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 (512*1024) /* readahead */
40 #define CEPH_MAX_READDIR_DEFAULT 1024
41 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
42 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
44 struct ceph_mount_options
{
49 int rsize
; /* max readahead */
50 int congestion_kb
; /* max writeback in flight */
51 int caps_wanted_delay_min
, caps_wanted_delay_max
;
52 int cap_release_safety
;
53 int max_readdir
; /* max readdir result (entires) */
54 int max_readdir_bytes
; /* max readdir result (bytes) */
57 * everything above this point can be memcmp'd; everything below
58 * is handled in compare_mount_options()
61 char *snapdir_name
; /* default ".snap" */
64 struct ceph_fs_client
{
65 struct super_block
*sb
;
67 struct ceph_mount_options
*mount_options
;
68 struct ceph_client
*client
;
70 unsigned long mount_state
;
71 int min_caps
; /* min caps i added */
73 struct ceph_mds_client
*mdsc
;
76 mempool_t
*wb_pagevec_pool
;
77 struct workqueue_struct
*wb_wq
;
78 struct workqueue_struct
*pg_inv_wq
;
79 struct workqueue_struct
*trunc_wq
;
80 atomic_long_t writeback_count
;
82 struct backing_dev_info backing_dev_info
;
84 #ifdef CONFIG_DEBUG_FS
85 struct dentry
*debugfs_dentry_lru
, *debugfs_caps
;
86 struct dentry
*debugfs_congestion_kb
;
87 struct dentry
*debugfs_bdi
;
88 struct dentry
*debugfs_mdsc
, *debugfs_mdsmap
;
94 * File i/o capability. This tracks shared state with the metadata
95 * server that allows us to cache or writeback attributes or to read
96 * and write data. For any given inode, we should have one or more
97 * capabilities, one issued by each metadata server, and our
98 * cumulative access is the OR of all issued capabilities.
100 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
101 * session capability lists.
104 struct ceph_inode_info
*ci
;
105 struct rb_node ci_node
; /* per-ci cap tree */
106 struct ceph_mds_session
*session
;
107 struct list_head session_caps
; /* per-session caplist */
109 u64 cap_id
; /* unique cap id (mds provided) */
110 int issued
; /* latest, from the mds */
111 int implemented
; /* implemented superset of issued (for revocation) */
113 u32 seq
, issue_seq
, mseq
;
114 u32 cap_gen
; /* active/stale cycle */
115 unsigned long last_used
;
116 struct list_head caps_item
;
119 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
120 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
121 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
124 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
125 * we first complete any in-process sync writes and writeback any dirty
126 * data before flushing the snapped state (tracked here) back to the MDS.
128 struct ceph_cap_snap
{
130 struct ceph_inode_info
*ci
;
131 struct list_head ci_item
, flushing_item
;
133 u64 follows
, flush_tid
;
135 struct ceph_snap_context
*context
;
141 struct ceph_buffer
*xattr_blob
;
145 struct timespec mtime
, atime
, ctime
;
147 int writing
; /* a sync write is still in progress */
148 int dirty_pages
; /* dirty pages awaiting writeback */
151 static inline void ceph_put_cap_snap(struct ceph_cap_snap
*capsnap
)
153 if (atomic_dec_and_test(&capsnap
->nref
)) {
154 if (capsnap
->xattr_blob
)
155 ceph_buffer_put(capsnap
->xattr_blob
);
161 * The frag tree describes how a directory is fragmented, potentially across
162 * multiple metadata servers. It is also used to indicate points where
163 * metadata authority is delegated, and whether/where metadata is replicated.
165 * A _leaf_ frag will be present in the i_fragtree IFF there is
166 * delegation info. That is, if mds >= 0 || ndist > 0.
168 #define CEPH_MAX_DIRFRAG_REP 4
170 struct ceph_inode_frag
{
175 int split_by
; /* i.e. 2^(split_by) children */
177 /* delegation and replication info */
178 int mds
; /* -1 if same authority as parent */
179 int ndist
; /* >0 if replicated */
180 int dist
[CEPH_MAX_DIRFRAG_REP
];
184 * We cache inode xattrs as an encoded blob until they are first used,
185 * at which point we parse them into an rbtree.
187 struct ceph_inode_xattr
{
196 int should_free_name
;
203 struct ceph_dentry_info
{
204 struct ceph_mds_session
*lease_session
;
205 u32 lease_gen
, lease_shared_gen
;
207 unsigned long lease_renew_after
, lease_renew_from
;
208 struct list_head lru
;
209 struct dentry
*dentry
;
214 struct ceph_inode_xattrs_info
{
216 * (still encoded) xattr blob. we avoid the overhead of parsing
217 * this until someone actually calls getxattr, etc.
219 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
220 * NULL means we don't know.
222 struct ceph_buffer
*blob
, *prealloc_blob
;
224 struct rb_root index
;
229 u64 version
, index_version
;
235 struct ceph_inode_info
{
236 struct ceph_vino i_vino
; /* ceph ino + snap */
241 unsigned i_ceph_flags
;
242 unsigned long i_release_count
;
244 struct ceph_dir_layout i_dir_layout
;
245 struct ceph_file_layout i_layout
;
249 struct timespec i_rctime
;
250 u64 i_rbytes
, i_rfiles
, i_rsubdirs
;
251 u64 i_files
, i_subdirs
;
252 u64 i_max_offset
; /* largest readdir offset, set with I_COMPLETE */
254 struct rb_root i_fragtree
;
255 struct mutex i_fragtree_mutex
;
257 struct ceph_inode_xattrs_info i_xattrs
;
259 /* capabilities. protected _both_ by i_lock and cap->session's
261 struct rb_root i_caps
; /* cap list */
262 struct ceph_cap
*i_auth_cap
; /* authoritative cap, if any */
263 unsigned i_dirty_caps
, i_flushing_caps
; /* mask of dirtied fields */
264 struct list_head i_dirty_item
, i_flushing_item
;
266 /* we need to track cap writeback on a per-cap-bit basis, to allow
267 * overlapping, pipelined cap flushes to the mds. we can probably
268 * reduce the tid to 8 bits if we're concerned about inode size. */
269 u16 i_cap_flush_last_tid
, i_cap_flush_tid
[CEPH_CAP_BITS
];
270 wait_queue_head_t i_cap_wq
; /* threads waiting on a capability */
271 unsigned long i_hold_caps_min
; /* jiffies */
272 unsigned long i_hold_caps_max
; /* jiffies */
273 struct list_head i_cap_delay_list
; /* for delayed cap release to mds */
274 int i_cap_exporting_mds
; /* to handle cap migration between */
275 unsigned i_cap_exporting_mseq
; /* mds's. */
276 unsigned i_cap_exporting_issued
;
277 struct ceph_cap_reservation i_cap_migration_resv
;
278 struct list_head i_cap_snaps
; /* snapped state pending flush to mds */
279 struct ceph_snap_context
*i_head_snapc
; /* set if wr_buffer_head > 0 or
280 dirty|flushing caps */
281 unsigned i_snap_caps
; /* cap bits for snapped files */
283 int i_nr_by_mode
[CEPH_FILE_MODE_NUM
]; /* open file counts */
285 u32 i_truncate_seq
; /* last truncate to smaller size */
286 u64 i_truncate_size
; /* and the size we last truncated down to */
287 int i_truncate_pending
; /* still need to call vmtruncate */
289 u64 i_max_size
; /* max file size authorized by mds */
290 u64 i_reported_size
; /* (max_)size reported to or requested of mds */
291 u64 i_wanted_max_size
; /* offset we'd like to write too */
292 u64 i_requested_max_size
; /* max_size we've requested */
294 /* held references to caps */
296 int i_rd_ref
, i_rdcache_ref
, i_wr_ref
;
297 int i_wrbuffer_ref
, i_wrbuffer_ref_head
;
298 u32 i_shared_gen
; /* increment each time we get FILE_SHARED */
299 u32 i_rdcache_gen
; /* incremented each time we get FILE_CACHE. */
300 u32 i_rdcache_revoking
; /* RDCACHE gen to async invalidate, if any */
302 struct list_head i_unsafe_writes
; /* uncommitted sync writes */
303 struct list_head i_unsafe_dirops
; /* uncommitted mds dir ops */
304 spinlock_t i_unsafe_lock
;
306 struct ceph_snap_realm
*i_snap_realm
; /* snap realm (if caps) */
307 int i_snap_realm_counter
; /* snap realm (if caps) */
308 struct list_head i_snap_realm_item
;
309 struct list_head i_snap_flush_item
;
311 struct work_struct i_wb_work
; /* writeback work */
312 struct work_struct i_pg_inv_work
; /* page invalidation work */
314 struct work_struct i_vmtruncate_work
;
316 struct inode vfs_inode
; /* at end */
319 static inline struct ceph_inode_info
*ceph_inode(struct inode
*inode
)
321 return container_of(inode
, struct ceph_inode_info
, vfs_inode
);
324 static inline struct ceph_fs_client
*ceph_inode_to_client(struct inode
*inode
)
326 return (struct ceph_fs_client
*)inode
->i_sb
->s_fs_info
;
329 static inline struct ceph_fs_client
*ceph_sb_to_client(struct super_block
*sb
)
331 return (struct ceph_fs_client
*)sb
->s_fs_info
;
334 static inline struct ceph_vino
ceph_vino(struct inode
*inode
)
336 return ceph_inode(inode
)->i_vino
;
340 * ino_t is <64 bits on many architectures, blech.
342 * i_ino (kernel inode) st_ino (userspace)
347 static inline u32
ceph_ino_to_ino32(ino_t ino
)
349 ino
^= ino
>> (sizeof(ino
) * 8 - 32);
358 static inline ino_t
ceph_vino_to_ino(struct ceph_vino vino
)
360 ino_t ino
= (ino_t
)vino
.ino
; /* ^ (vino.snap << 20); */
361 #if BITS_PER_LONG == 32
362 ino
= ceph_ino_to_ino32(ino
);
368 * user-visible ino (stat, filldir)
370 #if BITS_PER_LONG == 32
371 static inline ino_t
ceph_translate_ino(struct super_block
*sb
, ino_t ino
)
376 static inline ino_t
ceph_translate_ino(struct super_block
*sb
, ino_t ino
)
378 if (ceph_test_mount_opt(ceph_sb_to_client(sb
), INO32
))
379 ino
= ceph_ino_to_ino32(ino
);
385 /* for printf-style formatting */
386 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
388 static inline u64
ceph_ino(struct inode
*inode
)
390 return ceph_inode(inode
)->i_vino
.ino
;
392 static inline u64
ceph_snap(struct inode
*inode
)
394 return ceph_inode(inode
)->i_vino
.snap
;
397 static inline int ceph_ino_compare(struct inode
*inode
, void *data
)
399 struct ceph_vino
*pvino
= (struct ceph_vino
*)data
;
400 struct ceph_inode_info
*ci
= ceph_inode(inode
);
401 return ci
->i_vino
.ino
== pvino
->ino
&&
402 ci
->i_vino
.snap
== pvino
->snap
;
405 static inline struct inode
*ceph_find_inode(struct super_block
*sb
,
406 struct ceph_vino vino
)
408 ino_t t
= ceph_vino_to_ino(vino
);
409 return ilookup5(sb
, t
, ceph_ino_compare
, &vino
);
416 #define CEPH_I_COMPLETE 1 /* we have complete directory cached */
417 #define CEPH_I_NODELAY 4 /* do not delay cap release */
418 #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
419 #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
421 static inline void ceph_i_clear(struct inode
*inode
, unsigned mask
)
423 struct ceph_inode_info
*ci
= ceph_inode(inode
);
425 spin_lock(&inode
->i_lock
);
426 ci
->i_ceph_flags
&= ~mask
;
427 spin_unlock(&inode
->i_lock
);
430 static inline void ceph_i_set(struct inode
*inode
, unsigned mask
)
432 struct ceph_inode_info
*ci
= ceph_inode(inode
);
434 spin_lock(&inode
->i_lock
);
435 ci
->i_ceph_flags
|= mask
;
436 spin_unlock(&inode
->i_lock
);
439 static inline bool ceph_i_test(struct inode
*inode
, unsigned mask
)
441 struct ceph_inode_info
*ci
= ceph_inode(inode
);
444 spin_lock(&inode
->i_lock
);
445 r
= (ci
->i_ceph_flags
& mask
) == mask
;
446 spin_unlock(&inode
->i_lock
);
451 /* find a specific frag @f */
452 extern struct ceph_inode_frag
*__ceph_find_frag(struct ceph_inode_info
*ci
,
456 * choose fragment for value @v. copy frag content to pfrag, if leaf
459 extern u32
ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
460 struct ceph_inode_frag
*pfrag
,
463 static inline struct ceph_dentry_info
*ceph_dentry(struct dentry
*dentry
)
465 return (struct ceph_dentry_info
*)dentry
->d_fsdata
;
468 static inline loff_t
ceph_make_fpos(unsigned frag
, unsigned off
)
470 return ((loff_t
)frag
<< 32) | (loff_t
)off
;
476 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info
*ci
)
478 return !RB_EMPTY_ROOT(&ci
->i_caps
);
481 extern int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
);
482 extern int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int t
);
483 extern int __ceph_caps_issued_other(struct ceph_inode_info
*ci
,
484 struct ceph_cap
*cap
);
486 static inline int ceph_caps_issued(struct ceph_inode_info
*ci
)
489 spin_lock(&ci
->vfs_inode
.i_lock
);
490 issued
= __ceph_caps_issued(ci
, NULL
);
491 spin_unlock(&ci
->vfs_inode
.i_lock
);
495 static inline int ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
,
499 spin_lock(&ci
->vfs_inode
.i_lock
);
500 r
= __ceph_caps_issued_mask(ci
, mask
, touch
);
501 spin_unlock(&ci
->vfs_inode
.i_lock
);
505 static inline int __ceph_caps_dirty(struct ceph_inode_info
*ci
)
507 return ci
->i_dirty_caps
| ci
->i_flushing_caps
;
509 extern void __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
);
511 extern int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
);
512 extern int __ceph_caps_used(struct ceph_inode_info
*ci
);
514 extern int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
);
517 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
519 static inline int __ceph_caps_wanted(struct ceph_inode_info
*ci
)
521 int w
= __ceph_caps_file_wanted(ci
) | __ceph_caps_used(ci
);
522 if (w
& CEPH_CAP_FILE_BUFFER
)
523 w
|= CEPH_CAP_FILE_EXCL
; /* we want EXCL if dirty data */
527 /* what the mds thinks we want */
528 extern int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
);
530 extern void ceph_caps_init(struct ceph_mds_client
*mdsc
);
531 extern void ceph_caps_finalize(struct ceph_mds_client
*mdsc
);
532 extern void ceph_adjust_min_caps(struct ceph_mds_client
*mdsc
, int delta
);
533 extern int ceph_reserve_caps(struct ceph_mds_client
*mdsc
,
534 struct ceph_cap_reservation
*ctx
, int need
);
535 extern int ceph_unreserve_caps(struct ceph_mds_client
*mdsc
,
536 struct ceph_cap_reservation
*ctx
);
537 extern void ceph_reservation_status(struct ceph_fs_client
*client
,
538 int *total
, int *avail
, int *used
,
539 int *reserved
, int *min
);
544 * we keep buffered readdir results attached to file->private_data
546 struct ceph_file_info
{
547 int fmode
; /* initialized on open */
549 /* readdir: position within the dir */
551 struct ceph_mds_request
*last_readdir
;
554 /* readdir: position within a frag */
555 unsigned offset
; /* offset of last chunk, adjusted for . and .. */
556 u64 next_offset
; /* offset of next chunk (last_name's + 1) */
557 char *last_name
; /* last entry in previous chunk */
558 struct dentry
*dentry
; /* next dentry (for dcache readdir) */
559 unsigned long dir_release_count
;
561 /* used for -o dirstat read() on directory thing */
569 * A "snap realm" describes a subset of the file hierarchy sharing
570 * the same set of snapshots that apply to it. The realms themselves
571 * are organized into a hierarchy, such that children inherit (some of)
572 * the snapshots of their parents.
574 * All inodes within the realm that have capabilities are linked into a
577 struct ceph_snap_realm
{
584 u64 parent_since
; /* snapid when our current parent became so */
586 u64
*prior_parent_snaps
; /* snaps inherited from any parents we */
587 int num_prior_parent_snaps
; /* had prior to parent_since */
588 u64
*snaps
; /* snaps specific to this realm */
591 struct ceph_snap_realm
*parent
;
592 struct list_head children
; /* list of child realms */
593 struct list_head child_item
;
595 struct list_head empty_item
; /* if i have ref==0 */
597 struct list_head dirty_item
; /* if realm needs new context */
599 /* the current set of snaps for this realm */
600 struct ceph_snap_context
*cached_context
;
602 struct list_head inodes_with_caps
;
603 spinlock_t inodes_with_caps_lock
;
606 static inline int default_congestion_kb(void)
613 * congestion size, scale with available memory.
625 * This allows larger machines to have larger/more transfers.
626 * Limit the default to 256M
628 congestion_kb
= (16*int_sqrt(totalram_pages
)) << (PAGE_SHIFT
-10);
629 if (congestion_kb
> 256*1024)
630 congestion_kb
= 256*1024;
632 return congestion_kb
;
638 struct ceph_snap_realm
*ceph_lookup_snap_realm(struct ceph_mds_client
*mdsc
,
640 extern void ceph_get_snap_realm(struct ceph_mds_client
*mdsc
,
641 struct ceph_snap_realm
*realm
);
642 extern void ceph_put_snap_realm(struct ceph_mds_client
*mdsc
,
643 struct ceph_snap_realm
*realm
);
644 extern int ceph_update_snap_trace(struct ceph_mds_client
*m
,
645 void *p
, void *e
, bool deletion
);
646 extern void ceph_handle_snap(struct ceph_mds_client
*mdsc
,
647 struct ceph_mds_session
*session
,
648 struct ceph_msg
*msg
);
649 extern void ceph_queue_cap_snap(struct ceph_inode_info
*ci
);
650 extern int __ceph_finish_cap_snap(struct ceph_inode_info
*ci
,
651 struct ceph_cap_snap
*capsnap
);
652 extern void ceph_cleanup_empty_realms(struct ceph_mds_client
*mdsc
);
655 * a cap_snap is "pending" if it is still awaiting an in-progress
656 * sync write (that may/may not still update size, mtime, etc.).
658 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info
*ci
)
660 return !list_empty(&ci
->i_cap_snaps
) &&
661 list_entry(ci
->i_cap_snaps
.prev
, struct ceph_cap_snap
,
666 extern const struct inode_operations ceph_file_iops
;
668 extern struct inode
*ceph_alloc_inode(struct super_block
*sb
);
669 extern void ceph_destroy_inode(struct inode
*inode
);
671 extern struct inode
*ceph_get_inode(struct super_block
*sb
,
672 struct ceph_vino vino
);
673 extern struct inode
*ceph_get_snapdir(struct inode
*parent
);
674 extern int ceph_fill_file_size(struct inode
*inode
, int issued
,
675 u32 truncate_seq
, u64 truncate_size
, u64 size
);
676 extern void ceph_fill_file_time(struct inode
*inode
, int issued
,
677 u64 time_warp_seq
, struct timespec
*ctime
,
678 struct timespec
*mtime
, struct timespec
*atime
);
679 extern int ceph_fill_trace(struct super_block
*sb
,
680 struct ceph_mds_request
*req
,
681 struct ceph_mds_session
*session
);
682 extern int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
683 struct ceph_mds_session
*session
);
685 extern int ceph_inode_holds_cap(struct inode
*inode
, int mask
);
687 extern int ceph_inode_set_size(struct inode
*inode
, loff_t size
);
688 extern void __ceph_do_pending_vmtruncate(struct inode
*inode
);
689 extern void ceph_queue_vmtruncate(struct inode
*inode
);
691 extern void ceph_queue_invalidate(struct inode
*inode
);
692 extern void ceph_queue_writeback(struct inode
*inode
);
694 extern int ceph_do_getattr(struct inode
*inode
, int mask
);
695 extern int ceph_permission(struct inode
*inode
, int mask
, unsigned int flags
);
696 extern int ceph_setattr(struct dentry
*dentry
, struct iattr
*attr
);
697 extern int ceph_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
701 extern int ceph_setxattr(struct dentry
*, const char *, const void *,
703 extern ssize_t
ceph_getxattr(struct dentry
*, const char *, void *, size_t);
704 extern ssize_t
ceph_listxattr(struct dentry
*, char *, size_t);
705 extern int ceph_removexattr(struct dentry
*, const char *);
706 extern void __ceph_build_xattrs_blob(struct ceph_inode_info
*ci
);
707 extern void __ceph_destroy_xattrs(struct ceph_inode_info
*ci
);
710 extern const char *ceph_cap_string(int c
);
711 extern void ceph_handle_caps(struct ceph_mds_session
*session
,
712 struct ceph_msg
*msg
);
713 extern int ceph_add_cap(struct inode
*inode
,
714 struct ceph_mds_session
*session
, u64 cap_id
,
715 int fmode
, unsigned issued
, unsigned wanted
,
716 unsigned cap
, unsigned seq
, u64 realmino
, int flags
,
717 struct ceph_cap_reservation
*caps_reservation
);
718 extern void __ceph_remove_cap(struct ceph_cap
*cap
);
719 static inline void ceph_remove_cap(struct ceph_cap
*cap
)
721 struct inode
*inode
= &cap
->ci
->vfs_inode
;
722 spin_lock(&inode
->i_lock
);
723 __ceph_remove_cap(cap
);
724 spin_unlock(&inode
->i_lock
);
726 extern void ceph_put_cap(struct ceph_mds_client
*mdsc
,
727 struct ceph_cap
*cap
);
729 extern void ceph_queue_caps_release(struct inode
*inode
);
730 extern int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
731 extern int ceph_fsync(struct file
*file
, int datasync
);
732 extern void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
733 struct ceph_mds_session
*session
);
734 extern struct ceph_cap
*ceph_get_cap_for_mds(struct ceph_inode_info
*ci
,
736 extern int ceph_get_cap_mds(struct inode
*inode
);
737 extern void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
);
738 extern void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
);
739 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
740 struct ceph_snap_context
*snapc
);
741 extern void __ceph_flush_snaps(struct ceph_inode_info
*ci
,
742 struct ceph_mds_session
**psession
,
744 extern void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
745 struct ceph_mds_session
*session
);
746 extern void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
);
747 extern void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
);
749 extern int ceph_encode_inode_release(void **p
, struct inode
*inode
,
750 int mds
, int drop
, int unless
, int force
);
751 extern int ceph_encode_dentry_release(void **p
, struct dentry
*dn
,
752 int mds
, int drop
, int unless
);
754 extern int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
755 int *got
, loff_t endoff
);
757 /* for counting open files by mode */
758 static inline void __ceph_get_fmode(struct ceph_inode_info
*ci
, int mode
)
760 ci
->i_nr_by_mode
[mode
]++;
762 extern void ceph_put_fmode(struct ceph_inode_info
*ci
, int mode
);
765 extern const struct address_space_operations ceph_aops
;
766 extern int ceph_mmap(struct file
*file
, struct vm_area_struct
*vma
);
769 extern const struct file_operations ceph_file_fops
;
770 extern const struct address_space_operations ceph_aops
;
771 extern int ceph_copy_to_page_vector(struct page
**pages
,
773 loff_t off
, size_t len
);
774 extern int ceph_copy_from_page_vector(struct page
**pages
,
776 loff_t off
, size_t len
);
777 extern struct page
**ceph_alloc_page_vector(int num_pages
, gfp_t flags
);
778 extern int ceph_open(struct inode
*inode
, struct file
*file
);
779 extern struct dentry
*ceph_lookup_open(struct inode
*dir
, struct dentry
*dentry
,
780 struct nameidata
*nd
, int mode
,
782 extern int ceph_release(struct inode
*inode
, struct file
*filp
);
785 extern const struct file_operations ceph_dir_fops
;
786 extern const struct inode_operations ceph_dir_iops
;
787 extern const struct dentry_operations ceph_dentry_ops
, ceph_snap_dentry_ops
,
788 ceph_snapdir_dentry_ops
;
790 extern int ceph_handle_notrace_create(struct inode
*dir
, struct dentry
*dentry
);
791 extern struct dentry
*ceph_finish_lookup(struct ceph_mds_request
*req
,
792 struct dentry
*dentry
, int err
);
794 extern void ceph_dentry_lru_add(struct dentry
*dn
);
795 extern void ceph_dentry_lru_touch(struct dentry
*dn
);
796 extern void ceph_dentry_lru_del(struct dentry
*dn
);
797 extern void ceph_invalidate_dentry_lease(struct dentry
*dentry
);
798 extern unsigned ceph_dentry_hash(struct dentry
*dn
);
801 * our d_ops vary depending on whether the inode is live,
802 * snapshotted (read-only), or a virtual ".snap" directory.
804 int ceph_init_dentry(struct dentry
*dentry
);
808 extern long ceph_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
811 extern const struct export_operations ceph_export_ops
;
814 extern int ceph_lock(struct file
*file
, int cmd
, struct file_lock
*fl
);
815 extern int ceph_flock(struct file
*file
, int cmd
, struct file_lock
*fl
);
816 extern void ceph_count_locks(struct inode
*inode
, int *p_num
, int *f_num
);
817 extern int ceph_encode_locks(struct inode
*i
, struct ceph_pagelist
*p
,
818 int p_locks
, int f_locks
);
819 extern int lock_to_ceph_filelock(struct file_lock
*fl
, struct ceph_filelock
*c
);
821 static inline struct inode
*get_dentry_parent_inode(struct dentry
*dentry
)
823 if (dentry
&& dentry
->d_parent
)
824 return dentry
->d_parent
->d_inode
;
830 extern int ceph_fs_debugfs_init(struct ceph_fs_client
*client
);
831 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client
*client
);
833 #endif /* _FS_CEPH_SUPER_H */