1 #ifndef _FS_CEPH_SUPER_H
2 #define _FS_CEPH_SUPER_H
4 #include <linux/ceph/ceph_debug.h>
6 #include <asm/unaligned.h>
7 #include <linux/backing-dev.h>
8 #include <linux/completion.h>
9 #include <linux/exportfs.h>
11 #include <linux/mempool.h>
12 #include <linux/pagemap.h>
13 #include <linux/wait.h>
14 #include <linux/writeback.h>
15 #include <linux/slab.h>
17 #include <linux/ceph/libceph.h>
19 /* f_type in struct statfs */
20 #define CEPH_SUPER_MAGIC 0x00c36400
22 /* large granularity for statfs utilization stats to facilitate
23 * large volume sizes on 32-bit machines. */
24 #define CEPH_BLOCK_SHIFT 20 /* 1 MB */
25 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
27 #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
28 #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
29 #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
30 #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
32 #define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES)
34 #define ceph_set_mount_opt(fsc, opt) \
35 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
36 #define ceph_test_mount_opt(fsc, opt) \
37 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
39 #define CEPH_RSIZE_DEFAULT 0 /* max read size */
40 #define CEPH_RASIZE_DEFAULT (8192*1024) /* readahead */
41 #define CEPH_MAX_READDIR_DEFAULT 1024
42 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
43 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
45 struct ceph_mount_options {
49 int wsize; /* max write size */
50 int rsize; /* max read size */
51 int rasize; /* max readahead */
52 int congestion_kb; /* max writeback in flight */
53 int caps_wanted_delay_min, caps_wanted_delay_max;
54 int cap_release_safety;
55 int max_readdir; /* max readdir result (entires) */
56 int max_readdir_bytes; /* max readdir result (bytes) */
59 * everything above this point can be memcmp'd; everything below
60 * is handled in compare_mount_options()
63 char *snapdir_name; /* default ".snap" */
66 struct ceph_fs_client {
67 struct super_block *sb;
69 struct ceph_mount_options *mount_options;
70 struct ceph_client *client;
72 unsigned long mount_state;
73 int min_caps; /* min caps i added */
75 struct ceph_mds_client *mdsc;
78 mempool_t *wb_pagevec_pool;
79 struct workqueue_struct *wb_wq;
80 struct workqueue_struct *pg_inv_wq;
81 struct workqueue_struct *trunc_wq;
82 atomic_long_t writeback_count;
84 struct backing_dev_info backing_dev_info;
86 #ifdef CONFIG_DEBUG_FS
87 struct dentry *debugfs_dentry_lru, *debugfs_caps;
88 struct dentry *debugfs_congestion_kb;
89 struct dentry *debugfs_bdi;
90 struct dentry *debugfs_mdsc, *debugfs_mdsmap;
96 * File i/o capability. This tracks shared state with the metadata
97 * server that allows us to cache or writeback attributes or to read
98 * and write data. For any given inode, we should have one or more
99 * capabilities, one issued by each metadata server, and our
100 * cumulative access is the OR of all issued capabilities.
102 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
103 * session capability lists.
106 struct ceph_inode_info *ci;
107 struct rb_node ci_node; /* per-ci cap tree */
108 struct ceph_mds_session *session;
109 struct list_head session_caps; /* per-session caplist */
111 u64 cap_id; /* unique cap id (mds provided) */
112 int issued; /* latest, from the mds */
113 int implemented; /* implemented superset of issued (for revocation) */
115 u32 seq, issue_seq, mseq;
116 u32 cap_gen; /* active/stale cycle */
117 unsigned long last_used;
118 struct list_head caps_item;
121 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
122 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
123 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
126 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
127 * we first complete any in-process sync writes and writeback any dirty
128 * data before flushing the snapped state (tracked here) back to the MDS.
130 struct ceph_cap_snap {
132 struct ceph_inode_info *ci;
133 struct list_head ci_item, flushing_item;
135 u64 follows, flush_tid;
137 struct ceph_snap_context *context;
143 struct ceph_buffer *xattr_blob;
147 struct timespec mtime, atime, ctime;
149 int writing; /* a sync write is still in progress */
150 int dirty_pages; /* dirty pages awaiting writeback */
153 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
155 if (atomic_dec_and_test(&capsnap->nref)) {
156 if (capsnap->xattr_blob)
157 ceph_buffer_put(capsnap->xattr_blob);
163 * The frag tree describes how a directory is fragmented, potentially across
164 * multiple metadata servers. It is also used to indicate points where
165 * metadata authority is delegated, and whether/where metadata is replicated.
167 * A _leaf_ frag will be present in the i_fragtree IFF there is
168 * delegation info. That is, if mds >= 0 || ndist > 0.
170 #define CEPH_MAX_DIRFRAG_REP 4
172 struct ceph_inode_frag {
177 int split_by; /* i.e. 2^(split_by) children */
179 /* delegation and replication info */
180 int mds; /* -1 if same authority as parent */
181 int ndist; /* >0 if replicated */
182 int dist[CEPH_MAX_DIRFRAG_REP];
186 * We cache inode xattrs as an encoded blob until they are first used,
187 * at which point we parse them into an rbtree.
189 struct ceph_inode_xattr {
198 int should_free_name;
205 struct ceph_dentry_info {
207 struct ceph_mds_session *lease_session;
208 u32 lease_gen, lease_shared_gen;
210 unsigned long lease_renew_after, lease_renew_from;
211 struct list_head lru;
212 struct dentry *dentry;
220 * The locking for D_COMPLETE is a bit odd:
221 * - we can clear it at almost any time (see ceph_d_prune)
222 * - it is only meaningful if:
223 * - we hold dir inode i_lock
224 * - we hold dir FILE_SHARED caps
225 * - the dentry D_COMPLETE is set
227 #define CEPH_D_COMPLETE 1 /* if set, d_u.d_subdirs is complete directory */
229 struct ceph_inode_xattrs_info {
231 * (still encoded) xattr blob. we avoid the overhead of parsing
232 * this until someone actually calls getxattr, etc.
234 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
235 * NULL means we don't know.
237 struct ceph_buffer *blob, *prealloc_blob;
239 struct rb_root index;
244 u64 version, index_version;
250 struct ceph_inode_info {
251 struct ceph_vino i_vino; /* ceph ino + snap */
256 unsigned i_ceph_flags;
257 unsigned long i_release_count;
259 struct ceph_dir_layout i_dir_layout;
260 struct ceph_file_layout i_layout;
264 struct timespec i_rctime;
265 u64 i_rbytes, i_rfiles, i_rsubdirs;
266 u64 i_files, i_subdirs;
267 u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */
269 struct rb_root i_fragtree;
270 struct mutex i_fragtree_mutex;
272 struct ceph_inode_xattrs_info i_xattrs;
274 /* capabilities. protected _both_ by i_lock and cap->session's
276 struct rb_root i_caps; /* cap list */
277 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
278 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
279 struct list_head i_dirty_item, i_flushing_item;
281 /* we need to track cap writeback on a per-cap-bit basis, to allow
282 * overlapping, pipelined cap flushes to the mds. we can probably
283 * reduce the tid to 8 bits if we're concerned about inode size. */
284 u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS];
285 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
286 unsigned long i_hold_caps_min; /* jiffies */
287 unsigned long i_hold_caps_max; /* jiffies */
288 struct list_head i_cap_delay_list; /* for delayed cap release to mds */
289 int i_cap_exporting_mds; /* to handle cap migration between */
290 unsigned i_cap_exporting_mseq; /* mds's. */
291 unsigned i_cap_exporting_issued;
292 struct ceph_cap_reservation i_cap_migration_resv;
293 struct list_head i_cap_snaps; /* snapped state pending flush to mds */
294 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
295 dirty|flushing caps */
296 unsigned i_snap_caps; /* cap bits for snapped files */
298 int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */
300 u32 i_truncate_seq; /* last truncate to smaller size */
301 u64 i_truncate_size; /* and the size we last truncated down to */
302 int i_truncate_pending; /* still need to call vmtruncate */
304 u64 i_max_size; /* max file size authorized by mds */
305 u64 i_reported_size; /* (max_)size reported to or requested of mds */
306 u64 i_wanted_max_size; /* offset we'd like to write too */
307 u64 i_requested_max_size; /* max_size we've requested */
309 /* held references to caps */
311 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref;
312 int i_wrbuffer_ref, i_wrbuffer_ref_head;
313 u32 i_shared_gen; /* increment each time we get FILE_SHARED */
314 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
315 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
317 struct list_head i_unsafe_writes; /* uncommitted sync writes */
318 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
319 spinlock_t i_unsafe_lock;
321 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
322 int i_snap_realm_counter; /* snap realm (if caps) */
323 struct list_head i_snap_realm_item;
324 struct list_head i_snap_flush_item;
326 struct work_struct i_wb_work; /* writeback work */
327 struct work_struct i_pg_inv_work; /* page invalidation work */
329 struct work_struct i_vmtruncate_work;
331 struct inode vfs_inode; /* at end */
334 static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
336 return container_of(inode, struct ceph_inode_info, vfs_inode);
339 static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
341 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
344 static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
346 return (struct ceph_fs_client *)sb->s_fs_info;
349 static inline struct ceph_vino ceph_vino(struct inode *inode)
351 return ceph_inode(inode)->i_vino;
355 * ino_t is <64 bits on many architectures, blech.
357 * i_ino (kernel inode) st_ino (userspace)
362 static inline u32 ceph_ino_to_ino32(__u64 vino)
364 u32 ino = vino & 0xffffffff;
374 static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
376 #if BITS_PER_LONG == 32
377 return ceph_ino_to_ino32(vino.ino);
379 return (ino_t)vino.ino;
384 * user-visible ino (stat, filldir)
386 #if BITS_PER_LONG == 32
387 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
392 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
394 if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
395 ino = ceph_ino_to_ino32(ino);
401 /* for printf-style formatting */
402 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
404 static inline u64 ceph_ino(struct inode *inode)
406 return ceph_inode(inode)->i_vino.ino;
408 static inline u64 ceph_snap(struct inode *inode)
410 return ceph_inode(inode)->i_vino.snap;
413 static inline int ceph_ino_compare(struct inode *inode, void *data)
415 struct ceph_vino *pvino = (struct ceph_vino *)data;
416 struct ceph_inode_info *ci = ceph_inode(inode);
417 return ci->i_vino.ino == pvino->ino &&
418 ci->i_vino.snap == pvino->snap;
421 static inline struct inode *ceph_find_inode(struct super_block *sb,
422 struct ceph_vino vino)
424 ino_t t = ceph_vino_to_ino(vino);
425 return ilookup5(sb, t, ceph_ino_compare, &vino);
432 #define CEPH_I_COMPLETE 1 /* we have complete directory cached */
433 #define CEPH_I_NODELAY 4 /* do not delay cap release */
434 #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
435 #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
437 static inline void ceph_i_clear(struct inode *inode, unsigned mask)
439 struct ceph_inode_info *ci = ceph_inode(inode);
441 spin_lock(&inode->i_lock);
442 ci->i_ceph_flags &= ~mask;
443 spin_unlock(&inode->i_lock);
446 static inline void ceph_i_set(struct inode *inode, unsigned mask)
448 struct ceph_inode_info *ci = ceph_inode(inode);
450 spin_lock(&inode->i_lock);
451 ci->i_ceph_flags |= mask;
452 spin_unlock(&inode->i_lock);
455 static inline bool ceph_i_test(struct inode *inode, unsigned mask)
457 struct ceph_inode_info *ci = ceph_inode(inode);
460 spin_lock(&inode->i_lock);
461 r = (ci->i_ceph_flags & mask) == mask;
462 spin_unlock(&inode->i_lock);
467 /* find a specific frag @f */
468 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
472 * choose fragment for value @v. copy frag content to pfrag, if leaf
475 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
476 struct ceph_inode_frag *pfrag,
479 static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
481 return (struct ceph_dentry_info *)dentry->d_fsdata;
484 static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
486 return ((loff_t)frag << 32) | (loff_t)off;
492 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
494 return !RB_EMPTY_ROOT(&ci->i_caps);
497 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
498 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
499 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
500 struct ceph_cap *cap);
502 static inline int ceph_caps_issued(struct ceph_inode_info *ci)
505 spin_lock(&ci->vfs_inode.i_lock);
506 issued = __ceph_caps_issued(ci, NULL);
507 spin_unlock(&ci->vfs_inode.i_lock);
511 static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
515 spin_lock(&ci->vfs_inode.i_lock);
516 r = __ceph_caps_issued_mask(ci, mask, touch);
517 spin_unlock(&ci->vfs_inode.i_lock);
521 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
523 return ci->i_dirty_caps | ci->i_flushing_caps;
525 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask);
527 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
528 extern int __ceph_caps_used(struct ceph_inode_info *ci);
530 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
533 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
535 static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
537 int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
538 if (w & CEPH_CAP_FILE_BUFFER)
539 w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */
543 /* what the mds thinks we want */
544 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci);
546 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
547 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
548 extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
549 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
550 struct ceph_cap_reservation *ctx, int need);
551 extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
552 struct ceph_cap_reservation *ctx);
553 extern void ceph_reservation_status(struct ceph_fs_client *client,
554 int *total, int *avail, int *used,
555 int *reserved, int *min);
560 * we keep buffered readdir results attached to file->private_data
562 #define CEPH_F_SYNC 1
563 #define CEPH_F_ATEND 2
565 struct ceph_file_info {
566 short fmode; /* initialized on open */
567 short flags; /* CEPH_F_* */
569 /* readdir: position within the dir */
571 struct ceph_mds_request *last_readdir;
573 /* readdir: position within a frag */
574 unsigned offset; /* offset of last chunk, adjusted for . and .. */
575 u64 next_offset; /* offset of next chunk (last_name's + 1) */
576 char *last_name; /* last entry in previous chunk */
577 struct dentry *dentry; /* next dentry (for dcache readdir) */
578 unsigned long dir_release_count;
580 /* used for -o dirstat read() on directory thing */
588 * A "snap realm" describes a subset of the file hierarchy sharing
589 * the same set of snapshots that apply to it. The realms themselves
590 * are organized into a hierarchy, such that children inherit (some of)
591 * the snapshots of their parents.
593 * All inodes within the realm that have capabilities are linked into a
596 struct ceph_snap_realm {
603 u64 parent_since; /* snapid when our current parent became so */
605 u64 *prior_parent_snaps; /* snaps inherited from any parents we */
606 int num_prior_parent_snaps; /* had prior to parent_since */
607 u64 *snaps; /* snaps specific to this realm */
610 struct ceph_snap_realm *parent;
611 struct list_head children; /* list of child realms */
612 struct list_head child_item;
614 struct list_head empty_item; /* if i have ref==0 */
616 struct list_head dirty_item; /* if realm needs new context */
618 /* the current set of snaps for this realm */
619 struct ceph_snap_context *cached_context;
621 struct list_head inodes_with_caps;
622 spinlock_t inodes_with_caps_lock;
625 static inline int default_congestion_kb(void)
632 * congestion size, scale with available memory.
644 * This allows larger machines to have larger/more transfers.
645 * Limit the default to 256M
647 congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
648 if (congestion_kb > 256*1024)
649 congestion_kb = 256*1024;
651 return congestion_kb;
657 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
659 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
660 struct ceph_snap_realm *realm);
661 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
662 struct ceph_snap_realm *realm);
663 extern int ceph_update_snap_trace(struct ceph_mds_client *m,
664 void *p, void *e, bool deletion);
665 extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
666 struct ceph_mds_session *session,
667 struct ceph_msg *msg);
668 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
669 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
670 struct ceph_cap_snap *capsnap);
671 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
674 * a cap_snap is "pending" if it is still awaiting an in-progress
675 * sync write (that may/may not still update size, mtime, etc.).
677 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
679 return !list_empty(&ci->i_cap_snaps) &&
680 list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap,
685 extern const struct inode_operations ceph_file_iops;
687 extern struct inode *ceph_alloc_inode(struct super_block *sb);
688 extern void ceph_destroy_inode(struct inode *inode);
690 extern struct inode *ceph_get_inode(struct super_block *sb,
691 struct ceph_vino vino);
692 extern struct inode *ceph_get_snapdir(struct inode *parent);
693 extern int ceph_fill_file_size(struct inode *inode, int issued,
694 u32 truncate_seq, u64 truncate_size, u64 size);
695 extern void ceph_fill_file_time(struct inode *inode, int issued,
696 u64 time_warp_seq, struct timespec *ctime,
697 struct timespec *mtime, struct timespec *atime);
698 extern int ceph_fill_trace(struct super_block *sb,
699 struct ceph_mds_request *req,
700 struct ceph_mds_session *session);
701 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
702 struct ceph_mds_session *session);
704 extern int ceph_inode_holds_cap(struct inode *inode, int mask);
706 extern int ceph_inode_set_size(struct inode *inode, loff_t size);
707 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
708 extern void ceph_queue_vmtruncate(struct inode *inode);
710 extern void ceph_queue_invalidate(struct inode *inode);
711 extern void ceph_queue_writeback(struct inode *inode);
713 extern int ceph_do_getattr(struct inode *inode, int mask);
714 extern int ceph_permission(struct inode *inode, int mask);
715 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
716 extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
720 extern int ceph_setxattr(struct dentry *, const char *, const void *,
722 extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t);
723 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
724 extern int ceph_removexattr(struct dentry *, const char *);
725 extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
726 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
729 extern const char *ceph_cap_string(int c);
730 extern void ceph_handle_caps(struct ceph_mds_session *session,
731 struct ceph_msg *msg);
732 extern int ceph_add_cap(struct inode *inode,
733 struct ceph_mds_session *session, u64 cap_id,
734 int fmode, unsigned issued, unsigned wanted,
735 unsigned cap, unsigned seq, u64 realmino, int flags,
736 struct ceph_cap_reservation *caps_reservation);
737 extern void __ceph_remove_cap(struct ceph_cap *cap);
738 static inline void ceph_remove_cap(struct ceph_cap *cap)
740 struct inode *inode = &cap->ci->vfs_inode;
741 spin_lock(&inode->i_lock);
742 __ceph_remove_cap(cap);
743 spin_unlock(&inode->i_lock);
745 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
746 struct ceph_cap *cap);
748 extern void ceph_queue_caps_release(struct inode *inode);
749 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
750 extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
752 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
753 struct ceph_mds_session *session);
754 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
756 extern int ceph_get_cap_mds(struct inode *inode);
757 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
758 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
759 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
760 struct ceph_snap_context *snapc);
761 extern void __ceph_flush_snaps(struct ceph_inode_info *ci,
762 struct ceph_mds_session **psession,
764 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
765 struct ceph_mds_session *session);
766 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
767 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
769 extern int ceph_encode_inode_release(void **p, struct inode *inode,
770 int mds, int drop, int unless, int force);
771 extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
772 int mds, int drop, int unless);
774 extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
775 int *got, loff_t endoff);
777 /* for counting open files by mode */
778 static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode)
780 ci->i_nr_by_mode[mode]++;
782 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
785 extern const struct address_space_operations ceph_aops;
786 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
789 extern const struct file_operations ceph_file_fops;
790 extern const struct address_space_operations ceph_aops;
791 extern int ceph_copy_to_page_vector(struct page **pages,
793 loff_t off, size_t len);
794 extern int ceph_copy_from_page_vector(struct page **pages,
796 loff_t off, size_t len);
797 extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
798 extern int ceph_open(struct inode *inode, struct file *file);
799 extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
800 struct nameidata *nd, int mode,
802 extern int ceph_release(struct inode *inode, struct file *filp);
805 extern const struct file_operations ceph_dir_fops;
806 extern const struct inode_operations ceph_dir_iops;
807 extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
808 ceph_snapdir_dentry_ops;
810 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
811 extern int ceph_handle_snapdir(struct ceph_mds_request *req,
812 struct dentry *dentry, int err);
813 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
814 struct dentry *dentry, int err);
816 extern void ceph_dentry_lru_add(struct dentry *dn);
817 extern void ceph_dentry_lru_touch(struct dentry *dn);
818 extern void ceph_dentry_lru_del(struct dentry *dn);
819 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
820 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
821 extern struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry);
824 * our d_ops vary depending on whether the inode is live,
825 * snapshotted (read-only), or a virtual ".snap" directory.
827 int ceph_init_dentry(struct dentry *dentry);
831 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
834 extern const struct export_operations ceph_export_ops;
837 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
838 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
839 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
840 extern int ceph_encode_locks(struct inode *i, struct ceph_pagelist *p,
841 int p_locks, int f_locks);
842 extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c);
845 extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
846 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
848 #endif /* _FS_CEPH_SUPER_H */