (*p) { + (*p)->seq_nr = ivalue; + (*p)->interrupted = 0; + p = &(*p)->next; + } + tbl->highest_used_slotid = NFS4_NO_SLOT; + tbl->target_highest_slotid = server_highest_slotid; + tbl->server_highest_slotid = server_highest_slotid; + tbl->d_target_highest_slotid = 0; + tbl->d2_target_highest_slotid = 0; + tbl->max_slotid = server_highest_slotid; +} + +/* + * (re)Initialise a slot table + */ +static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, + u32 max_reqs, u32 ivalue) +{ + int ret; + + dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, + max_reqs, tbl->max_slots); + + if (max_reqs > NFS4_MAX_SLOT_TABLE) + max_reqs = NFS4_MAX_SLOT_TABLE; + + ret = nfs4_grow_slot_table(tbl, max_reqs, ivalue); + if (ret) + goto out; + + spin_lock(&tbl->slot_tbl_lock); + nfs4_reset_slot_table(tbl, max_reqs - 1, ivalue); + spin_unlock(&tbl->slot_tbl_lock); + + dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, + tbl, tbl->slots, tbl->max_slots); +out: + dprintk("<-- %s: return %d\n", __func__, ret); + return ret; +} + +/* Destroy the slot table */ +static void nfs4_destroy_slot_tables(struct nfs4_session *session) +{ + nfs4_shrink_slot_table(&session->fc_slot_table, 0); + nfs4_shrink_slot_table(&session->bc_slot_table, 0); +} + +static bool nfs41_assign_slot(struct rpc_task *task, void *pslot) +{ + struct nfs4_sequence_args *args = task->tk_msg.rpc_argp; + struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; + struct nfs4_slot *slot = pslot; + struct nfs4_slot_table *tbl = slot->table; + + if (nfs4_session_draining(tbl->session) && !args->sa_privileged) + return false; + slot->generation = tbl->generation; + args->sa_slot = slot; + res->sr_timestamp = jiffies; + res->sr_slot = slot; + res->sr_status_flags = 0; + res->sr_status = 1; + return true; +} + +static bool __nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot) +{ + if (rpc_wake_up_first(&tbl->slot_tbl_waitq, nfs41_assign_slot, slot)) + return true; + return false; +} + +bool nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot) +{ + if (slot->slot_nr > tbl->max_slotid) + return false; + return __nfs41_wake_and_assign_slot(tbl, slot); +} + +static bool nfs41_try_wake_next_slot_table_entry(struct nfs4_slot_table *tbl) +{ + struct nfs4_slot *slot = nfs4_alloc_slot(tbl); + if (!IS_ERR(slot)) { + bool ret = __nfs41_wake_and_assign_slot(tbl, slot); + if (ret) + return ret; + nfs4_free_slot(tbl, slot); + } + return false; +} + +void nfs41_wake_slot_table(struct nfs4_slot_table *tbl) +{ + for (;;) { + if (!nfs41_try_wake_next_slot_table_entry(tbl)) + break; + } +} + +static void nfs41_set_max_slotid_locked(struct nfs4_slot_table *tbl, + u32 target_highest_slotid) +{ + u32 max_slotid; + + max_slotid = min(NFS4_MAX_SLOT_TABLE - 1, target_highest_slotid); + if (max_slotid > tbl->server_highest_slotid) + max_slotid = tbl->server_highest_slotid; + if (max_slotid > tbl->target_highest_slotid) + max_slotid = tbl->target_highest_slotid; + tbl->max_slotid = max_slotid; + nfs41_wake_slot_table(tbl); +} + +/* Update the client's idea of target_highest_slotid */ +static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl, + u32 target_highest_slotid) +{ + if (tbl->target_highest_slotid == target_highest_slotid) + return; + tbl->target_highest_slotid = target_highest_slotid; + tbl->generation++; +} + +void nfs41_set_target_slotid(struct nfs4_slot_table *tbl, + u32 target_highest_slotid) +{ + spin_lock(&tbl->slot_tbl_lock); + nfs41_set_target_slotid_locked(tbl, target_highest_slotid); + tbl->d_target_highest_slotid = 0; + tbl->d2_target_highest_slotid = 0; + nfs41_set_max_slotid_locked(tbl, target_highest_slotid); + spin_unlock(&tbl->slot_tbl_lock); +} + +static void nfs41_set_server_slotid_locked(struct nfs4_slot_table *tbl, + u32 highest_slotid) +{ + if (tbl->server_highest_slotid == highest_slotid) + return; + if (tbl->highest_used_slotid > highest_slotid) + return; + /* Deallocate slots */ + nfs4_shrink_slot_table(tbl, highest_slotid + 1); + tbl->server_highest_slotid = highest_slotid; +} + +static s32 nfs41_derivative_target_slotid(s32 s1, s32 s2) +{ + s1 -= s2; + if (s1 == 0) + return 0; + if (s1 < 0) + return (s1 - 1) >> 1; + return (s1 + 1) >> 1; +} + +static int nfs41_sign_s32(s32 s1) +{ + if (s1 > 0) + return 1; + if (s1 < 0) + return -1; + return 0; +} + +static bool nfs41_same_sign_or_zero_s32(s32 s1, s32 s2) +{ + if (!s1 || !s2) + return true; + return nfs41_sign_s32(s1) == nfs41_sign_s32(s2); +} + +/* Try to eliminate outliers by checking for sharp changes in the + * derivatives and second derivatives + */ +static bool nfs41_is_outlier_target_slotid(struct nfs4_slot_table *tbl, + u32 new_target) +{ + s32 d_target, d2_target; + bool ret = true; + + d_target = nfs41_derivative_target_slotid(new_target, + tbl->target_highest_slotid); + d2_target = nfs41_derivative_target_slotid(d_target, + tbl->d_target_highest_slotid); + /* Is first derivative same sign? */ + if (nfs41_same_sign_or_zero_s32(d_target, tbl->d_target_highest_slotid)) + ret = false; + /* Is second derivative same sign? */ + if (nfs41_same_sign_or_zero_s32(d2_target, tbl->d2_target_highest_slotid)) + ret = false; + tbl->d_target_highest_slotid = d_target; + tbl->d2_target_highest_slotid = d2_target; + return ret; +} + +void nfs41_update_target_slotid(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot, + struct nfs4_sequence_res *res) +{ + spin_lock(&tbl->slot_tbl_lock); + if (!nfs41_is_outlier_target_slotid(tbl, res->sr_target_highest_slotid)) + nfs41_set_target_slotid_locked(tbl, res->sr_target_highest_slotid); + if (tbl->generation == slot->generation) + nfs41_set_server_slotid_locked(tbl, res->sr_highest_slotid); + nfs41_set_max_slotid_locked(tbl, res->sr_target_highest_slotid); + spin_unlock(&tbl->slot_tbl_lock); +} + +/* + * Initialize or reset the forechannel and backchannel tables + */ +int nfs4_setup_session_slot_tables(struct nfs4_session *ses) +{ + struct nfs4_slot_table *tbl; + int status; + + dprintk("--> %s\n", __func__); + /* Fore channel */ + tbl = &ses->fc_slot_table; + tbl->session = ses; + status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1); + if (status) /* -ENOMEM */ + return status; + /* Back channel */ + tbl = &ses->bc_slot_table; + tbl->session = ses; + status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0); + if (status && tbl->slots == NULL) + /* Fore and back channel share a connection so get + * both slot tables or neither */ + nfs4_destroy_slot_tables(ses); + return status; +} + +struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) +{ + struct nfs4_session *session; + struct nfs4_slot_table *tbl; + + session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); + if (!session) + return NULL; + + tbl = &session->fc_slot_table; + tbl->highest_used_slotid = NFS4_NO_SLOT; + spin_lock_init(&tbl->slot_tbl_lock); + rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); + init_completion(&tbl->complete); + + tbl = &session->bc_slot_table; + tbl->highest_used_slotid = NFS4_NO_SLOT; + spin_lock_init(&tbl->slot_tbl_lock); + rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); + init_completion(&tbl->complete); + + session->session_state = 1<<NFS4_SESSION_INITING; + + session->clp = clp; + return session; +} + +void nfs4_destroy_session(struct nfs4_session *session) +{ + struct rpc_xprt *xprt; + struct rpc_cred *cred; + + cred = nfs4_get_exchange_id_cred(session->clp); + nfs4_proc_destroy_session(session, cred); + if (cred) + put_rpccred(cred); + + rcu_read_lock(); + xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt); + rcu_read_unlock(); + dprintk("%s Destroy backchannel for xprt %p\n", + __func__, xprt); + xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); + nfs4_destroy_slot_tables(session); + kfree(session); +} + +/* + * With sessions, the client is not marked ready until after a + * successful EXCHANGE_ID and CREATE_SESSION. + * + * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate + * other versions of NFS can be tried. + */ +static int nfs41_check_session_ready(struct nfs_client *clp) +{ + int ret; + + if (clp->cl_cons_state == NFS_CS_SESSION_INITING) { + ret = nfs4_client_recover_expired_lease(clp); + if (ret) + return ret; + } + if (clp->cl_cons_state < NFS_CS_READY) + return -EPROTONOSUPPORT; + smp_rmb(); + return 0; +} + +int nfs4_init_session(struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + struct nfs4_session *session; + unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE; + unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE; + + if (!nfs4_has_session(clp)) + return 0; + + if (server->rsize != 0) + target_max_resp_sz = server->rsize; + target_max_resp_sz += nfs41_maxread_overhead; + + if (server->wsize != 0) + target_max_rqst_sz = server->wsize; + target_max_rqst_sz += nfs41_maxwrite_overhead; + + session = clp->cl_session; + spin_lock(&clp->cl_lock); + if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) { + /* Initialise targets and channel attributes */ + session->fc_target_max_rqst_sz = target_max_rqst_sz; + session->fc_attrs.max_rqst_sz = target_max_rqst_sz; + session->fc_target_max_resp_sz = target_max_resp_sz; + session->fc_attrs.max_resp_sz = target_max_resp_sz; + } else { + /* Just adjust the targets */ + if (target_max_rqst_sz > session->fc_target_max_rqst_sz) { + session->fc_target_max_rqst_sz = target_max_rqst_sz; + set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); + } + if (target_max_resp_sz > session->fc_target_max_resp_sz) { + session->fc_target_max_resp_sz = target_max_resp_sz; + set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); + } + } + spin_unlock(&clp->cl_lock); + + if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) + nfs4_schedule_lease_recovery(clp); + + return nfs41_check_session_ready(clp); +} + +int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time) +{ + struct nfs4_session *session = clp->cl_session; + int ret; + + spin_lock(&clp->cl_lock); + if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) { + /* + * Do not set NFS_CS_CHECK_LEASE_TIME instead set the + * DS lease to be equal to the MDS lease. + */ + clp->cl_lease_time = lease_time; + clp->cl_last_renewal = jiffies; + } + spin_unlock(&clp->cl_lock); + + ret = nfs41_check_session_ready(clp); + if (ret) + return ret; + /* Test for the DS role */ + if (!is_ds_client(clp)) + return -ENODEV; + return 0; +} +EXPORT_SYMBOL_GPL(nfs4_init_ds_session); + + diff --git a/fs/nfs/nfs4session.h b/fs/nfs/nfs4session.h new file mode 100644 index 00000000000..6f3cb39386d --- /dev/null +++ b/fs/nfs/nfs4session.h @@ -0,0 +1,142 @@ +/* + * fs/nfs/nfs4session.h + * + * Copyright (c) 2012 Trond Myklebust <Trond.Myklebust@netapp.com> + * + */ +#ifndef __LINUX_FS_NFS_NFS4SESSION_H +#define __LINUX_FS_NFS_NFS4SESSION_H + +/* maximum number of slots to use */ +#define NFS4_DEF_SLOT_TABLE_SIZE (16U) +#define NFS4_MAX_SLOT_TABLE (1024U) +#define NFS4_NO_SLOT ((u32)-1) + +#if IS_ENABLED(CONFIG_NFS_V4) + +/* Sessions slot seqid */ +struct nfs4_slot { + struct nfs4_slot_table *table; + struct nfs4_slot *next; + unsigned long generation; + u32 slot_nr; + u32 seq_nr; + unsigned int interrupted : 1; +}; + +/* Sessions */ +#define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long)) +struct nfs4_slot_table { + struct nfs4_session *session; /* Parent session */ + struct nfs4_slot *slots; /* seqid per slot */ + unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */ + spinlock_t slot_tbl_lock; + struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */ + u32 max_slots; /* # slots in table */ + u32 max_slotid; /* Max allowed slotid value */ + u32 highest_used_slotid; /* sent to server on each SEQ. + * op for dynamic resizing */ + u32 target_highest_slotid; /* Server max_slot target */ + u32 server_highest_slotid; /* Server highest slotid */ + s32 d_target_highest_slotid; /* Derivative */ + s32 d2_target_highest_slotid; /* 2nd derivative */ + unsigned long generation; /* Generation counter for + target_highest_slotid */ + struct completion complete; +}; + +/* + * Session related parameters + */ +struct nfs4_session { + struct nfs4_sessionid sess_id; + u32 flags; + unsigned long session_state; + u32 hash_alg; + u32 ssv_len; + + /* The fore and back channel */ + struct nfs4_channel_attrs fc_attrs; + struct nfs4_slot_table fc_slot_table; + struct nfs4_channel_attrs bc_attrs; + struct nfs4_slot_table bc_slot_table; + struct nfs_client *clp; + /* Create session arguments */ + unsigned int fc_target_max_rqst_sz; + unsigned int fc_target_max_resp_sz; +}; + +enum nfs4_session_state { + NFS4_SESSION_INITING, + NFS4_SESSION_DRAINING, +}; + +#if defined(CONFIG_NFS_V4_1) +extern struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl); +extern void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot); + +extern void nfs41_set_target_slotid(struct nfs4_slot_table *tbl, + u32 target_highest_slotid); +extern void nfs41_update_target_slotid(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot, + struct nfs4_sequence_res *res); + +extern int nfs4_setup_session_slot_tables(struct nfs4_session *ses); + +extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp); +extern void nfs4_destroy_session(struct nfs4_session *session); +extern int nfs4_init_session(struct nfs_server *server); +extern int nfs4_init_ds_session(struct nfs_client *, unsigned long); + +extern void nfs4_session_drain_complete(struct nfs4_session *session, + struct nfs4_slot_table *tbl); + +static inline bool nfs4_session_draining(struct nfs4_session *session) +{ + return !!test_bit(NFS4_SESSION_DRAINING, &session->session_state); +} + +bool nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl, + struct nfs4_slot *slot); +void nfs41_wake_slot_table(struct nfs4_slot_table *tbl); + +/* + * Determine if sessions are in use. + */ +static inline int nfs4_has_session(const struct nfs_client *clp) +{ + if (clp->cl_session) + return 1; + return 0; +} + +static inline int nfs4_has_persistent_session(const struct nfs_client *clp) +{ + if (nfs4_has_session(clp)) + return (clp->cl_session->flags & SESSION4_PERSIST); + return 0; +} + +#else /* defined(CONFIG_NFS_V4_1) */ + +static inline int nfs4_init_session(struct nfs_server *server) +{ + return 0; +} + +/* + * Determine if sessions are in use. + */ +static inline int nfs4_has_session(const struct nfs_client *clp) +{ + return 0; +} + +static inline int nfs4_has_persistent_session(const struct nfs_client *clp) +{ + return 0; +} + +#endif /* defined(CONFIG_NFS_V4_1) */ +#endif /* IS_ENABLED(CONFIG_NFS_V4) */ +#endif /* __LINUX_FS_NFS_NFS4SESSION_H */ diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index c351e6b3983..9448c579d41 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -57,6 +57,7 @@ #include "callback.h" #include "delegation.h" #include "internal.h" +#include "nfs4session.h" #include "pnfs.h" #include "netns.h" @@ -66,7 +67,6 @@ const nfs4_stateid zero_stateid; static DEFINE_MUTEX(nfs_clid_init_mutex); -static LIST_HEAD(nfs4_clientid_list); int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) { @@ -254,24 +254,27 @@ static void nfs4_end_drain_session(struct nfs_client *clp) { struct nfs4_session *ses = clp->cl_session; struct nfs4_slot_table *tbl; - int max_slots; if (ses == NULL) return; tbl = &ses->fc_slot_table; if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { spin_lock(&tbl->slot_tbl_lock); - max_slots = tbl->max_slots; - while (max_slots--) { - if (rpc_wake_up_first(&tbl->slot_tbl_waitq, - nfs4_set_task_privileged, - NULL) == NULL) - break; - } + nfs41_wake_slot_table(tbl); spin_unlock(&tbl->slot_tbl_lock); } } +/* + * Signal state manager thread if session fore channel is drained + */ +void nfs4_session_drain_complete(struct nfs4_session *session, + struct nfs4_slot_table *tbl) +{ + if (nfs4_session_draining(session)) + complete(&tbl->complete); +} + static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) { spin_lock(&tbl->slot_tbl_lock); @@ -303,7 +306,6 @@ static void nfs41_finish_session_reset(struct nfs_client *clp) clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); /* create_session negotiated new slot table */ - clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); nfs41_setup_state_renewal(clp); } @@ -1086,7 +1088,6 @@ void nfs_free_seqid(struct nfs_seqid *seqid) */ static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) { - BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); switch (status) { case 0: break; @@ -1209,6 +1210,40 @@ void nfs4_schedule_lease_recovery(struct nfs_client *clp) } EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); +int nfs4_wait_clnt_recover(struct nfs_client *clp) +{ + int res; + + might_sleep(); + + res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, + nfs_wait_bit_killable, TASK_KILLABLE); + if (res) + return res; + + if (clp->cl_cons_state < 0) + return clp->cl_cons_state; + return 0; +} + +int nfs4_client_recover_expired_lease(struct nfs_client *clp) +{ + unsigned int loop; + int ret; + + for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { + ret = nfs4_wait_clnt_recover(clp); + if (ret != 0) + break; + if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && + !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) + break; + nfs4_schedule_state_manager(clp); + ret = -EIO; + } + return ret; +} + /* * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN * @clp: client to process @@ -1401,14 +1436,6 @@ restart: /* Mark the file as being 'closed' */ state->state = 0; break; - case -EKEYEXPIRED: - /* - * User RPCSEC_GSS context has expired. - * We cannot recover this stateid now, so - * skip it and allow recovery thread to - * proceed. - */ - break; case -NFS4ERR_ADMIN_REVOKED: case -NFS4ERR_STALE_STATEID: case -NFS4ERR_BAD_STATEID: @@ -1561,14 +1588,6 @@ static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); } -static void nfs4_warn_keyexpired(const char *s) -{ - printk_ratelimited(KERN_WARNING "Error: state manager" - " encountered RPCSEC_GSS session" - " expired against NFSv4 server %s.\n", - s); -} - static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) { switch (error) { @@ -1602,10 +1621,6 @@ static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); break; - case -EKEYEXPIRED: - /* Nothing we can do */ - nfs4_warn_keyexpired(clp->cl_hostname); - break; default: dprintk("%s: failed to handle error %d for server %s\n", __func__, error, clp->cl_hostname); @@ -1722,8 +1737,6 @@ static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) dprintk("%s: exit with error %d for server %s\n", __func__, -EPROTONOSUPPORT, clp->cl_hostname); return -EPROTONOSUPPORT; - case -EKEYEXPIRED: - nfs4_warn_keyexpired(clp->cl_hostname); case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery * in nfs4_exchange_id */ default: @@ -1876,7 +1889,6 @@ again: break; case -EKEYEXPIRED: - nfs4_warn_keyexpired(clp->cl_hostname); case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery * in nfs4_exchange_id */ status = -EKEYEXPIRED; @@ -1907,14 +1919,23 @@ void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) } EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); -void nfs41_handle_recall_slot(struct nfs_client *clp) +static void nfs41_ping_server(struct nfs_client *clp) { - set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); - dprintk("%s: scheduling slot recall for server %s\n", __func__, - clp->cl_hostname); + /* Use CHECK_LEASE to ping the server with a SEQUENCE */ + set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); nfs4_schedule_state_manager(clp); } +void nfs41_server_notify_target_slotid_update(struct nfs_client *clp) +{ + nfs41_ping_server(clp); +} + +void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp) +{ + nfs41_ping_server(clp); +} + static void nfs4_reset_all_state(struct nfs_client *clp) { if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { @@ -2024,35 +2045,6 @@ out: return status; } -static int nfs4_recall_slot(struct nfs_client *clp) -{ - struct nfs4_slot_table *fc_tbl; - struct nfs4_slot *new, *old; - int i; - - if (!nfs4_has_session(clp)) - return 0; - nfs4_begin_drain_session(clp); - fc_tbl = &clp->cl_session->fc_slot_table; - new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), - GFP_NOFS); - if (!new) - return -ENOMEM; - - spin_lock(&fc_tbl->slot_tbl_lock); - for (i = 0; i < fc_tbl->target_max_slots; i++) - new[i].seq_nr = fc_tbl->slots[i].seq_nr; - old = fc_tbl->slots; - fc_tbl->slots = new; - fc_tbl->max_slots = fc_tbl->target_max_slots; - fc_tbl->target_max_slots = 0; - clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots; - spin_unlock(&fc_tbl->slot_tbl_lock); - - kfree(old); - return 0; -} - static int nfs4_bind_conn_to_session(struct nfs_client *clp) { struct rpc_cred *cred; @@ -2083,7 +2075,6 @@ static int nfs4_bind_conn_to_session(struct nfs_client *clp) #else /* CONFIG_NFS_V4_1 */ static int nfs4_reset_session(struct nfs_client *clp) { return 0; } static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } -static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } static int nfs4_bind_conn_to_session(struct nfs_client *clp) { @@ -2115,15 +2106,6 @@ static void nfs4_state_manager(struct nfs_client *clp) continue; } - if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { - section = "check lease"; - status = nfs4_check_lease(clp); - if (status < 0) - goto out_error; - if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) - continue; - } - /* Initialize or reset the session */ if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { section = "reset session"; @@ -2144,10 +2126,9 @@ static void nfs4_state_manager(struct nfs_client *clp) continue; } - /* Recall session slots */ - if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state)) { - section = "recall slot"; - status = nfs4_recall_slot(clp); + if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { + section = "check lease"; + status = nfs4_check_lease(clp); if (status < 0) goto out_error; continue; diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index bd61221ad2c..84d2e9e2f31 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -51,6 +51,7 @@ static const struct super_operations nfs4_sops = { .alloc_inode = nfs_alloc_inode, .destroy_inode = nfs_destroy_inode, .write_inode = nfs4_write_inode, + .drop_inode = nfs_drop_inode, .put_super = nfs_put_super, .statfs = nfs_statfs, .evict_inode = nfs4_evict_inode, diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 40836ee5dc3..26b14392043 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -56,6 +56,7 @@ #include "nfs4_fs.h" #include "internal.h" +#include "nfs4session.h" #include "pnfs.h" #include "netns.h" @@ -270,6 +271,8 @@ static int nfs4_stat_to_errno(int); #if defined(CONFIG_NFS_V4_1) #define NFS4_MAX_MACHINE_NAME_LEN (64) +#define IMPL_NAME_LIMIT (sizeof(utsname()->sysname) + sizeof(utsname()->release) + \ + sizeof(utsname()->version) + sizeof(utsname()->machine) + 8) #define encode_exchange_id_maxsz (op_encode_hdr_maxsz + \ encode_verifier_maxsz + \ @@ -282,7 +285,7 @@ static int nfs4_stat_to_errno(int); 1 /* nii_domain */ + \ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ 1 /* nii_name */ + \ - XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \ + XDR_QUADLEN(IMPL_NAME_LIMIT) + \ 3 /* nii_date */) #define decode_exchange_id_maxsz (op_decode_hdr_maxsz + \ 2 /* eir_clientid */ + \ @@ -936,7 +939,7 @@ static void encode_compound_hdr(struct xdr_stream *xdr, * but this is not required as a MUST for the server to do so. */ hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen; - BUG_ON(hdr->taglen > NFS4_MAXTAGLEN); + WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN); encode_string(xdr, hdr->taglen, hdr->tag); p = reserve_space(xdr, 8); *p++ = cpu_to_be32(hdr->minorversion); @@ -955,7 +958,7 @@ static void encode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 op, static void encode_nops(struct compound_hdr *hdr) { - BUG_ON(hdr->nops > NFS4_MAX_OPS); + WARN_ON_ONCE(hdr->nops > NFS4_MAX_OPS); *hdr->nops_p = htonl(hdr->nops); } @@ -1403,7 +1406,6 @@ static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *a *p = cpu_to_be32(NFS4_OPEN_NOCREATE); break; default: - BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL); *p = cpu_to_be32(NFS4_OPEN_CREATE); encode_createmode(xdr, arg); } @@ -1621,7 +1623,6 @@ encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compoun p = reserve_space(xdr, 2*4); *p++ = cpu_to_be32(1); *p = cpu_to_be32(FATTR4_WORD0_ACL); - BUG_ON(arg->acl_len % 4); p = reserve_space(xdr, 4); *p = cpu_to_be32(arg->acl_len); xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len); @@ -1713,7 +1714,7 @@ static void encode_exchange_id(struct xdr_stream *xdr, struct compound_hdr *hdr) { __be32 *p; - char impl_name[NFS4_OPAQUE_LIMIT]; + char impl_name[IMPL_NAME_LIMIT]; int len = 0; encode_op_hdr(xdr, OP_EXCHANGE_ID, decode_exchange_id_maxsz, hdr); @@ -1728,7 +1729,7 @@ static void encode_exchange_id(struct xdr_stream *xdr, if (send_implementation_id && sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) > 1 && sizeof(CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN) - <= NFS4_OPAQUE_LIMIT + 1) + <= sizeof(impl_name) + 1) len = snprintf(impl_name, sizeof(impl_name), "%s %s %s %s", utsname()->sysname, utsname()->release, utsname()->version, utsname()->machine); @@ -1835,18 +1836,16 @@ static void encode_sequence(struct xdr_stream *xdr, struct compound_hdr *hdr) { #if defined(CONFIG_NFS_V4_1) - struct nfs4_session *session = args->sa_session; + struct nfs4_session *session; struct nfs4_slot_table *tp; - struct nfs4_slot *slot; + struct nfs4_slot *slot = args->sa_slot; __be32 *p; - if (!session) + if (slot == NULL) return; - tp = &session->fc_slot_table; - - WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE); - slot = tp->slots + args->sa_slotid; + tp = slot->table; + session = tp->session; encode_op_hdr(xdr, OP_SEQUENCE, decode_sequence_maxsz, hdr); @@ -1860,12 +1859,12 @@ static void encode_sequence(struct xdr_stream *xdr, ((u32 *)session->sess_id.data)[1], ((u32 *)session->sess_id.data)[2], ((u32 *)session->sess_id.data)[3], - slot->seq_nr, args->sa_slotid, + slot->seq_nr, slot->slot_nr, tp->highest_used_slotid, args->sa_cache_this); p = reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 16); p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN); *p++ = cpu_to_be32(slot->seq_nr); - *p++ = cpu_to_be32(args->sa_slotid); + *p++ = cpu_to_be32(slot->slot_nr); *p++ = cpu_to_be32(tp->highest_used_slotid); *p = cpu_to_be32(args->sa_cache_this); #endif /* CONFIG_NFS_V4_1 */ @@ -2027,8 +2026,9 @@ static void encode_free_stateid(struct xdr_stream *xdr, static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args) { #if defined(CONFIG_NFS_V4_1) - if (args->sa_session) - return args->sa_session->clp->cl_mvops->minor_version; + + if (args->sa_slot) + return args->sa_slot->table->session->clp->cl_mvops->minor_version; #endif /* CONFIG_NFS_V4_1 */ return 0; } @@ -5509,12 +5509,13 @@ static int decode_sequence(struct xdr_stream *xdr, struct rpc_rqst *rqstp) { #if defined(CONFIG_NFS_V4_1) + struct nfs4_session *session; struct nfs4_sessionid id; u32 dummy; int status; __be32 *p; - if (!res->sr_session) + if (res->sr_slot == NULL) return 0; status = decode_op_hdr(xdr, OP_SEQUENCE); @@ -5528,8 +5529,9 @@ static int decode_sequence(struct xdr_stream *xdr, * sequence number, the server is looney tunes. */ status = -EREMOTEIO; + session = res->sr_slot->table->session; - if (memcmp(id.data, res->sr_session->sess_id.data, + if (memcmp(id.data, session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { dprintk("%s Invalid session id\n", __func__); goto out_err; @@ -5547,14 +5549,14 @@ static int decode_sequence(struct xdr_stream *xdr, } /* slot id */ dummy = be32_to_cpup(p++); - if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) { + if (dummy != res->sr_slot->slot_nr) { dprintk("%s Invalid slot id\n", __func__); goto out_err; } - /* highest slot id - currently not processed */ - dummy = be32_to_cpup(p++); - /* target highest slot id - currently not processed */ - dummy = be32_to_cpup(p++); + /* highest slot id */ + res->sr_highest_slotid = be32_to_cpup(p++); + /* target highest slot id */ + res->sr_target_highest_slotid = be32_to_cpup(p++); /* result flags */ res->sr_status_flags = be32_to_cpup(p); status = 0; diff --git a/fs/nfs/objlayout/objlayout.c b/fs/nfs/objlayout/objlayout.c index 87461354530..a9ebd817278 100644 --- a/fs/nfs/objlayout/objlayout.c +++ b/fs/nfs/objlayout/objlayout.c @@ -148,17 +148,6 @@ end_offset(u64 start, u64 len) return end >= start ? end : NFS4_MAX_UINT64; } -/* last octet in a range */ -static inline u64 -last_byte_offset(u64 start, u64 len) -{ - u64 end; - - BUG_ON(!len); - end = start + len; - return end > start ? end - 1 : NFS4_MAX_UINT64; -} - static void _fix_verify_io_params(struct pnfs_layout_segment *lseg, struct page ***p_pages, unsigned *p_pgbase, u64 offset, unsigned long count) diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index fe624c91bd0..d00260b0810 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -254,7 +254,7 @@ static void pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) { lo->plh_retry_timestamp = jiffies; - if (test_and_set_bit(fail_bit, &lo->plh_flags)) + if (!test_and_set_bit(fail_bit, &lo->plh_flags)) atomic_inc(&lo->plh_refcount); } @@ -369,17 +369,6 @@ end_offset(u64 start, u64 len) return end >= start ? end : NFS4_MAX_UINT64; } -/* last octet in a range */ -static inline u64 -last_byte_offset(u64 start, u64 len) -{ - u64 end; - - BUG_ON(!len); - end = start + len; - return end > start ? end - 1 : NFS4_MAX_UINT64; -} - /* * is l2 fully contained in l1? * start1 end1 @@ -645,7 +634,6 @@ send_layoutget(struct pnfs_layout_hdr *lo, dprintk("--> %s\n", __func__); - BUG_ON(ctx == NULL); lgp = kzalloc(sizeof(*lgp), gfp_flags); if (lgp == NULL) return NULL; @@ -925,8 +913,8 @@ pnfs_find_alloc_layout(struct inode *ino, if (likely(nfsi->layout == NULL)) { /* Won the race? */ nfsi->layout = new; return new; - } - pnfs_free_layout_hdr(new); + } else if (new != NULL) + pnfs_free_layout_hdr(new); out_existing: pnfs_get_layout_hdr(nfsi->layout); return nfsi->layout; @@ -1126,7 +1114,6 @@ pnfs_update_layout(struct inode *ino, * chance of a CB_LAYOUTRECALL(FILE) coming in. */ spin_lock(&clp->cl_lock); - BUG_ON(!list_empty(&lo->plh_layouts)); list_add_tail(&lo->plh_layouts, &server->layouts); spin_unlock(&clp->cl_lock); } @@ -1222,7 +1209,7 @@ pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *r { u64 rd_size = req->wb_bytes; - BUG_ON(pgio->pg_lseg != NULL); + WARN_ON_ONCE(pgio->pg_lseg != NULL); if (req->wb_offset != req->wb_pgbase) { nfs_pageio_reset_read_mds(pgio); @@ -1251,7 +1238,7 @@ void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req, u64 wb_size) { - BUG_ON(pgio->pg_lseg != NULL); + WARN_ON_ONCE(pgio->pg_lseg != NULL); if (req->wb_offset != req->wb_pgbase) { nfs_pageio_reset_write_mds(pgio); diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 50a88c3546e..f084dac948e 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -47,39 +47,6 @@ #define NFSDBG_FACILITY NFSDBG_PROC /* - * wrapper to handle the -EKEYEXPIRED error message. This should generally - * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't - * support the NFSERR_JUKEBOX error code, but we handle this situation in the - * same way that we handle that error with NFSv3. - */ -static int -nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) -{ - int res; - do { - res = rpc_call_sync(clnt, msg, flags); - if (res != -EKEYEXPIRED) - break; - freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); - res = -ERESTARTSYS; - } while (!fatal_signal_pending(current)); - return res; -} - -#define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags) - -static int -nfs_async_handle_expired_key(struct rpc_task *task) -{ - if (task->tk_status != -EKEYEXPIRED) - return 0; - task->tk_status = 0; - rpc_restart_call(task); - rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); - return 1; -} - -/* * Bare-bones access to getattr: this is for nfs_read_super. */ static int @@ -364,8 +331,6 @@ static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlink static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) { - if (nfs_async_handle_expired_key(task)) - return 0; nfs_mark_for_revalidate(dir); return 1; } @@ -385,8 +350,6 @@ static int nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, struct inode *new_dir) { - if (nfs_async_handle_expired_key(task)) - return 0; nfs_mark_for_revalidate(old_dir); nfs_mark_for_revalidate(new_dir); return 1; @@ -642,9 +605,6 @@ static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) { struct inode *inode = data->header->inode; - if (nfs_async_handle_expired_key(task)) - return -EAGAIN; - nfs_invalidate_atime(inode); if (task->tk_status >= 0) { nfs_refresh_inode(inode, data->res.fattr); @@ -671,9 +631,6 @@ static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) { struct inode *inode = data->header->inode; - if (nfs_async_handle_expired_key(task)) - return -EAGAIN; - if (task->tk_status >= 0) nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); return 0; diff --git a/fs/nfs/read.c b/fs/nfs/read.c index b6bdb18e892..a5e5d9899d5 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -91,12 +91,16 @@ void nfs_readdata_release(struct nfs_read_data *rdata) put_nfs_open_context(rdata->args.context); if (rdata->pages.pagevec != rdata->pages.page_array) kfree(rdata->pages.pagevec); - if (rdata != &read_header->rpc_data) - kfree(rdata); - else + if (rdata == &read_header->rpc_data) { rdata->header = NULL; + rdata = NULL; + } if (atomic_dec_and_test(&hdr->refcnt)) hdr->completion_ops->completion(hdr); + /* Note: we only free the rpc_task after callbacks are done. + * See the comment in rpc_free_task() for why + */ + kfree(rdata); } EXPORT_SYMBOL_GPL(nfs_readdata_release); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index e831bce4976..2e7e8c878e5 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -54,6 +54,7 @@ #include <linux/parser.h> #include <linux/nsproxy.h> #include <linux/rcupdate.h> +#include <linux/kthread.h> #include <asm/uaccess.h> @@ -63,6 +64,7 @@ #include "iostat.h" #include "internal.h" #include "fscache.h" +#include "nfs4session.h" #include "pnfs.h" #include "nfs.h" @@ -306,6 +308,7 @@ const struct super_operations nfs_sops = { .alloc_inode = nfs_alloc_inode, .destroy_inode = nfs_destroy_inode, .write_inode = nfs_write_inode, + .drop_inode = nfs_drop_inode, .put_super = nfs_put_super, .statfs = nfs_statfs, .evict_inode = nfs_evict_inode, @@ -415,6 +418,54 @@ void nfs_sb_deactive(struct super_block *sb) } EXPORT_SYMBOL_GPL(nfs_sb_deactive); +static int nfs_deactivate_super_async_work(void *ptr) +{ + struct super_block *sb = ptr; + + deactivate_super(sb); + module_put_and_exit(0); + return 0; +} + +/* + * same effect as deactivate_super, but will do final unmount in kthread + * context + */ +static void nfs_deactivate_super_async(struct super_block *sb) +{ + struct task_struct *task; + char buf[INET6_ADDRSTRLEN + 1]; + struct nfs_server *server = NFS_SB(sb); + struct nfs_client *clp = server->nfs_client; + + if (!atomic_add_unless(&sb->s_active, -1, 1)) { + rcu_read_lock(); + snprintf(buf, sizeof(buf), + rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + rcu_read_unlock(); + + __module_get(THIS_MODULE); + task = kthread_run(nfs_deactivate_super_async_work, sb, + "%s-deactivate-super", buf); + if (IS_ERR(task)) { + pr_err("%s: kthread_run: %ld\n", + __func__, PTR_ERR(task)); + /* make synchronous call and hope for the best */ + deactivate_super(sb); + module_put(THIS_MODULE); + } + } +} + +void nfs_sb_deactive_async(struct super_block *sb) +{ + struct nfs_server *server = NFS_SB(sb); + + if (atomic_dec_and_test(&server->active)) + nfs_deactivate_super_async(sb); +} +EXPORT_SYMBOL_GPL(nfs_sb_deactive_async); + /* * Deliver file system statistics to userspace */ @@ -771,7 +822,7 @@ int nfs_show_devname(struct seq_file *m, struct dentry *root) int err = 0; if (!page) return -ENOMEM; - devname = nfs_path(&dummy, root, page, PAGE_SIZE); + devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0); if (IS_ERR(devname)) err = PTR_ERR(devname); else @@ -1101,7 +1152,7 @@ static int nfs_get_option_str(substring_t args[], char **option) { kfree(*option); *option = match_strdup(args); - return !option; + return !*option; } static int nfs_get_option_ul(substring_t args[], unsigned long *option) @@ -2324,19 +2375,30 @@ static void nfs_get_cache_cookie(struct super_block *sb, struct nfs_parsed_mount_data *parsed, struct nfs_clone_mount *cloned) { + struct nfs_server *nfss = NFS_SB(sb); char *uniq = NULL; int ulen = 0; - if (parsed && parsed->fscache_uniq) { - uniq = parsed->fscache_uniq; - ulen = strlen(parsed->fscache_uniq); + nfss->fscache_key = NULL; + nfss->fscache = NULL; + + if (parsed) { + if (!(parsed->options & NFS_OPTION_FSCACHE)) + return; + if (parsed->fscache_uniq) { + uniq = parsed->fscache_uniq; + ulen = strlen(parsed->fscache_uniq); + } } else if (cloned) { struct nfs_server *mnt_s = NFS_SB(cloned->sb); + if (!(mnt_s->options & NFS_OPTION_FSCACHE)) + return; if (mnt_s->fscache_key) { uniq = mnt_s->fscache_key->key.uniquifier; ulen = mnt_s->fscache_key->key.uniq_len; }; - } + } else + return; nfs_fscache_get_super_cookie(sb, uniq, ulen); } diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c index 13cea637eff..3f79c77153b 100644 --- a/fs/nfs/unlink.c +++ b/fs/nfs/unlink.c @@ -95,7 +95,7 @@ static void nfs_async_unlink_release(void *calldata) nfs_dec_sillycount(data->dir); nfs_free_unlinkdata(data); - nfs_sb_deactive(sb); + nfs_sb_deactive_async(sb); } static void nfs_unlink_prepare(struct rpc_task *task, void *calldata) diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 9347ab7c957..c483cc50b82 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -126,12 +126,16 @@ void nfs_writedata_release(struct nfs_write_data *wdata) put_nfs_open_context(wdata->args.context); if (wdata->pages.pagevec != wdata->pages.page_array) kfree(wdata->pages.pagevec); - if (wdata != &write_header->rpc_data) - kfree(wdata); - else + if (wdata == &write_header->rpc_data) { wdata->header = NULL; + wdata = NULL; + } if (atomic_dec_and_test(&hdr->refcnt)) hdr->completion_ops->completion(hdr); + /* Note: we only free the rpc_task after callbacks are done. + * See the comment in rpc_free_task() for why + */ + kfree(wdata); } EXPORT_SYMBOL_GPL(nfs_writedata_release); @@ -202,7 +206,6 @@ out: /* A writeback failed: mark the page as bad, and invalidate the page cache */ static void nfs_set_pageerror(struct page *page) { - SetPageError(page); nfs_zap_mapping(page_file_mapping(page)->host, page_file_mapping(page)); } @@ -239,21 +242,18 @@ int nfs_congestion_kb; #define NFS_CONGESTION_OFF_THRESH \ (NFS_CONGESTION_ON_THRESH - (NFS_CONGESTION_ON_THRESH >> 2)) -static int nfs_set_page_writeback(struct page *page) +static void nfs_set_page_writeback(struct page *page) { + struct nfs_server *nfss = NFS_SERVER(page_file_mapping(page)->host); int ret = test_set_page_writeback(page); - if (!ret) { - struct inode *inode = page_file_mapping(page)->host; - struct nfs_server *nfss = NFS_SERVER(inode); + WARN_ON_ONCE(ret != 0); - if (atomic_long_inc_return(&nfss->writeback) > - NFS_CONGESTION_ON_THRESH) { - set_bdi_congested(&nfss->backing_dev_info, - BLK_RW_ASYNC); - } + if (atomic_long_inc_return(&nfss->writeback) > + NFS_CONGESTION_ON_THRESH) { + set_bdi_congested(&nfss->backing_dev_info, + BLK_RW_ASYNC); } - return ret; } static void nfs_end_page_writeback(struct page *page) @@ -315,10 +315,10 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio, if (IS_ERR(req)) goto out; - ret = nfs_set_page_writeback(page); - BUG_ON(ret != 0); - BUG_ON(test_bit(PG_CLEAN, &req->wb_flags)); + nfs_set_page_writeback(page); + WARN_ON_ONCE(test_bit(PG_CLEAN, &req->wb_flags)); + ret = 0; if (!nfs_pageio_add_request(pgio, req)) { nfs_redirty_request(req); ret = pgio->pg_error; @@ -451,8 +451,6 @@ static void nfs_inode_remove_request(struct nfs_page *req) struct inode *inode = req->wb_context->dentry->d_inode; struct nfs_inode *nfsi = NFS_I(inode); - BUG_ON (!NFS_WBACK_BUSY(req)); - spin_lock(&inode->i_lock); if (likely(!PageSwapCache(req->wb_page))) { set_page_private(req->wb_page, 0); @@ -884,7 +882,7 @@ static bool nfs_write_pageuptodate(struct page *page, struct inode *inode) { if (nfs_have_delegated_attributes(inode)) goto out; - if (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) + if (NFS_I(inode)->cache_validity & (NFS_INO_INVALID_DATA|NFS_INO_REVAL_PAGECACHE)) return false; out: return PageUptodate(page) != 0; @@ -1727,7 +1725,6 @@ int nfs_wb_page_cancel(struct inode *inode, struct page *page) struct nfs_page *req; int ret = 0; - BUG_ON(!PageLocked(page)); for (;;) { wait_on_page_writeback(page); req = nfs_page_find_request(page); @@ -1801,7 +1798,8 @@ int nfs_migrate_page(struct address_space *mapping, struct page *newpage, if (PagePrivate(page)) return -EBUSY; - nfs_fscache_release_page(page, GFP_KERNEL); + if (!nfs_fscache_release_page(page, GFP_KERNEL)) + return -EBUSY; return migrate_page(mapping, newpage, page, mode); } @@ -1829,7 +1827,7 @@ int __init nfs_init_writepagecache(void) goto out_destroy_write_mempool; nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT, - nfs_wdata_cachep); + nfs_cdata_cachep); if (nfs_commit_mempool == NULL) goto out_destroy_commit_cache; diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c index e6c38159622..e761ee95617 100644 --- a/fs/nfsd/fault_inject.c +++ b/fs/nfsd/fault_inject.c @@ -8,61 +8,144 @@ #include <linux/fs.h> #include <linux/debugfs.h> #include <linux/module.h> +#include <linux/nsproxy.h> +#include <linux/sunrpc/clnt.h> +#include <asm/uaccess.h> #include "state.h" -#include "fault_inject.h" +#include "netns.h" struct nfsd_fault_inject_op { char *file; - void (*func)(u64); + u64 (*forget)(struct nfs4_client *, u64); + u64 (*print)(struct nfs4_client *, u64); }; static struct nfsd_fault_inject_op inject_ops[] = { { .file = "forget_clients", - .func = nfsd_forget_clients, + .forget = nfsd_forget_client, + .print = nfsd_print_client, }, { .file = "forget_locks", - .func = nfsd_forget_locks, + .forget = nfsd_forget_client_locks, + .print = nfsd_print_client_locks, }, { .file = "forget_openowners", - .func = nfsd_forget_openowners, + .forget = nfsd_forget_client_openowners, + .print = nfsd_print_client_openowners, }, { .file = "forget_delegations", - .func = nfsd_forget_delegations, + .forget = nfsd_forget_client_delegations, + .print = nfsd_print_client_delegations, }, { .file = "recall_delegations", - .func = nfsd_recall_delegations, + .forget = nfsd_recall_client_delegations, + .print = nfsd_print_client_delegations, }, }; static long int NUM_INJECT_OPS = sizeof(inject_ops) / sizeof(struct nfsd_fault_inject_op); static struct dentry *debug_dir; -static int nfsd_inject_set(void *op_ptr, u64 val) +static void nfsd_inject_set(struct nfsd_fault_inject_op *op, u64 val) { - struct nfsd_fault_inject_op *op = op_ptr; + u64 count = 0; if (val == 0) printk(KERN_INFO "NFSD Fault Injection: %s (all)", op->file); else printk(KERN_INFO "NFSD Fault Injection: %s (n = %llu)", op->file, val); - op->func(val); - return 0; + nfs4_lock_state(); + count = nfsd_for_n_state(val, op->forget); + nfs4_unlock_state(); + printk(KERN_INFO "NFSD: %s: found %llu", op->file, count); } -static int nfsd_inject_get(void *data, u64 *val) +static void nfsd_inject_set_client(struct nfsd_fault_inject_op *op, + struct sockaddr_storage *addr, + size_t addr_size) { - *val = 0; - return 0; + char buf[INET6_ADDRSTRLEN]; + struct nfs4_client *clp; + u64 count; + + nfs4_lock_state(); + clp = nfsd_find_client(addr, addr_size); + if (clp) { + count = op->forget(clp, 0); + rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); + printk(KERN_INFO "NFSD [%s]: Client %s had %llu state object(s)\n", op->file, buf, count); + } + nfs4_unlock_state(); +} + +static void nfsd_inject_get(struct nfsd_fault_inject_op *op, u64 *val) +{ + nfs4_lock_state(); + *val = nfsd_for_n_state(0, op->print); + nfs4_unlock_state(); } -DEFINE_SIMPLE_ATTRIBUTE(fops_nfsd, nfsd_inject_get, nfsd_inject_set, "%llu\n"); +static ssize_t fault_inject_read(struct file *file, char __user *buf, + size_t len, loff_t *ppos) +{ + static u64 val; + char read_buf[25]; + size_t size, ret; + loff_t pos = *ppos; + + if (!pos) + nfsd_inject_get(file->f_dentry->d_inode->i_private, &val); + size = scnprintf(read_buf, sizeof(read_buf), "%llu\n", val); + + if (pos < 0) + return -EINVAL; + if (pos >= size || !len) + return 0; + if (len > size - pos) + len = size - pos; + ret = copy_to_user(buf, read_buf + pos, len); + if (ret == len) + return -EFAULT; + len -= ret; + *ppos = pos + len; + return len; +} + +static ssize_t fault_inject_write(struct file *file, const char __user *buf, + size_t len, loff_t *ppos) +{ + char write_buf[INET6_ADDRSTRLEN]; + size_t size = min(sizeof(write_buf) - 1, len); + struct net *net = current->nsproxy->net_ns; + struct sockaddr_storage sa; + u64 val; + + if (copy_from_user(write_buf, buf, size)) + return -EFAULT; + write_buf[size] = '\0'; + + size = rpc_pton(net, write_buf, size, (struct sockaddr *)&sa, sizeof(sa)); + if (size > 0) + nfsd_inject_set_client(file->f_dentry->d_inode->i_private, &sa, size); + else { + val = simple_strtoll(write_buf, NULL, 0); + nfsd_inject_set(file->f_dentry->d_inode->i_private, val); + } + return len; /* on success, claim we got the whole input */ +} + +static const struct file_operations fops_nfsd = { + .owner = THIS_MODULE, + .read = fault_inject_read, + .write = fault_inject_write, +}; void nfsd_fault_inject_cleanup(void) { diff --git a/fs/nfsd/fault_inject.h b/fs/nfsd/fault_inject.h deleted file mode 100644 index 90bd0570956..00000000000 --- a/fs/nfsd/fault_inject.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com> - * - * Function definitions for fault injection - */ - -#ifndef LINUX_NFSD_FAULT_INJECT_H -#define LINUX_NFSD_FAULT_INJECT_H - -#ifdef CONFIG_NFSD_FAULT_INJECTION -int nfsd_fault_inject_init(void); -void nfsd_fault_inject_cleanup(void); -void nfsd_forget_clients(u64); -void nfsd_forget_locks(u64); -void nfsd_forget_openowners(u64); -void nfsd_forget_delegations(u64); -void nfsd_recall_delegations(u64); -#else /* CONFIG_NFSD_FAULT_INJECTION */ -static inline int nfsd_fault_inject_init(void) { return 0; } -static inline void nfsd_fault_inject_cleanup(void) {} -static inline void nfsd_forget_clients(u64 num) {} -static inline void nfsd_forget_locks(u64 num) {} -static inline void nfsd_forget_openowners(u64 num) {} -static inline void nfsd_forget_delegations(u64 num) {} -static inline void nfsd_recall_delegations(u64 num) {} -#endif /* CONFIG_NFSD_FAULT_INJECTION */ - -#endif /* LINUX_NFSD_FAULT_INJECT_H */ diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index 65c2431ea32..1051bebff1b 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -24,7 +24,18 @@ #include <net/net_namespace.h> #include <net/netns/generic.h> +/* Hash tables for nfs4_clientid state */ +#define CLIENT_HASH_BITS 4 +#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) +#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) + +#define LOCKOWNER_INO_HASH_BITS 8 +#define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) + +#define SESSION_HASH_SIZE 512 + struct cld_net; +struct nfsd4_client_tracking_ops; struct nfsd_net { struct cld_net *cld_net; @@ -38,7 +49,62 @@ struct nfsd_net { struct lock_manager nfsd4_manager; bool grace_ended; time_t boot_time; + + /* + * reclaim_str_hashtbl[] holds known client info from previous reset/reboot + * used in reboot/reset lease grace period processing + * + * conf_id_hashtbl[], and conf_name_tree hold confirmed + * setclientid_confirmed info. + * + * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed + * setclientid info. + */ + struct list_head *reclaim_str_hashtbl; + int reclaim_str_hashtbl_size; + struct list_head *conf_id_hashtbl; + struct rb_root conf_name_tree; + struct list_head *unconf_id_hashtbl; + struct rb_root unconf_name_tree; + struct list_head *ownerstr_hashtbl; + struct list_head *lockowner_ino_hashtbl; + struct list_head *sessionid_hashtbl; + /* + * client_lru holds client queue ordered by nfs4_client.cl_time + * for lease renewal. + * + * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time + * for last close replay. + * + * All of the above fields are protected by the client_mutex. + */ + struct list_head client_lru; + struct list_head close_lru; + + struct delayed_work laundromat_work; + + /* client_lock protects the client lru list and session hash table */ + spinlock_t client_lock; + + struct file *rec_file; + bool in_grace; + struct nfsd4_client_tracking_ops *client_tracking_ops; + + time_t nfsd4_lease; + time_t nfsd4_grace; + + bool nfsd_net_up; + + /* + * Time of server startup + */ + struct timeval nfssvc_boot; + + struct svc_serv *nfsd_serv; }; +/* Simple check to find out if a given net was properly initialized */ +#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl) + extern int nfsd_net_id; #endif /* __NFSD_NETNS_H__ */ diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c index b314888825d..9170861c804 100644 --- a/fs/nfsd/nfs2acl.c +++ b/fs/nfsd/nfs2acl.c @@ -253,7 +253,7 @@ static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, (resp->mask & NFS_ACL) ? resp->acl_access : NULL, (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); while (w > 0) { - if (!rqstp->rq_respages[rqstp->rq_resused++]) + if (!*(rqstp->rq_next_page++)) return 0; w -= PAGE_SIZE; } diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c index a596e9d987e..9cbc1a841f8 100644 --- a/fs/nfsd/nfs3acl.c +++ b/fs/nfsd/nfs3acl.c @@ -184,7 +184,7 @@ static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, (resp->mask & NFS_ACL) ? resp->acl_access : NULL, (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); while (w > 0) { - if (!rqstp->rq_respages[rqstp->rq_resused++]) + if (!*(rqstp->rq_next_page++)) return 0; w -= PAGE_SIZE; } diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index 97d90d1c860..1fc02dfdc5c 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -460,7 +460,7 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp, __be32 nfserr; int count = 0; loff_t offset; - int i; + struct page **p; caddr_t page_addr = NULL; dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", @@ -484,8 +484,8 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp, &resp->common, nfs3svc_encode_entry_plus); memcpy(resp->verf, argp->verf, 8); - for (i=1; i<rqstp->rq_resused ; i++) { - page_addr = page_address(rqstp->rq_respages[i]); + for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) { + page_addr = page_address(*p); if (((caddr_t)resp->buffer >= page_addr) && ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) { diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index 43f46cd9ede..324c0baf7cd 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -7,8 +7,10 @@ */ #include <linux/namei.h> +#include <linux/sunrpc/svc_xprt.h> #include "xdr3.h" #include "auth.h" +#include "netns.h" #define NFSDDBG_FACILITY NFSDDBG_XDR @@ -323,7 +325,7 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd3_readargs *args) { unsigned int len; - int v,pn; + int v; u32 max_blocksize = svc_max_payload(rqstp); if (!(p = decode_fh(p, &args->fh))) @@ -338,8 +340,9 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, /* set up the kvec */ v=0; while (len > 0) { - pn = rqstp->rq_resused++; - rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]); + struct page *p = *(rqstp->rq_next_page++); + + rqstp->rq_vec[v].iov_base = page_address(p); rqstp->rq_vec[v].iov_len = len < PAGE_SIZE? len : PAGE_SIZE; len -= rqstp->rq_vec[v].iov_len; v++; @@ -461,8 +464,7 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p, len = ntohl(*p++); if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE) return 0; - args->tname = new = - page_address(rqstp->rq_respages[rqstp->rq_resused++]); + args->tname = new = page_address(*(rqstp->rq_next_page++)); args->tlen = len; /* first copy and check from the first page */ old = (char*)p; @@ -533,8 +535,7 @@ nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, { if (!(p = decode_fh(p, &args->fh))) return 0; - args->buffer = - page_address(rqstp->rq_respages[rqstp->rq_resused++]); + args->buffer = page_address(*(rqstp->rq_next_page++)); return xdr_argsize_check(rqstp, p); } @@ -565,8 +566,7 @@ nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, if (args->count > PAGE_SIZE) args->count = PAGE_SIZE; - args->buffer = - page_address(rqstp->rq_respages[rqstp->rq_resused++]); + args->buffer = page_address(*(rqstp->rq_next_page++)); return xdr_argsize_check(rqstp, p); } @@ -575,7 +575,7 @@ int nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd3_readdirargs *args) { - int len, pn; + int len; u32 max_blocksize = svc_max_payload(rqstp); if (!(p = decode_fh(p, &args->fh))) @@ -590,9 +590,9 @@ nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p, args->count = len; while (len > 0) { - pn = rqstp->rq_resused++; + struct page *p = *(rqstp->rq_next_page++); if (!args->buffer) - args->buffer = page_address(rqstp->rq_respages[pn]); + args->buffer = page_address(p); len -= PAGE_SIZE; } @@ -720,12 +720,14 @@ int nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p, struct nfsd3_writeres *resp) { + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + p = encode_wcc_data(rqstp, p, &resp->fh); if (resp->status == 0) { *p++ = htonl(resp->count); *p++ = htonl(resp->committed); - *p++ = htonl(nfssvc_boot.tv_sec); - *p++ = htonl(nfssvc_boot.tv_usec); + *p++ = htonl(nn->nfssvc_boot.tv_sec); + *p++ = htonl(nn->nfssvc_boot.tv_usec); } return xdr_ressize_check(rqstp, p); } @@ -876,7 +878,7 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen, common); __be32 *p = cd->buffer; caddr_t curr_page_addr = NULL; - int pn; /* current page number */ + struct page ** page; int slen; /* string (name) length */ int elen; /* estimated entry length in words */ int num_entry_words = 0; /* actual number of words */ @@ -913,8 +915,9 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen, } /* determine which page in rq_respages[] we are currently filling */ - for (pn=1; pn < cd->rqstp->rq_resused; pn++) { - curr_page_addr = page_address(cd->rqstp->rq_respages[pn]); + for (page = cd->rqstp->rq_respages + 1; + page < cd->rqstp->rq_next_page; page++) { + curr_page_addr = page_address(*page); if (((caddr_t)cd->buffer >= curr_page_addr) && ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE)) @@ -929,14 +932,14 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen, if (plus) p = encode_entryplus_baggage(cd, p, name, namlen); num_entry_words = p - cd->buffer; - } else if (cd->rqstp->rq_respages[pn+1] != NULL) { + } else if (*(page+1) != NULL) { /* temporarily encode entry into next page, then move back to * current and next page in rq_respages[] */ __be32 *p1, *tmp; int len1, len2; /* grab next page for temporary storage of entry */ - p1 = tmp = page_address(cd->rqstp->rq_respages[pn+1]); + p1 = tmp = page_address(*(page+1)); p1 = encode_entry_baggage(cd, p1, name, namlen, ino); @@ -1082,11 +1085,13 @@ int nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p, struct nfsd3_commitres *resp) { + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + p = encode_wcc_data(rqstp, p, &resp->fh); /* Write verifier */ if (resp->status == 0) { - *p++ = htonl(nfssvc_boot.tv_sec); - *p++ = htonl(nfssvc_boot.tv_usec); + *p++ = htonl(nn->nfssvc_boot.tv_sec); + *p++ = htonl(nn->nfssvc_boot.tv_usec); } return xdr_ressize_check(rqstp, p); } diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index bdf29c96e4c..99bc85ff021 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -36,6 +36,7 @@ #include <linux/slab.h> #include "nfsd.h" #include "state.h" +#include "netns.h" #define NFSDDBG_FACILITY NFSDDBG_PROC @@ -625,20 +626,46 @@ static const struct rpc_program cb_program = { .pipe_dir_name = "nfsd4_cb", }; -static int max_cb_time(void) +static int max_cb_time(struct net *net) { - return max(nfsd4_lease/10, (time_t)1) * HZ; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + return max(nn->nfsd4_lease/10, (time_t)1) * HZ; } +static struct rpc_cred *callback_cred; + +int set_callback_cred(void) +{ + if (callback_cred) + return 0; + callback_cred = rpc_lookup_machine_cred("nfs"); + if (!callback_cred) + return -ENOMEM; + return 0; +} + +static struct rpc_cred *get_backchannel_cred(struct nfs4_client *clp, struct rpc_clnt *client, struct nfsd4_session *ses) +{ + if (clp->cl_minorversion == 0) { + return get_rpccred(callback_cred); + } else { + struct rpc_auth *auth = client->cl_auth; + struct auth_cred acred = {}; + + acred.uid = ses->se_cb_sec.uid; + acred.gid = ses->se_cb_sec.gid; + return auth->au_ops->lookup_cred(client->cl_auth, &acred, 0); + } +} static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *conn, struct nfsd4_session *ses) { struct rpc_timeout timeparms = { - .to_initval = max_cb_time(), + .to_initval = max_cb_time(clp->net), .to_retries = 0, }; struct rpc_create_args args = { - .net = &init_net, + .net = clp->net, .address = (struct sockaddr *) &conn->cb_addr, .addrsize = conn->cb_addrlen, .saddress = (struct sockaddr *) &conn->cb_saddr, @@ -648,6 +675,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c .flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET), }; struct rpc_clnt *client; + struct rpc_cred *cred; if (clp->cl_minorversion == 0) { if (!clp->cl_cred.cr_principal && @@ -666,7 +694,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c args.bc_xprt = conn->cb_xprt; args.prognumber = clp->cl_cb_session->se_cb_prog; args.protocol = XPRT_TRANSPORT_BC_TCP; - args.authflavor = RPC_AUTH_UNIX; + args.authflavor = ses->se_cb_sec.flavor; } /* Create RPC client */ client = rpc_create(&args); @@ -675,9 +703,14 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c PTR_ERR(client)); return PTR_ERR(client); } + cred = get_backchannel_cred(clp, client, ses); + if (IS_ERR(cred)) { + rpc_shutdown_client(client); + return PTR_ERR(cred); + } clp->cl_cb_client = client; + clp->cl_cb_cred = cred; return 0; - } static void warn_no_callback_path(struct nfs4_client *clp, int reason) @@ -714,18 +747,6 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = { .rpc_call_done = nfsd4_cb_probe_done, }; -static struct rpc_cred *callback_cred; - -int set_callback_cred(void) -{ - if (callback_cred) - return 0; - callback_cred = rpc_lookup_machine_cred("nfs"); - if (!callback_cred) - return -ENOMEM; - return 0; -} - static struct workqueue_struct *callback_wq; static void run_nfsd4_cb(struct nfsd4_callback *cb) @@ -743,7 +764,6 @@ static void do_probe_callback(struct nfs4_client *clp) cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL]; cb->cb_msg.rpc_argp = NULL; cb->cb_msg.rpc_resp = NULL; - cb->cb_msg.rpc_cred = callback_cred; cb->cb_ops = &nfsd4_cb_probe_ops; @@ -962,6 +982,8 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb) if (clp->cl_cb_client) { rpc_shutdown_client(clp->cl_cb_client); clp->cl_cb_client = NULL; + put_rpccred(clp->cl_cb_cred); + clp->cl_cb_cred = NULL; } if (clp->cl_cb_conn.cb_xprt) { svc_xprt_put(clp->cl_cb_conn.cb_xprt); @@ -995,7 +1017,7 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb) run_nfsd4_cb(cb); } -void nfsd4_do_callback_rpc(struct work_struct *w) +static void nfsd4_do_callback_rpc(struct work_struct *w) { struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback, cb_work); struct nfs4_client *clp = cb->cb_clp; @@ -1010,10 +1032,16 @@ void nfsd4_do_callback_rpc(struct work_struct *w) nfsd4_release_cb(cb); return; } + cb->cb_msg.rpc_cred = clp->cl_cb_cred; rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN, cb->cb_ops, cb); } +void nfsd4_init_callback(struct nfsd4_callback *cb) +{ + INIT_WORK(&cb->cb_work, nfsd4_do_callback_rpc); +} + void nfsd4_cb_recall(struct nfs4_delegation *dp) { struct nfsd4_callback *cb = &dp->dl_recall; @@ -1025,7 +1053,6 @@ void nfsd4_cb_recall(struct nfs4_delegation *dp) cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL]; cb->cb_msg.rpc_argp = cb; cb->cb_msg.rpc_resp = cb; - cb->cb_msg.rpc_cred = callback_cred; cb->cb_ops = &nfsd4_cb_recall_ops; diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 6c9a4b291db..9d1c5dba2bb 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -40,6 +40,7 @@ #include "xdr4.h" #include "vfs.h" #include "current_stateid.h" +#include "netns.h" #define NFSDDBG_FACILITY NFSDDBG_PROC @@ -194,6 +195,7 @@ static __be32 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) { struct svc_fh *resfh; + int accmode; __be32 status; resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); @@ -253,9 +255,10 @@ do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_o /* set reply cache */ fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, &resfh->fh_handle); - if (!open->op_created) - status = do_open_permission(rqstp, resfh, open, - NFSD_MAY_NOP); + accmode = NFSD_MAY_NOP; + if (open->op_created) + accmode |= NFSD_MAY_OWNER_OVERRIDE; + status = do_open_permission(rqstp, resfh, open, accmode); set_change_info(&open->op_cinfo, current_fh); fh_dup2(current_fh, resfh); out: @@ -304,6 +307,8 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, { __be32 status; struct nfsd4_compoundres *resp; + struct net *net = SVC_NET(rqstp); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", (int)open->op_fname.len, open->op_fname.data, @@ -331,7 +336,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, /* check seqid for replay. set nfs4_owner */ resp = rqstp->rq_resp; - status = nfsd4_process_open1(&resp->cstate, open); + status = nfsd4_process_open1(&resp->cstate, open, nn); if (status == nfserr_replay_me) { struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; fh_put(&cstate->current_fh); @@ -354,10 +359,10 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, /* Openowner is now set, so sequence id will get bumped. Now we need * these checks before we do any creates: */ status = nfserr_grace; - if (locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) + if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) goto out; status = nfserr_no_grace; - if (!locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) + if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) goto out; switch (open->op_claim_type) { @@ -370,7 +375,9 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, break; case NFS4_OPEN_CLAIM_PREVIOUS: open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; - status = nfs4_check_open_reclaim(&open->op_clientid, cstate->minorversion); + status = nfs4_check_open_reclaim(&open->op_clientid, + cstate->minorversion, + nn); if (status) goto out; case NFS4_OPEN_CLAIM_FH: @@ -490,12 +497,13 @@ nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, &access->ac_supported); } -static void gen_boot_verifier(nfs4_verifier *verifier) +static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) { __be32 verf[2]; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); - verf[0] = (__be32)nfssvc_boot.tv_sec; - verf[1] = (__be32)nfssvc_boot.tv_usec; + verf[0] = (__be32)nn->nfssvc_boot.tv_sec; + verf[1] = (__be32)nn->nfssvc_boot.tv_usec; memcpy(verifier->data, verf, sizeof(verifier->data)); } @@ -503,7 +511,7 @@ static __be32 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_commit *commit) { - gen_boot_verifier(&commit->co_verf); + gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, commit->co_count); } @@ -684,6 +692,17 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if (read->rd_offset >= OFFSET_MAX) return nfserr_inval; + /* + * If we do a zero copy read, then a client will see read data + * that reflects the state of the file *after* performing the + * following compound. + * + * To ensure proper ordering, we therefore turn off zero copy if + * the client wants us to do more in this compound: + */ + if (!nfsd4_last_compound_op(rqstp)) + rqstp->rq_splice_ok = false; + nfs4_lock_state(); /* check stateid */ if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), @@ -876,6 +895,24 @@ out: return status; } +static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) +{ + int i = 1; + int buflen = write->wr_buflen; + + vec[0].iov_base = write->wr_head.iov_base; + vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); + buflen -= vec[0].iov_len; + + while (buflen) { + vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); + vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); + buflen -= vec[i].iov_len; + i++; + } + return i; +} + static __be32 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_write *write) @@ -884,6 +921,7 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct file *filp = NULL; __be32 status = nfs_ok; unsigned long cnt; + int nvecs; /* no need to check permission - this will be done in nfsd_write() */ @@ -904,10 +942,13 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, cnt = write->wr_buflen; write->wr_how_written = write->wr_stable_how; - gen_boot_verifier(&write->wr_verifier); + gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); + + nvecs = fill_in_write_vector(rqstp->rq_vec, write); + WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); status = nfsd_write(rqstp, &cstate->current_fh, filp, - write->wr_offset, rqstp->rq_vec, write->wr_vlen, + write->wr_offset, rqstp->rq_vec, nvecs, &cnt, &write->wr_how_written); if (filp) fput(filp); @@ -1666,6 +1707,12 @@ static struct nfsd4_operation nfsd4_ops[] = { .op_name = "OP_EXCHANGE_ID", .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, }, + [OP_BACKCHANNEL_CTL] = { + .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, + .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, + .op_name = "OP_BACKCHANNEL_CTL", + .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, + }, [OP_BIND_CONN_TO_SESSION] = { .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP @@ -1719,6 +1766,7 @@ static struct nfsd4_operation nfsd4_ops[] = { .op_func = (nfsd4op_func)nfsd4_free_stateid, .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, .op_name = "OP_FREE_STATEID", + .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, }; diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 43295d45cc2..ba6fdd4a045 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -58,13 +58,11 @@ struct nfsd4_client_tracking_ops { void (*create)(struct nfs4_client *); void (*remove)(struct nfs4_client *); int (*check)(struct nfs4_client *); - void (*grace_done)(struct net *, time_t); + void (*grace_done)(struct nfsd_net *, time_t); }; /* Globals */ -static struct file *rec_file; static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; -static struct nfsd4_client_tracking_ops *client_tracking_ops; static int nfs4_save_creds(const struct cred **original_creds) @@ -102,33 +100,39 @@ md5_to_hex(char *out, char *md5) *out = '\0'; } -__be32 -nfs4_make_rec_clidname(char *dname, struct xdr_netobj *clname) +static int +nfs4_make_rec_clidname(char *dname, const struct xdr_netobj *clname) { struct xdr_netobj cksum; struct hash_desc desc; struct scatterlist sg; - __be32 status = nfserr_jukebox; + int status; dprintk("NFSD: nfs4_make_rec_clidname for %.*s\n", clname->len, clname->data); desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; desc.tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC); - if (IS_ERR(desc.tfm)) + if (IS_ERR(desc.tfm)) { + status = PTR_ERR(desc.tfm); goto out_no_tfm; + } + cksum.len = crypto_hash_digestsize(desc.tfm); cksum.data = kmalloc(cksum.len, GFP_KERNEL); - if (cksum.data == NULL) + if (cksum.data == NULL) { + status = -ENOMEM; goto out; + } sg_init_one(&sg, clname->data, clname->len); - if (crypto_hash_digest(&desc, &sg, sg.length, cksum.data)) + status = crypto_hash_digest(&desc, &sg, sg.length, cksum.data); + if (status) goto out; md5_to_hex(dname, cksum.data); - status = nfs_ok; + status = 0; out: kfree(cksum.data); crypto_free_hash(desc.tfm); @@ -136,29 +140,61 @@ out_no_tfm: return status; } +/* + * If we had an error generating the recdir name for the legacy tracker + * then warn the admin. If the error doesn't appear to be transient, + * then disable recovery tracking. + */ +static void +legacy_recdir_name_error(int error) +{ + printk(KERN_ERR "NFSD: unable to generate recoverydir " + "name (%d).\n", error); + + /* + * if the algorithm just doesn't exist, then disable the recovery + * tracker altogether. The crypto libs will generally return this if + * FIPS is enabled as well. + */ + if (error == -ENOENT) { + printk(KERN_ERR "NFSD: disabling legacy clientid tracking. " + "Reboot recovery will not function correctly!\n"); + + /* the argument is ignored by the legacy exit function */ + nfsd4_client_tracking_exit(NULL); + } +} + static void nfsd4_create_clid_dir(struct nfs4_client *clp) { const struct cred *original_cred; - char *dname = clp->cl_recdir; + char dname[HEXDIR_LEN]; struct dentry *dir, *dentry; + struct nfs4_client_reclaim *crp; int status; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname); if (test_and_set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return; - if (!rec_file) + if (!nn->rec_file) return; + + status = nfs4_make_rec_clidname(dname, &clp->cl_name); + if (status) + return legacy_recdir_name_error(status); + status = nfs4_save_creds(&original_cred); if (status < 0) return; - status = mnt_want_write_file(rec_file); + status = mnt_want_write_file(nn->rec_file); if (status) return; - dir = rec_file->f_path.dentry; + dir = nn->rec_file->f_path.dentry; /* lock the parent */ mutex_lock(&dir->d_inode->i_mutex); @@ -182,18 +218,24 @@ out_put: dput(dentry); out_unlock: mutex_unlock(&dir->d_inode->i_mutex); - if (status == 0) - vfs_fsync(rec_file, 0); - else + if (status == 0) { + if (nn->in_grace) { + crp = nfs4_client_to_reclaim(dname, nn); + if (crp) + crp->cr_clp = clp; + } + vfs_fsync(nn->rec_file, 0); + } else { printk(KERN_ERR "NFSD: failed to write recovery record" " (err %d); please check that %s exists" " and is writeable", status, user_recovery_dirname); - mnt_drop_write_file(rec_file); + } + mnt_drop_write_file(nn->rec_file); nfs4_reset_creds(original_cred); } -typedef int (recdir_func)(struct dentry *, struct dentry *); +typedef int (recdir_func)(struct dentry *, struct dentry *, struct nfsd_net *); struct name_list { char name[HEXDIR_LEN]; @@ -219,10 +261,10 @@ nfsd4_build_namelist(void *arg, const char *name, int namlen, } static int -nfsd4_list_rec_dir(recdir_func *f) +nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn) { const struct cred *original_cred; - struct dentry *dir = rec_file->f_path.dentry; + struct dentry *dir = nn->rec_file->f_path.dentry; LIST_HEAD(names); int status; @@ -230,13 +272,13 @@ nfsd4_list_rec_dir(recdir_func *f) if (status < 0) return status; - status = vfs_llseek(rec_file, 0, SEEK_SET); + status = vfs_llseek(nn->rec_file, 0, SEEK_SET); if (status < 0) { nfs4_reset_creds(original_cred); return status; } - status = vfs_readdir(rec_file, nfsd4_build_namelist, &names); + status = vfs_readdir(nn->rec_file, nfsd4_build_namelist, &names); mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT); while (!list_empty(&names)) { struct name_list *entry; @@ -248,7 +290,7 @@ nfsd4_list_rec_dir(recdir_func *f) status = PTR_ERR(dentry); break; } - status = f(dir, dentry); + status = f(dir, dentry, nn); dput(dentry); } list_del(&entry->list); @@ -260,14 +302,14 @@ nfsd4_list_rec_dir(recdir_func *f) } static int -nfsd4_unlink_clid_dir(char *name, int namlen) +nfsd4_unlink_clid_dir(char *name, int namlen, struct nfsd_net *nn) { struct dentry *dir, *dentry; int status; dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name); - dir = rec_file->f_path.dentry; + dir = nn->rec_file->f_path.dentry; mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT); dentry = lookup_one_len(name, dir, namlen); if (IS_ERR(dentry)) { @@ -289,37 +331,52 @@ static void nfsd4_remove_clid_dir(struct nfs4_client *clp) { const struct cred *original_cred; + struct nfs4_client_reclaim *crp; + char dname[HEXDIR_LEN]; int status; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); - if (!rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) + if (!nn->rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return; - status = mnt_want_write_file(rec_file); + status = nfs4_make_rec_clidname(dname, &clp->cl_name); + if (status) + return legacy_recdir_name_error(status); + + status = mnt_want_write_file(nn->rec_file); if (status) goto out; clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); status = nfs4_save_creds(&original_cred); if (status < 0) - goto out; + goto out_drop_write; - status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1); + status = nfsd4_unlink_clid_dir(dname, HEXDIR_LEN-1, nn); nfs4_reset_creds(original_cred); - if (status == 0) - vfs_fsync(rec_file, 0); - mnt_drop_write_file(rec_file); + if (status == 0) { + vfs_fsync(nn->rec_file, 0); + if (nn->in_grace) { + /* remove reclaim record */ + crp = nfsd4_find_reclaim_client(dname, nn); + if (crp) + nfs4_remove_reclaim_record(crp, nn); + } + } +out_drop_write: + mnt_drop_write_file(nn->rec_file); out: if (status) printk("NFSD: Failed to remove expired client state directory" - " %.*s\n", HEXDIR_LEN, clp->cl_recdir); + " %.*s\n", HEXDIR_LEN, dname); } static int -purge_old(struct dentry *parent, struct dentry *child) +purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) { int status; - if (nfs4_has_reclaimed_state(child->d_name.name, false)) + if (nfs4_has_reclaimed_state(child->d_name.name, nn)) return 0; status = vfs_rmdir(parent->d_inode, child); @@ -331,27 +388,29 @@ purge_old(struct dentry *parent, struct dentry *child) } static void -nfsd4_recdir_purge_old(struct net *net, time_t boot_time) +nfsd4_recdir_purge_old(struct nfsd_net *nn, time_t boot_time) { int status; - if (!rec_file) + nn->in_grace = false; + if (!nn->rec_file) return; - status = mnt_want_write_file(rec_file); + status = mnt_want_write_file(nn->rec_file); if (status) goto out; - status = nfsd4_list_rec_dir(purge_old); + status = nfsd4_list_rec_dir(purge_old, nn); if (status == 0) - vfs_fsync(rec_file, 0); - mnt_drop_write_file(rec_file); + vfs_fsync(nn->rec_file, 0); + mnt_drop_write_file(nn->rec_file); out: + nfs4_release_reclaim(nn); if (status) printk("nfsd4: failed to purge old clients from recovery" - " directory %s\n", rec_file->f_path.dentry->d_name.name); + " directory %s\n", nn->rec_file->f_path.dentry->d_name.name); } static int -load_recdir(struct dentry *parent, struct dentry *child) +load_recdir(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) { if (child->d_name.len != HEXDIR_LEN - 1) { printk("nfsd4: illegal name %s in recovery directory\n", @@ -359,21 +418,22 @@ load_recdir(struct dentry *parent, struct dentry *child) /* Keep trying; maybe the others are OK: */ return 0; } - nfs4_client_to_reclaim(child->d_name.name); + nfs4_client_to_reclaim(child->d_name.name, nn); return 0; } static int -nfsd4_recdir_load(void) { +nfsd4_recdir_load(struct net *net) { int status; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); - if (!rec_file) + if (!nn->rec_file) return 0; - status = nfsd4_list_rec_dir(load_recdir); + status = nfsd4_list_rec_dir(load_recdir, nn); if (status) printk("nfsd4: failed loading clients from recovery" - " directory %s\n", rec_file->f_path.dentry->d_name.name); + " directory %s\n", nn->rec_file->f_path.dentry->d_name.name); return status; } @@ -382,15 +442,16 @@ nfsd4_recdir_load(void) { */ static int -nfsd4_init_recdir(void) +nfsd4_init_recdir(struct net *net) { + struct nfsd_net *nn = net_generic(net, nfsd_net_id); const struct cred *original_cred; int status; printk("NFSD: Using %s as the NFSv4 state recovery directory\n", user_recovery_dirname); - BUG_ON(rec_file); + BUG_ON(nn->rec_file); status = nfs4_save_creds(&original_cred); if (status < 0) { @@ -400,23 +461,65 @@ nfsd4_init_recdir(void) return status; } - rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0); - if (IS_ERR(rec_file)) { + nn->rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0); + if (IS_ERR(nn->rec_file)) { printk("NFSD: unable to find recovery directory %s\n", user_recovery_dirname); - status = PTR_ERR(rec_file); - rec_file = NULL; + status = PTR_ERR(nn->rec_file); + nn->rec_file = NULL; } nfs4_reset_creds(original_cred); + if (!status) + nn->in_grace = true; return status; } + +static int +nfs4_legacy_state_init(struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + int i; + + nn->reclaim_str_hashtbl = kmalloc(sizeof(struct list_head) * + CLIENT_HASH_SIZE, GFP_KERNEL); + if (!nn->reclaim_str_hashtbl) + return -ENOMEM; + + for (i = 0; i < CLIENT_HASH_SIZE; i++) + INIT_LIST_HEAD(&nn->reclaim_str_hashtbl[i]); + nn->reclaim_str_hashtbl_size = 0; + + return 0; +} + +static void +nfs4_legacy_state_shutdown(struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + kfree(nn->reclaim_str_hashtbl); +} + static int nfsd4_load_reboot_recovery_data(struct net *net) { int status; + status = nfsd4_init_recdir(net); + if (!status) + status = nfsd4_recdir_load(net); + if (status) + printk(KERN_ERR "NFSD: Failure reading reboot recovery data\n"); + return status; +} + +static int +nfsd4_legacy_tracking_init(struct net *net) +{ + int status; + /* XXX: The legacy code won't work in a container */ if (net != &init_net) { WARN(1, KERN_ERR "NFSD: attempt to initialize legacy client " @@ -424,30 +527,37 @@ nfsd4_load_reboot_recovery_data(struct net *net) return -EINVAL; } - nfs4_lock_state(); - status = nfsd4_init_recdir(); - if (!status) - status = nfsd4_recdir_load(); - nfs4_unlock_state(); + status = nfs4_legacy_state_init(net); if (status) - printk(KERN_ERR "NFSD: Failure reading reboot recovery data\n"); + return status; + + status = nfsd4_load_reboot_recovery_data(net); + if (status) + goto err; + return 0; + +err: + nfs4_legacy_state_shutdown(net); return status; } static void -nfsd4_shutdown_recdir(void) +nfsd4_shutdown_recdir(struct nfsd_net *nn) { - if (!rec_file) + if (!nn->rec_file) return; - fput(rec_file); - rec_file = NULL; + fput(nn->rec_file); + nn->rec_file = NULL; } static void nfsd4_legacy_tracking_exit(struct net *net) { - nfs4_release_reclaim(); - nfsd4_shutdown_recdir(); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + nfs4_release_reclaim(nn); + nfsd4_shutdown_recdir(nn); + nfs4_legacy_state_shutdown(net); } /* @@ -480,13 +590,26 @@ nfs4_recoverydir(void) static int nfsd4_check_legacy_client(struct nfs4_client *clp) { + int status; + char dname[HEXDIR_LEN]; + struct nfs4_client_reclaim *crp; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + /* did we already find that this client is stable? */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) return 0; + status = nfs4_make_rec_clidname(dname, &clp->cl_name); + if (status) { + legacy_recdir_name_error(status); + return status; + } + /* look for it in the reclaim hashtable otherwise */ - if (nfsd4_find_reclaim_client(clp)) { + crp = nfsd4_find_reclaim_client(dname, nn); + if (crp) { set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); + crp->cr_clp = clp; return 0; } @@ -494,7 +617,7 @@ nfsd4_check_legacy_client(struct nfs4_client *clp) } static struct nfsd4_client_tracking_ops nfsd4_legacy_tracking_ops = { - .init = nfsd4_load_reboot_recovery_data, + .init = nfsd4_legacy_tracking_init, .exit = nfsd4_legacy_tracking_exit, .create = nfsd4_create_clid_dir, .remove = nfsd4_remove_clid_dir, @@ -785,8 +908,7 @@ nfsd4_cld_create(struct nfs4_client *clp) { int ret; struct cld_upcall *cup; - /* FIXME: determine net from clp */ - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); struct cld_net *cn = nn->cld_net; /* Don't upcall if it's already stored */ @@ -823,8 +945,7 @@ nfsd4_cld_remove(struct nfs4_client *clp) { int ret; struct cld_upcall *cup; - /* FIXME: determine net from clp */ - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); struct cld_net *cn = nn->cld_net; /* Don't upcall if it's already removed */ @@ -861,8 +982,7 @@ nfsd4_cld_check(struct nfs4_client *clp) { int ret; struct cld_upcall *cup; - /* FIXME: determine net from clp */ - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); struct cld_net *cn = nn->cld_net; /* Don't upcall if one was already stored during this grace pd */ @@ -892,11 +1012,10 @@ nfsd4_cld_check(struct nfs4_client *clp) } static void -nfsd4_cld_grace_done(struct net *net, time_t boot_time) +nfsd4_cld_grace_done(struct nfsd_net *nn, time_t boot_time) { int ret; struct cld_upcall *cup; - struct nfsd_net *nn = net_generic(net, nfsd_net_id); struct cld_net *cn = nn->cld_net; cup = alloc_cld_upcall(cn); @@ -926,28 +1045,261 @@ static struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops = { .grace_done = nfsd4_cld_grace_done, }; +/* upcall via usermodehelper */ +static char cltrack_prog[PATH_MAX] = "/sbin/nfsdcltrack"; +module_param_string(cltrack_prog, cltrack_prog, sizeof(cltrack_prog), + S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(cltrack_prog, "Path to the nfsdcltrack upcall program"); + +static bool cltrack_legacy_disable; +module_param(cltrack_legacy_disable, bool, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(cltrack_legacy_disable, + "Disable legacy recoverydir conversion. Default: false"); + +#define LEGACY_TOPDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_TOPDIR=" +#define LEGACY_RECDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_RECDIR=" + +static char * +nfsd4_cltrack_legacy_topdir(void) +{ + int copied; + size_t len; + char *result; + + if (cltrack_legacy_disable) + return NULL; + + len = strlen(LEGACY_TOPDIR_ENV_PREFIX) + + strlen(nfs4_recoverydir()) + 1; + + result = kmalloc(len, GFP_KERNEL); + if (!result) + return result; + + copied = snprintf(result, len, LEGACY_TOPDIR_ENV_PREFIX "%s", + nfs4_recoverydir()); + if (copied >= len) { + /* just return nothing if output was truncated */ + kfree(result); + return NULL; + } + + return result; +} + +static char * +nfsd4_cltrack_legacy_recdir(const struct xdr_netobj *name) +{ + int copied; + size_t len; + char *result; + + if (cltrack_legacy_disable) + return NULL; + + /* +1 is for '/' between "topdir" and "recdir" */ + len = strlen(LEGACY_RECDIR_ENV_PREFIX) + + strlen(nfs4_recoverydir()) + 1 + HEXDIR_LEN; + + result = kmalloc(len, GFP_KERNEL); + if (!result) + return result; + + copied = snprintf(result, len, LEGACY_RECDIR_ENV_PREFIX "%s/", + nfs4_recoverydir()); + if (copied > (len - HEXDIR_LEN)) { + /* just return nothing if output will be truncated */ + kfree(result); + return NULL; + } + + copied = nfs4_make_rec_clidname(result + copied, name); + if (copied) { + kfree(result); + return NULL; + } + + return result; +} + +static int +nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *legacy) +{ + char *envp[2]; + char *argv[4]; + int ret; + + if (unlikely(!cltrack_prog[0])) { + dprintk("%s: cltrack_prog is disabled\n", __func__); + return -EACCES; + } + + dprintk("%s: cmd: %s\n", __func__, cmd); + dprintk("%s: arg: %s\n", __func__, arg ? arg : "(null)"); + dprintk("%s: legacy: %s\n", __func__, legacy ? legacy : "(null)"); + + envp[0] = legacy; + envp[1] = NULL; + + argv[0] = (char *)cltrack_prog; + argv[1] = cmd; + argv[2] = arg; + argv[3] = NULL; + + ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC); + /* + * Disable the upcall mechanism if we're getting an ENOENT or EACCES + * error. The admin can re-enable it on the fly by using sysfs + * once the problem has been fixed. + */ + if (ret == -ENOENT || ret == -EACCES) { + dprintk("NFSD: %s was not found or isn't executable (%d). " + "Setting cltrack_prog to blank string!", + cltrack_prog, ret); + cltrack_prog[0] = '\0'; + } + dprintk("%s: %s return value: %d\n", __func__, cltrack_prog, ret); + + return ret; +} + +static char * +bin_to_hex_dup(const unsigned char *src, int srclen) +{ + int i; + char *buf, *hex; + + /* +1 for terminating NULL */ + buf = kmalloc((srclen * 2) + 1, GFP_KERNEL); + if (!buf) + return buf; + + hex = buf; + for (i = 0; i < srclen; i++) { + sprintf(hex, "%2.2x", *src++); + hex += 2; + } + return buf; +} + +static int +nfsd4_umh_cltrack_init(struct net __attribute__((unused)) *net) +{ + return nfsd4_umh_cltrack_upcall("init", NULL, NULL); +} + +static void +nfsd4_umh_cltrack_create(struct nfs4_client *clp) +{ + char *hexid; + + hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); + if (!hexid) { + dprintk("%s: can't allocate memory for upcall!\n", __func__); + return; + } + nfsd4_umh_cltrack_upcall("create", hexid, NULL); + kfree(hexid); +} + +static void +nfsd4_umh_cltrack_remove(struct nfs4_client *clp) +{ + char *hexid; + + hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); + if (!hexid) { + dprintk("%s: can't allocate memory for upcall!\n", __func__); + return; + } + nfsd4_umh_cltrack_upcall("remove", hexid, NULL); + kfree(hexid); +} + +static int +nfsd4_umh_cltrack_check(struct nfs4_client *clp) +{ + int ret; + char *hexid, *legacy; + + hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); + if (!hexid) { + dprintk("%s: can't allocate memory for upcall!\n", __func__); + return -ENOMEM; + } + legacy = nfsd4_cltrack_legacy_recdir(&clp->cl_name); + ret = nfsd4_umh_cltrack_upcall("check", hexid, legacy); + kfree(legacy); + kfree(hexid); + return ret; +} + +static void +nfsd4_umh_cltrack_grace_done(struct nfsd_net __attribute__((unused)) *nn, + time_t boot_time) +{ + char *legacy; + char timestr[22]; /* FIXME: better way to determine max size? */ + + sprintf(timestr, "%ld", boot_time); + legacy = nfsd4_cltrack_legacy_topdir(); + nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy); + kfree(legacy); +} + +static struct nfsd4_client_tracking_ops nfsd4_umh_tracking_ops = { + .init = nfsd4_umh_cltrack_init, + .exit = NULL, + .create = nfsd4_umh_cltrack_create, + .remove = nfsd4_umh_cltrack_remove, + .check = nfsd4_umh_cltrack_check, + .grace_done = nfsd4_umh_cltrack_grace_done, +}; + int nfsd4_client_tracking_init(struct net *net) { int status; struct path path; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); - if (!client_tracking_ops) { - client_tracking_ops = &nfsd4_cld_tracking_ops; - status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path); - if (!status) { - if (S_ISDIR(path.dentry->d_inode->i_mode)) - client_tracking_ops = - &nfsd4_legacy_tracking_ops; - path_put(&path); - } + /* just run the init if it the method is already decided */ + if (nn->client_tracking_ops) + goto do_init; + + /* + * First, try a UMH upcall. It should succeed or fail quickly, so + * there's little harm in trying that first. + */ + nn->client_tracking_ops = &nfsd4_umh_tracking_ops; + status = nn->client_tracking_ops->init(net); + if (!status) + return status; + + /* + * See if the recoverydir exists and is a directory. If it is, + * then use the legacy ops. + */ + nn->client_tracking_ops = &nfsd4_legacy_tracking_ops; + status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path); + if (!status) { + status = S_ISDIR(path.dentry->d_inode->i_mode); + path_put(&path); + if (status) + goto do_init; } - status = client_tracking_ops->init(net); + /* Finally, try to use nfsdcld */ + nn->client_tracking_ops = &nfsd4_cld_tracking_ops; + printk(KERN_WARNING "NFSD: the nfsdcld client tracking upcall will be " + "removed in 3.10. Please transition to using " + "nfsdcltrack.\n"); +do_init: + status = nn->client_tracking_ops->init(net); if (status) { printk(KERN_WARNING "NFSD: Unable to initialize client " "recovery tracking! (%d)\n", status); - client_tracking_ops = NULL; + nn->client_tracking_ops = NULL; } return status; } @@ -955,40 +1307,49 @@ nfsd4_client_tracking_init(struct net *net) void nfsd4_client_tracking_exit(struct net *net) { - if (client_tracking_ops) { - client_tracking_ops->exit(net); - client_tracking_ops = NULL; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + if (nn->client_tracking_ops) { + if (nn->client_tracking_ops->exit) + nn->client_tracking_ops->exit(net); + nn->client_tracking_ops = NULL; } } void nfsd4_client_record_create(struct nfs4_client *clp) { - if (client_tracking_ops) - client_tracking_ops->create(clp); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + if (nn->client_tracking_ops) + nn->client_tracking_ops->create(clp); } void nfsd4_client_record_remove(struct nfs4_client *clp) { - if (client_tracking_ops) - client_tracking_ops->remove(clp); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + if (nn->client_tracking_ops) + nn->client_tracking_ops->remove(clp); } int nfsd4_client_record_check(struct nfs4_client *clp) { - if (client_tracking_ops) - return client_tracking_ops->check(clp); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + if (nn->client_tracking_ops) + return nn->client_tracking_ops->check(clp); return -EOPNOTSUPP; } void -nfsd4_record_grace_done(struct net *net, time_t boot_time) +nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time) { - if (client_tracking_ops) - client_tracking_ops->grace_done(net, boot_time); + if (nn->client_tracking_ops) + nn->client_tracking_ops->grace_done(nn, boot_time); } static int diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index d0237f872cc..ac8ed96c419 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -44,16 +44,11 @@ #include "xdr4.h" #include "vfs.h" #include "current_stateid.h" -#include "fault_inject.h" #include "netns.h" #define NFSDDBG_FACILITY NFSDDBG_PROC -/* Globals */ -time_t nfsd4_lease = 90; /* default lease time */ -time_t nfsd4_grace = 90; - #define all_ones {{~0,~0},~0} static const stateid_t one_stateid = { .si_generation = ~0, @@ -176,8 +171,6 @@ static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) return ret & OWNER_HASH_MASK; } -static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; - /* hash table for nfs4_file */ #define FILE_HASH_BITS 8 #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) @@ -192,7 +185,7 @@ static struct list_head file_hashtbl[FILE_HASH_SIZE]; static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) { - BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); + WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); atomic_inc(&fp->fi_access[oflag]); } @@ -251,7 +244,7 @@ static inline int get_new_stid(struct nfs4_stid *stid) * preallocations that can exist at a time, but the state lock * prevents anyone from using ours before we get here: */ - BUG_ON(error); + WARN_ON_ONCE(error); /* * It shouldn't be a problem to reuse an opaque stateid value. * I don't think it is for 4.1. But with 4.0 I worry that, for @@ -340,7 +333,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct sv fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); dp->dl_time = 0; atomic_set(&dp->dl_count, 1); - INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); + nfsd4_init_callback(&dp->dl_recall); return dp; } @@ -390,14 +383,6 @@ unhash_delegation(struct nfs4_delegation *dp) * SETCLIENTID state */ -/* client_lock protects the client lru list and session hash table */ -static DEFINE_SPINLOCK(client_lock); - -/* Hash tables for nfs4_clientid state */ -#define CLIENT_HASH_BITS 4 -#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) -#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) - static unsigned int clientid_hashval(u32 id) { return id & CLIENT_HASH_MASK; @@ -409,31 +394,6 @@ static unsigned int clientstr_hashval(const char *name) } /* - * reclaim_str_hashtbl[] holds known client info from previous reset/reboot - * used in reboot/reset lease grace period processing - * - * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed - * setclientid_confirmed info. - * - * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed - * setclientid info. - * - * client_lru holds client queue ordered by nfs4_client.cl_time - * for lease renewal. - * - * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time - * for last close replay. - */ -static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; -static int reclaim_str_hashtbl_size = 0; -static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; -static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; -static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; -static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; -static struct list_head client_lru; -static struct list_head close_lru; - -/* * We store the NONE, READ, WRITE, and BOTH bits separately in the * st_{access,deny}_bmap field of the stateid, in order to track not * only what share bits are currently in force, but also what @@ -526,7 +486,8 @@ static int nfs4_access_to_omode(u32 access) case NFS4_SHARE_ACCESS_BOTH: return O_RDWR; } - BUG(); + WARN_ON_ONCE(1); + return O_RDONLY; } /* release all access and file references for a given stateid */ @@ -652,9 +613,6 @@ static void release_openowner(struct nfs4_openowner *oo) nfs4_free_openowner(oo); } -#define SESSION_HASH_SIZE 512 -static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; - static inline int hash_sessionid(struct nfs4_sessionid *sessionid) { @@ -785,9 +743,12 @@ out_free: return NULL; } -static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) +static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, + struct nfsd4_channel_attrs *req, + int numslots, int slotsize, + struct nfsd_net *nn) { - u32 maxrpc = nfsd_serv->sv_max_mesg; + u32 maxrpc = nn->nfsd_serv->sv_max_mesg; new->maxreqs = numslots; new->maxresp_cached = min_t(u32, req->maxresp_cached, @@ -906,21 +867,27 @@ static void __free_session(struct nfsd4_session *ses) static void free_session(struct kref *kref) { struct nfsd4_session *ses; + struct nfsd_net *nn; - lockdep_assert_held(&client_lock); ses = container_of(kref, struct nfsd4_session, se_ref); + nn = net_generic(ses->se_client->net, nfsd_net_id); + + lockdep_assert_held(&nn->client_lock); nfsd4_del_conns(ses); __free_session(ses); } void nfsd4_put_session(struct nfsd4_session *ses) { - spin_lock(&client_lock); + struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); + + spin_lock(&nn->client_lock); nfsd4_put_session_locked(ses); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); } -static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) +static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan, + struct nfsd_net *nn) { struct nfsd4_session *new; int numslots, slotsize; @@ -941,13 +908,14 @@ static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) nfsd4_put_drc_mem(slotsize, fchan->maxreqs); return NULL; } - init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); + init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize, nn); return new; } -static struct nfsd4_session *init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) +static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) { int idx; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); new->se_client = clp; gen_sessionid(new); @@ -957,14 +925,15 @@ static struct nfsd4_session *init_session(struct svc_rqst *rqstp, struct nfsd4_s new->se_cb_seq_nr = 1; new->se_flags = cses->flags; new->se_cb_prog = cses->callback_prog; + new->se_cb_sec = cses->cb_sec; kref_init(&new->se_ref); idx = hash_sessionid(&new->se_sessionid); - spin_lock(&client_lock); - list_add(&new->se_hash, &sessionid_hashtbl[idx]); + spin_lock(&nn->client_lock); + list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); spin_lock(&clp->cl_lock); list_add(&new->se_perclnt, &clp->cl_sessions); spin_unlock(&clp->cl_lock); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); if (cses->flags & SESSION4_BACK_CHAN) { struct sockaddr *sa = svc_addr(rqstp); @@ -978,20 +947,20 @@ static struct nfsd4_session *init_session(struct svc_rqst *rqstp, struct nfsd4_s rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); } - return new; } /* caller must hold client_lock */ static struct nfsd4_session * -find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) +find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) { struct nfsd4_session *elem; int idx; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); dump_sessionid(__func__, sessionid); idx = hash_sessionid(sessionid); /* Search in the appropriate list */ - list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { + list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { if (!memcmp(elem->se_sessionid.data, sessionid->data, NFS4_MAX_SESSIONID_LEN)) { return elem; @@ -1016,6 +985,8 @@ unhash_session(struct nfsd4_session *ses) static inline void renew_client_locked(struct nfs4_client *clp) { + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + if (is_client_expired(clp)) { WARN_ON(1); printk("%s: client (clientid %08x/%08x) already expired\n", @@ -1028,16 +999,18 @@ renew_client_locked(struct nfs4_client *clp) dprintk("renewing client (clientid %08x/%08x)\n", clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); - list_move_tail(&clp->cl_lru, &client_lru); + list_move_tail(&clp->cl_lru, &nn->client_lru); clp->cl_time = get_seconds(); } static inline void renew_client(struct nfs4_client *clp) { - spin_lock(&client_lock); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + spin_lock(&nn->client_lock); renew_client_locked(clp); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); } /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ @@ -1075,7 +1048,9 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name) static inline void free_client(struct nfs4_client *clp) { - lockdep_assert_held(&client_lock); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + lockdep_assert_held(&nn->client_lock); while (!list_empty(&clp->cl_sessions)) { struct nfsd4_session *ses; ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, @@ -1092,15 +1067,16 @@ void release_session_client(struct nfsd4_session *session) { struct nfs4_client *clp = session->se_client; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); - if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) + if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) return; if (is_client_expired(clp)) { free_client(clp); session->se_client = NULL; } else renew_client_locked(clp); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); } /* must be called under the client_lock */ @@ -1123,6 +1099,7 @@ destroy_client(struct nfs4_client *clp) struct nfs4_openowner *oo; struct nfs4_delegation *dp; struct list_head reaplist; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); INIT_LIST_HEAD(&reaplist); spin_lock(&recall_lock); @@ -1144,12 +1121,15 @@ destroy_client(struct nfs4_client *clp) if (clp->cl_cb_conn.cb_xprt) svc_xprt_put(clp->cl_cb_conn.cb_xprt); list_del(&clp->cl_idhash); - list_del(&clp->cl_strhash); - spin_lock(&client_lock); + if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) + rb_erase(&clp->cl_namenode, &nn->conf_name_tree); + else + rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); + spin_lock(&nn->client_lock); unhash_client_locked(clp); if (atomic_read(&clp->cl_refcount) == 0) free_client(clp); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); } static void expire_client(struct nfs4_client *clp) @@ -1187,6 +1167,17 @@ static int copy_cred(struct svc_cred *target, struct svc_cred *source) return 0; } +static long long +compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) +{ + long long res; + + res = o1->len - o2->len; + if (res) + return res; + return (long long)memcmp(o1->data, o2->data, o1->len); +} + static int same_name(const char *n1, const char *n2) { return 0 == memcmp(n1, n2, HEXDIR_LEN); @@ -1247,10 +1238,9 @@ same_creds(struct svc_cred *cr1, struct svc_cred *cr2) return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); } -static void gen_clid(struct nfs4_client *clp) +static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) { static u32 current_clientid = 1; - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); clp->cl_clientid.cl_boot = nn->boot_time; clp->cl_clientid.cl_id = current_clientid++; @@ -1283,12 +1273,14 @@ static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t return NULL; } -static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, +static struct nfs4_client *create_client(struct xdr_netobj name, struct svc_rqst *rqstp, nfs4_verifier *verf) { struct nfs4_client *clp; struct sockaddr *sa = svc_addr(rqstp); int ret; + struct net *net = SVC_NET(rqstp); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); clp = alloc_client(name); if (clp == NULL) @@ -1297,23 +1289,21 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, INIT_LIST_HEAD(&clp->cl_sessions); ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); if (ret) { - spin_lock(&client_lock); + spin_lock(&nn->client_lock); free_client(clp); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); return NULL; } idr_init(&clp->cl_stateids); - memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); atomic_set(&clp->cl_refcount, 0); clp->cl_cb_state = NFSD4_CB_UNKNOWN; INIT_LIST_HEAD(&clp->cl_idhash); - INIT_LIST_HEAD(&clp->cl_strhash); INIT_LIST_HEAD(&clp->cl_openowners); INIT_LIST_HEAD(&clp->cl_delegations); INIT_LIST_HEAD(&clp->cl_lru); INIT_LIST_HEAD(&clp->cl_callbacks); spin_lock_init(&clp->cl_lock); - INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); + nfsd4_init_callback(&clp->cl_cb_null); clp->cl_time = get_seconds(); clear_bit(0, &clp->cl_cb_slot_busy); rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); @@ -1321,17 +1311,60 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); gen_confirm(clp); clp->cl_cb_session = NULL; + clp->net = net; return clp; } static void -add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) +add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) +{ + struct rb_node **new = &(root->rb_node), *parent = NULL; + struct nfs4_client *clp; + + while (*new) { + clp = rb_entry(*new, struct nfs4_client, cl_namenode); + parent = *new; + + if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) + new = &((*new)->rb_left); + else + new = &((*new)->rb_right); + } + + rb_link_node(&new_clp->cl_namenode, parent, new); + rb_insert_color(&new_clp->cl_namenode, root); +} + +static struct nfs4_client * +find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) +{ + long long cmp; + struct rb_node *node = root->rb_node; + struct nfs4_client *clp; + + while (node) { + clp = rb_entry(node, struct nfs4_client, cl_namenode); + cmp = compare_blob(&clp->cl_name, name); + if (cmp > 0) + node = node->rb_left; + else if (cmp < 0) + node = node->rb_right; + else + return clp; + } + return NULL; +} + +static void +add_to_unconfirmed(struct nfs4_client *clp) { unsigned int idhashval; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); - list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); + clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); + add_clp_to_name_tree(clp, &nn->unconf_name_tree); idhashval = clientid_hashval(clp->cl_clientid.cl_id); - list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); + list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); renew_client(clp); } @@ -1339,22 +1372,23 @@ static void move_to_confirmed(struct nfs4_client *clp) { unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); - unsigned int strhashval; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); - list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); - strhashval = clientstr_hashval(clp->cl_recdir); - list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); + list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); + rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); + add_clp_to_name_tree(clp, &nn->conf_name_tree); + set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); renew_client(clp); } static struct nfs4_client * -find_confirmed_client(clientid_t *clid, bool sessions) +find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) { struct nfs4_client *clp; unsigned int idhashval = clientid_hashval(clid->cl_id); - list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { + list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { if (same_clid(&clp->cl_clientid, clid)) { if ((bool)clp->cl_minorversion != sessions) return NULL; @@ -1366,12 +1400,12 @@ find_confirmed_client(clientid_t *clid, bool sessions) } static struct nfs4_client * -find_unconfirmed_client(clientid_t *clid, bool sessions) +find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) { struct nfs4_client *clp; unsigned int idhashval = clientid_hashval(clid->cl_id); - list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { + list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) { if (same_clid(&clp->cl_clientid, clid)) { if ((bool)clp->cl_minorversion != sessions) return NULL; @@ -1387,27 +1421,15 @@ static bool clp_used_exchangeid(struct nfs4_client *clp) } static struct nfs4_client * -find_confirmed_client_by_str(const char *dname, unsigned int hashval) +find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) { - struct nfs4_client *clp; - - list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { - if (same_name(clp->cl_recdir, dname)) - return clp; - } - return NULL; + return find_clp_in_name_tree(name, &nn->conf_name_tree); } static struct nfs4_client * -find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) +find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) { - struct nfs4_client *clp; - - list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { - if (same_name(clp->cl_recdir, dname)) - return clp; - } - return NULL; + return find_clp_in_name_tree(name, &nn->unconf_name_tree); } static void @@ -1428,7 +1450,7 @@ gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_r else goto out_err; - conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, + conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, se->se_callback_addr_len, (struct sockaddr *)&conn->cb_addr, sizeof(conn->cb_addr)); @@ -1572,12 +1594,11 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, { struct nfs4_client *unconf, *conf, *new; __be32 status; - unsigned int strhashval; - char dname[HEXDIR_LEN]; char addr_str[INET6_ADDRSTRLEN]; nfs4_verifier verf = exid->verifier; struct sockaddr *sa = svc_addr(rqstp); bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); rpc_ntop(sa, addr_str, sizeof(addr_str)); dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " @@ -1592,24 +1613,16 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, switch (exid->spa_how) { case SP4_NONE: break; + default: /* checked by xdr code */ + WARN_ON_ONCE(1); case SP4_SSV: - return nfserr_serverfault; - default: - BUG(); /* checked by xdr code */ case SP4_MACH_CRED: return nfserr_serverfault; /* no excuse :-/ */ } - status = nfs4_make_rec_clidname(dname, &exid->clname); - - if (status) - return status; - - strhashval = clientstr_hashval(dname); - /* Cases below refer to rfc 5661 section 18.35.4: */ nfs4_lock_state(); - conf = find_confirmed_client_by_str(dname, strhashval); + conf = find_confirmed_client_by_name(&exid->clname, nn); if (conf) { bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); bool verfs_match = same_verf(&verf, &conf->cl_verifier); @@ -1654,21 +1667,21 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, goto out; } - unconf = find_unconfirmed_client_by_str(dname, strhashval); + unconf = find_unconfirmed_client_by_name(&exid->clname, nn); if (unconf) /* case 4, possible retry or client restart */ expire_client(unconf); /* case 1 (normal case) */ out_new: - new = create_client(exid->clname, dname, rqstp, &verf); + new = create_client(exid->clname, rqstp, &verf); if (new == NULL) { status = nfserr_jukebox; goto out; } new->cl_minorversion = 1; - gen_clid(new); - add_to_unconfirmed(new, strhashval); + gen_clid(new, nn); + add_to_unconfirmed(new); out_copy: exid->clientid.cl_boot = new->cl_clientid.cl_boot; exid->clientid.cl_id = new->cl_clientid.cl_id; @@ -1761,12 +1774,13 @@ nfsd4_create_session(struct svc_rqst *rqstp, struct nfsd4_conn *conn; struct nfsd4_clid_slot *cs_slot = NULL; __be32 status = 0; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) return nfserr_inval; if (check_forechannel_attrs(cr_ses->fore_channel)) return nfserr_toosmall; - new = alloc_session(&cr_ses->fore_channel); + new = alloc_session(&cr_ses->fore_channel, nn); if (!new) return nfserr_jukebox; status = nfserr_jukebox; @@ -1775,8 +1789,8 @@ nfsd4_create_session(struct svc_rqst *rqstp, goto out_free_session; nfs4_lock_state(); - unconf = find_unconfirmed_client(&cr_ses->clientid, true); - conf = find_confirmed_client(&cr_ses->clientid, true); + unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); + conf = find_confirmed_client(&cr_ses->clientid, true, nn); if (conf) { cs_slot = &conf->cl_cs_slot; @@ -1789,7 +1803,6 @@ nfsd4_create_session(struct svc_rqst *rqstp, goto out_free_conn; } } else if (unconf) { - unsigned int hash; struct nfs4_client *old; if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { @@ -1803,8 +1816,7 @@ nfsd4_create_session(struct svc_rqst *rqstp, status = nfserr_seq_misordered; goto out_free_conn; } - hash = clientstr_hashval(unconf->cl_recdir); - old = find_confirmed_client_by_str(unconf->cl_recdir, hash); + old = find_confirmed_client_by_name(&unconf->cl_name, nn); if (old) expire_client(old); move_to_confirmed(unconf); @@ -1843,14 +1855,6 @@ out_free_session: goto out; } -static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) -{ - struct nfsd4_compoundres *resp = rqstp->rq_resp; - struct nfsd4_compoundargs *argp = rqstp->rq_argp; - - return argp->opcnt == resp->opcnt; -} - static __be32 nfsd4_map_bcts_dir(u32 *dir) { switch (*dir) { @@ -1865,24 +1869,40 @@ static __be32 nfsd4_map_bcts_dir(u32 *dir) return nfserr_inval; } +__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) +{ + struct nfsd4_session *session = cstate->session; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + + spin_lock(&nn->client_lock); + session->se_cb_prog = bc->bc_cb_program; + session->se_cb_sec = bc->bc_cb_sec; + spin_unlock(&nn->client_lock); + + nfsd4_probe_callback(session->se_client); + + return nfs_ok; +} + __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_bind_conn_to_session *bcts) { __be32 status; struct nfsd4_conn *conn; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); if (!nfsd4_last_compound_op(rqstp)) return nfserr_not_only_op; - spin_lock(&client_lock); - cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); + spin_lock(&nn->client_lock); + cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); /* Sorta weird: we only need the refcnt'ing because new_conn acquires * client_lock iself: */ if (cstate->session) { nfsd4_get_session(cstate->session); atomic_inc(&cstate->session->se_client->cl_refcount); } - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); if (!cstate->session) return nfserr_badsession; @@ -1910,6 +1930,7 @@ nfsd4_destroy_session(struct svc_rqst *r, { struct nfsd4_session *ses; __be32 status = nfserr_badsession; + struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); /* Notes: * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid @@ -1923,24 +1944,24 @@ nfsd4_destroy_session(struct svc_rqst *r, return nfserr_not_only_op; } dump_sessionid(__func__, &sessionid->sessionid); - spin_lock(&client_lock); - ses = find_in_sessionid_hashtbl(&sessionid->sessionid); + spin_lock(&nn->client_lock); + ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); if (!ses) { - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); goto out; } unhash_session(ses); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); nfs4_lock_state(); nfsd4_probe_callback_sync(ses->se_client); nfs4_unlock_state(); - spin_lock(&client_lock); + spin_lock(&nn->client_lock); nfsd4_del_conns(ses); nfsd4_put_session_locked(ses); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); status = nfs_ok; out: dprintk("%s returns %d\n", __func__, ntohl(status)); @@ -2006,6 +2027,7 @@ nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_slot *slot; struct nfsd4_conn *conn; __be32 status; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); if (resp->opcnt != 1) return nfserr_sequence_pos; @@ -2018,9 +2040,9 @@ nfsd4_sequence(struct svc_rqst *rqstp, if (!conn) return nfserr_jukebox; - spin_lock(&client_lock); + spin_lock(&nn->client_lock); status = nfserr_badsession; - session = find_in_sessionid_hashtbl(&seq->sessionid); + session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); if (!session) goto out; @@ -2094,7 +2116,7 @@ out: } } kfree(conn); - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); dprintk("%s: return %d\n", __func__, ntohl(status)); return status; } @@ -2104,10 +2126,11 @@ nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *csta { struct nfs4_client *conf, *unconf, *clp; __be32 status = 0; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); nfs4_lock_state(); - unconf = find_unconfirmed_client(&dc->clientid, true); - conf = find_confirmed_client(&dc->clientid, true); + unconf = find_unconfirmed_client(&dc->clientid, true, nn); + conf = find_confirmed_client(&dc->clientid, true, nn); if (conf) { clp = conf; @@ -2181,20 +2204,13 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, { struct xdr_netobj clname = setclid->se_name; nfs4_verifier clverifier = setclid->se_verf; - unsigned int strhashval; struct nfs4_client *conf, *unconf, *new; __be32 status; - char dname[HEXDIR_LEN]; - - status = nfs4_make_rec_clidname(dname, &clname); - if (status) - return status; - - strhashval = clientstr_hashval(dname); + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); /* Cases below refer to rfc 3530 section 14.2.33: */ nfs4_lock_state(); - conf = find_confirmed_client_by_str(dname, strhashval); + conf = find_confirmed_client_by_name(&clname, nn); if (conf) { /* case 0: */ status = nfserr_clid_inuse; @@ -2209,21 +2225,21 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, goto out; } } - unconf = find_unconfirmed_client_by_str(dname, strhashval); + unconf = find_unconfirmed_client_by_name(&clname, nn); if (unconf) expire_client(unconf); status = nfserr_jukebox; - new = create_client(clname, dname, rqstp, &clverifier); + new = create_client(clname, rqstp, &clverifier); if (new == NULL) goto out; if (conf && same_verf(&conf->cl_verifier, &clverifier)) /* case 1: probable callback update */ copy_clid(new, conf); else /* case 4 (new client) or cases 2, 3 (client reboot): */ - gen_clid(new); + gen_clid(new, nn); new->cl_minorversion = 0; gen_callback(new, setclid, rqstp); - add_to_unconfirmed(new, strhashval); + add_to_unconfirmed(new); setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; setclid->se_clientid.cl_id = new->cl_clientid.cl_id; memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); @@ -2243,14 +2259,14 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, nfs4_verifier confirm = setclientid_confirm->sc_confirm; clientid_t * clid = &setclientid_confirm->sc_clientid; __be32 status; - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); if (STALE_CLIENTID(clid, nn)) return nfserr_stale_clientid; nfs4_lock_state(); - conf = find_confirmed_client(clid, false); - unconf = find_unconfirmed_client(clid, false); + conf = find_confirmed_client(clid, false, nn); + unconf = find_unconfirmed_client(clid, false, nn); /* * We try hard to give out unique clientid's, so if we get an * attempt to confirm the same clientid with a different cred, @@ -2276,9 +2292,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, nfsd4_probe_callback(conf); expire_client(unconf); } else { /* case 3: normal case; new or rebooted client */ - unsigned int hash = clientstr_hashval(unconf->cl_recdir); - - conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); + conf = find_confirmed_client_by_name(&unconf->cl_name, nn); if (conf) expire_client(conf); move_to_confirmed(unconf); @@ -2340,7 +2354,7 @@ nfsd4_init_slabs(void) if (openowner_slab == NULL) goto out_nomem; lockowner_slab = kmem_cache_create("nfsd4_lockowners", - sizeof(struct nfs4_openowner), 0, 0, NULL); + sizeof(struct nfs4_lockowner), 0, 0, NULL); if (lockowner_slab == NULL) goto out_nomem; file_slab = kmem_cache_create("nfsd4_files", @@ -2404,7 +2418,9 @@ static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) { - list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); + + list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); list_add(&oo->oo_perclient, &clp->cl_openowners); } @@ -2444,11 +2460,13 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, } static void -move_to_close_lru(struct nfs4_openowner *oo) +move_to_close_lru(struct nfs4_openowner *oo, struct net *net) { + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); - list_move_tail(&oo->oo_close_lru, &close_lru); + list_move_tail(&oo->oo_close_lru, &nn->close_lru); oo->oo_time = get_seconds(); } @@ -2462,13 +2480,14 @@ same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, } static struct nfs4_openowner * -find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions) +find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, + bool sessions, struct nfsd_net *nn) { struct nfs4_stateowner *so; struct nfs4_openowner *oo; struct nfs4_client *clp; - list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { + list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { if (!so->so_is_open_owner) continue; if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { @@ -2555,9 +2574,14 @@ static void nfsd_break_deleg_cb(struct file_lock *fl) struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; struct nfs4_delegation *dp; - BUG_ON(!fp); - /* We assume break_lease is only called once per lease: */ - BUG_ON(fp->fi_had_conflict); + if (!fp) { + WARN(1, "(%p)->fl_owner NULL\n", fl); + return; + } + if (fp->fi_had_conflict) { + WARN(1, "duplicate break on %p\n", fp); + return; + } /* * We don't want the locks code to timeout the lease for us; * we'll remove it ourself if a delegation isn't returned @@ -2599,14 +2623,13 @@ static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4 __be32 nfsd4_process_open1(struct nfsd4_compound_state *cstate, - struct nfsd4_open *open) + struct nfsd4_open *open, struct nfsd_net *nn) { clientid_t *clientid = &open->op_clientid; struct nfs4_client *clp = NULL; unsigned int strhashval; struct nfs4_openowner *oo = NULL; __be32 status; - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); if (STALE_CLIENTID(&open->op_clientid, nn)) return nfserr_stale_clientid; @@ -2619,10 +2642,11 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate, return nfserr_jukebox; strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); - oo = find_openstateowner_str(strhashval, open, cstate->minorversion); + oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); open->op_openowner = oo; if (!oo) { - clp = find_confirmed_client(clientid, cstate->minorversion); + clp = find_confirmed_client(clientid, cstate->minorversion, + nn); if (clp == NULL) return nfserr_expired; goto new_owner; @@ -2891,7 +2915,7 @@ static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) open->op_why_no_deleg = WND4_CANCELLED; break; case NFS4_SHARE_WANT_NO_DELEG: - BUG(); /* not supposed to get here */ + WARN_ON_ONCE(1); } } } @@ -2959,6 +2983,7 @@ out: } return; out_free: + unhash_stid(&dp->dl_stid); nfs4_put_delegation(dp); out_no_deleg: flag = NFS4_OPEN_DELEGATE_NONE; @@ -3104,27 +3129,32 @@ void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) free_generic_stateid(open->op_stp); } +static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) +{ + struct nfs4_client *found; + + if (STALE_CLIENTID(clid, nn)) + return nfserr_stale_clientid; + found = find_confirmed_client(clid, session, nn); + if (clp) + *clp = found; + return found ? nfs_ok : nfserr_expired; +} + __be32 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, clientid_t *clid) { struct nfs4_client *clp; __be32 status; - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); nfs4_lock_state(); dprintk("process_renew(%08x/%08x): starting\n", clid->cl_boot, clid->cl_id); - status = nfserr_stale_clientid; - if (STALE_CLIENTID(clid, nn)) - goto out; - clp = find_confirmed_client(clid, cstate->minorversion); - status = nfserr_expired; - if (clp == NULL) { - /* We assume the client took too long to RENEW. */ - dprintk("nfsd4_renew: clientid not found!\n"); + status = lookup_clientid(clid, cstate->minorversion, nn, &clp); + if (status) goto out; - } status = nfserr_cb_path_down; if (!list_empty(&clp->cl_delegations) && clp->cl_cb_state != NFSD4_CB_UP) @@ -3136,44 +3166,42 @@ out: } static void -nfsd4_end_grace(struct net *net) +nfsd4_end_grace(struct nfsd_net *nn) { - struct nfsd_net *nn = net_generic(net, nfsd_net_id); - /* do nothing if grace period already ended */ if (nn->grace_ended) return; dprintk("NFSD: end of grace period\n"); nn->grace_ended = true; - nfsd4_record_grace_done(net, nn->boot_time); + nfsd4_record_grace_done(nn, nn->boot_time); locks_end_grace(&nn->nfsd4_manager); /* * Now that every NFSv4 client has had the chance to recover and * to see the (possibly new, possibly shorter) lease time, we * can safely set the next grace time to the current lease time: */ - nfsd4_grace = nfsd4_lease; + nn->nfsd4_grace = nn->nfsd4_lease; } static time_t -nfs4_laundromat(void) +nfs4_laundromat(struct nfsd_net *nn) { struct nfs4_client *clp; struct nfs4_openowner *oo; struct nfs4_delegation *dp; struct list_head *pos, *next, reaplist; - time_t cutoff = get_seconds() - nfsd4_lease; - time_t t, clientid_val = nfsd4_lease; - time_t u, test_val = nfsd4_lease; + time_t cutoff = get_seconds() - nn->nfsd4_lease; + time_t t, clientid_val = nn->nfsd4_lease; + time_t u, test_val = nn->nfsd4_lease; nfs4_lock_state(); dprintk("NFSD: laundromat service - starting\n"); - nfsd4_end_grace(&init_net); + nfsd4_end_grace(nn); INIT_LIST_HEAD(&reaplist); - spin_lock(&client_lock); - list_for_each_safe(pos, next, &client_lru) { + spin_lock(&nn->client_lock); + list_for_each_safe(pos, next, &nn->client_lru) { clp = list_entry(pos, struct nfs4_client, cl_lru); if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { t = clp->cl_time - cutoff; @@ -3189,7 +3217,7 @@ nfs4_laundromat(void) unhash_client_locked(clp); list_add(&clp->cl_lru, &reaplist); } - spin_unlock(&client_lock); + spin_unlock(&nn->client_lock); list_for_each_safe(pos, next, &reaplist) { clp = list_entry(pos, struct nfs4_client, cl_lru); dprintk("NFSD: purging unused client (clientid %08x)\n", @@ -3199,6 +3227,8 @@ nfs4_laundromat(void) spin_lock(&recall_lock); list_for_each_safe(pos, next, &del_recall_lru) { dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); + if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) + continue; if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { u = dp->dl_time - cutoff; if (test_val > u) @@ -3212,8 +3242,8 @@ nfs4_laundromat(void) dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); unhash_delegation(dp); } - test_val = nfsd4_lease; - list_for_each_safe(pos, next, &close_lru) { + test_val = nn->nfsd4_lease; + list_for_each_safe(pos, next, &nn->close_lru) { oo = container_of(pos, struct nfs4_openowner, oo_close_lru); if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { u = oo->oo_time - cutoff; @@ -3231,16 +3261,19 @@ nfs4_laundromat(void) static struct workqueue_struct *laundry_wq; static void laundromat_main(struct work_struct *); -static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); static void -laundromat_main(struct work_struct *not_used) +laundromat_main(struct work_struct *laundry) { time_t t; + struct delayed_work *dwork = container_of(laundry, struct delayed_work, + work); + struct nfsd_net *nn = container_of(dwork, struct nfsd_net, + laundromat_work); - t = nfs4_laundromat(); + t = nfs4_laundromat(nn); dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); - queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); + queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); } static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) @@ -3385,16 +3418,17 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) return nfs_ok; } -static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions) +static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, + struct nfs4_stid **s, bool sessions, + struct nfsd_net *nn) { struct nfs4_client *cl; - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) return nfserr_bad_stateid; if (STALE_STATEID(stateid, nn)) return nfserr_stale_stateid; - cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions); + cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); if (!cl) return nfserr_expired; *s = find_stateid_by_type(cl, stateid, typemask); @@ -3416,6 +3450,7 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, struct nfs4_delegation *dp = NULL; struct svc_fh *current_fh = &cstate->current_fh; struct inode *ino = current_fh->fh_dentry->d_inode; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); __be32 status; if (filpp) @@ -3427,7 +3462,8 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) return check_special_stateids(net, current_fh, stateid, flags); - status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion); + status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, + &s, cstate->minorversion, nn); if (status) return status; status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); @@ -3441,7 +3477,11 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, goto out; if (filpp) { *filpp = dp->dl_file->fi_deleg_file; - BUG_ON(!*filpp); + if (!*filpp) { + WARN_ON_ONCE(1); + status = nfserr_serverfault; + goto out; + } } break; case NFS4_OPEN_STID: @@ -3568,7 +3608,8 @@ static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_ static __be32 nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, char typemask, - struct nfs4_ol_stateid **stpp) + struct nfs4_ol_stateid **stpp, + struct nfsd_net *nn) { __be32 status; struct nfs4_stid *s; @@ -3577,7 +3618,8 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, seqid, STATEID_VAL(stateid)); *stpp = NULL; - status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion); + status = nfsd4_lookup_stateid(stateid, typemask, &s, + cstate->minorversion, nn); if (status) return status; *stpp = openlockstateid(s); @@ -3586,13 +3628,14 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); } -static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) +static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, + stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) { __be32 status; struct nfs4_openowner *oo; status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, - NFS4_OPEN_STID, stpp); + NFS4_OPEN_STID, stpp, nn); if (status) return status; oo = openowner((*stpp)->st_stateowner); @@ -3608,6 +3651,7 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, __be32 status; struct nfs4_openowner *oo; struct nfs4_ol_stateid *stp; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", (int)cstate->current_fh.fh_dentry->d_name.len, @@ -3621,7 +3665,7 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_seqid_op(cstate, oc->oc_seqid, &oc->oc_req_stateid, - NFS4_OPEN_STID, &stp); + NFS4_OPEN_STID, &stp, nn); if (status) goto out; oo = openowner(stp->st_stateowner); @@ -3664,7 +3708,7 @@ static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_ac case NFS4_SHARE_ACCESS_BOTH: break; default: - BUG(); + WARN_ON_ONCE(1); } } @@ -3685,6 +3729,7 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp, { __be32 status; struct nfs4_ol_stateid *stp; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", (int)cstate->current_fh.fh_dentry->d_name.len, @@ -3697,7 +3742,7 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp, nfs4_lock_state(); status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, - &od->od_stateid, &stp); + &od->od_stateid, &stp, nn); if (status) goto out; status = nfserr_inval; @@ -3760,6 +3805,8 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, __be32 status; struct nfs4_openowner *oo; struct nfs4_ol_stateid *stp; + struct net *net = SVC_NET(rqstp); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); dprintk("NFSD: nfsd4_close on file %.*s\n", (int)cstate->current_fh.fh_dentry->d_name.len, @@ -3769,7 +3816,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, &close->cl_stateid, NFS4_OPEN_STID|NFS4_CLOSED_STID, - &stp); + &stp, nn); if (status) goto out; oo = openowner(stp->st_stateowner); @@ -3791,7 +3838,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, * little while to handle CLOSE replay. */ if (list_empty(&oo->oo_owner.so_stateids)) - move_to_close_lru(oo); + move_to_close_lru(oo, SVC_NET(rqstp)); } } out: @@ -3807,15 +3854,15 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfs4_delegation *dp; stateid_t *stateid = &dr->dr_stateid; struct nfs4_stid *s; - struct inode *inode; __be32 status; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) return status; - inode = cstate->current_fh.fh_dentry->d_inode; nfs4_lock_state(); - status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); + status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, + cstate->minorversion, nn); if (status) goto out; dp = delegstateid(s); @@ -3833,8 +3880,6 @@ out: #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) -#define LOCKOWNER_INO_HASH_BITS 8 -#define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) static inline u64 @@ -3852,7 +3897,7 @@ last_byte_offset(u64 start, u64 len) { u64 end; - BUG_ON(!len); + WARN_ON_ONCE(!len); end = start + len; return end > start ? end - 1: NFS4_MAX_UINT64; } @@ -3864,8 +3909,6 @@ static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct & LOCKOWNER_INO_HASH_MASK; } -static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; - /* * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that * we can't properly handle lock requests that go beyond the (2^63 - 1)-th @@ -3931,12 +3974,12 @@ static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, c static struct nfs4_lockowner * find_lockowner_str(struct inode *inode, clientid_t *clid, - struct xdr_netobj *owner) + struct xdr_netobj *owner, struct nfsd_net *nn) { unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); struct nfs4_lockowner *lo; - list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { + list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { if (same_lockowner_ino(lo, inode, clid, owner)) return lo; } @@ -3948,9 +3991,10 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s struct inode *inode = open_stp->st_file->fi_inode; unsigned int inohash = lockowner_ino_hashval(inode, clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); - list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); - list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); + list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); + list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); list_add(&lo->lo_perstateid, &open_stp->st_lockowners); } @@ -4024,8 +4068,10 @@ static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, s struct nfs4_client *cl = oo->oo_owner.so_client; struct nfs4_lockowner *lo; unsigned int strhashval; + struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); - lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); + lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, + &lock->v.new.owner, nn); if (lo) { if (!cstate->minorversion) return nfserr_bad_seqid; @@ -4065,7 +4111,8 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, bool new_state = false; int lkflg; int err; - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + struct net *net = SVC_NET(rqstp); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", (long long) lock->lk_offset, @@ -4099,7 +4146,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_confirmed_seqid_op(cstate, lock->lk_new_open_seqid, &lock->lk_new_open_stateid, - &open_stp); + &open_stp, nn); if (status) goto out; open_sop = openowner(open_stp->st_stateowner); @@ -4113,7 +4160,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, status = nfs4_preprocess_seqid_op(cstate, lock->lk_old_lock_seqid, &lock->lk_old_lock_stateid, - NFS4_LOCK_STID, &lock_stp); + NFS4_LOCK_STID, &lock_stp, nn); if (status) goto out; lock_sop = lockowner(lock_stp->st_stateowner); @@ -4124,10 +4171,10 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, goto out; status = nfserr_grace; - if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) + if (locks_in_grace(net) && !lock->lk_reclaim) goto out; status = nfserr_no_grace; - if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) + if (!locks_in_grace(net) && lock->lk_reclaim) goto out; file_lock = locks_alloc_lock(); @@ -4238,7 +4285,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct file_lock *file_lock = NULL; struct nfs4_lockowner *lo; __be32 status; - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); if (locks_in_grace(SVC_NET(rqstp))) return nfserr_grace; @@ -4248,9 +4295,11 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, nfs4_lock_state(); - status = nfserr_stale_clientid; - if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) - goto out; + if (!nfsd4_has_session(cstate)) { + status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); + if (status) + goto out; + } if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) goto out; @@ -4278,7 +4327,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, goto out; } - lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); + lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); if (lo) file_lock->fl_owner = (fl_owner_t)lo; file_lock->fl_pid = current->tgid; @@ -4313,7 +4362,8 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct file_lock *file_lock = NULL; __be32 status; int err; - + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); + dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", (long long) locku->lu_offset, (long long) locku->lu_length); @@ -4324,7 +4374,8 @@ nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, nfs4_lock_state(); status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, - &locku->lu_stateid, NFS4_LOCK_STID, &stp); + &locku->lu_stateid, NFS4_LOCK_STID, + &stp, nn); if (status) goto out; filp = find_any_file(stp->st_file); @@ -4414,23 +4465,21 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp, struct list_head matches; unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); __be32 status; - struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", clid->cl_boot, clid->cl_id); - /* XXX check for lease expiration */ - - status = nfserr_stale_clientid; - if (STALE_CLIENTID(clid, nn)) - return status; - nfs4_lock_state(); + status = lookup_clientid(clid, cstate->minorversion, nn, NULL); + if (status) + goto out; + status = nfserr_locks_held; INIT_LIST_HEAD(&matches); - list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { + list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { if (sop->so_is_open_owner) continue; if (!same_owner_str(sop, owner, clid)) @@ -4466,73 +4515,74 @@ alloc_reclaim(void) return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); } -int -nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) +bool +nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) { - unsigned int strhashval = clientstr_hashval(name); - struct nfs4_client *clp; + struct nfs4_client_reclaim *crp; - clp = find_confirmed_client_by_str(name, strhashval); - if (!clp) - return 0; - return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); + crp = nfsd4_find_reclaim_client(name, nn); + return (crp && crp->cr_clp); } /* * failure => all reset bets are off, nfserr_no_grace... */ -int -nfs4_client_to_reclaim(const char *name) +struct nfs4_client_reclaim * +nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) { unsigned int strhashval; - struct nfs4_client_reclaim *crp = NULL; + struct nfs4_client_reclaim *crp; dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); crp = alloc_reclaim(); - if (!crp) - return 0; - strhashval = clientstr_hashval(name); - INIT_LIST_HEAD(&crp->cr_strhash); - list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); - memcpy(crp->cr_recdir, name, HEXDIR_LEN); - reclaim_str_hashtbl_size++; - return 1; + if (crp) { + strhashval = clientstr_hashval(name); + INIT_LIST_HEAD(&crp->cr_strhash); + list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); + memcpy(crp->cr_recdir, name, HEXDIR_LEN); + crp->cr_clp = NULL; + nn->reclaim_str_hashtbl_size++; + } + return crp; +} + +void +nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) +{ + list_del(&crp->cr_strhash); + kfree(crp); + nn->reclaim_str_hashtbl_size--; } void -nfs4_release_reclaim(void) +nfs4_release_reclaim(struct nfsd_net *nn) { struct nfs4_client_reclaim *crp = NULL; int i; for (i = 0; i < CLIENT_HASH_SIZE; i++) { - while (!list_empty(&reclaim_str_hashtbl[i])) { - crp = list_entry(reclaim_str_hashtbl[i].next, + while (!list_empty(&nn->reclaim_str_hashtbl[i])) { + crp = list_entry(nn->reclaim_str_hashtbl[i].next, struct nfs4_client_reclaim, cr_strhash); - list_del(&crp->cr_strhash); - kfree(crp); - reclaim_str_hashtbl_size--; + nfs4_remove_reclaim_record(crp, nn); } } - BUG_ON(reclaim_str_hashtbl_size); + WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); } /* * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ struct nfs4_client_reclaim * -nfsd4_find_reclaim_client(struct nfs4_client *clp) +nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) { unsigned int strhashval; struct nfs4_client_reclaim *crp = NULL; - dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", - clp->cl_name.len, clp->cl_name.data, - clp->cl_recdir); + dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); - /* find clp->cl_name in reclaim_str_hashtbl */ - strhashval = clientstr_hashval(clp->cl_recdir); - list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { - if (same_name(crp->cr_recdir, clp->cl_recdir)) { + strhashval = clientstr_hashval(recdir); + list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { + if (same_name(crp->cr_recdir, recdir)) { return crp; } } @@ -4543,12 +4593,12 @@ nfsd4_find_reclaim_client(struct nfs4_client *clp) * Called from OPEN. Look for clientid in reclaim list. */ __be32 -nfs4_check_open_reclaim(clientid_t *clid, bool sessions) +nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) { struct nfs4_client *clp; /* find clientid in conf_id_hashtbl */ - clp = find_confirmed_client(clid, sessions); + clp = find_confirmed_client(clid, sessions, nn); if (clp == NULL) return nfserr_reclaim_bad; @@ -4557,124 +4607,177 @@ nfs4_check_open_reclaim(clientid_t *clid, bool sessions) #ifdef CONFIG_NFSD_FAULT_INJECTION -void nfsd_forget_clients(u64 num) +u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) { - struct nfs4_client *clp, *next; - int count = 0; - - nfs4_lock_state(); - list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { - expire_client(clp); - if (++count == num) - break; - } - nfs4_unlock_state(); - - printk(KERN_INFO "NFSD: Forgot %d clients", count); + expire_client(clp); + return 1; } -static void release_lockowner_sop(struct nfs4_stateowner *sop) +u64 nfsd_print_client(struct nfs4_client *clp, u64 num) { - release_lockowner(lockowner(sop)); + char buf[INET6_ADDRSTRLEN]; + rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); + printk(KERN_INFO "NFS Client: %s\n", buf); + return 1; } -static void release_openowner_sop(struct nfs4_stateowner *sop) +static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, + const char *type) { - release_openowner(openowner(sop)); + char buf[INET6_ADDRSTRLEN]; + rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); + printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); } -static int nfsd_release_n_owners(u64 num, bool is_open_owner, - void (*release_sop)(struct nfs4_stateowner *)) +static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) { - int i, count = 0; - struct nfs4_stateowner *sop, *next; + struct nfs4_openowner *oop; + struct nfs4_lockowner *lop, *lo_next; + struct nfs4_ol_stateid *stp, *st_next; + u64 count = 0; - for (i = 0; i < OWNER_HASH_SIZE; i++) { - list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { - if (sop->so_is_open_owner != is_open_owner) - continue; - release_sop(sop); - if (++count == num) - return count; + list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { + list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { + list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { + if (func) + func(lop); + if (++count == max) + return count; + } } } + return count; } -void nfsd_forget_locks(u64 num) +u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) { - int count; - - nfs4_lock_state(); - count = nfsd_release_n_owners(num, false, release_lockowner_sop); - nfs4_unlock_state(); + return nfsd_foreach_client_lock(clp, max, release_lockowner); +} - printk(KERN_INFO "NFSD: Forgot %d locks", count); +u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) +{ + u64 count = nfsd_foreach_client_lock(clp, max, NULL); + nfsd_print_count(clp, count, "locked files"); + return count; } -void nfsd_forget_openowners(u64 num) +static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) { - int count; + struct nfs4_openowner *oop, *next; + u64 count = 0; - nfs4_lock_state(); - count = nfsd_release_n_owners(num, true, release_openowner_sop); - nfs4_unlock_state(); + list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { + if (func) + func(oop); + if (++count == max) + break; + } - printk(KERN_INFO "NFSD: Forgot %d open owners", count); + return count; } -static int nfsd_process_n_delegations(u64 num, struct list_head *list) +u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) { - int i, count = 0; - struct nfs4_file *fp, *fnext; - struct nfs4_delegation *dp, *dnext; + return nfsd_foreach_client_open(clp, max, release_openowner); +} - for (i = 0; i < FILE_HASH_SIZE; i++) { - list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { - list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { - list_move(&dp->dl_recall_lru, list); - if (++count == num) - return count; - } - } - } +u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) +{ + u64 count = nfsd_foreach_client_open(clp, max, NULL); + nfsd_print_count(clp, count, "open files"); + return count; +} + +static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, + struct list_head *victims) +{ + struct nfs4_delegation *dp, *next; + u64 count = 0; + list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { + if (victims) + list_move(&dp->dl_recall_lru, victims); + if (++count == max) + break; + } return count; } -void nfsd_forget_delegations(u64 num) +u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) { - unsigned int count; + struct nfs4_delegation *dp, *next; LIST_HEAD(victims); - struct nfs4_delegation *dp, *dnext; + u64 count; spin_lock(&recall_lock); - count = nfsd_process_n_delegations(num, &victims); + count = nfsd_find_all_delegations(clp, max, &victims); spin_unlock(&recall_lock); - nfs4_lock_state(); - list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) + list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) unhash_delegation(dp); - nfs4_unlock_state(); - printk(KERN_INFO "NFSD: Forgot %d delegations", count); + return count; } -void nfsd_recall_delegations(u64 num) +u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) { - unsigned int count; + struct nfs4_delegation *dp, *next; LIST_HEAD(victims); - struct nfs4_delegation *dp, *dnext; + u64 count; spin_lock(&recall_lock); - count = nfsd_process_n_delegations(num, &victims); - list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { - list_del(&dp->dl_recall_lru); + count = nfsd_find_all_delegations(clp, max, &victims); + list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) nfsd_break_one_deleg(dp); - } spin_unlock(&recall_lock); - printk(KERN_INFO "NFSD: Recalled %d delegations", count); + return count; +} + +u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) +{ + u64 count = 0; + + spin_lock(&recall_lock); + count = nfsd_find_all_delegations(clp, max, NULL); + spin_unlock(&recall_lock); + + nfsd_print_count(clp, count, "delegations"); + return count; +} + +u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) +{ + struct nfs4_client *clp, *next; + u64 count = 0; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); + + if (!nfsd_netns_ready(nn)) + return 0; + + list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { + count += func(clp, max - count); + if ((max != 0) && (count >= max)) + break; + } + + return count; +} + +struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) +{ + struct nfs4_client *clp; + struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); + + if (!nfsd_netns_ready(nn)) + return NULL; + + list_for_each_entry(clp, &nn->client_lru, cl_lru) { + if (memcmp(&clp->cl_addr, addr, addr_size) == 0) + return clp; + } + return NULL; } #endif /* CONFIG_NFSD_FAULT_INJECTION */ @@ -4686,27 +4789,10 @@ nfs4_state_init(void) { int i; - for (i = 0; i < CLIENT_HASH_SIZE; i++) { - INIT_LIST_HEAD(&conf_id_hashtbl[i]); - INIT_LIST_HEAD(&conf_str_hashtbl[i]); - INIT_LIST_HEAD(&unconf_str_hashtbl[i]); - INIT_LIST_HEAD(&unconf_id_hashtbl[i]); - INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); - } - for (i = 0; i < SESSION_HASH_SIZE; i++) - INIT_LIST_HEAD(&sessionid_hashtbl[i]); for (i = 0; i < FILE_HASH_SIZE; i++) { INIT_LIST_HEAD(&file_hashtbl[i]); } - for (i = 0; i < OWNER_HASH_SIZE; i++) { - INIT_LIST_HEAD(&ownerstr_hashtbl[i]); - } - for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) - INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); - INIT_LIST_HEAD(&close_lru); - INIT_LIST_HEAD(&client_lru); INIT_LIST_HEAD(&del_recall_lru); - reclaim_str_hashtbl_size = 0; } /* @@ -4730,12 +4816,100 @@ set_max_delegations(void) max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); } -/* initialization to perform when the nfsd service is started: */ +static int nfs4_state_create_net(struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + int i; + + nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * + CLIENT_HASH_SIZE, GFP_KERNEL); + if (!nn->conf_id_hashtbl) + goto err; + nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * + CLIENT_HASH_SIZE, GFP_KERNEL); + if (!nn->unconf_id_hashtbl) + goto err_unconf_id; + nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * + OWNER_HASH_SIZE, GFP_KERNEL); + if (!nn->ownerstr_hashtbl) + goto err_ownerstr; + nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * + LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); + if (!nn->lockowner_ino_hashtbl) + goto err_lockowner_ino; + nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * + SESSION_HASH_SIZE, GFP_KERNEL); + if (!nn->sessionid_hashtbl) + goto err_sessionid; + + for (i = 0; i < CLIENT_HASH_SIZE; i++) { + INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); + INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); + } + for (i = 0; i < OWNER_HASH_SIZE; i++) + INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); + for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) + INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); + for (i = 0; i < SESSION_HASH_SIZE; i++) + INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); + nn->conf_name_tree = RB_ROOT; + nn->unconf_name_tree = RB_ROOT; + INIT_LIST_HEAD(&nn->client_lru); + INIT_LIST_HEAD(&nn->close_lru); + spin_lock_init(&nn->client_lock); + + INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); + get_net(net); + + return 0; + +err_sessionid: + kfree(nn->lockowner_ino_hashtbl); +err_lockowner_ino: + kfree(nn->ownerstr_hashtbl); +err_ownerstr: + kfree(nn->unconf_id_hashtbl); +err_unconf_id: + kfree(nn->conf_id_hashtbl); +err: + return -ENOMEM; +} + +static void +nfs4_state_destroy_net(struct net *net) +{ + int i; + struct nfs4_client *clp = NULL; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + struct rb_node *node, *tmp; + + for (i = 0; i < CLIENT_HASH_SIZE; i++) { + while (!list_empty(&nn->conf_id_hashtbl[i])) { + clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); + destroy_client(clp); + } + } + + node = rb_first(&nn->unconf_name_tree); + while (node != NULL) { + tmp = node; + node = rb_next(tmp); + clp = rb_entry(tmp, struct nfs4_client, cl_namenode); + rb_erase(tmp, &nn->unconf_name_tree); + destroy_client(clp); + } + + kfree(nn->sessionid_hashtbl); + kfree(nn->lockowner_ino_hashtbl); + kfree(nn->ownerstr_hashtbl); + kfree(nn->unconf_id_hashtbl); + kfree(nn->conf_id_hashtbl); + put_net(net); +} int -nfs4_state_start(void) +nfs4_state_start_net(struct net *net) { - struct net *net = &init_net; struct nfsd_net *nn = net_generic(net, nfsd_net_id); int ret; @@ -4746,18 +4920,32 @@ nfs4_state_start(void) * to that instead and then do most of the rest of this on a per-net * basis. */ - get_net(net); + if (net != &init_net) + return -EINVAL; + + ret = nfs4_state_create_net(net); + if (ret) + return ret; nfsd4_client_tracking_init(net); nn->boot_time = get_seconds(); locks_start_grace(net, &nn->nfsd4_manager); nn->grace_ended = false; - printk(KERN_INFO "NFSD: starting %ld-second grace period\n", - nfsd4_grace); + printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", + nn->nfsd4_grace, net); + queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); + return 0; +} + +/* initialization to perform when the nfsd service is started: */ + +int +nfs4_state_start(void) +{ + int ret; + ret = set_callback_cred(); - if (ret) { - ret = -ENOMEM; - goto out_recovery; - } + if (ret) + return -ENOMEM; laundry_wq = create_singlethread_workqueue("nfsd4"); if (laundry_wq == NULL) { ret = -ENOMEM; @@ -4766,39 +4954,34 @@ nfs4_state_start(void) ret = nfsd4_create_callback_queue(); if (ret) goto out_free_laundry; - queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); + set_max_delegations(); + return 0; + out_free_laundry: destroy_workqueue(laundry_wq); out_recovery: - nfsd4_client_tracking_exit(net); - put_net(net); return ret; } -static void -__nfs4_state_shutdown(void) +/* should be called with the state lock held */ +void +nfs4_state_shutdown_net(struct net *net) { - int i; - struct nfs4_client *clp = NULL; struct nfs4_delegation *dp = NULL; struct list_head *pos, *next, reaplist; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + cancel_delayed_work_sync(&nn->laundromat_work); + locks_end_grace(&nn->nfsd4_manager); - for (i = 0; i < CLIENT_HASH_SIZE; i++) { - while (!list_empty(&conf_id_hashtbl[i])) { - clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); - destroy_client(clp); - } - while (!list_empty(&unconf_str_hashtbl[i])) { - clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); - destroy_client(clp); - } - } INIT_LIST_HEAD(&reaplist); spin_lock(&recall_lock); list_for_each_safe(pos, next, &del_recall_lru) { dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); + if (dp->dl_stid.sc_client->net != net) + continue; list_move(&dp->dl_recall_lru, &reaplist); } spin_unlock(&recall_lock); @@ -4807,22 +4990,14 @@ __nfs4_state_shutdown(void) unhash_delegation(dp); } - nfsd4_client_tracking_exit(&init_net); - put_net(&init_net); + nfsd4_client_tracking_exit(net); + nfs4_state_destroy_net(net); } void nfs4_state_shutdown(void) { - struct net *net = &init_net; - struct nfsd_net *nn = net_generic(net, nfsd_net_id); - - cancel_delayed_work_sync(&laundromat_work); destroy_workqueue(laundry_wq); - locks_end_grace(&nn->nfsd4_manager); - nfs4_lock_state(); - __nfs4_state_shutdown(); - nfs4_unlock_state(); nfsd4_destroy_callback_queue(); } diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index fd548d15508..0dc11586682 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -53,6 +53,7 @@ #include "vfs.h" #include "state.h" #include "cache.h" +#include "netns.h" #define NFSDDBG_FACILITY NFSDDBG_XDR @@ -65,17 +66,17 @@ #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL static __be32 -check_filename(char *str, int len, __be32 err) +check_filename(char *str, int len) { int i; if (len == 0) return nfserr_inval; if (isdotent(str, len)) - return err; + return nfserr_badname; for (i = 0; i < len; i++) if (str[i] == '/') - return err; + return nfserr_badname; return 0; } @@ -422,6 +423,86 @@ nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access DECODE_TAIL; } +static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) +{ + DECODE_HEAD; + u32 dummy, uid, gid; + char *machine_name; + int i; + int nr_secflavs; + + /* callback_sec_params4 */ + READ_BUF(4); + READ32(nr_secflavs); + cbs->flavor = (u32)(-1); + for (i = 0; i < nr_secflavs; ++i) { + READ_BUF(4); + READ32(dummy); + switch (dummy) { + case RPC_AUTH_NULL: + /* Nothing to read */ + if (cbs->flavor == (u32)(-1)) + cbs->flavor = RPC_AUTH_NULL; + break; + case RPC_AUTH_UNIX: + READ_BUF(8); + /* stamp */ + READ32(dummy); + + /* machine name */ + READ32(dummy); + READ_BUF(dummy); + SAVEMEM(machine_name, dummy); + + /* uid, gid */ + READ_BUF(8); + READ32(uid); + READ32(gid); + + /* more gids */ + READ_BUF(4); + READ32(dummy); + READ_BUF(dummy * 4); + if (cbs->flavor == (u32)(-1)) { + cbs->uid = uid; + cbs->gid = gid; + cbs->flavor = RPC_AUTH_UNIX; + } + break; + case RPC_AUTH_GSS: + dprintk("RPC_AUTH_GSS callback secflavor " + "not supported!\n"); + READ_BUF(8); + /* gcbp_service */ + READ32(dummy); + /* gcbp_handle_from_server */ + READ32(dummy); + READ_BUF(dummy); + p += XDR_QUADLEN(dummy); + /* gcbp_handle_from_client */ + READ_BUF(4); + READ32(dummy); + READ_BUF(dummy); + break; + default: + dprintk("Illegal callback secflavor\n"); + return nfserr_inval; + } + } + DECODE_TAIL; +} + +static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) +{ + DECODE_HEAD; + + READ_BUF(4); + READ32(bc->bc_cb_program); + nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); + + DECODE_TAIL; +} + static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) { DECODE_HEAD; @@ -490,7 +571,7 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create READ32(create->cr_namelen); READ_BUF(create->cr_namelen); SAVEMEM(create->cr_name, create->cr_namelen); - if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) + if ((status = check_filename(create->cr_name, create->cr_namelen))) return status; status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, @@ -522,7 +603,7 @@ nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) READ32(link->li_namelen); READ_BUF(link->li_namelen); SAVEMEM(link->li_name, link->li_namelen); - if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) + if ((status = check_filename(link->li_name, link->li_namelen))) return status; DECODE_TAIL; @@ -616,7 +697,7 @@ nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup READ32(lookup->lo_len); READ_BUF(lookup->lo_len); SAVEMEM(lookup->lo_name, lookup->lo_len); - if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) + if ((status = check_filename(lookup->lo_name, lookup->lo_len))) return status; DECODE_TAIL; @@ -780,7 +861,7 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) READ32(open->op_fname.len); READ_BUF(open->op_fname.len); SAVEMEM(open->op_fname.data, open->op_fname.len); - if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) + if ((status = check_filename(open->op_fname.data, open->op_fname.len))) return status; break; case NFS4_OPEN_CLAIM_PREVIOUS: @@ -795,7 +876,7 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) READ32(open->op_fname.len); READ_BUF(open->op_fname.len); SAVEMEM(open->op_fname.data, open->op_fname.len); - if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) + if ((status = check_filename(open->op_fname.data, open->op_fname.len))) return status; break; case NFS4_OPEN_CLAIM_FH: @@ -907,7 +988,7 @@ nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove READ32(remove->rm_namelen); READ_BUF(remove->rm_namelen); SAVEMEM(remove->rm_name, remove->rm_namelen); - if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) + if ((status = check_filename(remove->rm_name, remove->rm_namelen))) return status; DECODE_TAIL; @@ -925,9 +1006,9 @@ nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename READ32(rename->rn_tnamelen); READ_BUF(rename->rn_tnamelen); SAVEMEM(rename->rn_tname, rename->rn_tnamelen); - if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) + if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) return status; - if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) + if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) return status; DECODE_TAIL; @@ -954,8 +1035,7 @@ nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, READ32(secinfo->si_namelen); READ_BUF(secinfo->si_namelen); SAVEMEM(secinfo->si_name, secinfo->si_namelen); - status = check_filename(secinfo->si_name, secinfo->si_namelen, - nfserr_noent); + status = check_filename(secinfo->si_name, secinfo->si_namelen); if (status) return status; DECODE_TAIL; @@ -1026,31 +1106,14 @@ nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_s static __be32 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) { -#if 0 - struct nfsd4_compoundargs save = { - .p = argp->p, - .end = argp->end, - .rqstp = argp->rqstp, - }; - u32 ve_bmval[2]; - struct iattr ve_iattr; /* request */ - struct nfs4_acl *ve_acl; /* request */ -#endif DECODE_HEAD; if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) goto out; /* For convenience's sake, we compare raw xdr'd attributes in - * nfsd4_proc_verify; however we still decode here just to return - * correct error in case of bad xdr. */ -#if 0 - status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); - if (status == nfserr_inval) { - status = nfserrno(status); - goto out; - } -#endif + * nfsd4_proc_verify */ + READ_BUF(4); READ32(verify->ve_attrlen); READ_BUF(verify->ve_attrlen); @@ -1063,7 +1126,6 @@ static __be32 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) { int avail; - int v; int len; DECODE_HEAD; @@ -1087,27 +1149,26 @@ nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) __FILE__, __LINE__); goto xdr_error; } - argp->rqstp->rq_vec[0].iov_base = p; - argp->rqstp->rq_vec[0].iov_len = avail; - v = 0; - len = write->wr_buflen; - while (len > argp->rqstp->rq_vec[v].iov_len) { - len -= argp->rqstp->rq_vec[v].iov_len; - v++; - argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); - argp->pagelist++; - if (argp->pagelen >= PAGE_SIZE) { - argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; - argp->pagelen -= PAGE_SIZE; - } else { - argp->rqstp->rq_vec[v].iov_len = argp->pagelen; - argp->pagelen -= len; - } + write->wr_head.iov_base = p; + write->wr_head.iov_len = avail; + WARN_ON(avail != (XDR_QUADLEN(avail) << 2)); + write->wr_pagelist = argp->pagelist; + + len = XDR_QUADLEN(write->wr_buflen) << 2; + if (len >= avail) { + int pages; + + len -= avail; + + pages = len >> PAGE_SHIFT; + argp->pagelist += pages; + argp->pagelen -= pages * PAGE_SIZE; + len -= pages * PAGE_SIZE; + + argp->p = (__be32 *)page_address(argp->pagelist[0]); + argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); } - argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); - argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); - argp->rqstp->rq_vec[v].iov_len = len; - write->wr_vlen = v+1; + argp->p += XDR_QUADLEN(len); DECODE_TAIL; } @@ -1237,11 +1298,7 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, struct nfsd4_create_session *sess) { DECODE_HEAD; - u32 dummy; - char *machine_name; - int i; - int nr_secflavs; READ_BUF(16); COPYMEM(&sess->clientid, 8); @@ -1282,58 +1339,9 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, goto xdr_error; } - READ_BUF(8); + READ_BUF(4); READ32(sess->callback_prog); - - /* callback_sec_params4 */ - READ32(nr_secflavs); - for (i = 0; i < nr_secflavs; ++i) { - READ_BUF(4); - READ32(dummy); - switch (dummy) { - case RPC_AUTH_NULL: - /* Nothing to read */ - break; - case RPC_AUTH_UNIX: - READ_BUF(8); - /* stamp */ - READ32(dummy); - - /* machine name */ - READ32(dummy); - READ_BUF(dummy); - SAVEMEM(machine_name, dummy); - - /* uid, gid */ - READ_BUF(8); - READ32(sess->uid); - READ32(sess->gid); - - /* more gids */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy * 4); - break; - case RPC_AUTH_GSS: - dprintk("RPC_AUTH_GSS callback secflavor " - "not supported!\n"); - READ_BUF(8); - /* gcbp_service */ - READ32(dummy); - /* gcbp_handle_from_server */ - READ32(dummy); - READ_BUF(dummy); - p += XDR_QUADLEN(dummy); - /* gcbp_handle_from_client */ - READ_BUF(4); - READ32(dummy); - READ_BUF(dummy); - break; - default: - dprintk("Illegal callback secflavor\n"); - return nfserr_inval; - } - } + nfsd4_decode_cb_sec(argp, &sess->cb_sec); DECODE_TAIL; } @@ -1528,7 +1536,7 @@ static nfsd4_dec nfsd41_dec_ops[] = { [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, /* new operations for NFSv4.1 */ - [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, + [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, @@ -1568,12 +1576,6 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp) bool cachethis = false; int i; - /* - * XXX: According to spec, we should check the tag - * for UTF-8 compliance. I'm postponing this for - * now because it seems that some clients do use - * binary tags. - */ READ_BUF(4); READ32(argp->taglen); READ_BUF(argp->taglen + 8); @@ -1603,38 +1605,8 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp) op = &argp->ops[i]; op->replay = NULL; - /* - * We can't use READ_BUF() here because we need to handle - * a missing opcode as an OP_WRITE + 1. So we need to check - * to see if we're truly at the end of our buffer or if there - * is another page we need to flip to. - */ - - if (argp->p == argp->end) { - if (argp->pagelen < 4) { - /* There isn't an opcode still on the wire */ - op->opnum = OP_WRITE + 1; - op->status = nfserr_bad_xdr; - argp->opcnt = i+1; - break; - } - - /* - * False alarm. We just hit a page boundary, but there - * is still data available. Move pointer across page - * boundary. *snip from READ_BUF* - */ - argp->p = page_address(argp->pagelist[0]); - argp->pagelist++; - if (argp->pagelen < PAGE_SIZE) { - argp->end = argp->p + (argp->pagelen>>2); - argp->pagelen = 0; - } else { - argp->end = argp->p + (PAGE_SIZE>>2); - argp->pagelen -= PAGE_SIZE; - } - } - op->opnum = ntohl(*argp->p++); + READ_BUF(4); + READ32(op->opnum); if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) op->status = ops->decoders[op->opnum](argp, &op->u); @@ -2014,6 +1986,22 @@ static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) return 0; } + +static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) +{ + struct path path = exp->ex_path; + int err; + + path_get(&path); + while (follow_up(&path)) { + if (path.dentry != path.mnt->mnt_root) + break; + } + err = vfs_getattr(path.mnt, path.dentry, stat); + path_put(&path); + return err; +} + /* * Note: @fhp can be NULL; in this case, we might have to compose the filehandle * ourselves. @@ -2048,6 +2036,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, .mnt = exp->ex_path.mnt, .dentry = dentry, }; + struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); @@ -2208,7 +2197,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, if (bmval0 & FATTR4_WORD0_LEASE_TIME) { if ((buflen -= 4) < 0) goto out_resource; - WRITE32(nfsd4_lease); + WRITE32(nn->nfsd4_lease); } if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { if ((buflen -= 4) < 0) @@ -2430,18 +2419,8 @@ out_acl: * and this is the root of a cross-mounted filesystem. */ if (ignore_crossmnt == 0 && - dentry == exp->ex_path.mnt->mnt_root) { - struct path path = exp->ex_path; - path_get(&path); - while (follow_up(&path)) { - if (path.dentry != path.mnt->mnt_root) - break; - } - err = vfs_getattr(path.mnt, path.dentry, &stat); - path_put(&path); - if (err) - goto out_nfserr; - } + dentry == exp->ex_path.mnt->mnt_root) + get_parent_attributes(exp, &stat); WRITE64(stat.ino); } if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { @@ -2927,7 +2906,8 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_read *read) { u32 eof; - int v, pn; + int v; + struct page *page; unsigned long maxcount; long len; __be32 *p; @@ -2946,11 +2926,15 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, len = maxcount; v = 0; while (len > 0) { - pn = resp->rqstp->rq_resused++; - resp->rqstp->rq_vec[v].iov_base = - page_address(resp->rqstp->rq_respages[pn]); + page = *(resp->rqstp->rq_next_page); + if (!page) { /* ran out of pages */ + maxcount -= len; + break; + } + resp->rqstp->rq_vec[v].iov_base = page_address(page); resp->rqstp->rq_vec[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE; + resp->rqstp->rq_next_page++; v++; len -= PAGE_SIZE; } @@ -2996,8 +2980,10 @@ nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd return nfserr; if (resp->xbuf->page_len) return nfserr_resource; + if (!*resp->rqstp->rq_next_page) + return nfserr_resource; - page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); + page = page_address(*(resp->rqstp->rq_next_page++)); maxcount = PAGE_SIZE; RESERVE_SPACE(4); @@ -3045,6 +3031,8 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4 return nfserr; if (resp->xbuf->page_len) return nfserr_resource; + if (!*resp->rqstp->rq_next_page) + return nfserr_resource; RESERVE_SPACE(NFS4_VERIFIER_SIZE); savep = p; @@ -3071,7 +3059,7 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4 goto err_no_verf; } - page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); + page = page_address(*(resp->rqstp->rq_next_page++)); readdir->common.err = 0; readdir->buflen = maxcount; readdir->buffer = page; @@ -3094,8 +3082,8 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4 p = readdir->buffer; *p++ = 0; /* no more entries */ *p++ = htonl(readdir->common.err == nfserr_eof); - resp->xbuf->page_len = ((char*)p) - (char*)page_address( - resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); + resp->xbuf->page_len = ((char*)p) - + (char*)page_address(*(resp->rqstp->rq_next_page-1)); /* Use rest of head for padding and remaining ops: */ resp->xbuf->tail[0].iov_base = tailbase; diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index dab350dfc37..74934284d9a 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -19,7 +19,7 @@ #include "idmap.h" #include "nfsd.h" #include "cache.h" -#include "fault_inject.h" +#include "state.h" #include "netns.h" /* @@ -186,9 +186,6 @@ static struct file_operations supported_enctypes_ops = { }; #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ -extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); -extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); - static const struct file_operations pool_stats_operations = { .open = nfsd_pool_stats_open, .read = seq_read, @@ -399,6 +396,8 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size) { char *mesg = buf; int rv; + struct net *net = &init_net; + if (size > 0) { int newthreads; rv = get_int(&mesg, &newthreads); @@ -406,11 +405,11 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size) return rv; if (newthreads < 0) return -EINVAL; - rv = nfsd_svc(newthreads); + rv = nfsd_svc(newthreads, net); if (rv < 0) return rv; } else - rv = nfsd_nrthreads(); + rv = nfsd_nrthreads(net); return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); } @@ -448,9 +447,10 @@ static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) int len; int npools; int *nthreads; + struct net *net = &init_net; mutex_lock(&nfsd_mutex); - npools = nfsd_nrpools(); + npools = nfsd_nrpools(net); if (npools == 0) { /* * NFS is shut down. The admin can start it by @@ -478,12 +478,12 @@ static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) if (nthreads[i] < 0) goto out_free; } - rv = nfsd_set_nrthreads(i, nthreads); + rv = nfsd_set_nrthreads(i, nthreads, net); if (rv) goto out_free; } - rv = nfsd_get_nrthreads(npools, nthreads); + rv = nfsd_get_nrthreads(npools, nthreads, net); if (rv) goto out_free; @@ -510,11 +510,13 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size) unsigned minor; ssize_t tlen = 0; char *sep; + struct net *net = &init_net; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); if (size>0) { - if (nfsd_serv) + if (nn->nfsd_serv) /* Cannot change versions without updating - * nfsd_serv->sv_xdrsize, and reallocing + * nn->nfsd_serv->sv_xdrsize, and reallocing * rq_argp and rq_resp */ return -EBUSY; @@ -645,11 +647,13 @@ static ssize_t write_versions(struct file *file, char *buf, size_t size) * Zero-length write. Return a list of NFSD's current listener * transports. */ -static ssize_t __write_ports_names(char *buf) +static ssize_t __write_ports_names(char *buf, struct net *net) { - if (nfsd_serv == NULL) + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + if (nn->nfsd_serv == NULL) return 0; - return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); + return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); } /* @@ -657,28 +661,28 @@ static ssize_t __write_ports_names(char *buf) * a socket of a supported family/protocol, and we use it as an * nfsd listener. */ -static ssize_t __write_ports_addfd(char *buf) +static ssize_t __write_ports_addfd(char *buf, struct net *net) { char *mesg = buf; int fd, err; - struct net *net = &init_net; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); err = get_int(&mesg, &fd); if (err != 0 || fd < 0) return -EINVAL; - err = nfsd_create_serv(); + err = nfsd_create_serv(net); if (err != 0) return err; - err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); + err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); if (err < 0) { nfsd_destroy(net); return err; } /* Decrease the count, but don't shut down the service */ - nfsd_serv->sv_nrthreads--; + nn->nfsd_serv->sv_nrthreads--; return err; } @@ -686,12 +690,12 @@ static ssize_t __write_ports_addfd(char *buf) * A transport listener is added by writing it's transport name and * a port number. */ -static ssize_t __write_ports_addxprt(char *buf) +static ssize_t __write_ports_addxprt(char *buf, struct net *net) { char transport[16]; struct svc_xprt *xprt; int port, err; - struct net *net = &init_net; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); if (sscanf(buf, "%15s %5u", transport, &port) != 2) return -EINVAL; @@ -699,25 +703,25 @@ static ssize_t __write_ports_addxprt(char *buf) if (port < 1 || port > USHRT_MAX) return -EINVAL; - err = nfsd_create_serv(); + err = nfsd_create_serv(net); if (err != 0) return err; - err = svc_create_xprt(nfsd_serv, transport, net, + err = svc_create_xprt(nn->nfsd_serv, transport, net, PF_INET, port, SVC_SOCK_ANONYMOUS); if (err < 0) goto out_err; - err = svc_create_xprt(nfsd_serv, transport, net, + err = svc_create_xprt(nn->nfsd_serv, transport, net, PF_INET6, port, SVC_SOCK_ANONYMOUS); if (err < 0 && err != -EAFNOSUPPORT) goto out_close; /* Decrease the count, but don't shut down the service */ - nfsd_serv->sv_nrthreads--; + nn->nfsd_serv->sv_nrthreads--; return 0; out_close: - xprt = svc_find_xprt(nfsd_serv, transport, net, PF_INET, port); + xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); if (xprt != NULL) { svc_close_xprt(xprt); svc_xprt_put(xprt); @@ -727,16 +731,17 @@ out_err: return err; } -static ssize_t __write_ports(struct file *file, char *buf, size_t size) +static ssize_t __write_ports(struct file *file, char *buf, size_t size, + struct net *net) { if (size == 0) - return __write_ports_names(buf); + return __write_ports_names(buf, net); if (isdigit(buf[0])) - return __write_ports_addfd(buf); + return __write_ports_addfd(buf, net); if (isalpha(buf[0])) - return __write_ports_addxprt(buf); + return __write_ports_addxprt(buf, net); return -EINVAL; } @@ -787,9 +792,10 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size) static ssize_t write_ports(struct file *file, char *buf, size_t size) { ssize_t rv; + struct net *net = &init_net; mutex_lock(&nfsd_mutex); - rv = __write_ports(file, buf, size); + rv = __write_ports(file, buf, size, net); mutex_unlock(&nfsd_mutex); return rv; } @@ -821,6 +827,9 @@ int nfsd_max_blksize; static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) { char *mesg = buf; + struct net *net = &init_net; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + if (size > 0) { int bsize; int rv = get_int(&mesg, &bsize); @@ -835,7 +844,7 @@ static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) bsize = NFSSVC_MAXBLKSIZE; bsize &= ~(1024-1); mutex_lock(&nfsd_mutex); - if (nfsd_serv) { + if (nn->nfsd_serv) { mutex_unlock(&nfsd_mutex); return -EBUSY; } @@ -848,13 +857,14 @@ static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) } #ifdef CONFIG_NFSD_V4 -static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) +static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, + time_t *time, struct nfsd_net *nn) { char *mesg = buf; int rv, i; if (size > 0) { - if (nfsd_serv) + if (nn->nfsd_serv) return -EBUSY; rv = get_int(&mesg, &i); if (rv) @@ -879,12 +889,13 @@ static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, tim return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); } -static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) +static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, + time_t *time, struct nfsd_net *nn) { ssize_t rv; mutex_lock(&nfsd_mutex); - rv = __nfsd4_write_time(file, buf, size, time); + rv = __nfsd4_write_time(file, buf, size, time, nn); mutex_unlock(&nfsd_mutex); return rv; } @@ -912,7 +923,8 @@ static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_ */ static ssize_t write_leasetime(struct file *file, char *buf, size_t size) { - return nfsd4_write_time(file, buf, size, &nfsd4_lease); + struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); } /** @@ -927,17 +939,19 @@ static ssize_t write_leasetime(struct file *file, char *buf, size_t size) */ static ssize_t write_gracetime(struct file *file, char *buf, size_t size) { - return nfsd4_write_time(file, buf, size, &nfsd4_grace); + struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); + return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); } -static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) +static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, + struct nfsd_net *nn) { char *mesg = buf; char *recdir; int len, status; if (size > 0) { - if (nfsd_serv) + if (nn->nfsd_serv) return -EBUSY; if (size > PATH_MAX || buf[size-1] != '\n') return -EINVAL; @@ -981,9 +995,10 @@ static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) { ssize_t rv; + struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); mutex_lock(&nfsd_mutex); - rv = __write_recoverydir(file, buf, size); + rv = __write_recoverydir(file, buf, size, nn); mutex_unlock(&nfsd_mutex); return rv; } @@ -1063,6 +1078,7 @@ int nfsd_net_id; static __net_init int nfsd_init_net(struct net *net) { int retval; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); retval = nfsd_export_init(net); if (retval) @@ -1070,6 +1086,8 @@ static __net_init int nfsd_init_net(struct net *net) retval = nfsd_idmap_init(net); if (retval) goto out_idmap_error; + nn->nfsd4_lease = 90; /* default lease time */ + nn->nfsd4_grace = 90; return 0; out_idmap_error: diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h index 80d5ce40aad..de23db255c6 100644 --- a/fs/nfsd/nfsd.h +++ b/fs/nfsd/nfsd.h @@ -55,7 +55,6 @@ extern struct svc_version nfsd_version2, nfsd_version3, nfsd_version4; extern u32 nfsd_supported_minorversion; extern struct mutex nfsd_mutex; -extern struct svc_serv *nfsd_serv; extern spinlock_t nfsd_drc_lock; extern unsigned int nfsd_drc_max_mem; extern unsigned int nfsd_drc_mem_used; @@ -65,26 +64,17 @@ extern const struct seq_operations nfs_exports_op; /* * Function prototypes. */ -int nfsd_svc(int nrservs); +int nfsd_svc(int nrservs, struct net *net); int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp); -int nfsd_nrthreads(void); -int nfsd_nrpools(void); -int nfsd_get_nrthreads(int n, int *); -int nfsd_set_nrthreads(int n, int *); +int nfsd_nrthreads(struct net *); +int nfsd_nrpools(struct net *); +int nfsd_get_nrthreads(int n, int *, struct net *); +int nfsd_set_nrthreads(int n, int *, struct net *); int nfsd_pool_stats_open(struct inode *, struct file *); int nfsd_pool_stats_release(struct inode *, struct file *); -static inline void nfsd_destroy(struct net *net) -{ - int destroy = (nfsd_serv->sv_nrthreads == 1); - - if (destroy) - svc_shutdown_net(nfsd_serv, net); - svc_destroy(nfsd_serv); - if (destroy) - nfsd_serv = NULL; -} +void nfsd_destroy(struct net *net); #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) #ifdef CONFIG_NFSD_V2_ACL @@ -103,7 +93,7 @@ enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL }; int nfsd_vers(int vers, enum vers_op change); int nfsd_minorversion(u32 minorversion, enum vers_op change); void nfsd_reset_versions(void); -int nfsd_create_serv(void); +int nfsd_create_serv(struct net *net); extern int nfsd_max_blksize; @@ -121,7 +111,9 @@ void nfs4_state_init(void); int nfsd4_init_slabs(void); void nfsd4_free_slabs(void); int nfs4_state_start(void); +int nfs4_state_start_net(struct net *net); void nfs4_state_shutdown(void); +void nfs4_state_shutdown_net(struct net *net); void nfs4_reset_lease(time_t leasetime); int nfs4_reset_recoverydir(char *recdir); char * nfs4_recoverydir(void); @@ -130,7 +122,9 @@ static inline void nfs4_state_init(void) { } static inline int nfsd4_init_slabs(void) { return 0; } static inline void nfsd4_free_slabs(void) { } static inline int nfs4_state_start(void) { return 0; } +static inline int nfs4_state_start_net(struct net *net) { return 0; } static inline void nfs4_state_shutdown(void) { } +static inline void nfs4_state_shutdown_net(struct net *net) { } static inline void nfs4_reset_lease(time_t leasetime) { } static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } static inline char * nfs4_recoverydir(void) {return NULL; } @@ -265,16 +259,8 @@ void nfsd_lockd_shutdown(void); /* Check for dir entries '.' and '..' */ #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.')) -/* - * Time of server startup - */ -extern struct timeval nfssvc_boot; - #ifdef CONFIG_NFSD_V4 -extern time_t nfsd4_lease; -extern time_t nfsd4_grace; - /* before processing a COMPOUND operation, we have to check that there * is enough space in the buffer for XDR encode to succeed. otherwise, * we might process an operation with side effects, and be unable to diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index 032af381b3a..814afaa4458 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -572,7 +572,7 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, if (inode) _fh_update(fhp, exp, dentry); - if (fhp->fh_handle.fh_fileid_type == 255) { + if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) { fh_put(fhp); return nfserr_opnotsupp; } @@ -603,7 +603,7 @@ fh_update(struct svc_fh *fhp) goto out; _fh_update(fhp, fhp->fh_export, dentry); - if (fhp->fh_handle.fh_fileid_type == 255) + if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) return nfserr_opnotsupp; } out: diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 2013aa001da..cee62ab9d4a 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -11,7 +11,6 @@ #include <linux/module.h> #include <linux/fs_struct.h> #include <linux/swap.h> -#include <linux/nsproxy.h> #include <linux/sunrpc/stats.h> #include <linux/sunrpc/svcsock.h> @@ -22,19 +21,19 @@ #include "nfsd.h" #include "cache.h" #include "vfs.h" +#include "netns.h" #define NFSDDBG_FACILITY NFSDDBG_SVC extern struct svc_program nfsd_program; static int nfsd(void *vrqstp); -struct timeval nfssvc_boot; /* - * nfsd_mutex protects nfsd_serv -- both the pointer itself and the members + * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members * of the svc_serv struct. In particular, ->sv_nrthreads but also to some * extent ->sv_temp_socks and ->sv_permsocks. It also protects nfsdstats.th_cnt * - * If (out side the lock) nfsd_serv is non-NULL, then it must point to a + * If (out side the lock) nn->nfsd_serv is non-NULL, then it must point to a * properly initialised 'struct svc_serv' with ->sv_nrthreads > 0. That number * of nfsd threads must exist and each must listed in ->sp_all_threads in each * entry of ->sv_pools[]. @@ -52,7 +51,6 @@ struct timeval nfssvc_boot; * nfsd_versions */ DEFINE_MUTEX(nfsd_mutex); -struct svc_serv *nfsd_serv; /* * nfsd_drc_lock protects nfsd_drc_max_pages and nfsd_drc_pages_used. @@ -173,28 +171,32 @@ int nfsd_minorversion(u32 minorversion, enum vers_op change) */ #define NFSD_MAXSERVS 8192 -int nfsd_nrthreads(void) +int nfsd_nrthreads(struct net *net) { int rv = 0; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + mutex_lock(&nfsd_mutex); - if (nfsd_serv) - rv = nfsd_serv->sv_nrthreads; + if (nn->nfsd_serv) + rv = nn->nfsd_serv->sv_nrthreads; mutex_unlock(&nfsd_mutex); return rv; } -static int nfsd_init_socks(void) +static int nfsd_init_socks(struct net *net) { int error; - if (!list_empty(&nfsd_serv->sv_permsocks)) + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + if (!list_empty(&nn->nfsd_serv->sv_permsocks)) return 0; - error = svc_create_xprt(nfsd_serv, "udp", &init_net, PF_INET, NFS_PORT, + error = svc_create_xprt(nn->nfsd_serv, "udp", net, PF_INET, NFS_PORT, SVC_SOCK_DEFAULTS); if (error < 0) return error; - error = svc_create_xprt(nfsd_serv, "tcp", &init_net, PF_INET, NFS_PORT, + error = svc_create_xprt(nn->nfsd_serv, "tcp", net, PF_INET, NFS_PORT, SVC_SOCK_DEFAULTS); if (error < 0) return error; @@ -202,14 +204,15 @@ static int nfsd_init_socks(void) return 0; } -static bool nfsd_up = false; +static int nfsd_users = 0; -static int nfsd_startup(int nrservs) +static int nfsd_startup_generic(int nrservs) { int ret; - if (nfsd_up) + if (nfsd_users++) return 0; + /* * Readahead param cache - will no-op if it already exists. * (Note therefore results will be suboptimal if number of @@ -218,43 +221,79 @@ static int nfsd_startup(int nrservs) ret = nfsd_racache_init(2*nrservs); if (ret) return ret; - ret = nfsd_init_socks(); + ret = nfs4_state_start(); if (ret) goto out_racache; - ret = lockd_up(&init_net); + return 0; + +out_racache: + nfsd_racache_shutdown(); + return ret; +} + +static void nfsd_shutdown_generic(void) +{ + if (--nfsd_users) + return; + + nfs4_state_shutdown(); + nfsd_racache_shutdown(); +} + +static int nfsd_startup_net(int nrservs, struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + int ret; + + if (nn->nfsd_net_up) + return 0; + + ret = nfsd_startup_generic(nrservs); if (ret) - goto out_racache; - ret = nfs4_state_start(); + return ret; + ret = nfsd_init_socks(net); + if (ret) + goto out_socks; + ret = lockd_up(net); + if (ret) + goto out_socks; + ret = nfs4_state_start_net(net); if (ret) goto out_lockd; - nfsd_up = true; + + nn->nfsd_net_up = true; return 0; + out_lockd: - lockd_down(&init_net); -out_racache: - nfsd_racache_shutdown(); + lockd_down(net); +out_socks: + nfsd_shutdown_generic(); return ret; } -static void nfsd_shutdown(void) +static void nfsd_shutdown_net(struct net *net) { + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + nfs4_state_shutdown_net(net); + lockd_down(net); + nn->nfsd_net_up = false; + nfsd_shutdown_generic(); +} + +static void nfsd_last_thread(struct svc_serv *serv, struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + /* * write_ports can create the server without actually starting * any threads--if we get shut down before any threads are * started, then nfsd_last_thread will be run before any of this * other initialization has been done. */ - if (!nfsd_up) + if (!nn->nfsd_net_up) return; - nfs4_state_shutdown(); - lockd_down(&init_net); - nfsd_racache_shutdown(); - nfsd_up = false; -} - -static void nfsd_last_thread(struct svc_serv *serv, struct net *net) -{ - nfsd_shutdown(); + nfsd_shutdown_net(net); svc_rpcb_cleanup(serv, net); @@ -327,69 +366,84 @@ static int nfsd_get_default_max_blksize(void) return ret; } -int nfsd_create_serv(void) +int nfsd_create_serv(struct net *net) { int error; - struct net *net = current->nsproxy->net_ns; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); WARN_ON(!mutex_is_locked(&nfsd_mutex)); - if (nfsd_serv) { - svc_get(nfsd_serv); + if (nn->nfsd_serv) { + svc_get(nn->nfsd_serv); return 0; } if (nfsd_max_blksize == 0) nfsd_max_blksize = nfsd_get_default_max_blksize(); nfsd_reset_versions(); - nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize, + nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize, nfsd_last_thread, nfsd, THIS_MODULE); - if (nfsd_serv == NULL) + if (nn->nfsd_serv == NULL) return -ENOMEM; - error = svc_bind(nfsd_serv, net); + error = svc_bind(nn->nfsd_serv, net); if (error < 0) { - svc_destroy(nfsd_serv); + svc_destroy(nn->nfsd_serv); return error; } set_max_drc(); - do_gettimeofday(&nfssvc_boot); /* record boot time */ + do_gettimeofday(&nn->nfssvc_boot); /* record boot time */ return 0; } -int nfsd_nrpools(void) +int nfsd_nrpools(struct net *net) { - if (nfsd_serv == NULL) + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + if (nn->nfsd_serv == NULL) return 0; else - return nfsd_serv->sv_nrpools; + return nn->nfsd_serv->sv_nrpools; } -int nfsd_get_nrthreads(int n, int *nthreads) +int nfsd_get_nrthreads(int n, int *nthreads, struct net *net) { int i = 0; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); - if (nfsd_serv != NULL) { - for (i = 0; i < nfsd_serv->sv_nrpools && i < n; i++) - nthreads[i] = nfsd_serv->sv_pools[i].sp_nrthreads; + if (nn->nfsd_serv != NULL) { + for (i = 0; i < nn->nfsd_serv->sv_nrpools && i < n; i++) + nthreads[i] = nn->nfsd_serv->sv_pools[i].sp_nrthreads; } return 0; } -int nfsd_set_nrthreads(int n, int *nthreads) +void nfsd_destroy(struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + int destroy = (nn->nfsd_serv->sv_nrthreads == 1); + + if (destroy) + svc_shutdown_net(nn->nfsd_serv, net); + svc_destroy(nn->nfsd_serv); + if (destroy) + nn->nfsd_serv = NULL; +} + +int nfsd_set_nrthreads(int n, int *nthreads, struct net *net) { int i = 0; int tot = 0; int err = 0; - struct net *net = &init_net; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); WARN_ON(!mutex_is_locked(&nfsd_mutex)); - if (nfsd_serv == NULL || n <= 0) + if (nn->nfsd_serv == NULL || n <= 0) return 0; - if (n > nfsd_serv->sv_nrpools) - n = nfsd_serv->sv_nrpools; + if (n > nn->nfsd_serv->sv_nrpools) + n = nn->nfsd_serv->sv_nrpools; /* enforce a global maximum number of threads */ tot = 0; @@ -419,9 +473,9 @@ int nfsd_set_nrthreads(int n, int *nthreads) nthreads[0] = 1; /* apply the new numbers */ - svc_get(nfsd_serv); + svc_get(nn->nfsd_serv); for (i = 0; i < n; i++) { - err = svc_set_num_threads(nfsd_serv, &nfsd_serv->sv_pools[i], + err = svc_set_num_threads(nn->nfsd_serv, &nn->nfsd_serv->sv_pools[i], nthreads[i]); if (err) break; @@ -436,11 +490,11 @@ int nfsd_set_nrthreads(int n, int *nthreads) * this is the first time nrservs is nonzero. */ int -nfsd_svc(int nrservs) +nfsd_svc(int nrservs, struct net *net) { int error; bool nfsd_up_before; - struct net *net = &init_net; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); mutex_lock(&nfsd_mutex); dprintk("nfsd: creating service\n"); @@ -449,29 +503,29 @@ nfsd_svc(int nrservs) if (nrservs > NFSD_MAXSERVS) nrservs = NFSD_MAXSERVS; error = 0; - if (nrservs == 0 && nfsd_serv == NULL) + if (nrservs == 0 && nn->nfsd_serv == NULL) goto out; - error = nfsd_create_serv(); + error = nfsd_create_serv(net); if (error) goto out; - nfsd_up_before = nfsd_up; + nfsd_up_before = nn->nfsd_net_up; - error = nfsd_startup(nrservs); + error = nfsd_startup_net(nrservs, net); if (error) goto out_destroy; - error = svc_set_num_threads(nfsd_serv, NULL, nrservs); + error = svc_set_num_threads(nn->nfsd_serv, NULL, nrservs); if (error) goto out_shutdown; - /* We are holding a reference to nfsd_serv which + /* We are holding a reference to nn->nfsd_serv which * we don't want to count in the return value, * so subtract 1 */ - error = nfsd_serv->sv_nrthreads - 1; + error = nn->nfsd_serv->sv_nrthreads - 1; out_shutdown: if (error < 0 && !nfsd_up_before) - nfsd_shutdown(); + nfsd_shutdown_net(net); out_destroy: nfsd_destroy(net); /* Release server */ out: @@ -487,6 +541,8 @@ static int nfsd(void *vrqstp) { struct svc_rqst *rqstp = (struct svc_rqst *) vrqstp; + struct svc_xprt *perm_sock = list_entry(rqstp->rq_server->sv_permsocks.next, typeof(struct svc_xprt), xpt_list); + struct net *net = perm_sock->xpt_net; int err; /* Lock module and set up kernel thread */ @@ -551,7 +607,7 @@ out: /* Release the thread */ svc_exit_thread(rqstp); - nfsd_destroy(&init_net); + nfsd_destroy(net); /* Release module */ mutex_unlock(&nfsd_mutex); @@ -640,21 +696,24 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp) } /* Store reply in cache. */ - nfsd_cache_update(rqstp, proc->pc_cachetype, statp + 1); + nfsd_cache_update(rqstp, rqstp->rq_cachetype, statp + 1); return 1; } int nfsd_pool_stats_open(struct inode *inode, struct file *file) { int ret; + struct net *net = &init_net; + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + mutex_lock(&nfsd_mutex); - if (nfsd_serv == NULL) { + if (nn->nfsd_serv == NULL) { mutex_unlock(&nfsd_mutex); return -ENODEV; } /* bump up the psudo refcount while traversing */ - svc_get(nfsd_serv); - ret = svc_pool_stats_open(nfsd_serv, file); + svc_get(nn->nfsd_serv); + ret = svc_pool_stats_open(nn->nfsd_serv, file); mutex_unlock(&nfsd_mutex); return ret; } diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c index 65ec595e222..979b4210697 100644 --- a/fs/nfsd/nfsxdr.c +++ b/fs/nfsd/nfsxdr.c @@ -246,7 +246,7 @@ nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readargs *args) { unsigned int len; - int v,pn; + int v; if (!(p = decode_fh(p, &args->fh))) return 0; @@ -262,8 +262,9 @@ nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, */ v=0; while (len > 0) { - pn = rqstp->rq_resused++; - rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]); + struct page *p = *(rqstp->rq_next_page++); + + rqstp->rq_vec[v].iov_base = page_address(p); rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE; len -= rqstp->rq_vec[v].iov_len; v++; @@ -355,7 +356,7 @@ nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readli { if (!(p = decode_fh(p, &args->fh))) return 0; - args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]); + args->buffer = page_address(*(rqstp->rq_next_page++)); return xdr_argsize_check(rqstp, p); } @@ -396,7 +397,7 @@ nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, if (args->count > PAGE_SIZE) args->count = PAGE_SIZE; - args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]); + args->buffer = page_address(*(rqstp->rq_next_page++)); return xdr_argsize_check(rqstp, p); } diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index e036894bce5..d1c229feed5 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -150,6 +150,12 @@ struct nfsd4_channel_attrs { u32 rdma_attrs; }; +struct nfsd4_cb_sec { + u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */ + u32 uid; + u32 gid; +}; + struct nfsd4_create_session { clientid_t clientid; struct nfs4_sessionid sessionid; @@ -158,8 +164,12 @@ struct nfsd4_create_session { struct nfsd4_channel_attrs fore_channel; struct nfsd4_channel_attrs back_channel; u32 callback_prog; - u32 uid; - u32 gid; + struct nfsd4_cb_sec cb_sec; +}; + +struct nfsd4_backchannel_ctl { + u32 bc_cb_program; + struct nfsd4_cb_sec bc_cb_sec; }; struct nfsd4_bind_conn_to_session { @@ -192,6 +202,7 @@ struct nfsd4_session { struct nfs4_sessionid se_sessionid; struct nfsd4_channel_attrs se_fchannel; struct nfsd4_channel_attrs se_bchannel; + struct nfsd4_cb_sec se_cb_sec; struct list_head se_conns; u32 se_cb_prog; u32 se_cb_seq_nr; @@ -221,13 +232,12 @@ struct nfsd4_sessionid { */ struct nfs4_client { struct list_head cl_idhash; /* hash by cl_clientid.id */ - struct list_head cl_strhash; /* hash by cl_name */ + struct rb_node cl_namenode; /* link into by-name trees */ struct list_head cl_openowners; struct idr cl_stateids; /* stateid lookup */ struct list_head cl_delegations; struct list_head cl_lru; /* tail queue */ struct xdr_netobj cl_name; /* id generated by client */ - char cl_recdir[HEXDIR_LEN]; /* recovery dir */ nfs4_verifier cl_verifier; /* generated by client */ time_t cl_time; /* time of last lease renewal */ struct sockaddr_storage cl_addr; /* client ipaddress */ @@ -242,9 +252,11 @@ struct nfs4_client { #define NFSD4_CLIENT_CB_KILL (1) #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */ #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */ +#define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */ #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \ 1 << NFSD4_CLIENT_CB_KILL) unsigned long cl_flags; + struct rpc_cred *cl_cb_cred; struct rpc_clnt *cl_cb_client; u32 cl_cb_ident; #define NFSD4_CB_UP 0 @@ -271,6 +283,7 @@ struct nfs4_client { unsigned long cl_cb_slot_busy; struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */ /* wait here for slots */ + struct net *net; }; static inline void @@ -292,6 +305,7 @@ is_client_expired(struct nfs4_client *clp) */ struct nfs4_client_reclaim { struct list_head cr_strhash; /* hash by cr_name */ + struct nfs4_client *cr_clp; /* pointer to associated clp */ char cr_recdir[HEXDIR_LEN]; /* recover dir */ }; @@ -452,25 +466,26 @@ extern __be32 nfs4_preprocess_stateid_op(struct net *net, stateid_t *stateid, int flags, struct file **filp); extern void nfs4_lock_state(void); extern void nfs4_unlock_state(void); -extern int nfs4_in_grace(void); -extern void nfs4_release_reclaim(void); -extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct nfs4_client *crp); -extern __be32 nfs4_check_open_reclaim(clientid_t *clid, bool sessions); +void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); +extern void nfs4_release_reclaim(struct nfsd_net *); +extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir, + struct nfsd_net *nn); +extern __be32 nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn); extern void nfs4_free_openowner(struct nfs4_openowner *); extern void nfs4_free_lockowner(struct nfs4_lockowner *); extern int set_callback_cred(void); +extern void nfsd4_init_callback(struct nfsd4_callback *); extern void nfsd4_probe_callback(struct nfs4_client *clp); extern void nfsd4_probe_callback_sync(struct nfs4_client *clp); extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *); -extern void nfsd4_do_callback_rpc(struct work_struct *); extern void nfsd4_cb_recall(struct nfs4_delegation *dp); extern int nfsd4_create_callback_queue(void); extern void nfsd4_destroy_callback_queue(void); extern void nfsd4_shutdown_callback(struct nfs4_client *); extern void nfs4_put_delegation(struct nfs4_delegation *dp); -extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname); -extern int nfs4_client_to_reclaim(const char *name); -extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id); +extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name, + struct nfsd_net *nn); +extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn); extern void release_session_client(struct nfsd4_session *); extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *); @@ -480,5 +495,28 @@ extern void nfsd4_client_tracking_exit(struct net *net); extern void nfsd4_client_record_create(struct nfs4_client *clp); extern void nfsd4_client_record_remove(struct nfs4_client *clp); extern int nfsd4_client_record_check(struct nfs4_client *clp); -extern void nfsd4_record_grace_done(struct net *net, time_t boot_time); +extern void nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time); + +/* nfs fault injection functions */ +#ifdef CONFIG_NFSD_FAULT_INJECTION +int nfsd_fault_inject_init(void); +void nfsd_fault_inject_cleanup(void); +u64 nfsd_for_n_state(u64, u64 (*)(struct nfs4_client *, u64)); +struct nfs4_client *nfsd_find_client(struct sockaddr_storage *, size_t); + +u64 nfsd_forget_client(struct nfs4_client *, u64); +u64 nfsd_forget_client_locks(struct nfs4_client*, u64); +u64 nfsd_forget_client_openowners(struct nfs4_client *, u64); +u64 nfsd_forget_client_delegations(struct nfs4_client *, u64); +u64 nfsd_recall_client_delegations(struct nfs4_client *, u64); + +u64 nfsd_print_client(struct nfs4_client *, u64); +u64 nfsd_print_client_locks(struct nfs4_client *, u64); +u64 nfsd_print_client_openowners(struct nfs4_client *, u64); +u64 nfsd_print_client_delegations(struct nfs4_client *, u64); +#else /* CONFIG_NFSD_FAULT_INJECTION */ +static inline int nfsd_fault_inject_init(void) { return 0; } +static inline void nfsd_fault_inject_cleanup(void) {} +#endif /* CONFIG_NFSD_FAULT_INJECTION */ + #endif /* NFSD4_STATE_H */ diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index c120b48ec30..d586117fa94 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -886,7 +886,7 @@ nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf, struct splice_desc *sd) { struct svc_rqst *rqstp = sd->u.data; - struct page **pp = rqstp->rq_respages + rqstp->rq_resused; + struct page **pp = rqstp->rq_next_page; struct page *page = buf->page; size_t size; @@ -894,17 +894,15 @@ nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf, if (rqstp->rq_res.page_len == 0) { get_page(page); - put_page(*pp); - *pp = page; - rqstp->rq_resused++; + put_page(*rqstp->rq_next_page); + *(rqstp->rq_next_page++) = page; rqstp->rq_res.page_base = buf->offset; rqstp->rq_res.page_len = size; } else if (page != pp[-1]) { get_page(page); - if (*pp) - put_page(*pp); - *pp = page; - rqstp->rq_resused++; + if (*rqstp->rq_next_page) + put_page(*rqstp->rq_next_page); + *(rqstp->rq_next_page++) = page; rqstp->rq_res.page_len += size; } else rqstp->rq_res.page_len += size; @@ -936,7 +934,7 @@ nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, .u.data = rqstp, }; - rqstp->rq_resused = 1; + rqstp->rq_next_page = rqstp->rq_respages + 1; host_err = splice_direct_to_actor(file, &sd, nfsd_direct_splice_actor); } else { oldfs = get_fs(); @@ -1020,28 +1018,10 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, inode = dentry->d_inode; exp = fhp->fh_export; - /* - * Request sync writes if - * - the sync export option has been set, or - * - the client requested O_SYNC behavior (NFSv3 feature). - * - The file system doesn't support fsync(). - * When NFSv2 gathered writes have been configured for this volume, - * flushing the data to disk is handled separately below. - */ use_wgather = (rqstp->rq_vers == 2) && EX_WGATHER(exp); - if (!file->f_op->fsync) {/* COMMIT3 cannot work */ - stable = 2; - *stablep = 2; /* FILE_SYNC */ - } - if (!EX_ISSYNC(exp)) stable = 0; - if (stable && !use_wgather) { - spin_lock(&file->f_lock); - file->f_flags |= O_SYNC; - spin_unlock(&file->f_lock); - } /* Write the data. */ oldfs = get_fs(); set_fs(KERNEL_DS); @@ -1057,8 +1037,12 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, if (inode->i_mode & (S_ISUID | S_ISGID)) kill_suid(dentry); - if (stable && use_wgather) - host_err = wait_for_concurrent_writes(file); + if (stable) { + if (use_wgather) + host_err = wait_for_concurrent_writes(file); + else + host_err = vfs_fsync_range(file, offset, offset+*cnt, 0); + } out_nfserr: dprintk("nfsd: write complete host_err=%d\n", host_err); @@ -1485,13 +1469,19 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, case NFS3_CREATE_EXCLUSIVE: if ( dchild->d_inode->i_mtime.tv_sec == v_mtime && dchild->d_inode->i_atime.tv_sec == v_atime - && dchild->d_inode->i_size == 0 ) + && dchild->d_inode->i_size == 0 ) { + if (created) + *created = 1; break; + } case NFS4_CREATE_EXCLUSIVE4_1: if ( dchild->d_inode->i_mtime.tv_sec == v_mtime && dchild->d_inode->i_atime.tv_sec == v_atime - && dchild->d_inode->i_size == 0 ) + && dchild->d_inode->i_size == 0 ) { + if (created) + *created = 1; goto set_attr; + } /* fallthru */ case NFS3_CREATE_GUARDED: err = nfserr_exist; diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index acd127d4ee8..0889bfb43dc 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -385,7 +385,8 @@ struct nfsd4_write { u64 wr_offset; /* request */ u32 wr_stable_how; /* request */ u32 wr_buflen; /* request */ - int wr_vlen; + struct kvec wr_head; + struct page ** wr_pagelist; /* request */ u32 wr_bytes_written; /* response */ u32 wr_how_written; /* response */ @@ -462,6 +463,7 @@ struct nfsd4_op { /* NFSv4.1 */ struct nfsd4_exchange_id exchange_id; + struct nfsd4_backchannel_ctl backchannel_ctl; struct nfsd4_bind_conn_to_session bind_conn_to_session; struct nfsd4_create_session create_session; struct nfsd4_destroy_session destroy_session; @@ -526,6 +528,14 @@ static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp) || nfsd4_is_solo_sequence(resp); } +static inline bool nfsd4_last_compound_op(struct svc_rqst *rqstp) +{ + struct nfsd4_compoundres *resp = rqstp->rq_resp; + struct nfsd4_compoundargs *argp = rqstp->rq_argp; + + return argp->opcnt == resp->opcnt; +} + #define NFS4_SVC_XDRSIZE sizeof(struct nfsd4_compoundargs) static inline void @@ -566,6 +576,7 @@ extern __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, struct nfsd4_sequence *seq); extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *, struct nfsd4_exchange_id *); +extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_backchannel_ctl *); extern __be32 nfsd4_bind_conn_to_session(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_bind_conn_to_session *); extern __be32 nfsd4_create_session(struct svc_rqst *, struct nfsd4_compound_state *, @@ -579,7 +590,7 @@ extern __be32 nfsd4_destroy_session(struct svc_rqst *, extern __be32 nfsd4_destroy_clientid(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_destroy_clientid *); __be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_reclaim_complete *); extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *, - struct nfsd4_open *open); + struct nfsd4_open *open, struct nfsd_net *nn); extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open); extern void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status); diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c index 16f35f7423c..61946883025 100644 --- a/fs/nilfs2/file.c +++ b/fs/nilfs2/file.c @@ -167,7 +167,6 @@ const struct file_operations nilfs_file_operations = { }; const struct inode_operations nilfs_file_inode_operations = { - .truncate = nilfs_truncate, .setattr = nilfs_setattr, .permission = nilfs_permission, .fiemap = nilfs_fiemap, diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 4d31d2cca7f..6b49f14eac8 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -213,6 +213,16 @@ static int nilfs_set_page_dirty(struct page *page) return ret; } +void nilfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + nilfs_truncate(inode); + } +} + static int nilfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -227,10 +237,7 @@ static int nilfs_write_begin(struct file *file, struct address_space *mapping, err = block_write_begin(mapping, pos, len, flags, pagep, nilfs_get_block); if (unlikely(err)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - + nilfs_write_failed(mapping, pos + len); nilfs_transaction_abort(inode->i_sb); } return err; @@ -259,6 +266,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) { struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; struct inode *inode = file->f_mapping->host; ssize_t size; @@ -278,7 +286,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t end = offset + iov_length(iov, nr_segs); if (end > isize) - vmtruncate(inode, isize); + nilfs_write_failed(mapping, end); } return size; @@ -786,10 +794,8 @@ int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size != i_size_read(inode)) { inode_dio_wait(inode); - - err = vmtruncate(inode, iattr->ia_size); - if (unlikely(err)) - goto out_err; + truncate_setsize(inode, iattr->ia_size); + nilfs_truncate(inode); } setattr_copy(inode, iattr); diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h index 74cece80e9a..9bc72dec3fa 100644 --- a/fs/nilfs2/nilfs.h +++ b/fs/nilfs2/nilfs.h @@ -277,6 +277,7 @@ extern void nilfs_update_inode(struct inode *, struct buffer_head *); extern void nilfs_truncate(struct inode *); extern void nilfs_evict_inode(struct inode *); extern int nilfs_setattr(struct dentry *, struct iattr *); +extern void nilfs_write_failed(struct address_space *mapping, loff_t to); int nilfs_permission(struct inode *inode, int mask); int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh); extern int nilfs_inode_dirty(struct inode *); diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 3e7b2a0dc0c..07f76db04ec 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -431,7 +431,7 @@ void nilfs_mapping_init(struct address_space *mapping, struct inode *inode, mapping->host = inode; mapping->flags = 0; mapping_set_gfp_mask(mapping, GFP_NOFS); - mapping->assoc_mapping = NULL; + mapping->private_data = NULL; mapping->backing_dev_info = bdi; mapping->a_ops = &empty_aops; } diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c index f1626f5011c..ff00a0b7acb 100644 --- a/fs/nilfs2/recovery.c +++ b/fs/nilfs2/recovery.c @@ -527,7 +527,8 @@ static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs, if (unlikely(err)) { loff_t isize = inode->i_size; if (pos + blocksize > isize) - vmtruncate(inode, isize); + nilfs_write_failed(inode->i_mapping, + pos + blocksize); goto failed_inode; } diff --git a/fs/notify/Makefile b/fs/notify/Makefile index ae5f33a6d86..96d3420d024 100644 --- a/fs/notify/Makefile +++ b/fs/notify/Makefile @@ -1,5 +1,5 @@ obj-$(CONFIG_FSNOTIFY) += fsnotify.o notification.o group.o inode_mark.o \ - mark.o vfsmount_mark.o + mark.o vfsmount_mark.o fdinfo.o obj-y += dnotify/ obj-y += inotify/ diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c index 3344bdd5506..08b886f119c 100644 --- a/fs/notify/dnotify/dnotify.c +++ b/fs/notify/dnotify/dnotify.c @@ -201,7 +201,7 @@ void dnotify_flush(struct file *filp, fl_owner_t id) /* nothing else could have found us thanks to the dnotify_mark_mutex */ if (dn_mark->dn == NULL) - fsnotify_destroy_mark(fsn_mark); + fsnotify_destroy_mark(fsn_mark, dnotify_group); mutex_unlock(&dnotify_mark_mutex); @@ -385,7 +385,7 @@ out: spin_unlock(&fsn_mark->lock); if (destroy) - fsnotify_destroy_mark(fsn_mark); + fsnotify_destroy_mark(fsn_mark, dnotify_group); mutex_unlock(&dnotify_mark_mutex); fsnotify_put_mark(fsn_mark); diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index f35794b97e8..0c2f9122b26 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -18,9 +18,16 @@ static bool should_merge(struct fsnotify_event *old, struct fsnotify_event *new) old->tgid == new->tgid) { switch (old->data_type) { case (FSNOTIFY_EVENT_PATH): +#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS + /* dont merge two permission events */ + if ((old->mask & FAN_ALL_PERM_EVENTS) && + (new->mask & FAN_ALL_PERM_EVENTS)) + return false; +#endif if ((old->path.mnt == new->path.mnt) && (old->path.dentry == new->path.dentry)) return true; + break; case (FSNOTIFY_EVENT_NONE): return true; default: diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 721d692fa8d..9ff4a5ee6e2 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -17,6 +17,7 @@ #include <asm/ioctls.h> #include "../../mount.h" +#include "../fdinfo.h" #define FANOTIFY_DEFAULT_MAX_EVENTS 16384 #define FANOTIFY_DEFAULT_MAX_MARKS 8192 @@ -258,7 +259,8 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, if (ret) goto out_close_fd; - fd_install(fd, f); + if (fd != FAN_NOFD) + fd_install(fd, f); return fanotify_event_metadata.event_len; out_close_fd: @@ -395,8 +397,12 @@ static int fanotify_release(struct inode *ignored, struct file *file) wake_up(&group->fanotify_data.access_waitq); #endif + + if (file->f_flags & FASYNC) + fsnotify_fasync(-1, file, 0); + /* matches the fanotify_init->fsnotify_alloc_group */ - fsnotify_put_group(group); + fsnotify_destroy_group(group); return 0; } @@ -427,6 +433,7 @@ static long fanotify_ioctl(struct file *file, unsigned int cmd, unsigned long ar } static const struct file_operations fanotify_fops = { + .show_fdinfo = fanotify_show_fdinfo, .poll = fanotify_poll, .read = fanotify_read, .write = fanotify_write, @@ -490,7 +497,8 @@ out: static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark, __u32 mask, - unsigned int flags) + unsigned int flags, + int *destroy) { __u32 oldmask; @@ -504,8 +512,7 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark, } spin_unlock(&fsn_mark->lock); - if (!(oldmask & ~mask)) - fsnotify_destroy_mark(fsn_mark); + *destroy = !(oldmask & ~mask); return mask & oldmask; } @@ -516,12 +523,17 @@ static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group, { struct fsnotify_mark *fsn_mark = NULL; __u32 removed; + int destroy_mark; fsn_mark = fsnotify_find_vfsmount_mark(group, mnt); if (!fsn_mark) return -ENOENT; - removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags); + removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags, + &destroy_mark); + if (destroy_mark) + fsnotify_destroy_mark(fsn_mark, group); + fsnotify_put_mark(fsn_mark); if (removed & real_mount(mnt)->mnt_fsnotify_mask) fsnotify_recalc_vfsmount_mask(mnt); @@ -535,12 +547,16 @@ static int fanotify_remove_inode_mark(struct fsnotify_group *group, { struct fsnotify_mark *fsn_mark = NULL; __u32 removed; + int destroy_mark; fsn_mark = fsnotify_find_inode_mark(group, inode); if (!fsn_mark) return -ENOENT; - removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags); + removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags, + &destroy_mark); + if (destroy_mark) + fsnotify_destroy_mark(fsn_mark, group); /* matches the fsnotify_find_inode_mark() */ fsnotify_put_mark(fsn_mark); if (removed & inode->i_fsnotify_mask) @@ -707,13 +723,13 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) break; default: fd = -EINVAL; - goto out_put_group; + goto out_destroy_group; } if (flags & FAN_UNLIMITED_QUEUE) { fd = -EPERM; if (!capable(CAP_SYS_ADMIN)) - goto out_put_group; + goto out_destroy_group; group->max_events = UINT_MAX; } else { group->max_events = FANOTIFY_DEFAULT_MAX_EVENTS; @@ -722,7 +738,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) if (flags & FAN_UNLIMITED_MARKS) { fd = -EPERM; if (!capable(CAP_SYS_ADMIN)) - goto out_put_group; + goto out_destroy_group; group->fanotify_data.max_marks = UINT_MAX; } else { group->fanotify_data.max_marks = FANOTIFY_DEFAULT_MAX_MARKS; @@ -730,12 +746,12 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) fd = anon_inode_getfd("[fanotify]", &fanotify_fops, group, f_flags); if (fd < 0) - goto out_put_group; + goto out_destroy_group; return fd; -out_put_group: - fsnotify_put_group(group); +out_destroy_group: + fsnotify_destroy_group(group); return fd; } diff --git a/fs/notify/fdinfo.c b/fs/notify/fdinfo.c new file mode 100644 index 00000000000..238a5930cb3 --- /dev/null +++ b/fs/notify/fdinfo.c @@ -0,0 +1,179 @@ +#include <linux/file.h> +#include <linux/fs.h> +#include <linux/fsnotify_backend.h> +#include <linux/idr.h> +#include <linux/init.h> +#include <linux/inotify.h> +#include <linux/fanotify.h> +#include <linux/kernel.h> +#include <linux/namei.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/seq_file.h> +#include <linux/proc_fs.h> +#include <linux/exportfs.h> + +#include "inotify/inotify.h" +#include "../fs/mount.h" + +#if defined(CONFIG_PROC_FS) + +#if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY) + +static int show_fdinfo(struct seq_file *m, struct file *f, + int (*show)(struct seq_file *m, struct fsnotify_mark *mark)) +{ + struct fsnotify_group *group = f->private_data; + struct fsnotify_mark *mark; + int ret = 0; + + mutex_lock(&group->mark_mutex); + list_for_each_entry(mark, &group->marks_list, g_list) { + ret = show(m, mark); + if (ret) + break; + } + mutex_unlock(&group->mark_mutex); + return ret; +} + +#if defined(CONFIG_EXPORTFS) +static int show_mark_fhandle(struct seq_file *m, struct inode *inode) +{ + struct { + struct file_handle handle; + u8 pad[64]; + } f; + int size, ret, i; + + f.handle.handle_bytes = sizeof(f.pad); + size = f.handle.handle_bytes >> 2; + + ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, 0); + if ((ret == 255) || (ret == -ENOSPC)) { + WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret); + return 0; + } + + f.handle.handle_type = ret; + f.handle.handle_bytes = size * sizeof(u32); + + ret = seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:", + f.handle.handle_bytes, f.handle.handle_type); + + for (i = 0; i < f.handle.handle_bytes; i++) + ret |= seq_printf(m, "%02x", (int)f.handle.f_handle[i]); + + return ret; +} +#else +static int show_mark_fhandle(struct seq_file *m, struct inode *inode) +{ + return 0; +} +#endif + +#ifdef CONFIG_INOTIFY_USER + +static int inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) +{ + struct inotify_inode_mark *inode_mark; + struct inode *inode; + int ret = 0; + + if (!(mark->flags & (FSNOTIFY_MARK_FLAG_ALIVE | FSNOTIFY_MARK_FLAG_INODE))) + return 0; + + inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark); + inode = igrab(mark->i.inode); + if (inode) { + ret = seq_printf(m, "inotify wd:%x ino:%lx sdev:%x " + "mask:%x ignored_mask:%x ", + inode_mark->wd, inode->i_ino, + inode->i_sb->s_dev, + mark->mask, mark->ignored_mask); + ret |= show_mark_fhandle(m, inode); + ret |= seq_putc(m, '\n'); + iput(inode); + } + + return ret; +} + +int inotify_show_fdinfo(struct seq_file *m, struct file *f) +{ + return show_fdinfo(m, f, inotify_fdinfo); +} + +#endif /* CONFIG_INOTIFY_USER */ + +#ifdef CONFIG_FANOTIFY + +static int fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) +{ + unsigned int mflags = 0; + struct inode *inode; + int ret = 0; + + if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE)) + return 0; + + if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY) + mflags |= FAN_MARK_IGNORED_SURV_MODIFY; + + if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) { + inode = igrab(mark->i.inode); + if (!inode) + goto out; + ret = seq_printf(m, "fanotify ino:%lx sdev:%x " + "mflags:%x mask:%x ignored_mask:%x ", + inode->i_ino, inode->i_sb->s_dev, + mflags, mark->mask, mark->ignored_mask); + ret |= show_mark_fhandle(m, inode); + ret |= seq_putc(m, '\n'); + iput(inode); + } else if (mark->flags & FSNOTIFY_MARK_FLAG_VFSMOUNT) { + struct mount *mnt = real_mount(mark->m.mnt); + + ret = seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x " + "ignored_mask:%x\n", mnt->mnt_id, mflags, + mark->mask, mark->ignored_mask); + } +out: + return ret; +} + +int fanotify_show_fdinfo(struct seq_file *m, struct file *f) +{ + struct fsnotify_group *group = f->private_data; + unsigned int flags = 0; + + switch (group->priority) { + case FS_PRIO_0: + flags |= FAN_CLASS_NOTIF; + break; + case FS_PRIO_1: + flags |= FAN_CLASS_CONTENT; + break; + case FS_PRIO_2: + flags |= FAN_CLASS_PRE_CONTENT; + break; + } + + if (group->max_events == UINT_MAX) + flags |= FAN_UNLIMITED_QUEUE; + + if (group->fanotify_data.max_marks == UINT_MAX) + flags |= FAN_UNLIMITED_MARKS; + + seq_printf(m, "fanotify flags:%x event-flags:%x\n", + flags, group->fanotify_data.f_flags); + + return show_fdinfo(m, f, fanotify_fdinfo); +} + +#endif /* CONFIG_FANOTIFY */ + +#endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */ + +#endif /* CONFIG_PROC_FS */ diff --git a/fs/notify/fdinfo.h b/fs/notify/fdinfo.h new file mode 100644 index 00000000000..556afda990e --- /dev/null +++ b/fs/notify/fdinfo.h @@ -0,0 +1,27 @@ +#ifndef __FSNOTIFY_FDINFO_H__ +#define __FSNOTIFY_FDINFO_H__ + +#include <linux/errno.h> +#include <linux/proc_fs.h> + +struct seq_file; +struct file; + +#ifdef CONFIG_PROC_FS + +#ifdef CONFIG_INOTIFY_USER +extern int inotify_show_fdinfo(struct seq_file *m, struct file *f); +#endif + +#ifdef CONFIG_FANOTIFY +extern int fanotify_show_fdinfo(struct seq_file *m, struct file *f); +#endif + +#else /* CONFIG_PROC_FS */ + +#define inotify_show_fdinfo NULL +#define fanotify_show_fdinfo NULL + +#endif /* CONFIG_PROC_FS */ + +#endif /* __FSNOTIFY_FDINFO_H__ */ diff --git a/fs/notify/group.c b/fs/notify/group.c index 63fc294a469..bd2625bd88b 100644 --- a/fs/notify/group.c +++ b/fs/notify/group.c @@ -33,9 +33,6 @@ */ void fsnotify_final_destroy_group(struct fsnotify_group *group) { - /* clear the notification queue of all events */ - fsnotify_flush_notify(group); - if (group->ops->free_group_priv) group->ops->free_group_priv(group); @@ -43,23 +40,30 @@ void fsnotify_final_destroy_group(struct fsnotify_group *group) } /* - * Trying to get rid of a group. We need to first get rid of any outstanding - * allocations and then free the group. Remember that fsnotify_clear_marks_by_group - * could miss marks that are being freed by inode and those marks could still - * hold a reference to this group (via group->num_marks) If we get into that - * situtation, the fsnotify_final_destroy_group will get called when that final - * mark is freed. + * Trying to get rid of a group. Remove all marks, flush all events and release + * the group reference. + * Note that another thread calling fsnotify_clear_marks_by_group() may still + * hold a ref to the group. */ -static void fsnotify_destroy_group(struct fsnotify_group *group) +void fsnotify_destroy_group(struct fsnotify_group *group) { /* clear all inode marks for this group */ fsnotify_clear_marks_by_group(group); synchronize_srcu(&fsnotify_mark_srcu); - /* past the point of no return, matches the initial value of 1 */ - if (atomic_dec_and_test(&group->num_marks)) - fsnotify_final_destroy_group(group); + /* clear the notification queue of all events */ + fsnotify_flush_notify(group); + + fsnotify_put_group(group); +} + +/* + * Get reference to a group. + */ +void fsnotify_get_group(struct fsnotify_group *group) +{ + atomic_inc(&group->refcnt); } /* @@ -68,7 +72,7 @@ static void fsnotify_destroy_group(struct fsnotify_group *group) void fsnotify_put_group(struct fsnotify_group *group) { if (atomic_dec_and_test(&group->refcnt)) - fsnotify_destroy_group(group); + fsnotify_final_destroy_group(group); } /* @@ -84,21 +88,24 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops) /* set to 0 when there a no external references to this group */ atomic_set(&group->refcnt, 1); - /* - * hits 0 when there are no external references AND no marks for - * this group - */ - atomic_set(&group->num_marks, 1); + atomic_set(&group->num_marks, 0); mutex_init(&group->notification_mutex); INIT_LIST_HEAD(&group->notification_list); init_waitqueue_head(&group->notification_waitq); group->max_events = UINT_MAX; - spin_lock_init(&group->mark_lock); + mutex_init(&group->mark_mutex); INIT_LIST_HEAD(&group->marks_list); group->ops = ops; return group; } + +int fsnotify_fasync(int fd, struct file *file, int on) +{ + struct fsnotify_group *group = file->private_data; + + return fasync_helper(fd, file, on, &group->fsn_fa) >= 0 ? 0 : -EIO; +} diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c index b13c00ac48e..f31e90fc050 100644 --- a/fs/notify/inode_mark.c +++ b/fs/notify/inode_mark.c @@ -63,8 +63,8 @@ void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark) { struct inode *inode = mark->i.inode; + BUG_ON(!mutex_is_locked(&mark->group->mark_mutex)); assert_spin_locked(&mark->lock); - assert_spin_locked(&mark->group->mark_lock); spin_lock(&inode->i_lock); @@ -99,8 +99,16 @@ void fsnotify_clear_marks_by_inode(struct inode *inode) spin_unlock(&inode->i_lock); list_for_each_entry_safe(mark, lmark, &free_list, i.free_i_list) { - fsnotify_destroy_mark(mark); + struct fsnotify_group *group; + + spin_lock(&mark->lock); + fsnotify_get_group(mark->group); + group = mark->group; + spin_unlock(&mark->lock); + + fsnotify_destroy_mark(mark, group); fsnotify_put_mark(mark); + fsnotify_put_group(group); } } @@ -116,8 +124,9 @@ void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group) * given a group and inode, find the mark associated with that combination. * if found take a reference to that mark and return it, else return NULL */ -struct fsnotify_mark *fsnotify_find_inode_mark_locked(struct fsnotify_group *group, - struct inode *inode) +static struct fsnotify_mark *fsnotify_find_inode_mark_locked( + struct fsnotify_group *group, + struct inode *inode) { struct fsnotify_mark *mark; struct hlist_node *pos; @@ -191,8 +200,8 @@ int fsnotify_add_inode_mark(struct fsnotify_mark *mark, mark->flags |= FSNOTIFY_MARK_FLAG_INODE; + BUG_ON(!mutex_is_locked(&group->mark_mutex)); assert_spin_locked(&mark->lock); - assert_spin_locked(&group->mark_lock); spin_lock(&inode->i_lock); diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c index e3cbd746f64..871569c7d60 100644 --- a/fs/notify/inotify/inotify_fsnotify.c +++ b/fs/notify/inotify/inotify_fsnotify.c @@ -118,6 +118,7 @@ static int inotify_handle_event(struct fsnotify_group *group, fsn_event_priv = &event_priv->fsnotify_event_priv_data; + fsnotify_get_group(group); fsn_event_priv->group = group; event_priv->wd = wd; @@ -131,7 +132,7 @@ static int inotify_handle_event(struct fsnotify_group *group, } if (inode_mark->mask & IN_ONESHOT) - fsnotify_destroy_mark(inode_mark); + fsnotify_destroy_mark(inode_mark, group); return ret; } @@ -210,6 +211,7 @@ void inotify_free_event_priv(struct fsnotify_event_private_data *fsn_event_priv) event_priv = container_of(fsn_event_priv, struct inotify_event_private_data, fsnotify_event_priv_data); + fsnotify_put_group(fsn_event_priv->group); kmem_cache_free(event_priv_cachep, event_priv); } diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c index c311dda054a..228a2c2ad8d 100644 --- a/fs/notify/inotify/inotify_user.c +++ b/fs/notify/inotify/inotify_user.c @@ -40,6 +40,7 @@ #include <linux/wait.h> #include "inotify.h" +#include "../fdinfo.h" #include <asm/ioctls.h> @@ -264,7 +265,7 @@ static ssize_t inotify_read(struct file *file, char __user *buf, ret = -EAGAIN; if (file->f_flags & O_NONBLOCK) break; - ret = -EINTR; + ret = -ERESTARTSYS; if (signal_pending(current)) break; @@ -280,23 +281,17 @@ static ssize_t inotify_read(struct file *file, char __user *buf, return ret; } -static int inotify_fasync(int fd, struct file *file, int on) -{ - struct fsnotify_group *group = file->private_data; - - return fasync_helper(fd, file, on, &group->inotify_data.fa) >= 0 ? 0 : -EIO; -} - static int inotify_release(struct inode *ignored, struct file *file) { struct fsnotify_group *group = file->private_data; pr_debug("%s: group=%p\n", __func__, group); - fsnotify_clear_marks_by_group(group); + if (file->f_flags & FASYNC) + fsnotify_fasync(-1, file, 0); /* free this group, matching get was inotify_init->fsnotify_obtain_group */ - fsnotify_put_group(group); + fsnotify_destroy_group(group); return 0; } @@ -335,9 +330,10 @@ static long inotify_ioctl(struct file *file, unsigned int cmd, } static const struct file_operations inotify_fops = { + .show_fdinfo = inotify_show_fdinfo, .poll = inotify_poll, .read = inotify_read, - .fasync = inotify_fasync, + .fasync = fsnotify_fasync, .release = inotify_release, .unlocked_ioctl = inotify_ioctl, .compat_ioctl = inotify_ioctl, @@ -519,13 +515,13 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark, struct fsnotify_event_private_data *fsn_event_priv; int ret; + i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark); + ignored_event = fsnotify_create_event(NULL, FS_IN_IGNORED, NULL, FSNOTIFY_EVENT_NONE, NULL, 0, GFP_NOFS); if (!ignored_event) - return; - - i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark); + goto skip_send_ignore; event_priv = kmem_cache_alloc(event_priv_cachep, GFP_NOFS); if (unlikely(!event_priv)) @@ -533,6 +529,7 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark, fsn_event_priv = &event_priv->fsnotify_event_priv_data; + fsnotify_get_group(group); fsn_event_priv->group = group; event_priv->wd = i_mark->wd; @@ -546,9 +543,9 @@ void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark, } skip_send_ignore: - /* matches the reference taken when the event was created */ - fsnotify_put_event(ignored_event); + if (ignored_event) + fsnotify_put_event(ignored_event); /* remove this mark from the idr */ inotify_remove_from_idr(group, i_mark); @@ -707,12 +704,11 @@ static struct fsnotify_group *inotify_new_group(unsigned int max_events) spin_lock_init(&group->inotify_data.idr_lock); idr_init(&group->inotify_data.idr); group->inotify_data.last_wd = 0; - group->inotify_data.fa = NULL; group->inotify_data.user = get_current_user(); if (atomic_inc_return(&group->inotify_data.user->inotify_devs) > inotify_max_user_instances) { - fsnotify_put_group(group); + fsnotify_destroy_group(group); return ERR_PTR(-EMFILE); } @@ -741,7 +737,7 @@ SYSCALL_DEFINE1(inotify_init1, int, flags) ret = anon_inode_getfd("inotify", &inotify_fops, group, O_RDONLY | flags); if (ret < 0) - fsnotify_put_group(group); + fsnotify_destroy_group(group); return ret; } @@ -817,7 +813,7 @@ SYSCALL_DEFINE2(inotify_rm_watch, int, fd, __s32, wd) ret = 0; - fsnotify_destroy_mark(&i_mark->fsn_mark); + fsnotify_destroy_mark(&i_mark->fsn_mark, group); /* match ref taken by inotify_idr_find */ fsnotify_put_mark(&i_mark->fsn_mark); diff --git a/fs/notify/mark.c b/fs/notify/mark.c index f104d565b68..fc6b49bf736 100644 --- a/fs/notify/mark.c +++ b/fs/notify/mark.c @@ -109,8 +109,11 @@ void fsnotify_get_mark(struct fsnotify_mark *mark) void fsnotify_put_mark(struct fsnotify_mark *mark) { - if (atomic_dec_and_test(&mark->refcnt)) + if (atomic_dec_and_test(&mark->refcnt)) { + if (mark->group) + fsnotify_put_group(mark->group); mark->free_mark(mark); + } } /* @@ -118,14 +121,14 @@ void fsnotify_put_mark(struct fsnotify_mark *mark) * The caller had better be holding a reference to this mark so we don't actually * do the final put under the mark->lock */ -void fsnotify_destroy_mark(struct fsnotify_mark *mark) +void fsnotify_destroy_mark_locked(struct fsnotify_mark *mark, + struct fsnotify_group *group) { - struct fsnotify_group *group; struct inode *inode = NULL; - spin_lock(&mark->lock); + BUG_ON(!mutex_is_locked(&group->mark_mutex)); - group = mark->group; + spin_lock(&mark->lock); /* something else already called this function on this mark */ if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE)) { @@ -135,8 +138,6 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark) mark->flags &= ~FSNOTIFY_MARK_FLAG_ALIVE; - spin_lock(&group->mark_lock); - if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) { inode = mark->i.inode; fsnotify_destroy_inode_mark(mark); @@ -147,13 +148,22 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark) list_del_init(&mark->g_list); - spin_unlock(&group->mark_lock); spin_unlock(&mark->lock); + if (inode && (mark->flags & FSNOTIFY_MARK_FLAG_OBJECT_PINNED)) + iput(inode); + /* release lock temporarily */ + mutex_unlock(&group->mark_mutex); + spin_lock(&destroy_lock); list_add(&mark->destroy_list, &destroy_list); spin_unlock(&destroy_lock); wake_up(&destroy_waitq); + /* + * We don't necessarily have a ref on mark from caller so the above destroy + * may have actually freed it, unless this group provides a 'freeing_mark' + * function which must be holding a reference. + */ /* * Some groups like to know that marks are being freed. This is a @@ -175,21 +185,17 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark) * is just a lazy update (and could be a perf win...) */ - if (inode && (mark->flags & FSNOTIFY_MARK_FLAG_OBJECT_PINNED)) - iput(inode); + atomic_dec(&group->num_marks); - /* - * We don't necessarily have a ref on mark from caller so the above iput - * may have already destroyed it. Don't touch from now on. - */ + mutex_lock_nested(&group->mark_mutex, SINGLE_DEPTH_NESTING); +} - /* - * it's possible that this group tried to destroy itself, but this - * this mark was simultaneously being freed by inode. If that's the - * case, we finish freeing the group here. - */ - if (unlikely(atomic_dec_and_test(&group->num_marks))) - fsnotify_final_destroy_group(group); +void fsnotify_destroy_mark(struct fsnotify_mark *mark, + struct fsnotify_group *group) +{ + mutex_lock_nested(&group->mark_mutex, SINGLE_DEPTH_NESTING); + fsnotify_destroy_mark_locked(mark, group); + mutex_unlock(&group->mark_mutex); } void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask) @@ -214,26 +220,26 @@ void fsnotify_set_mark_ignored_mask_locked(struct fsnotify_mark *mark, __u32 mas * These marks may be used for the fsnotify backend to determine which * event types should be delivered to which group. */ -int fsnotify_add_mark(struct fsnotify_mark *mark, - struct fsnotify_group *group, struct inode *inode, - struct vfsmount *mnt, int allow_dups) +int fsnotify_add_mark_locked(struct fsnotify_mark *mark, + struct fsnotify_group *group, struct inode *inode, + struct vfsmount *mnt, int allow_dups) { int ret = 0; BUG_ON(inode && mnt); BUG_ON(!inode && !mnt); + BUG_ON(!mutex_is_locked(&group->mark_mutex)); /* * LOCKING ORDER!!!! + * group->mark_mutex * mark->lock - * group->mark_lock * inode->i_lock */ spin_lock(&mark->lock); - spin_lock(&group->mark_lock); - mark->flags |= FSNOTIFY_MARK_FLAG_ALIVE; + fsnotify_get_group(group); mark->group = group; list_add(&mark->g_list, &group->marks_list); atomic_inc(&group->num_marks); @@ -251,11 +257,8 @@ int fsnotify_add_mark(struct fsnotify_mark *mark, BUG(); } - spin_unlock(&group->mark_lock); - /* this will pin the object if appropriate */ fsnotify_set_mark_mask_locked(mark, mark->mask); - spin_unlock(&mark->lock); if (inode) @@ -265,10 +268,10 @@ int fsnotify_add_mark(struct fsnotify_mark *mark, err: mark->flags &= ~FSNOTIFY_MARK_FLAG_ALIVE; list_del_init(&mark->g_list); + fsnotify_put_group(group); mark->group = NULL; atomic_dec(&group->num_marks); - spin_unlock(&group->mark_lock); spin_unlock(&mark->lock); spin_lock(&destroy_lock); @@ -279,6 +282,16 @@ err: return ret; } +int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group, + struct inode *inode, struct vfsmount *mnt, int allow_dups) +{ + int ret; + mutex_lock(&group->mark_mutex); + ret = fsnotify_add_mark_locked(mark, group, inode, mnt, allow_dups); + mutex_unlock(&group->mark_mutex); + return ret; +} + /* * clear any marks in a group in which mark->flags & flags is true */ @@ -286,22 +299,16 @@ void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group, unsigned int flags) { struct fsnotify_mark *lmark, *mark; - LIST_HEAD(free_list); - spin_lock(&group->mark_lock); + mutex_lock_nested(&group->mark_mutex, SINGLE_DEPTH_NESTING); list_for_each_entry_safe(mark, lmark, &group->marks_list, g_list) { if (mark->flags & flags) { - list_add(&mark->free_g_list, &free_list); - list_del_init(&mark->g_list); fsnotify_get_mark(mark); + fsnotify_destroy_mark_locked(mark, group); + fsnotify_put_mark(mark); } } - spin_unlock(&group->mark_lock); - - list_for_each_entry_safe(mark, lmark, &free_list, free_g_list) { - fsnotify_destroy_mark(mark); - fsnotify_put_mark(mark); - } + mutex_unlock(&group->mark_mutex); } /* @@ -317,6 +324,8 @@ void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *ol assert_spin_locked(&old->lock); new->i.inode = old->i.inode; new->m.mnt = old->m.mnt; + if (old->group) + fsnotify_get_group(old->group); new->group = old->group; new->mask = old->mask; new->free_mark = old->free_mark; diff --git a/fs/notify/notification.c b/fs/notify/notification.c index 48cb994e492..7b51b05f160 100644 --- a/fs/notify/notification.c +++ b/fs/notify/notification.c @@ -225,6 +225,7 @@ alloc_holder: mutex_unlock(&group->notification_mutex); wake_up(&group->notification_waitq); + kill_fasync(&group->fsn_fa, SIGIO, POLL_IN); return return_event; } diff --git a/fs/notify/vfsmount_mark.c b/fs/notify/vfsmount_mark.c index b7b4b0e8554..4df58b8ea64 100644 --- a/fs/notify/vfsmount_mark.c +++ b/fs/notify/vfsmount_mark.c @@ -46,8 +46,16 @@ void fsnotify_clear_marks_by_mount(struct vfsmount *mnt) spin_unlock(&mnt->mnt_root->d_lock); list_for_each_entry_safe(mark, lmark, &free_list, m.free_m_list) { - fsnotify_destroy_mark(mark); + struct fsnotify_group *group; + + spin_lock(&mark->lock); + fsnotify_get_group(mark->group); + group = mark->group; + spin_unlock(&mark->lock); + + fsnotify_destroy_mark(mark, group); fsnotify_put_mark(mark); + fsnotify_put_group(group); } } @@ -88,8 +96,8 @@ void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark) { struct vfsmount *mnt = mark->m.mnt; + BUG_ON(!mutex_is_locked(&mark->group->mark_mutex)); assert_spin_locked(&mark->lock); - assert_spin_locked(&mark->group->mark_lock); spin_lock(&mnt->mnt_root->d_lock); @@ -151,8 +159,8 @@ int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark, mark->flags |= FSNOTIFY_MARK_FLAG_VFSMOUNT; + BUG_ON(!mutex_is_locked(&group->mark_mutex)); assert_spin_locked(&mark->lock); - assert_spin_locked(&group->mark_lock); spin_lock(&mnt->mnt_root->d_lock); diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index 1ecf46448f8..5b2d4f0853a 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -1762,6 +1762,16 @@ err_out: return err; } +static void ntfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + ntfs_truncate_vfs(inode); + } +} + /** * ntfs_file_buffered_write - * @@ -2022,8 +2032,9 @@ static ssize_t ntfs_file_buffered_write(struct kiocb *iocb, * allocated space, which is not a disaster. */ i_size = i_size_read(vi); - if (pos + bytes > i_size) - vmtruncate(vi, i_size); + if (pos + bytes > i_size) { + ntfs_write_failed(mapping, pos + bytes); + } break; } } @@ -2227,7 +2238,6 @@ const struct file_operations ntfs_file_ops = { const struct inode_operations ntfs_file_inode_ops = { #ifdef NTFS_RW - .truncate = ntfs_truncate_vfs, .setattr = ntfs_setattr, #endif /* NTFS_RW */ }; diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c index 1d27331e6fc..d3e118cc6ff 100644 --- a/fs/ntfs/inode.c +++ b/fs/ntfs/inode.c @@ -2866,9 +2866,11 @@ conv_err_out: * * See ntfs_truncate() description above for details. */ +#ifdef NTFS_RW void ntfs_truncate_vfs(struct inode *vi) { ntfs_truncate(vi); } +#endif /** * ntfs_setattr - called from notify_change() when an attribute is being changed @@ -2914,8 +2916,10 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr) NInoCompressed(ni) ? "compressed" : "encrypted"); err = -EOPNOTSUPP; - } else - err = vmtruncate(vi, attr->ia_size); + } else { + truncate_setsize(vi, attr->ia_size); + ntfs_truncate_vfs(vi); + } if (err || ia_valid == ATTR_SIZE) goto out; } else { diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h index db29695f845..76b6cfb579d 100644 --- a/fs/ntfs/inode.h +++ b/fs/ntfs/inode.h @@ -316,6 +316,10 @@ static inline void ntfs_commit_inode(struct inode *vi) return; } +#else + +static inline void ntfs_truncate_vfs(struct inode *vi) {} + #endif /* NTFS_RW */ #endif /* _LINUX_NTFS_INODE_H */ diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c index 70b5863a2d6..f487aa34344 100644 --- a/fs/ocfs2/extent_map.c +++ b/fs/ocfs2/extent_map.c @@ -832,7 +832,7 @@ out: return ret; } -int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin) +int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int whence) { struct inode *inode = file->f_mapping->host; int ret; @@ -843,7 +843,7 @@ int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin) struct buffer_head *di_bh = NULL; struct ocfs2_extent_rec rec; - BUG_ON(origin != SEEK_DATA && origin != SEEK_HOLE); + BUG_ON(whence != SEEK_DATA && whence != SEEK_HOLE); ret = ocfs2_inode_lock(inode, &di_bh, 0); if (ret) { @@ -859,7 +859,7 @@ int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin) } if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { - if (origin == SEEK_HOLE) + if (whence == SEEK_HOLE) *offset = inode->i_size; goto out_unlock; } @@ -888,8 +888,8 @@ int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin) is_data = (rec.e_flags & OCFS2_EXT_UNWRITTEN) ? 0 : 1; } - if ((!is_data && origin == SEEK_HOLE) || - (is_data && origin == SEEK_DATA)) { + if ((!is_data && whence == SEEK_HOLE) || + (is_data && whence == SEEK_DATA)) { if (extoff > *offset) *offset = extoff; goto out_unlock; @@ -899,7 +899,7 @@ int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin) cpos += clen; } - if (origin == SEEK_HOLE) { + if (whence == SEEK_HOLE) { extoff = cpos; extoff <<= cs_bits; extlen = clen; diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 5a4ee77cec5..37d313ede15 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1218,24 +1218,6 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) } } - /* - * This will intentionally not wind up calling truncate_setsize(), - * since all the work for a size change has been done above. - * Otherwise, we could get into problems with truncate as - * ip_alloc_sem is used there to protect against i_size - * changes. - * - * XXX: this means the conditional below can probably be removed. - */ - if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) { - status = vmtruncate(inode, attr->ia_size); - if (status) { - mlog_errno(status); - goto bail_commit; - } - } - setattr_copy(inode, attr); mark_inode_dirty(inode); @@ -2513,18 +2495,15 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, ret = sd.num_spliced; if (ret > 0) { - unsigned long nr_pages; int err; - nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; - err = generic_write_sync(out, *ppos, ret); if (err) ret = err; else *ppos += ret; - balance_dirty_pages_ratelimited_nr(mapping, nr_pages); + balance_dirty_pages_ratelimited(mapping); } return ret; @@ -2640,14 +2619,14 @@ bail: } /* Refer generic_file_llseek_unlocked() */ -static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int origin) +static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; int ret = 0; mutex_lock(&inode->i_mutex); - switch (origin) { + switch (whence) { case SEEK_SET: break; case SEEK_END: @@ -2662,7 +2641,7 @@ static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int origin) break; case SEEK_DATA: case SEEK_HOLE: - ret = ocfs2_seek_data_hole_offset(file, &offset, origin); + ret = ocfs2_seek_data_hole_offset(file, &offset, whence); if (ret) goto out; break; diff --git a/fs/omfs/file.c b/fs/omfs/file.c index 77e3cb2962b..e0d9b3e722b 100644 --- a/fs/omfs/file.c +++ b/fs/omfs/file.c @@ -306,6 +306,16 @@ omfs_writepages(struct address_space *mapping, struct writeback_control *wbc) return mpage_writepages(mapping, wbc, omfs_get_block); } +static void omfs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + omfs_truncate(inode); + } +} + static int omfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -314,11 +324,8 @@ static int omfs_write_begin(struct file *file, struct address_space *mapping, ret = block_write_begin(mapping, pos, len, flags, pagep, omfs_get_block); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + omfs_write_failed(mapping, pos + len); return ret; } @@ -350,9 +357,11 @@ static int omfs_setattr(struct dentry *dentry, struct iattr *attr) if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, attr->ia_size); + error = inode_newsize_ok(inode, attr->ia_size); if (error) return error; + truncate_setsize(inode, attr->ia_size); + omfs_truncate(inode); } setattr_copy(inode, attr); @@ -362,7 +371,6 @@ static int omfs_setattr(struct dentry *dentry, struct iattr *attr) const struct inode_operations omfs_file_inops = { .setattr = omfs_setattr, - .truncate = omfs_truncate }; const struct address_space_operations omfs_aops = { diff --git a/fs/open.c b/fs/open.c index 59071f55bf7..9b33c0cbfac 100644 --- a/fs/open.c +++ b/fs/open.c @@ -61,33 +61,22 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs, return ret; } -static long do_sys_truncate(const char __user *pathname, loff_t length) +long vfs_truncate(struct path *path, loff_t length) { - struct path path; struct inode *inode; - int error; - - error = -EINVAL; - if (length < 0) /* sorry, but loff_t says... */ - goto out; + long error; - error = user_path(pathname, &path); - if (error) - goto out; - inode = path.dentry->d_inode; + inode = path->dentry->d_inode; /* For directories it's -EISDIR, for other non-regulars - -EINVAL */ - error = -EISDIR; if (S_ISDIR(inode->i_mode)) - goto dput_and_out; - - error = -EINVAL; + return -EISDIR; if (!S_ISREG(inode->i_mode)) - goto dput_and_out; + return -EINVAL; - error = mnt_want_write(path.mnt); + error = mnt_want_write(path->mnt); if (error) - goto dput_and_out; + goto out; error = inode_permission(inode, MAY_WRITE); if (error) @@ -111,19 +100,40 @@ static long do_sys_truncate(const char __user *pathname, loff_t length) error = locks_verify_truncate(inode, NULL, length); if (!error) - error = security_path_truncate(&path); + error = security_path_truncate(path); if (!error) - error = do_truncate(path.dentry, length, 0, NULL); + error = do_truncate(path->dentry, length, 0, NULL); put_write_and_out: put_write_access(inode); mnt_drop_write_and_out: - mnt_drop_write(path.mnt); -dput_and_out: - path_put(&path); + mnt_drop_write(path->mnt); out: return error; } +EXPORT_SYMBOL_GPL(vfs_truncate); + +static long do_sys_truncate(const char __user *pathname, loff_t length) +{ + unsigned int lookup_flags = LOOKUP_FOLLOW; + struct path path; + int error; + + if (length < 0) /* sorry, but loff_t says... */ + return -EINVAL; + +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); + if (!error) { + error = vfs_truncate(&path, length); + path_put(&path); + } + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } + return error; +} SYSCALL_DEFINE2(truncate, const char __user *, path, long, length) { @@ -306,6 +316,7 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode) struct path path; struct inode *inode; int res; + unsigned int lookup_flags = LOOKUP_FOLLOW; if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */ return -EINVAL; @@ -328,8 +339,8 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode) } old_cred = override_creds(override_cred); - - res = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path); +retry: + res = user_path_at(dfd, filename, lookup_flags, &path); if (res) goto out; @@ -364,6 +375,10 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode) out_path_release: path_put(&path); + if (retry_estale(res, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } out: revert_creds(old_cred); put_cred(override_cred); @@ -379,8 +394,9 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename) { struct path path; int error; - - error = user_path_dir(filename, &path); + unsigned int lookup_flags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY; +retry: + error = user_path_at(AT_FDCWD, filename, lookup_flags, &path); if (error) goto out; @@ -392,6 +408,10 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename) dput_and_out: path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } out: return error; } @@ -425,8 +445,9 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename) { struct path path; int error; - - error = user_path_dir(filename, &path); + unsigned int lookup_flags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY; +retry: + error = user_path_at(AT_FDCWD, filename, lookup_flags, &path); if (error) goto out; @@ -435,7 +456,7 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename) goto dput_and_out; error = -EPERM; - if (!capable(CAP_SYS_CHROOT)) + if (!nsown_capable(CAP_SYS_CHROOT)) goto dput_and_out; error = security_path_chroot(&path); if (error) @@ -445,6 +466,10 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename) error = 0; dput_and_out: path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } out: return error; } @@ -489,11 +514,16 @@ SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode { struct path path; int error; - - error = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path); + unsigned int lookup_flags = LOOKUP_FOLLOW; +retry: + error = user_path_at(dfd, filename, lookup_flags, &path); if (!error) { error = chmod_common(&path, mode); path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } } return error; } @@ -552,6 +582,7 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user, lookup_flags = (flag & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW; if (flag & AT_EMPTY_PATH) lookup_flags |= LOOKUP_EMPTY; +retry: error = user_path_at(dfd, filename, lookup_flags, &path); if (error) goto out; @@ -562,6 +593,10 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user, mnt_drop_write(path.mnt); out_release: path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } out: return error; } diff --git a/fs/pnode.h b/fs/pnode.h index 65c60979d54..19b853a3445 100644 --- a/fs/pnode.h +++ b/fs/pnode.h @@ -22,6 +22,7 @@ #define CL_COPY_ALL 0x04 #define CL_MAKE_SHARED 0x08 #define CL_PRIVATE 0x10 +#define CL_SHARED_TO_SLAVE 0x20 static inline void set_mnt_shared(struct mount *mnt) { diff --git a/fs/proc/Makefile b/fs/proc/Makefile index 99349efbbc2..981b0560193 100644 --- a/fs/proc/Makefile +++ b/fs/proc/Makefile @@ -21,6 +21,7 @@ proc-y += uptime.o proc-y += version.o proc-y += softirqs.o proc-y += namespaces.o +proc-y += self.o proc-$(CONFIG_PROC_SYSCTL) += proc_sysctl.o proc-$(CONFIG_NET) += proc_net.o proc-$(CONFIG_PROC_KCORE) += kcore.o diff --git a/fs/proc/array.c b/fs/proc/array.c index c1c207c36ca..6a91e6ffbcb 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -162,7 +162,7 @@ static inline const char *get_task_state(struct task_struct *tsk) static inline void task_state(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *p) { - struct user_namespace *user_ns = current_user_ns(); + struct user_namespace *user_ns = seq_user_ns(m); struct group_info *group_info; int g; struct fdtable *fdt = NULL; @@ -212,7 +212,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns, group_info = cred->group_info; task_unlock(p); - for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++) + for (g = 0; g < group_info->ngroups; g++) seq_printf(m, "%d ", from_kgid_munged(user_ns, GROUP_AT(group_info, g))); put_cred(cred); @@ -220,7 +220,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns, seq_putc(m, '\n'); } -static void render_sigset_t(struct seq_file *m, const char *header, +void render_sigset_t(struct seq_file *m, const char *header, sigset_t *set) { int i; @@ -308,6 +308,10 @@ static void render_cap_t(struct seq_file *m, const char *header, seq_putc(m, '\n'); } +/* Remove non-existent capabilities */ +#define NORM_CAPS(v) (v.cap[CAP_TO_INDEX(CAP_LAST_CAP)] &= \ + CAP_TO_MASK(CAP_LAST_CAP + 1) - 1) + static inline void task_cap(struct seq_file *m, struct task_struct *p) { const struct cred *cred; @@ -321,12 +325,24 @@ static inline void task_cap(struct seq_file *m, struct task_struct *p) cap_bset = cred->cap_bset; rcu_read_unlock(); + NORM_CAPS(cap_inheritable); + NORM_CAPS(cap_permitted); + NORM_CAPS(cap_effective); + NORM_CAPS(cap_bset); + render_cap_t(m, "CapInh:\t", &cap_inheritable); render_cap_t(m, "CapPrm:\t", &cap_permitted); render_cap_t(m, "CapEff:\t", &cap_effective); render_cap_t(m, "CapBnd:\t", &cap_bset); } +static inline void task_seccomp(struct seq_file *m, struct task_struct *p) +{ +#ifdef CONFIG_SECCOMP + seq_printf(m, "Seccomp:\t%d\n", p->seccomp.mode); +#endif +} + static inline void task_context_switch_counts(struct seq_file *m, struct task_struct *p) { @@ -360,6 +376,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, } task_sig(m, task); task_cap(m, task); + task_seccomp(m, task); task_cpus_allowed(m, task); cpuset_task_status_allowed(m, task); task_context_switch_counts(m, task); @@ -438,7 +455,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, min_flt += sig->min_flt; maj_flt += sig->maj_flt; - thread_group_times(task, &utime, &stime); + thread_group_cputime_adjusted(task, &utime, &stime); gtime += sig->gtime; } @@ -454,7 +471,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns, if (!whole) { min_flt = task->min_flt; maj_flt = task->maj_flt; - task_times(task, &utime, &stime); + task_cputime_adjusted(task, &utime, &stime); gtime = task->gtime; } diff --git a/fs/proc/base.c b/fs/proc/base.c index 144a96732dd..9b43ff77a51 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -542,13 +542,6 @@ int proc_setattr(struct dentry *dentry, struct iattr *attr) if (error) return error; - if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, attr->ia_size); - if (error) - return error; - } - setattr_copy(inode, attr); mark_inode_dirty(inode); return 0; @@ -873,12 +866,119 @@ static const struct file_operations proc_environ_operations = { .release = mem_release, }; +static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count, + loff_t *ppos) +{ + struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode); + char buffer[PROC_NUMBUF]; + int oom_adj = OOM_ADJUST_MIN; + size_t len; + unsigned long flags; + + if (!task) + return -ESRCH; + if (lock_task_sighand(task, &flags)) { + if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MAX) + oom_adj = OOM_ADJUST_MAX; + else + oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) / + OOM_SCORE_ADJ_MAX; + unlock_task_sighand(task, &flags); + } + put_task_struct(task); + len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj); + return simple_read_from_buffer(buf, count, ppos, buffer, len); +} + +static ssize_t oom_adj_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct task_struct *task; + char buffer[PROC_NUMBUF]; + int oom_adj; + unsigned long flags; + int err; + + memset(buffer, 0, sizeof(buffer)); + if (count > sizeof(buffer) - 1) + count = sizeof(buffer) - 1; + if (copy_from_user(buffer, buf, count)) { + err = -EFAULT; + goto out; + } + + err = kstrtoint(strstrip(buffer), 0, &oom_adj); + if (err) + goto out; + if ((oom_adj < OOM_ADJUST_MIN || oom_adj > OOM_ADJUST_MAX) && + oom_adj != OOM_DISABLE) { + err = -EINVAL; + goto out; + } + + task = get_proc_task(file->f_path.dentry->d_inode); + if (!task) { + err = -ESRCH; + goto out; + } + + task_lock(task); + if (!task->mm) { + err = -EINVAL; + goto err_task_lock; + } + + if (!lock_task_sighand(task, &flags)) { + err = -ESRCH; + goto err_task_lock; + } + + /* + * Scale /proc/pid/oom_score_adj appropriately ensuring that a maximum + * value is always attainable. + */ + if (oom_adj == OOM_ADJUST_MAX) + oom_adj = OOM_SCORE_ADJ_MAX; + else + oom_adj = (oom_adj * OOM_SCORE_ADJ_MAX) / -OOM_DISABLE; + + if (oom_adj < task->signal->oom_score_adj && + !capable(CAP_SYS_RESOURCE)) { + err = -EACCES; + goto err_sighand; + } + + /* + * /proc/pid/oom_adj is provided for legacy purposes, ask users to use + * /proc/pid/oom_score_adj instead. + */ + printk_once(KERN_WARNING "%s (%d): /proc/%d/oom_adj is deprecated, please use /proc/%d/oom_score_adj instead.\n", + current->comm, task_pid_nr(current), task_pid_nr(task), + task_pid_nr(task)); + + task->signal->oom_score_adj = oom_adj; + trace_oom_score_adj_update(task); +err_sighand: + unlock_task_sighand(task, &flags); +err_task_lock: + task_unlock(task); + put_task_struct(task); +out: + return err < 0 ? err : count; +} + +static const struct file_operations proc_oom_adj_operations = { + .read = oom_adj_read, + .write = oom_adj_write, + .llseek = generic_file_llseek, +}; + static ssize_t oom_score_adj_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode); char buffer[PROC_NUMBUF]; - int oom_score_adj = OOM_SCORE_ADJ_MIN; + short oom_score_adj = OOM_SCORE_ADJ_MIN; unsigned long flags; size_t len; @@ -889,7 +989,7 @@ static ssize_t oom_score_adj_read(struct file *file, char __user *buf, unlock_task_sighand(task, &flags); } put_task_struct(task); - len = snprintf(buffer, sizeof(buffer), "%d\n", oom_score_adj); + len = snprintf(buffer, sizeof(buffer), "%hd\n", oom_score_adj); return simple_read_from_buffer(buf, count, ppos, buffer, len); } @@ -936,15 +1036,15 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf, goto err_task_lock; } - if (oom_score_adj < task->signal->oom_score_adj_min && + if ((short)oom_score_adj < task->signal->oom_score_adj_min && !capable(CAP_SYS_RESOURCE)) { err = -EACCES; goto err_sighand; } - task->signal->oom_score_adj = oom_score_adj; + task->signal->oom_score_adj = (short)oom_score_adj; if (has_capability_noaudit(current, CAP_SYS_RESOURCE)) - task->signal->oom_score_adj_min = oom_score_adj; + task->signal->oom_score_adj_min = (short)oom_score_adj; trace_oom_score_adj_update(task); err_sighand: @@ -1770,8 +1870,9 @@ static struct dentry *proc_map_files_lookup(struct inode *dir, if (!vma) goto out_no_vma; - result = proc_map_files_instantiate(dir, dentry, task, - (void *)(unsigned long)vma->vm_file->f_mode); + if (vma->vm_file) + result = proc_map_files_instantiate(dir, dentry, task, + (void *)(unsigned long)vma->vm_file->f_mode); out_no_vma: up_read(&mm->mmap_sem); @@ -2237,146 +2338,6 @@ static const struct file_operations proc_coredump_filter_operations = { }; #endif -/* - * /proc/self: - */ -static int proc_self_readlink(struct dentry *dentry, char __user *buffer, - int buflen) -{ - struct pid_namespace *ns = dentry->d_sb->s_fs_info; - pid_t tgid = task_tgid_nr_ns(current, ns); - char tmp[PROC_NUMBUF]; - if (!tgid) - return -ENOENT; - sprintf(tmp, "%d", tgid); - return vfs_readlink(dentry,buffer,buflen,tmp); -} - -static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd) -{ - struct pid_namespace *ns = dentry->d_sb->s_fs_info; - pid_t tgid = task_tgid_nr_ns(current, ns); - char *name = ERR_PTR(-ENOENT); - if (tgid) { - /* 11 for max length of signed int in decimal + NULL term */ - name = kmalloc(12, GFP_KERNEL); - if (!name) - name = ERR_PTR(-ENOMEM); - else - sprintf(name, "%d", tgid); - } - nd_set_link(nd, name); - return NULL; -} - -static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd, - void *cookie) -{ - char *s = nd_get_link(nd); - if (!IS_ERR(s)) - kfree(s); -} - -static const struct inode_operations proc_self_inode_operations = { - .readlink = proc_self_readlink, - .follow_link = proc_self_follow_link, - .put_link = proc_self_put_link, -}; - -/* - * proc base - * - * These are the directory entries in the root directory of /proc - * that properly belong to the /proc filesystem, as they describe - * describe something that is process related. - */ -static const struct pid_entry proc_base_stuff[] = { - NOD("self", S_IFLNK|S_IRWXUGO, - &proc_self_inode_operations, NULL, {}), -}; - -static struct dentry *proc_base_instantiate(struct inode *dir, - struct dentry *dentry, struct task_struct *task, const void *ptr) -{ - const struct pid_entry *p = ptr; - struct inode *inode; - struct proc_inode *ei; - struct dentry *error; - - /* Allocate the inode */ - error = ERR_PTR(-ENOMEM); - inode = new_inode(dir->i_sb); - if (!inode) - goto out; - - /* Initialize the inode */ - ei = PROC_I(inode); - inode->i_ino = get_next_ino(); - inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; - - /* - * grab the reference to the task. - */ - ei->pid = get_task_pid(task, PIDTYPE_PID); - if (!ei->pid) - goto out_iput; - - inode->i_mode = p->mode; - if (S_ISDIR(inode->i_mode)) - set_nlink(inode, 2); - if (S_ISLNK(inode->i_mode)) - inode->i_size = 64; - if (p->iop) - inode->i_op = p->iop; - if (p->fop) - inode->i_fop = p->fop; - ei->op = p->op; - d_add(dentry, inode); - error = NULL; -out: - return error; -out_iput: - iput(inode); - goto out; -} - -static struct dentry *proc_base_lookup(struct inode *dir, struct dentry *dentry) -{ - struct dentry *error; - struct task_struct *task = get_proc_task(dir); - const struct pid_entry *p, *last; - - error = ERR_PTR(-ENOENT); - - if (!task) - goto out_no_task; - - /* Lookup the directory entry */ - last = &proc_base_stuff[ARRAY_SIZE(proc_base_stuff) - 1]; - for (p = proc_base_stuff; p <= last; p++) { - if (p->len != dentry->d_name.len) - continue; - if (!memcmp(dentry->d_name.name, p->name, p->len)) - break; - } - if (p > last) - goto out; - - error = proc_base_instantiate(dir, dentry, task, p); - -out: - put_task_struct(task); -out_no_task: - return error; -} - -static int proc_base_fill_cache(struct file *filp, void *dirent, - filldir_t filldir, struct task_struct *task, const struct pid_entry *p) -{ - return proc_fill_cache(filp, dirent, filldir, p->name, p->len, - proc_base_instantiate, task, p); -} - #ifdef CONFIG_TASK_IO_ACCOUNTING static int do_io_accounting(struct task_struct *task, char *buffer, int whole) { @@ -2598,6 +2559,7 @@ static const struct pid_entry tgid_base_stuff[] = { REG("cgroup", S_IRUGO, proc_cgroup_operations), #endif INF("oom_score", S_IRUGO, proc_oom_score), + REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations), REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations), #ifdef CONFIG_AUDITSYSCALL REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations), @@ -2730,10 +2692,6 @@ void proc_flush_task(struct task_struct *task) proc_flush_task_mnt(upid->ns->proc_mnt, upid->nr, tgid->numbers[i].nr); } - - upid = &pid->numbers[pid->level]; - if (upid->nr == 1) - pid_ns_release_proc(upid->ns); } static struct dentry *proc_pid_instantiate(struct inode *dir, @@ -2767,15 +2725,11 @@ out: struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags) { - struct dentry *result; + struct dentry *result = NULL; struct task_struct *task; unsigned tgid; struct pid_namespace *ns; - result = proc_base_lookup(dir, dentry); - if (!IS_ERR(result) || PTR_ERR(result) != -ENOENT) - goto out; - tgid = name_to_int(dentry); if (tgid == ~0U) goto out; @@ -2838,7 +2792,7 @@ retry: return iter; } -#define TGID_OFFSET (FIRST_PROCESS_ENTRY + ARRAY_SIZE(proc_base_stuff)) +#define TGID_OFFSET (FIRST_PROCESS_ENTRY) static int proc_pid_fill_cache(struct file *filp, void *dirent, filldir_t filldir, struct tgid_iter iter) @@ -2858,25 +2812,12 @@ static int fake_filldir(void *buf, const char *name, int namelen, /* for the /proc/ directory itself, after non-process stuff has been done */ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir) { - unsigned int nr; - struct task_struct *reaper; struct tgid_iter iter; struct pid_namespace *ns; filldir_t __filldir; if (filp->f_pos >= PID_MAX_LIMIT + TGID_OFFSET) - goto out_no_task; - nr = filp->f_pos - FIRST_PROCESS_ENTRY; - - reaper = get_proc_task(filp->f_path.dentry->d_inode); - if (!reaper) - goto out_no_task; - - for (; nr < ARRAY_SIZE(proc_base_stuff); filp->f_pos++, nr++) { - const struct pid_entry *p = &proc_base_stuff[nr]; - if (proc_base_fill_cache(filp, dirent, filldir, reaper, p) < 0) - goto out; - } + goto out; ns = filp->f_dentry->d_sb->s_fs_info; iter.task = NULL; @@ -2897,8 +2838,6 @@ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir) } filp->f_pos = PID_MAX_LIMIT + TGID_OFFSET; out: - put_task_struct(reaper); -out_no_task: return 0; } @@ -2964,6 +2903,7 @@ static const struct pid_entry tid_base_stuff[] = { REG("cgroup", S_IRUGO, proc_cgroup_operations), #endif INF("oom_score", S_IRUGO, proc_oom_score), + REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations), REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations), #ifdef CONFIG_AUDITSYSCALL REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations), diff --git a/fs/proc/fd.c b/fs/proc/fd.c index f28a875f877..d7a4a28ef63 100644 --- a/fs/proc/fd.c +++ b/fs/proc/fd.c @@ -50,6 +50,8 @@ static int seq_show(struct seq_file *m, void *v) if (!ret) { seq_printf(m, "pos:\t%lli\nflags:\t0%o\n", (long long)file->f_pos, f_flags); + if (file->f_op->show_fdinfo) + ret = file->f_op->show_fdinfo(m, file); fput(file); } diff --git a/fs/proc/generic.c b/fs/proc/generic.c index 0d80cef4cfb..76ddae83daa 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -261,16 +261,9 @@ static int proc_notify_change(struct dentry *dentry, struct iattr *iattr) if (error) return error; - if ((iattr->ia_valid & ATTR_SIZE) && - iattr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, iattr->ia_size); - if (error) - return error; - } - setattr_copy(inode, iattr); mark_inode_dirty(inode); - + de->uid = inode->i_uid; de->gid = inode->i_gid; de->mode = inode->i_mode; @@ -350,37 +343,39 @@ static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */ * Return an inode number between PROC_DYNAMIC_FIRST and * 0xffffffff, or zero on failure. */ -static unsigned int get_inode_number(void) +int proc_alloc_inum(unsigned int *inum) { unsigned int i; int error; retry: - if (ida_pre_get(&proc_inum_ida, GFP_KERNEL) == 0) - return 0; + if (!ida_pre_get(&proc_inum_ida, GFP_KERNEL)) + return -ENOMEM; - spin_lock(&proc_inum_lock); + spin_lock_irq(&proc_inum_lock); error = ida_get_new(&proc_inum_ida, &i); - spin_unlock(&proc_inum_lock); + spin_unlock_irq(&proc_inum_lock); if (error == -EAGAIN) goto retry; else if (error) - return 0; + return error; if (i > UINT_MAX - PROC_DYNAMIC_FIRST) { - spin_lock(&proc_inum_lock); + spin_lock_irq(&proc_inum_lock); ida_remove(&proc_inum_ida, i); - spin_unlock(&proc_inum_lock); - return 0; + spin_unlock_irq(&proc_inum_lock); + return -ENOSPC; } - return PROC_DYNAMIC_FIRST + i; + *inum = PROC_DYNAMIC_FIRST + i; + return 0; } -static void release_inode_number(unsigned int inum) +void proc_free_inum(unsigned int inum) { - spin_lock(&proc_inum_lock); + unsigned long flags; + spin_lock_irqsave(&proc_inum_lock, flags); ida_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST); - spin_unlock(&proc_inum_lock); + spin_unlock_irqrestore(&proc_inum_lock, flags); } static void *proc_follow_link(struct dentry *dentry, struct nameidata *nd) @@ -554,13 +549,12 @@ static const struct inode_operations proc_dir_inode_operations = { static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp) { - unsigned int i; struct proc_dir_entry *tmp; + int ret; - i = get_inode_number(); - if (i == 0) - return -EAGAIN; - dp->low_ino = i; + ret = proc_alloc_inum(&dp->low_ino); + if (ret) + return ret; if (S_ISDIR(dp->mode)) { if (dp->proc_iops == NULL) { @@ -764,7 +758,7 @@ EXPORT_SYMBOL(proc_create_data); static void free_proc_entry(struct proc_dir_entry *de) { - release_inode_number(de->low_ino); + proc_free_inum(de->low_ino); if (S_ISLNK(de->mode)) kfree(de->data); diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 3b22bbdee9e..439ae688650 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -31,6 +31,7 @@ static void proc_evict_inode(struct inode *inode) struct proc_dir_entry *de; struct ctl_table_header *head; const struct proc_ns_operations *ns_ops; + void *ns; truncate_inode_pages(&inode->i_data, 0); clear_inode(inode); @@ -49,8 +50,9 @@ static void proc_evict_inode(struct inode *inode) } /* Release any associated namespace */ ns_ops = PROC_I(inode)->ns_ops; - if (ns_ops && ns_ops->put) - ns_ops->put(PROC_I(inode)->ns); + ns = PROC_I(inode)->ns; + if (ns_ops && ns) + ns_ops->put(ns); } static struct kmem_cache * proc_inode_cachep; diff --git a/fs/proc/internal.h b/fs/proc/internal.h index 43973b084ab..252544c0520 100644 --- a/fs/proc/internal.h +++ b/fs/proc/internal.h @@ -15,6 +15,7 @@ struct ctl_table_header; struct mempolicy; extern struct proc_dir_entry proc_root; +extern void proc_self_init(void); #ifdef CONFIG_PROC_SYSCTL extern int proc_sys_init(void); extern void sysctl_head_put(struct ctl_table_header *head); diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 86c67eee439..e96d4f18ca3 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -249,7 +249,7 @@ static int kcore_update_ram(void) /* Not inialized....update now */ /* find out "max pfn" */ end_pfn = 0; - for_each_node_state(nid, N_HIGH_MEMORY) { + for_each_node_state(nid, N_MEMORY) { unsigned long node_end; node_end = NODE_DATA(nid)->node_start_pfn + NODE_DATA(nid)->node_spanned_pages; diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index b178ed733c3..b7a47196c8c 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -11,6 +11,7 @@ #include <net/net_namespace.h> #include <linux/ipc_namespace.h> #include <linux/pid_namespace.h> +#include <linux/user_namespace.h> #include "internal.h" @@ -24,12 +25,168 @@ static const struct proc_ns_operations *ns_entries[] = { #ifdef CONFIG_IPC_NS &ipcns_operations, #endif +#ifdef CONFIG_PID_NS + &pidns_operations, +#endif +#ifdef CONFIG_USER_NS + &userns_operations, +#endif + &mntns_operations, }; static const struct file_operations ns_file_operations = { .llseek = no_llseek, }; +static const struct inode_operations ns_inode_operations = { + .setattr = proc_setattr, +}; + +static int ns_delete_dentry(const struct dentry *dentry) +{ + /* Don't cache namespace inodes when not in use */ + return 1; +} + +static char *ns_dname(struct dentry *dentry, char *buffer, int buflen) +{ + struct inode *inode = dentry->d_inode; + const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops; + + return dynamic_dname(dentry, buffer, buflen, "%s:[%lu]", + ns_ops->name, inode->i_ino); +} + +const struct dentry_operations ns_dentry_operations = +{ + .d_delete = ns_delete_dentry, + .d_dname = ns_dname, +}; + +static struct dentry *proc_ns_get_dentry(struct super_block *sb, + struct task_struct *task, const struct proc_ns_operations *ns_ops) +{ + struct dentry *dentry, *result; + struct inode *inode; + struct proc_inode *ei; + struct qstr qname = { .name = "", }; + void *ns; + + ns = ns_ops->get(task); + if (!ns) + return ERR_PTR(-ENOENT); + + dentry = d_alloc_pseudo(sb, &qname); + if (!dentry) { + ns_ops->put(ns); + return ERR_PTR(-ENOMEM); + } + + inode = iget_locked(sb, ns_ops->inum(ns)); + if (!inode) { + dput(dentry); + ns_ops->put(ns); + return ERR_PTR(-ENOMEM); + } + + ei = PROC_I(inode); + if (inode->i_state & I_NEW) { + inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; + inode->i_op = &ns_inode_operations; + inode->i_mode = S_IFREG | S_IRUGO; + inode->i_fop = &ns_file_operations; + ei->ns_ops = ns_ops; + ei->ns = ns; + unlock_new_inode(inode); + } else { + ns_ops->put(ns); + } + + d_set_d_op(dentry, &ns_dentry_operations); + result = d_instantiate_unique(dentry, inode); + if (result) { + dput(dentry); + dentry = result; + } + + return dentry; +} + +static void *proc_ns_follow_link(struct dentry *dentry, struct nameidata *nd) +{ + struct inode *inode = dentry->d_inode; + struct super_block *sb = inode->i_sb; + struct proc_inode *ei = PROC_I(inode); + struct task_struct *task; + struct dentry *ns_dentry; + void *error = ERR_PTR(-EACCES); + + task = get_proc_task(inode); + if (!task) + goto out; + + if (!ptrace_may_access(task, PTRACE_MODE_READ)) + goto out_put_task; + + ns_dentry = proc_ns_get_dentry(sb, task, ei->ns_ops); + if (IS_ERR(ns_dentry)) { + error = ERR_CAST(ns_dentry); + goto out_put_task; + } + + dput(nd->path.dentry); + nd->path.dentry = ns_dentry; + error = NULL; + +out_put_task: + put_task_struct(task); +out: + return error; +} + +static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int buflen) +{ + struct inode *inode = dentry->d_inode; + struct proc_inode *ei = PROC_I(inode); + const struct proc_ns_operations *ns_ops = ei->ns_ops; + struct task_struct *task; + void *ns; + char name[50]; + int len = -EACCES; + + task = get_proc_task(inode); + if (!task) + goto out; + + if (!ptrace_may_access(task, PTRACE_MODE_READ)) + goto out_put_task; + + len = -ENOENT; + ns = ns_ops->get(task); + if (!ns) + goto out_put_task; + + snprintf(name, sizeof(name), "%s:[%u]", ns_ops->name, ns_ops->inum(ns)); + len = strlen(name); + + if (len > buflen) + len = buflen; + if (copy_to_user(buffer, name, len)) + len = -EFAULT; + + ns_ops->put(ns); +out_put_task: + put_task_struct(task); +out: + return len; +} + +static const struct inode_operations proc_ns_link_inode_operations = { + .readlink = proc_ns_readlink, + .follow_link = proc_ns_follow_link, + .setattr = proc_setattr, +}; + static struct dentry *proc_ns_instantiate(struct inode *dir, struct dentry *dentry, struct task_struct *task, const void *ptr) { @@ -37,21 +194,15 @@ static struct dentry *proc_ns_instantiate(struct inode *dir, struct inode *inode; struct proc_inode *ei; struct dentry *error = ERR_PTR(-ENOENT); - void *ns; inode = proc_pid_make_inode(dir->i_sb, task); if (!inode) goto out; - ns = ns_ops->get(task); - if (!ns) - goto out_iput; - ei = PROC_I(inode); - inode->i_mode = S_IFREG|S_IRUSR; - inode->i_fop = &ns_file_operations; - ei->ns_ops = ns_ops; - ei->ns = ns; + inode->i_mode = S_IFLNK|S_IRWXUGO; + inode->i_op = &proc_ns_link_inode_operations; + ei->ns_ops = ns_ops; d_set_d_op(dentry, &pid_dentry_operations); d_add(dentry, inode); @@ -60,9 +211,6 @@ static struct dentry *proc_ns_instantiate(struct inode *dir, error = NULL; out: return error; -out_iput: - iput(inode); - goto out; } static int proc_ns_fill_cache(struct file *filp, void *dirent, @@ -89,10 +237,6 @@ static int proc_ns_dir_readdir(struct file *filp, void *dirent, if (!task) goto out_no_task; - ret = -EPERM; - if (!ptrace_may_access(task, PTRACE_MODE_READ)) - goto out; - ret = 0; i = filp->f_pos; switch (i) { @@ -152,10 +296,6 @@ static struct dentry *proc_ns_dir_lookup(struct inode *dir, if (!task) goto out_no_task; - error = ERR_PTR(-EPERM); - if (!ptrace_may_access(task, PTRACE_MODE_READ)) - goto out; - last = &ns_entries[ARRAY_SIZE(ns_entries)]; for (entry = ns_entries; entry < last; entry++) { if (strlen((*entry)->name) != len) @@ -163,7 +303,6 @@ static struct dentry *proc_ns_dir_lookup(struct inode *dir, if (!memcmp(dentry->d_name.name, (*entry)->name, len)) break; } - error = ERR_PTR(-ENOENT); if (entry == last) goto out; @@ -198,3 +337,7 @@ out_invalid: return ERR_PTR(-EINVAL); } +bool proc_ns_inode(struct inode *inode) +{ + return inode->i_fop == &ns_file_operations; +} diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c index df7dd08d439..de20ec480fa 100644 --- a/fs/proc/proc_devtree.c +++ b/fs/proc/proc_devtree.c @@ -195,11 +195,7 @@ void proc_device_tree_add_node(struct device_node *np, set_node_proc_entry(np, de); for (child = NULL; (child = of_get_next_child(np, child));) { /* Use everything after the last slash, or the full name */ - p = strrchr(child->full_name, '/'); - if (!p) - p = child->full_name; - else - ++p; + p = kbasename(child->full_name); if (duplicate_name(de, p)) p = fixup_name(np, de, p); diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index a781bdf0669..1827d88ad58 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -378,12 +378,13 @@ static int test_perm(int mode, int op) return -EACCES; } -static int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) +static int sysctl_perm(struct ctl_table_header *head, struct ctl_table *table, int op) { + struct ctl_table_root *root = head->root; int mode; if (root->permissions) - mode = root->permissions(root, current->nsproxy, table); + mode = root->permissions(head, table); else mode = table->mode; @@ -491,7 +492,7 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf, * and won't be until we finish. */ error = -EPERM; - if (sysctl_perm(head->root, table, write ? MAY_WRITE : MAY_READ)) + if (sysctl_perm(head, table, write ? MAY_WRITE : MAY_READ)) goto out; /* if that can happen at all, it should be -EINVAL, not -EISDIR */ @@ -717,7 +718,7 @@ static int proc_sys_permission(struct inode *inode, int mask) if (!table) /* global root - r-xr-xr-x */ error = mask & MAY_WRITE ? -EACCES : 0; else /* Use the permissions on the sysctl table entry */ - error = sysctl_perm(head->root, table, mask & ~MAY_NOT_BLOCK); + error = sysctl_perm(head, table, mask & ~MAY_NOT_BLOCK); sysctl_head_finish(head); return error; @@ -735,13 +736,6 @@ static int proc_sys_setattr(struct dentry *dentry, struct iattr *attr) if (error) return error; - if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, attr->ia_size); - if (error) - return error; - } - setattr_copy(inode, attr); mark_inode_dirty(inode); return 0; diff --git a/fs/proc/root.c b/fs/proc/root.c index 9889a92d2e0..c6e9fac26ba 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -100,14 +100,13 @@ static struct dentry *proc_mount(struct file_system_type *fs_type, int err; struct super_block *sb; struct pid_namespace *ns; - struct proc_inode *ei; char *options; if (flags & MS_KERNMOUNT) { ns = (struct pid_namespace *)data; options = NULL; } else { - ns = current->nsproxy->pid_ns; + ns = task_active_pid_ns(current); options = data; } @@ -130,13 +129,6 @@ static struct dentry *proc_mount(struct file_system_type *fs_type, sb->s_flags |= MS_ACTIVE; } - ei = PROC_I(sb->s_root->d_inode); - if (!ei->pid) { - rcu_read_lock(); - ei->pid = get_pid(find_pid_ns(1, ns)); - rcu_read_unlock(); - } - return dget(sb->s_root); } @@ -153,6 +145,7 @@ static struct file_system_type proc_fs_type = { .name = "proc", .mount = proc_mount, .kill_sb = proc_kill_sb, + .fs_flags = FS_USERNS_MOUNT, }; void __init proc_root_init(void) @@ -163,12 +156,8 @@ void __init proc_root_init(void) err = register_filesystem(&proc_fs_type); if (err) return; - err = pid_ns_prepare_proc(&init_pid_ns); - if (err) { - unregister_filesystem(&proc_fs_type); - return; - } + proc_self_init(); proc_symlink("mounts", NULL, "self/mounts"); proc_net_init(); diff --git a/fs/proc/self.c b/fs/proc/self.c new file mode 100644 index 00000000000..aa5cc3bff14 --- /dev/null +++ b/fs/proc/self.c @@ -0,0 +1,59 @@ +#include <linux/proc_fs.h> +#include <linux/sched.h> +#include <linux/namei.h> + +/* + * /proc/self: + */ +static int proc_self_readlink(struct dentry *dentry, char __user *buffer, + int buflen) +{ + struct pid_namespace *ns = dentry->d_sb->s_fs_info; + pid_t tgid = task_tgid_nr_ns(current, ns); + char tmp[PROC_NUMBUF]; + if (!tgid) + return -ENOENT; + sprintf(tmp, "%d", tgid); + return vfs_readlink(dentry,buffer,buflen,tmp); +} + +static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd) +{ + struct pid_namespace *ns = dentry->d_sb->s_fs_info; + pid_t tgid = task_tgid_nr_ns(current, ns); + char *name = ERR_PTR(-ENOENT); + if (tgid) { + /* 11 for max length of signed int in decimal + NULL term */ + name = kmalloc(12, GFP_KERNEL); + if (!name) + name = ERR_PTR(-ENOMEM); + else + sprintf(name, "%d", tgid); + } + nd_set_link(nd, name); + return NULL; +} + +static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd, + void *cookie) +{ + char *s = nd_get_link(nd); + if (!IS_ERR(s)) + kfree(s); +} + +static const struct inode_operations proc_self_inode_operations = { + .readlink = proc_self_readlink, + .follow_link = proc_self_follow_link, + .put_link = proc_self_put_link, +}; + +void __init proc_self_init(void) +{ + struct proc_dir_entry *proc_self_symlink; + mode_t mode; + + mode = S_IFLNK | S_IRWXUGO; + proc_self_symlink = proc_create("self", mode, NULL, NULL ); + proc_self_symlink->proc_iops = &proc_self_inode_operations; +} diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 90c63f9392a..ca5ce7f9f80 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -526,6 +526,57 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, return 0; } +static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma) +{ + /* + * Don't forget to update Documentation/ on changes. + */ + static const char mnemonics[BITS_PER_LONG][2] = { + /* + * In case if we meet a flag we don't know about. + */ + [0 ... (BITS_PER_LONG-1)] = "??", + + [ilog2(VM_READ)] = "rd", + [ilog2(VM_WRITE)] = "wr", + [ilog2(VM_EXEC)] = "ex", + [ilog2(VM_SHARED)] = "sh", + [ilog2(VM_MAYREAD)] = "mr", + [ilog2(VM_MAYWRITE)] = "mw", + [ilog2(VM_MAYEXEC)] = "me", + [ilog2(VM_MAYSHARE)] = "ms", + [ilog2(VM_GROWSDOWN)] = "gd", + [ilog2(VM_PFNMAP)] = "pf", + [ilog2(VM_DENYWRITE)] = "dw", + [ilog2(VM_LOCKED)] = "lo", + [ilog2(VM_IO)] = "io", + [ilog2(VM_SEQ_READ)] = "sr", + [ilog2(VM_RAND_READ)] = "rr", + [ilog2(VM_DONTCOPY)] = "dc", + [ilog2(VM_DONTEXPAND)] = "de", + [ilog2(VM_ACCOUNT)] = "ac", + [ilog2(VM_NORESERVE)] = "nr", + [ilog2(VM_HUGETLB)] = "ht", + [ilog2(VM_NONLINEAR)] = "nl", + [ilog2(VM_ARCH_1)] = "ar", + [ilog2(VM_DONTDUMP)] = "dd", + [ilog2(VM_MIXEDMAP)] = "mm", + [ilog2(VM_HUGEPAGE)] = "hg", + [ilog2(VM_NOHUGEPAGE)] = "nh", + [ilog2(VM_MERGEABLE)] = "mg", + }; + size_t i; + + seq_puts(m, "VmFlags: "); + for (i = 0; i < BITS_PER_LONG; i++) { + if (vma->vm_flags & (1UL << i)) { + seq_printf(m, "%c%c ", + mnemonics[i][0], mnemonics[i][1]); + } + } + seq_putc(m, '\n'); +} + static int show_smap(struct seq_file *m, void *v, int is_pid) { struct proc_maps_private *priv = m->private; @@ -581,6 +632,8 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) seq_printf(m, "Nonlinear: %8lu kB\n", mss.nonlinear >> 10); + show_smap_vma_flags(m, vma); + if (m->count < m->size) /* vma is copied successfully */ m->version = (vma != get_gate_vma(task->mm)) ? vma->vm_start : 0; @@ -643,7 +696,7 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr, spinlock_t *ptl; struct page *page; - split_huge_page_pmd(walk->mm, pmd); + split_huge_page_pmd(vma, addr, pmd); if (pmd_trans_unstable(pmd)) return 0; @@ -1126,7 +1179,7 @@ static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma, return NULL; nid = page_to_nid(page); - if (!node_isset(nid, node_states[N_HIGH_MEMORY])) + if (!node_isset(nid, node_states[N_MEMORY])) return NULL; return page; @@ -1225,7 +1278,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid) walk.mm = mm; pol = get_vma_policy(task, vma, vma->vm_start); - mpol_to_str(buffer, sizeof(buffer), pol, 0); + mpol_to_str(buffer, sizeof(buffer), pol); mpol_cond_put(pol); seq_printf(m, "%08lx %s", vma->vm_start, buffer); @@ -1279,7 +1332,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid) if (md->writeback) seq_printf(m, " writeback=%lu", md->writeback); - for_each_node_state(n, N_HIGH_MEMORY) + for_each_node_state(n, N_MEMORY) if (md->node[n]) seq_printf(m, " N%d=%lu", n, md->node[n]); out: diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c index 2d57e1ac011..43b12807a51 100644 --- a/fs/pstore/ftrace.c +++ b/fs/pstore/ftrace.c @@ -28,7 +28,9 @@ #include "internal.h" static void notrace pstore_ftrace_call(unsigned long ip, - unsigned long parent_ip) + unsigned long parent_ip, + struct ftrace_ops *op, + struct pt_regs *regs) { unsigned long flags; struct pstore_ftrace_record rec = {}; diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index 4ab572e6d27..67de74ca85f 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -49,6 +49,7 @@ struct pstore_private { struct pstore_info *psi; enum pstore_type_id type; u64 id; + int count; ssize_t size; char data[]; }; @@ -150,13 +151,13 @@ static int pstore_file_open(struct inode *inode, struct file *file) return 0; } -static loff_t pstore_file_llseek(struct file *file, loff_t off, int origin) +static loff_t pstore_file_llseek(struct file *file, loff_t off, int whence) { struct seq_file *sf = file->private_data; if (sf->op) - return seq_lseek(file, off, origin); - return default_llseek(file, off, origin); + return seq_lseek(file, off, whence); + return default_llseek(file, off, whence); } static const struct file_operations pstore_file_operations = { @@ -175,7 +176,8 @@ static int pstore_unlink(struct inode *dir, struct dentry *dentry) struct pstore_private *p = dentry->d_inode->i_private; if (p->psi->erase) - p->psi->erase(p->type, p->id, p->psi); + p->psi->erase(p->type, p->id, p->count, + dentry->d_inode->i_ctime, p->psi); return simple_unlink(dir, dentry); } @@ -270,7 +272,7 @@ int pstore_is_mounted(void) * Load it up with "size" bytes of data from "buf". * Set the mtime & ctime to the date that this record was originally stored. */ -int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, +int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count, char *data, size_t size, struct timespec time, struct pstore_info *psi) { @@ -306,6 +308,7 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, goto fail_alloc; private->type = type; private->id = id; + private->count = count; private->psi = psi; switch (type) { diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h index 4847f588b7d..937d820f273 100644 --- a/fs/pstore/internal.h +++ b/fs/pstore/internal.h @@ -50,7 +50,7 @@ extern struct pstore_info *psinfo; extern void pstore_set_kmsg_bytes(int); extern void pstore_get_records(int); extern int pstore_mkfile(enum pstore_type_id, char *psname, u64 id, - char *data, size_t size, + int count, char *data, size_t size, struct timespec time, struct pstore_info *psi); extern int pstore_is_mounted(void); diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index a40da07e93d..5ea2e77ff02 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -136,7 +136,7 @@ static void pstore_dump(struct kmsg_dumper *dumper, break; ret = psinfo->write(PSTORE_TYPE_DMESG, reason, &id, part, - hsize + len, psinfo); + oopscount, hsize + len, psinfo); if (ret == 0 && reason == KMSG_DUMP_OOPS && pstore_is_mounted()) pstore_new_entry = 1; @@ -161,6 +161,7 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c) while (s < e) { unsigned long flags; + u64 id; if (c > psinfo->bufsize) c = psinfo->bufsize; @@ -172,7 +173,7 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c) spin_lock_irqsave(&psinfo->buf_lock, flags); } memcpy(psinfo->buf, s, c); - psinfo->write(PSTORE_TYPE_CONSOLE, 0, NULL, 0, c, psinfo); + psinfo->write(PSTORE_TYPE_CONSOLE, 0, &id, 0, 0, c, psinfo); spin_unlock_irqrestore(&psinfo->buf_lock, flags); s += c; c = e - s; @@ -196,7 +197,7 @@ static void pstore_register_console(void) {} static int pstore_write_compat(enum pstore_type_id type, enum kmsg_dump_reason reason, - u64 *id, unsigned int part, + u64 *id, unsigned int part, int count, size_t size, struct pstore_info *psi) { return psi->write_buf(type, reason, id, part, psinfo->buf, size, psi); @@ -266,6 +267,7 @@ void pstore_get_records(int quiet) char *buf = NULL; ssize_t size; u64 id; + int count; enum pstore_type_id type; struct timespec time; int failed = 0, rc; @@ -277,9 +279,9 @@ void pstore_get_records(int quiet) if (psi->open && psi->open(psi)) goto out; - while ((size = psi->read(&id, &type, &time, &buf, psi)) > 0) { - rc = pstore_mkfile(type, psi->name, id, buf, (size_t)size, - time, psi); + while ((size = psi->read(&id, &type, &count, &time, &buf, psi)) > 0) { + rc = pstore_mkfile(type, psi->name, id, count, buf, + (size_t)size, time, psi); kfree(buf); buf = NULL; if (rc && (rc != -EEXIST || !quiet)) diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 1a4f6da58ea..7003e5266f2 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -132,9 +132,8 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max, } static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, - struct timespec *time, - char **buf, - struct pstore_info *psi) + int *count, struct timespec *time, + char **buf, struct pstore_info *psi) { ssize_t size; struct ramoops_context *cxt = psi->data; @@ -189,7 +188,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, struct pstore_info *psi) { struct ramoops_context *cxt = psi->data; - struct persistent_ram_zone *prz = cxt->przs[cxt->dump_write_cnt]; + struct persistent_ram_zone *prz; size_t hlen; if (type == PSTORE_TYPE_CONSOLE) { @@ -226,6 +225,11 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, if (part != 1) return -ENOSPC; + if (!cxt->przs) + return -ENOSPC; + + prz = cxt->przs[cxt->dump_write_cnt]; + hlen = ramoops_write_kmsg_hdr(prz); if (size + hlen > prz->buffer_size) size = prz->buffer_size - hlen; @@ -236,8 +240,8 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, return 0; } -static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, - struct pstore_info *psi) +static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, int count, + struct timespec time, struct pstore_info *psi) { struct ramoops_context *cxt = psi->data; struct persistent_ram_zone *prz; @@ -288,7 +292,7 @@ static void ramoops_free_przs(struct ramoops_context *cxt) } static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt, - phys_addr_t *paddr, size_t dump_mem_sz) + phys_addr_t *paddr, size_t dump_mem_sz) { int err = -ENOMEM; int i; @@ -296,6 +300,11 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt, if (!cxt->record_size) return 0; + if (*paddr + dump_mem_sz - cxt->phys_addr > cxt->size) { + dev_err(dev, "no room for dumps\n"); + return -ENOMEM; + } + cxt->max_dump_cnt = dump_mem_sz / cxt->record_size; if (!cxt->max_dump_cnt) return -ENOMEM; @@ -333,8 +342,12 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, if (!sz) return 0; - if (*paddr + sz > *paddr + cxt->size) + if (*paddr + sz - cxt->phys_addr > cxt->size) { + dev_err(dev, "no room for mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n", + sz, (unsigned long long)*paddr, + cxt->size, (unsigned long long)cxt->phys_addr); return -ENOMEM; + } *prz = persistent_ram_new(*paddr, sz, sig, cxt->ecc_size); if (IS_ERR(*prz)) { @@ -352,7 +365,7 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, return 0; } -static int __devinit ramoops_probe(struct platform_device *pdev) +static int ramoops_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct ramoops_platform_data *pdata = pdev->dev.platform_data; @@ -374,10 +387,14 @@ static int __devinit ramoops_probe(struct platform_device *pdev) goto fail_out; } - pdata->mem_size = rounddown_pow_of_two(pdata->mem_size); - pdata->record_size = rounddown_pow_of_two(pdata->record_size); - pdata->console_size = rounddown_pow_of_two(pdata->console_size); - pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size); + if (!is_power_of_2(pdata->mem_size)) + pdata->mem_size = rounddown_pow_of_two(pdata->mem_size); + if (!is_power_of_2(pdata->record_size)) + pdata->record_size = rounddown_pow_of_two(pdata->record_size); + if (!is_power_of_2(pdata->console_size)) + pdata->console_size = rounddown_pow_of_two(pdata->console_size); + if (!is_power_of_2(pdata->ftrace_size)) + pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size); cxt->dump_read_cnt = 0; cxt->size = pdata->mem_size; diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index eecd2a8a84d..0306303be37 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -390,8 +390,8 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size, return 0; } -static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, - u32 sig, int ecc_size) +static int persistent_ram_post_init(struct persistent_ram_zone *prz, u32 sig, + int ecc_size) { int ret; @@ -443,9 +443,8 @@ void persistent_ram_free(struct persistent_ram_zone *prz) kfree(prz); } -struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, - size_t size, u32 sig, - int ecc_size) +struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size, + u32 sig, int ecc_size) { struct persistent_ram_zone *prz; int ret = -ENOMEM; diff --git a/fs/quota/quota.c b/fs/quota/quota.c index af1661f7a54..c7314f1771f 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -307,6 +307,8 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, } } +#ifdef CONFIG_BLOCK + /* Return 1 if 'cmd' will block on frozen filesystem */ static int quotactl_cmd_write(int cmd) { @@ -322,6 +324,8 @@ static int quotactl_cmd_write(int cmd) return 1; } +#endif /* CONFIG_BLOCK */ + /* * look up a superblock on which quota ops will be performed * - use the name of a block device to find the superblock thereon diff --git a/fs/read_write.c b/fs/read_write.c index d06534857e9..bb34af31528 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -54,7 +54,7 @@ static loff_t lseek_execute(struct file *file, struct inode *inode, * generic_file_llseek_size - generic llseek implementation for regular files * @file: file structure to seek on * @offset: file offset to seek to - * @origin: type of seek + * @whence: type of seek * @size: max size of this file in file system * @eof: offset used for SEEK_END position * @@ -67,12 +67,12 @@ static loff_t lseek_execute(struct file *file, struct inode *inode, * read/writes behave like SEEK_SET against seeks. */ loff_t -generic_file_llseek_size(struct file *file, loff_t offset, int origin, +generic_file_llseek_size(struct file *file, loff_t offset, int whence, loff_t maxsize, loff_t eof) { struct inode *inode = file->f_mapping->host; - switch (origin) { + switch (whence) { case SEEK_END: offset += eof; break; @@ -122,17 +122,17 @@ EXPORT_SYMBOL(generic_file_llseek_size); * generic_file_llseek - generic llseek implementation for regular files * @file: file structure to seek on * @offset: file offset to seek to - * @origin: type of seek + * @whence: type of seek * * This is a generic implemenation of ->llseek useable for all normal local * filesystems. It just updates the file offset to the value specified by - * @offset and @origin under i_mutex. + * @offset and @whence under i_mutex. */ -loff_t generic_file_llseek(struct file *file, loff_t offset, int origin) +loff_t generic_file_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_mapping->host; - return generic_file_llseek_size(file, offset, origin, + return generic_file_llseek_size(file, offset, whence, inode->i_sb->s_maxbytes, i_size_read(inode)); } @@ -142,32 +142,32 @@ EXPORT_SYMBOL(generic_file_llseek); * noop_llseek - No Operation Performed llseek implementation * @file: file structure to seek on * @offset: file offset to seek to - * @origin: type of seek + * @whence: type of seek * * This is an implementation of ->llseek useable for the rare special case when * userspace expects the seek to succeed but the (device) file is actually not * able to perform the seek. In this case you use noop_llseek() instead of * falling back to the default implementation of ->llseek. */ -loff_t noop_llseek(struct file *file, loff_t offset, int origin) +loff_t noop_llseek(struct file *file, loff_t offset, int whence) { return file->f_pos; } EXPORT_SYMBOL(noop_llseek); -loff_t no_llseek(struct file *file, loff_t offset, int origin) +loff_t no_llseek(struct file *file, loff_t offset, int whence) { return -ESPIPE; } EXPORT_SYMBOL(no_llseek); -loff_t default_llseek(struct file *file, loff_t offset, int origin) +loff_t default_llseek(struct file *file, loff_t offset, int whence) { struct inode *inode = file->f_path.dentry->d_inode; loff_t retval; mutex_lock(&inode->i_mutex); - switch (origin) { + switch (whence) { case SEEK_END: offset += i_size_read(inode); break; @@ -216,7 +216,7 @@ out: } EXPORT_SYMBOL(default_llseek); -loff_t vfs_llseek(struct file *file, loff_t offset, int origin) +loff_t vfs_llseek(struct file *file, loff_t offset, int whence) { loff_t (*fn)(struct file *, loff_t, int); @@ -225,11 +225,11 @@ loff_t vfs_llseek(struct file *file, loff_t offset, int origin) if (file->f_op && file->f_op->llseek) fn = file->f_op->llseek; } - return fn(file, offset, origin); + return fn(file, offset, whence); } EXPORT_SYMBOL(vfs_llseek); -SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, origin) +SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, whence) { off_t retval; struct fd f = fdget(fd); @@ -237,8 +237,8 @@ SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, origin) return -EBADF; retval = -EINVAL; - if (origin <= SEEK_MAX) { - loff_t res = vfs_llseek(f.file, offset, origin); + if (whence <= SEEK_MAX) { + loff_t res = vfs_llseek(f.file, offset, whence); retval = res; if (res != (loff_t)retval) retval = -EOVERFLOW; /* LFS: should only happen on 32 bit platforms */ @@ -250,7 +250,7 @@ SYSCALL_DEFINE3(lseek, unsigned int, fd, off_t, offset, unsigned int, origin) #ifdef __ARCH_WANT_SYS_LLSEEK SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high, unsigned long, offset_low, loff_t __user *, result, - unsigned int, origin) + unsigned int, whence) { int retval; struct fd f = fdget(fd); @@ -260,11 +260,11 @@ SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high, return -EBADF; retval = -EINVAL; - if (origin > SEEK_MAX) + if (whence > SEEK_MAX) goto out_putf; offset = vfs_llseek(f.file, ((loff_t) offset_high << 32) | offset_low, - origin); + whence); retval = (int)offset; if (offset >= 0) { @@ -935,6 +935,8 @@ ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, size_t count, if (retval > 0) { add_rchar(current, retval); add_wchar(current, retval); + fsnotify_access(in.file); + fsnotify_modify(out.file); } inc_syscr(current); diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c index 8375c922c0d..50302d6f889 100644 --- a/fs/reiserfs/file.c +++ b/fs/reiserfs/file.c @@ -126,7 +126,7 @@ static int reiserfs_file_open(struct inode *inode, struct file *file) return err; } -static void reiserfs_vfs_truncate_file(struct inode *inode) +void reiserfs_vfs_truncate_file(struct inode *inode) { mutex_lock(&(REISERFS_I(inode)->tailpack)); reiserfs_truncate_file(inode, 1); @@ -312,7 +312,6 @@ const struct file_operations reiserfs_file_operations = { }; const struct inode_operations reiserfs_file_inode_operations = { - .truncate = reiserfs_vfs_truncate_file, .setattr = reiserfs_setattr, .setxattr = reiserfs_setxattr, .getxattr = reiserfs_getxattr, diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index f27f01a98aa..95d7680ead4 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -1782,8 +1782,9 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, BUG_ON(!th->t_trans_id); - dquot_initialize(inode); + reiserfs_write_unlock(inode->i_sb); err = dquot_alloc_inode(inode); + reiserfs_write_lock(inode->i_sb); if (err) goto out_end_trans; if (!dir->i_nlink) { @@ -1979,8 +1980,10 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, out_end_trans: journal_end(th, th->t_super, th->t_blocks_allocated); + reiserfs_write_unlock(inode->i_sb); /* Drop can be outside and it needs more credits so it's better to have it outside */ dquot_drop(inode); + reiserfs_write_lock(inode->i_sb); inode->i_flags |= S_NOQUOTA; make_bad_inode(inode); @@ -3082,8 +3085,10 @@ static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb, loff_t isize = i_size_read(inode); loff_t end = offset + iov_length(iov, nr_segs); - if (end > isize) - vmtruncate(inode, isize); + if ((end > isize) && inode_newsize_ok(inode, isize) == 0) { + truncate_setsize(inode, isize); + reiserfs_vfs_truncate_file(inode); + } } return ret; @@ -3103,10 +3108,9 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) /* must be turned off for recursive notify_change calls */ ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID); - depth = reiserfs_write_lock_once(inode->i_sb); if (is_quota_modification(inode, attr)) dquot_initialize(inode); - + depth = reiserfs_write_lock_once(inode->i_sb); if (attr->ia_valid & ATTR_SIZE) { /* version 2 items will be caught by the s_maxbytes check ** done for us in vmtruncate @@ -3170,7 +3174,9 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) error = journal_begin(&th, inode->i_sb, jbegin_count); if (error) goto out; + reiserfs_write_unlock_once(inode->i_sb, depth); error = dquot_transfer(inode, attr); + depth = reiserfs_write_lock_once(inode->i_sb); if (error) { journal_end(&th, inode->i_sb, jbegin_count); goto out; @@ -3196,8 +3202,13 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) */ reiserfs_write_unlock_once(inode->i_sb, depth); if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) - error = vmtruncate(inode, attr->ia_size); + attr->ia_size != i_size_read(inode)) { + error = inode_newsize_ok(inode, attr->ia_size); + if (!error) { + truncate_setsize(inode, attr->ia_size); + reiserfs_vfs_truncate_file(inode); + } + } if (!error) { setattr_copy(inode, attr); diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h index 33215f57ea0..157e474ab30 100644 --- a/fs/reiserfs/reiserfs.h +++ b/fs/reiserfs/reiserfs.h @@ -2455,6 +2455,7 @@ struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct *, int count); int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *); +void reiserfs_vfs_truncate_file(struct inode *inode); int reiserfs_commit_page(struct inode *inode, struct page *page, unsigned from, unsigned to); void reiserfs_flush_old_commits(struct super_block *); diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c index f8afa4b162b..2f40a4c70a4 100644 --- a/fs/reiserfs/stree.c +++ b/fs/reiserfs/stree.c @@ -1968,7 +1968,9 @@ int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct tree key2type(&(key->on_disk_key))); #endif + reiserfs_write_unlock(inode->i_sb); retval = dquot_alloc_space_nodirty(inode, pasted_size); + reiserfs_write_lock(inode->i_sb); if (retval) { pathrelse(search_path); return retval; @@ -2061,9 +2063,11 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th, "reiserquota insert_item(): allocating %u id=%u type=%c", quota_bytes, inode->i_uid, head2type(ih)); #endif + reiserfs_write_unlock(inode->i_sb); /* We can't dirty inode here. It would be immediately written but * appropriate stat item isn't inserted yet... */ retval = dquot_alloc_space_nodirty(inode, quota_bytes); + reiserfs_write_lock(inode->i_sb); if (retval) { pathrelse(path); return retval; diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 1078ae17999..418bdc3a57d 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -298,7 +298,9 @@ static int finish_unfinished(struct super_block *s) retval = remove_save_link_only(s, &save_link_key, 0); continue; } + reiserfs_write_unlock(s); dquot_initialize(inode); + reiserfs_write_lock(s); if (truncate && S_ISDIR(inode->i_mode)) { /* We got a truncate request for a dir which is impossible. @@ -1335,7 +1337,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) kfree(qf_names[i]); #endif err = -EINVAL; - goto out_err; + goto out_unlock; } #ifdef CONFIG_QUOTA handle_quota_files(s, qf_names, &qfmt); @@ -1379,7 +1381,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) if (blocks) { err = reiserfs_resize(s, blocks); if (err != 0) - goto out_err; + goto out_unlock; } if (*mount_flags & MS_RDONLY) { @@ -1389,9 +1391,15 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) /* it is read-only already */ goto out_ok; + /* + * Drop write lock. Quota will retake it when needed and lock + * ordering requires calling dquot_suspend() without it. + */ + reiserfs_write_unlock(s); err = dquot_suspend(s, -1); if (err < 0) goto out_err; + reiserfs_write_lock(s); /* try to remount file system with read-only permissions */ if (sb_umount_state(rs) == REISERFS_VALID_FS @@ -1401,7 +1409,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) err = journal_begin(&th, s, 10); if (err) - goto out_err; + goto out_unlock; /* Mounting a rw partition read-only. */ reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); @@ -1416,7 +1424,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) if (reiserfs_is_journal_aborted(journal)) { err = journal->j_errno; - goto out_err; + goto out_unlock; } handle_data_mode(s, mount_options); @@ -1425,7 +1433,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */ err = journal_begin(&th, s, 10); if (err) - goto out_err; + goto out_unlock; /* Mount a partition which is read-only, read-write */ reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1); @@ -1442,10 +1450,16 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg) SB_JOURNAL(s)->j_must_wait = 1; err = journal_end(&th, s, 10); if (err) - goto out_err; + goto out_unlock; if (!(*mount_flags & MS_RDONLY)) { + /* + * Drop write lock. Quota will retake it when needed and lock + * ordering requires calling dquot_resume() without it. + */ + reiserfs_write_unlock(s); dquot_resume(s, -1); + reiserfs_write_lock(s); finish_unfinished(s); reiserfs_xattr_init(s, *mount_flags); } @@ -1455,9 +1469,10 @@ out_ok: reiserfs_write_unlock(s); return 0; +out_unlock: + reiserfs_write_unlock(s); out_err: kfree(new_opts); - reiserfs_write_unlock(s); return err; } @@ -2095,13 +2110,15 @@ static int reiserfs_write_dquot(struct dquot *dquot) REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); if (ret) goto out; + reiserfs_write_unlock(dquot->dq_sb); ret = dquot_commit(dquot); + reiserfs_write_lock(dquot->dq_sb); err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); if (!ret && err) ret = err; - out: +out: reiserfs_write_unlock(dquot->dq_sb); return ret; } @@ -2117,13 +2134,15 @@ static int reiserfs_acquire_dquot(struct dquot *dquot) REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); if (ret) goto out; + reiserfs_write_unlock(dquot->dq_sb); ret = dquot_acquire(dquot); + reiserfs_write_lock(dquot->dq_sb); err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb)); if (!ret && err) ret = err; - out: +out: reiserfs_write_unlock(dquot->dq_sb); return ret; } @@ -2137,19 +2156,21 @@ static int reiserfs_release_dquot(struct dquot *dquot) ret = journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); + reiserfs_write_unlock(dquot->dq_sb); if (ret) { /* Release dquot anyway to avoid endless cycle in dqput() */ dquot_release(dquot); goto out; } ret = dquot_release(dquot); + reiserfs_write_lock(dquot->dq_sb); err = journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb)); if (!ret && err) ret = err; - out: reiserfs_write_unlock(dquot->dq_sb); +out: return ret; } @@ -2174,11 +2195,13 @@ static int reiserfs_write_info(struct super_block *sb, int type) ret = journal_begin(&th, sb, 2); if (ret) goto out; + reiserfs_write_unlock(sb); ret = dquot_commit_info(sb, type); + reiserfs_write_lock(sb); err = journal_end(&th, sb, 2); if (!ret && err) ret = err; - out: +out: reiserfs_write_unlock(sb); return ret; } @@ -2203,8 +2226,11 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, struct reiserfs_transaction_handle th; int opt = type == USRQUOTA ? REISERFS_USRQUOTA : REISERFS_GRPQUOTA; - if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) - return -EINVAL; + reiserfs_write_lock(sb); + if (!(REISERFS_SB(sb)->s_mount_opt & (1 << opt))) { + err = -EINVAL; + goto out; + } /* Quotafile not on the same filesystem? */ if (path->dentry->d_sb != sb) { @@ -2246,8 +2272,10 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, if (err) goto out; } - err = dquot_quota_on(sb, type, format_id, path); + reiserfs_write_unlock(sb); + return dquot_quota_on(sb, type, format_id, path); out: + reiserfs_write_unlock(sb); return err; } @@ -2320,7 +2348,9 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type, tocopy = sb->s_blocksize - offset < towrite ? sb->s_blocksize - offset : towrite; tmp_bh.b_state = 0; + reiserfs_write_lock(sb); err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); + reiserfs_write_unlock(sb); if (err) goto out; if (offset || tocopy != sb->s_blocksize) @@ -2336,10 +2366,12 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type, flush_dcache_page(bh->b_page); set_buffer_uptodate(bh); unlock_buffer(bh); + reiserfs_write_lock(sb); reiserfs_prepare_for_journal(sb, bh, 1); journal_mark_dirty(current->journal_info, sb, bh); if (!journal_quota) reiserfs_add_ordered_list(inode, bh); + reiserfs_write_unlock(sb); brelse(bh); offset = 0; towrite -= tocopy; diff --git a/fs/seq_file.c b/fs/seq_file.c index 99dffab4c4e..f2bc3dfd0b8 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -296,18 +296,18 @@ EXPORT_SYMBOL(seq_read); * seq_lseek - ->llseek() method for sequential files. * @file: the file in question * @offset: new position - * @origin: 0 for absolute, 1 for relative position + * @whence: 0 for absolute, 1 for relative position * * Ready-made ->f_op->llseek() */ -loff_t seq_lseek(struct file *file, loff_t offset, int origin) +loff_t seq_lseek(struct file *file, loff_t offset, int whence) { struct seq_file *m = file->private_data; loff_t retval = -EINVAL; mutex_lock(&m->lock); m->version = file->f_version; - switch (origin) { + switch (whence) { case 1: offset += file->f_pos; case 0: diff --git a/fs/signalfd.c b/fs/signalfd.c index 8bee4e57091..b5348696173 100644 --- a/fs/signalfd.c +++ b/fs/signalfd.c @@ -29,6 +29,7 @@ #include <linux/anon_inodes.h> #include <linux/signalfd.h> #include <linux/syscalls.h> +#include <linux/proc_fs.h> void signalfd_cleanup(struct sighand_struct *sighand) { @@ -227,7 +228,24 @@ static ssize_t signalfd_read(struct file *file, char __user *buf, size_t count, return total ? total: ret; } +#ifdef CONFIG_PROC_FS +static int signalfd_show_fdinfo(struct seq_file *m, struct file *f) +{ + struct signalfd_ctx *ctx = f->private_data; + sigset_t sigmask; + + sigmask = ctx->sigmask; + signotset(&sigmask); + render_sigset_t(m, "sigmask:\t", &sigmask); + + return 0; +} +#endif + static const struct file_operations signalfd_fops = { +#ifdef CONFIG_PROC_FS + .show_fdinfo = signalfd_show_fdinfo, +#endif .release = signalfd_release, .poll = signalfd_poll, .read = signalfd_read, diff --git a/fs/splice.c b/fs/splice.c index 13e5b4776e7..6909d89d0da 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -696,8 +696,10 @@ static int pipe_to_sendpage(struct pipe_inode_info *pipe, return -EINVAL; more = (sd->flags & SPLICE_F_MORE) ? MSG_MORE : 0; - if (sd->len < sd->total_len) + + if (sd->len < sd->total_len && pipe->nrbufs > 1) more |= MSG_SENDPAGE_NOTLAST; + return file->f_op->sendpage(file, buf->page, buf->offset, sd->len, &pos, more); } @@ -1024,17 +1026,14 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out, ret = sd.num_spliced; if (ret > 0) { - unsigned long nr_pages; int err; - nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; - err = generic_write_sync(out, *ppos, ret); if (err) ret = err; else *ppos += ret; - balance_dirty_pages_ratelimited_nr(mapping, nr_pages); + balance_dirty_pages_ratelimited(mapping); } sb_end_write(inode->i_sb); diff --git a/fs/stat.c b/fs/stat.c index eae494630a3..14f45459c83 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -74,7 +74,7 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat, { struct path path; int error = -EINVAL; - int lookup_flags = 0; + unsigned int lookup_flags = 0; if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT | AT_EMPTY_PATH)) != 0) @@ -84,13 +84,17 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat, lookup_flags |= LOOKUP_FOLLOW; if (flag & AT_EMPTY_PATH) lookup_flags |= LOOKUP_EMPTY; - +retry: error = user_path_at(dfd, filename, lookup_flags, &path); if (error) goto out; error = vfs_getattr(path.mnt, path.dentry, stat); path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } out: return error; } @@ -296,11 +300,13 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname, struct path path; int error; int empty = 0; + unsigned int lookup_flags = LOOKUP_EMPTY; if (bufsiz <= 0) return -EINVAL; - error = user_path_at_empty(dfd, pathname, LOOKUP_EMPTY, &path, &empty); +retry: + error = user_path_at_empty(dfd, pathname, lookup_flags, &path, &empty); if (!error) { struct inode *inode = path.dentry->d_inode; @@ -314,6 +320,10 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname, } } path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } } return error; } diff --git a/fs/statfs.c b/fs/statfs.c index f8e832e6f0a..c219e733f55 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -77,10 +77,17 @@ EXPORT_SYMBOL(vfs_statfs); int user_statfs(const char __user *pathname, struct kstatfs *st) { struct path path; - int error = user_path_at(AT_FDCWD, pathname, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path); + int error; + unsigned int lookup_flags = LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (!error) { error = vfs_statfs(&path, st); path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } } return error; } diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 00012e31829..602f56db044 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -485,8 +485,8 @@ const struct file_operations sysfs_file_operations = { .poll = sysfs_poll, }; -int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr, - const void **pns) +static int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr, + const void **pns) { struct sysfs_dirent *dir_sd = kobj->sd; const struct sysfs_ops *ops; diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c index 71eb7e25392..db940a9be04 100644 --- a/fs/sysfs/mount.c +++ b/fs/sysfs/mount.c @@ -149,6 +149,7 @@ static struct file_system_type sysfs_fs_type = { .name = "sysfs", .mount = sysfs_mount, .kill_sb = sysfs_kill_sb, + .fs_flags = FS_USERNS_MOUNT, }; int __init sysfs_init(void) diff --git a/fs/sysv/file.c b/fs/sysv/file.c index 0a65939508e..9d4dc683179 100644 --- a/fs/sysv/file.c +++ b/fs/sysv/file.c @@ -41,9 +41,11 @@ static int sysv_setattr(struct dentry *dentry, struct iattr *attr) if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, attr->ia_size); + error = inode_newsize_ok(inode, attr->ia_size); if (error) return error; + truncate_setsize(inode, attr->ia_size); + sysv_truncate(inode); } setattr_copy(inode, attr); @@ -52,7 +54,6 @@ static int sysv_setattr(struct dentry *dentry, struct iattr *attr) } const struct inode_operations sysv_file_inode_operations = { - .truncate = sysv_truncate, .setattr = sysv_setattr, .getattr = sysv_getattr, }; diff --git a/fs/sysv/itree.c b/fs/sysv/itree.c index 90b54b43878..c1a591a4725 100644 --- a/fs/sysv/itree.c +++ b/fs/sysv/itree.c @@ -464,6 +464,16 @@ int sysv_prepare_chunk(struct page *page, loff_t pos, unsigned len) return __block_write_begin(page, pos, len, get_block); } +static void sysv_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) { + truncate_pagecache(inode, to, inode->i_size); + sysv_truncate(inode); + } +} + static int sysv_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -471,11 +481,8 @@ static int sysv_write_begin(struct file *file, struct address_space *mapping, int ret; ret = block_write_begin(mapping, pos, len, flags, pagep, get_block); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + sysv_write_failed(mapping, pos + len); return ret; } diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index 62911637e12..12817ffc734 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -2560,7 +2560,7 @@ static int power_cut_emulated(struct ubifs_info *c, int lnum, int write) static int corrupt_data(const struct ubifs_info *c, const void *buf, unsigned int len) { - unsigned int from, to, i, ffs = chance(1, 2); + unsigned int from, to, ffs = chance(1, 2); unsigned char *p = (void *)buf; from = random32() % (len + 1); @@ -2571,11 +2571,9 @@ static int corrupt_data(const struct ubifs_info *c, const void *buf, ffs ? "0xFFs" : "random data"); if (ffs) - for (i = from; i < to; i++) - p[i] = 0xFF; + memset(p + from, 0xFF, to - from); else - for (i = from; i < to; i++) - p[i] = random32() % 0x100; + prandom_bytes(p + from, to - from); return to; } diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index e271fba1651..8a574776a49 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -453,11 +453,11 @@ out: } /* If a directory is seeked, we have to free saved readdir() state */ -static loff_t ubifs_dir_llseek(struct file *file, loff_t offset, int origin) +static loff_t ubifs_dir_llseek(struct file *file, loff_t offset, int whence) { kfree(file->private_data); file->private_data = NULL; - return generic_file_llseek(file, offset, origin); + return generic_file_llseek(file, offset, whence); } /* Free saved readdir() state when the directory is closed */ diff --git a/fs/ubifs/find.c b/fs/ubifs/find.c index 28ec13af28d..2dcf3d473fe 100644 --- a/fs/ubifs/find.c +++ b/fs/ubifs/find.c @@ -681,8 +681,16 @@ int ubifs_find_free_leb_for_idx(struct ubifs_info *c) if (!lprops) { lprops = ubifs_fast_find_freeable(c); if (!lprops) { - ubifs_assert(c->freeable_cnt == 0); - if (c->lst.empty_lebs - c->lst.taken_empty_lebs > 0) { + /* + * The first condition means the following: go scan the + * LPT if there are uncategorized lprops, which means + * there may be freeable LEBs there (UBIFS does not + * store the information about freeable LEBs in the + * master node). + */ + if (c->in_a_category_cnt != c->main_lebs || + c->lst.empty_lebs - c->lst.taken_empty_lebs > 0) { + ubifs_assert(c->freeable_cnt == 0); lprops = scan_for_leb_for_idx(c); if (IS_ERR(lprops)) { err = PTR_ERR(lprops); diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c index e5a2a35a46d..46190a7c42a 100644 --- a/fs/ubifs/lprops.c +++ b/fs/ubifs/lprops.c @@ -300,8 +300,11 @@ void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops, default: ubifs_assert(0); } + lprops->flags &= ~LPROPS_CAT_MASK; lprops->flags |= cat; + c->in_a_category_cnt += 1; + ubifs_assert(c->in_a_category_cnt <= c->main_lebs); } /** @@ -334,6 +337,9 @@ static void ubifs_remove_from_cat(struct ubifs_info *c, default: ubifs_assert(0); } + + c->in_a_category_cnt -= 1; + ubifs_assert(c->in_a_category_cnt >= 0); } /** diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index 5486346d0a3..d133c276fe0 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -1183,6 +1183,8 @@ struct ubifs_debug_info; * @freeable_list: list of freeable non-index LEBs (free + dirty == @leb_size) * @frdi_idx_list: list of freeable index LEBs (free + dirty == @leb_size) * @freeable_cnt: number of freeable LEBs in @freeable_list + * @in_a_category_cnt: count of lprops which are in a certain category, which + * basically meants that they were loaded from the flash * * @ltab_lnum: LEB number of LPT's own lprops table * @ltab_offs: offset of LPT's own lprops table @@ -1412,6 +1414,7 @@ struct ubifs_info { struct list_head freeable_list; struct list_head frdi_idx_list; int freeable_cnt; + int in_a_category_cnt; int ltab_lnum; int ltab_offs; diff --git a/fs/udf/inode.c b/fs/udf/inode.c index df88b957ccf..cbae1ed0b7c 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -587,7 +587,6 @@ out: static sector_t inode_getblk(struct inode *inode, sector_t block, int *err, int *new) { - static sector_t last_block; struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; struct extent_position prev_epos, cur_epos, next_epos; int count = 0, startnum = 0, endnum = 0; @@ -601,6 +600,7 @@ static sector_t inode_getblk(struct inode *inode, sector_t block, struct udf_inode_info *iinfo = UDF_I(inode); int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; int lastblock = 0; + bool isBeyondEOF; *err = 0; *new = 0; @@ -676,11 +676,10 @@ static sector_t inode_getblk(struct inode *inode, sector_t block, return newblock; } - last_block = block; /* Are we beyond EOF? */ if (etype == -1) { int ret; - + isBeyondEOF = 1; if (count) { if (c) laarr[0] = laarr[1]; @@ -718,11 +717,11 @@ static sector_t inode_getblk(struct inode *inode, sector_t block, memset(&laarr[c].extLocation, 0x00, sizeof(struct kernel_lb_addr)); count++; - endnum++; } endnum = c + 1; lastblock = 1; } else { + isBeyondEOF = 0; endnum = startnum = ((count > 2) ? 2 : count); /* if the current extent is in position 0, @@ -765,10 +764,13 @@ static sector_t inode_getblk(struct inode *inode, sector_t block, goal, err); if (!newblocknum) { brelse(prev_epos.bh); + brelse(cur_epos.bh); + brelse(next_epos.bh); *err = -ENOSPC; return 0; } - iinfo->i_lenExtents += inode->i_sb->s_blocksize; + if (isBeyondEOF) + iinfo->i_lenExtents += inode->i_sb->s_blocksize; } /* if the extent the requsted block is located in contains multiple @@ -795,6 +797,8 @@ static sector_t inode_getblk(struct inode *inode, sector_t block, udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); brelse(prev_epos.bh); + brelse(cur_epos.bh); + brelse(next_epos.bh); newblock = udf_get_pblock(inode->i_sb, newblocknum, iinfo->i_location.partitionReferenceNum, 0); diff --git a/fs/udf/super.c b/fs/udf/super.c index d44fb568abe..e9be396a558 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -307,7 +307,8 @@ static void udf_sb_free_partitions(struct super_block *sb) { struct udf_sb_info *sbi = UDF_SB(sb); int i; - + if (sbi->s_partmaps == NULL) + return; for (i = 0; i < sbi->s_partitions; i++) udf_free_partition(&sbi->s_partmaps[i]); kfree(sbi->s_partmaps); diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c index eb6d0b7dc87..ff24e4449ec 100644 --- a/fs/ufs/inode.c +++ b/fs/ufs/inode.c @@ -526,6 +526,14 @@ int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len) return __block_write_begin(page, pos, len, ufs_getfrag_block); } +static void ufs_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + + if (to > inode->i_size) + truncate_pagecache(inode, to, inode->i_size); +} + static int ufs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -534,11 +542,8 @@ static int ufs_write_begin(struct file *file, struct address_space *mapping, ret = block_write_begin(mapping, pos, len, flags, pagep, ufs_getfrag_block); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } + if (unlikely(ret)) + ufs_write_failed(mapping, pos + len); return ret; } diff --git a/fs/utimes.c b/fs/utimes.c index bb0696a4173..f4fb7eca10e 100644 --- a/fs/utimes.c +++ b/fs/utimes.c @@ -158,13 +158,17 @@ long do_utimes(int dfd, const char __user *filename, struct timespec *times, if (!(flags & AT_SYMLINK_NOFOLLOW)) lookup_flags |= LOOKUP_FOLLOW; - +retry: error = user_path_at(dfd, filename, lookup_flags, &path); if (error) goto out; error = utimes_common(&path, times); path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } } out: diff --git a/fs/xattr.c b/fs/xattr.c index e21c119f4f9..3377dff1840 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -370,8 +370,9 @@ SYSCALL_DEFINE5(setxattr, const char __user *, pathname, { struct path path; int error; - - error = user_path(pathname, &path); + unsigned int lookup_flags = LOOKUP_FOLLOW; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) return error; error = mnt_want_write(path.mnt); @@ -380,6 +381,10 @@ SYSCALL_DEFINE5(setxattr, const char __user *, pathname, mnt_drop_write(path.mnt); } path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -389,8 +394,9 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname, { struct path path; int error; - - error = user_lpath(pathname, &path); + unsigned int lookup_flags = 0; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) return error; error = mnt_want_write(path.mnt); @@ -399,6 +405,10 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname, mnt_drop_write(path.mnt); } path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -476,12 +486,17 @@ SYSCALL_DEFINE4(getxattr, const char __user *, pathname, { struct path path; ssize_t error; - - error = user_path(pathname, &path); + unsigned int lookup_flags = LOOKUP_FOLLOW; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) return error; error = getxattr(path.dentry, name, value, size); path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -490,12 +505,17 @@ SYSCALL_DEFINE4(lgetxattr, const char __user *, pathname, { struct path path; ssize_t error; - - error = user_lpath(pathname, &path); + unsigned int lookup_flags = 0; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) return error; error = getxattr(path.dentry, name, value, size); path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -556,12 +576,17 @@ SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list, { struct path path; ssize_t error; - - error = user_path(pathname, &path); + unsigned int lookup_flags = LOOKUP_FOLLOW; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) return error; error = listxattr(path.dentry, list, size); path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -570,12 +595,17 @@ SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list, { struct path path; ssize_t error; - - error = user_lpath(pathname, &path); + unsigned int lookup_flags = 0; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) return error; error = listxattr(path.dentry, list, size); path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -615,8 +645,9 @@ SYSCALL_DEFINE2(removexattr, const char __user *, pathname, { struct path path; int error; - - error = user_path(pathname, &path); + unsigned int lookup_flags = LOOKUP_FOLLOW; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) return error; error = mnt_want_write(path.mnt); @@ -625,6 +656,10 @@ SYSCALL_DEFINE2(removexattr, const char __user *, pathname, mnt_drop_write(path.mnt); } path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } @@ -633,8 +668,9 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname, { struct path path; int error; - - error = user_lpath(pathname, &path); + unsigned int lookup_flags = 0; +retry: + error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path); if (error) return error; error = mnt_want_write(path.mnt); @@ -643,6 +679,10 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname, mnt_drop_write(path.mnt); } path_put(&path); + if (retry_estale(error, lookup_flags)) { + lookup_flags |= LOOKUP_REVAL; + goto retry; + } return error; } diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig index 6100ec0fa1d..5a7ffe54f5d 100644 --- a/fs/xfs/Kconfig +++ b/fs/xfs/Kconfig @@ -2,6 +2,7 @@ config XFS_FS tristate "XFS filesystem support" depends on BLOCK select EXPORTFS + select LIBCRC32C help XFS is a high performance journaling filesystem which originated on the SGI IRIX platform. It is completely multi-threaded, can diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index d2bf974b1a2..d02201df855 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -37,9 +37,8 @@ xfs-y += xfs_aops.o \ xfs_file.o \ xfs_filestream.o \ xfs_fsops.o \ - xfs_fs_subr.o \ xfs_globals.o \ - xfs_iget.o \ + xfs_icache.o \ xfs_ioctl.o \ xfs_iomap.o \ xfs_iops.o \ @@ -47,7 +46,6 @@ xfs-y += xfs_aops.o \ xfs_message.o \ xfs_mru_cache.o \ xfs_super.o \ - xfs_sync.o \ xfs_xattr.o \ xfs_rename.o \ xfs_utils.o \ diff --git a/fs/xfs/uuid.h b/fs/xfs/uuid.h index 4732d71262c..104db0f3bed 100644 --- a/fs/xfs/uuid.h +++ b/fs/xfs/uuid.h @@ -26,4 +26,10 @@ extern int uuid_is_nil(uuid_t *uuid); extern int uuid_equal(uuid_t *uuid1, uuid_t *uuid2); extern void uuid_getnodeuniq(uuid_t *uuid, int fsid [2]); +static inline void +uuid_copy(uuid_t *dst, uuid_t *src) +{ + memcpy(dst, src, sizeof(uuid_t)); +} + #endif /* __XFS_SUPPORT_UUID_H__ */ diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h index 44d65c1533c..f2aeedb6a57 100644 --- a/fs/xfs/xfs_ag.h +++ b/fs/xfs/xfs_ag.h @@ -108,6 +108,8 @@ typedef struct xfs_agf { extern int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp, xfs_agnumber_t agno, int flags, struct xfs_buf **bpp); +extern const struct xfs_buf_ops xfs_agf_buf_ops; + /* * Size of the unlinked inode hash table in the agi. */ @@ -161,6 +163,8 @@ typedef struct xfs_agi { extern int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp, xfs_agnumber_t agno, struct xfs_buf **bpp); +extern const struct xfs_buf_ops xfs_agi_buf_ops; + /* * The third a.g. block contains the a.g. freelist, an array * of block pointers to blocks owned by the allocation btree code. @@ -233,6 +237,7 @@ typedef struct xfs_perag { #define XFS_ICI_NO_TAG (-1) /* special flag for an untagged lookup in xfs_inode_ag_iterator */ #define XFS_ICI_RECLAIM_TAG 0 /* inode is to be reclaimed */ +#define XFS_ICI_EOFBLOCKS_TAG 1 /* inode has blocks beyond EOF */ #define XFS_AG_MAXLEVELS(mp) ((mp)->m_ag_maxlevels) #define XFS_MIN_FREELIST_RAW(bl,cl,mp) \ diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 4f33c32affe..393055fe3ae 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -430,6 +430,60 @@ xfs_alloc_fixup_trees( return 0; } +static void +xfs_agfl_verify( + struct xfs_buf *bp) +{ +#ifdef WHEN_CRCS_COME_ALONG + /* + * we cannot actually do any verification of the AGFL because mkfs does + * not initialise the AGFL to zero or NULL. Hence the only valid part of + * the AGFL is what the AGF says is active. We can't get to the AGF, so + * we can't verify just those entries are valid. + * + * This problem goes away when the CRC format change comes along as that + * requires the AGFL to be initialised by mkfs. At that point, we can + * verify the blocks in the agfl -active or not- lie within the bounds + * of the AG. Until then, just leave this check ifdef'd out. + */ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_agfl *agfl = XFS_BUF_TO_AGFL(bp); + int agfl_ok = 1; + + int i; + + for (i = 0; i < XFS_AGFL_SIZE(mp); i++) { + if (be32_to_cpu(agfl->agfl_bno[i]) == NULLAGBLOCK || + be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks) + agfl_ok = 0; + } + + if (!agfl_ok) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agfl); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +#endif +} + +static void +xfs_agfl_write_verify( + struct xfs_buf *bp) +{ + xfs_agfl_verify(bp); +} + +static void +xfs_agfl_read_verify( + struct xfs_buf *bp) +{ + xfs_agfl_verify(bp); +} + +const struct xfs_buf_ops xfs_agfl_buf_ops = { + .verify_read = xfs_agfl_read_verify, + .verify_write = xfs_agfl_write_verify, +}; + /* * Read in the allocation group free block array. */ @@ -447,7 +501,7 @@ xfs_alloc_read_agfl( error = xfs_trans_read_buf( mp, tp, mp->m_ddev_targp, XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0, &bp); + XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_agfl_buf_ops); if (error) return error; ASSERT(!xfs_buf_geterror(bp)); @@ -1866,6 +1920,7 @@ xfs_alloc_fix_freelist( /* * Initialize the args structure. */ + memset(&targs, 0, sizeof(targs)); targs.tp = tp; targs.mp = mp; targs.agbp = agbp; @@ -2090,6 +2145,63 @@ xfs_alloc_put_freelist( return 0; } +static void +xfs_agf_verify( + struct xfs_buf *bp) + { + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_agf *agf; + int agf_ok; + + agf = XFS_BUF_TO_AGF(bp); + + agf_ok = agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) && + XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) && + be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) && + be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) && + be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) && + be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp); + + /* + * during growfs operations, the perag is not fully initialised, + * so we can't use it for any useful checking. growfs ensures we can't + * use it by using uncached buffers that don't have the perag attached + * so we can detect and avoid this problem. + */ + if (bp->b_pag) + agf_ok = agf_ok && be32_to_cpu(agf->agf_seqno) == + bp->b_pag->pag_agno; + + if (xfs_sb_version_haslazysbcount(&mp->m_sb)) + agf_ok = agf_ok && be32_to_cpu(agf->agf_btreeblks) <= + be32_to_cpu(agf->agf_length); + + if (unlikely(XFS_TEST_ERROR(!agf_ok, mp, XFS_ERRTAG_ALLOC_READ_AGF, + XFS_RANDOM_ALLOC_READ_AGF))) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agf); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +static void +xfs_agf_read_verify( + struct xfs_buf *bp) +{ + xfs_agf_verify(bp); +} + +static void +xfs_agf_write_verify( + struct xfs_buf *bp) +{ + xfs_agf_verify(bp); +} + +const struct xfs_buf_ops xfs_agf_buf_ops = { + .verify_read = xfs_agf_read_verify, + .verify_write = xfs_agf_write_verify, +}; + /* * Read in the allocation group header (free/alloc section). */ @@ -2101,44 +2213,19 @@ xfs_read_agf( int flags, /* XFS_BUF_ */ struct xfs_buf **bpp) /* buffer for the ag freelist header */ { - struct xfs_agf *agf; /* ag freelist header */ - int agf_ok; /* set if agf is consistent */ int error; ASSERT(agno != NULLAGNUMBER); error = xfs_trans_read_buf( mp, tp, mp->m_ddev_targp, XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), flags, bpp); + XFS_FSS_TO_BB(mp, 1), flags, bpp, &xfs_agf_buf_ops); if (error) return error; if (!*bpp) return 0; ASSERT(!(*bpp)->b_error); - agf = XFS_BUF_TO_AGF(*bpp); - - /* - * Validate the magic number of the agf block. - */ - agf_ok = - agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) && - XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) && - be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) && - be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) && - be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) && - be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp) && - be32_to_cpu(agf->agf_seqno) == agno; - if (xfs_sb_version_haslazysbcount(&mp->m_sb)) - agf_ok = agf_ok && be32_to_cpu(agf->agf_btreeblks) <= - be32_to_cpu(agf->agf_length); - if (unlikely(XFS_TEST_ERROR(!agf_ok, mp, XFS_ERRTAG_ALLOC_READ_AGF, - XFS_RANDOM_ALLOC_READ_AGF))) { - XFS_CORRUPTION_ERROR("xfs_alloc_read_agf", - XFS_ERRLEVEL_LOW, mp, agf); - xfs_trans_brelse(tp, *bpp); - return XFS_ERROR(EFSCORRUPTED); - } xfs_buf_set_ref(*bpp, XFS_AGF_REF); return 0; } @@ -2207,7 +2294,7 @@ xfs_alloc_read_agf( * group or loop over the allocation groups to find the result. */ int /* error */ -__xfs_alloc_vextent( +xfs_alloc_vextent( xfs_alloc_arg_t *args) /* allocation argument structure */ { xfs_agblock_t agsize; /* allocation group size */ @@ -2417,46 +2504,6 @@ error0: return error; } -static void -xfs_alloc_vextent_worker( - struct work_struct *work) -{ - struct xfs_alloc_arg *args = container_of(work, - struct xfs_alloc_arg, work); - unsigned long pflags; - - /* we are in a transaction context here */ - current_set_flags_nested(&pflags, PF_FSTRANS); - - args->result = __xfs_alloc_vextent(args); - complete(args->done); - - current_restore_flags_nested(&pflags, PF_FSTRANS); -} - -/* - * Data allocation requests often come in with little stack to work on. Push - * them off to a worker thread so there is lots of stack to use. Metadata - * requests, OTOH, are generally from low stack usage paths, so avoid the - * context switch overhead here. - */ -int -xfs_alloc_vextent( - struct xfs_alloc_arg *args) -{ - DECLARE_COMPLETION_ONSTACK(done); - - if (!args->userdata) - return __xfs_alloc_vextent(args); - - - args->done = &done; - INIT_WORK_ONSTACK(&args->work, xfs_alloc_vextent_worker); - queue_work(xfs_alloc_wq, &args->work); - wait_for_completion(&done); - return args->result; -} - /* * Free an extent. * Just break up the extent address and hand off to xfs_free_ag_extent diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/xfs_alloc.h index 93be4a667ca..99d0a610155 100644 --- a/fs/xfs/xfs_alloc.h +++ b/fs/xfs/xfs_alloc.h @@ -120,9 +120,6 @@ typedef struct xfs_alloc_arg { char isfl; /* set if is freelist blocks - !acctg */ char userdata; /* set if this is user data */ xfs_fsblock_t firstblock; /* io first block allocated */ - struct completion *done; - struct work_struct work; - int result; } xfs_alloc_arg_t; /* @@ -234,4 +231,7 @@ xfs_alloc_get_rec( xfs_extlen_t *len, /* output: length of extent */ int *stat); /* output: success/failure */ +extern const struct xfs_buf_ops xfs_agf_buf_ops; +extern const struct xfs_buf_ops xfs_agfl_buf_ops; + #endif /* __XFS_ALLOC_H__ */ diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index f1647caace8..b1ddef6b268 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -121,6 +121,8 @@ xfs_allocbt_free_block( xfs_extent_busy_insert(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1, XFS_EXTENT_BUSY_SKIP_DISCARD); xfs_trans_agbtree_delta(cur->bc_tp, -1); + + xfs_trans_binval(cur->bc_tp, bp); return 0; } @@ -270,6 +272,82 @@ xfs_allocbt_key_diff( return (__int64_t)be32_to_cpu(kp->ar_startblock) - rec->ar_startblock; } +static void +xfs_allocbt_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); + struct xfs_perag *pag = bp->b_pag; + unsigned int level; + int sblock_ok; /* block passes checks */ + + /* + * magic number and level verification + * + * During growfs operations, we can't verify the exact level as the + * perag is not fully initialised and hence not attached to the buffer. + * In this case, check against the maximum tree depth. + */ + level = be16_to_cpu(block->bb_level); + switch (block->bb_magic) { + case cpu_to_be32(XFS_ABTB_MAGIC): + if (pag) + sblock_ok = level < pag->pagf_levels[XFS_BTNUM_BNOi]; + else + sblock_ok = level < mp->m_ag_maxlevels; + break; + case cpu_to_be32(XFS_ABTC_MAGIC): + if (pag) + sblock_ok = level < pag->pagf_levels[XFS_BTNUM_CNTi]; + else + sblock_ok = level < mp->m_ag_maxlevels; + break; + default: + sblock_ok = 0; + break; + } + + /* numrecs verification */ + sblock_ok = sblock_ok && + be16_to_cpu(block->bb_numrecs) <= mp->m_alloc_mxr[level != 0]; + + /* sibling pointer verification */ + sblock_ok = sblock_ok && + (block->bb_u.s.bb_leftsib == cpu_to_be32(NULLAGBLOCK) || + be32_to_cpu(block->bb_u.s.bb_leftsib) < mp->m_sb.sb_agblocks) && + block->bb_u.s.bb_leftsib && + (block->bb_u.s.bb_rightsib == cpu_to_be32(NULLAGBLOCK) || + be32_to_cpu(block->bb_u.s.bb_rightsib) < mp->m_sb.sb_agblocks) && + block->bb_u.s.bb_rightsib; + + if (!sblock_ok) { + trace_xfs_btree_corrupt(bp, _RET_IP_); + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, block); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +static void +xfs_allocbt_read_verify( + struct xfs_buf *bp) +{ + xfs_allocbt_verify(bp); +} + +static void +xfs_allocbt_write_verify( + struct xfs_buf *bp) +{ + xfs_allocbt_verify(bp); +} + +const struct xfs_buf_ops xfs_allocbt_buf_ops = { + .verify_read = xfs_allocbt_read_verify, + .verify_write = xfs_allocbt_write_verify, +}; + + #ifdef DEBUG STATIC int xfs_allocbt_keys_inorder( @@ -325,6 +403,7 @@ static const struct xfs_btree_ops xfs_allocbt_ops = { .init_rec_from_cur = xfs_allocbt_init_rec_from_cur, .init_ptr_from_cur = xfs_allocbt_init_ptr_from_cur, .key_diff = xfs_allocbt_key_diff, + .buf_ops = &xfs_allocbt_buf_ops, #ifdef DEBUG .keys_inorder = xfs_allocbt_keys_inorder, .recs_inorder = xfs_allocbt_recs_inorder, diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h index 359fb86ed87..7e89a2b429d 100644 --- a/fs/xfs/xfs_alloc_btree.h +++ b/fs/xfs/xfs_alloc_btree.h @@ -93,4 +93,6 @@ extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *, xfs_agnumber_t, xfs_btnum_t); extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int); +extern const struct xfs_buf_ops xfs_allocbt_buf_ops; + #endif /* __XFS_ALLOC_BTREE_H__ */ diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index e562dd43f41..4111a40ebe1 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -124,7 +124,7 @@ xfs_setfilesize_trans_alloc( ioend->io_append_trans = tp; /* - * We will pass freeze protection with a transaction. So tell lockdep + * We may pass freeze protection with a transaction. So tell lockdep * we released it. */ rwsem_release(&ioend->io_inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1], @@ -149,11 +149,13 @@ xfs_setfilesize( xfs_fsize_t isize; /* - * The transaction was allocated in the I/O submission thread, - * thus we need to mark ourselves as beeing in a transaction - * manually. + * The transaction may have been allocated in the I/O submission thread, + * thus we need to mark ourselves as beeing in a transaction manually. + * Similarly for freeze protection. */ current_set_flags_nested(&tp->t_pflags, PF_FSTRANS); + rwsem_acquire_read(&VFS_I(ip)->i_sb->s_writers.lock_map[SB_FREEZE_FS-1], + 0, 1, _THIS_IP_); xfs_ilock(ip, XFS_ILOCK_EXCL); isize = xfs_new_eof(ip, ioend->io_offset + ioend->io_size); @@ -187,7 +189,8 @@ xfs_finish_ioend( if (ioend->io_type == XFS_IO_UNWRITTEN) queue_work(mp->m_unwritten_workqueue, &ioend->io_work); - else if (ioend->io_append_trans) + else if (ioend->io_append_trans || + (ioend->io_isdirect && xfs_ioend_is_append(ioend))) queue_work(mp->m_data_workqueue, &ioend->io_work); else xfs_destroy_ioend(ioend); @@ -205,15 +208,6 @@ xfs_end_io( struct xfs_inode *ip = XFS_I(ioend->io_inode); int error = 0; - if (ioend->io_append_trans) { - /* - * We've got freeze protection passed with the transaction. - * Tell lockdep about it. - */ - rwsem_acquire_read( - &ioend->io_inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1], - 0, 1, _THIS_IP_); - } if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { ioend->io_error = -EIO; goto done; @@ -226,35 +220,31 @@ xfs_end_io( * range to normal written extens after the data I/O has finished. */ if (ioend->io_type == XFS_IO_UNWRITTEN) { + error = xfs_iomap_write_unwritten(ip, ioend->io_offset, + ioend->io_size); + } else if (ioend->io_isdirect && xfs_ioend_is_append(ioend)) { /* - * For buffered I/O we never preallocate a transaction when - * doing the unwritten extent conversion, but for direct I/O - * we do not know if we are converting an unwritten extent - * or not at the point where we preallocate the transaction. + * For direct I/O we do not know if we need to allocate blocks + * or not so we can't preallocate an append transaction as that + * results in nested reservations and log space deadlocks. Hence + * allocate the transaction here. While this is sub-optimal and + * can block IO completion for some time, we're stuck with doing + * it this way until we can pass the ioend to the direct IO + * allocation callbacks and avoid nesting that way. */ - if (ioend->io_append_trans) { - ASSERT(ioend->io_isdirect); - - current_set_flags_nested( - &ioend->io_append_trans->t_pflags, PF_FSTRANS); - xfs_trans_cancel(ioend->io_append_trans, 0); - } - - error = xfs_iomap_write_unwritten(ip, ioend->io_offset, - ioend->io_size); - if (error) { - ioend->io_error = -error; + error = xfs_setfilesize_trans_alloc(ioend); + if (error) goto done; - } + error = xfs_setfilesize(ioend); } else if (ioend->io_append_trans) { error = xfs_setfilesize(ioend); - if (error) - ioend->io_error = -error; } else { ASSERT(!xfs_ioend_is_append(ioend)); } done: + if (error) + ioend->io_error = -error; xfs_destroy_ioend(ioend); } @@ -481,11 +471,17 @@ static inline int bio_add_buffer(struct bio *bio, struct buffer_head *bh) * * The fix is two passes across the ioend list - one to start writeback on the * buffer_heads, and then submit them for I/O on the second pass. + * + * If @fail is non-zero, it means that we have a situation where some part of + * the submission process has failed after we have marked paged for writeback + * and unlocked them. In this situation, we need to fail the ioend chain rather + * than submit it to IO. This typically only happens on a filesystem shutdown. */ STATIC void xfs_submit_ioend( struct writeback_control *wbc, - xfs_ioend_t *ioend) + xfs_ioend_t *ioend, + int fail) { xfs_ioend_t *head = ioend; xfs_ioend_t *next; @@ -506,6 +502,18 @@ xfs_submit_ioend( next = ioend->io_list; bio = NULL; + /* + * If we are failing the IO now, just mark the ioend with an + * error and finish it. This will run IO completion immediately + * as there is only one reference to the ioend at this point in + * time. + */ + if (fail) { + ioend->io_error = -fail; + xfs_finish_ioend(ioend); + continue; + } + for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { if (!bio) { @@ -1060,7 +1068,18 @@ xfs_vm_writepage( xfs_start_page_writeback(page, 1, count); - if (ioend && imap_valid) { + /* if there is no IO to be submitted for this page, we are done */ + if (!ioend) + return 0; + + ASSERT(iohead); + + /* + * Any errors from this point onwards need tobe reported through the IO + * completion path as we have marked the initial page as under writeback + * and unlocked it. + */ + if (imap_valid) { xfs_off_t end_index; end_index = imap.br_startoff + imap.br_blockcount; @@ -1079,20 +1098,15 @@ xfs_vm_writepage( wbc, end_index); } - if (iohead) { - /* - * Reserve log space if we might write beyond the on-disk - * inode size. - */ - if (ioend->io_type != XFS_IO_UNWRITTEN && - xfs_ioend_is_append(ioend)) { - err = xfs_setfilesize_trans_alloc(ioend); - if (err) - goto error; - } - xfs_submit_ioend(wbc, iohead); - } + /* + * Reserve log space if we might write beyond the on-disk inode size. + */ + err = 0; + if (ioend->io_type != XFS_IO_UNWRITTEN && xfs_ioend_is_append(ioend)) + err = xfs_setfilesize_trans_alloc(ioend); + + xfs_submit_ioend(wbc, iohead, err); return 0; @@ -1408,25 +1422,21 @@ xfs_vm_direct_IO( size_t size = iov_length(iov, nr_segs); /* - * We need to preallocate a transaction for a size update - * here. In the case that this write both updates the size - * and converts at least on unwritten extent we will cancel - * the still clean transaction after the I/O has finished. + * We cannot preallocate a size update transaction here as we + * don't know whether allocation is necessary or not. Hence we + * can only tell IO completion that one is necessary if we are + * not doing unwritten extent conversion. */ iocb->private = ioend = xfs_alloc_ioend(inode, XFS_IO_DIRECT); - if (offset + size > XFS_I(inode)->i_d.di_size) { - ret = xfs_setfilesize_trans_alloc(ioend); - if (ret) - goto out_destroy_ioend; + if (offset + size > XFS_I(inode)->i_d.di_size) ioend->io_isdirect = 1; - } ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset, nr_segs, xfs_get_blocks_direct, xfs_end_io_direct_write, NULL, 0); if (ret != -EIOCBQUEUED && iocb->private) - goto out_trans_cancel; + goto out_destroy_ioend; } else { ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset, nr_segs, @@ -1436,15 +1446,6 @@ xfs_vm_direct_IO( return ret; -out_trans_cancel: - if (ioend->io_append_trans) { - current_set_flags_nested(&ioend->io_append_trans->t_pflags, - PF_FSTRANS); - rwsem_acquire_read( - &inode->i_sb->s_writers.lock_map[SB_FREEZE_FS-1], - 0, 1, _THIS_IP_); - xfs_trans_cancel(ioend->io_append_trans, 0); - } out_destroy_ioend: xfs_destroy_ioend(ioend); return ret; @@ -1617,7 +1618,7 @@ xfs_vm_bmap( trace_xfs_vm_bmap(XFS_I(inode)); xfs_ilock(ip, XFS_IOLOCK_SHARED); - xfs_flush_pages(ip, (xfs_off_t)0, -1, 0, FI_REMAPF); + filemap_write_and_wait(mapping); xfs_iunlock(ip, XFS_IOLOCK_SHARED); return generic_block_bmap(mapping, block, xfs_get_blocks); } diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c index 0ca1f0be62d..aaf472532b3 100644 --- a/fs/xfs/xfs_attr.c +++ b/fs/xfs/xfs_attr.c @@ -903,11 +903,9 @@ xfs_attr_leaf_addname(xfs_da_args_t *args) */ dp = args->dp; args->blkno = 0; - error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, - XFS_ATTR_FORK); + error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); if (error) - return(error); - ASSERT(bp != NULL); + return error; /* * Look up the given attribute in the leaf block. Figure out if @@ -1031,12 +1029,12 @@ xfs_attr_leaf_addname(xfs_da_args_t *args) * Read in the block containing the "old" attr, then * remove the "old" attr from that block (neat, huh!) */ - error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, - &bp, XFS_ATTR_FORK); + error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, + -1, &bp); if (error) - return(error); - ASSERT(bp != NULL); - (void)xfs_attr_leaf_remove(bp, args); + return error; + + xfs_attr_leaf_remove(bp, args); /* * If the result is small enough, shrink it all into the inode. @@ -1100,20 +1098,17 @@ xfs_attr_leaf_removename(xfs_da_args_t *args) */ dp = args->dp; args->blkno = 0; - error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, - XFS_ATTR_FORK); - if (error) { - return(error); - } + error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); + if (error) + return error; - ASSERT(bp != NULL); error = xfs_attr_leaf_lookup_int(bp, args); if (error == ENOATTR) { xfs_trans_brelse(args->trans, bp); return(error); } - (void)xfs_attr_leaf_remove(bp, args); + xfs_attr_leaf_remove(bp, args); /* * If the result is small enough, shrink it all into the inode. @@ -1155,12 +1150,12 @@ xfs_attr_leaf_get(xfs_da_args_t *args) struct xfs_buf *bp; int error; + trace_xfs_attr_leaf_get(args); + args->blkno = 0; - error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, - XFS_ATTR_FORK); + error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); if (error) - return(error); - ASSERT(bp != NULL); + return error; error = xfs_attr_leaf_lookup_int(bp, args); if (error != EEXIST) { @@ -1181,22 +1176,15 @@ xfs_attr_leaf_get(xfs_da_args_t *args) STATIC int xfs_attr_leaf_list(xfs_attr_list_context_t *context) { - xfs_attr_leafblock_t *leaf; int error; struct xfs_buf *bp; + trace_xfs_attr_leaf_list(context); + context->cursor->blkno = 0; - error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK); + error = xfs_attr_leaf_read(NULL, context->dp, 0, -1, &bp); if (error) return XFS_ERROR(error); - ASSERT(bp != NULL); - leaf = bp->b_addr; - if (unlikely(leaf->hdr.info.magic != cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) { - XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW, - context->dp->i_mount, leaf); - xfs_trans_brelse(NULL, bp); - return XFS_ERROR(EFSCORRUPTED); - } error = xfs_attr_leaf_list_int(bp, context); xfs_trans_brelse(NULL, bp); @@ -1600,12 +1588,9 @@ xfs_attr_node_removename(xfs_da_args_t *args) ASSERT(state->path.blk[0].bp); state->path.blk[0].bp = NULL; - error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, - XFS_ATTR_FORK); + error = xfs_attr_leaf_read(args->trans, args->dp, 0, -1, &bp); if (error) goto out; - ASSERT((((xfs_attr_leafblock_t *)bp->b_addr)->hdr.info.magic) == - cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { xfs_bmap_init(args->flist, args->firstblock); @@ -1653,6 +1638,8 @@ xfs_attr_fillstate(xfs_da_state_t *state) xfs_da_state_blk_t *blk; int level; + trace_xfs_attr_fillstate(state->args); + /* * Roll down the "path" in the state structure, storing the on-disk * block number for those buffers in the "path". @@ -1699,6 +1686,8 @@ xfs_attr_refillstate(xfs_da_state_t *state) xfs_da_state_blk_t *blk; int level, error; + trace_xfs_attr_refillstate(state->args); + /* * Roll down the "path" in the state structure, storing the on-disk * block number for those buffers in the "path". @@ -1707,7 +1696,7 @@ xfs_attr_refillstate(xfs_da_state_t *state) ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); for (blk = path->blk, level = 0; level < path->active; blk++, level++) { if (blk->disk_blkno) { - error = xfs_da_read_buf(state->args->trans, + error = xfs_da_node_read(state->args->trans, state->args->dp, blk->blkno, blk->disk_blkno, &blk->bp, XFS_ATTR_FORK); @@ -1726,7 +1715,7 @@ xfs_attr_refillstate(xfs_da_state_t *state) ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); for (blk = path->blk, level = 0; level < path->active; blk++, level++) { if (blk->disk_blkno) { - error = xfs_da_read_buf(state->args->trans, + error = xfs_da_node_read(state->args->trans, state->args->dp, blk->blkno, blk->disk_blkno, &blk->bp, XFS_ATTR_FORK); @@ -1755,6 +1744,8 @@ xfs_attr_node_get(xfs_da_args_t *args) int error, retval; int i; + trace_xfs_attr_node_get(args); + state = xfs_da_state_alloc(); state->args = args; state->mp = args->dp->i_mount; @@ -1804,6 +1795,8 @@ xfs_attr_node_list(xfs_attr_list_context_t *context) int error, i; struct xfs_buf *bp; + trace_xfs_attr_node_list(context); + cursor = context->cursor; cursor->initted = 1; @@ -1814,7 +1807,7 @@ xfs_attr_node_list(xfs_attr_list_context_t *context) */ bp = NULL; if (cursor->blkno > 0) { - error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, + error = xfs_da_node_read(NULL, context->dp, cursor->blkno, -1, &bp, XFS_ATTR_FORK); if ((error != 0) && (error != EFSCORRUPTED)) return(error); @@ -1856,17 +1849,11 @@ xfs_attr_node_list(xfs_attr_list_context_t *context) if (bp == NULL) { cursor->blkno = 0; for (;;) { - error = xfs_da_read_buf(NULL, context->dp, + error = xfs_da_node_read(NULL, context->dp, cursor->blkno, -1, &bp, XFS_ATTR_FORK); if (error) return(error); - if (unlikely(bp == NULL)) { - XFS_ERROR_REPORT("xfs_attr_node_list(2)", - XFS_ERRLEVEL_LOW, - context->dp->i_mount); - return(XFS_ERROR(EFSCORRUPTED)); - } node = bp->b_addr; if (node->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) @@ -1907,14 +1894,6 @@ xfs_attr_node_list(xfs_attr_list_context_t *context) */ for (;;) { leaf = bp->b_addr; - if (unlikely(leaf->hdr.info.magic != - cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) { - XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)", - XFS_ERRLEVEL_LOW, - context->dp->i_mount, leaf); - xfs_trans_brelse(NULL, bp); - return(XFS_ERROR(EFSCORRUPTED)); - } error = xfs_attr_leaf_list_int(bp, context); if (error) { xfs_trans_brelse(NULL, bp); @@ -1924,16 +1903,10 @@ xfs_attr_node_list(xfs_attr_list_context_t *context) break; cursor->blkno = be32_to_cpu(leaf->hdr.info.forw); xfs_trans_brelse(NULL, bp); - error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, - &bp, XFS_ATTR_FORK); + error = xfs_attr_leaf_read(NULL, context->dp, cursor->blkno, -1, + &bp); if (error) - return(error); - if (unlikely((bp == NULL))) { - XFS_ERROR_REPORT("xfs_attr_node_list(5)", - XFS_ERRLEVEL_LOW, - context->dp->i_mount); - return(XFS_ERROR(EFSCORRUPTED)); - } + return error; } xfs_trans_brelse(NULL, bp); return(0); @@ -1959,6 +1932,8 @@ xfs_attr_rmtval_get(xfs_da_args_t *args) int nmap, error, tmp, valuelen, blkcnt, i; xfs_dablk_t lblkno; + trace_xfs_attr_rmtval_get(args); + ASSERT(!(args->flags & ATTR_KERNOVAL)); mp = args->dp->i_mount; @@ -1980,7 +1955,7 @@ xfs_attr_rmtval_get(xfs_da_args_t *args) dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, - dblkno, blkcnt, 0, &bp); + dblkno, blkcnt, 0, &bp, NULL); if (error) return(error); @@ -2014,6 +1989,8 @@ xfs_attr_rmtval_set(xfs_da_args_t *args) xfs_dablk_t lblkno; int blkcnt, valuelen, nmap, error, tmp, committed; + trace_xfs_attr_rmtval_set(args); + dp = args->dp; mp = dp->i_mount; src = args->value; @@ -2143,6 +2120,8 @@ xfs_attr_rmtval_remove(xfs_da_args_t *args) xfs_dablk_t lblkno; int valuelen, blkcnt, nmap, error, done, committed; + trace_xfs_attr_rmtval_remove(args); + mp = args->dp->i_mount; /* diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c index d330111ca73..ee24993c7d1 100644 --- a/fs/xfs/xfs_attr_leaf.c +++ b/fs/xfs/xfs_attr_leaf.c @@ -57,7 +57,8 @@ STATIC int xfs_attr_leaf_create(xfs_da_args_t *args, xfs_dablk_t which_block, struct xfs_buf **bpp); STATIC int xfs_attr_leaf_add_work(struct xfs_buf *leaf_buffer, xfs_da_args_t *args, int freemap_index); -STATIC void xfs_attr_leaf_compact(xfs_trans_t *tp, struct xfs_buf *leaf_buffer); +STATIC void xfs_attr_leaf_compact(struct xfs_da_args *args, + struct xfs_buf *leaf_buffer); STATIC void xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, xfs_da_state_blk_t *blk2); @@ -87,6 +88,52 @@ STATIC void xfs_attr_leaf_moveents(xfs_attr_leafblock_t *src_leaf, xfs_mount_t *mp); STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index); +static void +xfs_attr_leaf_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_attr_leaf_hdr *hdr = bp->b_addr; + int block_ok = 0; + + block_ok = hdr->info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC); + if (!block_ok) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +static void +xfs_attr_leaf_read_verify( + struct xfs_buf *bp) +{ + xfs_attr_leaf_verify(bp); +} + +static void +xfs_attr_leaf_write_verify( + struct xfs_buf *bp) +{ + xfs_attr_leaf_verify(bp); +} + +const struct xfs_buf_ops xfs_attr_leaf_buf_ops = { + .verify_read = xfs_attr_leaf_read_verify, + .verify_write = xfs_attr_leaf_write_verify, +}; + +int +xfs_attr_leaf_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t bno, + xfs_daddr_t mappedbno, + struct xfs_buf **bpp) +{ + return xfs_da_read_buf(tp, dp, bno, mappedbno, bpp, + XFS_ATTR_FORK, &xfs_attr_leaf_buf_ops); +} + /*======================================================================== * Namespace helper routines *========================================================================*/ @@ -869,17 +916,16 @@ xfs_attr_leaf_to_node(xfs_da_args_t *args) error = xfs_da_grow_inode(args, &blkno); if (error) goto out; - error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp1, - XFS_ATTR_FORK); + error = xfs_attr_leaf_read(args->trans, args->dp, 0, -1, &bp1); if (error) goto out; - ASSERT(bp1 != NULL); + bp2 = NULL; error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp2, XFS_ATTR_FORK); if (error) goto out; - ASSERT(bp2 != NULL); + bp2->b_ops = bp1->b_ops; memcpy(bp2->b_addr, bp1->b_addr, XFS_LBSIZE(dp->i_mount)); bp1 = NULL; xfs_trans_log_buf(args->trans, bp2, 0, XFS_LBSIZE(dp->i_mount) - 1); @@ -933,7 +979,7 @@ xfs_attr_leaf_create( XFS_ATTR_FORK); if (error) return(error); - ASSERT(bp != NULL); + bp->b_ops = &xfs_attr_leaf_buf_ops; leaf = bp->b_addr; memset((char *)leaf, 0, XFS_LBSIZE(dp->i_mount)); hdr = &leaf->hdr; @@ -1071,7 +1117,7 @@ xfs_attr_leaf_add( * Compact the entries to coalesce free space. * This may change the hdr->count via dropping INCOMPLETE entries. */ - xfs_attr_leaf_compact(args->trans, bp); + xfs_attr_leaf_compact(args, bp); /* * After compaction, the block is guaranteed to have only one @@ -1102,6 +1148,8 @@ xfs_attr_leaf_add_work( xfs_mount_t *mp; int tmp, i; + trace_xfs_attr_leaf_add_work(args); + leaf = bp->b_addr; ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); hdr = &leaf->hdr; @@ -1214,15 +1262,17 @@ xfs_attr_leaf_add_work( */ STATIC void xfs_attr_leaf_compact( - struct xfs_trans *trans, - struct xfs_buf *bp) + struct xfs_da_args *args, + struct xfs_buf *bp) { - xfs_attr_leafblock_t *leaf_s, *leaf_d; - xfs_attr_leaf_hdr_t *hdr_s, *hdr_d; - xfs_mount_t *mp; - char *tmpbuffer; + xfs_attr_leafblock_t *leaf_s, *leaf_d; + xfs_attr_leaf_hdr_t *hdr_s, *hdr_d; + struct xfs_trans *trans = args->trans; + struct xfs_mount *mp = trans->t_mountp; + char *tmpbuffer; + + trace_xfs_attr_leaf_compact(args); - mp = trans->t_mountp; tmpbuffer = kmem_alloc(XFS_LBSIZE(mp), KM_SLEEP); ASSERT(tmpbuffer != NULL); memcpy(tmpbuffer, bp->b_addr, XFS_LBSIZE(mp)); @@ -1291,6 +1341,7 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, leaf2 = blk2->bp->b_addr; ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); + ASSERT(leaf2->hdr.count == 0); args = state->args; trace_xfs_attr_leaf_rebalance(args); @@ -1344,9 +1395,8 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, max = be16_to_cpu(hdr2->firstused) - sizeof(xfs_attr_leaf_hdr_t); max -= be16_to_cpu(hdr2->count) * sizeof(xfs_attr_leaf_entry_t); - if (space > max) { - xfs_attr_leaf_compact(args->trans, blk2->bp); - } + if (space > max) + xfs_attr_leaf_compact(args, blk2->bp); /* * Move high entries from leaf1 to low end of leaf2. @@ -1361,6 +1411,7 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, * I assert that since all callers pass in an empty * second buffer, this code should never execute. */ + ASSERT(0); /* * Figure the total bytes to be added to the destination leaf. @@ -1376,9 +1427,8 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, max = be16_to_cpu(hdr1->firstused) - sizeof(xfs_attr_leaf_hdr_t); max -= be16_to_cpu(hdr1->count) * sizeof(xfs_attr_leaf_entry_t); - if (space > max) { - xfs_attr_leaf_compact(args->trans, blk1->bp); - } + if (space > max) + xfs_attr_leaf_compact(args, blk1->bp); /* * Move low entries from leaf2 to high end of leaf1. @@ -1422,10 +1472,24 @@ xfs_attr_leaf_rebalance(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, args->index2 = 0; args->blkno2 = blk2->blkno; } else { + /* + * On a double leaf split, the original attr location + * is already stored in blkno2/index2, so don't + * overwrite it overwise we corrupt the tree. + */ blk2->index = blk1->index - be16_to_cpu(leaf1->hdr.count); - args->index = args->index2 = blk2->index; - args->blkno = args->blkno2 = blk2->blkno; + args->index = blk2->index; + args->blkno = blk2->blkno; + if (!state->extravalid) { + /* + * set the new attr location to match the old + * one and let the higher level split code + * decide where in the leaf to place it. + */ + args->index2 = blk2->index; + args->blkno2 = blk2->blkno; + } } } else { ASSERT(state->inleaf == 1); @@ -1561,6 +1625,8 @@ xfs_attr_leaf_toosmall(xfs_da_state_t *state, int *action) xfs_dablk_t blkno; struct xfs_buf *bp; + trace_xfs_attr_leaf_toosmall(state->args); + /* * Check for the degenerate case of the block being over 50% full. * If so, it's not worth even looking to see if we might be able @@ -1620,18 +1686,16 @@ xfs_attr_leaf_toosmall(xfs_da_state_t *state, int *action) blkno = be32_to_cpu(info->back); if (blkno == 0) continue; - error = xfs_da_read_buf(state->args->trans, state->args->dp, - blkno, -1, &bp, XFS_ATTR_FORK); + error = xfs_attr_leaf_read(state->args->trans, state->args->dp, + blkno, -1, &bp); if (error) return(error); - ASSERT(bp != NULL); leaf = (xfs_attr_leafblock_t *)info; count = be16_to_cpu(leaf->hdr.count); bytes = state->blocksize - (state->blocksize>>2); bytes -= be16_to_cpu(leaf->hdr.usedbytes); leaf = bp->b_addr; - ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); count += be16_to_cpu(leaf->hdr.count); bytes -= be16_to_cpu(leaf->hdr.usedbytes); bytes -= count * sizeof(xfs_attr_leaf_entry_t); @@ -1686,6 +1750,8 @@ xfs_attr_leaf_remove( int tablesize, tmp, i; xfs_mount_t *mp; + trace_xfs_attr_leaf_remove(args); + leaf = bp->b_addr; ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); hdr = &leaf->hdr; @@ -2495,15 +2561,11 @@ xfs_attr_leaf_clearflag(xfs_da_args_t *args) /* * Set up the operation. */ - error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, - XFS_ATTR_FORK); - if (error) { + error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); + if (error) return(error); - } - ASSERT(bp != NULL); leaf = bp->b_addr; - ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); ASSERT(args->index < be16_to_cpu(leaf->hdr.count)); ASSERT(args->index >= 0); entry = &leaf->entries[ args->index ]; @@ -2560,15 +2622,11 @@ xfs_attr_leaf_setflag(xfs_da_args_t *args) /* * Set up the operation. */ - error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, - XFS_ATTR_FORK); - if (error) { + error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); + if (error) return(error); - } - ASSERT(bp != NULL); leaf = bp->b_addr; - ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); ASSERT(args->index < be16_to_cpu(leaf->hdr.count)); ASSERT(args->index >= 0); entry = &leaf->entries[ args->index ]; @@ -2617,35 +2675,28 @@ xfs_attr_leaf_flipflags(xfs_da_args_t *args) /* * Read the block containing the "old" attr */ - error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp1, - XFS_ATTR_FORK); - if (error) { - return(error); - } - ASSERT(bp1 != NULL); + error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno, -1, &bp1); + if (error) + return error; /* * Read the block containing the "new" attr, if it is different */ if (args->blkno2 != args->blkno) { - error = xfs_da_read_buf(args->trans, args->dp, args->blkno2, - -1, &bp2, XFS_ATTR_FORK); - if (error) { - return(error); - } - ASSERT(bp2 != NULL); + error = xfs_attr_leaf_read(args->trans, args->dp, args->blkno2, + -1, &bp2); + if (error) + return error; } else { bp2 = bp1; } leaf1 = bp1->b_addr; - ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); ASSERT(args->index < be16_to_cpu(leaf1->hdr.count)); ASSERT(args->index >= 0); entry1 = &leaf1->entries[ args->index ]; leaf2 = bp2->b_addr; - ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); ASSERT(args->index2 < be16_to_cpu(leaf2->hdr.count)); ASSERT(args->index2 >= 0); entry2 = &leaf2->entries[ args->index2 ]; @@ -2730,7 +2781,7 @@ xfs_attr_root_inactive(xfs_trans_t **trans, xfs_inode_t *dp) * the extents in reverse order the extent containing * block 0 must still be there. */ - error = xfs_da_read_buf(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK); + error = xfs_da_node_read(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK); if (error) return(error); blkno = XFS_BUF_ADDR(bp); @@ -2815,7 +2866,7 @@ xfs_attr_node_inactive( * traversal of the tree so we may deal with many blocks * before we come back to this one. */ - error = xfs_da_read_buf(*trans, dp, child_fsb, -2, &child_bp, + error = xfs_da_node_read(*trans, dp, child_fsb, -2, &child_bp, XFS_ATTR_FORK); if (error) return(error); @@ -2856,8 +2907,8 @@ xfs_attr_node_inactive( * child block number. */ if ((i+1) < count) { - error = xfs_da_read_buf(*trans, dp, 0, parent_blkno, - &bp, XFS_ATTR_FORK); + error = xfs_da_node_read(*trans, dp, 0, parent_blkno, + &bp, XFS_ATTR_FORK); if (error) return(error); child_fsb = be32_to_cpu(node->btree[i+1].before); diff --git a/fs/xfs/xfs_attr_leaf.h b/fs/xfs/xfs_attr_leaf.h index dea17722945..77de139a58f 100644 --- a/fs/xfs/xfs_attr_leaf.h +++ b/fs/xfs/xfs_attr_leaf.h @@ -261,4 +261,10 @@ int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp, struct xfs_buf *leaf2_bp); int xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize, int *local); +int xfs_attr_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp, + xfs_dablk_t bno, xfs_daddr_t mappedbno, + struct xfs_buf **bpp); + +extern const struct xfs_buf_ops xfs_attr_leaf_buf_ops; + #endif /* __XFS_ATTR_LEAF_H__ */ diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 848ffa77707..0e92d12765d 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -2437,6 +2437,7 @@ xfs_bmap_btalloc( * Normal allocation, done through xfs_alloc_vextent. */ tryagain = isaligned = 0; + memset(&args, 0, sizeof(args)); args.tp = ap->tp; args.mp = mp; args.fsbno = ap->blkno; @@ -2661,8 +2662,9 @@ xfs_bmap_btree_to_extents( if ((error = xfs_btree_check_lptr(cur, cbno, 1))) return error; #endif - if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, - XFS_BMAP_BTREE_REF))) + error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF, + &xfs_bmbt_buf_ops); + if (error) return error; cblock = XFS_BUF_TO_BLOCK(cbp); if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) @@ -3082,6 +3084,7 @@ xfs_bmap_extents_to_btree( * Convert to a btree with two levels, one record in root. */ XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); + memset(&args, 0, sizeof(args)); args.tp = tp; args.mp = mp; args.firstblock = *firstblock; @@ -3121,6 +3124,7 @@ xfs_bmap_extents_to_btree( /* * Fill in the child block. */ + abp->b_ops = &xfs_bmbt_buf_ops; ablock = XFS_BUF_TO_BLOCK(abp); ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); ablock->bb_level = 0; @@ -3237,6 +3241,7 @@ xfs_bmap_local_to_extents( xfs_buf_t *bp; /* buffer for extent block */ xfs_bmbt_rec_host_t *ep;/* extent record pointer */ + memset(&args, 0, sizeof(args)); args.tp = tp; args.mp = ip->i_mount; args.firstblock = *firstblock; @@ -3266,6 +3271,7 @@ xfs_bmap_local_to_extents( ASSERT(args.len == 1); *firstblock = args.fsbno; bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); + bp->b_ops = &xfs_bmbt_buf_ops; memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes); xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1); xfs_bmap_forkoff_reset(args.mp, ip, whichfork); @@ -4075,8 +4081,9 @@ xfs_bmap_read_extents( * pointer (leftmost) at each level. */ while (level-- > 0) { - if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, - XFS_BMAP_BTREE_REF))) + error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, + XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); + if (error) return error; block = XFS_BUF_TO_BLOCK(bp); XFS_WANT_CORRUPTED_GOTO( @@ -4121,7 +4128,8 @@ xfs_bmap_read_extents( */ nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); if (nextbno != NULLFSBLOCK) - xfs_btree_reada_bufl(mp, nextbno, 1); + xfs_btree_reada_bufl(mp, nextbno, 1, + &xfs_bmbt_buf_ops); /* * Copy records into the extent records. */ @@ -4153,8 +4161,9 @@ xfs_bmap_read_extents( */ if (bno == NULLFSBLOCK) break; - if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, - XFS_BMAP_BTREE_REF))) + error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, + XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); + if (error) return error; block = XFS_BUF_TO_BLOCK(bp); } @@ -4616,12 +4625,11 @@ xfs_bmapi_delay( STATIC int -xfs_bmapi_allocate( - struct xfs_bmalloca *bma, - int flags) +__xfs_bmapi_allocate( + struct xfs_bmalloca *bma) { struct xfs_mount *mp = bma->ip->i_mount; - int whichfork = (flags & XFS_BMAPI_ATTRFORK) ? + int whichfork = (bma->flags & XFS_BMAPI_ATTRFORK) ? XFS_ATTR_FORK : XFS_DATA_FORK; struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); int tmp_logflags = 0; @@ -4654,24 +4662,27 @@ xfs_bmapi_allocate( * Indicate if this is the first user data in the file, or just any * user data. */ - if (!(flags & XFS_BMAPI_METADATA)) { + if (!(bma->flags & XFS_BMAPI_METADATA)) { bma->userdata = (bma->offset == 0) ? XFS_ALLOC_INITIAL_USER_DATA : XFS_ALLOC_USERDATA; } - bma->minlen = (flags & XFS_BMAPI_CONTIG) ? bma->length : 1; + bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1; /* * Only want to do the alignment at the eof if it is userdata and * allocation length is larger than a stripe unit. */ if (mp->m_dalign && bma->length >= mp->m_dalign && - !(flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { + !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { error = xfs_bmap_isaeof(bma, whichfork); if (error) return error; } + if (bma->flags & XFS_BMAPI_STACK_SWITCH) + bma->stack_switch = 1; + error = xfs_bmap_alloc(bma); if (error) return error; @@ -4706,7 +4717,7 @@ xfs_bmapi_allocate( * A wasdelay extent has been initialized, so shouldn't be flagged * as unwritten. */ - if (!bma->wasdel && (flags & XFS_BMAPI_PREALLOC) && + if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) && xfs_sb_version_hasextflgbit(&mp->m_sb)) bma->got.br_state = XFS_EXT_UNWRITTEN; @@ -4734,6 +4745,45 @@ xfs_bmapi_allocate( return 0; } +static void +xfs_bmapi_allocate_worker( + struct work_struct *work) +{ + struct xfs_bmalloca *args = container_of(work, + struct xfs_bmalloca, work); + unsigned long pflags; + + /* we are in a transaction context here */ + current_set_flags_nested(&pflags, PF_FSTRANS); + + args->result = __xfs_bmapi_allocate(args); + complete(args->done); + + current_restore_flags_nested(&pflags, PF_FSTRANS); +} + +/* + * Some allocation requests often come in with little stack to work on. Push + * them off to a worker thread so there is lots of stack to use. Otherwise just + * call directly to avoid the context switch overhead here. + */ +int +xfs_bmapi_allocate( + struct xfs_bmalloca *args) +{ + DECLARE_COMPLETION_ONSTACK(done); + + if (!args->stack_switch) + return __xfs_bmapi_allocate(args); + + + args->done = &done; + INIT_WORK_ONSTACK(&args->work, xfs_bmapi_allocate_worker); + queue_work(xfs_alloc_wq, &args->work); + wait_for_completion(&done); + return args->result; +} + STATIC int xfs_bmapi_convert_unwritten( struct xfs_bmalloca *bma, @@ -4919,6 +4969,7 @@ xfs_bmapi_write( bma.conv = !!(flags & XFS_BMAPI_CONVERT); bma.wasdel = wasdelay; bma.offset = bno; + bma.flags = flags; /* * There's a 32/64 bit type mismatch between the @@ -4934,7 +4985,7 @@ xfs_bmapi_write( ASSERT(len > 0); ASSERT(bma.length > 0); - error = xfs_bmapi_allocate(&bma, flags); + error = xfs_bmapi_allocate(&bma); if (error) goto error0; if (bma.blkno == NULLFSBLOCK) @@ -5554,7 +5605,7 @@ xfs_getbmap( xfs_ilock(ip, XFS_IOLOCK_SHARED); if (whichfork == XFS_DATA_FORK && !(iflags & BMV_IF_DELALLOC)) { if (ip->i_delayed_blks || XFS_ISIZE(ip) > ip->i_d.di_size) { - error = xfs_flush_pages(ip, 0, -1, 0, FI_REMAPF); + error = -filemap_write_and_wait(VFS_I(ip)->i_mapping); if (error) goto out_unlock_iolock; } @@ -5823,15 +5874,16 @@ xfs_bmap_check_leaf_extents( */ while (level-- > 0) { /* See if buf is in cur first */ + bp_release = 0; bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); - if (bp) { - bp_release = 0; - } else { + if (!bp) { bp_release = 1; + error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, + XFS_BMAP_BTREE_REF, + &xfs_bmbt_buf_ops); + if (error) + goto error_norelse; } - if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, - XFS_BMAP_BTREE_REF))) - goto error_norelse; block = XFS_BUF_TO_BLOCK(bp); XFS_WANT_CORRUPTED_GOTO( xfs_bmap_sanity_check(mp, bp, level), @@ -5908,15 +5960,16 @@ xfs_bmap_check_leaf_extents( if (bno == NULLFSBLOCK) break; + bp_release = 0; bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); - if (bp) { - bp_release = 0; - } else { + if (!bp) { bp_release = 1; + error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, + XFS_BMAP_BTREE_REF, + &xfs_bmbt_buf_ops); + if (error) + goto error_norelse; } - if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, - XFS_BMAP_BTREE_REF))) - goto error_norelse; block = XFS_BUF_TO_BLOCK(bp); } if (bp_release) { @@ -6007,7 +6060,9 @@ xfs_bmap_count_tree( struct xfs_btree_block *block, *nextblock; int numrecs; - if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF))) + error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF, + &xfs_bmbt_buf_ops); + if (error) return error; *count += 1; block = XFS_BUF_TO_BLOCK(bp); @@ -6016,8 +6071,10 @@ xfs_bmap_count_tree( /* Not at node above leaves, count this level of nodes */ nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); while (nextbno != NULLFSBLOCK) { - if ((error = xfs_btree_read_bufl(mp, tp, nextbno, - 0, &nbp, XFS_BMAP_BTREE_REF))) + error = xfs_btree_read_bufl(mp, tp, nextbno, 0, &nbp, + XFS_BMAP_BTREE_REF, + &xfs_bmbt_buf_ops); + if (error) return error; *count += 1; nextblock = XFS_BUF_TO_BLOCK(nbp); @@ -6046,8 +6103,10 @@ xfs_bmap_count_tree( if (nextbno == NULLFSBLOCK) break; bno = nextbno; - if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, - XFS_BMAP_BTREE_REF))) + error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, + XFS_BMAP_BTREE_REF, + &xfs_bmbt_buf_ops); + if (error) return error; *count += 1; block = XFS_BUF_TO_BLOCK(bp); diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h index 803b56d7ce1..5f469c3516e 100644 --- a/fs/xfs/xfs_bmap.h +++ b/fs/xfs/xfs_bmap.h @@ -77,6 +77,7 @@ typedef struct xfs_bmap_free * from written to unwritten, otherwise convert from unwritten to written. */ #define XFS_BMAPI_CONVERT 0x040 +#define XFS_BMAPI_STACK_SWITCH 0x080 #define XFS_BMAPI_FLAGS \ { XFS_BMAPI_ENTIRE, "ENTIRE" }, \ @@ -85,7 +86,8 @@ typedef struct xfs_bmap_free { XFS_BMAPI_PREALLOC, "PREALLOC" }, \ { XFS_BMAPI_IGSTATE, "IGSTATE" }, \ { XFS_BMAPI_CONTIG, "CONTIG" }, \ - { XFS_BMAPI_CONVERT, "CONVERT" } + { XFS_BMAPI_CONVERT, "CONVERT" }, \ + { XFS_BMAPI_STACK_SWITCH, "STACK_SWITCH" } static inline int xfs_bmapi_aflag(int w) @@ -133,6 +135,11 @@ typedef struct xfs_bmalloca { char userdata;/* set if is user data */ char aeof; /* allocated space at eof */ char conv; /* overwriting unwritten extents */ + char stack_switch; + int flags; + struct completion *done; + struct work_struct work; + int result; } xfs_bmalloca_t; /* diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c index 862084a47a7..061b45cbe61 100644 --- a/fs/xfs/xfs_bmap_btree.c +++ b/fs/xfs/xfs_bmap_btree.c @@ -36,6 +36,7 @@ #include "xfs_bmap.h" #include "xfs_error.h" #include "xfs_quota.h" +#include "xfs_trace.h" /* * Determine the extent state. @@ -707,6 +708,67 @@ xfs_bmbt_key_diff( cur->bc_rec.b.br_startoff; } +static void +xfs_bmbt_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); + unsigned int level; + int lblock_ok; /* block passes checks */ + + /* magic number and level verification. + * + * We don't know waht fork we belong to, so just verify that the level + * is less than the maximum of the two. Later checks will be more + * precise. + */ + level = be16_to_cpu(block->bb_level); + lblock_ok = block->bb_magic == cpu_to_be32(XFS_BMAP_MAGIC) && + level < max(mp->m_bm_maxlevels[0], mp->m_bm_maxlevels[1]); + + /* numrecs verification */ + lblock_ok = lblock_ok && + be16_to_cpu(block->bb_numrecs) <= mp->m_bmap_dmxr[level != 0]; + + /* sibling pointer verification */ + lblock_ok = lblock_ok && + block->bb_u.l.bb_leftsib && + (block->bb_u.l.bb_leftsib == cpu_to_be64(NULLDFSBNO) || + XFS_FSB_SANITY_CHECK(mp, + be64_to_cpu(block->bb_u.l.bb_leftsib))) && + block->bb_u.l.bb_rightsib && + (block->bb_u.l.bb_rightsib == cpu_to_be64(NULLDFSBNO) || + XFS_FSB_SANITY_CHECK(mp, + be64_to_cpu(block->bb_u.l.bb_rightsib))); + + if (!lblock_ok) { + trace_xfs_btree_corrupt(bp, _RET_IP_); + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, block); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +static void +xfs_bmbt_read_verify( + struct xfs_buf *bp) +{ + xfs_bmbt_verify(bp); +} + +static void +xfs_bmbt_write_verify( + struct xfs_buf *bp) +{ + xfs_bmbt_verify(bp); +} + +const struct xfs_buf_ops xfs_bmbt_buf_ops = { + .verify_read = xfs_bmbt_read_verify, + .verify_write = xfs_bmbt_write_verify, +}; + + #ifdef DEBUG STATIC int xfs_bmbt_keys_inorder( @@ -746,6 +808,7 @@ static const struct xfs_btree_ops xfs_bmbt_ops = { .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, .key_diff = xfs_bmbt_key_diff, + .buf_ops = &xfs_bmbt_buf_ops, #ifdef DEBUG .keys_inorder = xfs_bmbt_keys_inorder, .recs_inorder = xfs_bmbt_recs_inorder, diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h index 0e66c4ea0f8..88469ca0869 100644 --- a/fs/xfs/xfs_bmap_btree.h +++ b/fs/xfs/xfs_bmap_btree.h @@ -236,5 +236,6 @@ extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf); extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_inode *, int); +extern const struct xfs_buf_ops xfs_bmbt_buf_ops; #endif /* __XFS_BMAP_BTREE_H__ */ diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index e53e317b158..db010408d70 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -266,9 +266,13 @@ xfs_btree_dup_cursor( for (i = 0; i < new->bc_nlevels; i++) { new->bc_ptrs[i] = cur->bc_ptrs[i]; new->bc_ra[i] = cur->bc_ra[i]; - if ((bp = cur->bc_bufs[i])) { - if ((error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, - XFS_BUF_ADDR(bp), mp->m_bsize, 0, &bp))) { + bp = cur->bc_bufs[i]; + if (bp) { + error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, + XFS_BUF_ADDR(bp), mp->m_bsize, + 0, &bp, + cur->bc_ops->buf_ops); + if (error) { xfs_btree_del_cursor(new, error); *ncur = NULL; return error; @@ -609,25 +613,26 @@ xfs_btree_offsets( * Get a buffer for the block, return it read in. * Long-form addressing. */ -int /* error */ +int xfs_btree_read_bufl( - xfs_mount_t *mp, /* file system mount point */ - xfs_trans_t *tp, /* transaction pointer */ - xfs_fsblock_t fsbno, /* file system block number */ - uint lock, /* lock flags for read_buf */ - xfs_buf_t **bpp, /* buffer for fsbno */ - int refval) /* ref count value for buffer */ -{ - xfs_buf_t *bp; /* return value */ + struct xfs_mount *mp, /* file system mount point */ + struct xfs_trans *tp, /* transaction pointer */ + xfs_fsblock_t fsbno, /* file system block number */ + uint lock, /* lock flags for read_buf */ + struct xfs_buf **bpp, /* buffer for fsbno */ + int refval, /* ref count value for buffer */ + const struct xfs_buf_ops *ops) +{ + struct xfs_buf *bp; /* return value */ xfs_daddr_t d; /* real disk block address */ - int error; + int error; ASSERT(fsbno != NULLFSBLOCK); d = XFS_FSB_TO_DADDR(mp, fsbno); - if ((error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, d, - mp->m_bsize, lock, &bp))) { + error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, d, + mp->m_bsize, lock, &bp, ops); + if (error) return error; - } ASSERT(!xfs_buf_geterror(bp)); if (bp) xfs_buf_set_ref(bp, refval); @@ -642,15 +647,16 @@ xfs_btree_read_bufl( /* ARGSUSED */ void xfs_btree_reada_bufl( - xfs_mount_t *mp, /* file system mount point */ - xfs_fsblock_t fsbno, /* file system block number */ - xfs_extlen_t count) /* count of filesystem blocks */ + struct xfs_mount *mp, /* file system mount point */ + xfs_fsblock_t fsbno, /* file system block number */ + xfs_extlen_t count, /* count of filesystem blocks */ + const struct xfs_buf_ops *ops) { xfs_daddr_t d; ASSERT(fsbno != NULLFSBLOCK); d = XFS_FSB_TO_DADDR(mp, fsbno); - xfs_buf_readahead(mp->m_ddev_targp, d, mp->m_bsize * count); + xfs_buf_readahead(mp->m_ddev_targp, d, mp->m_bsize * count, ops); } /* @@ -660,17 +666,18 @@ xfs_btree_reada_bufl( /* ARGSUSED */ void xfs_btree_reada_bufs( - xfs_mount_t *mp, /* file system mount point */ - xfs_agnumber_t agno, /* allocation group number */ - xfs_agblock_t agbno, /* allocation group block number */ - xfs_extlen_t count) /* count of filesystem blocks */ + struct xfs_mount *mp, /* file system mount point */ + xfs_agnumber_t agno, /* allocation group number */ + xfs_agblock_t agbno, /* allocation group block number */ + xfs_extlen_t count, /* count of filesystem blocks */ + const struct xfs_buf_ops *ops) { xfs_daddr_t d; ASSERT(agno != NULLAGNUMBER); ASSERT(agbno != NULLAGBLOCK); d = XFS_AGB_TO_DADDR(mp, agno, agbno); - xfs_buf_readahead(mp->m_ddev_targp, d, mp->m_bsize * count); + xfs_buf_readahead(mp->m_ddev_targp, d, mp->m_bsize * count, ops); } STATIC int @@ -684,12 +691,14 @@ xfs_btree_readahead_lblock( xfs_dfsbno_t right = be64_to_cpu(block->bb_u.l.bb_rightsib); if ((lr & XFS_BTCUR_LEFTRA) && left != NULLDFSBNO) { - xfs_btree_reada_bufl(cur->bc_mp, left, 1); + xfs_btree_reada_bufl(cur->bc_mp, left, 1, + cur->bc_ops->buf_ops); rval++; } if ((lr & XFS_BTCUR_RIGHTRA) && right != NULLDFSBNO) { - xfs_btree_reada_bufl(cur->bc_mp, right, 1); + xfs_btree_reada_bufl(cur->bc_mp, right, 1, + cur->bc_ops->buf_ops); rval++; } @@ -709,13 +718,13 @@ xfs_btree_readahead_sblock( if ((lr & XFS_BTCUR_LEFTRA) && left != NULLAGBLOCK) { xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno, - left, 1); + left, 1, cur->bc_ops->buf_ops); rval++; } if ((lr & XFS_BTCUR_RIGHTRA) && right != NULLAGBLOCK) { xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno, - right, 1); + right, 1, cur->bc_ops->buf_ops); rval++; } @@ -853,18 +862,22 @@ xfs_btree_set_sibling( } } -STATIC void +void xfs_btree_init_block( - struct xfs_btree_cur *cur, - int level, - int numrecs, - struct xfs_btree_block *new) /* new block */ + struct xfs_mount *mp, + struct xfs_buf *bp, + __u32 magic, + __u16 level, + __u16 numrecs, + unsigned int flags) { - new->bb_magic = cpu_to_be32(xfs_magics[cur->bc_btnum]); + struct xfs_btree_block *new = XFS_BUF_TO_BLOCK(bp); + + new->bb_magic = cpu_to_be32(magic); new->bb_level = cpu_to_be16(level); new->bb_numrecs = cpu_to_be16(numrecs); - if (cur->bc_flags & XFS_BTREE_LONG_PTRS) { + if (flags & XFS_BTREE_LONG_PTRS) { new->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO); new->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO); } else { @@ -873,6 +886,17 @@ xfs_btree_init_block( } } +STATIC void +xfs_btree_init_block_cur( + struct xfs_btree_cur *cur, + int level, + int numrecs, + struct xfs_buf *bp) +{ + xfs_btree_init_block(cur->bc_mp, bp, xfs_magics[cur->bc_btnum], + level, numrecs, cur->bc_flags); +} + /* * Return true if ptr is the last record in the btree and * we need to track updateÑ• to this record. The decision @@ -972,6 +996,7 @@ xfs_btree_get_buf_block( if (!*bpp) return ENOMEM; + (*bpp)->b_ops = cur->bc_ops->buf_ops; *block = XFS_BUF_TO_BLOCK(*bpp); return 0; } @@ -998,19 +1023,15 @@ xfs_btree_read_buf_block( d = xfs_btree_ptr_to_daddr(cur, ptr); error = xfs_trans_read_buf(mp, cur->bc_tp, mp->m_ddev_targp, d, - mp->m_bsize, flags, bpp); + mp->m_bsize, flags, bpp, + cur->bc_ops->buf_ops); if (error) return error; ASSERT(!xfs_buf_geterror(*bpp)); - xfs_btree_set_refs(cur, *bpp); *block = XFS_BUF_TO_BLOCK(*bpp); - - error = xfs_btree_check_block(cur, *block, level, *bpp); - if (error) - xfs_trans_brelse(cur->bc_tp, *bpp); - return error; + return 0; } /* @@ -2183,7 +2204,7 @@ xfs_btree_split( goto error0; /* Fill in the btree header for the new right block. */ - xfs_btree_init_block(cur, xfs_btree_get_level(left), 0, right); + xfs_btree_init_block_cur(cur, xfs_btree_get_level(left), 0, rbp); /* * Split the entries between the old and the new block evenly. @@ -2492,7 +2513,7 @@ xfs_btree_new_root( nptr = 2; } /* Fill in the new block's btree header and log it. */ - xfs_btree_init_block(cur, cur->bc_nlevels, 2, new); + xfs_btree_init_block_cur(cur, cur->bc_nlevels, 2, nbp); xfs_btree_log_block(cur, nbp, XFS_BB_ALL_BITS); ASSERT(!xfs_btree_ptr_is_null(cur, &lptr) && !xfs_btree_ptr_is_null(cur, &rptr)); diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index 5b240de104c..f932897194e 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -188,6 +188,8 @@ struct xfs_btree_ops { __int64_t (*key_diff)(struct xfs_btree_cur *cur, union xfs_btree_key *key); + const struct xfs_buf_ops *buf_ops; + #ifdef DEBUG /* check that k1 is lower than k2 */ int (*keys_inorder)(struct xfs_btree_cur *cur, @@ -355,7 +357,8 @@ xfs_btree_read_bufl( xfs_fsblock_t fsbno, /* file system block number */ uint lock, /* lock flags for read_buf */ struct xfs_buf **bpp, /* buffer for fsbno */ - int refval);/* ref count value for buffer */ + int refval, /* ref count value for buffer */ + const struct xfs_buf_ops *ops); /* * Read-ahead the block, don't wait for it, don't return a buffer. @@ -365,7 +368,8 @@ void /* error */ xfs_btree_reada_bufl( struct xfs_mount *mp, /* file system mount point */ xfs_fsblock_t fsbno, /* file system block number */ - xfs_extlen_t count); /* count of filesystem blocks */ + xfs_extlen_t count, /* count of filesystem blocks */ + const struct xfs_buf_ops *ops); /* * Read-ahead the block, don't wait for it, don't return a buffer. @@ -376,8 +380,20 @@ xfs_btree_reada_bufs( struct xfs_mount *mp, /* file system mount point */ xfs_agnumber_t agno, /* allocation group number */ xfs_agblock_t agbno, /* allocation group block number */ - xfs_extlen_t count); /* count of filesystem blocks */ + xfs_extlen_t count, /* count of filesystem blocks */ + const struct xfs_buf_ops *ops); +/* + * Initialise a new btree block header + */ +void +xfs_btree_init_block( + struct xfs_mount *mp, + struct xfs_buf *bp, + __u32 magic, + __u16 level, + __u16 numrecs, + unsigned int flags); /* * Common btree core entry points. diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index 933b7930b86..56d1614760c 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -175,7 +175,7 @@ xfs_buf_get_maps( bp->b_map_count = map_count; if (map_count == 1) { - bp->b_maps = &bp->b_map; + bp->b_maps = &bp->__b_map; return 0; } @@ -193,7 +193,7 @@ static void xfs_buf_free_maps( struct xfs_buf *bp) { - if (bp->b_maps != &bp->b_map) { + if (bp->b_maps != &bp->__b_map) { kmem_free(bp->b_maps); bp->b_maps = NULL; } @@ -377,8 +377,8 @@ xfs_buf_allocate_memory( } use_alloc_page: - start = BBTOB(bp->b_map.bm_bn) >> PAGE_SHIFT; - end = (BBTOB(bp->b_map.bm_bn + bp->b_length) + PAGE_SIZE - 1) + start = BBTOB(bp->b_maps[0].bm_bn) >> PAGE_SHIFT; + end = (BBTOB(bp->b_maps[0].bm_bn + bp->b_length) + PAGE_SIZE - 1) >> PAGE_SHIFT; page_count = end - start; error = _xfs_buf_get_pages(bp, page_count, flags); @@ -569,7 +569,9 @@ found: */ if (bp->b_flags & XBF_STALE) { ASSERT((bp->b_flags & _XBF_DELWRI_Q) == 0); + ASSERT(bp->b_iodone == NULL); bp->b_flags &= _XBF_KMEM | _XBF_PAGES; + bp->b_ops = NULL; } trace_xfs_buf_find(bp, flags, _RET_IP_); @@ -638,7 +640,7 @@ _xfs_buf_read( xfs_buf_flags_t flags) { ASSERT(!(flags & XBF_WRITE)); - ASSERT(bp->b_map.bm_bn != XFS_BUF_DADDR_NULL); + ASSERT(bp->b_maps[0].bm_bn != XFS_BUF_DADDR_NULL); bp->b_flags &= ~(XBF_WRITE | XBF_ASYNC | XBF_READ_AHEAD); bp->b_flags |= flags & (XBF_READ | XBF_ASYNC | XBF_READ_AHEAD); @@ -654,7 +656,8 @@ xfs_buf_read_map( struct xfs_buftarg *target, struct xfs_buf_map *map, int nmaps, - xfs_buf_flags_t flags) + xfs_buf_flags_t flags, + const struct xfs_buf_ops *ops) { struct xfs_buf *bp; @@ -666,6 +669,7 @@ xfs_buf_read_map( if (!XFS_BUF_ISDONE(bp)) { XFS_STATS_INC(xb_get_read); + bp->b_ops = ops; _xfs_buf_read(bp, flags); } else if (flags & XBF_ASYNC) { /* @@ -691,13 +695,14 @@ void xfs_buf_readahead_map( struct xfs_buftarg *target, struct xfs_buf_map *map, - int nmaps) + int nmaps, + const struct xfs_buf_ops *ops) { if (bdi_read_congested(target->bt_bdi)) return; xfs_buf_read_map(target, map, nmaps, - XBF_TRYLOCK|XBF_ASYNC|XBF_READ_AHEAD); + XBF_TRYLOCK|XBF_ASYNC|XBF_READ_AHEAD, ops); } /* @@ -709,10 +714,10 @@ xfs_buf_read_uncached( struct xfs_buftarg *target, xfs_daddr_t daddr, size_t numblks, - int flags) + int flags, + const struct xfs_buf_ops *ops) { - xfs_buf_t *bp; - int error; + struct xfs_buf *bp; bp = xfs_buf_get_uncached(target, numblks, flags); if (!bp) @@ -723,13 +728,10 @@ xfs_buf_read_uncached( bp->b_bn = daddr; bp->b_maps[0].bm_bn = daddr; bp->b_flags |= XBF_READ; + bp->b_ops = ops; xfsbdstrat(target->bt_mount, bp); - error = xfs_buf_iowait(bp); - if (error) { - xfs_buf_relse(bp); - return NULL; - } + xfs_buf_iowait(bp); return bp; } @@ -999,27 +1001,37 @@ STATIC void xfs_buf_iodone_work( struct work_struct *work) { - xfs_buf_t *bp = + struct xfs_buf *bp = container_of(work, xfs_buf_t, b_iodone_work); + bool read = !!(bp->b_flags & XBF_READ); + + bp->b_flags &= ~(XBF_READ | XBF_WRITE | XBF_READ_AHEAD); + if (read && bp->b_ops) + bp->b_ops->verify_read(bp); if (bp->b_iodone) (*(bp->b_iodone))(bp); else if (bp->b_flags & XBF_ASYNC) xfs_buf_relse(bp); + else { + ASSERT(read && bp->b_ops); + complete(&bp->b_iowait); + } } void xfs_buf_ioend( - xfs_buf_t *bp, - int schedule) + struct xfs_buf *bp, + int schedule) { + bool read = !!(bp->b_flags & XBF_READ); + trace_xfs_buf_iodone(bp, _RET_IP_); - bp->b_flags &= ~(XBF_READ | XBF_WRITE | XBF_READ_AHEAD); if (bp->b_error == 0) bp->b_flags |= XBF_DONE; - if ((bp->b_iodone) || (bp->b_flags & XBF_ASYNC)) { + if (bp->b_iodone || (read && bp->b_ops) || (bp->b_flags & XBF_ASYNC)) { if (schedule) { INIT_WORK(&bp->b_iodone_work, xfs_buf_iodone_work); queue_work(xfslogd_workqueue, &bp->b_iodone_work); @@ -1027,6 +1039,7 @@ xfs_buf_ioend( xfs_buf_iodone_work(&bp->b_iodone_work); } } else { + bp->b_flags &= ~(XBF_READ | XBF_WRITE | XBF_READ_AHEAD); complete(&bp->b_iowait); } } @@ -1197,9 +1210,14 @@ xfs_buf_bio_end_io( { xfs_buf_t *bp = (xfs_buf_t *)bio->bi_private; - xfs_buf_ioerror(bp, -error); + /* + * don't overwrite existing errors - otherwise we can lose errors on + * buffers that require multiple bios to complete. + */ + if (!bp->b_error) + xfs_buf_ioerror(bp, -error); - if (!error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ)) + if (!bp->b_error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ)) invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp)); _xfs_buf_ioend(bp, 1); @@ -1279,6 +1297,11 @@ next_chunk: if (size) goto next_chunk; } else { + /* + * This is guaranteed not to be the last io reference count + * because the caller (xfs_buf_iorequest) holds a count itself. + */ + atomic_dec(&bp->b_io_remaining); xfs_buf_ioerror(bp, EIO); bio_put(bio); } @@ -1304,6 +1327,20 @@ _xfs_buf_ioapply( rw |= REQ_FUA; if (bp->b_flags & XBF_FLUSH) rw |= REQ_FLUSH; + + /* + * Run the write verifier callback function if it exists. If + * this function fails it will mark the buffer with an error and + * the IO should not be dispatched. + */ + if (bp->b_ops) { + bp->b_ops->verify_write(bp); + if (bp->b_error) { + xfs_force_shutdown(bp->b_target->bt_mount, + SHUTDOWN_CORRUPT_INCORE); + return; + } + } } else if (bp->b_flags & XBF_READ_AHEAD) { rw = READA; } else { @@ -1672,7 +1709,7 @@ xfs_buf_cmp( struct xfs_buf *bp = container_of(b, struct xfs_buf, b_list); xfs_daddr_t diff; - diff = ap->b_map.bm_bn - bp->b_map.bm_bn; + diff = ap->b_maps[0].bm_bn - bp->b_maps[0].bm_bn; if (diff < 0) return -1; if (diff > 0) diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 7c0b6a0a155..433a12ed7b1 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -100,6 +100,7 @@ typedef struct xfs_buftarg { struct xfs_buf; typedef void (*xfs_buf_iodone_t)(struct xfs_buf *); + #define XB_PAGES 2 struct xfs_buf_map { @@ -110,6 +111,11 @@ struct xfs_buf_map { #define DEFINE_SINGLE_BUF_MAP(map, blkno, numblk) \ struct xfs_buf_map (map) = { .bm_bn = (blkno), .bm_len = (numblk) }; +struct xfs_buf_ops { + void (*verify_read)(struct xfs_buf *); + void (*verify_write)(struct xfs_buf *); +}; + typedef struct xfs_buf { /* * first cacheline holds all the fields needed for an uncontended cache @@ -145,7 +151,7 @@ typedef struct xfs_buf { struct page **b_pages; /* array of page pointers */ struct page *b_page_array[XB_PAGES]; /* inline pages */ struct xfs_buf_map *b_maps; /* compound buffer map */ - struct xfs_buf_map b_map; /* inline compound buffer map */ + struct xfs_buf_map __b_map; /* inline compound buffer map */ int b_map_count; int b_io_length; /* IO size in BBs */ atomic_t b_pin_count; /* pin count */ @@ -153,13 +159,13 @@ typedef struct xfs_buf { unsigned int b_page_count; /* size of page array */ unsigned int b_offset; /* page offset in first page */ unsigned short b_error; /* error code on I/O */ + const struct xfs_buf_ops *b_ops; #ifdef XFS_BUF_LOCK_TRACKING int b_last_holder; #endif } xfs_buf_t; - /* Finding and Reading Buffers */ struct xfs_buf *_xfs_buf_find(struct xfs_buftarg *target, struct xfs_buf_map *map, int nmaps, @@ -196,9 +202,11 @@ struct xfs_buf *xfs_buf_get_map(struct xfs_buftarg *target, xfs_buf_flags_t flags); struct xfs_buf *xfs_buf_read_map(struct xfs_buftarg *target, struct xfs_buf_map *map, int nmaps, - xfs_buf_flags_t flags); + xfs_buf_flags_t flags, + const struct xfs_buf_ops *ops); void xfs_buf_readahead_map(struct xfs_buftarg *target, - struct xfs_buf_map *map, int nmaps); + struct xfs_buf_map *map, int nmaps, + const struct xfs_buf_ops *ops); static inline struct xfs_buf * xfs_buf_get( @@ -216,20 +224,22 @@ xfs_buf_read( struct xfs_buftarg *target, xfs_daddr_t blkno, size_t numblks, - xfs_buf_flags_t flags) + xfs_buf_flags_t flags, + const struct xfs_buf_ops *ops) { DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); - return xfs_buf_read_map(target, &map, 1, flags); + return xfs_buf_read_map(target, &map, 1, flags, ops); } static inline void xfs_buf_readahead( struct xfs_buftarg *target, xfs_daddr_t blkno, - size_t numblks) + size_t numblks, + const struct xfs_buf_ops *ops) { DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); - return xfs_buf_readahead_map(target, &map, 1); + return xfs_buf_readahead_map(target, &map, 1, ops); } struct xfs_buf *xfs_buf_get_empty(struct xfs_buftarg *target, size_t numblks); @@ -239,7 +249,8 @@ int xfs_buf_associate_memory(struct xfs_buf *bp, void *mem, size_t length); struct xfs_buf *xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks, int flags); struct xfs_buf *xfs_buf_read_uncached(struct xfs_buftarg *target, - xfs_daddr_t daddr, size_t numblks, int flags); + xfs_daddr_t daddr, size_t numblks, int flags, + const struct xfs_buf_ops *ops); void xfs_buf_hold(struct xfs_buf *bp); /* Releasing Buffers */ @@ -319,8 +330,8 @@ void xfs_buf_stale(struct xfs_buf *bp); * In future, uncached buffers will pass the block number directly to the io * request function and hence these macros will go away at that point. */ -#define XFS_BUF_ADDR(bp) ((bp)->b_map.bm_bn) -#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_map.bm_bn = (xfs_daddr_t)(bno)) +#define XFS_BUF_ADDR(bp) ((bp)->b_maps[0].bm_bn) +#define XFS_BUF_SET_ADDR(bp, bno) ((bp)->b_maps[0].bm_bn = (xfs_daddr_t)(bno)) static inline void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref) { diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index a8d0ed91119..77b09750e92 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -71,7 +71,7 @@ xfs_buf_item_log_debug( chunk_num = byte >> XFS_BLF_SHIFT; word_num = chunk_num >> BIT_TO_WORD_SHIFT; bit_num = chunk_num & (NBWORD - 1); - wordp = &(bip->bli_format.blf_data_map[word_num]); + wordp = &(bip->__bli_format.blf_data_map[word_num]); bit_set = *wordp & (1 << bit_num); ASSERT(bit_set); byte++; @@ -237,7 +237,7 @@ xfs_buf_item_size( * cancel flag in it. */ trace_xfs_buf_item_size_stale(bip); - ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL); + ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL); return bip->bli_format_count; } @@ -278,7 +278,7 @@ xfs_buf_item_format_segment( uint buffer_offset; /* copy the flags across from the base format item */ - blfp->blf_flags = bip->bli_format.blf_flags; + blfp->blf_flags = bip->__bli_format.blf_flags; /* * Base size is the actual size of the ondisk structure - it reflects @@ -287,6 +287,17 @@ xfs_buf_item_format_segment( */ base_size = offsetof(struct xfs_buf_log_format, blf_data_map) + (blfp->blf_map_size * sizeof(blfp->blf_data_map[0])); + + nvecs = 0; + first_bit = xfs_next_bit(blfp->blf_data_map, blfp->blf_map_size, 0); + if (!(bip->bli_flags & XFS_BLI_STALE) && first_bit == -1) { + /* + * If the map is not be dirty in the transaction, mark + * the size as zero and do not advance the vector pointer. + */ + goto out; + } + vecp->i_addr = blfp; vecp->i_len = base_size; vecp->i_type = XLOG_REG_TYPE_BFORMAT; @@ -301,15 +312,13 @@ xfs_buf_item_format_segment( */ trace_xfs_buf_item_format_stale(bip); ASSERT(blfp->blf_flags & XFS_BLF_CANCEL); - blfp->blf_size = nvecs; - return vecp; + goto out; } /* * Fill in an iovec for each set of contiguous chunks. */ - first_bit = xfs_next_bit(blfp->blf_data_map, blfp->blf_map_size, 0); - ASSERT(first_bit != -1); + last_bit = first_bit; nbits = 1; for (;;) { @@ -371,7 +380,8 @@ xfs_buf_item_format_segment( nbits++; } } - bip->bli_format.blf_size = nvecs; +out: + blfp->blf_size = nvecs; return vecp; } @@ -405,7 +415,7 @@ xfs_buf_item_format( if (bip->bli_flags & XFS_BLI_INODE_BUF) { if (!((bip->bli_flags & XFS_BLI_INODE_ALLOC_BUF) && xfs_log_item_in_current_chkpt(lip))) - bip->bli_format.blf_flags |= XFS_BLF_INODE_BUF; + bip->__bli_format.blf_flags |= XFS_BLF_INODE_BUF; bip->bli_flags &= ~XFS_BLI_INODE_BUF; } @@ -485,7 +495,7 @@ xfs_buf_item_unpin( ASSERT(bip->bli_flags & XFS_BLI_STALE); ASSERT(xfs_buf_islocked(bp)); ASSERT(XFS_BUF_ISSTALE(bp)); - ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL); + ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL); trace_xfs_buf_item_unpin_stale(bip); @@ -526,7 +536,25 @@ xfs_buf_item_unpin( } xfs_buf_relse(bp); } else if (freed && remove) { + /* + * There are currently two references to the buffer - the active + * LRU reference and the buf log item. What we are about to do + * here - simulate a failed IO completion - requires 3 + * references. + * + * The LRU reference is removed by the xfs_buf_stale() call. The + * buf item reference is removed by the xfs_buf_iodone() + * callback that is run by xfs_buf_do_callbacks() during ioend + * processing (via the bp->b_iodone callback), and then finally + * the ioend processing will drop the IO reference if the buffer + * is marked XBF_ASYNC. + * + * Hence we need to take an additional reference here so that IO + * completion processing doesn't free the buffer prematurely. + */ xfs_buf_lock(bp); + xfs_buf_hold(bp); + bp->b_flags |= XBF_ASYNC; xfs_buf_ioerror(bp, EIO); XFS_BUF_UNDONE(bp); xfs_buf_stale(bp); @@ -583,7 +611,7 @@ xfs_buf_item_unlock( { struct xfs_buf_log_item *bip = BUF_ITEM(lip); struct xfs_buf *bp = bip->bli_buf; - int aborted; + int aborted, clean, i; uint hold; /* Clear the buffer's association with this transaction. */ @@ -613,7 +641,7 @@ xfs_buf_item_unlock( */ if (bip->bli_flags & XFS_BLI_STALE) { trace_xfs_buf_item_unlock_stale(bip); - ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL); + ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL); if (!aborted) { atomic_dec(&bip->bli_refcount); return; @@ -626,8 +654,15 @@ xfs_buf_item_unlock( * If the buf item isn't tracking any data, free it, otherwise drop the * reference we hold to it. */ - if (xfs_bitmap_empty(bip->bli_format.blf_data_map, - bip->bli_format.blf_map_size)) + clean = 1; + for (i = 0; i < bip->bli_format_count; i++) { + if (!xfs_bitmap_empty(bip->bli_formats[i].blf_data_map, + bip->bli_formats[i].blf_map_size)) { + clean = 0; + break; + } + } + if (clean) xfs_buf_item_relse(bp); else atomic_dec(&bip->bli_refcount); @@ -698,7 +733,7 @@ xfs_buf_item_get_format( bip->bli_format_count = count; if (count == 1) { - bip->bli_formats = &bip->bli_format; + bip->bli_formats = &bip->__bli_format; return 0; } @@ -713,7 +748,7 @@ STATIC void xfs_buf_item_free_format( struct xfs_buf_log_item *bip) { - if (bip->bli_formats != &bip->bli_format) { + if (bip->bli_formats != &bip->__bli_format) { kmem_free(bip->bli_formats); bip->bli_formats = NULL; } diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h index 6850f49f4af..16def435944 100644 --- a/fs/xfs/xfs_buf_item.h +++ b/fs/xfs/xfs_buf_item.h @@ -104,7 +104,7 @@ typedef struct xfs_buf_log_item { #endif int bli_format_count; /* count of headers */ struct xfs_buf_log_format *bli_formats; /* array of in-log header ptrs */ - struct xfs_buf_log_format bli_format; /* embedded in-log header */ + struct xfs_buf_log_format __bli_format; /* embedded in-log header */ } xfs_buf_log_item_t; void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *); diff --git a/fs/xfs/xfs_cksum.h b/fs/xfs/xfs_cksum.h new file mode 100644 index 00000000000..fad1676ad8c --- /dev/null +++ b/fs/xfs/xfs_cksum.h @@ -0,0 +1,63 @@ +#ifndef _XFS_CKSUM_H +#define _XFS_CKSUM_H 1 + +#define XFS_CRC_SEED (~(__uint32_t)0) + +/* + * Calculate the intermediate checksum for a buffer that has the CRC field + * inside it. The offset of the 32bit crc fields is passed as the + * cksum_offset parameter. + */ +static inline __uint32_t +xfs_start_cksum(char *buffer, size_t length, unsigned long cksum_offset) +{ + __uint32_t zero = 0; + __uint32_t crc; + + /* Calculate CRC up to the checksum. */ + crc = crc32c(XFS_CRC_SEED, buffer, cksum_offset); + + /* Skip checksum field */ + crc = crc32c(crc, &zero, sizeof(__u32)); + + /* Calculate the rest of the CRC. */ + return crc32c(crc, &buffer[cksum_offset + sizeof(__be32)], + length - (cksum_offset + sizeof(__be32))); +} + +/* + * Convert the intermediate checksum to the final ondisk format. + * + * The CRC32c calculation uses LE format even on BE machines, but returns the + * result in host endian format. Hence we need to byte swap it back to LE format + * so that it is consistent on disk. + */ +static inline __le32 +xfs_end_cksum(__uint32_t crc) +{ + return ~cpu_to_le32(crc); +} + +/* + * Helper to generate the checksum for a buffer. + */ +static inline void +xfs_update_cksum(char *buffer, size_t length, unsigned long cksum_offset) +{ + __uint32_t crc = xfs_start_cksum(buffer, length, cksum_offset); + + *(__le32 *)(buffer + cksum_offset) = xfs_end_cksum(crc); +} + +/* + * Helper to verify the checksum for a buffer. + */ +static inline int +xfs_verify_cksum(char *buffer, size_t length, unsigned long cksum_offset) +{ + __uint32_t crc = xfs_start_cksum(buffer, length, cksum_offset); + + return *(__le32 *)(buffer + cksum_offset) == xfs_end_cksum(crc); +} + +#endif /* _XFS_CKSUM_H */ diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c index 7bfb7dd334f..4d7696a0241 100644 --- a/fs/xfs/xfs_da_btree.c +++ b/fs/xfs/xfs_da_btree.c @@ -91,6 +91,84 @@ STATIC int xfs_da_blk_unlink(xfs_da_state_t *state, xfs_da_state_blk_t *save_blk); STATIC void xfs_da_state_kill_altpath(xfs_da_state_t *state); +static void +xfs_da_node_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_da_node_hdr *hdr = bp->b_addr; + int block_ok = 0; + + block_ok = hdr->info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC); + block_ok = block_ok && + be16_to_cpu(hdr->level) > 0 && + be16_to_cpu(hdr->count) > 0 ; + if (!block_ok) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } + +} + +static void +xfs_da_node_write_verify( + struct xfs_buf *bp) +{ + xfs_da_node_verify(bp); +} + +/* + * leaf/node format detection on trees is sketchy, so a node read can be done on + * leaf level blocks when detection identifies the tree as a node format tree + * incorrectly. In this case, we need to swap the verifier to match the correct + * format of the block being read. + */ +static void +xfs_da_node_read_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_da_blkinfo *info = bp->b_addr; + + switch (be16_to_cpu(info->magic)) { + case XFS_DA_NODE_MAGIC: + xfs_da_node_verify(bp); + break; + case XFS_ATTR_LEAF_MAGIC: + bp->b_ops = &xfs_attr_leaf_buf_ops; + bp->b_ops->verify_read(bp); + return; + case XFS_DIR2_LEAFN_MAGIC: + bp->b_ops = &xfs_dir2_leafn_buf_ops; + bp->b_ops->verify_read(bp); + return; + default: + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, + mp, info); + xfs_buf_ioerror(bp, EFSCORRUPTED); + break; + } +} + +const struct xfs_buf_ops xfs_da_node_buf_ops = { + .verify_read = xfs_da_node_read_verify, + .verify_write = xfs_da_node_write_verify, +}; + + +int +xfs_da_node_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t bno, + xfs_daddr_t mappedbno, + struct xfs_buf **bpp, + int which_fork) +{ + return xfs_da_read_buf(tp, dp, bno, mappedbno, bpp, + which_fork, &xfs_da_node_buf_ops); +} + /*======================================================================== * Routines used for growing the Btree. *========================================================================*/ @@ -125,6 +203,7 @@ xfs_da_node_create(xfs_da_args_t *args, xfs_dablk_t blkno, int level, xfs_trans_log_buf(tp, bp, XFS_DA_LOGRANGE(node, &node->hdr, sizeof(node->hdr))); + bp->b_ops = &xfs_da_node_buf_ops; *bpp = bp; return(0); } @@ -324,6 +403,8 @@ xfs_da_root_split(xfs_da_state_t *state, xfs_da_state_blk_t *blk1, } memcpy(node, oldroot, size); xfs_trans_log_buf(tp, bp, 0, size - 1); + + bp->b_ops = blk1->bp->b_ops; blk1->bp = bp; blk1->blkno = blkno; @@ -746,7 +827,7 @@ xfs_da_root_join(xfs_da_state_t *state, xfs_da_state_blk_t *root_blk) */ child = be32_to_cpu(oldroot->btree[0].before); ASSERT(child != 0); - error = xfs_da_read_buf(args->trans, args->dp, child, -1, &bp, + error = xfs_da_node_read(args->trans, args->dp, child, -1, &bp, args->whichfork); if (error) return(error); @@ -754,7 +835,14 @@ xfs_da_root_join(xfs_da_state_t *state, xfs_da_state_blk_t *root_blk) xfs_da_blkinfo_onlychild_validate(bp->b_addr, be16_to_cpu(oldroot->hdr.level)); + /* + * This could be copying a leaf back into the root block in the case of + * there only being a single leaf block left in the tree. Hence we have + * to update the b_ops pointer as well to match the buffer type change + * that could occur. + */ memcpy(root_blk->bp->b_addr, bp->b_addr, state->blocksize); + root_blk->bp->b_ops = bp->b_ops; xfs_trans_log_buf(args->trans, root_blk->bp, 0, state->blocksize - 1); error = xfs_da_shrink_inode(args, child, bp); return(error); @@ -779,6 +867,8 @@ xfs_da_node_toosmall(xfs_da_state_t *state, int *action) xfs_dablk_t blkno; struct xfs_buf *bp; + trace_xfs_da_node_toosmall(state->args); + /* * Check for the degenerate case of the block being over 50% full. * If so, it's not worth even looking to see if we might be able @@ -835,7 +925,7 @@ xfs_da_node_toosmall(xfs_da_state_t *state, int *action) blkno = be32_to_cpu(info->back); if (blkno == 0) continue; - error = xfs_da_read_buf(state->args->trans, state->args->dp, + error = xfs_da_node_read(state->args->trans, state->args->dp, blkno, -1, &bp, state->args->whichfork); if (error) return(error); @@ -900,6 +990,8 @@ xfs_da_fixhashpath(xfs_da_state_t *state, xfs_da_state_path_t *path) xfs_dahash_t lasthash=0; int level, count; + trace_xfs_da_fixhashpath(state->args); + level = path->active-1; blk = &path->blk[ level ]; switch (blk->magic) { @@ -1079,7 +1171,7 @@ xfs_da_node_lookup_int(xfs_da_state_t *state, int *result) * Read the next node down in the tree. */ blk->blkno = blkno; - error = xfs_da_read_buf(args->trans, args->dp, blkno, + error = xfs_da_node_read(args->trans, args->dp, blkno, -1, &blk->bp, args->whichfork); if (error) { blk->blkno = 0; @@ -1241,7 +1333,7 @@ xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk, new_info->forw = cpu_to_be32(old_blk->blkno); new_info->back = old_info->back; if (old_info->back) { - error = xfs_da_read_buf(args->trans, args->dp, + error = xfs_da_node_read(args->trans, args->dp, be32_to_cpu(old_info->back), -1, &bp, args->whichfork); if (error) @@ -1262,7 +1354,7 @@ xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk, new_info->forw = old_info->forw; new_info->back = cpu_to_be32(old_blk->blkno); if (old_info->forw) { - error = xfs_da_read_buf(args->trans, args->dp, + error = xfs_da_node_read(args->trans, args->dp, be32_to_cpu(old_info->forw), -1, &bp, args->whichfork); if (error) @@ -1362,7 +1454,7 @@ xfs_da_blk_unlink(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk, trace_xfs_da_unlink_back(args); save_info->back = drop_info->back; if (drop_info->back) { - error = xfs_da_read_buf(args->trans, args->dp, + error = xfs_da_node_read(args->trans, args->dp, be32_to_cpu(drop_info->back), -1, &bp, args->whichfork); if (error) @@ -1379,7 +1471,7 @@ xfs_da_blk_unlink(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk, trace_xfs_da_unlink_forward(args); save_info->forw = drop_info->forw; if (drop_info->forw) { - error = xfs_da_read_buf(args->trans, args->dp, + error = xfs_da_node_read(args->trans, args->dp, be32_to_cpu(drop_info->forw), -1, &bp, args->whichfork); if (error) @@ -1417,6 +1509,8 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path, xfs_dablk_t blkno=0; int level, error; + trace_xfs_da_path_shift(state->args); + /* * Roll up the Btree looking for the first block where our * current index is not at the edge of the block. Note that @@ -1463,8 +1557,8 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path, * Read the next child block. */ blk->blkno = blkno; - error = xfs_da_read_buf(args->trans, args->dp, blkno, -1, - &blk->bp, args->whichfork); + error = xfs_da_node_read(args->trans, args->dp, blkno, -1, + &blk->bp, args->whichfork); if (error) return(error); ASSERT(blk->bp != NULL); @@ -1727,7 +1821,8 @@ xfs_da_swap_lastblock( * Read the last block in the btree space. */ last_blkno = (xfs_dablk_t)lastoff - mp->m_dirblkfsbs; - if ((error = xfs_da_read_buf(tp, ip, last_blkno, -1, &last_buf, w))) + error = xfs_da_node_read(tp, ip, last_blkno, -1, &last_buf, w); + if (error) return error; /* * Copy the last block into the dead buffer and log it. @@ -1753,7 +1848,8 @@ xfs_da_swap_lastblock( * If the moved block has a left sibling, fix up the pointers. */ if ((sib_blkno = be32_to_cpu(dead_info->back))) { - if ((error = xfs_da_read_buf(tp, ip, sib_blkno, -1, &sib_buf, w))) + error = xfs_da_node_read(tp, ip, sib_blkno, -1, &sib_buf, w); + if (error) goto done; sib_info = sib_buf->b_addr; if (unlikely( @@ -1774,7 +1870,8 @@ xfs_da_swap_lastblock( * If the moved block has a right sibling, fix up the pointers. */ if ((sib_blkno = be32_to_cpu(dead_info->forw))) { - if ((error = xfs_da_read_buf(tp, ip, sib_blkno, -1, &sib_buf, w))) + error = xfs_da_node_read(tp, ip, sib_blkno, -1, &sib_buf, w); + if (error) goto done; sib_info = sib_buf->b_addr; if (unlikely( @@ -1797,7 +1894,8 @@ xfs_da_swap_lastblock( * Walk down the tree looking for the parent of the moved block. */ for (;;) { - if ((error = xfs_da_read_buf(tp, ip, par_blkno, -1, &par_buf, w))) + error = xfs_da_node_read(tp, ip, par_blkno, -1, &par_buf, w); + if (error) goto done; par_node = par_buf->b_addr; if (unlikely(par_node->hdr.info.magic != @@ -1847,7 +1945,8 @@ xfs_da_swap_lastblock( error = XFS_ERROR(EFSCORRUPTED); goto done; } - if ((error = xfs_da_read_buf(tp, ip, par_blkno, -1, &par_buf, w))) + error = xfs_da_node_read(tp, ip, par_blkno, -1, &par_buf, w); + if (error) goto done; par_node = par_buf->b_addr; if (unlikely( @@ -2133,7 +2232,8 @@ xfs_da_read_buf( xfs_dablk_t bno, xfs_daddr_t mappedbno, struct xfs_buf **bpp, - int whichfork) + int whichfork, + const struct xfs_buf_ops *ops) { struct xfs_buf *bp; struct xfs_buf_map map; @@ -2155,7 +2255,7 @@ xfs_da_read_buf( error = xfs_trans_read_buf_map(dp->i_mount, trans, dp->i_mount->m_ddev_targp, - mapp, nmap, 0, &bp); + mapp, nmap, 0, &bp, ops); if (error) goto out_free; @@ -2211,9 +2311,10 @@ xfs_da_reada_buf( struct xfs_trans *trans, struct xfs_inode *dp, xfs_dablk_t bno, - int whichfork) + xfs_daddr_t mappedbno, + int whichfork, + const struct xfs_buf_ops *ops) { - xfs_daddr_t mappedbno = -1; struct xfs_buf_map map; struct xfs_buf_map *mapp; int nmap; @@ -2221,7 +2322,7 @@ xfs_da_reada_buf( mapp = ↦ nmap = 1; - error = xfs_dabuf_map(trans, dp, bno, -1, whichfork, + error = xfs_dabuf_map(trans, dp, bno, mappedbno, whichfork, &mapp, &nmap); if (error) { /* mapping a hole is not an error, but we don't continue */ @@ -2231,7 +2332,7 @@ xfs_da_reada_buf( } mappedbno = mapp[0].bm_bn; - xfs_buf_readahead_map(dp->i_mount->m_ddev_targp, mapp, nmap); + xfs_buf_readahead_map(dp->i_mount->m_ddev_targp, mapp, nmap, ops); out_free: if (mapp != &map) diff --git a/fs/xfs/xfs_da_btree.h b/fs/xfs/xfs_da_btree.h index 132adafb041..ee5170c46ae 100644 --- a/fs/xfs/xfs_da_btree.h +++ b/fs/xfs/xfs_da_btree.h @@ -18,7 +18,6 @@ #ifndef __XFS_DA_BTREE_H__ #define __XFS_DA_BTREE_H__ -struct xfs_buf; struct xfs_bmap_free; struct xfs_inode; struct xfs_mount; @@ -214,6 +213,9 @@ int xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path, */ int xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk, xfs_da_state_blk_t *new_blk); +int xfs_da_node_read(struct xfs_trans *tp, struct xfs_inode *dp, + xfs_dablk_t bno, xfs_daddr_t mappedbno, + struct xfs_buf **bpp, int which_fork); /* * Utility routines. @@ -226,9 +228,11 @@ int xfs_da_get_buf(struct xfs_trans *trans, struct xfs_inode *dp, struct xfs_buf **bp, int whichfork); int xfs_da_read_buf(struct xfs_trans *trans, struct xfs_inode *dp, xfs_dablk_t bno, xfs_daddr_t mappedbno, - struct xfs_buf **bpp, int whichfork); + struct xfs_buf **bpp, int whichfork, + const struct xfs_buf_ops *ops); xfs_daddr_t xfs_da_reada_buf(struct xfs_trans *trans, struct xfs_inode *dp, - xfs_dablk_t bno, int whichfork); + xfs_dablk_t bno, xfs_daddr_t mapped_bno, + int whichfork, const struct xfs_buf_ops *ops); int xfs_da_shrink_inode(xfs_da_args_t *args, xfs_dablk_t dead_blkno, struct xfs_buf *dead_buf); diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c index b9b8646e62d..d0e9c74d3d9 100644 --- a/fs/xfs/xfs_dfrag.c +++ b/fs/xfs/xfs_dfrag.c @@ -246,12 +246,10 @@ xfs_swap_extents( goto out_unlock; } - if (VN_CACHED(VFS_I(tip)) != 0) { - error = xfs_flushinval_pages(tip, 0, -1, - FI_REMAPF_LOCKED); - if (error) - goto out_unlock; - } + error = -filemap_write_and_wait(VFS_I(ip)->i_mapping); + if (error) + goto out_unlock; + truncate_pagecache_range(VFS_I(ip), 0, -1); /* Verify O_DIRECT for ftmp */ if (VN_CACHED(VFS_I(tip)) != 0) { @@ -315,8 +313,7 @@ xfs_swap_extents( * are safe. We don't really care if non-io related * fields change. */ - - xfs_tosspages(ip, 0, -1, FI_REMAPF); + truncate_pagecache_range(VFS_I(ip), 0, -1); tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT); if ((error = xfs_trans_reserve(tp, 0, diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c index e93ca8f054f..12afe07a91d 100644 --- a/fs/xfs/xfs_dir2_block.c +++ b/fs/xfs/xfs_dir2_block.c @@ -56,6 +56,214 @@ xfs_dir_startup(void) xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2); } +static void +xfs_dir2_block_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_dir2_data_hdr *hdr = bp->b_addr; + int block_ok = 0; + + block_ok = hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC); + block_ok = block_ok && __xfs_dir2_data_check(NULL, bp) == 0; + + if (!block_ok) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +static void +xfs_dir2_block_read_verify( + struct xfs_buf *bp) +{ + xfs_dir2_block_verify(bp); +} + +static void +xfs_dir2_block_write_verify( + struct xfs_buf *bp) +{ + xfs_dir2_block_verify(bp); +} + +const struct xfs_buf_ops xfs_dir2_block_buf_ops = { + .verify_read = xfs_dir2_block_read_verify, + .verify_write = xfs_dir2_block_write_verify, +}; + +static int +xfs_dir2_block_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + struct xfs_buf **bpp) +{ + struct xfs_mount *mp = dp->i_mount; + + return xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, bpp, + XFS_DATA_FORK, &xfs_dir2_block_buf_ops); +} + +static void +xfs_dir2_block_need_space( + struct xfs_dir2_data_hdr *hdr, + struct xfs_dir2_block_tail *btp, + struct xfs_dir2_leaf_entry *blp, + __be16 **tagpp, + struct xfs_dir2_data_unused **dupp, + struct xfs_dir2_data_unused **enddupp, + int *compact, + int len) +{ + struct xfs_dir2_data_free *bf; + __be16 *tagp = NULL; + struct xfs_dir2_data_unused *dup = NULL; + struct xfs_dir2_data_unused *enddup = NULL; + + *compact = 0; + bf = hdr->bestfree; + + /* + * If there are stale entries we'll use one for the leaf. + */ + if (btp->stale) { + if (be16_to_cpu(bf[0].length) >= len) { + /* + * The biggest entry enough to avoid compaction. + */ + dup = (xfs_dir2_data_unused_t *) + ((char *)hdr + be16_to_cpu(bf[0].offset)); + goto out; + } + + /* + * Will need to compact to make this work. + * Tag just before the first leaf entry. + */ + *compact = 1; + tagp = (__be16 *)blp - 1; + + /* Data object just before the first leaf entry. */ + dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); + + /* + * If it's not free then the data will go where the + * leaf data starts now, if it works at all. + */ + if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { + if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) * + (uint)sizeof(*blp) < len) + dup = NULL; + } else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len) + dup = NULL; + else + dup = (xfs_dir2_data_unused_t *)blp; + goto out; + } + + /* + * no stale entries, so just use free space. + * Tag just before the first leaf entry. + */ + tagp = (__be16 *)blp - 1; + + /* Data object just before the first leaf entry. */ + enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); + + /* + * If it's not free then can't do this add without cleaning up: + * the space before the first leaf entry needs to be free so it + * can be expanded to hold the pointer to the new entry. + */ + if (be16_to_cpu(enddup->freetag) == XFS_DIR2_DATA_FREE_TAG) { + /* + * Check out the biggest freespace and see if it's the same one. + */ + dup = (xfs_dir2_data_unused_t *) + ((char *)hdr + be16_to_cpu(bf[0].offset)); + if (dup != enddup) { + /* + * Not the same free entry, just check its length. + */ + if (be16_to_cpu(dup->length) < len) + dup = NULL; + goto out; + } + + /* + * It is the biggest freespace, can it hold the leaf too? + */ + if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) { + /* + * Yes, use the second-largest entry instead if it works. + */ + if (be16_to_cpu(bf[1].length) >= len) + dup = (xfs_dir2_data_unused_t *) + ((char *)hdr + be16_to_cpu(bf[1].offset)); + else + dup = NULL; + } + } +out: + *tagpp = tagp; + *dupp = dup; + *enddupp = enddup; +} + +/* + * compact the leaf entries. + * Leave the highest-numbered stale entry stale. + * XXX should be the one closest to mid but mid is not yet computed. + */ +static void +xfs_dir2_block_compact( + struct xfs_trans *tp, + struct xfs_buf *bp, + struct xfs_dir2_data_hdr *hdr, + struct xfs_dir2_block_tail *btp, + struct xfs_dir2_leaf_entry *blp, + int *needlog, + int *lfloghigh, + int *lfloglow) +{ + int fromidx; /* source leaf index */ + int toidx; /* target leaf index */ + int needscan = 0; + int highstale; /* high stale index */ + + fromidx = toidx = be32_to_cpu(btp->count) - 1; + highstale = *lfloghigh = -1; + for (; fromidx >= 0; fromidx--) { + if (blp[fromidx].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) { + if (highstale == -1) + highstale = toidx; + else { + if (*lfloghigh == -1) + *lfloghigh = toidx; + continue; + } + } + if (fromidx < toidx) + blp[toidx] = blp[fromidx]; + toidx--; + } + *lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1); + *lfloghigh -= be32_to_cpu(btp->stale) - 1; + be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1)); + xfs_dir2_data_make_free(tp, bp, + (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr), + (xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)), + needlog, &needscan); + blp += be32_to_cpu(btp->stale) - 1; + btp->stale = cpu_to_be32(1); + /* + * If we now need to rebuild the bestfree map, do so. + * This needs to happen before the next call to use_free. + */ + if (needscan) + xfs_dir2_data_freescan(tp->t_mountp, hdr, needlog); +} + /* * Add an entry to a block directory. */ @@ -63,7 +271,6 @@ int /* error */ xfs_dir2_block_addname( xfs_da_args_t *args) /* directory op arguments */ { - xfs_dir2_data_free_t *bf; /* bestfree table in block */ xfs_dir2_data_hdr_t *hdr; /* block header */ xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ struct xfs_buf *bp; /* buffer for block */ @@ -94,134 +301,44 @@ xfs_dir2_block_addname( dp = args->dp; tp = args->trans; mp = dp->i_mount; - /* - * Read the (one and only) directory block into dabuf bp. - */ - if ((error = - xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, &bp, XFS_DATA_FORK))) { + + /* Read the (one and only) directory block into bp. */ + error = xfs_dir2_block_read(tp, dp, &bp); + if (error) return error; - } - ASSERT(bp != NULL); - hdr = bp->b_addr; - /* - * Check the magic number, corrupted if wrong. - */ - if (unlikely(hdr->magic != cpu_to_be32(XFS_DIR2_BLOCK_MAGIC))) { - XFS_CORRUPTION_ERROR("xfs_dir2_block_addname", - XFS_ERRLEVEL_LOW, mp, hdr); - xfs_trans_brelse(tp, bp); - return XFS_ERROR(EFSCORRUPTED); - } + len = xfs_dir2_data_entsize(args->namelen); + /* * Set up pointers to parts of the block. */ - bf = hdr->bestfree; + hdr = bp->b_addr; btp = xfs_dir2_block_tail_p(mp, hdr); blp = xfs_dir2_block_leaf_p(btp); + /* - * No stale entries? Need space for entry and new leaf. - */ - if (!btp->stale) { - /* - * Tag just before the first leaf entry. - */ - tagp = (__be16 *)blp - 1; - /* - * Data object just before the first leaf entry. - */ - enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); - /* - * If it's not free then can't do this add without cleaning up: - * the space before the first leaf entry needs to be free so it - * can be expanded to hold the pointer to the new entry. - */ - if (be16_to_cpu(enddup->freetag) != XFS_DIR2_DATA_FREE_TAG) - dup = enddup = NULL; - /* - * Check out the biggest freespace and see if it's the same one. - */ - else { - dup = (xfs_dir2_data_unused_t *) - ((char *)hdr + be16_to_cpu(bf[0].offset)); - if (dup == enddup) { - /* - * It is the biggest freespace, is it too small - * to hold the new leaf too? - */ - if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) { - /* - * Yes, we use the second-largest - * entry instead if it works. - */ - if (be16_to_cpu(bf[1].length) >= len) - dup = (xfs_dir2_data_unused_t *) - ((char *)hdr + - be16_to_cpu(bf[1].offset)); - else - dup = NULL; - } - } else { - /* - * Not the same free entry, - * just check its length. - */ - if (be16_to_cpu(dup->length) < len) { - dup = NULL; - } - } - } - compact = 0; - } - /* - * If there are stale entries we'll use one for the leaf. - * Is the biggest entry enough to avoid compaction? - */ - else if (be16_to_cpu(bf[0].length) >= len) { - dup = (xfs_dir2_data_unused_t *) - ((char *)hdr + be16_to_cpu(bf[0].offset)); - compact = 0; - } - /* - * Will need to compact to make this work. + * Find out if we can reuse stale entries or whether we need extra + * space for entry and new leaf. */ - else { - /* - * Tag just before the first leaf entry. - */ - tagp = (__be16 *)blp - 1; - /* - * Data object just before the first leaf entry. - */ - dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); - /* - * If it's not free then the data will go where the - * leaf data starts now, if it works at all. - */ - if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { - if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) * - (uint)sizeof(*blp) < len) - dup = NULL; - } else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len) - dup = NULL; - else - dup = (xfs_dir2_data_unused_t *)blp; - compact = 1; - } + xfs_dir2_block_need_space(hdr, btp, blp, &tagp, &dup, + &enddup, &compact, len); + /* - * If this isn't a real add, we're done with the buffer. + * Done everything we need for a space check now. */ - if (args->op_flags & XFS_DA_OP_JUSTCHECK) + if (args->op_flags & XFS_DA_OP_JUSTCHECK) { xfs_trans_brelse(tp, bp); + if (!dup) + return XFS_ERROR(ENOSPC); + return 0; + } + /* * If we don't have space for the new entry & leaf ... */ if (!dup) { - /* - * Not trying to actually do anything, or don't have - * a space reservation: return no-space. - */ - if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0) + /* Don't have a space reservation: return no-space. */ + if (args->total == 0) return XFS_ERROR(ENOSPC); /* * Convert to the next larger format. @@ -232,65 +349,26 @@ xfs_dir2_block_addname( return error; return xfs_dir2_leaf_addname(args); } - /* - * Just checking, and it would work, so say so. - */ - if (args->op_flags & XFS_DA_OP_JUSTCHECK) - return 0; + needlog = needscan = 0; + /* * If need to compact the leaf entries, do it now. - * Leave the highest-numbered stale entry stale. - * XXX should be the one closest to mid but mid is not yet computed. */ if (compact) { - int fromidx; /* source leaf index */ - int toidx; /* target leaf index */ - - for (fromidx = toidx = be32_to_cpu(btp->count) - 1, - highstale = lfloghigh = -1; - fromidx >= 0; - fromidx--) { - if (blp[fromidx].address == - cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) { - if (highstale == -1) - highstale = toidx; - else { - if (lfloghigh == -1) - lfloghigh = toidx; - continue; - } - } - if (fromidx < toidx) - blp[toidx] = blp[fromidx]; - toidx--; - } - lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1); - lfloghigh -= be32_to_cpu(btp->stale) - 1; - be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1)); - xfs_dir2_data_make_free(tp, bp, - (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr), - (xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)), - &needlog, &needscan); - blp += be32_to_cpu(btp->stale) - 1; - btp->stale = cpu_to_be32(1); + xfs_dir2_block_compact(tp, bp, hdr, btp, blp, &needlog, + &lfloghigh, &lfloglow); + /* recalculate blp post-compaction */ + blp = xfs_dir2_block_leaf_p(btp); + } else if (btp->stale) { /* - * If we now need to rebuild the bestfree map, do so. - * This needs to happen before the next call to use_free. + * Set leaf logging boundaries to impossible state. + * For the no-stale case they're set explicitly. */ - if (needscan) { - xfs_dir2_data_freescan(mp, hdr, &needlog); - needscan = 0; - } - } - /* - * Set leaf logging boundaries to impossible state. - * For the no-stale case they're set explicitly. - */ - else if (btp->stale) { lfloglow = be32_to_cpu(btp->count); lfloghigh = -1; } + /* * Find the slot that's first lower than our hash value, -1 if none. */ @@ -450,18 +528,13 @@ xfs_dir2_block_getdents( /* * If the block number in the offset is out of range, we're done. */ - if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk) { + if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk) return 0; - } - /* - * Can't read the block, give up, else get dabuf in bp. - */ - error = xfs_da_read_buf(NULL, dp, mp->m_dirdatablk, -1, - &bp, XFS_DATA_FORK); + + error = xfs_dir2_block_read(NULL, dp, &bp); if (error) return error; - ASSERT(bp != NULL); /* * Extract the byte offset we start at from the seek pointer. * We'll skip entries before this. @@ -637,14 +710,11 @@ xfs_dir2_block_lookup_int( dp = args->dp; tp = args->trans; mp = dp->i_mount; - /* - * Read the buffer, return error if we can't get it. - */ - if ((error = - xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, &bp, XFS_DATA_FORK))) { + + error = xfs_dir2_block_read(tp, dp, &bp); + if (error) return error; - } - ASSERT(bp != NULL); + hdr = bp->b_addr; xfs_dir2_data_check(dp, bp); btp = xfs_dir2_block_tail_p(mp, hdr); @@ -917,10 +987,10 @@ xfs_dir2_leaf_to_block( /* * Read the data block if we don't already have it, give up if it fails. */ - if (dbp == NULL && - (error = xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, &dbp, - XFS_DATA_FORK))) { - return error; + if (!dbp) { + error = xfs_dir2_data_read(tp, dp, mp->m_dirdatablk, -1, &dbp); + if (error) + return error; } hdr = dbp->b_addr; ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC)); @@ -944,6 +1014,7 @@ xfs_dir2_leaf_to_block( /* * Start converting it to block form. */ + dbp->b_ops = &xfs_dir2_block_buf_ops; hdr->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC); needlog = 1; needscan = 0; @@ -1073,6 +1144,7 @@ xfs_dir2_sf_to_block( kmem_free(sfp); return error; } + bp->b_ops = &xfs_dir2_block_buf_ops; hdr = bp->b_addr; hdr->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC); /* diff --git a/fs/xfs/xfs_dir2_data.c b/fs/xfs/xfs_dir2_data.c index 44ffd4d6bc9..ffcf1774152 100644 --- a/fs/xfs/xfs_dir2_data.c +++ b/fs/xfs/xfs_dir2_data.c @@ -34,14 +34,13 @@ STATIC xfs_dir2_data_free_t * xfs_dir2_data_freefind(xfs_dir2_data_hdr_t *hdr, xfs_dir2_data_unused_t *dup); -#ifdef DEBUG /* * Check the consistency of the data block. * The input can also be a block-format directory. - * Pop an assert if we find anything bad. + * Return 0 is the buffer is good, otherwise an error. */ -void -xfs_dir2_data_check( +int +__xfs_dir2_data_check( struct xfs_inode *dp, /* incore inode pointer */ struct xfs_buf *bp) /* data block's buffer */ { @@ -64,18 +63,23 @@ xfs_dir2_data_check( int stale; /* count of stale leaves */ struct xfs_name name; - mp = dp->i_mount; + mp = bp->b_target->bt_mount; hdr = bp->b_addr; bf = hdr->bestfree; p = (char *)(hdr + 1); - if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC)) { + switch (hdr->magic) { + case cpu_to_be32(XFS_DIR2_BLOCK_MAGIC): btp = xfs_dir2_block_tail_p(mp, hdr); lep = xfs_dir2_block_leaf_p(btp); endp = (char *)lep; - } else { - ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC)); + break; + case cpu_to_be32(XFS_DIR2_DATA_MAGIC): endp = (char *)hdr + mp->m_dirblksize; + break; + default: + XFS_ERROR_REPORT("Bad Magic", XFS_ERRLEVEL_LOW, mp); + return EFSCORRUPTED; } count = lastfree = freeseen = 0; @@ -83,19 +87,22 @@ xfs_dir2_data_check( * Account for zero bestfree entries. */ if (!bf[0].length) { - ASSERT(!bf[0].offset); + XFS_WANT_CORRUPTED_RETURN(!bf[0].offset); freeseen |= 1 << 0; } if (!bf[1].length) { - ASSERT(!bf[1].offset); + XFS_WANT_CORRUPTED_RETURN(!bf[1].offset); freeseen |= 1 << 1; } if (!bf[2].length) { - ASSERT(!bf[2].offset); + XFS_WANT_CORRUPTED_RETURN(!bf[2].offset); freeseen |= 1 << 2; } - ASSERT(be16_to_cpu(bf[0].length) >= be16_to_cpu(bf[1].length)); - ASSERT(be16_to_cpu(bf[1].length) >= be16_to_cpu(bf[2].length)); + + XFS_WANT_CORRUPTED_RETURN(be16_to_cpu(bf[0].length) >= + be16_to_cpu(bf[1].length)); + XFS_WANT_CORRUPTED_RETURN(be16_to_cpu(bf[1].length) >= + be16_to_cpu(bf[2].length)); /* * Loop over the data/unused entries. */ @@ -107,17 +114,20 @@ xfs_dir2_data_check( * doesn't need to be there. */ if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { - ASSERT(lastfree == 0); - ASSERT(be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup)) == - (char *)dup - (char *)hdr); + XFS_WANT_CORRUPTED_RETURN(lastfree == 0); + XFS_WANT_CORRUPTED_RETURN( + be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup)) == + (char *)dup - (char *)hdr); dfp = xfs_dir2_data_freefind(hdr, dup); if (dfp) { i = (int)(dfp - bf); - ASSERT((freeseen & (1 << i)) == 0); + XFS_WANT_CORRUPTED_RETURN( + (freeseen & (1 << i)) == 0); freeseen |= 1 << i; } else { - ASSERT(be16_to_cpu(dup->length) <= - be16_to_cpu(bf[2].length)); + XFS_WANT_CORRUPTED_RETURN( + be16_to_cpu(dup->length) <= + be16_to_cpu(bf[2].length)); } p += be16_to_cpu(dup->length); lastfree = 1; @@ -130,10 +140,12 @@ xfs_dir2_data_check( * The linear search is crude but this is DEBUG code. */ dep = (xfs_dir2_data_entry_t *)p; - ASSERT(dep->namelen != 0); - ASSERT(xfs_dir_ino_validate(mp, be64_to_cpu(dep->inumber)) == 0); - ASSERT(be16_to_cpu(*xfs_dir2_data_entry_tag_p(dep)) == - (char *)dep - (char *)hdr); + XFS_WANT_CORRUPTED_RETURN(dep->namelen != 0); + XFS_WANT_CORRUPTED_RETURN( + !xfs_dir_ino_validate(mp, be64_to_cpu(dep->inumber))); + XFS_WANT_CORRUPTED_RETURN( + be16_to_cpu(*xfs_dir2_data_entry_tag_p(dep)) == + (char *)dep - (char *)hdr); count++; lastfree = 0; if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC)) { @@ -148,27 +160,122 @@ xfs_dir2_data_check( be32_to_cpu(lep[i].hashval) == hash) break; } - ASSERT(i < be32_to_cpu(btp->count)); + XFS_WANT_CORRUPTED_RETURN(i < be32_to_cpu(btp->count)); } p += xfs_dir2_data_entsize(dep->namelen); } /* * Need to have seen all the entries and all the bestfree slots. */ - ASSERT(freeseen == 7); + XFS_WANT_CORRUPTED_RETURN(freeseen == 7); if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC)) { for (i = stale = 0; i < be32_to_cpu(btp->count); i++) { if (lep[i].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) stale++; if (i > 0) - ASSERT(be32_to_cpu(lep[i].hashval) >= be32_to_cpu(lep[i - 1].hashval)); + XFS_WANT_CORRUPTED_RETURN( + be32_to_cpu(lep[i].hashval) >= + be32_to_cpu(lep[i - 1].hashval)); } - ASSERT(count == be32_to_cpu(btp->count) - be32_to_cpu(btp->stale)); - ASSERT(stale == be32_to_cpu(btp->stale)); + XFS_WANT_CORRUPTED_RETURN(count == + be32_to_cpu(btp->count) - be32_to_cpu(btp->stale)); + XFS_WANT_CORRUPTED_RETURN(stale == be32_to_cpu(btp->stale)); } + return 0; +} + +static void +xfs_dir2_data_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_dir2_data_hdr *hdr = bp->b_addr; + int block_ok = 0; + + block_ok = hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC); + block_ok = block_ok && __xfs_dir2_data_check(NULL, bp) == 0; + + if (!block_ok) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +/* + * Readahead of the first block of the directory when it is opened is completely + * oblivious to the format of the directory. Hence we can either get a block + * format buffer or a data format buffer on readahead. + */ +static void +xfs_dir2_data_reada_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_dir2_data_hdr *hdr = bp->b_addr; + + switch (hdr->magic) { + case cpu_to_be32(XFS_DIR2_BLOCK_MAGIC): + bp->b_ops = &xfs_dir2_block_buf_ops; + bp->b_ops->verify_read(bp); + return; + case cpu_to_be32(XFS_DIR2_DATA_MAGIC): + xfs_dir2_data_verify(bp); + return; + default: + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + break; + } +} + +static void +xfs_dir2_data_read_verify( + struct xfs_buf *bp) +{ + xfs_dir2_data_verify(bp); +} + +static void +xfs_dir2_data_write_verify( + struct xfs_buf *bp) +{ + xfs_dir2_data_verify(bp); +} + +const struct xfs_buf_ops xfs_dir2_data_buf_ops = { + .verify_read = xfs_dir2_data_read_verify, + .verify_write = xfs_dir2_data_write_verify, +}; + +static const struct xfs_buf_ops xfs_dir2_data_reada_buf_ops = { + .verify_read = xfs_dir2_data_reada_verify, + .verify_write = xfs_dir2_data_write_verify, +}; + + +int +xfs_dir2_data_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t bno, + xfs_daddr_t mapped_bno, + struct xfs_buf **bpp) +{ + return xfs_da_read_buf(tp, dp, bno, mapped_bno, bpp, + XFS_DATA_FORK, &xfs_dir2_data_buf_ops); +} + +int +xfs_dir2_data_readahead( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t bno, + xfs_daddr_t mapped_bno) +{ + return xfs_da_reada_buf(tp, dp, bno, mapped_bno, + XFS_DATA_FORK, &xfs_dir2_data_reada_buf_ops); } -#endif /* * Given a data block and an unused entry from that block, @@ -409,10 +516,9 @@ xfs_dir2_data_init( */ error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, blkno), -1, &bp, XFS_DATA_FORK); - if (error) { + if (error) return error; - } - ASSERT(bp != NULL); + bp->b_ops = &xfs_dir2_data_buf_ops; /* * Initialize the header. diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c index 0b296253bd0..60cd2fa4e04 100644 --- a/fs/xfs/xfs_dir2_leaf.c +++ b/fs/xfs/xfs_dir2_leaf.c @@ -48,6 +48,83 @@ static void xfs_dir2_leaf_log_bests(struct xfs_trans *tp, struct xfs_buf *bp, int first, int last); static void xfs_dir2_leaf_log_tail(struct xfs_trans *tp, struct xfs_buf *bp); +static void +xfs_dir2_leaf_verify( + struct xfs_buf *bp, + __be16 magic) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_dir2_leaf_hdr *hdr = bp->b_addr; + int block_ok = 0; + + block_ok = hdr->info.magic == magic; + if (!block_ok) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +static void +xfs_dir2_leaf1_read_verify( + struct xfs_buf *bp) +{ + xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC)); +} + +static void +xfs_dir2_leaf1_write_verify( + struct xfs_buf *bp) +{ + xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC)); +} + +void +xfs_dir2_leafn_read_verify( + struct xfs_buf *bp) +{ + xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAFN_MAGIC)); +} + +void +xfs_dir2_leafn_write_verify( + struct xfs_buf *bp) +{ + xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAFN_MAGIC)); +} + +static const struct xfs_buf_ops xfs_dir2_leaf1_buf_ops = { + .verify_read = xfs_dir2_leaf1_read_verify, + .verify_write = xfs_dir2_leaf1_write_verify, +}; + +const struct xfs_buf_ops xfs_dir2_leafn_buf_ops = { + .verify_read = xfs_dir2_leafn_read_verify, + .verify_write = xfs_dir2_leafn_write_verify, +}; + +static int +xfs_dir2_leaf_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t fbno, + xfs_daddr_t mappedbno, + struct xfs_buf **bpp) +{ + return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp, + XFS_DATA_FORK, &xfs_dir2_leaf1_buf_ops); +} + +int +xfs_dir2_leafn_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t fbno, + xfs_daddr_t mappedbno, + struct xfs_buf **bpp) +{ + return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp, + XFS_DATA_FORK, &xfs_dir2_leafn_buf_ops); +} /* * Convert a block form directory to a leaf form directory. @@ -125,6 +202,7 @@ xfs_dir2_block_to_leaf( /* * Fix up the block header, make it a data block. */ + dbp->b_ops = &xfs_dir2_data_buf_ops; hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC); if (needscan) xfs_dir2_data_freescan(mp, hdr, &needlog); @@ -311,15 +389,11 @@ xfs_dir2_leaf_addname( dp = args->dp; tp = args->trans; mp = dp->i_mount; - /* - * Read the leaf block. - */ - error = xfs_da_read_buf(tp, dp, mp->m_dirleafblk, -1, &lbp, - XFS_DATA_FORK); - if (error) { + + error = xfs_dir2_leaf_read(tp, dp, mp->m_dirleafblk, -1, &lbp); + if (error) return error; - } - ASSERT(lbp != NULL); + /* * Look up the entry by hash value and name. * We know it's not there, our caller has already done a lookup. @@ -494,22 +568,21 @@ xfs_dir2_leaf_addname( hdr = dbp->b_addr; bestsp[use_block] = hdr->bestfree[0].length; grown = 1; - } - /* - * Already had space in some data block. - * Just read that one in. - */ - else { - if ((error = - xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, use_block), - -1, &dbp, XFS_DATA_FORK))) { + } else { + /* + * Already had space in some data block. + * Just read that one in. + */ + error = xfs_dir2_data_read(tp, dp, + xfs_dir2_db_to_da(mp, use_block), + -1, &dbp); + if (error) { xfs_trans_brelse(tp, lbp); return error; } hdr = dbp->b_addr; grown = 0; } - xfs_dir2_data_check(dp, dbp); /* * Point to the biggest freespace in our data block. */ @@ -892,10 +965,9 @@ xfs_dir2_leaf_readbuf( * Read the directory block starting at the first mapping. */ mip->curdb = xfs_dir2_da_to_db(mp, map->br_startoff); - error = xfs_da_read_buf(NULL, dp, map->br_startoff, + error = xfs_dir2_data_read(NULL, dp, map->br_startoff, map->br_blockcount >= mp->m_dirblkfsbs ? - XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1, - &bp, XFS_DATA_FORK); + XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1, &bp); /* * Should just skip over the data block instead of giving up. @@ -922,11 +994,11 @@ xfs_dir2_leaf_readbuf( */ if (i > mip->ra_current && map[mip->ra_index].br_blockcount >= mp->m_dirblkfsbs) { - xfs_buf_readahead(mp->m_ddev_targp, + xfs_dir2_data_readahead(NULL, dp, + map[mip->ra_index].br_startoff + mip->ra_offset, XFS_FSB_TO_DADDR(mp, map[mip->ra_index].br_startblock + - mip->ra_offset), - (int)BTOBB(mp->m_dirblksize)); + mip->ra_offset)); mip->ra_current = i; } @@ -935,10 +1007,9 @@ xfs_dir2_leaf_readbuf( * use our mapping, but this is a very rare case. */ else if (i > mip->ra_current) { - xfs_da_reada_buf(NULL, dp, + xfs_dir2_data_readahead(NULL, dp, map[mip->ra_index].br_startoff + - mip->ra_offset, - XFS_DATA_FORK); + mip->ra_offset, -1); mip->ra_current = i; } @@ -1177,15 +1248,14 @@ xfs_dir2_leaf_init( * Get the buffer for the block. */ error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, bno), -1, &bp, - XFS_DATA_FORK); - if (error) { + XFS_DATA_FORK); + if (error) return error; - } - ASSERT(bp != NULL); - leaf = bp->b_addr; + /* * Initialize the header. */ + leaf = bp->b_addr; leaf->hdr.info.magic = cpu_to_be16(magic); leaf->hdr.info.forw = 0; leaf->hdr.info.back = 0; @@ -1198,10 +1268,12 @@ xfs_dir2_leaf_init( * the block. */ if (magic == XFS_DIR2_LEAF1_MAGIC) { + bp->b_ops = &xfs_dir2_leaf1_buf_ops; ltp = xfs_dir2_leaf_tail_p(mp, leaf); ltp->bestcount = 0; xfs_dir2_leaf_log_tail(tp, bp); - } + } else + bp->b_ops = &xfs_dir2_leafn_buf_ops; *bpp = bp; return 0; } @@ -1372,13 +1444,11 @@ xfs_dir2_leaf_lookup_int( dp = args->dp; tp = args->trans; mp = dp->i_mount; - /* - * Read the leaf block into the buffer. - */ - error = xfs_da_read_buf(tp, dp, mp->m_dirleafblk, -1, &lbp, - XFS_DATA_FORK); + + error = xfs_dir2_leaf_read(tp, dp, mp->m_dirleafblk, -1, &lbp); if (error) return error; + *lbpp = lbp; leaf = lbp->b_addr; xfs_dir2_leaf_check(dp, lbp); @@ -1409,14 +1479,13 @@ xfs_dir2_leaf_lookup_int( if (newdb != curdb) { if (dbp) xfs_trans_brelse(tp, dbp); - error = xfs_da_read_buf(tp, dp, - xfs_dir2_db_to_da(mp, newdb), - -1, &dbp, XFS_DATA_FORK); + error = xfs_dir2_data_read(tp, dp, + xfs_dir2_db_to_da(mp, newdb), + -1, &dbp); if (error) { xfs_trans_brelse(tp, lbp); return error; } - xfs_dir2_data_check(dp, dbp); curdb = newdb; } /* @@ -1451,9 +1520,9 @@ xfs_dir2_leaf_lookup_int( ASSERT(cidb != -1); if (cidb != curdb) { xfs_trans_brelse(tp, dbp); - error = xfs_da_read_buf(tp, dp, - xfs_dir2_db_to_da(mp, cidb), - -1, &dbp, XFS_DATA_FORK); + error = xfs_dir2_data_read(tp, dp, + xfs_dir2_db_to_da(mp, cidb), + -1, &dbp); if (error) { xfs_trans_brelse(tp, lbp); return error; @@ -1738,10 +1807,9 @@ xfs_dir2_leaf_trim_data( /* * Read the offending data block. We need its buffer. */ - if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp, - XFS_DATA_FORK))) { + error = xfs_dir2_data_read(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp); + if (error) return error; - } leaf = lbp->b_addr; ltp = xfs_dir2_leaf_tail_p(mp, leaf); @@ -1864,10 +1932,9 @@ xfs_dir2_node_to_leaf( /* * Read the freespace block. */ - if ((error = xfs_da_read_buf(tp, dp, mp->m_dirfreeblk, -1, &fbp, - XFS_DATA_FORK))) { + error = xfs_dir2_free_read(tp, dp, mp->m_dirfreeblk, &fbp); + if (error) return error; - } free = fbp->b_addr; ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC)); ASSERT(!free->hdr.firstdb); @@ -1890,7 +1957,10 @@ xfs_dir2_node_to_leaf( xfs_dir2_leaf_compact(args, lbp); else xfs_dir2_leaf_log_header(tp, lbp); + + lbp->b_ops = &xfs_dir2_leaf1_buf_ops; leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAF1_MAGIC); + /* * Set up the leaf tail from the freespace block. */ diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c index 6c705240660..5980f9b7fa9 100644 --- a/fs/xfs/xfs_dir2_node.c +++ b/fs/xfs/xfs_dir2_node.c @@ -55,6 +55,74 @@ static int xfs_dir2_leafn_remove(xfs_da_args_t *args, struct xfs_buf *bp, static int xfs_dir2_node_addname_int(xfs_da_args_t *args, xfs_da_state_blk_t *fblk); +static void +xfs_dir2_free_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_dir2_free_hdr *hdr = bp->b_addr; + int block_ok = 0; + + block_ok = hdr->magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC); + if (!block_ok) { + XFS_CORRUPTION_ERROR("xfs_dir2_free_verify magic", + XFS_ERRLEVEL_LOW, mp, hdr); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +static void +xfs_dir2_free_read_verify( + struct xfs_buf *bp) +{ + xfs_dir2_free_verify(bp); +} + +static void +xfs_dir2_free_write_verify( + struct xfs_buf *bp) +{ + xfs_dir2_free_verify(bp); +} + +static const struct xfs_buf_ops xfs_dir2_free_buf_ops = { + .verify_read = xfs_dir2_free_read_verify, + .verify_write = xfs_dir2_free_write_verify, +}; + + +static int +__xfs_dir2_free_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t fbno, + xfs_daddr_t mappedbno, + struct xfs_buf **bpp) +{ + return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp, + XFS_DATA_FORK, &xfs_dir2_free_buf_ops); +} + +int +xfs_dir2_free_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t fbno, + struct xfs_buf **bpp) +{ + return __xfs_dir2_free_read(tp, dp, fbno, -1, bpp); +} + +static int +xfs_dir2_free_try_read( + struct xfs_trans *tp, + struct xfs_inode *dp, + xfs_dablk_t fbno, + struct xfs_buf **bpp) +{ + return __xfs_dir2_free_read(tp, dp, fbno, -2, bpp); +} + /* * Log entries from a freespace block. */ @@ -131,11 +199,12 @@ xfs_dir2_leaf_to_node( /* * Get the buffer for the new freespace block. */ - if ((error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), -1, &fbp, - XFS_DATA_FORK))) { + error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), -1, &fbp, + XFS_DATA_FORK); + if (error) return error; - } - ASSERT(fbp != NULL); + fbp->b_ops = &xfs_dir2_free_buf_ops; + free = fbp->b_addr; leaf = lbp->b_addr; ltp = xfs_dir2_leaf_tail_p(mp, leaf); @@ -157,7 +226,10 @@ xfs_dir2_leaf_to_node( *to = cpu_to_be16(off); } free->hdr.nused = cpu_to_be32(n); + + lbp->b_ops = &xfs_dir2_leafn_buf_ops; leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAFN_MAGIC); + /* * Log everything. */ @@ -394,12 +466,10 @@ xfs_dir2_leafn_lookup_for_addname( */ if (curbp) xfs_trans_brelse(tp, curbp); - /* - * Read the free block. - */ - error = xfs_da_read_buf(tp, dp, + + error = xfs_dir2_free_read(tp, dp, xfs_dir2_db_to_da(mp, newfdb), - -1, &curbp, XFS_DATA_FORK); + &curbp); if (error) return error; free = curbp->b_addr; @@ -534,9 +604,9 @@ xfs_dir2_leafn_lookup_for_entry( ASSERT(state->extravalid); curbp = state->extrablk.bp; } else { - error = xfs_da_read_buf(tp, dp, + error = xfs_dir2_data_read(tp, dp, xfs_dir2_db_to_da(mp, newdb), - -1, &curbp, XFS_DATA_FORK); + -1, &curbp); if (error) return error; } @@ -568,6 +638,7 @@ xfs_dir2_leafn_lookup_for_entry( state->extrablk.index = (int)((char *)dep - (char *)curbp->b_addr); state->extrablk.magic = XFS_DIR2_DATA_MAGIC; + curbp->b_ops = &xfs_dir2_data_buf_ops; if (cmp == XFS_CMP_EXACT) return XFS_ERROR(EEXIST); } @@ -582,6 +653,7 @@ xfs_dir2_leafn_lookup_for_entry( state->extrablk.index = -1; state->extrablk.blkno = curdb; state->extrablk.magic = XFS_DIR2_DATA_MAGIC; + curbp->b_ops = &xfs_dir2_data_buf_ops; } else { /* If the curbp is not the CI match block, drop it */ if (state->extrablk.bp != curbp) @@ -825,6 +897,77 @@ xfs_dir2_leafn_rebalance( } } +static int +xfs_dir2_data_block_free( + xfs_da_args_t *args, + struct xfs_dir2_data_hdr *hdr, + struct xfs_dir2_free *free, + xfs_dir2_db_t fdb, + int findex, + struct xfs_buf *fbp, + int longest) +{ + struct xfs_trans *tp = args->trans; + int logfree = 0; + + if (!hdr) { + /* One less used entry in the free table. */ + be32_add_cpu(&free->hdr.nused, -1); + xfs_dir2_free_log_header(tp, fbp); + + /* + * If this was the last entry in the table, we can trim the + * table size back. There might be other entries at the end + * referring to non-existent data blocks, get those too. + */ + if (findex == be32_to_cpu(free->hdr.nvalid) - 1) { + int i; /* free entry index */ + + for (i = findex - 1; i >= 0; i--) { + if (free->bests[i] != cpu_to_be16(NULLDATAOFF)) + break; + } + free->hdr.nvalid = cpu_to_be32(i + 1); + logfree = 0; + } else { + /* Not the last entry, just punch it out. */ + free->bests[findex] = cpu_to_be16(NULLDATAOFF); + logfree = 1; + } + /* + * If there are no useful entries left in the block, + * get rid of the block if we can. + */ + if (!free->hdr.nused) { + int error; + + error = xfs_dir2_shrink_inode(args, fdb, fbp); + if (error == 0) { + fbp = NULL; + logfree = 0; + } else if (error != ENOSPC || args->total != 0) + return error; + /* + * It's possible to get ENOSPC if there is no + * space reservation. In this case some one + * else will eventually get rid of this block. + */ + } + } else { + /* + * Data block is not empty, just set the free entry to the new + * value. + */ + free->bests[findex] = cpu_to_be16(longest); + logfree = 1; + } + + /* Log the free entry that changed, unless we got rid of it. */ + if (logfree) + xfs_dir2_free_log_bests(tp, fbp, findex, findex); + return 0; +} + /* * Remove an entry from a node directory. * This removes the leaf entry and the data entry, @@ -908,17 +1051,16 @@ xfs_dir2_leafn_remove( xfs_dir2_db_t fdb; /* freeblock block number */ int findex; /* index in freeblock entries */ xfs_dir2_free_t *free; /* freeblock structure */ - int logfree; /* need to log free entry */ /* * Convert the data block number to a free block, * read in the free block. */ fdb = xfs_dir2_db_to_fdb(mp, db); - if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), - -1, &fbp, XFS_DATA_FORK))) { + error = xfs_dir2_free_read(tp, dp, xfs_dir2_db_to_da(mp, fdb), + &fbp); + if (error) return error; - } free = fbp->b_addr; ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC)); ASSERT(be32_to_cpu(free->hdr.firstdb) == @@ -954,68 +1096,12 @@ xfs_dir2_leafn_remove( * If we got rid of the data block, we can eliminate that entry * in the free block. */ - if (hdr == NULL) { - /* - * One less used entry in the free table. - */ - be32_add_cpu(&free->hdr.nused, -1); - xfs_dir2_free_log_header(tp, fbp); - /* - * If this was the last entry in the table, we can - * trim the table size back. There might be other - * entries at the end referring to non-existent - * data blocks, get those too. - */ - if (findex == be32_to_cpu(free->hdr.nvalid) - 1) { - int i; /* free entry index */ - - for (i = findex - 1; - i >= 0 && - free->bests[i] == cpu_to_be16(NULLDATAOFF); - i--) - continue; - free->hdr.nvalid = cpu_to_be32(i + 1); - logfree = 0; - } - /* - * Not the last entry, just punch it out. - */ - else { - free->bests[findex] = cpu_to_be16(NULLDATAOFF); - logfree = 1; - } - /* - * If there are no useful entries left in the block, - * get rid of the block if we can. - */ - if (!free->hdr.nused) { - error = xfs_dir2_shrink_inode(args, fdb, fbp); - if (error == 0) { - fbp = NULL; - logfree = 0; - } else if (error != ENOSPC || args->total != 0) - return error; - /* - * It's possible to get ENOSPC if there is no - * space reservation. In this case some one - * else will eventually get rid of this block. - */ - } - } - /* - * Data block is not empty, just set the free entry to - * the new value. - */ - else { - free->bests[findex] = cpu_to_be16(longest); - logfree = 1; - } - /* - * Log the free entry that changed, unless we got rid of it. - */ - if (logfree) - xfs_dir2_free_log_bests(tp, fbp, findex, findex); + error = xfs_dir2_data_block_free(args, hdr, free, + fdb, findex, fbp, longest); + if (error) + return error; } + xfs_dir2_leafn_check(dp, bp); /* * Return indication of whether this leaf block is empty enough @@ -1169,12 +1255,11 @@ xfs_dir2_leafn_toosmall( /* * Read the sibling leaf block. */ - if ((error = - xfs_da_read_buf(state->args->trans, state->args->dp, blkno, - -1, &bp, XFS_DATA_FORK))) { + error = xfs_dir2_leafn_read(state->args->trans, state->args->dp, + blkno, -1, &bp); + if (error) return error; - } - ASSERT(bp != NULL); + /* * Count bytes in the two blocks combined. */ @@ -1454,14 +1539,13 @@ xfs_dir2_node_addname_int( * This should be really rare, so there's no reason * to avoid it. */ - if ((error = xfs_da_read_buf(tp, dp, - xfs_dir2_db_to_da(mp, fbno), -2, &fbp, - XFS_DATA_FORK))) { + error = xfs_dir2_free_try_read(tp, dp, + xfs_dir2_db_to_da(mp, fbno), + &fbp); + if (error) return error; - } - if (unlikely(fbp == NULL)) { + if (!fbp) continue; - } free = fbp->b_addr; ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC)); findex = 0; @@ -1520,9 +1604,10 @@ xfs_dir2_node_addname_int( * that was just allocated. */ fbno = xfs_dir2_db_to_fdb(mp, dbno); - if (unlikely(error = xfs_da_read_buf(tp, dp, - xfs_dir2_db_to_da(mp, fbno), -2, &fbp, - XFS_DATA_FORK))) + error = xfs_dir2_free_try_read(tp, dp, + xfs_dir2_db_to_da(mp, fbno), + &fbp); + if (error) return error; /* @@ -1561,12 +1646,12 @@ xfs_dir2_node_addname_int( /* * Get a buffer for the new block. */ - if ((error = xfs_da_get_buf(tp, dp, - xfs_dir2_db_to_da(mp, fbno), - -1, &fbp, XFS_DATA_FORK))) { + error = xfs_da_get_buf(tp, dp, + xfs_dir2_db_to_da(mp, fbno), + -1, &fbp, XFS_DATA_FORK); + if (error) return error; - } - ASSERT(fbp != NULL); + fbp->b_ops = &xfs_dir2_free_buf_ops; /* * Initialize the new block to be empty, and remember @@ -1630,8 +1715,8 @@ xfs_dir2_node_addname_int( /* * Read the data block in. */ - error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, dbno), - -1, &dbp, XFS_DATA_FORK); + error = xfs_dir2_data_read(tp, dp, xfs_dir2_db_to_da(mp, dbno), + -1, &dbp); if (error) return error; hdr = dbp->b_addr; @@ -1917,18 +2002,15 @@ xfs_dir2_node_trim_free( /* * Read the freespace block. */ - if (unlikely(error = xfs_da_read_buf(tp, dp, (xfs_dablk_t)fo, -2, &bp, - XFS_DATA_FORK))) { + error = xfs_dir2_free_try_read(tp, dp, fo, &bp); + if (error) return error; - } - /* * There can be holes in freespace. If fo is a hole, there's * nothing to do. */ - if (bp == NULL) { + if (!bp) return 0; - } free = bp->b_addr; ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC)); /* diff --git a/fs/xfs/xfs_dir2_priv.h b/fs/xfs/xfs_dir2_priv.h index 3523d3e15aa..7da79f6515f 100644 --- a/fs/xfs/xfs_dir2_priv.h +++ b/fs/xfs/xfs_dir2_priv.h @@ -30,6 +30,8 @@ extern int xfs_dir_cilookup_result(struct xfs_da_args *args, const unsigned char *name, int len); /* xfs_dir2_block.c */ +extern const struct xfs_buf_ops xfs_dir2_block_buf_ops; + extern int xfs_dir2_block_addname(struct xfs_da_args *args); extern int xfs_dir2_block_getdents(struct xfs_inode *dp, void *dirent, xfs_off_t *offset, filldir_t filldir); @@ -41,10 +43,19 @@ extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args, /* xfs_dir2_data.c */ #ifdef DEBUG -extern void xfs_dir2_data_check(struct xfs_inode *dp, struct xfs_buf *bp); +#define xfs_dir2_data_check(dp,bp) __xfs_dir2_data_check(dp, bp); #else #define xfs_dir2_data_check(dp,bp) #endif + +extern const struct xfs_buf_ops xfs_dir2_data_buf_ops; + +extern int __xfs_dir2_data_check(struct xfs_inode *dp, struct xfs_buf *bp); +extern int xfs_dir2_data_read(struct xfs_trans *tp, struct xfs_inode *dp, + xfs_dablk_t bno, xfs_daddr_t mapped_bno, struct xfs_buf **bpp); +extern int xfs_dir2_data_readahead(struct xfs_trans *tp, struct xfs_inode *dp, + xfs_dablk_t bno, xfs_daddr_t mapped_bno); + extern struct xfs_dir2_data_free * xfs_dir2_data_freeinsert(struct xfs_dir2_data_hdr *hdr, struct xfs_dir2_data_unused *dup, int *loghead); @@ -66,6 +77,10 @@ extern void xfs_dir2_data_use_free(struct xfs_trans *tp, struct xfs_buf *bp, xfs_dir2_data_aoff_t len, int *needlogp, int *needscanp); /* xfs_dir2_leaf.c */ +extern const struct xfs_buf_ops xfs_dir2_leafn_buf_ops; + +extern int xfs_dir2_leafn_read(struct xfs_trans *tp, struct xfs_inode *dp, + xfs_dablk_t fbno, xfs_daddr_t mappedbno, struct xfs_buf **bpp); extern int xfs_dir2_block_to_leaf(struct xfs_da_args *args, struct xfs_buf *dbp); extern int xfs_dir2_leaf_addname(struct xfs_da_args *args); @@ -115,6 +130,8 @@ extern int xfs_dir2_node_removename(struct xfs_da_args *args); extern int xfs_dir2_node_replace(struct xfs_da_args *args); extern int xfs_dir2_node_trim_free(struct xfs_da_args *args, xfs_fileoff_t fo, int *rvalp); +extern int xfs_dir2_free_read(struct xfs_trans *tp, struct xfs_inode *dp, + xfs_dablk_t fbno, struct xfs_buf **bpp); /* xfs_dir2_sf.c */ extern xfs_ino_t xfs_dir2_sf_get_parent_ino(struct xfs_dir2_sf_hdr *sfp); diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c index bf27fcca484..9e1bf5294c9 100644 --- a/fs/xfs/xfs_dquot.c +++ b/fs/xfs/xfs_dquot.c @@ -248,7 +248,59 @@ xfs_qm_init_dquot_blk( xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1); } +static void +xfs_dquot_buf_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr; + struct xfs_disk_dquot *ddq; + xfs_dqid_t id = 0; + int i; + + /* + * On the first read of the buffer, verify that each dquot is valid. + * We don't know what the id of the dquot is supposed to be, just that + * they should be increasing monotonically within the buffer. If the + * first id is corrupt, then it will fail on the second dquot in the + * buffer so corruptions could point to the wrong dquot in this case. + */ + for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) { + int error; + + ddq = &d[i].dd_diskdq; + + if (i == 0) + id = be32_to_cpu(ddq->d_id); + + error = xfs_qm_dqcheck(mp, ddq, id + i, 0, XFS_QMOPT_DOWARN, + "xfs_dquot_read_verify"); + if (error) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, d); + xfs_buf_ioerror(bp, EFSCORRUPTED); + break; + } + } +} + +static void +xfs_dquot_buf_read_verify( + struct xfs_buf *bp) +{ + xfs_dquot_buf_verify(bp); +} + +void +xfs_dquot_buf_write_verify( + struct xfs_buf *bp) +{ + xfs_dquot_buf_verify(bp); +} +const struct xfs_buf_ops xfs_dquot_buf_ops = { + .verify_read = xfs_dquot_buf_read_verify, + .verify_write = xfs_dquot_buf_write_verify, +}; /* * Allocate a block and fill it with dquots. @@ -315,6 +367,7 @@ xfs_qm_dqalloc( error = xfs_buf_geterror(bp); if (error) goto error1; + bp->b_ops = &xfs_dquot_buf_ops; /* * Make a chunk of dquots out of this buffer and log @@ -359,6 +412,51 @@ xfs_qm_dqalloc( return (error); } +STATIC int +xfs_qm_dqrepair( + struct xfs_mount *mp, + struct xfs_trans *tp, + struct xfs_dquot *dqp, + xfs_dqid_t firstid, + struct xfs_buf **bpp) +{ + int error; + struct xfs_disk_dquot *ddq; + struct xfs_dqblk *d; + int i; + + /* + * Read the buffer without verification so we get the corrupted + * buffer returned to us. make sure we verify it on write, though. + */ + error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, dqp->q_blkno, + mp->m_quotainfo->qi_dqchunklen, + 0, bpp, NULL); + + if (error) { + ASSERT(*bpp == NULL); + return XFS_ERROR(error); + } + (*bpp)->b_ops = &xfs_dquot_buf_ops; + + ASSERT(xfs_buf_islocked(*bpp)); + d = (struct xfs_dqblk *)(*bpp)->b_addr; + + /* Do the actual repair of dquots in this buffer */ + for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) { + ddq = &d[i].dd_diskdq; + error = xfs_qm_dqcheck(mp, ddq, firstid + i, + dqp->dq_flags & XFS_DQ_ALLTYPES, + XFS_QMOPT_DQREPAIR, "xfs_qm_dqrepair"); + if (error) { + /* repair failed, we're screwed */ + xfs_trans_brelse(tp, *bpp); + return XFS_ERROR(EIO); + } + } + + return 0; +} /* * Maps a dquot to the buffer containing its on-disk version. @@ -378,7 +476,6 @@ xfs_qm_dqtobp( xfs_buf_t *bp; xfs_inode_t *quotip = XFS_DQ_TO_QIP(dqp); xfs_mount_t *mp = dqp->q_mount; - xfs_disk_dquot_t *ddq; xfs_dqid_t id = be32_to_cpu(dqp->q_core.d_id); xfs_trans_t *tp = (tpp ? *tpp : NULL); @@ -439,33 +536,24 @@ xfs_qm_dqtobp( error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, dqp->q_blkno, mp->m_quotainfo->qi_dqchunklen, - 0, &bp); - if (error || !bp) - return XFS_ERROR(error); - } - - ASSERT(xfs_buf_islocked(bp)); + 0, &bp, &xfs_dquot_buf_ops); - /* - * calculate the location of the dquot inside the buffer. - */ - ddq = bp->b_addr + dqp->q_bufoffset; + if (error == EFSCORRUPTED && (flags & XFS_QMOPT_DQREPAIR)) { + xfs_dqid_t firstid = (xfs_dqid_t)map.br_startoff * + mp->m_quotainfo->qi_dqperchunk; + ASSERT(bp == NULL); + error = xfs_qm_dqrepair(mp, tp, dqp, firstid, &bp); + } - /* - * A simple sanity check in case we got a corrupted dquot... - */ - error = xfs_qm_dqcheck(mp, ddq, id, dqp->dq_flags & XFS_DQ_ALLTYPES, - flags & (XFS_QMOPT_DQREPAIR|XFS_QMOPT_DOWARN), - "dqtobp"); - if (error) { - if (!(flags & XFS_QMOPT_DQREPAIR)) { - xfs_trans_brelse(tp, bp); - return XFS_ERROR(EIO); + if (error) { + ASSERT(bp == NULL); + return XFS_ERROR(error); } } + ASSERT(xfs_buf_islocked(bp)); *O_bpp = bp; - *O_ddpp = ddq; + *O_ddpp = bp->b_addr + dqp->q_bufoffset; return (0); } @@ -920,7 +1008,7 @@ xfs_qm_dqflush( * Get the buffer containing the on-disk dquot */ error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dqp->q_blkno, - mp->m_quotainfo->qi_dqchunklen, 0, &bp); + mp->m_quotainfo->qi_dqchunklen, 0, &bp, NULL); if (error) goto out_unlock; diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h index 7d20af27346..c694a8469c4 100644 --- a/fs/xfs/xfs_dquot.h +++ b/fs/xfs/xfs_dquot.h @@ -161,4 +161,6 @@ static inline struct xfs_dquot *xfs_qm_dqhold(struct xfs_dquot *dqp) return dqp; } +extern const struct xfs_buf_ops xfs_dquot_buf_ops; + #endif /* __XFS_DQUOT_H__ */ diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c index 8c6d1d70278..a83611849ce 100644 --- a/fs/xfs/xfs_export.c +++ b/fs/xfs/xfs_export.c @@ -29,6 +29,7 @@ #include "xfs_inode.h" #include "xfs_inode_item.h" #include "xfs_trace.h" +#include "xfs_icache.h" /* * Note that we only accept fileids which are long enough rather than allow diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index aa473fa640a..67284edb84d 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -31,6 +31,8 @@ #include "xfs_error.h" #include "xfs_vnodeops.h" #include "xfs_da_btree.h" +#include "xfs_dir2_format.h" +#include "xfs_dir2_priv.h" #include "xfs_ioctl.h" #include "xfs_trace.h" @@ -84,7 +86,7 @@ xfs_rw_ilock_demote( * valid before the operation, it will be read from disk before * being partially zeroed. */ -STATIC int +int xfs_iozero( struct xfs_inode *ip, /* inode */ loff_t pos, /* offset in file */ @@ -255,15 +257,14 @@ xfs_file_aio_read( xfs_buftarg_t *target = XFS_IS_REALTIME_INODE(ip) ? mp->m_rtdev_targp : mp->m_ddev_targp; - if ((iocb->ki_pos & target->bt_smask) || - (size & target->bt_smask)) { - if (iocb->ki_pos == i_size_read(inode)) + if ((pos & target->bt_smask) || (size & target->bt_smask)) { + if (pos == i_size_read(inode)) return 0; return -XFS_ERROR(EINVAL); } } - n = mp->m_super->s_maxbytes - iocb->ki_pos; + n = mp->m_super->s_maxbytes - pos; if (n <= 0 || size == 0) return 0; @@ -289,20 +290,21 @@ xfs_file_aio_read( xfs_rw_ilock(ip, XFS_IOLOCK_EXCL); if (inode->i_mapping->nrpages) { - ret = -xfs_flushinval_pages(ip, - (iocb->ki_pos & PAGE_CACHE_MASK), - -1, FI_REMAPF_LOCKED); + ret = -filemap_write_and_wait_range( + VFS_I(ip)->i_mapping, + pos, -1); if (ret) { xfs_rw_iunlock(ip, XFS_IOLOCK_EXCL); return ret; } + truncate_pagecache_range(VFS_I(ip), pos, -1); } xfs_rw_ilock_demote(ip, XFS_IOLOCK_EXCL); } - trace_xfs_file_read(ip, size, iocb->ki_pos, ioflags); + trace_xfs_file_read(ip, size, pos, ioflags); - ret = generic_file_aio_read(iocb, iovp, nr_segs, iocb->ki_pos); + ret = generic_file_aio_read(iocb, iovp, nr_segs, pos); if (ret > 0) XFS_STATS_ADD(xs_read_bytes, ret); @@ -670,10 +672,11 @@ xfs_file_dio_aio_write( goto out; if (mapping->nrpages) { - ret = -xfs_flushinval_pages(ip, (pos & PAGE_CACHE_MASK), -1, - FI_REMAPF_LOCKED); + ret = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, + pos, -1); if (ret) goto out; + truncate_pagecache_range(VFS_I(ip), pos, -1); } /* @@ -728,16 +731,17 @@ xfs_file_buffered_aio_write( write_retry: trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, 0); ret = generic_file_buffered_write(iocb, iovp, nr_segs, - pos, &iocb->ki_pos, count, ret); + pos, &iocb->ki_pos, count, 0); + /* - * if we just got an ENOSPC, flush the inode now we aren't holding any - * page locks and retry *once* + * If we just got an ENOSPC, try to write back all dirty inodes to + * convert delalloc space to free up some of the excess reserved + * metadata space. */ if (ret == -ENOSPC && !enospc) { enospc = 1; - ret = -xfs_flush_pages(ip, 0, -1, 0, FI_NONE); - if (!ret) - goto write_retry; + xfs_flush_inodes(ip->i_mount); + goto write_retry; } current->backing_dev_info = NULL; @@ -889,7 +893,7 @@ xfs_dir_open( */ mode = xfs_ilock_map_shared(ip); if (ip->i_d.di_nextents > 0) - xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK); + xfs_dir2_data_readahead(NULL, ip, 0, -1); xfs_iunlock(ip, mode); return 0; } diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h index c13fed8c394..6dda3f949b0 100644 --- a/fs/xfs/xfs_fs.h +++ b/fs/xfs/xfs_fs.h @@ -233,7 +233,8 @@ typedef struct xfs_fsop_resblks { #define XFS_FSOP_GEOM_FLAGS_LOGV2 0x0100 /* log format version 2 */ #define XFS_FSOP_GEOM_FLAGS_SECTOR 0x0200 /* sector sizes >1BB */ #define XFS_FSOP_GEOM_FLAGS_ATTR2 0x0400 /* inline attributes rework */ -#define XFS_FSOP_GEOM_FLAGS_DIRV2CI 0x1000 /* ASCII only CI names */ +#define XFS_FSOP_GEOM_FLAGS_PROJID32 0x0800 /* 32-bit project IDs */ +#define XFS_FSOP_GEOM_FLAGS_DIRV2CI 0x1000 /* ASCII only CI names */ #define XFS_FSOP_GEOM_FLAGS_LAZYSB 0x4000 /* lazy superblock counters */ @@ -339,6 +340,35 @@ typedef struct xfs_error_injection { /* + * Speculative preallocation trimming. + */ +#define XFS_EOFBLOCKS_VERSION 1 +struct xfs_eofblocks { + __u32 eof_version; + __u32 eof_flags; + uid_t eof_uid; + gid_t eof_gid; + prid_t eof_prid; + __u32 pad32; + __u64 eof_min_file_size; + __u64 pad64[12]; +}; + +/* eof_flags values */ +#define XFS_EOF_FLAGS_SYNC (1 << 0) /* sync/wait mode scan */ +#define XFS_EOF_FLAGS_UID (1 << 1) /* filter by uid */ +#define XFS_EOF_FLAGS_GID (1 << 2) /* filter by gid */ +#define XFS_EOF_FLAGS_PRID (1 << 3) /* filter by project id */ +#define XFS_EOF_FLAGS_MINFILESIZE (1 << 4) /* filter by min file size */ +#define XFS_EOF_FLAGS_VALID \ + (XFS_EOF_FLAGS_SYNC | \ + XFS_EOF_FLAGS_UID | \ + XFS_EOF_FLAGS_GID | \ + XFS_EOF_FLAGS_PRID | \ + XFS_EOF_FLAGS_MINFILESIZE) + + +/* * The user-level Handle Request interface structure. */ typedef struct xfs_fsop_handlereq { @@ -456,6 +486,7 @@ typedef struct xfs_handle { /* XFS_IOC_GETBIOSIZE ---- deprecated 47 */ #define XFS_IOC_GETBMAPX _IOWR('X', 56, struct getbmap) #define XFS_IOC_ZERO_RANGE _IOW ('X', 57, struct xfs_flock64) +#define XFS_IOC_FREE_EOFBLOCKS _IOR ('X', 58, struct xfs_eofblocks) /* * ioctl commands that replace IRIX syssgi()'s diff --git a/fs/xfs/xfs_fs_subr.c b/fs/xfs/xfs_fs_subr.c deleted file mode 100644 index 652b875a9d4..00000000000 --- a/fs/xfs/xfs_fs_subr.c +++ /dev/null @@ -1,96 +0,0 @@ -/* - * Copyright (c) 2000-2002,2005-2006 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "xfs.h" -#include "xfs_vnodeops.h" -#include "xfs_bmap_btree.h" -#include "xfs_inode.h" -#include "xfs_trace.h" - -/* - * note: all filemap functions return negative error codes. These - * need to be inverted before returning to the xfs core functions. - */ -void -xfs_tosspages( - xfs_inode_t *ip, - xfs_off_t first, - xfs_off_t last, - int fiopt) -{ - /* can't toss partial tail pages, so mask them out */ - last &= ~(PAGE_SIZE - 1); - truncate_inode_pages_range(VFS_I(ip)->i_mapping, first, last - 1); -} - -int -xfs_flushinval_pages( - xfs_inode_t *ip, - xfs_off_t first, - xfs_off_t last, - int fiopt) -{ - struct address_space *mapping = VFS_I(ip)->i_mapping; - int ret = 0; - - trace_xfs_pagecache_inval(ip, first, last); - - xfs_iflags_clear(ip, XFS_ITRUNCATED); - ret = filemap_write_and_wait_range(mapping, first, - last == -1 ? LLONG_MAX : last); - if (!ret) - truncate_inode_pages_range(mapping, first, last); - return -ret; -} - -int -xfs_flush_pages( - xfs_inode_t *ip, - xfs_off_t first, - xfs_off_t last, - uint64_t flags, - int fiopt) -{ - struct address_space *mapping = VFS_I(ip)->i_mapping; - int ret = 0; - int ret2; - - xfs_iflags_clear(ip, XFS_ITRUNCATED); - ret = -filemap_fdatawrite_range(mapping, first, - last == -1 ? LLONG_MAX : last); - if (flags & XBF_ASYNC) - return ret; - ret2 = xfs_wait_on_pages(ip, first, last); - if (!ret) - ret = ret2; - return ret; -} - -int -xfs_wait_on_pages( - xfs_inode_t *ip, - xfs_off_t first, - xfs_off_t last) -{ - struct address_space *mapping = VFS_I(ip)->i_mapping; - - if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK)) { - return -filemap_fdatawait_range(mapping, first, - last == -1 ? XFS_ISIZE(ip) - 1 : last); - } - return 0; -} diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index c25b094efbf..94eaeedc549 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -97,7 +97,9 @@ xfs_fs_geometry( (xfs_sb_version_haslazysbcount(&mp->m_sb) ? XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) | (xfs_sb_version_hasattr2(&mp->m_sb) ? - XFS_FSOP_GEOM_FLAGS_ATTR2 : 0); + XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) | + (xfs_sb_version_hasprojid32bit(&mp->m_sb) ? + XFS_FSOP_GEOM_FLAGS_PROJID32 : 0); geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ? mp->m_sb.sb_logsectsize : BBSIZE; geo->rtsectsize = mp->m_sb.sb_blocksize; @@ -112,18 +114,40 @@ xfs_fs_geometry( return 0; } +static struct xfs_buf * +xfs_growfs_get_hdr_buf( + struct xfs_mount *mp, + xfs_daddr_t blkno, + size_t numblks, + int flags, + const struct xfs_buf_ops *ops) +{ + struct xfs_buf *bp; + + bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags); + if (!bp) + return NULL; + + xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); + bp->b_bn = blkno; + bp->b_maps[0].bm_bn = blkno; + bp->b_ops = ops; + + return bp; +} + static int xfs_growfs_data_private( xfs_mount_t *mp, /* mount point for filesystem */ xfs_growfs_data_t *in) /* growfs data input struct */ { xfs_agf_t *agf; + struct xfs_agfl *agfl; xfs_agi_t *agi; xfs_agnumber_t agno; xfs_extlen_t agsize; xfs_extlen_t tmpsize; xfs_alloc_rec_t *arec; - struct xfs_btree_block *block; xfs_buf_t *bp; int bucket; int dpct; @@ -146,9 +170,14 @@ xfs_growfs_data_private( dpct = pct - mp->m_sb.sb_imax_pct; bp = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1), - XFS_FSS_TO_BB(mp, 1), 0); + XFS_FSS_TO_BB(mp, 1), 0, NULL); if (!bp) return EIO; + if (bp->b_error) { + int error = bp->b_error; + xfs_buf_relse(bp); + return error; + } xfs_buf_relse(bp); new = nb; /* use new as a temporary here */ @@ -186,17 +215,18 @@ xfs_growfs_data_private( nfree = 0; for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { /* - * AG freelist header block + * AG freespace header block */ - bp = xfs_buf_get(mp->m_ddev_targp, - XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0); + bp = xfs_growfs_get_hdr_buf(mp, + XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)), + XFS_FSS_TO_BB(mp, 1), 0, + &xfs_agf_buf_ops); if (!bp) { error = ENOMEM; goto error0; } + agf = XFS_BUF_TO_AGF(bp); - memset(agf, 0, mp->m_sb.sb_sectsize); agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC); agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION); agf->agf_seqno = cpu_to_be32(agno); @@ -223,17 +253,39 @@ xfs_growfs_data_private( goto error0; /* + * AG freelist header block + */ + bp = xfs_growfs_get_hdr_buf(mp, + XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)), + XFS_FSS_TO_BB(mp, 1), 0, + &xfs_agfl_buf_ops); + if (!bp) { + error = ENOMEM; + goto error0; + } + + agfl = XFS_BUF_TO_AGFL(bp); + for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++) + agfl->agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK); + + error = xfs_bwrite(bp); + xfs_buf_relse(bp); + if (error) + goto error0; + + /* * AG inode header block */ - bp = xfs_buf_get(mp->m_ddev_targp, - XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0); + bp = xfs_growfs_get_hdr_buf(mp, + XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), + XFS_FSS_TO_BB(mp, 1), 0, + &xfs_agi_buf_ops); if (!bp) { error = ENOMEM; goto error0; } + agi = XFS_BUF_TO_AGI(bp); - memset(agi, 0, mp->m_sb.sb_sectsize); agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC); agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION); agi->agi_seqno = cpu_to_be32(agno); @@ -254,24 +306,22 @@ xfs_growfs_data_private( /* * BNO btree root block */ - bp = xfs_buf_get(mp->m_ddev_targp, - XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), - BTOBB(mp->m_sb.sb_blocksize), 0); + bp = xfs_growfs_get_hdr_buf(mp, + XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)), + BTOBB(mp->m_sb.sb_blocksize), 0, + &xfs_allocbt_buf_ops); + if (!bp) { error = ENOMEM; goto error0; } - block = XFS_BUF_TO_BLOCK(bp); - memset(block, 0, mp->m_sb.sb_blocksize); - block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC); - block->bb_level = 0; - block->bb_numrecs = cpu_to_be16(1); - block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); - block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); - arec = XFS_ALLOC_REC_ADDR(mp, block, 1); + + xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 0); + arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); arec->ar_blockcount = cpu_to_be32( agsize - be32_to_cpu(arec->ar_startblock)); + error = xfs_bwrite(bp); xfs_buf_relse(bp); if (error) @@ -280,25 +330,22 @@ xfs_growfs_data_private( /* * CNT btree root block */ - bp = xfs_buf_get(mp->m_ddev_targp, - XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), - BTOBB(mp->m_sb.sb_blocksize), 0); + bp = xfs_growfs_get_hdr_buf(mp, + XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)), + BTOBB(mp->m_sb.sb_blocksize), 0, + &xfs_allocbt_buf_ops); if (!bp) { error = ENOMEM; goto error0; } - block = XFS_BUF_TO_BLOCK(bp); - memset(block, 0, mp->m_sb.sb_blocksize); - block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC); - block->bb_level = 0; - block->bb_numrecs = cpu_to_be16(1); - block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); - block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); - arec = XFS_ALLOC_REC_ADDR(mp, block, 1); + + xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 0); + arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1); arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp)); arec->ar_blockcount = cpu_to_be32( agsize - be32_to_cpu(arec->ar_startblock)); nfree += be32_to_cpu(arec->ar_blockcount); + error = xfs_bwrite(bp); xfs_buf_relse(bp); if (error) @@ -307,20 +354,17 @@ xfs_growfs_data_private( /* * INO btree root block */ - bp = xfs_buf_get(mp->m_ddev_targp, - XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), - BTOBB(mp->m_sb.sb_blocksize), 0); + bp = xfs_growfs_get_hdr_buf(mp, + XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)), + BTOBB(mp->m_sb.sb_blocksize), 0, + &xfs_inobt_buf_ops); if (!bp) { error = ENOMEM; goto error0; } - block = XFS_BUF_TO_BLOCK(bp); - memset(block, 0, mp->m_sb.sb_blocksize); - block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC); - block->bb_level = 0; - block->bb_numrecs = 0; - block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK); - block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK); + + xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 0); + error = xfs_bwrite(bp); xfs_buf_relse(bp); if (error) @@ -399,9 +443,28 @@ xfs_growfs_data_private( /* update secondary superblocks. */ for (agno = 1; agno < nagcount; agno++) { - error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, + error = 0; + /* + * new secondary superblocks need to be zeroed, not read from + * disk as the contents of the new area we are growing into is + * completely unknown. + */ + if (agno < oagcount) { + error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, + XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), + XFS_FSS_TO_BB(mp, 1), 0, &bp, + &xfs_sb_buf_ops); + } else { + bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp, XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), - XFS_FSS_TO_BB(mp, 1), 0, &bp); + XFS_FSS_TO_BB(mp, 1), 0); + if (bp) { + bp->b_ops = &xfs_sb_buf_ops; + xfs_buf_zero(bp, 0, BBTOB(bp->b_length)); + } else + error = ENOMEM; + } + if (error) { xfs_warn(mp, "error %d reading secondary superblock for ag %d", @@ -409,6 +472,7 @@ xfs_growfs_data_private( break; } xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS); + /* * If we get an error writing out the alternate superblocks, * just issue a warning and continue. The real work is @@ -423,7 +487,7 @@ xfs_growfs_data_private( break; /* no point in continuing */ } } - return 0; + return error; error0: xfs_trans_cancel(tp, XFS_TRANS_ABORT); diff --git a/fs/xfs/xfs_globals.c b/fs/xfs/xfs_globals.c index 76e81cff70b..5399ef222dd 100644 --- a/fs/xfs/xfs_globals.c +++ b/fs/xfs/xfs_globals.c @@ -21,7 +21,8 @@ /* * Tunable XFS parameters. xfs_params is required even when CONFIG_SYSCTL=n, * other XFS code uses these values. Times are measured in centisecs (i.e. - * 100ths of a second). + * 100ths of a second) with the exception of eofb_timer, which is measured in + * seconds. */ xfs_param_t xfs_params = { /* MIN DFLT MAX */ @@ -40,4 +41,5 @@ xfs_param_t xfs_params = { .rotorstep = { 1, 1, 255 }, .inherit_nodfrg = { 0, 1, 1 }, .fstrm_timer = { 1, 30*100, 3600*100}, + .eofb_timer = { 1, 300, 3600*24}, }; diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index 445bf1aef31..a815412eab8 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -200,7 +200,8 @@ xfs_ialloc_inode_init( */ d = XFS_AGB_TO_DADDR(mp, agno, agbno + (j * blks_per_cluster)); fbuf = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, - mp->m_bsize * blks_per_cluster, 0); + mp->m_bsize * blks_per_cluster, + XBF_UNMAPPED); if (!fbuf) return ENOMEM; /* @@ -210,6 +211,7 @@ xfs_ialloc_inode_init( * to log a whole cluster of inodes instead of all the * individual transactions causing a lot of log traffic. */ + fbuf->b_ops = &xfs_inode_buf_ops; xfs_buf_zero(fbuf, 0, ninodes << mp->m_sb.sb_inodelog); for (i = 0; i < ninodes; i++) { int ioffset = i << mp->m_sb.sb_inodelog; @@ -250,6 +252,7 @@ xfs_ialloc_ag_alloc( /* boundary */ struct xfs_perag *pag; + memset(&args, 0, sizeof(args)); args.tp = tp; args.mp = tp->t_mountp; @@ -876,9 +879,9 @@ error0: * This function is designed to be called twice if it has to do an allocation * to make more free inodes. On the first call, *IO_agbp should be set to NULL. * If an inode is available without having to performn an allocation, an inode - * number is returned. In this case, *IO_agbp would be NULL. If an allocation - * needes to be done, xfs_dialloc would return the current AGI buffer in - * *IO_agbp. The caller should then commit the current transaction, allocate a + * number is returned. In this case, *IO_agbp is set to NULL. If an allocation + * needs to be done, xfs_dialloc returns the current AGI buffer in *IO_agbp. + * The caller should then commit the current transaction, allocate a * new transaction, and call xfs_dialloc() again, passing in the previous value * of *IO_agbp. IO_agbp should be held across the transactions. Since the AGI * buffer is locked across the two calls, the second call is guaranteed to have @@ -1471,6 +1474,57 @@ xfs_check_agi_unlinked( #define xfs_check_agi_unlinked(agi) #endif +static void +xfs_agi_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_agi *agi = XFS_BUF_TO_AGI(bp); + int agi_ok; + + /* + * Validate the magic number of the agi block. + */ + agi_ok = agi->agi_magicnum == cpu_to_be32(XFS_AGI_MAGIC) && + XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)); + + /* + * during growfs operations, the perag is not fully initialised, + * so we can't use it for any useful checking. growfs ensures we can't + * use it by using uncached buffers that don't have the perag attached + * so we can detect and avoid this problem. + */ + if (bp->b_pag) + agi_ok = agi_ok && be32_to_cpu(agi->agi_seqno) == + bp->b_pag->pag_agno; + + if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI, + XFS_RANDOM_IALLOC_READ_AGI))) { + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, agi); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } + xfs_check_agi_unlinked(agi); +} + +static void +xfs_agi_read_verify( + struct xfs_buf *bp) +{ + xfs_agi_verify(bp); +} + +static void +xfs_agi_write_verify( + struct xfs_buf *bp) +{ + xfs_agi_verify(bp); +} + +const struct xfs_buf_ops xfs_agi_buf_ops = { + .verify_read = xfs_agi_read_verify, + .verify_write = xfs_agi_write_verify, +}; + /* * Read in the allocation group header (inode allocation section) */ @@ -1481,38 +1535,18 @@ xfs_read_agi( xfs_agnumber_t agno, /* allocation group number */ struct xfs_buf **bpp) /* allocation group hdr buf */ { - struct xfs_agi *agi; /* allocation group header */ - int agi_ok; /* agi is consistent */ int error; ASSERT(agno != NULLAGNUMBER); error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), - XFS_FSS_TO_BB(mp, 1), 0, bpp); + XFS_FSS_TO_BB(mp, 1), 0, bpp, &xfs_agi_buf_ops); if (error) return error; ASSERT(!xfs_buf_geterror(*bpp)); - agi = XFS_BUF_TO_AGI(*bpp); - - /* - * Validate the magic number of the agi block. - */ - agi_ok = agi->agi_magicnum == cpu_to_be32(XFS_AGI_MAGIC) && - XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)) && - be32_to_cpu(agi->agi_seqno) == agno; - if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI, - XFS_RANDOM_IALLOC_READ_AGI))) { - XFS_CORRUPTION_ERROR("xfs_read_agi", XFS_ERRLEVEL_LOW, - mp, agi); - xfs_trans_brelse(tp, *bpp); - return XFS_ERROR(EFSCORRUPTED); - } - xfs_buf_set_ref(*bpp, XFS_AGI_REF); - - xfs_check_agi_unlinked(agi); return 0; } diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/xfs_ialloc.h index 1fd6ea4e9c9..c8da3df271e 100644 --- a/fs/xfs/xfs_ialloc.h +++ b/fs/xfs/xfs_ialloc.h @@ -147,7 +147,9 @@ int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino, /* * Get the data from the pointed-to record. */ -extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur, +int xfs_inobt_get_rec(struct xfs_btree_cur *cur, xfs_inobt_rec_incore_t *rec, int *stat); +extern const struct xfs_buf_ops xfs_agi_buf_ops; + #endif /* __XFS_IALLOC_H__ */ diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c index 2b8b7a37aa1..bec344b3650 100644 --- a/fs/xfs/xfs_ialloc_btree.c +++ b/fs/xfs/xfs_ialloc_btree.c @@ -33,6 +33,7 @@ #include "xfs_ialloc.h" #include "xfs_alloc.h" #include "xfs_error.h" +#include "xfs_trace.h" STATIC int @@ -181,6 +182,59 @@ xfs_inobt_key_diff( cur->bc_rec.i.ir_startino; } +void +xfs_inobt_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); + unsigned int level; + int sblock_ok; /* block passes checks */ + + /* magic number and level verification */ + level = be16_to_cpu(block->bb_level); + sblock_ok = block->bb_magic == cpu_to_be32(XFS_IBT_MAGIC) && + level < mp->m_in_maxlevels; + + /* numrecs verification */ + sblock_ok = sblock_ok && + be16_to_cpu(block->bb_numrecs) <= mp->m_inobt_mxr[level != 0]; + + /* sibling pointer verification */ + sblock_ok = sblock_ok && + (block->bb_u.s.bb_leftsib == cpu_to_be32(NULLAGBLOCK) || + be32_to_cpu(block->bb_u.s.bb_leftsib) < mp->m_sb.sb_agblocks) && + block->bb_u.s.bb_leftsib && + (block->bb_u.s.bb_rightsib == cpu_to_be32(NULLAGBLOCK) || + be32_to_cpu(block->bb_u.s.bb_rightsib) < mp->m_sb.sb_agblocks) && + block->bb_u.s.bb_rightsib; + + if (!sblock_ok) { + trace_xfs_btree_corrupt(bp, _RET_IP_); + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, block); + xfs_buf_ioerror(bp, EFSCORRUPTED); + } +} + +static void +xfs_inobt_read_verify( + struct xfs_buf *bp) +{ + xfs_inobt_verify(bp); +} + +static void +xfs_inobt_write_verify( + struct xfs_buf *bp) +{ + xfs_inobt_verify(bp); +} + +const struct xfs_buf_ops xfs_inobt_buf_ops = { + .verify_read = xfs_inobt_read_verify, + .verify_write = xfs_inobt_write_verify, +}; + #ifdef DEBUG STATIC int xfs_inobt_keys_inorder( @@ -218,6 +272,7 @@ static const struct xfs_btree_ops xfs_inobt_ops = { .init_rec_from_cur = xfs_inobt_init_rec_from_cur, .init_ptr_from_cur = xfs_inobt_init_ptr_from_cur, .key_diff = xfs_inobt_key_diff, + .buf_ops = &xfs_inobt_buf_ops, #ifdef DEBUG .keys_inorder = xfs_inobt_keys_inorder, .recs_inorder = xfs_inobt_recs_inorder, diff --git a/fs/xfs/xfs_ialloc_btree.h b/fs/xfs/xfs_ialloc_btree.h index f782ad0c476..25c0239a8ea 100644 --- a/fs/xfs/xfs_ialloc_btree.h +++ b/fs/xfs/xfs_ialloc_btree.h @@ -109,4 +109,6 @@ extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *, struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t); extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int); +extern const struct xfs_buf_ops xfs_inobt_buf_ops; + #endif /* __XFS_IALLOC_BTREE_H__ */ diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_icache.c index 9500caf15ac..96e344e3e92 100644 --- a/fs/xfs/xfs_sync.c +++ b/fs/xfs/xfs_icache.c @@ -19,6 +19,7 @@ #include "xfs_fs.h" #include "xfs_types.h" #include "xfs_log.h" +#include "xfs_log_priv.h" #include "xfs_inum.h" #include "xfs_trans.h" #include "xfs_trans_priv.h" @@ -35,11 +36,425 @@ #include "xfs_quota.h" #include "xfs_trace.h" #include "xfs_fsops.h" +#include "xfs_icache.h" #include <linux/kthread.h> #include <linux/freezer.h> -struct workqueue_struct *xfs_syncd_wq; /* sync workqueue */ +STATIC void __xfs_inode_clear_reclaim_tag(struct xfs_mount *mp, + struct xfs_perag *pag, struct xfs_inode *ip); + +/* + * Allocate and initialise an xfs_inode. + */ +STATIC struct xfs_inode * +xfs_inode_alloc( + struct xfs_mount *mp, + xfs_ino_t ino) +{ + struct xfs_inode *ip; + + /* + * if this didn't occur in transactions, we could use + * KM_MAYFAIL and return NULL here on ENOMEM. Set the + * code up to do this anyway. + */ + ip = kmem_zone_alloc(xfs_inode_zone, KM_SLEEP); + if (!ip) + return NULL; + if (inode_init_always(mp->m_super, VFS_I(ip))) { + kmem_zone_free(xfs_inode_zone, ip); + return NULL; + } + + ASSERT(atomic_read(&ip->i_pincount) == 0); + ASSERT(!spin_is_locked(&ip->i_flags_lock)); + ASSERT(!xfs_isiflocked(ip)); + ASSERT(ip->i_ino == 0); + + mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + + /* initialise the xfs inode */ + ip->i_ino = ino; + ip->i_mount = mp; + memset(&ip->i_imap, 0, sizeof(struct xfs_imap)); + ip->i_afp = NULL; + memset(&ip->i_df, 0, sizeof(xfs_ifork_t)); + ip->i_flags = 0; + ip->i_delayed_blks = 0; + memset(&ip->i_d, 0, sizeof(xfs_icdinode_t)); + + return ip; +} + +STATIC void +xfs_inode_free_callback( + struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + struct xfs_inode *ip = XFS_I(inode); + + kmem_zone_free(xfs_inode_zone, ip); +} + +STATIC void +xfs_inode_free( + struct xfs_inode *ip) +{ + switch (ip->i_d.di_mode & S_IFMT) { + case S_IFREG: + case S_IFDIR: + case S_IFLNK: + xfs_idestroy_fork(ip, XFS_DATA_FORK); + break; + } + + if (ip->i_afp) + xfs_idestroy_fork(ip, XFS_ATTR_FORK); + + if (ip->i_itemp) { + ASSERT(!(ip->i_itemp->ili_item.li_flags & XFS_LI_IN_AIL)); + xfs_inode_item_destroy(ip); + ip->i_itemp = NULL; + } + + /* asserts to verify all state is correct here */ + ASSERT(atomic_read(&ip->i_pincount) == 0); + ASSERT(!spin_is_locked(&ip->i_flags_lock)); + ASSERT(!xfs_isiflocked(ip)); + + /* + * Because we use RCU freeing we need to ensure the inode always + * appears to be reclaimed with an invalid inode number when in the + * free state. The ip->i_flags_lock provides the barrier against lookup + * races. + */ + spin_lock(&ip->i_flags_lock); + ip->i_flags = XFS_IRECLAIM; + ip->i_ino = 0; + spin_unlock(&ip->i_flags_lock); + + call_rcu(&VFS_I(ip)->i_rcu, xfs_inode_free_callback); +} + +/* + * Check the validity of the inode we just found it the cache + */ +static int +xfs_iget_cache_hit( + struct xfs_perag *pag, + struct xfs_inode *ip, + xfs_ino_t ino, + int flags, + int lock_flags) __releases(RCU) +{ + struct inode *inode = VFS_I(ip); + struct xfs_mount *mp = ip->i_mount; + int error; + + /* + * check for re-use of an inode within an RCU grace period due to the + * radix tree nodes not being updated yet. We monitor for this by + * setting the inode number to zero before freeing the inode structure. + * If the inode has been reallocated and set up, then the inode number + * will not match, so check for that, too. + */ + spin_lock(&ip->i_flags_lock); + if (ip->i_ino != ino) { + trace_xfs_iget_skip(ip); + XFS_STATS_INC(xs_ig_frecycle); + error = EAGAIN; + goto out_error; + } + + + /* + * If we are racing with another cache hit that is currently + * instantiating this inode or currently recycling it out of + * reclaimabe state, wait for the initialisation to complete + * before continuing. + * + * XXX(hch): eventually we should do something equivalent to + * wait_on_inode to wait for these flags to be cleared + * instead of polling for it. + */ + if (ip->i_flags & (XFS_INEW|XFS_IRECLAIM)) { + trace_xfs_iget_skip(ip); + XFS_STATS_INC(xs_ig_frecycle); + error = EAGAIN; + goto out_error; + } + + /* + * If lookup is racing with unlink return an error immediately. + */ + if (ip->i_d.di_mode == 0 && !(flags & XFS_IGET_CREATE)) { + error = ENOENT; + goto out_error; + } + + /* + * If IRECLAIMABLE is set, we've torn down the VFS inode already. + * Need to carefully get it back into useable state. + */ + if (ip->i_flags & XFS_IRECLAIMABLE) { + trace_xfs_iget_reclaim(ip); + + /* + * We need to set XFS_IRECLAIM to prevent xfs_reclaim_inode + * from stomping over us while we recycle the inode. We can't + * clear the radix tree reclaimable tag yet as it requires + * pag_ici_lock to be held exclusive. + */ + ip->i_flags |= XFS_IRECLAIM; + + spin_unlock(&ip->i_flags_lock); + rcu_read_unlock(); + + error = -inode_init_always(mp->m_super, inode); + if (error) { + /* + * Re-initializing the inode failed, and we are in deep + * trouble. Try to re-add it to the reclaim list. + */ + rcu_read_lock(); + spin_lock(&ip->i_flags_lock); + + ip->i_flags &= ~(XFS_INEW | XFS_IRECLAIM); + ASSERT(ip->i_flags & XFS_IRECLAIMABLE); + trace_xfs_iget_reclaim_fail(ip); + goto out_error; + } + + spin_lock(&pag->pag_ici_lock); + spin_lock(&ip->i_flags_lock); + + /* + * Clear the per-lifetime state in the inode as we are now + * effectively a new inode and need to return to the initial + * state before reuse occurs. + */ + ip->i_flags &= ~XFS_IRECLAIM_RESET_FLAGS; + ip->i_flags |= XFS_INEW; + __xfs_inode_clear_reclaim_tag(mp, pag, ip); + inode->i_state = I_NEW; + + ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); + mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + + spin_unlock(&ip->i_flags_lock); + spin_unlock(&pag->pag_ici_lock); + } else { + /* If the VFS inode is being torn down, pause and try again. */ + if (!igrab(inode)) { + trace_xfs_iget_skip(ip); + error = EAGAIN; + goto out_error; + } + + /* We've got a live one. */ + spin_unlock(&ip->i_flags_lock); + rcu_read_unlock(); + trace_xfs_iget_hit(ip); + } + + if (lock_flags != 0) + xfs_ilock(ip, lock_flags); + + xfs_iflags_clear(ip, XFS_ISTALE | XFS_IDONTCACHE); + XFS_STATS_INC(xs_ig_found); + + return 0; + +out_error: + spin_unlock(&ip->i_flags_lock); + rcu_read_unlock(); + return error; +} + + +static int +xfs_iget_cache_miss( + struct xfs_mount *mp, + struct xfs_perag *pag, + xfs_trans_t *tp, + xfs_ino_t ino, + struct xfs_inode **ipp, + int flags, + int lock_flags) +{ + struct xfs_inode *ip; + int error; + xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ino); + int iflags; + + ip = xfs_inode_alloc(mp, ino); + if (!ip) + return ENOMEM; + + error = xfs_iread(mp, tp, ip, flags); + if (error) + goto out_destroy; + + trace_xfs_iget_miss(ip); + + if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) { + error = ENOENT; + goto out_destroy; + } + + /* + * Preload the radix tree so we can insert safely under the + * write spinlock. Note that we cannot sleep inside the preload + * region. Since we can be called from transaction context, don't + * recurse into the file system. + */ + if (radix_tree_preload(GFP_NOFS)) { + error = EAGAIN; + goto out_destroy; + } + + /* + * Because the inode hasn't been added to the radix-tree yet it can't + * be found by another thread, so we can do the non-sleeping lock here. + */ + if (lock_flags) { + if (!xfs_ilock_nowait(ip, lock_flags)) + BUG(); + } + + /* + * These values must be set before inserting the inode into the radix + * tree as the moment it is inserted a concurrent lookup (allowed by the + * RCU locking mechanism) can find it and that lookup must see that this + * is an inode currently under construction (i.e. that XFS_INEW is set). + * The ip->i_flags_lock that protects the XFS_INEW flag forms the + * memory barrier that ensures this detection works correctly at lookup + * time. + */ + iflags = XFS_INEW; + if (flags & XFS_IGET_DONTCACHE) + iflags |= XFS_IDONTCACHE; + ip->i_udquot = ip->i_gdquot = NULL; + xfs_iflags_set(ip, iflags); + + /* insert the new inode */ + spin_lock(&pag->pag_ici_lock); + error = radix_tree_insert(&pag->pag_ici_root, agino, ip); + if (unlikely(error)) { + WARN_ON(error != -EEXIST); + XFS_STATS_INC(xs_ig_dup); + error = EAGAIN; + goto out_preload_end; + } + spin_unlock(&pag->pag_ici_lock); + radix_tree_preload_end(); + + *ipp = ip; + return 0; + +out_preload_end: + spin_unlock(&pag->pag_ici_lock); + radix_tree_preload_end(); + if (lock_flags) + xfs_iunlock(ip, lock_flags); +out_destroy: + __destroy_inode(VFS_I(ip)); + xfs_inode_free(ip); + return error; +} + +/* + * Look up an inode by number in the given file system. + * The inode is looked up in the cache held in each AG. + * If the inode is found in the cache, initialise the vfs inode + * if necessary. + * + * If it is not in core, read it in from the file system's device, + * add it to the cache and initialise the vfs inode. + * + * The inode is locked according to the value of the lock_flags parameter. + * This flag parameter indicates how and if the inode's IO lock and inode lock + * should be taken. + * + * mp -- the mount point structure for the current file system. It points + * to the inode hash table. + * tp -- a pointer to the current transaction if there is one. This is + * simply passed through to the xfs_iread() call. + * ino -- the number of the inode desired. This is the unique identifier + * within the file system for the inode being requested. + * lock_flags -- flags indicating how to lock the inode. See the comment + * for xfs_ilock() for a list of valid values. + */ +int +xfs_iget( + xfs_mount_t *mp, + xfs_trans_t *tp, + xfs_ino_t ino, + uint flags, + uint lock_flags, + xfs_inode_t **ipp) +{ + xfs_inode_t *ip; + int error; + xfs_perag_t *pag; + xfs_agino_t agino; + + /* + * xfs_reclaim_inode() uses the ILOCK to ensure an inode + * doesn't get freed while it's being referenced during a + * radix tree traversal here. It assumes this function + * aqcuires only the ILOCK (and therefore it has no need to + * involve the IOLOCK in this synchronization). + */ + ASSERT((lock_flags & (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED)) == 0); + + /* reject inode numbers outside existing AGs */ + if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) + return EINVAL; + + /* get the perag structure and ensure that it's inode capable */ + pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ino)); + agino = XFS_INO_TO_AGINO(mp, ino); + +again: + error = 0; + rcu_read_lock(); + ip = radix_tree_lookup(&pag->pag_ici_root, agino); + + if (ip) { + error = xfs_iget_cache_hit(pag, ip, ino, flags, lock_flags); + if (error) + goto out_error_or_again; + } else { + rcu_read_unlock(); + XFS_STATS_INC(xs_ig_missed); + + error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip, + flags, lock_flags); + if (error) + goto out_error_or_again; + } + xfs_perag_put(pag); + + *ipp = ip; + + /* + * If we have a real type for an on-disk inode, we can set ops(&unlock) + * now. If it's a new inode being created, xfs_ialloc will handle it. + */ + if (xfs_iflags_test(ip, XFS_INEW) && ip->i_d.di_mode != 0) + xfs_setup_inode(ip); + return 0; + +out_error_or_again: + if (error == EAGAIN) { + delay(1); + goto again; + } + xfs_perag_put(pag); + return error; +} /* * The inode lookup is done in batches to keep the amount of lock traffic and @@ -101,8 +516,11 @@ xfs_inode_ag_walk( struct xfs_mount *mp, struct xfs_perag *pag, int (*execute)(struct xfs_inode *ip, - struct xfs_perag *pag, int flags), - int flags) + struct xfs_perag *pag, int flags, + void *args), + int flags, + void *args, + int tag) { uint32_t first_index; int last_error = 0; @@ -121,9 +539,17 @@ restart: int i; rcu_read_lock(); - nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, + + if (tag == -1) + nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void **)batch, first_index, XFS_LOOKUP_BATCH); + else + nr_found = radix_tree_gang_lookup_tag( + &pag->pag_ici_root, + (void **) batch, first_index, + XFS_LOOKUP_BATCH, tag); + if (!nr_found) { rcu_read_unlock(); break; @@ -164,7 +590,7 @@ restart: for (i = 0; i < nr_found; i++) { if (!batch[i]) continue; - error = execute(batch[i], pag, flags); + error = execute(batch[i], pag, flags, args); IRELE(batch[i]); if (error == EAGAIN) { skipped++; @@ -189,12 +615,40 @@ restart: return last_error; } +/* + * Background scanning to trim post-EOF preallocated space. This is queued + * based on the 'background_prealloc_discard_period' tunable (5m by default). + */ +STATIC void +xfs_queue_eofblocks( + struct xfs_mount *mp) +{ + rcu_read_lock(); + if (radix_tree_tagged(&mp->m_perag_tree, XFS_ICI_EOFBLOCKS_TAG)) + queue_delayed_work(mp->m_eofblocks_workqueue, + &mp->m_eofblocks_work, + msecs_to_jiffies(xfs_eofb_secs * 1000)); + rcu_read_unlock(); +} + +void +xfs_eofblocks_worker( + struct work_struct *work) +{ + struct xfs_mount *mp = container_of(to_delayed_work(work), + struct xfs_mount, m_eofblocks_work); + xfs_icache_free_eofblocks(mp, NULL); + xfs_queue_eofblocks(mp); +} + int xfs_inode_ag_iterator( struct xfs_mount *mp, int (*execute)(struct xfs_inode *ip, - struct xfs_perag *pag, int flags), - int flags) + struct xfs_perag *pag, int flags, + void *args), + int flags, + void *args) { struct xfs_perag *pag; int error = 0; @@ -204,7 +658,7 @@ xfs_inode_ag_iterator( ag = 0; while ((pag = xfs_perag_get(mp, ag))) { ag = pag->pag_agno + 1; - error = xfs_inode_ag_walk(mp, pag, execute, flags); + error = xfs_inode_ag_walk(mp, pag, execute, flags, args, -1); xfs_perag_put(pag); if (error) { last_error = error; @@ -215,224 +669,50 @@ xfs_inode_ag_iterator( return XFS_ERROR(last_error); } -STATIC int -xfs_sync_inode_data( - struct xfs_inode *ip, - struct xfs_perag *pag, - int flags) -{ - struct inode *inode = VFS_I(ip); - struct address_space *mapping = inode->i_mapping; - int error = 0; - - if (!mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) - return 0; - - if (!xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED)) { - if (flags & SYNC_TRYLOCK) - return 0; - xfs_ilock(ip, XFS_IOLOCK_SHARED); - } - - error = xfs_flush_pages(ip, 0, -1, (flags & SYNC_WAIT) ? - 0 : XBF_ASYNC, FI_NONE); - xfs_iunlock(ip, XFS_IOLOCK_SHARED); - return error; -} - -/* - * Write out pagecache data for the whole filesystem. - */ -STATIC int -xfs_sync_data( - struct xfs_mount *mp, - int flags) -{ - int error; - - ASSERT((flags & ~(SYNC_TRYLOCK|SYNC_WAIT)) == 0); - - error = xfs_inode_ag_iterator(mp, xfs_sync_inode_data, flags); - if (error) - return XFS_ERROR(error); - - xfs_log_force(mp, (flags & SYNC_WAIT) ? XFS_LOG_SYNC : 0); - return 0; -} - -STATIC int -xfs_sync_fsdata( - struct xfs_mount *mp) -{ - struct xfs_buf *bp; - int error; - - /* - * If the buffer is pinned then push on the log so we won't get stuck - * waiting in the write for someone, maybe ourselves, to flush the log. - * - * Even though we just pushed the log above, we did not have the - * superblock buffer locked at that point so it can become pinned in - * between there and here. - */ - bp = xfs_getsb(mp, 0); - if (xfs_buf_ispinned(bp)) - xfs_log_force(mp, 0); - error = xfs_bwrite(bp); - xfs_buf_relse(bp); - return error; -} - -/* - * When remounting a filesystem read-only or freezing the filesystem, we have - * two phases to execute. This first phase is syncing the data before we - * quiesce the filesystem, and the second is flushing all the inodes out after - * we've waited for all the transactions created by the first phase to - * complete. The second phase ensures that the inodes are written to their - * location on disk rather than just existing in transactions in the log. This - * means after a quiesce there is no log replay required to write the inodes to - * disk (this is the main difference between a sync and a quiesce). - */ -/* - * First stage of freeze - no writers will make progress now we are here, - * so we flush delwri and delalloc buffers here, then wait for all I/O to - * complete. Data is frozen at that point. Metadata is not frozen, - * transactions can still occur here so don't bother emptying the AIL - * because it'll just get dirty again. - */ int -xfs_quiesce_data( - struct xfs_mount *mp) -{ - int error, error2 = 0; - - /* force out the log */ - xfs_log_force(mp, XFS_LOG_SYNC); - - /* write superblock and hoover up shutdown errors */ - error = xfs_sync_fsdata(mp); - - /* mark the log as covered if needed */ - if (xfs_log_need_covered(mp)) - error2 = xfs_fs_log_dummy(mp); - - return error ? error : error2; -} - -/* - * Second stage of a quiesce. The data is already synced, now we have to take - * care of the metadata. New transactions are already blocked, so we need to - * wait for any remaining transactions to drain out before proceeding. - */ -void -xfs_quiesce_attr( - struct xfs_mount *mp) -{ - int error = 0; - - /* wait for all modifications to complete */ - while (atomic_read(&mp->m_active_trans) > 0) - delay(100); - - /* reclaim inodes to do any IO before the freeze completes */ - xfs_reclaim_inodes(mp, 0); - xfs_reclaim_inodes(mp, SYNC_WAIT); - - /* flush all pending changes from the AIL */ - xfs_ail_push_all_sync(mp->m_ail); - - /* - * Just warn here till VFS can correctly support - * read-only remount without racing. - */ - WARN_ON(atomic_read(&mp->m_active_trans) != 0); - - /* Push the superblock and write an unmount record */ - error = xfs_log_sbcount(mp); - if (error) - xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " - "Frozen image may not be consistent."); - xfs_log_unmount_write(mp); - - /* - * At this point we might have modified the superblock again and thus - * added an item to the AIL, thus flush it again. - */ - xfs_ail_push_all_sync(mp->m_ail); - - /* - * The superblock buffer is uncached and xfsaild_push() will lock and - * set the XBF_ASYNC flag on the buffer. We cannot do xfs_buf_iowait() - * here but a lock on the superblock buffer will block until iodone() - * has completed. - */ - xfs_buf_lock(mp->m_sb_bp); - xfs_buf_unlock(mp->m_sb_bp); -} - -static void -xfs_syncd_queue_sync( - struct xfs_mount *mp) -{ - queue_delayed_work(xfs_syncd_wq, &mp->m_sync_work, - msecs_to_jiffies(xfs_syncd_centisecs * 10)); -} - -/* - * Every sync period we need to unpin all items, reclaim inodes and sync - * disk quotas. We might need to cover the log to indicate that the - * filesystem is idle and not frozen. - */ -STATIC void -xfs_sync_worker( - struct work_struct *work) +xfs_inode_ag_iterator_tag( + struct xfs_mount *mp, + int (*execute)(struct xfs_inode *ip, + struct xfs_perag *pag, int flags, + void *args), + int flags, + void *args, + int tag) { - struct xfs_mount *mp = container_of(to_delayed_work(work), - struct xfs_mount, m_sync_work); - int error; - - /* - * We shouldn't write/force the log if we are in the mount/unmount - * process or on a read only filesystem. The workqueue still needs to be - * active in both cases, however, because it is used for inode reclaim - * during these times. Use the MS_ACTIVE flag to avoid doing anything - * during mount. Doing work during unmount is avoided by calling - * cancel_delayed_work_sync on this work queue before tearing down - * the ail and the log in xfs_log_unmount. - */ - if (!(mp->m_super->s_flags & MS_ACTIVE) && - !(mp->m_flags & XFS_MOUNT_RDONLY)) { - /* dgc: errors ignored here */ - if (mp->m_super->s_writers.frozen == SB_UNFROZEN && - xfs_log_need_covered(mp)) - error = xfs_fs_log_dummy(mp); - else - xfs_log_force(mp, 0); + struct xfs_perag *pag; + int error = 0; + int last_error = 0; + xfs_agnumber_t ag; - /* start pushing all the metadata that is currently - * dirty */ - xfs_ail_push_all(mp->m_ail); + ag = 0; + while ((pag = xfs_perag_get_tag(mp, ag, tag))) { + ag = pag->pag_agno + 1; + error = xfs_inode_ag_walk(mp, pag, execute, flags, args, tag); + xfs_perag_put(pag); + if (error) { + last_error = error; + if (error == EFSCORRUPTED) + break; + } } - - /* queue us up again */ - xfs_syncd_queue_sync(mp); + return XFS_ERROR(last_error); } /* * Queue a new inode reclaim pass if there are reclaimable inodes and there * isn't a reclaim pass already in progress. By default it runs every 5s based - * on the xfs syncd work default of 30s. Perhaps this should have it's own + * on the xfs periodic sync default of 30s. Perhaps this should have it's own * tunable, but that can be done if this method proves to be ineffective or too * aggressive. */ static void -xfs_syncd_queue_reclaim( +xfs_reclaim_work_queue( struct xfs_mount *mp) { rcu_read_lock(); if (radix_tree_tagged(&mp->m_perag_tree, XFS_ICI_RECLAIM_TAG)) { - queue_delayed_work(xfs_syncd_wq, &mp->m_reclaim_work, + queue_delayed_work(mp->m_reclaim_workqueue, &mp->m_reclaim_work, msecs_to_jiffies(xfs_syncd_centisecs / 6 * 10)); } rcu_read_unlock(); @@ -445,7 +725,7 @@ xfs_syncd_queue_reclaim( * goes low. It scans as quickly as possible avoiding locked inodes or those * already being flushed, and once done schedules a future pass. */ -STATIC void +void xfs_reclaim_worker( struct work_struct *work) { @@ -453,65 +733,10 @@ xfs_reclaim_worker( struct xfs_mount, m_reclaim_work); xfs_reclaim_inodes(mp, SYNC_TRYLOCK); - xfs_syncd_queue_reclaim(mp); + xfs_reclaim_work_queue(mp); } -/* - * Flush delayed allocate data, attempting to free up reserved space - * from existing allocations. At this point a new allocation attempt - * has failed with ENOSPC and we are in the process of scratching our - * heads, looking about for more room. - * - * Queue a new data flush if there isn't one already in progress and - * wait for completion of the flush. This means that we only ever have one - * inode flush in progress no matter how many ENOSPC events are occurring and - * so will prevent the system from bogging down due to every concurrent - * ENOSPC event scanning all the active inodes in the system for writeback. - */ -void -xfs_flush_inodes( - struct xfs_inode *ip) -{ - struct xfs_mount *mp = ip->i_mount; - - queue_work(xfs_syncd_wq, &mp->m_flush_work); - flush_work(&mp->m_flush_work); -} - -STATIC void -xfs_flush_worker( - struct work_struct *work) -{ - struct xfs_mount *mp = container_of(work, - struct xfs_mount, m_flush_work); - - xfs_sync_data(mp, SYNC_TRYLOCK); - xfs_sync_data(mp, SYNC_TRYLOCK | SYNC_WAIT); -} - -int -xfs_syncd_init( - struct xfs_mount *mp) -{ - INIT_WORK(&mp->m_flush_work, xfs_flush_worker); - INIT_DELAYED_WORK(&mp->m_sync_work, xfs_sync_worker); - INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); - - xfs_syncd_queue_sync(mp); - - return 0; -} - -void -xfs_syncd_stop( - struct xfs_mount *mp) -{ - cancel_delayed_work_sync(&mp->m_sync_work); - cancel_delayed_work_sync(&mp->m_reclaim_work); - cancel_work_sync(&mp->m_flush_work); -} - -void +static void __xfs_inode_set_reclaim_tag( struct xfs_perag *pag, struct xfs_inode *ip) @@ -529,7 +754,7 @@ __xfs_inode_set_reclaim_tag( spin_unlock(&ip->i_mount->m_perag_lock); /* schedule periodic background inode reclaim */ - xfs_syncd_queue_reclaim(ip->i_mount); + xfs_reclaim_work_queue(ip->i_mount); trace_xfs_perag_set_reclaim(ip->i_mount, pag->pag_agno, -1, _RET_IP_); @@ -577,7 +802,7 @@ __xfs_inode_clear_reclaim( } } -void +STATIC void __xfs_inode_clear_reclaim_tag( xfs_mount_t *mp, xfs_perag_t *pag, @@ -787,9 +1012,9 @@ out: /* * We could return EAGAIN here to make reclaim rescan the inode tree in * a short while. However, this just burns CPU time scanning the tree - * waiting for IO to complete and xfssyncd never goes back to the idle - * state. Instead, return 0 to let the next scheduled background reclaim - * attempt to reclaim the inode again. + * waiting for IO to complete and the reclaim work never goes back to + * the idle state. Instead, return 0 to let the next scheduled + * background reclaim attempt to reclaim the inode again. */ return 0; } @@ -800,7 +1025,7 @@ out: * then a shut down during filesystem unmount reclaim walk leak all the * unreclaimed inodes. */ -int +STATIC int xfs_reclaim_inodes_ag( struct xfs_mount *mp, int flags, @@ -945,7 +1170,7 @@ xfs_reclaim_inodes_nr( int nr_to_scan) { /* kick background reclaimer and push the AIL */ - xfs_syncd_queue_reclaim(mp); + xfs_reclaim_work_queue(mp); xfs_ail_push_all(mp->m_ail); xfs_reclaim_inodes_ag(mp, SYNC_TRYLOCK | SYNC_WAIT, &nr_to_scan); @@ -971,3 +1196,146 @@ xfs_reclaim_inodes_count( return reclaimable; } +STATIC int +xfs_inode_match_id( + struct xfs_inode *ip, + struct xfs_eofblocks *eofb) +{ + if (eofb->eof_flags & XFS_EOF_FLAGS_UID && + ip->i_d.di_uid != eofb->eof_uid) + return 0; + + if (eofb->eof_flags & XFS_EOF_FLAGS_GID && + ip->i_d.di_gid != eofb->eof_gid) + return 0; + + if (eofb->eof_flags & XFS_EOF_FLAGS_PRID && + xfs_get_projid(ip) != eofb->eof_prid) + return 0; + + return 1; +} + +STATIC int +xfs_inode_free_eofblocks( + struct xfs_inode *ip, + struct xfs_perag *pag, + int flags, + void *args) +{ + int ret; + struct xfs_eofblocks *eofb = args; + + if (!xfs_can_free_eofblocks(ip, false)) { + /* inode could be preallocated or append-only */ + trace_xfs_inode_free_eofblocks_invalid(ip); + xfs_inode_clear_eofblocks_tag(ip); + return 0; + } + + /* + * If the mapping is dirty the operation can block and wait for some + * time. Unless we are waiting, skip it. + */ + if (!(flags & SYNC_WAIT) && + mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY)) + return 0; + + if (eofb) { + if (!xfs_inode_match_id(ip, eofb)) + return 0; + + /* skip the inode if the file size is too small */ + if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE && + XFS_ISIZE(ip) < eofb->eof_min_file_size) + return 0; + } + + ret = xfs_free_eofblocks(ip->i_mount, ip, true); + + /* don't revisit the inode if we're not waiting */ + if (ret == EAGAIN && !(flags & SYNC_WAIT)) + ret = 0; + + return ret; +} + +int +xfs_icache_free_eofblocks( + struct xfs_mount *mp, + struct xfs_eofblocks *eofb) +{ + int flags = SYNC_TRYLOCK; + + if (eofb && (eofb->eof_flags & XFS_EOF_FLAGS_SYNC)) + flags = SYNC_WAIT; + + return xfs_inode_ag_iterator_tag(mp, xfs_inode_free_eofblocks, flags, + eofb, XFS_ICI_EOFBLOCKS_TAG); +} + +void +xfs_inode_set_eofblocks_tag( + xfs_inode_t *ip) +{ + struct xfs_mount *mp = ip->i_mount; + struct xfs_perag *pag; + int tagged; + + pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); + spin_lock(&pag->pag_ici_lock); + trace_xfs_inode_set_eofblocks_tag(ip); + + tagged = radix_tree_tagged(&pag->pag_ici_root, + XFS_ICI_EOFBLOCKS_TAG); + radix_tree_tag_set(&pag->pag_ici_root, + XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino), + XFS_ICI_EOFBLOCKS_TAG); + if (!tagged) { + /* propagate the eofblocks tag up into the perag radix tree */ + spin_lock(&ip->i_mount->m_perag_lock); + radix_tree_tag_set(&ip->i_mount->m_perag_tree, + XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino), + XFS_ICI_EOFBLOCKS_TAG); + spin_unlock(&ip->i_mount->m_perag_lock); + + /* kick off background trimming */ + xfs_queue_eofblocks(ip->i_mount); + + trace_xfs_perag_set_eofblocks(ip->i_mount, pag->pag_agno, + -1, _RET_IP_); + } + + spin_unlock(&pag->pag_ici_lock); + xfs_perag_put(pag); +} + +void +xfs_inode_clear_eofblocks_tag( + xfs_inode_t *ip) +{ + struct xfs_mount *mp = ip->i_mount; + struct xfs_perag *pag; + + pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); + spin_lock(&pag->pag_ici_lock); + trace_xfs_inode_clear_eofblocks_tag(ip); + + radix_tree_tag_clear(&pag->pag_ici_root, + XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino), + XFS_ICI_EOFBLOCKS_TAG); + if (!radix_tree_tagged(&pag->pag_ici_root, XFS_ICI_EOFBLOCKS_TAG)) { + /* clear the eofblocks tag from the perag radix tree */ + spin_lock(&ip->i_mount->m_perag_lock); + radix_tree_tag_clear(&ip->i_mount->m_perag_tree, + XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino), + XFS_ICI_EOFBLOCKS_TAG); + spin_unlock(&ip->i_mount->m_perag_lock); + trace_xfs_perag_clear_eofblocks(ip->i_mount, pag->pag_agno, + -1, _RET_IP_); + } + + spin_unlock(&pag->pag_ici_lock); + xfs_perag_put(pag); +} + diff --git a/fs/xfs/xfs_sync.h b/fs/xfs/xfs_icache.h index 941202e7ac6..e0f138c70a2 100644 --- a/fs/xfs/xfs_sync.h +++ b/fs/xfs/xfs_icache.h @@ -24,28 +24,30 @@ struct xfs_perag; #define SYNC_WAIT 0x0001 /* wait for i/o to complete */ #define SYNC_TRYLOCK 0x0002 /* only try to lock inodes */ -extern struct workqueue_struct *xfs_syncd_wq; /* sync workqueue */ +int xfs_iget(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t ino, + uint flags, uint lock_flags, xfs_inode_t **ipp); -int xfs_syncd_init(struct xfs_mount *mp); -void xfs_syncd_stop(struct xfs_mount *mp); - -int xfs_quiesce_data(struct xfs_mount *mp); -void xfs_quiesce_attr(struct xfs_mount *mp); - -void xfs_flush_inodes(struct xfs_inode *ip); +void xfs_reclaim_worker(struct work_struct *work); int xfs_reclaim_inodes(struct xfs_mount *mp, int mode); int xfs_reclaim_inodes_count(struct xfs_mount *mp); void xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan); void xfs_inode_set_reclaim_tag(struct xfs_inode *ip); -void __xfs_inode_set_reclaim_tag(struct xfs_perag *pag, struct xfs_inode *ip); -void __xfs_inode_clear_reclaim_tag(struct xfs_mount *mp, struct xfs_perag *pag, - struct xfs_inode *ip); + +void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip); +void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip); +int xfs_icache_free_eofblocks(struct xfs_mount *, struct xfs_eofblocks *); +void xfs_eofblocks_worker(struct work_struct *); int xfs_sync_inode_grab(struct xfs_inode *ip); int xfs_inode_ag_iterator(struct xfs_mount *mp, - int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag, int flags), - int flags); + int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag, + int flags, void *args), + int flags, void *args); +int xfs_inode_ag_iterator_tag(struct xfs_mount *mp, + int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag, + int flags, void *args), + int flags, void *args, int tag); #endif diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c deleted file mode 100644 index 784a803383e..00000000000 --- a/fs/xfs/xfs_iget.c +++ /dev/null @@ -1,705 +0,0 @@ -/* - * Copyright (c) 2000-2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "xfs.h" -#include "xfs_fs.h" -#include "xfs_types.h" -#include "xfs_acl.h" -#include "xfs_log.h" -#include "xfs_inum.h" -#include "xfs_trans.h" -#include "xfs_sb.h" -#include "xfs_ag.h" -#include "xfs_mount.h" -#include "xfs_bmap_btree.h" -#include "xfs_alloc_btree.h" -#include "xfs_ialloc_btree.h" -#include "xfs_dinode.h" -#include "xfs_inode.h" -#include "xfs_btree.h" -#include "xfs_ialloc.h" -#include "xfs_quota.h" -#include "xfs_utils.h" -#include "xfs_trans_priv.h" -#include "xfs_inode_item.h" -#include "xfs_bmap.h" -#include "xfs_trace.h" - - -/* - * Allocate and initialise an xfs_inode. - */ -STATIC struct xfs_inode * -xfs_inode_alloc( - struct xfs_mount *mp, - xfs_ino_t ino) -{ - struct xfs_inode *ip; - - /* - * if this didn't occur in transactions, we could use - * KM_MAYFAIL and return NULL here on ENOMEM. Set the - * code up to do this anyway. - */ - ip = kmem_zone_alloc(xfs_inode_zone, KM_SLEEP); - if (!ip) - return NULL; - if (inode_init_always(mp->m_super, VFS_I(ip))) { - kmem_zone_free(xfs_inode_zone, ip); - return NULL; - } - - ASSERT(atomic_read(&ip->i_pincount) == 0); - ASSERT(!spin_is_locked(&ip->i_flags_lock)); - ASSERT(!xfs_isiflocked(ip)); - ASSERT(ip->i_ino == 0); - - mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); - - /* initialise the xfs inode */ - ip->i_ino = ino; - ip->i_mount = mp; - memset(&ip->i_imap, 0, sizeof(struct xfs_imap)); - ip->i_afp = NULL; - memset(&ip->i_df, 0, sizeof(xfs_ifork_t)); - ip->i_flags = 0; - ip->i_delayed_blks = 0; - memset(&ip->i_d, 0, sizeof(xfs_icdinode_t)); - - return ip; -} - -STATIC void -xfs_inode_free_callback( - struct rcu_head *head) -{ - struct inode *inode = container_of(head, struct inode, i_rcu); - struct xfs_inode *ip = XFS_I(inode); - - kmem_zone_free(xfs_inode_zone, ip); -} - -void -xfs_inode_free( - struct xfs_inode *ip) -{ - switch (ip->i_d.di_mode & S_IFMT) { - case S_IFREG: - case S_IFDIR: - case S_IFLNK: - xfs_idestroy_fork(ip, XFS_DATA_FORK); - break; - } - - if (ip->i_afp) - xfs_idestroy_fork(ip, XFS_ATTR_FORK); - - if (ip->i_itemp) { - ASSERT(!(ip->i_itemp->ili_item.li_flags & XFS_LI_IN_AIL)); - xfs_inode_item_destroy(ip); - ip->i_itemp = NULL; - } - - /* asserts to verify all state is correct here */ - ASSERT(atomic_read(&ip->i_pincount) == 0); - ASSERT(!spin_is_locked(&ip->i_flags_lock)); - ASSERT(!xfs_isiflocked(ip)); - - /* - * Because we use RCU freeing we need to ensure the inode always - * appears to be reclaimed with an invalid inode number when in the - * free state. The ip->i_flags_lock provides the barrier against lookup - * races. - */ - spin_lock(&ip->i_flags_lock); - ip->i_flags = XFS_IRECLAIM; - ip->i_ino = 0; - spin_unlock(&ip->i_flags_lock); - - call_rcu(&VFS_I(ip)->i_rcu, xfs_inode_free_callback); -} - -/* - * Check the validity of the inode we just found it the cache - */ -static int -xfs_iget_cache_hit( - struct xfs_perag *pag, - struct xfs_inode *ip, - xfs_ino_t ino, - int flags, - int lock_flags) __releases(RCU) -{ - struct inode *inode = VFS_I(ip); - struct xfs_mount *mp = ip->i_mount; - int error; - - /* - * check for re-use of an inode within an RCU grace period due to the - * radix tree nodes not being updated yet. We monitor for this by - * setting the inode number to zero before freeing the inode structure. - * If the inode has been reallocated and set up, then the inode number - * will not match, so check for that, too. - */ - spin_lock(&ip->i_flags_lock); - if (ip->i_ino != ino) { - trace_xfs_iget_skip(ip); - XFS_STATS_INC(xs_ig_frecycle); - error = EAGAIN; - goto out_error; - } - - - /* - * If we are racing with another cache hit that is currently - * instantiating this inode or currently recycling it out of - * reclaimabe state, wait for the initialisation to complete - * before continuing. - * - * XXX(hch): eventually we should do something equivalent to - * wait_on_inode to wait for these flags to be cleared - * instead of polling for it. - */ - if (ip->i_flags & (XFS_INEW|XFS_IRECLAIM)) { - trace_xfs_iget_skip(ip); - XFS_STATS_INC(xs_ig_frecycle); - error = EAGAIN; - goto out_error; - } - - /* - * If lookup is racing with unlink return an error immediately. - */ - if (ip->i_d.di_mode == 0 && !(flags & XFS_IGET_CREATE)) { - error = ENOENT; - goto out_error; - } - - /* - * If IRECLAIMABLE is set, we've torn down the VFS inode already. - * Need to carefully get it back into useable state. - */ - if (ip->i_flags & XFS_IRECLAIMABLE) { - trace_xfs_iget_reclaim(ip); - - /* - * We need to set XFS_IRECLAIM to prevent xfs_reclaim_inode - * from stomping over us while we recycle the inode. We can't - * clear the radix tree reclaimable tag yet as it requires - * pag_ici_lock to be held exclusive. - */ - ip->i_flags |= XFS_IRECLAIM; - - spin_unlock(&ip->i_flags_lock); - rcu_read_unlock(); - - error = -inode_init_always(mp->m_super, inode); - if (error) { - /* - * Re-initializing the inode failed, and we are in deep - * trouble. Try to re-add it to the reclaim list. - */ - rcu_read_lock(); - spin_lock(&ip->i_flags_lock); - - ip->i_flags &= ~(XFS_INEW | XFS_IRECLAIM); - ASSERT(ip->i_flags & XFS_IRECLAIMABLE); - trace_xfs_iget_reclaim_fail(ip); - goto out_error; - } - - spin_lock(&pag->pag_ici_lock); - spin_lock(&ip->i_flags_lock); - - /* - * Clear the per-lifetime state in the inode as we are now - * effectively a new inode and need to return to the initial - * state before reuse occurs. - */ - ip->i_flags &= ~XFS_IRECLAIM_RESET_FLAGS; - ip->i_flags |= XFS_INEW; - __xfs_inode_clear_reclaim_tag(mp, pag, ip); - inode->i_state = I_NEW; - - ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); - mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); - - spin_unlock(&ip->i_flags_lock); - spin_unlock(&pag->pag_ici_lock); - } else { - /* If the VFS inode is being torn down, pause and try again. */ - if (!igrab(inode)) { - trace_xfs_iget_skip(ip); - error = EAGAIN; - goto out_error; - } - - /* We've got a live one. */ - spin_unlock(&ip->i_flags_lock); - rcu_read_unlock(); - trace_xfs_iget_hit(ip); - } - - if (lock_flags != 0) - xfs_ilock(ip, lock_flags); - - xfs_iflags_clear(ip, XFS_ISTALE | XFS_IDONTCACHE); - XFS_STATS_INC(xs_ig_found); - - return 0; - -out_error: - spin_unlock(&ip->i_flags_lock); - rcu_read_unlock(); - return error; -} - - -static int -xfs_iget_cache_miss( - struct xfs_mount *mp, - struct xfs_perag *pag, - xfs_trans_t *tp, - xfs_ino_t ino, - struct xfs_inode **ipp, - int flags, - int lock_flags) -{ - struct xfs_inode *ip; - int error; - xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ino); - int iflags; - - ip = xfs_inode_alloc(mp, ino); - if (!ip) - return ENOMEM; - - error = xfs_iread(mp, tp, ip, flags); - if (error) - goto out_destroy; - - trace_xfs_iget_miss(ip); - - if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) { - error = ENOENT; - goto out_destroy; - } - - /* - * Preload the radix tree so we can insert safely under the - * write spinlock. Note that we cannot sleep inside the preload - * region. Since we can be called from transaction context, don't - * recurse into the file system. - */ - if (radix_tree_preload(GFP_NOFS)) { - error = EAGAIN; - goto out_destroy; - } - - /* - * Because the inode hasn't been added to the radix-tree yet it can't - * be found by another thread, so we can do the non-sleeping lock here. - */ - if (lock_flags) { - if (!xfs_ilock_nowait(ip, lock_flags)) - BUG(); - } - - /* - * These values must be set before inserting the inode into the radix - * tree as the moment it is inserted a concurrent lookup (allowed by the - * RCU locking mechanism) can find it and that lookup must see that this - * is an inode currently under construction (i.e. that XFS_INEW is set). - * The ip->i_flags_lock that protects the XFS_INEW flag forms the - * memory barrier that ensures this detection works correctly at lookup - * time. - */ - iflags = XFS_INEW; - if (flags & XFS_IGET_DONTCACHE) - iflags |= XFS_IDONTCACHE; - ip->i_udquot = ip->i_gdquot = NULL; - xfs_iflags_set(ip, iflags); - - /* insert the new inode */ - spin_lock(&pag->pag_ici_lock); - error = radix_tree_insert(&pag->pag_ici_root, agino, ip); - if (unlikely(error)) { - WARN_ON(error != -EEXIST); - XFS_STATS_INC(xs_ig_dup); - error = EAGAIN; - goto out_preload_end; - } - spin_unlock(&pag->pag_ici_lock); - radix_tree_preload_end(); - - *ipp = ip; - return 0; - -out_preload_end: - spin_unlock(&pag->pag_ici_lock); - radix_tree_preload_end(); - if (lock_flags) - xfs_iunlock(ip, lock_flags); -out_destroy: - __destroy_inode(VFS_I(ip)); - xfs_inode_free(ip); - return error; -} - -/* - * Look up an inode by number in the given file system. - * The inode is looked up in the cache held in each AG. - * If the inode is found in the cache, initialise the vfs inode - * if necessary. - * - * If it is not in core, read it in from the file system's device, - * add it to the cache and initialise the vfs inode. - * - * The inode is locked according to the value of the lock_flags parameter. - * This flag parameter indicates how and if the inode's IO lock and inode lock - * should be taken. - * - * mp -- the mount point structure for the current file system. It points - * to the inode hash table. - * tp -- a pointer to the current transaction if there is one. This is - * simply passed through to the xfs_iread() call. - * ino -- the number of the inode desired. This is the unique identifier - * within the file system for the inode being requested. - * lock_flags -- flags indicating how to lock the inode. See the comment - * for xfs_ilock() for a list of valid values. - */ -int -xfs_iget( - xfs_mount_t *mp, - xfs_trans_t *tp, - xfs_ino_t ino, - uint flags, - uint lock_flags, - xfs_inode_t **ipp) -{ - xfs_inode_t *ip; - int error; - xfs_perag_t *pag; - xfs_agino_t agino; - - /* - * xfs_reclaim_inode() uses the ILOCK to ensure an inode - * doesn't get freed while it's being referenced during a - * radix tree traversal here. It assumes this function - * aqcuires only the ILOCK (and therefore it has no need to - * involve the IOLOCK in this synchronization). - */ - ASSERT((lock_flags & (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED)) == 0); - - /* reject inode numbers outside existing AGs */ - if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) - return EINVAL; - - /* get the perag structure and ensure that it's inode capable */ - pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ino)); - agino = XFS_INO_TO_AGINO(mp, ino); - -again: - error = 0; - rcu_read_lock(); - ip = radix_tree_lookup(&pag->pag_ici_root, agino); - - if (ip) { - error = xfs_iget_cache_hit(pag, ip, ino, flags, lock_flags); - if (error) - goto out_error_or_again; - } else { - rcu_read_unlock(); - XFS_STATS_INC(xs_ig_missed); - - error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip, - flags, lock_flags); - if (error) - goto out_error_or_again; - } - xfs_perag_put(pag); - - *ipp = ip; - - /* - * If we have a real type for an on-disk inode, we can set ops(&unlock) - * now. If it's a new inode being created, xfs_ialloc will handle it. - */ - if (xfs_iflags_test(ip, XFS_INEW) && ip->i_d.di_mode != 0) - xfs_setup_inode(ip); - return 0; - -out_error_or_again: - if (error == EAGAIN) { - delay(1); - goto again; - } - xfs_perag_put(pag); - return error; -} - -/* - * This is a wrapper routine around the xfs_ilock() routine - * used to centralize some grungy code. It is used in places - * that wish to lock the inode solely for reading the extents. - * The reason these places can't just call xfs_ilock(SHARED) - * is that the inode lock also guards to bringing in of the - * extents from disk for a file in b-tree format. If the inode - * is in b-tree format, then we need to lock the inode exclusively - * until the extents are read in. Locking it exclusively all - * the time would limit our parallelism unnecessarily, though. - * What we do instead is check to see if the extents have been - * read in yet, and only lock the inode exclusively if they - * have not. - * - * The function returns a value which should be given to the - * corresponding xfs_iunlock_map_shared(). This value is - * the mode in which the lock was actually taken. - */ -uint -xfs_ilock_map_shared( - xfs_inode_t *ip) -{ - uint lock_mode; - - if ((ip->i_d.di_format == XFS_DINODE_FMT_BTREE) && - ((ip->i_df.if_flags & XFS_IFEXTENTS) == 0)) { - lock_mode = XFS_ILOCK_EXCL; - } else { - lock_mode = XFS_ILOCK_SHARED; - } - - xfs_ilock(ip, lock_mode); - - return lock_mode; -} - -/* - * This is simply the unlock routine to go with xfs_ilock_map_shared(). - * All it does is call xfs_iunlock() with the given lock_mode. - */ -void -xfs_iunlock_map_shared( - xfs_inode_t *ip, - unsigned int lock_mode) -{ - xfs_iunlock(ip, lock_mode); -} - -/* - * The xfs inode contains 2 locks: a multi-reader lock called the - * i_iolock and a multi-reader lock called the i_lock. This routine - * allows either or both of the locks to be obtained. - * - * The 2 locks should always be ordered so that the IO lock is - * obtained first in order to prevent deadlock. - * - * ip -- the inode being locked - * lock_flags -- this parameter indicates the inode's locks - * to be locked. It can be: - * XFS_IOLOCK_SHARED, - * XFS_IOLOCK_EXCL, - * XFS_ILOCK_SHARED, - * XFS_ILOCK_EXCL, - * XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED, - * XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL, - * XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED, - * XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL - */ -void -xfs_ilock( - xfs_inode_t *ip, - uint lock_flags) -{ - /* - * You can't set both SHARED and EXCL for the same lock, - * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, - * and XFS_ILOCK_EXCL are valid values to set in lock_flags. - */ - ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != - (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); - ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != - (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); - ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); - - if (lock_flags & XFS_IOLOCK_EXCL) - mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); - else if (lock_flags & XFS_IOLOCK_SHARED) - mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); - - if (lock_flags & XFS_ILOCK_EXCL) - mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); - else if (lock_flags & XFS_ILOCK_SHARED) - mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); - - trace_xfs_ilock(ip, lock_flags, _RET_IP_); -} - -/* - * This is just like xfs_ilock(), except that the caller - * is guaranteed not to sleep. It returns 1 if it gets - * the requested locks and 0 otherwise. If the IO lock is - * obtained but the inode lock cannot be, then the IO lock - * is dropped before returning. - * - * ip -- the inode being locked - * lock_flags -- this parameter indicates the inode's locks to be - * to be locked. See the comment for xfs_ilock() for a list - * of valid values. - */ -int -xfs_ilock_nowait( - xfs_inode_t *ip, - uint lock_flags) -{ - /* - * You can't set both SHARED and EXCL for the same lock, - * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, - * and XFS_ILOCK_EXCL are valid values to set in lock_flags. - */ - ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != - (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); - ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != - (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); - ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); - - if (lock_flags & XFS_IOLOCK_EXCL) { - if (!mrtryupdate(&ip->i_iolock)) - goto out; - } else if (lock_flags & XFS_IOLOCK_SHARED) { - if (!mrtryaccess(&ip->i_iolock)) - goto out; - } - if (lock_flags & XFS_ILOCK_EXCL) { - if (!mrtryupdate(&ip->i_lock)) - goto out_undo_iolock; - } else if (lock_flags & XFS_ILOCK_SHARED) { - if (!mrtryaccess(&ip->i_lock)) - goto out_undo_iolock; - } - trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_); - return 1; - - out_undo_iolock: - if (lock_flags & XFS_IOLOCK_EXCL) - mrunlock_excl(&ip->i_iolock); - else if (lock_flags & XFS_IOLOCK_SHARED) - mrunlock_shared(&ip->i_iolock); - out: - return 0; -} - -/* - * xfs_iunlock() is used to drop the inode locks acquired with - * xfs_ilock() and xfs_ilock_nowait(). The caller must pass - * in the flags given to xfs_ilock() or xfs_ilock_nowait() so - * that we know which locks to drop. - * - * ip -- the inode being unlocked - * lock_flags -- this parameter indicates the inode's locks to be - * to be unlocked. See the comment for xfs_ilock() for a list - * of valid values for this parameter. - * - */ -void -xfs_iunlock( - xfs_inode_t *ip, - uint lock_flags) -{ - /* - * You can't set both SHARED and EXCL for the same lock, - * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, - * and XFS_ILOCK_EXCL are valid values to set in lock_flags. - */ - ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != - (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); - ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != - (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); - ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); - ASSERT(lock_flags != 0); - - if (lock_flags & XFS_IOLOCK_EXCL) - mrunlock_excl(&ip->i_iolock); - else if (lock_flags & XFS_IOLOCK_SHARED) - mrunlock_shared(&ip->i_iolock); - - if (lock_flags & XFS_ILOCK_EXCL) - mrunlock_excl(&ip->i_lock); - else if (lock_flags & XFS_ILOCK_SHARED) - mrunlock_shared(&ip->i_lock); - - trace_xfs_iunlock(ip, lock_flags, _RET_IP_); -} - -/* - * give up write locks. the i/o lock cannot be held nested - * if it is being demoted. - */ -void -xfs_ilock_demote( - xfs_inode_t *ip, - uint lock_flags) -{ - ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)); - ASSERT((lock_flags & ~(XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)) == 0); - - if (lock_flags & XFS_ILOCK_EXCL) - mrdemote(&ip->i_lock); - if (lock_flags & XFS_IOLOCK_EXCL) - mrdemote(&ip->i_iolock); - - trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_); -} - -#ifdef DEBUG -int -xfs_isilocked( - xfs_inode_t *ip, - uint lock_flags) -{ - if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) { - if (!(lock_flags & XFS_ILOCK_SHARED)) - return !!ip->i_lock.mr_writer; - return rwsem_is_locked(&ip->i_lock.mr_lock); - } - - if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) { - if (!(lock_flags & XFS_IOLOCK_SHARED)) - return !!ip->i_iolock.mr_writer; - return rwsem_is_locked(&ip->i_iolock.mr_lock); - } - - ASSERT(0); - return 0; -} -#endif - -void -__xfs_iflock( - struct xfs_inode *ip) -{ - wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT); - DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT); - - do { - prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE); - if (xfs_isiflocked(ip)) - io_schedule(); - } while (!xfs_iflock_nowait(ip)); - - finish_wait(wq, &wait.wait); -} diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 2778258fcfa..66282dcb821 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -45,6 +45,7 @@ #include "xfs_filestream.h" #include "xfs_vnodeops.h" #include "xfs_trace.h" +#include "xfs_icache.h" kmem_zone_t *xfs_ifork_zone; kmem_zone_t *xfs_inode_zone; @@ -74,6 +75,256 @@ xfs_get_extsz_hint( return 0; } +/* + * This is a wrapper routine around the xfs_ilock() routine used to centralize + * some grungy code. It is used in places that wish to lock the inode solely + * for reading the extents. The reason these places can't just call + * xfs_ilock(SHARED) is that the inode lock also guards to bringing in of the + * extents from disk for a file in b-tree format. If the inode is in b-tree + * format, then we need to lock the inode exclusively until the extents are read + * in. Locking it exclusively all the time would limit our parallelism + * unnecessarily, though. What we do instead is check to see if the extents + * have been read in yet, and only lock the inode exclusively if they have not. + * + * The function returns a value which should be given to the corresponding + * xfs_iunlock_map_shared(). This value is the mode in which the lock was + * actually taken. + */ +uint +xfs_ilock_map_shared( + xfs_inode_t *ip) +{ + uint lock_mode; + + if ((ip->i_d.di_format == XFS_DINODE_FMT_BTREE) && + ((ip->i_df.if_flags & XFS_IFEXTENTS) == 0)) { + lock_mode = XFS_ILOCK_EXCL; + } else { + lock_mode = XFS_ILOCK_SHARED; + } + + xfs_ilock(ip, lock_mode); + + return lock_mode; +} + +/* + * This is simply the unlock routine to go with xfs_ilock_map_shared(). + * All it does is call xfs_iunlock() with the given lock_mode. + */ +void +xfs_iunlock_map_shared( + xfs_inode_t *ip, + unsigned int lock_mode) +{ + xfs_iunlock(ip, lock_mode); +} + +/* + * The xfs inode contains 2 locks: a multi-reader lock called the + * i_iolock and a multi-reader lock called the i_lock. This routine + * allows either or both of the locks to be obtained. + * + * The 2 locks should always be ordered so that the IO lock is + * obtained first in order to prevent deadlock. + * + * ip -- the inode being locked + * lock_flags -- this parameter indicates the inode's locks + * to be locked. It can be: + * XFS_IOLOCK_SHARED, + * XFS_IOLOCK_EXCL, + * XFS_ILOCK_SHARED, + * XFS_ILOCK_EXCL, + * XFS_IOLOCK_SHARED | XFS_ILOCK_SHARED, + * XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL, + * XFS_IOLOCK_EXCL | XFS_ILOCK_SHARED, + * XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL + */ +void +xfs_ilock( + xfs_inode_t *ip, + uint lock_flags) +{ + trace_xfs_ilock(ip, lock_flags, _RET_IP_); + + /* + * You can't set both SHARED and EXCL for the same lock, + * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, + * and XFS_ILOCK_EXCL are valid values to set in lock_flags. + */ + ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != + (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); + ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != + (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); + ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); + + if (lock_flags & XFS_IOLOCK_EXCL) + mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); + else if (lock_flags & XFS_IOLOCK_SHARED) + mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); + + if (lock_flags & XFS_ILOCK_EXCL) + mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); + else if (lock_flags & XFS_ILOCK_SHARED) + mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); +} + +/* + * This is just like xfs_ilock(), except that the caller + * is guaranteed not to sleep. It returns 1 if it gets + * the requested locks and 0 otherwise. If the IO lock is + * obtained but the inode lock cannot be, then the IO lock + * is dropped before returning. + * + * ip -- the inode being locked + * lock_flags -- this parameter indicates the inode's locks to be + * to be locked. See the comment for xfs_ilock() for a list + * of valid values. + */ +int +xfs_ilock_nowait( + xfs_inode_t *ip, + uint lock_flags) +{ + trace_xfs_ilock_nowait(ip, lock_flags, _RET_IP_); + + /* + * You can't set both SHARED and EXCL for the same lock, + * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, + * and XFS_ILOCK_EXCL are valid values to set in lock_flags. + */ + ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != + (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); + ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != + (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); + ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); + + if (lock_flags & XFS_IOLOCK_EXCL) { + if (!mrtryupdate(&ip->i_iolock)) + goto out; + } else if (lock_flags & XFS_IOLOCK_SHARED) { + if (!mrtryaccess(&ip->i_iolock)) + goto out; + } + if (lock_flags & XFS_ILOCK_EXCL) { + if (!mrtryupdate(&ip->i_lock)) + goto out_undo_iolock; + } else if (lock_flags & XFS_ILOCK_SHARED) { + if (!mrtryaccess(&ip->i_lock)) + goto out_undo_iolock; + } + return 1; + + out_undo_iolock: + if (lock_flags & XFS_IOLOCK_EXCL) + mrunlock_excl(&ip->i_iolock); + else if (lock_flags & XFS_IOLOCK_SHARED) + mrunlock_shared(&ip->i_iolock); + out: + return 0; +} + +/* + * xfs_iunlock() is used to drop the inode locks acquired with + * xfs_ilock() and xfs_ilock_nowait(). The caller must pass + * in the flags given to xfs_ilock() or xfs_ilock_nowait() so + * that we know which locks to drop. + * + * ip -- the inode being unlocked + * lock_flags -- this parameter indicates the inode's locks to be + * to be unlocked. See the comment for xfs_ilock() for a list + * of valid values for this parameter. + * + */ +void +xfs_iunlock( + xfs_inode_t *ip, + uint lock_flags) +{ + /* + * You can't set both SHARED and EXCL for the same lock, + * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, + * and XFS_ILOCK_EXCL are valid values to set in lock_flags. + */ + ASSERT((lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) != + (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)); + ASSERT((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) != + (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); + ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); + ASSERT(lock_flags != 0); + + if (lock_flags & XFS_IOLOCK_EXCL) + mrunlock_excl(&ip->i_iolock); + else if (lock_flags & XFS_IOLOCK_SHARED) + mrunlock_shared(&ip->i_iolock); + + if (lock_flags & XFS_ILOCK_EXCL) + mrunlock_excl(&ip->i_lock); + else if (lock_flags & XFS_ILOCK_SHARED) + mrunlock_shared(&ip->i_lock); + + trace_xfs_iunlock(ip, lock_flags, _RET_IP_); +} + +/* + * give up write locks. the i/o lock cannot be held nested + * if it is being demoted. + */ +void +xfs_ilock_demote( + xfs_inode_t *ip, + uint lock_flags) +{ + ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)); + ASSERT((lock_flags & ~(XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)) == 0); + + if (lock_flags & XFS_ILOCK_EXCL) + mrdemote(&ip->i_lock); + if (lock_flags & XFS_IOLOCK_EXCL) + mrdemote(&ip->i_iolock); + + trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_); +} + +#ifdef DEBUG +int +xfs_isilocked( + xfs_inode_t *ip, + uint lock_flags) +{ + if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) { + if (!(lock_flags & XFS_ILOCK_SHARED)) + return !!ip->i_lock.mr_writer; + return rwsem_is_locked(&ip->i_lock.mr_lock); + } + + if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) { + if (!(lock_flags & XFS_IOLOCK_SHARED)) + return !!ip->i_iolock.mr_writer; + return rwsem_is_locked(&ip->i_iolock.mr_lock); + } + + ASSERT(0); + return 0; +} +#endif + +void +__xfs_iflock( + struct xfs_inode *ip) +{ + wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT); + DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT); + + do { + prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE); + if (xfs_isiflocked(ip)) + io_schedule(); + } while (!xfs_iflock_nowait(ip)); + + finish_wait(wq, &wait.wait); +} + #ifdef DEBUG /* * Make sure that the extents in the given memory buffer @@ -131,6 +382,65 @@ xfs_inobp_check( } #endif +static void +xfs_inode_buf_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + int i; + int ni; + + /* + * Validate the magic number and version of every inode in the buffer + */ + ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock; + for (i = 0; i < ni; i++) { + int di_ok; + xfs_dinode_t *dip; + + dip = (struct xfs_dinode *)xfs_buf_offset(bp, + (i << mp->m_sb.sb_inodelog)); + di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) && + XFS_DINODE_GOOD_VERSION(dip->di_version); + if (unlikely(XFS_TEST_ERROR(!di_ok, mp, + XFS_ERRTAG_ITOBP_INOTOBP, + XFS_RANDOM_ITOBP_INOTOBP))) { + xfs_buf_ioerror(bp, EFSCORRUPTED); + XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_HIGH, + mp, dip); +#ifdef DEBUG + xfs_emerg(mp, + "bad inode magic/vsn daddr %lld #%d (magic=%x)", + (unsigned long long)bp->b_bn, i, + be16_to_cpu(dip->di_magic)); + ASSERT(0); +#endif + } + } + xfs_inobp_check(mp, bp); +} + + +static void +xfs_inode_buf_read_verify( + struct xfs_buf *bp) +{ + xfs_inode_buf_verify(bp); +} + +static void +xfs_inode_buf_write_verify( + struct xfs_buf *bp) +{ + xfs_inode_buf_verify(bp); +} + +const struct xfs_buf_ops xfs_inode_buf_ops = { + .verify_read = xfs_inode_buf_read_verify, + .verify_write = xfs_inode_buf_write_verify, +}; + + /* * This routine is called to map an inode to the buffer containing the on-disk * version of the inode. It returns a pointer to the buffer containing the @@ -145,71 +455,33 @@ xfs_imap_to_bp( struct xfs_mount *mp, struct xfs_trans *tp, struct xfs_imap *imap, - struct xfs_dinode **dipp, + struct xfs_dinode **dipp, struct xfs_buf **bpp, uint buf_flags, uint iget_flags) { struct xfs_buf *bp; int error; - int i; - int ni; buf_flags |= XBF_UNMAPPED; error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno, - (int)imap->im_len, buf_flags, &bp); + (int)imap->im_len, buf_flags, &bp, + &xfs_inode_buf_ops); if (error) { - if (error != EAGAIN) { - xfs_warn(mp, - "%s: xfs_trans_read_buf() returned error %d.", - __func__, error); - } else { + if (error == EAGAIN) { ASSERT(buf_flags & XBF_TRYLOCK); + return error; } - return error; - } - - /* - * Validate the magic number and version of every inode in the buffer - * (if DEBUG kernel) or the first inode in the buffer, otherwise. - */ -#ifdef DEBUG - ni = BBTOB(imap->im_len) >> mp->m_sb.sb_inodelog; -#else /* usual case */ - ni = 1; -#endif - for (i = 0; i < ni; i++) { - int di_ok; - xfs_dinode_t *dip; + if (error == EFSCORRUPTED && + (iget_flags & XFS_IGET_UNTRUSTED)) + return XFS_ERROR(EINVAL); - dip = (xfs_dinode_t *)xfs_buf_offset(bp, - (i << mp->m_sb.sb_inodelog)); - di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) && - XFS_DINODE_GOOD_VERSION(dip->di_version); - if (unlikely(XFS_TEST_ERROR(!di_ok, mp, - XFS_ERRTAG_ITOBP_INOTOBP, - XFS_RANDOM_ITOBP_INOTOBP))) { - if (iget_flags & XFS_IGET_UNTRUSTED) { - xfs_trans_brelse(tp, bp); - return XFS_ERROR(EINVAL); - } - XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_HIGH, - mp, dip); -#ifdef DEBUG - xfs_emerg(mp, - "bad inode magic/vsn daddr %lld #%d (magic=%x)", - (unsigned long long)imap->im_blkno, i, - be16_to_cpu(dip->di_magic)); - ASSERT(0); -#endif - xfs_trans_brelse(tp, bp); - return XFS_ERROR(EFSCORRUPTED); - } + xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.", + __func__, error); + return error; } - xfs_inobp_check(mp, bp); - *bpp = bp; *dipp = (struct xfs_dinode *)xfs_buf_offset(bp, imap->im_boffset); return 0; @@ -853,16 +1125,16 @@ xfs_iread_extents( * set according to the contents of the given cred structure. * * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc() - * has a free inode available, call xfs_iget() - * to obtain the in-core version of the allocated inode. Finally, - * fill in the inode and log its initial contents. In this case, - * ialloc_context would be set to NULL and call_again set to false. + * has a free inode available, call xfs_iget() to obtain the in-core + * version of the allocated inode. Finally, fill in the inode and + * log its initial contents. In this case, ialloc_context would be + * set to NULL. * - * If xfs_dialloc() does not have an available inode, - * it will replenish its supply by doing an allocation. Since we can - * only do one allocation within a transaction without deadlocks, we - * must commit the current transaction before returning the inode itself. - * In this case, therefore, we will set call_again to true and return. + * If xfs_dialloc() does not have an available inode, it will replenish + * its supply by doing an allocation. Since we can only do one + * allocation within a transaction without deadlocks, we must commit + * the current transaction before returning the inode itself. + * In this case, therefore, we will set ialloc_context and return. * The caller should then commit the current transaction, start a new * transaction, and call xfs_ialloc() again to actually get the inode. * @@ -1509,10 +1781,23 @@ xfs_ifree_cluster( * to mark all the active inodes on the buffer stale. */ bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno, - mp->m_bsize * blks_per_cluster, 0); + mp->m_bsize * blks_per_cluster, + XBF_UNMAPPED); if (!bp) return ENOMEM; + + /* + * This buffer may not have been correctly initialised as we + * didn't read it from disk. That's not important because we are + * only using to mark the buffer as stale in the log, and to + * attach stale cached inodes on it. That means it will never be + * dispatched for IO. If it is, we want to know about it, and we + * want it to fail. We can acheive this by adding a write + * verifier to the buffer. + */ + bp->b_ops = &xfs_inode_buf_ops; + /* * Walk the inodes already attached to the buffer and mark them * stale. These will all have the flush locks held, so an @@ -3660,3 +3945,40 @@ xfs_iext_irec_update_extoffs( ifp->if_u1.if_ext_irec[i].er_extoff += ext_diff; } } + +/* + * Test whether it is appropriate to check an inode for and free post EOF + * blocks. The 'force' parameter determines whether we should also consider + * regular files that are marked preallocated or append-only. + */ +bool +xfs_can_free_eofblocks(struct xfs_inode *ip, bool force) +{ + /* prealloc/delalloc exists only on regular files */ + if (!S_ISREG(ip->i_d.di_mode)) + return false; + + /* + * Zero sized files with no cached pages and delalloc blocks will not + * have speculative prealloc/delalloc blocks to remove. + */ + if (VFS_I(ip)->i_size == 0 && + VN_CACHED(VFS_I(ip)) == 0 && + ip->i_delayed_blks == 0) + return false; + + /* If we haven't read in the extent list, then don't do it now. */ + if (!(ip->i_df.if_flags & XFS_IFEXTENTS)) + return false; + + /* + * Do not free real preallocated or append-only files unless the file + * has delalloc blocks and we are forced to remove them. + */ + if (ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) + if (!force || ip->i_delayed_blks == 0) + return false; + + return true; +} + diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 94b32f906e7..22baf6ea4fa 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -496,11 +496,10 @@ static inline int xfs_isiflocked(struct xfs_inode *ip) (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \ ((pip)->i_d.di_mode & S_ISGID)) + /* - * xfs_iget.c prototypes. + * xfs_inode.c prototypes. */ -int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t, - uint, uint, xfs_inode_t **); void xfs_ilock(xfs_inode_t *, uint); int xfs_ilock_nowait(xfs_inode_t *, uint); void xfs_iunlock(xfs_inode_t *, uint); @@ -508,11 +507,6 @@ void xfs_ilock_demote(xfs_inode_t *, uint); int xfs_isilocked(xfs_inode_t *, uint); uint xfs_ilock_map_shared(xfs_inode_t *); void xfs_iunlock_map_shared(xfs_inode_t *, uint); -void xfs_inode_free(struct xfs_inode *ip); - -/* - * xfs_inode.c prototypes. - */ int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t, xfs_nlink_t, xfs_dev_t, prid_t, int, struct xfs_buf **, xfs_inode_t **); @@ -591,6 +585,7 @@ void xfs_iext_irec_compact(xfs_ifork_t *); void xfs_iext_irec_compact_pages(xfs_ifork_t *); void xfs_iext_irec_compact_full(xfs_ifork_t *); void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int); +bool xfs_can_free_eofblocks(struct xfs_inode *, bool); #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) @@ -603,5 +598,6 @@ void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *); extern struct kmem_zone *xfs_ifork_zone; extern struct kmem_zone *xfs_inode_zone; extern struct kmem_zone *xfs_ili_zone; +extern const struct xfs_buf_ops xfs_inode_buf_ops; #endif /* __XFS_INODE_H__ */ diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 8305f2ac677..c1c3ef88a26 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -42,6 +42,7 @@ #include "xfs_inode_item.h" #include "xfs_export.h" #include "xfs_trace.h" +#include "xfs_icache.h" #include <linux/capability.h> #include <linux/dcache.h> @@ -70,7 +71,7 @@ xfs_find_handle( int hsize; xfs_handle_t handle; struct inode *inode; - struct fd f; + struct fd f = {0}; struct path path; int error; struct xfs_inode *ip; @@ -1602,6 +1603,26 @@ xfs_file_ioctl( error = xfs_errortag_clearall(mp, 1); return -error; + case XFS_IOC_FREE_EOFBLOCKS: { + struct xfs_eofblocks eofb; + + if (copy_from_user(&eofb, arg, sizeof(eofb))) + return -XFS_ERROR(EFAULT); + + if (eofb.eof_version != XFS_EOFBLOCKS_VERSION) + return -XFS_ERROR(EINVAL); + + if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID) + return -XFS_ERROR(EINVAL); + + if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) || + memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64))) + return -XFS_ERROR(EINVAL); + + error = xfs_icache_free_eofblocks(mp, &eofb); + return -error; + } + default: return -ENOTTY; } diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 973dff6ad93..add06b4e9a6 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -41,6 +41,7 @@ #include "xfs_utils.h" #include "xfs_iomap.h" #include "xfs_trace.h" +#include "xfs_icache.h" #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ @@ -373,7 +374,7 @@ xfs_iomap_write_delay( xfs_extlen_t extsz; int nimaps; xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS]; - int prealloc, flushed = 0; + int prealloc; int error; ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); @@ -434,31 +435,29 @@ retry: } /* - * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. For - * ENOSPC, * flush all other inodes with delalloc blocks to free up - * some of the excess reserved metadata space. For both cases, retry + * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. Retry * without EOF preallocation. */ if (nimaps == 0) { trace_xfs_delalloc_enospc(ip, offset, count); - if (flushed) - return XFS_ERROR(error ? error : ENOSPC); - - if (error == ENOSPC) { - xfs_iunlock(ip, XFS_ILOCK_EXCL); - xfs_flush_inodes(ip); - xfs_ilock(ip, XFS_ILOCK_EXCL); + if (prealloc) { + prealloc = 0; + error = 0; + goto retry; } - - flushed = 1; - error = 0; - prealloc = 0; - goto retry; + return XFS_ERROR(error ? error : ENOSPC); } if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip))) return xfs_alert_fsblock_zero(ip, &imap[0]); + /* + * Tag the inode as speculatively preallocated so we can reclaim this + * space on demand, if necessary. + */ + if (prealloc) + xfs_inode_set_eofblocks_tag(ip); + *ret_imap = imap[0]; return 0; } @@ -584,7 +583,9 @@ xfs_iomap_write_allocate( * pointer that the caller gave to us. */ error = xfs_bmapi_write(tp, ip, map_start_fsb, - count_fsb, 0, &first_block, 1, + count_fsb, + XFS_BMAPI_STACK_SWITCH, + &first_block, 1, imap, &nimaps, &free_list); if (error) goto trans_cancel; diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 4e00cf091d2..d82efaa2ac7 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -38,6 +38,7 @@ #include "xfs_vnodeops.h" #include "xfs_inode_item.h" #include "xfs_trace.h" +#include "xfs_icache.h" #include <linux/capability.h> #include <linux/xattr.h> @@ -779,8 +780,8 @@ xfs_setattr_size( * care about here. */ if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) { - error = xfs_flush_pages(ip, ip->i_d.di_size, newsize, 0, - FI_NONE); + error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, + ip->i_d.di_size, newsize); if (error) goto out_unlock; } @@ -854,6 +855,9 @@ xfs_setattr_size( * and do not wait the usual (long) time for writeout. */ xfs_iflags_set(ip, XFS_ITRUNCATED); + + /* A truncate down always removes post-EOF blocks. */ + xfs_inode_clear_eofblocks_tag(ip); } if (mask & ATTR_CTIME) { diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index 01d10a66e30..2ea7d402188 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -34,6 +34,7 @@ #include "xfs_error.h" #include "xfs_btree.h" #include "xfs_trace.h" +#include "xfs_icache.h" STATIC int xfs_internal_inum( @@ -395,7 +396,8 @@ xfs_bulkstat( if (xfs_inobt_maskn(chunkidx, nicluster) & ~r.ir_free) xfs_btree_reada_bufs(mp, agno, - agbno, nbcluster); + agbno, nbcluster, + &xfs_inode_buf_ops); } irbp->ir_startino = r.ir_startino; irbp->ir_freecount = r.ir_freecount; diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h index 828662f70d6..fe7e4df85a7 100644 --- a/fs/xfs/xfs_linux.h +++ b/fs/xfs/xfs_linux.h @@ -44,6 +44,7 @@ #include <linux/kernel.h> #include <linux/blkdev.h> #include <linux/slab.h> +#include <linux/crc32c.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/file.h> @@ -118,6 +119,7 @@ #define xfs_rotorstep xfs_params.rotorstep.val #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val +#define xfs_eofb_secs xfs_params.eofb_timer.val #define current_cpu() (raw_smp_processor_id()) #define current_pid() (current->pid) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 7f4f9370d0e..46bd9d52ab5 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -34,6 +34,8 @@ #include "xfs_dinode.h" #include "xfs_inode.h" #include "xfs_trace.h" +#include "xfs_fsops.h" +#include "xfs_cksum.h" kmem_zone_t *xfs_log_ticket_zone; @@ -458,7 +460,8 @@ xfs_log_reserve( tic->t_trans_type = t_type; *ticp = tic; - xlog_grant_push_ail(log, tic->t_unit_res * tic->t_cnt); + xlog_grant_push_ail(log, tic->t_cnt ? tic->t_unit_res * tic->t_cnt + : tic->t_unit_res); trace_xfs_log_reserve(log, tic); @@ -679,25 +682,29 @@ out: } /* - * Finish the recovery of the file system. This is separate from - * the xfs_log_mount() call, because it depends on the code in - * xfs_mountfs() to read in the root and real-time bitmap inodes - * between calling xfs_log_mount() and here. + * Finish the recovery of the file system. This is separate from the + * xfs_log_mount() call, because it depends on the code in xfs_mountfs() to read + * in the root and real-time bitmap inodes between calling xfs_log_mount() and + * here. * - * mp - ubiquitous xfs mount point structure + * If we finish recovery successfully, start the background log work. If we are + * not doing recovery, then we have a RO filesystem and we don't need to start + * it. */ int xfs_log_mount_finish(xfs_mount_t *mp) { - int error; + int error = 0; - if (!(mp->m_flags & XFS_MOUNT_NORECOVERY)) + if (!(mp->m_flags & XFS_MOUNT_NORECOVERY)) { error = xlog_recover_finish(mp->m_log); - else { - error = 0; + if (!error) + xfs_log_work_queue(mp); + } else { ASSERT(mp->m_flags & XFS_MOUNT_RDONLY); } + return error; } @@ -850,15 +857,49 @@ xfs_log_unmount_write(xfs_mount_t *mp) } /* xfs_log_unmount_write */ /* - * Deallocate log structures for unmount/relocation. + * Empty the log for unmount/freeze. + * + * To do this, we first need to shut down the background log work so it is not + * trying to cover the log as we clean up. We then need to unpin all objects in + * the log so we can then flush them out. Once they have completed their IO and + * run the callbacks removing themselves from the AIL, we can write the unmount + * record. + */ +void +xfs_log_quiesce( + struct xfs_mount *mp) +{ + cancel_delayed_work_sync(&mp->m_log->l_work); + xfs_log_force(mp, XFS_LOG_SYNC); + + /* + * The superblock buffer is uncached and while xfs_ail_push_all_sync() + * will push it, xfs_wait_buftarg() will not wait for it. Further, + * xfs_buf_iowait() cannot be used because it was pushed with the + * XBF_ASYNC flag set, so we need to use a lock/unlock pair to wait for + * the IO to complete. + */ + xfs_ail_push_all_sync(mp->m_ail); + xfs_wait_buftarg(mp->m_ddev_targp); + xfs_buf_lock(mp->m_sb_bp); + xfs_buf_unlock(mp->m_sb_bp); + + xfs_log_unmount_write(mp); +} + +/* + * Shut down and release the AIL and Log. * - * We need to stop the aild from running before we destroy - * and deallocate the log as the aild references the log. + * During unmount, we need to ensure we flush all the dirty metadata objects + * from the AIL so that the log is empty before we write the unmount record to + * the log. Once this is done, we can tear down the AIL and the log. */ void -xfs_log_unmount(xfs_mount_t *mp) +xfs_log_unmount( + struct xfs_mount *mp) { - cancel_delayed_work_sync(&mp->m_sync_work); + xfs_log_quiesce(mp); + xfs_trans_ail_destroy(mp); xlog_dealloc_log(mp->m_log); } @@ -1090,8 +1131,7 @@ xlog_iodone(xfs_buf_t *bp) * with it being freed after writing the unmount record to the * log. */ - -} /* xlog_iodone */ +} /* * Return size of each in-core log record buffer. @@ -1161,6 +1201,40 @@ done: } /* xlog_get_iclog_buffer_size */ +void +xfs_log_work_queue( + struct xfs_mount *mp) +{ + queue_delayed_work(mp->m_log_workqueue, &mp->m_log->l_work, + msecs_to_jiffies(xfs_syncd_centisecs * 10)); +} + +/* + * Every sync period we need to unpin all items in the AIL and push them to + * disk. If there is nothing dirty, then we might need to cover the log to + * indicate that the filesystem is idle. + */ +void +xfs_log_worker( + struct work_struct *work) +{ + struct xlog *log = container_of(to_delayed_work(work), + struct xlog, l_work); + struct xfs_mount *mp = log->l_mp; + + /* dgc: errors ignored - not fatal and nowhere to report them */ + if (xfs_log_need_covered(mp)) + xfs_fs_log_dummy(mp); + else + xfs_log_force(mp, 0); + + /* start pushing all the metadata that is currently dirty */ + xfs_ail_push_all(mp->m_ail); + + /* queue us up again */ + xfs_log_work_queue(mp); +} + /* * This routine initializes some of the log structure for a given mount point. * Its primary purpose is to fill in enough, so recovery can occur. However, @@ -1195,6 +1269,7 @@ xlog_alloc_log( log->l_logBBsize = num_bblks; log->l_covered_state = XLOG_STATE_COVER_IDLE; log->l_flags |= XLOG_ACTIVE_RECOVERY; + INIT_DELAYED_WORK(&log->l_work, xfs_log_worker); log->l_prev_block = -1; /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ @@ -1417,6 +1492,84 @@ xlog_grant_push_ail( } /* + * Stamp cycle number in every block + */ +STATIC void +xlog_pack_data( + struct xlog *log, + struct xlog_in_core *iclog, + int roundoff) +{ + int i, j, k; + int size = iclog->ic_offset + roundoff; + __be32 cycle_lsn; + xfs_caddr_t dp; + + cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn); + + dp = iclog->ic_datap; + for (i = 0; i < BTOBB(size); i++) { + if (i >= (XLOG_HEADER_CYCLE_SIZE / BBSIZE)) + break; + iclog->ic_header.h_cycle_data[i] = *(__be32 *)dp; + *(__be32 *)dp = cycle_lsn; + dp += BBSIZE; + } + + if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { + xlog_in_core_2_t *xhdr = iclog->ic_data; + + for ( ; i < BTOBB(size); i++) { + j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); + k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); + xhdr[j].hic_xheader.xh_cycle_data[k] = *(__be32 *)dp; + *(__be32 *)dp = cycle_lsn; + dp += BBSIZE; + } + + for (i = 1; i < log->l_iclog_heads; i++) + xhdr[i].hic_xheader.xh_cycle = cycle_lsn; + } +} + +/* + * Calculate the checksum for a log buffer. + * + * This is a little more complicated than it should be because the various + * headers and the actual data are non-contiguous. + */ +__le32 +xlog_cksum( + struct xlog *log, + struct xlog_rec_header *rhead, + char *dp, + int size) +{ + __uint32_t crc; + + /* first generate the crc for the record header ... */ + crc = xfs_start_cksum((char *)rhead, + sizeof(struct xlog_rec_header), + offsetof(struct xlog_rec_header, h_crc)); + + /* ... then for additional cycle data for v2 logs ... */ + if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { + union xlog_in_core2 *xhdr = (union xlog_in_core2 *)rhead; + int i; + + for (i = 1; i < log->l_iclog_heads; i++) { + crc = crc32c(crc, &xhdr[i].hic_xheader, + sizeof(struct xlog_rec_ext_header)); + } + } + + /* ... and finally for the payload */ + crc = crc32c(crc, dp, size); + + return xfs_end_cksum(crc); +} + +/* * The bdstrat callback function for log bufs. This gives us a central * place to trap bufs in case we get hit by a log I/O error and need to * shutdown. Actually, in practice, even when we didn't get a log error, @@ -1476,7 +1629,6 @@ xlog_sync( struct xlog *log, struct xlog_in_core *iclog) { - xfs_caddr_t dptr; /* pointer to byte sized element */ xfs_buf_t *bp; int i; uint count; /* byte count of bwrite */ @@ -1485,6 +1637,7 @@ xlog_sync( int split = 0; /* split write into two regions */ int error; int v2 = xfs_sb_version_haslogv2(&log->l_mp->m_sb); + int size; XFS_STATS_INC(xs_log_writes); ASSERT(atomic_read(&iclog->ic_refcnt) == 0); @@ -1515,13 +1668,10 @@ xlog_sync( xlog_pack_data(log, iclog, roundoff); /* real byte length */ - if (v2) { - iclog->ic_header.h_len = - cpu_to_be32(iclog->ic_offset + roundoff); - } else { - iclog->ic_header.h_len = - cpu_to_be32(iclog->ic_offset); - } + size = iclog->ic_offset; + if (v2) + size += roundoff; + iclog->ic_header.h_len = cpu_to_be32(size); bp = iclog->ic_bp; XFS_BUF_SET_ADDR(bp, BLOCK_LSN(be64_to_cpu(iclog->ic_header.h_lsn))); @@ -1530,12 +1680,36 @@ xlog_sync( /* Do we need to split this write into 2 parts? */ if (XFS_BUF_ADDR(bp) + BTOBB(count) > log->l_logBBsize) { + char *dptr; + split = count - (BBTOB(log->l_logBBsize - XFS_BUF_ADDR(bp))); count = BBTOB(log->l_logBBsize - XFS_BUF_ADDR(bp)); - iclog->ic_bwritecnt = 2; /* split into 2 writes */ + iclog->ic_bwritecnt = 2; + + /* + * Bump the cycle numbers at the start of each block in the + * part of the iclog that ends up in the buffer that gets + * written to the start of the log. + * + * Watch out for the header magic number case, though. + */ + dptr = (char *)&iclog->ic_header + count; + for (i = 0; i < split; i += BBSIZE) { + __uint32_t cycle = be32_to_cpu(*(__be32 *)dptr); + if (++cycle == XLOG_HEADER_MAGIC_NUM) + cycle++; + *(__be32 *)dptr = cpu_to_be32(cycle); + + dptr += BBSIZE; + } } else { iclog->ic_bwritecnt = 1; } + + /* calculcate the checksum */ + iclog->ic_header.h_crc = xlog_cksum(log, &iclog->ic_header, + iclog->ic_datap, size); + bp->b_io_length = BTOBB(count); bp->b_fspriv = iclog; XFS_BUF_ZEROFLAGS(bp); @@ -1589,19 +1763,6 @@ xlog_sync( bp->b_flags |= XBF_SYNCIO; if (log->l_mp->m_flags & XFS_MOUNT_BARRIER) bp->b_flags |= XBF_FUA; - dptr = bp->b_addr; - /* - * Bump the cycle numbers at the start of each block - * since this part of the buffer is at the start of - * a new cycle. Watch out for the header magic number - * case, though. - */ - for (i = 0; i < split; i += BBSIZE) { - be32_add_cpu((__be32 *)dptr, 1); - if (be32_to_cpu(*(__be32 *)dptr) == XLOG_HEADER_MAGIC_NUM) - be32_add_cpu((__be32 *)dptr, 1); - dptr += BBSIZE; - } ASSERT(XFS_BUF_ADDR(bp) <= log->l_logBBsize-1); ASSERT(XFS_BUF_ADDR(bp) + BTOBB(count) <= log->l_logBBsize); @@ -1618,7 +1779,6 @@ xlog_sync( return 0; } /* xlog_sync */ - /* * Deallocate a log structure */ @@ -2387,14 +2547,27 @@ xlog_state_do_callback( /* - * update the last_sync_lsn before we drop the + * Completion of a iclog IO does not imply that + * a transaction has completed, as transactions + * can be large enough to span many iclogs. We + * cannot change the tail of the log half way + * through a transaction as this may be the only + * transaction in the log and moving th etail to + * point to the middle of it will prevent + * recovery from finding the start of the + * transaction. Hence we should only update the + * last_sync_lsn if this iclog contains + * transaction completion callbacks on it. + * + * We have to do this before we drop the * icloglock to ensure we are the only one that * can update it. */ ASSERT(XFS_LSN_CMP(atomic64_read(&log->l_last_sync_lsn), be64_to_cpu(iclog->ic_header.h_lsn)) <= 0); - atomic64_set(&log->l_last_sync_lsn, - be64_to_cpu(iclog->ic_header.h_lsn)); + if (iclog->ic_callback) + atomic64_set(&log->l_last_sync_lsn, + be64_to_cpu(iclog->ic_header.h_lsn)); } else ioerrors++; @@ -3700,3 +3873,4 @@ xlog_iclogs_empty( } while (iclog != log->l_iclog); return 1; } + diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h index 748d312850e..5caee96059d 100644 --- a/fs/xfs/xfs_log.h +++ b/fs/xfs/xfs_log.h @@ -181,5 +181,9 @@ int xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp, xfs_lsn_t *commit_lsn, int flags); bool xfs_log_item_in_current_chkpt(struct xfs_log_item *lip); +void xfs_log_work_queue(struct xfs_mount *mp); +void xfs_log_worker(struct work_struct *work); +void xfs_log_quiesce(struct xfs_mount *mp); + #endif #endif /* __XFS_LOG_H__ */ diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 18a801d76a4..16d8d12ea3b 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -139,7 +139,6 @@ static inline uint xlog_get_client_id(__be32 i) /* * Flags for log structure */ -#define XLOG_CHKSUM_MISMATCH 0x1 /* used only during recovery */ #define XLOG_ACTIVE_RECOVERY 0x2 /* in the middle of recovery */ #define XLOG_RECOVERY_NEEDED 0x4 /* log was recovered */ #define XLOG_IO_ERROR 0x8 /* log hit an I/O error, and being @@ -291,7 +290,7 @@ typedef struct xlog_rec_header { __be32 h_len; /* len in bytes; should be 64-bit aligned: 4 */ __be64 h_lsn; /* lsn of this LR : 8 */ __be64 h_tail_lsn; /* lsn of 1st LR w/ buffers not committed: 8 */ - __be32 h_chksum; /* may not be used; non-zero if used : 4 */ + __le32 h_crc; /* crc of log record : 4 */ __be32 h_prev_block; /* block number to previous LR : 4 */ __be32 h_num_logops; /* number of log operations in this LR : 4 */ __be32 h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; @@ -495,6 +494,7 @@ struct xlog { struct xfs_buf *l_xbuf; /* extra buffer for log * wrapping */ struct xfs_buftarg *l_targ; /* buftarg of log */ + struct delayed_work l_work; /* background flush work */ uint l_flags; uint l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */ struct list_head *l_buf_cancel_table; @@ -554,11 +554,9 @@ xlog_recover( extern int xlog_recover_finish( struct xlog *log); -extern void -xlog_pack_data( - struct xlog *log, - struct xlog_in_core *iclog, - int); + +extern __le32 xlog_cksum(struct xlog *log, struct xlog_rec_header *rhead, + char *dp, int size); extern kmem_zone_t *xfs_log_ticket_zone; struct xlog_ticket * diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 5da3ace352b..96fcbb85ff8 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -41,7 +41,9 @@ #include "xfs_trans_priv.h" #include "xfs_quota.h" #include "xfs_utils.h" +#include "xfs_cksum.h" #include "xfs_trace.h" +#include "xfs_icache.h" STATIC int xlog_find_zeroed( @@ -2143,7 +2145,7 @@ xlog_recover_buffer_pass2( buf_flags |= XBF_UNMAPPED; bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len, - buf_flags); + buf_flags, NULL); if (!bp) return XFS_ERROR(ENOMEM); error = bp->b_error; @@ -2236,7 +2238,8 @@ xlog_recover_inode_pass2( } trace_xfs_log_recover_inode_recover(log, in_f); - bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 0); + bp = xfs_buf_read(mp->m_ddev_targp, in_f->ilf_blkno, in_f->ilf_len, 0, + NULL); if (!bp) { error = ENOMEM; goto error; @@ -2547,7 +2550,8 @@ xlog_recover_dquot_pass2( ASSERT(dq_f->qlf_len == 1); error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dq_f->qlf_blkno, - XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp); + XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp, + NULL); if (error) return error; @@ -3213,80 +3217,58 @@ xlog_recover_process_iunlinks( mp->m_dmevmask = mp_dmevmask; } - -#ifdef DEBUG -STATIC void -xlog_pack_data_checksum( - struct xlog *log, - struct xlog_in_core *iclog, - int size) -{ - int i; - __be32 *up; - uint chksum = 0; - - up = (__be32 *)iclog->ic_datap; - /* divide length by 4 to get # words */ - for (i = 0; i < (size >> 2); i++) { - chksum ^= be32_to_cpu(*up); - up++; - } - iclog->ic_header.h_chksum = cpu_to_be32(chksum); -} -#else -#define xlog_pack_data_checksum(log, iclog, size) -#endif - /* - * Stamp cycle number in every block + * Upack the log buffer data and crc check it. If the check fails, issue a + * warning if and only if the CRC in the header is non-zero. This makes the + * check an advisory warning, and the zero CRC check will prevent failure + * warnings from being emitted when upgrading the kernel from one that does not + * add CRCs by default. + * + * When filesystems are CRC enabled, this CRC mismatch becomes a fatal log + * corruption failure */ -void -xlog_pack_data( - struct xlog *log, - struct xlog_in_core *iclog, - int roundoff) +STATIC int +xlog_unpack_data_crc( + struct xlog_rec_header *rhead, + xfs_caddr_t dp, + struct xlog *log) { - int i, j, k; - int size = iclog->ic_offset + roundoff; - __be32 cycle_lsn; - xfs_caddr_t dp; - - xlog_pack_data_checksum(log, iclog, size); - - cycle_lsn = CYCLE_LSN_DISK(iclog->ic_header.h_lsn); - - dp = iclog->ic_datap; - for (i = 0; i < BTOBB(size) && - i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { - iclog->ic_header.h_cycle_data[i] = *(__be32 *)dp; - *(__be32 *)dp = cycle_lsn; - dp += BBSIZE; - } - - if (xfs_sb_version_haslogv2(&log->l_mp->m_sb)) { - xlog_in_core_2_t *xhdr = iclog->ic_data; - - for ( ; i < BTOBB(size); i++) { - j = i / (XLOG_HEADER_CYCLE_SIZE / BBSIZE); - k = i % (XLOG_HEADER_CYCLE_SIZE / BBSIZE); - xhdr[j].hic_xheader.xh_cycle_data[k] = *(__be32 *)dp; - *(__be32 *)dp = cycle_lsn; - dp += BBSIZE; + __le32 crc; + + crc = xlog_cksum(log, rhead, dp, be32_to_cpu(rhead->h_len)); + if (crc != rhead->h_crc) { + if (rhead->h_crc || xfs_sb_version_hascrc(&log->l_mp->m_sb)) { + xfs_alert(log->l_mp, + "log record CRC mismatch: found 0x%x, expected 0x%x.\n", + le32_to_cpu(rhead->h_crc), + le32_to_cpu(crc)); + xfs_hex_dump(dp, 32); } - for (i = 1; i < log->l_iclog_heads; i++) { - xhdr[i].hic_xheader.xh_cycle = cycle_lsn; - } + /* + * If we've detected a log record corruption, then we can't + * recover past this point. Abort recovery if we are enforcing + * CRC protection by punting an error back up the stack. + */ + if (xfs_sb_version_hascrc(&log->l_mp->m_sb)) + return EFSCORRUPTED; } + + return 0; } -STATIC void +STATIC int xlog_unpack_data( struct xlog_rec_header *rhead, xfs_caddr_t dp, struct xlog *log) { int i, j, k; + int error; + + error = xlog_unpack_data_crc(rhead, dp, log); + if (error) + return error; for (i = 0; i < BTOBB(be32_to_cpu(rhead->h_len)) && i < (XLOG_HEADER_CYCLE_SIZE / BBSIZE); i++) { @@ -3303,6 +3285,8 @@ xlog_unpack_data( dp += BBSIZE; } } + + return 0; } STATIC int @@ -3434,9 +3418,13 @@ xlog_do_recovery_pass( if (error) goto bread_err2; - xlog_unpack_data(rhead, offset, log); - if ((error = xlog_recover_process_data(log, - rhash, rhead, offset, pass))) + error = xlog_unpack_data(rhead, offset, log); + if (error) + goto bread_err2; + + error = xlog_recover_process_data(log, + rhash, rhead, offset, pass); + if (error) goto bread_err2; blk_no += bblks + hblks; } @@ -3541,14 +3529,19 @@ xlog_do_recovery_pass( * - order is important. */ error = xlog_bread_offset(log, 0, - bblks - split_bblks, hbp, + bblks - split_bblks, dbp, offset + BBTOB(split_bblks)); if (error) goto bread_err2; } - xlog_unpack_data(rhead, offset, log); - if ((error = xlog_recover_process_data(log, rhash, - rhead, offset, pass))) + + error = xlog_unpack_data(rhead, offset, log); + if (error) + goto bread_err2; + + error = xlog_recover_process_data(log, rhash, + rhead, offset, pass); + if (error) goto bread_err2; blk_no += bblks; } @@ -3573,9 +3566,13 @@ xlog_do_recovery_pass( if (error) goto bread_err2; - xlog_unpack_data(rhead, offset, log); - if ((error = xlog_recover_process_data(log, rhash, - rhead, offset, pass))) + error = xlog_unpack_data(rhead, offset, log); + if (error) + goto bread_err2; + + error = xlog_recover_process_data(log, rhash, + rhead, offset, pass); + if (error) goto bread_err2; blk_no += bblks + hblks; } @@ -3689,13 +3686,14 @@ xlog_do_recover( /* * Now that we've finished replaying all buffer and inode - * updates, re-read in the superblock. + * updates, re-read in the superblock and reverify it. */ bp = xfs_getsb(log->l_mp, 0); XFS_BUF_UNDONE(bp); ASSERT(!(XFS_BUF_ISWRITE(bp))); XFS_BUF_READ(bp); XFS_BUF_UNASYNC(bp); + bp->b_ops = &xfs_sb_buf_ops; xfsbdstrat(log->l_mp, bp); error = xfs_buf_iowait(bp); if (error) { @@ -3707,7 +3705,7 @@ xlog_do_recover( /* Convert superblock from on-disk format */ sbp = &log->l_mp->m_sb; - xfs_sb_from_disk(log->l_mp, XFS_BUF_TO_SBP(bp)); + xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp)); ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC); ASSERT(xfs_sb_good_version(sbp)); xfs_buf_relse(bp); diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index b2bd3a0e637..da508463ff1 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -42,6 +42,7 @@ #include "xfs_fsops.h" #include "xfs_utils.h" #include "xfs_trace.h" +#include "xfs_icache.h" #ifdef HAVE_PERCPU_SB @@ -303,9 +304,8 @@ STATIC int xfs_mount_validate_sb( xfs_mount_t *mp, xfs_sb_t *sbp, - int flags) + bool check_inprogress) { - int loud = !(flags & XFS_MFSI_QUIET); /* * If the log device and data device have the @@ -315,21 +315,18 @@ xfs_mount_validate_sb( * a volume filesystem in a non-volume manner. */ if (sbp->sb_magicnum != XFS_SB_MAGIC) { - if (loud) - xfs_warn(mp, "bad magic number"); + xfs_warn(mp, "bad magic number"); return XFS_ERROR(EWRONGFS); } if (!xfs_sb_good_version(sbp)) { - if (loud) - xfs_warn(mp, "bad version"); + xfs_warn(mp, "bad version"); return XFS_ERROR(EWRONGFS); } if (unlikely( sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) { - if (loud) - xfs_warn(mp, + xfs_warn(mp, "filesystem is marked as having an external log; " "specify logdev on the mount command line."); return XFS_ERROR(EINVAL); @@ -337,8 +334,7 @@ xfs_mount_validate_sb( if (unlikely( sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) { - if (loud) - xfs_warn(mp, + xfs_warn(mp, "filesystem is marked as having an internal log; " "do not specify logdev on the mount command line."); return XFS_ERROR(EINVAL); @@ -372,8 +368,7 @@ xfs_mount_validate_sb( sbp->sb_dblocks == 0 || sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) || sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp))) { - if (loud) - XFS_CORRUPTION_ERROR("SB sanity check failed", + XFS_CORRUPTION_ERROR("SB sanity check failed", XFS_ERRLEVEL_LOW, mp, sbp); return XFS_ERROR(EFSCORRUPTED); } @@ -382,12 +377,10 @@ xfs_mount_validate_sb( * Until this is fixed only page-sized or smaller data blocks work. */ if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) { - if (loud) { - xfs_warn(mp, + xfs_warn(mp, "File system with blocksize %d bytes. " "Only pagesize (%ld) or less will currently work.", sbp->sb_blocksize, PAGE_SIZE); - } return XFS_ERROR(ENOSYS); } @@ -401,23 +394,20 @@ xfs_mount_validate_sb( case 2048: break; default: - if (loud) - xfs_warn(mp, "inode size of %d bytes not supported", + xfs_warn(mp, "inode size of %d bytes not supported", sbp->sb_inodesize); return XFS_ERROR(ENOSYS); } if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) || xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) { - if (loud) - xfs_warn(mp, + xfs_warn(mp, "file system too large to be mounted on this system."); return XFS_ERROR(EFBIG); } - if (unlikely(sbp->sb_inprogress)) { - if (loud) - xfs_warn(mp, "file system busy"); + if (check_inprogress && sbp->sb_inprogress) { + xfs_warn(mp, "Offline file system operation in progress!"); return XFS_ERROR(EFSCORRUPTED); } @@ -425,9 +415,7 @@ xfs_mount_validate_sb( * Version 1 directory format has never worked on Linux. */ if (unlikely(!xfs_sb_version_hasdirv2(sbp))) { - if (loud) - xfs_warn(mp, - "file system using version 1 directory format"); + xfs_warn(mp, "file system using version 1 directory format"); return XFS_ERROR(ENOSYS); } @@ -520,11 +508,9 @@ out_unwind: void xfs_sb_from_disk( - struct xfs_mount *mp, + struct xfs_sb *to, xfs_dsb_t *from) { - struct xfs_sb *to = &mp->m_sb; - to->sb_magicnum = be32_to_cpu(from->sb_magicnum); to->sb_blocksize = be32_to_cpu(from->sb_blocksize); to->sb_dblocks = be64_to_cpu(from->sb_dblocks); @@ -626,6 +612,72 @@ xfs_sb_to_disk( } } +static void +xfs_sb_verify( + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_sb sb; + int error; + + xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp)); + + /* + * Only check the in progress field for the primary superblock as + * mkfs.xfs doesn't clear it from secondary superblocks. + */ + error = xfs_mount_validate_sb(mp, &sb, bp->b_bn == XFS_SB_DADDR); + if (error) + xfs_buf_ioerror(bp, error); +} + +static void +xfs_sb_read_verify( + struct xfs_buf *bp) +{ + xfs_sb_verify(bp); +} + +/* + * We may be probed for a filesystem match, so we may not want to emit + * messages when the superblock buffer is not actually an XFS superblock. + * If we find an XFS superblock, the run a normal, noisy mount because we are + * really going to mount it and want to know about errors. + */ +static void +xfs_sb_quiet_read_verify( + struct xfs_buf *bp) +{ + struct xfs_sb sb; + + xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp)); + + if (sb.sb_magicnum == XFS_SB_MAGIC) { + /* XFS filesystem, verify noisily! */ + xfs_sb_read_verify(bp); + return; + } + /* quietly fail */ + xfs_buf_ioerror(bp, EFSCORRUPTED); +} + +static void +xfs_sb_write_verify( + struct xfs_buf *bp) +{ + xfs_sb_verify(bp); +} + +const struct xfs_buf_ops xfs_sb_buf_ops = { + .verify_read = xfs_sb_read_verify, + .verify_write = xfs_sb_write_verify, +}; + +static const struct xfs_buf_ops xfs_sb_quiet_buf_ops = { + .verify_read = xfs_sb_quiet_read_verify, + .verify_write = xfs_sb_write_verify, +}; + /* * xfs_readsb * @@ -651,26 +703,27 @@ xfs_readsb(xfs_mount_t *mp, int flags) reread: bp = xfs_buf_read_uncached(mp->m_ddev_targp, XFS_SB_DADDR, - BTOBB(sector_size), 0); + BTOBB(sector_size), 0, + loud ? &xfs_sb_buf_ops + : &xfs_sb_quiet_buf_ops); if (!bp) { if (loud) xfs_warn(mp, "SB buffer read failed"); return EIO; } - - /* - * Initialize the mount structure from the superblock. - * But first do some basic consistency checking. - */ - xfs_sb_from_disk(mp, XFS_BUF_TO_SBP(bp)); - error = xfs_mount_validate_sb(mp, &(mp->m_sb), flags); - if (error) { + if (bp->b_error) { + error = bp->b_error; if (loud) xfs_warn(mp, "SB validate failed"); goto release_buf; } /* + * Initialize the mount structure from the superblock. + */ + xfs_sb_from_disk(&mp->m_sb, XFS_BUF_TO_SBP(bp)); + + /* * We must be able to do sector-sized and sector-aligned IO. */ if (sector_size > mp->m_sb.sb_sectsize) { @@ -1001,7 +1054,7 @@ xfs_check_sizes(xfs_mount_t *mp) } bp = xfs_buf_read_uncached(mp->m_ddev_targp, d - XFS_FSS_TO_BB(mp, 1), - XFS_FSS_TO_BB(mp, 1), 0); + XFS_FSS_TO_BB(mp, 1), 0, NULL); if (!bp) { xfs_warn(mp, "last sector read failed"); return EIO; @@ -1016,7 +1069,7 @@ xfs_check_sizes(xfs_mount_t *mp) } bp = xfs_buf_read_uncached(mp->m_logdev_targp, d - XFS_FSB_TO_BB(mp, 1), - XFS_FSB_TO_BB(mp, 1), 0); + XFS_FSB_TO_BB(mp, 1), 0, NULL); if (!bp) { xfs_warn(mp, "log device read failed"); return EIO; @@ -1427,6 +1480,8 @@ xfs_unmountfs( __uint64_t resblks; int error; + cancel_delayed_work_sync(&mp->m_eofblocks_work); + xfs_qm_unmount_quotas(mp); xfs_rtunmount_inodes(mp); IRELE(mp->m_rootip); @@ -1450,21 +1505,16 @@ xfs_unmountfs( /* * And reclaim all inodes. At this point there should be no dirty - * inode, and none should be pinned or locked, but use synchronous - * reclaim just to be sure. + * inodes and none should be pinned or locked, but use synchronous + * reclaim just to be sure. We can stop background inode reclaim + * here as well if it is still running. */ + cancel_delayed_work_sync(&mp->m_reclaim_work); xfs_reclaim_inodes(mp, SYNC_WAIT); xfs_qm_unmount(mp); /* - * Flush out the log synchronously so that we know for sure - * that nothing is pinned. This is important because bflush() - * will skip pinned buffers. - */ - xfs_log_force(mp, XFS_LOG_SYNC); - - /* * Unreserve any blocks we have so that when we unmount we don't account * the reserved free space as used. This is really only necessary for * lazy superblock counting because it trusts the incore superblock @@ -1489,23 +1539,6 @@ xfs_unmountfs( xfs_warn(mp, "Unable to update superblock counters. " "Freespace may not be correct on next mount."); - /* - * At this point we might have modified the superblock again and thus - * added an item to the AIL, thus flush it again. - */ - xfs_ail_push_all_sync(mp->m_ail); - xfs_wait_buftarg(mp->m_ddev_targp); - - /* - * The superblock buffer is uncached and xfsaild_push() will lock and - * set the XBF_ASYNC flag on the buffer. We cannot do xfs_buf_iowait() - * here but a lock on the superblock buffer will block until iodone() - * has completed. - */ - xfs_buf_lock(mp->m_sb_bp); - xfs_buf_unlock(mp->m_sb_bp); - - xfs_log_unmount_write(mp); xfs_log_unmount(mp); xfs_uuid_unmount(mp); diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index deee09e534d..bab8314507e 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -51,8 +51,6 @@ typedef struct xfs_trans_reservations { #else /* __KERNEL__ */ -#include "xfs_sync.h" - struct xlog; struct xfs_inode; struct xfs_mru_cache; @@ -197,9 +195,9 @@ typedef struct xfs_mount { struct mutex m_icsb_mutex; /* balancer sync lock */ #endif struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ - struct delayed_work m_sync_work; /* background sync work */ struct delayed_work m_reclaim_work; /* background inode reclaim */ - struct work_struct m_flush_work; /* background inode flush */ + struct delayed_work m_eofblocks_work; /* background eof blocks + trimming */ __int64_t m_update_flags; /* sb flags we need to update on the next remount,rw */ struct shrinker m_inode_shrink; /* inode reclaim shrinker */ @@ -209,6 +207,9 @@ typedef struct xfs_mount { struct workqueue_struct *m_data_workqueue; struct workqueue_struct *m_unwritten_workqueue; struct workqueue_struct *m_cil_workqueue; + struct workqueue_struct *m_reclaim_workqueue; + struct workqueue_struct *m_log_workqueue; + struct workqueue_struct *m_eofblocks_workqueue; } xfs_mount_t; /* @@ -387,7 +388,9 @@ extern void xfs_set_low_space_thresholds(struct xfs_mount *); extern void xfs_mod_sb(struct xfs_trans *, __int64_t); extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t, xfs_agnumber_t *); -extern void xfs_sb_from_disk(struct xfs_mount *, struct xfs_dsb *); +extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); +extern const struct xfs_buf_ops xfs_sb_buf_ops; + #endif /* __XFS_MOUNT_H__ */ diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c index 2e86fa0cfc0..60eff476315 100644 --- a/fs/xfs/xfs_qm.c +++ b/fs/xfs/xfs_qm.c @@ -40,6 +40,7 @@ #include "xfs_utils.h" #include "xfs_qm.h" #include "xfs_trace.h" +#include "xfs_icache.h" /* * The global quota manager. There is only one of these for the entire @@ -891,7 +892,8 @@ xfs_qm_dqiter_bufs( while (blkcnt--) { error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, XFS_FSB_TO_DADDR(mp, bno), - mp->m_quotainfo->qi_dqchunklen, 0, &bp); + mp->m_quotainfo->qi_dqchunklen, 0, &bp, + &xfs_dquot_buf_ops); if (error) break; @@ -978,7 +980,8 @@ xfs_qm_dqiterate( while (rablkcnt--) { xfs_buf_readahead(mp->m_ddev_targp, XFS_FSB_TO_DADDR(mp, rablkno), - mp->m_quotainfo->qi_dqchunklen); + mp->m_quotainfo->qi_dqchunklen, + NULL); rablkno++; } } @@ -1453,7 +1456,7 @@ xfs_qm_dqreclaim_one( int error; if (!xfs_dqlock_nowait(dqp)) - goto out_busy; + goto out_move_tail; /* * This dquot has acquired a reference in the meantime remove it from @@ -1476,7 +1479,7 @@ xfs_qm_dqreclaim_one( * getting flushed to disk, we don't want to reclaim it. */ if (!xfs_dqflock_nowait(dqp)) - goto out_busy; + goto out_unlock_move_tail; if (XFS_DQ_IS_DIRTY(dqp)) { struct xfs_buf *bp = NULL; @@ -1487,7 +1490,7 @@ xfs_qm_dqreclaim_one( if (error) { xfs_warn(mp, "%s: dquot %p flush failed", __func__, dqp); - goto out_busy; + goto out_unlock_move_tail; } xfs_buf_delwri_queue(bp, buffer_list); @@ -1496,7 +1499,7 @@ xfs_qm_dqreclaim_one( * Give the dquot another try on the freelist, as the * flushing will take some time. */ - goto out_busy; + goto out_unlock_move_tail; } xfs_dqfunlock(dqp); @@ -1515,14 +1518,13 @@ xfs_qm_dqreclaim_one( XFS_STATS_INC(xs_qm_dqreclaims); return; -out_busy: - xfs_dqunlock(dqp); - /* * Move the dquot to the tail of the list so that we don't spin on it. */ +out_unlock_move_tail: + xfs_dqunlock(dqp); +out_move_tail: list_move_tail(&dqp->q_lru, &qi->qi_lru_list); - trace_xfs_dqreclaim_busy(dqp); XFS_STATS_INC(xs_qm_dqreclaim_misses); } diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c index 858a3b18611..8a59f854655 100644 --- a/fs/xfs/xfs_qm_syscalls.c +++ b/fs/xfs/xfs_qm_syscalls.c @@ -40,6 +40,7 @@ #include "xfs_utils.h" #include "xfs_qm.h" #include "xfs_trace.h" +#include "xfs_icache.h" STATIC int xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint); STATIC int xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *, @@ -783,11 +784,11 @@ xfs_qm_scall_getquota( (XFS_IS_OQUOTA_ENFORCED(mp) && (dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) && dst->d_id != 0) { - if (((int) dst->d_bcount > (int) dst->d_blk_softlimit) && + if ((dst->d_bcount > dst->d_blk_softlimit) && (dst->d_blk_softlimit > 0)) { ASSERT(dst->d_btimer != 0); } - if (((int) dst->d_icount > (int) dst->d_ino_softlimit) && + if ((dst->d_icount > dst->d_ino_softlimit) && (dst->d_ino_softlimit > 0)) { ASSERT(dst->d_itimer != 0); } @@ -845,7 +846,8 @@ STATIC int xfs_dqrele_inode( struct xfs_inode *ip, struct xfs_perag *pag, - int flags) + int flags, + void *args) { /* skip quota inodes */ if (ip == ip->i_mount->m_quotainfo->qi_uquotaip || @@ -881,5 +883,5 @@ xfs_qm_dqrele_all_inodes( uint flags) { ASSERT(mp->m_quotainfo); - xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags); + xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags, NULL); } diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index ca28a4ba4b5..98dc670d3ee 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -38,6 +38,7 @@ #include "xfs_utils.h" #include "xfs_trace.h" #include "xfs_buf.h" +#include "xfs_icache.h" /* @@ -869,7 +870,7 @@ xfs_rtbuf_get( ASSERT(map.br_startblock != NULLFSBLOCK); error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, XFS_FSB_TO_DADDR(mp, map.br_startblock), - mp->m_bsize, 0, &bp); + mp->m_bsize, 0, &bp, NULL); if (error) return error; ASSERT(!xfs_buf_geterror(bp)); @@ -1872,9 +1873,14 @@ xfs_growfs_rt( */ bp = xfs_buf_read_uncached(mp->m_rtdev_targp, XFS_FSB_TO_BB(mp, nrblocks - 1), - XFS_FSB_TO_BB(mp, 1), 0); + XFS_FSB_TO_BB(mp, 1), 0, NULL); if (!bp) return EIO; + if (bp->b_error) { + error = bp->b_error; + xfs_buf_relse(bp); + return error; + } xfs_buf_relse(bp); /* @@ -2219,9 +2225,11 @@ xfs_rtmount_init( } bp = xfs_buf_read_uncached(mp->m_rtdev_targp, d - XFS_FSB_TO_BB(mp, 1), - XFS_FSB_TO_BB(mp, 1), 0); - if (!bp) { + XFS_FSB_TO_BB(mp, 1), 0, NULL); + if (!bp || bp->b_error) { xfs_warn(mp, "realtime device size check failed"); + if (bp) + xfs_buf_relse(bp); return EIO; } xfs_buf_relse(bp); diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/xfs_sb.h index f429d9d5d32..a05b45175fb 100644 --- a/fs/xfs/xfs_sb.h +++ b/fs/xfs/xfs_sb.h @@ -81,6 +81,7 @@ struct xfs_mount; #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ +#define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */ #define XFS_SB_VERSION2_OKREALFBITS \ (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ @@ -503,6 +504,12 @@ static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp) (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT); } +static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp) +{ + return (xfs_sb_version_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_CRCBIT)); +} + /* * end of superblock version macros */ diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 26a09bd7f97..ab8839b2627 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -49,7 +49,7 @@ #include "xfs_extfree_item.h" #include "xfs_mru_cache.h" #include "xfs_inode_item.h" -#include "xfs_sync.h" +#include "xfs_icache.h" #include "xfs_trace.h" #include <linux/namei.h> @@ -863,8 +863,30 @@ xfs_init_mount_workqueues( WQ_MEM_RECLAIM, 0, mp->m_fsname); if (!mp->m_cil_workqueue) goto out_destroy_unwritten; + + mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", + WQ_NON_REENTRANT, 0, mp->m_fsname); + if (!mp->m_reclaim_workqueue) + goto out_destroy_cil; + + mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", + WQ_NON_REENTRANT, 0, mp->m_fsname); + if (!mp->m_log_workqueue) + goto out_destroy_reclaim; + + mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", + WQ_NON_REENTRANT, 0, mp->m_fsname); + if (!mp->m_eofblocks_workqueue) + goto out_destroy_log; + return 0; +out_destroy_log: + destroy_workqueue(mp->m_log_workqueue); +out_destroy_reclaim: + destroy_workqueue(mp->m_reclaim_workqueue); +out_destroy_cil: + destroy_workqueue(mp->m_cil_workqueue); out_destroy_unwritten: destroy_workqueue(mp->m_unwritten_workqueue); out_destroy_data_iodone_queue: @@ -877,11 +899,32 @@ STATIC void xfs_destroy_mount_workqueues( struct xfs_mount *mp) { + destroy_workqueue(mp->m_eofblocks_workqueue); + destroy_workqueue(mp->m_log_workqueue); + destroy_workqueue(mp->m_reclaim_workqueue); destroy_workqueue(mp->m_cil_workqueue); destroy_workqueue(mp->m_data_workqueue); destroy_workqueue(mp->m_unwritten_workqueue); } +/* + * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK + * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting + * for IO to complete so that we effectively throttle multiple callers to the + * rate at which IO is completing. + */ +void +xfs_flush_inodes( + struct xfs_mount *mp) +{ + struct super_block *sb = mp->m_super; + + if (down_read_trylock(&sb->s_umount)) { + sync_inodes_sb(sb); + up_read(&sb->s_umount); + } +} + /* Catch misguided souls that try to use this interface on XFS */ STATIC struct inode * xfs_fs_alloc_inode( @@ -1006,9 +1049,8 @@ xfs_fs_put_super( struct xfs_mount *mp = XFS_M(sb); xfs_filestream_unmount(mp); - cancel_delayed_work_sync(&mp->m_sync_work); xfs_unmountfs(mp); - xfs_syncd_stop(mp); + xfs_freesb(mp); xfs_icsb_destroy_counters(mp); xfs_destroy_mount_workqueues(mp); @@ -1023,7 +1065,6 @@ xfs_fs_sync_fs( int wait) { struct xfs_mount *mp = XFS_M(sb); - int error; /* * Doing anything during the async pass would be counterproductive. @@ -1031,17 +1072,14 @@ xfs_fs_sync_fs( if (!wait) return 0; - error = xfs_quiesce_data(mp); - if (error) - return -error; - + xfs_log_force(mp, XFS_LOG_SYNC); if (laptop_mode) { /* * The disk must be active because we're syncing. - * We schedule xfssyncd now (now that the disk is + * We schedule log work now (now that the disk is * active) instead of later (when it might not be). */ - flush_delayed_work(&mp->m_sync_work); + flush_delayed_work(&mp->m_log->l_work); } return 0; @@ -1118,6 +1156,48 @@ xfs_restore_resvblks(struct xfs_mount *mp) xfs_reserve_blocks(mp, &resblks, NULL); } +/* + * Trigger writeback of all the dirty metadata in the file system. + * + * This ensures that the metadata is written to their location on disk rather + * than just existing in transactions in the log. This means after a quiesce + * there is no log replay required to write the inodes to disk - this is the + * primary difference between a sync and a quiesce. + * + * Note: xfs_log_quiesce() stops background log work - the callers must ensure + * it is started again when appropriate. + */ +void +xfs_quiesce_attr( + struct xfs_mount *mp) +{ + int error = 0; + + /* wait for all modifications to complete */ + while (atomic_read(&mp->m_active_trans) > 0) + delay(100); + + /* force the log to unpin objects from the now complete transactions */ + xfs_log_force(mp, XFS_LOG_SYNC); + + /* reclaim inodes to do any IO before the freeze completes */ + xfs_reclaim_inodes(mp, 0); + xfs_reclaim_inodes(mp, SYNC_WAIT); + + /* Push the superblock and write an unmount record */ + error = xfs_log_sbcount(mp); + if (error) + xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " + "Frozen image may not be consistent."); + /* + * Just warn here till VFS can correctly support + * read-only remount without racing. + */ + WARN_ON(atomic_read(&mp->m_active_trans) != 0); + + xfs_log_quiesce(mp); +} + STATIC int xfs_fs_remount( struct super_block *sb, @@ -1198,20 +1278,18 @@ xfs_fs_remount( * value if it is non-zero, otherwise go with the default. */ xfs_restore_resvblks(mp); + xfs_log_work_queue(mp); } /* rw -> ro */ if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { /* - * After we have synced the data but before we sync the - * metadata, we need to free up the reserve block pool so that - * the used block count in the superblock on disk is correct at - * the end of the remount. Stash the current reserve pool size - * so that if we get remounted rw, we can return it to the same - * size. + * Before we sync the metadata, we need to free up the reserve + * block pool so that the used block count in the superblock on + * disk is correct at the end of the remount. Stash the current + * reserve pool size so that if we get remounted rw, we can + * return it to the same size. */ - - xfs_quiesce_data(mp); xfs_save_resvblks(mp); xfs_quiesce_attr(mp); mp->m_flags |= XFS_MOUNT_RDONLY; @@ -1243,6 +1321,7 @@ xfs_fs_unfreeze( struct xfs_mount *mp = XFS_M(sb); xfs_restore_resvblks(mp); + xfs_log_work_queue(mp); return 0; } @@ -1321,6 +1400,8 @@ xfs_fs_fill_super( spin_lock_init(&mp->m_sb_lock); mutex_init(&mp->m_growlock); atomic_set(&mp->m_active_trans, 0); + INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); + INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); mp->m_super = sb; sb->s_fs_info = mp; @@ -1371,10 +1452,6 @@ xfs_fs_fill_super( /* * we must configure the block size in the superblock before we run the * full mount process as the mount process can lookup and cache inodes. - * For the same reason we must also initialise the syncd and register - * the inode cache shrinker so that inodes can be reclaimed during - * operations like a quotacheck that iterate all inodes in the - * filesystem. */ sb->s_magic = XFS_SB_MAGIC; sb->s_blocksize = mp->m_sb.sb_blocksize; @@ -1384,13 +1461,9 @@ xfs_fs_fill_super( sb->s_time_gran = 1; set_posix_acl_flag(sb); - error = xfs_syncd_init(mp); - if (error) - goto out_filestream_unmount; - error = xfs_mountfs(mp); if (error) - goto out_syncd_stop; + goto out_filestream_unmount; root = igrab(VFS_I(mp->m_rootip)); if (!root) { @@ -1408,8 +1481,7 @@ xfs_fs_fill_super( } return 0; - out_syncd_stop: - xfs_syncd_stop(mp); + out_filestream_unmount: xfs_filestream_unmount(mp); out_free_sb: @@ -1429,7 +1501,6 @@ out_destroy_workqueues: out_unmount: xfs_filestream_unmount(mp); xfs_unmountfs(mp); - xfs_syncd_stop(mp); goto out_free_sb; } @@ -1625,16 +1696,6 @@ STATIC int __init xfs_init_workqueues(void) { /* - * We never want to the same work item to run twice, reclaiming inodes - * or idling the log is not going to get any faster by multiple CPUs - * competing for ressources. Use the default large max_active value - * so that even lots of filesystems can perform these task in parallel. - */ - xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_NON_REENTRANT, 0); - if (!xfs_syncd_wq) - return -ENOMEM; - - /* * The allocation workqueue can be used in memory reclaim situations * (writepage path), and parallelism is only limited by the number of * AGs in all the filesystems mounted. Hence use the default large @@ -1642,20 +1703,15 @@ xfs_init_workqueues(void) */ xfs_alloc_wq = alloc_workqueue("xfsalloc", WQ_MEM_RECLAIM, 0); if (!xfs_alloc_wq) - goto out_destroy_syncd; + return -ENOMEM; return 0; - -out_destroy_syncd: - destroy_workqueue(xfs_syncd_wq); - return -ENOMEM; } STATIC void xfs_destroy_workqueues(void) { destroy_workqueue(xfs_alloc_wq); - destroy_workqueue(xfs_syncd_wq); } STATIC int __init diff --git a/fs/xfs/xfs_super.h b/fs/xfs/xfs_super.h index 9de4a920ba0..bbe3d15a790 100644 --- a/fs/xfs/xfs_super.h +++ b/fs/xfs/xfs_super.h @@ -74,6 +74,7 @@ struct block_device; extern __uint64_t xfs_max_file_offset(unsigned int); +extern void xfs_flush_inodes(struct xfs_mount *mp); extern void xfs_blkdev_issue_flush(struct xfs_buftarg *); extern xfs_agnumber_t xfs_set_inode32(struct xfs_mount *); extern xfs_agnumber_t xfs_set_inode64(struct xfs_mount *); diff --git a/fs/xfs/xfs_sysctl.c b/fs/xfs/xfs_sysctl.c index ee2d2adaa43..2801b5ce6cd 100644 --- a/fs/xfs/xfs_sysctl.c +++ b/fs/xfs/xfs_sysctl.c @@ -202,6 +202,15 @@ static ctl_table xfs_table[] = { .extra1 = &xfs_params.fstrm_timer.min, .extra2 = &xfs_params.fstrm_timer.max, }, + { + .procname = "speculative_prealloc_lifetime", + .data = &xfs_params.eofb_timer.val, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = &xfs_params.eofb_timer.min, + .extra2 = &xfs_params.eofb_timer.max, + }, /* please keep this the last entry */ #ifdef CONFIG_PROC_FS { diff --git a/fs/xfs/xfs_sysctl.h b/fs/xfs/xfs_sysctl.h index b9937d450f8..bd8e157c20e 100644 --- a/fs/xfs/xfs_sysctl.h +++ b/fs/xfs/xfs_sysctl.h @@ -47,6 +47,7 @@ typedef struct xfs_param { xfs_sysctl_val_t rotorstep; /* inode32 AG rotoring control knob */ xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */ xfs_sysctl_val_t fstrm_timer; /* Filestream dir-AG assoc'n timeout. */ + xfs_sysctl_val_t eofb_timer; /* Interval between eofb scan wakeups */ } xfs_param_t; /* diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 7d36ccf57f9..2e137d4a85a 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -96,6 +96,8 @@ DEFINE_ATTR_LIST_EVENT(xfs_attr_list_full); DEFINE_ATTR_LIST_EVENT(xfs_attr_list_add); DEFINE_ATTR_LIST_EVENT(xfs_attr_list_wrong_blk); DEFINE_ATTR_LIST_EVENT(xfs_attr_list_notfound); +DEFINE_ATTR_LIST_EVENT(xfs_attr_leaf_list); +DEFINE_ATTR_LIST_EVENT(xfs_attr_node_list); DECLARE_EVENT_CLASS(xfs_perag_class, TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, int refcount, @@ -130,6 +132,8 @@ DEFINE_PERAG_REF_EVENT(xfs_perag_get_tag); DEFINE_PERAG_REF_EVENT(xfs_perag_put); DEFINE_PERAG_REF_EVENT(xfs_perag_set_reclaim); DEFINE_PERAG_REF_EVENT(xfs_perag_clear_reclaim); +DEFINE_PERAG_REF_EVENT(xfs_perag_set_eofblocks); +DEFINE_PERAG_REF_EVENT(xfs_perag_clear_eofblocks); TRACE_EVENT(xfs_attr_list_node_descend, TP_PROTO(struct xfs_attr_list_context *ctx, @@ -585,6 +589,10 @@ DEFINE_INODE_EVENT(xfs_update_time); DEFINE_INODE_EVENT(xfs_dquot_dqalloc); DEFINE_INODE_EVENT(xfs_dquot_dqdetach); +DEFINE_INODE_EVENT(xfs_inode_set_eofblocks_tag); +DEFINE_INODE_EVENT(xfs_inode_clear_eofblocks_tag); +DEFINE_INODE_EVENT(xfs_inode_free_eofblocks_invalid); + DECLARE_EVENT_CLASS(xfs_iref_class, TP_PROTO(struct xfs_inode *ip, unsigned long caller_ip), TP_ARGS(ip, caller_ip), @@ -1496,8 +1504,42 @@ DEFINE_DIR2_EVENT(xfs_dir2_node_replace); DEFINE_DIR2_EVENT(xfs_dir2_node_removename); DEFINE_DIR2_EVENT(xfs_dir2_node_to_leaf); +DECLARE_EVENT_CLASS(xfs_attr_class, + TP_PROTO(struct xfs_da_args *args), + TP_ARGS(args), + TP_STRUCT__entry( + __field(dev_t, dev) + __field(xfs_ino_t, ino) + __dynamic_array(char, name, args->namelen) + __field(int, namelen) + __field(int, valuelen) + __field(xfs_dahash_t, hashval) + __field(int, op_flags) + ), + TP_fast_assign( + __entry->dev = VFS_I(args->dp)->i_sb->s_dev; + __entry->ino = args->dp->i_ino; + if (args->namelen) + memcpy(__get_str(name), args->name, args->namelen); + __entry->namelen = args->namelen; + __entry->valuelen = args->valuelen; + __entry->hashval = args->hashval; + __entry->op_flags = args->op_flags; + ), + TP_printk("dev %d:%d ino 0x%llx name %.*s namelen %d valuelen %d " + "hashval 0x%x op_flags %s", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->ino, + __entry->namelen, + __entry->namelen ? __get_str(name) : NULL, + __entry->namelen, + __entry->valuelen, + __entry->hashval, + __print_flags(__entry->op_flags, "|", XFS_DA_OP_FLAGS)) +) + #define DEFINE_ATTR_EVENT(name) \ -DEFINE_EVENT(xfs_da_class, name, \ +DEFINE_EVENT(xfs_attr_class, name, \ TP_PROTO(struct xfs_da_args *args), \ TP_ARGS(args)) DEFINE_ATTR_EVENT(xfs_attr_sf_add); @@ -1511,10 +1553,14 @@ DEFINE_ATTR_EVENT(xfs_attr_sf_to_leaf); DEFINE_ATTR_EVENT(xfs_attr_leaf_add); DEFINE_ATTR_EVENT(xfs_attr_leaf_add_old); DEFINE_ATTR_EVENT(xfs_attr_leaf_add_new); +DEFINE_ATTR_EVENT(xfs_attr_leaf_add_work); DEFINE_ATTR_EVENT(xfs_attr_leaf_addname); DEFINE_ATTR_EVENT(xfs_attr_leaf_create); +DEFINE_ATTR_EVENT(xfs_attr_leaf_compact); +DEFINE_ATTR_EVENT(xfs_attr_leaf_get); DEFINE_ATTR_EVENT(xfs_attr_leaf_lookup); DEFINE_ATTR_EVENT(xfs_attr_leaf_replace); +DEFINE_ATTR_EVENT(xfs_attr_leaf_remove); DEFINE_ATTR_EVENT(xfs_attr_leaf_removename); DEFINE_ATTR_EVENT(xfs_attr_leaf_split); DEFINE_ATTR_EVENT(xfs_attr_leaf_split_before); @@ -1526,12 +1572,21 @@ DEFINE_ATTR_EVENT(xfs_attr_leaf_to_sf); DEFINE_ATTR_EVENT(xfs_attr_leaf_to_node); DEFINE_ATTR_EVENT(xfs_attr_leaf_rebalance); DEFINE_ATTR_EVENT(xfs_attr_leaf_unbalance); +DEFINE_ATTR_EVENT(xfs_attr_leaf_toosmall); DEFINE_ATTR_EVENT(xfs_attr_node_addname); +DEFINE_ATTR_EVENT(xfs_attr_node_get); DEFINE_ATTR_EVENT(xfs_attr_node_lookup); DEFINE_ATTR_EVENT(xfs_attr_node_replace); DEFINE_ATTR_EVENT(xfs_attr_node_removename); +DEFINE_ATTR_EVENT(xfs_attr_fillstate); +DEFINE_ATTR_EVENT(xfs_attr_refillstate); + +DEFINE_ATTR_EVENT(xfs_attr_rmtval_get); +DEFINE_ATTR_EVENT(xfs_attr_rmtval_set); +DEFINE_ATTR_EVENT(xfs_attr_rmtval_remove); + #define DEFINE_DA_EVENT(name) \ DEFINE_EVENT(xfs_da_class, name, \ TP_PROTO(struct xfs_da_args *args), \ @@ -1550,9 +1605,12 @@ DEFINE_DA_EVENT(xfs_da_node_split); DEFINE_DA_EVENT(xfs_da_node_remove); DEFINE_DA_EVENT(xfs_da_node_rebalance); DEFINE_DA_EVENT(xfs_da_node_unbalance); +DEFINE_DA_EVENT(xfs_da_node_toosmall); DEFINE_DA_EVENT(xfs_da_swap_lastblock); DEFINE_DA_EVENT(xfs_da_grow_inode); DEFINE_DA_EVENT(xfs_da_shrink_inode); +DEFINE_DA_EVENT(xfs_da_fixhashpath); +DEFINE_DA_EVENT(xfs_da_path_shift); DECLARE_EVENT_CLASS(xfs_dir2_space_class, TP_PROTO(struct xfs_da_args *args, int idx), diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h index db056544cbb..c6c0601abd7 100644 --- a/fs/xfs/xfs_trans.h +++ b/fs/xfs/xfs_trans.h @@ -464,10 +464,7 @@ xfs_trans_get_buf( int numblks, uint flags) { - struct xfs_buf_map map = { - .bm_bn = blkno, - .bm_len = numblks, - }; + DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); return xfs_trans_get_buf_map(tp, target, &map, 1, flags); } @@ -476,7 +473,8 @@ int xfs_trans_read_buf_map(struct xfs_mount *mp, struct xfs_buftarg *target, struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, - struct xfs_buf **bpp); + struct xfs_buf **bpp, + const struct xfs_buf_ops *ops); static inline int xfs_trans_read_buf( @@ -486,13 +484,12 @@ xfs_trans_read_buf( xfs_daddr_t blkno, int numblks, xfs_buf_flags_t flags, - struct xfs_buf **bpp) + struct xfs_buf **bpp, + const struct xfs_buf_ops *ops) { - struct xfs_buf_map map = { - .bm_bn = blkno, - .bm_len = numblks, - }; - return xfs_trans_read_buf_map(mp, tp, target, &map, 1, flags, bpp); + DEFINE_SINGLE_BUF_MAP(map, blkno, numblks); + return xfs_trans_read_buf_map(mp, tp, target, &map, 1, + flags, bpp, ops); } struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int); diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c index 6311b99c267..3edf5dbee00 100644 --- a/fs/xfs/xfs_trans_buf.c +++ b/fs/xfs/xfs_trans_buf.c @@ -93,7 +93,7 @@ _xfs_trans_bjoin( xfs_buf_item_init(bp, tp->t_mountp); bip = bp->b_fspriv; ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); - ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_CANCEL)); + ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL)); ASSERT(!(bip->bli_flags & XFS_BLI_LOGGED)); if (reset_recur) bip->bli_recur = 0; @@ -257,7 +257,8 @@ xfs_trans_read_buf_map( struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags, - struct xfs_buf **bpp) + struct xfs_buf **bpp, + const struct xfs_buf_ops *ops) { xfs_buf_t *bp; xfs_buf_log_item_t *bip; @@ -265,7 +266,7 @@ xfs_trans_read_buf_map( *bpp = NULL; if (!tp) { - bp = xfs_buf_read_map(target, map, nmaps, flags); + bp = xfs_buf_read_map(target, map, nmaps, flags, ops); if (!bp) return (flags & XBF_TRYLOCK) ? EAGAIN : XFS_ERROR(ENOMEM); @@ -312,7 +313,9 @@ xfs_trans_read_buf_map( if (!(XFS_BUF_ISDONE(bp))) { trace_xfs_trans_read_buf_io(bp, _RET_IP_); ASSERT(!XFS_BUF_ISASYNC(bp)); + ASSERT(bp->b_iodone == NULL); XFS_BUF_READ(bp); + bp->b_ops = ops; xfsbdstrat(tp->t_mountp, bp); error = xfs_buf_iowait(bp); if (error) { @@ -349,7 +352,7 @@ xfs_trans_read_buf_map( return 0; } - bp = xfs_buf_read_map(target, map, nmaps, flags); + bp = xfs_buf_read_map(target, map, nmaps, flags, ops); if (bp == NULL) { *bpp = NULL; return (flags & XBF_TRYLOCK) ? @@ -429,7 +432,7 @@ xfs_trans_brelse(xfs_trans_t *tp, bip = bp->b_fspriv; ASSERT(bip->bli_item.li_type == XFS_LI_BUF); ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); - ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_CANCEL)); + ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL)); ASSERT(atomic_read(&bip->bli_refcount) > 0); trace_xfs_trans_brelse(bip); @@ -516,7 +519,7 @@ xfs_trans_bhold(xfs_trans_t *tp, ASSERT(bp->b_transp == tp); ASSERT(bip != NULL); ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); - ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_CANCEL)); + ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL)); ASSERT(atomic_read(&bip->bli_refcount) > 0); bip->bli_flags |= XFS_BLI_HOLD; @@ -536,7 +539,7 @@ xfs_trans_bhold_release(xfs_trans_t *tp, ASSERT(bp->b_transp == tp); ASSERT(bip != NULL); ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); - ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_CANCEL)); + ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_CANCEL)); ASSERT(atomic_read(&bip->bli_refcount) > 0); ASSERT(bip->bli_flags & XFS_BLI_HOLD); @@ -595,7 +598,7 @@ xfs_trans_log_buf(xfs_trans_t *tp, bip->bli_flags &= ~XFS_BLI_STALE; ASSERT(XFS_BUF_ISSTALE(bp)); XFS_BUF_UNSTALE(bp); - bip->bli_format.blf_flags &= ~XFS_BLF_CANCEL; + bip->__bli_format.blf_flags &= ~XFS_BLF_CANCEL; } tp->t_flags |= XFS_TRANS_DIRTY; @@ -640,6 +643,7 @@ xfs_trans_binval( xfs_buf_t *bp) { xfs_buf_log_item_t *bip = bp->b_fspriv; + int i; ASSERT(bp->b_transp == tp); ASSERT(bip != NULL); @@ -654,8 +658,8 @@ xfs_trans_binval( */ ASSERT(XFS_BUF_ISSTALE(bp)); ASSERT(!(bip->bli_flags & (XFS_BLI_LOGGED | XFS_BLI_DIRTY))); - ASSERT(!(bip->bli_format.blf_flags & XFS_BLF_INODE_BUF)); - ASSERT(bip->bli_format.blf_flags & XFS_BLF_CANCEL); + ASSERT(!(bip->__bli_format.blf_flags & XFS_BLF_INODE_BUF)); + ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL); ASSERT(bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY); ASSERT(tp->t_flags & XFS_TRANS_DIRTY); return; @@ -665,10 +669,12 @@ xfs_trans_binval( bip->bli_flags |= XFS_BLI_STALE; bip->bli_flags &= ~(XFS_BLI_INODE_BUF | XFS_BLI_LOGGED | XFS_BLI_DIRTY); - bip->bli_format.blf_flags &= ~XFS_BLF_INODE_BUF; - bip->bli_format.blf_flags |= XFS_BLF_CANCEL; - memset((char *)(bip->bli_format.blf_data_map), 0, - (bip->bli_format.blf_map_size * sizeof(uint))); + bip->__bli_format.blf_flags &= ~XFS_BLF_INODE_BUF; + bip->__bli_format.blf_flags |= XFS_BLF_CANCEL; + for (i = 0; i < bip->bli_format_count; i++) { + memset(bip->bli_formats[i].blf_data_map, 0, + (bip->bli_formats[i].blf_map_size * sizeof(uint))); + } bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY; tp->t_flags |= XFS_TRANS_DIRTY; } @@ -772,5 +778,5 @@ xfs_trans_dquot_buf( type == XFS_BLF_GDQUOT_BUF); ASSERT(atomic_read(&bip->bli_refcount) > 0); - bip->bli_format.blf_flags |= type; + bip->__bli_format.blf_flags |= type; } diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 2a5c637344b..d95f565a390 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -47,6 +47,7 @@ #include "xfs_filestream.h" #include "xfs_vnodeops.h" #include "xfs_trace.h" +#include "xfs_icache.h" /* * The maximum pathlen is 1024 bytes. Since the minimum file system @@ -79,7 +80,7 @@ xfs_readlink_bmap( d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); - bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0); + bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, NULL); if (!bp) return XFS_ERROR(ENOMEM); error = bp->b_error; @@ -150,7 +151,7 @@ xfs_readlink( * when the link count isn't zero and by xfs_dm_punch_hole() when * punching a hole to EOF. */ -STATIC int +int xfs_free_eofblocks( xfs_mount_t *mp, xfs_inode_t *ip, @@ -199,7 +200,7 @@ xfs_free_eofblocks( if (need_iolock) { if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) { xfs_trans_cancel(tp, 0); - return 0; + return EAGAIN; } } @@ -237,6 +238,8 @@ xfs_free_eofblocks( } else { error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); + if (!error) + xfs_inode_clear_eofblocks_tag(ip); } xfs_iunlock(ip, XFS_ILOCK_EXCL); @@ -425,19 +428,18 @@ xfs_release( truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED); if (truncated) { xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE); - if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) - xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); + if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) { + error = -filemap_flush(VFS_I(ip)->i_mapping); + if (error) + return error; + } } } if (ip->i_d.di_nlink == 0) return 0; - if ((S_ISREG(ip->i_d.di_mode) && - (VFS_I(ip)->i_size > 0 || - (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) && - (ip->i_df.if_flags & XFS_IFEXTENTS)) && - (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { + if (xfs_can_free_eofblocks(ip, false)) { /* * If we can't get the iolock just skip truncating the blocks @@ -464,7 +466,7 @@ xfs_release( return 0; error = xfs_free_eofblocks(mp, ip, true); - if (error) + if (error && error != EAGAIN) return error; /* delalloc blocks after truncation means it really is dirty */ @@ -513,13 +515,12 @@ xfs_inactive( goto out; if (ip->i_d.di_nlink != 0) { - if ((S_ISREG(ip->i_d.di_mode) && - (VFS_I(ip)->i_size > 0 || - (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) && - (ip->i_df.if_flags & XFS_IFEXTENTS) && - (!(ip->i_d.di_flags & - (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || - ip->i_delayed_blks != 0))) { + /* + * force is true because we are evicting an inode from the + * cache. Post-eof blocks must be freed, lest we end up with + * broken free space accounting. + */ + if (xfs_can_free_eofblocks(ip, true)) { error = xfs_free_eofblocks(mp, ip, false); if (error) return VN_INACTIVE_CACHE; @@ -777,7 +778,7 @@ xfs_create( XFS_TRANS_PERM_LOG_RES, log_count); if (error == ENOSPC) { /* flush outstanding delalloc blocks and retry */ - xfs_flush_inodes(dp); + xfs_flush_inodes(mp); error = xfs_trans_reserve(tp, resblks, log_res, 0, XFS_TRANS_PERM_LOG_RES, log_count); } @@ -1957,12 +1958,11 @@ xfs_free_file_space( rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); ioffset = offset & ~(rounding - 1); - - if (VN_CACHED(VFS_I(ip)) != 0) { - error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED); - if (error) - goto out_unlock_iolock; - } + error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, + ioffset, -1); + if (error) + goto out_unlock_iolock; + truncate_pagecache_range(VFS_I(ip), ioffset, -1); /* * Need to zero the stuff we're not freeing, on disk. @@ -2095,6 +2095,73 @@ xfs_free_file_space( return error; } + +STATIC int +xfs_zero_file_space( + struct xfs_inode *ip, + xfs_off_t offset, + xfs_off_t len, + int attr_flags) +{ + struct xfs_mount *mp = ip->i_mount; + uint granularity; + xfs_off_t start_boundary; + xfs_off_t end_boundary; + int error; + + granularity = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); + + /* + * Round the range of extents we are going to convert inwards. If the + * offset is aligned, then it doesn't get changed so we zero from the + * start of the block offset points to. + */ + start_boundary = round_up(offset, granularity); + end_boundary = round_down(offset + len, granularity); + + ASSERT(start_boundary >= offset); + ASSERT(end_boundary <= offset + len); + + if (!(attr_flags & XFS_ATTR_NOLOCK)) + xfs_ilock(ip, XFS_IOLOCK_EXCL); + + if (start_boundary < end_boundary - 1) { + /* punch out the page cache over the conversion range */ + truncate_pagecache_range(VFS_I(ip), start_boundary, + end_boundary - 1); + /* convert the blocks */ + error = xfs_alloc_file_space(ip, start_boundary, + end_boundary - start_boundary - 1, + XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT, + attr_flags); + if (error) + goto out_unlock; + + /* We've handled the interior of the range, now for the edges */ + if (start_boundary != offset) + error = xfs_iozero(ip, offset, start_boundary - offset); + if (error) + goto out_unlock; + + if (end_boundary != offset + len) + error = xfs_iozero(ip, end_boundary, + offset + len - end_boundary); + + } else { + /* + * It's either a sub-granularity range or the range spanned lies + * partially across two adjacent blocks. + */ + error = xfs_iozero(ip, offset, len); + } + +out_unlock: + if (!(attr_flags & XFS_ATTR_NOLOCK)) + xfs_iunlock(ip, XFS_IOLOCK_EXCL); + return error; + +} + /* * xfs_change_file_space() * This routine allocates or frees disk space for the given file. @@ -2120,10 +2187,8 @@ xfs_change_file_space( xfs_fsize_t fsize; int setprealloc; xfs_off_t startoffset; - xfs_off_t llen; xfs_trans_t *tp; struct iattr iattr; - int prealloc_type; if (!S_ISREG(ip->i_d.di_mode)) return XFS_ERROR(EINVAL); @@ -2141,12 +2206,30 @@ xfs_change_file_space( return XFS_ERROR(EINVAL); } - llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; + /* + * length of <= 0 for resv/unresv/zero is invalid. length for + * alloc/free is ignored completely and we have no idea what userspace + * might have set it to, so set it to zero to allow range + * checks to pass. + */ + switch (cmd) { + case XFS_IOC_ZERO_RANGE: + case XFS_IOC_RESVSP: + case XFS_IOC_RESVSP64: + case XFS_IOC_UNRESVSP: + case XFS_IOC_UNRESVSP64: + if (bf->l_len <= 0) + return XFS_ERROR(EINVAL); + break; + default: + bf->l_len = 0; + break; + } if (bf->l_start < 0 || bf->l_start > mp->m_super->s_maxbytes || - bf->l_start + llen < 0 || - bf->l_start + llen > mp->m_super->s_maxbytes) + bf->l_start + bf->l_len < 0 || + bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) return XFS_ERROR(EINVAL); bf->l_whence = 0; @@ -2154,29 +2237,20 @@ xfs_change_file_space( startoffset = bf->l_start; fsize = XFS_ISIZE(ip); - /* - * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve - * file space. - * These calls do NOT zero the data space allocated to the file, - * nor do they change the file size. - * - * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file - * space. - * These calls cause the new file data to be zeroed and the file - * size to be changed. - */ setprealloc = clrprealloc = 0; - prealloc_type = XFS_BMAPI_PREALLOC; - switch (cmd) { case XFS_IOC_ZERO_RANGE: - prealloc_type |= XFS_BMAPI_CONVERT; - xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0); - /* FALLTHRU */ + error = xfs_zero_file_space(ip, startoffset, bf->l_len, + attr_flags); + if (error) + return error; + setprealloc = 1; + break; + case XFS_IOC_RESVSP: case XFS_IOC_RESVSP64: error = xfs_alloc_file_space(ip, startoffset, bf->l_len, - prealloc_type, attr_flags); + XFS_BMAPI_PREALLOC, attr_flags); if (error) return error; setprealloc = 1; diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h index 447e146b2ba..5163022d980 100644 --- a/fs/xfs/xfs_vnodeops.h +++ b/fs/xfs/xfs_vnodeops.h @@ -48,14 +48,9 @@ int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name, int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags); int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize, int flags, struct attrlist_cursor_kern *cursor); -void xfs_tosspages(struct xfs_inode *inode, xfs_off_t first, - xfs_off_t last, int fiopt); -int xfs_flushinval_pages(struct xfs_inode *ip, xfs_off_t first, - xfs_off_t last, int fiopt); -int xfs_flush_pages(struct xfs_inode *ip, xfs_off_t first, - xfs_off_t last, uint64_t flags, int fiopt); -int xfs_wait_on_pages(struct xfs_inode *ip, xfs_off_t first, xfs_off_t last); +int xfs_iozero(struct xfs_inode *, loff_t, size_t); int xfs_zero_eof(struct xfs_inode *, xfs_off_t, xfs_fsize_t); +int xfs_free_eofblocks(struct xfs_mount *, struct xfs_inode *, bool); #endif /* _XFS_VNODEOPS_H */ |