1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ceph/ceph_debug.h>
5 #include <linux/kernel.h>
6 #include <linux/sched/signal.h>
7 #include <linux/slab.h>
8 #include <linux/vmalloc.h>
9 #include <linux/wait.h>
10 #include <linux/writeback.h>
13 #include "mds_client.h"
15 #include <linux/ceph/decode.h>
16 #include <linux/ceph/messenger.h>
19 * Capability management
21 * The Ceph metadata servers control client access to inode metadata
22 * and file data by issuing capabilities, granting clients permission
23 * to read and/or write both inode field and file data to OSDs
24 * (storage nodes). Each capability consists of a set of bits
25 * indicating which operations are allowed.
27 * If the client holds a *_SHARED cap, the client has a coherent value
28 * that can be safely read from the cached inode.
30 * In the case of a *_EXCL (exclusive) or FILE_WR capabilities, the
31 * client is allowed to change inode attributes (e.g., file size,
32 * mtime), note its dirty state in the ceph_cap, and asynchronously
33 * flush that metadata change to the MDS.
35 * In the event of a conflicting operation (perhaps by another
36 * client), the MDS will revoke the conflicting client capabilities.
38 * In order for a client to cache an inode, it must hold a capability
39 * with at least one MDS server. When inodes are released, release
40 * notifications are batched and periodically sent en masse to the MDS
41 * cluster to release server state.
44 static u64
__get_oldest_flush_tid(struct ceph_mds_client
*mdsc
);
45 static void __kick_flushing_caps(struct ceph_mds_client
*mdsc
,
46 struct ceph_mds_session
*session
,
47 struct ceph_inode_info
*ci
,
48 u64 oldest_flush_tid
);
51 * Generate readable cap strings for debugging output.
53 #define MAX_CAP_STR 20
54 static char cap_str
[MAX_CAP_STR
][40];
55 static DEFINE_SPINLOCK(cap_str_lock
);
56 static int last_cap_str
;
58 static char *gcap_string(char *s
, int c
)
60 if (c
& CEPH_CAP_GSHARED
)
62 if (c
& CEPH_CAP_GEXCL
)
64 if (c
& CEPH_CAP_GCACHE
)
70 if (c
& CEPH_CAP_GBUFFER
)
72 if (c
& CEPH_CAP_GWREXTEND
)
74 if (c
& CEPH_CAP_GLAZYIO
)
79 const char *ceph_cap_string(int caps
)
85 spin_lock(&cap_str_lock
);
87 if (last_cap_str
== MAX_CAP_STR
)
89 spin_unlock(&cap_str_lock
);
93 if (caps
& CEPH_CAP_PIN
)
96 c
= (caps
>> CEPH_CAP_SAUTH
) & 3;
99 s
= gcap_string(s
, c
);
102 c
= (caps
>> CEPH_CAP_SLINK
) & 3;
105 s
= gcap_string(s
, c
);
108 c
= (caps
>> CEPH_CAP_SXATTR
) & 3;
111 s
= gcap_string(s
, c
);
114 c
= caps
>> CEPH_CAP_SFILE
;
117 s
= gcap_string(s
, c
);
126 void ceph_caps_init(struct ceph_mds_client
*mdsc
)
128 INIT_LIST_HEAD(&mdsc
->caps_list
);
129 spin_lock_init(&mdsc
->caps_list_lock
);
132 void ceph_caps_finalize(struct ceph_mds_client
*mdsc
)
134 struct ceph_cap
*cap
;
136 spin_lock(&mdsc
->caps_list_lock
);
137 while (!list_empty(&mdsc
->caps_list
)) {
138 cap
= list_first_entry(&mdsc
->caps_list
,
139 struct ceph_cap
, caps_item
);
140 list_del(&cap
->caps_item
);
141 kmem_cache_free(ceph_cap_cachep
, cap
);
143 mdsc
->caps_total_count
= 0;
144 mdsc
->caps_avail_count
= 0;
145 mdsc
->caps_use_count
= 0;
146 mdsc
->caps_reserve_count
= 0;
147 mdsc
->caps_min_count
= 0;
148 spin_unlock(&mdsc
->caps_list_lock
);
151 void ceph_adjust_min_caps(struct ceph_mds_client
*mdsc
, int delta
)
153 spin_lock(&mdsc
->caps_list_lock
);
154 mdsc
->caps_min_count
+= delta
;
155 BUG_ON(mdsc
->caps_min_count
< 0);
156 spin_unlock(&mdsc
->caps_list_lock
);
159 static void __ceph_unreserve_caps(struct ceph_mds_client
*mdsc
, int nr_caps
)
161 struct ceph_cap
*cap
;
165 BUG_ON(mdsc
->caps_reserve_count
< nr_caps
);
166 mdsc
->caps_reserve_count
-= nr_caps
;
167 if (mdsc
->caps_avail_count
>=
168 mdsc
->caps_reserve_count
+ mdsc
->caps_min_count
) {
169 mdsc
->caps_total_count
-= nr_caps
;
170 for (i
= 0; i
< nr_caps
; i
++) {
171 cap
= list_first_entry(&mdsc
->caps_list
,
172 struct ceph_cap
, caps_item
);
173 list_del(&cap
->caps_item
);
174 kmem_cache_free(ceph_cap_cachep
, cap
);
177 mdsc
->caps_avail_count
+= nr_caps
;
180 dout("%s: caps %d = %d used + %d resv + %d avail\n",
182 mdsc
->caps_total_count
, mdsc
->caps_use_count
,
183 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
184 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
185 mdsc
->caps_reserve_count
+
186 mdsc
->caps_avail_count
);
191 * Called under mdsc->mutex.
193 int ceph_reserve_caps(struct ceph_mds_client
*mdsc
,
194 struct ceph_cap_reservation
*ctx
, int need
)
197 struct ceph_cap
*cap
;
202 bool trimmed
= false;
203 struct ceph_mds_session
*s
;
206 dout("reserve caps ctx=%p need=%d\n", ctx
, need
);
208 /* first reserve any caps that are already allocated */
209 spin_lock(&mdsc
->caps_list_lock
);
210 if (mdsc
->caps_avail_count
>= need
)
213 have
= mdsc
->caps_avail_count
;
214 mdsc
->caps_avail_count
-= have
;
215 mdsc
->caps_reserve_count
+= have
;
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
);
221 for (i
= have
; i
< need
; ) {
222 cap
= kmem_cache_alloc(ceph_cap_cachep
, GFP_NOFS
);
224 list_add(&cap
->caps_item
, &newcaps
);
231 for (j
= 0; j
< mdsc
->max_sessions
; j
++) {
232 s
= __ceph_lookup_mds_session(mdsc
, j
);
235 mutex_unlock(&mdsc
->mutex
);
237 mutex_lock(&s
->s_mutex
);
238 max_caps
= s
->s_nr_caps
- (need
- i
);
239 ceph_trim_caps(mdsc
, s
, max_caps
);
240 mutex_unlock(&s
->s_mutex
);
242 ceph_put_mds_session(s
);
243 mutex_lock(&mdsc
->mutex
);
247 spin_lock(&mdsc
->caps_list_lock
);
248 if (mdsc
->caps_avail_count
) {
250 if (mdsc
->caps_avail_count
>= need
- i
)
251 more_have
= need
- i
;
253 more_have
= mdsc
->caps_avail_count
;
257 mdsc
->caps_avail_count
-= more_have
;
258 mdsc
->caps_reserve_count
+= more_have
;
261 spin_unlock(&mdsc
->caps_list_lock
);
266 pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n",
267 ctx
, need
, have
+ alloc
);
273 BUG_ON(have
+ alloc
!= need
);
277 spin_lock(&mdsc
->caps_list_lock
);
278 mdsc
->caps_total_count
+= alloc
;
279 mdsc
->caps_reserve_count
+= alloc
;
280 list_splice(&newcaps
, &mdsc
->caps_list
);
282 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
283 mdsc
->caps_reserve_count
+
284 mdsc
->caps_avail_count
);
287 __ceph_unreserve_caps(mdsc
, have
+ alloc
);
289 spin_unlock(&mdsc
->caps_list_lock
);
291 dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n",
292 ctx
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
293 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
297 void ceph_unreserve_caps(struct ceph_mds_client
*mdsc
,
298 struct ceph_cap_reservation
*ctx
)
300 dout("unreserve caps ctx=%p count=%d\n", ctx
, ctx
->count
);
301 spin_lock(&mdsc
->caps_list_lock
);
302 __ceph_unreserve_caps(mdsc
, ctx
->count
);
304 spin_unlock(&mdsc
->caps_list_lock
);
307 struct ceph_cap
*ceph_get_cap(struct ceph_mds_client
*mdsc
,
308 struct ceph_cap_reservation
*ctx
)
310 struct ceph_cap
*cap
= NULL
;
312 /* temporary, until we do something about cap import/export */
314 cap
= kmem_cache_alloc(ceph_cap_cachep
, GFP_NOFS
);
316 spin_lock(&mdsc
->caps_list_lock
);
317 mdsc
->caps_use_count
++;
318 mdsc
->caps_total_count
++;
319 spin_unlock(&mdsc
->caps_list_lock
);
321 spin_lock(&mdsc
->caps_list_lock
);
322 if (mdsc
->caps_avail_count
) {
323 BUG_ON(list_empty(&mdsc
->caps_list
));
325 mdsc
->caps_avail_count
--;
326 mdsc
->caps_use_count
++;
327 cap
= list_first_entry(&mdsc
->caps_list
,
328 struct ceph_cap
, caps_item
);
329 list_del(&cap
->caps_item
);
331 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
332 mdsc
->caps_reserve_count
+ mdsc
->caps_avail_count
);
334 spin_unlock(&mdsc
->caps_list_lock
);
340 spin_lock(&mdsc
->caps_list_lock
);
341 dout("get_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n",
342 ctx
, ctx
->count
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
343 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
345 BUG_ON(ctx
->count
> mdsc
->caps_reserve_count
);
346 BUG_ON(list_empty(&mdsc
->caps_list
));
349 mdsc
->caps_reserve_count
--;
350 mdsc
->caps_use_count
++;
352 cap
= list_first_entry(&mdsc
->caps_list
, struct ceph_cap
, caps_item
);
353 list_del(&cap
->caps_item
);
355 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
356 mdsc
->caps_reserve_count
+ mdsc
->caps_avail_count
);
357 spin_unlock(&mdsc
->caps_list_lock
);
361 void ceph_put_cap(struct ceph_mds_client
*mdsc
, struct ceph_cap
*cap
)
363 spin_lock(&mdsc
->caps_list_lock
);
364 dout("put_cap %p %d = %d used + %d resv + %d avail\n",
365 cap
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
366 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
367 mdsc
->caps_use_count
--;
369 * Keep some preallocated caps around (ceph_min_count), to
370 * avoid lots of free/alloc churn.
372 if (mdsc
->caps_avail_count
>= mdsc
->caps_reserve_count
+
373 mdsc
->caps_min_count
) {
374 mdsc
->caps_total_count
--;
375 kmem_cache_free(ceph_cap_cachep
, cap
);
377 mdsc
->caps_avail_count
++;
378 list_add(&cap
->caps_item
, &mdsc
->caps_list
);
381 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
382 mdsc
->caps_reserve_count
+ mdsc
->caps_avail_count
);
383 spin_unlock(&mdsc
->caps_list_lock
);
386 void ceph_reservation_status(struct ceph_fs_client
*fsc
,
387 int *total
, int *avail
, int *used
, int *reserved
,
390 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
392 spin_lock(&mdsc
->caps_list_lock
);
395 *total
= mdsc
->caps_total_count
;
397 *avail
= mdsc
->caps_avail_count
;
399 *used
= mdsc
->caps_use_count
;
401 *reserved
= mdsc
->caps_reserve_count
;
403 *min
= mdsc
->caps_min_count
;
405 spin_unlock(&mdsc
->caps_list_lock
);
409 * Find ceph_cap for given mds, if any.
411 * Called with i_ceph_lock held.
413 static struct ceph_cap
*__get_cap_for_mds(struct ceph_inode_info
*ci
, int mds
)
415 struct ceph_cap
*cap
;
416 struct rb_node
*n
= ci
->i_caps
.rb_node
;
419 cap
= rb_entry(n
, struct ceph_cap
, ci_node
);
422 else if (mds
> cap
->mds
)
430 struct ceph_cap
*ceph_get_cap_for_mds(struct ceph_inode_info
*ci
, int mds
)
432 struct ceph_cap
*cap
;
434 spin_lock(&ci
->i_ceph_lock
);
435 cap
= __get_cap_for_mds(ci
, mds
);
436 spin_unlock(&ci
->i_ceph_lock
);
441 * Return id of any MDS with a cap, preferably FILE_WR|BUFFER|EXCL, else -1.
443 static int __ceph_get_cap_mds(struct ceph_inode_info
*ci
)
445 struct ceph_cap
*cap
;
449 /* prefer mds with WR|BUFFER|EXCL caps */
450 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
451 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
453 if (cap
->issued
& (CEPH_CAP_FILE_WR
|
454 CEPH_CAP_FILE_BUFFER
|
461 int ceph_get_cap_mds(struct inode
*inode
)
463 struct ceph_inode_info
*ci
= ceph_inode(inode
);
465 spin_lock(&ci
->i_ceph_lock
);
466 mds
= __ceph_get_cap_mds(ceph_inode(inode
));
467 spin_unlock(&ci
->i_ceph_lock
);
472 * Called under i_ceph_lock.
474 static void __insert_cap_node(struct ceph_inode_info
*ci
,
475 struct ceph_cap
*new)
477 struct rb_node
**p
= &ci
->i_caps
.rb_node
;
478 struct rb_node
*parent
= NULL
;
479 struct ceph_cap
*cap
= NULL
;
483 cap
= rb_entry(parent
, struct ceph_cap
, ci_node
);
484 if (new->mds
< cap
->mds
)
486 else if (new->mds
> cap
->mds
)
492 rb_link_node(&new->ci_node
, parent
, p
);
493 rb_insert_color(&new->ci_node
, &ci
->i_caps
);
497 * (re)set cap hold timeouts, which control the delayed release
498 * of unused caps back to the MDS. Should be called on cap use.
500 static void __cap_set_timeouts(struct ceph_mds_client
*mdsc
,
501 struct ceph_inode_info
*ci
)
503 struct ceph_mount_options
*ma
= mdsc
->fsc
->mount_options
;
505 ci
->i_hold_caps_min
= round_jiffies(jiffies
+
506 ma
->caps_wanted_delay_min
* HZ
);
507 ci
->i_hold_caps_max
= round_jiffies(jiffies
+
508 ma
->caps_wanted_delay_max
* HZ
);
509 dout("__cap_set_timeouts %p min %lu max %lu\n", &ci
->vfs_inode
,
510 ci
->i_hold_caps_min
- jiffies
, ci
->i_hold_caps_max
- jiffies
);
514 * (Re)queue cap at the end of the delayed cap release list.
516 * If I_FLUSH is set, leave the inode at the front of the list.
518 * Caller holds i_ceph_lock
519 * -> we take mdsc->cap_delay_lock
521 static void __cap_delay_requeue(struct ceph_mds_client
*mdsc
,
522 struct ceph_inode_info
*ci
,
525 dout("__cap_delay_requeue %p flags %d at %lu\n", &ci
->vfs_inode
,
526 ci
->i_ceph_flags
, ci
->i_hold_caps_max
);
527 if (!mdsc
->stopping
) {
528 spin_lock(&mdsc
->cap_delay_lock
);
529 if (!list_empty(&ci
->i_cap_delay_list
)) {
530 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
532 list_del_init(&ci
->i_cap_delay_list
);
535 __cap_set_timeouts(mdsc
, ci
);
536 list_add_tail(&ci
->i_cap_delay_list
, &mdsc
->cap_delay_list
);
538 spin_unlock(&mdsc
->cap_delay_lock
);
543 * Queue an inode for immediate writeback. Mark inode with I_FLUSH,
544 * indicating we should send a cap message to flush dirty metadata
545 * asap, and move to the front of the delayed cap list.
547 static void __cap_delay_requeue_front(struct ceph_mds_client
*mdsc
,
548 struct ceph_inode_info
*ci
)
550 dout("__cap_delay_requeue_front %p\n", &ci
->vfs_inode
);
551 spin_lock(&mdsc
->cap_delay_lock
);
552 ci
->i_ceph_flags
|= CEPH_I_FLUSH
;
553 if (!list_empty(&ci
->i_cap_delay_list
))
554 list_del_init(&ci
->i_cap_delay_list
);
555 list_add(&ci
->i_cap_delay_list
, &mdsc
->cap_delay_list
);
556 spin_unlock(&mdsc
->cap_delay_lock
);
560 * Cancel delayed work on cap.
562 * Caller must hold i_ceph_lock.
564 static void __cap_delay_cancel(struct ceph_mds_client
*mdsc
,
565 struct ceph_inode_info
*ci
)
567 dout("__cap_delay_cancel %p\n", &ci
->vfs_inode
);
568 if (list_empty(&ci
->i_cap_delay_list
))
570 spin_lock(&mdsc
->cap_delay_lock
);
571 list_del_init(&ci
->i_cap_delay_list
);
572 spin_unlock(&mdsc
->cap_delay_lock
);
576 * Common issue checks for add_cap, handle_cap_grant.
578 static void __check_cap_issue(struct ceph_inode_info
*ci
, struct ceph_cap
*cap
,
581 unsigned had
= __ceph_caps_issued(ci
, NULL
);
584 * Each time we receive FILE_CACHE anew, we increment
587 if ((issued
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) &&
588 (had
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) == 0) {
593 * If FILE_SHARED is newly issued, mark dir not complete. We don't
594 * know what happened to this directory while we didn't have the cap.
595 * If FILE_SHARED is being revoked, also mark dir not complete. It
596 * stops on-going cached readdir.
598 if ((issued
& CEPH_CAP_FILE_SHARED
) != (had
& CEPH_CAP_FILE_SHARED
)) {
599 if (issued
& CEPH_CAP_FILE_SHARED
)
600 atomic_inc(&ci
->i_shared_gen
);
601 if (S_ISDIR(ci
->vfs_inode
.i_mode
)) {
602 dout(" marking %p NOT complete\n", &ci
->vfs_inode
);
603 __ceph_dir_clear_complete(ci
);
609 * Add a capability under the given MDS session.
611 * Caller should hold session snap_rwsem (read) and s_mutex.
613 * @fmode is the open file mode, if we are opening a file, otherwise
614 * it is < 0. (This is so we can atomically add the cap and add an
615 * open file reference to it.)
617 void ceph_add_cap(struct inode
*inode
,
618 struct ceph_mds_session
*session
, u64 cap_id
,
619 int fmode
, unsigned issued
, unsigned wanted
,
620 unsigned seq
, unsigned mseq
, u64 realmino
, int flags
,
621 struct ceph_cap
**new_cap
)
623 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
624 struct ceph_inode_info
*ci
= ceph_inode(inode
);
625 struct ceph_cap
*cap
;
626 int mds
= session
->s_mds
;
629 dout("add_cap %p mds%d cap %llx %s seq %d\n", inode
,
630 session
->s_mds
, cap_id
, ceph_cap_string(issued
), seq
);
633 * If we are opening the file, include file mode wanted bits
637 wanted
|= ceph_caps_for_mode(fmode
);
639 cap
= __get_cap_for_mds(ci
, mds
);
645 cap
->implemented
= 0;
651 __insert_cap_node(ci
, cap
);
653 /* add to session cap list */
654 cap
->session
= session
;
655 spin_lock(&session
->s_cap_lock
);
656 list_add_tail(&cap
->session_caps
, &session
->s_caps
);
657 session
->s_nr_caps
++;
658 spin_unlock(&session
->s_cap_lock
);
660 if (cap
->cap_gen
< session
->s_cap_gen
)
661 cap
->issued
= cap
->implemented
= CEPH_CAP_PIN
;
664 * auth mds of the inode changed. we received the cap export
665 * message, but still haven't received the cap import message.
666 * handle_cap_export() updated the new auth MDS' cap.
668 * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing
669 * a message that was send before the cap import message. So
672 if (ceph_seq_cmp(seq
, cap
->seq
) <= 0) {
673 WARN_ON(cap
!= ci
->i_auth_cap
);
674 WARN_ON(cap
->cap_id
!= cap_id
);
677 issued
|= cap
->issued
;
678 flags
|= CEPH_CAP_FLAG_AUTH
;
682 if (!ci
->i_snap_realm
||
683 ((flags
& CEPH_CAP_FLAG_AUTH
) &&
684 realmino
!= (u64
)-1 && ci
->i_snap_realm
->ino
!= realmino
)) {
686 * add this inode to the appropriate snap realm
688 struct ceph_snap_realm
*realm
= ceph_lookup_snap_realm(mdsc
,
691 struct ceph_snap_realm
*oldrealm
= ci
->i_snap_realm
;
693 spin_lock(&oldrealm
->inodes_with_caps_lock
);
694 list_del_init(&ci
->i_snap_realm_item
);
695 spin_unlock(&oldrealm
->inodes_with_caps_lock
);
698 spin_lock(&realm
->inodes_with_caps_lock
);
699 list_add(&ci
->i_snap_realm_item
,
700 &realm
->inodes_with_caps
);
701 ci
->i_snap_realm
= realm
;
702 if (realm
->ino
== ci
->i_vino
.ino
)
703 realm
->inode
= inode
;
704 spin_unlock(&realm
->inodes_with_caps_lock
);
707 ceph_put_snap_realm(mdsc
, oldrealm
);
709 pr_err("ceph_add_cap: couldn't find snap realm %llx\n",
715 __check_cap_issue(ci
, cap
, issued
);
718 * If we are issued caps we don't want, or the mds' wanted
719 * value appears to be off, queue a check so we'll release
720 * later and/or update the mds wanted value.
722 actual_wanted
= __ceph_caps_wanted(ci
);
723 if ((wanted
& ~actual_wanted
) ||
724 (issued
& ~actual_wanted
& CEPH_CAP_ANY_WR
)) {
725 dout(" issued %s, mds wanted %s, actual %s, queueing\n",
726 ceph_cap_string(issued
), ceph_cap_string(wanted
),
727 ceph_cap_string(actual_wanted
));
728 __cap_delay_requeue(mdsc
, ci
, true);
731 if (flags
& CEPH_CAP_FLAG_AUTH
) {
732 if (!ci
->i_auth_cap
||
733 ceph_seq_cmp(ci
->i_auth_cap
->mseq
, mseq
) < 0) {
734 ci
->i_auth_cap
= cap
;
735 cap
->mds_wanted
= wanted
;
738 WARN_ON(ci
->i_auth_cap
== cap
);
741 dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n",
742 inode
, ceph_vinop(inode
), cap
, ceph_cap_string(issued
),
743 ceph_cap_string(issued
|cap
->issued
), seq
, mds
);
744 cap
->cap_id
= cap_id
;
745 cap
->issued
= issued
;
746 cap
->implemented
|= issued
;
747 if (ceph_seq_cmp(mseq
, cap
->mseq
) > 0)
748 cap
->mds_wanted
= wanted
;
750 cap
->mds_wanted
|= wanted
;
752 cap
->issue_seq
= seq
;
754 cap
->cap_gen
= session
->s_cap_gen
;
757 __ceph_get_fmode(ci
, fmode
);
761 * Return true if cap has not timed out and belongs to the current
762 * generation of the MDS session (i.e. has not gone 'stale' due to
763 * us losing touch with the mds).
765 static int __cap_is_valid(struct ceph_cap
*cap
)
770 spin_lock(&cap
->session
->s_gen_ttl_lock
);
771 gen
= cap
->session
->s_cap_gen
;
772 ttl
= cap
->session
->s_cap_ttl
;
773 spin_unlock(&cap
->session
->s_gen_ttl_lock
);
775 if (cap
->cap_gen
< gen
|| time_after_eq(jiffies
, ttl
)) {
776 dout("__cap_is_valid %p cap %p issued %s "
777 "but STALE (gen %u vs %u)\n", &cap
->ci
->vfs_inode
,
778 cap
, ceph_cap_string(cap
->issued
), cap
->cap_gen
, gen
);
786 * Return set of valid cap bits issued to us. Note that caps time
787 * out, and may be invalidated in bulk if the client session times out
788 * and session->s_cap_gen is bumped.
790 int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
)
792 int have
= ci
->i_snap_caps
;
793 struct ceph_cap
*cap
;
798 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
799 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
800 if (!__cap_is_valid(cap
))
802 dout("__ceph_caps_issued %p cap %p issued %s\n",
803 &ci
->vfs_inode
, cap
, ceph_cap_string(cap
->issued
));
806 *implemented
|= cap
->implemented
;
809 * exclude caps issued by non-auth MDS, but are been revoking
810 * by the auth MDS. The non-auth MDS should be revoking/exporting
811 * these caps, but the message is delayed.
813 if (ci
->i_auth_cap
) {
814 cap
= ci
->i_auth_cap
;
815 have
&= ~cap
->implemented
| cap
->issued
;
821 * Get cap bits issued by caps other than @ocap
823 int __ceph_caps_issued_other(struct ceph_inode_info
*ci
, struct ceph_cap
*ocap
)
825 int have
= ci
->i_snap_caps
;
826 struct ceph_cap
*cap
;
829 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
830 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
833 if (!__cap_is_valid(cap
))
841 * Move a cap to the end of the LRU (oldest caps at list head, newest
844 static void __touch_cap(struct ceph_cap
*cap
)
846 struct ceph_mds_session
*s
= cap
->session
;
848 spin_lock(&s
->s_cap_lock
);
849 if (!s
->s_cap_iterator
) {
850 dout("__touch_cap %p cap %p mds%d\n", &cap
->ci
->vfs_inode
, cap
,
852 list_move_tail(&cap
->session_caps
, &s
->s_caps
);
854 dout("__touch_cap %p cap %p mds%d NOP, iterating over caps\n",
855 &cap
->ci
->vfs_inode
, cap
, s
->s_mds
);
857 spin_unlock(&s
->s_cap_lock
);
861 * Check if we hold the given mask. If so, move the cap(s) to the
862 * front of their respective LRUs. (This is the preferred way for
863 * callers to check for caps they want.)
865 int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int touch
)
867 struct ceph_cap
*cap
;
869 int have
= ci
->i_snap_caps
;
871 if ((have
& mask
) == mask
) {
872 dout("__ceph_caps_issued_mask %p snap issued %s"
873 " (mask %s)\n", &ci
->vfs_inode
,
874 ceph_cap_string(have
),
875 ceph_cap_string(mask
));
879 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
880 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
881 if (!__cap_is_valid(cap
))
883 if ((cap
->issued
& mask
) == mask
) {
884 dout("__ceph_caps_issued_mask %p cap %p issued %s"
885 " (mask %s)\n", &ci
->vfs_inode
, cap
,
886 ceph_cap_string(cap
->issued
),
887 ceph_cap_string(mask
));
893 /* does a combination of caps satisfy mask? */
895 if ((have
& mask
) == mask
) {
896 dout("__ceph_caps_issued_mask %p combo issued %s"
897 " (mask %s)\n", &ci
->vfs_inode
,
898 ceph_cap_string(cap
->issued
),
899 ceph_cap_string(mask
));
903 /* touch this + preceding caps */
905 for (q
= rb_first(&ci
->i_caps
); q
!= p
;
907 cap
= rb_entry(q
, struct ceph_cap
,
909 if (!__cap_is_valid(cap
))
922 * Return true if mask caps are currently being revoked by an MDS.
924 int __ceph_caps_revoking_other(struct ceph_inode_info
*ci
,
925 struct ceph_cap
*ocap
, int mask
)
927 struct ceph_cap
*cap
;
930 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
931 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
933 (cap
->implemented
& ~cap
->issued
& mask
))
939 int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
)
941 struct inode
*inode
= &ci
->vfs_inode
;
944 spin_lock(&ci
->i_ceph_lock
);
945 ret
= __ceph_caps_revoking_other(ci
, NULL
, mask
);
946 spin_unlock(&ci
->i_ceph_lock
);
947 dout("ceph_caps_revoking %p %s = %d\n", inode
,
948 ceph_cap_string(mask
), ret
);
952 int __ceph_caps_used(struct ceph_inode_info
*ci
)
956 used
|= CEPH_CAP_PIN
;
958 used
|= CEPH_CAP_FILE_RD
;
959 if (ci
->i_rdcache_ref
||
960 (!S_ISDIR(ci
->vfs_inode
.i_mode
) && /* ignore readdir cache */
961 ci
->vfs_inode
.i_data
.nrpages
))
962 used
|= CEPH_CAP_FILE_CACHE
;
964 used
|= CEPH_CAP_FILE_WR
;
965 if (ci
->i_wb_ref
|| ci
->i_wrbuffer_ref
)
966 used
|= CEPH_CAP_FILE_BUFFER
;
971 * wanted, by virtue of open file modes
973 int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
)
976 for (i
= 0; i
< CEPH_FILE_MODE_BITS
; i
++) {
977 if (ci
->i_nr_by_mode
[i
])
982 return ceph_caps_for_mode(bits
>> 1);
986 * Return caps we have registered with the MDS(s) as 'wanted'.
988 int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
, bool check
)
990 struct ceph_cap
*cap
;
994 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
995 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
996 if (check
&& !__cap_is_valid(cap
))
998 if (cap
== ci
->i_auth_cap
)
999 mds_wanted
|= cap
->mds_wanted
;
1001 mds_wanted
|= (cap
->mds_wanted
& ~CEPH_CAP_ANY_FILE_WR
);
1007 * called under i_ceph_lock
1009 static int __ceph_is_single_caps(struct ceph_inode_info
*ci
)
1011 return rb_first(&ci
->i_caps
) == rb_last(&ci
->i_caps
);
1014 static int __ceph_is_any_caps(struct ceph_inode_info
*ci
)
1016 return !RB_EMPTY_ROOT(&ci
->i_caps
);
1019 int ceph_is_any_caps(struct inode
*inode
)
1021 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1024 spin_lock(&ci
->i_ceph_lock
);
1025 ret
= __ceph_is_any_caps(ci
);
1026 spin_unlock(&ci
->i_ceph_lock
);
1031 static void drop_inode_snap_realm(struct ceph_inode_info
*ci
)
1033 struct ceph_snap_realm
*realm
= ci
->i_snap_realm
;
1034 spin_lock(&realm
->inodes_with_caps_lock
);
1035 list_del_init(&ci
->i_snap_realm_item
);
1036 ci
->i_snap_realm_counter
++;
1037 ci
->i_snap_realm
= NULL
;
1038 if (realm
->ino
== ci
->i_vino
.ino
)
1039 realm
->inode
= NULL
;
1040 spin_unlock(&realm
->inodes_with_caps_lock
);
1041 ceph_put_snap_realm(ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
,
1046 * Remove a cap. Take steps to deal with a racing iterate_session_caps.
1048 * caller should hold i_ceph_lock.
1049 * caller will not hold session s_mutex if called from destroy_inode.
1051 void __ceph_remove_cap(struct ceph_cap
*cap
, bool queue_release
)
1053 struct ceph_mds_session
*session
= cap
->session
;
1054 struct ceph_inode_info
*ci
= cap
->ci
;
1055 struct ceph_mds_client
*mdsc
=
1056 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
1059 dout("__ceph_remove_cap %p from %p\n", cap
, &ci
->vfs_inode
);
1061 /* remove from session list */
1062 spin_lock(&session
->s_cap_lock
);
1063 if (session
->s_cap_iterator
== cap
) {
1064 /* not yet, we are iterating over this very cap */
1065 dout("__ceph_remove_cap delaying %p removal from session %p\n",
1068 list_del_init(&cap
->session_caps
);
1069 session
->s_nr_caps
--;
1070 cap
->session
= NULL
;
1073 /* protect backpointer with s_cap_lock: see iterate_session_caps */
1077 * s_cap_reconnect is protected by s_cap_lock. no one changes
1078 * s_cap_gen while session is in the reconnect state.
1080 if (queue_release
&&
1081 (!session
->s_cap_reconnect
|| cap
->cap_gen
== session
->s_cap_gen
)) {
1082 cap
->queue_release
= 1;
1084 list_add_tail(&cap
->session_caps
,
1085 &session
->s_cap_releases
);
1086 session
->s_num_cap_releases
++;
1090 cap
->queue_release
= 0;
1092 cap
->cap_ino
= ci
->i_vino
.ino
;
1094 spin_unlock(&session
->s_cap_lock
);
1096 /* remove from inode list */
1097 rb_erase(&cap
->ci_node
, &ci
->i_caps
);
1098 if (ci
->i_auth_cap
== cap
)
1099 ci
->i_auth_cap
= NULL
;
1102 ceph_put_cap(mdsc
, cap
);
1104 /* when reconnect denied, we remove session caps forcibly,
1105 * i_wr_ref can be non-zero. If there are ongoing write,
1106 * keep i_snap_realm.
1108 if (!__ceph_is_any_caps(ci
) && ci
->i_wr_ref
== 0 && ci
->i_snap_realm
)
1109 drop_inode_snap_realm(ci
);
1111 if (!__ceph_is_any_real_caps(ci
))
1112 __cap_delay_cancel(mdsc
, ci
);
1115 struct cap_msg_args
{
1116 struct ceph_mds_session
*session
;
1117 u64 ino
, cid
, follows
;
1118 u64 flush_tid
, oldest_flush_tid
, size
, max_size
;
1120 struct ceph_buffer
*xattr_buf
;
1121 struct timespec64 atime
, mtime
, ctime
;
1122 int op
, caps
, wanted
, dirty
;
1123 u32 seq
, issue_seq
, mseq
, time_warp_seq
;
1132 * Build and send a cap message to the given MDS.
1134 * Caller should be holding s_mutex.
1136 static int send_cap_msg(struct cap_msg_args
*arg
)
1138 struct ceph_mds_caps
*fc
;
1139 struct ceph_msg
*msg
;
1142 struct timespec64 zerotime
= {0};
1143 struct ceph_osd_client
*osdc
= &arg
->session
->s_mdsc
->fsc
->client
->osdc
;
1145 dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s"
1146 " seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu"
1147 " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(arg
->op
),
1148 arg
->cid
, arg
->ino
, ceph_cap_string(arg
->caps
),
1149 ceph_cap_string(arg
->wanted
), ceph_cap_string(arg
->dirty
),
1150 arg
->seq
, arg
->issue_seq
, arg
->flush_tid
, arg
->oldest_flush_tid
,
1151 arg
->mseq
, arg
->follows
, arg
->size
, arg
->max_size
,
1153 arg
->xattr_buf
? (int)arg
->xattr_buf
->vec
.iov_len
: 0);
1155 /* flock buffer size + inline version + inline data size +
1156 * osd_epoch_barrier + oldest_flush_tid */
1157 extra_len
= 4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4;
1158 msg
= ceph_msg_new(CEPH_MSG_CLIENT_CAPS
, sizeof(*fc
) + extra_len
,
1163 msg
->hdr
.version
= cpu_to_le16(10);
1164 msg
->hdr
.tid
= cpu_to_le64(arg
->flush_tid
);
1166 fc
= msg
->front
.iov_base
;
1167 memset(fc
, 0, sizeof(*fc
));
1169 fc
->cap_id
= cpu_to_le64(arg
->cid
);
1170 fc
->op
= cpu_to_le32(arg
->op
);
1171 fc
->seq
= cpu_to_le32(arg
->seq
);
1172 fc
->issue_seq
= cpu_to_le32(arg
->issue_seq
);
1173 fc
->migrate_seq
= cpu_to_le32(arg
->mseq
);
1174 fc
->caps
= cpu_to_le32(arg
->caps
);
1175 fc
->wanted
= cpu_to_le32(arg
->wanted
);
1176 fc
->dirty
= cpu_to_le32(arg
->dirty
);
1177 fc
->ino
= cpu_to_le64(arg
->ino
);
1178 fc
->snap_follows
= cpu_to_le64(arg
->follows
);
1180 fc
->size
= cpu_to_le64(arg
->size
);
1181 fc
->max_size
= cpu_to_le64(arg
->max_size
);
1182 ceph_encode_timespec64(&fc
->mtime
, &arg
->mtime
);
1183 ceph_encode_timespec64(&fc
->atime
, &arg
->atime
);
1184 ceph_encode_timespec64(&fc
->ctime
, &arg
->ctime
);
1185 fc
->time_warp_seq
= cpu_to_le32(arg
->time_warp_seq
);
1187 fc
->uid
= cpu_to_le32(from_kuid(&init_user_ns
, arg
->uid
));
1188 fc
->gid
= cpu_to_le32(from_kgid(&init_user_ns
, arg
->gid
));
1189 fc
->mode
= cpu_to_le32(arg
->mode
);
1191 fc
->xattr_version
= cpu_to_le64(arg
->xattr_version
);
1192 if (arg
->xattr_buf
) {
1193 msg
->middle
= ceph_buffer_get(arg
->xattr_buf
);
1194 fc
->xattr_len
= cpu_to_le32(arg
->xattr_buf
->vec
.iov_len
);
1195 msg
->hdr
.middle_len
= cpu_to_le32(arg
->xattr_buf
->vec
.iov_len
);
1199 /* flock buffer size (version 2) */
1200 ceph_encode_32(&p
, 0);
1201 /* inline version (version 4) */
1202 ceph_encode_64(&p
, arg
->inline_data
? 0 : CEPH_INLINE_NONE
);
1203 /* inline data size */
1204 ceph_encode_32(&p
, 0);
1206 * osd_epoch_barrier (version 5)
1207 * The epoch_barrier is protected osdc->lock, so READ_ONCE here in
1208 * case it was recently changed
1210 ceph_encode_32(&p
, READ_ONCE(osdc
->epoch_barrier
));
1211 /* oldest_flush_tid (version 6) */
1212 ceph_encode_64(&p
, arg
->oldest_flush_tid
);
1215 * caller_uid/caller_gid (version 7)
1217 * Currently, we don't properly track which caller dirtied the caps
1218 * last, and force a flush of them when there is a conflict. For now,
1219 * just set this to 0:0, to emulate how the MDS has worked up to now.
1221 ceph_encode_32(&p
, 0);
1222 ceph_encode_32(&p
, 0);
1224 /* pool namespace (version 8) (mds always ignores this) */
1225 ceph_encode_32(&p
, 0);
1228 * btime and change_attr (version 9)
1230 * We just zero these out for now, as the MDS ignores them unless
1231 * the requisite feature flags are set (which we don't do yet).
1233 ceph_encode_timespec64(p
, &zerotime
);
1234 p
+= sizeof(struct ceph_timespec
);
1235 ceph_encode_64(&p
, 0);
1237 /* Advisory flags (version 10) */
1238 ceph_encode_32(&p
, arg
->flags
);
1240 ceph_con_send(&arg
->session
->s_con
, msg
);
1245 * Queue cap releases when an inode is dropped from our cache. Since
1246 * inode is about to be destroyed, there is no need for i_ceph_lock.
1248 void ceph_queue_caps_release(struct inode
*inode
)
1250 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1253 p
= rb_first(&ci
->i_caps
);
1255 struct ceph_cap
*cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1257 __ceph_remove_cap(cap
, true);
1262 * Send a cap msg on the given inode. Update our caps state, then
1263 * drop i_ceph_lock and send the message.
1265 * Make note of max_size reported/requested from mds, revoked caps
1266 * that have now been implemented.
1268 * Make half-hearted attempt ot to invalidate page cache if we are
1269 * dropping RDCACHE. Note that this will leave behind locked pages
1270 * that we'll then need to deal with elsewhere.
1272 * Return non-zero if delayed release, or we experienced an error
1273 * such that the caller should requeue + retry later.
1275 * called with i_ceph_lock, then drops it.
1276 * caller should hold snap_rwsem (read), s_mutex.
1278 static int __send_cap(struct ceph_mds_client
*mdsc
, struct ceph_cap
*cap
,
1279 int op
, bool sync
, int used
, int want
, int retain
,
1280 int flushing
, u64 flush_tid
, u64 oldest_flush_tid
)
1281 __releases(cap
->ci
->i_ceph_lock
)
1283 struct ceph_inode_info
*ci
= cap
->ci
;
1284 struct inode
*inode
= &ci
->vfs_inode
;
1285 struct cap_msg_args arg
;
1291 held
= cap
->issued
| cap
->implemented
;
1292 revoking
= cap
->implemented
& ~cap
->issued
;
1293 retain
&= ~revoking
;
1295 dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n",
1296 inode
, cap
, cap
->session
,
1297 ceph_cap_string(held
), ceph_cap_string(held
& retain
),
1298 ceph_cap_string(revoking
));
1299 BUG_ON((retain
& CEPH_CAP_PIN
) == 0);
1301 arg
.session
= cap
->session
;
1303 /* don't release wanted unless we've waited a bit. */
1304 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0 &&
1305 time_before(jiffies
, ci
->i_hold_caps_min
)) {
1306 dout(" delaying issued %s -> %s, wanted %s -> %s on send\n",
1307 ceph_cap_string(cap
->issued
),
1308 ceph_cap_string(cap
->issued
& retain
),
1309 ceph_cap_string(cap
->mds_wanted
),
1310 ceph_cap_string(want
));
1311 want
|= cap
->mds_wanted
;
1312 retain
|= cap
->issued
;
1315 ci
->i_ceph_flags
&= ~(CEPH_I_NODELAY
| CEPH_I_FLUSH
);
1316 if (want
& ~cap
->mds_wanted
) {
1317 /* user space may open/close single file frequently.
1318 * This avoids droping mds_wanted immediately after
1319 * requesting new mds_wanted.
1321 __cap_set_timeouts(mdsc
, ci
);
1324 cap
->issued
&= retain
; /* drop bits we don't want */
1325 if (cap
->implemented
& ~cap
->issued
) {
1327 * Wake up any waiters on wanted -> needed transition.
1328 * This is due to the weird transition from buffered
1329 * to sync IO... we need to flush dirty pages _before_
1330 * allowing sync writes to avoid reordering.
1334 cap
->implemented
&= cap
->issued
| used
;
1335 cap
->mds_wanted
= want
;
1337 arg
.ino
= ceph_vino(inode
).ino
;
1338 arg
.cid
= cap
->cap_id
;
1339 arg
.follows
= flushing
? ci
->i_head_snapc
->seq
: 0;
1340 arg
.flush_tid
= flush_tid
;
1341 arg
.oldest_flush_tid
= oldest_flush_tid
;
1343 arg
.size
= inode
->i_size
;
1344 ci
->i_reported_size
= arg
.size
;
1345 arg
.max_size
= ci
->i_wanted_max_size
;
1346 ci
->i_requested_max_size
= arg
.max_size
;
1348 if (flushing
& CEPH_CAP_XATTR_EXCL
) {
1349 __ceph_build_xattrs_blob(ci
);
1350 arg
.xattr_version
= ci
->i_xattrs
.version
;
1351 arg
.xattr_buf
= ci
->i_xattrs
.blob
;
1353 arg
.xattr_buf
= NULL
;
1356 arg
.mtime
= inode
->i_mtime
;
1357 arg
.atime
= inode
->i_atime
;
1358 arg
.ctime
= inode
->i_ctime
;
1361 arg
.caps
= cap
->implemented
;
1363 arg
.dirty
= flushing
;
1366 arg
.issue_seq
= cap
->issue_seq
;
1367 arg
.mseq
= cap
->mseq
;
1368 arg
.time_warp_seq
= ci
->i_time_warp_seq
;
1370 arg
.uid
= inode
->i_uid
;
1371 arg
.gid
= inode
->i_gid
;
1372 arg
.mode
= inode
->i_mode
;
1374 arg
.inline_data
= ci
->i_inline_version
!= CEPH_INLINE_NONE
;
1375 if (list_empty(&ci
->i_cap_snaps
))
1376 arg
.flags
= CEPH_CLIENT_CAPS_NO_CAPSNAP
;
1378 arg
.flags
= CEPH_CLIENT_CAPS_PENDING_CAPSNAP
;
1380 arg
.flags
|= CEPH_CLIENT_CAPS_SYNC
;
1382 spin_unlock(&ci
->i_ceph_lock
);
1384 ret
= send_cap_msg(&arg
);
1386 dout("error sending cap msg, must requeue %p\n", inode
);
1391 wake_up_all(&ci
->i_cap_wq
);
1396 static inline int __send_flush_snap(struct inode
*inode
,
1397 struct ceph_mds_session
*session
,
1398 struct ceph_cap_snap
*capsnap
,
1399 u32 mseq
, u64 oldest_flush_tid
)
1401 struct cap_msg_args arg
;
1403 arg
.session
= session
;
1404 arg
.ino
= ceph_vino(inode
).ino
;
1406 arg
.follows
= capsnap
->follows
;
1407 arg
.flush_tid
= capsnap
->cap_flush
.tid
;
1408 arg
.oldest_flush_tid
= oldest_flush_tid
;
1410 arg
.size
= capsnap
->size
;
1412 arg
.xattr_version
= capsnap
->xattr_version
;
1413 arg
.xattr_buf
= capsnap
->xattr_blob
;
1415 arg
.atime
= capsnap
->atime
;
1416 arg
.mtime
= capsnap
->mtime
;
1417 arg
.ctime
= capsnap
->ctime
;
1419 arg
.op
= CEPH_CAP_OP_FLUSHSNAP
;
1420 arg
.caps
= capsnap
->issued
;
1422 arg
.dirty
= capsnap
->dirty
;
1427 arg
.time_warp_seq
= capsnap
->time_warp_seq
;
1429 arg
.uid
= capsnap
->uid
;
1430 arg
.gid
= capsnap
->gid
;
1431 arg
.mode
= capsnap
->mode
;
1433 arg
.inline_data
= capsnap
->inline_data
;
1436 return send_cap_msg(&arg
);
1440 * When a snapshot is taken, clients accumulate dirty metadata on
1441 * inodes with capabilities in ceph_cap_snaps to describe the file
1442 * state at the time the snapshot was taken. This must be flushed
1443 * asynchronously back to the MDS once sync writes complete and dirty
1444 * data is written out.
1446 * Called under i_ceph_lock. Takes s_mutex as needed.
1448 static void __ceph_flush_snaps(struct ceph_inode_info
*ci
,
1449 struct ceph_mds_session
*session
)
1450 __releases(ci
->i_ceph_lock
)
1451 __acquires(ci
->i_ceph_lock
)
1453 struct inode
*inode
= &ci
->vfs_inode
;
1454 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
1455 struct ceph_cap_snap
*capsnap
;
1456 u64 oldest_flush_tid
= 0;
1457 u64 first_tid
= 1, last_tid
= 0;
1459 dout("__flush_snaps %p session %p\n", inode
, session
);
1461 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
1463 * we need to wait for sync writes to complete and for dirty
1464 * pages to be written out.
1466 if (capsnap
->dirty_pages
|| capsnap
->writing
)
1469 /* should be removed by ceph_try_drop_cap_snap() */
1470 BUG_ON(!capsnap
->need_flush
);
1472 /* only flush each capsnap once */
1473 if (capsnap
->cap_flush
.tid
> 0) {
1474 dout(" already flushed %p, skipping\n", capsnap
);
1478 spin_lock(&mdsc
->cap_dirty_lock
);
1479 capsnap
->cap_flush
.tid
= ++mdsc
->last_cap_flush_tid
;
1480 list_add_tail(&capsnap
->cap_flush
.g_list
,
1481 &mdsc
->cap_flush_list
);
1482 if (oldest_flush_tid
== 0)
1483 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
1484 if (list_empty(&ci
->i_flushing_item
)) {
1485 list_add_tail(&ci
->i_flushing_item
,
1486 &session
->s_cap_flushing
);
1488 spin_unlock(&mdsc
->cap_dirty_lock
);
1490 list_add_tail(&capsnap
->cap_flush
.i_list
,
1491 &ci
->i_cap_flush_list
);
1494 first_tid
= capsnap
->cap_flush
.tid
;
1495 last_tid
= capsnap
->cap_flush
.tid
;
1498 ci
->i_ceph_flags
&= ~CEPH_I_FLUSH_SNAPS
;
1500 while (first_tid
<= last_tid
) {
1501 struct ceph_cap
*cap
= ci
->i_auth_cap
;
1502 struct ceph_cap_flush
*cf
;
1505 if (!(cap
&& cap
->session
== session
)) {
1506 dout("__flush_snaps %p auth cap %p not mds%d, "
1507 "stop\n", inode
, cap
, session
->s_mds
);
1512 list_for_each_entry(cf
, &ci
->i_cap_flush_list
, i_list
) {
1513 if (cf
->tid
>= first_tid
) {
1521 first_tid
= cf
->tid
+ 1;
1523 capsnap
= container_of(cf
, struct ceph_cap_snap
, cap_flush
);
1524 refcount_inc(&capsnap
->nref
);
1525 spin_unlock(&ci
->i_ceph_lock
);
1527 dout("__flush_snaps %p capsnap %p tid %llu %s\n",
1528 inode
, capsnap
, cf
->tid
, ceph_cap_string(capsnap
->dirty
));
1530 ret
= __send_flush_snap(inode
, session
, capsnap
, cap
->mseq
,
1533 pr_err("__flush_snaps: error sending cap flushsnap, "
1534 "ino (%llx.%llx) tid %llu follows %llu\n",
1535 ceph_vinop(inode
), cf
->tid
, capsnap
->follows
);
1538 ceph_put_cap_snap(capsnap
);
1539 spin_lock(&ci
->i_ceph_lock
);
1543 void ceph_flush_snaps(struct ceph_inode_info
*ci
,
1544 struct ceph_mds_session
**psession
)
1546 struct inode
*inode
= &ci
->vfs_inode
;
1547 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
1548 struct ceph_mds_session
*session
= NULL
;
1551 dout("ceph_flush_snaps %p\n", inode
);
1553 session
= *psession
;
1555 spin_lock(&ci
->i_ceph_lock
);
1556 if (!(ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
)) {
1557 dout(" no capsnap needs flush, doing nothing\n");
1560 if (!ci
->i_auth_cap
) {
1561 dout(" no auth cap (migrating?), doing nothing\n");
1565 mds
= ci
->i_auth_cap
->session
->s_mds
;
1566 if (session
&& session
->s_mds
!= mds
) {
1567 dout(" oops, wrong session %p mutex\n", session
);
1568 mutex_unlock(&session
->s_mutex
);
1569 ceph_put_mds_session(session
);
1573 spin_unlock(&ci
->i_ceph_lock
);
1574 mutex_lock(&mdsc
->mutex
);
1575 session
= __ceph_lookup_mds_session(mdsc
, mds
);
1576 mutex_unlock(&mdsc
->mutex
);
1578 dout(" inverting session/ino locks on %p\n", session
);
1579 mutex_lock(&session
->s_mutex
);
1584 // make sure flushsnap messages are sent in proper order.
1585 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
) {
1586 __kick_flushing_caps(mdsc
, session
, ci
, 0);
1587 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
1590 __ceph_flush_snaps(ci
, session
);
1592 spin_unlock(&ci
->i_ceph_lock
);
1595 *psession
= session
;
1596 } else if (session
) {
1597 mutex_unlock(&session
->s_mutex
);
1598 ceph_put_mds_session(session
);
1600 /* we flushed them all; remove this inode from the queue */
1601 spin_lock(&mdsc
->snap_flush_lock
);
1602 list_del_init(&ci
->i_snap_flush_item
);
1603 spin_unlock(&mdsc
->snap_flush_lock
);
1607 * Mark caps dirty. If inode is newly dirty, return the dirty flags.
1608 * Caller is then responsible for calling __mark_inode_dirty with the
1609 * returned flags value.
1611 int __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
,
1612 struct ceph_cap_flush
**pcf
)
1614 struct ceph_mds_client
*mdsc
=
1615 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
1616 struct inode
*inode
= &ci
->vfs_inode
;
1617 int was
= ci
->i_dirty_caps
;
1620 if (!ci
->i_auth_cap
) {
1621 pr_warn("__mark_dirty_caps %p %llx mask %s, "
1622 "but no auth cap (session was closed?)\n",
1623 inode
, ceph_ino(inode
), ceph_cap_string(mask
));
1627 dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci
->vfs_inode
,
1628 ceph_cap_string(mask
), ceph_cap_string(was
),
1629 ceph_cap_string(was
| mask
));
1630 ci
->i_dirty_caps
|= mask
;
1632 WARN_ON_ONCE(ci
->i_prealloc_cap_flush
);
1633 swap(ci
->i_prealloc_cap_flush
, *pcf
);
1635 if (!ci
->i_head_snapc
) {
1636 WARN_ON_ONCE(!rwsem_is_locked(&mdsc
->snap_rwsem
));
1637 ci
->i_head_snapc
= ceph_get_snap_context(
1638 ci
->i_snap_realm
->cached_context
);
1640 dout(" inode %p now dirty snapc %p auth cap %p\n",
1641 &ci
->vfs_inode
, ci
->i_head_snapc
, ci
->i_auth_cap
);
1642 BUG_ON(!list_empty(&ci
->i_dirty_item
));
1643 spin_lock(&mdsc
->cap_dirty_lock
);
1644 list_add(&ci
->i_dirty_item
, &mdsc
->cap_dirty
);
1645 spin_unlock(&mdsc
->cap_dirty_lock
);
1646 if (ci
->i_flushing_caps
== 0) {
1648 dirty
|= I_DIRTY_SYNC
;
1651 WARN_ON_ONCE(!ci
->i_prealloc_cap_flush
);
1653 BUG_ON(list_empty(&ci
->i_dirty_item
));
1654 if (((was
| ci
->i_flushing_caps
) & CEPH_CAP_FILE_BUFFER
) &&
1655 (mask
& CEPH_CAP_FILE_BUFFER
))
1656 dirty
|= I_DIRTY_DATASYNC
;
1657 __cap_delay_requeue(mdsc
, ci
, true);
1661 struct ceph_cap_flush
*ceph_alloc_cap_flush(void)
1663 return kmem_cache_alloc(ceph_cap_flush_cachep
, GFP_KERNEL
);
1666 void ceph_free_cap_flush(struct ceph_cap_flush
*cf
)
1669 kmem_cache_free(ceph_cap_flush_cachep
, cf
);
1672 static u64
__get_oldest_flush_tid(struct ceph_mds_client
*mdsc
)
1674 if (!list_empty(&mdsc
->cap_flush_list
)) {
1675 struct ceph_cap_flush
*cf
=
1676 list_first_entry(&mdsc
->cap_flush_list
,
1677 struct ceph_cap_flush
, g_list
);
1684 * Remove cap_flush from the mdsc's or inode's flushing cap list.
1685 * Return true if caller needs to wake up flush waiters.
1687 static bool __finish_cap_flush(struct ceph_mds_client
*mdsc
,
1688 struct ceph_inode_info
*ci
,
1689 struct ceph_cap_flush
*cf
)
1691 struct ceph_cap_flush
*prev
;
1692 bool wake
= cf
->wake
;
1694 /* are there older pending cap flushes? */
1695 if (wake
&& cf
->g_list
.prev
!= &mdsc
->cap_flush_list
) {
1696 prev
= list_prev_entry(cf
, g_list
);
1700 list_del(&cf
->g_list
);
1702 if (wake
&& cf
->i_list
.prev
!= &ci
->i_cap_flush_list
) {
1703 prev
= list_prev_entry(cf
, i_list
);
1707 list_del(&cf
->i_list
);
1715 * Add dirty inode to the flushing list. Assigned a seq number so we
1716 * can wait for caps to flush without starving.
1718 * Called under i_ceph_lock.
1720 static int __mark_caps_flushing(struct inode
*inode
,
1721 struct ceph_mds_session
*session
, bool wake
,
1722 u64
*flush_tid
, u64
*oldest_flush_tid
)
1724 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
1725 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1726 struct ceph_cap_flush
*cf
= NULL
;
1729 BUG_ON(ci
->i_dirty_caps
== 0);
1730 BUG_ON(list_empty(&ci
->i_dirty_item
));
1731 BUG_ON(!ci
->i_prealloc_cap_flush
);
1733 flushing
= ci
->i_dirty_caps
;
1734 dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n",
1735 ceph_cap_string(flushing
),
1736 ceph_cap_string(ci
->i_flushing_caps
),
1737 ceph_cap_string(ci
->i_flushing_caps
| flushing
));
1738 ci
->i_flushing_caps
|= flushing
;
1739 ci
->i_dirty_caps
= 0;
1740 dout(" inode %p now !dirty\n", inode
);
1742 swap(cf
, ci
->i_prealloc_cap_flush
);
1743 cf
->caps
= flushing
;
1746 spin_lock(&mdsc
->cap_dirty_lock
);
1747 list_del_init(&ci
->i_dirty_item
);
1749 cf
->tid
= ++mdsc
->last_cap_flush_tid
;
1750 list_add_tail(&cf
->g_list
, &mdsc
->cap_flush_list
);
1751 *oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
1753 if (list_empty(&ci
->i_flushing_item
)) {
1754 list_add_tail(&ci
->i_flushing_item
, &session
->s_cap_flushing
);
1755 mdsc
->num_cap_flushing
++;
1757 spin_unlock(&mdsc
->cap_dirty_lock
);
1759 list_add_tail(&cf
->i_list
, &ci
->i_cap_flush_list
);
1761 *flush_tid
= cf
->tid
;
1766 * try to invalidate mapping pages without blocking.
1768 static int try_nonblocking_invalidate(struct inode
*inode
)
1770 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1771 u32 invalidating_gen
= ci
->i_rdcache_gen
;
1773 spin_unlock(&ci
->i_ceph_lock
);
1774 invalidate_mapping_pages(&inode
->i_data
, 0, -1);
1775 spin_lock(&ci
->i_ceph_lock
);
1777 if (inode
->i_data
.nrpages
== 0 &&
1778 invalidating_gen
== ci
->i_rdcache_gen
) {
1780 dout("try_nonblocking_invalidate %p success\n", inode
);
1781 /* save any racing async invalidate some trouble */
1782 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
- 1;
1785 dout("try_nonblocking_invalidate %p failed\n", inode
);
1789 bool __ceph_should_report_size(struct ceph_inode_info
*ci
)
1791 loff_t size
= ci
->vfs_inode
.i_size
;
1792 /* mds will adjust max size according to the reported size */
1793 if (ci
->i_flushing_caps
& CEPH_CAP_FILE_WR
)
1795 if (size
>= ci
->i_max_size
)
1797 /* half of previous max_size increment has been used */
1798 if (ci
->i_max_size
> ci
->i_reported_size
&&
1799 (size
<< 1) >= ci
->i_max_size
+ ci
->i_reported_size
)
1805 * Swiss army knife function to examine currently used and wanted
1806 * versus held caps. Release, flush, ack revoked caps to mds as
1809 * CHECK_CAPS_NODELAY - caller is delayed work and we should not delay
1810 * cap release further.
1811 * CHECK_CAPS_AUTHONLY - we should only check the auth cap
1812 * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without
1815 void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
1816 struct ceph_mds_session
*session
)
1818 struct ceph_fs_client
*fsc
= ceph_inode_to_client(&ci
->vfs_inode
);
1819 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
1820 struct inode
*inode
= &ci
->vfs_inode
;
1821 struct ceph_cap
*cap
;
1822 u64 flush_tid
, oldest_flush_tid
;
1823 int file_wanted
, used
, cap_used
;
1824 int took_snap_rwsem
= 0; /* true if mdsc->snap_rwsem held */
1825 int issued
, implemented
, want
, retain
, revoking
, flushing
= 0;
1826 int mds
= -1; /* keep track of how far we've gone through i_caps list
1827 to avoid an infinite loop on retry */
1829 int delayed
= 0, sent
= 0;
1830 bool no_delay
= flags
& CHECK_CAPS_NODELAY
;
1831 bool queue_invalidate
= false;
1832 bool tried_invalidate
= false;
1834 /* if we are unmounting, flush any unused caps immediately. */
1838 spin_lock(&ci
->i_ceph_lock
);
1840 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
1841 flags
|= CHECK_CAPS_FLUSH
;
1843 if (!(flags
& CHECK_CAPS_AUTHONLY
) ||
1844 (ci
->i_auth_cap
&& __ceph_is_single_caps(ci
)))
1845 __cap_delay_cancel(mdsc
, ci
);
1849 spin_lock(&ci
->i_ceph_lock
);
1851 file_wanted
= __ceph_caps_file_wanted(ci
);
1852 used
= __ceph_caps_used(ci
);
1853 issued
= __ceph_caps_issued(ci
, &implemented
);
1854 revoking
= implemented
& ~issued
;
1857 retain
= file_wanted
| used
| CEPH_CAP_PIN
;
1858 if (!mdsc
->stopping
&& inode
->i_nlink
> 0) {
1860 retain
|= CEPH_CAP_ANY
; /* be greedy */
1861 } else if (S_ISDIR(inode
->i_mode
) &&
1862 (issued
& CEPH_CAP_FILE_SHARED
) &&
1863 __ceph_dir_is_complete(ci
)) {
1865 * If a directory is complete, we want to keep
1866 * the exclusive cap. So that MDS does not end up
1867 * revoking the shared cap on every create/unlink
1870 if (IS_RDONLY(inode
))
1871 want
= CEPH_CAP_ANY_SHARED
;
1873 want
= CEPH_CAP_ANY_SHARED
| CEPH_CAP_FILE_EXCL
;
1877 retain
|= CEPH_CAP_ANY_SHARED
;
1879 * keep RD only if we didn't have the file open RW,
1880 * because then the mds would revoke it anyway to
1881 * journal max_size=0.
1883 if (ci
->i_max_size
== 0)
1884 retain
|= CEPH_CAP_ANY_RD
;
1888 dout("check_caps %p file_want %s used %s dirty %s flushing %s"
1889 " issued %s revoking %s retain %s %s%s%s\n", inode
,
1890 ceph_cap_string(file_wanted
),
1891 ceph_cap_string(used
), ceph_cap_string(ci
->i_dirty_caps
),
1892 ceph_cap_string(ci
->i_flushing_caps
),
1893 ceph_cap_string(issued
), ceph_cap_string(revoking
),
1894 ceph_cap_string(retain
),
1895 (flags
& CHECK_CAPS_AUTHONLY
) ? " AUTHONLY" : "",
1896 (flags
& CHECK_CAPS_NODELAY
) ? " NODELAY" : "",
1897 (flags
& CHECK_CAPS_FLUSH
) ? " FLUSH" : "");
1900 * If we no longer need to hold onto old our caps, and we may
1901 * have cached pages, but don't want them, then try to invalidate.
1902 * If we fail, it's because pages are locked.... try again later.
1904 if ((!no_delay
|| mdsc
->stopping
) &&
1905 !S_ISDIR(inode
->i_mode
) && /* ignore readdir cache */
1906 !(ci
->i_wb_ref
|| ci
->i_wrbuffer_ref
) && /* no dirty pages... */
1907 inode
->i_data
.nrpages
&& /* have cached pages */
1908 (revoking
& (CEPH_CAP_FILE_CACHE
|
1909 CEPH_CAP_FILE_LAZYIO
)) && /* or revoking cache */
1910 !tried_invalidate
) {
1911 dout("check_caps trying to invalidate on %p\n", inode
);
1912 if (try_nonblocking_invalidate(inode
) < 0) {
1913 dout("check_caps queuing invalidate\n");
1914 queue_invalidate
= true;
1915 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
1917 tried_invalidate
= true;
1921 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
1922 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1924 /* avoid looping forever */
1925 if (mds
>= cap
->mds
||
1926 ((flags
& CHECK_CAPS_AUTHONLY
) && cap
!= ci
->i_auth_cap
))
1929 /* NOTE: no side-effects allowed, until we take s_mutex */
1932 if (ci
->i_auth_cap
&& cap
!= ci
->i_auth_cap
)
1933 cap_used
&= ~ci
->i_auth_cap
->issued
;
1935 revoking
= cap
->implemented
& ~cap
->issued
;
1936 dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n",
1937 cap
->mds
, cap
, ceph_cap_string(cap_used
),
1938 ceph_cap_string(cap
->issued
),
1939 ceph_cap_string(cap
->implemented
),
1940 ceph_cap_string(revoking
));
1942 if (cap
== ci
->i_auth_cap
&&
1943 (cap
->issued
& CEPH_CAP_FILE_WR
)) {
1944 /* request larger max_size from MDS? */
1945 if (ci
->i_wanted_max_size
> ci
->i_max_size
&&
1946 ci
->i_wanted_max_size
> ci
->i_requested_max_size
) {
1947 dout("requesting new max_size\n");
1951 /* approaching file_max? */
1952 if (__ceph_should_report_size(ci
)) {
1953 dout("i_size approaching max_size\n");
1957 /* flush anything dirty? */
1958 if (cap
== ci
->i_auth_cap
) {
1959 if ((flags
& CHECK_CAPS_FLUSH
) && ci
->i_dirty_caps
) {
1960 dout("flushing dirty caps\n");
1963 if (ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
) {
1964 dout("flushing snap caps\n");
1969 /* completed revocation? going down and there are no caps? */
1970 if (revoking
&& (revoking
& cap_used
) == 0) {
1971 dout("completed revocation of %s\n",
1972 ceph_cap_string(cap
->implemented
& ~cap
->issued
));
1976 /* want more caps from mds? */
1977 if (want
& ~(cap
->mds_wanted
| cap
->issued
))
1980 /* things we might delay */
1981 if ((cap
->issued
& ~retain
) == 0)
1982 continue; /* nope, all good */
1988 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0 &&
1989 time_before(jiffies
, ci
->i_hold_caps_max
)) {
1990 dout(" delaying issued %s -> %s, wanted %s -> %s\n",
1991 ceph_cap_string(cap
->issued
),
1992 ceph_cap_string(cap
->issued
& retain
),
1993 ceph_cap_string(cap
->mds_wanted
),
1994 ceph_cap_string(want
));
2000 if (ci
->i_ceph_flags
& CEPH_I_NOFLUSH
) {
2001 dout(" skipping %p I_NOFLUSH set\n", inode
);
2005 if (session
&& session
!= cap
->session
) {
2006 dout("oops, wrong session %p mutex\n", session
);
2007 mutex_unlock(&session
->s_mutex
);
2011 session
= cap
->session
;
2012 if (mutex_trylock(&session
->s_mutex
) == 0) {
2013 dout("inverting session/ino locks on %p\n",
2015 spin_unlock(&ci
->i_ceph_lock
);
2016 if (took_snap_rwsem
) {
2017 up_read(&mdsc
->snap_rwsem
);
2018 took_snap_rwsem
= 0;
2020 mutex_lock(&session
->s_mutex
);
2025 /* kick flushing and flush snaps before sending normal
2027 if (cap
== ci
->i_auth_cap
&&
2029 (CEPH_I_KICK_FLUSH
| CEPH_I_FLUSH_SNAPS
))) {
2030 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
) {
2031 __kick_flushing_caps(mdsc
, session
, ci
, 0);
2032 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2034 if (ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
)
2035 __ceph_flush_snaps(ci
, session
);
2040 /* take snap_rwsem after session mutex */
2041 if (!took_snap_rwsem
) {
2042 if (down_read_trylock(&mdsc
->snap_rwsem
) == 0) {
2043 dout("inverting snap/in locks on %p\n",
2045 spin_unlock(&ci
->i_ceph_lock
);
2046 down_read(&mdsc
->snap_rwsem
);
2047 took_snap_rwsem
= 1;
2050 took_snap_rwsem
= 1;
2053 if (cap
== ci
->i_auth_cap
&& ci
->i_dirty_caps
) {
2054 flushing
= __mark_caps_flushing(inode
, session
, false,
2060 spin_lock(&mdsc
->cap_dirty_lock
);
2061 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2062 spin_unlock(&mdsc
->cap_dirty_lock
);
2065 mds
= cap
->mds
; /* remember mds, so we don't repeat */
2068 /* __send_cap drops i_ceph_lock */
2069 delayed
+= __send_cap(mdsc
, cap
, CEPH_CAP_OP_UPDATE
, false,
2070 cap_used
, want
, retain
, flushing
,
2071 flush_tid
, oldest_flush_tid
);
2072 goto retry
; /* retake i_ceph_lock and restart our cap scan. */
2075 /* Reschedule delayed caps release if we delayed anything */
2077 __cap_delay_requeue(mdsc
, ci
, false);
2079 spin_unlock(&ci
->i_ceph_lock
);
2081 if (queue_invalidate
)
2082 ceph_queue_invalidate(inode
);
2085 mutex_unlock(&session
->s_mutex
);
2086 if (took_snap_rwsem
)
2087 up_read(&mdsc
->snap_rwsem
);
2091 * Try to flush dirty caps back to the auth mds.
2093 static int try_flush_caps(struct inode
*inode
, u64
*ptid
)
2095 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2096 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2097 struct ceph_mds_session
*session
= NULL
;
2099 u64 flush_tid
= 0, oldest_flush_tid
= 0;
2102 spin_lock(&ci
->i_ceph_lock
);
2103 if (ci
->i_ceph_flags
& CEPH_I_NOFLUSH
) {
2104 spin_unlock(&ci
->i_ceph_lock
);
2105 dout("try_flush_caps skipping %p I_NOFLUSH set\n", inode
);
2108 if (ci
->i_dirty_caps
&& ci
->i_auth_cap
) {
2109 struct ceph_cap
*cap
= ci
->i_auth_cap
;
2110 int used
= __ceph_caps_used(ci
);
2111 int want
= __ceph_caps_wanted(ci
);
2114 if (!session
|| session
!= cap
->session
) {
2115 spin_unlock(&ci
->i_ceph_lock
);
2117 mutex_unlock(&session
->s_mutex
);
2118 session
= cap
->session
;
2119 mutex_lock(&session
->s_mutex
);
2122 if (cap
->session
->s_state
< CEPH_MDS_SESSION_OPEN
) {
2123 spin_unlock(&ci
->i_ceph_lock
);
2127 flushing
= __mark_caps_flushing(inode
, session
, true,
2128 &flush_tid
, &oldest_flush_tid
);
2130 /* __send_cap drops i_ceph_lock */
2131 delayed
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
, true,
2132 used
, want
, (cap
->issued
| cap
->implemented
),
2133 flushing
, flush_tid
, oldest_flush_tid
);
2136 spin_lock(&ci
->i_ceph_lock
);
2137 __cap_delay_requeue(mdsc
, ci
, true);
2138 spin_unlock(&ci
->i_ceph_lock
);
2141 if (!list_empty(&ci
->i_cap_flush_list
)) {
2142 struct ceph_cap_flush
*cf
=
2143 list_last_entry(&ci
->i_cap_flush_list
,
2144 struct ceph_cap_flush
, i_list
);
2146 flush_tid
= cf
->tid
;
2148 flushing
= ci
->i_flushing_caps
;
2149 spin_unlock(&ci
->i_ceph_lock
);
2153 mutex_unlock(&session
->s_mutex
);
2160 * Return true if we've flushed caps through the given flush_tid.
2162 static int caps_are_flushed(struct inode
*inode
, u64 flush_tid
)
2164 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2167 spin_lock(&ci
->i_ceph_lock
);
2168 if (!list_empty(&ci
->i_cap_flush_list
)) {
2169 struct ceph_cap_flush
* cf
=
2170 list_first_entry(&ci
->i_cap_flush_list
,
2171 struct ceph_cap_flush
, i_list
);
2172 if (cf
->tid
<= flush_tid
)
2175 spin_unlock(&ci
->i_ceph_lock
);
2180 * wait for any unsafe requests to complete.
2182 static int unsafe_request_wait(struct inode
*inode
)
2184 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2185 struct ceph_mds_request
*req1
= NULL
, *req2
= NULL
;
2188 spin_lock(&ci
->i_unsafe_lock
);
2189 if (S_ISDIR(inode
->i_mode
) && !list_empty(&ci
->i_unsafe_dirops
)) {
2190 req1
= list_last_entry(&ci
->i_unsafe_dirops
,
2191 struct ceph_mds_request
,
2193 ceph_mdsc_get_request(req1
);
2195 if (!list_empty(&ci
->i_unsafe_iops
)) {
2196 req2
= list_last_entry(&ci
->i_unsafe_iops
,
2197 struct ceph_mds_request
,
2198 r_unsafe_target_item
);
2199 ceph_mdsc_get_request(req2
);
2201 spin_unlock(&ci
->i_unsafe_lock
);
2203 dout("unsafe_request_wait %p wait on tid %llu %llu\n",
2204 inode
, req1
? req1
->r_tid
: 0ULL, req2
? req2
->r_tid
: 0ULL);
2206 ret
= !wait_for_completion_timeout(&req1
->r_safe_completion
,
2207 ceph_timeout_jiffies(req1
->r_timeout
));
2210 ceph_mdsc_put_request(req1
);
2213 ret
= !wait_for_completion_timeout(&req2
->r_safe_completion
,
2214 ceph_timeout_jiffies(req2
->r_timeout
));
2217 ceph_mdsc_put_request(req2
);
2222 int ceph_fsync(struct file
*file
, loff_t start
, loff_t end
, int datasync
)
2224 struct inode
*inode
= file
->f_mapping
->host
;
2225 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2230 dout("fsync %p%s\n", inode
, datasync
? " datasync" : "");
2232 ret
= file_write_and_wait_range(file
, start
, end
);
2241 dirty
= try_flush_caps(inode
, &flush_tid
);
2242 dout("fsync dirty caps are %s\n", ceph_cap_string(dirty
));
2244 ret
= unsafe_request_wait(inode
);
2247 * only wait on non-file metadata writeback (the mds
2248 * can recover size and mtime, so we don't need to
2251 if (!ret
&& (dirty
& ~CEPH_CAP_ANY_FILE_WR
)) {
2252 ret
= wait_event_interruptible(ci
->i_cap_wq
,
2253 caps_are_flushed(inode
, flush_tid
));
2255 inode_unlock(inode
);
2257 dout("fsync %p%s result=%d\n", inode
, datasync
? " datasync" : "", ret
);
2262 * Flush any dirty caps back to the mds. If we aren't asked to wait,
2263 * queue inode for flush but don't do so immediately, because we can
2264 * get by with fewer MDS messages if we wait for data writeback to
2267 int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
)
2269 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2273 int wait
= (wbc
->sync_mode
== WB_SYNC_ALL
&& !wbc
->for_sync
);
2275 dout("write_inode %p wait=%d\n", inode
, wait
);
2277 dirty
= try_flush_caps(inode
, &flush_tid
);
2279 err
= wait_event_interruptible(ci
->i_cap_wq
,
2280 caps_are_flushed(inode
, flush_tid
));
2282 struct ceph_mds_client
*mdsc
=
2283 ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2285 spin_lock(&ci
->i_ceph_lock
);
2286 if (__ceph_caps_dirty(ci
))
2287 __cap_delay_requeue_front(mdsc
, ci
);
2288 spin_unlock(&ci
->i_ceph_lock
);
2293 static void __kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2294 struct ceph_mds_session
*session
,
2295 struct ceph_inode_info
*ci
,
2296 u64 oldest_flush_tid
)
2297 __releases(ci
->i_ceph_lock
)
2298 __acquires(ci
->i_ceph_lock
)
2300 struct inode
*inode
= &ci
->vfs_inode
;
2301 struct ceph_cap
*cap
;
2302 struct ceph_cap_flush
*cf
;
2306 list_for_each_entry(cf
, &ci
->i_cap_flush_list
, i_list
) {
2307 if (cf
->tid
< first_tid
)
2310 cap
= ci
->i_auth_cap
;
2311 if (!(cap
&& cap
->session
== session
)) {
2312 pr_err("%p auth cap %p not mds%d ???\n",
2313 inode
, cap
, session
->s_mds
);
2317 first_tid
= cf
->tid
+ 1;
2320 dout("kick_flushing_caps %p cap %p tid %llu %s\n",
2321 inode
, cap
, cf
->tid
, ceph_cap_string(cf
->caps
));
2322 ci
->i_ceph_flags
|= CEPH_I_NODELAY
;
2323 ret
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
,
2324 false, __ceph_caps_used(ci
),
2325 __ceph_caps_wanted(ci
),
2326 cap
->issued
| cap
->implemented
,
2327 cf
->caps
, cf
->tid
, oldest_flush_tid
);
2329 pr_err("kick_flushing_caps: error sending "
2330 "cap flush, ino (%llx.%llx) "
2331 "tid %llu flushing %s\n",
2332 ceph_vinop(inode
), cf
->tid
,
2333 ceph_cap_string(cf
->caps
));
2336 struct ceph_cap_snap
*capsnap
=
2337 container_of(cf
, struct ceph_cap_snap
,
2339 dout("kick_flushing_caps %p capsnap %p tid %llu %s\n",
2340 inode
, capsnap
, cf
->tid
,
2341 ceph_cap_string(capsnap
->dirty
));
2343 refcount_inc(&capsnap
->nref
);
2344 spin_unlock(&ci
->i_ceph_lock
);
2346 ret
= __send_flush_snap(inode
, session
, capsnap
, cap
->mseq
,
2349 pr_err("kick_flushing_caps: error sending "
2350 "cap flushsnap, ino (%llx.%llx) "
2351 "tid %llu follows %llu\n",
2352 ceph_vinop(inode
), cf
->tid
,
2356 ceph_put_cap_snap(capsnap
);
2359 spin_lock(&ci
->i_ceph_lock
);
2363 void ceph_early_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2364 struct ceph_mds_session
*session
)
2366 struct ceph_inode_info
*ci
;
2367 struct ceph_cap
*cap
;
2368 u64 oldest_flush_tid
;
2370 dout("early_kick_flushing_caps mds%d\n", session
->s_mds
);
2372 spin_lock(&mdsc
->cap_dirty_lock
);
2373 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2374 spin_unlock(&mdsc
->cap_dirty_lock
);
2376 list_for_each_entry(ci
, &session
->s_cap_flushing
, i_flushing_item
) {
2377 spin_lock(&ci
->i_ceph_lock
);
2378 cap
= ci
->i_auth_cap
;
2379 if (!(cap
&& cap
->session
== session
)) {
2380 pr_err("%p auth cap %p not mds%d ???\n",
2381 &ci
->vfs_inode
, cap
, session
->s_mds
);
2382 spin_unlock(&ci
->i_ceph_lock
);
2388 * if flushing caps were revoked, we re-send the cap flush
2389 * in client reconnect stage. This guarantees MDS * processes
2390 * the cap flush message before issuing the flushing caps to
2393 if ((cap
->issued
& ci
->i_flushing_caps
) !=
2394 ci
->i_flushing_caps
) {
2395 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2396 __kick_flushing_caps(mdsc
, session
, ci
,
2399 ci
->i_ceph_flags
|= CEPH_I_KICK_FLUSH
;
2402 spin_unlock(&ci
->i_ceph_lock
);
2406 void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2407 struct ceph_mds_session
*session
)
2409 struct ceph_inode_info
*ci
;
2410 struct ceph_cap
*cap
;
2411 u64 oldest_flush_tid
;
2413 dout("kick_flushing_caps mds%d\n", session
->s_mds
);
2415 spin_lock(&mdsc
->cap_dirty_lock
);
2416 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2417 spin_unlock(&mdsc
->cap_dirty_lock
);
2419 list_for_each_entry(ci
, &session
->s_cap_flushing
, i_flushing_item
) {
2420 spin_lock(&ci
->i_ceph_lock
);
2421 cap
= ci
->i_auth_cap
;
2422 if (!(cap
&& cap
->session
== session
)) {
2423 pr_err("%p auth cap %p not mds%d ???\n",
2424 &ci
->vfs_inode
, cap
, session
->s_mds
);
2425 spin_unlock(&ci
->i_ceph_lock
);
2428 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
) {
2429 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2430 __kick_flushing_caps(mdsc
, session
, ci
,
2433 spin_unlock(&ci
->i_ceph_lock
);
2437 static void kick_flushing_inode_caps(struct ceph_mds_client
*mdsc
,
2438 struct ceph_mds_session
*session
,
2439 struct inode
*inode
)
2440 __releases(ci
->i_ceph_lock
)
2442 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2443 struct ceph_cap
*cap
;
2445 cap
= ci
->i_auth_cap
;
2446 dout("kick_flushing_inode_caps %p flushing %s\n", inode
,
2447 ceph_cap_string(ci
->i_flushing_caps
));
2449 if (!list_empty(&ci
->i_cap_flush_list
)) {
2450 u64 oldest_flush_tid
;
2451 spin_lock(&mdsc
->cap_dirty_lock
);
2452 list_move_tail(&ci
->i_flushing_item
,
2453 &cap
->session
->s_cap_flushing
);
2454 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2455 spin_unlock(&mdsc
->cap_dirty_lock
);
2457 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2458 __kick_flushing_caps(mdsc
, session
, ci
, oldest_flush_tid
);
2459 spin_unlock(&ci
->i_ceph_lock
);
2461 spin_unlock(&ci
->i_ceph_lock
);
2467 * Take references to capabilities we hold, so that we don't release
2468 * them to the MDS prematurely.
2470 * Protected by i_ceph_lock.
2472 static void __take_cap_refs(struct ceph_inode_info
*ci
, int got
,
2473 bool snap_rwsem_locked
)
2475 if (got
& CEPH_CAP_PIN
)
2477 if (got
& CEPH_CAP_FILE_RD
)
2479 if (got
& CEPH_CAP_FILE_CACHE
)
2480 ci
->i_rdcache_ref
++;
2481 if (got
& CEPH_CAP_FILE_WR
) {
2482 if (ci
->i_wr_ref
== 0 && !ci
->i_head_snapc
) {
2483 BUG_ON(!snap_rwsem_locked
);
2484 ci
->i_head_snapc
= ceph_get_snap_context(
2485 ci
->i_snap_realm
->cached_context
);
2489 if (got
& CEPH_CAP_FILE_BUFFER
) {
2490 if (ci
->i_wb_ref
== 0)
2491 ihold(&ci
->vfs_inode
);
2493 dout("__take_cap_refs %p wb %d -> %d (?)\n",
2494 &ci
->vfs_inode
, ci
->i_wb_ref
-1, ci
->i_wb_ref
);
2499 * Try to grab cap references. Specify those refs we @want, and the
2500 * minimal set we @need. Also include the larger offset we are writing
2501 * to (when applicable), and check against max_size here as well.
2502 * Note that caller is responsible for ensuring max_size increases are
2503 * requested from the MDS.
2505 static int try_get_cap_refs(struct ceph_inode_info
*ci
, int need
, int want
,
2506 loff_t endoff
, bool nonblock
, int *got
, int *err
)
2508 struct inode
*inode
= &ci
->vfs_inode
;
2509 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
2511 int have
, implemented
;
2513 bool snap_rwsem_locked
= false;
2515 dout("get_cap_refs %p need %s want %s\n", inode
,
2516 ceph_cap_string(need
), ceph_cap_string(want
));
2519 spin_lock(&ci
->i_ceph_lock
);
2521 /* make sure file is actually open */
2522 file_wanted
= __ceph_caps_file_wanted(ci
);
2523 if ((file_wanted
& need
) != need
) {
2524 dout("try_get_cap_refs need %s file_wanted %s, EBADF\n",
2525 ceph_cap_string(need
), ceph_cap_string(file_wanted
));
2531 /* finish pending truncate */
2532 while (ci
->i_truncate_pending
) {
2533 spin_unlock(&ci
->i_ceph_lock
);
2534 if (snap_rwsem_locked
) {
2535 up_read(&mdsc
->snap_rwsem
);
2536 snap_rwsem_locked
= false;
2538 __ceph_do_pending_vmtruncate(inode
);
2539 spin_lock(&ci
->i_ceph_lock
);
2542 have
= __ceph_caps_issued(ci
, &implemented
);
2544 if (have
& need
& CEPH_CAP_FILE_WR
) {
2545 if (endoff
>= 0 && endoff
> (loff_t
)ci
->i_max_size
) {
2546 dout("get_cap_refs %p endoff %llu > maxsize %llu\n",
2547 inode
, endoff
, ci
->i_max_size
);
2548 if (endoff
> ci
->i_requested_max_size
) {
2555 * If a sync write is in progress, we must wait, so that we
2556 * can get a final snapshot value for size+mtime.
2558 if (__ceph_have_pending_cap_snap(ci
)) {
2559 dout("get_cap_refs %p cap_snap_pending\n", inode
);
2564 if ((have
& need
) == need
) {
2566 * Look at (implemented & ~have & not) so that we keep waiting
2567 * on transition from wanted -> needed caps. This is needed
2568 * for WRBUFFER|WR -> WR to avoid a new WR sync write from
2569 * going before a prior buffered writeback happens.
2571 int not = want
& ~(have
& need
);
2572 int revoking
= implemented
& ~have
;
2573 dout("get_cap_refs %p have %s but not %s (revoking %s)\n",
2574 inode
, ceph_cap_string(have
), ceph_cap_string(not),
2575 ceph_cap_string(revoking
));
2576 if ((revoking
& not) == 0) {
2577 if (!snap_rwsem_locked
&&
2578 !ci
->i_head_snapc
&&
2579 (need
& CEPH_CAP_FILE_WR
)) {
2580 if (!down_read_trylock(&mdsc
->snap_rwsem
)) {
2582 * we can not call down_read() when
2583 * task isn't in TASK_RUNNING state
2591 spin_unlock(&ci
->i_ceph_lock
);
2592 down_read(&mdsc
->snap_rwsem
);
2593 snap_rwsem_locked
= true;
2596 snap_rwsem_locked
= true;
2598 *got
= need
| (have
& want
);
2599 if ((need
& CEPH_CAP_FILE_RD
) &&
2600 !(*got
& CEPH_CAP_FILE_CACHE
))
2601 ceph_disable_fscache_readpage(ci
);
2602 __take_cap_refs(ci
, *got
, true);
2606 int session_readonly
= false;
2607 if ((need
& CEPH_CAP_FILE_WR
) && ci
->i_auth_cap
) {
2608 struct ceph_mds_session
*s
= ci
->i_auth_cap
->session
;
2609 spin_lock(&s
->s_cap_lock
);
2610 session_readonly
= s
->s_readonly
;
2611 spin_unlock(&s
->s_cap_lock
);
2613 if (session_readonly
) {
2614 dout("get_cap_refs %p needed %s but mds%d readonly\n",
2615 inode
, ceph_cap_string(need
), ci
->i_auth_cap
->mds
);
2621 if (ci
->i_ceph_flags
& CEPH_I_CAP_DROPPED
) {
2623 if (READ_ONCE(mdsc
->fsc
->mount_state
) ==
2624 CEPH_MOUNT_SHUTDOWN
) {
2625 dout("get_cap_refs %p forced umount\n", inode
);
2630 mds_wanted
= __ceph_caps_mds_wanted(ci
, false);
2631 if (need
& ~(mds_wanted
& need
)) {
2632 dout("get_cap_refs %p caps were dropped"
2633 " (session killed?)\n", inode
);
2638 if (!(file_wanted
& ~mds_wanted
))
2639 ci
->i_ceph_flags
&= ~CEPH_I_CAP_DROPPED
;
2642 dout("get_cap_refs %p have %s needed %s\n", inode
,
2643 ceph_cap_string(have
), ceph_cap_string(need
));
2646 spin_unlock(&ci
->i_ceph_lock
);
2647 if (snap_rwsem_locked
)
2648 up_read(&mdsc
->snap_rwsem
);
2650 dout("get_cap_refs %p ret %d got %s\n", inode
,
2651 ret
, ceph_cap_string(*got
));
2656 * Check the offset we are writing up to against our current
2657 * max_size. If necessary, tell the MDS we want to write to
2660 static void check_max_size(struct inode
*inode
, loff_t endoff
)
2662 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2665 /* do we need to explicitly request a larger max_size? */
2666 spin_lock(&ci
->i_ceph_lock
);
2667 if (endoff
>= ci
->i_max_size
&& endoff
> ci
->i_wanted_max_size
) {
2668 dout("write %p at large endoff %llu, req max_size\n",
2670 ci
->i_wanted_max_size
= endoff
;
2672 /* duplicate ceph_check_caps()'s logic */
2673 if (ci
->i_auth_cap
&&
2674 (ci
->i_auth_cap
->issued
& CEPH_CAP_FILE_WR
) &&
2675 ci
->i_wanted_max_size
> ci
->i_max_size
&&
2676 ci
->i_wanted_max_size
> ci
->i_requested_max_size
)
2678 spin_unlock(&ci
->i_ceph_lock
);
2680 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
2683 int ceph_try_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
2684 bool nonblock
, int *got
)
2688 BUG_ON(need
& ~CEPH_CAP_FILE_RD
);
2689 BUG_ON(want
& ~(CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
|CEPH_CAP_FILE_SHARED
));
2690 ret
= ceph_pool_perm_check(ci
, need
);
2694 ret
= try_get_cap_refs(ci
, need
, want
, 0, nonblock
, got
, &err
);
2696 if (err
== -EAGAIN
) {
2698 } else if (err
< 0) {
2706 * Wait for caps, and take cap references. If we can't get a WR cap
2707 * due to a small max_size, make sure we check_max_size (and possibly
2708 * ask the mds) so we don't get hung up indefinitely.
2710 int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
2711 loff_t endoff
, int *got
, struct page
**pinned_page
)
2713 int _got
, ret
, err
= 0;
2715 ret
= ceph_pool_perm_check(ci
, need
);
2721 check_max_size(&ci
->vfs_inode
, endoff
);
2725 ret
= try_get_cap_refs(ci
, need
, want
, endoff
,
2726 false, &_got
, &err
);
2733 DEFINE_WAIT_FUNC(wait
, woken_wake_function
);
2734 add_wait_queue(&ci
->i_cap_wq
, &wait
);
2736 while (!try_get_cap_refs(ci
, need
, want
, endoff
,
2737 true, &_got
, &err
)) {
2738 if (signal_pending(current
)) {
2742 wait_woken(&wait
, TASK_INTERRUPTIBLE
, MAX_SCHEDULE_TIMEOUT
);
2745 remove_wait_queue(&ci
->i_cap_wq
, &wait
);
2753 if (err
== -ESTALE
) {
2754 /* session was killed, try renew caps */
2755 ret
= ceph_renew_caps(&ci
->vfs_inode
);
2762 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
2763 (_got
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) &&
2764 i_size_read(&ci
->vfs_inode
) > 0) {
2766 find_get_page(ci
->vfs_inode
.i_mapping
, 0);
2768 if (PageUptodate(page
)) {
2769 *pinned_page
= page
;
2775 * drop cap refs first because getattr while
2776 * holding * caps refs can cause deadlock.
2778 ceph_put_cap_refs(ci
, _got
);
2782 * getattr request will bring inline data into
2785 ret
= __ceph_do_getattr(&ci
->vfs_inode
, NULL
,
2786 CEPH_STAT_CAP_INLINE_DATA
,
2795 if ((_got
& CEPH_CAP_FILE_RD
) && (_got
& CEPH_CAP_FILE_CACHE
))
2796 ceph_fscache_revalidate_cookie(ci
);
2803 * Take cap refs. Caller must already know we hold at least one ref
2804 * on the caps in question or we don't know this is safe.
2806 void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
)
2808 spin_lock(&ci
->i_ceph_lock
);
2809 __take_cap_refs(ci
, caps
, false);
2810 spin_unlock(&ci
->i_ceph_lock
);
2815 * drop cap_snap that is not associated with any snapshot.
2816 * we don't need to send FLUSHSNAP message for it.
2818 static int ceph_try_drop_cap_snap(struct ceph_inode_info
*ci
,
2819 struct ceph_cap_snap
*capsnap
)
2821 if (!capsnap
->need_flush
&&
2822 !capsnap
->writing
&& !capsnap
->dirty_pages
) {
2823 dout("dropping cap_snap %p follows %llu\n",
2824 capsnap
, capsnap
->follows
);
2825 BUG_ON(capsnap
->cap_flush
.tid
> 0);
2826 ceph_put_snap_context(capsnap
->context
);
2827 if (!list_is_last(&capsnap
->ci_item
, &ci
->i_cap_snaps
))
2828 ci
->i_ceph_flags
|= CEPH_I_FLUSH_SNAPS
;
2830 list_del(&capsnap
->ci_item
);
2831 ceph_put_cap_snap(capsnap
);
2840 * If we released the last ref on any given cap, call ceph_check_caps
2841 * to release (or schedule a release).
2843 * If we are releasing a WR cap (from a sync write), finalize any affected
2844 * cap_snap, and wake up any waiters.
2846 void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
)
2848 struct inode
*inode
= &ci
->vfs_inode
;
2849 int last
= 0, put
= 0, flushsnaps
= 0, wake
= 0;
2851 spin_lock(&ci
->i_ceph_lock
);
2852 if (had
& CEPH_CAP_PIN
)
2854 if (had
& CEPH_CAP_FILE_RD
)
2855 if (--ci
->i_rd_ref
== 0)
2857 if (had
& CEPH_CAP_FILE_CACHE
)
2858 if (--ci
->i_rdcache_ref
== 0)
2860 if (had
& CEPH_CAP_FILE_BUFFER
) {
2861 if (--ci
->i_wb_ref
== 0) {
2865 dout("put_cap_refs %p wb %d -> %d (?)\n",
2866 inode
, ci
->i_wb_ref
+1, ci
->i_wb_ref
);
2868 if (had
& CEPH_CAP_FILE_WR
)
2869 if (--ci
->i_wr_ref
== 0) {
2871 if (__ceph_have_pending_cap_snap(ci
)) {
2872 struct ceph_cap_snap
*capsnap
=
2873 list_last_entry(&ci
->i_cap_snaps
,
2874 struct ceph_cap_snap
,
2876 capsnap
->writing
= 0;
2877 if (ceph_try_drop_cap_snap(ci
, capsnap
))
2879 else if (__ceph_finish_cap_snap(ci
, capsnap
))
2883 if (ci
->i_wrbuffer_ref_head
== 0 &&
2884 ci
->i_dirty_caps
== 0 &&
2885 ci
->i_flushing_caps
== 0) {
2886 BUG_ON(!ci
->i_head_snapc
);
2887 ceph_put_snap_context(ci
->i_head_snapc
);
2888 ci
->i_head_snapc
= NULL
;
2890 /* see comment in __ceph_remove_cap() */
2891 if (!__ceph_is_any_caps(ci
) && ci
->i_snap_realm
)
2892 drop_inode_snap_realm(ci
);
2894 spin_unlock(&ci
->i_ceph_lock
);
2896 dout("put_cap_refs %p had %s%s%s\n", inode
, ceph_cap_string(had
),
2897 last
? " last" : "", put
? " put" : "");
2899 if (last
&& !flushsnaps
)
2900 ceph_check_caps(ci
, 0, NULL
);
2901 else if (flushsnaps
)
2902 ceph_flush_snaps(ci
, NULL
);
2904 wake_up_all(&ci
->i_cap_wq
);
2910 * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap
2911 * context. Adjust per-snap dirty page accounting as appropriate.
2912 * Once all dirty data for a cap_snap is flushed, flush snapped file
2913 * metadata back to the MDS. If we dropped the last ref, call
2916 void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
2917 struct ceph_snap_context
*snapc
)
2919 struct inode
*inode
= &ci
->vfs_inode
;
2920 struct ceph_cap_snap
*capsnap
= NULL
;
2924 bool flush_snaps
= false;
2925 bool complete_capsnap
= false;
2927 spin_lock(&ci
->i_ceph_lock
);
2928 ci
->i_wrbuffer_ref
-= nr
;
2929 if (ci
->i_wrbuffer_ref
== 0) {
2934 if (ci
->i_head_snapc
== snapc
) {
2935 ci
->i_wrbuffer_ref_head
-= nr
;
2936 if (ci
->i_wrbuffer_ref_head
== 0 &&
2937 ci
->i_wr_ref
== 0 &&
2938 ci
->i_dirty_caps
== 0 &&
2939 ci
->i_flushing_caps
== 0) {
2940 BUG_ON(!ci
->i_head_snapc
);
2941 ceph_put_snap_context(ci
->i_head_snapc
);
2942 ci
->i_head_snapc
= NULL
;
2944 dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n",
2946 ci
->i_wrbuffer_ref
+nr
, ci
->i_wrbuffer_ref_head
+nr
,
2947 ci
->i_wrbuffer_ref
, ci
->i_wrbuffer_ref_head
,
2948 last
? " LAST" : "");
2950 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
2951 if (capsnap
->context
== snapc
) {
2957 capsnap
->dirty_pages
-= nr
;
2958 if (capsnap
->dirty_pages
== 0) {
2959 complete_capsnap
= true;
2960 if (!capsnap
->writing
) {
2961 if (ceph_try_drop_cap_snap(ci
, capsnap
)) {
2964 ci
->i_ceph_flags
|= CEPH_I_FLUSH_SNAPS
;
2969 dout("put_wrbuffer_cap_refs on %p cap_snap %p "
2970 " snap %lld %d/%d -> %d/%d %s%s\n",
2971 inode
, capsnap
, capsnap
->context
->seq
,
2972 ci
->i_wrbuffer_ref
+nr
, capsnap
->dirty_pages
+ nr
,
2973 ci
->i_wrbuffer_ref
, capsnap
->dirty_pages
,
2974 last
? " (wrbuffer last)" : "",
2975 complete_capsnap
? " (complete capsnap)" : "");
2978 spin_unlock(&ci
->i_ceph_lock
);
2981 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
2982 } else if (flush_snaps
) {
2983 ceph_flush_snaps(ci
, NULL
);
2985 if (complete_capsnap
)
2986 wake_up_all(&ci
->i_cap_wq
);
2992 * Invalidate unlinked inode's aliases, so we can drop the inode ASAP.
2994 static void invalidate_aliases(struct inode
*inode
)
2996 struct dentry
*dn
, *prev
= NULL
;
2998 dout("invalidate_aliases inode %p\n", inode
);
2999 d_prune_aliases(inode
);
3001 * For non-directory inode, d_find_alias() only returns
3002 * hashed dentry. After calling d_invalidate(), the
3003 * dentry becomes unhashed.
3005 * For directory inode, d_find_alias() can return
3006 * unhashed dentry. But directory inode should have
3007 * one alias at most.
3009 while ((dn
= d_find_alias(inode
))) {
3023 struct cap_extra_info
{
3024 struct ceph_string
*pool_ns
;
3033 /* currently issued */
3038 * Handle a cap GRANT message from the MDS. (Note that a GRANT may
3039 * actually be a revocation if it specifies a smaller cap set.)
3041 * caller holds s_mutex and i_ceph_lock, we drop both.
3043 static void handle_cap_grant(struct inode
*inode
,
3044 struct ceph_mds_session
*session
,
3045 struct ceph_cap
*cap
,
3046 struct ceph_mds_caps
*grant
,
3047 struct ceph_buffer
*xattr_buf
,
3048 struct cap_extra_info
*extra_info
)
3049 __releases(ci
->i_ceph_lock
)
3050 __releases(session
->s_mdsc
->snap_rwsem
)
3052 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3053 int seq
= le32_to_cpu(grant
->seq
);
3054 int newcaps
= le32_to_cpu(grant
->caps
);
3055 int used
, wanted
, dirty
;
3056 u64 size
= le64_to_cpu(grant
->size
);
3057 u64 max_size
= le64_to_cpu(grant
->max_size
);
3058 unsigned char check_caps
= 0;
3059 bool was_stale
= cap
->cap_gen
< session
->s_cap_gen
;
3061 bool writeback
= false;
3062 bool queue_trunc
= false;
3063 bool queue_invalidate
= false;
3064 bool deleted_inode
= false;
3065 bool fill_inline
= false;
3067 dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n",
3068 inode
, cap
, session
->s_mds
, seq
, ceph_cap_string(newcaps
));
3069 dout(" size %llu max_size %llu, i_size %llu\n", size
, max_size
,
3074 * If CACHE is being revoked, and we have no dirty buffers,
3075 * try to invalidate (once). (If there are dirty buffers, we
3076 * will invalidate _after_ writeback.)
3078 if (!S_ISDIR(inode
->i_mode
) && /* don't invalidate readdir cache */
3079 ((cap
->issued
& ~newcaps
) & CEPH_CAP_FILE_CACHE
) &&
3080 (newcaps
& CEPH_CAP_FILE_LAZYIO
) == 0 &&
3081 !(ci
->i_wrbuffer_ref
|| ci
->i_wb_ref
)) {
3082 if (try_nonblocking_invalidate(inode
)) {
3083 /* there were locked pages.. invalidate later
3084 in a separate thread. */
3085 if (ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
3086 queue_invalidate
= true;
3087 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
3093 cap
->issued
= cap
->implemented
= CEPH_CAP_PIN
;
3096 * auth mds of the inode changed. we received the cap export message,
3097 * but still haven't received the cap import message. handle_cap_export
3098 * updated the new auth MDS' cap.
3100 * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message
3101 * that was sent before the cap import message. So don't remove caps.
3103 if (ceph_seq_cmp(seq
, cap
->seq
) <= 0) {
3104 WARN_ON(cap
!= ci
->i_auth_cap
);
3105 WARN_ON(cap
->cap_id
!= le64_to_cpu(grant
->cap_id
));
3107 newcaps
|= cap
->issued
;
3110 /* side effects now are allowed */
3111 cap
->cap_gen
= session
->s_cap_gen
;
3114 __check_cap_issue(ci
, cap
, newcaps
);
3116 if ((newcaps
& CEPH_CAP_AUTH_SHARED
) &&
3117 (extra_info
->issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
3118 inode
->i_mode
= le32_to_cpu(grant
->mode
);
3119 inode
->i_uid
= make_kuid(&init_user_ns
, le32_to_cpu(grant
->uid
));
3120 inode
->i_gid
= make_kgid(&init_user_ns
, le32_to_cpu(grant
->gid
));
3121 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
3122 from_kuid(&init_user_ns
, inode
->i_uid
),
3123 from_kgid(&init_user_ns
, inode
->i_gid
));
3126 if ((newcaps
& CEPH_CAP_LINK_SHARED
) &&
3127 (extra_info
->issued
& CEPH_CAP_LINK_EXCL
) == 0) {
3128 set_nlink(inode
, le32_to_cpu(grant
->nlink
));
3129 if (inode
->i_nlink
== 0 &&
3130 (newcaps
& (CEPH_CAP_LINK_SHARED
| CEPH_CAP_LINK_EXCL
)))
3131 deleted_inode
= true;
3134 if ((extra_info
->issued
& CEPH_CAP_XATTR_EXCL
) == 0 &&
3136 int len
= le32_to_cpu(grant
->xattr_len
);
3137 u64 version
= le64_to_cpu(grant
->xattr_version
);
3139 if (version
> ci
->i_xattrs
.version
) {
3140 dout(" got new xattrs v%llu on %p len %d\n",
3141 version
, inode
, len
);
3142 if (ci
->i_xattrs
.blob
)
3143 ceph_buffer_put(ci
->i_xattrs
.blob
);
3144 ci
->i_xattrs
.blob
= ceph_buffer_get(xattr_buf
);
3145 ci
->i_xattrs
.version
= version
;
3146 ceph_forget_all_cached_acls(inode
);
3150 if (newcaps
& CEPH_CAP_ANY_RD
) {
3151 struct timespec64 mtime
, atime
, ctime
;
3152 /* ctime/mtime/atime? */
3153 ceph_decode_timespec64(&mtime
, &grant
->mtime
);
3154 ceph_decode_timespec64(&atime
, &grant
->atime
);
3155 ceph_decode_timespec64(&ctime
, &grant
->ctime
);
3156 ceph_fill_file_time(inode
, extra_info
->issued
,
3157 le32_to_cpu(grant
->time_warp_seq
),
3158 &ctime
, &mtime
, &atime
);
3161 if ((newcaps
& CEPH_CAP_FILE_SHARED
) && extra_info
->dirstat_valid
) {
3162 ci
->i_files
= extra_info
->nfiles
;
3163 ci
->i_subdirs
= extra_info
->nsubdirs
;
3166 if (newcaps
& (CEPH_CAP_ANY_FILE_RD
| CEPH_CAP_ANY_FILE_WR
)) {
3167 /* file layout may have changed */
3168 s64 old_pool
= ci
->i_layout
.pool_id
;
3169 struct ceph_string
*old_ns
;
3171 ceph_file_layout_from_legacy(&ci
->i_layout
, &grant
->layout
);
3172 old_ns
= rcu_dereference_protected(ci
->i_layout
.pool_ns
,
3173 lockdep_is_held(&ci
->i_ceph_lock
));
3174 rcu_assign_pointer(ci
->i_layout
.pool_ns
, extra_info
->pool_ns
);
3176 if (ci
->i_layout
.pool_id
!= old_pool
||
3177 extra_info
->pool_ns
!= old_ns
)
3178 ci
->i_ceph_flags
&= ~CEPH_I_POOL_PERM
;
3180 extra_info
->pool_ns
= old_ns
;
3182 /* size/truncate_seq? */
3183 queue_trunc
= ceph_fill_file_size(inode
, extra_info
->issued
,
3184 le32_to_cpu(grant
->truncate_seq
),
3185 le64_to_cpu(grant
->truncate_size
),
3189 if (ci
->i_auth_cap
== cap
&& (newcaps
& CEPH_CAP_ANY_FILE_WR
)) {
3190 if (max_size
!= ci
->i_max_size
) {
3191 dout("max_size %lld -> %llu\n",
3192 ci
->i_max_size
, max_size
);
3193 ci
->i_max_size
= max_size
;
3194 if (max_size
>= ci
->i_wanted_max_size
) {
3195 ci
->i_wanted_max_size
= 0; /* reset */
3196 ci
->i_requested_max_size
= 0;
3199 } else if (ci
->i_wanted_max_size
> ci
->i_max_size
&&
3200 ci
->i_wanted_max_size
> ci
->i_requested_max_size
) {
3201 /* CEPH_CAP_OP_IMPORT */
3206 /* check cap bits */
3207 wanted
= __ceph_caps_wanted(ci
);
3208 used
= __ceph_caps_used(ci
);
3209 dirty
= __ceph_caps_dirty(ci
);
3210 dout(" my wanted = %s, used = %s, dirty %s\n",
3211 ceph_cap_string(wanted
),
3212 ceph_cap_string(used
),
3213 ceph_cap_string(dirty
));
3215 if ((was_stale
|| le32_to_cpu(grant
->op
) == CEPH_CAP_OP_IMPORT
) &&
3216 (wanted
& ~(cap
->mds_wanted
| newcaps
))) {
3218 * If mds is importing cap, prior cap messages that update
3219 * 'wanted' may get dropped by mds (migrate seq mismatch).
3221 * We don't send cap message to update 'wanted' if what we
3222 * want are already issued. If mds revokes caps, cap message
3223 * that releases caps also tells mds what we want. But if
3224 * caps got revoked by mds forcedly (session stale). We may
3225 * haven't told mds what we want.
3230 /* revocation, grant, or no-op? */
3231 if (cap
->issued
& ~newcaps
) {
3232 int revoking
= cap
->issued
& ~newcaps
;
3234 dout("revocation: %s -> %s (revoking %s)\n",
3235 ceph_cap_string(cap
->issued
),
3236 ceph_cap_string(newcaps
),
3237 ceph_cap_string(revoking
));
3238 if (revoking
& used
& CEPH_CAP_FILE_BUFFER
)
3239 writeback
= true; /* initiate writeback; will delay ack */
3240 else if (revoking
== CEPH_CAP_FILE_CACHE
&&
3241 (newcaps
& CEPH_CAP_FILE_LAZYIO
) == 0 &&
3243 ; /* do nothing yet, invalidation will be queued */
3244 else if (cap
== ci
->i_auth_cap
)
3245 check_caps
= 1; /* check auth cap only */
3247 check_caps
= 2; /* check all caps */
3248 cap
->issued
= newcaps
;
3249 cap
->implemented
|= newcaps
;
3250 } else if (cap
->issued
== newcaps
) {
3251 dout("caps unchanged: %s -> %s\n",
3252 ceph_cap_string(cap
->issued
), ceph_cap_string(newcaps
));
3254 dout("grant: %s -> %s\n", ceph_cap_string(cap
->issued
),
3255 ceph_cap_string(newcaps
));
3256 /* non-auth MDS is revoking the newly grant caps ? */
3257 if (cap
== ci
->i_auth_cap
&&
3258 __ceph_caps_revoking_other(ci
, cap
, newcaps
))
3261 cap
->issued
= newcaps
;
3262 cap
->implemented
|= newcaps
; /* add bits only, to
3263 * avoid stepping on a
3264 * pending revocation */
3267 BUG_ON(cap
->issued
& ~cap
->implemented
);
3269 if (extra_info
->inline_version
> 0 &&
3270 extra_info
->inline_version
>= ci
->i_inline_version
) {
3271 ci
->i_inline_version
= extra_info
->inline_version
;
3272 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
3273 (newcaps
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)))
3277 if (le32_to_cpu(grant
->op
) == CEPH_CAP_OP_IMPORT
) {
3278 if (newcaps
& ~extra_info
->issued
)
3280 kick_flushing_inode_caps(session
->s_mdsc
, session
, inode
);
3281 up_read(&session
->s_mdsc
->snap_rwsem
);
3283 spin_unlock(&ci
->i_ceph_lock
);
3287 ceph_fill_inline_data(inode
, NULL
, extra_info
->inline_data
,
3288 extra_info
->inline_len
);
3291 ceph_queue_vmtruncate(inode
);
3295 * queue inode for writeback: we can't actually call
3296 * filemap_write_and_wait, etc. from message handler
3299 ceph_queue_writeback(inode
);
3300 if (queue_invalidate
)
3301 ceph_queue_invalidate(inode
);
3303 invalidate_aliases(inode
);
3305 wake_up_all(&ci
->i_cap_wq
);
3307 if (check_caps
== 1)
3308 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
|CHECK_CAPS_AUTHONLY
,
3310 else if (check_caps
== 2)
3311 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
, session
);
3313 mutex_unlock(&session
->s_mutex
);
3317 * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the
3318 * MDS has been safely committed.
3320 static void handle_cap_flush_ack(struct inode
*inode
, u64 flush_tid
,
3321 struct ceph_mds_caps
*m
,
3322 struct ceph_mds_session
*session
,
3323 struct ceph_cap
*cap
)
3324 __releases(ci
->i_ceph_lock
)
3326 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3327 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
3328 struct ceph_cap_flush
*cf
, *tmp_cf
;
3329 LIST_HEAD(to_remove
);
3330 unsigned seq
= le32_to_cpu(m
->seq
);
3331 int dirty
= le32_to_cpu(m
->dirty
);
3334 bool wake_ci
= false;
3335 bool wake_mdsc
= false;
3337 list_for_each_entry_safe(cf
, tmp_cf
, &ci
->i_cap_flush_list
, i_list
) {
3338 if (cf
->tid
== flush_tid
)
3340 if (cf
->caps
== 0) /* capsnap */
3342 if (cf
->tid
<= flush_tid
) {
3343 if (__finish_cap_flush(NULL
, ci
, cf
))
3345 list_add_tail(&cf
->i_list
, &to_remove
);
3347 cleaned
&= ~cf
->caps
;
3353 dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s,"
3354 " flushing %s -> %s\n",
3355 inode
, session
->s_mds
, seq
, ceph_cap_string(dirty
),
3356 ceph_cap_string(cleaned
), ceph_cap_string(ci
->i_flushing_caps
),
3357 ceph_cap_string(ci
->i_flushing_caps
& ~cleaned
));
3359 if (list_empty(&to_remove
) && !cleaned
)
3362 ci
->i_flushing_caps
&= ~cleaned
;
3364 spin_lock(&mdsc
->cap_dirty_lock
);
3366 list_for_each_entry(cf
, &to_remove
, i_list
) {
3367 if (__finish_cap_flush(mdsc
, NULL
, cf
))
3371 if (ci
->i_flushing_caps
== 0) {
3372 if (list_empty(&ci
->i_cap_flush_list
)) {
3373 list_del_init(&ci
->i_flushing_item
);
3374 if (!list_empty(&session
->s_cap_flushing
)) {
3375 dout(" mds%d still flushing cap on %p\n",
3377 &list_first_entry(&session
->s_cap_flushing
,
3378 struct ceph_inode_info
,
3379 i_flushing_item
)->vfs_inode
);
3382 mdsc
->num_cap_flushing
--;
3383 dout(" inode %p now !flushing\n", inode
);
3385 if (ci
->i_dirty_caps
== 0) {
3386 dout(" inode %p now clean\n", inode
);
3387 BUG_ON(!list_empty(&ci
->i_dirty_item
));
3389 if (ci
->i_wr_ref
== 0 &&
3390 ci
->i_wrbuffer_ref_head
== 0) {
3391 BUG_ON(!ci
->i_head_snapc
);
3392 ceph_put_snap_context(ci
->i_head_snapc
);
3393 ci
->i_head_snapc
= NULL
;
3396 BUG_ON(list_empty(&ci
->i_dirty_item
));
3399 spin_unlock(&mdsc
->cap_dirty_lock
);
3402 spin_unlock(&ci
->i_ceph_lock
);
3404 while (!list_empty(&to_remove
)) {
3405 cf
= list_first_entry(&to_remove
,
3406 struct ceph_cap_flush
, i_list
);
3407 list_del(&cf
->i_list
);
3408 ceph_free_cap_flush(cf
);
3412 wake_up_all(&ci
->i_cap_wq
);
3414 wake_up_all(&mdsc
->cap_flushing_wq
);
3420 * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can
3421 * throw away our cap_snap.
3423 * Caller hold s_mutex.
3425 static void handle_cap_flushsnap_ack(struct inode
*inode
, u64 flush_tid
,
3426 struct ceph_mds_caps
*m
,
3427 struct ceph_mds_session
*session
)
3429 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3430 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
3431 u64 follows
= le64_to_cpu(m
->snap_follows
);
3432 struct ceph_cap_snap
*capsnap
;
3433 bool flushed
= false;
3434 bool wake_ci
= false;
3435 bool wake_mdsc
= false;
3437 dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n",
3438 inode
, ci
, session
->s_mds
, follows
);
3440 spin_lock(&ci
->i_ceph_lock
);
3441 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
3442 if (capsnap
->follows
== follows
) {
3443 if (capsnap
->cap_flush
.tid
!= flush_tid
) {
3444 dout(" cap_snap %p follows %lld tid %lld !="
3445 " %lld\n", capsnap
, follows
,
3446 flush_tid
, capsnap
->cap_flush
.tid
);
3452 dout(" skipping cap_snap %p follows %lld\n",
3453 capsnap
, capsnap
->follows
);
3457 WARN_ON(capsnap
->dirty_pages
|| capsnap
->writing
);
3458 dout(" removing %p cap_snap %p follows %lld\n",
3459 inode
, capsnap
, follows
);
3460 list_del(&capsnap
->ci_item
);
3461 if (__finish_cap_flush(NULL
, ci
, &capsnap
->cap_flush
))
3464 spin_lock(&mdsc
->cap_dirty_lock
);
3466 if (list_empty(&ci
->i_cap_flush_list
))
3467 list_del_init(&ci
->i_flushing_item
);
3469 if (__finish_cap_flush(mdsc
, NULL
, &capsnap
->cap_flush
))
3472 spin_unlock(&mdsc
->cap_dirty_lock
);
3474 spin_unlock(&ci
->i_ceph_lock
);
3476 ceph_put_snap_context(capsnap
->context
);
3477 ceph_put_cap_snap(capsnap
);
3479 wake_up_all(&ci
->i_cap_wq
);
3481 wake_up_all(&mdsc
->cap_flushing_wq
);
3487 * Handle TRUNC from MDS, indicating file truncation.
3489 * caller hold s_mutex.
3491 static void handle_cap_trunc(struct inode
*inode
,
3492 struct ceph_mds_caps
*trunc
,
3493 struct ceph_mds_session
*session
)
3494 __releases(ci
->i_ceph_lock
)
3496 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3497 int mds
= session
->s_mds
;
3498 int seq
= le32_to_cpu(trunc
->seq
);
3499 u32 truncate_seq
= le32_to_cpu(trunc
->truncate_seq
);
3500 u64 truncate_size
= le64_to_cpu(trunc
->truncate_size
);
3501 u64 size
= le64_to_cpu(trunc
->size
);
3502 int implemented
= 0;
3503 int dirty
= __ceph_caps_dirty(ci
);
3504 int issued
= __ceph_caps_issued(ceph_inode(inode
), &implemented
);
3505 int queue_trunc
= 0;
3507 issued
|= implemented
| dirty
;
3509 dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n",
3510 inode
, mds
, seq
, truncate_size
, truncate_seq
);
3511 queue_trunc
= ceph_fill_file_size(inode
, issued
,
3512 truncate_seq
, truncate_size
, size
);
3513 spin_unlock(&ci
->i_ceph_lock
);
3516 ceph_queue_vmtruncate(inode
);
3520 * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a
3521 * different one. If we are the most recent migration we've seen (as
3522 * indicated by mseq), make note of the migrating cap bits for the
3523 * duration (until we see the corresponding IMPORT).
3525 * caller holds s_mutex
3527 static void handle_cap_export(struct inode
*inode
, struct ceph_mds_caps
*ex
,
3528 struct ceph_mds_cap_peer
*ph
,
3529 struct ceph_mds_session
*session
)
3531 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
3532 struct ceph_mds_session
*tsession
= NULL
;
3533 struct ceph_cap
*cap
, *tcap
, *new_cap
= NULL
;
3534 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3536 unsigned mseq
= le32_to_cpu(ex
->migrate_seq
);
3537 unsigned t_seq
, t_mseq
;
3539 int mds
= session
->s_mds
;
3542 t_cap_id
= le64_to_cpu(ph
->cap_id
);
3543 t_seq
= le32_to_cpu(ph
->seq
);
3544 t_mseq
= le32_to_cpu(ph
->mseq
);
3545 target
= le32_to_cpu(ph
->mds
);
3547 t_cap_id
= t_seq
= t_mseq
= 0;
3551 dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n",
3552 inode
, ci
, mds
, mseq
, target
);
3554 spin_lock(&ci
->i_ceph_lock
);
3555 cap
= __get_cap_for_mds(ci
, mds
);
3556 if (!cap
|| cap
->cap_id
!= le64_to_cpu(ex
->cap_id
))
3560 if (cap
->mds_wanted
| cap
->issued
)
3561 ci
->i_ceph_flags
|= CEPH_I_CAP_DROPPED
;
3562 __ceph_remove_cap(cap
, false);
3567 * now we know we haven't received the cap import message yet
3568 * because the exported cap still exist.
3571 issued
= cap
->issued
;
3572 if (issued
!= cap
->implemented
)
3573 pr_err_ratelimited("handle_cap_export: issued != implemented: "
3574 "ino (%llx.%llx) mds%d seq %d mseq %d "
3575 "issued %s implemented %s\n",
3576 ceph_vinop(inode
), mds
, cap
->seq
, cap
->mseq
,
3577 ceph_cap_string(issued
),
3578 ceph_cap_string(cap
->implemented
));
3581 tcap
= __get_cap_for_mds(ci
, target
);
3583 /* already have caps from the target */
3584 if (tcap
->cap_id
== t_cap_id
&&
3585 ceph_seq_cmp(tcap
->seq
, t_seq
) < 0) {
3586 dout(" updating import cap %p mds%d\n", tcap
, target
);
3587 tcap
->cap_id
= t_cap_id
;
3588 tcap
->seq
= t_seq
- 1;
3589 tcap
->issue_seq
= t_seq
- 1;
3590 tcap
->issued
|= issued
;
3591 tcap
->implemented
|= issued
;
3592 if (cap
== ci
->i_auth_cap
)
3593 ci
->i_auth_cap
= tcap
;
3595 if (!list_empty(&ci
->i_cap_flush_list
) &&
3596 ci
->i_auth_cap
== tcap
) {
3597 spin_lock(&mdsc
->cap_dirty_lock
);
3598 list_move_tail(&ci
->i_flushing_item
,
3599 &tcap
->session
->s_cap_flushing
);
3600 spin_unlock(&mdsc
->cap_dirty_lock
);
3603 __ceph_remove_cap(cap
, false);
3605 } else if (tsession
) {
3606 /* add placeholder for the export tagert */
3607 int flag
= (cap
== ci
->i_auth_cap
) ? CEPH_CAP_FLAG_AUTH
: 0;
3609 ceph_add_cap(inode
, tsession
, t_cap_id
, -1, issued
, 0,
3610 t_seq
- 1, t_mseq
, (u64
)-1, flag
, &new_cap
);
3612 if (!list_empty(&ci
->i_cap_flush_list
) &&
3613 ci
->i_auth_cap
== tcap
) {
3614 spin_lock(&mdsc
->cap_dirty_lock
);
3615 list_move_tail(&ci
->i_flushing_item
,
3616 &tcap
->session
->s_cap_flushing
);
3617 spin_unlock(&mdsc
->cap_dirty_lock
);
3620 __ceph_remove_cap(cap
, false);
3624 spin_unlock(&ci
->i_ceph_lock
);
3625 mutex_unlock(&session
->s_mutex
);
3627 /* open target session */
3628 tsession
= ceph_mdsc_open_export_target_session(mdsc
, target
);
3629 if (!IS_ERR(tsession
)) {
3631 mutex_lock(&session
->s_mutex
);
3632 mutex_lock_nested(&tsession
->s_mutex
,
3633 SINGLE_DEPTH_NESTING
);
3635 mutex_lock(&tsession
->s_mutex
);
3636 mutex_lock_nested(&session
->s_mutex
,
3637 SINGLE_DEPTH_NESTING
);
3639 new_cap
= ceph_get_cap(mdsc
, NULL
);
3648 spin_unlock(&ci
->i_ceph_lock
);
3649 mutex_unlock(&session
->s_mutex
);
3651 mutex_unlock(&tsession
->s_mutex
);
3652 ceph_put_mds_session(tsession
);
3655 ceph_put_cap(mdsc
, new_cap
);
3659 * Handle cap IMPORT.
3661 * caller holds s_mutex. acquires i_ceph_lock
3663 static void handle_cap_import(struct ceph_mds_client
*mdsc
,
3664 struct inode
*inode
, struct ceph_mds_caps
*im
,
3665 struct ceph_mds_cap_peer
*ph
,
3666 struct ceph_mds_session
*session
,
3667 struct ceph_cap
**target_cap
, int *old_issued
)
3668 __acquires(ci
->i_ceph_lock
)
3670 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3671 struct ceph_cap
*cap
, *ocap
, *new_cap
= NULL
;
3672 int mds
= session
->s_mds
;
3674 unsigned caps
= le32_to_cpu(im
->caps
);
3675 unsigned wanted
= le32_to_cpu(im
->wanted
);
3676 unsigned seq
= le32_to_cpu(im
->seq
);
3677 unsigned mseq
= le32_to_cpu(im
->migrate_seq
);
3678 u64 realmino
= le64_to_cpu(im
->realm
);
3679 u64 cap_id
= le64_to_cpu(im
->cap_id
);
3684 p_cap_id
= le64_to_cpu(ph
->cap_id
);
3685 peer
= le32_to_cpu(ph
->mds
);
3691 dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n",
3692 inode
, ci
, mds
, mseq
, peer
);
3695 spin_lock(&ci
->i_ceph_lock
);
3696 cap
= __get_cap_for_mds(ci
, mds
);
3699 spin_unlock(&ci
->i_ceph_lock
);
3700 new_cap
= ceph_get_cap(mdsc
, NULL
);
3706 ceph_put_cap(mdsc
, new_cap
);
3711 __ceph_caps_issued(ci
, &issued
);
3712 issued
|= __ceph_caps_dirty(ci
);
3714 ceph_add_cap(inode
, session
, cap_id
, -1, caps
, wanted
, seq
, mseq
,
3715 realmino
, CEPH_CAP_FLAG_AUTH
, &new_cap
);
3717 ocap
= peer
>= 0 ? __get_cap_for_mds(ci
, peer
) : NULL
;
3718 if (ocap
&& ocap
->cap_id
== p_cap_id
) {
3719 dout(" remove export cap %p mds%d flags %d\n",
3720 ocap
, peer
, ph
->flags
);
3721 if ((ph
->flags
& CEPH_CAP_FLAG_AUTH
) &&
3722 (ocap
->seq
!= le32_to_cpu(ph
->seq
) ||
3723 ocap
->mseq
!= le32_to_cpu(ph
->mseq
))) {
3724 pr_err_ratelimited("handle_cap_import: "
3725 "mismatched seq/mseq: ino (%llx.%llx) "
3726 "mds%d seq %d mseq %d importer mds%d "
3727 "has peer seq %d mseq %d\n",
3728 ceph_vinop(inode
), peer
, ocap
->seq
,
3729 ocap
->mseq
, mds
, le32_to_cpu(ph
->seq
),
3730 le32_to_cpu(ph
->mseq
));
3732 __ceph_remove_cap(ocap
, (ph
->flags
& CEPH_CAP_FLAG_RELEASE
));
3735 /* make sure we re-request max_size, if necessary */
3736 ci
->i_requested_max_size
= 0;
3738 *old_issued
= issued
;
3743 * Handle a caps message from the MDS.
3745 * Identify the appropriate session, inode, and call the right handler
3746 * based on the cap op.
3748 void ceph_handle_caps(struct ceph_mds_session
*session
,
3749 struct ceph_msg
*msg
)
3751 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
3752 struct inode
*inode
;
3753 struct ceph_inode_info
*ci
;
3754 struct ceph_cap
*cap
;
3755 struct ceph_mds_caps
*h
;
3756 struct ceph_mds_cap_peer
*peer
= NULL
;
3757 struct ceph_snap_realm
*realm
= NULL
;
3759 int msg_version
= le16_to_cpu(msg
->hdr
.version
);
3761 struct ceph_vino vino
;
3763 size_t snaptrace_len
;
3765 struct cap_extra_info extra_info
= {};
3767 dout("handle_caps from mds%d\n", session
->s_mds
);
3770 end
= msg
->front
.iov_base
+ msg
->front
.iov_len
;
3771 if (msg
->front
.iov_len
< sizeof(*h
))
3773 h
= msg
->front
.iov_base
;
3774 op
= le32_to_cpu(h
->op
);
3775 vino
.ino
= le64_to_cpu(h
->ino
);
3776 vino
.snap
= CEPH_NOSNAP
;
3777 seq
= le32_to_cpu(h
->seq
);
3778 mseq
= le32_to_cpu(h
->migrate_seq
);
3781 snaptrace_len
= le32_to_cpu(h
->snap_trace_len
);
3782 p
= snaptrace
+ snaptrace_len
;
3784 if (msg_version
>= 2) {
3786 ceph_decode_32_safe(&p
, end
, flock_len
, bad
);
3787 if (p
+ flock_len
> end
)
3792 if (msg_version
>= 3) {
3793 if (op
== CEPH_CAP_OP_IMPORT
) {
3794 if (p
+ sizeof(*peer
) > end
)
3798 } else if (op
== CEPH_CAP_OP_EXPORT
) {
3799 /* recorded in unused fields */
3800 peer
= (void *)&h
->size
;
3804 if (msg_version
>= 4) {
3805 ceph_decode_64_safe(&p
, end
, extra_info
.inline_version
, bad
);
3806 ceph_decode_32_safe(&p
, end
, extra_info
.inline_len
, bad
);
3807 if (p
+ extra_info
.inline_len
> end
)
3809 extra_info
.inline_data
= p
;
3810 p
+= extra_info
.inline_len
;
3813 if (msg_version
>= 5) {
3814 struct ceph_osd_client
*osdc
= &mdsc
->fsc
->client
->osdc
;
3817 ceph_decode_32_safe(&p
, end
, epoch_barrier
, bad
);
3818 ceph_osdc_update_epoch_barrier(osdc
, epoch_barrier
);
3821 if (msg_version
>= 8) {
3823 u32 caller_uid
, caller_gid
;
3827 ceph_decode_64_safe(&p
, end
, flush_tid
, bad
);
3829 ceph_decode_32_safe(&p
, end
, caller_uid
, bad
);
3830 ceph_decode_32_safe(&p
, end
, caller_gid
, bad
);
3832 ceph_decode_32_safe(&p
, end
, pool_ns_len
, bad
);
3833 if (pool_ns_len
> 0) {
3834 ceph_decode_need(&p
, end
, pool_ns_len
, bad
);
3835 extra_info
.pool_ns
=
3836 ceph_find_or_create_string(p
, pool_ns_len
);
3841 if (msg_version
>= 11) {
3842 struct ceph_timespec
*btime
;
3847 if (p
+ sizeof(*btime
) > end
)
3850 p
+= sizeof(*btime
);
3851 ceph_decode_64_safe(&p
, end
, change_attr
, bad
);
3853 ceph_decode_32_safe(&p
, end
, flags
, bad
);
3855 extra_info
.dirstat_valid
= true;
3856 ceph_decode_64_safe(&p
, end
, extra_info
.nfiles
, bad
);
3857 ceph_decode_64_safe(&p
, end
, extra_info
.nsubdirs
, bad
);
3861 inode
= ceph_find_inode(mdsc
->fsc
->sb
, vino
);
3862 ci
= ceph_inode(inode
);
3863 dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op
), vino
.ino
,
3866 mutex_lock(&session
->s_mutex
);
3868 dout(" mds%d seq %lld cap seq %u\n", session
->s_mds
, session
->s_seq
,
3872 dout(" i don't have ino %llx\n", vino
.ino
);
3874 if (op
== CEPH_CAP_OP_IMPORT
) {
3875 cap
= ceph_get_cap(mdsc
, NULL
);
3876 cap
->cap_ino
= vino
.ino
;
3877 cap
->queue_release
= 1;
3878 cap
->cap_id
= le64_to_cpu(h
->cap_id
);
3881 cap
->issue_seq
= seq
;
3882 spin_lock(&session
->s_cap_lock
);
3883 list_add_tail(&cap
->session_caps
,
3884 &session
->s_cap_releases
);
3885 session
->s_num_cap_releases
++;
3886 spin_unlock(&session
->s_cap_lock
);
3888 goto flush_cap_releases
;
3891 /* these will work even if we don't have a cap yet */
3893 case CEPH_CAP_OP_FLUSHSNAP_ACK
:
3894 handle_cap_flushsnap_ack(inode
, le64_to_cpu(msg
->hdr
.tid
),
3898 case CEPH_CAP_OP_EXPORT
:
3899 handle_cap_export(inode
, h
, peer
, session
);
3902 case CEPH_CAP_OP_IMPORT
:
3904 if (snaptrace_len
) {
3905 down_write(&mdsc
->snap_rwsem
);
3906 ceph_update_snap_trace(mdsc
, snaptrace
,
3907 snaptrace
+ snaptrace_len
,
3909 downgrade_write(&mdsc
->snap_rwsem
);
3911 down_read(&mdsc
->snap_rwsem
);
3913 handle_cap_import(mdsc
, inode
, h
, peer
, session
,
3914 &cap
, &extra_info
.issued
);
3915 handle_cap_grant(inode
, session
, cap
,
3916 h
, msg
->middle
, &extra_info
);
3918 ceph_put_snap_realm(mdsc
, realm
);
3922 /* the rest require a cap */
3923 spin_lock(&ci
->i_ceph_lock
);
3924 cap
= __get_cap_for_mds(ceph_inode(inode
), session
->s_mds
);
3926 dout(" no cap on %p ino %llx.%llx from mds%d\n",
3927 inode
, ceph_ino(inode
), ceph_snap(inode
),
3929 spin_unlock(&ci
->i_ceph_lock
);
3930 goto flush_cap_releases
;
3933 /* note that each of these drops i_ceph_lock for us */
3935 case CEPH_CAP_OP_REVOKE
:
3936 case CEPH_CAP_OP_GRANT
:
3937 __ceph_caps_issued(ci
, &extra_info
.issued
);
3938 extra_info
.issued
|= __ceph_caps_dirty(ci
);
3939 handle_cap_grant(inode
, session
, cap
,
3940 h
, msg
->middle
, &extra_info
);
3943 case CEPH_CAP_OP_FLUSH_ACK
:
3944 handle_cap_flush_ack(inode
, le64_to_cpu(msg
->hdr
.tid
),
3948 case CEPH_CAP_OP_TRUNC
:
3949 handle_cap_trunc(inode
, h
, session
);
3953 spin_unlock(&ci
->i_ceph_lock
);
3954 pr_err("ceph_handle_caps: unknown cap op %d %s\n", op
,
3955 ceph_cap_op_name(op
));
3962 * send any cap release message to try to move things
3963 * along for the mds (who clearly thinks we still have this
3966 ceph_send_cap_releases(mdsc
, session
);
3969 mutex_unlock(&session
->s_mutex
);
3972 ceph_put_string(extra_info
.pool_ns
);
3976 pr_err("ceph_handle_caps: corrupt message\n");
3982 * Delayed work handler to process end of delayed cap release LRU list.
3984 void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
)
3986 struct inode
*inode
;
3987 struct ceph_inode_info
*ci
;
3988 int flags
= CHECK_CAPS_NODELAY
;
3990 dout("check_delayed_caps\n");
3992 spin_lock(&mdsc
->cap_delay_lock
);
3993 if (list_empty(&mdsc
->cap_delay_list
))
3995 ci
= list_first_entry(&mdsc
->cap_delay_list
,
3996 struct ceph_inode_info
,
3998 if ((ci
->i_ceph_flags
& CEPH_I_FLUSH
) == 0 &&
3999 time_before(jiffies
, ci
->i_hold_caps_max
))
4001 list_del_init(&ci
->i_cap_delay_list
);
4003 inode
= igrab(&ci
->vfs_inode
);
4004 spin_unlock(&mdsc
->cap_delay_lock
);
4007 dout("check_delayed_caps on %p\n", inode
);
4008 ceph_check_caps(ci
, flags
, NULL
);
4012 spin_unlock(&mdsc
->cap_delay_lock
);
4016 * Flush all dirty caps to the mds
4018 void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
)
4020 struct ceph_inode_info
*ci
;
4021 struct inode
*inode
;
4023 dout("flush_dirty_caps\n");
4024 spin_lock(&mdsc
->cap_dirty_lock
);
4025 while (!list_empty(&mdsc
->cap_dirty
)) {
4026 ci
= list_first_entry(&mdsc
->cap_dirty
, struct ceph_inode_info
,
4028 inode
= &ci
->vfs_inode
;
4030 dout("flush_dirty_caps %p\n", inode
);
4031 spin_unlock(&mdsc
->cap_dirty_lock
);
4032 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
|CHECK_CAPS_FLUSH
, NULL
);
4034 spin_lock(&mdsc
->cap_dirty_lock
);
4036 spin_unlock(&mdsc
->cap_dirty_lock
);
4037 dout("flush_dirty_caps done\n");
4040 void __ceph_get_fmode(struct ceph_inode_info
*ci
, int fmode
)
4043 int bits
= (fmode
<< 1) | 1;
4044 for (i
= 0; i
< CEPH_FILE_MODE_BITS
; i
++) {
4045 if (bits
& (1 << i
))
4046 ci
->i_nr_by_mode
[i
]++;
4051 * Drop open file reference. If we were the last open file,
4052 * we may need to release capabilities to the MDS (or schedule
4053 * their delayed release).
4055 void ceph_put_fmode(struct ceph_inode_info
*ci
, int fmode
)
4058 int bits
= (fmode
<< 1) | 1;
4059 spin_lock(&ci
->i_ceph_lock
);
4060 for (i
= 0; i
< CEPH_FILE_MODE_BITS
; i
++) {
4061 if (bits
& (1 << i
)) {
4062 BUG_ON(ci
->i_nr_by_mode
[i
] == 0);
4063 if (--ci
->i_nr_by_mode
[i
] == 0)
4067 dout("put_fmode %p fmode %d {%d,%d,%d,%d}\n",
4068 &ci
->vfs_inode
, fmode
,
4069 ci
->i_nr_by_mode
[0], ci
->i_nr_by_mode
[1],
4070 ci
->i_nr_by_mode
[2], ci
->i_nr_by_mode
[3]);
4071 spin_unlock(&ci
->i_ceph_lock
);
4073 if (last
&& ci
->i_vino
.snap
== CEPH_NOSNAP
)
4074 ceph_check_caps(ci
, 0, NULL
);
4078 * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it
4079 * looks like the link count will hit 0, drop any other caps (other
4080 * than PIN) we don't specifically want (due to the file still being
4083 int ceph_drop_caps_for_unlink(struct inode
*inode
)
4085 struct ceph_inode_info
*ci
= ceph_inode(inode
);
4086 int drop
= CEPH_CAP_LINK_SHARED
| CEPH_CAP_LINK_EXCL
;
4088 spin_lock(&ci
->i_ceph_lock
);
4089 if (inode
->i_nlink
== 1) {
4090 drop
|= ~(__ceph_caps_wanted(ci
) | CEPH_CAP_PIN
);
4092 ci
->i_ceph_flags
|= CEPH_I_NODELAY
;
4093 if (__ceph_caps_dirty(ci
)) {
4094 struct ceph_mds_client
*mdsc
=
4095 ceph_inode_to_client(inode
)->mdsc
;
4096 __cap_delay_requeue_front(mdsc
, ci
);
4099 spin_unlock(&ci
->i_ceph_lock
);
4104 * Helpers for embedding cap and dentry lease releases into mds
4107 * @force is used by dentry_release (below) to force inclusion of a
4108 * record for the directory inode, even when there aren't any caps to
4111 int ceph_encode_inode_release(void **p
, struct inode
*inode
,
4112 int mds
, int drop
, int unless
, int force
)
4114 struct ceph_inode_info
*ci
= ceph_inode(inode
);
4115 struct ceph_cap
*cap
;
4116 struct ceph_mds_request_release
*rel
= *p
;
4120 spin_lock(&ci
->i_ceph_lock
);
4121 used
= __ceph_caps_used(ci
);
4122 dirty
= __ceph_caps_dirty(ci
);
4124 dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n",
4125 inode
, mds
, ceph_cap_string(used
|dirty
), ceph_cap_string(drop
),
4126 ceph_cap_string(unless
));
4128 /* only drop unused, clean caps */
4129 drop
&= ~(used
| dirty
);
4131 cap
= __get_cap_for_mds(ci
, mds
);
4132 if (cap
&& __cap_is_valid(cap
)) {
4133 unless
&= cap
->issued
;
4135 if (unless
& CEPH_CAP_AUTH_EXCL
)
4136 drop
&= ~CEPH_CAP_AUTH_SHARED
;
4137 if (unless
& CEPH_CAP_LINK_EXCL
)
4138 drop
&= ~CEPH_CAP_LINK_SHARED
;
4139 if (unless
& CEPH_CAP_XATTR_EXCL
)
4140 drop
&= ~CEPH_CAP_XATTR_SHARED
;
4141 if (unless
& CEPH_CAP_FILE_EXCL
)
4142 drop
&= ~CEPH_CAP_FILE_SHARED
;
4145 if (force
|| (cap
->issued
& drop
)) {
4146 if (cap
->issued
& drop
) {
4147 int wanted
= __ceph_caps_wanted(ci
);
4148 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0)
4149 wanted
|= cap
->mds_wanted
;
4150 dout("encode_inode_release %p cap %p "
4151 "%s -> %s, wanted %s -> %s\n", inode
, cap
,
4152 ceph_cap_string(cap
->issued
),
4153 ceph_cap_string(cap
->issued
& ~drop
),
4154 ceph_cap_string(cap
->mds_wanted
),
4155 ceph_cap_string(wanted
));
4157 cap
->issued
&= ~drop
;
4158 cap
->implemented
&= ~drop
;
4159 cap
->mds_wanted
= wanted
;
4161 dout("encode_inode_release %p cap %p %s"
4162 " (force)\n", inode
, cap
,
4163 ceph_cap_string(cap
->issued
));
4166 rel
->ino
= cpu_to_le64(ceph_ino(inode
));
4167 rel
->cap_id
= cpu_to_le64(cap
->cap_id
);
4168 rel
->seq
= cpu_to_le32(cap
->seq
);
4169 rel
->issue_seq
= cpu_to_le32(cap
->issue_seq
);
4170 rel
->mseq
= cpu_to_le32(cap
->mseq
);
4171 rel
->caps
= cpu_to_le32(cap
->implemented
);
4172 rel
->wanted
= cpu_to_le32(cap
->mds_wanted
);
4178 dout("encode_inode_release %p cap %p %s (noop)\n",
4179 inode
, cap
, ceph_cap_string(cap
->issued
));
4182 spin_unlock(&ci
->i_ceph_lock
);
4186 int ceph_encode_dentry_release(void **p
, struct dentry
*dentry
,
4188 int mds
, int drop
, int unless
)
4190 struct dentry
*parent
= NULL
;
4191 struct ceph_mds_request_release
*rel
= *p
;
4192 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
4197 * force an record for the directory caps if we have a dentry lease.
4198 * this is racy (can't take i_ceph_lock and d_lock together), but it
4199 * doesn't have to be perfect; the mds will revoke anything we don't
4202 spin_lock(&dentry
->d_lock
);
4203 if (di
->lease_session
&& di
->lease_session
->s_mds
== mds
)
4206 parent
= dget(dentry
->d_parent
);
4207 dir
= d_inode(parent
);
4209 spin_unlock(&dentry
->d_lock
);
4211 ret
= ceph_encode_inode_release(p
, dir
, mds
, drop
, unless
, force
);
4214 spin_lock(&dentry
->d_lock
);
4215 if (ret
&& di
->lease_session
&& di
->lease_session
->s_mds
== mds
) {
4216 dout("encode_dentry_release %p mds%d seq %d\n",
4217 dentry
, mds
, (int)di
->lease_seq
);
4218 rel
->dname_len
= cpu_to_le32(dentry
->d_name
.len
);
4219 memcpy(*p
, dentry
->d_name
.name
, dentry
->d_name
.len
);
4220 *p
+= dentry
->d_name
.len
;
4221 rel
->dname_seq
= cpu_to_le32(di
->lease_seq
);
4222 __ceph_mdsc_drop_dentry_lease(dentry
);
4224 spin_unlock(&dentry
->d_lock
);