1 #ifndef _FS_CEPH_SUPER_H
2 #define _FS_CEPH_SUPER_H
4 #include "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/slab.h>
14 #include <linux/wait.h>
15 #include <linux/writeback.h>
16 #include <linux/slab.h>
19 #include "messenger.h"
21 #include "mon_client.h"
22 #include "mds_client.h"
23 #include "osd_client.h"
26 /* f_type in struct statfs */
27 #define CEPH_SUPER_MAGIC 0x00c36400
29 /* large granularity for statfs utilization stats to facilitate
30 * large volume sizes on 32-bit machines. */
31 #define CEPH_BLOCK_SHIFT 20 /* 1 MB */
32 #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
37 #define CEPH_OPT_FSID (1<<0)
38 #define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */
39 #define CEPH_OPT_MYIP (1<<2) /* specified my ip */
40 #define CEPH_OPT_DIRSTAT (1<<4) /* funky `cat dirname` for stats */
41 #define CEPH_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
42 #define CEPH_OPT_NOCRC (1<<6) /* no data crc on writes */
43 #define CEPH_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
45 #define CEPH_OPT_DEFAULT (CEPH_OPT_RBYTES)
47 #define ceph_set_opt(client, opt) \
48 (client)->mount_args->flags |= CEPH_OPT_##opt;
49 #define ceph_test_opt(client, opt) \
50 (!!((client)->mount_args->flags & CEPH_OPT_##opt))
53 struct ceph_mount_args
{
56 struct ceph_entity_addr
*mon_addr
;
60 int caps_wanted_delay_min
, caps_wanted_delay_max
;
61 struct ceph_fsid fsid
;
62 struct ceph_entity_addr my_addr
;
64 int rsize
; /* max readahead */
65 int max_readdir
; /* max readdir size */
66 int congestion_kb
; /* max readdir size */
68 int osd_keepalive_timeout
;
69 char *snapdir_name
; /* default ".snap" */
72 int cap_release_safety
;
78 #define CEPH_MOUNT_TIMEOUT_DEFAULT 60
79 #define CEPH_OSD_TIMEOUT_DEFAULT 60 /* seconds */
80 #define CEPH_OSD_KEEPALIVE_DEFAULT 5
81 #define CEPH_OSD_IDLE_TTL_DEFAULT 60
82 #define CEPH_MOUNT_RSIZE_DEFAULT (512*1024) /* readahead */
84 #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
85 #define CEPH_MSG_MAX_DATA_LEN (16*1024*1024)
87 #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
88 #define CEPH_AUTH_NAME_DEFAULT "guest"
91 * Delay telling the MDS we no longer want caps, in case we reopen
92 * the file. Delay a minimum amount of time, even if we send a cap
93 * message for some other reason. Otherwise, take the oppotunity to
94 * update the mds to avoid sending another message later.
96 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
97 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
104 CEPH_MOUNT_UNMOUNTING
,
105 CEPH_MOUNT_UNMOUNTED
,
112 static inline unsigned long time_sub(unsigned long a
, unsigned long b
)
114 BUG_ON(time_after(b
, a
));
115 return (long)a
- (long)b
;
119 * per-filesystem client state
121 * possibly shared by multiple mount points, if they are
122 * mounting the same ceph filesystem/cluster.
125 struct ceph_fsid fsid
;
128 struct mutex mount_mutex
; /* serialize mount attempts */
129 struct ceph_mount_args
*mount_args
;
131 struct super_block
*sb
;
133 unsigned long mount_state
;
134 wait_queue_head_t auth_wq
;
138 int min_caps
; /* min caps i added */
140 struct ceph_messenger
*msgr
; /* messenger instance */
141 struct ceph_mon_client monc
;
142 struct ceph_mds_client mdsc
;
143 struct ceph_osd_client osdc
;
146 mempool_t
*wb_pagevec_pool
;
147 struct workqueue_struct
*wb_wq
;
148 struct workqueue_struct
*pg_inv_wq
;
149 struct workqueue_struct
*trunc_wq
;
150 atomic_long_t writeback_count
;
152 struct backing_dev_info backing_dev_info
;
154 #ifdef CONFIG_DEBUG_FS
155 struct dentry
*debugfs_monmap
;
156 struct dentry
*debugfs_mdsmap
, *debugfs_osdmap
;
157 struct dentry
*debugfs_dir
, *debugfs_dentry_lru
, *debugfs_caps
;
158 struct dentry
*debugfs_congestion_kb
;
159 struct dentry
*debugfs_bdi
;
163 static inline struct ceph_client
*ceph_client(struct super_block
*sb
)
165 return sb
->s_fs_info
;
170 * File i/o capability. This tracks shared state with the metadata
171 * server that allows us to cache or writeback attributes or to read
172 * and write data. For any given inode, we should have one or more
173 * capabilities, one issued by each metadata server, and our
174 * cumulative access is the OR of all issued capabilities.
176 * Each cap is referenced by the inode's i_caps rbtree and by per-mds
177 * session capability lists.
180 struct ceph_inode_info
*ci
;
181 struct rb_node ci_node
; /* per-ci cap tree */
182 struct ceph_mds_session
*session
;
183 struct list_head session_caps
; /* per-session caplist */
185 u64 cap_id
; /* unique cap id (mds provided) */
186 int issued
; /* latest, from the mds */
187 int implemented
; /* implemented superset of issued (for revocation) */
189 u32 seq
, issue_seq
, mseq
;
190 u32 cap_gen
; /* active/stale cycle */
191 unsigned long last_used
;
192 struct list_head caps_item
;
195 #define CHECK_CAPS_NODELAY 1 /* do not delay any further */
196 #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
197 #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
200 * Snapped cap state that is pending flush to mds. When a snapshot occurs,
201 * we first complete any in-process sync writes and writeback any dirty
202 * data before flushing the snapped state (tracked here) back to the MDS.
204 struct ceph_cap_snap
{
206 struct ceph_inode_info
*ci
;
207 struct list_head ci_item
, flushing_item
;
209 u64 follows
, flush_tid
;
211 struct ceph_snap_context
*context
;
222 struct timespec mtime
, atime
, ctime
;
224 int writing
; /* a sync write is still in progress */
225 int dirty_pages
; /* dirty pages awaiting writeback */
228 static inline void ceph_put_cap_snap(struct ceph_cap_snap
*capsnap
)
230 if (atomic_dec_and_test(&capsnap
->nref
))
235 * The frag tree describes how a directory is fragmented, potentially across
236 * multiple metadata servers. It is also used to indicate points where
237 * metadata authority is delegated, and whether/where metadata is replicated.
239 * A _leaf_ frag will be present in the i_fragtree IFF there is
240 * delegation info. That is, if mds >= 0 || ndist > 0.
242 #define CEPH_MAX_DIRFRAG_REP 4
244 struct ceph_inode_frag
{
249 int split_by
; /* i.e. 2^(split_by) children */
251 /* delegation and replication info */
252 int mds
; /* -1 if same authority as parent */
253 int ndist
; /* >0 if replicated */
254 int dist
[CEPH_MAX_DIRFRAG_REP
];
258 * We cache inode xattrs as an encoded blob until they are first used,
259 * at which point we parse them into an rbtree.
261 struct ceph_inode_xattr
{
270 int should_free_name
;
274 struct ceph_inode_xattrs_info
{
276 * (still encoded) xattr blob. we avoid the overhead of parsing
277 * this until someone actually calls getxattr, etc.
279 * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
280 * NULL means we don't know.
282 struct ceph_buffer
*blob
, *prealloc_blob
;
284 struct rb_root index
;
289 u64 version
, index_version
;
295 #define CEPH_I_COMPLETE 1 /* we have complete directory cached */
296 #define CEPH_I_NODELAY 4 /* do not delay cap release */
297 #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
298 #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
300 struct ceph_inode_info
{
301 struct ceph_vino i_vino
; /* ceph ino + snap */
306 unsigned i_ceph_flags
;
307 unsigned long i_release_count
;
309 struct ceph_file_layout i_layout
;
313 struct timespec i_rctime
;
314 u64 i_rbytes
, i_rfiles
, i_rsubdirs
;
315 u64 i_files
, i_subdirs
;
316 u64 i_max_offset
; /* largest readdir offset, set with I_COMPLETE */
318 struct rb_root i_fragtree
;
319 struct mutex i_fragtree_mutex
;
321 struct ceph_inode_xattrs_info i_xattrs
;
323 /* capabilities. protected _both_ by i_lock and cap->session's
325 struct rb_root i_caps
; /* cap list */
326 struct ceph_cap
*i_auth_cap
; /* authoritative cap, if any */
327 unsigned i_dirty_caps
, i_flushing_caps
; /* mask of dirtied fields */
328 struct list_head i_dirty_item
, i_flushing_item
;
330 /* we need to track cap writeback on a per-cap-bit basis, to allow
331 * overlapping, pipelined cap flushes to the mds. we can probably
332 * reduce the tid to 8 bits if we're concerned about inode size. */
333 u16 i_cap_flush_last_tid
, i_cap_flush_tid
[CEPH_CAP_BITS
];
334 wait_queue_head_t i_cap_wq
; /* threads waiting on a capability */
335 unsigned long i_hold_caps_min
; /* jiffies */
336 unsigned long i_hold_caps_max
; /* jiffies */
337 struct list_head i_cap_delay_list
; /* for delayed cap release to mds */
338 int i_cap_exporting_mds
; /* to handle cap migration between */
339 unsigned i_cap_exporting_mseq
; /* mds's. */
340 unsigned i_cap_exporting_issued
;
341 struct ceph_cap_reservation i_cap_migration_resv
;
342 struct list_head i_cap_snaps
; /* snapped state pending flush to mds */
343 struct ceph_snap_context
*i_head_snapc
; /* set if wr_buffer_head > 0 */
344 unsigned i_snap_caps
; /* cap bits for snapped files */
346 int i_nr_by_mode
[CEPH_FILE_MODE_NUM
]; /* open file counts */
348 u32 i_truncate_seq
; /* last truncate to smaller size */
349 u64 i_truncate_size
; /* and the size we last truncated down to */
350 int i_truncate_pending
; /* still need to call vmtruncate */
352 u64 i_max_size
; /* max file size authorized by mds */
353 u64 i_reported_size
; /* (max_)size reported to or requested of mds */
354 u64 i_wanted_max_size
; /* offset we'd like to write too */
355 u64 i_requested_max_size
; /* max_size we've requested */
357 /* held references to caps */
359 int i_rd_ref
, i_rdcache_ref
, i_wr_ref
;
360 int i_wrbuffer_ref
, i_wrbuffer_ref_head
;
361 u32 i_shared_gen
; /* increment each time we get FILE_SHARED */
362 u32 i_rdcache_gen
; /* we increment this each time we get
363 FILE_CACHE. If it's non-zero, we
364 _may_ have cached pages. */
365 u32 i_rdcache_revoking
; /* RDCACHE gen to async invalidate, if any */
367 struct list_head i_unsafe_writes
; /* uncommitted sync writes */
368 struct list_head i_unsafe_dirops
; /* uncommitted mds dir ops */
369 spinlock_t i_unsafe_lock
;
371 struct ceph_snap_realm
*i_snap_realm
; /* snap realm (if caps) */
372 int i_snap_realm_counter
; /* snap realm (if caps) */
373 struct list_head i_snap_realm_item
;
374 struct list_head i_snap_flush_item
;
376 struct work_struct i_wb_work
; /* writeback work */
377 struct work_struct i_pg_inv_work
; /* page invalidation work */
379 struct work_struct i_vmtruncate_work
;
381 struct inode vfs_inode
; /* at end */
384 static inline struct ceph_inode_info
*ceph_inode(struct inode
*inode
)
386 return container_of(inode
, struct ceph_inode_info
, vfs_inode
);
389 static inline void ceph_i_clear(struct inode
*inode
, unsigned mask
)
391 struct ceph_inode_info
*ci
= ceph_inode(inode
);
393 spin_lock(&inode
->i_lock
);
394 ci
->i_ceph_flags
&= ~mask
;
395 spin_unlock(&inode
->i_lock
);
398 static inline void ceph_i_set(struct inode
*inode
, unsigned mask
)
400 struct ceph_inode_info
*ci
= ceph_inode(inode
);
402 spin_lock(&inode
->i_lock
);
403 ci
->i_ceph_flags
|= mask
;
404 spin_unlock(&inode
->i_lock
);
407 static inline bool ceph_i_test(struct inode
*inode
, unsigned mask
)
409 struct ceph_inode_info
*ci
= ceph_inode(inode
);
413 r
= (ci
->i_ceph_flags
& mask
) == mask
;
418 /* find a specific frag @f */
419 extern struct ceph_inode_frag
*__ceph_find_frag(struct ceph_inode_info
*ci
,
423 * choose fragment for value @v. copy frag content to pfrag, if leaf
426 extern u32
ceph_choose_frag(struct ceph_inode_info
*ci
, u32 v
,
427 struct ceph_inode_frag
*pfrag
,
433 struct ceph_dentry_info
{
434 struct ceph_mds_session
*lease_session
;
435 u32 lease_gen
, lease_shared_gen
;
437 unsigned long lease_renew_after
, lease_renew_from
;
438 struct list_head lru
;
439 struct dentry
*dentry
;
444 static inline struct ceph_dentry_info
*ceph_dentry(struct dentry
*dentry
)
446 return (struct ceph_dentry_info
*)dentry
->d_fsdata
;
449 static inline loff_t
ceph_make_fpos(unsigned frag
, unsigned off
)
451 return ((loff_t
)frag
<< 32) | (loff_t
)off
;
455 * ino_t is <64 bits on many architectures, blech.
457 * don't include snap in ino hash, at least for now.
459 static inline ino_t
ceph_vino_to_ino(struct ceph_vino vino
)
461 ino_t ino
= (ino_t
)vino
.ino
; /* ^ (vino.snap << 20); */
462 #if BITS_PER_LONG == 32
463 ino
^= vino
.ino
>> (sizeof(u64
)-sizeof(ino_t
)) * 8;
470 static inline int ceph_set_ino_cb(struct inode
*inode
, void *data
)
472 ceph_inode(inode
)->i_vino
= *(struct ceph_vino
*)data
;
473 inode
->i_ino
= ceph_vino_to_ino(*(struct ceph_vino
*)data
);
477 static inline struct ceph_vino
ceph_vino(struct inode
*inode
)
479 return ceph_inode(inode
)->i_vino
;
482 /* for printf-style formatting */
483 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
485 static inline u64
ceph_ino(struct inode
*inode
)
487 return ceph_inode(inode
)->i_vino
.ino
;
489 static inline u64
ceph_snap(struct inode
*inode
)
491 return ceph_inode(inode
)->i_vino
.snap
;
494 static inline int ceph_ino_compare(struct inode
*inode
, void *data
)
496 struct ceph_vino
*pvino
= (struct ceph_vino
*)data
;
497 struct ceph_inode_info
*ci
= ceph_inode(inode
);
498 return ci
->i_vino
.ino
== pvino
->ino
&&
499 ci
->i_vino
.snap
== pvino
->snap
;
502 static inline struct inode
*ceph_find_inode(struct super_block
*sb
,
503 struct ceph_vino vino
)
505 ino_t t
= ceph_vino_to_ino(vino
);
506 return ilookup5(sb
, t
, ceph_ino_compare
, &vino
);
513 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info
*ci
)
515 return !RB_EMPTY_ROOT(&ci
->i_caps
);
518 extern int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
);
519 extern int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int t
);
520 extern int __ceph_caps_issued_other(struct ceph_inode_info
*ci
,
521 struct ceph_cap
*cap
);
523 static inline int ceph_caps_issued(struct ceph_inode_info
*ci
)
526 spin_lock(&ci
->vfs_inode
.i_lock
);
527 issued
= __ceph_caps_issued(ci
, NULL
);
528 spin_unlock(&ci
->vfs_inode
.i_lock
);
532 static inline int ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
,
536 spin_lock(&ci
->vfs_inode
.i_lock
);
537 r
= __ceph_caps_issued_mask(ci
, mask
, touch
);
538 spin_unlock(&ci
->vfs_inode
.i_lock
);
542 static inline int __ceph_caps_dirty(struct ceph_inode_info
*ci
)
544 return ci
->i_dirty_caps
| ci
->i_flushing_caps
;
546 extern void __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
);
548 extern int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
);
549 extern int __ceph_caps_used(struct ceph_inode_info
*ci
);
551 extern int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
);
554 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
556 static inline int __ceph_caps_wanted(struct ceph_inode_info
*ci
)
558 int w
= __ceph_caps_file_wanted(ci
) | __ceph_caps_used(ci
);
559 if (w
& CEPH_CAP_FILE_BUFFER
)
560 w
|= CEPH_CAP_FILE_EXCL
; /* we want EXCL if dirty data */
564 /* what the mds thinks we want */
565 extern int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
);
567 extern void ceph_caps_init(void);
568 extern void ceph_caps_finalize(void);
569 extern void ceph_adjust_min_caps(int delta
);
570 extern int ceph_reserve_caps(struct ceph_cap_reservation
*ctx
, int need
);
571 extern int ceph_unreserve_caps(struct ceph_cap_reservation
*ctx
);
572 extern void ceph_reservation_status(struct ceph_client
*client
,
573 int *total
, int *avail
, int *used
,
574 int *reserved
, int *min
);
576 static inline struct ceph_client
*ceph_inode_to_client(struct inode
*inode
)
578 return (struct ceph_client
*)inode
->i_sb
->s_fs_info
;
581 static inline struct ceph_client
*ceph_sb_to_client(struct super_block
*sb
)
583 return (struct ceph_client
*)sb
->s_fs_info
;
588 * we keep buffered readdir results attached to file->private_data
590 struct ceph_file_info
{
591 int fmode
; /* initialized on open */
593 /* readdir: position within the dir */
595 struct ceph_mds_request
*last_readdir
;
598 /* readdir: position within a frag */
599 unsigned offset
; /* offset of last chunk, adjusted for . and .. */
600 u64 next_offset
; /* offset of next chunk (last_name's + 1) */
601 char *last_name
; /* last entry in previous chunk */
602 struct dentry
*dentry
; /* next dentry (for dcache readdir) */
603 unsigned long dir_release_count
;
605 /* used for -o dirstat read() on directory thing */
617 * A "snap context" is the set of existing snapshots when we
618 * write data. It is used by the OSD to guide its COW behavior.
620 * The ceph_snap_context is refcounted, and attached to each dirty
621 * page, indicating which context the dirty data belonged when it was
624 struct ceph_snap_context
{
631 static inline struct ceph_snap_context
*
632 ceph_get_snap_context(struct ceph_snap_context
*sc
)
635 printk("get_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
636 atomic_read(&sc->nref)+1);
639 atomic_inc(&sc
->nref
);
643 static inline void ceph_put_snap_context(struct ceph_snap_context
*sc
)
648 printk("put_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
649 atomic_read(&sc->nref)-1);
651 if (atomic_dec_and_test(&sc
->nref
)) {
652 /*printk(" deleting snap_context %p\n", sc);*/
658 * A "snap realm" describes a subset of the file hierarchy sharing
659 * the same set of snapshots that apply to it. The realms themselves
660 * are organized into a hierarchy, such that children inherit (some of)
661 * the snapshots of their parents.
663 * All inodes within the realm that have capabilities are linked into a
666 struct ceph_snap_realm
{
673 u64 parent_since
; /* snapid when our current parent became so */
675 u64
*prior_parent_snaps
; /* snaps inherited from any parents we */
676 int num_prior_parent_snaps
; /* had prior to parent_since */
677 u64
*snaps
; /* snaps specific to this realm */
680 struct ceph_snap_realm
*parent
;
681 struct list_head children
; /* list of child realms */
682 struct list_head child_item
;
684 struct list_head empty_item
; /* if i have ref==0 */
686 /* the current set of snaps for this realm */
687 struct ceph_snap_context
*cached_context
;
689 struct list_head inodes_with_caps
;
690 spinlock_t inodes_with_caps_lock
;
696 * calculate the number of pages a given length and offset map onto,
697 * if we align the data.
699 static inline int calc_pages_for(u64 off
, u64 len
)
701 return ((off
+len
+PAGE_CACHE_SIZE
-1) >> PAGE_CACHE_SHIFT
) -
702 (off
>> PAGE_CACHE_SHIFT
);
708 struct ceph_snap_realm
*ceph_lookup_snap_realm(struct ceph_mds_client
*mdsc
,
710 extern void ceph_get_snap_realm(struct ceph_mds_client
*mdsc
,
711 struct ceph_snap_realm
*realm
);
712 extern void ceph_put_snap_realm(struct ceph_mds_client
*mdsc
,
713 struct ceph_snap_realm
*realm
);
714 extern int ceph_update_snap_trace(struct ceph_mds_client
*m
,
715 void *p
, void *e
, bool deletion
);
716 extern void ceph_handle_snap(struct ceph_mds_client
*mdsc
,
717 struct ceph_mds_session
*session
,
718 struct ceph_msg
*msg
);
719 extern void ceph_queue_cap_snap(struct ceph_inode_info
*ci
);
720 extern int __ceph_finish_cap_snap(struct ceph_inode_info
*ci
,
721 struct ceph_cap_snap
*capsnap
);
722 extern void ceph_cleanup_empty_realms(struct ceph_mds_client
*mdsc
);
725 * a cap_snap is "pending" if it is still awaiting an in-progress
726 * sync write (that may/may not still update size, mtime, etc.).
728 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info
*ci
)
730 return !list_empty(&ci
->i_cap_snaps
) &&
731 list_entry(ci
->i_cap_snaps
.prev
, struct ceph_cap_snap
,
737 extern struct kmem_cache
*ceph_inode_cachep
;
738 extern struct kmem_cache
*ceph_cap_cachep
;
739 extern struct kmem_cache
*ceph_dentry_cachep
;
740 extern struct kmem_cache
*ceph_file_cachep
;
742 extern const char *ceph_msg_type_name(int type
);
743 extern int ceph_check_fsid(struct ceph_client
*client
, struct ceph_fsid
*fsid
);
745 #define FSID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
746 "%02x%02x%02x%02x%02x%02x"
747 #define PR_FSID(f) (f)->fsid[0], (f)->fsid[1], (f)->fsid[2], (f)->fsid[3], \
748 (f)->fsid[4], (f)->fsid[5], (f)->fsid[6], (f)->fsid[7], \
749 (f)->fsid[8], (f)->fsid[9], (f)->fsid[10], (f)->fsid[11], \
750 (f)->fsid[12], (f)->fsid[13], (f)->fsid[14], (f)->fsid[15]
753 extern const struct inode_operations ceph_file_iops
;
755 extern struct inode
*ceph_alloc_inode(struct super_block
*sb
);
756 extern void ceph_destroy_inode(struct inode
*inode
);
758 extern struct inode
*ceph_get_inode(struct super_block
*sb
,
759 struct ceph_vino vino
);
760 extern struct inode
*ceph_get_snapdir(struct inode
*parent
);
761 extern int ceph_fill_file_size(struct inode
*inode
, int issued
,
762 u32 truncate_seq
, u64 truncate_size
, u64 size
);
763 extern void ceph_fill_file_time(struct inode
*inode
, int issued
,
764 u64 time_warp_seq
, struct timespec
*ctime
,
765 struct timespec
*mtime
, struct timespec
*atime
);
766 extern int ceph_fill_trace(struct super_block
*sb
,
767 struct ceph_mds_request
*req
,
768 struct ceph_mds_session
*session
);
769 extern int ceph_readdir_prepopulate(struct ceph_mds_request
*req
,
770 struct ceph_mds_session
*session
);
772 extern int ceph_inode_holds_cap(struct inode
*inode
, int mask
);
774 extern int ceph_inode_set_size(struct inode
*inode
, loff_t size
);
775 extern void __ceph_do_pending_vmtruncate(struct inode
*inode
);
776 extern void ceph_queue_vmtruncate(struct inode
*inode
);
778 extern void ceph_queue_invalidate(struct inode
*inode
);
779 extern void ceph_queue_writeback(struct inode
*inode
);
781 extern int ceph_do_getattr(struct inode
*inode
, int mask
);
782 extern int ceph_permission(struct inode
*inode
, int mask
);
783 extern int ceph_setattr(struct dentry
*dentry
, struct iattr
*attr
);
784 extern int ceph_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
,
788 extern int ceph_setxattr(struct dentry
*, const char *, const void *,
790 extern ssize_t
ceph_getxattr(struct dentry
*, const char *, void *, size_t);
791 extern ssize_t
ceph_listxattr(struct dentry
*, char *, size_t);
792 extern int ceph_removexattr(struct dentry
*, const char *);
793 extern void __ceph_build_xattrs_blob(struct ceph_inode_info
*ci
);
794 extern void __ceph_destroy_xattrs(struct ceph_inode_info
*ci
);
797 extern const char *ceph_cap_string(int c
);
798 extern void ceph_handle_caps(struct ceph_mds_session
*session
,
799 struct ceph_msg
*msg
);
800 extern int ceph_add_cap(struct inode
*inode
,
801 struct ceph_mds_session
*session
, u64 cap_id
,
802 int fmode
, unsigned issued
, unsigned wanted
,
803 unsigned cap
, unsigned seq
, u64 realmino
, int flags
,
804 struct ceph_cap_reservation
*caps_reservation
);
805 extern void __ceph_remove_cap(struct ceph_cap
*cap
);
806 static inline void ceph_remove_cap(struct ceph_cap
*cap
)
808 struct inode
*inode
= &cap
->ci
->vfs_inode
;
809 spin_lock(&inode
->i_lock
);
810 __ceph_remove_cap(cap
);
811 spin_unlock(&inode
->i_lock
);
813 extern void ceph_put_cap(struct ceph_cap
*cap
);
815 extern void ceph_queue_caps_release(struct inode
*inode
);
816 extern int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
817 extern int ceph_fsync(struct file
*file
, struct dentry
*dentry
, int datasync
);
818 extern void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
819 struct ceph_mds_session
*session
);
820 extern int ceph_get_cap_mds(struct inode
*inode
);
821 extern void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
);
822 extern void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
);
823 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
824 struct ceph_snap_context
*snapc
);
825 extern void __ceph_flush_snaps(struct ceph_inode_info
*ci
,
826 struct ceph_mds_session
**psession
);
827 extern void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
828 struct ceph_mds_session
*session
);
829 extern void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
);
830 extern void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
);
832 extern int ceph_encode_inode_release(void **p
, struct inode
*inode
,
833 int mds
, int drop
, int unless
, int force
);
834 extern int ceph_encode_dentry_release(void **p
, struct dentry
*dn
,
835 int mds
, int drop
, int unless
);
837 extern int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
838 int *got
, loff_t endoff
);
840 /* for counting open files by mode */
841 static inline void __ceph_get_fmode(struct ceph_inode_info
*ci
, int mode
)
843 ci
->i_nr_by_mode
[mode
]++;
845 extern void ceph_put_fmode(struct ceph_inode_info
*ci
, int mode
);
848 extern const struct address_space_operations ceph_aops
;
849 extern int ceph_mmap(struct file
*file
, struct vm_area_struct
*vma
);
852 extern const struct file_operations ceph_file_fops
;
853 extern const struct address_space_operations ceph_aops
;
854 extern int ceph_open(struct inode
*inode
, struct file
*file
);
855 extern struct dentry
*ceph_lookup_open(struct inode
*dir
, struct dentry
*dentry
,
856 struct nameidata
*nd
, int mode
,
858 extern int ceph_release(struct inode
*inode
, struct file
*filp
);
859 extern void ceph_release_page_vector(struct page
**pages
, int num_pages
);
862 extern const struct file_operations ceph_dir_fops
;
863 extern const struct inode_operations ceph_dir_iops
;
864 extern struct dentry_operations ceph_dentry_ops
, ceph_snap_dentry_ops
,
865 ceph_snapdir_dentry_ops
;
867 extern int ceph_handle_notrace_create(struct inode
*dir
, struct dentry
*dentry
);
868 extern struct dentry
*ceph_finish_lookup(struct ceph_mds_request
*req
,
869 struct dentry
*dentry
, int err
);
871 extern void ceph_dentry_lru_add(struct dentry
*dn
);
872 extern void ceph_dentry_lru_touch(struct dentry
*dn
);
873 extern void ceph_dentry_lru_del(struct dentry
*dn
);
876 * our d_ops vary depending on whether the inode is live,
877 * snapshotted (read-only), or a virtual ".snap" directory.
879 int ceph_init_dentry(struct dentry
*dentry
);
883 extern long ceph_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
886 extern const struct export_operations ceph_export_ops
;
889 extern int ceph_debugfs_init(void);
890 extern void ceph_debugfs_cleanup(void);
891 extern int ceph_debugfs_client_init(struct ceph_client
*client
);
892 extern void ceph_debugfs_client_cleanup(struct ceph_client
*client
);
894 static inline struct inode
*get_dentry_parent_inode(struct dentry
*dentry
)
896 if (dentry
&& dentry
->d_parent
)
897 return dentry
->d_parent
->d_inode
;
902 #endif /* _FS_CEPH_SUPER_H */