1 #include <linux/ceph/ceph_debug.h>
4 #include <linux/kernel.h>
5 #include <linux/sched.h>
6 #include <linux/slab.h>
7 #include <linux/vmalloc.h>
8 #include <linux/wait.h>
9 #include <linux/writeback.h>
12 #include "mds_client.h"
14 #include <linux/ceph/decode.h>
15 #include <linux/ceph/messenger.h>
18 * Capability management
20 * The Ceph metadata servers control client access to inode metadata
21 * and file data by issuing capabilities, granting clients permission
22 * to read and/or write both inode field and file data to OSDs
23 * (storage nodes). Each capability consists of a set of bits
24 * indicating which operations are allowed.
26 * If the client holds a *_SHARED cap, the client has a coherent value
27 * that can be safely read from the cached inode.
29 * In the case of a *_EXCL (exclusive) or FILE_WR capabilities, the
30 * client is allowed to change inode attributes (e.g., file size,
31 * mtime), note its dirty state in the ceph_cap, and asynchronously
32 * flush that metadata change to the MDS.
34 * In the event of a conflicting operation (perhaps by another
35 * client), the MDS will revoke the conflicting client capabilities.
37 * In order for a client to cache an inode, it must hold a capability
38 * with at least one MDS server. When inodes are released, release
39 * notifications are batched and periodically sent en masse to the MDS
40 * cluster to release server state.
45 * Generate readable cap strings for debugging output.
47 #define MAX_CAP_STR 20
48 static char cap_str
[MAX_CAP_STR
][40];
49 static DEFINE_SPINLOCK(cap_str_lock
);
50 static int last_cap_str
;
52 static char *gcap_string(char *s
, int c
)
54 if (c
& CEPH_CAP_GSHARED
)
56 if (c
& CEPH_CAP_GEXCL
)
58 if (c
& CEPH_CAP_GCACHE
)
64 if (c
& CEPH_CAP_GBUFFER
)
66 if (c
& CEPH_CAP_GLAZYIO
)
71 const char *ceph_cap_string(int caps
)
77 spin_lock(&cap_str_lock
);
79 if (last_cap_str
== MAX_CAP_STR
)
81 spin_unlock(&cap_str_lock
);
85 if (caps
& CEPH_CAP_PIN
)
88 c
= (caps
>> CEPH_CAP_SAUTH
) & 3;
91 s
= gcap_string(s
, c
);
94 c
= (caps
>> CEPH_CAP_SLINK
) & 3;
97 s
= gcap_string(s
, c
);
100 c
= (caps
>> CEPH_CAP_SXATTR
) & 3;
103 s
= gcap_string(s
, c
);
106 c
= caps
>> CEPH_CAP_SFILE
;
109 s
= gcap_string(s
, c
);
118 void ceph_caps_init(struct ceph_mds_client
*mdsc
)
120 INIT_LIST_HEAD(&mdsc
->caps_list
);
121 spin_lock_init(&mdsc
->caps_list_lock
);
124 void ceph_caps_finalize(struct ceph_mds_client
*mdsc
)
126 struct ceph_cap
*cap
;
128 spin_lock(&mdsc
->caps_list_lock
);
129 while (!list_empty(&mdsc
->caps_list
)) {
130 cap
= list_first_entry(&mdsc
->caps_list
,
131 struct ceph_cap
, caps_item
);
132 list_del(&cap
->caps_item
);
133 kmem_cache_free(ceph_cap_cachep
, cap
);
135 mdsc
->caps_total_count
= 0;
136 mdsc
->caps_avail_count
= 0;
137 mdsc
->caps_use_count
= 0;
138 mdsc
->caps_reserve_count
= 0;
139 mdsc
->caps_min_count
= 0;
140 spin_unlock(&mdsc
->caps_list_lock
);
143 void ceph_adjust_min_caps(struct ceph_mds_client
*mdsc
, int delta
)
145 spin_lock(&mdsc
->caps_list_lock
);
146 mdsc
->caps_min_count
+= delta
;
147 BUG_ON(mdsc
->caps_min_count
< 0);
148 spin_unlock(&mdsc
->caps_list_lock
);
151 void ceph_reserve_caps(struct ceph_mds_client
*mdsc
,
152 struct ceph_cap_reservation
*ctx
, int need
)
155 struct ceph_cap
*cap
;
160 dout("reserve caps ctx=%p need=%d\n", ctx
, need
);
162 /* first reserve any caps that are already allocated */
163 spin_lock(&mdsc
->caps_list_lock
);
164 if (mdsc
->caps_avail_count
>= need
)
167 have
= mdsc
->caps_avail_count
;
168 mdsc
->caps_avail_count
-= have
;
169 mdsc
->caps_reserve_count
+= have
;
170 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
171 mdsc
->caps_reserve_count
+
172 mdsc
->caps_avail_count
);
173 spin_unlock(&mdsc
->caps_list_lock
);
175 for (i
= have
; i
< need
; i
++) {
176 cap
= kmem_cache_alloc(ceph_cap_cachep
, GFP_NOFS
);
179 list_add(&cap
->caps_item
, &newcaps
);
182 /* we didn't manage to reserve as much as we needed */
183 if (have
+ alloc
!= need
)
184 pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n",
185 ctx
, need
, have
+ alloc
);
187 spin_lock(&mdsc
->caps_list_lock
);
188 mdsc
->caps_total_count
+= alloc
;
189 mdsc
->caps_reserve_count
+= alloc
;
190 list_splice(&newcaps
, &mdsc
->caps_list
);
192 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
193 mdsc
->caps_reserve_count
+
194 mdsc
->caps_avail_count
);
195 spin_unlock(&mdsc
->caps_list_lock
);
198 dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n",
199 ctx
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
200 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
203 int ceph_unreserve_caps(struct ceph_mds_client
*mdsc
,
204 struct ceph_cap_reservation
*ctx
)
206 dout("unreserve caps ctx=%p count=%d\n", ctx
, ctx
->count
);
208 spin_lock(&mdsc
->caps_list_lock
);
209 BUG_ON(mdsc
->caps_reserve_count
< ctx
->count
);
210 mdsc
->caps_reserve_count
-= ctx
->count
;
211 mdsc
->caps_avail_count
+= ctx
->count
;
213 dout("unreserve caps %d = %d used + %d resv + %d avail\n",
214 mdsc
->caps_total_count
, mdsc
->caps_use_count
,
215 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
216 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
217 mdsc
->caps_reserve_count
+
218 mdsc
->caps_avail_count
);
219 spin_unlock(&mdsc
->caps_list_lock
);
224 struct ceph_cap
*ceph_get_cap(struct ceph_mds_client
*mdsc
,
225 struct ceph_cap_reservation
*ctx
)
227 struct ceph_cap
*cap
= NULL
;
229 /* temporary, until we do something about cap import/export */
231 cap
= kmem_cache_alloc(ceph_cap_cachep
, GFP_NOFS
);
233 spin_lock(&mdsc
->caps_list_lock
);
234 mdsc
->caps_use_count
++;
235 mdsc
->caps_total_count
++;
236 spin_unlock(&mdsc
->caps_list_lock
);
241 spin_lock(&mdsc
->caps_list_lock
);
242 dout("get_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n",
243 ctx
, ctx
->count
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
244 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
246 BUG_ON(ctx
->count
> mdsc
->caps_reserve_count
);
247 BUG_ON(list_empty(&mdsc
->caps_list
));
250 mdsc
->caps_reserve_count
--;
251 mdsc
->caps_use_count
++;
253 cap
= list_first_entry(&mdsc
->caps_list
, struct ceph_cap
, caps_item
);
254 list_del(&cap
->caps_item
);
256 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
257 mdsc
->caps_reserve_count
+ mdsc
->caps_avail_count
);
258 spin_unlock(&mdsc
->caps_list_lock
);
262 void ceph_put_cap(struct ceph_mds_client
*mdsc
, struct ceph_cap
*cap
)
264 spin_lock(&mdsc
->caps_list_lock
);
265 dout("put_cap %p %d = %d used + %d resv + %d avail\n",
266 cap
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
267 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
268 mdsc
->caps_use_count
--;
270 * Keep some preallocated caps around (ceph_min_count), to
271 * avoid lots of free/alloc churn.
273 if (mdsc
->caps_avail_count
>= mdsc
->caps_reserve_count
+
274 mdsc
->caps_min_count
) {
275 mdsc
->caps_total_count
--;
276 kmem_cache_free(ceph_cap_cachep
, cap
);
278 mdsc
->caps_avail_count
++;
279 list_add(&cap
->caps_item
, &mdsc
->caps_list
);
282 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
283 mdsc
->caps_reserve_count
+ mdsc
->caps_avail_count
);
284 spin_unlock(&mdsc
->caps_list_lock
);
287 void ceph_reservation_status(struct ceph_fs_client
*fsc
,
288 int *total
, int *avail
, int *used
, int *reserved
,
291 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
294 *total
= mdsc
->caps_total_count
;
296 *avail
= mdsc
->caps_avail_count
;
298 *used
= mdsc
->caps_use_count
;
300 *reserved
= mdsc
->caps_reserve_count
;
302 *min
= mdsc
->caps_min_count
;
306 * Find ceph_cap for given mds, if any.
308 * Called with i_ceph_lock held.
310 static struct ceph_cap
*__get_cap_for_mds(struct ceph_inode_info
*ci
, int mds
)
312 struct ceph_cap
*cap
;
313 struct rb_node
*n
= ci
->i_caps
.rb_node
;
316 cap
= rb_entry(n
, struct ceph_cap
, ci_node
);
319 else if (mds
> cap
->mds
)
327 struct ceph_cap
*ceph_get_cap_for_mds(struct ceph_inode_info
*ci
, int mds
)
329 struct ceph_cap
*cap
;
331 spin_lock(&ci
->i_ceph_lock
);
332 cap
= __get_cap_for_mds(ci
, mds
);
333 spin_unlock(&ci
->i_ceph_lock
);
338 * Return id of any MDS with a cap, preferably FILE_WR|BUFFER|EXCL, else -1.
340 static int __ceph_get_cap_mds(struct ceph_inode_info
*ci
)
342 struct ceph_cap
*cap
;
346 /* prefer mds with WR|BUFFER|EXCL caps */
347 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
348 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
350 if (cap
->issued
& (CEPH_CAP_FILE_WR
|
351 CEPH_CAP_FILE_BUFFER
|
358 int ceph_get_cap_mds(struct inode
*inode
)
360 struct ceph_inode_info
*ci
= ceph_inode(inode
);
362 spin_lock(&ci
->i_ceph_lock
);
363 mds
= __ceph_get_cap_mds(ceph_inode(inode
));
364 spin_unlock(&ci
->i_ceph_lock
);
369 * Called under i_ceph_lock.
371 static void __insert_cap_node(struct ceph_inode_info
*ci
,
372 struct ceph_cap
*new)
374 struct rb_node
**p
= &ci
->i_caps
.rb_node
;
375 struct rb_node
*parent
= NULL
;
376 struct ceph_cap
*cap
= NULL
;
380 cap
= rb_entry(parent
, struct ceph_cap
, ci_node
);
381 if (new->mds
< cap
->mds
)
383 else if (new->mds
> cap
->mds
)
389 rb_link_node(&new->ci_node
, parent
, p
);
390 rb_insert_color(&new->ci_node
, &ci
->i_caps
);
394 * (re)set cap hold timeouts, which control the delayed release
395 * of unused caps back to the MDS. Should be called on cap use.
397 static void __cap_set_timeouts(struct ceph_mds_client
*mdsc
,
398 struct ceph_inode_info
*ci
)
400 struct ceph_mount_options
*ma
= mdsc
->fsc
->mount_options
;
402 ci
->i_hold_caps_min
= round_jiffies(jiffies
+
403 ma
->caps_wanted_delay_min
* HZ
);
404 ci
->i_hold_caps_max
= round_jiffies(jiffies
+
405 ma
->caps_wanted_delay_max
* HZ
);
406 dout("__cap_set_timeouts %p min %lu max %lu\n", &ci
->vfs_inode
,
407 ci
->i_hold_caps_min
- jiffies
, ci
->i_hold_caps_max
- jiffies
);
411 * (Re)queue cap at the end of the delayed cap release list.
413 * If I_FLUSH is set, leave the inode at the front of the list.
415 * Caller holds i_ceph_lock
416 * -> we take mdsc->cap_delay_lock
418 static void __cap_delay_requeue(struct ceph_mds_client
*mdsc
,
419 struct ceph_inode_info
*ci
)
421 __cap_set_timeouts(mdsc
, ci
);
422 dout("__cap_delay_requeue %p flags %d at %lu\n", &ci
->vfs_inode
,
423 ci
->i_ceph_flags
, ci
->i_hold_caps_max
);
424 if (!mdsc
->stopping
) {
425 spin_lock(&mdsc
->cap_delay_lock
);
426 if (!list_empty(&ci
->i_cap_delay_list
)) {
427 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
429 list_del_init(&ci
->i_cap_delay_list
);
431 list_add_tail(&ci
->i_cap_delay_list
, &mdsc
->cap_delay_list
);
433 spin_unlock(&mdsc
->cap_delay_lock
);
438 * Queue an inode for immediate writeback. Mark inode with I_FLUSH,
439 * indicating we should send a cap message to flush dirty metadata
440 * asap, and move to the front of the delayed cap list.
442 static void __cap_delay_requeue_front(struct ceph_mds_client
*mdsc
,
443 struct ceph_inode_info
*ci
)
445 dout("__cap_delay_requeue_front %p\n", &ci
->vfs_inode
);
446 spin_lock(&mdsc
->cap_delay_lock
);
447 ci
->i_ceph_flags
|= CEPH_I_FLUSH
;
448 if (!list_empty(&ci
->i_cap_delay_list
))
449 list_del_init(&ci
->i_cap_delay_list
);
450 list_add(&ci
->i_cap_delay_list
, &mdsc
->cap_delay_list
);
451 spin_unlock(&mdsc
->cap_delay_lock
);
455 * Cancel delayed work on cap.
457 * Caller must hold i_ceph_lock.
459 static void __cap_delay_cancel(struct ceph_mds_client
*mdsc
,
460 struct ceph_inode_info
*ci
)
462 dout("__cap_delay_cancel %p\n", &ci
->vfs_inode
);
463 if (list_empty(&ci
->i_cap_delay_list
))
465 spin_lock(&mdsc
->cap_delay_lock
);
466 list_del_init(&ci
->i_cap_delay_list
);
467 spin_unlock(&mdsc
->cap_delay_lock
);
471 * Common issue checks for add_cap, handle_cap_grant.
473 static void __check_cap_issue(struct ceph_inode_info
*ci
, struct ceph_cap
*cap
,
476 unsigned had
= __ceph_caps_issued(ci
, NULL
);
479 * Each time we receive FILE_CACHE anew, we increment
482 if ((issued
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) &&
483 (had
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) == 0) {
488 * if we are newly issued FILE_SHARED, mark dir not complete; we
489 * don't know what happened to this directory while we didn't
492 if ((issued
& CEPH_CAP_FILE_SHARED
) &&
493 (had
& CEPH_CAP_FILE_SHARED
) == 0) {
495 if (S_ISDIR(ci
->vfs_inode
.i_mode
)) {
496 dout(" marking %p NOT complete\n", &ci
->vfs_inode
);
497 __ceph_dir_clear_complete(ci
);
503 * Add a capability under the given MDS session.
505 * Caller should hold session snap_rwsem (read) and s_mutex.
507 * @fmode is the open file mode, if we are opening a file, otherwise
508 * it is < 0. (This is so we can atomically add the cap and add an
509 * open file reference to it.)
511 void ceph_add_cap(struct inode
*inode
,
512 struct ceph_mds_session
*session
, u64 cap_id
,
513 int fmode
, unsigned issued
, unsigned wanted
,
514 unsigned seq
, unsigned mseq
, u64 realmino
, int flags
,
515 struct ceph_cap
**new_cap
)
517 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
518 struct ceph_inode_info
*ci
= ceph_inode(inode
);
519 struct ceph_cap
*cap
;
520 int mds
= session
->s_mds
;
523 dout("add_cap %p mds%d cap %llx %s seq %d\n", inode
,
524 session
->s_mds
, cap_id
, ceph_cap_string(issued
), seq
);
527 * If we are opening the file, include file mode wanted bits
531 wanted
|= ceph_caps_for_mode(fmode
);
533 cap
= __get_cap_for_mds(ci
, mds
);
539 cap
->implemented
= 0;
545 __insert_cap_node(ci
, cap
);
547 /* add to session cap list */
548 cap
->session
= session
;
549 spin_lock(&session
->s_cap_lock
);
550 list_add_tail(&cap
->session_caps
, &session
->s_caps
);
551 session
->s_nr_caps
++;
552 spin_unlock(&session
->s_cap_lock
);
555 * auth mds of the inode changed. we received the cap export
556 * message, but still haven't received the cap import message.
557 * handle_cap_export() updated the new auth MDS' cap.
559 * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing
560 * a message that was send before the cap import message. So
563 if (ceph_seq_cmp(seq
, cap
->seq
) <= 0) {
564 WARN_ON(cap
!= ci
->i_auth_cap
);
565 WARN_ON(cap
->cap_id
!= cap_id
);
568 issued
|= cap
->issued
;
569 flags
|= CEPH_CAP_FLAG_AUTH
;
573 if (!ci
->i_snap_realm
) {
575 * add this inode to the appropriate snap realm
577 struct ceph_snap_realm
*realm
= ceph_lookup_snap_realm(mdsc
,
580 ceph_get_snap_realm(mdsc
, realm
);
581 spin_lock(&realm
->inodes_with_caps_lock
);
582 ci
->i_snap_realm
= realm
;
583 list_add(&ci
->i_snap_realm_item
,
584 &realm
->inodes_with_caps
);
585 spin_unlock(&realm
->inodes_with_caps_lock
);
587 pr_err("ceph_add_cap: couldn't find snap realm %llx\n",
593 __check_cap_issue(ci
, cap
, issued
);
596 * If we are issued caps we don't want, or the mds' wanted
597 * value appears to be off, queue a check so we'll release
598 * later and/or update the mds wanted value.
600 actual_wanted
= __ceph_caps_wanted(ci
);
601 if ((wanted
& ~actual_wanted
) ||
602 (issued
& ~actual_wanted
& CEPH_CAP_ANY_WR
)) {
603 dout(" issued %s, mds wanted %s, actual %s, queueing\n",
604 ceph_cap_string(issued
), ceph_cap_string(wanted
),
605 ceph_cap_string(actual_wanted
));
606 __cap_delay_requeue(mdsc
, ci
);
609 if (flags
& CEPH_CAP_FLAG_AUTH
) {
610 if (ci
->i_auth_cap
== NULL
||
611 ceph_seq_cmp(ci
->i_auth_cap
->mseq
, mseq
) < 0) {
612 ci
->i_auth_cap
= cap
;
613 cap
->mds_wanted
= wanted
;
616 WARN_ON(ci
->i_auth_cap
== cap
);
619 dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n",
620 inode
, ceph_vinop(inode
), cap
, ceph_cap_string(issued
),
621 ceph_cap_string(issued
|cap
->issued
), seq
, mds
);
622 cap
->cap_id
= cap_id
;
623 cap
->issued
= issued
;
624 cap
->implemented
|= issued
;
625 if (ceph_seq_cmp(mseq
, cap
->mseq
) > 0)
626 cap
->mds_wanted
= wanted
;
628 cap
->mds_wanted
|= wanted
;
630 cap
->issue_seq
= seq
;
632 cap
->cap_gen
= session
->s_cap_gen
;
635 __ceph_get_fmode(ci
, fmode
);
639 * Return true if cap has not timed out and belongs to the current
640 * generation of the MDS session (i.e. has not gone 'stale' due to
641 * us losing touch with the mds).
643 static int __cap_is_valid(struct ceph_cap
*cap
)
648 spin_lock(&cap
->session
->s_gen_ttl_lock
);
649 gen
= cap
->session
->s_cap_gen
;
650 ttl
= cap
->session
->s_cap_ttl
;
651 spin_unlock(&cap
->session
->s_gen_ttl_lock
);
653 if (cap
->cap_gen
< gen
|| time_after_eq(jiffies
, ttl
)) {
654 dout("__cap_is_valid %p cap %p issued %s "
655 "but STALE (gen %u vs %u)\n", &cap
->ci
->vfs_inode
,
656 cap
, ceph_cap_string(cap
->issued
), cap
->cap_gen
, gen
);
664 * Return set of valid cap bits issued to us. Note that caps time
665 * out, and may be invalidated in bulk if the client session times out
666 * and session->s_cap_gen is bumped.
668 int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
)
670 int have
= ci
->i_snap_caps
;
671 struct ceph_cap
*cap
;
676 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
677 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
678 if (!__cap_is_valid(cap
))
680 dout("__ceph_caps_issued %p cap %p issued %s\n",
681 &ci
->vfs_inode
, cap
, ceph_cap_string(cap
->issued
));
684 *implemented
|= cap
->implemented
;
687 * exclude caps issued by non-auth MDS, but are been revoking
688 * by the auth MDS. The non-auth MDS should be revoking/exporting
689 * these caps, but the message is delayed.
691 if (ci
->i_auth_cap
) {
692 cap
= ci
->i_auth_cap
;
693 have
&= ~cap
->implemented
| cap
->issued
;
699 * Get cap bits issued by caps other than @ocap
701 int __ceph_caps_issued_other(struct ceph_inode_info
*ci
, struct ceph_cap
*ocap
)
703 int have
= ci
->i_snap_caps
;
704 struct ceph_cap
*cap
;
707 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
708 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
711 if (!__cap_is_valid(cap
))
719 * Move a cap to the end of the LRU (oldest caps at list head, newest
722 static void __touch_cap(struct ceph_cap
*cap
)
724 struct ceph_mds_session
*s
= cap
->session
;
726 spin_lock(&s
->s_cap_lock
);
727 if (s
->s_cap_iterator
== NULL
) {
728 dout("__touch_cap %p cap %p mds%d\n", &cap
->ci
->vfs_inode
, cap
,
730 list_move_tail(&cap
->session_caps
, &s
->s_caps
);
732 dout("__touch_cap %p cap %p mds%d NOP, iterating over caps\n",
733 &cap
->ci
->vfs_inode
, cap
, s
->s_mds
);
735 spin_unlock(&s
->s_cap_lock
);
739 * Check if we hold the given mask. If so, move the cap(s) to the
740 * front of their respective LRUs. (This is the preferred way for
741 * callers to check for caps they want.)
743 int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int touch
)
745 struct ceph_cap
*cap
;
747 int have
= ci
->i_snap_caps
;
749 if ((have
& mask
) == mask
) {
750 dout("__ceph_caps_issued_mask %p snap issued %s"
751 " (mask %s)\n", &ci
->vfs_inode
,
752 ceph_cap_string(have
),
753 ceph_cap_string(mask
));
757 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
758 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
759 if (!__cap_is_valid(cap
))
761 if ((cap
->issued
& mask
) == mask
) {
762 dout("__ceph_caps_issued_mask %p cap %p issued %s"
763 " (mask %s)\n", &ci
->vfs_inode
, cap
,
764 ceph_cap_string(cap
->issued
),
765 ceph_cap_string(mask
));
771 /* does a combination of caps satisfy mask? */
773 if ((have
& mask
) == mask
) {
774 dout("__ceph_caps_issued_mask %p combo issued %s"
775 " (mask %s)\n", &ci
->vfs_inode
,
776 ceph_cap_string(cap
->issued
),
777 ceph_cap_string(mask
));
781 /* touch this + preceding caps */
783 for (q
= rb_first(&ci
->i_caps
); q
!= p
;
785 cap
= rb_entry(q
, struct ceph_cap
,
787 if (!__cap_is_valid(cap
))
800 * Return true if mask caps are currently being revoked by an MDS.
802 int __ceph_caps_revoking_other(struct ceph_inode_info
*ci
,
803 struct ceph_cap
*ocap
, int mask
)
805 struct ceph_cap
*cap
;
808 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
809 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
811 (cap
->implemented
& ~cap
->issued
& mask
))
817 int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
)
819 struct inode
*inode
= &ci
->vfs_inode
;
822 spin_lock(&ci
->i_ceph_lock
);
823 ret
= __ceph_caps_revoking_other(ci
, NULL
, mask
);
824 spin_unlock(&ci
->i_ceph_lock
);
825 dout("ceph_caps_revoking %p %s = %d\n", inode
,
826 ceph_cap_string(mask
), ret
);
830 int __ceph_caps_used(struct ceph_inode_info
*ci
)
834 used
|= CEPH_CAP_PIN
;
836 used
|= CEPH_CAP_FILE_RD
;
837 if (ci
->i_rdcache_ref
|| ci
->vfs_inode
.i_data
.nrpages
)
838 used
|= CEPH_CAP_FILE_CACHE
;
840 used
|= CEPH_CAP_FILE_WR
;
841 if (ci
->i_wb_ref
|| ci
->i_wrbuffer_ref
)
842 used
|= CEPH_CAP_FILE_BUFFER
;
847 * wanted, by virtue of open file modes
849 int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
)
853 for (mode
= 0; mode
< CEPH_FILE_MODE_NUM
; mode
++)
854 if (ci
->i_nr_by_mode
[mode
])
855 want
|= ceph_caps_for_mode(mode
);
860 * Return caps we have registered with the MDS(s) as 'wanted'.
862 int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
)
864 struct ceph_cap
*cap
;
868 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
869 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
870 if (!__cap_is_valid(cap
))
872 if (cap
== ci
->i_auth_cap
)
873 mds_wanted
|= cap
->mds_wanted
;
875 mds_wanted
|= (cap
->mds_wanted
& ~CEPH_CAP_ANY_FILE_WR
);
881 * called under i_ceph_lock
883 static int __ceph_is_any_caps(struct ceph_inode_info
*ci
)
885 return !RB_EMPTY_ROOT(&ci
->i_caps
);
888 int ceph_is_any_caps(struct inode
*inode
)
890 struct ceph_inode_info
*ci
= ceph_inode(inode
);
893 spin_lock(&ci
->i_ceph_lock
);
894 ret
= __ceph_is_any_caps(ci
);
895 spin_unlock(&ci
->i_ceph_lock
);
901 * Remove a cap. Take steps to deal with a racing iterate_session_caps.
903 * caller should hold i_ceph_lock.
904 * caller will not hold session s_mutex if called from destroy_inode.
906 void __ceph_remove_cap(struct ceph_cap
*cap
, bool queue_release
)
908 struct ceph_mds_session
*session
= cap
->session
;
909 struct ceph_inode_info
*ci
= cap
->ci
;
910 struct ceph_mds_client
*mdsc
=
911 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
914 dout("__ceph_remove_cap %p from %p\n", cap
, &ci
->vfs_inode
);
916 /* remove from session list */
917 spin_lock(&session
->s_cap_lock
);
919 * s_cap_reconnect is protected by s_cap_lock. no one changes
920 * s_cap_gen while session is in the reconnect state.
923 (!session
->s_cap_reconnect
||
924 cap
->cap_gen
== session
->s_cap_gen
))
925 __queue_cap_release(session
, ci
->i_vino
.ino
, cap
->cap_id
,
926 cap
->mseq
, cap
->issue_seq
);
928 if (session
->s_cap_iterator
== cap
) {
929 /* not yet, we are iterating over this very cap */
930 dout("__ceph_remove_cap delaying %p removal from session %p\n",
933 list_del_init(&cap
->session_caps
);
934 session
->s_nr_caps
--;
938 /* protect backpointer with s_cap_lock: see iterate_session_caps */
940 spin_unlock(&session
->s_cap_lock
);
942 /* remove from inode list */
943 rb_erase(&cap
->ci_node
, &ci
->i_caps
);
944 if (ci
->i_auth_cap
== cap
)
945 ci
->i_auth_cap
= NULL
;
948 ceph_put_cap(mdsc
, cap
);
950 if (!__ceph_is_any_caps(ci
) && ci
->i_snap_realm
) {
951 struct ceph_snap_realm
*realm
= ci
->i_snap_realm
;
952 spin_lock(&realm
->inodes_with_caps_lock
);
953 list_del_init(&ci
->i_snap_realm_item
);
954 ci
->i_snap_realm_counter
++;
955 ci
->i_snap_realm
= NULL
;
956 spin_unlock(&realm
->inodes_with_caps_lock
);
957 ceph_put_snap_realm(mdsc
, realm
);
959 if (!__ceph_is_any_real_caps(ci
))
960 __cap_delay_cancel(mdsc
, ci
);
964 * Build and send a cap message to the given MDS.
966 * Caller should be holding s_mutex.
968 static int send_cap_msg(struct ceph_mds_session
*session
,
969 u64 ino
, u64 cid
, int op
,
970 int caps
, int wanted
, int dirty
,
971 u32 seq
, u64 flush_tid
, u32 issue_seq
, u32 mseq
,
972 u64 size
, u64 max_size
,
973 struct timespec
*mtime
, struct timespec
*atime
,
975 kuid_t uid
, kgid_t gid
, umode_t mode
,
977 struct ceph_buffer
*xattrs_buf
,
978 u64 follows
, bool inline_data
)
980 struct ceph_mds_caps
*fc
;
981 struct ceph_msg
*msg
;
985 dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s"
986 " seq %u/%u mseq %u follows %lld size %llu/%llu"
987 " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(op
),
988 cid
, ino
, ceph_cap_string(caps
), ceph_cap_string(wanted
),
989 ceph_cap_string(dirty
),
990 seq
, issue_seq
, mseq
, follows
, size
, max_size
,
991 xattr_version
, xattrs_buf
? (int)xattrs_buf
->vec
.iov_len
: 0);
993 /* flock buffer size + inline version + inline data size */
994 extra_len
= 4 + 8 + 4;
995 msg
= ceph_msg_new(CEPH_MSG_CLIENT_CAPS
, sizeof(*fc
) + extra_len
,
1000 msg
->hdr
.tid
= cpu_to_le64(flush_tid
);
1002 fc
= msg
->front
.iov_base
;
1003 memset(fc
, 0, sizeof(*fc
));
1005 fc
->cap_id
= cpu_to_le64(cid
);
1006 fc
->op
= cpu_to_le32(op
);
1007 fc
->seq
= cpu_to_le32(seq
);
1008 fc
->issue_seq
= cpu_to_le32(issue_seq
);
1009 fc
->migrate_seq
= cpu_to_le32(mseq
);
1010 fc
->caps
= cpu_to_le32(caps
);
1011 fc
->wanted
= cpu_to_le32(wanted
);
1012 fc
->dirty
= cpu_to_le32(dirty
);
1013 fc
->ino
= cpu_to_le64(ino
);
1014 fc
->snap_follows
= cpu_to_le64(follows
);
1016 fc
->size
= cpu_to_le64(size
);
1017 fc
->max_size
= cpu_to_le64(max_size
);
1019 ceph_encode_timespec(&fc
->mtime
, mtime
);
1021 ceph_encode_timespec(&fc
->atime
, atime
);
1022 fc
->time_warp_seq
= cpu_to_le32(time_warp_seq
);
1024 fc
->uid
= cpu_to_le32(from_kuid(&init_user_ns
, uid
));
1025 fc
->gid
= cpu_to_le32(from_kgid(&init_user_ns
, gid
));
1026 fc
->mode
= cpu_to_le32(mode
);
1029 /* flock buffer size */
1030 ceph_encode_32(&p
, 0);
1031 /* inline version */
1032 ceph_encode_64(&p
, inline_data
? 0 : CEPH_INLINE_NONE
);
1033 /* inline data size */
1034 ceph_encode_32(&p
, 0);
1036 fc
->xattr_version
= cpu_to_le64(xattr_version
);
1038 msg
->middle
= ceph_buffer_get(xattrs_buf
);
1039 fc
->xattr_len
= cpu_to_le32(xattrs_buf
->vec
.iov_len
);
1040 msg
->hdr
.middle_len
= cpu_to_le32(xattrs_buf
->vec
.iov_len
);
1043 ceph_con_send(&session
->s_con
, msg
);
1047 void __queue_cap_release(struct ceph_mds_session
*session
,
1048 u64 ino
, u64 cap_id
, u32 migrate_seq
,
1051 struct ceph_msg
*msg
;
1052 struct ceph_mds_cap_release
*head
;
1053 struct ceph_mds_cap_item
*item
;
1055 BUG_ON(!session
->s_num_cap_releases
);
1056 msg
= list_first_entry(&session
->s_cap_releases
,
1057 struct ceph_msg
, list_head
);
1059 dout(" adding %llx release to mds%d msg %p (%d left)\n",
1060 ino
, session
->s_mds
, msg
, session
->s_num_cap_releases
);
1062 BUG_ON(msg
->front
.iov_len
+ sizeof(*item
) > PAGE_CACHE_SIZE
);
1063 head
= msg
->front
.iov_base
;
1064 le32_add_cpu(&head
->num
, 1);
1065 item
= msg
->front
.iov_base
+ msg
->front
.iov_len
;
1066 item
->ino
= cpu_to_le64(ino
);
1067 item
->cap_id
= cpu_to_le64(cap_id
);
1068 item
->migrate_seq
= cpu_to_le32(migrate_seq
);
1069 item
->seq
= cpu_to_le32(issue_seq
);
1071 session
->s_num_cap_releases
--;
1073 msg
->front
.iov_len
+= sizeof(*item
);
1074 if (le32_to_cpu(head
->num
) == CEPH_CAPS_PER_RELEASE
) {
1075 dout(" release msg %p full\n", msg
);
1076 list_move_tail(&msg
->list_head
, &session
->s_cap_releases_done
);
1078 dout(" release msg %p at %d/%d (%d)\n", msg
,
1079 (int)le32_to_cpu(head
->num
),
1080 (int)CEPH_CAPS_PER_RELEASE
,
1081 (int)msg
->front
.iov_len
);
1086 * Queue cap releases when an inode is dropped from our cache. Since
1087 * inode is about to be destroyed, there is no need for i_ceph_lock.
1089 void ceph_queue_caps_release(struct inode
*inode
)
1091 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1094 p
= rb_first(&ci
->i_caps
);
1096 struct ceph_cap
*cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1098 __ceph_remove_cap(cap
, true);
1103 * Send a cap msg on the given inode. Update our caps state, then
1104 * drop i_ceph_lock and send the message.
1106 * Make note of max_size reported/requested from mds, revoked caps
1107 * that have now been implemented.
1109 * Make half-hearted attempt ot to invalidate page cache if we are
1110 * dropping RDCACHE. Note that this will leave behind locked pages
1111 * that we'll then need to deal with elsewhere.
1113 * Return non-zero if delayed release, or we experienced an error
1114 * such that the caller should requeue + retry later.
1116 * called with i_ceph_lock, then drops it.
1117 * caller should hold snap_rwsem (read), s_mutex.
1119 static int __send_cap(struct ceph_mds_client
*mdsc
, struct ceph_cap
*cap
,
1120 int op
, int used
, int want
, int retain
, int flushing
,
1121 unsigned *pflush_tid
)
1122 __releases(cap
->ci
->i_ceph_lock
)
1124 struct ceph_inode_info
*ci
= cap
->ci
;
1125 struct inode
*inode
= &ci
->vfs_inode
;
1126 u64 cap_id
= cap
->cap_id
;
1127 int held
, revoking
, dropping
, keep
;
1128 u64 seq
, issue_seq
, mseq
, time_warp_seq
, follows
;
1130 struct timespec mtime
, atime
;
1135 struct ceph_mds_session
*session
;
1136 u64 xattr_version
= 0;
1137 struct ceph_buffer
*xattr_blob
= NULL
;
1144 held
= cap
->issued
| cap
->implemented
;
1145 revoking
= cap
->implemented
& ~cap
->issued
;
1146 retain
&= ~revoking
;
1147 dropping
= cap
->issued
& ~retain
;
1149 dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n",
1150 inode
, cap
, cap
->session
,
1151 ceph_cap_string(held
), ceph_cap_string(held
& retain
),
1152 ceph_cap_string(revoking
));
1153 BUG_ON((retain
& CEPH_CAP_PIN
) == 0);
1155 session
= cap
->session
;
1157 /* don't release wanted unless we've waited a bit. */
1158 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0 &&
1159 time_before(jiffies
, ci
->i_hold_caps_min
)) {
1160 dout(" delaying issued %s -> %s, wanted %s -> %s on send\n",
1161 ceph_cap_string(cap
->issued
),
1162 ceph_cap_string(cap
->issued
& retain
),
1163 ceph_cap_string(cap
->mds_wanted
),
1164 ceph_cap_string(want
));
1165 want
|= cap
->mds_wanted
;
1166 retain
|= cap
->issued
;
1169 ci
->i_ceph_flags
&= ~(CEPH_I_NODELAY
| CEPH_I_FLUSH
);
1171 cap
->issued
&= retain
; /* drop bits we don't want */
1172 if (cap
->implemented
& ~cap
->issued
) {
1174 * Wake up any waiters on wanted -> needed transition.
1175 * This is due to the weird transition from buffered
1176 * to sync IO... we need to flush dirty pages _before_
1177 * allowing sync writes to avoid reordering.
1181 cap
->implemented
&= cap
->issued
| used
;
1182 cap
->mds_wanted
= want
;
1186 * assign a tid for flush operations so we can avoid
1187 * flush1 -> dirty1 -> flush2 -> flushack1 -> mark
1188 * clean type races. track latest tid for every bit
1189 * so we can handle flush AxFw, flush Fw, and have the
1190 * first ack clean Ax.
1192 flush_tid
= ++ci
->i_cap_flush_last_tid
;
1194 *pflush_tid
= flush_tid
;
1195 dout(" cap_flush_tid %d\n", (int)flush_tid
);
1196 for (i
= 0; i
< CEPH_CAP_BITS
; i
++)
1197 if (flushing
& (1 << i
))
1198 ci
->i_cap_flush_tid
[i
] = flush_tid
;
1200 follows
= ci
->i_head_snapc
->seq
;
1205 keep
= cap
->implemented
;
1207 issue_seq
= cap
->issue_seq
;
1209 size
= inode
->i_size
;
1210 ci
->i_reported_size
= size
;
1211 max_size
= ci
->i_wanted_max_size
;
1212 ci
->i_requested_max_size
= max_size
;
1213 mtime
= inode
->i_mtime
;
1214 atime
= inode
->i_atime
;
1215 time_warp_seq
= ci
->i_time_warp_seq
;
1218 mode
= inode
->i_mode
;
1220 if (flushing
& CEPH_CAP_XATTR_EXCL
) {
1221 __ceph_build_xattrs_blob(ci
);
1222 xattr_blob
= ci
->i_xattrs
.blob
;
1223 xattr_version
= ci
->i_xattrs
.version
;
1226 inline_data
= ci
->i_inline_version
!= CEPH_INLINE_NONE
;
1228 spin_unlock(&ci
->i_ceph_lock
);
1230 ret
= send_cap_msg(session
, ceph_vino(inode
).ino
, cap_id
,
1231 op
, keep
, want
, flushing
, seq
, flush_tid
, issue_seq
, mseq
,
1232 size
, max_size
, &mtime
, &atime
, time_warp_seq
,
1233 uid
, gid
, mode
, xattr_version
, xattr_blob
,
1234 follows
, inline_data
);
1236 dout("error sending cap msg, must requeue %p\n", inode
);
1241 wake_up_all(&ci
->i_cap_wq
);
1247 * When a snapshot is taken, clients accumulate dirty metadata on
1248 * inodes with capabilities in ceph_cap_snaps to describe the file
1249 * state at the time the snapshot was taken. This must be flushed
1250 * asynchronously back to the MDS once sync writes complete and dirty
1251 * data is written out.
1253 * Unless @again is true, skip cap_snaps that were already sent to
1254 * the MDS (i.e., during this session).
1256 * Called under i_ceph_lock. Takes s_mutex as needed.
1258 void __ceph_flush_snaps(struct ceph_inode_info
*ci
,
1259 struct ceph_mds_session
**psession
,
1261 __releases(ci
->i_ceph_lock
)
1262 __acquires(ci
->i_ceph_lock
)
1264 struct inode
*inode
= &ci
->vfs_inode
;
1266 struct ceph_cap_snap
*capsnap
;
1268 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
1269 struct ceph_mds_session
*session
= NULL
; /* if session != NULL, we hold
1271 u64 next_follows
= 0; /* keep track of how far we've gotten through the
1272 i_cap_snaps list, and skip these entries next time
1273 around to avoid an infinite loop */
1276 session
= *psession
;
1278 dout("__flush_snaps %p\n", inode
);
1280 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
1281 /* avoid an infiniute loop after retry */
1282 if (capsnap
->follows
< next_follows
)
1285 * we need to wait for sync writes to complete and for dirty
1286 * pages to be written out.
1288 if (capsnap
->dirty_pages
|| capsnap
->writing
)
1292 * if cap writeback already occurred, we should have dropped
1293 * the capsnap in ceph_put_wrbuffer_cap_refs.
1295 BUG_ON(capsnap
->dirty
== 0);
1297 /* pick mds, take s_mutex */
1298 if (ci
->i_auth_cap
== NULL
) {
1299 dout("no auth cap (migrating?), doing nothing\n");
1303 /* only flush each capsnap once */
1304 if (!again
&& !list_empty(&capsnap
->flushing_item
)) {
1305 dout("already flushed %p, skipping\n", capsnap
);
1309 mds
= ci
->i_auth_cap
->session
->s_mds
;
1310 mseq
= ci
->i_auth_cap
->mseq
;
1312 if (session
&& session
->s_mds
!= mds
) {
1313 dout("oops, wrong session %p mutex\n", session
);
1314 mutex_unlock(&session
->s_mutex
);
1315 ceph_put_mds_session(session
);
1319 spin_unlock(&ci
->i_ceph_lock
);
1320 mutex_lock(&mdsc
->mutex
);
1321 session
= __ceph_lookup_mds_session(mdsc
, mds
);
1322 mutex_unlock(&mdsc
->mutex
);
1324 dout("inverting session/ino locks on %p\n",
1326 mutex_lock(&session
->s_mutex
);
1329 * if session == NULL, we raced against a cap
1330 * deletion or migration. retry, and we'll
1331 * get a better @mds value next time.
1333 spin_lock(&ci
->i_ceph_lock
);
1337 capsnap
->flush_tid
= ++ci
->i_cap_flush_last_tid
;
1338 atomic_inc(&capsnap
->nref
);
1339 if (!list_empty(&capsnap
->flushing_item
))
1340 list_del_init(&capsnap
->flushing_item
);
1341 list_add_tail(&capsnap
->flushing_item
,
1342 &session
->s_cap_snaps_flushing
);
1343 spin_unlock(&ci
->i_ceph_lock
);
1345 dout("flush_snaps %p cap_snap %p follows %lld tid %llu\n",
1346 inode
, capsnap
, capsnap
->follows
, capsnap
->flush_tid
);
1347 send_cap_msg(session
, ceph_vino(inode
).ino
, 0,
1348 CEPH_CAP_OP_FLUSHSNAP
, capsnap
->issued
, 0,
1349 capsnap
->dirty
, 0, capsnap
->flush_tid
, 0, mseq
,
1351 &capsnap
->mtime
, &capsnap
->atime
,
1352 capsnap
->time_warp_seq
,
1353 capsnap
->uid
, capsnap
->gid
, capsnap
->mode
,
1354 capsnap
->xattr_version
, capsnap
->xattr_blob
,
1355 capsnap
->follows
, capsnap
->inline_data
);
1357 next_follows
= capsnap
->follows
+ 1;
1358 ceph_put_cap_snap(capsnap
);
1360 spin_lock(&ci
->i_ceph_lock
);
1364 /* we flushed them all; remove this inode from the queue */
1365 spin_lock(&mdsc
->snap_flush_lock
);
1366 list_del_init(&ci
->i_snap_flush_item
);
1367 spin_unlock(&mdsc
->snap_flush_lock
);
1371 *psession
= session
;
1373 mutex_unlock(&session
->s_mutex
);
1374 ceph_put_mds_session(session
);
1378 static void ceph_flush_snaps(struct ceph_inode_info
*ci
)
1380 spin_lock(&ci
->i_ceph_lock
);
1381 __ceph_flush_snaps(ci
, NULL
, 0);
1382 spin_unlock(&ci
->i_ceph_lock
);
1386 * Mark caps dirty. If inode is newly dirty, return the dirty flags.
1387 * Caller is then responsible for calling __mark_inode_dirty with the
1388 * returned flags value.
1390 int __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
)
1392 struct ceph_mds_client
*mdsc
=
1393 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
1394 struct inode
*inode
= &ci
->vfs_inode
;
1395 int was
= ci
->i_dirty_caps
;
1398 dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci
->vfs_inode
,
1399 ceph_cap_string(mask
), ceph_cap_string(was
),
1400 ceph_cap_string(was
| mask
));
1401 ci
->i_dirty_caps
|= mask
;
1403 if (!ci
->i_head_snapc
)
1404 ci
->i_head_snapc
= ceph_get_snap_context(
1405 ci
->i_snap_realm
->cached_context
);
1406 dout(" inode %p now dirty snapc %p auth cap %p\n",
1407 &ci
->vfs_inode
, ci
->i_head_snapc
, ci
->i_auth_cap
);
1408 WARN_ON(!ci
->i_auth_cap
);
1409 BUG_ON(!list_empty(&ci
->i_dirty_item
));
1410 spin_lock(&mdsc
->cap_dirty_lock
);
1411 list_add(&ci
->i_dirty_item
, &mdsc
->cap_dirty
);
1412 spin_unlock(&mdsc
->cap_dirty_lock
);
1413 if (ci
->i_flushing_caps
== 0) {
1415 dirty
|= I_DIRTY_SYNC
;
1418 BUG_ON(list_empty(&ci
->i_dirty_item
));
1419 if (((was
| ci
->i_flushing_caps
) & CEPH_CAP_FILE_BUFFER
) &&
1420 (mask
& CEPH_CAP_FILE_BUFFER
))
1421 dirty
|= I_DIRTY_DATASYNC
;
1422 __cap_delay_requeue(mdsc
, ci
);
1427 * Add dirty inode to the flushing list. Assigned a seq number so we
1428 * can wait for caps to flush without starving.
1430 * Called under i_ceph_lock.
1432 static int __mark_caps_flushing(struct inode
*inode
,
1433 struct ceph_mds_session
*session
)
1435 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
1436 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1439 BUG_ON(ci
->i_dirty_caps
== 0);
1440 BUG_ON(list_empty(&ci
->i_dirty_item
));
1442 flushing
= ci
->i_dirty_caps
;
1443 dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n",
1444 ceph_cap_string(flushing
),
1445 ceph_cap_string(ci
->i_flushing_caps
),
1446 ceph_cap_string(ci
->i_flushing_caps
| flushing
));
1447 ci
->i_flushing_caps
|= flushing
;
1448 ci
->i_dirty_caps
= 0;
1449 dout(" inode %p now !dirty\n", inode
);
1451 spin_lock(&mdsc
->cap_dirty_lock
);
1452 list_del_init(&ci
->i_dirty_item
);
1454 ci
->i_cap_flush_seq
= ++mdsc
->cap_flush_seq
;
1455 if (list_empty(&ci
->i_flushing_item
)) {
1456 list_add_tail(&ci
->i_flushing_item
, &session
->s_cap_flushing
);
1457 mdsc
->num_cap_flushing
++;
1458 dout(" inode %p now flushing seq %lld\n", inode
,
1459 ci
->i_cap_flush_seq
);
1461 list_move_tail(&ci
->i_flushing_item
, &session
->s_cap_flushing
);
1462 dout(" inode %p now flushing (more) seq %lld\n", inode
,
1463 ci
->i_cap_flush_seq
);
1465 spin_unlock(&mdsc
->cap_dirty_lock
);
1471 * try to invalidate mapping pages without blocking.
1473 static int try_nonblocking_invalidate(struct inode
*inode
)
1475 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1476 u32 invalidating_gen
= ci
->i_rdcache_gen
;
1478 spin_unlock(&ci
->i_ceph_lock
);
1479 invalidate_mapping_pages(&inode
->i_data
, 0, -1);
1480 spin_lock(&ci
->i_ceph_lock
);
1482 if (inode
->i_data
.nrpages
== 0 &&
1483 invalidating_gen
== ci
->i_rdcache_gen
) {
1485 dout("try_nonblocking_invalidate %p success\n", inode
);
1486 /* save any racing async invalidate some trouble */
1487 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
- 1;
1490 dout("try_nonblocking_invalidate %p failed\n", inode
);
1495 * Swiss army knife function to examine currently used and wanted
1496 * versus held caps. Release, flush, ack revoked caps to mds as
1499 * CHECK_CAPS_NODELAY - caller is delayed work and we should not delay
1500 * cap release further.
1501 * CHECK_CAPS_AUTHONLY - we should only check the auth cap
1502 * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without
1505 void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
1506 struct ceph_mds_session
*session
)
1508 struct ceph_fs_client
*fsc
= ceph_inode_to_client(&ci
->vfs_inode
);
1509 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
1510 struct inode
*inode
= &ci
->vfs_inode
;
1511 struct ceph_cap
*cap
;
1512 int file_wanted
, used
, cap_used
;
1513 int took_snap_rwsem
= 0; /* true if mdsc->snap_rwsem held */
1514 int issued
, implemented
, want
, retain
, revoking
, flushing
= 0;
1515 int mds
= -1; /* keep track of how far we've gone through i_caps list
1516 to avoid an infinite loop on retry */
1518 int tried_invalidate
= 0;
1519 int delayed
= 0, sent
= 0, force_requeue
= 0, num
;
1520 int queue_invalidate
= 0;
1521 int is_delayed
= flags
& CHECK_CAPS_NODELAY
;
1523 /* if we are unmounting, flush any unused caps immediately. */
1527 spin_lock(&ci
->i_ceph_lock
);
1529 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
1530 flags
|= CHECK_CAPS_FLUSH
;
1532 /* flush snaps first time around only */
1533 if (!list_empty(&ci
->i_cap_snaps
))
1534 __ceph_flush_snaps(ci
, &session
, 0);
1537 spin_lock(&ci
->i_ceph_lock
);
1539 file_wanted
= __ceph_caps_file_wanted(ci
);
1540 used
= __ceph_caps_used(ci
);
1541 want
= file_wanted
| used
;
1542 issued
= __ceph_caps_issued(ci
, &implemented
);
1543 revoking
= implemented
& ~issued
;
1545 retain
= want
| CEPH_CAP_PIN
;
1546 if (!mdsc
->stopping
&& inode
->i_nlink
> 0) {
1548 retain
|= CEPH_CAP_ANY
; /* be greedy */
1550 retain
|= CEPH_CAP_ANY_SHARED
;
1552 * keep RD only if we didn't have the file open RW,
1553 * because then the mds would revoke it anyway to
1554 * journal max_size=0.
1556 if (ci
->i_max_size
== 0)
1557 retain
|= CEPH_CAP_ANY_RD
;
1561 dout("check_caps %p file_want %s used %s dirty %s flushing %s"
1562 " issued %s revoking %s retain %s %s%s%s\n", inode
,
1563 ceph_cap_string(file_wanted
),
1564 ceph_cap_string(used
), ceph_cap_string(ci
->i_dirty_caps
),
1565 ceph_cap_string(ci
->i_flushing_caps
),
1566 ceph_cap_string(issued
), ceph_cap_string(revoking
),
1567 ceph_cap_string(retain
),
1568 (flags
& CHECK_CAPS_AUTHONLY
) ? " AUTHONLY" : "",
1569 (flags
& CHECK_CAPS_NODELAY
) ? " NODELAY" : "",
1570 (flags
& CHECK_CAPS_FLUSH
) ? " FLUSH" : "");
1573 * If we no longer need to hold onto old our caps, and we may
1574 * have cached pages, but don't want them, then try to invalidate.
1575 * If we fail, it's because pages are locked.... try again later.
1577 if ((!is_delayed
|| mdsc
->stopping
) &&
1578 ci
->i_wrbuffer_ref
== 0 && /* no dirty pages... */
1579 inode
->i_data
.nrpages
&& /* have cached pages */
1580 (file_wanted
== 0 || /* no open files */
1581 (revoking
& (CEPH_CAP_FILE_CACHE
|
1582 CEPH_CAP_FILE_LAZYIO
))) && /* or revoking cache */
1583 !tried_invalidate
) {
1584 dout("check_caps trying to invalidate on %p\n", inode
);
1585 if (try_nonblocking_invalidate(inode
) < 0) {
1586 if (revoking
& (CEPH_CAP_FILE_CACHE
|
1587 CEPH_CAP_FILE_LAZYIO
)) {
1588 dout("check_caps queuing invalidate\n");
1589 queue_invalidate
= 1;
1590 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
1592 dout("check_caps failed to invalidate pages\n");
1593 /* we failed to invalidate pages. check these
1594 caps again later. */
1596 __cap_set_timeouts(mdsc
, ci
);
1599 tried_invalidate
= 1;
1604 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
1605 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1608 /* avoid looping forever */
1609 if (mds
>= cap
->mds
||
1610 ((flags
& CHECK_CAPS_AUTHONLY
) && cap
!= ci
->i_auth_cap
))
1613 /* NOTE: no side-effects allowed, until we take s_mutex */
1616 if (ci
->i_auth_cap
&& cap
!= ci
->i_auth_cap
)
1617 cap_used
&= ~ci
->i_auth_cap
->issued
;
1619 revoking
= cap
->implemented
& ~cap
->issued
;
1620 dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n",
1621 cap
->mds
, cap
, ceph_cap_string(cap
->issued
),
1622 ceph_cap_string(cap_used
),
1623 ceph_cap_string(cap
->implemented
),
1624 ceph_cap_string(revoking
));
1626 if (cap
== ci
->i_auth_cap
&&
1627 (cap
->issued
& CEPH_CAP_FILE_WR
)) {
1628 /* request larger max_size from MDS? */
1629 if (ci
->i_wanted_max_size
> ci
->i_max_size
&&
1630 ci
->i_wanted_max_size
> ci
->i_requested_max_size
) {
1631 dout("requesting new max_size\n");
1635 /* approaching file_max? */
1636 if ((inode
->i_size
<< 1) >= ci
->i_max_size
&&
1637 (ci
->i_reported_size
<< 1) < ci
->i_max_size
) {
1638 dout("i_size approaching max_size\n");
1642 /* flush anything dirty? */
1643 if (cap
== ci
->i_auth_cap
&& (flags
& CHECK_CAPS_FLUSH
) &&
1645 dout("flushing dirty caps\n");
1649 /* completed revocation? going down and there are no caps? */
1650 if (revoking
&& (revoking
& cap_used
) == 0) {
1651 dout("completed revocation of %s\n",
1652 ceph_cap_string(cap
->implemented
& ~cap
->issued
));
1656 /* want more caps from mds? */
1657 if (want
& ~(cap
->mds_wanted
| cap
->issued
))
1660 /* things we might delay */
1661 if ((cap
->issued
& ~retain
) == 0 &&
1662 cap
->mds_wanted
== want
)
1663 continue; /* nope, all good */
1669 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0 &&
1670 time_before(jiffies
, ci
->i_hold_caps_max
)) {
1671 dout(" delaying issued %s -> %s, wanted %s -> %s\n",
1672 ceph_cap_string(cap
->issued
),
1673 ceph_cap_string(cap
->issued
& retain
),
1674 ceph_cap_string(cap
->mds_wanted
),
1675 ceph_cap_string(want
));
1681 if (ci
->i_ceph_flags
& CEPH_I_NOFLUSH
) {
1682 dout(" skipping %p I_NOFLUSH set\n", inode
);
1686 if (session
&& session
!= cap
->session
) {
1687 dout("oops, wrong session %p mutex\n", session
);
1688 mutex_unlock(&session
->s_mutex
);
1692 session
= cap
->session
;
1693 if (mutex_trylock(&session
->s_mutex
) == 0) {
1694 dout("inverting session/ino locks on %p\n",
1696 spin_unlock(&ci
->i_ceph_lock
);
1697 if (took_snap_rwsem
) {
1698 up_read(&mdsc
->snap_rwsem
);
1699 took_snap_rwsem
= 0;
1701 mutex_lock(&session
->s_mutex
);
1705 /* take snap_rwsem after session mutex */
1706 if (!took_snap_rwsem
) {
1707 if (down_read_trylock(&mdsc
->snap_rwsem
) == 0) {
1708 dout("inverting snap/in locks on %p\n",
1710 spin_unlock(&ci
->i_ceph_lock
);
1711 down_read(&mdsc
->snap_rwsem
);
1712 took_snap_rwsem
= 1;
1715 took_snap_rwsem
= 1;
1718 if (cap
== ci
->i_auth_cap
&& ci
->i_dirty_caps
)
1719 flushing
= __mark_caps_flushing(inode
, session
);
1723 mds
= cap
->mds
; /* remember mds, so we don't repeat */
1726 /* __send_cap drops i_ceph_lock */
1727 delayed
+= __send_cap(mdsc
, cap
, CEPH_CAP_OP_UPDATE
, cap_used
,
1728 want
, retain
, flushing
, NULL
);
1729 goto retry
; /* retake i_ceph_lock and restart our cap scan. */
1733 * Reschedule delayed caps release if we delayed anything,
1736 if (delayed
&& is_delayed
)
1737 force_requeue
= 1; /* __send_cap delayed release; requeue */
1738 if (!delayed
&& !is_delayed
)
1739 __cap_delay_cancel(mdsc
, ci
);
1740 else if (!is_delayed
|| force_requeue
)
1741 __cap_delay_requeue(mdsc
, ci
);
1743 spin_unlock(&ci
->i_ceph_lock
);
1745 if (queue_invalidate
)
1746 ceph_queue_invalidate(inode
);
1749 mutex_unlock(&session
->s_mutex
);
1750 if (took_snap_rwsem
)
1751 up_read(&mdsc
->snap_rwsem
);
1755 * Try to flush dirty caps back to the auth mds.
1757 static int try_flush_caps(struct inode
*inode
, unsigned *flush_tid
)
1759 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
1760 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1762 struct ceph_mds_session
*session
= NULL
;
1765 spin_lock(&ci
->i_ceph_lock
);
1766 if (ci
->i_ceph_flags
& CEPH_I_NOFLUSH
) {
1767 dout("try_flush_caps skipping %p I_NOFLUSH set\n", inode
);
1770 if (ci
->i_dirty_caps
&& ci
->i_auth_cap
) {
1771 struct ceph_cap
*cap
= ci
->i_auth_cap
;
1772 int used
= __ceph_caps_used(ci
);
1773 int want
= __ceph_caps_wanted(ci
);
1776 if (!session
|| session
!= cap
->session
) {
1777 spin_unlock(&ci
->i_ceph_lock
);
1779 mutex_unlock(&session
->s_mutex
);
1780 session
= cap
->session
;
1781 mutex_lock(&session
->s_mutex
);
1784 if (cap
->session
->s_state
< CEPH_MDS_SESSION_OPEN
)
1787 flushing
= __mark_caps_flushing(inode
, session
);
1789 /* __send_cap drops i_ceph_lock */
1790 delayed
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
, used
, want
,
1791 cap
->issued
| cap
->implemented
, flushing
,
1796 spin_lock(&ci
->i_ceph_lock
);
1797 __cap_delay_requeue(mdsc
, ci
);
1800 spin_unlock(&ci
->i_ceph_lock
);
1803 mutex_unlock(&session
->s_mutex
);
1808 * Return true if we've flushed caps through the given flush_tid.
1810 static int caps_are_flushed(struct inode
*inode
, unsigned tid
)
1812 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1815 spin_lock(&ci
->i_ceph_lock
);
1816 for (i
= 0; i
< CEPH_CAP_BITS
; i
++)
1817 if ((ci
->i_flushing_caps
& (1 << i
)) &&
1818 ci
->i_cap_flush_tid
[i
] <= tid
) {
1819 /* still flushing this bit */
1823 spin_unlock(&ci
->i_ceph_lock
);
1828 * Wait on any unsafe replies for the given inode. First wait on the
1829 * newest request, and make that the upper bound. Then, if there are
1830 * more requests, keep waiting on the oldest as long as it is still older
1831 * than the original request.
1833 static void sync_write_wait(struct inode
*inode
)
1835 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1836 struct list_head
*head
= &ci
->i_unsafe_writes
;
1837 struct ceph_osd_request
*req
;
1840 spin_lock(&ci
->i_unsafe_lock
);
1841 if (list_empty(head
))
1844 /* set upper bound as _last_ entry in chain */
1845 req
= list_entry(head
->prev
, struct ceph_osd_request
,
1847 last_tid
= req
->r_tid
;
1850 ceph_osdc_get_request(req
);
1851 spin_unlock(&ci
->i_unsafe_lock
);
1852 dout("sync_write_wait on tid %llu (until %llu)\n",
1853 req
->r_tid
, last_tid
);
1854 wait_for_completion(&req
->r_safe_completion
);
1855 spin_lock(&ci
->i_unsafe_lock
);
1856 ceph_osdc_put_request(req
);
1859 * from here on look at first entry in chain, since we
1860 * only want to wait for anything older than last_tid
1862 if (list_empty(head
))
1864 req
= list_entry(head
->next
, struct ceph_osd_request
,
1866 } while (req
->r_tid
< last_tid
);
1868 spin_unlock(&ci
->i_unsafe_lock
);
1871 int ceph_fsync(struct file
*file
, loff_t start
, loff_t end
, int datasync
)
1873 struct inode
*inode
= file
->f_mapping
->host
;
1874 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1879 dout("fsync %p%s\n", inode
, datasync
? " datasync" : "");
1880 sync_write_wait(inode
);
1882 ret
= filemap_write_and_wait_range(inode
->i_mapping
, start
, end
);
1885 mutex_lock(&inode
->i_mutex
);
1887 dirty
= try_flush_caps(inode
, &flush_tid
);
1888 dout("fsync dirty caps are %s\n", ceph_cap_string(dirty
));
1891 * only wait on non-file metadata writeback (the mds
1892 * can recover size and mtime, so we don't need to
1895 if (!datasync
&& (dirty
& ~CEPH_CAP_ANY_FILE_WR
)) {
1896 dout("fsync waiting for flush_tid %u\n", flush_tid
);
1897 ret
= wait_event_interruptible(ci
->i_cap_wq
,
1898 caps_are_flushed(inode
, flush_tid
));
1901 dout("fsync %p%s done\n", inode
, datasync
? " datasync" : "");
1902 mutex_unlock(&inode
->i_mutex
);
1907 * Flush any dirty caps back to the mds. If we aren't asked to wait,
1908 * queue inode for flush but don't do so immediately, because we can
1909 * get by with fewer MDS messages if we wait for data writeback to
1912 int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
)
1914 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1918 int wait
= wbc
->sync_mode
== WB_SYNC_ALL
;
1920 dout("write_inode %p wait=%d\n", inode
, wait
);
1922 dirty
= try_flush_caps(inode
, &flush_tid
);
1924 err
= wait_event_interruptible(ci
->i_cap_wq
,
1925 caps_are_flushed(inode
, flush_tid
));
1927 struct ceph_mds_client
*mdsc
=
1928 ceph_sb_to_client(inode
->i_sb
)->mdsc
;
1930 spin_lock(&ci
->i_ceph_lock
);
1931 if (__ceph_caps_dirty(ci
))
1932 __cap_delay_requeue_front(mdsc
, ci
);
1933 spin_unlock(&ci
->i_ceph_lock
);
1939 * After a recovering MDS goes active, we need to resend any caps
1942 * Caller holds session->s_mutex.
1944 static void kick_flushing_capsnaps(struct ceph_mds_client
*mdsc
,
1945 struct ceph_mds_session
*session
)
1947 struct ceph_cap_snap
*capsnap
;
1949 dout("kick_flushing_capsnaps mds%d\n", session
->s_mds
);
1950 list_for_each_entry(capsnap
, &session
->s_cap_snaps_flushing
,
1952 struct ceph_inode_info
*ci
= capsnap
->ci
;
1953 struct inode
*inode
= &ci
->vfs_inode
;
1954 struct ceph_cap
*cap
;
1956 spin_lock(&ci
->i_ceph_lock
);
1957 cap
= ci
->i_auth_cap
;
1958 if (cap
&& cap
->session
== session
) {
1959 dout("kick_flushing_caps %p cap %p capsnap %p\n", inode
,
1961 __ceph_flush_snaps(ci
, &session
, 1);
1963 pr_err("%p auth cap %p not mds%d ???\n", inode
,
1964 cap
, session
->s_mds
);
1966 spin_unlock(&ci
->i_ceph_lock
);
1970 void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
1971 struct ceph_mds_session
*session
)
1973 struct ceph_inode_info
*ci
;
1975 kick_flushing_capsnaps(mdsc
, session
);
1977 dout("kick_flushing_caps mds%d\n", session
->s_mds
);
1978 list_for_each_entry(ci
, &session
->s_cap_flushing
, i_flushing_item
) {
1979 struct inode
*inode
= &ci
->vfs_inode
;
1980 struct ceph_cap
*cap
;
1983 spin_lock(&ci
->i_ceph_lock
);
1984 cap
= ci
->i_auth_cap
;
1985 if (cap
&& cap
->session
== session
) {
1986 dout("kick_flushing_caps %p cap %p %s\n", inode
,
1987 cap
, ceph_cap_string(ci
->i_flushing_caps
));
1988 delayed
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
,
1989 __ceph_caps_used(ci
),
1990 __ceph_caps_wanted(ci
),
1991 cap
->issued
| cap
->implemented
,
1992 ci
->i_flushing_caps
, NULL
);
1994 spin_lock(&ci
->i_ceph_lock
);
1995 __cap_delay_requeue(mdsc
, ci
);
1996 spin_unlock(&ci
->i_ceph_lock
);
1999 pr_err("%p auth cap %p not mds%d ???\n", inode
,
2000 cap
, session
->s_mds
);
2001 spin_unlock(&ci
->i_ceph_lock
);
2006 static void kick_flushing_inode_caps(struct ceph_mds_client
*mdsc
,
2007 struct ceph_mds_session
*session
,
2008 struct inode
*inode
)
2010 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2011 struct ceph_cap
*cap
;
2014 spin_lock(&ci
->i_ceph_lock
);
2015 cap
= ci
->i_auth_cap
;
2016 dout("kick_flushing_inode_caps %p flushing %s flush_seq %lld\n", inode
,
2017 ceph_cap_string(ci
->i_flushing_caps
), ci
->i_cap_flush_seq
);
2019 __ceph_flush_snaps(ci
, &session
, 1);
2021 if (ci
->i_flushing_caps
) {
2022 spin_lock(&mdsc
->cap_dirty_lock
);
2023 list_move_tail(&ci
->i_flushing_item
,
2024 &cap
->session
->s_cap_flushing
);
2025 spin_unlock(&mdsc
->cap_dirty_lock
);
2027 delayed
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
,
2028 __ceph_caps_used(ci
),
2029 __ceph_caps_wanted(ci
),
2030 cap
->issued
| cap
->implemented
,
2031 ci
->i_flushing_caps
, NULL
);
2033 spin_lock(&ci
->i_ceph_lock
);
2034 __cap_delay_requeue(mdsc
, ci
);
2035 spin_unlock(&ci
->i_ceph_lock
);
2038 spin_unlock(&ci
->i_ceph_lock
);
2044 * Take references to capabilities we hold, so that we don't release
2045 * them to the MDS prematurely.
2047 * Protected by i_ceph_lock.
2049 static void __take_cap_refs(struct ceph_inode_info
*ci
, int got
)
2051 if (got
& CEPH_CAP_PIN
)
2053 if (got
& CEPH_CAP_FILE_RD
)
2055 if (got
& CEPH_CAP_FILE_CACHE
)
2056 ci
->i_rdcache_ref
++;
2057 if (got
& CEPH_CAP_FILE_WR
)
2059 if (got
& CEPH_CAP_FILE_BUFFER
) {
2060 if (ci
->i_wb_ref
== 0)
2061 ihold(&ci
->vfs_inode
);
2063 dout("__take_cap_refs %p wb %d -> %d (?)\n",
2064 &ci
->vfs_inode
, ci
->i_wb_ref
-1, ci
->i_wb_ref
);
2069 * Try to grab cap references. Specify those refs we @want, and the
2070 * minimal set we @need. Also include the larger offset we are writing
2071 * to (when applicable), and check against max_size here as well.
2072 * Note that caller is responsible for ensuring max_size increases are
2073 * requested from the MDS.
2075 static int try_get_cap_refs(struct ceph_inode_info
*ci
, int need
, int want
,
2076 loff_t endoff
, int *got
, struct page
**pinned_page
,
2077 int *check_max
, int *err
)
2079 struct inode
*inode
= &ci
->vfs_inode
;
2081 int have
, implemented
, _got
= 0;
2084 dout("get_cap_refs %p need %s want %s\n", inode
,
2085 ceph_cap_string(need
), ceph_cap_string(want
));
2087 spin_lock(&ci
->i_ceph_lock
);
2089 /* make sure file is actually open */
2090 file_wanted
= __ceph_caps_file_wanted(ci
);
2091 if ((file_wanted
& need
) == 0) {
2092 dout("try_get_cap_refs need %s file_wanted %s, EBADF\n",
2093 ceph_cap_string(need
), ceph_cap_string(file_wanted
));
2099 /* finish pending truncate */
2100 while (ci
->i_truncate_pending
) {
2101 spin_unlock(&ci
->i_ceph_lock
);
2102 __ceph_do_pending_vmtruncate(inode
);
2103 spin_lock(&ci
->i_ceph_lock
);
2106 have
= __ceph_caps_issued(ci
, &implemented
);
2108 if (have
& need
& CEPH_CAP_FILE_WR
) {
2109 if (endoff
>= 0 && endoff
> (loff_t
)ci
->i_max_size
) {
2110 dout("get_cap_refs %p endoff %llu > maxsize %llu\n",
2111 inode
, endoff
, ci
->i_max_size
);
2112 if (endoff
> ci
->i_requested_max_size
) {
2119 * If a sync write is in progress, we must wait, so that we
2120 * can get a final snapshot value for size+mtime.
2122 if (__ceph_have_pending_cap_snap(ci
)) {
2123 dout("get_cap_refs %p cap_snap_pending\n", inode
);
2128 if ((have
& need
) == need
) {
2130 * Look at (implemented & ~have & not) so that we keep waiting
2131 * on transition from wanted -> needed caps. This is needed
2132 * for WRBUFFER|WR -> WR to avoid a new WR sync write from
2133 * going before a prior buffered writeback happens.
2135 int not = want
& ~(have
& need
);
2136 int revoking
= implemented
& ~have
;
2137 dout("get_cap_refs %p have %s but not %s (revoking %s)\n",
2138 inode
, ceph_cap_string(have
), ceph_cap_string(not),
2139 ceph_cap_string(revoking
));
2140 if ((revoking
& not) == 0) {
2141 _got
= need
| (have
& want
);
2142 __take_cap_refs(ci
, _got
);
2146 int session_readonly
= false;
2147 if ((need
& CEPH_CAP_FILE_WR
) && ci
->i_auth_cap
) {
2148 struct ceph_mds_session
*s
= ci
->i_auth_cap
->session
;
2149 spin_lock(&s
->s_cap_lock
);
2150 session_readonly
= s
->s_readonly
;
2151 spin_unlock(&s
->s_cap_lock
);
2153 if (session_readonly
) {
2154 dout("get_cap_refs %p needed %s but mds%d readonly\n",
2155 inode
, ceph_cap_string(need
), ci
->i_auth_cap
->mds
);
2161 dout("get_cap_refs %p have %s needed %s\n", inode
,
2162 ceph_cap_string(have
), ceph_cap_string(need
));
2165 spin_unlock(&ci
->i_ceph_lock
);
2167 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
2168 (_got
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) &&
2169 i_size_read(inode
) > 0) {
2171 struct page
*page
= find_get_page(inode
->i_mapping
, 0);
2173 if (PageUptodate(page
)) {
2174 *pinned_page
= page
;
2177 page_cache_release(page
);
2180 * drop cap refs first because getattr while holding
2181 * caps refs can cause deadlock.
2183 ceph_put_cap_refs(ci
, _got
);
2186 /* getattr request will bring inline data into page cache */
2187 ret1
= __ceph_do_getattr(inode
, NULL
,
2188 CEPH_STAT_CAP_INLINE_DATA
, true);
2197 dout("get_cap_refs %p ret %d got %s\n", inode
,
2198 ret
, ceph_cap_string(_got
));
2204 * Check the offset we are writing up to against our current
2205 * max_size. If necessary, tell the MDS we want to write to
2208 static void check_max_size(struct inode
*inode
, loff_t endoff
)
2210 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2213 /* do we need to explicitly request a larger max_size? */
2214 spin_lock(&ci
->i_ceph_lock
);
2215 if (endoff
>= ci
->i_max_size
&& endoff
> ci
->i_wanted_max_size
) {
2216 dout("write %p at large endoff %llu, req max_size\n",
2218 ci
->i_wanted_max_size
= endoff
;
2220 /* duplicate ceph_check_caps()'s logic */
2221 if (ci
->i_auth_cap
&&
2222 (ci
->i_auth_cap
->issued
& CEPH_CAP_FILE_WR
) &&
2223 ci
->i_wanted_max_size
> ci
->i_max_size
&&
2224 ci
->i_wanted_max_size
> ci
->i_requested_max_size
)
2226 spin_unlock(&ci
->i_ceph_lock
);
2228 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
2232 * Wait for caps, and take cap references. If we can't get a WR cap
2233 * due to a small max_size, make sure we check_max_size (and possibly
2234 * ask the mds) so we don't get hung up indefinitely.
2236 int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
2237 loff_t endoff
, int *got
, struct page
**pinned_page
)
2239 int check_max
, ret
, err
;
2243 check_max_size(&ci
->vfs_inode
, endoff
);
2246 ret
= wait_event_interruptible(ci
->i_cap_wq
,
2247 try_get_cap_refs(ci
, need
, want
, endoff
,
2258 * Take cap refs. Caller must already know we hold at least one ref
2259 * on the caps in question or we don't know this is safe.
2261 void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
)
2263 spin_lock(&ci
->i_ceph_lock
);
2264 __take_cap_refs(ci
, caps
);
2265 spin_unlock(&ci
->i_ceph_lock
);
2271 * If we released the last ref on any given cap, call ceph_check_caps
2272 * to release (or schedule a release).
2274 * If we are releasing a WR cap (from a sync write), finalize any affected
2275 * cap_snap, and wake up any waiters.
2277 void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
)
2279 struct inode
*inode
= &ci
->vfs_inode
;
2280 int last
= 0, put
= 0, flushsnaps
= 0, wake
= 0;
2281 struct ceph_cap_snap
*capsnap
;
2283 spin_lock(&ci
->i_ceph_lock
);
2284 if (had
& CEPH_CAP_PIN
)
2286 if (had
& CEPH_CAP_FILE_RD
)
2287 if (--ci
->i_rd_ref
== 0)
2289 if (had
& CEPH_CAP_FILE_CACHE
)
2290 if (--ci
->i_rdcache_ref
== 0)
2292 if (had
& CEPH_CAP_FILE_BUFFER
) {
2293 if (--ci
->i_wb_ref
== 0) {
2297 dout("put_cap_refs %p wb %d -> %d (?)\n",
2298 inode
, ci
->i_wb_ref
+1, ci
->i_wb_ref
);
2300 if (had
& CEPH_CAP_FILE_WR
)
2301 if (--ci
->i_wr_ref
== 0) {
2303 if (!list_empty(&ci
->i_cap_snaps
)) {
2304 capsnap
= list_first_entry(&ci
->i_cap_snaps
,
2305 struct ceph_cap_snap
,
2307 if (capsnap
->writing
) {
2308 capsnap
->writing
= 0;
2310 __ceph_finish_cap_snap(ci
,
2316 spin_unlock(&ci
->i_ceph_lock
);
2318 dout("put_cap_refs %p had %s%s%s\n", inode
, ceph_cap_string(had
),
2319 last
? " last" : "", put
? " put" : "");
2321 if (last
&& !flushsnaps
)
2322 ceph_check_caps(ci
, 0, NULL
);
2323 else if (flushsnaps
)
2324 ceph_flush_snaps(ci
);
2326 wake_up_all(&ci
->i_cap_wq
);
2332 * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap
2333 * context. Adjust per-snap dirty page accounting as appropriate.
2334 * Once all dirty data for a cap_snap is flushed, flush snapped file
2335 * metadata back to the MDS. If we dropped the last ref, call
2338 void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
2339 struct ceph_snap_context
*snapc
)
2341 struct inode
*inode
= &ci
->vfs_inode
;
2343 int complete_capsnap
= 0;
2344 int drop_capsnap
= 0;
2346 struct ceph_cap_snap
*capsnap
= NULL
;
2348 spin_lock(&ci
->i_ceph_lock
);
2349 ci
->i_wrbuffer_ref
-= nr
;
2350 last
= !ci
->i_wrbuffer_ref
;
2352 if (ci
->i_head_snapc
== snapc
) {
2353 ci
->i_wrbuffer_ref_head
-= nr
;
2354 if (ci
->i_wrbuffer_ref_head
== 0 &&
2355 ci
->i_dirty_caps
== 0 && ci
->i_flushing_caps
== 0) {
2356 BUG_ON(!ci
->i_head_snapc
);
2357 ceph_put_snap_context(ci
->i_head_snapc
);
2358 ci
->i_head_snapc
= NULL
;
2360 dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n",
2362 ci
->i_wrbuffer_ref
+nr
, ci
->i_wrbuffer_ref_head
+nr
,
2363 ci
->i_wrbuffer_ref
, ci
->i_wrbuffer_ref_head
,
2364 last
? " LAST" : "");
2366 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
2367 if (capsnap
->context
== snapc
) {
2373 capsnap
->dirty_pages
-= nr
;
2374 if (capsnap
->dirty_pages
== 0) {
2375 complete_capsnap
= 1;
2376 if (capsnap
->dirty
== 0)
2377 /* cap writeback completed before we created
2378 * the cap_snap; no FLUSHSNAP is needed */
2381 dout("put_wrbuffer_cap_refs on %p cap_snap %p "
2382 " snap %lld %d/%d -> %d/%d %s%s%s\n",
2383 inode
, capsnap
, capsnap
->context
->seq
,
2384 ci
->i_wrbuffer_ref
+nr
, capsnap
->dirty_pages
+ nr
,
2385 ci
->i_wrbuffer_ref
, capsnap
->dirty_pages
,
2386 last
? " (wrbuffer last)" : "",
2387 complete_capsnap
? " (complete capsnap)" : "",
2388 drop_capsnap
? " (drop capsnap)" : "");
2390 ceph_put_snap_context(capsnap
->context
);
2391 list_del(&capsnap
->ci_item
);
2392 list_del(&capsnap
->flushing_item
);
2393 ceph_put_cap_snap(capsnap
);
2397 spin_unlock(&ci
->i_ceph_lock
);
2400 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
2402 } else if (complete_capsnap
) {
2403 ceph_flush_snaps(ci
);
2404 wake_up_all(&ci
->i_cap_wq
);
2411 * Invalidate unlinked inode's aliases, so we can drop the inode ASAP.
2413 static void invalidate_aliases(struct inode
*inode
)
2415 struct dentry
*dn
, *prev
= NULL
;
2417 dout("invalidate_aliases inode %p\n", inode
);
2418 d_prune_aliases(inode
);
2420 * For non-directory inode, d_find_alias() only returns
2421 * hashed dentry. After calling d_invalidate(), the
2422 * dentry becomes unhashed.
2424 * For directory inode, d_find_alias() can return
2425 * unhashed dentry. But directory inode should have
2426 * one alias at most.
2428 while ((dn
= d_find_alias(inode
))) {
2443 * Handle a cap GRANT message from the MDS. (Note that a GRANT may
2444 * actually be a revocation if it specifies a smaller cap set.)
2446 * caller holds s_mutex and i_ceph_lock, we drop both.
2448 static void handle_cap_grant(struct ceph_mds_client
*mdsc
,
2449 struct inode
*inode
, struct ceph_mds_caps
*grant
,
2450 void *snaptrace
, int snaptrace_len
,
2452 void *inline_data
, int inline_len
,
2453 struct ceph_buffer
*xattr_buf
,
2454 struct ceph_mds_session
*session
,
2455 struct ceph_cap
*cap
, int issued
)
2456 __releases(ci
->i_ceph_lock
)
2458 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2459 int mds
= session
->s_mds
;
2460 int seq
= le32_to_cpu(grant
->seq
);
2461 int newcaps
= le32_to_cpu(grant
->caps
);
2462 int used
, wanted
, dirty
;
2463 u64 size
= le64_to_cpu(grant
->size
);
2464 u64 max_size
= le64_to_cpu(grant
->max_size
);
2465 struct timespec mtime
, atime
, ctime
;
2468 bool writeback
= false;
2469 bool queue_trunc
= false;
2470 bool queue_invalidate
= false;
2471 bool queue_revalidate
= false;
2472 bool deleted_inode
= false;
2473 bool fill_inline
= false;
2475 dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n",
2476 inode
, cap
, mds
, seq
, ceph_cap_string(newcaps
));
2477 dout(" size %llu max_size %llu, i_size %llu\n", size
, max_size
,
2482 * auth mds of the inode changed. we received the cap export message,
2483 * but still haven't received the cap import message. handle_cap_export
2484 * updated the new auth MDS' cap.
2486 * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message
2487 * that was sent before the cap import message. So don't remove caps.
2489 if (ceph_seq_cmp(seq
, cap
->seq
) <= 0) {
2490 WARN_ON(cap
!= ci
->i_auth_cap
);
2491 WARN_ON(cap
->cap_id
!= le64_to_cpu(grant
->cap_id
));
2493 newcaps
|= cap
->issued
;
2497 * If CACHE is being revoked, and we have no dirty buffers,
2498 * try to invalidate (once). (If there are dirty buffers, we
2499 * will invalidate _after_ writeback.)
2501 if (((cap
->issued
& ~newcaps
) & CEPH_CAP_FILE_CACHE
) &&
2502 (newcaps
& CEPH_CAP_FILE_LAZYIO
) == 0 &&
2503 !ci
->i_wrbuffer_ref
) {
2504 if (try_nonblocking_invalidate(inode
)) {
2505 /* there were locked pages.. invalidate later
2506 in a separate thread. */
2507 if (ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
2508 queue_invalidate
= true;
2509 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
2513 ceph_fscache_invalidate(inode
);
2516 /* side effects now are allowed */
2517 cap
->cap_gen
= session
->s_cap_gen
;
2520 __check_cap_issue(ci
, cap
, newcaps
);
2522 if ((newcaps
& CEPH_CAP_AUTH_SHARED
) &&
2523 (issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
2524 inode
->i_mode
= le32_to_cpu(grant
->mode
);
2525 inode
->i_uid
= make_kuid(&init_user_ns
, le32_to_cpu(grant
->uid
));
2526 inode
->i_gid
= make_kgid(&init_user_ns
, le32_to_cpu(grant
->gid
));
2527 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
2528 from_kuid(&init_user_ns
, inode
->i_uid
),
2529 from_kgid(&init_user_ns
, inode
->i_gid
));
2532 if ((newcaps
& CEPH_CAP_AUTH_SHARED
) &&
2533 (issued
& CEPH_CAP_LINK_EXCL
) == 0) {
2534 set_nlink(inode
, le32_to_cpu(grant
->nlink
));
2535 if (inode
->i_nlink
== 0 &&
2536 (newcaps
& (CEPH_CAP_LINK_SHARED
| CEPH_CAP_LINK_EXCL
)))
2537 deleted_inode
= true;
2540 if ((issued
& CEPH_CAP_XATTR_EXCL
) == 0 && grant
->xattr_len
) {
2541 int len
= le32_to_cpu(grant
->xattr_len
);
2542 u64 version
= le64_to_cpu(grant
->xattr_version
);
2544 if (version
> ci
->i_xattrs
.version
) {
2545 dout(" got new xattrs v%llu on %p len %d\n",
2546 version
, inode
, len
);
2547 if (ci
->i_xattrs
.blob
)
2548 ceph_buffer_put(ci
->i_xattrs
.blob
);
2549 ci
->i_xattrs
.blob
= ceph_buffer_get(xattr_buf
);
2550 ci
->i_xattrs
.version
= version
;
2551 ceph_forget_all_cached_acls(inode
);
2555 /* Do we need to revalidate our fscache cookie. Don't bother on the
2556 * first cache cap as we already validate at cookie creation time. */
2557 if ((issued
& CEPH_CAP_FILE_CACHE
) && ci
->i_rdcache_gen
> 1)
2558 queue_revalidate
= true;
2560 if (newcaps
& CEPH_CAP_ANY_RD
) {
2561 /* ctime/mtime/atime? */
2562 ceph_decode_timespec(&mtime
, &grant
->mtime
);
2563 ceph_decode_timespec(&atime
, &grant
->atime
);
2564 ceph_decode_timespec(&ctime
, &grant
->ctime
);
2565 ceph_fill_file_time(inode
, issued
,
2566 le32_to_cpu(grant
->time_warp_seq
),
2567 &ctime
, &mtime
, &atime
);
2570 if (newcaps
& (CEPH_CAP_ANY_FILE_RD
| CEPH_CAP_ANY_FILE_WR
)) {
2571 /* file layout may have changed */
2572 ci
->i_layout
= grant
->layout
;
2573 /* size/truncate_seq? */
2574 queue_trunc
= ceph_fill_file_size(inode
, issued
,
2575 le32_to_cpu(grant
->truncate_seq
),
2576 le64_to_cpu(grant
->truncate_size
),
2578 /* max size increase? */
2579 if (ci
->i_auth_cap
== cap
&& max_size
!= ci
->i_max_size
) {
2580 dout("max_size %lld -> %llu\n",
2581 ci
->i_max_size
, max_size
);
2582 ci
->i_max_size
= max_size
;
2583 if (max_size
>= ci
->i_wanted_max_size
) {
2584 ci
->i_wanted_max_size
= 0; /* reset */
2585 ci
->i_requested_max_size
= 0;
2591 /* check cap bits */
2592 wanted
= __ceph_caps_wanted(ci
);
2593 used
= __ceph_caps_used(ci
);
2594 dirty
= __ceph_caps_dirty(ci
);
2595 dout(" my wanted = %s, used = %s, dirty %s\n",
2596 ceph_cap_string(wanted
),
2597 ceph_cap_string(used
),
2598 ceph_cap_string(dirty
));
2599 if (wanted
!= le32_to_cpu(grant
->wanted
)) {
2600 dout("mds wanted %s -> %s\n",
2601 ceph_cap_string(le32_to_cpu(grant
->wanted
)),
2602 ceph_cap_string(wanted
));
2603 /* imported cap may not have correct mds_wanted */
2604 if (le32_to_cpu(grant
->op
) == CEPH_CAP_OP_IMPORT
)
2608 /* revocation, grant, or no-op? */
2609 if (cap
->issued
& ~newcaps
) {
2610 int revoking
= cap
->issued
& ~newcaps
;
2612 dout("revocation: %s -> %s (revoking %s)\n",
2613 ceph_cap_string(cap
->issued
),
2614 ceph_cap_string(newcaps
),
2615 ceph_cap_string(revoking
));
2616 if (revoking
& used
& CEPH_CAP_FILE_BUFFER
)
2617 writeback
= true; /* initiate writeback; will delay ack */
2618 else if (revoking
== CEPH_CAP_FILE_CACHE
&&
2619 (newcaps
& CEPH_CAP_FILE_LAZYIO
) == 0 &&
2621 ; /* do nothing yet, invalidation will be queued */
2622 else if (cap
== ci
->i_auth_cap
)
2623 check_caps
= 1; /* check auth cap only */
2625 check_caps
= 2; /* check all caps */
2626 cap
->issued
= newcaps
;
2627 cap
->implemented
|= newcaps
;
2628 } else if (cap
->issued
== newcaps
) {
2629 dout("caps unchanged: %s -> %s\n",
2630 ceph_cap_string(cap
->issued
), ceph_cap_string(newcaps
));
2632 dout("grant: %s -> %s\n", ceph_cap_string(cap
->issued
),
2633 ceph_cap_string(newcaps
));
2634 /* non-auth MDS is revoking the newly grant caps ? */
2635 if (cap
== ci
->i_auth_cap
&&
2636 __ceph_caps_revoking_other(ci
, cap
, newcaps
))
2639 cap
->issued
= newcaps
;
2640 cap
->implemented
|= newcaps
; /* add bits only, to
2641 * avoid stepping on a
2642 * pending revocation */
2645 BUG_ON(cap
->issued
& ~cap
->implemented
);
2647 if (inline_version
> 0 && inline_version
>= ci
->i_inline_version
) {
2648 ci
->i_inline_version
= inline_version
;
2649 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
2650 (newcaps
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)))
2654 spin_unlock(&ci
->i_ceph_lock
);
2656 if (le32_to_cpu(grant
->op
) == CEPH_CAP_OP_IMPORT
) {
2657 down_write(&mdsc
->snap_rwsem
);
2658 ceph_update_snap_trace(mdsc
, snaptrace
,
2659 snaptrace
+ snaptrace_len
, false);
2660 downgrade_write(&mdsc
->snap_rwsem
);
2661 kick_flushing_inode_caps(mdsc
, session
, inode
);
2662 up_read(&mdsc
->snap_rwsem
);
2663 if (newcaps
& ~issued
)
2668 ceph_fill_inline_data(inode
, NULL
, inline_data
, inline_len
);
2671 ceph_queue_vmtruncate(inode
);
2672 ceph_queue_revalidate(inode
);
2673 } else if (queue_revalidate
)
2674 ceph_queue_revalidate(inode
);
2678 * queue inode for writeback: we can't actually call
2679 * filemap_write_and_wait, etc. from message handler
2682 ceph_queue_writeback(inode
);
2683 if (queue_invalidate
)
2684 ceph_queue_invalidate(inode
);
2686 invalidate_aliases(inode
);
2688 wake_up_all(&ci
->i_cap_wq
);
2690 if (check_caps
== 1)
2691 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
|CHECK_CAPS_AUTHONLY
,
2693 else if (check_caps
== 2)
2694 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
, session
);
2696 mutex_unlock(&session
->s_mutex
);
2700 * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the
2701 * MDS has been safely committed.
2703 static void handle_cap_flush_ack(struct inode
*inode
, u64 flush_tid
,
2704 struct ceph_mds_caps
*m
,
2705 struct ceph_mds_session
*session
,
2706 struct ceph_cap
*cap
)
2707 __releases(ci
->i_ceph_lock
)
2709 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2710 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2711 unsigned seq
= le32_to_cpu(m
->seq
);
2712 int dirty
= le32_to_cpu(m
->dirty
);
2717 for (i
= 0; i
< CEPH_CAP_BITS
; i
++)
2718 if ((dirty
& (1 << i
)) &&
2719 (u16
)flush_tid
== ci
->i_cap_flush_tid
[i
])
2722 dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s,"
2723 " flushing %s -> %s\n",
2724 inode
, session
->s_mds
, seq
, ceph_cap_string(dirty
),
2725 ceph_cap_string(cleaned
), ceph_cap_string(ci
->i_flushing_caps
),
2726 ceph_cap_string(ci
->i_flushing_caps
& ~cleaned
));
2728 if (ci
->i_flushing_caps
== (ci
->i_flushing_caps
& ~cleaned
))
2731 ci
->i_flushing_caps
&= ~cleaned
;
2733 spin_lock(&mdsc
->cap_dirty_lock
);
2734 if (ci
->i_flushing_caps
== 0) {
2735 list_del_init(&ci
->i_flushing_item
);
2736 if (!list_empty(&session
->s_cap_flushing
))
2737 dout(" mds%d still flushing cap on %p\n",
2739 &list_entry(session
->s_cap_flushing
.next
,
2740 struct ceph_inode_info
,
2741 i_flushing_item
)->vfs_inode
);
2742 mdsc
->num_cap_flushing
--;
2743 wake_up_all(&mdsc
->cap_flushing_wq
);
2744 dout(" inode %p now !flushing\n", inode
);
2746 if (ci
->i_dirty_caps
== 0) {
2747 dout(" inode %p now clean\n", inode
);
2748 BUG_ON(!list_empty(&ci
->i_dirty_item
));
2750 if (ci
->i_wrbuffer_ref_head
== 0) {
2751 BUG_ON(!ci
->i_head_snapc
);
2752 ceph_put_snap_context(ci
->i_head_snapc
);
2753 ci
->i_head_snapc
= NULL
;
2756 BUG_ON(list_empty(&ci
->i_dirty_item
));
2759 spin_unlock(&mdsc
->cap_dirty_lock
);
2760 wake_up_all(&ci
->i_cap_wq
);
2763 spin_unlock(&ci
->i_ceph_lock
);
2769 * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can
2770 * throw away our cap_snap.
2772 * Caller hold s_mutex.
2774 static void handle_cap_flushsnap_ack(struct inode
*inode
, u64 flush_tid
,
2775 struct ceph_mds_caps
*m
,
2776 struct ceph_mds_session
*session
)
2778 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2779 u64 follows
= le64_to_cpu(m
->snap_follows
);
2780 struct ceph_cap_snap
*capsnap
;
2783 dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n",
2784 inode
, ci
, session
->s_mds
, follows
);
2786 spin_lock(&ci
->i_ceph_lock
);
2787 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
2788 if (capsnap
->follows
== follows
) {
2789 if (capsnap
->flush_tid
!= flush_tid
) {
2790 dout(" cap_snap %p follows %lld tid %lld !="
2791 " %lld\n", capsnap
, follows
,
2792 flush_tid
, capsnap
->flush_tid
);
2795 WARN_ON(capsnap
->dirty_pages
|| capsnap
->writing
);
2796 dout(" removing %p cap_snap %p follows %lld\n",
2797 inode
, capsnap
, follows
);
2798 ceph_put_snap_context(capsnap
->context
);
2799 list_del(&capsnap
->ci_item
);
2800 list_del(&capsnap
->flushing_item
);
2801 ceph_put_cap_snap(capsnap
);
2805 dout(" skipping cap_snap %p follows %lld\n",
2806 capsnap
, capsnap
->follows
);
2809 spin_unlock(&ci
->i_ceph_lock
);
2815 * Handle TRUNC from MDS, indicating file truncation.
2817 * caller hold s_mutex.
2819 static void handle_cap_trunc(struct inode
*inode
,
2820 struct ceph_mds_caps
*trunc
,
2821 struct ceph_mds_session
*session
)
2822 __releases(ci
->i_ceph_lock
)
2824 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2825 int mds
= session
->s_mds
;
2826 int seq
= le32_to_cpu(trunc
->seq
);
2827 u32 truncate_seq
= le32_to_cpu(trunc
->truncate_seq
);
2828 u64 truncate_size
= le64_to_cpu(trunc
->truncate_size
);
2829 u64 size
= le64_to_cpu(trunc
->size
);
2830 int implemented
= 0;
2831 int dirty
= __ceph_caps_dirty(ci
);
2832 int issued
= __ceph_caps_issued(ceph_inode(inode
), &implemented
);
2833 int queue_trunc
= 0;
2835 issued
|= implemented
| dirty
;
2837 dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n",
2838 inode
, mds
, seq
, truncate_size
, truncate_seq
);
2839 queue_trunc
= ceph_fill_file_size(inode
, issued
,
2840 truncate_seq
, truncate_size
, size
);
2841 spin_unlock(&ci
->i_ceph_lock
);
2844 ceph_queue_vmtruncate(inode
);
2845 ceph_fscache_invalidate(inode
);
2850 * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a
2851 * different one. If we are the most recent migration we've seen (as
2852 * indicated by mseq), make note of the migrating cap bits for the
2853 * duration (until we see the corresponding IMPORT).
2855 * caller holds s_mutex
2857 static void handle_cap_export(struct inode
*inode
, struct ceph_mds_caps
*ex
,
2858 struct ceph_mds_cap_peer
*ph
,
2859 struct ceph_mds_session
*session
)
2861 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
2862 struct ceph_mds_session
*tsession
= NULL
;
2863 struct ceph_cap
*cap
, *tcap
, *new_cap
= NULL
;
2864 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2866 unsigned mseq
= le32_to_cpu(ex
->migrate_seq
);
2867 unsigned t_seq
, t_mseq
;
2869 int mds
= session
->s_mds
;
2872 t_cap_id
= le64_to_cpu(ph
->cap_id
);
2873 t_seq
= le32_to_cpu(ph
->seq
);
2874 t_mseq
= le32_to_cpu(ph
->mseq
);
2875 target
= le32_to_cpu(ph
->mds
);
2877 t_cap_id
= t_seq
= t_mseq
= 0;
2881 dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n",
2882 inode
, ci
, mds
, mseq
, target
);
2884 spin_lock(&ci
->i_ceph_lock
);
2885 cap
= __get_cap_for_mds(ci
, mds
);
2886 if (!cap
|| cap
->cap_id
!= le64_to_cpu(ex
->cap_id
))
2890 __ceph_remove_cap(cap
, false);
2895 * now we know we haven't received the cap import message yet
2896 * because the exported cap still exist.
2899 issued
= cap
->issued
;
2900 WARN_ON(issued
!= cap
->implemented
);
2902 tcap
= __get_cap_for_mds(ci
, target
);
2904 /* already have caps from the target */
2905 if (tcap
->cap_id
!= t_cap_id
||
2906 ceph_seq_cmp(tcap
->seq
, t_seq
) < 0) {
2907 dout(" updating import cap %p mds%d\n", tcap
, target
);
2908 tcap
->cap_id
= t_cap_id
;
2909 tcap
->seq
= t_seq
- 1;
2910 tcap
->issue_seq
= t_seq
- 1;
2911 tcap
->mseq
= t_mseq
;
2912 tcap
->issued
|= issued
;
2913 tcap
->implemented
|= issued
;
2914 if (cap
== ci
->i_auth_cap
)
2915 ci
->i_auth_cap
= tcap
;
2916 if (ci
->i_flushing_caps
&& ci
->i_auth_cap
== tcap
) {
2917 spin_lock(&mdsc
->cap_dirty_lock
);
2918 list_move_tail(&ci
->i_flushing_item
,
2919 &tcap
->session
->s_cap_flushing
);
2920 spin_unlock(&mdsc
->cap_dirty_lock
);
2923 __ceph_remove_cap(cap
, false);
2925 } else if (tsession
) {
2926 /* add placeholder for the export tagert */
2927 int flag
= (cap
== ci
->i_auth_cap
) ? CEPH_CAP_FLAG_AUTH
: 0;
2928 ceph_add_cap(inode
, tsession
, t_cap_id
, -1, issued
, 0,
2929 t_seq
- 1, t_mseq
, (u64
)-1, flag
, &new_cap
);
2931 __ceph_remove_cap(cap
, false);
2935 spin_unlock(&ci
->i_ceph_lock
);
2936 mutex_unlock(&session
->s_mutex
);
2938 /* open target session */
2939 tsession
= ceph_mdsc_open_export_target_session(mdsc
, target
);
2940 if (!IS_ERR(tsession
)) {
2942 mutex_lock(&session
->s_mutex
);
2943 mutex_lock_nested(&tsession
->s_mutex
,
2944 SINGLE_DEPTH_NESTING
);
2946 mutex_lock(&tsession
->s_mutex
);
2947 mutex_lock_nested(&session
->s_mutex
,
2948 SINGLE_DEPTH_NESTING
);
2950 ceph_add_cap_releases(mdsc
, tsession
);
2951 new_cap
= ceph_get_cap(mdsc
, NULL
);
2960 spin_unlock(&ci
->i_ceph_lock
);
2961 mutex_unlock(&session
->s_mutex
);
2963 mutex_unlock(&tsession
->s_mutex
);
2964 ceph_put_mds_session(tsession
);
2967 ceph_put_cap(mdsc
, new_cap
);
2971 * Handle cap IMPORT.
2973 * caller holds s_mutex. acquires i_ceph_lock
2975 static void handle_cap_import(struct ceph_mds_client
*mdsc
,
2976 struct inode
*inode
, struct ceph_mds_caps
*im
,
2977 struct ceph_mds_cap_peer
*ph
,
2978 struct ceph_mds_session
*session
,
2979 struct ceph_cap
**target_cap
, int *old_issued
)
2980 __acquires(ci
->i_ceph_lock
)
2982 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2983 struct ceph_cap
*cap
, *ocap
, *new_cap
= NULL
;
2984 int mds
= session
->s_mds
;
2986 unsigned caps
= le32_to_cpu(im
->caps
);
2987 unsigned wanted
= le32_to_cpu(im
->wanted
);
2988 unsigned seq
= le32_to_cpu(im
->seq
);
2989 unsigned mseq
= le32_to_cpu(im
->migrate_seq
);
2990 u64 realmino
= le64_to_cpu(im
->realm
);
2991 u64 cap_id
= le64_to_cpu(im
->cap_id
);
2996 p_cap_id
= le64_to_cpu(ph
->cap_id
);
2997 peer
= le32_to_cpu(ph
->mds
);
3003 dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n",
3004 inode
, ci
, mds
, mseq
, peer
);
3007 spin_lock(&ci
->i_ceph_lock
);
3008 cap
= __get_cap_for_mds(ci
, mds
);
3011 spin_unlock(&ci
->i_ceph_lock
);
3012 new_cap
= ceph_get_cap(mdsc
, NULL
);
3018 ceph_put_cap(mdsc
, new_cap
);
3023 __ceph_caps_issued(ci
, &issued
);
3024 issued
|= __ceph_caps_dirty(ci
);
3026 ceph_add_cap(inode
, session
, cap_id
, -1, caps
, wanted
, seq
, mseq
,
3027 realmino
, CEPH_CAP_FLAG_AUTH
, &new_cap
);
3029 ocap
= peer
>= 0 ? __get_cap_for_mds(ci
, peer
) : NULL
;
3030 if (ocap
&& ocap
->cap_id
== p_cap_id
) {
3031 dout(" remove export cap %p mds%d flags %d\n",
3032 ocap
, peer
, ph
->flags
);
3033 if ((ph
->flags
& CEPH_CAP_FLAG_AUTH
) &&
3034 (ocap
->seq
!= le32_to_cpu(ph
->seq
) ||
3035 ocap
->mseq
!= le32_to_cpu(ph
->mseq
))) {
3036 pr_err("handle_cap_import: mismatched seq/mseq: "
3037 "ino (%llx.%llx) mds%d seq %d mseq %d "
3038 "importer mds%d has peer seq %d mseq %d\n",
3039 ceph_vinop(inode
), peer
, ocap
->seq
,
3040 ocap
->mseq
, mds
, le32_to_cpu(ph
->seq
),
3041 le32_to_cpu(ph
->mseq
));
3043 __ceph_remove_cap(ocap
, (ph
->flags
& CEPH_CAP_FLAG_RELEASE
));
3046 /* make sure we re-request max_size, if necessary */
3047 ci
->i_wanted_max_size
= 0;
3048 ci
->i_requested_max_size
= 0;
3050 *old_issued
= issued
;
3055 * Handle a caps message from the MDS.
3057 * Identify the appropriate session, inode, and call the right handler
3058 * based on the cap op.
3060 void ceph_handle_caps(struct ceph_mds_session
*session
,
3061 struct ceph_msg
*msg
)
3063 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
3064 struct super_block
*sb
= mdsc
->fsc
->sb
;
3065 struct inode
*inode
;
3066 struct ceph_inode_info
*ci
;
3067 struct ceph_cap
*cap
;
3068 struct ceph_mds_caps
*h
;
3069 struct ceph_mds_cap_peer
*peer
= NULL
;
3070 int mds
= session
->s_mds
;
3073 struct ceph_vino vino
;
3077 u64 inline_version
= 0;
3078 void *inline_data
= NULL
;
3081 size_t snaptrace_len
;
3084 dout("handle_caps from mds%d\n", mds
);
3087 end
= msg
->front
.iov_base
+ msg
->front
.iov_len
;
3088 tid
= le64_to_cpu(msg
->hdr
.tid
);
3089 if (msg
->front
.iov_len
< sizeof(*h
))
3091 h
= msg
->front
.iov_base
;
3092 op
= le32_to_cpu(h
->op
);
3093 vino
.ino
= le64_to_cpu(h
->ino
);
3094 vino
.snap
= CEPH_NOSNAP
;
3095 cap_id
= le64_to_cpu(h
->cap_id
);
3096 seq
= le32_to_cpu(h
->seq
);
3097 mseq
= le32_to_cpu(h
->migrate_seq
);
3098 size
= le64_to_cpu(h
->size
);
3099 max_size
= le64_to_cpu(h
->max_size
);
3102 snaptrace_len
= le32_to_cpu(h
->snap_trace_len
);
3103 p
= snaptrace
+ snaptrace_len
;
3105 if (le16_to_cpu(msg
->hdr
.version
) >= 2) {
3107 ceph_decode_32_safe(&p
, end
, flock_len
, bad
);
3108 if (p
+ flock_len
> end
)
3113 if (le16_to_cpu(msg
->hdr
.version
) >= 3) {
3114 if (op
== CEPH_CAP_OP_IMPORT
) {
3115 if (p
+ sizeof(*peer
) > end
)
3119 } else if (op
== CEPH_CAP_OP_EXPORT
) {
3120 /* recorded in unused fields */
3121 peer
= (void *)&h
->size
;
3125 if (le16_to_cpu(msg
->hdr
.version
) >= 4) {
3126 ceph_decode_64_safe(&p
, end
, inline_version
, bad
);
3127 ceph_decode_32_safe(&p
, end
, inline_len
, bad
);
3128 if (p
+ inline_len
> end
)
3135 inode
= ceph_find_inode(sb
, vino
);
3136 ci
= ceph_inode(inode
);
3137 dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op
), vino
.ino
,
3140 mutex_lock(&session
->s_mutex
);
3142 dout(" mds%d seq %lld cap seq %u\n", session
->s_mds
, session
->s_seq
,
3145 if (op
== CEPH_CAP_OP_IMPORT
)
3146 ceph_add_cap_releases(mdsc
, session
);
3149 dout(" i don't have ino %llx\n", vino
.ino
);
3151 if (op
== CEPH_CAP_OP_IMPORT
) {
3152 spin_lock(&session
->s_cap_lock
);
3153 __queue_cap_release(session
, vino
.ino
, cap_id
,
3155 spin_unlock(&session
->s_cap_lock
);
3157 goto flush_cap_releases
;
3160 /* these will work even if we don't have a cap yet */
3162 case CEPH_CAP_OP_FLUSHSNAP_ACK
:
3163 handle_cap_flushsnap_ack(inode
, tid
, h
, session
);
3166 case CEPH_CAP_OP_EXPORT
:
3167 handle_cap_export(inode
, h
, peer
, session
);
3170 case CEPH_CAP_OP_IMPORT
:
3171 handle_cap_import(mdsc
, inode
, h
, peer
, session
,
3173 handle_cap_grant(mdsc
, inode
, h
, snaptrace
, snaptrace_len
,
3174 inline_version
, inline_data
, inline_len
,
3175 msg
->middle
, session
, cap
, issued
);
3179 /* the rest require a cap */
3180 spin_lock(&ci
->i_ceph_lock
);
3181 cap
= __get_cap_for_mds(ceph_inode(inode
), mds
);
3183 dout(" no cap on %p ino %llx.%llx from mds%d\n",
3184 inode
, ceph_ino(inode
), ceph_snap(inode
), mds
);
3185 spin_unlock(&ci
->i_ceph_lock
);
3186 goto flush_cap_releases
;
3189 /* note that each of these drops i_ceph_lock for us */
3191 case CEPH_CAP_OP_REVOKE
:
3192 case CEPH_CAP_OP_GRANT
:
3193 __ceph_caps_issued(ci
, &issued
);
3194 issued
|= __ceph_caps_dirty(ci
);
3195 handle_cap_grant(mdsc
, inode
, h
, NULL
, 0,
3196 inline_version
, inline_data
, inline_len
,
3197 msg
->middle
, session
, cap
, issued
);
3200 case CEPH_CAP_OP_FLUSH_ACK
:
3201 handle_cap_flush_ack(inode
, tid
, h
, session
, cap
);
3204 case CEPH_CAP_OP_TRUNC
:
3205 handle_cap_trunc(inode
, h
, session
);
3209 spin_unlock(&ci
->i_ceph_lock
);
3210 pr_err("ceph_handle_caps: unknown cap op %d %s\n", op
,
3211 ceph_cap_op_name(op
));
3218 * send any full release message to try to move things
3219 * along for the mds (who clearly thinks we still have this
3222 ceph_add_cap_releases(mdsc
, session
);
3223 ceph_send_cap_releases(mdsc
, session
);
3226 mutex_unlock(&session
->s_mutex
);
3232 pr_err("ceph_handle_caps: corrupt message\n");
3238 * Delayed work handler to process end of delayed cap release LRU list.
3240 void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
)
3242 struct ceph_inode_info
*ci
;
3243 int flags
= CHECK_CAPS_NODELAY
;
3245 dout("check_delayed_caps\n");
3247 spin_lock(&mdsc
->cap_delay_lock
);
3248 if (list_empty(&mdsc
->cap_delay_list
))
3250 ci
= list_first_entry(&mdsc
->cap_delay_list
,
3251 struct ceph_inode_info
,
3253 if ((ci
->i_ceph_flags
& CEPH_I_FLUSH
) == 0 &&
3254 time_before(jiffies
, ci
->i_hold_caps_max
))
3256 list_del_init(&ci
->i_cap_delay_list
);
3257 spin_unlock(&mdsc
->cap_delay_lock
);
3258 dout("check_delayed_caps on %p\n", &ci
->vfs_inode
);
3259 ceph_check_caps(ci
, flags
, NULL
);
3261 spin_unlock(&mdsc
->cap_delay_lock
);
3265 * Flush all dirty caps to the mds
3267 void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
)
3269 struct ceph_inode_info
*ci
;
3270 struct inode
*inode
;
3272 dout("flush_dirty_caps\n");
3273 spin_lock(&mdsc
->cap_dirty_lock
);
3274 while (!list_empty(&mdsc
->cap_dirty
)) {
3275 ci
= list_first_entry(&mdsc
->cap_dirty
, struct ceph_inode_info
,
3277 inode
= &ci
->vfs_inode
;
3279 dout("flush_dirty_caps %p\n", inode
);
3280 spin_unlock(&mdsc
->cap_dirty_lock
);
3281 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
|CHECK_CAPS_FLUSH
, NULL
);
3283 spin_lock(&mdsc
->cap_dirty_lock
);
3285 spin_unlock(&mdsc
->cap_dirty_lock
);
3286 dout("flush_dirty_caps done\n");
3290 * Drop open file reference. If we were the last open file,
3291 * we may need to release capabilities to the MDS (or schedule
3292 * their delayed release).
3294 void ceph_put_fmode(struct ceph_inode_info
*ci
, int fmode
)
3296 struct inode
*inode
= &ci
->vfs_inode
;
3299 spin_lock(&ci
->i_ceph_lock
);
3300 dout("put_fmode %p fmode %d %d -> %d\n", inode
, fmode
,
3301 ci
->i_nr_by_mode
[fmode
], ci
->i_nr_by_mode
[fmode
]-1);
3302 BUG_ON(ci
->i_nr_by_mode
[fmode
] == 0);
3303 if (--ci
->i_nr_by_mode
[fmode
] == 0)
3305 spin_unlock(&ci
->i_ceph_lock
);
3307 if (last
&& ci
->i_vino
.snap
== CEPH_NOSNAP
)
3308 ceph_check_caps(ci
, 0, NULL
);
3312 * Helpers for embedding cap and dentry lease releases into mds
3315 * @force is used by dentry_release (below) to force inclusion of a
3316 * record for the directory inode, even when there aren't any caps to
3319 int ceph_encode_inode_release(void **p
, struct inode
*inode
,
3320 int mds
, int drop
, int unless
, int force
)
3322 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3323 struct ceph_cap
*cap
;
3324 struct ceph_mds_request_release
*rel
= *p
;
3328 spin_lock(&ci
->i_ceph_lock
);
3329 used
= __ceph_caps_used(ci
);
3330 dirty
= __ceph_caps_dirty(ci
);
3332 dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n",
3333 inode
, mds
, ceph_cap_string(used
|dirty
), ceph_cap_string(drop
),
3334 ceph_cap_string(unless
));
3336 /* only drop unused, clean caps */
3337 drop
&= ~(used
| dirty
);
3339 cap
= __get_cap_for_mds(ci
, mds
);
3340 if (cap
&& __cap_is_valid(cap
)) {
3342 ((cap
->issued
& drop
) &&
3343 (cap
->issued
& unless
) == 0)) {
3344 if ((cap
->issued
& drop
) &&
3345 (cap
->issued
& unless
) == 0) {
3346 int wanted
= __ceph_caps_wanted(ci
);
3347 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0)
3348 wanted
|= cap
->mds_wanted
;
3349 dout("encode_inode_release %p cap %p "
3350 "%s -> %s, wanted %s -> %s\n", inode
, cap
,
3351 ceph_cap_string(cap
->issued
),
3352 ceph_cap_string(cap
->issued
& ~drop
),
3353 ceph_cap_string(cap
->mds_wanted
),
3354 ceph_cap_string(wanted
));
3356 cap
->issued
&= ~drop
;
3357 cap
->implemented
&= ~drop
;
3358 cap
->mds_wanted
= wanted
;
3360 dout("encode_inode_release %p cap %p %s"
3361 " (force)\n", inode
, cap
,
3362 ceph_cap_string(cap
->issued
));
3365 rel
->ino
= cpu_to_le64(ceph_ino(inode
));
3366 rel
->cap_id
= cpu_to_le64(cap
->cap_id
);
3367 rel
->seq
= cpu_to_le32(cap
->seq
);
3368 rel
->issue_seq
= cpu_to_le32(cap
->issue_seq
);
3369 rel
->mseq
= cpu_to_le32(cap
->mseq
);
3370 rel
->caps
= cpu_to_le32(cap
->implemented
);
3371 rel
->wanted
= cpu_to_le32(cap
->mds_wanted
);
3377 dout("encode_inode_release %p cap %p %s\n",
3378 inode
, cap
, ceph_cap_string(cap
->issued
));
3381 spin_unlock(&ci
->i_ceph_lock
);
3385 int ceph_encode_dentry_release(void **p
, struct dentry
*dentry
,
3386 int mds
, int drop
, int unless
)
3388 struct inode
*dir
= dentry
->d_parent
->d_inode
;
3389 struct ceph_mds_request_release
*rel
= *p
;
3390 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
3395 * force an record for the directory caps if we have a dentry lease.
3396 * this is racy (can't take i_ceph_lock and d_lock together), but it
3397 * doesn't have to be perfect; the mds will revoke anything we don't
3400 spin_lock(&dentry
->d_lock
);
3401 if (di
->lease_session
&& di
->lease_session
->s_mds
== mds
)
3403 spin_unlock(&dentry
->d_lock
);
3405 ret
= ceph_encode_inode_release(p
, dir
, mds
, drop
, unless
, force
);
3407 spin_lock(&dentry
->d_lock
);
3408 if (ret
&& di
->lease_session
&& di
->lease_session
->s_mds
== mds
) {
3409 dout("encode_dentry_release %p mds%d seq %d\n",
3410 dentry
, mds
, (int)di
->lease_seq
);
3411 rel
->dname_len
= cpu_to_le32(dentry
->d_name
.len
);
3412 memcpy(*p
, dentry
->d_name
.name
, dentry
->d_name
.len
);
3413 *p
+= dentry
->d_name
.len
;
3414 rel
->dname_seq
= cpu_to_le32(di
->lease_seq
);
3415 __ceph_mdsc_drop_dentry_lease(dentry
);
3417 spin_unlock(&dentry
->d_lock
);