diff options
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 107 |
1 files changed, 32 insertions, 75 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index e0bc4ffb8e7..7aacf31418f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1428,6 +1428,7 @@ struct super_block { #else struct list_head s_files; #endif + struct list_head s_mounts; /* list of mounts; _not_ for fs use */ /* s_dentry_lru, s_nr_dentry_unused protected by dcache.c lru locks */ struct list_head s_dentry_lru; /* unused dentry lru */ int s_nr_dentry_unused; /* # of dentry on lru */ @@ -1440,7 +1441,7 @@ struct super_block { struct block_device *s_bdev; struct backing_dev_info *s_bdi; struct mtd_info *s_mtd; - struct list_head s_instances; + struct hlist_node s_instances; struct quota_info s_dquot; /* Diskquota specific options */ int s_frozen; @@ -1481,6 +1482,12 @@ struct super_block { int cleancache_poolid; struct shrinker s_shrink; /* per-sb shrinker handle */ + + /* Number of inodes with nlink == 0 but still referenced */ + atomic_long_t s_remove_count; + + /* Being remounted read-only */ + int s_readonly_remount; }; /* superblock cache pruning functions */ @@ -1516,9 +1523,9 @@ extern void unlock_super(struct super_block *); /* * VFS helper functions.. */ -extern int vfs_create(struct inode *, struct dentry *, int, struct nameidata *); -extern int vfs_mkdir(struct inode *, struct dentry *, int); -extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t); +extern int vfs_create(struct inode *, struct dentry *, umode_t, struct nameidata *); +extern int vfs_mkdir(struct inode *, struct dentry *, umode_t); +extern int vfs_mknod(struct inode *, struct dentry *, umode_t, dev_t); extern int vfs_symlink(struct inode *, struct dentry *, const char *); extern int vfs_link(struct dentry *, struct inode *, struct dentry *); extern int vfs_rmdir(struct inode *, struct dentry *); @@ -1534,7 +1541,7 @@ extern void dentry_unhash(struct dentry *dentry); * VFS file helper functions. */ extern void inode_init_owner(struct inode *inode, const struct inode *dir, - mode_t mode); + umode_t mode); /* * VFS FS_IOC_FIEMAP helper definitions. */ @@ -1619,13 +1626,13 @@ struct inode_operations { int (*readlink) (struct dentry *, char __user *,int); void (*put_link) (struct dentry *, struct nameidata *, void *); - int (*create) (struct inode *,struct dentry *,int, struct nameidata *); + int (*create) (struct inode *,struct dentry *,umode_t,struct nameidata *); int (*link) (struct dentry *,struct inode *,struct dentry *); int (*unlink) (struct inode *,struct dentry *); int (*symlink) (struct inode *,struct dentry *,const char *); - int (*mkdir) (struct inode *,struct dentry *,int); + int (*mkdir) (struct inode *,struct dentry *,umode_t); int (*rmdir) (struct inode *,struct dentry *); - int (*mknod) (struct inode *,struct dentry *,int,dev_t); + int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t); int (*rename) (struct inode *, struct dentry *, struct inode *, struct dentry *); void (*truncate) (struct inode *); @@ -1672,10 +1679,10 @@ struct super_operations { int (*remount_fs) (struct super_block *, int *, char *); void (*umount_begin) (struct super_block *); - int (*show_options)(struct seq_file *, struct vfsmount *); - int (*show_devname)(struct seq_file *, struct vfsmount *); - int (*show_path)(struct seq_file *, struct vfsmount *); - int (*show_stats)(struct seq_file *, struct vfsmount *); + int (*show_options)(struct seq_file *, struct dentry *); + int (*show_devname)(struct seq_file *, struct dentry *); + int (*show_path)(struct seq_file *, struct dentry *); + int (*show_stats)(struct seq_file *, struct dentry *); #ifdef CONFIG_QUOTA ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t); ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t); @@ -1764,31 +1771,10 @@ static inline void mark_inode_dirty_sync(struct inode *inode) __mark_inode_dirty(inode, I_DIRTY_SYNC); } -/** - * set_nlink - directly set an inode's link count - * @inode: inode - * @nlink: new nlink (should be non-zero) - * - * This is a low-level filesystem helper to replace any - * direct filesystem manipulation of i_nlink. - */ -static inline void set_nlink(struct inode *inode, unsigned int nlink) -{ - inode->__i_nlink = nlink; -} - -/** - * inc_nlink - directly increment an inode's link count - * @inode: inode - * - * This is a low-level filesystem helper to replace any - * direct filesystem manipulation of i_nlink. Currently, - * it is only here for parity with dec_nlink(). - */ -static inline void inc_nlink(struct inode *inode) -{ - inode->__i_nlink++; -} +extern void inc_nlink(struct inode *inode); +extern void drop_nlink(struct inode *inode); +extern void clear_nlink(struct inode *inode); +extern void set_nlink(struct inode *inode, unsigned int nlink); static inline void inode_inc_link_count(struct inode *inode) { @@ -1796,35 +1782,6 @@ static inline void inode_inc_link_count(struct inode *inode) mark_inode_dirty(inode); } -/** - * drop_nlink - directly drop an inode's link count - * @inode: inode - * - * This is a low-level filesystem helper to replace any - * direct filesystem manipulation of i_nlink. In cases - * where we are attempting to track writes to the - * filesystem, a decrement to zero means an imminent - * write when the file is truncated and actually unlinked - * on the filesystem. - */ -static inline void drop_nlink(struct inode *inode) -{ - inode->__i_nlink--; -} - -/** - * clear_nlink - directly zero an inode's link count - * @inode: inode - * - * This is a low-level filesystem helper to replace any - * direct filesystem manipulation of i_nlink. See - * drop_nlink() for why we care about i_nlink hitting zero. - */ -static inline void clear_nlink(struct inode *inode) -{ - inode->__i_nlink = 0; -} - static inline void inode_dec_link_count(struct inode *inode) { drop_nlink(inode); @@ -1864,7 +1821,7 @@ struct file_system_type { void (*kill_sb) (struct super_block *); struct module *owner; struct file_system_type * next; - struct list_head fs_supers; + struct hlist_head fs_supers; struct lock_class_key s_lock_key; struct lock_class_key s_umount_key; @@ -1939,7 +1896,7 @@ extern int iterate_mounts(int (*)(struct vfsmount *, void *), void *, extern int vfs_statfs(struct path *, struct kstatfs *); extern int user_statfs(const char __user *, struct kstatfs *); extern int fd_statfs(int, struct kstatfs *); -extern int statfs_by_dentry(struct dentry *, struct kstatfs *); +extern int vfs_ustat(dev_t, struct kstatfs *); extern int freeze_super(struct super_block *super); extern int thaw_super(struct super_block *super); extern bool our_mnt(struct vfsmount *mnt); @@ -2054,8 +2011,8 @@ extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs, extern int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len); extern long do_sys_open(int dfd, const char __user *filename, int flags, - int mode); -extern struct file *filp_open(const char *, int, int); + umode_t mode); +extern struct file *filp_open(const char *, int, umode_t); extern struct file *file_open_root(struct dentry *, struct vfsmount *, const char *, int); extern struct file * dentry_open(struct dentry *, struct vfsmount *, int, @@ -2092,6 +2049,7 @@ extern void bd_forget(struct inode *inode); extern void bdput(struct block_device *); extern void invalidate_bdev(struct block_device *); extern int sync_blockdev(struct block_device *bdev); +extern void kill_bdev(struct block_device *); extern struct super_block *freeze_bdev(struct block_device *); extern void emergency_thaw_all(void); extern int thaw_bdev(struct block_device *bdev, struct super_block *sb); @@ -2099,6 +2057,7 @@ extern int fsync_bdev(struct block_device *); #else static inline void bd_forget(struct inode *inode) {} static inline int sync_blockdev(struct block_device *bdev) { return 0; } +static inline void kill_bdev(struct block_device *bdev) {} static inline void invalidate_bdev(struct block_device *bdev) {} static inline struct super_block *freeze_bdev(struct block_device *sb) @@ -2191,8 +2150,6 @@ extern const struct file_operations read_pipefifo_fops; extern const struct file_operations write_pipefifo_fops; extern const struct file_operations rdwr_pipefifo_fops; -extern int fs_may_remount_ro(struct super_block *); - #ifdef CONFIG_BLOCK /* * return READ, READA, or WRITE @@ -2415,6 +2372,7 @@ extern ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos); extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end, int datasync); +extern void block_sync_page(struct page *page); /* fs/splice.c */ extern ssize_t generic_file_splice_read(struct file *, loff_t *, @@ -2531,7 +2489,6 @@ extern void put_filesystem(struct file_system_type *fs); extern struct file_system_type *get_fs_type(const char *name); extern struct super_block *get_super(struct block_device *); extern struct super_block *get_active_super(struct block_device *bdev); -extern struct super_block *user_get_super(dev_t); extern void drop_super(struct super_block *sb); extern void iterate_supers(void (*)(struct super_block *, void *), void *); extern void iterate_supers_type(struct file_system_type *, @@ -2590,7 +2547,7 @@ extern void setattr_copy(struct inode *inode, const struct iattr *attr); extern void file_update_time(struct file *file); -extern int generic_show_options(struct seq_file *m, struct vfsmount *mnt); +extern int generic_show_options(struct seq_file *m, struct dentry *root); extern void save_mount_options(struct super_block *sb, char *options); extern void replace_mount_options(struct super_block *sb, char *options); @@ -2691,7 +2648,7 @@ int __init get_filesystem_list(char *buf); #define OPEN_FMODE(flag) ((__force fmode_t)(((flag + 1) & O_ACCMODE) | \ (flag & __FMODE_NONOTIFY))) -static inline int is_sxid(mode_t mode) +static inline int is_sxid(umode_t mode) { return (mode & S_ISUID) || ((mode & S_ISGID) && (mode & S_IXGRP)); } |