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 22 /* 4 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 */
31 #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
33 #define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES)
35 #define ceph_set_mount_opt(fsc, opt) \
36 (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
37 #define ceph_test_mount_opt(fsc, opt) \
38 (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
40 #define CEPH_RSIZE_DEFAULT 0 /* max read size */
41 #define CEPH_RASIZE_DEFAULT (8192*1024) /* readahead */
42 #define CEPH_MAX_READDIR_DEFAULT 1024
43 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
44 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
46 struct ceph_mount_options {
50 int wsize; /* max write size */
51 int rsize; /* max read size */
52 int rasize; /* max readahead */
53 int congestion_kb; /* max writeback in flight */
54 int caps_wanted_delay_min, caps_wanted_delay_max;
55 int cap_release_safety;
56 int max_readdir; /* max readdir result (entires) */
57 int max_readdir_bytes; /* max readdir result (bytes) */
60 * everything above this point can be memcmp'd; everything below
61 * is handled in compare_mount_options()
64 char *snapdir_name; /* default ".snap" */
67 struct ceph_fs_client {
68 struct super_block *sb;
70 struct ceph_mount_options *mount_options;
71 struct ceph_client *client;
73 unsigned long mount_state;
74 int min_caps; /* min caps i added */
76 struct ceph_mds_client *mdsc;
79 mempool_t *wb_pagevec_pool;
80 struct workqueue_struct *wb_wq;
81 struct workqueue_struct *pg_inv_wq;
82 struct workqueue_struct *trunc_wq;
83 atomic_long_t writeback_count;
85 struct backing_dev_info backing_dev_info;
87 #ifdef CONFIG_DEBUG_FS
88 struct dentry *debugfs_dentry_lru, *debugfs_caps;
89 struct dentry *debugfs_congestion_kb;
90 struct dentry *debugfs_bdi;
91 struct dentry *debugfs_mdsc, *debugfs_mdsmap;
97 * File i/o capability. This tracks shared state with the metadata
98 * server that allows us to cache or writeback attributes or to read
99 * and write data. For any given inode, we should have one or more
100 * capabilities, one issued by each metadata server, and our
101 * cumulative access is the OR of all issued capabilities.
103 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
104 * session capability lists.
107 struct ceph_inode_info *ci;
108 struct rb_node ci_node; /* per-ci cap tree */
109 struct ceph_mds_session *session;
110 struct list_head session_caps; /* per-session caplist */
112 u64 cap_id; /* unique cap id (mds provided) */
113 int issued; /* latest, from the mds */
114 int implemented; /* implemented superset of issued (for revocation) */
116 u32 seq, issue_seq, mseq;
117 u32 cap_gen; /* active/stale cycle */
118 unsigned long last_used;
119 struct list_head caps_item;
122 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
123 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
124 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
127 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
128 * we first complete any in-process sync writes and writeback any dirty
129 * data before flushing the snapped state (tracked here) back to the MDS.
131 struct ceph_cap_snap {
133 struct ceph_inode_info *ci;
134 struct list_head ci_item, flushing_item;
136 u64 follows, flush_tid;
138 struct ceph_snap_context *context;
144 struct ceph_buffer *xattr_blob;
148 struct timespec mtime, atime, ctime;
150 int writing; /* a sync write is still in progress */
151 int dirty_pages; /* dirty pages awaiting writeback */
154 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
156 if (atomic_dec_and_test(&capsnap->nref)) {
157 if (capsnap->xattr_blob)
158 ceph_buffer_put(capsnap->xattr_blob);
164 * The frag tree describes how a directory is fragmented, potentially across
165 * multiple metadata servers. It is also used to indicate points where
166 * metadata authority is delegated, and whether/where metadata is replicated.
168 * A _leaf_ frag will be present in the i_fragtree IFF there is
169 * delegation info. That is, if mds >= 0 || ndist > 0.
171 #define CEPH_MAX_DIRFRAG_REP 4
173 struct ceph_inode_frag {
178 int split_by; /* i.e. 2^(split_by) children */
180 /* delegation and replication info */
181 int mds; /* -1 if same authority as parent */
182 int ndist; /* >0 if replicated */
183 int dist[CEPH_MAX_DIRFRAG_REP];
187 * We cache inode xattrs as an encoded blob until they are first used,
188 * at which point we parse them into an rbtree.
190 struct ceph_inode_xattr {
199 int should_free_name;
206 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;
217 struct ceph_inode_xattrs_info {
219 * (still encoded) xattr blob. we avoid the overhead of parsing
220 * this until someone actually calls getxattr, etc.
222 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
223 * NULL means we don't know.
225 struct ceph_buffer *blob, *prealloc_blob;
227 struct rb_root index;
232 u64 version, index_version;
238 struct ceph_inode_info {
239 struct ceph_vino i_vino; /* ceph ino + snap */
241 spinlock_t i_ceph_lock;
246 unsigned i_ceph_flags;
247 atomic_t i_release_count;
248 atomic_t i_complete_count;
250 struct ceph_dir_layout i_dir_layout;
251 struct ceph_file_layout i_layout;
255 struct timespec i_rctime;
256 u64 i_rbytes, i_rfiles, i_rsubdirs;
257 u64 i_files, i_subdirs;
258 u64 i_max_offset; /* largest readdir offset, set with complete dir */
260 struct rb_root i_fragtree;
261 struct mutex i_fragtree_mutex;
263 struct ceph_inode_xattrs_info i_xattrs;
265 /* capabilities. protected _both_ by i_ceph_lock and cap->session's
267 struct rb_root i_caps; /* cap list */
268 struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
269 unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
270 struct list_head i_dirty_item, i_flushing_item;
272 /* we need to track cap writeback on a per-cap-bit basis, to allow
273 * overlapping, pipelined cap flushes to the mds. we can probably
274 * reduce the tid to 8 bits if we're concerned about inode size. */
275 u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS];
276 wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
277 unsigned long i_hold_caps_min; /* jiffies */
278 unsigned long i_hold_caps_max; /* jiffies */
279 struct list_head i_cap_delay_list; /* for delayed cap release to mds */
280 int i_cap_exporting_mds; /* to handle cap migration between */
281 unsigned i_cap_exporting_mseq; /* mds's. */
282 unsigned i_cap_exporting_issued;
283 struct ceph_cap_reservation i_cap_migration_resv;
284 struct list_head i_cap_snaps; /* snapped state pending flush to mds */
285 struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
286 dirty|flushing caps */
287 unsigned i_snap_caps; /* cap bits for snapped files */
289 int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */
291 struct mutex i_truncate_mutex;
292 u32 i_truncate_seq; /* last truncate to smaller size */
293 u64 i_truncate_size; /* and the size we last truncated down to */
294 int i_truncate_pending; /* still need to call vmtruncate */
296 u64 i_max_size; /* max file size authorized by mds */
297 u64 i_reported_size; /* (max_)size reported to or requested of mds */
298 u64 i_wanted_max_size; /* offset we'd like to write too */
299 u64 i_requested_max_size; /* max_size we've requested */
301 /* held references to caps */
303 int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref;
304 int i_wrbuffer_ref, i_wrbuffer_ref_head;
305 u32 i_shared_gen; /* increment each time we get FILE_SHARED */
306 u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
307 u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
309 struct list_head i_unsafe_writes; /* uncommitted sync writes */
310 struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
311 spinlock_t i_unsafe_lock;
313 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
314 int i_snap_realm_counter; /* snap realm (if caps) */
315 struct list_head i_snap_realm_item;
316 struct list_head i_snap_flush_item;
318 struct work_struct i_wb_work; /* writeback work */
319 struct work_struct i_pg_inv_work; /* page invalidation work */
321 struct work_struct i_vmtruncate_work;
323 struct inode vfs_inode; /* at end */
326 static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
328 return container_of(inode, struct ceph_inode_info, vfs_inode);
331 static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
333 return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
336 static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
338 return (struct ceph_fs_client *)sb->s_fs_info;
341 static inline struct ceph_vino ceph_vino(struct inode *inode)
343 return ceph_inode(inode)->i_vino;
347 * ino_t is <64 bits on many architectures, blech.
349 * i_ino (kernel inode) st_ino (userspace)
354 static inline u32 ceph_ino_to_ino32(__u64 vino)
356 u32 ino = vino & 0xffffffff;
366 static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
368 #if BITS_PER_LONG == 32
369 return ceph_ino_to_ino32(vino.ino);
371 return (ino_t)vino.ino;
376 * user-visible ino (stat, filldir)
378 #if BITS_PER_LONG == 32
379 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
384 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
386 if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
387 ino = ceph_ino_to_ino32(ino);
393 /* for printf-style formatting */
394 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
396 static inline u64 ceph_ino(struct inode *inode)
398 return ceph_inode(inode)->i_vino.ino;
400 static inline u64 ceph_snap(struct inode *inode)
402 return ceph_inode(inode)->i_vino.snap;
405 static inline int ceph_ino_compare(struct inode *inode, void *data)
407 struct ceph_vino *pvino = (struct ceph_vino *)data;
408 struct ceph_inode_info *ci = ceph_inode(inode);
409 return ci->i_vino.ino == pvino->ino &&
410 ci->i_vino.snap == pvino->snap;
413 static inline struct inode *ceph_find_inode(struct super_block *sb,
414 struct ceph_vino vino)
416 ino_t t = ceph_vino_to_ino(vino);
417 return ilookup5(sb, t, ceph_ino_compare, &vino);
424 #define CEPH_I_NODELAY 4 /* do not delay cap release */
425 #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
426 #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
428 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
431 atomic_set(&ci->i_complete_count, release_count);
434 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
436 atomic_inc(&ci->i_release_count);
439 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
441 return atomic_read(&ci->i_complete_count) ==
442 atomic_read(&ci->i_release_count);
445 static inline void ceph_dir_clear_complete(struct inode *inode)
447 __ceph_dir_clear_complete(ceph_inode(inode));
450 static inline bool ceph_dir_is_complete(struct inode *inode)
452 return __ceph_dir_is_complete(ceph_inode(inode));
456 /* find a specific frag @f */
457 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
461 * choose fragment for value @v. copy frag content to pfrag, if leaf
464 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
465 struct ceph_inode_frag *pfrag,
468 static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
470 return (struct ceph_dentry_info *)dentry->d_fsdata;
473 static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
475 return ((loff_t)frag << 32) | (loff_t)off;
481 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
483 return !RB_EMPTY_ROOT(&ci->i_caps);
486 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
487 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
488 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
489 struct ceph_cap *cap);
491 static inline int ceph_caps_issued(struct ceph_inode_info *ci)
494 spin_lock(&ci->i_ceph_lock);
495 issued = __ceph_caps_issued(ci, NULL);
496 spin_unlock(&ci->i_ceph_lock);
500 static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
504 spin_lock(&ci->i_ceph_lock);
505 r = __ceph_caps_issued_mask(ci, mask, touch);
506 spin_unlock(&ci->i_ceph_lock);
510 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
512 return ci->i_dirty_caps | ci->i_flushing_caps;
514 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask);
516 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
517 extern int __ceph_caps_used(struct ceph_inode_info *ci);
519 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
522 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
524 static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
526 int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
527 if (w & CEPH_CAP_FILE_BUFFER)
528 w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */
532 /* what the mds thinks we want */
533 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci);
535 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
536 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
537 extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
538 extern void ceph_reserve_caps(struct ceph_mds_client *mdsc,
539 struct ceph_cap_reservation *ctx, int need);
540 extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
541 struct ceph_cap_reservation *ctx);
542 extern void ceph_reservation_status(struct ceph_fs_client *client,
543 int *total, int *avail, int *used,
544 int *reserved, int *min);
549 * we keep buffered readdir results attached to file->private_data
551 #define CEPH_F_SYNC 1
552 #define CEPH_F_ATEND 2
554 struct ceph_file_info {
555 short fmode; /* initialized on open */
556 short flags; /* CEPH_F_* */
558 /* readdir: position within the dir */
560 struct ceph_mds_request *last_readdir;
562 /* readdir: position within a frag */
563 unsigned offset; /* offset of last chunk, adjusted for . and .. */
564 u64 next_offset; /* offset of next chunk (last_name's + 1) */
565 char *last_name; /* last entry in previous chunk */
566 struct dentry *dentry; /* next dentry (for dcache readdir) */
567 int dir_release_count;
569 /* used for -o dirstat read() on directory thing */
577 * A "snap realm" describes a subset of the file hierarchy sharing
578 * the same set of snapshots that apply to it. The realms themselves
579 * are organized into a hierarchy, such that children inherit (some of)
580 * the snapshots of their parents.
582 * All inodes within the realm that have capabilities are linked into a
585 struct ceph_snap_realm {
592 u64 parent_since; /* snapid when our current parent became so */
594 u64 *prior_parent_snaps; /* snaps inherited from any parents we */
595 u32 num_prior_parent_snaps; /* had prior to parent_since */
596 u64 *snaps; /* snaps specific to this realm */
599 struct ceph_snap_realm *parent;
600 struct list_head children; /* list of child realms */
601 struct list_head child_item;
603 struct list_head empty_item; /* if i have ref==0 */
605 struct list_head dirty_item; /* if realm needs new context */
607 /* the current set of snaps for this realm */
608 struct ceph_snap_context *cached_context;
610 struct list_head inodes_with_caps;
611 spinlock_t inodes_with_caps_lock;
614 static inline int default_congestion_kb(void)
621 * congestion size, scale with available memory.
633 * This allows larger machines to have larger/more transfers.
634 * Limit the default to 256M
636 congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
637 if (congestion_kb > 256*1024)
638 congestion_kb = 256*1024;
640 return congestion_kb;
646 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
648 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
649 struct ceph_snap_realm *realm);
650 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
651 struct ceph_snap_realm *realm);
652 extern int ceph_update_snap_trace(struct ceph_mds_client *m,
653 void *p, void *e, bool deletion);
654 extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
655 struct ceph_mds_session *session,
656 struct ceph_msg *msg);
657 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
658 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
659 struct ceph_cap_snap *capsnap);
660 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
663 * a cap_snap is "pending" if it is still awaiting an in-progress
664 * sync write (that may/may not still update size, mtime, etc.).
666 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
668 return !list_empty(&ci->i_cap_snaps) &&
669 list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap,
674 extern const struct inode_operations ceph_file_iops;
676 extern struct inode *ceph_alloc_inode(struct super_block *sb);
677 extern void ceph_destroy_inode(struct inode *inode);
679 extern struct inode *ceph_get_inode(struct super_block *sb,
680 struct ceph_vino vino);
681 extern struct inode *ceph_lookup_inode(struct super_block *sb,
682 struct ceph_vino vino);
683 extern struct inode *ceph_get_snapdir(struct inode *parent);
684 extern int ceph_fill_file_size(struct inode *inode, int issued,
685 u32 truncate_seq, u64 truncate_size, u64 size);
686 extern void ceph_fill_file_time(struct inode *inode, int issued,
687 u64 time_warp_seq, struct timespec *ctime,
688 struct timespec *mtime, struct timespec *atime);
689 extern int ceph_fill_trace(struct super_block *sb,
690 struct ceph_mds_request *req,
691 struct ceph_mds_session *session);
692 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
693 struct ceph_mds_session *session);
695 extern int ceph_inode_holds_cap(struct inode *inode, int mask);
697 extern int ceph_inode_set_size(struct inode *inode, loff_t size);
698 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
699 extern void ceph_queue_vmtruncate(struct inode *inode);
701 extern void ceph_queue_invalidate(struct inode *inode);
702 extern void ceph_queue_writeback(struct inode *inode);
704 extern int ceph_do_getattr(struct inode *inode, int mask);
705 extern int ceph_permission(struct inode *inode, int mask);
706 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
707 extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
711 extern int ceph_setxattr(struct dentry *, const char *, const void *,
713 extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t);
714 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
715 extern int ceph_removexattr(struct dentry *, const char *);
716 extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
717 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
718 extern void __init ceph_xattr_init(void);
719 extern void ceph_xattr_exit(void);
722 extern const char *ceph_cap_string(int c);
723 extern void ceph_handle_caps(struct ceph_mds_session *session,
724 struct ceph_msg *msg);
725 extern int ceph_add_cap(struct inode *inode,
726 struct ceph_mds_session *session, u64 cap_id,
727 int fmode, unsigned issued, unsigned wanted,
728 unsigned cap, unsigned seq, u64 realmino, int flags,
729 struct ceph_cap_reservation *caps_reservation);
730 extern void __ceph_remove_cap(struct ceph_cap *cap);
731 static inline void ceph_remove_cap(struct ceph_cap *cap)
733 spin_lock(&cap->ci->i_ceph_lock);
734 __ceph_remove_cap(cap);
735 spin_unlock(&cap->ci->i_ceph_lock);
737 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
738 struct ceph_cap *cap);
740 extern void __queue_cap_release(struct ceph_mds_session *session, u64 ino,
741 u64 cap_id, u32 migrate_seq, u32 issue_seq);
742 extern void ceph_queue_caps_release(struct inode *inode);
743 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
744 extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
746 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
747 struct ceph_mds_session *session);
748 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
750 extern int ceph_get_cap_mds(struct inode *inode);
751 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
752 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
753 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
754 struct ceph_snap_context *snapc);
755 extern void __ceph_flush_snaps(struct ceph_inode_info *ci,
756 struct ceph_mds_session **psession,
758 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
759 struct ceph_mds_session *session);
760 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
761 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
763 extern int ceph_encode_inode_release(void **p, struct inode *inode,
764 int mds, int drop, int unless, int force);
765 extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
766 int mds, int drop, int unless);
768 extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
769 int *got, loff_t endoff);
771 /* for counting open files by mode */
772 static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode)
774 ci->i_nr_by_mode[mode]++;
776 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
779 extern const struct address_space_operations ceph_aops;
780 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
783 extern const struct file_operations ceph_file_fops;
784 extern const struct address_space_operations ceph_aops;
786 extern int ceph_open(struct inode *inode, struct file *file);
787 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
788 struct file *file, unsigned flags, umode_t mode,
790 extern int ceph_release(struct inode *inode, struct file *filp);
793 extern const struct file_operations ceph_dir_fops;
794 extern const struct inode_operations ceph_dir_iops;
795 extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
796 ceph_snapdir_dentry_ops;
798 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
799 extern int ceph_handle_snapdir(struct ceph_mds_request *req,
800 struct dentry *dentry, int err);
801 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
802 struct dentry *dentry, int err);
804 extern void ceph_dentry_lru_add(struct dentry *dn);
805 extern void ceph_dentry_lru_touch(struct dentry *dn);
806 extern void ceph_dentry_lru_del(struct dentry *dn);
807 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
808 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
809 extern struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry);
812 * our d_ops vary depending on whether the inode is live,
813 * snapshotted (read-only), or a virtual ".snap" directory.
815 int ceph_init_dentry(struct dentry *dentry);
819 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
822 extern const struct export_operations ceph_export_ops;
825 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
826 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
827 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
828 extern int ceph_encode_locks_to_buffer(struct inode *inode,
829 struct ceph_filelock *flocks,
831 int num_flock_locks);
832 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
833 struct ceph_pagelist *pagelist,
834 int num_fcntl_locks, int num_flock_locks);
835 extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c);
838 extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
839 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
841 #endif /* _FS_CEPH_SUPER_H */