1 #include "ceph_debug.h"
4 #include <linux/kernel.h>
5 #include <linux/sched.h>
6 #include <linux/vmalloc.h>
7 #include <linux/wait.h>
11 #include "messenger.h"
14 * Capability management
16 * The Ceph metadata servers control client access to inode metadata
17 * and file data by issuing capabilities, granting clients permission
18 * to read and/or write both inode field and file data to OSDs
19 * (storage nodes). Each capability consists of a set of bits
20 * indicating which operations are allowed.
22 * If the client holds a *_SHARED cap, the client has a coherent value
23 * that can be safely read from the cached inode.
25 * In the case of a *_EXCL (exclusive) or FILE_WR capabilities, the
26 * client is allowed to change inode attributes (e.g., file size,
27 * mtime), note its dirty state in the ceph_cap, and asynchronously
28 * flush that metadata change to the MDS.
30 * In the event of a conflicting operation (perhaps by another
31 * client), the MDS will revoke the conflicting client capabilities.
33 * In order for a client to cache an inode, it must hold a capability
34 * with at least one MDS server. When inodes are released, release
35 * notifications are batched and periodically sent en masse to the MDS
36 * cluster to release server state.
41 * Generate readable cap strings for debugging output.
43 #define MAX_CAP_STR 20
44 static char cap_str
[MAX_CAP_STR
][40];
45 static DEFINE_SPINLOCK(cap_str_lock
);
46 static int last_cap_str
;
48 static char *gcap_string(char *s
, int c
)
50 if (c
& CEPH_CAP_GSHARED
)
52 if (c
& CEPH_CAP_GEXCL
)
54 if (c
& CEPH_CAP_GCACHE
)
60 if (c
& CEPH_CAP_GBUFFER
)
62 if (c
& CEPH_CAP_GLAZYIO
)
67 const char *ceph_cap_string(int caps
)
73 spin_lock(&cap_str_lock
);
75 if (last_cap_str
== MAX_CAP_STR
)
77 spin_unlock(&cap_str_lock
);
81 if (caps
& CEPH_CAP_PIN
)
84 c
= (caps
>> CEPH_CAP_SAUTH
) & 3;
87 s
= gcap_string(s
, c
);
90 c
= (caps
>> CEPH_CAP_SLINK
) & 3;
93 s
= gcap_string(s
, c
);
96 c
= (caps
>> CEPH_CAP_SXATTR
) & 3;
99 s
= gcap_string(s
, c
);
102 c
= caps
>> CEPH_CAP_SFILE
;
105 s
= gcap_string(s
, c
);
117 * Maintain a global pool of preallocated struct ceph_caps, referenced
118 * by struct ceph_caps_reservations. This ensures that we preallocate
119 * memory needed to successfully process an MDS response. (If an MDS
120 * sends us cap information and we fail to process it, we will have
121 * problems due to the client and MDS being out of sync.)
123 * Reservations are 'owned' by a ceph_cap_reservation context.
125 static spinlock_t caps_list_lock
;
126 static struct list_head caps_list
; /* unused (reserved or unreserved) */
127 static int caps_total_count
; /* total caps allocated */
128 static int caps_use_count
; /* in use */
129 static int caps_reserve_count
; /* unused, reserved */
130 static int caps_avail_count
; /* unused, unreserved */
132 void __init
ceph_caps_init(void)
134 INIT_LIST_HEAD(&caps_list
);
135 spin_lock_init(&caps_list_lock
);
138 void ceph_caps_finalize(void)
140 struct ceph_cap
*cap
;
142 spin_lock(&caps_list_lock
);
143 while (!list_empty(&caps_list
)) {
144 cap
= list_first_entry(&caps_list
, struct ceph_cap
, caps_item
);
145 list_del(&cap
->caps_item
);
146 kmem_cache_free(ceph_cap_cachep
, cap
);
148 caps_total_count
= 0;
149 caps_avail_count
= 0;
151 caps_reserve_count
= 0;
152 spin_unlock(&caps_list_lock
);
155 int ceph_reserve_caps(struct ceph_cap_reservation
*ctx
, int need
)
158 struct ceph_cap
*cap
;
164 dout("reserve caps ctx=%p need=%d\n", ctx
, need
);
166 /* first reserve any caps that are already allocated */
167 spin_lock(&caps_list_lock
);
168 if (caps_avail_count
>= need
)
171 have
= caps_avail_count
;
172 caps_avail_count
-= have
;
173 caps_reserve_count
+= have
;
174 BUG_ON(caps_total_count
!= caps_use_count
+ caps_reserve_count
+
176 spin_unlock(&caps_list_lock
);
178 for (i
= have
; i
< need
; i
++) {
179 cap
= kmem_cache_alloc(ceph_cap_cachep
, GFP_NOFS
);
182 goto out_alloc_count
;
184 list_add(&cap
->caps_item
, &newcaps
);
187 BUG_ON(have
+ alloc
!= need
);
189 spin_lock(&caps_list_lock
);
190 caps_total_count
+= alloc
;
191 caps_reserve_count
+= alloc
;
192 list_splice(&newcaps
, &caps_list
);
194 BUG_ON(caps_total_count
!= caps_use_count
+ caps_reserve_count
+
196 spin_unlock(&caps_list_lock
);
199 dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n",
200 ctx
, caps_total_count
, caps_use_count
, caps_reserve_count
,
205 /* we didn't manage to reserve as much as we needed */
206 pr_warning("reserve caps ctx=%p ENOMEM need=%d got=%d\n",
211 int ceph_unreserve_caps(struct ceph_cap_reservation
*ctx
)
213 dout("unreserve caps ctx=%p count=%d\n", ctx
, ctx
->count
);
215 spin_lock(&caps_list_lock
);
216 BUG_ON(caps_reserve_count
< ctx
->count
);
217 caps_reserve_count
-= ctx
->count
;
218 caps_avail_count
+= ctx
->count
;
220 dout("unreserve caps %d = %d used + %d resv + %d avail\n",
221 caps_total_count
, caps_use_count
, caps_reserve_count
,
223 BUG_ON(caps_total_count
!= caps_use_count
+ caps_reserve_count
+
225 spin_unlock(&caps_list_lock
);
230 static struct ceph_cap
*get_cap(struct ceph_cap_reservation
*ctx
)
232 struct ceph_cap
*cap
= NULL
;
234 /* temporary, until we do something about cap import/export */
236 return kmem_cache_alloc(ceph_cap_cachep
, GFP_NOFS
);
238 spin_lock(&caps_list_lock
);
239 dout("get_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n",
240 ctx
, ctx
->count
, caps_total_count
, caps_use_count
,
241 caps_reserve_count
, caps_avail_count
);
243 BUG_ON(ctx
->count
> caps_reserve_count
);
244 BUG_ON(list_empty(&caps_list
));
247 caps_reserve_count
--;
250 cap
= list_first_entry(&caps_list
, struct ceph_cap
, caps_item
);
251 list_del(&cap
->caps_item
);
253 BUG_ON(caps_total_count
!= caps_use_count
+ caps_reserve_count
+
255 spin_unlock(&caps_list_lock
);
259 static void put_cap(struct ceph_cap
*cap
,
260 struct ceph_cap_reservation
*ctx
)
262 spin_lock(&caps_list_lock
);
263 dout("put_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n",
264 ctx
, ctx
? ctx
->count
: 0, caps_total_count
, caps_use_count
,
265 caps_reserve_count
, caps_avail_count
);
268 * Keep some preallocated caps around, at least enough to do a
269 * readdir (which needs to preallocate lots of them), to avoid
270 * lots of free/alloc churn.
272 if (caps_avail_count
>= caps_reserve_count
+
273 ceph_client(cap
->ci
->vfs_inode
.i_sb
)->mount_args
->max_readdir
) {
275 kmem_cache_free(ceph_cap_cachep
, cap
);
279 caps_reserve_count
++;
283 list_add(&cap
->caps_item
, &caps_list
);
286 BUG_ON(caps_total_count
!= caps_use_count
+ caps_reserve_count
+
288 spin_unlock(&caps_list_lock
);
291 void ceph_reservation_status(struct ceph_client
*client
,
292 int *total
, int *avail
, int *used
, int *reserved
)
295 *total
= caps_total_count
;
297 *avail
= caps_avail_count
;
299 *used
= caps_use_count
;
301 *reserved
= caps_reserve_count
;
305 * Find ceph_cap for given mds, if any.
307 * Called with i_lock held.
309 static struct ceph_cap
*__get_cap_for_mds(struct ceph_inode_info
*ci
, int mds
)
311 struct ceph_cap
*cap
;
312 struct rb_node
*n
= ci
->i_caps
.rb_node
;
315 cap
= rb_entry(n
, struct ceph_cap
, ci_node
);
318 else if (mds
> cap
->mds
)
327 * Return id of any MDS with a cap, preferably FILE_WR|WRBUFFER|EXCL, else
330 static int __ceph_get_cap_mds(struct ceph_inode_info
*ci
, u32
*mseq
)
332 struct ceph_cap
*cap
;
336 /* prefer mds with WR|WRBUFFER|EXCL caps */
337 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
338 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
342 if (cap
->issued
& (CEPH_CAP_FILE_WR
|
343 CEPH_CAP_FILE_BUFFER
|
350 int ceph_get_cap_mds(struct inode
*inode
)
353 spin_lock(&inode
->i_lock
);
354 mds
= __ceph_get_cap_mds(ceph_inode(inode
), NULL
);
355 spin_unlock(&inode
->i_lock
);
360 * Called under i_lock.
362 static void __insert_cap_node(struct ceph_inode_info
*ci
,
363 struct ceph_cap
*new)
365 struct rb_node
**p
= &ci
->i_caps
.rb_node
;
366 struct rb_node
*parent
= NULL
;
367 struct ceph_cap
*cap
= NULL
;
371 cap
= rb_entry(parent
, struct ceph_cap
, ci_node
);
372 if (new->mds
< cap
->mds
)
374 else if (new->mds
> cap
->mds
)
380 rb_link_node(&new->ci_node
, parent
, p
);
381 rb_insert_color(&new->ci_node
, &ci
->i_caps
);
385 * (re)set cap hold timeouts, which control the delayed release
386 * of unused caps back to the MDS. Should be called on cap use.
388 static void __cap_set_timeouts(struct ceph_mds_client
*mdsc
,
389 struct ceph_inode_info
*ci
)
391 struct ceph_mount_args
*ma
= mdsc
->client
->mount_args
;
393 ci
->i_hold_caps_min
= round_jiffies(jiffies
+
394 ma
->caps_wanted_delay_min
* HZ
);
395 ci
->i_hold_caps_max
= round_jiffies(jiffies
+
396 ma
->caps_wanted_delay_max
* HZ
);
397 dout("__cap_set_timeouts %p min %lu max %lu\n", &ci
->vfs_inode
,
398 ci
->i_hold_caps_min
- jiffies
, ci
->i_hold_caps_max
- jiffies
);
402 * (Re)queue cap at the end of the delayed cap release list.
404 * If I_FLUSH is set, leave the inode at the front of the list.
406 * Caller holds i_lock
407 * -> we take mdsc->cap_delay_lock
409 static void __cap_delay_requeue(struct ceph_mds_client
*mdsc
,
410 struct ceph_inode_info
*ci
)
412 __cap_set_timeouts(mdsc
, ci
);
413 dout("__cap_delay_requeue %p flags %d at %lu\n", &ci
->vfs_inode
,
414 ci
->i_ceph_flags
, ci
->i_hold_caps_max
);
415 if (!mdsc
->stopping
) {
416 spin_lock(&mdsc
->cap_delay_lock
);
417 if (!list_empty(&ci
->i_cap_delay_list
)) {
418 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
420 list_del_init(&ci
->i_cap_delay_list
);
422 list_add_tail(&ci
->i_cap_delay_list
, &mdsc
->cap_delay_list
);
424 spin_unlock(&mdsc
->cap_delay_lock
);
429 * Queue an inode for immediate writeback. Mark inode with I_FLUSH,
430 * indicating we should send a cap message to flush dirty metadata
431 * asap, and move to the front of the delayed cap list.
433 static void __cap_delay_requeue_front(struct ceph_mds_client
*mdsc
,
434 struct ceph_inode_info
*ci
)
436 dout("__cap_delay_requeue_front %p\n", &ci
->vfs_inode
);
437 spin_lock(&mdsc
->cap_delay_lock
);
438 ci
->i_ceph_flags
|= CEPH_I_FLUSH
;
439 if (!list_empty(&ci
->i_cap_delay_list
))
440 list_del_init(&ci
->i_cap_delay_list
);
441 list_add(&ci
->i_cap_delay_list
, &mdsc
->cap_delay_list
);
442 spin_unlock(&mdsc
->cap_delay_lock
);
446 * Cancel delayed work on cap.
448 * Caller must hold i_lock.
450 static void __cap_delay_cancel(struct ceph_mds_client
*mdsc
,
451 struct ceph_inode_info
*ci
)
453 dout("__cap_delay_cancel %p\n", &ci
->vfs_inode
);
454 if (list_empty(&ci
->i_cap_delay_list
))
456 spin_lock(&mdsc
->cap_delay_lock
);
457 list_del_init(&ci
->i_cap_delay_list
);
458 spin_unlock(&mdsc
->cap_delay_lock
);
462 * Common issue checks for add_cap, handle_cap_grant.
464 static void __check_cap_issue(struct ceph_inode_info
*ci
, struct ceph_cap
*cap
,
467 unsigned had
= __ceph_caps_issued(ci
, NULL
);
470 * Each time we receive FILE_CACHE anew, we increment
473 if ((issued
& CEPH_CAP_FILE_CACHE
) &&
474 (had
& CEPH_CAP_FILE_CACHE
) == 0)
478 * if we are newly issued FILE_SHARED, clear I_COMPLETE; we
479 * don't know what happened to this directory while we didn't
482 if ((issued
& CEPH_CAP_FILE_SHARED
) &&
483 (had
& CEPH_CAP_FILE_SHARED
) == 0) {
485 if (S_ISDIR(ci
->vfs_inode
.i_mode
)) {
486 dout(" marking %p NOT complete\n", &ci
->vfs_inode
);
487 ci
->i_ceph_flags
&= ~CEPH_I_COMPLETE
;
493 * Add a capability under the given MDS session.
495 * Caller should hold session snap_rwsem (read) and s_mutex.
497 * @fmode is the open file mode, if we are opening a file, otherwise
498 * it is < 0. (This is so we can atomically add the cap and add an
499 * open file reference to it.)
501 int ceph_add_cap(struct inode
*inode
,
502 struct ceph_mds_session
*session
, u64 cap_id
,
503 int fmode
, unsigned issued
, unsigned wanted
,
504 unsigned seq
, unsigned mseq
, u64 realmino
, int flags
,
505 struct ceph_cap_reservation
*caps_reservation
)
507 struct ceph_mds_client
*mdsc
= &ceph_inode_to_client(inode
)->mdsc
;
508 struct ceph_inode_info
*ci
= ceph_inode(inode
);
509 struct ceph_cap
*new_cap
= NULL
;
510 struct ceph_cap
*cap
;
511 int mds
= session
->s_mds
;
514 dout("add_cap %p mds%d cap %llx %s seq %d\n", inode
,
515 session
->s_mds
, cap_id
, ceph_cap_string(issued
), seq
);
518 * If we are opening the file, include file mode wanted bits
522 wanted
|= ceph_caps_for_mode(fmode
);
525 spin_lock(&inode
->i_lock
);
526 cap
= __get_cap_for_mds(ci
, mds
);
532 spin_unlock(&inode
->i_lock
);
533 new_cap
= get_cap(caps_reservation
);
540 cap
->implemented
= 0;
545 __insert_cap_node(ci
, cap
);
547 /* clear out old exporting info? (i.e. on cap import) */
548 if (ci
->i_cap_exporting_mds
== mds
) {
549 ci
->i_cap_exporting_issued
= 0;
550 ci
->i_cap_exporting_mseq
= 0;
551 ci
->i_cap_exporting_mds
= -1;
554 /* add to session cap list */
555 cap
->session
= session
;
556 spin_lock(&session
->s_cap_lock
);
557 list_add_tail(&cap
->session_caps
, &session
->s_caps
);
558 session
->s_nr_caps
++;
559 spin_unlock(&session
->s_cap_lock
);
562 if (!ci
->i_snap_realm
) {
564 * add this inode to the appropriate snap realm
566 struct ceph_snap_realm
*realm
= ceph_lookup_snap_realm(mdsc
,
569 ceph_get_snap_realm(mdsc
, realm
);
570 spin_lock(&realm
->inodes_with_caps_lock
);
571 ci
->i_snap_realm
= realm
;
572 list_add(&ci
->i_snap_realm_item
,
573 &realm
->inodes_with_caps
);
574 spin_unlock(&realm
->inodes_with_caps_lock
);
576 pr_err("ceph_add_cap: couldn't find snap realm %llx\n",
581 __check_cap_issue(ci
, cap
, issued
);
584 * If we are issued caps we don't want, or the mds' wanted
585 * value appears to be off, queue a check so we'll release
586 * later and/or update the mds wanted value.
588 actual_wanted
= __ceph_caps_wanted(ci
);
589 if ((wanted
& ~actual_wanted
) ||
590 (issued
& ~actual_wanted
& CEPH_CAP_ANY_WR
)) {
591 dout(" issued %s, mds wanted %s, actual %s, queueing\n",
592 ceph_cap_string(issued
), ceph_cap_string(wanted
),
593 ceph_cap_string(actual_wanted
));
594 __cap_delay_requeue(mdsc
, ci
);
597 if (flags
& CEPH_CAP_FLAG_AUTH
)
598 ci
->i_auth_cap
= cap
;
599 else if (ci
->i_auth_cap
== cap
)
600 ci
->i_auth_cap
= NULL
;
602 dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n",
603 inode
, ceph_vinop(inode
), cap
, ceph_cap_string(issued
),
604 ceph_cap_string(issued
|cap
->issued
), seq
, mds
);
605 cap
->cap_id
= cap_id
;
606 cap
->issued
= issued
;
607 cap
->implemented
|= issued
;
608 cap
->mds_wanted
|= wanted
;
610 cap
->issue_seq
= seq
;
612 cap
->cap_gen
= session
->s_cap_gen
;
615 __ceph_get_fmode(ci
, fmode
);
616 spin_unlock(&inode
->i_lock
);
617 wake_up(&ci
->i_cap_wq
);
622 * Return true if cap has not timed out and belongs to the current
623 * generation of the MDS session (i.e. has not gone 'stale' due to
624 * us losing touch with the mds).
626 static int __cap_is_valid(struct ceph_cap
*cap
)
631 spin_lock(&cap
->session
->s_cap_lock
);
632 gen
= cap
->session
->s_cap_gen
;
633 ttl
= cap
->session
->s_cap_ttl
;
634 spin_unlock(&cap
->session
->s_cap_lock
);
636 if (cap
->cap_gen
< gen
|| time_after_eq(jiffies
, ttl
)) {
637 dout("__cap_is_valid %p cap %p issued %s "
638 "but STALE (gen %u vs %u)\n", &cap
->ci
->vfs_inode
,
639 cap
, ceph_cap_string(cap
->issued
), cap
->cap_gen
, gen
);
647 * Return set of valid cap bits issued to us. Note that caps time
648 * out, and may be invalidated in bulk if the client session times out
649 * and session->s_cap_gen is bumped.
651 int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
)
653 int have
= ci
->i_snap_caps
;
654 struct ceph_cap
*cap
;
659 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
660 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
661 if (!__cap_is_valid(cap
))
663 dout("__ceph_caps_issued %p cap %p issued %s\n",
664 &ci
->vfs_inode
, cap
, ceph_cap_string(cap
->issued
));
667 *implemented
|= cap
->implemented
;
673 * Get cap bits issued by caps other than @ocap
675 int __ceph_caps_issued_other(struct ceph_inode_info
*ci
, struct ceph_cap
*ocap
)
677 int have
= ci
->i_snap_caps
;
678 struct ceph_cap
*cap
;
681 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
682 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
685 if (!__cap_is_valid(cap
))
693 * Move a cap to the end of the LRU (oldest caps at list head, newest
696 static void __touch_cap(struct ceph_cap
*cap
)
698 struct ceph_mds_session
*s
= cap
->session
;
700 dout("__touch_cap %p cap %p mds%d\n", &cap
->ci
->vfs_inode
, cap
,
702 spin_lock(&s
->s_cap_lock
);
703 list_move_tail(&cap
->session_caps
, &s
->s_caps
);
704 spin_unlock(&s
->s_cap_lock
);
708 * Check if we hold the given mask. If so, move the cap(s) to the
709 * front of their respective LRUs. (This is the preferred way for
710 * callers to check for caps they want.)
712 int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int touch
)
714 struct ceph_cap
*cap
;
716 int have
= ci
->i_snap_caps
;
718 if ((have
& mask
) == mask
) {
719 dout("__ceph_caps_issued_mask %p snap issued %s"
720 " (mask %s)\n", &ci
->vfs_inode
,
721 ceph_cap_string(have
),
722 ceph_cap_string(mask
));
726 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
727 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
728 if (!__cap_is_valid(cap
))
730 if ((cap
->issued
& mask
) == mask
) {
731 dout("__ceph_caps_issued_mask %p cap %p issued %s"
732 " (mask %s)\n", &ci
->vfs_inode
, cap
,
733 ceph_cap_string(cap
->issued
),
734 ceph_cap_string(mask
));
740 /* does a combination of caps satisfy mask? */
742 if ((have
& mask
) == mask
) {
743 dout("__ceph_caps_issued_mask %p combo issued %s"
744 " (mask %s)\n", &ci
->vfs_inode
,
745 ceph_cap_string(cap
->issued
),
746 ceph_cap_string(mask
));
750 /* touch this + preceeding caps */
752 for (q
= rb_first(&ci
->i_caps
); q
!= p
;
754 cap
= rb_entry(q
, struct ceph_cap
,
756 if (!__cap_is_valid(cap
))
769 * Return true if mask caps are currently being revoked by an MDS.
771 int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
)
773 struct inode
*inode
= &ci
->vfs_inode
;
774 struct ceph_cap
*cap
;
778 spin_lock(&inode
->i_lock
);
779 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
780 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
781 if (__cap_is_valid(cap
) &&
782 (cap
->implemented
& ~cap
->issued
& mask
)) {
787 spin_unlock(&inode
->i_lock
);
788 dout("ceph_caps_revoking %p %s = %d\n", inode
,
789 ceph_cap_string(mask
), ret
);
793 int __ceph_caps_used(struct ceph_inode_info
*ci
)
797 used
|= CEPH_CAP_PIN
;
799 used
|= CEPH_CAP_FILE_RD
;
800 if (ci
->i_rdcache_ref
|| ci
->i_rdcache_gen
)
801 used
|= CEPH_CAP_FILE_CACHE
;
803 used
|= CEPH_CAP_FILE_WR
;
804 if (ci
->i_wrbuffer_ref
)
805 used
|= CEPH_CAP_FILE_BUFFER
;
810 * wanted, by virtue of open file modes
812 int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
)
816 for (mode
= 0; mode
< 4; mode
++)
817 if (ci
->i_nr_by_mode
[mode
])
818 want
|= ceph_caps_for_mode(mode
);
823 * Return caps we have registered with the MDS(s) as 'wanted'.
825 int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
)
827 struct ceph_cap
*cap
;
831 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
832 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
833 if (!__cap_is_valid(cap
))
835 mds_wanted
|= cap
->mds_wanted
;
841 * called under i_lock
843 static int __ceph_is_any_caps(struct ceph_inode_info
*ci
)
845 return !RB_EMPTY_ROOT(&ci
->i_caps
) || ci
->i_cap_exporting_mds
>= 0;
849 * caller should hold i_lock, and session s_mutex.
850 * returns true if this is the last cap. if so, caller should iput.
852 void __ceph_remove_cap(struct ceph_cap
*cap
,
853 struct ceph_cap_reservation
*ctx
)
855 struct ceph_mds_session
*session
= cap
->session
;
856 struct ceph_inode_info
*ci
= cap
->ci
;
857 struct ceph_mds_client
*mdsc
= &ceph_client(ci
->vfs_inode
.i_sb
)->mdsc
;
859 dout("__ceph_remove_cap %p from %p\n", cap
, &ci
->vfs_inode
);
861 /* remove from session list */
862 spin_lock(&session
->s_cap_lock
);
863 list_del_init(&cap
->session_caps
);
864 session
->s_nr_caps
--;
865 spin_unlock(&session
->s_cap_lock
);
867 /* remove from inode list */
868 rb_erase(&cap
->ci_node
, &ci
->i_caps
);
870 if (ci
->i_auth_cap
== cap
)
871 ci
->i_auth_cap
= NULL
;
875 if (!__ceph_is_any_caps(ci
) && ci
->i_snap_realm
) {
876 struct ceph_snap_realm
*realm
= ci
->i_snap_realm
;
877 spin_lock(&realm
->inodes_with_caps_lock
);
878 list_del_init(&ci
->i_snap_realm_item
);
879 ci
->i_snap_realm_counter
++;
880 ci
->i_snap_realm
= NULL
;
881 spin_unlock(&realm
->inodes_with_caps_lock
);
882 ceph_put_snap_realm(mdsc
, realm
);
884 if (!__ceph_is_any_real_caps(ci
))
885 __cap_delay_cancel(mdsc
, ci
);
889 * Build and send a cap message to the given MDS.
891 * Caller should be holding s_mutex.
893 static int send_cap_msg(struct ceph_mds_session
*session
,
894 u64 ino
, u64 cid
, int op
,
895 int caps
, int wanted
, int dirty
,
896 u32 seq
, u64 flush_tid
, u32 issue_seq
, u32 mseq
,
897 u64 size
, u64 max_size
,
898 struct timespec
*mtime
, struct timespec
*atime
,
900 uid_t uid
, gid_t gid
, mode_t mode
,
902 struct ceph_buffer
*xattrs_buf
,
905 struct ceph_mds_caps
*fc
;
906 struct ceph_msg
*msg
;
908 dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s"
909 " seq %u/%u mseq %u follows %lld size %llu/%llu"
910 " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(op
),
911 cid
, ino
, ceph_cap_string(caps
), ceph_cap_string(wanted
),
912 ceph_cap_string(dirty
),
913 seq
, issue_seq
, mseq
, follows
, size
, max_size
,
914 xattr_version
, xattrs_buf
? (int)xattrs_buf
->vec
.iov_len
: 0);
916 msg
= ceph_msg_new(CEPH_MSG_CLIENT_CAPS
, sizeof(*fc
), 0, 0, NULL
);
920 fc
= msg
->front
.iov_base
;
922 memset(fc
, 0, sizeof(*fc
));
924 fc
->cap_id
= cpu_to_le64(cid
);
925 fc
->op
= cpu_to_le32(op
);
926 fc
->seq
= cpu_to_le32(seq
);
927 fc
->client_tid
= cpu_to_le64(flush_tid
);
928 fc
->issue_seq
= cpu_to_le32(issue_seq
);
929 fc
->migrate_seq
= cpu_to_le32(mseq
);
930 fc
->caps
= cpu_to_le32(caps
);
931 fc
->wanted
= cpu_to_le32(wanted
);
932 fc
->dirty
= cpu_to_le32(dirty
);
933 fc
->ino
= cpu_to_le64(ino
);
934 fc
->snap_follows
= cpu_to_le64(follows
);
936 fc
->size
= cpu_to_le64(size
);
937 fc
->max_size
= cpu_to_le64(max_size
);
939 ceph_encode_timespec(&fc
->mtime
, mtime
);
941 ceph_encode_timespec(&fc
->atime
, atime
);
942 fc
->time_warp_seq
= cpu_to_le32(time_warp_seq
);
944 fc
->uid
= cpu_to_le32(uid
);
945 fc
->gid
= cpu_to_le32(gid
);
946 fc
->mode
= cpu_to_le32(mode
);
948 fc
->xattr_version
= cpu_to_le64(xattr_version
);
950 msg
->middle
= ceph_buffer_get(xattrs_buf
);
951 fc
->xattr_len
= cpu_to_le32(xattrs_buf
->vec
.iov_len
);
952 msg
->hdr
.middle_len
= cpu_to_le32(xattrs_buf
->vec
.iov_len
);
955 ceph_con_send(&session
->s_con
, msg
);
960 * Queue cap releases when an inode is dropped from our
963 void ceph_queue_caps_release(struct inode
*inode
)
965 struct ceph_inode_info
*ci
= ceph_inode(inode
);
968 spin_lock(&inode
->i_lock
);
969 p
= rb_first(&ci
->i_caps
);
971 struct ceph_cap
*cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
972 struct ceph_mds_session
*session
= cap
->session
;
973 struct ceph_msg
*msg
;
974 struct ceph_mds_cap_release
*head
;
975 struct ceph_mds_cap_item
*item
;
977 spin_lock(&session
->s_cap_lock
);
978 BUG_ON(!session
->s_num_cap_releases
);
979 msg
= list_first_entry(&session
->s_cap_releases
,
980 struct ceph_msg
, list_head
);
982 dout(" adding %p release to mds%d msg %p (%d left)\n",
983 inode
, session
->s_mds
, msg
, session
->s_num_cap_releases
);
985 BUG_ON(msg
->front
.iov_len
+ sizeof(*item
) > PAGE_CACHE_SIZE
);
986 head
= msg
->front
.iov_base
;
987 head
->num
= cpu_to_le32(le32_to_cpu(head
->num
) + 1);
988 item
= msg
->front
.iov_base
+ msg
->front
.iov_len
;
989 item
->ino
= cpu_to_le64(ceph_ino(inode
));
990 item
->cap_id
= cpu_to_le64(cap
->cap_id
);
991 item
->migrate_seq
= cpu_to_le32(cap
->mseq
);
992 item
->seq
= cpu_to_le32(cap
->issue_seq
);
994 session
->s_num_cap_releases
--;
996 msg
->front
.iov_len
+= sizeof(*item
);
997 if (le32_to_cpu(head
->num
) == CEPH_CAPS_PER_RELEASE
) {
998 dout(" release msg %p full\n", msg
);
999 list_move_tail(&msg
->list_head
,
1000 &session
->s_cap_releases_done
);
1002 dout(" release msg %p at %d/%d (%d)\n", msg
,
1003 (int)le32_to_cpu(head
->num
),
1004 (int)CEPH_CAPS_PER_RELEASE
,
1005 (int)msg
->front
.iov_len
);
1007 spin_unlock(&session
->s_cap_lock
);
1009 __ceph_remove_cap(cap
, NULL
);
1012 spin_unlock(&inode
->i_lock
);
1016 * Send a cap msg on the given inode. Update our caps state, then
1017 * drop i_lock and send the message.
1019 * Make note of max_size reported/requested from mds, revoked caps
1020 * that have now been implemented.
1022 * Make half-hearted attempt ot to invalidate page cache if we are
1023 * dropping RDCACHE. Note that this will leave behind locked pages
1024 * that we'll then need to deal with elsewhere.
1026 * Return non-zero if delayed release, or we experienced an error
1027 * such that the caller should requeue + retry later.
1029 * called with i_lock, then drops it.
1030 * caller should hold snap_rwsem (read), s_mutex.
1032 static int __send_cap(struct ceph_mds_client
*mdsc
, struct ceph_cap
*cap
,
1033 int op
, int used
, int want
, int retain
, int flushing
,
1034 unsigned *pflush_tid
)
1035 __releases(cap
->ci
->vfs_inode
->i_lock
)
1037 struct ceph_inode_info
*ci
= cap
->ci
;
1038 struct inode
*inode
= &ci
->vfs_inode
;
1039 u64 cap_id
= cap
->cap_id
;
1040 int held
= cap
->issued
| cap
->implemented
;
1041 int revoking
= cap
->implemented
& ~cap
->issued
;
1042 int dropping
= cap
->issued
& ~retain
;
1044 u64 seq
, issue_seq
, mseq
, time_warp_seq
, follows
;
1046 struct timespec mtime
, atime
;
1051 struct ceph_mds_session
*session
;
1052 u64 xattr_version
= 0;
1058 dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n",
1059 inode
, cap
, cap
->session
,
1060 ceph_cap_string(held
), ceph_cap_string(held
& retain
),
1061 ceph_cap_string(revoking
));
1062 BUG_ON((retain
& CEPH_CAP_PIN
) == 0);
1064 session
= cap
->session
;
1066 /* don't release wanted unless we've waited a bit. */
1067 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0 &&
1068 time_before(jiffies
, ci
->i_hold_caps_min
)) {
1069 dout(" delaying issued %s -> %s, wanted %s -> %s on send\n",
1070 ceph_cap_string(cap
->issued
),
1071 ceph_cap_string(cap
->issued
& retain
),
1072 ceph_cap_string(cap
->mds_wanted
),
1073 ceph_cap_string(want
));
1074 want
|= cap
->mds_wanted
;
1075 retain
|= cap
->issued
;
1078 ci
->i_ceph_flags
&= ~(CEPH_I_NODELAY
| CEPH_I_FLUSH
);
1080 cap
->issued
&= retain
; /* drop bits we don't want */
1081 if (cap
->implemented
& ~cap
->issued
) {
1083 * Wake up any waiters on wanted -> needed transition.
1084 * This is due to the weird transition from buffered
1085 * to sync IO... we need to flush dirty pages _before_
1086 * allowing sync writes to avoid reordering.
1090 cap
->implemented
&= cap
->issued
| used
;
1091 cap
->mds_wanted
= want
;
1095 * assign a tid for flush operations so we can avoid
1096 * flush1 -> dirty1 -> flush2 -> flushack1 -> mark
1097 * clean type races. track latest tid for every bit
1098 * so we can handle flush AxFw, flush Fw, and have the
1099 * first ack clean Ax.
1101 flush_tid
= ++ci
->i_cap_flush_last_tid
;
1103 *pflush_tid
= flush_tid
;
1104 dout(" cap_flush_tid %d\n", (int)flush_tid
);
1105 for (i
= 0; i
< CEPH_CAP_BITS
; i
++)
1106 if (flushing
& (1 << i
))
1107 ci
->i_cap_flush_tid
[i
] = flush_tid
;
1110 keep
= cap
->implemented
;
1112 issue_seq
= cap
->issue_seq
;
1114 size
= inode
->i_size
;
1115 ci
->i_reported_size
= size
;
1116 max_size
= ci
->i_wanted_max_size
;
1117 ci
->i_requested_max_size
= max_size
;
1118 mtime
= inode
->i_mtime
;
1119 atime
= inode
->i_atime
;
1120 time_warp_seq
= ci
->i_time_warp_seq
;
1121 follows
= ci
->i_snap_realm
->cached_context
->seq
;
1124 mode
= inode
->i_mode
;
1126 if (dropping
& CEPH_CAP_XATTR_EXCL
) {
1127 __ceph_build_xattrs_blob(ci
);
1128 xattr_version
= ci
->i_xattrs
.version
+ 1;
1131 spin_unlock(&inode
->i_lock
);
1133 if (dropping
& CEPH_CAP_FILE_CACHE
) {
1134 /* invalidate what we can */
1135 dout("invalidating pages on %p\n", inode
);
1136 invalidate_mapping_pages(&inode
->i_data
, 0, -1);
1139 ret
= send_cap_msg(session
, ceph_vino(inode
).ino
, cap_id
,
1140 op
, keep
, want
, flushing
, seq
, flush_tid
, issue_seq
, mseq
,
1141 size
, max_size
, &mtime
, &atime
, time_warp_seq
,
1144 (flushing
& CEPH_CAP_XATTR_EXCL
) ? ci
->i_xattrs
.blob
: NULL
,
1147 dout("error sending cap msg, must requeue %p\n", inode
);
1152 wake_up(&ci
->i_cap_wq
);
1158 * When a snapshot is taken, clients accumulate dirty metadata on
1159 * inodes with capabilities in ceph_cap_snaps to describe the file
1160 * state at the time the snapshot was taken. This must be flushed
1161 * asynchronously back to the MDS once sync writes complete and dirty
1162 * data is written out.
1164 * Called under i_lock. Takes s_mutex as needed.
1166 void __ceph_flush_snaps(struct ceph_inode_info
*ci
,
1167 struct ceph_mds_session
**psession
)
1169 struct inode
*inode
= &ci
->vfs_inode
;
1171 struct ceph_cap_snap
*capsnap
;
1173 struct ceph_mds_client
*mdsc
= &ceph_inode_to_client(inode
)->mdsc
;
1174 struct ceph_mds_session
*session
= NULL
; /* if session != NULL, we hold
1176 u64 next_follows
= 0; /* keep track of how far we've gotten through the
1177 i_cap_snaps list, and skip these entries next time
1178 around to avoid an infinite loop */
1181 session
= *psession
;
1183 dout("__flush_snaps %p\n", inode
);
1185 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
1186 /* avoid an infiniute loop after retry */
1187 if (capsnap
->follows
< next_follows
)
1190 * we need to wait for sync writes to complete and for dirty
1191 * pages to be written out.
1193 if (capsnap
->dirty_pages
|| capsnap
->writing
)
1196 /* pick mds, take s_mutex */
1197 mds
= __ceph_get_cap_mds(ci
, &mseq
);
1198 if (session
&& session
->s_mds
!= mds
) {
1199 dout("oops, wrong session %p mutex\n", session
);
1200 mutex_unlock(&session
->s_mutex
);
1201 ceph_put_mds_session(session
);
1205 spin_unlock(&inode
->i_lock
);
1206 mutex_lock(&mdsc
->mutex
);
1207 session
= __ceph_lookup_mds_session(mdsc
, mds
);
1208 mutex_unlock(&mdsc
->mutex
);
1210 dout("inverting session/ino locks on %p\n",
1212 mutex_lock(&session
->s_mutex
);
1215 * if session == NULL, we raced against a cap
1216 * deletion. retry, and we'll get a better
1217 * @mds value next time.
1219 spin_lock(&inode
->i_lock
);
1223 capsnap
->flush_tid
= ++ci
->i_cap_flush_last_tid
;
1224 atomic_inc(&capsnap
->nref
);
1225 if (!list_empty(&capsnap
->flushing_item
))
1226 list_del_init(&capsnap
->flushing_item
);
1227 list_add_tail(&capsnap
->flushing_item
,
1228 &session
->s_cap_snaps_flushing
);
1229 spin_unlock(&inode
->i_lock
);
1231 dout("flush_snaps %p cap_snap %p follows %lld size %llu\n",
1232 inode
, capsnap
, next_follows
, capsnap
->size
);
1233 send_cap_msg(session
, ceph_vino(inode
).ino
, 0,
1234 CEPH_CAP_OP_FLUSHSNAP
, capsnap
->issued
, 0,
1235 capsnap
->dirty
, 0, capsnap
->flush_tid
, 0, mseq
,
1237 &capsnap
->mtime
, &capsnap
->atime
,
1238 capsnap
->time_warp_seq
,
1239 capsnap
->uid
, capsnap
->gid
, capsnap
->mode
,
1243 next_follows
= capsnap
->follows
+ 1;
1244 ceph_put_cap_snap(capsnap
);
1246 spin_lock(&inode
->i_lock
);
1250 /* we flushed them all; remove this inode from the queue */
1251 spin_lock(&mdsc
->snap_flush_lock
);
1252 list_del_init(&ci
->i_snap_flush_item
);
1253 spin_unlock(&mdsc
->snap_flush_lock
);
1256 *psession
= session
;
1258 mutex_unlock(&session
->s_mutex
);
1259 ceph_put_mds_session(session
);
1263 static void ceph_flush_snaps(struct ceph_inode_info
*ci
)
1265 struct inode
*inode
= &ci
->vfs_inode
;
1267 spin_lock(&inode
->i_lock
);
1268 __ceph_flush_snaps(ci
, NULL
);
1269 spin_unlock(&inode
->i_lock
);
1273 * Mark caps dirty. If inode is newly dirty, add to the global dirty
1276 void __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
)
1278 struct ceph_mds_client
*mdsc
= &ceph_client(ci
->vfs_inode
.i_sb
)->mdsc
;
1279 struct inode
*inode
= &ci
->vfs_inode
;
1280 int was
= ci
->i_dirty_caps
;
1283 dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci
->vfs_inode
,
1284 ceph_cap_string(mask
), ceph_cap_string(was
),
1285 ceph_cap_string(was
| mask
));
1286 ci
->i_dirty_caps
|= mask
;
1288 dout(" inode %p now dirty\n", &ci
->vfs_inode
);
1289 BUG_ON(!list_empty(&ci
->i_dirty_item
));
1290 spin_lock(&mdsc
->cap_dirty_lock
);
1291 list_add(&ci
->i_dirty_item
, &mdsc
->cap_dirty
);
1292 spin_unlock(&mdsc
->cap_dirty_lock
);
1293 if (ci
->i_flushing_caps
== 0) {
1295 dirty
|= I_DIRTY_SYNC
;
1298 BUG_ON(list_empty(&ci
->i_dirty_item
));
1299 if (((was
| ci
->i_flushing_caps
) & CEPH_CAP_FILE_BUFFER
) &&
1300 (mask
& CEPH_CAP_FILE_BUFFER
))
1301 dirty
|= I_DIRTY_DATASYNC
;
1303 __mark_inode_dirty(inode
, dirty
);
1304 __cap_delay_requeue(mdsc
, ci
);
1308 * Add dirty inode to the flushing list. Assigned a seq number so we
1309 * can wait for caps to flush without starving.
1311 * Called under i_lock.
1313 static int __mark_caps_flushing(struct inode
*inode
,
1314 struct ceph_mds_session
*session
)
1316 struct ceph_mds_client
*mdsc
= &ceph_client(inode
->i_sb
)->mdsc
;
1317 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1320 BUG_ON(ci
->i_dirty_caps
== 0);
1321 BUG_ON(list_empty(&ci
->i_dirty_item
));
1323 flushing
= ci
->i_dirty_caps
;
1324 dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n",
1325 ceph_cap_string(flushing
),
1326 ceph_cap_string(ci
->i_flushing_caps
),
1327 ceph_cap_string(ci
->i_flushing_caps
| flushing
));
1328 ci
->i_flushing_caps
|= flushing
;
1329 ci
->i_dirty_caps
= 0;
1330 dout(" inode %p now !dirty\n", inode
);
1332 spin_lock(&mdsc
->cap_dirty_lock
);
1333 list_del_init(&ci
->i_dirty_item
);
1335 ci
->i_cap_flush_seq
= ++mdsc
->cap_flush_seq
;
1336 if (list_empty(&ci
->i_flushing_item
)) {
1337 list_add_tail(&ci
->i_flushing_item
, &session
->s_cap_flushing
);
1338 mdsc
->num_cap_flushing
++;
1339 dout(" inode %p now flushing seq %lld\n", inode
,
1340 ci
->i_cap_flush_seq
);
1342 list_move_tail(&ci
->i_flushing_item
, &session
->s_cap_flushing
);
1343 dout(" inode %p now flushing (more) seq %lld\n", inode
,
1344 ci
->i_cap_flush_seq
);
1346 spin_unlock(&mdsc
->cap_dirty_lock
);
1352 * Swiss army knife function to examine currently used and wanted
1353 * versus held caps. Release, flush, ack revoked caps to mds as
1356 * CHECK_CAPS_NODELAY - caller is delayed work and we should not delay
1357 * cap release further.
1358 * CHECK_CAPS_AUTHONLY - we should only check the auth cap
1359 * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without
1362 void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
1363 struct ceph_mds_session
*session
)
1365 struct ceph_client
*client
= ceph_inode_to_client(&ci
->vfs_inode
);
1366 struct ceph_mds_client
*mdsc
= &client
->mdsc
;
1367 struct inode
*inode
= &ci
->vfs_inode
;
1368 struct ceph_cap
*cap
;
1369 int file_wanted
, used
;
1370 int took_snap_rwsem
= 0; /* true if mdsc->snap_rwsem held */
1371 int drop_session_lock
= session
? 0 : 1;
1372 int want
, retain
, revoking
, flushing
= 0;
1373 int mds
= -1; /* keep track of how far we've gone through i_caps list
1374 to avoid an infinite loop on retry */
1376 int tried_invalidate
= 0;
1377 int delayed
= 0, sent
= 0, force_requeue
= 0, num
;
1378 int is_delayed
= flags
& CHECK_CAPS_NODELAY
;
1380 /* if we are unmounting, flush any unused caps immediately. */
1384 spin_lock(&inode
->i_lock
);
1386 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
1387 flags
|= CHECK_CAPS_FLUSH
;
1389 /* flush snaps first time around only */
1390 if (!list_empty(&ci
->i_cap_snaps
))
1391 __ceph_flush_snaps(ci
, &session
);
1394 spin_lock(&inode
->i_lock
);
1396 file_wanted
= __ceph_caps_file_wanted(ci
);
1397 used
= __ceph_caps_used(ci
);
1398 want
= file_wanted
| used
;
1400 retain
= want
| CEPH_CAP_PIN
;
1401 if (!mdsc
->stopping
&& inode
->i_nlink
> 0) {
1403 retain
|= CEPH_CAP_ANY
; /* be greedy */
1405 retain
|= CEPH_CAP_ANY_SHARED
;
1407 * keep RD only if we didn't have the file open RW,
1408 * because then the mds would revoke it anyway to
1409 * journal max_size=0.
1411 if (ci
->i_max_size
== 0)
1412 retain
|= CEPH_CAP_ANY_RD
;
1416 dout("check_caps %p file_want %s used %s dirty %s flushing %s"
1417 " issued %s retain %s %s%s%s\n", inode
,
1418 ceph_cap_string(file_wanted
),
1419 ceph_cap_string(used
), ceph_cap_string(ci
->i_dirty_caps
),
1420 ceph_cap_string(ci
->i_flushing_caps
),
1421 ceph_cap_string(__ceph_caps_issued(ci
, NULL
)),
1422 ceph_cap_string(retain
),
1423 (flags
& CHECK_CAPS_AUTHONLY
) ? " AUTHONLY" : "",
1424 (flags
& CHECK_CAPS_NODELAY
) ? " NODELAY" : "",
1425 (flags
& CHECK_CAPS_FLUSH
) ? " FLUSH" : "");
1428 * If we no longer need to hold onto old our caps, and we may
1429 * have cached pages, but don't want them, then try to invalidate.
1430 * If we fail, it's because pages are locked.... try again later.
1432 if ((!is_delayed
|| mdsc
->stopping
) &&
1433 ci
->i_wrbuffer_ref
== 0 && /* no dirty pages... */
1434 ci
->i_rdcache_gen
&& /* may have cached pages */
1435 file_wanted
== 0 && /* no open files */
1436 !ci
->i_truncate_pending
&&
1437 !tried_invalidate
) {
1438 u32 invalidating_gen
= ci
->i_rdcache_gen
;
1441 dout("check_caps trying to invalidate on %p\n", inode
);
1442 spin_unlock(&inode
->i_lock
);
1443 ret
= invalidate_mapping_pages(&inode
->i_data
, 0, -1);
1444 spin_lock(&inode
->i_lock
);
1445 if (ret
== 0 && invalidating_gen
== ci
->i_rdcache_gen
) {
1447 ci
->i_rdcache_gen
= 0;
1448 ci
->i_rdcache_revoking
= 0;
1450 dout("check_caps failed to invalidate pages\n");
1451 /* we failed to invalidate pages. check these
1452 caps again later. */
1454 __cap_set_timeouts(mdsc
, ci
);
1456 tried_invalidate
= 1;
1461 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
1462 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1465 /* avoid looping forever */
1466 if (mds
>= cap
->mds
||
1467 ((flags
& CHECK_CAPS_AUTHONLY
) && cap
!= ci
->i_auth_cap
))
1470 /* NOTE: no side-effects allowed, until we take s_mutex */
1472 revoking
= cap
->implemented
& ~cap
->issued
;
1474 dout("mds%d revoking %s\n", cap
->mds
,
1475 ceph_cap_string(revoking
));
1477 if (cap
== ci
->i_auth_cap
&&
1478 (cap
->issued
& CEPH_CAP_FILE_WR
)) {
1479 /* request larger max_size from MDS? */
1480 if (ci
->i_wanted_max_size
> ci
->i_max_size
&&
1481 ci
->i_wanted_max_size
> ci
->i_requested_max_size
) {
1482 dout("requesting new max_size\n");
1486 /* approaching file_max? */
1487 if ((inode
->i_size
<< 1) >= ci
->i_max_size
&&
1488 (ci
->i_reported_size
<< 1) < ci
->i_max_size
) {
1489 dout("i_size approaching max_size\n");
1493 /* flush anything dirty? */
1494 if (cap
== ci
->i_auth_cap
&& (flags
& CHECK_CAPS_FLUSH
) &&
1496 dout("flushing dirty caps\n");
1500 /* completed revocation? going down and there are no caps? */
1501 if (revoking
&& (revoking
& used
) == 0) {
1502 dout("completed revocation of %s\n",
1503 ceph_cap_string(cap
->implemented
& ~cap
->issued
));
1507 /* want more caps from mds? */
1508 if (want
& ~(cap
->mds_wanted
| cap
->issued
))
1511 /* things we might delay */
1512 if ((cap
->issued
& ~retain
) == 0 &&
1513 cap
->mds_wanted
== want
)
1514 continue; /* nope, all good */
1520 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0 &&
1521 time_before(jiffies
, ci
->i_hold_caps_max
)) {
1522 dout(" delaying issued %s -> %s, wanted %s -> %s\n",
1523 ceph_cap_string(cap
->issued
),
1524 ceph_cap_string(cap
->issued
& retain
),
1525 ceph_cap_string(cap
->mds_wanted
),
1526 ceph_cap_string(want
));
1532 if (session
&& session
!= cap
->session
) {
1533 dout("oops, wrong session %p mutex\n", session
);
1534 mutex_unlock(&session
->s_mutex
);
1538 session
= cap
->session
;
1539 if (mutex_trylock(&session
->s_mutex
) == 0) {
1540 dout("inverting session/ino locks on %p\n",
1542 spin_unlock(&inode
->i_lock
);
1543 if (took_snap_rwsem
) {
1544 up_read(&mdsc
->snap_rwsem
);
1545 took_snap_rwsem
= 0;
1547 mutex_lock(&session
->s_mutex
);
1551 /* take snap_rwsem after session mutex */
1552 if (!took_snap_rwsem
) {
1553 if (down_read_trylock(&mdsc
->snap_rwsem
) == 0) {
1554 dout("inverting snap/in locks on %p\n",
1556 spin_unlock(&inode
->i_lock
);
1557 down_read(&mdsc
->snap_rwsem
);
1558 took_snap_rwsem
= 1;
1561 took_snap_rwsem
= 1;
1564 if (cap
== ci
->i_auth_cap
&& ci
->i_dirty_caps
)
1565 flushing
= __mark_caps_flushing(inode
, session
);
1567 mds
= cap
->mds
; /* remember mds, so we don't repeat */
1570 /* __send_cap drops i_lock */
1571 delayed
+= __send_cap(mdsc
, cap
, CEPH_CAP_OP_UPDATE
, used
, want
,
1572 retain
, flushing
, NULL
);
1573 goto retry
; /* retake i_lock and restart our cap scan. */
1577 * Reschedule delayed caps release if we delayed anything,
1580 if (delayed
&& is_delayed
)
1581 force_requeue
= 1; /* __send_cap delayed release; requeue */
1582 if (!delayed
&& !is_delayed
)
1583 __cap_delay_cancel(mdsc
, ci
);
1584 else if (!is_delayed
|| force_requeue
)
1585 __cap_delay_requeue(mdsc
, ci
);
1587 spin_unlock(&inode
->i_lock
);
1589 if (session
&& drop_session_lock
)
1590 mutex_unlock(&session
->s_mutex
);
1591 if (took_snap_rwsem
)
1592 up_read(&mdsc
->snap_rwsem
);
1596 * Try to flush dirty caps back to the auth mds.
1598 static int try_flush_caps(struct inode
*inode
, struct ceph_mds_session
*session
,
1599 unsigned *flush_tid
)
1601 struct ceph_mds_client
*mdsc
= &ceph_client(inode
->i_sb
)->mdsc
;
1602 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1603 int unlock_session
= session
? 0 : 1;
1607 spin_lock(&inode
->i_lock
);
1608 if (ci
->i_dirty_caps
&& ci
->i_auth_cap
) {
1609 struct ceph_cap
*cap
= ci
->i_auth_cap
;
1610 int used
= __ceph_caps_used(ci
);
1611 int want
= __ceph_caps_wanted(ci
);
1615 spin_unlock(&inode
->i_lock
);
1616 session
= cap
->session
;
1617 mutex_lock(&session
->s_mutex
);
1620 BUG_ON(session
!= cap
->session
);
1621 if (cap
->session
->s_state
< CEPH_MDS_SESSION_OPEN
)
1624 flushing
= __mark_caps_flushing(inode
, session
);
1626 /* __send_cap drops i_lock */
1627 delayed
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
, used
, want
,
1628 cap
->issued
| cap
->implemented
, flushing
,
1633 spin_lock(&inode
->i_lock
);
1634 __cap_delay_requeue(mdsc
, ci
);
1637 spin_unlock(&inode
->i_lock
);
1639 if (session
&& unlock_session
)
1640 mutex_unlock(&session
->s_mutex
);
1645 * Return true if we've flushed caps through the given flush_tid.
1647 static int caps_are_flushed(struct inode
*inode
, unsigned tid
)
1649 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1650 int dirty
, i
, ret
= 1;
1652 spin_lock(&inode
->i_lock
);
1653 dirty
= __ceph_caps_dirty(ci
);
1654 for (i
= 0; i
< CEPH_CAP_BITS
; i
++)
1655 if ((ci
->i_flushing_caps
& (1 << i
)) &&
1656 ci
->i_cap_flush_tid
[i
] <= tid
) {
1657 /* still flushing this bit */
1661 spin_unlock(&inode
->i_lock
);
1666 * Wait on any unsafe replies for the given inode. First wait on the
1667 * newest request, and make that the upper bound. Then, if there are
1668 * more requests, keep waiting on the oldest as long as it is still older
1669 * than the original request.
1671 static void sync_write_wait(struct inode
*inode
)
1673 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1674 struct list_head
*head
= &ci
->i_unsafe_writes
;
1675 struct ceph_osd_request
*req
;
1678 spin_lock(&ci
->i_unsafe_lock
);
1679 if (list_empty(head
))
1682 /* set upper bound as _last_ entry in chain */
1683 req
= list_entry(head
->prev
, struct ceph_osd_request
,
1685 last_tid
= req
->r_tid
;
1688 ceph_osdc_get_request(req
);
1689 spin_unlock(&ci
->i_unsafe_lock
);
1690 dout("sync_write_wait on tid %llu (until %llu)\n",
1691 req
->r_tid
, last_tid
);
1692 wait_for_completion(&req
->r_safe_completion
);
1693 spin_lock(&ci
->i_unsafe_lock
);
1694 ceph_osdc_put_request(req
);
1697 * from here on look at first entry in chain, since we
1698 * only want to wait for anything older than last_tid
1700 if (list_empty(head
))
1702 req
= list_entry(head
->next
, struct ceph_osd_request
,
1704 } while (req
->r_tid
< last_tid
);
1706 spin_unlock(&ci
->i_unsafe_lock
);
1709 int ceph_fsync(struct file
*file
, struct dentry
*dentry
, int datasync
)
1711 struct inode
*inode
= dentry
->d_inode
;
1712 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1717 dout("fsync %p%s\n", inode
, datasync
? " datasync" : "");
1718 sync_write_wait(inode
);
1720 ret
= filemap_write_and_wait(inode
->i_mapping
);
1724 dirty
= try_flush_caps(inode
, NULL
, &flush_tid
);
1725 dout("fsync dirty caps are %s\n", ceph_cap_string(dirty
));
1728 * only wait on non-file metadata writeback (the mds
1729 * can recover size and mtime, so we don't need to
1732 if (!datasync
&& (dirty
& ~CEPH_CAP_ANY_FILE_WR
)) {
1733 dout("fsync waiting for flush_tid %u\n", flush_tid
);
1734 ret
= wait_event_interruptible(ci
->i_cap_wq
,
1735 caps_are_flushed(inode
, flush_tid
));
1738 dout("fsync %p%s done\n", inode
, datasync
? " datasync" : "");
1743 * Flush any dirty caps back to the mds. If we aren't asked to wait,
1744 * queue inode for flush but don't do so immediately, because we can
1745 * get by with fewer MDS messages if we wait for data writeback to
1748 int ceph_write_inode(struct inode
*inode
, int wait
)
1750 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1755 dout("write_inode %p wait=%d\n", inode
, wait
);
1757 dirty
= try_flush_caps(inode
, NULL
, &flush_tid
);
1759 err
= wait_event_interruptible(ci
->i_cap_wq
,
1760 caps_are_flushed(inode
, flush_tid
));
1762 struct ceph_mds_client
*mdsc
= &ceph_client(inode
->i_sb
)->mdsc
;
1764 spin_lock(&inode
->i_lock
);
1765 if (__ceph_caps_dirty(ci
))
1766 __cap_delay_requeue_front(mdsc
, ci
);
1767 spin_unlock(&inode
->i_lock
);
1773 * After a recovering MDS goes active, we need to resend any caps
1776 * Caller holds session->s_mutex.
1778 static void kick_flushing_capsnaps(struct ceph_mds_client
*mdsc
,
1779 struct ceph_mds_session
*session
)
1781 struct ceph_cap_snap
*capsnap
;
1783 dout("kick_flushing_capsnaps mds%d\n", session
->s_mds
);
1784 list_for_each_entry(capsnap
, &session
->s_cap_snaps_flushing
,
1786 struct ceph_inode_info
*ci
= capsnap
->ci
;
1787 struct inode
*inode
= &ci
->vfs_inode
;
1788 struct ceph_cap
*cap
;
1790 spin_lock(&inode
->i_lock
);
1791 cap
= ci
->i_auth_cap
;
1792 if (cap
&& cap
->session
== session
) {
1793 dout("kick_flushing_caps %p cap %p capsnap %p\n", inode
,
1795 __ceph_flush_snaps(ci
, &session
);
1797 pr_err("%p auth cap %p not mds%d ???\n", inode
,
1798 cap
, session
->s_mds
);
1799 spin_unlock(&inode
->i_lock
);
1804 void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
1805 struct ceph_mds_session
*session
)
1807 struct ceph_inode_info
*ci
;
1809 kick_flushing_capsnaps(mdsc
, session
);
1811 dout("kick_flushing_caps mds%d\n", session
->s_mds
);
1812 list_for_each_entry(ci
, &session
->s_cap_flushing
, i_flushing_item
) {
1813 struct inode
*inode
= &ci
->vfs_inode
;
1814 struct ceph_cap
*cap
;
1817 spin_lock(&inode
->i_lock
);
1818 cap
= ci
->i_auth_cap
;
1819 if (cap
&& cap
->session
== session
) {
1820 dout("kick_flushing_caps %p cap %p %s\n", inode
,
1821 cap
, ceph_cap_string(ci
->i_flushing_caps
));
1822 delayed
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
,
1823 __ceph_caps_used(ci
),
1824 __ceph_caps_wanted(ci
),
1825 cap
->issued
| cap
->implemented
,
1826 ci
->i_flushing_caps
, NULL
);
1828 spin_lock(&inode
->i_lock
);
1829 __cap_delay_requeue(mdsc
, ci
);
1830 spin_unlock(&inode
->i_lock
);
1833 pr_err("%p auth cap %p not mds%d ???\n", inode
,
1834 cap
, session
->s_mds
);
1835 spin_unlock(&inode
->i_lock
);
1842 * Take references to capabilities we hold, so that we don't release
1843 * them to the MDS prematurely.
1845 * Protected by i_lock.
1847 static void __take_cap_refs(struct ceph_inode_info
*ci
, int got
)
1849 if (got
& CEPH_CAP_PIN
)
1851 if (got
& CEPH_CAP_FILE_RD
)
1853 if (got
& CEPH_CAP_FILE_CACHE
)
1854 ci
->i_rdcache_ref
++;
1855 if (got
& CEPH_CAP_FILE_WR
)
1857 if (got
& CEPH_CAP_FILE_BUFFER
) {
1858 if (ci
->i_wrbuffer_ref
== 0)
1859 igrab(&ci
->vfs_inode
);
1860 ci
->i_wrbuffer_ref
++;
1861 dout("__take_cap_refs %p wrbuffer %d -> %d (?)\n",
1862 &ci
->vfs_inode
, ci
->i_wrbuffer_ref
-1, ci
->i_wrbuffer_ref
);
1867 * Try to grab cap references. Specify those refs we @want, and the
1868 * minimal set we @need. Also include the larger offset we are writing
1869 * to (when applicable), and check against max_size here as well.
1870 * Note that caller is responsible for ensuring max_size increases are
1871 * requested from the MDS.
1873 static int try_get_cap_refs(struct ceph_inode_info
*ci
, int need
, int want
,
1874 int *got
, loff_t endoff
, int *check_max
, int *err
)
1876 struct inode
*inode
= &ci
->vfs_inode
;
1878 int have
, implemented
;
1880 dout("get_cap_refs %p need %s want %s\n", inode
,
1881 ceph_cap_string(need
), ceph_cap_string(want
));
1882 spin_lock(&inode
->i_lock
);
1884 /* make sure we _have_ some caps! */
1885 if (!__ceph_is_any_caps(ci
)) {
1886 dout("get_cap_refs %p no real caps\n", inode
);
1892 if (need
& CEPH_CAP_FILE_WR
) {
1893 if (endoff
>= 0 && endoff
> (loff_t
)ci
->i_max_size
) {
1894 dout("get_cap_refs %p endoff %llu > maxsize %llu\n",
1895 inode
, endoff
, ci
->i_max_size
);
1896 if (endoff
> ci
->i_wanted_max_size
) {
1903 * If a sync write is in progress, we must wait, so that we
1904 * can get a final snapshot value for size+mtime.
1906 if (__ceph_have_pending_cap_snap(ci
)) {
1907 dout("get_cap_refs %p cap_snap_pending\n", inode
);
1911 have
= __ceph_caps_issued(ci
, &implemented
);
1914 * disallow writes while a truncate is pending
1916 if (ci
->i_truncate_pending
)
1917 have
&= ~CEPH_CAP_FILE_WR
;
1919 if ((have
& need
) == need
) {
1921 * Look at (implemented & ~have & not) so that we keep waiting
1922 * on transition from wanted -> needed caps. This is needed
1923 * for WRBUFFER|WR -> WR to avoid a new WR sync write from
1924 * going before a prior buffered writeback happens.
1926 int not = want
& ~(have
& need
);
1927 int revoking
= implemented
& ~have
;
1928 dout("get_cap_refs %p have %s but not %s (revoking %s)\n",
1929 inode
, ceph_cap_string(have
), ceph_cap_string(not),
1930 ceph_cap_string(revoking
));
1931 if ((revoking
& not) == 0) {
1932 *got
= need
| (have
& want
);
1933 __take_cap_refs(ci
, *got
);
1937 dout("get_cap_refs %p have %s needed %s\n", inode
,
1938 ceph_cap_string(have
), ceph_cap_string(need
));
1941 spin_unlock(&inode
->i_lock
);
1942 dout("get_cap_refs %p ret %d got %s\n", inode
,
1943 ret
, ceph_cap_string(*got
));
1948 * Check the offset we are writing up to against our current
1949 * max_size. If necessary, tell the MDS we want to write to
1952 static void check_max_size(struct inode
*inode
, loff_t endoff
)
1954 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1957 /* do we need to explicitly request a larger max_size? */
1958 spin_lock(&inode
->i_lock
);
1959 if ((endoff
>= ci
->i_max_size
||
1960 endoff
> (inode
->i_size
<< 1)) &&
1961 endoff
> ci
->i_wanted_max_size
) {
1962 dout("write %p at large endoff %llu, req max_size\n",
1964 ci
->i_wanted_max_size
= endoff
;
1967 spin_unlock(&inode
->i_lock
);
1969 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
1973 * Wait for caps, and take cap references. If we can't get a WR cap
1974 * due to a small max_size, make sure we check_max_size (and possibly
1975 * ask the mds) so we don't get hung up indefinitely.
1977 int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
, int *got
,
1980 int check_max
, ret
, err
;
1984 check_max_size(&ci
->vfs_inode
, endoff
);
1987 ret
= wait_event_interruptible(ci
->i_cap_wq
,
1988 try_get_cap_refs(ci
, need
, want
,
1999 * Take cap refs. Caller must already know we hold at least one ref
2000 * on the caps in question or we don't know this is safe.
2002 void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
)
2004 spin_lock(&ci
->vfs_inode
.i_lock
);
2005 __take_cap_refs(ci
, caps
);
2006 spin_unlock(&ci
->vfs_inode
.i_lock
);
2012 * If we released the last ref on any given cap, call ceph_check_caps
2013 * to release (or schedule a release).
2015 * If we are releasing a WR cap (from a sync write), finalize any affected
2016 * cap_snap, and wake up any waiters.
2018 void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
)
2020 struct inode
*inode
= &ci
->vfs_inode
;
2021 int last
= 0, put
= 0, flushsnaps
= 0, wake
= 0;
2022 struct ceph_cap_snap
*capsnap
;
2024 spin_lock(&inode
->i_lock
);
2025 if (had
& CEPH_CAP_PIN
)
2027 if (had
& CEPH_CAP_FILE_RD
)
2028 if (--ci
->i_rd_ref
== 0)
2030 if (had
& CEPH_CAP_FILE_CACHE
)
2031 if (--ci
->i_rdcache_ref
== 0)
2033 if (had
& CEPH_CAP_FILE_BUFFER
) {
2034 if (--ci
->i_wrbuffer_ref
== 0) {
2038 dout("put_cap_refs %p wrbuffer %d -> %d (?)\n",
2039 inode
, ci
->i_wrbuffer_ref
+1, ci
->i_wrbuffer_ref
);
2041 if (had
& CEPH_CAP_FILE_WR
)
2042 if (--ci
->i_wr_ref
== 0) {
2044 if (!list_empty(&ci
->i_cap_snaps
)) {
2045 capsnap
= list_first_entry(&ci
->i_cap_snaps
,
2046 struct ceph_cap_snap
,
2048 if (capsnap
->writing
) {
2049 capsnap
->writing
= 0;
2051 __ceph_finish_cap_snap(ci
,
2057 spin_unlock(&inode
->i_lock
);
2059 dout("put_cap_refs %p had %s %s\n", inode
, ceph_cap_string(had
),
2060 last
? "last" : "");
2062 if (last
&& !flushsnaps
)
2063 ceph_check_caps(ci
, 0, NULL
);
2064 else if (flushsnaps
)
2065 ceph_flush_snaps(ci
);
2067 wake_up(&ci
->i_cap_wq
);
2073 * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap
2074 * context. Adjust per-snap dirty page accounting as appropriate.
2075 * Once all dirty data for a cap_snap is flushed, flush snapped file
2076 * metadata back to the MDS. If we dropped the last ref, call
2079 void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
2080 struct ceph_snap_context
*snapc
)
2082 struct inode
*inode
= &ci
->vfs_inode
;
2086 struct ceph_cap_snap
*capsnap
= NULL
;
2088 spin_lock(&inode
->i_lock
);
2089 ci
->i_wrbuffer_ref
-= nr
;
2090 last
= !ci
->i_wrbuffer_ref
;
2092 if (ci
->i_head_snapc
== snapc
) {
2093 ci
->i_wrbuffer_ref_head
-= nr
;
2094 if (!ci
->i_wrbuffer_ref_head
) {
2095 ceph_put_snap_context(ci
->i_head_snapc
);
2096 ci
->i_head_snapc
= NULL
;
2098 dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n",
2100 ci
->i_wrbuffer_ref
+nr
, ci
->i_wrbuffer_ref_head
+nr
,
2101 ci
->i_wrbuffer_ref
, ci
->i_wrbuffer_ref_head
,
2102 last
? " LAST" : "");
2104 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
2105 if (capsnap
->context
== snapc
) {
2107 capsnap
->dirty_pages
-= nr
;
2108 last_snap
= !capsnap
->dirty_pages
;
2113 dout("put_wrbuffer_cap_refs on %p cap_snap %p "
2114 " snap %lld %d/%d -> %d/%d %s%s\n",
2115 inode
, capsnap
, capsnap
->context
->seq
,
2116 ci
->i_wrbuffer_ref
+nr
, capsnap
->dirty_pages
+ nr
,
2117 ci
->i_wrbuffer_ref
, capsnap
->dirty_pages
,
2118 last
? " (wrbuffer last)" : "",
2119 last_snap
? " (capsnap last)" : "");
2122 spin_unlock(&inode
->i_lock
);
2125 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
2127 } else if (last_snap
) {
2128 ceph_flush_snaps(ci
);
2129 wake_up(&ci
->i_cap_wq
);
2134 * Handle a cap GRANT message from the MDS. (Note that a GRANT may
2135 * actually be a revocation if it specifies a smaller cap set.)
2137 * caller holds s_mutex.
2140 * 1 - check_caps on auth cap only (writeback)
2141 * 2 - check_caps (ack revoke)
2143 static int handle_cap_grant(struct inode
*inode
, struct ceph_mds_caps
*grant
,
2144 struct ceph_mds_session
*session
,
2145 struct ceph_cap
*cap
,
2146 struct ceph_buffer
*xattr_buf
)
2147 __releases(inode
->i_lock
)
2150 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2151 int mds
= session
->s_mds
;
2152 int seq
= le32_to_cpu(grant
->seq
);
2153 int newcaps
= le32_to_cpu(grant
->caps
);
2154 int issued
, implemented
, used
, wanted
, dirty
;
2155 u64 size
= le64_to_cpu(grant
->size
);
2156 u64 max_size
= le64_to_cpu(grant
->max_size
);
2157 struct timespec mtime
, atime
, ctime
;
2161 int revoked_rdcache
= 0;
2162 int invalidate_async
= 0;
2163 int tried_invalidate
= 0;
2166 dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n",
2167 inode
, cap
, mds
, seq
, ceph_cap_string(newcaps
));
2168 dout(" size %llu max_size %llu, i_size %llu\n", size
, max_size
,
2172 * If CACHE is being revoked, and we have no dirty buffers,
2173 * try to invalidate (once). (If there are dirty buffers, we
2174 * will invalidate _after_ writeback.)
2177 if (((cap
->issued
& ~newcaps
) & CEPH_CAP_FILE_CACHE
) &&
2178 !ci
->i_wrbuffer_ref
&& !tried_invalidate
) {
2179 dout("CACHE invalidation\n");
2180 spin_unlock(&inode
->i_lock
);
2181 tried_invalidate
= 1;
2183 ret
= invalidate_mapping_pages(&inode
->i_data
, 0, -1);
2184 spin_lock(&inode
->i_lock
);
2186 /* there were locked pages.. invalidate later
2187 in a separate thread. */
2188 if (ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
2189 invalidate_async
= 1;
2190 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
2193 /* we successfully invalidated those pages */
2194 revoked_rdcache
= 1;
2195 ci
->i_rdcache_gen
= 0;
2196 ci
->i_rdcache_revoking
= 0;
2201 /* side effects now are allowed */
2203 issued
= __ceph_caps_issued(ci
, &implemented
);
2204 issued
|= implemented
| __ceph_caps_dirty(ci
);
2206 cap
->cap_gen
= session
->s_cap_gen
;
2208 __check_cap_issue(ci
, cap
, newcaps
);
2210 if ((issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
2211 inode
->i_mode
= le32_to_cpu(grant
->mode
);
2212 inode
->i_uid
= le32_to_cpu(grant
->uid
);
2213 inode
->i_gid
= le32_to_cpu(grant
->gid
);
2214 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
2215 inode
->i_uid
, inode
->i_gid
);
2218 if ((issued
& CEPH_CAP_LINK_EXCL
) == 0)
2219 inode
->i_nlink
= le32_to_cpu(grant
->nlink
);
2221 if ((issued
& CEPH_CAP_XATTR_EXCL
) == 0 && grant
->xattr_len
) {
2222 int len
= le32_to_cpu(grant
->xattr_len
);
2223 u64 version
= le64_to_cpu(grant
->xattr_version
);
2225 if (version
> ci
->i_xattrs
.version
) {
2226 dout(" got new xattrs v%llu on %p len %d\n",
2227 version
, inode
, len
);
2228 if (ci
->i_xattrs
.blob
)
2229 ceph_buffer_put(ci
->i_xattrs
.blob
);
2230 ci
->i_xattrs
.blob
= ceph_buffer_get(xattr_buf
);
2231 ci
->i_xattrs
.version
= version
;
2235 /* size/ctime/mtime/atime? */
2236 ceph_fill_file_size(inode
, issued
,
2237 le32_to_cpu(grant
->truncate_seq
),
2238 le64_to_cpu(grant
->truncate_size
), size
);
2239 ceph_decode_timespec(&mtime
, &grant
->mtime
);
2240 ceph_decode_timespec(&atime
, &grant
->atime
);
2241 ceph_decode_timespec(&ctime
, &grant
->ctime
);
2242 ceph_fill_file_time(inode
, issued
,
2243 le32_to_cpu(grant
->time_warp_seq
), &ctime
, &mtime
,
2246 /* max size increase? */
2247 if (max_size
!= ci
->i_max_size
) {
2248 dout("max_size %lld -> %llu\n", ci
->i_max_size
, max_size
);
2249 ci
->i_max_size
= max_size
;
2250 if (max_size
>= ci
->i_wanted_max_size
) {
2251 ci
->i_wanted_max_size
= 0; /* reset */
2252 ci
->i_requested_max_size
= 0;
2257 /* check cap bits */
2258 wanted
= __ceph_caps_wanted(ci
);
2259 used
= __ceph_caps_used(ci
);
2260 dirty
= __ceph_caps_dirty(ci
);
2261 dout(" my wanted = %s, used = %s, dirty %s\n",
2262 ceph_cap_string(wanted
),
2263 ceph_cap_string(used
),
2264 ceph_cap_string(dirty
));
2265 if (wanted
!= le32_to_cpu(grant
->wanted
)) {
2266 dout("mds wanted %s -> %s\n",
2267 ceph_cap_string(le32_to_cpu(grant
->wanted
)),
2268 ceph_cap_string(wanted
));
2269 grant
->wanted
= cpu_to_le32(wanted
);
2274 /* file layout may have changed */
2275 ci
->i_layout
= grant
->layout
;
2277 /* revocation, grant, or no-op? */
2278 if (cap
->issued
& ~newcaps
) {
2279 dout("revocation: %s -> %s\n", ceph_cap_string(cap
->issued
),
2280 ceph_cap_string(newcaps
));
2281 if ((used
& ~newcaps
) & CEPH_CAP_FILE_BUFFER
)
2282 writeback
= 1; /* will delay ack */
2283 else if (dirty
& ~newcaps
)
2284 reply
= 1; /* initiate writeback in check_caps */
2285 else if (((used
& ~newcaps
) & CEPH_CAP_FILE_CACHE
) == 0 ||
2287 reply
= 2; /* send revoke ack in check_caps */
2288 cap
->issued
= newcaps
;
2289 } else if (cap
->issued
== newcaps
) {
2290 dout("caps unchanged: %s -> %s\n",
2291 ceph_cap_string(cap
->issued
), ceph_cap_string(newcaps
));
2293 dout("grant: %s -> %s\n", ceph_cap_string(cap
->issued
),
2294 ceph_cap_string(newcaps
));
2295 cap
->issued
= newcaps
;
2296 cap
->implemented
|= newcaps
; /* add bits only, to
2297 * avoid stepping on a
2298 * pending revocation */
2302 spin_unlock(&inode
->i_lock
);
2305 * queue inode for writeback: we can't actually call
2306 * filemap_write_and_wait, etc. from message handler
2309 dout("queueing %p for writeback\n", inode
);
2310 if (ceph_queue_writeback(inode
))
2313 if (invalidate_async
) {
2314 dout("queueing %p for page invalidation\n", inode
);
2315 if (ceph_queue_page_invalidation(inode
))
2319 wake_up(&ci
->i_cap_wq
);
2324 * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the
2325 * MDS has been safely committed.
2327 static void handle_cap_flush_ack(struct inode
*inode
,
2328 struct ceph_mds_caps
*m
,
2329 struct ceph_mds_session
*session
,
2330 struct ceph_cap
*cap
)
2331 __releases(inode
->i_lock
)
2333 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2334 struct ceph_mds_client
*mdsc
= &ceph_client(inode
->i_sb
)->mdsc
;
2335 unsigned seq
= le32_to_cpu(m
->seq
);
2336 int dirty
= le32_to_cpu(m
->dirty
);
2338 u64 flush_tid
= le64_to_cpu(m
->client_tid
);
2342 for (i
= 0; i
< CEPH_CAP_BITS
; i
++)
2343 if ((dirty
& (1 << i
)) &&
2344 flush_tid
== ci
->i_cap_flush_tid
[i
])
2347 dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s,"
2348 " flushing %s -> %s\n",
2349 inode
, session
->s_mds
, seq
, ceph_cap_string(dirty
),
2350 ceph_cap_string(cleaned
), ceph_cap_string(ci
->i_flushing_caps
),
2351 ceph_cap_string(ci
->i_flushing_caps
& ~cleaned
));
2353 if (ci
->i_flushing_caps
== (ci
->i_flushing_caps
& ~cleaned
))
2356 ci
->i_flushing_caps
&= ~cleaned
;
2358 spin_lock(&mdsc
->cap_dirty_lock
);
2359 if (ci
->i_flushing_caps
== 0) {
2360 list_del_init(&ci
->i_flushing_item
);
2361 if (!list_empty(&session
->s_cap_flushing
))
2362 dout(" mds%d still flushing cap on %p\n",
2364 &list_entry(session
->s_cap_flushing
.next
,
2365 struct ceph_inode_info
,
2366 i_flushing_item
)->vfs_inode
);
2367 mdsc
->num_cap_flushing
--;
2368 wake_up(&mdsc
->cap_flushing_wq
);
2369 dout(" inode %p now !flushing\n", inode
);
2371 if (ci
->i_dirty_caps
== 0) {
2372 dout(" inode %p now clean\n", inode
);
2373 BUG_ON(!list_empty(&ci
->i_dirty_item
));
2376 BUG_ON(list_empty(&ci
->i_dirty_item
));
2379 spin_unlock(&mdsc
->cap_dirty_lock
);
2380 wake_up(&ci
->i_cap_wq
);
2383 spin_unlock(&inode
->i_lock
);
2389 * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can
2390 * throw away our cap_snap.
2392 * Caller hold s_mutex.
2394 static void handle_cap_flushsnap_ack(struct inode
*inode
,
2395 struct ceph_mds_caps
*m
,
2396 struct ceph_mds_session
*session
)
2398 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2399 u64 follows
= le64_to_cpu(m
->snap_follows
);
2400 u64 flush_tid
= le64_to_cpu(m
->client_tid
);
2401 struct ceph_cap_snap
*capsnap
;
2404 dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n",
2405 inode
, ci
, session
->s_mds
, follows
);
2407 spin_lock(&inode
->i_lock
);
2408 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
2409 if (capsnap
->follows
== follows
) {
2410 if (capsnap
->flush_tid
!= flush_tid
) {
2411 dout(" cap_snap %p follows %lld tid %lld !="
2412 " %lld\n", capsnap
, follows
,
2413 flush_tid
, capsnap
->flush_tid
);
2416 WARN_ON(capsnap
->dirty_pages
|| capsnap
->writing
);
2417 dout(" removing cap_snap %p follows %lld\n",
2419 ceph_put_snap_context(capsnap
->context
);
2420 list_del(&capsnap
->ci_item
);
2421 list_del(&capsnap
->flushing_item
);
2422 ceph_put_cap_snap(capsnap
);
2426 dout(" skipping cap_snap %p follows %lld\n",
2427 capsnap
, capsnap
->follows
);
2430 spin_unlock(&inode
->i_lock
);
2436 * Handle TRUNC from MDS, indicating file truncation.
2438 * caller hold s_mutex.
2440 static void handle_cap_trunc(struct inode
*inode
,
2441 struct ceph_mds_caps
*trunc
,
2442 struct ceph_mds_session
*session
)
2443 __releases(inode
->i_lock
)
2445 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2446 int mds
= session
->s_mds
;
2447 int seq
= le32_to_cpu(trunc
->seq
);
2448 u32 truncate_seq
= le32_to_cpu(trunc
->truncate_seq
);
2449 u64 truncate_size
= le64_to_cpu(trunc
->truncate_size
);
2450 u64 size
= le64_to_cpu(trunc
->size
);
2451 int implemented
= 0;
2452 int dirty
= __ceph_caps_dirty(ci
);
2453 int issued
= __ceph_caps_issued(ceph_inode(inode
), &implemented
);
2454 int queue_trunc
= 0;
2456 issued
|= implemented
| dirty
;
2458 dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n",
2459 inode
, mds
, seq
, truncate_size
, truncate_seq
);
2460 queue_trunc
= ceph_fill_file_size(inode
, issued
,
2461 truncate_seq
, truncate_size
, size
);
2462 spin_unlock(&inode
->i_lock
);
2465 if (queue_work(ceph_client(inode
->i_sb
)->trunc_wq
,
2466 &ci
->i_vmtruncate_work
))
2471 * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a
2472 * different one. If we are the most recent migration we've seen (as
2473 * indicated by mseq), make note of the migrating cap bits for the
2474 * duration (until we see the corresponding IMPORT).
2476 * caller holds s_mutex
2478 static void handle_cap_export(struct inode
*inode
, struct ceph_mds_caps
*ex
,
2479 struct ceph_mds_session
*session
)
2481 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2482 int mds
= session
->s_mds
;
2483 unsigned mseq
= le32_to_cpu(ex
->migrate_seq
);
2484 struct ceph_cap
*cap
= NULL
, *t
;
2488 dout("handle_cap_export inode %p ci %p mds%d mseq %d\n",
2489 inode
, ci
, mds
, mseq
);
2491 spin_lock(&inode
->i_lock
);
2493 /* make sure we haven't seen a higher mseq */
2494 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
2495 t
= rb_entry(p
, struct ceph_cap
, ci_node
);
2496 if (ceph_seq_cmp(t
->mseq
, mseq
) > 0) {
2497 dout(" higher mseq on cap from mds%d\n",
2501 if (t
->session
->s_mds
== mds
)
2508 ci
->i_cap_exporting_mds
= mds
;
2509 ci
->i_cap_exporting_mseq
= mseq
;
2510 ci
->i_cap_exporting_issued
= cap
->issued
;
2512 __ceph_remove_cap(cap
, NULL
);
2517 spin_unlock(&inode
->i_lock
);
2521 * Handle cap IMPORT. If there are temp bits from an older EXPORT,
2524 * caller holds s_mutex.
2526 static void handle_cap_import(struct ceph_mds_client
*mdsc
,
2527 struct inode
*inode
, struct ceph_mds_caps
*im
,
2528 struct ceph_mds_session
*session
,
2529 void *snaptrace
, int snaptrace_len
)
2531 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2532 int mds
= session
->s_mds
;
2533 unsigned issued
= le32_to_cpu(im
->caps
);
2534 unsigned wanted
= le32_to_cpu(im
->wanted
);
2535 unsigned seq
= le32_to_cpu(im
->seq
);
2536 unsigned mseq
= le32_to_cpu(im
->migrate_seq
);
2537 u64 realmino
= le64_to_cpu(im
->realm
);
2538 u64 cap_id
= le64_to_cpu(im
->cap_id
);
2540 if (ci
->i_cap_exporting_mds
>= 0 &&
2541 ceph_seq_cmp(ci
->i_cap_exporting_mseq
, mseq
) < 0) {
2542 dout("handle_cap_import inode %p ci %p mds%d mseq %d"
2543 " - cleared exporting from mds%d\n",
2544 inode
, ci
, mds
, mseq
,
2545 ci
->i_cap_exporting_mds
);
2546 ci
->i_cap_exporting_issued
= 0;
2547 ci
->i_cap_exporting_mseq
= 0;
2548 ci
->i_cap_exporting_mds
= -1;
2550 dout("handle_cap_import inode %p ci %p mds%d mseq %d\n",
2551 inode
, ci
, mds
, mseq
);
2554 down_write(&mdsc
->snap_rwsem
);
2555 ceph_update_snap_trace(mdsc
, snaptrace
, snaptrace
+snaptrace_len
,
2557 downgrade_write(&mdsc
->snap_rwsem
);
2558 ceph_add_cap(inode
, session
, cap_id
, -1,
2559 issued
, wanted
, seq
, mseq
, realmino
, CEPH_CAP_FLAG_AUTH
,
2560 NULL
/* no caps context */);
2561 try_flush_caps(inode
, session
, NULL
);
2562 up_read(&mdsc
->snap_rwsem
);
2566 * Handle a caps message from the MDS.
2568 * Identify the appropriate session, inode, and call the right handler
2569 * based on the cap op.
2571 void ceph_handle_caps(struct ceph_mds_session
*session
,
2572 struct ceph_msg
*msg
)
2574 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
2575 struct super_block
*sb
= mdsc
->client
->sb
;
2576 struct inode
*inode
;
2577 struct ceph_cap
*cap
;
2578 struct ceph_mds_caps
*h
;
2579 int mds
= le64_to_cpu(msg
->hdr
.src
.name
.num
);
2582 struct ceph_vino vino
;
2588 dout("handle_caps from mds%d\n", mds
);
2591 if (msg
->front
.iov_len
< sizeof(*h
))
2593 h
= msg
->front
.iov_base
;
2594 op
= le32_to_cpu(h
->op
);
2595 vino
.ino
= le64_to_cpu(h
->ino
);
2596 vino
.snap
= CEPH_NOSNAP
;
2597 cap_id
= le64_to_cpu(h
->cap_id
);
2598 seq
= le32_to_cpu(h
->seq
);
2599 size
= le64_to_cpu(h
->size
);
2600 max_size
= le64_to_cpu(h
->max_size
);
2602 mutex_lock(&session
->s_mutex
);
2604 dout(" mds%d seq %lld cap seq %u\n", session
->s_mds
, session
->s_seq
,
2608 inode
= ceph_find_inode(sb
, vino
);
2609 dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op
), vino
.ino
,
2612 dout(" i don't have ino %llx\n", vino
.ino
);
2616 /* these will work even if we don't have a cap yet */
2618 case CEPH_CAP_OP_FLUSHSNAP_ACK
:
2619 handle_cap_flushsnap_ack(inode
, h
, session
);
2622 case CEPH_CAP_OP_EXPORT
:
2623 handle_cap_export(inode
, h
, session
);
2626 case CEPH_CAP_OP_IMPORT
:
2627 handle_cap_import(mdsc
, inode
, h
, session
,
2629 le32_to_cpu(h
->snap_trace_len
));
2630 check_caps
= 1; /* we may have sent a RELEASE to the old auth */
2634 /* the rest require a cap */
2635 spin_lock(&inode
->i_lock
);
2636 cap
= __get_cap_for_mds(ceph_inode(inode
), mds
);
2638 dout("no cap on %p ino %llx.%llx from mds%d, releasing\n",
2639 inode
, ceph_ino(inode
), ceph_snap(inode
), mds
);
2640 spin_unlock(&inode
->i_lock
);
2644 /* note that each of these drops i_lock for us */
2646 case CEPH_CAP_OP_REVOKE
:
2647 case CEPH_CAP_OP_GRANT
:
2648 r
= handle_cap_grant(inode
, h
, session
, cap
, msg
->middle
);
2650 ceph_check_caps(ceph_inode(inode
),
2651 CHECK_CAPS_NODELAY
|CHECK_CAPS_AUTHONLY
,
2654 ceph_check_caps(ceph_inode(inode
),
2659 case CEPH_CAP_OP_FLUSH_ACK
:
2660 handle_cap_flush_ack(inode
, h
, session
, cap
);
2663 case CEPH_CAP_OP_TRUNC
:
2664 handle_cap_trunc(inode
, h
, session
);
2668 spin_unlock(&inode
->i_lock
);
2669 pr_err("ceph_handle_caps: unknown cap op %d %s\n", op
,
2670 ceph_cap_op_name(op
));
2674 mutex_unlock(&session
->s_mutex
);
2677 ceph_check_caps(ceph_inode(inode
), CHECK_CAPS_NODELAY
, NULL
);
2683 pr_err("ceph_handle_caps: corrupt message\n");
2688 * Delayed work handler to process end of delayed cap release LRU list.
2690 void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
)
2692 struct ceph_inode_info
*ci
;
2693 int flags
= CHECK_CAPS_NODELAY
;
2695 dout("check_delayed_caps\n");
2697 spin_lock(&mdsc
->cap_delay_lock
);
2698 if (list_empty(&mdsc
->cap_delay_list
))
2700 ci
= list_first_entry(&mdsc
->cap_delay_list
,
2701 struct ceph_inode_info
,
2703 if ((ci
->i_ceph_flags
& CEPH_I_FLUSH
) == 0 &&
2704 time_before(jiffies
, ci
->i_hold_caps_max
))
2706 list_del_init(&ci
->i_cap_delay_list
);
2707 spin_unlock(&mdsc
->cap_delay_lock
);
2708 dout("check_delayed_caps on %p\n", &ci
->vfs_inode
);
2709 ceph_check_caps(ci
, flags
, NULL
);
2711 spin_unlock(&mdsc
->cap_delay_lock
);
2715 * Flush all dirty caps to the mds
2717 void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
)
2719 struct ceph_inode_info
*ci
;
2720 struct inode
*inode
;
2722 dout("flush_dirty_caps\n");
2723 spin_lock(&mdsc
->cap_dirty_lock
);
2724 while (!list_empty(&mdsc
->cap_dirty
)) {
2725 ci
= list_first_entry(&mdsc
->cap_dirty
,
2726 struct ceph_inode_info
,
2728 inode
= igrab(&ci
->vfs_inode
);
2729 spin_unlock(&mdsc
->cap_dirty_lock
);
2731 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
|CHECK_CAPS_FLUSH
,
2735 spin_lock(&mdsc
->cap_dirty_lock
);
2737 spin_unlock(&mdsc
->cap_dirty_lock
);
2741 * Drop open file reference. If we were the last open file,
2742 * we may need to release capabilities to the MDS (or schedule
2743 * their delayed release).
2745 void ceph_put_fmode(struct ceph_inode_info
*ci
, int fmode
)
2747 struct inode
*inode
= &ci
->vfs_inode
;
2750 spin_lock(&inode
->i_lock
);
2751 dout("put_fmode %p fmode %d %d -> %d\n", inode
, fmode
,
2752 ci
->i_nr_by_mode
[fmode
], ci
->i_nr_by_mode
[fmode
]-1);
2753 BUG_ON(ci
->i_nr_by_mode
[fmode
] == 0);
2754 if (--ci
->i_nr_by_mode
[fmode
] == 0)
2756 spin_unlock(&inode
->i_lock
);
2758 if (last
&& ci
->i_vino
.snap
== CEPH_NOSNAP
)
2759 ceph_check_caps(ci
, 0, NULL
);
2763 * Helpers for embedding cap and dentry lease releases into mds
2766 * @force is used by dentry_release (below) to force inclusion of a
2767 * record for the directory inode, even when there aren't any caps to
2770 int ceph_encode_inode_release(void **p
, struct inode
*inode
,
2771 int mds
, int drop
, int unless
, int force
)
2773 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2774 struct ceph_cap
*cap
;
2775 struct ceph_mds_request_release
*rel
= *p
;
2778 dout("encode_inode_release %p mds%d drop %s unless %s\n", inode
,
2779 mds
, ceph_cap_string(drop
), ceph_cap_string(unless
));
2781 spin_lock(&inode
->i_lock
);
2782 cap
= __get_cap_for_mds(ci
, mds
);
2783 if (cap
&& __cap_is_valid(cap
)) {
2785 ((cap
->issued
& drop
) &&
2786 (cap
->issued
& unless
) == 0)) {
2787 if ((cap
->issued
& drop
) &&
2788 (cap
->issued
& unless
) == 0) {
2789 dout("encode_inode_release %p cap %p %s -> "
2791 ceph_cap_string(cap
->issued
),
2792 ceph_cap_string(cap
->issued
& ~drop
));
2793 cap
->issued
&= ~drop
;
2794 cap
->implemented
&= ~drop
;
2795 if (ci
->i_ceph_flags
& CEPH_I_NODELAY
) {
2796 int wanted
= __ceph_caps_wanted(ci
);
2797 dout(" wanted %s -> %s (act %s)\n",
2798 ceph_cap_string(cap
->mds_wanted
),
2799 ceph_cap_string(cap
->mds_wanted
&
2801 ceph_cap_string(wanted
));
2802 cap
->mds_wanted
&= wanted
;
2805 dout("encode_inode_release %p cap %p %s"
2806 " (force)\n", inode
, cap
,
2807 ceph_cap_string(cap
->issued
));
2810 rel
->ino
= cpu_to_le64(ceph_ino(inode
));
2811 rel
->cap_id
= cpu_to_le64(cap
->cap_id
);
2812 rel
->seq
= cpu_to_le32(cap
->seq
);
2813 rel
->issue_seq
= cpu_to_le32(cap
->issue_seq
),
2814 rel
->mseq
= cpu_to_le32(cap
->mseq
);
2815 rel
->caps
= cpu_to_le32(cap
->issued
);
2816 rel
->wanted
= cpu_to_le32(cap
->mds_wanted
);
2822 dout("encode_inode_release %p cap %p %s\n",
2823 inode
, cap
, ceph_cap_string(cap
->issued
));
2826 spin_unlock(&inode
->i_lock
);
2830 int ceph_encode_dentry_release(void **p
, struct dentry
*dentry
,
2831 int mds
, int drop
, int unless
)
2833 struct inode
*dir
= dentry
->d_parent
->d_inode
;
2834 struct ceph_mds_request_release
*rel
= *p
;
2835 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
2840 * force an record for the directory caps if we have a dentry lease.
2841 * this is racy (can't take i_lock and d_lock together), but it
2842 * doesn't have to be perfect; the mds will revoke anything we don't
2845 spin_lock(&dentry
->d_lock
);
2846 if (di
->lease_session
&& di
->lease_session
->s_mds
== mds
)
2848 spin_unlock(&dentry
->d_lock
);
2850 ret
= ceph_encode_inode_release(p
, dir
, mds
, drop
, unless
, force
);
2852 spin_lock(&dentry
->d_lock
);
2853 if (ret
&& di
->lease_session
&& di
->lease_session
->s_mds
== mds
) {
2854 dout("encode_dentry_release %p mds%d seq %d\n",
2855 dentry
, mds
, (int)di
->lease_seq
);
2856 rel
->dname_len
= cpu_to_le32(dentry
->d_name
.len
);
2857 memcpy(*p
, dentry
->d_name
.name
, dentry
->d_name
.len
);
2858 *p
+= dentry
->d_name
.len
;
2859 rel
->dname_seq
= cpu_to_le32(di
->lease_seq
);
2861 spin_unlock(&dentry
->d_lock
);