#ifndef _FS_CEPH_SUPER_H #define _FS_CEPH_SUPER_H #include "ceph_debug.h" #include <asm/unaligned.h> #include <linux/backing-dev.h> #include <linux/completion.h> #include <linux/exportfs.h> #include <linux/fs.h> #include <linux/mempool.h> #include <linux/pagemap.h> #include <linux/wait.h> #include <linux/writeback.h> #include <linux/slab.h> #include "types.h" #include "messenger.h" #include "msgpool.h" #include "mon_client.h" #include "mds_client.h" #include "osd_client.h" #include "ceph_fs.h" /* f_type in struct statfs */ #define CEPH_SUPER_MAGIC 0x00c36400 /* large granularity for statfs utilization stats to facilitate * large volume sizes on 32-bit machines. */ #define CEPH_BLOCK_SHIFT 20 /* 1 MB */ #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) /* * mount options */ #define CEPH_OPT_FSID (1<<0) #define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */ #define CEPH_OPT_MYIP (1<<2) /* specified my ip */ #define CEPH_OPT_DIRSTAT (1<<4) /* funky `cat dirname` for stats */ #define CEPH_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ #define CEPH_OPT_NOCRC (1<<6) /* no data crc on writes */ #define CEPH_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ #define CEPH_OPT_DEFAULT (CEPH_OPT_RBYTES) #define ceph_set_opt(client, opt) \ (client)->mount_args->flags |= CEPH_OPT_##opt; #define ceph_test_opt(client, opt) \ (!!((client)->mount_args->flags & CEPH_OPT_##opt)) struct ceph_mount_args { int sb_flags; int num_mon; struct ceph_entity_addr *mon_addr; int flags; int mount_timeout; int osd_idle_ttl; int caps_wanted_delay_min, caps_wanted_delay_max; struct ceph_fsid fsid; struct ceph_entity_addr my_addr; int wsize; int rsize; /* max readahead */ int max_readdir; /* max readdir size */ int congestion_kb; /* max readdir size */ int osd_timeout; int osd_keepalive_timeout; char *snapdir_name; /* default ".snap" */ char *name; char *secret; int cap_release_safety; }; /* * defaults */ #define CEPH_MOUNT_TIMEOUT_DEFAULT 60 #define CEPH_OSD_TIMEOUT_DEFAULT 60 /* seconds */ #define CEPH_OSD_KEEPALIVE_DEFAULT 5 #define CEPH_OSD_IDLE_TTL_DEFAULT 60 #define CEPH_MOUNT_RSIZE_DEFAULT (512*1024) /* readahead */ #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024) #define CEPH_MSG_MAX_DATA_LEN (16*1024*1024) #define CEPH_SNAPDIRNAME_DEFAULT ".snap" #define CEPH_AUTH_NAME_DEFAULT "guest" /* * Delay telling the MDS we no longer want caps, in case we reopen * the file. Delay a minimum amount of time, even if we send a cap * message for some other reason. Otherwise, take the oppotunity to * update the mds to avoid sending another message later. */ #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ /* mount state */ enum { CEPH_MOUNT_MOUNTING, CEPH_MOUNT_MOUNTED, CEPH_MOUNT_UNMOUNTING, CEPH_MOUNT_UNMOUNTED, CEPH_MOUNT_SHUTDOWN, }; /* * subtract jiffies */ static inline unsigned long time_sub(unsigned long a, unsigned long b) { BUG_ON(time_after(b, a)); return (long)a - (long)b; } /* * per-filesystem client state * * possibly shared by multiple mount points, if they are * mounting the same ceph filesystem/cluster. */ struct ceph_client { struct ceph_fsid fsid; bool have_fsid; struct mutex mount_mutex; /* serialize mount attempts */ struct ceph_mount_args *mount_args; struct super_block *sb; unsigned long mount_state; wait_queue_head_t auth_wq; int auth_err; int min_caps; /* min caps i added */ struct ceph_messenger *msgr; /* messenger instance */ struct ceph_mon_client monc; struct ceph_mds_client mdsc; struct ceph_osd_client osdc; /* writeback */ mempool_t *wb_pagevec_pool; struct workqueue_struct *wb_wq; struct workqueue_struct *pg_inv_wq; struct workqueue_struct *trunc_wq; atomic_long_t writeback_count; struct backing_dev_info backing_dev_info; #ifdef CONFIG_DEBUG_FS struct dentry *debugfs_monmap; struct dentry *debugfs_mdsmap, *debugfs_osdmap; struct dentry *debugfs_dir, *debugfs_dentry_lru, *debugfs_caps; struct dentry *debugfs_congestion_kb; struct dentry *debugfs_bdi; #endif }; static inline struct ceph_client *ceph_client(struct super_block *sb) { return sb->s_fs_info; } /* * File i/o capability. This tracks shared state with the metadata * server that allows us to cache or writeback attributes or to read * and write data. For any given inode, we should have one or more * capabilities, one issued by each metadata server, and our * cumulative access is the OR of all issued capabilities. * * Each cap is referenced by the inode's i_caps rbtree and by per-mds * session capability lists. */ struct ceph_cap { struct ceph_inode_info *ci; struct rb_node ci_node; /* per-ci cap tree */ struct ceph_mds_session *session; struct list_head session_caps; /* per-session caplist */ int mds; u64 cap_id; /* unique cap id (mds provided) */ int issued; /* latest, from the mds */ int implemented; /* implemented superset of issued (for revocation) */ int mds_wanted; u32 seq, issue_seq, mseq; u32 cap_gen; /* active/stale cycle */ unsigned long last_used; struct list_head caps_item; }; #define CHECK_CAPS_NODELAY 1 /* do not delay any further */ #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */ #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */ /* * Snapped cap state that is pending flush to mds. When a snapshot occurs, * we first complete any in-process sync writes and writeback any dirty * data before flushing the snapped state (tracked here) back to the MDS. */ struct ceph_cap_snap { atomic_t nref; struct ceph_inode_info *ci; struct list_head ci_item, flushing_item; u64 follows, flush_tid; int issued, dirty; struct ceph_snap_context *context; mode_t mode; uid_t uid; gid_t gid; void *xattr_blob; int xattr_len; u64 xattr_version; u64 size; struct timespec mtime, atime, ctime; u64 time_warp_seq; int writing; /* a sync write is still in progress */ int dirty_pages; /* dirty pages awaiting writeback */ }; static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) { if (atomic_dec_and_test(&capsnap->nref)) kfree(capsnap); } /* * The frag tree describes how a directory is fragmented, potentially across * multiple metadata servers. It is also used to indicate points where * metadata authority is delegated, and whether/where metadata is replicated. * * A _leaf_ frag will be present in the i_fragtree IFF there is * delegation info. That is, if mds >= 0 || ndist > 0. */ #define CEPH_MAX_DIRFRAG_REP 4 struct ceph_inode_frag { struct rb_node node; /* fragtree state */ u32 frag; int split_by; /* i.e. 2^(split_by) children */ /* delegation and replication info */ int mds; /* -1 if same authority as parent */ int ndist; /* >0 if replicated */ int dist[CEPH_MAX_DIRFRAG_REP]; }; /* * We cache inode xattrs as an encoded blob until they are first used, * at which point we parse them into an rbtree. */ struct ceph_inode_xattr { struct rb_node node; const char *name; int name_len; const char *val; int val_len; int dirty; int should_free_name; int should_free_val; }; struct ceph_inode_xattrs_info { /* * (still encoded) xattr blob. we avoid the overhead of parsing * this until someone actually calls getxattr, etc. * * blob->vec.iov_len == 4 implies there are no xattrs; blob == * NULL means we don't know. */ struct ceph_buffer *blob, *prealloc_blob; struct rb_root index; bool dirty; int count; int names_size; int vals_size; u64 version, index_version; }; /* * Ceph inode. */ #define CEPH_I_COMPLETE 1 /* we have complete directory cached */ #define CEPH_I_NODELAY 4 /* do not delay cap release */ #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */ #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */ struct ceph_inode_info { struct ceph_vino i_vino; /* ceph ino + snap */ u64 i_version; u32 i_time_warp_seq; unsigned i_ceph_flags; unsigned long i_release_count; struct ceph_file_layout i_layout; char *i_symlink; /* for dirs */ struct timespec i_rctime; u64 i_rbytes, i_rfiles, i_rsubdirs; u64 i_files, i_subdirs; u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */ struct rb_root i_fragtree; struct mutex i_fragtree_mutex; struct ceph_inode_xattrs_info i_xattrs; /* capabilities. protected _both_ by i_lock and cap->session's * s_mutex. */ struct rb_root i_caps; /* cap list */ struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ struct list_head i_dirty_item, i_flushing_item; u64 i_cap_flush_seq; /* we need to track cap writeback on a per-cap-bit basis, to allow * overlapping, pipelined cap flushes to the mds. we can probably * reduce the tid to 8 bits if we're concerned about inode size. */ u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS]; wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ unsigned long i_hold_caps_min; /* jiffies */ unsigned long i_hold_caps_max; /* jiffies */ struct list_head i_cap_delay_list; /* for delayed cap release to mds */ int i_cap_exporting_mds; /* to handle cap migration between */ unsigned i_cap_exporting_mseq; /* mds's. */ unsigned i_cap_exporting_issued; struct ceph_cap_reservation i_cap_migration_resv; struct list_head i_cap_snaps; /* snapped state pending flush to mds */ struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 */ unsigned i_snap_caps; /* cap bits for snapped files */ int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */ u32 i_truncate_seq; /* last truncate to smaller size */ u64 i_truncate_size; /* and the size we last truncated down to */ int i_truncate_pending; /* still need to call vmtruncate */ u64 i_max_size; /* max file size authorized by mds */ u64 i_reported_size; /* (max_)size reported to or requested of mds */ u64 i_wanted_max_size; /* offset we'd like to write too */ u64 i_requested_max_size; /* max_size we've requested */ /* held references to caps */ int i_pin_ref; int i_rd_ref, i_rdcache_ref, i_wr_ref; int i_wrbuffer_ref, i_wrbuffer_ref_head; u32 i_shared_gen; /* increment each time we get FILE_SHARED */ u32 i_rdcache_gen; /* we increment this each time we get FILE_CACHE. If it's non-zero, we _may_ have cached pages. */ u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ struct list_head i_unsafe_writes; /* uncommitted sync writes */ struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ spinlock_t i_unsafe_lock; struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ int i_snap_realm_counter; /* snap realm (if caps) */ struct list_head i_snap_realm_item; struct list_head i_snap_flush_item; struct work_struct i_wb_work; /* writeback work */ struct work_struct i_pg_inv_work; /* page invalidation work */ struct work_struct i_vmtruncate_work; struct inode vfs_inode; /* at end */ }; static inline struct ceph_inode_info *ceph_inode(struct inode *inode) { return container_of(inode, struct ceph_inode_info, vfs_inode); } static inline void ceph_i_clear(struct inode *inode, unsigned mask) { struct ceph_inode_info *ci = ceph_inode(inode); spin_lock(&inode->i_lock); ci->i_ceph_flags &= ~mask; spin_unlock(&inode->i_lock); } static inline void ceph_i_set(struct inode *inode, unsigned mask) { struct ceph_inode_info *ci = ceph_inode(inode); spin_lock(&inode->i_lock); ci->i_ceph_flags |= mask; spin_unlock(&inode->i_lock); } static inline bool ceph_i_test(struct inode *inode, unsigned mask) { struct ceph_inode_info *ci = ceph_inode(inode); bool r; smp_mb(); r = (ci->i_ceph_flags & mask) == mask; return r; } /* find a specific frag @f */ extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f); /* * choose fragment for value @v. copy frag content to pfrag, if leaf * exists */ extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, struct ceph_inode_frag *pfrag, int *found); /* * Ceph dentry state */ struct ceph_dentry_info { struct ceph_mds_session *lease_session; u32 lease_gen, lease_shared_gen; u32 lease_seq; unsigned long lease_renew_after, lease_renew_from; struct list_head lru; struct dentry *dentry; u64 time; u64 offset; }; static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry) { return (struct ceph_dentry_info *)dentry->d_fsdata; } static inline loff_t ceph_make_fpos(unsigned frag, unsigned off) { return ((loff_t)frag << 32) | (loff_t)off; } /* * ino_t is <64 bits on many architectures, blech. * * don't include snap in ino hash, at least for now. */ static inline ino_t ceph_vino_to_ino(struct ceph_vino vino) { ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */ #if BITS_PER_LONG == 32 ino ^= vino.ino >> (sizeof(u64)-sizeof(ino_t)) * 8; if (!ino) ino = 1; #endif return ino; } static inline int ceph_set_ino_cb(struct inode *inode, void *data) { ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); return 0; } static inline struct ceph_vino ceph_vino(struct inode *inode) { return ceph_inode(inode)->i_vino; } /* for printf-style formatting */ #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap static inline u64 ceph_ino(struct inode *inode) { return ceph_inode(inode)->i_vino.ino; } static inline u64 ceph_snap(struct inode *inode) { return ceph_inode(inode)->i_vino.snap; } static inline int ceph_ino_compare(struct inode *inode, void *data) { struct ceph_vino *pvino = (struct ceph_vino *)data; struct ceph_inode_info *ci = ceph_inode(inode); return ci->i_vino.ino == pvino->ino && ci->i_vino.snap == pvino->snap; } static inline struct inode *ceph_find_inode(struct super_block *sb, struct ceph_vino vino) { ino_t t = ceph_vino_to_ino(vino); return ilookup5(sb, t, ceph_ino_compare, &vino); } /* * caps helpers */ static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) { return !RB_EMPTY_ROOT(&ci->i_caps); } extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, struct ceph_cap *cap); static inline int ceph_caps_issued(struct ceph_inode_info *ci) { int issued; spin_lock(&ci->vfs_inode.i_lock); issued = __ceph_caps_issued(ci, NULL); spin_unlock(&ci->vfs_inode.i_lock); return issued; } static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch) { int r; spin_lock(&ci->vfs_inode.i_lock); r = __ceph_caps_issued_mask(ci, mask, touch); spin_unlock(&ci->vfs_inode.i_lock); return r; } static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) { return ci->i_dirty_caps | ci->i_flushing_caps; } extern void __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask); extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); extern int __ceph_caps_used(struct ceph_inode_info *ci); extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); /* * wanted, by virtue of open file modes AND cap refs (buffered/cached data) */ static inline int __ceph_caps_wanted(struct ceph_inode_info *ci) { int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci); if (w & CEPH_CAP_FILE_BUFFER) w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */ return w; } /* what the mds thinks we want */ extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci); extern void ceph_caps_init(void); extern void ceph_caps_finalize(void); extern void ceph_adjust_min_caps(int delta); extern int ceph_reserve_caps(struct ceph_cap_reservation *ctx, int need); extern int ceph_unreserve_caps(struct ceph_cap_reservation *ctx); extern void ceph_reservation_status(struct ceph_client *client, int *total, int *avail, int *used, int *reserved, int *min); static inline struct ceph_client *ceph_inode_to_client(struct inode *inode) { return (struct ceph_client *)inode->i_sb->s_fs_info; } static inline struct ceph_client *ceph_sb_to_client(struct super_block *sb) { return (struct ceph_client *)sb->s_fs_info; } /* * we keep buffered readdir results attached to file->private_data */ struct ceph_file_info { int fmode; /* initialized on open */ /* readdir: position within the dir */ u32 frag; struct ceph_mds_request *last_readdir; int at_end; /* readdir: position within a frag */ unsigned offset; /* offset of last chunk, adjusted for . and .. */ u64 next_offset; /* offset of next chunk (last_name's + 1) */ char *last_name; /* last entry in previous chunk */ struct dentry *dentry; /* next dentry (for dcache readdir) */ unsigned long dir_release_count; /* used for -o dirstat read() on directory thing */ char *dir_info; int dir_info_len; }; /* * snapshots */ /* * A "snap context" is the set of existing snapshots when we * write data. It is used by the OSD to guide its COW behavior. * * The ceph_snap_context is refcounted, and attached to each dirty * page, indicating which context the dirty data belonged when it was * dirtied. */ struct ceph_snap_context { atomic_t nref; u64 seq; int num_snaps; u64 snaps[]; }; static inline struct ceph_snap_context * ceph_get_snap_context(struct ceph_snap_context *sc) { /* printk("get_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref), atomic_read(&sc->nref)+1); */ if (sc) atomic_inc(&sc->nref); return sc; } static inline void ceph_put_snap_context(struct ceph_snap_context *sc) { if (!sc) return; /* printk("put_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref), atomic_read(&sc->nref)-1); */ if (atomic_dec_and_test(&sc->nref)) { /*printk(" deleting snap_context %p\n", sc);*/ kfree(sc); } } /* * A "snap realm" describes a subset of the file hierarchy sharing * the same set of snapshots that apply to it. The realms themselves * are organized into a hierarchy, such that children inherit (some of) * the snapshots of their parents. * * All inodes within the realm that have capabilities are linked into a * per-realm list. */ struct ceph_snap_realm { u64 ino; atomic_t nref; struct rb_node node; u64 created, seq; u64 parent_ino; u64 parent_since; /* snapid when our current parent became so */ u64 *prior_parent_snaps; /* snaps inherited from any parents we */ int num_prior_parent_snaps; /* had prior to parent_since */ u64 *snaps; /* snaps specific to this realm */ int num_snaps; struct ceph_snap_realm *parent; struct list_head children; /* list of child realms */ struct list_head child_item; struct list_head empty_item; /* if i have ref==0 */ /* the current set of snaps for this realm */ struct ceph_snap_context *cached_context; struct list_head inodes_with_caps; spinlock_t inodes_with_caps_lock; }; /* * calculate the number of pages a given length and offset map onto, * if we align the data. */ static inline int calc_pages_for(u64 off, u64 len) { return ((off+len+PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) - (off >> PAGE_CACHE_SHIFT); } /* snap.c */ struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, u64 ino); extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, struct ceph_snap_realm *realm); extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, struct ceph_snap_realm *realm); extern int ceph_update_snap_trace(struct ceph_mds_client *m, void *p, void *e, bool deletion); extern void ceph_handle_snap(struct ceph_mds_client *mdsc, struct ceph_mds_session *session, struct ceph_msg *msg); extern void ceph_queue_cap_snap(struct ceph_inode_info *ci); extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, struct ceph_cap_snap *capsnap); extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc); /* * a cap_snap is "pending" if it is still awaiting an in-progress * sync write (that may/may not still update size, mtime, etc.). */ static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) { return !list_empty(&ci->i_cap_snaps) && list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap, ci_item)->writing; } /* super.c */ extern struct kmem_cache *ceph_inode_cachep; extern struct kmem_cache *ceph_cap_cachep; extern struct kmem_cache *ceph_dentry_cachep; extern struct kmem_cache *ceph_file_cachep; extern const char *ceph_msg_type_name(int type); extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid); #define FSID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \ "%02x%02x%02x%02x%02x%02x" #define PR_FSID(f) (f)->fsid[0], (f)->fsid[1], (f)->fsid[2], (f)->fsid[3], \ (f)->fsid[4], (f)->fsid[5], (f)->fsid[6], (f)->fsid[7], \ (f)->fsid[8], (f)->fsid[9], (f)->fsid[10], (f)->fsid[11], \ (f)->fsid[12], (f)->fsid[13], (f)->fsid[14], (f)->fsid[15] /* inode.c */ extern const struct inode_operations ceph_file_iops; extern struct inode *ceph_alloc_inode(struct super_block *sb); extern void ceph_destroy_inode(struct inode *inode); extern struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino); extern struct inode *ceph_get_snapdir(struct inode *parent); extern int ceph_fill_file_size(struct inode *inode, int issued, u32 truncate_seq, u64 truncate_size, u64 size); extern void ceph_fill_file_time(struct inode *inode, int issued, u64 time_warp_seq, struct timespec *ctime, struct timespec *mtime, struct timespec *atime); extern int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, struct ceph_mds_session *session); extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, struct ceph_mds_session *session); extern int ceph_inode_holds_cap(struct inode *inode, int mask); extern int ceph_inode_set_size(struct inode *inode, loff_t size); extern void __ceph_do_pending_vmtruncate(struct inode *inode); extern void ceph_queue_vmtruncate(struct inode *inode); extern void ceph_queue_invalidate(struct inode *inode); extern void ceph_queue_writeback(struct inode *inode); extern int ceph_do_getattr(struct inode *inode, int mask); extern int ceph_permission(struct inode *inode, int mask); extern int ceph_setattr(struct dentry *dentry, struct iattr *attr); extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); /* xattr.c */ extern int ceph_setxattr(struct dentry *, const char *, const void *, size_t, int); extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t); extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); extern int ceph_removexattr(struct dentry *, const char *); extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci); extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); /* caps.c */ extern const char *ceph_cap_string(int c); extern void ceph_handle_caps(struct ceph_mds_session *session, struct ceph_msg *msg); extern int ceph_add_cap(struct inode *inode, struct ceph_mds_session *session, u64 cap_id, int fmode, unsigned issued, unsigned wanted, unsigned cap, unsigned seq, u64 realmino, int flags, struct ceph_cap_reservation *caps_reservation); extern void __ceph_remove_cap(struct ceph_cap *cap); static inline void ceph_remove_cap(struct ceph_cap *cap) { struct inode *inode = &cap->ci->vfs_inode; spin_lock(&inode->i_lock); __ceph_remove_cap(cap); spin_unlock(&inode->i_lock); } extern void ceph_put_cap(struct ceph_cap *cap); extern void ceph_queue_caps_release(struct inode *inode); extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); extern int ceph_fsync(struct file *file, struct dentry *dentry, int datasync); extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, struct ceph_mds_session *session); extern int ceph_get_cap_mds(struct inode *inode); extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, struct ceph_snap_context *snapc); extern void __ceph_flush_snaps(struct ceph_inode_info *ci, struct ceph_mds_session **psession); extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, struct ceph_mds_session *session); extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc); extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); extern int ceph_encode_inode_release(void **p, struct inode *inode, int mds, int drop, int unless, int force); extern int ceph_encode_dentry_release(void **p, struct dentry *dn, int mds, int drop, int unless); extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, int *got, loff_t endoff); /* for counting open files by mode */ static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode) { ci->i_nr_by_mode[mode]++; } extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode); /* addr.c */ extern const struct address_space_operations ceph_aops; extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); /* file.c */ extern const struct file_operations ceph_file_fops; extern const struct address_space_operations ceph_aops; extern int ceph_open(struct inode *inode, struct file *file); extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd, int mode, int locked_dir); extern int ceph_release(struct inode *inode, struct file *filp); extern void ceph_release_page_vector(struct page **pages, int num_pages); /* dir.c */ extern const struct file_operations ceph_dir_fops; extern const struct inode_operations ceph_dir_iops; extern struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops, ceph_snapdir_dentry_ops; extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, struct dentry *dentry, int err); extern void ceph_dentry_lru_add(struct dentry *dn); extern void ceph_dentry_lru_touch(struct dentry *dn); extern void ceph_dentry_lru_del(struct dentry *dn); /* * our d_ops vary depending on whether the inode is live, * snapshotted (read-only), or a virtual ".snap" directory. */ int ceph_init_dentry(struct dentry *dentry); /* ioctl.c */ extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); /* export.c */ extern const struct export_operations ceph_export_ops; /* debugfs.c */ extern int ceph_debugfs_init(void); extern void ceph_debugfs_cleanup(void); extern int ceph_debugfs_client_init(struct ceph_client *client); extern void ceph_debugfs_client_cleanup(struct ceph_client *client); static inline struct inode *get_dentry_parent_inode(struct dentry *dentry) { if (dentry && dentry->d_parent) return dentry->d_parent->d_inode; return NULL; } #endif /* _FS_CEPH_SUPER_H */