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 spin_unlock(&realm
->inodes_with_caps_lock
);
1039 ceph_put_snap_realm(ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
,
1044 * Remove a cap. Take steps to deal with a racing iterate_session_caps.
1046 * caller should hold i_ceph_lock.
1047 * caller will not hold session s_mutex if called from destroy_inode.
1049 void __ceph_remove_cap(struct ceph_cap
*cap
, bool queue_release
)
1051 struct ceph_mds_session
*session
= cap
->session
;
1052 struct ceph_inode_info
*ci
= cap
->ci
;
1053 struct ceph_mds_client
*mdsc
=
1054 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
1057 dout("__ceph_remove_cap %p from %p\n", cap
, &ci
->vfs_inode
);
1059 /* remove from session list */
1060 spin_lock(&session
->s_cap_lock
);
1061 if (session
->s_cap_iterator
== cap
) {
1062 /* not yet, we are iterating over this very cap */
1063 dout("__ceph_remove_cap delaying %p removal from session %p\n",
1066 list_del_init(&cap
->session_caps
);
1067 session
->s_nr_caps
--;
1068 cap
->session
= NULL
;
1071 /* protect backpointer with s_cap_lock: see iterate_session_caps */
1075 * s_cap_reconnect is protected by s_cap_lock. no one changes
1076 * s_cap_gen while session is in the reconnect state.
1078 if (queue_release
&&
1079 (!session
->s_cap_reconnect
|| cap
->cap_gen
== session
->s_cap_gen
)) {
1080 cap
->queue_release
= 1;
1082 list_add_tail(&cap
->session_caps
,
1083 &session
->s_cap_releases
);
1084 session
->s_num_cap_releases
++;
1088 cap
->queue_release
= 0;
1090 cap
->cap_ino
= ci
->i_vino
.ino
;
1092 spin_unlock(&session
->s_cap_lock
);
1094 /* remove from inode list */
1095 rb_erase(&cap
->ci_node
, &ci
->i_caps
);
1096 if (ci
->i_auth_cap
== cap
)
1097 ci
->i_auth_cap
= NULL
;
1100 ceph_put_cap(mdsc
, cap
);
1102 /* when reconnect denied, we remove session caps forcibly,
1103 * i_wr_ref can be non-zero. If there are ongoing write,
1104 * keep i_snap_realm.
1106 if (!__ceph_is_any_caps(ci
) && ci
->i_wr_ref
== 0 && ci
->i_snap_realm
)
1107 drop_inode_snap_realm(ci
);
1109 if (!__ceph_is_any_real_caps(ci
))
1110 __cap_delay_cancel(mdsc
, ci
);
1113 struct cap_msg_args
{
1114 struct ceph_mds_session
*session
;
1115 u64 ino
, cid
, follows
;
1116 u64 flush_tid
, oldest_flush_tid
, size
, max_size
;
1118 struct ceph_buffer
*xattr_buf
;
1119 struct timespec64 atime
, mtime
, ctime
;
1120 int op
, caps
, wanted
, dirty
;
1121 u32 seq
, issue_seq
, mseq
, time_warp_seq
;
1130 * Build and send a cap message to the given MDS.
1132 * Caller should be holding s_mutex.
1134 static int send_cap_msg(struct cap_msg_args
*arg
)
1136 struct ceph_mds_caps
*fc
;
1137 struct ceph_msg
*msg
;
1140 struct timespec64 zerotime
= {0};
1141 struct ceph_osd_client
*osdc
= &arg
->session
->s_mdsc
->fsc
->client
->osdc
;
1143 dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s"
1144 " seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu"
1145 " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(arg
->op
),
1146 arg
->cid
, arg
->ino
, ceph_cap_string(arg
->caps
),
1147 ceph_cap_string(arg
->wanted
), ceph_cap_string(arg
->dirty
),
1148 arg
->seq
, arg
->issue_seq
, arg
->flush_tid
, arg
->oldest_flush_tid
,
1149 arg
->mseq
, arg
->follows
, arg
->size
, arg
->max_size
,
1151 arg
->xattr_buf
? (int)arg
->xattr_buf
->vec
.iov_len
: 0);
1153 /* flock buffer size + inline version + inline data size +
1154 * osd_epoch_barrier + oldest_flush_tid */
1155 extra_len
= 4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4;
1156 msg
= ceph_msg_new(CEPH_MSG_CLIENT_CAPS
, sizeof(*fc
) + extra_len
,
1161 msg
->hdr
.version
= cpu_to_le16(10);
1162 msg
->hdr
.tid
= cpu_to_le64(arg
->flush_tid
);
1164 fc
= msg
->front
.iov_base
;
1165 memset(fc
, 0, sizeof(*fc
));
1167 fc
->cap_id
= cpu_to_le64(arg
->cid
);
1168 fc
->op
= cpu_to_le32(arg
->op
);
1169 fc
->seq
= cpu_to_le32(arg
->seq
);
1170 fc
->issue_seq
= cpu_to_le32(arg
->issue_seq
);
1171 fc
->migrate_seq
= cpu_to_le32(arg
->mseq
);
1172 fc
->caps
= cpu_to_le32(arg
->caps
);
1173 fc
->wanted
= cpu_to_le32(arg
->wanted
);
1174 fc
->dirty
= cpu_to_le32(arg
->dirty
);
1175 fc
->ino
= cpu_to_le64(arg
->ino
);
1176 fc
->snap_follows
= cpu_to_le64(arg
->follows
);
1178 fc
->size
= cpu_to_le64(arg
->size
);
1179 fc
->max_size
= cpu_to_le64(arg
->max_size
);
1180 ceph_encode_timespec64(&fc
->mtime
, &arg
->mtime
);
1181 ceph_encode_timespec64(&fc
->atime
, &arg
->atime
);
1182 ceph_encode_timespec64(&fc
->ctime
, &arg
->ctime
);
1183 fc
->time_warp_seq
= cpu_to_le32(arg
->time_warp_seq
);
1185 fc
->uid
= cpu_to_le32(from_kuid(&init_user_ns
, arg
->uid
));
1186 fc
->gid
= cpu_to_le32(from_kgid(&init_user_ns
, arg
->gid
));
1187 fc
->mode
= cpu_to_le32(arg
->mode
);
1189 fc
->xattr_version
= cpu_to_le64(arg
->xattr_version
);
1190 if (arg
->xattr_buf
) {
1191 msg
->middle
= ceph_buffer_get(arg
->xattr_buf
);
1192 fc
->xattr_len
= cpu_to_le32(arg
->xattr_buf
->vec
.iov_len
);
1193 msg
->hdr
.middle_len
= cpu_to_le32(arg
->xattr_buf
->vec
.iov_len
);
1197 /* flock buffer size (version 2) */
1198 ceph_encode_32(&p
, 0);
1199 /* inline version (version 4) */
1200 ceph_encode_64(&p
, arg
->inline_data
? 0 : CEPH_INLINE_NONE
);
1201 /* inline data size */
1202 ceph_encode_32(&p
, 0);
1204 * osd_epoch_barrier (version 5)
1205 * The epoch_barrier is protected osdc->lock, so READ_ONCE here in
1206 * case it was recently changed
1208 ceph_encode_32(&p
, READ_ONCE(osdc
->epoch_barrier
));
1209 /* oldest_flush_tid (version 6) */
1210 ceph_encode_64(&p
, arg
->oldest_flush_tid
);
1213 * caller_uid/caller_gid (version 7)
1215 * Currently, we don't properly track which caller dirtied the caps
1216 * last, and force a flush of them when there is a conflict. For now,
1217 * just set this to 0:0, to emulate how the MDS has worked up to now.
1219 ceph_encode_32(&p
, 0);
1220 ceph_encode_32(&p
, 0);
1222 /* pool namespace (version 8) (mds always ignores this) */
1223 ceph_encode_32(&p
, 0);
1226 * btime and change_attr (version 9)
1228 * We just zero these out for now, as the MDS ignores them unless
1229 * the requisite feature flags are set (which we don't do yet).
1231 ceph_encode_timespec64(p
, &zerotime
);
1232 p
+= sizeof(struct ceph_timespec
);
1233 ceph_encode_64(&p
, 0);
1235 /* Advisory flags (version 10) */
1236 ceph_encode_32(&p
, arg
->flags
);
1238 ceph_con_send(&arg
->session
->s_con
, msg
);
1243 * Queue cap releases when an inode is dropped from our cache. Since
1244 * inode is about to be destroyed, there is no need for i_ceph_lock.
1246 void ceph_queue_caps_release(struct inode
*inode
)
1248 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1251 p
= rb_first(&ci
->i_caps
);
1253 struct ceph_cap
*cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1255 __ceph_remove_cap(cap
, true);
1260 * Send a cap msg on the given inode. Update our caps state, then
1261 * drop i_ceph_lock and send the message.
1263 * Make note of max_size reported/requested from mds, revoked caps
1264 * that have now been implemented.
1266 * Make half-hearted attempt ot to invalidate page cache if we are
1267 * dropping RDCACHE. Note that this will leave behind locked pages
1268 * that we'll then need to deal with elsewhere.
1270 * Return non-zero if delayed release, or we experienced an error
1271 * such that the caller should requeue + retry later.
1273 * called with i_ceph_lock, then drops it.
1274 * caller should hold snap_rwsem (read), s_mutex.
1276 static int __send_cap(struct ceph_mds_client
*mdsc
, struct ceph_cap
*cap
,
1277 int op
, bool sync
, int used
, int want
, int retain
,
1278 int flushing
, u64 flush_tid
, u64 oldest_flush_tid
)
1279 __releases(cap
->ci
->i_ceph_lock
)
1281 struct ceph_inode_info
*ci
= cap
->ci
;
1282 struct inode
*inode
= &ci
->vfs_inode
;
1283 struct cap_msg_args arg
;
1289 held
= cap
->issued
| cap
->implemented
;
1290 revoking
= cap
->implemented
& ~cap
->issued
;
1291 retain
&= ~revoking
;
1293 dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n",
1294 inode
, cap
, cap
->session
,
1295 ceph_cap_string(held
), ceph_cap_string(held
& retain
),
1296 ceph_cap_string(revoking
));
1297 BUG_ON((retain
& CEPH_CAP_PIN
) == 0);
1299 arg
.session
= cap
->session
;
1301 /* don't release wanted unless we've waited a bit. */
1302 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0 &&
1303 time_before(jiffies
, ci
->i_hold_caps_min
)) {
1304 dout(" delaying issued %s -> %s, wanted %s -> %s on send\n",
1305 ceph_cap_string(cap
->issued
),
1306 ceph_cap_string(cap
->issued
& retain
),
1307 ceph_cap_string(cap
->mds_wanted
),
1308 ceph_cap_string(want
));
1309 want
|= cap
->mds_wanted
;
1310 retain
|= cap
->issued
;
1313 ci
->i_ceph_flags
&= ~(CEPH_I_NODELAY
| CEPH_I_FLUSH
);
1314 if (want
& ~cap
->mds_wanted
) {
1315 /* user space may open/close single file frequently.
1316 * This avoids droping mds_wanted immediately after
1317 * requesting new mds_wanted.
1319 __cap_set_timeouts(mdsc
, ci
);
1322 cap
->issued
&= retain
; /* drop bits we don't want */
1323 if (cap
->implemented
& ~cap
->issued
) {
1325 * Wake up any waiters on wanted -> needed transition.
1326 * This is due to the weird transition from buffered
1327 * to sync IO... we need to flush dirty pages _before_
1328 * allowing sync writes to avoid reordering.
1332 cap
->implemented
&= cap
->issued
| used
;
1333 cap
->mds_wanted
= want
;
1335 arg
.ino
= ceph_vino(inode
).ino
;
1336 arg
.cid
= cap
->cap_id
;
1337 arg
.follows
= flushing
? ci
->i_head_snapc
->seq
: 0;
1338 arg
.flush_tid
= flush_tid
;
1339 arg
.oldest_flush_tid
= oldest_flush_tid
;
1341 arg
.size
= inode
->i_size
;
1342 ci
->i_reported_size
= arg
.size
;
1343 arg
.max_size
= ci
->i_wanted_max_size
;
1344 ci
->i_requested_max_size
= arg
.max_size
;
1346 if (flushing
& CEPH_CAP_XATTR_EXCL
) {
1347 __ceph_build_xattrs_blob(ci
);
1348 arg
.xattr_version
= ci
->i_xattrs
.version
;
1349 arg
.xattr_buf
= ci
->i_xattrs
.blob
;
1351 arg
.xattr_buf
= NULL
;
1354 arg
.mtime
= inode
->i_mtime
;
1355 arg
.atime
= inode
->i_atime
;
1356 arg
.ctime
= inode
->i_ctime
;
1359 arg
.caps
= cap
->implemented
;
1361 arg
.dirty
= flushing
;
1364 arg
.issue_seq
= cap
->issue_seq
;
1365 arg
.mseq
= cap
->mseq
;
1366 arg
.time_warp_seq
= ci
->i_time_warp_seq
;
1368 arg
.uid
= inode
->i_uid
;
1369 arg
.gid
= inode
->i_gid
;
1370 arg
.mode
= inode
->i_mode
;
1372 arg
.inline_data
= ci
->i_inline_version
!= CEPH_INLINE_NONE
;
1373 if (list_empty(&ci
->i_cap_snaps
))
1374 arg
.flags
= CEPH_CLIENT_CAPS_NO_CAPSNAP
;
1376 arg
.flags
= CEPH_CLIENT_CAPS_PENDING_CAPSNAP
;
1378 arg
.flags
|= CEPH_CLIENT_CAPS_SYNC
;
1380 spin_unlock(&ci
->i_ceph_lock
);
1382 ret
= send_cap_msg(&arg
);
1384 dout("error sending cap msg, must requeue %p\n", inode
);
1389 wake_up_all(&ci
->i_cap_wq
);
1394 static inline int __send_flush_snap(struct inode
*inode
,
1395 struct ceph_mds_session
*session
,
1396 struct ceph_cap_snap
*capsnap
,
1397 u32 mseq
, u64 oldest_flush_tid
)
1399 struct cap_msg_args arg
;
1401 arg
.session
= session
;
1402 arg
.ino
= ceph_vino(inode
).ino
;
1404 arg
.follows
= capsnap
->follows
;
1405 arg
.flush_tid
= capsnap
->cap_flush
.tid
;
1406 arg
.oldest_flush_tid
= oldest_flush_tid
;
1408 arg
.size
= capsnap
->size
;
1410 arg
.xattr_version
= capsnap
->xattr_version
;
1411 arg
.xattr_buf
= capsnap
->xattr_blob
;
1413 arg
.atime
= capsnap
->atime
;
1414 arg
.mtime
= capsnap
->mtime
;
1415 arg
.ctime
= capsnap
->ctime
;
1417 arg
.op
= CEPH_CAP_OP_FLUSHSNAP
;
1418 arg
.caps
= capsnap
->issued
;
1420 arg
.dirty
= capsnap
->dirty
;
1425 arg
.time_warp_seq
= capsnap
->time_warp_seq
;
1427 arg
.uid
= capsnap
->uid
;
1428 arg
.gid
= capsnap
->gid
;
1429 arg
.mode
= capsnap
->mode
;
1431 arg
.inline_data
= capsnap
->inline_data
;
1434 return send_cap_msg(&arg
);
1438 * When a snapshot is taken, clients accumulate dirty metadata on
1439 * inodes with capabilities in ceph_cap_snaps to describe the file
1440 * state at the time the snapshot was taken. This must be flushed
1441 * asynchronously back to the MDS once sync writes complete and dirty
1442 * data is written out.
1444 * Called under i_ceph_lock. Takes s_mutex as needed.
1446 static void __ceph_flush_snaps(struct ceph_inode_info
*ci
,
1447 struct ceph_mds_session
*session
)
1448 __releases(ci
->i_ceph_lock
)
1449 __acquires(ci
->i_ceph_lock
)
1451 struct inode
*inode
= &ci
->vfs_inode
;
1452 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
1453 struct ceph_cap_snap
*capsnap
;
1454 u64 oldest_flush_tid
= 0;
1455 u64 first_tid
= 1, last_tid
= 0;
1457 dout("__flush_snaps %p session %p\n", inode
, session
);
1459 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
1461 * we need to wait for sync writes to complete and for dirty
1462 * pages to be written out.
1464 if (capsnap
->dirty_pages
|| capsnap
->writing
)
1467 /* should be removed by ceph_try_drop_cap_snap() */
1468 BUG_ON(!capsnap
->need_flush
);
1470 /* only flush each capsnap once */
1471 if (capsnap
->cap_flush
.tid
> 0) {
1472 dout(" already flushed %p, skipping\n", capsnap
);
1476 spin_lock(&mdsc
->cap_dirty_lock
);
1477 capsnap
->cap_flush
.tid
= ++mdsc
->last_cap_flush_tid
;
1478 list_add_tail(&capsnap
->cap_flush
.g_list
,
1479 &mdsc
->cap_flush_list
);
1480 if (oldest_flush_tid
== 0)
1481 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
1482 if (list_empty(&ci
->i_flushing_item
)) {
1483 list_add_tail(&ci
->i_flushing_item
,
1484 &session
->s_cap_flushing
);
1486 spin_unlock(&mdsc
->cap_dirty_lock
);
1488 list_add_tail(&capsnap
->cap_flush
.i_list
,
1489 &ci
->i_cap_flush_list
);
1492 first_tid
= capsnap
->cap_flush
.tid
;
1493 last_tid
= capsnap
->cap_flush
.tid
;
1496 ci
->i_ceph_flags
&= ~CEPH_I_FLUSH_SNAPS
;
1498 while (first_tid
<= last_tid
) {
1499 struct ceph_cap
*cap
= ci
->i_auth_cap
;
1500 struct ceph_cap_flush
*cf
;
1503 if (!(cap
&& cap
->session
== session
)) {
1504 dout("__flush_snaps %p auth cap %p not mds%d, "
1505 "stop\n", inode
, cap
, session
->s_mds
);
1510 list_for_each_entry(cf
, &ci
->i_cap_flush_list
, i_list
) {
1511 if (cf
->tid
>= first_tid
) {
1519 first_tid
= cf
->tid
+ 1;
1521 capsnap
= container_of(cf
, struct ceph_cap_snap
, cap_flush
);
1522 refcount_inc(&capsnap
->nref
);
1523 spin_unlock(&ci
->i_ceph_lock
);
1525 dout("__flush_snaps %p capsnap %p tid %llu %s\n",
1526 inode
, capsnap
, cf
->tid
, ceph_cap_string(capsnap
->dirty
));
1528 ret
= __send_flush_snap(inode
, session
, capsnap
, cap
->mseq
,
1531 pr_err("__flush_snaps: error sending cap flushsnap, "
1532 "ino (%llx.%llx) tid %llu follows %llu\n",
1533 ceph_vinop(inode
), cf
->tid
, capsnap
->follows
);
1536 ceph_put_cap_snap(capsnap
);
1537 spin_lock(&ci
->i_ceph_lock
);
1541 void ceph_flush_snaps(struct ceph_inode_info
*ci
,
1542 struct ceph_mds_session
**psession
)
1544 struct inode
*inode
= &ci
->vfs_inode
;
1545 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
1546 struct ceph_mds_session
*session
= NULL
;
1549 dout("ceph_flush_snaps %p\n", inode
);
1551 session
= *psession
;
1553 spin_lock(&ci
->i_ceph_lock
);
1554 if (!(ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
)) {
1555 dout(" no capsnap needs flush, doing nothing\n");
1558 if (!ci
->i_auth_cap
) {
1559 dout(" no auth cap (migrating?), doing nothing\n");
1563 mds
= ci
->i_auth_cap
->session
->s_mds
;
1564 if (session
&& session
->s_mds
!= mds
) {
1565 dout(" oops, wrong session %p mutex\n", session
);
1566 mutex_unlock(&session
->s_mutex
);
1567 ceph_put_mds_session(session
);
1571 spin_unlock(&ci
->i_ceph_lock
);
1572 mutex_lock(&mdsc
->mutex
);
1573 session
= __ceph_lookup_mds_session(mdsc
, mds
);
1574 mutex_unlock(&mdsc
->mutex
);
1576 dout(" inverting session/ino locks on %p\n", session
);
1577 mutex_lock(&session
->s_mutex
);
1582 // make sure flushsnap messages are sent in proper order.
1583 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
) {
1584 __kick_flushing_caps(mdsc
, session
, ci
, 0);
1585 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
1588 __ceph_flush_snaps(ci
, session
);
1590 spin_unlock(&ci
->i_ceph_lock
);
1593 *psession
= session
;
1594 } else if (session
) {
1595 mutex_unlock(&session
->s_mutex
);
1596 ceph_put_mds_session(session
);
1598 /* we flushed them all; remove this inode from the queue */
1599 spin_lock(&mdsc
->snap_flush_lock
);
1600 list_del_init(&ci
->i_snap_flush_item
);
1601 spin_unlock(&mdsc
->snap_flush_lock
);
1605 * Mark caps dirty. If inode is newly dirty, return the dirty flags.
1606 * Caller is then responsible for calling __mark_inode_dirty with the
1607 * returned flags value.
1609 int __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
,
1610 struct ceph_cap_flush
**pcf
)
1612 struct ceph_mds_client
*mdsc
=
1613 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
1614 struct inode
*inode
= &ci
->vfs_inode
;
1615 int was
= ci
->i_dirty_caps
;
1618 if (!ci
->i_auth_cap
) {
1619 pr_warn("__mark_dirty_caps %p %llx mask %s, "
1620 "but no auth cap (session was closed?)\n",
1621 inode
, ceph_ino(inode
), ceph_cap_string(mask
));
1625 dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci
->vfs_inode
,
1626 ceph_cap_string(mask
), ceph_cap_string(was
),
1627 ceph_cap_string(was
| mask
));
1628 ci
->i_dirty_caps
|= mask
;
1630 WARN_ON_ONCE(ci
->i_prealloc_cap_flush
);
1631 swap(ci
->i_prealloc_cap_flush
, *pcf
);
1633 if (!ci
->i_head_snapc
) {
1634 WARN_ON_ONCE(!rwsem_is_locked(&mdsc
->snap_rwsem
));
1635 ci
->i_head_snapc
= ceph_get_snap_context(
1636 ci
->i_snap_realm
->cached_context
);
1638 dout(" inode %p now dirty snapc %p auth cap %p\n",
1639 &ci
->vfs_inode
, ci
->i_head_snapc
, ci
->i_auth_cap
);
1640 BUG_ON(!list_empty(&ci
->i_dirty_item
));
1641 spin_lock(&mdsc
->cap_dirty_lock
);
1642 list_add(&ci
->i_dirty_item
, &mdsc
->cap_dirty
);
1643 spin_unlock(&mdsc
->cap_dirty_lock
);
1644 if (ci
->i_flushing_caps
== 0) {
1646 dirty
|= I_DIRTY_SYNC
;
1649 WARN_ON_ONCE(!ci
->i_prealloc_cap_flush
);
1651 BUG_ON(list_empty(&ci
->i_dirty_item
));
1652 if (((was
| ci
->i_flushing_caps
) & CEPH_CAP_FILE_BUFFER
) &&
1653 (mask
& CEPH_CAP_FILE_BUFFER
))
1654 dirty
|= I_DIRTY_DATASYNC
;
1655 __cap_delay_requeue(mdsc
, ci
, true);
1659 struct ceph_cap_flush
*ceph_alloc_cap_flush(void)
1661 return kmem_cache_alloc(ceph_cap_flush_cachep
, GFP_KERNEL
);
1664 void ceph_free_cap_flush(struct ceph_cap_flush
*cf
)
1667 kmem_cache_free(ceph_cap_flush_cachep
, cf
);
1670 static u64
__get_oldest_flush_tid(struct ceph_mds_client
*mdsc
)
1672 if (!list_empty(&mdsc
->cap_flush_list
)) {
1673 struct ceph_cap_flush
*cf
=
1674 list_first_entry(&mdsc
->cap_flush_list
,
1675 struct ceph_cap_flush
, g_list
);
1682 * Remove cap_flush from the mdsc's or inode's flushing cap list.
1683 * Return true if caller needs to wake up flush waiters.
1685 static bool __finish_cap_flush(struct ceph_mds_client
*mdsc
,
1686 struct ceph_inode_info
*ci
,
1687 struct ceph_cap_flush
*cf
)
1689 struct ceph_cap_flush
*prev
;
1690 bool wake
= cf
->wake
;
1692 /* are there older pending cap flushes? */
1693 if (wake
&& cf
->g_list
.prev
!= &mdsc
->cap_flush_list
) {
1694 prev
= list_prev_entry(cf
, g_list
);
1698 list_del(&cf
->g_list
);
1700 if (wake
&& cf
->i_list
.prev
!= &ci
->i_cap_flush_list
) {
1701 prev
= list_prev_entry(cf
, i_list
);
1705 list_del(&cf
->i_list
);
1713 * Add dirty inode to the flushing list. Assigned a seq number so we
1714 * can wait for caps to flush without starving.
1716 * Called under i_ceph_lock.
1718 static int __mark_caps_flushing(struct inode
*inode
,
1719 struct ceph_mds_session
*session
, bool wake
,
1720 u64
*flush_tid
, u64
*oldest_flush_tid
)
1722 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
1723 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1724 struct ceph_cap_flush
*cf
= NULL
;
1727 BUG_ON(ci
->i_dirty_caps
== 0);
1728 BUG_ON(list_empty(&ci
->i_dirty_item
));
1729 BUG_ON(!ci
->i_prealloc_cap_flush
);
1731 flushing
= ci
->i_dirty_caps
;
1732 dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n",
1733 ceph_cap_string(flushing
),
1734 ceph_cap_string(ci
->i_flushing_caps
),
1735 ceph_cap_string(ci
->i_flushing_caps
| flushing
));
1736 ci
->i_flushing_caps
|= flushing
;
1737 ci
->i_dirty_caps
= 0;
1738 dout(" inode %p now !dirty\n", inode
);
1740 swap(cf
, ci
->i_prealloc_cap_flush
);
1741 cf
->caps
= flushing
;
1744 spin_lock(&mdsc
->cap_dirty_lock
);
1745 list_del_init(&ci
->i_dirty_item
);
1747 cf
->tid
= ++mdsc
->last_cap_flush_tid
;
1748 list_add_tail(&cf
->g_list
, &mdsc
->cap_flush_list
);
1749 *oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
1751 if (list_empty(&ci
->i_flushing_item
)) {
1752 list_add_tail(&ci
->i_flushing_item
, &session
->s_cap_flushing
);
1753 mdsc
->num_cap_flushing
++;
1755 spin_unlock(&mdsc
->cap_dirty_lock
);
1757 list_add_tail(&cf
->i_list
, &ci
->i_cap_flush_list
);
1759 *flush_tid
= cf
->tid
;
1764 * try to invalidate mapping pages without blocking.
1766 static int try_nonblocking_invalidate(struct inode
*inode
)
1768 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1769 u32 invalidating_gen
= ci
->i_rdcache_gen
;
1771 spin_unlock(&ci
->i_ceph_lock
);
1772 invalidate_mapping_pages(&inode
->i_data
, 0, -1);
1773 spin_lock(&ci
->i_ceph_lock
);
1775 if (inode
->i_data
.nrpages
== 0 &&
1776 invalidating_gen
== ci
->i_rdcache_gen
) {
1778 dout("try_nonblocking_invalidate %p success\n", inode
);
1779 /* save any racing async invalidate some trouble */
1780 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
- 1;
1783 dout("try_nonblocking_invalidate %p failed\n", inode
);
1787 bool __ceph_should_report_size(struct ceph_inode_info
*ci
)
1789 loff_t size
= ci
->vfs_inode
.i_size
;
1790 /* mds will adjust max size according to the reported size */
1791 if (ci
->i_flushing_caps
& CEPH_CAP_FILE_WR
)
1793 if (size
>= ci
->i_max_size
)
1795 /* half of previous max_size increment has been used */
1796 if (ci
->i_max_size
> ci
->i_reported_size
&&
1797 (size
<< 1) >= ci
->i_max_size
+ ci
->i_reported_size
)
1803 * Swiss army knife function to examine currently used and wanted
1804 * versus held caps. Release, flush, ack revoked caps to mds as
1807 * CHECK_CAPS_NODELAY - caller is delayed work and we should not delay
1808 * cap release further.
1809 * CHECK_CAPS_AUTHONLY - we should only check the auth cap
1810 * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without
1813 void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
1814 struct ceph_mds_session
*session
)
1816 struct ceph_fs_client
*fsc
= ceph_inode_to_client(&ci
->vfs_inode
);
1817 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
1818 struct inode
*inode
= &ci
->vfs_inode
;
1819 struct ceph_cap
*cap
;
1820 u64 flush_tid
, oldest_flush_tid
;
1821 int file_wanted
, used
, cap_used
;
1822 int took_snap_rwsem
= 0; /* true if mdsc->snap_rwsem held */
1823 int issued
, implemented
, want
, retain
, revoking
, flushing
= 0;
1824 int mds
= -1; /* keep track of how far we've gone through i_caps list
1825 to avoid an infinite loop on retry */
1827 int delayed
= 0, sent
= 0;
1828 bool no_delay
= flags
& CHECK_CAPS_NODELAY
;
1829 bool queue_invalidate
= false;
1830 bool tried_invalidate
= false;
1832 /* if we are unmounting, flush any unused caps immediately. */
1836 spin_lock(&ci
->i_ceph_lock
);
1838 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
1839 flags
|= CHECK_CAPS_FLUSH
;
1841 if (!(flags
& CHECK_CAPS_AUTHONLY
) ||
1842 (ci
->i_auth_cap
&& __ceph_is_single_caps(ci
)))
1843 __cap_delay_cancel(mdsc
, ci
);
1847 spin_lock(&ci
->i_ceph_lock
);
1849 file_wanted
= __ceph_caps_file_wanted(ci
);
1850 used
= __ceph_caps_used(ci
);
1851 issued
= __ceph_caps_issued(ci
, &implemented
);
1852 revoking
= implemented
& ~issued
;
1855 retain
= file_wanted
| used
| CEPH_CAP_PIN
;
1856 if (!mdsc
->stopping
&& inode
->i_nlink
> 0) {
1858 retain
|= CEPH_CAP_ANY
; /* be greedy */
1859 } else if (S_ISDIR(inode
->i_mode
) &&
1860 (issued
& CEPH_CAP_FILE_SHARED
) &&
1861 __ceph_dir_is_complete(ci
)) {
1863 * If a directory is complete, we want to keep
1864 * the exclusive cap. So that MDS does not end up
1865 * revoking the shared cap on every create/unlink
1868 if (IS_RDONLY(inode
))
1869 want
= CEPH_CAP_ANY_SHARED
;
1871 want
= CEPH_CAP_ANY_SHARED
| CEPH_CAP_FILE_EXCL
;
1875 retain
|= CEPH_CAP_ANY_SHARED
;
1877 * keep RD only if we didn't have the file open RW,
1878 * because then the mds would revoke it anyway to
1879 * journal max_size=0.
1881 if (ci
->i_max_size
== 0)
1882 retain
|= CEPH_CAP_ANY_RD
;
1886 dout("check_caps %p file_want %s used %s dirty %s flushing %s"
1887 " issued %s revoking %s retain %s %s%s%s\n", inode
,
1888 ceph_cap_string(file_wanted
),
1889 ceph_cap_string(used
), ceph_cap_string(ci
->i_dirty_caps
),
1890 ceph_cap_string(ci
->i_flushing_caps
),
1891 ceph_cap_string(issued
), ceph_cap_string(revoking
),
1892 ceph_cap_string(retain
),
1893 (flags
& CHECK_CAPS_AUTHONLY
) ? " AUTHONLY" : "",
1894 (flags
& CHECK_CAPS_NODELAY
) ? " NODELAY" : "",
1895 (flags
& CHECK_CAPS_FLUSH
) ? " FLUSH" : "");
1898 * If we no longer need to hold onto old our caps, and we may
1899 * have cached pages, but don't want them, then try to invalidate.
1900 * If we fail, it's because pages are locked.... try again later.
1902 if ((!no_delay
|| mdsc
->stopping
) &&
1903 !S_ISDIR(inode
->i_mode
) && /* ignore readdir cache */
1904 !(ci
->i_wb_ref
|| ci
->i_wrbuffer_ref
) && /* no dirty pages... */
1905 inode
->i_data
.nrpages
&& /* have cached pages */
1906 (revoking
& (CEPH_CAP_FILE_CACHE
|
1907 CEPH_CAP_FILE_LAZYIO
)) && /* or revoking cache */
1908 !tried_invalidate
) {
1909 dout("check_caps trying to invalidate on %p\n", inode
);
1910 if (try_nonblocking_invalidate(inode
) < 0) {
1911 dout("check_caps queuing invalidate\n");
1912 queue_invalidate
= true;
1913 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
1915 tried_invalidate
= true;
1919 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
1920 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1922 /* avoid looping forever */
1923 if (mds
>= cap
->mds
||
1924 ((flags
& CHECK_CAPS_AUTHONLY
) && cap
!= ci
->i_auth_cap
))
1927 /* NOTE: no side-effects allowed, until we take s_mutex */
1930 if (ci
->i_auth_cap
&& cap
!= ci
->i_auth_cap
)
1931 cap_used
&= ~ci
->i_auth_cap
->issued
;
1933 revoking
= cap
->implemented
& ~cap
->issued
;
1934 dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n",
1935 cap
->mds
, cap
, ceph_cap_string(cap_used
),
1936 ceph_cap_string(cap
->issued
),
1937 ceph_cap_string(cap
->implemented
),
1938 ceph_cap_string(revoking
));
1940 if (cap
== ci
->i_auth_cap
&&
1941 (cap
->issued
& CEPH_CAP_FILE_WR
)) {
1942 /* request larger max_size from MDS? */
1943 if (ci
->i_wanted_max_size
> ci
->i_max_size
&&
1944 ci
->i_wanted_max_size
> ci
->i_requested_max_size
) {
1945 dout("requesting new max_size\n");
1949 /* approaching file_max? */
1950 if (__ceph_should_report_size(ci
)) {
1951 dout("i_size approaching max_size\n");
1955 /* flush anything dirty? */
1956 if (cap
== ci
->i_auth_cap
) {
1957 if ((flags
& CHECK_CAPS_FLUSH
) && ci
->i_dirty_caps
) {
1958 dout("flushing dirty caps\n");
1961 if (ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
) {
1962 dout("flushing snap caps\n");
1967 /* completed revocation? going down and there are no caps? */
1968 if (revoking
&& (revoking
& cap_used
) == 0) {
1969 dout("completed revocation of %s\n",
1970 ceph_cap_string(cap
->implemented
& ~cap
->issued
));
1974 /* want more caps from mds? */
1975 if (want
& ~(cap
->mds_wanted
| cap
->issued
))
1978 /* things we might delay */
1979 if ((cap
->issued
& ~retain
) == 0)
1980 continue; /* nope, all good */
1986 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0 &&
1987 time_before(jiffies
, ci
->i_hold_caps_max
)) {
1988 dout(" delaying issued %s -> %s, wanted %s -> %s\n",
1989 ceph_cap_string(cap
->issued
),
1990 ceph_cap_string(cap
->issued
& retain
),
1991 ceph_cap_string(cap
->mds_wanted
),
1992 ceph_cap_string(want
));
1998 if (ci
->i_ceph_flags
& CEPH_I_NOFLUSH
) {
1999 dout(" skipping %p I_NOFLUSH set\n", inode
);
2003 if (session
&& session
!= cap
->session
) {
2004 dout("oops, wrong session %p mutex\n", session
);
2005 mutex_unlock(&session
->s_mutex
);
2009 session
= cap
->session
;
2010 if (mutex_trylock(&session
->s_mutex
) == 0) {
2011 dout("inverting session/ino locks on %p\n",
2013 spin_unlock(&ci
->i_ceph_lock
);
2014 if (took_snap_rwsem
) {
2015 up_read(&mdsc
->snap_rwsem
);
2016 took_snap_rwsem
= 0;
2018 mutex_lock(&session
->s_mutex
);
2023 /* kick flushing and flush snaps before sending normal
2025 if (cap
== ci
->i_auth_cap
&&
2027 (CEPH_I_KICK_FLUSH
| CEPH_I_FLUSH_SNAPS
))) {
2028 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
) {
2029 __kick_flushing_caps(mdsc
, session
, ci
, 0);
2030 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2032 if (ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
)
2033 __ceph_flush_snaps(ci
, session
);
2038 /* take snap_rwsem after session mutex */
2039 if (!took_snap_rwsem
) {
2040 if (down_read_trylock(&mdsc
->snap_rwsem
) == 0) {
2041 dout("inverting snap/in locks on %p\n",
2043 spin_unlock(&ci
->i_ceph_lock
);
2044 down_read(&mdsc
->snap_rwsem
);
2045 took_snap_rwsem
= 1;
2048 took_snap_rwsem
= 1;
2051 if (cap
== ci
->i_auth_cap
&& ci
->i_dirty_caps
) {
2052 flushing
= __mark_caps_flushing(inode
, session
, false,
2058 spin_lock(&mdsc
->cap_dirty_lock
);
2059 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2060 spin_unlock(&mdsc
->cap_dirty_lock
);
2063 mds
= cap
->mds
; /* remember mds, so we don't repeat */
2066 /* __send_cap drops i_ceph_lock */
2067 delayed
+= __send_cap(mdsc
, cap
, CEPH_CAP_OP_UPDATE
, false,
2068 cap_used
, want
, retain
, flushing
,
2069 flush_tid
, oldest_flush_tid
);
2070 goto retry
; /* retake i_ceph_lock and restart our cap scan. */
2073 /* Reschedule delayed caps release if we delayed anything */
2075 __cap_delay_requeue(mdsc
, ci
, false);
2077 spin_unlock(&ci
->i_ceph_lock
);
2079 if (queue_invalidate
)
2080 ceph_queue_invalidate(inode
);
2083 mutex_unlock(&session
->s_mutex
);
2084 if (took_snap_rwsem
)
2085 up_read(&mdsc
->snap_rwsem
);
2089 * Try to flush dirty caps back to the auth mds.
2091 static int try_flush_caps(struct inode
*inode
, u64
*ptid
)
2093 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2094 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2095 struct ceph_mds_session
*session
= NULL
;
2097 u64 flush_tid
= 0, oldest_flush_tid
= 0;
2100 spin_lock(&ci
->i_ceph_lock
);
2101 if (ci
->i_ceph_flags
& CEPH_I_NOFLUSH
) {
2102 spin_unlock(&ci
->i_ceph_lock
);
2103 dout("try_flush_caps skipping %p I_NOFLUSH set\n", inode
);
2106 if (ci
->i_dirty_caps
&& ci
->i_auth_cap
) {
2107 struct ceph_cap
*cap
= ci
->i_auth_cap
;
2108 int used
= __ceph_caps_used(ci
);
2109 int want
= __ceph_caps_wanted(ci
);
2112 if (!session
|| session
!= cap
->session
) {
2113 spin_unlock(&ci
->i_ceph_lock
);
2115 mutex_unlock(&session
->s_mutex
);
2116 session
= cap
->session
;
2117 mutex_lock(&session
->s_mutex
);
2120 if (cap
->session
->s_state
< CEPH_MDS_SESSION_OPEN
) {
2121 spin_unlock(&ci
->i_ceph_lock
);
2125 flushing
= __mark_caps_flushing(inode
, session
, true,
2126 &flush_tid
, &oldest_flush_tid
);
2128 /* __send_cap drops i_ceph_lock */
2129 delayed
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
, true,
2130 used
, want
, (cap
->issued
| cap
->implemented
),
2131 flushing
, flush_tid
, oldest_flush_tid
);
2134 spin_lock(&ci
->i_ceph_lock
);
2135 __cap_delay_requeue(mdsc
, ci
, true);
2136 spin_unlock(&ci
->i_ceph_lock
);
2139 if (!list_empty(&ci
->i_cap_flush_list
)) {
2140 struct ceph_cap_flush
*cf
=
2141 list_last_entry(&ci
->i_cap_flush_list
,
2142 struct ceph_cap_flush
, i_list
);
2144 flush_tid
= cf
->tid
;
2146 flushing
= ci
->i_flushing_caps
;
2147 spin_unlock(&ci
->i_ceph_lock
);
2151 mutex_unlock(&session
->s_mutex
);
2158 * Return true if we've flushed caps through the given flush_tid.
2160 static int caps_are_flushed(struct inode
*inode
, u64 flush_tid
)
2162 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2165 spin_lock(&ci
->i_ceph_lock
);
2166 if (!list_empty(&ci
->i_cap_flush_list
)) {
2167 struct ceph_cap_flush
* cf
=
2168 list_first_entry(&ci
->i_cap_flush_list
,
2169 struct ceph_cap_flush
, i_list
);
2170 if (cf
->tid
<= flush_tid
)
2173 spin_unlock(&ci
->i_ceph_lock
);
2178 * wait for any unsafe requests to complete.
2180 static int unsafe_request_wait(struct inode
*inode
)
2182 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2183 struct ceph_mds_request
*req1
= NULL
, *req2
= NULL
;
2186 spin_lock(&ci
->i_unsafe_lock
);
2187 if (S_ISDIR(inode
->i_mode
) && !list_empty(&ci
->i_unsafe_dirops
)) {
2188 req1
= list_last_entry(&ci
->i_unsafe_dirops
,
2189 struct ceph_mds_request
,
2191 ceph_mdsc_get_request(req1
);
2193 if (!list_empty(&ci
->i_unsafe_iops
)) {
2194 req2
= list_last_entry(&ci
->i_unsafe_iops
,
2195 struct ceph_mds_request
,
2196 r_unsafe_target_item
);
2197 ceph_mdsc_get_request(req2
);
2199 spin_unlock(&ci
->i_unsafe_lock
);
2201 dout("unsafe_request_wait %p wait on tid %llu %llu\n",
2202 inode
, req1
? req1
->r_tid
: 0ULL, req2
? req2
->r_tid
: 0ULL);
2204 ret
= !wait_for_completion_timeout(&req1
->r_safe_completion
,
2205 ceph_timeout_jiffies(req1
->r_timeout
));
2208 ceph_mdsc_put_request(req1
);
2211 ret
= !wait_for_completion_timeout(&req2
->r_safe_completion
,
2212 ceph_timeout_jiffies(req2
->r_timeout
));
2215 ceph_mdsc_put_request(req2
);
2220 int ceph_fsync(struct file
*file
, loff_t start
, loff_t end
, int datasync
)
2222 struct inode
*inode
= file
->f_mapping
->host
;
2223 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2228 dout("fsync %p%s\n", inode
, datasync
? " datasync" : "");
2230 ret
= file_write_and_wait_range(file
, start
, end
);
2239 dirty
= try_flush_caps(inode
, &flush_tid
);
2240 dout("fsync dirty caps are %s\n", ceph_cap_string(dirty
));
2242 ret
= unsafe_request_wait(inode
);
2245 * only wait on non-file metadata writeback (the mds
2246 * can recover size and mtime, so we don't need to
2249 if (!ret
&& (dirty
& ~CEPH_CAP_ANY_FILE_WR
)) {
2250 ret
= wait_event_interruptible(ci
->i_cap_wq
,
2251 caps_are_flushed(inode
, flush_tid
));
2253 inode_unlock(inode
);
2255 dout("fsync %p%s result=%d\n", inode
, datasync
? " datasync" : "", ret
);
2260 * Flush any dirty caps back to the mds. If we aren't asked to wait,
2261 * queue inode for flush but don't do so immediately, because we can
2262 * get by with fewer MDS messages if we wait for data writeback to
2265 int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
)
2267 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2271 int wait
= (wbc
->sync_mode
== WB_SYNC_ALL
&& !wbc
->for_sync
);
2273 dout("write_inode %p wait=%d\n", inode
, wait
);
2275 dirty
= try_flush_caps(inode
, &flush_tid
);
2277 err
= wait_event_interruptible(ci
->i_cap_wq
,
2278 caps_are_flushed(inode
, flush_tid
));
2280 struct ceph_mds_client
*mdsc
=
2281 ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2283 spin_lock(&ci
->i_ceph_lock
);
2284 if (__ceph_caps_dirty(ci
))
2285 __cap_delay_requeue_front(mdsc
, ci
);
2286 spin_unlock(&ci
->i_ceph_lock
);
2291 static void __kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2292 struct ceph_mds_session
*session
,
2293 struct ceph_inode_info
*ci
,
2294 u64 oldest_flush_tid
)
2295 __releases(ci
->i_ceph_lock
)
2296 __acquires(ci
->i_ceph_lock
)
2298 struct inode
*inode
= &ci
->vfs_inode
;
2299 struct ceph_cap
*cap
;
2300 struct ceph_cap_flush
*cf
;
2304 list_for_each_entry(cf
, &ci
->i_cap_flush_list
, i_list
) {
2305 if (cf
->tid
< first_tid
)
2308 cap
= ci
->i_auth_cap
;
2309 if (!(cap
&& cap
->session
== session
)) {
2310 pr_err("%p auth cap %p not mds%d ???\n",
2311 inode
, cap
, session
->s_mds
);
2315 first_tid
= cf
->tid
+ 1;
2318 dout("kick_flushing_caps %p cap %p tid %llu %s\n",
2319 inode
, cap
, cf
->tid
, ceph_cap_string(cf
->caps
));
2320 ci
->i_ceph_flags
|= CEPH_I_NODELAY
;
2321 ret
= __send_cap(mdsc
, cap
, CEPH_CAP_OP_FLUSH
,
2322 false, __ceph_caps_used(ci
),
2323 __ceph_caps_wanted(ci
),
2324 cap
->issued
| cap
->implemented
,
2325 cf
->caps
, cf
->tid
, oldest_flush_tid
);
2327 pr_err("kick_flushing_caps: error sending "
2328 "cap flush, ino (%llx.%llx) "
2329 "tid %llu flushing %s\n",
2330 ceph_vinop(inode
), cf
->tid
,
2331 ceph_cap_string(cf
->caps
));
2334 struct ceph_cap_snap
*capsnap
=
2335 container_of(cf
, struct ceph_cap_snap
,
2337 dout("kick_flushing_caps %p capsnap %p tid %llu %s\n",
2338 inode
, capsnap
, cf
->tid
,
2339 ceph_cap_string(capsnap
->dirty
));
2341 refcount_inc(&capsnap
->nref
);
2342 spin_unlock(&ci
->i_ceph_lock
);
2344 ret
= __send_flush_snap(inode
, session
, capsnap
, cap
->mseq
,
2347 pr_err("kick_flushing_caps: error sending "
2348 "cap flushsnap, ino (%llx.%llx) "
2349 "tid %llu follows %llu\n",
2350 ceph_vinop(inode
), cf
->tid
,
2354 ceph_put_cap_snap(capsnap
);
2357 spin_lock(&ci
->i_ceph_lock
);
2361 void ceph_early_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2362 struct ceph_mds_session
*session
)
2364 struct ceph_inode_info
*ci
;
2365 struct ceph_cap
*cap
;
2366 u64 oldest_flush_tid
;
2368 dout("early_kick_flushing_caps mds%d\n", session
->s_mds
);
2370 spin_lock(&mdsc
->cap_dirty_lock
);
2371 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2372 spin_unlock(&mdsc
->cap_dirty_lock
);
2374 list_for_each_entry(ci
, &session
->s_cap_flushing
, i_flushing_item
) {
2375 spin_lock(&ci
->i_ceph_lock
);
2376 cap
= ci
->i_auth_cap
;
2377 if (!(cap
&& cap
->session
== session
)) {
2378 pr_err("%p auth cap %p not mds%d ???\n",
2379 &ci
->vfs_inode
, cap
, session
->s_mds
);
2380 spin_unlock(&ci
->i_ceph_lock
);
2386 * if flushing caps were revoked, we re-send the cap flush
2387 * in client reconnect stage. This guarantees MDS * processes
2388 * the cap flush message before issuing the flushing caps to
2391 if ((cap
->issued
& ci
->i_flushing_caps
) !=
2392 ci
->i_flushing_caps
) {
2393 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2394 __kick_flushing_caps(mdsc
, session
, ci
,
2397 ci
->i_ceph_flags
|= CEPH_I_KICK_FLUSH
;
2400 spin_unlock(&ci
->i_ceph_lock
);
2404 void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2405 struct ceph_mds_session
*session
)
2407 struct ceph_inode_info
*ci
;
2408 struct ceph_cap
*cap
;
2409 u64 oldest_flush_tid
;
2411 dout("kick_flushing_caps mds%d\n", session
->s_mds
);
2413 spin_lock(&mdsc
->cap_dirty_lock
);
2414 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2415 spin_unlock(&mdsc
->cap_dirty_lock
);
2417 list_for_each_entry(ci
, &session
->s_cap_flushing
, i_flushing_item
) {
2418 spin_lock(&ci
->i_ceph_lock
);
2419 cap
= ci
->i_auth_cap
;
2420 if (!(cap
&& cap
->session
== session
)) {
2421 pr_err("%p auth cap %p not mds%d ???\n",
2422 &ci
->vfs_inode
, cap
, session
->s_mds
);
2423 spin_unlock(&ci
->i_ceph_lock
);
2426 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
) {
2427 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2428 __kick_flushing_caps(mdsc
, session
, ci
,
2431 spin_unlock(&ci
->i_ceph_lock
);
2435 static void kick_flushing_inode_caps(struct ceph_mds_client
*mdsc
,
2436 struct ceph_mds_session
*session
,
2437 struct inode
*inode
)
2438 __releases(ci
->i_ceph_lock
)
2440 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2441 struct ceph_cap
*cap
;
2443 cap
= ci
->i_auth_cap
;
2444 dout("kick_flushing_inode_caps %p flushing %s\n", inode
,
2445 ceph_cap_string(ci
->i_flushing_caps
));
2447 if (!list_empty(&ci
->i_cap_flush_list
)) {
2448 u64 oldest_flush_tid
;
2449 spin_lock(&mdsc
->cap_dirty_lock
);
2450 list_move_tail(&ci
->i_flushing_item
,
2451 &cap
->session
->s_cap_flushing
);
2452 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2453 spin_unlock(&mdsc
->cap_dirty_lock
);
2455 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2456 __kick_flushing_caps(mdsc
, session
, ci
, oldest_flush_tid
);
2457 spin_unlock(&ci
->i_ceph_lock
);
2459 spin_unlock(&ci
->i_ceph_lock
);
2465 * Take references to capabilities we hold, so that we don't release
2466 * them to the MDS prematurely.
2468 * Protected by i_ceph_lock.
2470 static void __take_cap_refs(struct ceph_inode_info
*ci
, int got
,
2471 bool snap_rwsem_locked
)
2473 if (got
& CEPH_CAP_PIN
)
2475 if (got
& CEPH_CAP_FILE_RD
)
2477 if (got
& CEPH_CAP_FILE_CACHE
)
2478 ci
->i_rdcache_ref
++;
2479 if (got
& CEPH_CAP_FILE_WR
) {
2480 if (ci
->i_wr_ref
== 0 && !ci
->i_head_snapc
) {
2481 BUG_ON(!snap_rwsem_locked
);
2482 ci
->i_head_snapc
= ceph_get_snap_context(
2483 ci
->i_snap_realm
->cached_context
);
2487 if (got
& CEPH_CAP_FILE_BUFFER
) {
2488 if (ci
->i_wb_ref
== 0)
2489 ihold(&ci
->vfs_inode
);
2491 dout("__take_cap_refs %p wb %d -> %d (?)\n",
2492 &ci
->vfs_inode
, ci
->i_wb_ref
-1, ci
->i_wb_ref
);
2497 * Try to grab cap references. Specify those refs we @want, and the
2498 * minimal set we @need. Also include the larger offset we are writing
2499 * to (when applicable), and check against max_size here as well.
2500 * Note that caller is responsible for ensuring max_size increases are
2501 * requested from the MDS.
2503 static int try_get_cap_refs(struct ceph_inode_info
*ci
, int need
, int want
,
2504 loff_t endoff
, bool nonblock
, int *got
, int *err
)
2506 struct inode
*inode
= &ci
->vfs_inode
;
2507 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
2509 int have
, implemented
;
2511 bool snap_rwsem_locked
= false;
2513 dout("get_cap_refs %p need %s want %s\n", inode
,
2514 ceph_cap_string(need
), ceph_cap_string(want
));
2517 spin_lock(&ci
->i_ceph_lock
);
2519 /* make sure file is actually open */
2520 file_wanted
= __ceph_caps_file_wanted(ci
);
2521 if ((file_wanted
& need
) != need
) {
2522 dout("try_get_cap_refs need %s file_wanted %s, EBADF\n",
2523 ceph_cap_string(need
), ceph_cap_string(file_wanted
));
2529 /* finish pending truncate */
2530 while (ci
->i_truncate_pending
) {
2531 spin_unlock(&ci
->i_ceph_lock
);
2532 if (snap_rwsem_locked
) {
2533 up_read(&mdsc
->snap_rwsem
);
2534 snap_rwsem_locked
= false;
2536 __ceph_do_pending_vmtruncate(inode
);
2537 spin_lock(&ci
->i_ceph_lock
);
2540 have
= __ceph_caps_issued(ci
, &implemented
);
2542 if (have
& need
& CEPH_CAP_FILE_WR
) {
2543 if (endoff
>= 0 && endoff
> (loff_t
)ci
->i_max_size
) {
2544 dout("get_cap_refs %p endoff %llu > maxsize %llu\n",
2545 inode
, endoff
, ci
->i_max_size
);
2546 if (endoff
> ci
->i_requested_max_size
) {
2553 * If a sync write is in progress, we must wait, so that we
2554 * can get a final snapshot value for size+mtime.
2556 if (__ceph_have_pending_cap_snap(ci
)) {
2557 dout("get_cap_refs %p cap_snap_pending\n", inode
);
2562 if ((have
& need
) == need
) {
2564 * Look at (implemented & ~have & not) so that we keep waiting
2565 * on transition from wanted -> needed caps. This is needed
2566 * for WRBUFFER|WR -> WR to avoid a new WR sync write from
2567 * going before a prior buffered writeback happens.
2569 int not = want
& ~(have
& need
);
2570 int revoking
= implemented
& ~have
;
2571 dout("get_cap_refs %p have %s but not %s (revoking %s)\n",
2572 inode
, ceph_cap_string(have
), ceph_cap_string(not),
2573 ceph_cap_string(revoking
));
2574 if ((revoking
& not) == 0) {
2575 if (!snap_rwsem_locked
&&
2576 !ci
->i_head_snapc
&&
2577 (need
& CEPH_CAP_FILE_WR
)) {
2578 if (!down_read_trylock(&mdsc
->snap_rwsem
)) {
2580 * we can not call down_read() when
2581 * task isn't in TASK_RUNNING state
2589 spin_unlock(&ci
->i_ceph_lock
);
2590 down_read(&mdsc
->snap_rwsem
);
2591 snap_rwsem_locked
= true;
2594 snap_rwsem_locked
= true;
2596 *got
= need
| (have
& want
);
2597 if ((need
& CEPH_CAP_FILE_RD
) &&
2598 !(*got
& CEPH_CAP_FILE_CACHE
))
2599 ceph_disable_fscache_readpage(ci
);
2600 __take_cap_refs(ci
, *got
, true);
2604 int session_readonly
= false;
2605 if ((need
& CEPH_CAP_FILE_WR
) && ci
->i_auth_cap
) {
2606 struct ceph_mds_session
*s
= ci
->i_auth_cap
->session
;
2607 spin_lock(&s
->s_cap_lock
);
2608 session_readonly
= s
->s_readonly
;
2609 spin_unlock(&s
->s_cap_lock
);
2611 if (session_readonly
) {
2612 dout("get_cap_refs %p needed %s but mds%d readonly\n",
2613 inode
, ceph_cap_string(need
), ci
->i_auth_cap
->mds
);
2619 if (ci
->i_ceph_flags
& CEPH_I_CAP_DROPPED
) {
2621 if (READ_ONCE(mdsc
->fsc
->mount_state
) ==
2622 CEPH_MOUNT_SHUTDOWN
) {
2623 dout("get_cap_refs %p forced umount\n", inode
);
2628 mds_wanted
= __ceph_caps_mds_wanted(ci
, false);
2629 if (need
& ~(mds_wanted
& need
)) {
2630 dout("get_cap_refs %p caps were dropped"
2631 " (session killed?)\n", inode
);
2636 if (!(file_wanted
& ~mds_wanted
))
2637 ci
->i_ceph_flags
&= ~CEPH_I_CAP_DROPPED
;
2640 dout("get_cap_refs %p have %s needed %s\n", inode
,
2641 ceph_cap_string(have
), ceph_cap_string(need
));
2644 spin_unlock(&ci
->i_ceph_lock
);
2645 if (snap_rwsem_locked
)
2646 up_read(&mdsc
->snap_rwsem
);
2648 dout("get_cap_refs %p ret %d got %s\n", inode
,
2649 ret
, ceph_cap_string(*got
));
2654 * Check the offset we are writing up to against our current
2655 * max_size. If necessary, tell the MDS we want to write to
2658 static void check_max_size(struct inode
*inode
, loff_t endoff
)
2660 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2663 /* do we need to explicitly request a larger max_size? */
2664 spin_lock(&ci
->i_ceph_lock
);
2665 if (endoff
>= ci
->i_max_size
&& endoff
> ci
->i_wanted_max_size
) {
2666 dout("write %p at large endoff %llu, req max_size\n",
2668 ci
->i_wanted_max_size
= endoff
;
2670 /* duplicate ceph_check_caps()'s logic */
2671 if (ci
->i_auth_cap
&&
2672 (ci
->i_auth_cap
->issued
& CEPH_CAP_FILE_WR
) &&
2673 ci
->i_wanted_max_size
> ci
->i_max_size
&&
2674 ci
->i_wanted_max_size
> ci
->i_requested_max_size
)
2676 spin_unlock(&ci
->i_ceph_lock
);
2678 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
2681 int ceph_try_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
2682 bool nonblock
, int *got
)
2686 BUG_ON(need
& ~CEPH_CAP_FILE_RD
);
2687 BUG_ON(want
& ~(CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
|CEPH_CAP_FILE_SHARED
));
2688 ret
= ceph_pool_perm_check(ci
, need
);
2692 ret
= try_get_cap_refs(ci
, need
, want
, 0, nonblock
, got
, &err
);
2694 if (err
== -EAGAIN
) {
2696 } else if (err
< 0) {
2704 * Wait for caps, and take cap references. If we can't get a WR cap
2705 * due to a small max_size, make sure we check_max_size (and possibly
2706 * ask the mds) so we don't get hung up indefinitely.
2708 int ceph_get_caps(struct ceph_inode_info
*ci
, int need
, int want
,
2709 loff_t endoff
, int *got
, struct page
**pinned_page
)
2711 int _got
, ret
, err
= 0;
2713 ret
= ceph_pool_perm_check(ci
, need
);
2719 check_max_size(&ci
->vfs_inode
, endoff
);
2723 ret
= try_get_cap_refs(ci
, need
, want
, endoff
,
2724 false, &_got
, &err
);
2731 DEFINE_WAIT_FUNC(wait
, woken_wake_function
);
2732 add_wait_queue(&ci
->i_cap_wq
, &wait
);
2734 while (!try_get_cap_refs(ci
, need
, want
, endoff
,
2735 true, &_got
, &err
)) {
2736 if (signal_pending(current
)) {
2740 wait_woken(&wait
, TASK_INTERRUPTIBLE
, MAX_SCHEDULE_TIMEOUT
);
2743 remove_wait_queue(&ci
->i_cap_wq
, &wait
);
2751 if (err
== -ESTALE
) {
2752 /* session was killed, try renew caps */
2753 ret
= ceph_renew_caps(&ci
->vfs_inode
);
2760 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
2761 (_got
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) &&
2762 i_size_read(&ci
->vfs_inode
) > 0) {
2764 find_get_page(ci
->vfs_inode
.i_mapping
, 0);
2766 if (PageUptodate(page
)) {
2767 *pinned_page
= page
;
2773 * drop cap refs first because getattr while
2774 * holding * caps refs can cause deadlock.
2776 ceph_put_cap_refs(ci
, _got
);
2780 * getattr request will bring inline data into
2783 ret
= __ceph_do_getattr(&ci
->vfs_inode
, NULL
,
2784 CEPH_STAT_CAP_INLINE_DATA
,
2793 if ((_got
& CEPH_CAP_FILE_RD
) && (_got
& CEPH_CAP_FILE_CACHE
))
2794 ceph_fscache_revalidate_cookie(ci
);
2801 * Take cap refs. Caller must already know we hold at least one ref
2802 * on the caps in question or we don't know this is safe.
2804 void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
)
2806 spin_lock(&ci
->i_ceph_lock
);
2807 __take_cap_refs(ci
, caps
, false);
2808 spin_unlock(&ci
->i_ceph_lock
);
2813 * drop cap_snap that is not associated with any snapshot.
2814 * we don't need to send FLUSHSNAP message for it.
2816 static int ceph_try_drop_cap_snap(struct ceph_inode_info
*ci
,
2817 struct ceph_cap_snap
*capsnap
)
2819 if (!capsnap
->need_flush
&&
2820 !capsnap
->writing
&& !capsnap
->dirty_pages
) {
2821 dout("dropping cap_snap %p follows %llu\n",
2822 capsnap
, capsnap
->follows
);
2823 BUG_ON(capsnap
->cap_flush
.tid
> 0);
2824 ceph_put_snap_context(capsnap
->context
);
2825 if (!list_is_last(&capsnap
->ci_item
, &ci
->i_cap_snaps
))
2826 ci
->i_ceph_flags
|= CEPH_I_FLUSH_SNAPS
;
2828 list_del(&capsnap
->ci_item
);
2829 ceph_put_cap_snap(capsnap
);
2838 * If we released the last ref on any given cap, call ceph_check_caps
2839 * to release (or schedule a release).
2841 * If we are releasing a WR cap (from a sync write), finalize any affected
2842 * cap_snap, and wake up any waiters.
2844 void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
)
2846 struct inode
*inode
= &ci
->vfs_inode
;
2847 int last
= 0, put
= 0, flushsnaps
= 0, wake
= 0;
2849 spin_lock(&ci
->i_ceph_lock
);
2850 if (had
& CEPH_CAP_PIN
)
2852 if (had
& CEPH_CAP_FILE_RD
)
2853 if (--ci
->i_rd_ref
== 0)
2855 if (had
& CEPH_CAP_FILE_CACHE
)
2856 if (--ci
->i_rdcache_ref
== 0)
2858 if (had
& CEPH_CAP_FILE_BUFFER
) {
2859 if (--ci
->i_wb_ref
== 0) {
2863 dout("put_cap_refs %p wb %d -> %d (?)\n",
2864 inode
, ci
->i_wb_ref
+1, ci
->i_wb_ref
);
2866 if (had
& CEPH_CAP_FILE_WR
)
2867 if (--ci
->i_wr_ref
== 0) {
2869 if (__ceph_have_pending_cap_snap(ci
)) {
2870 struct ceph_cap_snap
*capsnap
=
2871 list_last_entry(&ci
->i_cap_snaps
,
2872 struct ceph_cap_snap
,
2874 capsnap
->writing
= 0;
2875 if (ceph_try_drop_cap_snap(ci
, capsnap
))
2877 else if (__ceph_finish_cap_snap(ci
, capsnap
))
2881 if (ci
->i_wrbuffer_ref_head
== 0 &&
2882 ci
->i_dirty_caps
== 0 &&
2883 ci
->i_flushing_caps
== 0) {
2884 BUG_ON(!ci
->i_head_snapc
);
2885 ceph_put_snap_context(ci
->i_head_snapc
);
2886 ci
->i_head_snapc
= NULL
;
2888 /* see comment in __ceph_remove_cap() */
2889 if (!__ceph_is_any_caps(ci
) && ci
->i_snap_realm
)
2890 drop_inode_snap_realm(ci
);
2892 spin_unlock(&ci
->i_ceph_lock
);
2894 dout("put_cap_refs %p had %s%s%s\n", inode
, ceph_cap_string(had
),
2895 last
? " last" : "", put
? " put" : "");
2897 if (last
&& !flushsnaps
)
2898 ceph_check_caps(ci
, 0, NULL
);
2899 else if (flushsnaps
)
2900 ceph_flush_snaps(ci
, NULL
);
2902 wake_up_all(&ci
->i_cap_wq
);
2908 * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap
2909 * context. Adjust per-snap dirty page accounting as appropriate.
2910 * Once all dirty data for a cap_snap is flushed, flush snapped file
2911 * metadata back to the MDS. If we dropped the last ref, call
2914 void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
2915 struct ceph_snap_context
*snapc
)
2917 struct inode
*inode
= &ci
->vfs_inode
;
2918 struct ceph_cap_snap
*capsnap
= NULL
;
2922 bool flush_snaps
= false;
2923 bool complete_capsnap
= false;
2925 spin_lock(&ci
->i_ceph_lock
);
2926 ci
->i_wrbuffer_ref
-= nr
;
2927 if (ci
->i_wrbuffer_ref
== 0) {
2932 if (ci
->i_head_snapc
== snapc
) {
2933 ci
->i_wrbuffer_ref_head
-= nr
;
2934 if (ci
->i_wrbuffer_ref_head
== 0 &&
2935 ci
->i_wr_ref
== 0 &&
2936 ci
->i_dirty_caps
== 0 &&
2937 ci
->i_flushing_caps
== 0) {
2938 BUG_ON(!ci
->i_head_snapc
);
2939 ceph_put_snap_context(ci
->i_head_snapc
);
2940 ci
->i_head_snapc
= NULL
;
2942 dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n",
2944 ci
->i_wrbuffer_ref
+nr
, ci
->i_wrbuffer_ref_head
+nr
,
2945 ci
->i_wrbuffer_ref
, ci
->i_wrbuffer_ref_head
,
2946 last
? " LAST" : "");
2948 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
2949 if (capsnap
->context
== snapc
) {
2955 capsnap
->dirty_pages
-= nr
;
2956 if (capsnap
->dirty_pages
== 0) {
2957 complete_capsnap
= true;
2958 if (!capsnap
->writing
) {
2959 if (ceph_try_drop_cap_snap(ci
, capsnap
)) {
2962 ci
->i_ceph_flags
|= CEPH_I_FLUSH_SNAPS
;
2967 dout("put_wrbuffer_cap_refs on %p cap_snap %p "
2968 " snap %lld %d/%d -> %d/%d %s%s\n",
2969 inode
, capsnap
, capsnap
->context
->seq
,
2970 ci
->i_wrbuffer_ref
+nr
, capsnap
->dirty_pages
+ nr
,
2971 ci
->i_wrbuffer_ref
, capsnap
->dirty_pages
,
2972 last
? " (wrbuffer last)" : "",
2973 complete_capsnap
? " (complete capsnap)" : "");
2976 spin_unlock(&ci
->i_ceph_lock
);
2979 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
2980 } else if (flush_snaps
) {
2981 ceph_flush_snaps(ci
, NULL
);
2983 if (complete_capsnap
)
2984 wake_up_all(&ci
->i_cap_wq
);
2990 * Invalidate unlinked inode's aliases, so we can drop the inode ASAP.
2992 static void invalidate_aliases(struct inode
*inode
)
2994 struct dentry
*dn
, *prev
= NULL
;
2996 dout("invalidate_aliases inode %p\n", inode
);
2997 d_prune_aliases(inode
);
2999 * For non-directory inode, d_find_alias() only returns
3000 * hashed dentry. After calling d_invalidate(), the
3001 * dentry becomes unhashed.
3003 * For directory inode, d_find_alias() can return
3004 * unhashed dentry. But directory inode should have
3005 * one alias at most.
3007 while ((dn
= d_find_alias(inode
))) {
3021 struct cap_extra_info
{
3022 struct ceph_string
*pool_ns
;
3031 /* currently issued */
3036 * Handle a cap GRANT message from the MDS. (Note that a GRANT may
3037 * actually be a revocation if it specifies a smaller cap set.)
3039 * caller holds s_mutex and i_ceph_lock, we drop both.
3041 static void handle_cap_grant(struct inode
*inode
,
3042 struct ceph_mds_session
*session
,
3043 struct ceph_cap
*cap
,
3044 struct ceph_mds_caps
*grant
,
3045 struct ceph_buffer
*xattr_buf
,
3046 struct cap_extra_info
*extra_info
)
3047 __releases(ci
->i_ceph_lock
)
3048 __releases(session
->s_mdsc
->snap_rwsem
)
3050 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3051 int seq
= le32_to_cpu(grant
->seq
);
3052 int newcaps
= le32_to_cpu(grant
->caps
);
3053 int used
, wanted
, dirty
;
3054 u64 size
= le64_to_cpu(grant
->size
);
3055 u64 max_size
= le64_to_cpu(grant
->max_size
);
3056 unsigned char check_caps
= 0;
3057 bool was_stale
= cap
->cap_gen
< session
->s_cap_gen
;
3059 bool writeback
= false;
3060 bool queue_trunc
= false;
3061 bool queue_invalidate
= false;
3062 bool deleted_inode
= false;
3063 bool fill_inline
= false;
3065 dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n",
3066 inode
, cap
, session
->s_mds
, seq
, ceph_cap_string(newcaps
));
3067 dout(" size %llu max_size %llu, i_size %llu\n", size
, max_size
,
3072 * If CACHE is being revoked, and we have no dirty buffers,
3073 * try to invalidate (once). (If there are dirty buffers, we
3074 * will invalidate _after_ writeback.)
3076 if (!S_ISDIR(inode
->i_mode
) && /* don't invalidate readdir cache */
3077 ((cap
->issued
& ~newcaps
) & CEPH_CAP_FILE_CACHE
) &&
3078 (newcaps
& CEPH_CAP_FILE_LAZYIO
) == 0 &&
3079 !(ci
->i_wrbuffer_ref
|| ci
->i_wb_ref
)) {
3080 if (try_nonblocking_invalidate(inode
)) {
3081 /* there were locked pages.. invalidate later
3082 in a separate thread. */
3083 if (ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
3084 queue_invalidate
= true;
3085 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
3091 cap
->issued
= cap
->implemented
= CEPH_CAP_PIN
;
3094 * auth mds of the inode changed. we received the cap export message,
3095 * but still haven't received the cap import message. handle_cap_export
3096 * updated the new auth MDS' cap.
3098 * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message
3099 * that was sent before the cap import message. So don't remove caps.
3101 if (ceph_seq_cmp(seq
, cap
->seq
) <= 0) {
3102 WARN_ON(cap
!= ci
->i_auth_cap
);
3103 WARN_ON(cap
->cap_id
!= le64_to_cpu(grant
->cap_id
));
3105 newcaps
|= cap
->issued
;
3108 /* side effects now are allowed */
3109 cap
->cap_gen
= session
->s_cap_gen
;
3112 __check_cap_issue(ci
, cap
, newcaps
);
3114 if ((newcaps
& CEPH_CAP_AUTH_SHARED
) &&
3115 (extra_info
->issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
3116 inode
->i_mode
= le32_to_cpu(grant
->mode
);
3117 inode
->i_uid
= make_kuid(&init_user_ns
, le32_to_cpu(grant
->uid
));
3118 inode
->i_gid
= make_kgid(&init_user_ns
, le32_to_cpu(grant
->gid
));
3119 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
3120 from_kuid(&init_user_ns
, inode
->i_uid
),
3121 from_kgid(&init_user_ns
, inode
->i_gid
));
3124 if ((newcaps
& CEPH_CAP_LINK_SHARED
) &&
3125 (extra_info
->issued
& CEPH_CAP_LINK_EXCL
) == 0) {
3126 set_nlink(inode
, le32_to_cpu(grant
->nlink
));
3127 if (inode
->i_nlink
== 0 &&
3128 (newcaps
& (CEPH_CAP_LINK_SHARED
| CEPH_CAP_LINK_EXCL
)))
3129 deleted_inode
= true;
3132 if ((extra_info
->issued
& CEPH_CAP_XATTR_EXCL
) == 0 &&
3134 int len
= le32_to_cpu(grant
->xattr_len
);
3135 u64 version
= le64_to_cpu(grant
->xattr_version
);
3137 if (version
> ci
->i_xattrs
.version
) {
3138 dout(" got new xattrs v%llu on %p len %d\n",
3139 version
, inode
, len
);
3140 if (ci
->i_xattrs
.blob
)
3141 ceph_buffer_put(ci
->i_xattrs
.blob
);
3142 ci
->i_xattrs
.blob
= ceph_buffer_get(xattr_buf
);
3143 ci
->i_xattrs
.version
= version
;
3144 ceph_forget_all_cached_acls(inode
);
3148 if (newcaps
& CEPH_CAP_ANY_RD
) {
3149 struct timespec64 mtime
, atime
, ctime
;
3150 /* ctime/mtime/atime? */
3151 ceph_decode_timespec64(&mtime
, &grant
->mtime
);
3152 ceph_decode_timespec64(&atime
, &grant
->atime
);
3153 ceph_decode_timespec64(&ctime
, &grant
->ctime
);
3154 ceph_fill_file_time(inode
, extra_info
->issued
,
3155 le32_to_cpu(grant
->time_warp_seq
),
3156 &ctime
, &mtime
, &atime
);
3159 if ((newcaps
& CEPH_CAP_FILE_SHARED
) && extra_info
->dirstat_valid
) {
3160 ci
->i_files
= extra_info
->nfiles
;
3161 ci
->i_subdirs
= extra_info
->nsubdirs
;
3164 if (newcaps
& (CEPH_CAP_ANY_FILE_RD
| CEPH_CAP_ANY_FILE_WR
)) {
3165 /* file layout may have changed */
3166 s64 old_pool
= ci
->i_layout
.pool_id
;
3167 struct ceph_string
*old_ns
;
3169 ceph_file_layout_from_legacy(&ci
->i_layout
, &grant
->layout
);
3170 old_ns
= rcu_dereference_protected(ci
->i_layout
.pool_ns
,
3171 lockdep_is_held(&ci
->i_ceph_lock
));
3172 rcu_assign_pointer(ci
->i_layout
.pool_ns
, extra_info
->pool_ns
);
3174 if (ci
->i_layout
.pool_id
!= old_pool
||
3175 extra_info
->pool_ns
!= old_ns
)
3176 ci
->i_ceph_flags
&= ~CEPH_I_POOL_PERM
;
3178 extra_info
->pool_ns
= old_ns
;
3180 /* size/truncate_seq? */
3181 queue_trunc
= ceph_fill_file_size(inode
, extra_info
->issued
,
3182 le32_to_cpu(grant
->truncate_seq
),
3183 le64_to_cpu(grant
->truncate_size
),
3187 if (ci
->i_auth_cap
== cap
&& (newcaps
& CEPH_CAP_ANY_FILE_WR
)) {
3188 if (max_size
!= ci
->i_max_size
) {
3189 dout("max_size %lld -> %llu\n",
3190 ci
->i_max_size
, max_size
);
3191 ci
->i_max_size
= max_size
;
3192 if (max_size
>= ci
->i_wanted_max_size
) {
3193 ci
->i_wanted_max_size
= 0; /* reset */
3194 ci
->i_requested_max_size
= 0;
3197 } else if (ci
->i_wanted_max_size
> ci
->i_max_size
&&
3198 ci
->i_wanted_max_size
> ci
->i_requested_max_size
) {
3199 /* CEPH_CAP_OP_IMPORT */
3204 /* check cap bits */
3205 wanted
= __ceph_caps_wanted(ci
);
3206 used
= __ceph_caps_used(ci
);
3207 dirty
= __ceph_caps_dirty(ci
);
3208 dout(" my wanted = %s, used = %s, dirty %s\n",
3209 ceph_cap_string(wanted
),
3210 ceph_cap_string(used
),
3211 ceph_cap_string(dirty
));
3213 if ((was_stale
|| le32_to_cpu(grant
->op
) == CEPH_CAP_OP_IMPORT
) &&
3214 (wanted
& ~(cap
->mds_wanted
| newcaps
))) {
3216 * If mds is importing cap, prior cap messages that update
3217 * 'wanted' may get dropped by mds (migrate seq mismatch).
3219 * We don't send cap message to update 'wanted' if what we
3220 * want are already issued. If mds revokes caps, cap message
3221 * that releases caps also tells mds what we want. But if
3222 * caps got revoked by mds forcedly (session stale). We may
3223 * haven't told mds what we want.
3228 /* revocation, grant, or no-op? */
3229 if (cap
->issued
& ~newcaps
) {
3230 int revoking
= cap
->issued
& ~newcaps
;
3232 dout("revocation: %s -> %s (revoking %s)\n",
3233 ceph_cap_string(cap
->issued
),
3234 ceph_cap_string(newcaps
),
3235 ceph_cap_string(revoking
));
3236 if (revoking
& used
& CEPH_CAP_FILE_BUFFER
)
3237 writeback
= true; /* initiate writeback; will delay ack */
3238 else if (revoking
== CEPH_CAP_FILE_CACHE
&&
3239 (newcaps
& CEPH_CAP_FILE_LAZYIO
) == 0 &&
3241 ; /* do nothing yet, invalidation will be queued */
3242 else if (cap
== ci
->i_auth_cap
)
3243 check_caps
= 1; /* check auth cap only */
3245 check_caps
= 2; /* check all caps */
3246 cap
->issued
= newcaps
;
3247 cap
->implemented
|= newcaps
;
3248 } else if (cap
->issued
== newcaps
) {
3249 dout("caps unchanged: %s -> %s\n",
3250 ceph_cap_string(cap
->issued
), ceph_cap_string(newcaps
));
3252 dout("grant: %s -> %s\n", ceph_cap_string(cap
->issued
),
3253 ceph_cap_string(newcaps
));
3254 /* non-auth MDS is revoking the newly grant caps ? */
3255 if (cap
== ci
->i_auth_cap
&&
3256 __ceph_caps_revoking_other(ci
, cap
, newcaps
))
3259 cap
->issued
= newcaps
;
3260 cap
->implemented
|= newcaps
; /* add bits only, to
3261 * avoid stepping on a
3262 * pending revocation */
3265 BUG_ON(cap
->issued
& ~cap
->implemented
);
3267 if (extra_info
->inline_version
> 0 &&
3268 extra_info
->inline_version
>= ci
->i_inline_version
) {
3269 ci
->i_inline_version
= extra_info
->inline_version
;
3270 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
3271 (newcaps
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)))
3275 if (le32_to_cpu(grant
->op
) == CEPH_CAP_OP_IMPORT
) {
3276 if (newcaps
& ~extra_info
->issued
)
3278 kick_flushing_inode_caps(session
->s_mdsc
, session
, inode
);
3279 up_read(&session
->s_mdsc
->snap_rwsem
);
3281 spin_unlock(&ci
->i_ceph_lock
);
3285 ceph_fill_inline_data(inode
, NULL
, extra_info
->inline_data
,
3286 extra_info
->inline_len
);
3289 ceph_queue_vmtruncate(inode
);
3293 * queue inode for writeback: we can't actually call
3294 * filemap_write_and_wait, etc. from message handler
3297 ceph_queue_writeback(inode
);
3298 if (queue_invalidate
)
3299 ceph_queue_invalidate(inode
);
3301 invalidate_aliases(inode
);
3303 wake_up_all(&ci
->i_cap_wq
);
3305 if (check_caps
== 1)
3306 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
|CHECK_CAPS_AUTHONLY
,
3308 else if (check_caps
== 2)
3309 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
, session
);
3311 mutex_unlock(&session
->s_mutex
);
3315 * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the
3316 * MDS has been safely committed.
3318 static void handle_cap_flush_ack(struct inode
*inode
, u64 flush_tid
,
3319 struct ceph_mds_caps
*m
,
3320 struct ceph_mds_session
*session
,
3321 struct ceph_cap
*cap
)
3322 __releases(ci
->i_ceph_lock
)
3324 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3325 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
3326 struct ceph_cap_flush
*cf
, *tmp_cf
;
3327 LIST_HEAD(to_remove
);
3328 unsigned seq
= le32_to_cpu(m
->seq
);
3329 int dirty
= le32_to_cpu(m
->dirty
);
3332 bool wake_ci
= false;
3333 bool wake_mdsc
= false;
3335 list_for_each_entry_safe(cf
, tmp_cf
, &ci
->i_cap_flush_list
, i_list
) {
3336 if (cf
->tid
== flush_tid
)
3338 if (cf
->caps
== 0) /* capsnap */
3340 if (cf
->tid
<= flush_tid
) {
3341 if (__finish_cap_flush(NULL
, ci
, cf
))
3343 list_add_tail(&cf
->i_list
, &to_remove
);
3345 cleaned
&= ~cf
->caps
;
3351 dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s,"
3352 " flushing %s -> %s\n",
3353 inode
, session
->s_mds
, seq
, ceph_cap_string(dirty
),
3354 ceph_cap_string(cleaned
), ceph_cap_string(ci
->i_flushing_caps
),
3355 ceph_cap_string(ci
->i_flushing_caps
& ~cleaned
));
3357 if (list_empty(&to_remove
) && !cleaned
)
3360 ci
->i_flushing_caps
&= ~cleaned
;
3362 spin_lock(&mdsc
->cap_dirty_lock
);
3364 list_for_each_entry(cf
, &to_remove
, i_list
) {
3365 if (__finish_cap_flush(mdsc
, NULL
, cf
))
3369 if (ci
->i_flushing_caps
== 0) {
3370 if (list_empty(&ci
->i_cap_flush_list
)) {
3371 list_del_init(&ci
->i_flushing_item
);
3372 if (!list_empty(&session
->s_cap_flushing
)) {
3373 dout(" mds%d still flushing cap on %p\n",
3375 &list_first_entry(&session
->s_cap_flushing
,
3376 struct ceph_inode_info
,
3377 i_flushing_item
)->vfs_inode
);
3380 mdsc
->num_cap_flushing
--;
3381 dout(" inode %p now !flushing\n", inode
);
3383 if (ci
->i_dirty_caps
== 0) {
3384 dout(" inode %p now clean\n", inode
);
3385 BUG_ON(!list_empty(&ci
->i_dirty_item
));
3387 if (ci
->i_wr_ref
== 0 &&
3388 ci
->i_wrbuffer_ref_head
== 0) {
3389 BUG_ON(!ci
->i_head_snapc
);
3390 ceph_put_snap_context(ci
->i_head_snapc
);
3391 ci
->i_head_snapc
= NULL
;
3394 BUG_ON(list_empty(&ci
->i_dirty_item
));
3397 spin_unlock(&mdsc
->cap_dirty_lock
);
3400 spin_unlock(&ci
->i_ceph_lock
);
3402 while (!list_empty(&to_remove
)) {
3403 cf
= list_first_entry(&to_remove
,
3404 struct ceph_cap_flush
, i_list
);
3405 list_del(&cf
->i_list
);
3406 ceph_free_cap_flush(cf
);
3410 wake_up_all(&ci
->i_cap_wq
);
3412 wake_up_all(&mdsc
->cap_flushing_wq
);
3418 * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can
3419 * throw away our cap_snap.
3421 * Caller hold s_mutex.
3423 static void handle_cap_flushsnap_ack(struct inode
*inode
, u64 flush_tid
,
3424 struct ceph_mds_caps
*m
,
3425 struct ceph_mds_session
*session
)
3427 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3428 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
3429 u64 follows
= le64_to_cpu(m
->snap_follows
);
3430 struct ceph_cap_snap
*capsnap
;
3431 bool flushed
= false;
3432 bool wake_ci
= false;
3433 bool wake_mdsc
= false;
3435 dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n",
3436 inode
, ci
, session
->s_mds
, follows
);
3438 spin_lock(&ci
->i_ceph_lock
);
3439 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
3440 if (capsnap
->follows
== follows
) {
3441 if (capsnap
->cap_flush
.tid
!= flush_tid
) {
3442 dout(" cap_snap %p follows %lld tid %lld !="
3443 " %lld\n", capsnap
, follows
,
3444 flush_tid
, capsnap
->cap_flush
.tid
);
3450 dout(" skipping cap_snap %p follows %lld\n",
3451 capsnap
, capsnap
->follows
);
3455 WARN_ON(capsnap
->dirty_pages
|| capsnap
->writing
);
3456 dout(" removing %p cap_snap %p follows %lld\n",
3457 inode
, capsnap
, follows
);
3458 list_del(&capsnap
->ci_item
);
3459 if (__finish_cap_flush(NULL
, ci
, &capsnap
->cap_flush
))
3462 spin_lock(&mdsc
->cap_dirty_lock
);
3464 if (list_empty(&ci
->i_cap_flush_list
))
3465 list_del_init(&ci
->i_flushing_item
);
3467 if (__finish_cap_flush(mdsc
, NULL
, &capsnap
->cap_flush
))
3470 spin_unlock(&mdsc
->cap_dirty_lock
);
3472 spin_unlock(&ci
->i_ceph_lock
);
3474 ceph_put_snap_context(capsnap
->context
);
3475 ceph_put_cap_snap(capsnap
);
3477 wake_up_all(&ci
->i_cap_wq
);
3479 wake_up_all(&mdsc
->cap_flushing_wq
);
3485 * Handle TRUNC from MDS, indicating file truncation.
3487 * caller hold s_mutex.
3489 static void handle_cap_trunc(struct inode
*inode
,
3490 struct ceph_mds_caps
*trunc
,
3491 struct ceph_mds_session
*session
)
3492 __releases(ci
->i_ceph_lock
)
3494 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3495 int mds
= session
->s_mds
;
3496 int seq
= le32_to_cpu(trunc
->seq
);
3497 u32 truncate_seq
= le32_to_cpu(trunc
->truncate_seq
);
3498 u64 truncate_size
= le64_to_cpu(trunc
->truncate_size
);
3499 u64 size
= le64_to_cpu(trunc
->size
);
3500 int implemented
= 0;
3501 int dirty
= __ceph_caps_dirty(ci
);
3502 int issued
= __ceph_caps_issued(ceph_inode(inode
), &implemented
);
3503 int queue_trunc
= 0;
3505 issued
|= implemented
| dirty
;
3507 dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n",
3508 inode
, mds
, seq
, truncate_size
, truncate_seq
);
3509 queue_trunc
= ceph_fill_file_size(inode
, issued
,
3510 truncate_seq
, truncate_size
, size
);
3511 spin_unlock(&ci
->i_ceph_lock
);
3514 ceph_queue_vmtruncate(inode
);
3518 * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a
3519 * different one. If we are the most recent migration we've seen (as
3520 * indicated by mseq), make note of the migrating cap bits for the
3521 * duration (until we see the corresponding IMPORT).
3523 * caller holds s_mutex
3525 static void handle_cap_export(struct inode
*inode
, struct ceph_mds_caps
*ex
,
3526 struct ceph_mds_cap_peer
*ph
,
3527 struct ceph_mds_session
*session
)
3529 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
3530 struct ceph_mds_session
*tsession
= NULL
;
3531 struct ceph_cap
*cap
, *tcap
, *new_cap
= NULL
;
3532 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3534 unsigned mseq
= le32_to_cpu(ex
->migrate_seq
);
3535 unsigned t_seq
, t_mseq
;
3537 int mds
= session
->s_mds
;
3540 t_cap_id
= le64_to_cpu(ph
->cap_id
);
3541 t_seq
= le32_to_cpu(ph
->seq
);
3542 t_mseq
= le32_to_cpu(ph
->mseq
);
3543 target
= le32_to_cpu(ph
->mds
);
3545 t_cap_id
= t_seq
= t_mseq
= 0;
3549 dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n",
3550 inode
, ci
, mds
, mseq
, target
);
3552 spin_lock(&ci
->i_ceph_lock
);
3553 cap
= __get_cap_for_mds(ci
, mds
);
3554 if (!cap
|| cap
->cap_id
!= le64_to_cpu(ex
->cap_id
))
3558 if (cap
->mds_wanted
| cap
->issued
)
3559 ci
->i_ceph_flags
|= CEPH_I_CAP_DROPPED
;
3560 __ceph_remove_cap(cap
, false);
3565 * now we know we haven't received the cap import message yet
3566 * because the exported cap still exist.
3569 issued
= cap
->issued
;
3570 if (issued
!= cap
->implemented
)
3571 pr_err_ratelimited("handle_cap_export: issued != implemented: "
3572 "ino (%llx.%llx) mds%d seq %d mseq %d "
3573 "issued %s implemented %s\n",
3574 ceph_vinop(inode
), mds
, cap
->seq
, cap
->mseq
,
3575 ceph_cap_string(issued
),
3576 ceph_cap_string(cap
->implemented
));
3579 tcap
= __get_cap_for_mds(ci
, target
);
3581 /* already have caps from the target */
3582 if (tcap
->cap_id
== t_cap_id
&&
3583 ceph_seq_cmp(tcap
->seq
, t_seq
) < 0) {
3584 dout(" updating import cap %p mds%d\n", tcap
, target
);
3585 tcap
->cap_id
= t_cap_id
;
3586 tcap
->seq
= t_seq
- 1;
3587 tcap
->issue_seq
= t_seq
- 1;
3588 tcap
->issued
|= issued
;
3589 tcap
->implemented
|= issued
;
3590 if (cap
== ci
->i_auth_cap
)
3591 ci
->i_auth_cap
= tcap
;
3593 if (!list_empty(&ci
->i_cap_flush_list
) &&
3594 ci
->i_auth_cap
== tcap
) {
3595 spin_lock(&mdsc
->cap_dirty_lock
);
3596 list_move_tail(&ci
->i_flushing_item
,
3597 &tcap
->session
->s_cap_flushing
);
3598 spin_unlock(&mdsc
->cap_dirty_lock
);
3601 __ceph_remove_cap(cap
, false);
3603 } else if (tsession
) {
3604 /* add placeholder for the export tagert */
3605 int flag
= (cap
== ci
->i_auth_cap
) ? CEPH_CAP_FLAG_AUTH
: 0;
3607 ceph_add_cap(inode
, tsession
, t_cap_id
, -1, issued
, 0,
3608 t_seq
- 1, t_mseq
, (u64
)-1, flag
, &new_cap
);
3610 if (!list_empty(&ci
->i_cap_flush_list
) &&
3611 ci
->i_auth_cap
== tcap
) {
3612 spin_lock(&mdsc
->cap_dirty_lock
);
3613 list_move_tail(&ci
->i_flushing_item
,
3614 &tcap
->session
->s_cap_flushing
);
3615 spin_unlock(&mdsc
->cap_dirty_lock
);
3618 __ceph_remove_cap(cap
, false);
3622 spin_unlock(&ci
->i_ceph_lock
);
3623 mutex_unlock(&session
->s_mutex
);
3625 /* open target session */
3626 tsession
= ceph_mdsc_open_export_target_session(mdsc
, target
);
3627 if (!IS_ERR(tsession
)) {
3629 mutex_lock(&session
->s_mutex
);
3630 mutex_lock_nested(&tsession
->s_mutex
,
3631 SINGLE_DEPTH_NESTING
);
3633 mutex_lock(&tsession
->s_mutex
);
3634 mutex_lock_nested(&session
->s_mutex
,
3635 SINGLE_DEPTH_NESTING
);
3637 new_cap
= ceph_get_cap(mdsc
, NULL
);
3646 spin_unlock(&ci
->i_ceph_lock
);
3647 mutex_unlock(&session
->s_mutex
);
3649 mutex_unlock(&tsession
->s_mutex
);
3650 ceph_put_mds_session(tsession
);
3653 ceph_put_cap(mdsc
, new_cap
);
3657 * Handle cap IMPORT.
3659 * caller holds s_mutex. acquires i_ceph_lock
3661 static void handle_cap_import(struct ceph_mds_client
*mdsc
,
3662 struct inode
*inode
, struct ceph_mds_caps
*im
,
3663 struct ceph_mds_cap_peer
*ph
,
3664 struct ceph_mds_session
*session
,
3665 struct ceph_cap
**target_cap
, int *old_issued
)
3666 __acquires(ci
->i_ceph_lock
)
3668 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3669 struct ceph_cap
*cap
, *ocap
, *new_cap
= NULL
;
3670 int mds
= session
->s_mds
;
3672 unsigned caps
= le32_to_cpu(im
->caps
);
3673 unsigned wanted
= le32_to_cpu(im
->wanted
);
3674 unsigned seq
= le32_to_cpu(im
->seq
);
3675 unsigned mseq
= le32_to_cpu(im
->migrate_seq
);
3676 u64 realmino
= le64_to_cpu(im
->realm
);
3677 u64 cap_id
= le64_to_cpu(im
->cap_id
);
3682 p_cap_id
= le64_to_cpu(ph
->cap_id
);
3683 peer
= le32_to_cpu(ph
->mds
);
3689 dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n",
3690 inode
, ci
, mds
, mseq
, peer
);
3693 spin_lock(&ci
->i_ceph_lock
);
3694 cap
= __get_cap_for_mds(ci
, mds
);
3697 spin_unlock(&ci
->i_ceph_lock
);
3698 new_cap
= ceph_get_cap(mdsc
, NULL
);
3704 ceph_put_cap(mdsc
, new_cap
);
3709 __ceph_caps_issued(ci
, &issued
);
3710 issued
|= __ceph_caps_dirty(ci
);
3712 ceph_add_cap(inode
, session
, cap_id
, -1, caps
, wanted
, seq
, mseq
,
3713 realmino
, CEPH_CAP_FLAG_AUTH
, &new_cap
);
3715 ocap
= peer
>= 0 ? __get_cap_for_mds(ci
, peer
) : NULL
;
3716 if (ocap
&& ocap
->cap_id
== p_cap_id
) {
3717 dout(" remove export cap %p mds%d flags %d\n",
3718 ocap
, peer
, ph
->flags
);
3719 if ((ph
->flags
& CEPH_CAP_FLAG_AUTH
) &&
3720 (ocap
->seq
!= le32_to_cpu(ph
->seq
) ||
3721 ocap
->mseq
!= le32_to_cpu(ph
->mseq
))) {
3722 pr_err_ratelimited("handle_cap_import: "
3723 "mismatched seq/mseq: ino (%llx.%llx) "
3724 "mds%d seq %d mseq %d importer mds%d "
3725 "has peer seq %d mseq %d\n",
3726 ceph_vinop(inode
), peer
, ocap
->seq
,
3727 ocap
->mseq
, mds
, le32_to_cpu(ph
->seq
),
3728 le32_to_cpu(ph
->mseq
));
3730 __ceph_remove_cap(ocap
, (ph
->flags
& CEPH_CAP_FLAG_RELEASE
));
3733 /* make sure we re-request max_size, if necessary */
3734 ci
->i_requested_max_size
= 0;
3736 *old_issued
= issued
;
3741 * Handle a caps message from the MDS.
3743 * Identify the appropriate session, inode, and call the right handler
3744 * based on the cap op.
3746 void ceph_handle_caps(struct ceph_mds_session
*session
,
3747 struct ceph_msg
*msg
)
3749 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
3750 struct inode
*inode
;
3751 struct ceph_inode_info
*ci
;
3752 struct ceph_cap
*cap
;
3753 struct ceph_mds_caps
*h
;
3754 struct ceph_mds_cap_peer
*peer
= NULL
;
3755 struct ceph_snap_realm
*realm
= NULL
;
3757 int msg_version
= le16_to_cpu(msg
->hdr
.version
);
3759 struct ceph_vino vino
;
3761 size_t snaptrace_len
;
3763 struct cap_extra_info extra_info
= {};
3765 dout("handle_caps from mds%d\n", session
->s_mds
);
3768 end
= msg
->front
.iov_base
+ msg
->front
.iov_len
;
3769 if (msg
->front
.iov_len
< sizeof(*h
))
3771 h
= msg
->front
.iov_base
;
3772 op
= le32_to_cpu(h
->op
);
3773 vino
.ino
= le64_to_cpu(h
->ino
);
3774 vino
.snap
= CEPH_NOSNAP
;
3775 seq
= le32_to_cpu(h
->seq
);
3776 mseq
= le32_to_cpu(h
->migrate_seq
);
3779 snaptrace_len
= le32_to_cpu(h
->snap_trace_len
);
3780 p
= snaptrace
+ snaptrace_len
;
3782 if (msg_version
>= 2) {
3784 ceph_decode_32_safe(&p
, end
, flock_len
, bad
);
3785 if (p
+ flock_len
> end
)
3790 if (msg_version
>= 3) {
3791 if (op
== CEPH_CAP_OP_IMPORT
) {
3792 if (p
+ sizeof(*peer
) > end
)
3796 } else if (op
== CEPH_CAP_OP_EXPORT
) {
3797 /* recorded in unused fields */
3798 peer
= (void *)&h
->size
;
3802 if (msg_version
>= 4) {
3803 ceph_decode_64_safe(&p
, end
, extra_info
.inline_version
, bad
);
3804 ceph_decode_32_safe(&p
, end
, extra_info
.inline_len
, bad
);
3805 if (p
+ extra_info
.inline_len
> end
)
3807 extra_info
.inline_data
= p
;
3808 p
+= extra_info
.inline_len
;
3811 if (msg_version
>= 5) {
3812 struct ceph_osd_client
*osdc
= &mdsc
->fsc
->client
->osdc
;
3815 ceph_decode_32_safe(&p
, end
, epoch_barrier
, bad
);
3816 ceph_osdc_update_epoch_barrier(osdc
, epoch_barrier
);
3819 if (msg_version
>= 8) {
3821 u32 caller_uid
, caller_gid
;
3825 ceph_decode_64_safe(&p
, end
, flush_tid
, bad
);
3827 ceph_decode_32_safe(&p
, end
, caller_uid
, bad
);
3828 ceph_decode_32_safe(&p
, end
, caller_gid
, bad
);
3830 ceph_decode_32_safe(&p
, end
, pool_ns_len
, bad
);
3831 if (pool_ns_len
> 0) {
3832 ceph_decode_need(&p
, end
, pool_ns_len
, bad
);
3833 extra_info
.pool_ns
=
3834 ceph_find_or_create_string(p
, pool_ns_len
);
3839 if (msg_version
>= 11) {
3840 struct ceph_timespec
*btime
;
3845 if (p
+ sizeof(*btime
) > end
)
3848 p
+= sizeof(*btime
);
3849 ceph_decode_64_safe(&p
, end
, change_attr
, bad
);
3851 ceph_decode_32_safe(&p
, end
, flags
, bad
);
3853 extra_info
.dirstat_valid
= true;
3854 ceph_decode_64_safe(&p
, end
, extra_info
.nfiles
, bad
);
3855 ceph_decode_64_safe(&p
, end
, extra_info
.nsubdirs
, bad
);
3859 inode
= ceph_find_inode(mdsc
->fsc
->sb
, vino
);
3860 ci
= ceph_inode(inode
);
3861 dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op
), vino
.ino
,
3864 mutex_lock(&session
->s_mutex
);
3866 dout(" mds%d seq %lld cap seq %u\n", session
->s_mds
, session
->s_seq
,
3870 dout(" i don't have ino %llx\n", vino
.ino
);
3872 if (op
== CEPH_CAP_OP_IMPORT
) {
3873 cap
= ceph_get_cap(mdsc
, NULL
);
3874 cap
->cap_ino
= vino
.ino
;
3875 cap
->queue_release
= 1;
3876 cap
->cap_id
= le64_to_cpu(h
->cap_id
);
3879 cap
->issue_seq
= seq
;
3880 spin_lock(&session
->s_cap_lock
);
3881 list_add_tail(&cap
->session_caps
,
3882 &session
->s_cap_releases
);
3883 session
->s_num_cap_releases
++;
3884 spin_unlock(&session
->s_cap_lock
);
3886 goto flush_cap_releases
;
3889 /* these will work even if we don't have a cap yet */
3891 case CEPH_CAP_OP_FLUSHSNAP_ACK
:
3892 handle_cap_flushsnap_ack(inode
, le64_to_cpu(msg
->hdr
.tid
),
3896 case CEPH_CAP_OP_EXPORT
:
3897 handle_cap_export(inode
, h
, peer
, session
);
3900 case CEPH_CAP_OP_IMPORT
:
3902 if (snaptrace_len
) {
3903 down_write(&mdsc
->snap_rwsem
);
3904 ceph_update_snap_trace(mdsc
, snaptrace
,
3905 snaptrace
+ snaptrace_len
,
3907 downgrade_write(&mdsc
->snap_rwsem
);
3909 down_read(&mdsc
->snap_rwsem
);
3911 handle_cap_import(mdsc
, inode
, h
, peer
, session
,
3912 &cap
, &extra_info
.issued
);
3913 handle_cap_grant(inode
, session
, cap
,
3914 h
, msg
->middle
, &extra_info
);
3916 ceph_put_snap_realm(mdsc
, realm
);
3920 /* the rest require a cap */
3921 spin_lock(&ci
->i_ceph_lock
);
3922 cap
= __get_cap_for_mds(ceph_inode(inode
), session
->s_mds
);
3924 dout(" no cap on %p ino %llx.%llx from mds%d\n",
3925 inode
, ceph_ino(inode
), ceph_snap(inode
),
3927 spin_unlock(&ci
->i_ceph_lock
);
3928 goto flush_cap_releases
;
3931 /* note that each of these drops i_ceph_lock for us */
3933 case CEPH_CAP_OP_REVOKE
:
3934 case CEPH_CAP_OP_GRANT
:
3935 __ceph_caps_issued(ci
, &extra_info
.issued
);
3936 extra_info
.issued
|= __ceph_caps_dirty(ci
);
3937 handle_cap_grant(inode
, session
, cap
,
3938 h
, msg
->middle
, &extra_info
);
3941 case CEPH_CAP_OP_FLUSH_ACK
:
3942 handle_cap_flush_ack(inode
, le64_to_cpu(msg
->hdr
.tid
),
3946 case CEPH_CAP_OP_TRUNC
:
3947 handle_cap_trunc(inode
, h
, session
);
3951 spin_unlock(&ci
->i_ceph_lock
);
3952 pr_err("ceph_handle_caps: unknown cap op %d %s\n", op
,
3953 ceph_cap_op_name(op
));
3960 * send any cap release message to try to move things
3961 * along for the mds (who clearly thinks we still have this
3964 ceph_send_cap_releases(mdsc
, session
);
3967 mutex_unlock(&session
->s_mutex
);
3970 ceph_put_string(extra_info
.pool_ns
);
3974 pr_err("ceph_handle_caps: corrupt message\n");
3980 * Delayed work handler to process end of delayed cap release LRU list.
3982 void ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
)
3984 struct inode
*inode
;
3985 struct ceph_inode_info
*ci
;
3986 int flags
= CHECK_CAPS_NODELAY
;
3988 dout("check_delayed_caps\n");
3990 spin_lock(&mdsc
->cap_delay_lock
);
3991 if (list_empty(&mdsc
->cap_delay_list
))
3993 ci
= list_first_entry(&mdsc
->cap_delay_list
,
3994 struct ceph_inode_info
,
3996 if ((ci
->i_ceph_flags
& CEPH_I_FLUSH
) == 0 &&
3997 time_before(jiffies
, ci
->i_hold_caps_max
))
3999 list_del_init(&ci
->i_cap_delay_list
);
4001 inode
= igrab(&ci
->vfs_inode
);
4002 spin_unlock(&mdsc
->cap_delay_lock
);
4005 dout("check_delayed_caps on %p\n", inode
);
4006 ceph_check_caps(ci
, flags
, NULL
);
4010 spin_unlock(&mdsc
->cap_delay_lock
);
4014 * Flush all dirty caps to the mds
4016 void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
)
4018 struct ceph_inode_info
*ci
;
4019 struct inode
*inode
;
4021 dout("flush_dirty_caps\n");
4022 spin_lock(&mdsc
->cap_dirty_lock
);
4023 while (!list_empty(&mdsc
->cap_dirty
)) {
4024 ci
= list_first_entry(&mdsc
->cap_dirty
, struct ceph_inode_info
,
4026 inode
= &ci
->vfs_inode
;
4028 dout("flush_dirty_caps %p\n", inode
);
4029 spin_unlock(&mdsc
->cap_dirty_lock
);
4030 ceph_check_caps(ci
, CHECK_CAPS_NODELAY
|CHECK_CAPS_FLUSH
, NULL
);
4032 spin_lock(&mdsc
->cap_dirty_lock
);
4034 spin_unlock(&mdsc
->cap_dirty_lock
);
4035 dout("flush_dirty_caps done\n");
4038 void __ceph_get_fmode(struct ceph_inode_info
*ci
, int fmode
)
4041 int bits
= (fmode
<< 1) | 1;
4042 for (i
= 0; i
< CEPH_FILE_MODE_BITS
; i
++) {
4043 if (bits
& (1 << i
))
4044 ci
->i_nr_by_mode
[i
]++;
4049 * Drop open file reference. If we were the last open file,
4050 * we may need to release capabilities to the MDS (or schedule
4051 * their delayed release).
4053 void ceph_put_fmode(struct ceph_inode_info
*ci
, int fmode
)
4056 int bits
= (fmode
<< 1) | 1;
4057 spin_lock(&ci
->i_ceph_lock
);
4058 for (i
= 0; i
< CEPH_FILE_MODE_BITS
; i
++) {
4059 if (bits
& (1 << i
)) {
4060 BUG_ON(ci
->i_nr_by_mode
[i
] == 0);
4061 if (--ci
->i_nr_by_mode
[i
] == 0)
4065 dout("put_fmode %p fmode %d {%d,%d,%d,%d}\n",
4066 &ci
->vfs_inode
, fmode
,
4067 ci
->i_nr_by_mode
[0], ci
->i_nr_by_mode
[1],
4068 ci
->i_nr_by_mode
[2], ci
->i_nr_by_mode
[3]);
4069 spin_unlock(&ci
->i_ceph_lock
);
4071 if (last
&& ci
->i_vino
.snap
== CEPH_NOSNAP
)
4072 ceph_check_caps(ci
, 0, NULL
);
4076 * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it
4077 * looks like the link count will hit 0, drop any other caps (other
4078 * than PIN) we don't specifically want (due to the file still being
4081 int ceph_drop_caps_for_unlink(struct inode
*inode
)
4083 struct ceph_inode_info
*ci
= ceph_inode(inode
);
4084 int drop
= CEPH_CAP_LINK_SHARED
| CEPH_CAP_LINK_EXCL
;
4086 spin_lock(&ci
->i_ceph_lock
);
4087 if (inode
->i_nlink
== 1) {
4088 drop
|= ~(__ceph_caps_wanted(ci
) | CEPH_CAP_PIN
);
4090 ci
->i_ceph_flags
|= CEPH_I_NODELAY
;
4091 if (__ceph_caps_dirty(ci
)) {
4092 struct ceph_mds_client
*mdsc
=
4093 ceph_inode_to_client(inode
)->mdsc
;
4094 __cap_delay_requeue_front(mdsc
, ci
);
4097 spin_unlock(&ci
->i_ceph_lock
);
4102 * Helpers for embedding cap and dentry lease releases into mds
4105 * @force is used by dentry_release (below) to force inclusion of a
4106 * record for the directory inode, even when there aren't any caps to
4109 int ceph_encode_inode_release(void **p
, struct inode
*inode
,
4110 int mds
, int drop
, int unless
, int force
)
4112 struct ceph_inode_info
*ci
= ceph_inode(inode
);
4113 struct ceph_cap
*cap
;
4114 struct ceph_mds_request_release
*rel
= *p
;
4118 spin_lock(&ci
->i_ceph_lock
);
4119 used
= __ceph_caps_used(ci
);
4120 dirty
= __ceph_caps_dirty(ci
);
4122 dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n",
4123 inode
, mds
, ceph_cap_string(used
|dirty
), ceph_cap_string(drop
),
4124 ceph_cap_string(unless
));
4126 /* only drop unused, clean caps */
4127 drop
&= ~(used
| dirty
);
4129 cap
= __get_cap_for_mds(ci
, mds
);
4130 if (cap
&& __cap_is_valid(cap
)) {
4131 unless
&= cap
->issued
;
4133 if (unless
& CEPH_CAP_AUTH_EXCL
)
4134 drop
&= ~CEPH_CAP_AUTH_SHARED
;
4135 if (unless
& CEPH_CAP_LINK_EXCL
)
4136 drop
&= ~CEPH_CAP_LINK_SHARED
;
4137 if (unless
& CEPH_CAP_XATTR_EXCL
)
4138 drop
&= ~CEPH_CAP_XATTR_SHARED
;
4139 if (unless
& CEPH_CAP_FILE_EXCL
)
4140 drop
&= ~CEPH_CAP_FILE_SHARED
;
4143 if (force
|| (cap
->issued
& drop
)) {
4144 if (cap
->issued
& drop
) {
4145 int wanted
= __ceph_caps_wanted(ci
);
4146 if ((ci
->i_ceph_flags
& CEPH_I_NODELAY
) == 0)
4147 wanted
|= cap
->mds_wanted
;
4148 dout("encode_inode_release %p cap %p "
4149 "%s -> %s, wanted %s -> %s\n", inode
, cap
,
4150 ceph_cap_string(cap
->issued
),
4151 ceph_cap_string(cap
->issued
& ~drop
),
4152 ceph_cap_string(cap
->mds_wanted
),
4153 ceph_cap_string(wanted
));
4155 cap
->issued
&= ~drop
;
4156 cap
->implemented
&= ~drop
;
4157 cap
->mds_wanted
= wanted
;
4159 dout("encode_inode_release %p cap %p %s"
4160 " (force)\n", inode
, cap
,
4161 ceph_cap_string(cap
->issued
));
4164 rel
->ino
= cpu_to_le64(ceph_ino(inode
));
4165 rel
->cap_id
= cpu_to_le64(cap
->cap_id
);
4166 rel
->seq
= cpu_to_le32(cap
->seq
);
4167 rel
->issue_seq
= cpu_to_le32(cap
->issue_seq
);
4168 rel
->mseq
= cpu_to_le32(cap
->mseq
);
4169 rel
->caps
= cpu_to_le32(cap
->implemented
);
4170 rel
->wanted
= cpu_to_le32(cap
->mds_wanted
);
4176 dout("encode_inode_release %p cap %p %s (noop)\n",
4177 inode
, cap
, ceph_cap_string(cap
->issued
));
4180 spin_unlock(&ci
->i_ceph_lock
);
4184 int ceph_encode_dentry_release(void **p
, struct dentry
*dentry
,
4186 int mds
, int drop
, int unless
)
4188 struct dentry
*parent
= NULL
;
4189 struct ceph_mds_request_release
*rel
= *p
;
4190 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
4195 * force an record for the directory caps if we have a dentry lease.
4196 * this is racy (can't take i_ceph_lock and d_lock together), but it
4197 * doesn't have to be perfect; the mds will revoke anything we don't
4200 spin_lock(&dentry
->d_lock
);
4201 if (di
->lease_session
&& di
->lease_session
->s_mds
== mds
)
4204 parent
= dget(dentry
->d_parent
);
4205 dir
= d_inode(parent
);
4207 spin_unlock(&dentry
->d_lock
);
4209 ret
= ceph_encode_inode_release(p
, dir
, mds
, drop
, unless
, force
);
4212 spin_lock(&dentry
->d_lock
);
4213 if (ret
&& di
->lease_session
&& di
->lease_session
->s_mds
== mds
) {
4214 dout("encode_dentry_release %p mds%d seq %d\n",
4215 dentry
, mds
, (int)di
->lease_seq
);
4216 rel
->dname_len
= cpu_to_le32(dentry
->d_name
.len
);
4217 memcpy(*p
, dentry
->d_name
.name
, dentry
->d_name
.len
);
4218 *p
+= dentry
->d_name
.len
;
4219 rel
->dname_seq
= cpu_to_le32(di
->lease_seq
);
4220 __ceph_mdsc_drop_dentry_lease(dentry
);
4222 spin_unlock(&dentry
->d_lock
);