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>
11 #include <linux/iversion.h>
14 #include "mds_client.h"
16 #include <linux/ceph/decode.h>
17 #include <linux/ceph/messenger.h>
20 * Capability management
22 * The Ceph metadata servers control client access to inode metadata
23 * and file data by issuing capabilities, granting clients permission
24 * to read and/or write both inode field and file data to OSDs
25 * (storage nodes). Each capability consists of a set of bits
26 * indicating which operations are allowed.
28 * If the client holds a *_SHARED cap, the client has a coherent value
29 * that can be safely read from the cached inode.
31 * In the case of a *_EXCL (exclusive) or FILE_WR capabilities, the
32 * client is allowed to change inode attributes (e.g., file size,
33 * mtime), note its dirty state in the ceph_cap, and asynchronously
34 * flush that metadata change to the MDS.
36 * In the event of a conflicting operation (perhaps by another
37 * client), the MDS will revoke the conflicting client capabilities.
39 * In order for a client to cache an inode, it must hold a capability
40 * with at least one MDS server. When inodes are released, release
41 * notifications are batched and periodically sent en masse to the MDS
42 * cluster to release server state.
45 static u64
__get_oldest_flush_tid(struct ceph_mds_client
*mdsc
);
46 static void __kick_flushing_caps(struct ceph_mds_client
*mdsc
,
47 struct ceph_mds_session
*session
,
48 struct ceph_inode_info
*ci
,
49 u64 oldest_flush_tid
);
52 * Generate readable cap strings for debugging output.
54 #define MAX_CAP_STR 20
55 static char cap_str
[MAX_CAP_STR
][40];
56 static DEFINE_SPINLOCK(cap_str_lock
);
57 static int last_cap_str
;
59 static char *gcap_string(char *s
, int c
)
61 if (c
& CEPH_CAP_GSHARED
)
63 if (c
& CEPH_CAP_GEXCL
)
65 if (c
& CEPH_CAP_GCACHE
)
71 if (c
& CEPH_CAP_GBUFFER
)
73 if (c
& CEPH_CAP_GWREXTEND
)
75 if (c
& CEPH_CAP_GLAZYIO
)
80 const char *ceph_cap_string(int caps
)
86 spin_lock(&cap_str_lock
);
88 if (last_cap_str
== MAX_CAP_STR
)
90 spin_unlock(&cap_str_lock
);
94 if (caps
& CEPH_CAP_PIN
)
97 c
= (caps
>> CEPH_CAP_SAUTH
) & 3;
100 s
= gcap_string(s
, c
);
103 c
= (caps
>> CEPH_CAP_SLINK
) & 3;
106 s
= gcap_string(s
, c
);
109 c
= (caps
>> CEPH_CAP_SXATTR
) & 3;
112 s
= gcap_string(s
, c
);
115 c
= caps
>> CEPH_CAP_SFILE
;
118 s
= gcap_string(s
, c
);
127 void ceph_caps_init(struct ceph_mds_client
*mdsc
)
129 INIT_LIST_HEAD(&mdsc
->caps_list
);
130 spin_lock_init(&mdsc
->caps_list_lock
);
133 void ceph_caps_finalize(struct ceph_mds_client
*mdsc
)
135 struct ceph_cap
*cap
;
137 spin_lock(&mdsc
->caps_list_lock
);
138 while (!list_empty(&mdsc
->caps_list
)) {
139 cap
= list_first_entry(&mdsc
->caps_list
,
140 struct ceph_cap
, caps_item
);
141 list_del(&cap
->caps_item
);
142 kmem_cache_free(ceph_cap_cachep
, cap
);
144 mdsc
->caps_total_count
= 0;
145 mdsc
->caps_avail_count
= 0;
146 mdsc
->caps_use_count
= 0;
147 mdsc
->caps_reserve_count
= 0;
148 mdsc
->caps_min_count
= 0;
149 spin_unlock(&mdsc
->caps_list_lock
);
152 void ceph_adjust_caps_max_min(struct ceph_mds_client
*mdsc
,
153 struct ceph_mount_options
*fsopt
)
155 spin_lock(&mdsc
->caps_list_lock
);
156 mdsc
->caps_min_count
= fsopt
->max_readdir
;
157 if (mdsc
->caps_min_count
< 1024)
158 mdsc
->caps_min_count
= 1024;
159 mdsc
->caps_use_max
= fsopt
->caps_max
;
160 if (mdsc
->caps_use_max
> 0 &&
161 mdsc
->caps_use_max
< mdsc
->caps_min_count
)
162 mdsc
->caps_use_max
= mdsc
->caps_min_count
;
163 spin_unlock(&mdsc
->caps_list_lock
);
166 static void __ceph_unreserve_caps(struct ceph_mds_client
*mdsc
, int nr_caps
)
168 struct ceph_cap
*cap
;
172 BUG_ON(mdsc
->caps_reserve_count
< nr_caps
);
173 mdsc
->caps_reserve_count
-= nr_caps
;
174 if (mdsc
->caps_avail_count
>=
175 mdsc
->caps_reserve_count
+ mdsc
->caps_min_count
) {
176 mdsc
->caps_total_count
-= nr_caps
;
177 for (i
= 0; i
< nr_caps
; i
++) {
178 cap
= list_first_entry(&mdsc
->caps_list
,
179 struct ceph_cap
, caps_item
);
180 list_del(&cap
->caps_item
);
181 kmem_cache_free(ceph_cap_cachep
, cap
);
184 mdsc
->caps_avail_count
+= nr_caps
;
187 dout("%s: caps %d = %d used + %d resv + %d avail\n",
189 mdsc
->caps_total_count
, mdsc
->caps_use_count
,
190 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
191 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
192 mdsc
->caps_reserve_count
+
193 mdsc
->caps_avail_count
);
198 * Called under mdsc->mutex.
200 int ceph_reserve_caps(struct ceph_mds_client
*mdsc
,
201 struct ceph_cap_reservation
*ctx
, int need
)
204 struct ceph_cap
*cap
;
209 bool trimmed
= false;
210 struct ceph_mds_session
*s
;
213 dout("reserve caps ctx=%p need=%d\n", ctx
, need
);
215 /* first reserve any caps that are already allocated */
216 spin_lock(&mdsc
->caps_list_lock
);
217 if (mdsc
->caps_avail_count
>= need
)
220 have
= mdsc
->caps_avail_count
;
221 mdsc
->caps_avail_count
-= have
;
222 mdsc
->caps_reserve_count
+= have
;
223 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
224 mdsc
->caps_reserve_count
+
225 mdsc
->caps_avail_count
);
226 spin_unlock(&mdsc
->caps_list_lock
);
228 for (i
= have
; i
< need
; ) {
229 cap
= kmem_cache_alloc(ceph_cap_cachep
, GFP_NOFS
);
231 list_add(&cap
->caps_item
, &newcaps
);
238 for (j
= 0; j
< mdsc
->max_sessions
; j
++) {
239 s
= __ceph_lookup_mds_session(mdsc
, j
);
242 mutex_unlock(&mdsc
->mutex
);
244 mutex_lock(&s
->s_mutex
);
245 max_caps
= s
->s_nr_caps
- (need
- i
);
246 ceph_trim_caps(mdsc
, s
, max_caps
);
247 mutex_unlock(&s
->s_mutex
);
249 ceph_put_mds_session(s
);
250 mutex_lock(&mdsc
->mutex
);
254 spin_lock(&mdsc
->caps_list_lock
);
255 if (mdsc
->caps_avail_count
) {
257 if (mdsc
->caps_avail_count
>= need
- i
)
258 more_have
= need
- i
;
260 more_have
= mdsc
->caps_avail_count
;
264 mdsc
->caps_avail_count
-= more_have
;
265 mdsc
->caps_reserve_count
+= more_have
;
268 spin_unlock(&mdsc
->caps_list_lock
);
273 pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n",
274 ctx
, need
, have
+ alloc
);
280 BUG_ON(have
+ alloc
!= need
);
285 spin_lock(&mdsc
->caps_list_lock
);
286 mdsc
->caps_total_count
+= alloc
;
287 mdsc
->caps_reserve_count
+= alloc
;
288 list_splice(&newcaps
, &mdsc
->caps_list
);
290 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
291 mdsc
->caps_reserve_count
+
292 mdsc
->caps_avail_count
);
295 __ceph_unreserve_caps(mdsc
, have
+ alloc
);
297 spin_unlock(&mdsc
->caps_list_lock
);
299 dout("reserve caps ctx=%p %d = %d used + %d resv + %d avail\n",
300 ctx
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
301 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
305 void ceph_unreserve_caps(struct ceph_mds_client
*mdsc
,
306 struct ceph_cap_reservation
*ctx
)
308 bool reclaim
= false;
312 dout("unreserve caps ctx=%p count=%d\n", ctx
, ctx
->count
);
313 spin_lock(&mdsc
->caps_list_lock
);
314 __ceph_unreserve_caps(mdsc
, ctx
->count
);
317 if (mdsc
->caps_use_max
> 0 &&
318 mdsc
->caps_use_count
> mdsc
->caps_use_max
)
320 spin_unlock(&mdsc
->caps_list_lock
);
323 ceph_reclaim_caps_nr(mdsc
, ctx
->used
);
326 struct ceph_cap
*ceph_get_cap(struct ceph_mds_client
*mdsc
,
327 struct ceph_cap_reservation
*ctx
)
329 struct ceph_cap
*cap
= NULL
;
331 /* temporary, until we do something about cap import/export */
333 cap
= kmem_cache_alloc(ceph_cap_cachep
, GFP_NOFS
);
335 spin_lock(&mdsc
->caps_list_lock
);
336 mdsc
->caps_use_count
++;
337 mdsc
->caps_total_count
++;
338 spin_unlock(&mdsc
->caps_list_lock
);
340 spin_lock(&mdsc
->caps_list_lock
);
341 if (mdsc
->caps_avail_count
) {
342 BUG_ON(list_empty(&mdsc
->caps_list
));
344 mdsc
->caps_avail_count
--;
345 mdsc
->caps_use_count
++;
346 cap
= list_first_entry(&mdsc
->caps_list
,
347 struct ceph_cap
, caps_item
);
348 list_del(&cap
->caps_item
);
350 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
351 mdsc
->caps_reserve_count
+ mdsc
->caps_avail_count
);
353 spin_unlock(&mdsc
->caps_list_lock
);
359 spin_lock(&mdsc
->caps_list_lock
);
360 dout("get_cap ctx=%p (%d) %d = %d used + %d resv + %d avail\n",
361 ctx
, ctx
->count
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
362 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
364 BUG_ON(ctx
->count
> mdsc
->caps_reserve_count
);
365 BUG_ON(list_empty(&mdsc
->caps_list
));
369 mdsc
->caps_reserve_count
--;
370 mdsc
->caps_use_count
++;
372 cap
= list_first_entry(&mdsc
->caps_list
, struct ceph_cap
, caps_item
);
373 list_del(&cap
->caps_item
);
375 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
376 mdsc
->caps_reserve_count
+ mdsc
->caps_avail_count
);
377 spin_unlock(&mdsc
->caps_list_lock
);
381 void ceph_put_cap(struct ceph_mds_client
*mdsc
, struct ceph_cap
*cap
)
383 spin_lock(&mdsc
->caps_list_lock
);
384 dout("put_cap %p %d = %d used + %d resv + %d avail\n",
385 cap
, mdsc
->caps_total_count
, mdsc
->caps_use_count
,
386 mdsc
->caps_reserve_count
, mdsc
->caps_avail_count
);
387 mdsc
->caps_use_count
--;
389 * Keep some preallocated caps around (ceph_min_count), to
390 * avoid lots of free/alloc churn.
392 if (mdsc
->caps_avail_count
>= mdsc
->caps_reserve_count
+
393 mdsc
->caps_min_count
) {
394 mdsc
->caps_total_count
--;
395 kmem_cache_free(ceph_cap_cachep
, cap
);
397 mdsc
->caps_avail_count
++;
398 list_add(&cap
->caps_item
, &mdsc
->caps_list
);
401 BUG_ON(mdsc
->caps_total_count
!= mdsc
->caps_use_count
+
402 mdsc
->caps_reserve_count
+ mdsc
->caps_avail_count
);
403 spin_unlock(&mdsc
->caps_list_lock
);
406 void ceph_reservation_status(struct ceph_fs_client
*fsc
,
407 int *total
, int *avail
, int *used
, int *reserved
,
410 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
412 spin_lock(&mdsc
->caps_list_lock
);
415 *total
= mdsc
->caps_total_count
;
417 *avail
= mdsc
->caps_avail_count
;
419 *used
= mdsc
->caps_use_count
;
421 *reserved
= mdsc
->caps_reserve_count
;
423 *min
= mdsc
->caps_min_count
;
425 spin_unlock(&mdsc
->caps_list_lock
);
429 * Find ceph_cap for given mds, if any.
431 * Called with i_ceph_lock held.
433 static struct ceph_cap
*__get_cap_for_mds(struct ceph_inode_info
*ci
, int mds
)
435 struct ceph_cap
*cap
;
436 struct rb_node
*n
= ci
->i_caps
.rb_node
;
439 cap
= rb_entry(n
, struct ceph_cap
, ci_node
);
442 else if (mds
> cap
->mds
)
450 struct ceph_cap
*ceph_get_cap_for_mds(struct ceph_inode_info
*ci
, int mds
)
452 struct ceph_cap
*cap
;
454 spin_lock(&ci
->i_ceph_lock
);
455 cap
= __get_cap_for_mds(ci
, mds
);
456 spin_unlock(&ci
->i_ceph_lock
);
461 * Called under i_ceph_lock.
463 static void __insert_cap_node(struct ceph_inode_info
*ci
,
464 struct ceph_cap
*new)
466 struct rb_node
**p
= &ci
->i_caps
.rb_node
;
467 struct rb_node
*parent
= NULL
;
468 struct ceph_cap
*cap
= NULL
;
472 cap
= rb_entry(parent
, struct ceph_cap
, ci_node
);
473 if (new->mds
< cap
->mds
)
475 else if (new->mds
> cap
->mds
)
481 rb_link_node(&new->ci_node
, parent
, p
);
482 rb_insert_color(&new->ci_node
, &ci
->i_caps
);
486 * (re)set cap hold timeouts, which control the delayed release
487 * of unused caps back to the MDS. Should be called on cap use.
489 static void __cap_set_timeouts(struct ceph_mds_client
*mdsc
,
490 struct ceph_inode_info
*ci
)
492 struct ceph_mount_options
*opt
= mdsc
->fsc
->mount_options
;
493 ci
->i_hold_caps_max
= round_jiffies(jiffies
+
494 opt
->caps_wanted_delay_max
* HZ
);
495 dout("__cap_set_timeouts %p %lu\n", &ci
->vfs_inode
,
496 ci
->i_hold_caps_max
- jiffies
);
500 * (Re)queue cap at the end of the delayed cap release list.
502 * If I_FLUSH is set, leave the inode at the front of the list.
504 * Caller holds i_ceph_lock
505 * -> we take mdsc->cap_delay_lock
507 static void __cap_delay_requeue(struct ceph_mds_client
*mdsc
,
508 struct ceph_inode_info
*ci
)
510 dout("__cap_delay_requeue %p flags 0x%lx at %lu\n", &ci
->vfs_inode
,
511 ci
->i_ceph_flags
, ci
->i_hold_caps_max
);
512 if (!mdsc
->stopping
) {
513 spin_lock(&mdsc
->cap_delay_lock
);
514 if (!list_empty(&ci
->i_cap_delay_list
)) {
515 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
517 list_del_init(&ci
->i_cap_delay_list
);
519 __cap_set_timeouts(mdsc
, ci
);
520 list_add_tail(&ci
->i_cap_delay_list
, &mdsc
->cap_delay_list
);
522 spin_unlock(&mdsc
->cap_delay_lock
);
527 * Queue an inode for immediate writeback. Mark inode with I_FLUSH,
528 * indicating we should send a cap message to flush dirty metadata
529 * asap, and move to the front of the delayed cap list.
531 static void __cap_delay_requeue_front(struct ceph_mds_client
*mdsc
,
532 struct ceph_inode_info
*ci
)
534 dout("__cap_delay_requeue_front %p\n", &ci
->vfs_inode
);
535 spin_lock(&mdsc
->cap_delay_lock
);
536 ci
->i_ceph_flags
|= CEPH_I_FLUSH
;
537 if (!list_empty(&ci
->i_cap_delay_list
))
538 list_del_init(&ci
->i_cap_delay_list
);
539 list_add(&ci
->i_cap_delay_list
, &mdsc
->cap_delay_list
);
540 spin_unlock(&mdsc
->cap_delay_lock
);
544 * Cancel delayed work on cap.
546 * Caller must hold i_ceph_lock.
548 static void __cap_delay_cancel(struct ceph_mds_client
*mdsc
,
549 struct ceph_inode_info
*ci
)
551 dout("__cap_delay_cancel %p\n", &ci
->vfs_inode
);
552 if (list_empty(&ci
->i_cap_delay_list
))
554 spin_lock(&mdsc
->cap_delay_lock
);
555 list_del_init(&ci
->i_cap_delay_list
);
556 spin_unlock(&mdsc
->cap_delay_lock
);
559 /* Common issue checks for add_cap, handle_cap_grant. */
560 static void __check_cap_issue(struct ceph_inode_info
*ci
, struct ceph_cap
*cap
,
563 unsigned had
= __ceph_caps_issued(ci
, NULL
);
565 lockdep_assert_held(&ci
->i_ceph_lock
);
568 * Each time we receive FILE_CACHE anew, we increment
571 if (S_ISREG(ci
->vfs_inode
.i_mode
) &&
572 (issued
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) &&
573 (had
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) == 0) {
578 * If FILE_SHARED is newly issued, mark dir not complete. We don't
579 * know what happened to this directory while we didn't have the cap.
580 * If FILE_SHARED is being revoked, also mark dir not complete. It
581 * stops on-going cached readdir.
583 if ((issued
& CEPH_CAP_FILE_SHARED
) != (had
& CEPH_CAP_FILE_SHARED
)) {
584 if (issued
& CEPH_CAP_FILE_SHARED
)
585 atomic_inc(&ci
->i_shared_gen
);
586 if (S_ISDIR(ci
->vfs_inode
.i_mode
)) {
587 dout(" marking %p NOT complete\n", &ci
->vfs_inode
);
588 __ceph_dir_clear_complete(ci
);
592 /* Wipe saved layout if we're losing DIR_CREATE caps */
593 if (S_ISDIR(ci
->vfs_inode
.i_mode
) && (had
& CEPH_CAP_DIR_CREATE
) &&
594 !(issued
& CEPH_CAP_DIR_CREATE
)) {
595 ceph_put_string(rcu_dereference_raw(ci
->i_cached_layout
.pool_ns
));
596 memset(&ci
->i_cached_layout
, 0, sizeof(ci
->i_cached_layout
));
601 * change_auth_cap_ses - move inode to appropriate lists when auth caps change
602 * @ci: inode to be moved
603 * @session: new auth caps session
605 static void change_auth_cap_ses(struct ceph_inode_info
*ci
,
606 struct ceph_mds_session
*session
)
608 lockdep_assert_held(&ci
->i_ceph_lock
);
610 if (list_empty(&ci
->i_dirty_item
) && list_empty(&ci
->i_flushing_item
))
613 spin_lock(&session
->s_mdsc
->cap_dirty_lock
);
614 if (!list_empty(&ci
->i_dirty_item
))
615 list_move(&ci
->i_dirty_item
, &session
->s_cap_dirty
);
616 if (!list_empty(&ci
->i_flushing_item
))
617 list_move_tail(&ci
->i_flushing_item
, &session
->s_cap_flushing
);
618 spin_unlock(&session
->s_mdsc
->cap_dirty_lock
);
622 * Add a capability under the given MDS session.
624 * Caller should hold session snap_rwsem (read) and ci->i_ceph_lock
626 * @fmode is the open file mode, if we are opening a file, otherwise
627 * it is < 0. (This is so we can atomically add the cap and add an
628 * open file reference to it.)
630 void ceph_add_cap(struct inode
*inode
,
631 struct ceph_mds_session
*session
, u64 cap_id
,
632 unsigned issued
, unsigned wanted
,
633 unsigned seq
, unsigned mseq
, u64 realmino
, int flags
,
634 struct ceph_cap
**new_cap
)
636 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
637 struct ceph_inode_info
*ci
= ceph_inode(inode
);
638 struct ceph_cap
*cap
;
639 int mds
= session
->s_mds
;
643 lockdep_assert_held(&ci
->i_ceph_lock
);
645 dout("add_cap %p mds%d cap %llx %s seq %d\n", inode
,
646 session
->s_mds
, cap_id
, ceph_cap_string(issued
), seq
);
648 gen
= atomic_read(&session
->s_cap_gen
);
650 cap
= __get_cap_for_mds(ci
, mds
);
656 cap
->implemented
= 0;
662 __insert_cap_node(ci
, cap
);
664 /* add to session cap list */
665 cap
->session
= session
;
666 spin_lock(&session
->s_cap_lock
);
667 list_add_tail(&cap
->session_caps
, &session
->s_caps
);
668 session
->s_nr_caps
++;
669 atomic64_inc(&mdsc
->metric
.total_caps
);
670 spin_unlock(&session
->s_cap_lock
);
672 spin_lock(&session
->s_cap_lock
);
673 list_move_tail(&cap
->session_caps
, &session
->s_caps
);
674 spin_unlock(&session
->s_cap_lock
);
676 if (cap
->cap_gen
< gen
)
677 cap
->issued
= cap
->implemented
= CEPH_CAP_PIN
;
680 * auth mds of the inode changed. we received the cap export
681 * message, but still haven't received the cap import message.
682 * handle_cap_export() updated the new auth MDS' cap.
684 * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing
685 * a message that was send before the cap import message. So
688 if (ceph_seq_cmp(seq
, cap
->seq
) <= 0) {
689 WARN_ON(cap
!= ci
->i_auth_cap
);
690 WARN_ON(cap
->cap_id
!= cap_id
);
693 issued
|= cap
->issued
;
694 flags
|= CEPH_CAP_FLAG_AUTH
;
698 if (!ci
->i_snap_realm
||
699 ((flags
& CEPH_CAP_FLAG_AUTH
) &&
700 realmino
!= (u64
)-1 && ci
->i_snap_realm
->ino
!= realmino
)) {
702 * add this inode to the appropriate snap realm
704 struct ceph_snap_realm
*realm
= ceph_lookup_snap_realm(mdsc
,
707 ceph_change_snap_realm(inode
, realm
);
709 WARN(1, "%s: couldn't find snap realm 0x%llx (ino 0x%llx oldrealm 0x%llx)\n",
710 __func__
, realmino
, ci
->i_vino
.ino
,
711 ci
->i_snap_realm
? ci
->i_snap_realm
->ino
: 0);
714 __check_cap_issue(ci
, cap
, issued
);
717 * If we are issued caps we don't want, or the mds' wanted
718 * value appears to be off, queue a check so we'll release
719 * later and/or update the mds wanted value.
721 actual_wanted
= __ceph_caps_wanted(ci
);
722 if ((wanted
& ~actual_wanted
) ||
723 (issued
& ~actual_wanted
& CEPH_CAP_ANY_WR
)) {
724 dout(" issued %s, mds wanted %s, actual %s, queueing\n",
725 ceph_cap_string(issued
), ceph_cap_string(wanted
),
726 ceph_cap_string(actual_wanted
));
727 __cap_delay_requeue(mdsc
, ci
);
730 if (flags
& CEPH_CAP_FLAG_AUTH
) {
731 if (!ci
->i_auth_cap
||
732 ceph_seq_cmp(ci
->i_auth_cap
->mseq
, mseq
) < 0) {
733 if (ci
->i_auth_cap
&&
734 ci
->i_auth_cap
->session
!= cap
->session
)
735 change_auth_cap_ses(ci
, cap
->session
);
736 ci
->i_auth_cap
= cap
;
737 cap
->mds_wanted
= wanted
;
740 WARN_ON(ci
->i_auth_cap
== cap
);
743 dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n",
744 inode
, ceph_vinop(inode
), cap
, ceph_cap_string(issued
),
745 ceph_cap_string(issued
|cap
->issued
), seq
, mds
);
746 cap
->cap_id
= cap_id
;
747 cap
->issued
= issued
;
748 cap
->implemented
|= issued
;
749 if (ceph_seq_cmp(mseq
, cap
->mseq
) > 0)
750 cap
->mds_wanted
= wanted
;
752 cap
->mds_wanted
|= wanted
;
754 cap
->issue_seq
= seq
;
760 * Return true if cap has not timed out and belongs to the current
761 * generation of the MDS session (i.e. has not gone 'stale' due to
762 * us losing touch with the mds).
764 static int __cap_is_valid(struct ceph_cap
*cap
)
769 gen
= atomic_read(&cap
->session
->s_cap_gen
);
770 ttl
= cap
->session
->s_cap_ttl
;
772 if (cap
->cap_gen
< gen
|| time_after_eq(jiffies
, ttl
)) {
773 dout("__cap_is_valid %p cap %p issued %s "
774 "but STALE (gen %u vs %u)\n", &cap
->ci
->vfs_inode
,
775 cap
, ceph_cap_string(cap
->issued
), cap
->cap_gen
, gen
);
783 * Return set of valid cap bits issued to us. Note that caps time
784 * out, and may be invalidated in bulk if the client session times out
785 * and session->s_cap_gen is bumped.
787 int __ceph_caps_issued(struct ceph_inode_info
*ci
, int *implemented
)
789 int have
= ci
->i_snap_caps
;
790 struct ceph_cap
*cap
;
795 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
796 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
797 if (!__cap_is_valid(cap
))
799 dout("__ceph_caps_issued %p cap %p issued %s\n",
800 &ci
->vfs_inode
, cap
, ceph_cap_string(cap
->issued
));
803 *implemented
|= cap
->implemented
;
806 * exclude caps issued by non-auth MDS, but are been revoking
807 * by the auth MDS. The non-auth MDS should be revoking/exporting
808 * these caps, but the message is delayed.
810 if (ci
->i_auth_cap
) {
811 cap
= ci
->i_auth_cap
;
812 have
&= ~cap
->implemented
| cap
->issued
;
818 * Get cap bits issued by caps other than @ocap
820 int __ceph_caps_issued_other(struct ceph_inode_info
*ci
, struct ceph_cap
*ocap
)
822 int have
= ci
->i_snap_caps
;
823 struct ceph_cap
*cap
;
826 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
827 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
830 if (!__cap_is_valid(cap
))
838 * Move a cap to the end of the LRU (oldest caps at list head, newest
841 static void __touch_cap(struct ceph_cap
*cap
)
843 struct ceph_mds_session
*s
= cap
->session
;
845 spin_lock(&s
->s_cap_lock
);
846 if (!s
->s_cap_iterator
) {
847 dout("__touch_cap %p cap %p mds%d\n", &cap
->ci
->vfs_inode
, cap
,
849 list_move_tail(&cap
->session_caps
, &s
->s_caps
);
851 dout("__touch_cap %p cap %p mds%d NOP, iterating over caps\n",
852 &cap
->ci
->vfs_inode
, cap
, s
->s_mds
);
854 spin_unlock(&s
->s_cap_lock
);
858 * Check if we hold the given mask. If so, move the cap(s) to the
859 * front of their respective LRUs. (This is the preferred way for
860 * callers to check for caps they want.)
862 int __ceph_caps_issued_mask(struct ceph_inode_info
*ci
, int mask
, int touch
)
864 struct ceph_cap
*cap
;
866 int have
= ci
->i_snap_caps
;
868 if ((have
& mask
) == mask
) {
869 dout("__ceph_caps_issued_mask ino 0x%llx snap issued %s"
870 " (mask %s)\n", ceph_ino(&ci
->vfs_inode
),
871 ceph_cap_string(have
),
872 ceph_cap_string(mask
));
876 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
877 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
878 if (!__cap_is_valid(cap
))
880 if ((cap
->issued
& mask
) == mask
) {
881 dout("__ceph_caps_issued_mask ino 0x%llx cap %p issued %s"
882 " (mask %s)\n", ceph_ino(&ci
->vfs_inode
), cap
,
883 ceph_cap_string(cap
->issued
),
884 ceph_cap_string(mask
));
890 /* does a combination of caps satisfy mask? */
892 if ((have
& mask
) == mask
) {
893 dout("__ceph_caps_issued_mask ino 0x%llx combo issued %s"
894 " (mask %s)\n", ceph_ino(&ci
->vfs_inode
),
895 ceph_cap_string(cap
->issued
),
896 ceph_cap_string(mask
));
900 /* touch this + preceding caps */
902 for (q
= rb_first(&ci
->i_caps
); q
!= p
;
904 cap
= rb_entry(q
, struct ceph_cap
,
906 if (!__cap_is_valid(cap
))
908 if (cap
->issued
& mask
)
919 int __ceph_caps_issued_mask_metric(struct ceph_inode_info
*ci
, int mask
,
922 struct ceph_fs_client
*fsc
= ceph_sb_to_client(ci
->vfs_inode
.i_sb
);
925 r
= __ceph_caps_issued_mask(ci
, mask
, touch
);
927 ceph_update_cap_hit(&fsc
->mdsc
->metric
);
929 ceph_update_cap_mis(&fsc
->mdsc
->metric
);
934 * Return true if mask caps are currently being revoked by an MDS.
936 int __ceph_caps_revoking_other(struct ceph_inode_info
*ci
,
937 struct ceph_cap
*ocap
, int mask
)
939 struct ceph_cap
*cap
;
942 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
943 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
945 (cap
->implemented
& ~cap
->issued
& mask
))
951 int ceph_caps_revoking(struct ceph_inode_info
*ci
, int mask
)
953 struct inode
*inode
= &ci
->vfs_inode
;
956 spin_lock(&ci
->i_ceph_lock
);
957 ret
= __ceph_caps_revoking_other(ci
, NULL
, mask
);
958 spin_unlock(&ci
->i_ceph_lock
);
959 dout("ceph_caps_revoking %p %s = %d\n", inode
,
960 ceph_cap_string(mask
), ret
);
964 int __ceph_caps_used(struct ceph_inode_info
*ci
)
968 used
|= CEPH_CAP_PIN
;
970 used
|= CEPH_CAP_FILE_RD
;
971 if (ci
->i_rdcache_ref
||
972 (S_ISREG(ci
->vfs_inode
.i_mode
) &&
973 ci
->vfs_inode
.i_data
.nrpages
))
974 used
|= CEPH_CAP_FILE_CACHE
;
976 used
|= CEPH_CAP_FILE_WR
;
977 if (ci
->i_wb_ref
|| ci
->i_wrbuffer_ref
)
978 used
|= CEPH_CAP_FILE_BUFFER
;
980 used
|= CEPH_CAP_FILE_EXCL
;
984 #define FMODE_WAIT_BIAS 1000
987 * wanted, by virtue of open file modes
989 int __ceph_caps_file_wanted(struct ceph_inode_info
*ci
)
991 const int PIN_SHIFT
= ffs(CEPH_FILE_MODE_PIN
);
992 const int RD_SHIFT
= ffs(CEPH_FILE_MODE_RD
);
993 const int WR_SHIFT
= ffs(CEPH_FILE_MODE_WR
);
994 const int LAZY_SHIFT
= ffs(CEPH_FILE_MODE_LAZY
);
995 struct ceph_mount_options
*opt
=
996 ceph_inode_to_client(&ci
->vfs_inode
)->mount_options
;
997 unsigned long used_cutoff
= jiffies
- opt
->caps_wanted_delay_max
* HZ
;
998 unsigned long idle_cutoff
= jiffies
- opt
->caps_wanted_delay_min
* HZ
;
1000 if (S_ISDIR(ci
->vfs_inode
.i_mode
)) {
1003 /* use used_cutoff here, to keep dir's wanted caps longer */
1004 if (ci
->i_nr_by_mode
[RD_SHIFT
] > 0 ||
1005 time_after(ci
->i_last_rd
, used_cutoff
))
1006 want
|= CEPH_CAP_ANY_SHARED
;
1008 if (ci
->i_nr_by_mode
[WR_SHIFT
] > 0 ||
1009 time_after(ci
->i_last_wr
, used_cutoff
)) {
1010 want
|= CEPH_CAP_ANY_SHARED
| CEPH_CAP_FILE_EXCL
;
1011 if (opt
->flags
& CEPH_MOUNT_OPT_ASYNC_DIROPS
)
1012 want
|= CEPH_CAP_ANY_DIR_OPS
;
1015 if (want
|| ci
->i_nr_by_mode
[PIN_SHIFT
] > 0)
1016 want
|= CEPH_CAP_PIN
;
1022 if (ci
->i_nr_by_mode
[RD_SHIFT
] > 0) {
1023 if (ci
->i_nr_by_mode
[RD_SHIFT
] >= FMODE_WAIT_BIAS
||
1024 time_after(ci
->i_last_rd
, used_cutoff
))
1025 bits
|= 1 << RD_SHIFT
;
1026 } else if (time_after(ci
->i_last_rd
, idle_cutoff
)) {
1027 bits
|= 1 << RD_SHIFT
;
1030 if (ci
->i_nr_by_mode
[WR_SHIFT
] > 0) {
1031 if (ci
->i_nr_by_mode
[WR_SHIFT
] >= FMODE_WAIT_BIAS
||
1032 time_after(ci
->i_last_wr
, used_cutoff
))
1033 bits
|= 1 << WR_SHIFT
;
1034 } else if (time_after(ci
->i_last_wr
, idle_cutoff
)) {
1035 bits
|= 1 << WR_SHIFT
;
1038 /* check lazyio only when read/write is wanted */
1039 if ((bits
& (CEPH_FILE_MODE_RDWR
<< 1)) &&
1040 ci
->i_nr_by_mode
[LAZY_SHIFT
] > 0)
1041 bits
|= 1 << LAZY_SHIFT
;
1043 return bits
? ceph_caps_for_mode(bits
>> 1) : 0;
1048 * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
1050 int __ceph_caps_wanted(struct ceph_inode_info
*ci
)
1052 int w
= __ceph_caps_file_wanted(ci
) | __ceph_caps_used(ci
);
1053 if (S_ISDIR(ci
->vfs_inode
.i_mode
)) {
1054 /* we want EXCL if holding caps of dir ops */
1055 if (w
& CEPH_CAP_ANY_DIR_OPS
)
1056 w
|= CEPH_CAP_FILE_EXCL
;
1058 /* we want EXCL if dirty data */
1059 if (w
& CEPH_CAP_FILE_BUFFER
)
1060 w
|= CEPH_CAP_FILE_EXCL
;
1066 * Return caps we have registered with the MDS(s) as 'wanted'.
1068 int __ceph_caps_mds_wanted(struct ceph_inode_info
*ci
, bool check
)
1070 struct ceph_cap
*cap
;
1074 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
1075 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1076 if (check
&& !__cap_is_valid(cap
))
1078 if (cap
== ci
->i_auth_cap
)
1079 mds_wanted
|= cap
->mds_wanted
;
1081 mds_wanted
|= (cap
->mds_wanted
& ~CEPH_CAP_ANY_FILE_WR
);
1086 int ceph_is_any_caps(struct inode
*inode
)
1088 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1091 spin_lock(&ci
->i_ceph_lock
);
1092 ret
= __ceph_is_any_real_caps(ci
);
1093 spin_unlock(&ci
->i_ceph_lock
);
1099 * Remove a cap. Take steps to deal with a racing iterate_session_caps.
1101 * caller should hold i_ceph_lock.
1102 * caller will not hold session s_mutex if called from destroy_inode.
1104 void __ceph_remove_cap(struct ceph_cap
*cap
, bool queue_release
)
1106 struct ceph_mds_session
*session
= cap
->session
;
1107 struct ceph_inode_info
*ci
= cap
->ci
;
1108 struct ceph_mds_client
*mdsc
;
1111 /* 'ci' being NULL means the remove have already occurred */
1113 dout("%s: cap inode is NULL\n", __func__
);
1117 lockdep_assert_held(&ci
->i_ceph_lock
);
1119 dout("__ceph_remove_cap %p from %p\n", cap
, &ci
->vfs_inode
);
1121 mdsc
= ceph_inode_to_client(&ci
->vfs_inode
)->mdsc
;
1123 /* remove from inode's cap rbtree, and clear auth cap */
1124 rb_erase(&cap
->ci_node
, &ci
->i_caps
);
1125 if (ci
->i_auth_cap
== cap
)
1126 ci
->i_auth_cap
= NULL
;
1128 /* remove from session list */
1129 spin_lock(&session
->s_cap_lock
);
1130 if (session
->s_cap_iterator
== cap
) {
1131 /* not yet, we are iterating over this very cap */
1132 dout("__ceph_remove_cap delaying %p removal from session %p\n",
1135 list_del_init(&cap
->session_caps
);
1136 session
->s_nr_caps
--;
1137 atomic64_dec(&mdsc
->metric
.total_caps
);
1138 cap
->session
= NULL
;
1141 /* protect backpointer with s_cap_lock: see iterate_session_caps */
1145 * s_cap_reconnect is protected by s_cap_lock. no one changes
1146 * s_cap_gen while session is in the reconnect state.
1148 if (queue_release
&&
1149 (!session
->s_cap_reconnect
||
1150 cap
->cap_gen
== atomic_read(&session
->s_cap_gen
))) {
1151 cap
->queue_release
= 1;
1153 __ceph_queue_cap_release(session
, cap
);
1157 cap
->queue_release
= 0;
1159 cap
->cap_ino
= ci
->i_vino
.ino
;
1161 spin_unlock(&session
->s_cap_lock
);
1164 ceph_put_cap(mdsc
, cap
);
1166 if (!__ceph_is_any_real_caps(ci
)) {
1167 /* when reconnect denied, we remove session caps forcibly,
1168 * i_wr_ref can be non-zero. If there are ongoing write,
1169 * keep i_snap_realm.
1171 if (ci
->i_wr_ref
== 0 && ci
->i_snap_realm
)
1172 ceph_change_snap_realm(&ci
->vfs_inode
, NULL
);
1174 __cap_delay_cancel(mdsc
, ci
);
1178 void ceph_remove_cap(struct ceph_cap
*cap
, bool queue_release
)
1180 struct ceph_inode_info
*ci
= cap
->ci
;
1181 struct ceph_fs_client
*fsc
;
1183 /* 'ci' being NULL means the remove have already occurred */
1185 dout("%s: cap inode is NULL\n", __func__
);
1189 lockdep_assert_held(&ci
->i_ceph_lock
);
1191 fsc
= ceph_sb_to_client(ci
->vfs_inode
.i_sb
);
1192 WARN_ON_ONCE(ci
->i_auth_cap
== cap
&&
1193 !list_empty(&ci
->i_dirty_item
) &&
1194 !fsc
->blocklisted
&&
1195 READ_ONCE(fsc
->mount_state
) != CEPH_MOUNT_SHUTDOWN
);
1197 __ceph_remove_cap(cap
, queue_release
);
1200 struct cap_msg_args
{
1201 struct ceph_mds_session
*session
;
1202 u64 ino
, cid
, follows
;
1203 u64 flush_tid
, oldest_flush_tid
, size
, max_size
;
1206 struct ceph_buffer
*xattr_buf
;
1207 struct ceph_buffer
*old_xattr_buf
;
1208 struct timespec64 atime
, mtime
, ctime
, btime
;
1209 int op
, caps
, wanted
, dirty
;
1210 u32 seq
, issue_seq
, mseq
, time_warp_seq
;
1220 * cap struct size + flock buffer size + inline version + inline data size +
1221 * osd_epoch_barrier + oldest_flush_tid
1223 #define CAP_MSG_SIZE (sizeof(struct ceph_mds_caps) + \
1224 4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4)
1226 /* Marshal up the cap msg to the MDS */
1227 static void encode_cap_msg(struct ceph_msg
*msg
, struct cap_msg_args
*arg
)
1229 struct ceph_mds_caps
*fc
;
1231 struct ceph_osd_client
*osdc
= &arg
->session
->s_mdsc
->fsc
->client
->osdc
;
1233 dout("%s %s %llx %llx caps %s wanted %s dirty %s seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu xattr_ver %llu xattr_len %d\n",
1234 __func__
, ceph_cap_op_name(arg
->op
), arg
->cid
, arg
->ino
,
1235 ceph_cap_string(arg
->caps
), ceph_cap_string(arg
->wanted
),
1236 ceph_cap_string(arg
->dirty
), arg
->seq
, arg
->issue_seq
,
1237 arg
->flush_tid
, arg
->oldest_flush_tid
, arg
->mseq
, arg
->follows
,
1238 arg
->size
, arg
->max_size
, arg
->xattr_version
,
1239 arg
->xattr_buf
? (int)arg
->xattr_buf
->vec
.iov_len
: 0);
1241 msg
->hdr
.version
= cpu_to_le16(10);
1242 msg
->hdr
.tid
= cpu_to_le64(arg
->flush_tid
);
1244 fc
= msg
->front
.iov_base
;
1245 memset(fc
, 0, sizeof(*fc
));
1247 fc
->cap_id
= cpu_to_le64(arg
->cid
);
1248 fc
->op
= cpu_to_le32(arg
->op
);
1249 fc
->seq
= cpu_to_le32(arg
->seq
);
1250 fc
->issue_seq
= cpu_to_le32(arg
->issue_seq
);
1251 fc
->migrate_seq
= cpu_to_le32(arg
->mseq
);
1252 fc
->caps
= cpu_to_le32(arg
->caps
);
1253 fc
->wanted
= cpu_to_le32(arg
->wanted
);
1254 fc
->dirty
= cpu_to_le32(arg
->dirty
);
1255 fc
->ino
= cpu_to_le64(arg
->ino
);
1256 fc
->snap_follows
= cpu_to_le64(arg
->follows
);
1258 fc
->size
= cpu_to_le64(arg
->size
);
1259 fc
->max_size
= cpu_to_le64(arg
->max_size
);
1260 ceph_encode_timespec64(&fc
->mtime
, &arg
->mtime
);
1261 ceph_encode_timespec64(&fc
->atime
, &arg
->atime
);
1262 ceph_encode_timespec64(&fc
->ctime
, &arg
->ctime
);
1263 fc
->time_warp_seq
= cpu_to_le32(arg
->time_warp_seq
);
1265 fc
->uid
= cpu_to_le32(from_kuid(&init_user_ns
, arg
->uid
));
1266 fc
->gid
= cpu_to_le32(from_kgid(&init_user_ns
, arg
->gid
));
1267 fc
->mode
= cpu_to_le32(arg
->mode
);
1269 fc
->xattr_version
= cpu_to_le64(arg
->xattr_version
);
1270 if (arg
->xattr_buf
) {
1271 msg
->middle
= ceph_buffer_get(arg
->xattr_buf
);
1272 fc
->xattr_len
= cpu_to_le32(arg
->xattr_buf
->vec
.iov_len
);
1273 msg
->hdr
.middle_len
= cpu_to_le32(arg
->xattr_buf
->vec
.iov_len
);
1277 /* flock buffer size (version 2) */
1278 ceph_encode_32(&p
, 0);
1279 /* inline version (version 4) */
1280 ceph_encode_64(&p
, arg
->inline_data
? 0 : CEPH_INLINE_NONE
);
1281 /* inline data size */
1282 ceph_encode_32(&p
, 0);
1284 * osd_epoch_barrier (version 5)
1285 * The epoch_barrier is protected osdc->lock, so READ_ONCE here in
1286 * case it was recently changed
1288 ceph_encode_32(&p
, READ_ONCE(osdc
->epoch_barrier
));
1289 /* oldest_flush_tid (version 6) */
1290 ceph_encode_64(&p
, arg
->oldest_flush_tid
);
1293 * caller_uid/caller_gid (version 7)
1295 * Currently, we don't properly track which caller dirtied the caps
1296 * last, and force a flush of them when there is a conflict. For now,
1297 * just set this to 0:0, to emulate how the MDS has worked up to now.
1299 ceph_encode_32(&p
, 0);
1300 ceph_encode_32(&p
, 0);
1302 /* pool namespace (version 8) (mds always ignores this) */
1303 ceph_encode_32(&p
, 0);
1305 /* btime and change_attr (version 9) */
1306 ceph_encode_timespec64(p
, &arg
->btime
);
1307 p
+= sizeof(struct ceph_timespec
);
1308 ceph_encode_64(&p
, arg
->change_attr
);
1310 /* Advisory flags (version 10) */
1311 ceph_encode_32(&p
, arg
->flags
);
1315 * Queue cap releases when an inode is dropped from our cache.
1317 void __ceph_remove_caps(struct ceph_inode_info
*ci
)
1321 /* lock i_ceph_lock, because ceph_d_revalidate(..., LOOKUP_RCU)
1322 * may call __ceph_caps_issued_mask() on a freeing inode. */
1323 spin_lock(&ci
->i_ceph_lock
);
1324 p
= rb_first(&ci
->i_caps
);
1326 struct ceph_cap
*cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
1328 ceph_remove_cap(cap
, true);
1330 spin_unlock(&ci
->i_ceph_lock
);
1334 * Prepare to send a cap message to an MDS. Update the cap state, and populate
1335 * the arg struct with the parameters that will need to be sent. This should
1336 * be done under the i_ceph_lock to guard against changes to cap state.
1338 * Make note of max_size reported/requested from mds, revoked caps
1339 * that have now been implemented.
1341 static void __prep_cap(struct cap_msg_args
*arg
, struct ceph_cap
*cap
,
1342 int op
, int flags
, int used
, int want
, int retain
,
1343 int flushing
, u64 flush_tid
, u64 oldest_flush_tid
)
1345 struct ceph_inode_info
*ci
= cap
->ci
;
1346 struct inode
*inode
= &ci
->vfs_inode
;
1349 lockdep_assert_held(&ci
->i_ceph_lock
);
1351 held
= cap
->issued
| cap
->implemented
;
1352 revoking
= cap
->implemented
& ~cap
->issued
;
1353 retain
&= ~revoking
;
1355 dout("%s %p cap %p session %p %s -> %s (revoking %s)\n",
1356 __func__
, inode
, cap
, cap
->session
,
1357 ceph_cap_string(held
), ceph_cap_string(held
& retain
),
1358 ceph_cap_string(revoking
));
1359 BUG_ON((retain
& CEPH_CAP_PIN
) == 0);
1361 ci
->i_ceph_flags
&= ~CEPH_I_FLUSH
;
1363 cap
->issued
&= retain
; /* drop bits we don't want */
1365 * Wake up any waiters on wanted -> needed transition. This is due to
1366 * the weird transition from buffered to sync IO... we need to flush
1367 * dirty pages _before_ allowing sync writes to avoid reordering.
1369 arg
->wake
= cap
->implemented
& ~cap
->issued
;
1370 cap
->implemented
&= cap
->issued
| used
;
1371 cap
->mds_wanted
= want
;
1373 arg
->session
= cap
->session
;
1374 arg
->ino
= ceph_vino(inode
).ino
;
1375 arg
->cid
= cap
->cap_id
;
1376 arg
->follows
= flushing
? ci
->i_head_snapc
->seq
: 0;
1377 arg
->flush_tid
= flush_tid
;
1378 arg
->oldest_flush_tid
= oldest_flush_tid
;
1380 arg
->size
= i_size_read(inode
);
1381 ci
->i_reported_size
= arg
->size
;
1382 arg
->max_size
= ci
->i_wanted_max_size
;
1383 if (cap
== ci
->i_auth_cap
) {
1384 if (want
& CEPH_CAP_ANY_FILE_WR
)
1385 ci
->i_requested_max_size
= arg
->max_size
;
1387 ci
->i_requested_max_size
= 0;
1390 if (flushing
& CEPH_CAP_XATTR_EXCL
) {
1391 arg
->old_xattr_buf
= __ceph_build_xattrs_blob(ci
);
1392 arg
->xattr_version
= ci
->i_xattrs
.version
;
1393 arg
->xattr_buf
= ci
->i_xattrs
.blob
;
1395 arg
->xattr_buf
= NULL
;
1396 arg
->old_xattr_buf
= NULL
;
1399 arg
->mtime
= inode
->i_mtime
;
1400 arg
->atime
= inode
->i_atime
;
1401 arg
->ctime
= inode
->i_ctime
;
1402 arg
->btime
= ci
->i_btime
;
1403 arg
->change_attr
= inode_peek_iversion_raw(inode
);
1406 arg
->caps
= cap
->implemented
;
1408 arg
->dirty
= flushing
;
1410 arg
->seq
= cap
->seq
;
1411 arg
->issue_seq
= cap
->issue_seq
;
1412 arg
->mseq
= cap
->mseq
;
1413 arg
->time_warp_seq
= ci
->i_time_warp_seq
;
1415 arg
->uid
= inode
->i_uid
;
1416 arg
->gid
= inode
->i_gid
;
1417 arg
->mode
= inode
->i_mode
;
1419 arg
->inline_data
= ci
->i_inline_version
!= CEPH_INLINE_NONE
;
1420 if (!(flags
& CEPH_CLIENT_CAPS_PENDING_CAPSNAP
) &&
1421 !list_empty(&ci
->i_cap_snaps
)) {
1422 struct ceph_cap_snap
*capsnap
;
1423 list_for_each_entry_reverse(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
1424 if (capsnap
->cap_flush
.tid
)
1426 if (capsnap
->need_flush
) {
1427 flags
|= CEPH_CLIENT_CAPS_PENDING_CAPSNAP
;
1436 * Send a cap msg on the given inode.
1438 * Caller should hold snap_rwsem (read), s_mutex.
1440 static void __send_cap(struct cap_msg_args
*arg
, struct ceph_inode_info
*ci
)
1442 struct ceph_msg
*msg
;
1443 struct inode
*inode
= &ci
->vfs_inode
;
1445 msg
= ceph_msg_new(CEPH_MSG_CLIENT_CAPS
, CAP_MSG_SIZE
, GFP_NOFS
, false);
1447 pr_err("error allocating cap msg: ino (%llx.%llx) flushing %s tid %llu, requeuing cap.\n",
1448 ceph_vinop(inode
), ceph_cap_string(arg
->dirty
),
1450 spin_lock(&ci
->i_ceph_lock
);
1451 __cap_delay_requeue(arg
->session
->s_mdsc
, ci
);
1452 spin_unlock(&ci
->i_ceph_lock
);
1456 encode_cap_msg(msg
, arg
);
1457 ceph_con_send(&arg
->session
->s_con
, msg
);
1458 ceph_buffer_put(arg
->old_xattr_buf
);
1460 wake_up_all(&ci
->i_cap_wq
);
1463 static inline int __send_flush_snap(struct inode
*inode
,
1464 struct ceph_mds_session
*session
,
1465 struct ceph_cap_snap
*capsnap
,
1466 u32 mseq
, u64 oldest_flush_tid
)
1468 struct cap_msg_args arg
;
1469 struct ceph_msg
*msg
;
1471 msg
= ceph_msg_new(CEPH_MSG_CLIENT_CAPS
, CAP_MSG_SIZE
, GFP_NOFS
, false);
1475 arg
.session
= session
;
1476 arg
.ino
= ceph_vino(inode
).ino
;
1478 arg
.follows
= capsnap
->follows
;
1479 arg
.flush_tid
= capsnap
->cap_flush
.tid
;
1480 arg
.oldest_flush_tid
= oldest_flush_tid
;
1482 arg
.size
= capsnap
->size
;
1484 arg
.xattr_version
= capsnap
->xattr_version
;
1485 arg
.xattr_buf
= capsnap
->xattr_blob
;
1486 arg
.old_xattr_buf
= NULL
;
1488 arg
.atime
= capsnap
->atime
;
1489 arg
.mtime
= capsnap
->mtime
;
1490 arg
.ctime
= capsnap
->ctime
;
1491 arg
.btime
= capsnap
->btime
;
1492 arg
.change_attr
= capsnap
->change_attr
;
1494 arg
.op
= CEPH_CAP_OP_FLUSHSNAP
;
1495 arg
.caps
= capsnap
->issued
;
1497 arg
.dirty
= capsnap
->dirty
;
1502 arg
.time_warp_seq
= capsnap
->time_warp_seq
;
1504 arg
.uid
= capsnap
->uid
;
1505 arg
.gid
= capsnap
->gid
;
1506 arg
.mode
= capsnap
->mode
;
1508 arg
.inline_data
= capsnap
->inline_data
;
1512 encode_cap_msg(msg
, &arg
);
1513 ceph_con_send(&arg
.session
->s_con
, msg
);
1518 * When a snapshot is taken, clients accumulate dirty metadata on
1519 * inodes with capabilities in ceph_cap_snaps to describe the file
1520 * state at the time the snapshot was taken. This must be flushed
1521 * asynchronously back to the MDS once sync writes complete and dirty
1522 * data is written out.
1524 * Called under i_ceph_lock.
1526 static void __ceph_flush_snaps(struct ceph_inode_info
*ci
,
1527 struct ceph_mds_session
*session
)
1528 __releases(ci
->i_ceph_lock
)
1529 __acquires(ci
->i_ceph_lock
)
1531 struct inode
*inode
= &ci
->vfs_inode
;
1532 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
1533 struct ceph_cap_snap
*capsnap
;
1534 u64 oldest_flush_tid
= 0;
1535 u64 first_tid
= 1, last_tid
= 0;
1537 dout("__flush_snaps %p session %p\n", inode
, session
);
1539 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
1541 * we need to wait for sync writes to complete and for dirty
1542 * pages to be written out.
1544 if (capsnap
->dirty_pages
|| capsnap
->writing
)
1547 /* should be removed by ceph_try_drop_cap_snap() */
1548 BUG_ON(!capsnap
->need_flush
);
1550 /* only flush each capsnap once */
1551 if (capsnap
->cap_flush
.tid
> 0) {
1552 dout(" already flushed %p, skipping\n", capsnap
);
1556 spin_lock(&mdsc
->cap_dirty_lock
);
1557 capsnap
->cap_flush
.tid
= ++mdsc
->last_cap_flush_tid
;
1558 list_add_tail(&capsnap
->cap_flush
.g_list
,
1559 &mdsc
->cap_flush_list
);
1560 if (oldest_flush_tid
== 0)
1561 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
1562 if (list_empty(&ci
->i_flushing_item
)) {
1563 list_add_tail(&ci
->i_flushing_item
,
1564 &session
->s_cap_flushing
);
1566 spin_unlock(&mdsc
->cap_dirty_lock
);
1568 list_add_tail(&capsnap
->cap_flush
.i_list
,
1569 &ci
->i_cap_flush_list
);
1572 first_tid
= capsnap
->cap_flush
.tid
;
1573 last_tid
= capsnap
->cap_flush
.tid
;
1576 ci
->i_ceph_flags
&= ~CEPH_I_FLUSH_SNAPS
;
1578 while (first_tid
<= last_tid
) {
1579 struct ceph_cap
*cap
= ci
->i_auth_cap
;
1580 struct ceph_cap_flush
*cf
;
1583 if (!(cap
&& cap
->session
== session
)) {
1584 dout("__flush_snaps %p auth cap %p not mds%d, "
1585 "stop\n", inode
, cap
, session
->s_mds
);
1590 list_for_each_entry(cf
, &ci
->i_cap_flush_list
, i_list
) {
1591 if (cf
->tid
>= first_tid
) {
1599 first_tid
= cf
->tid
+ 1;
1601 capsnap
= container_of(cf
, struct ceph_cap_snap
, cap_flush
);
1602 refcount_inc(&capsnap
->nref
);
1603 spin_unlock(&ci
->i_ceph_lock
);
1605 dout("__flush_snaps %p capsnap %p tid %llu %s\n",
1606 inode
, capsnap
, cf
->tid
, ceph_cap_string(capsnap
->dirty
));
1608 ret
= __send_flush_snap(inode
, session
, capsnap
, cap
->mseq
,
1611 pr_err("__flush_snaps: error sending cap flushsnap, "
1612 "ino (%llx.%llx) tid %llu follows %llu\n",
1613 ceph_vinop(inode
), cf
->tid
, capsnap
->follows
);
1616 ceph_put_cap_snap(capsnap
);
1617 spin_lock(&ci
->i_ceph_lock
);
1621 void ceph_flush_snaps(struct ceph_inode_info
*ci
,
1622 struct ceph_mds_session
**psession
)
1624 struct inode
*inode
= &ci
->vfs_inode
;
1625 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
1626 struct ceph_mds_session
*session
= NULL
;
1629 dout("ceph_flush_snaps %p\n", inode
);
1631 session
= *psession
;
1633 spin_lock(&ci
->i_ceph_lock
);
1634 if (!(ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
)) {
1635 dout(" no capsnap needs flush, doing nothing\n");
1638 if (!ci
->i_auth_cap
) {
1639 dout(" no auth cap (migrating?), doing nothing\n");
1643 mds
= ci
->i_auth_cap
->session
->s_mds
;
1644 if (session
&& session
->s_mds
!= mds
) {
1645 dout(" oops, wrong session %p mutex\n", session
);
1646 ceph_put_mds_session(session
);
1650 spin_unlock(&ci
->i_ceph_lock
);
1651 mutex_lock(&mdsc
->mutex
);
1652 session
= __ceph_lookup_mds_session(mdsc
, mds
);
1653 mutex_unlock(&mdsc
->mutex
);
1657 // make sure flushsnap messages are sent in proper order.
1658 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
)
1659 __kick_flushing_caps(mdsc
, session
, ci
, 0);
1661 __ceph_flush_snaps(ci
, session
);
1663 spin_unlock(&ci
->i_ceph_lock
);
1666 *psession
= session
;
1668 ceph_put_mds_session(session
);
1669 /* we flushed them all; remove this inode from the queue */
1670 spin_lock(&mdsc
->snap_flush_lock
);
1671 list_del_init(&ci
->i_snap_flush_item
);
1672 spin_unlock(&mdsc
->snap_flush_lock
);
1676 * Mark caps dirty. If inode is newly dirty, return the dirty flags.
1677 * Caller is then responsible for calling __mark_inode_dirty with the
1678 * returned flags value.
1680 int __ceph_mark_dirty_caps(struct ceph_inode_info
*ci
, int mask
,
1681 struct ceph_cap_flush
**pcf
)
1683 struct ceph_mds_client
*mdsc
=
1684 ceph_sb_to_client(ci
->vfs_inode
.i_sb
)->mdsc
;
1685 struct inode
*inode
= &ci
->vfs_inode
;
1686 int was
= ci
->i_dirty_caps
;
1689 lockdep_assert_held(&ci
->i_ceph_lock
);
1691 if (!ci
->i_auth_cap
) {
1692 pr_warn("__mark_dirty_caps %p %llx mask %s, "
1693 "but no auth cap (session was closed?)\n",
1694 inode
, ceph_ino(inode
), ceph_cap_string(mask
));
1698 dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci
->vfs_inode
,
1699 ceph_cap_string(mask
), ceph_cap_string(was
),
1700 ceph_cap_string(was
| mask
));
1701 ci
->i_dirty_caps
|= mask
;
1703 struct ceph_mds_session
*session
= ci
->i_auth_cap
->session
;
1705 WARN_ON_ONCE(ci
->i_prealloc_cap_flush
);
1706 swap(ci
->i_prealloc_cap_flush
, *pcf
);
1708 if (!ci
->i_head_snapc
) {
1709 WARN_ON_ONCE(!rwsem_is_locked(&mdsc
->snap_rwsem
));
1710 ci
->i_head_snapc
= ceph_get_snap_context(
1711 ci
->i_snap_realm
->cached_context
);
1713 dout(" inode %p now dirty snapc %p auth cap %p\n",
1714 &ci
->vfs_inode
, ci
->i_head_snapc
, ci
->i_auth_cap
);
1715 BUG_ON(!list_empty(&ci
->i_dirty_item
));
1716 spin_lock(&mdsc
->cap_dirty_lock
);
1717 list_add(&ci
->i_dirty_item
, &session
->s_cap_dirty
);
1718 spin_unlock(&mdsc
->cap_dirty_lock
);
1719 if (ci
->i_flushing_caps
== 0) {
1721 dirty
|= I_DIRTY_SYNC
;
1724 WARN_ON_ONCE(!ci
->i_prealloc_cap_flush
);
1726 BUG_ON(list_empty(&ci
->i_dirty_item
));
1727 if (((was
| ci
->i_flushing_caps
) & CEPH_CAP_FILE_BUFFER
) &&
1728 (mask
& CEPH_CAP_FILE_BUFFER
))
1729 dirty
|= I_DIRTY_DATASYNC
;
1730 __cap_delay_requeue(mdsc
, ci
);
1734 struct ceph_cap_flush
*ceph_alloc_cap_flush(void)
1736 struct ceph_cap_flush
*cf
;
1738 cf
= kmem_cache_alloc(ceph_cap_flush_cachep
, GFP_KERNEL
);
1742 cf
->is_capsnap
= false;
1746 void ceph_free_cap_flush(struct ceph_cap_flush
*cf
)
1749 kmem_cache_free(ceph_cap_flush_cachep
, cf
);
1752 static u64
__get_oldest_flush_tid(struct ceph_mds_client
*mdsc
)
1754 if (!list_empty(&mdsc
->cap_flush_list
)) {
1755 struct ceph_cap_flush
*cf
=
1756 list_first_entry(&mdsc
->cap_flush_list
,
1757 struct ceph_cap_flush
, g_list
);
1764 * Remove cap_flush from the mdsc's or inode's flushing cap list.
1765 * Return true if caller needs to wake up flush waiters.
1767 static bool __detach_cap_flush_from_mdsc(struct ceph_mds_client
*mdsc
,
1768 struct ceph_cap_flush
*cf
)
1770 struct ceph_cap_flush
*prev
;
1771 bool wake
= cf
->wake
;
1773 if (wake
&& cf
->g_list
.prev
!= &mdsc
->cap_flush_list
) {
1774 prev
= list_prev_entry(cf
, g_list
);
1778 list_del_init(&cf
->g_list
);
1782 static bool __detach_cap_flush_from_ci(struct ceph_inode_info
*ci
,
1783 struct ceph_cap_flush
*cf
)
1785 struct ceph_cap_flush
*prev
;
1786 bool wake
= cf
->wake
;
1788 if (wake
&& cf
->i_list
.prev
!= &ci
->i_cap_flush_list
) {
1789 prev
= list_prev_entry(cf
, i_list
);
1793 list_del_init(&cf
->i_list
);
1798 * Add dirty inode to the flushing list. Assigned a seq number so we
1799 * can wait for caps to flush without starving.
1801 * Called under i_ceph_lock. Returns the flush tid.
1803 static u64
__mark_caps_flushing(struct inode
*inode
,
1804 struct ceph_mds_session
*session
, bool wake
,
1805 u64
*oldest_flush_tid
)
1807 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
1808 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1809 struct ceph_cap_flush
*cf
= NULL
;
1812 lockdep_assert_held(&ci
->i_ceph_lock
);
1813 BUG_ON(ci
->i_dirty_caps
== 0);
1814 BUG_ON(list_empty(&ci
->i_dirty_item
));
1815 BUG_ON(!ci
->i_prealloc_cap_flush
);
1817 flushing
= ci
->i_dirty_caps
;
1818 dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n",
1819 ceph_cap_string(flushing
),
1820 ceph_cap_string(ci
->i_flushing_caps
),
1821 ceph_cap_string(ci
->i_flushing_caps
| flushing
));
1822 ci
->i_flushing_caps
|= flushing
;
1823 ci
->i_dirty_caps
= 0;
1824 dout(" inode %p now !dirty\n", inode
);
1826 swap(cf
, ci
->i_prealloc_cap_flush
);
1827 cf
->caps
= flushing
;
1830 spin_lock(&mdsc
->cap_dirty_lock
);
1831 list_del_init(&ci
->i_dirty_item
);
1833 cf
->tid
= ++mdsc
->last_cap_flush_tid
;
1834 list_add_tail(&cf
->g_list
, &mdsc
->cap_flush_list
);
1835 *oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
1837 if (list_empty(&ci
->i_flushing_item
)) {
1838 list_add_tail(&ci
->i_flushing_item
, &session
->s_cap_flushing
);
1839 mdsc
->num_cap_flushing
++;
1841 spin_unlock(&mdsc
->cap_dirty_lock
);
1843 list_add_tail(&cf
->i_list
, &ci
->i_cap_flush_list
);
1849 * try to invalidate mapping pages without blocking.
1851 static int try_nonblocking_invalidate(struct inode
*inode
)
1852 __releases(ci
->i_ceph_lock
)
1853 __acquires(ci
->i_ceph_lock
)
1855 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1856 u32 invalidating_gen
= ci
->i_rdcache_gen
;
1858 spin_unlock(&ci
->i_ceph_lock
);
1859 ceph_fscache_invalidate(inode
);
1860 invalidate_mapping_pages(&inode
->i_data
, 0, -1);
1861 spin_lock(&ci
->i_ceph_lock
);
1863 if (inode
->i_data
.nrpages
== 0 &&
1864 invalidating_gen
== ci
->i_rdcache_gen
) {
1866 dout("try_nonblocking_invalidate %p success\n", inode
);
1867 /* save any racing async invalidate some trouble */
1868 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
- 1;
1871 dout("try_nonblocking_invalidate %p failed\n", inode
);
1875 bool __ceph_should_report_size(struct ceph_inode_info
*ci
)
1877 loff_t size
= i_size_read(&ci
->vfs_inode
);
1878 /* mds will adjust max size according to the reported size */
1879 if (ci
->i_flushing_caps
& CEPH_CAP_FILE_WR
)
1881 if (size
>= ci
->i_max_size
)
1883 /* half of previous max_size increment has been used */
1884 if (ci
->i_max_size
> ci
->i_reported_size
&&
1885 (size
<< 1) >= ci
->i_max_size
+ ci
->i_reported_size
)
1891 * Swiss army knife function to examine currently used and wanted
1892 * versus held caps. Release, flush, ack revoked caps to mds as
1895 * CHECK_CAPS_AUTHONLY - we should only check the auth cap
1896 * CHECK_CAPS_FLUSH - we should flush any dirty caps immediately, without
1899 void ceph_check_caps(struct ceph_inode_info
*ci
, int flags
,
1900 struct ceph_mds_session
*session
)
1902 struct inode
*inode
= &ci
->vfs_inode
;
1903 struct ceph_mds_client
*mdsc
= ceph_sb_to_mdsc(inode
->i_sb
);
1904 struct ceph_cap
*cap
;
1905 u64 flush_tid
, oldest_flush_tid
;
1906 int file_wanted
, used
, cap_used
;
1907 int issued
, implemented
, want
, retain
, revoking
, flushing
= 0;
1908 int mds
= -1; /* keep track of how far we've gone through i_caps list
1909 to avoid an infinite loop on retry */
1911 bool queue_invalidate
= false;
1912 bool tried_invalidate
= false;
1915 ceph_get_mds_session(session
);
1917 spin_lock(&ci
->i_ceph_lock
);
1918 if (ci
->i_ceph_flags
& CEPH_I_FLUSH
)
1919 flags
|= CHECK_CAPS_FLUSH
;
1921 /* Caps wanted by virtue of active open files. */
1922 file_wanted
= __ceph_caps_file_wanted(ci
);
1924 /* Caps which have active references against them */
1925 used
= __ceph_caps_used(ci
);
1928 * "issued" represents the current caps that the MDS wants us to have.
1929 * "implemented" is the set that we have been granted, and includes the
1930 * ones that have not yet been returned to the MDS (the "revoking" set,
1931 * usually because they have outstanding references).
1933 issued
= __ceph_caps_issued(ci
, &implemented
);
1934 revoking
= implemented
& ~issued
;
1938 /* The ones we currently want to retain (may be adjusted below) */
1939 retain
= file_wanted
| used
| CEPH_CAP_PIN
;
1940 if (!mdsc
->stopping
&& inode
->i_nlink
> 0) {
1942 retain
|= CEPH_CAP_ANY
; /* be greedy */
1943 } else if (S_ISDIR(inode
->i_mode
) &&
1944 (issued
& CEPH_CAP_FILE_SHARED
) &&
1945 __ceph_dir_is_complete(ci
)) {
1947 * If a directory is complete, we want to keep
1948 * the exclusive cap. So that MDS does not end up
1949 * revoking the shared cap on every create/unlink
1952 if (IS_RDONLY(inode
)) {
1953 want
= CEPH_CAP_ANY_SHARED
;
1955 want
|= CEPH_CAP_ANY_SHARED
| CEPH_CAP_FILE_EXCL
;
1960 retain
|= CEPH_CAP_ANY_SHARED
;
1962 * keep RD only if we didn't have the file open RW,
1963 * because then the mds would revoke it anyway to
1964 * journal max_size=0.
1966 if (ci
->i_max_size
== 0)
1967 retain
|= CEPH_CAP_ANY_RD
;
1971 dout("check_caps %p file_want %s used %s dirty %s flushing %s"
1972 " issued %s revoking %s retain %s %s%s\n", inode
,
1973 ceph_cap_string(file_wanted
),
1974 ceph_cap_string(used
), ceph_cap_string(ci
->i_dirty_caps
),
1975 ceph_cap_string(ci
->i_flushing_caps
),
1976 ceph_cap_string(issued
), ceph_cap_string(revoking
),
1977 ceph_cap_string(retain
),
1978 (flags
& CHECK_CAPS_AUTHONLY
) ? " AUTHONLY" : "",
1979 (flags
& CHECK_CAPS_FLUSH
) ? " FLUSH" : "");
1982 * If we no longer need to hold onto old our caps, and we may
1983 * have cached pages, but don't want them, then try to invalidate.
1984 * If we fail, it's because pages are locked.... try again later.
1986 if ((!(flags
& CHECK_CAPS_NOINVAL
) || mdsc
->stopping
) &&
1987 S_ISREG(inode
->i_mode
) &&
1988 !(ci
->i_wb_ref
|| ci
->i_wrbuffer_ref
) && /* no dirty pages... */
1989 inode
->i_data
.nrpages
&& /* have cached pages */
1990 (revoking
& (CEPH_CAP_FILE_CACHE
|
1991 CEPH_CAP_FILE_LAZYIO
)) && /* or revoking cache */
1992 !tried_invalidate
) {
1993 dout("check_caps trying to invalidate on %p\n", inode
);
1994 if (try_nonblocking_invalidate(inode
) < 0) {
1995 dout("check_caps queuing invalidate\n");
1996 queue_invalidate
= true;
1997 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
1999 tried_invalidate
= true;
2003 for (p
= rb_first(&ci
->i_caps
); p
; p
= rb_next(p
)) {
2005 struct cap_msg_args arg
;
2007 cap
= rb_entry(p
, struct ceph_cap
, ci_node
);
2009 /* avoid looping forever */
2010 if (mds
>= cap
->mds
||
2011 ((flags
& CHECK_CAPS_AUTHONLY
) && cap
!= ci
->i_auth_cap
))
2015 * If we have an auth cap, we don't need to consider any
2016 * overlapping caps as used.
2019 if (ci
->i_auth_cap
&& cap
!= ci
->i_auth_cap
)
2020 cap_used
&= ~ci
->i_auth_cap
->issued
;
2022 revoking
= cap
->implemented
& ~cap
->issued
;
2023 dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n",
2024 cap
->mds
, cap
, ceph_cap_string(cap_used
),
2025 ceph_cap_string(cap
->issued
),
2026 ceph_cap_string(cap
->implemented
),
2027 ceph_cap_string(revoking
));
2029 if (cap
== ci
->i_auth_cap
&&
2030 (cap
->issued
& CEPH_CAP_FILE_WR
)) {
2031 /* request larger max_size from MDS? */
2032 if (ci
->i_wanted_max_size
> ci
->i_max_size
&&
2033 ci
->i_wanted_max_size
> ci
->i_requested_max_size
) {
2034 dout("requesting new max_size\n");
2038 /* approaching file_max? */
2039 if (__ceph_should_report_size(ci
)) {
2040 dout("i_size approaching max_size\n");
2044 /* flush anything dirty? */
2045 if (cap
== ci
->i_auth_cap
) {
2046 if ((flags
& CHECK_CAPS_FLUSH
) && ci
->i_dirty_caps
) {
2047 dout("flushing dirty caps\n");
2050 if (ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
) {
2051 dout("flushing snap caps\n");
2056 /* completed revocation? going down and there are no caps? */
2057 if (revoking
&& (revoking
& cap_used
) == 0) {
2058 dout("completed revocation of %s\n",
2059 ceph_cap_string(cap
->implemented
& ~cap
->issued
));
2063 /* want more caps from mds? */
2064 if (want
& ~cap
->mds_wanted
) {
2065 if (want
& ~(cap
->mds_wanted
| cap
->issued
))
2067 if (!__cap_is_valid(cap
))
2071 /* things we might delay */
2072 if ((cap
->issued
& ~retain
) == 0)
2073 continue; /* nope, all good */
2076 ceph_put_mds_session(session
);
2077 session
= ceph_get_mds_session(cap
->session
);
2079 /* kick flushing and flush snaps before sending normal
2081 if (cap
== ci
->i_auth_cap
&&
2083 (CEPH_I_KICK_FLUSH
| CEPH_I_FLUSH_SNAPS
))) {
2084 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
)
2085 __kick_flushing_caps(mdsc
, session
, ci
, 0);
2086 if (ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
)
2087 __ceph_flush_snaps(ci
, session
);
2092 if (cap
== ci
->i_auth_cap
&& ci
->i_dirty_caps
) {
2093 flushing
= ci
->i_dirty_caps
;
2094 flush_tid
= __mark_caps_flushing(inode
, session
, false,
2096 if (flags
& CHECK_CAPS_FLUSH
&&
2097 list_empty(&session
->s_cap_dirty
))
2098 mflags
|= CEPH_CLIENT_CAPS_SYNC
;
2102 spin_lock(&mdsc
->cap_dirty_lock
);
2103 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2104 spin_unlock(&mdsc
->cap_dirty_lock
);
2107 mds
= cap
->mds
; /* remember mds, so we don't repeat */
2109 __prep_cap(&arg
, cap
, CEPH_CAP_OP_UPDATE
, mflags
, cap_used
,
2110 want
, retain
, flushing
, flush_tid
, oldest_flush_tid
);
2112 spin_unlock(&ci
->i_ceph_lock
);
2113 __send_cap(&arg
, ci
);
2114 spin_lock(&ci
->i_ceph_lock
);
2116 goto retry
; /* retake i_ceph_lock and restart our cap scan. */
2119 /* periodically re-calculate caps wanted by open files */
2120 if (__ceph_is_any_real_caps(ci
) &&
2121 list_empty(&ci
->i_cap_delay_list
) &&
2122 (file_wanted
& ~CEPH_CAP_PIN
) &&
2123 !(used
& (CEPH_CAP_FILE_RD
| CEPH_CAP_ANY_FILE_WR
))) {
2124 __cap_delay_requeue(mdsc
, ci
);
2127 spin_unlock(&ci
->i_ceph_lock
);
2129 ceph_put_mds_session(session
);
2130 if (queue_invalidate
)
2131 ceph_queue_invalidate(inode
);
2135 * Try to flush dirty caps back to the auth mds.
2137 static int try_flush_caps(struct inode
*inode
, u64
*ptid
)
2139 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2140 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2142 u64 flush_tid
= 0, oldest_flush_tid
= 0;
2144 spin_lock(&ci
->i_ceph_lock
);
2146 if (ci
->i_dirty_caps
&& ci
->i_auth_cap
) {
2147 struct ceph_cap
*cap
= ci
->i_auth_cap
;
2148 struct cap_msg_args arg
;
2149 struct ceph_mds_session
*session
= cap
->session
;
2151 if (session
->s_state
< CEPH_MDS_SESSION_OPEN
) {
2152 spin_unlock(&ci
->i_ceph_lock
);
2156 if (ci
->i_ceph_flags
&
2157 (CEPH_I_KICK_FLUSH
| CEPH_I_FLUSH_SNAPS
)) {
2158 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
)
2159 __kick_flushing_caps(mdsc
, session
, ci
, 0);
2160 if (ci
->i_ceph_flags
& CEPH_I_FLUSH_SNAPS
)
2161 __ceph_flush_snaps(ci
, session
);
2165 flushing
= ci
->i_dirty_caps
;
2166 flush_tid
= __mark_caps_flushing(inode
, session
, true,
2169 __prep_cap(&arg
, cap
, CEPH_CAP_OP_FLUSH
, CEPH_CLIENT_CAPS_SYNC
,
2170 __ceph_caps_used(ci
), __ceph_caps_wanted(ci
),
2171 (cap
->issued
| cap
->implemented
),
2172 flushing
, flush_tid
, oldest_flush_tid
);
2173 spin_unlock(&ci
->i_ceph_lock
);
2175 __send_cap(&arg
, ci
);
2177 if (!list_empty(&ci
->i_cap_flush_list
)) {
2178 struct ceph_cap_flush
*cf
=
2179 list_last_entry(&ci
->i_cap_flush_list
,
2180 struct ceph_cap_flush
, i_list
);
2182 flush_tid
= cf
->tid
;
2184 flushing
= ci
->i_flushing_caps
;
2185 spin_unlock(&ci
->i_ceph_lock
);
2193 * Return true if we've flushed caps through the given flush_tid.
2195 static int caps_are_flushed(struct inode
*inode
, u64 flush_tid
)
2197 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2200 spin_lock(&ci
->i_ceph_lock
);
2201 if (!list_empty(&ci
->i_cap_flush_list
)) {
2202 struct ceph_cap_flush
* cf
=
2203 list_first_entry(&ci
->i_cap_flush_list
,
2204 struct ceph_cap_flush
, i_list
);
2205 if (cf
->tid
<= flush_tid
)
2208 spin_unlock(&ci
->i_ceph_lock
);
2213 * wait for any unsafe requests to complete.
2215 static int unsafe_request_wait(struct inode
*inode
)
2217 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2218 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2219 struct ceph_mds_request
*req1
= NULL
, *req2
= NULL
;
2222 spin_lock(&ci
->i_unsafe_lock
);
2223 if (S_ISDIR(inode
->i_mode
) && !list_empty(&ci
->i_unsafe_dirops
)) {
2224 req1
= list_last_entry(&ci
->i_unsafe_dirops
,
2225 struct ceph_mds_request
,
2227 ceph_mdsc_get_request(req1
);
2229 if (!list_empty(&ci
->i_unsafe_iops
)) {
2230 req2
= list_last_entry(&ci
->i_unsafe_iops
,
2231 struct ceph_mds_request
,
2232 r_unsafe_target_item
);
2233 ceph_mdsc_get_request(req2
);
2235 spin_unlock(&ci
->i_unsafe_lock
);
2238 * Trigger to flush the journal logs in all the relevant MDSes
2239 * manually, or in the worst case we must wait at most 5 seconds
2240 * to wait the journal logs to be flushed by the MDSes periodically.
2243 struct ceph_mds_session
**sessions
= NULL
;
2244 struct ceph_mds_session
*s
;
2245 struct ceph_mds_request
*req
;
2250 * The mdsc->max_sessions is unlikely to be changed
2251 * mostly, here we will retry it by reallocating the
2252 * sessions arrary memory to get rid of the mdsc->mutex
2256 max
= mdsc
->max_sessions
;
2257 sessions
= krealloc(sessions
, max
* sizeof(s
), __GFP_ZERO
);
2261 spin_lock(&ci
->i_unsafe_lock
);
2263 list_for_each_entry(req
, &ci
->i_unsafe_dirops
,
2264 r_unsafe_dir_item
) {
2266 if (unlikely(s
->s_mds
>= max
)) {
2267 spin_unlock(&ci
->i_unsafe_lock
);
2270 if (!sessions
[s
->s_mds
]) {
2271 s
= ceph_get_mds_session(s
);
2272 sessions
[s
->s_mds
] = s
;
2277 list_for_each_entry(req
, &ci
->i_unsafe_iops
,
2278 r_unsafe_target_item
) {
2280 if (unlikely(s
->s_mds
>= max
)) {
2281 spin_unlock(&ci
->i_unsafe_lock
);
2284 if (!sessions
[s
->s_mds
]) {
2285 s
= ceph_get_mds_session(s
);
2286 sessions
[s
->s_mds
] = s
;
2290 spin_unlock(&ci
->i_unsafe_lock
);
2293 spin_lock(&ci
->i_ceph_lock
);
2294 if (ci
->i_auth_cap
) {
2295 s
= ci
->i_auth_cap
->session
;
2296 if (!sessions
[s
->s_mds
])
2297 sessions
[s
->s_mds
] = ceph_get_mds_session(s
);
2299 spin_unlock(&ci
->i_ceph_lock
);
2301 /* send flush mdlog request to MDSes */
2302 for (i
= 0; i
< max
; i
++) {
2305 send_flush_mdlog(s
);
2306 ceph_put_mds_session(s
);
2312 dout("unsafe_request_wait %p wait on tid %llu %llu\n",
2313 inode
, req1
? req1
->r_tid
: 0ULL, req2
? req2
->r_tid
: 0ULL);
2315 ret
= !wait_for_completion_timeout(&req1
->r_safe_completion
,
2316 ceph_timeout_jiffies(req1
->r_timeout
));
2319 ceph_mdsc_put_request(req1
);
2322 ret
= !wait_for_completion_timeout(&req2
->r_safe_completion
,
2323 ceph_timeout_jiffies(req2
->r_timeout
));
2326 ceph_mdsc_put_request(req2
);
2331 int ceph_fsync(struct file
*file
, loff_t start
, loff_t end
, int datasync
)
2333 struct inode
*inode
= file
->f_mapping
->host
;
2334 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2339 dout("fsync %p%s\n", inode
, datasync
? " datasync" : "");
2341 ret
= file_write_and_wait_range(file
, start
, end
);
2345 ret
= ceph_wait_on_async_create(inode
);
2349 dirty
= try_flush_caps(inode
, &flush_tid
);
2350 dout("fsync dirty caps are %s\n", ceph_cap_string(dirty
));
2352 err
= unsafe_request_wait(inode
);
2355 * only wait on non-file metadata writeback (the mds
2356 * can recover size and mtime, so we don't need to
2359 if (!err
&& (dirty
& ~CEPH_CAP_ANY_FILE_WR
)) {
2360 err
= wait_event_interruptible(ci
->i_cap_wq
,
2361 caps_are_flushed(inode
, flush_tid
));
2367 err
= file_check_and_advance_wb_err(file
);
2371 dout("fsync %p%s result=%d\n", inode
, datasync
? " datasync" : "", ret
);
2376 * Flush any dirty caps back to the mds. If we aren't asked to wait,
2377 * queue inode for flush but don't do so immediately, because we can
2378 * get by with fewer MDS messages if we wait for data writeback to
2381 int ceph_write_inode(struct inode
*inode
, struct writeback_control
*wbc
)
2383 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2387 int wait
= (wbc
->sync_mode
== WB_SYNC_ALL
&& !wbc
->for_sync
);
2389 dout("write_inode %p wait=%d\n", inode
, wait
);
2391 dirty
= try_flush_caps(inode
, &flush_tid
);
2393 err
= wait_event_interruptible(ci
->i_cap_wq
,
2394 caps_are_flushed(inode
, flush_tid
));
2396 struct ceph_mds_client
*mdsc
=
2397 ceph_sb_to_client(inode
->i_sb
)->mdsc
;
2399 spin_lock(&ci
->i_ceph_lock
);
2400 if (__ceph_caps_dirty(ci
))
2401 __cap_delay_requeue_front(mdsc
, ci
);
2402 spin_unlock(&ci
->i_ceph_lock
);
2407 static void __kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2408 struct ceph_mds_session
*session
,
2409 struct ceph_inode_info
*ci
,
2410 u64 oldest_flush_tid
)
2411 __releases(ci
->i_ceph_lock
)
2412 __acquires(ci
->i_ceph_lock
)
2414 struct inode
*inode
= &ci
->vfs_inode
;
2415 struct ceph_cap
*cap
;
2416 struct ceph_cap_flush
*cf
;
2419 u64 last_snap_flush
= 0;
2421 ci
->i_ceph_flags
&= ~CEPH_I_KICK_FLUSH
;
2423 list_for_each_entry_reverse(cf
, &ci
->i_cap_flush_list
, i_list
) {
2424 if (cf
->is_capsnap
) {
2425 last_snap_flush
= cf
->tid
;
2430 list_for_each_entry(cf
, &ci
->i_cap_flush_list
, i_list
) {
2431 if (cf
->tid
< first_tid
)
2434 cap
= ci
->i_auth_cap
;
2435 if (!(cap
&& cap
->session
== session
)) {
2436 pr_err("%p auth cap %p not mds%d ???\n",
2437 inode
, cap
, session
->s_mds
);
2441 first_tid
= cf
->tid
+ 1;
2443 if (!cf
->is_capsnap
) {
2444 struct cap_msg_args arg
;
2446 dout("kick_flushing_caps %p cap %p tid %llu %s\n",
2447 inode
, cap
, cf
->tid
, ceph_cap_string(cf
->caps
));
2448 __prep_cap(&arg
, cap
, CEPH_CAP_OP_FLUSH
,
2449 (cf
->tid
< last_snap_flush
?
2450 CEPH_CLIENT_CAPS_PENDING_CAPSNAP
: 0),
2451 __ceph_caps_used(ci
),
2452 __ceph_caps_wanted(ci
),
2453 (cap
->issued
| cap
->implemented
),
2454 cf
->caps
, cf
->tid
, oldest_flush_tid
);
2455 spin_unlock(&ci
->i_ceph_lock
);
2456 __send_cap(&arg
, ci
);
2458 struct ceph_cap_snap
*capsnap
=
2459 container_of(cf
, struct ceph_cap_snap
,
2461 dout("kick_flushing_caps %p capsnap %p tid %llu %s\n",
2462 inode
, capsnap
, cf
->tid
,
2463 ceph_cap_string(capsnap
->dirty
));
2465 refcount_inc(&capsnap
->nref
);
2466 spin_unlock(&ci
->i_ceph_lock
);
2468 ret
= __send_flush_snap(inode
, session
, capsnap
, cap
->mseq
,
2471 pr_err("kick_flushing_caps: error sending "
2472 "cap flushsnap, ino (%llx.%llx) "
2473 "tid %llu follows %llu\n",
2474 ceph_vinop(inode
), cf
->tid
,
2478 ceph_put_cap_snap(capsnap
);
2481 spin_lock(&ci
->i_ceph_lock
);
2485 void ceph_early_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2486 struct ceph_mds_session
*session
)
2488 struct ceph_inode_info
*ci
;
2489 struct ceph_cap
*cap
;
2490 u64 oldest_flush_tid
;
2492 dout("early_kick_flushing_caps mds%d\n", session
->s_mds
);
2494 spin_lock(&mdsc
->cap_dirty_lock
);
2495 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2496 spin_unlock(&mdsc
->cap_dirty_lock
);
2498 list_for_each_entry(ci
, &session
->s_cap_flushing
, i_flushing_item
) {
2499 spin_lock(&ci
->i_ceph_lock
);
2500 cap
= ci
->i_auth_cap
;
2501 if (!(cap
&& cap
->session
== session
)) {
2502 pr_err("%p auth cap %p not mds%d ???\n",
2503 &ci
->vfs_inode
, cap
, session
->s_mds
);
2504 spin_unlock(&ci
->i_ceph_lock
);
2510 * if flushing caps were revoked, we re-send the cap flush
2511 * in client reconnect stage. This guarantees MDS * processes
2512 * the cap flush message before issuing the flushing caps to
2515 if ((cap
->issued
& ci
->i_flushing_caps
) !=
2516 ci
->i_flushing_caps
) {
2517 /* encode_caps_cb() also will reset these sequence
2518 * numbers. make sure sequence numbers in cap flush
2519 * message match later reconnect message */
2523 __kick_flushing_caps(mdsc
, session
, ci
,
2526 ci
->i_ceph_flags
|= CEPH_I_KICK_FLUSH
;
2529 spin_unlock(&ci
->i_ceph_lock
);
2533 void ceph_kick_flushing_caps(struct ceph_mds_client
*mdsc
,
2534 struct ceph_mds_session
*session
)
2536 struct ceph_inode_info
*ci
;
2537 struct ceph_cap
*cap
;
2538 u64 oldest_flush_tid
;
2540 lockdep_assert_held(&session
->s_mutex
);
2542 dout("kick_flushing_caps mds%d\n", session
->s_mds
);
2544 spin_lock(&mdsc
->cap_dirty_lock
);
2545 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2546 spin_unlock(&mdsc
->cap_dirty_lock
);
2548 list_for_each_entry(ci
, &session
->s_cap_flushing
, i_flushing_item
) {
2549 spin_lock(&ci
->i_ceph_lock
);
2550 cap
= ci
->i_auth_cap
;
2551 if (!(cap
&& cap
->session
== session
)) {
2552 pr_err("%p auth cap %p not mds%d ???\n",
2553 &ci
->vfs_inode
, cap
, session
->s_mds
);
2554 spin_unlock(&ci
->i_ceph_lock
);
2557 if (ci
->i_ceph_flags
& CEPH_I_KICK_FLUSH
) {
2558 __kick_flushing_caps(mdsc
, session
, ci
,
2561 spin_unlock(&ci
->i_ceph_lock
);
2565 void ceph_kick_flushing_inode_caps(struct ceph_mds_session
*session
,
2566 struct ceph_inode_info
*ci
)
2568 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
2569 struct ceph_cap
*cap
= ci
->i_auth_cap
;
2571 lockdep_assert_held(&ci
->i_ceph_lock
);
2573 dout("%s %p flushing %s\n", __func__
, &ci
->vfs_inode
,
2574 ceph_cap_string(ci
->i_flushing_caps
));
2576 if (!list_empty(&ci
->i_cap_flush_list
)) {
2577 u64 oldest_flush_tid
;
2578 spin_lock(&mdsc
->cap_dirty_lock
);
2579 list_move_tail(&ci
->i_flushing_item
,
2580 &cap
->session
->s_cap_flushing
);
2581 oldest_flush_tid
= __get_oldest_flush_tid(mdsc
);
2582 spin_unlock(&mdsc
->cap_dirty_lock
);
2584 __kick_flushing_caps(mdsc
, session
, ci
, oldest_flush_tid
);
2590 * Take references to capabilities we hold, so that we don't release
2591 * them to the MDS prematurely.
2593 void ceph_take_cap_refs(struct ceph_inode_info
*ci
, int got
,
2594 bool snap_rwsem_locked
)
2596 lockdep_assert_held(&ci
->i_ceph_lock
);
2598 if (got
& CEPH_CAP_PIN
)
2600 if (got
& CEPH_CAP_FILE_RD
)
2602 if (got
& CEPH_CAP_FILE_CACHE
)
2603 ci
->i_rdcache_ref
++;
2604 if (got
& CEPH_CAP_FILE_EXCL
)
2606 if (got
& CEPH_CAP_FILE_WR
) {
2607 if (ci
->i_wr_ref
== 0 && !ci
->i_head_snapc
) {
2608 BUG_ON(!snap_rwsem_locked
);
2609 ci
->i_head_snapc
= ceph_get_snap_context(
2610 ci
->i_snap_realm
->cached_context
);
2614 if (got
& CEPH_CAP_FILE_BUFFER
) {
2615 if (ci
->i_wb_ref
== 0)
2616 ihold(&ci
->vfs_inode
);
2618 dout("%s %p wb %d -> %d (?)\n", __func__
,
2619 &ci
->vfs_inode
, ci
->i_wb_ref
-1, ci
->i_wb_ref
);
2624 * Try to grab cap references. Specify those refs we @want, and the
2625 * minimal set we @need. Also include the larger offset we are writing
2626 * to (when applicable), and check against max_size here as well.
2627 * Note that caller is responsible for ensuring max_size increases are
2628 * requested from the MDS.
2630 * Returns 0 if caps were not able to be acquired (yet), 1 if succeed,
2631 * or a negative error code. There are 3 speical error codes:
2632 * -EAGAIN: need to sleep but non-blocking is specified
2633 * -EFBIG: ask caller to call check_max_size() and try again.
2634 * -ESTALE: ask caller to call ceph_renew_caps() and try again.
2637 /* first 8 bits are reserved for CEPH_FILE_MODE_FOO */
2638 NON_BLOCKING
= (1 << 8),
2639 CHECK_FILELOCK
= (1 << 9),
2642 static int try_get_cap_refs(struct inode
*inode
, int need
, int want
,
2643 loff_t endoff
, int flags
, int *got
)
2645 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2646 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
2648 int have
, implemented
;
2649 bool snap_rwsem_locked
= false;
2651 dout("get_cap_refs %p need %s want %s\n", inode
,
2652 ceph_cap_string(need
), ceph_cap_string(want
));
2655 spin_lock(&ci
->i_ceph_lock
);
2657 if ((flags
& CHECK_FILELOCK
) &&
2658 (ci
->i_ceph_flags
& CEPH_I_ERROR_FILELOCK
)) {
2659 dout("try_get_cap_refs %p error filelock\n", inode
);
2664 /* finish pending truncate */
2665 while (ci
->i_truncate_pending
) {
2666 spin_unlock(&ci
->i_ceph_lock
);
2667 if (snap_rwsem_locked
) {
2668 up_read(&mdsc
->snap_rwsem
);
2669 snap_rwsem_locked
= false;
2671 __ceph_do_pending_vmtruncate(inode
);
2672 spin_lock(&ci
->i_ceph_lock
);
2675 have
= __ceph_caps_issued(ci
, &implemented
);
2677 if (have
& need
& CEPH_CAP_FILE_WR
) {
2678 if (endoff
>= 0 && endoff
> (loff_t
)ci
->i_max_size
) {
2679 dout("get_cap_refs %p endoff %llu > maxsize %llu\n",
2680 inode
, endoff
, ci
->i_max_size
);
2681 if (endoff
> ci
->i_requested_max_size
)
2682 ret
= ci
->i_auth_cap
? -EFBIG
: -ESTALE
;
2686 * If a sync write is in progress, we must wait, so that we
2687 * can get a final snapshot value for size+mtime.
2689 if (__ceph_have_pending_cap_snap(ci
)) {
2690 dout("get_cap_refs %p cap_snap_pending\n", inode
);
2695 if ((have
& need
) == need
) {
2697 * Look at (implemented & ~have & not) so that we keep waiting
2698 * on transition from wanted -> needed caps. This is needed
2699 * for WRBUFFER|WR -> WR to avoid a new WR sync write from
2700 * going before a prior buffered writeback happens.
2702 int not = want
& ~(have
& need
);
2703 int revoking
= implemented
& ~have
;
2704 dout("get_cap_refs %p have %s but not %s (revoking %s)\n",
2705 inode
, ceph_cap_string(have
), ceph_cap_string(not),
2706 ceph_cap_string(revoking
));
2707 if ((revoking
& not) == 0) {
2708 if (!snap_rwsem_locked
&&
2709 !ci
->i_head_snapc
&&
2710 (need
& CEPH_CAP_FILE_WR
)) {
2711 if (!down_read_trylock(&mdsc
->snap_rwsem
)) {
2713 * we can not call down_read() when
2714 * task isn't in TASK_RUNNING state
2716 if (flags
& NON_BLOCKING
) {
2721 spin_unlock(&ci
->i_ceph_lock
);
2722 down_read(&mdsc
->snap_rwsem
);
2723 snap_rwsem_locked
= true;
2726 snap_rwsem_locked
= true;
2728 if ((have
& want
) == want
)
2732 ceph_take_cap_refs(ci
, *got
, true);
2736 int session_readonly
= false;
2738 if (ci
->i_auth_cap
&&
2739 (need
& (CEPH_CAP_FILE_WR
| CEPH_CAP_FILE_EXCL
))) {
2740 struct ceph_mds_session
*s
= ci
->i_auth_cap
->session
;
2741 spin_lock(&s
->s_cap_lock
);
2742 session_readonly
= s
->s_readonly
;
2743 spin_unlock(&s
->s_cap_lock
);
2745 if (session_readonly
) {
2746 dout("get_cap_refs %p need %s but mds%d readonly\n",
2747 inode
, ceph_cap_string(need
), ci
->i_auth_cap
->mds
);
2752 if (READ_ONCE(mdsc
->fsc
->mount_state
) >= CEPH_MOUNT_SHUTDOWN
) {
2753 dout("get_cap_refs %p forced umount\n", inode
);
2757 mds_wanted
= __ceph_caps_mds_wanted(ci
, false);
2758 if (need
& ~mds_wanted
) {
2759 dout("get_cap_refs %p need %s > mds_wanted %s\n",
2760 inode
, ceph_cap_string(need
),
2761 ceph_cap_string(mds_wanted
));
2766 dout("get_cap_refs %p have %s need %s\n", inode
,
2767 ceph_cap_string(have
), ceph_cap_string(need
));
2771 __ceph_touch_fmode(ci
, mdsc
, flags
);
2773 spin_unlock(&ci
->i_ceph_lock
);
2774 if (snap_rwsem_locked
)
2775 up_read(&mdsc
->snap_rwsem
);
2778 ceph_update_cap_mis(&mdsc
->metric
);
2780 ceph_update_cap_hit(&mdsc
->metric
);
2782 dout("get_cap_refs %p ret %d got %s\n", inode
,
2783 ret
, ceph_cap_string(*got
));
2788 * Check the offset we are writing up to against our current
2789 * max_size. If necessary, tell the MDS we want to write to
2792 static void check_max_size(struct inode
*inode
, loff_t endoff
)
2794 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2797 /* do we need to explicitly request a larger max_size? */
2798 spin_lock(&ci
->i_ceph_lock
);
2799 if (endoff
>= ci
->i_max_size
&& endoff
> ci
->i_wanted_max_size
) {
2800 dout("write %p at large endoff %llu, req max_size\n",
2802 ci
->i_wanted_max_size
= endoff
;
2804 /* duplicate ceph_check_caps()'s logic */
2805 if (ci
->i_auth_cap
&&
2806 (ci
->i_auth_cap
->issued
& CEPH_CAP_FILE_WR
) &&
2807 ci
->i_wanted_max_size
> ci
->i_max_size
&&
2808 ci
->i_wanted_max_size
> ci
->i_requested_max_size
)
2810 spin_unlock(&ci
->i_ceph_lock
);
2812 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
, NULL
);
2815 static inline int get_used_fmode(int caps
)
2818 if (caps
& CEPH_CAP_FILE_RD
)
2819 fmode
|= CEPH_FILE_MODE_RD
;
2820 if (caps
& CEPH_CAP_FILE_WR
)
2821 fmode
|= CEPH_FILE_MODE_WR
;
2825 int ceph_try_get_caps(struct inode
*inode
, int need
, int want
,
2826 bool nonblock
, int *got
)
2830 BUG_ON(need
& ~CEPH_CAP_FILE_RD
);
2831 BUG_ON(want
& ~(CEPH_CAP_FILE_CACHE
| CEPH_CAP_FILE_LAZYIO
|
2832 CEPH_CAP_FILE_SHARED
| CEPH_CAP_FILE_EXCL
|
2833 CEPH_CAP_ANY_DIR_OPS
));
2835 ret
= ceph_pool_perm_check(inode
, need
);
2840 flags
= get_used_fmode(need
| want
);
2842 flags
|= NON_BLOCKING
;
2844 ret
= try_get_cap_refs(inode
, need
, want
, 0, flags
, got
);
2845 /* three special error codes */
2846 if (ret
== -EAGAIN
|| ret
== -EFBIG
|| ret
== -ESTALE
)
2852 * Wait for caps, and take cap references. If we can't get a WR cap
2853 * due to a small max_size, make sure we check_max_size (and possibly
2854 * ask the mds) so we don't get hung up indefinitely.
2856 int ceph_get_caps(struct file
*filp
, int need
, int want
, loff_t endoff
, int *got
)
2858 struct ceph_file_info
*fi
= filp
->private_data
;
2859 struct inode
*inode
= file_inode(filp
);
2860 struct ceph_inode_info
*ci
= ceph_inode(inode
);
2861 struct ceph_fs_client
*fsc
= ceph_inode_to_client(inode
);
2862 int ret
, _got
, flags
;
2864 ret
= ceph_pool_perm_check(inode
, need
);
2868 if ((fi
->fmode
& CEPH_FILE_MODE_WR
) &&
2869 fi
->filp_gen
!= READ_ONCE(fsc
->filp_gen
))
2872 flags
= get_used_fmode(need
| want
);
2875 flags
&= CEPH_FILE_MODE_MASK
;
2876 if (atomic_read(&fi
->num_locks
))
2877 flags
|= CHECK_FILELOCK
;
2879 ret
= try_get_cap_refs(inode
, need
, want
, endoff
,
2881 WARN_ON_ONCE(ret
== -EAGAIN
);
2883 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
2885 DEFINE_WAIT_FUNC(wait
, woken_wake_function
);
2887 cw
.ino
= ceph_ino(inode
);
2888 cw
.tgid
= current
->tgid
;
2892 spin_lock(&mdsc
->caps_list_lock
);
2893 list_add(&cw
.list
, &mdsc
->cap_wait_list
);
2894 spin_unlock(&mdsc
->caps_list_lock
);
2896 /* make sure used fmode not timeout */
2897 ceph_get_fmode(ci
, flags
, FMODE_WAIT_BIAS
);
2898 add_wait_queue(&ci
->i_cap_wq
, &wait
);
2900 flags
|= NON_BLOCKING
;
2901 while (!(ret
= try_get_cap_refs(inode
, need
, want
,
2902 endoff
, flags
, &_got
))) {
2903 if (signal_pending(current
)) {
2907 wait_woken(&wait
, TASK_INTERRUPTIBLE
, MAX_SCHEDULE_TIMEOUT
);
2910 remove_wait_queue(&ci
->i_cap_wq
, &wait
);
2911 ceph_put_fmode(ci
, flags
, FMODE_WAIT_BIAS
);
2913 spin_lock(&mdsc
->caps_list_lock
);
2915 spin_unlock(&mdsc
->caps_list_lock
);
2921 if ((fi
->fmode
& CEPH_FILE_MODE_WR
) &&
2922 fi
->filp_gen
!= READ_ONCE(fsc
->filp_gen
)) {
2923 if (ret
>= 0 && _got
)
2924 ceph_put_cap_refs(ci
, _got
);
2929 if (ret
== -EFBIG
|| ret
== -ESTALE
) {
2930 int ret2
= ceph_wait_on_async_create(inode
);
2934 if (ret
== -EFBIG
) {
2935 check_max_size(inode
, endoff
);
2938 if (ret
== -ESTALE
) {
2939 /* session was killed, try renew caps */
2940 ret
= ceph_renew_caps(inode
, flags
);
2947 if (S_ISREG(ci
->vfs_inode
.i_mode
) &&
2948 ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
2949 (_got
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)) &&
2950 i_size_read(inode
) > 0) {
2952 find_get_page(inode
->i_mapping
, 0);
2954 bool uptodate
= PageUptodate(page
);
2961 * drop cap refs first because getattr while
2962 * holding * caps refs can cause deadlock.
2964 ceph_put_cap_refs(ci
, _got
);
2968 * getattr request will bring inline data into
2971 ret
= __ceph_do_getattr(inode
, NULL
,
2972 CEPH_STAT_CAP_INLINE_DATA
,
2985 * Take cap refs. Caller must already know we hold at least one ref
2986 * on the caps in question or we don't know this is safe.
2988 void ceph_get_cap_refs(struct ceph_inode_info
*ci
, int caps
)
2990 spin_lock(&ci
->i_ceph_lock
);
2991 ceph_take_cap_refs(ci
, caps
, false);
2992 spin_unlock(&ci
->i_ceph_lock
);
2997 * drop cap_snap that is not associated with any snapshot.
2998 * we don't need to send FLUSHSNAP message for it.
3000 static int ceph_try_drop_cap_snap(struct ceph_inode_info
*ci
,
3001 struct ceph_cap_snap
*capsnap
)
3003 if (!capsnap
->need_flush
&&
3004 !capsnap
->writing
&& !capsnap
->dirty_pages
) {
3005 dout("dropping cap_snap %p follows %llu\n",
3006 capsnap
, capsnap
->follows
);
3007 BUG_ON(capsnap
->cap_flush
.tid
> 0);
3008 ceph_put_snap_context(capsnap
->context
);
3009 if (!list_is_last(&capsnap
->ci_item
, &ci
->i_cap_snaps
))
3010 ci
->i_ceph_flags
|= CEPH_I_FLUSH_SNAPS
;
3012 list_del(&capsnap
->ci_item
);
3013 ceph_put_cap_snap(capsnap
);
3019 enum put_cap_refs_mode
{
3020 PUT_CAP_REFS_SYNC
= 0,
3021 PUT_CAP_REFS_NO_CHECK
,
3028 * If we released the last ref on any given cap, call ceph_check_caps
3029 * to release (or schedule a release).
3031 * If we are releasing a WR cap (from a sync write), finalize any affected
3032 * cap_snap, and wake up any waiters.
3034 static void __ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
,
3035 enum put_cap_refs_mode mode
)
3037 struct inode
*inode
= &ci
->vfs_inode
;
3038 int last
= 0, put
= 0, flushsnaps
= 0, wake
= 0;
3039 bool check_flushsnaps
= false;
3041 spin_lock(&ci
->i_ceph_lock
);
3042 if (had
& CEPH_CAP_PIN
)
3044 if (had
& CEPH_CAP_FILE_RD
)
3045 if (--ci
->i_rd_ref
== 0)
3047 if (had
& CEPH_CAP_FILE_CACHE
)
3048 if (--ci
->i_rdcache_ref
== 0)
3050 if (had
& CEPH_CAP_FILE_EXCL
)
3051 if (--ci
->i_fx_ref
== 0)
3053 if (had
& CEPH_CAP_FILE_BUFFER
) {
3054 if (--ci
->i_wb_ref
== 0) {
3056 /* put the ref held by ceph_take_cap_refs() */
3058 check_flushsnaps
= true;
3060 dout("put_cap_refs %p wb %d -> %d (?)\n",
3061 inode
, ci
->i_wb_ref
+1, ci
->i_wb_ref
);
3063 if (had
& CEPH_CAP_FILE_WR
) {
3064 if (--ci
->i_wr_ref
== 0) {
3066 check_flushsnaps
= true;
3067 if (ci
->i_wrbuffer_ref_head
== 0 &&
3068 ci
->i_dirty_caps
== 0 &&
3069 ci
->i_flushing_caps
== 0) {
3070 BUG_ON(!ci
->i_head_snapc
);
3071 ceph_put_snap_context(ci
->i_head_snapc
);
3072 ci
->i_head_snapc
= NULL
;
3074 /* see comment in __ceph_remove_cap() */
3075 if (!__ceph_is_any_real_caps(ci
) && ci
->i_snap_realm
)
3076 ceph_change_snap_realm(inode
, NULL
);
3079 if (check_flushsnaps
&& __ceph_have_pending_cap_snap(ci
)) {
3080 struct ceph_cap_snap
*capsnap
=
3081 list_last_entry(&ci
->i_cap_snaps
,
3082 struct ceph_cap_snap
,
3085 capsnap
->writing
= 0;
3086 if (ceph_try_drop_cap_snap(ci
, capsnap
))
3087 /* put the ref held by ceph_queue_cap_snap() */
3089 else if (__ceph_finish_cap_snap(ci
, capsnap
))
3093 spin_unlock(&ci
->i_ceph_lock
);
3095 dout("put_cap_refs %p had %s%s%s\n", inode
, ceph_cap_string(had
),
3096 last
? " last" : "", put
? " put" : "");
3099 case PUT_CAP_REFS_SYNC
:
3101 ceph_check_caps(ci
, 0, NULL
);
3102 else if (flushsnaps
)
3103 ceph_flush_snaps(ci
, NULL
);
3105 case PUT_CAP_REFS_ASYNC
:
3107 ceph_queue_check_caps(inode
);
3108 else if (flushsnaps
)
3109 ceph_queue_flush_snaps(inode
);
3115 wake_up_all(&ci
->i_cap_wq
);
3120 void ceph_put_cap_refs(struct ceph_inode_info
*ci
, int had
)
3122 __ceph_put_cap_refs(ci
, had
, PUT_CAP_REFS_SYNC
);
3125 void ceph_put_cap_refs_async(struct ceph_inode_info
*ci
, int had
)
3127 __ceph_put_cap_refs(ci
, had
, PUT_CAP_REFS_ASYNC
);
3130 void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info
*ci
, int had
)
3132 __ceph_put_cap_refs(ci
, had
, PUT_CAP_REFS_NO_CHECK
);
3136 * Release @nr WRBUFFER refs on dirty pages for the given @snapc snap
3137 * context. Adjust per-snap dirty page accounting as appropriate.
3138 * Once all dirty data for a cap_snap is flushed, flush snapped file
3139 * metadata back to the MDS. If we dropped the last ref, call
3142 void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info
*ci
, int nr
,
3143 struct ceph_snap_context
*snapc
)
3145 struct inode
*inode
= &ci
->vfs_inode
;
3146 struct ceph_cap_snap
*capsnap
= NULL
;
3150 bool flush_snaps
= false;
3151 bool complete_capsnap
= false;
3153 spin_lock(&ci
->i_ceph_lock
);
3154 ci
->i_wrbuffer_ref
-= nr
;
3155 if (ci
->i_wrbuffer_ref
== 0) {
3160 if (ci
->i_head_snapc
== snapc
) {
3161 ci
->i_wrbuffer_ref_head
-= nr
;
3162 if (ci
->i_wrbuffer_ref_head
== 0 &&
3163 ci
->i_wr_ref
== 0 &&
3164 ci
->i_dirty_caps
== 0 &&
3165 ci
->i_flushing_caps
== 0) {
3166 BUG_ON(!ci
->i_head_snapc
);
3167 ceph_put_snap_context(ci
->i_head_snapc
);
3168 ci
->i_head_snapc
= NULL
;
3170 dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n",
3172 ci
->i_wrbuffer_ref
+nr
, ci
->i_wrbuffer_ref_head
+nr
,
3173 ci
->i_wrbuffer_ref
, ci
->i_wrbuffer_ref_head
,
3174 last
? " LAST" : "");
3176 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
3177 if (capsnap
->context
== snapc
) {
3185 * The capsnap should already be removed when removing
3186 * auth cap in the case of a forced unmount.
3188 WARN_ON_ONCE(ci
->i_auth_cap
);
3192 capsnap
->dirty_pages
-= nr
;
3193 if (capsnap
->dirty_pages
== 0) {
3194 complete_capsnap
= true;
3195 if (!capsnap
->writing
) {
3196 if (ceph_try_drop_cap_snap(ci
, capsnap
)) {
3199 ci
->i_ceph_flags
|= CEPH_I_FLUSH_SNAPS
;
3204 dout("put_wrbuffer_cap_refs on %p cap_snap %p "
3205 " snap %lld %d/%d -> %d/%d %s%s\n",
3206 inode
, capsnap
, capsnap
->context
->seq
,
3207 ci
->i_wrbuffer_ref
+nr
, capsnap
->dirty_pages
+ nr
,
3208 ci
->i_wrbuffer_ref
, capsnap
->dirty_pages
,
3209 last
? " (wrbuffer last)" : "",
3210 complete_capsnap
? " (complete capsnap)" : "");
3214 spin_unlock(&ci
->i_ceph_lock
);
3217 ceph_check_caps(ci
, 0, NULL
);
3218 } else if (flush_snaps
) {
3219 ceph_flush_snaps(ci
, NULL
);
3221 if (complete_capsnap
)
3222 wake_up_all(&ci
->i_cap_wq
);
3229 * Invalidate unlinked inode's aliases, so we can drop the inode ASAP.
3231 static void invalidate_aliases(struct inode
*inode
)
3233 struct dentry
*dn
, *prev
= NULL
;
3235 dout("invalidate_aliases inode %p\n", inode
);
3236 d_prune_aliases(inode
);
3238 * For non-directory inode, d_find_alias() only returns
3239 * hashed dentry. After calling d_invalidate(), the
3240 * dentry becomes unhashed.
3242 * For directory inode, d_find_alias() can return
3243 * unhashed dentry. But directory inode should have
3244 * one alias at most.
3246 while ((dn
= d_find_alias(inode
))) {
3260 struct cap_extra_info
{
3261 struct ceph_string
*pool_ns
;
3271 /* currently issued */
3273 struct timespec64 btime
;
3277 * Handle a cap GRANT message from the MDS. (Note that a GRANT may
3278 * actually be a revocation if it specifies a smaller cap set.)
3280 * caller holds s_mutex and i_ceph_lock, we drop both.
3282 static void handle_cap_grant(struct inode
*inode
,
3283 struct ceph_mds_session
*session
,
3284 struct ceph_cap
*cap
,
3285 struct ceph_mds_caps
*grant
,
3286 struct ceph_buffer
*xattr_buf
,
3287 struct cap_extra_info
*extra_info
)
3288 __releases(ci
->i_ceph_lock
)
3289 __releases(session
->s_mdsc
->snap_rwsem
)
3291 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3292 int seq
= le32_to_cpu(grant
->seq
);
3293 int newcaps
= le32_to_cpu(grant
->caps
);
3294 int used
, wanted
, dirty
;
3295 u64 size
= le64_to_cpu(grant
->size
);
3296 u64 max_size
= le64_to_cpu(grant
->max_size
);
3297 unsigned char check_caps
= 0;
3298 bool was_stale
= cap
->cap_gen
< atomic_read(&session
->s_cap_gen
);
3300 bool writeback
= false;
3301 bool queue_trunc
= false;
3302 bool queue_invalidate
= false;
3303 bool deleted_inode
= false;
3304 bool fill_inline
= false;
3306 dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n",
3307 inode
, cap
, session
->s_mds
, seq
, ceph_cap_string(newcaps
));
3308 dout(" size %llu max_size %llu, i_size %llu\n", size
, max_size
,
3309 i_size_read(inode
));
3313 * If CACHE is being revoked, and we have no dirty buffers,
3314 * try to invalidate (once). (If there are dirty buffers, we
3315 * will invalidate _after_ writeback.)
3317 if (S_ISREG(inode
->i_mode
) && /* don't invalidate readdir cache */
3318 ((cap
->issued
& ~newcaps
) & CEPH_CAP_FILE_CACHE
) &&
3319 (newcaps
& CEPH_CAP_FILE_LAZYIO
) == 0 &&
3320 !(ci
->i_wrbuffer_ref
|| ci
->i_wb_ref
)) {
3321 if (try_nonblocking_invalidate(inode
)) {
3322 /* there were locked pages.. invalidate later
3323 in a separate thread. */
3324 if (ci
->i_rdcache_revoking
!= ci
->i_rdcache_gen
) {
3325 queue_invalidate
= true;
3326 ci
->i_rdcache_revoking
= ci
->i_rdcache_gen
;
3332 cap
->issued
= cap
->implemented
= CEPH_CAP_PIN
;
3335 * auth mds of the inode changed. we received the cap export message,
3336 * but still haven't received the cap import message. handle_cap_export
3337 * updated the new auth MDS' cap.
3339 * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message
3340 * that was sent before the cap import message. So don't remove caps.
3342 if (ceph_seq_cmp(seq
, cap
->seq
) <= 0) {
3343 WARN_ON(cap
!= ci
->i_auth_cap
);
3344 WARN_ON(cap
->cap_id
!= le64_to_cpu(grant
->cap_id
));
3346 newcaps
|= cap
->issued
;
3349 /* side effects now are allowed */
3350 cap
->cap_gen
= atomic_read(&session
->s_cap_gen
);
3353 __check_cap_issue(ci
, cap
, newcaps
);
3355 inode_set_max_iversion_raw(inode
, extra_info
->change_attr
);
3357 if ((newcaps
& CEPH_CAP_AUTH_SHARED
) &&
3358 (extra_info
->issued
& CEPH_CAP_AUTH_EXCL
) == 0) {
3359 umode_t mode
= le32_to_cpu(grant
->mode
);
3361 if (inode_wrong_type(inode
, mode
))
3362 pr_warn_once("inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n",
3363 ceph_vinop(inode
), inode
->i_mode
, mode
);
3365 inode
->i_mode
= mode
;
3366 inode
->i_uid
= make_kuid(&init_user_ns
, le32_to_cpu(grant
->uid
));
3367 inode
->i_gid
= make_kgid(&init_user_ns
, le32_to_cpu(grant
->gid
));
3368 ci
->i_btime
= extra_info
->btime
;
3369 dout("%p mode 0%o uid.gid %d.%d\n", inode
, inode
->i_mode
,
3370 from_kuid(&init_user_ns
, inode
->i_uid
),
3371 from_kgid(&init_user_ns
, inode
->i_gid
));
3374 if ((newcaps
& CEPH_CAP_LINK_SHARED
) &&
3375 (extra_info
->issued
& CEPH_CAP_LINK_EXCL
) == 0) {
3376 set_nlink(inode
, le32_to_cpu(grant
->nlink
));
3377 if (inode
->i_nlink
== 0 &&
3378 (newcaps
& (CEPH_CAP_LINK_SHARED
| CEPH_CAP_LINK_EXCL
)))
3379 deleted_inode
= true;
3382 if ((extra_info
->issued
& CEPH_CAP_XATTR_EXCL
) == 0 &&
3384 int len
= le32_to_cpu(grant
->xattr_len
);
3385 u64 version
= le64_to_cpu(grant
->xattr_version
);
3387 if (version
> ci
->i_xattrs
.version
) {
3388 dout(" got new xattrs v%llu on %p len %d\n",
3389 version
, inode
, len
);
3390 if (ci
->i_xattrs
.blob
)
3391 ceph_buffer_put(ci
->i_xattrs
.blob
);
3392 ci
->i_xattrs
.blob
= ceph_buffer_get(xattr_buf
);
3393 ci
->i_xattrs
.version
= version
;
3394 ceph_forget_all_cached_acls(inode
);
3395 ceph_security_invalidate_secctx(inode
);
3399 if (newcaps
& CEPH_CAP_ANY_RD
) {
3400 struct timespec64 mtime
, atime
, ctime
;
3401 /* ctime/mtime/atime? */
3402 ceph_decode_timespec64(&mtime
, &grant
->mtime
);
3403 ceph_decode_timespec64(&atime
, &grant
->atime
);
3404 ceph_decode_timespec64(&ctime
, &grant
->ctime
);
3405 ceph_fill_file_time(inode
, extra_info
->issued
,
3406 le32_to_cpu(grant
->time_warp_seq
),
3407 &ctime
, &mtime
, &atime
);
3410 if ((newcaps
& CEPH_CAP_FILE_SHARED
) && extra_info
->dirstat_valid
) {
3411 ci
->i_files
= extra_info
->nfiles
;
3412 ci
->i_subdirs
= extra_info
->nsubdirs
;
3415 if (newcaps
& (CEPH_CAP_ANY_FILE_RD
| CEPH_CAP_ANY_FILE_WR
)) {
3416 /* file layout may have changed */
3417 s64 old_pool
= ci
->i_layout
.pool_id
;
3418 struct ceph_string
*old_ns
;
3420 ceph_file_layout_from_legacy(&ci
->i_layout
, &grant
->layout
);
3421 old_ns
= rcu_dereference_protected(ci
->i_layout
.pool_ns
,
3422 lockdep_is_held(&ci
->i_ceph_lock
));
3423 rcu_assign_pointer(ci
->i_layout
.pool_ns
, extra_info
->pool_ns
);
3425 if (ci
->i_layout
.pool_id
!= old_pool
||
3426 extra_info
->pool_ns
!= old_ns
)
3427 ci
->i_ceph_flags
&= ~CEPH_I_POOL_PERM
;
3429 extra_info
->pool_ns
= old_ns
;
3431 /* size/truncate_seq? */
3432 queue_trunc
= ceph_fill_file_size(inode
, extra_info
->issued
,
3433 le32_to_cpu(grant
->truncate_seq
),
3434 le64_to_cpu(grant
->truncate_size
),
3438 if (ci
->i_auth_cap
== cap
&& (newcaps
& CEPH_CAP_ANY_FILE_WR
)) {
3439 if (max_size
!= ci
->i_max_size
) {
3440 dout("max_size %lld -> %llu\n",
3441 ci
->i_max_size
, max_size
);
3442 ci
->i_max_size
= max_size
;
3443 if (max_size
>= ci
->i_wanted_max_size
) {
3444 ci
->i_wanted_max_size
= 0; /* reset */
3445 ci
->i_requested_max_size
= 0;
3451 /* check cap bits */
3452 wanted
= __ceph_caps_wanted(ci
);
3453 used
= __ceph_caps_used(ci
);
3454 dirty
= __ceph_caps_dirty(ci
);
3455 dout(" my wanted = %s, used = %s, dirty %s\n",
3456 ceph_cap_string(wanted
),
3457 ceph_cap_string(used
),
3458 ceph_cap_string(dirty
));
3460 if ((was_stale
|| le32_to_cpu(grant
->op
) == CEPH_CAP_OP_IMPORT
) &&
3461 (wanted
& ~(cap
->mds_wanted
| newcaps
))) {
3463 * If mds is importing cap, prior cap messages that update
3464 * 'wanted' may get dropped by mds (migrate seq mismatch).
3466 * We don't send cap message to update 'wanted' if what we
3467 * want are already issued. If mds revokes caps, cap message
3468 * that releases caps also tells mds what we want. But if
3469 * caps got revoked by mds forcedly (session stale). We may
3470 * haven't told mds what we want.
3475 /* revocation, grant, or no-op? */
3476 if (cap
->issued
& ~newcaps
) {
3477 int revoking
= cap
->issued
& ~newcaps
;
3479 dout("revocation: %s -> %s (revoking %s)\n",
3480 ceph_cap_string(cap
->issued
),
3481 ceph_cap_string(newcaps
),
3482 ceph_cap_string(revoking
));
3483 if (S_ISREG(inode
->i_mode
) &&
3484 (revoking
& used
& CEPH_CAP_FILE_BUFFER
))
3485 writeback
= true; /* initiate writeback; will delay ack */
3486 else if (queue_invalidate
&&
3487 revoking
== CEPH_CAP_FILE_CACHE
&&
3488 (newcaps
& CEPH_CAP_FILE_LAZYIO
) == 0)
3489 ; /* do nothing yet, invalidation will be queued */
3490 else if (cap
== ci
->i_auth_cap
)
3491 check_caps
= 1; /* check auth cap only */
3493 check_caps
= 2; /* check all caps */
3494 cap
->issued
= newcaps
;
3495 cap
->implemented
|= newcaps
;
3496 } else if (cap
->issued
== newcaps
) {
3497 dout("caps unchanged: %s -> %s\n",
3498 ceph_cap_string(cap
->issued
), ceph_cap_string(newcaps
));
3500 dout("grant: %s -> %s\n", ceph_cap_string(cap
->issued
),
3501 ceph_cap_string(newcaps
));
3502 /* non-auth MDS is revoking the newly grant caps ? */
3503 if (cap
== ci
->i_auth_cap
&&
3504 __ceph_caps_revoking_other(ci
, cap
, newcaps
))
3507 cap
->issued
= newcaps
;
3508 cap
->implemented
|= newcaps
; /* add bits only, to
3509 * avoid stepping on a
3510 * pending revocation */
3513 BUG_ON(cap
->issued
& ~cap
->implemented
);
3515 if (extra_info
->inline_version
> 0 &&
3516 extra_info
->inline_version
>= ci
->i_inline_version
) {
3517 ci
->i_inline_version
= extra_info
->inline_version
;
3518 if (ci
->i_inline_version
!= CEPH_INLINE_NONE
&&
3519 (newcaps
& (CEPH_CAP_FILE_CACHE
|CEPH_CAP_FILE_LAZYIO
)))
3523 if (ci
->i_auth_cap
== cap
&&
3524 le32_to_cpu(grant
->op
) == CEPH_CAP_OP_IMPORT
) {
3525 if (newcaps
& ~extra_info
->issued
)
3528 if (ci
->i_requested_max_size
> max_size
||
3529 !(le32_to_cpu(grant
->wanted
) & CEPH_CAP_ANY_FILE_WR
)) {
3530 /* re-request max_size if necessary */
3531 ci
->i_requested_max_size
= 0;
3535 ceph_kick_flushing_inode_caps(session
, ci
);
3536 spin_unlock(&ci
->i_ceph_lock
);
3537 up_read(&session
->s_mdsc
->snap_rwsem
);
3539 spin_unlock(&ci
->i_ceph_lock
);
3543 ceph_fill_inline_data(inode
, NULL
, extra_info
->inline_data
,
3544 extra_info
->inline_len
);
3547 ceph_queue_vmtruncate(inode
);
3551 * queue inode for writeback: we can't actually call
3552 * filemap_write_and_wait, etc. from message handler
3555 ceph_queue_writeback(inode
);
3556 if (queue_invalidate
)
3557 ceph_queue_invalidate(inode
);
3559 invalidate_aliases(inode
);
3561 wake_up_all(&ci
->i_cap_wq
);
3563 mutex_unlock(&session
->s_mutex
);
3564 if (check_caps
== 1)
3565 ceph_check_caps(ci
, CHECK_CAPS_AUTHONLY
| CHECK_CAPS_NOINVAL
,
3567 else if (check_caps
== 2)
3568 ceph_check_caps(ci
, CHECK_CAPS_NOINVAL
, session
);
3572 * Handle FLUSH_ACK from MDS, indicating that metadata we sent to the
3573 * MDS has been safely committed.
3575 static void handle_cap_flush_ack(struct inode
*inode
, u64 flush_tid
,
3576 struct ceph_mds_caps
*m
,
3577 struct ceph_mds_session
*session
,
3578 struct ceph_cap
*cap
)
3579 __releases(ci
->i_ceph_lock
)
3581 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3582 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
3583 struct ceph_cap_flush
*cf
, *tmp_cf
;
3584 LIST_HEAD(to_remove
);
3585 unsigned seq
= le32_to_cpu(m
->seq
);
3586 int dirty
= le32_to_cpu(m
->dirty
);
3589 bool wake_ci
= false;
3590 bool wake_mdsc
= false;
3592 list_for_each_entry_safe(cf
, tmp_cf
, &ci
->i_cap_flush_list
, i_list
) {
3593 /* Is this the one that was flushed? */
3594 if (cf
->tid
== flush_tid
)
3597 /* Is this a capsnap? */
3601 if (cf
->tid
<= flush_tid
) {
3603 * An earlier or current tid. The FLUSH_ACK should
3604 * represent a superset of this flush's caps.
3606 wake_ci
|= __detach_cap_flush_from_ci(ci
, cf
);
3607 list_add_tail(&cf
->i_list
, &to_remove
);
3610 * This is a later one. Any caps in it are still dirty
3611 * so don't count them as cleaned.
3613 cleaned
&= ~cf
->caps
;
3619 dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s,"
3620 " flushing %s -> %s\n",
3621 inode
, session
->s_mds
, seq
, ceph_cap_string(dirty
),
3622 ceph_cap_string(cleaned
), ceph_cap_string(ci
->i_flushing_caps
),
3623 ceph_cap_string(ci
->i_flushing_caps
& ~cleaned
));
3625 if (list_empty(&to_remove
) && !cleaned
)
3628 ci
->i_flushing_caps
&= ~cleaned
;
3630 spin_lock(&mdsc
->cap_dirty_lock
);
3632 list_for_each_entry(cf
, &to_remove
, i_list
)
3633 wake_mdsc
|= __detach_cap_flush_from_mdsc(mdsc
, cf
);
3635 if (ci
->i_flushing_caps
== 0) {
3636 if (list_empty(&ci
->i_cap_flush_list
)) {
3637 list_del_init(&ci
->i_flushing_item
);
3638 if (!list_empty(&session
->s_cap_flushing
)) {
3639 dout(" mds%d still flushing cap on %p\n",
3641 &list_first_entry(&session
->s_cap_flushing
,
3642 struct ceph_inode_info
,
3643 i_flushing_item
)->vfs_inode
);
3646 mdsc
->num_cap_flushing
--;
3647 dout(" inode %p now !flushing\n", inode
);
3649 if (ci
->i_dirty_caps
== 0) {
3650 dout(" inode %p now clean\n", inode
);
3651 BUG_ON(!list_empty(&ci
->i_dirty_item
));
3653 if (ci
->i_wr_ref
== 0 &&
3654 ci
->i_wrbuffer_ref_head
== 0) {
3655 BUG_ON(!ci
->i_head_snapc
);
3656 ceph_put_snap_context(ci
->i_head_snapc
);
3657 ci
->i_head_snapc
= NULL
;
3660 BUG_ON(list_empty(&ci
->i_dirty_item
));
3663 spin_unlock(&mdsc
->cap_dirty_lock
);
3666 spin_unlock(&ci
->i_ceph_lock
);
3668 while (!list_empty(&to_remove
)) {
3669 cf
= list_first_entry(&to_remove
,
3670 struct ceph_cap_flush
, i_list
);
3671 list_del_init(&cf
->i_list
);
3672 if (!cf
->is_capsnap
)
3673 ceph_free_cap_flush(cf
);
3677 wake_up_all(&ci
->i_cap_wq
);
3679 wake_up_all(&mdsc
->cap_flushing_wq
);
3684 void __ceph_remove_capsnap(struct inode
*inode
, struct ceph_cap_snap
*capsnap
,
3685 bool *wake_ci
, bool *wake_mdsc
)
3687 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3688 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
3691 lockdep_assert_held(&ci
->i_ceph_lock
);
3693 dout("removing capsnap %p, inode %p ci %p\n", capsnap
, inode
, ci
);
3695 list_del_init(&capsnap
->ci_item
);
3696 ret
= __detach_cap_flush_from_ci(ci
, &capsnap
->cap_flush
);
3700 spin_lock(&mdsc
->cap_dirty_lock
);
3701 if (list_empty(&ci
->i_cap_flush_list
))
3702 list_del_init(&ci
->i_flushing_item
);
3704 ret
= __detach_cap_flush_from_mdsc(mdsc
, &capsnap
->cap_flush
);
3707 spin_unlock(&mdsc
->cap_dirty_lock
);
3710 void ceph_remove_capsnap(struct inode
*inode
, struct ceph_cap_snap
*capsnap
,
3711 bool *wake_ci
, bool *wake_mdsc
)
3713 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3715 lockdep_assert_held(&ci
->i_ceph_lock
);
3717 WARN_ON_ONCE(capsnap
->dirty_pages
|| capsnap
->writing
);
3718 __ceph_remove_capsnap(inode
, capsnap
, wake_ci
, wake_mdsc
);
3722 * Handle FLUSHSNAP_ACK. MDS has flushed snap data to disk and we can
3723 * throw away our cap_snap.
3725 * Caller hold s_mutex.
3727 static void handle_cap_flushsnap_ack(struct inode
*inode
, u64 flush_tid
,
3728 struct ceph_mds_caps
*m
,
3729 struct ceph_mds_session
*session
)
3731 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3732 struct ceph_mds_client
*mdsc
= ceph_sb_to_client(inode
->i_sb
)->mdsc
;
3733 u64 follows
= le64_to_cpu(m
->snap_follows
);
3734 struct ceph_cap_snap
*capsnap
;
3735 bool flushed
= false;
3736 bool wake_ci
= false;
3737 bool wake_mdsc
= false;
3739 dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n",
3740 inode
, ci
, session
->s_mds
, follows
);
3742 spin_lock(&ci
->i_ceph_lock
);
3743 list_for_each_entry(capsnap
, &ci
->i_cap_snaps
, ci_item
) {
3744 if (capsnap
->follows
== follows
) {
3745 if (capsnap
->cap_flush
.tid
!= flush_tid
) {
3746 dout(" cap_snap %p follows %lld tid %lld !="
3747 " %lld\n", capsnap
, follows
,
3748 flush_tid
, capsnap
->cap_flush
.tid
);
3754 dout(" skipping cap_snap %p follows %lld\n",
3755 capsnap
, capsnap
->follows
);
3759 ceph_remove_capsnap(inode
, capsnap
, &wake_ci
, &wake_mdsc
);
3760 spin_unlock(&ci
->i_ceph_lock
);
3763 ceph_put_snap_context(capsnap
->context
);
3764 ceph_put_cap_snap(capsnap
);
3766 wake_up_all(&ci
->i_cap_wq
);
3768 wake_up_all(&mdsc
->cap_flushing_wq
);
3774 * Handle TRUNC from MDS, indicating file truncation.
3776 * caller hold s_mutex.
3778 static bool handle_cap_trunc(struct inode
*inode
,
3779 struct ceph_mds_caps
*trunc
,
3780 struct ceph_mds_session
*session
)
3782 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3783 int mds
= session
->s_mds
;
3784 int seq
= le32_to_cpu(trunc
->seq
);
3785 u32 truncate_seq
= le32_to_cpu(trunc
->truncate_seq
);
3786 u64 truncate_size
= le64_to_cpu(trunc
->truncate_size
);
3787 u64 size
= le64_to_cpu(trunc
->size
);
3788 int implemented
= 0;
3789 int dirty
= __ceph_caps_dirty(ci
);
3790 int issued
= __ceph_caps_issued(ceph_inode(inode
), &implemented
);
3791 bool queue_trunc
= false;
3793 lockdep_assert_held(&ci
->i_ceph_lock
);
3795 issued
|= implemented
| dirty
;
3797 dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n",
3798 inode
, mds
, seq
, truncate_size
, truncate_seq
);
3799 queue_trunc
= ceph_fill_file_size(inode
, issued
,
3800 truncate_seq
, truncate_size
, size
);
3805 * Handle EXPORT from MDS. Cap is being migrated _from_ this mds to a
3806 * different one. If we are the most recent migration we've seen (as
3807 * indicated by mseq), make note of the migrating cap bits for the
3808 * duration (until we see the corresponding IMPORT).
3810 * caller holds s_mutex
3812 static void handle_cap_export(struct inode
*inode
, struct ceph_mds_caps
*ex
,
3813 struct ceph_mds_cap_peer
*ph
,
3814 struct ceph_mds_session
*session
)
3816 struct ceph_mds_client
*mdsc
= ceph_inode_to_client(inode
)->mdsc
;
3817 struct ceph_mds_session
*tsession
= NULL
;
3818 struct ceph_cap
*cap
, *tcap
, *new_cap
= NULL
;
3819 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3821 unsigned mseq
= le32_to_cpu(ex
->migrate_seq
);
3822 unsigned t_seq
, t_mseq
;
3824 int mds
= session
->s_mds
;
3827 t_cap_id
= le64_to_cpu(ph
->cap_id
);
3828 t_seq
= le32_to_cpu(ph
->seq
);
3829 t_mseq
= le32_to_cpu(ph
->mseq
);
3830 target
= le32_to_cpu(ph
->mds
);
3832 t_cap_id
= t_seq
= t_mseq
= 0;
3836 dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n",
3837 inode
, ci
, mds
, mseq
, target
);
3839 spin_lock(&ci
->i_ceph_lock
);
3840 cap
= __get_cap_for_mds(ci
, mds
);
3841 if (!cap
|| cap
->cap_id
!= le64_to_cpu(ex
->cap_id
))
3845 ceph_remove_cap(cap
, false);
3850 * now we know we haven't received the cap import message yet
3851 * because the exported cap still exist.
3854 issued
= cap
->issued
;
3855 if (issued
!= cap
->implemented
)
3856 pr_err_ratelimited("handle_cap_export: issued != implemented: "
3857 "ino (%llx.%llx) mds%d seq %d mseq %d "
3858 "issued %s implemented %s\n",
3859 ceph_vinop(inode
), mds
, cap
->seq
, cap
->mseq
,
3860 ceph_cap_string(issued
),
3861 ceph_cap_string(cap
->implemented
));
3864 tcap
= __get_cap_for_mds(ci
, target
);
3866 /* already have caps from the target */
3867 if (tcap
->cap_id
== t_cap_id
&&
3868 ceph_seq_cmp(tcap
->seq
, t_seq
) < 0) {
3869 dout(" updating import cap %p mds%d\n", tcap
, target
);
3870 tcap
->cap_id
= t_cap_id
;
3871 tcap
->seq
= t_seq
- 1;
3872 tcap
->issue_seq
= t_seq
- 1;
3873 tcap
->issued
|= issued
;
3874 tcap
->implemented
|= issued
;
3875 if (cap
== ci
->i_auth_cap
) {
3876 ci
->i_auth_cap
= tcap
;
3877 change_auth_cap_ses(ci
, tcap
->session
);
3880 ceph_remove_cap(cap
, false);
3882 } else if (tsession
) {
3883 /* add placeholder for the export tagert */
3884 int flag
= (cap
== ci
->i_auth_cap
) ? CEPH_CAP_FLAG_AUTH
: 0;
3886 ceph_add_cap(inode
, tsession
, t_cap_id
, issued
, 0,
3887 t_seq
- 1, t_mseq
, (u64
)-1, flag
, &new_cap
);
3889 if (!list_empty(&ci
->i_cap_flush_list
) &&
3890 ci
->i_auth_cap
== tcap
) {
3891 spin_lock(&mdsc
->cap_dirty_lock
);
3892 list_move_tail(&ci
->i_flushing_item
,
3893 &tcap
->session
->s_cap_flushing
);
3894 spin_unlock(&mdsc
->cap_dirty_lock
);
3897 ceph_remove_cap(cap
, false);
3901 spin_unlock(&ci
->i_ceph_lock
);
3902 mutex_unlock(&session
->s_mutex
);
3904 /* open target session */
3905 tsession
= ceph_mdsc_open_export_target_session(mdsc
, target
);
3906 if (!IS_ERR(tsession
)) {
3908 mutex_lock(&session
->s_mutex
);
3909 mutex_lock_nested(&tsession
->s_mutex
,
3910 SINGLE_DEPTH_NESTING
);
3912 mutex_lock(&tsession
->s_mutex
);
3913 mutex_lock_nested(&session
->s_mutex
,
3914 SINGLE_DEPTH_NESTING
);
3916 new_cap
= ceph_get_cap(mdsc
, NULL
);
3921 mutex_lock(&session
->s_mutex
);
3926 spin_unlock(&ci
->i_ceph_lock
);
3927 mutex_unlock(&session
->s_mutex
);
3929 mutex_unlock(&tsession
->s_mutex
);
3930 ceph_put_mds_session(tsession
);
3933 ceph_put_cap(mdsc
, new_cap
);
3937 * Handle cap IMPORT.
3939 * caller holds s_mutex. acquires i_ceph_lock
3941 static void handle_cap_import(struct ceph_mds_client
*mdsc
,
3942 struct inode
*inode
, struct ceph_mds_caps
*im
,
3943 struct ceph_mds_cap_peer
*ph
,
3944 struct ceph_mds_session
*session
,
3945 struct ceph_cap
**target_cap
, int *old_issued
)
3947 struct ceph_inode_info
*ci
= ceph_inode(inode
);
3948 struct ceph_cap
*cap
, *ocap
, *new_cap
= NULL
;
3949 int mds
= session
->s_mds
;
3951 unsigned caps
= le32_to_cpu(im
->caps
);
3952 unsigned wanted
= le32_to_cpu(im
->wanted
);
3953 unsigned seq
= le32_to_cpu(im
->seq
);
3954 unsigned mseq
= le32_to_cpu(im
->migrate_seq
);
3955 u64 realmino
= le64_to_cpu(im
->realm
);
3956 u64 cap_id
= le64_to_cpu(im
->cap_id
);
3961 p_cap_id
= le64_to_cpu(ph
->cap_id
);
3962 peer
= le32_to_cpu(ph
->mds
);
3968 dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n",
3969 inode
, ci
, mds
, mseq
, peer
);
3971 cap
= __get_cap_for_mds(ci
, mds
);
3974 spin_unlock(&ci
->i_ceph_lock
);
3975 new_cap
= ceph_get_cap(mdsc
, NULL
);
3976 spin_lock(&ci
->i_ceph_lock
);
3982 ceph_put_cap(mdsc
, new_cap
);
3987 __ceph_caps_issued(ci
, &issued
);
3988 issued
|= __ceph_caps_dirty(ci
);
3990 ceph_add_cap(inode
, session
, cap_id
, caps
, wanted
, seq
, mseq
,
3991 realmino
, CEPH_CAP_FLAG_AUTH
, &new_cap
);
3993 ocap
= peer
>= 0 ? __get_cap_for_mds(ci
, peer
) : NULL
;
3994 if (ocap
&& ocap
->cap_id
== p_cap_id
) {
3995 dout(" remove export cap %p mds%d flags %d\n",
3996 ocap
, peer
, ph
->flags
);
3997 if ((ph
->flags
& CEPH_CAP_FLAG_AUTH
) &&
3998 (ocap
->seq
!= le32_to_cpu(ph
->seq
) ||
3999 ocap
->mseq
!= le32_to_cpu(ph
->mseq
))) {
4000 pr_err_ratelimited("handle_cap_import: "
4001 "mismatched seq/mseq: ino (%llx.%llx) "
4002 "mds%d seq %d mseq %d importer mds%d "
4003 "has peer seq %d mseq %d\n",
4004 ceph_vinop(inode
), peer
, ocap
->seq
,
4005 ocap
->mseq
, mds
, le32_to_cpu(ph
->seq
),
4006 le32_to_cpu(ph
->mseq
));
4008 ceph_remove_cap(ocap
, (ph
->flags
& CEPH_CAP_FLAG_RELEASE
));
4011 *old_issued
= issued
;
4016 * Handle a caps message from the MDS.
4018 * Identify the appropriate session, inode, and call the right handler
4019 * based on the cap op.
4021 void ceph_handle_caps(struct ceph_mds_session
*session
,
4022 struct ceph_msg
*msg
)
4024 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
4025 struct inode
*inode
;
4026 struct ceph_inode_info
*ci
;
4027 struct ceph_cap
*cap
;
4028 struct ceph_mds_caps
*h
;
4029 struct ceph_mds_cap_peer
*peer
= NULL
;
4030 struct ceph_snap_realm
*realm
= NULL
;
4032 int msg_version
= le16_to_cpu(msg
->hdr
.version
);
4034 struct ceph_vino vino
;
4036 size_t snaptrace_len
;
4038 struct cap_extra_info extra_info
= {};
4041 dout("handle_caps from mds%d\n", session
->s_mds
);
4044 end
= msg
->front
.iov_base
+ msg
->front
.iov_len
;
4045 if (msg
->front
.iov_len
< sizeof(*h
))
4047 h
= msg
->front
.iov_base
;
4048 op
= le32_to_cpu(h
->op
);
4049 vino
.ino
= le64_to_cpu(h
->ino
);
4050 vino
.snap
= CEPH_NOSNAP
;
4051 seq
= le32_to_cpu(h
->seq
);
4052 mseq
= le32_to_cpu(h
->migrate_seq
);
4055 snaptrace_len
= le32_to_cpu(h
->snap_trace_len
);
4056 p
= snaptrace
+ snaptrace_len
;
4058 if (msg_version
>= 2) {
4060 ceph_decode_32_safe(&p
, end
, flock_len
, bad
);
4061 if (p
+ flock_len
> end
)
4066 if (msg_version
>= 3) {
4067 if (op
== CEPH_CAP_OP_IMPORT
) {
4068 if (p
+ sizeof(*peer
) > end
)
4072 } else if (op
== CEPH_CAP_OP_EXPORT
) {
4073 /* recorded in unused fields */
4074 peer
= (void *)&h
->size
;
4078 if (msg_version
>= 4) {
4079 ceph_decode_64_safe(&p
, end
, extra_info
.inline_version
, bad
);
4080 ceph_decode_32_safe(&p
, end
, extra_info
.inline_len
, bad
);
4081 if (p
+ extra_info
.inline_len
> end
)
4083 extra_info
.inline_data
= p
;
4084 p
+= extra_info
.inline_len
;
4087 if (msg_version
>= 5) {
4088 struct ceph_osd_client
*osdc
= &mdsc
->fsc
->client
->osdc
;
4091 ceph_decode_32_safe(&p
, end
, epoch_barrier
, bad
);
4092 ceph_osdc_update_epoch_barrier(osdc
, epoch_barrier
);
4095 if (msg_version
>= 8) {
4099 ceph_decode_skip_64(&p
, end
, bad
); // flush_tid
4101 ceph_decode_skip_32(&p
, end
, bad
); // caller_uid
4102 ceph_decode_skip_32(&p
, end
, bad
); // caller_gid
4104 ceph_decode_32_safe(&p
, end
, pool_ns_len
, bad
);
4105 if (pool_ns_len
> 0) {
4106 ceph_decode_need(&p
, end
, pool_ns_len
, bad
);
4107 extra_info
.pool_ns
=
4108 ceph_find_or_create_string(p
, pool_ns_len
);
4113 if (msg_version
>= 9) {
4114 struct ceph_timespec
*btime
;
4116 if (p
+ sizeof(*btime
) > end
)
4119 ceph_decode_timespec64(&extra_info
.btime
, btime
);
4120 p
+= sizeof(*btime
);
4121 ceph_decode_64_safe(&p
, end
, extra_info
.change_attr
, bad
);
4124 if (msg_version
>= 11) {
4126 ceph_decode_skip_32(&p
, end
, bad
); // flags
4128 extra_info
.dirstat_valid
= true;
4129 ceph_decode_64_safe(&p
, end
, extra_info
.nfiles
, bad
);
4130 ceph_decode_64_safe(&p
, end
, extra_info
.nsubdirs
, bad
);
4134 inode
= ceph_find_inode(mdsc
->fsc
->sb
, vino
);
4135 ci
= ceph_inode(inode
);
4136 dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op
), vino
.ino
,
4139 mutex_lock(&session
->s_mutex
);
4140 inc_session_sequence(session
);
4141 dout(" mds%d seq %lld cap seq %u\n", session
->s_mds
, session
->s_seq
,
4145 dout(" i don't have ino %llx\n", vino
.ino
);
4147 if (op
== CEPH_CAP_OP_IMPORT
) {
4148 cap
= ceph_get_cap(mdsc
, NULL
);
4149 cap
->cap_ino
= vino
.ino
;
4150 cap
->queue_release
= 1;
4151 cap
->cap_id
= le64_to_cpu(h
->cap_id
);
4154 cap
->issue_seq
= seq
;
4155 spin_lock(&session
->s_cap_lock
);
4156 __ceph_queue_cap_release(session
, cap
);
4157 spin_unlock(&session
->s_cap_lock
);
4159 goto flush_cap_releases
;
4162 /* these will work even if we don't have a cap yet */
4164 case CEPH_CAP_OP_FLUSHSNAP_ACK
:
4165 handle_cap_flushsnap_ack(inode
, le64_to_cpu(msg
->hdr
.tid
),
4169 case CEPH_CAP_OP_EXPORT
:
4170 handle_cap_export(inode
, h
, peer
, session
);
4173 case CEPH_CAP_OP_IMPORT
:
4175 if (snaptrace_len
) {
4176 down_write(&mdsc
->snap_rwsem
);
4177 ceph_update_snap_trace(mdsc
, snaptrace
,
4178 snaptrace
+ snaptrace_len
,
4180 downgrade_write(&mdsc
->snap_rwsem
);
4182 down_read(&mdsc
->snap_rwsem
);
4184 spin_lock(&ci
->i_ceph_lock
);
4185 handle_cap_import(mdsc
, inode
, h
, peer
, session
,
4186 &cap
, &extra_info
.issued
);
4187 handle_cap_grant(inode
, session
, cap
,
4188 h
, msg
->middle
, &extra_info
);
4190 ceph_put_snap_realm(mdsc
, realm
);
4194 /* the rest require a cap */
4195 spin_lock(&ci
->i_ceph_lock
);
4196 cap
= __get_cap_for_mds(ceph_inode(inode
), session
->s_mds
);
4198 dout(" no cap on %p ino %llx.%llx from mds%d\n",
4199 inode
, ceph_ino(inode
), ceph_snap(inode
),
4201 spin_unlock(&ci
->i_ceph_lock
);
4202 goto flush_cap_releases
;
4205 /* note that each of these drops i_ceph_lock for us */
4207 case CEPH_CAP_OP_REVOKE
:
4208 case CEPH_CAP_OP_GRANT
:
4209 __ceph_caps_issued(ci
, &extra_info
.issued
);
4210 extra_info
.issued
|= __ceph_caps_dirty(ci
);
4211 handle_cap_grant(inode
, session
, cap
,
4212 h
, msg
->middle
, &extra_info
);
4215 case CEPH_CAP_OP_FLUSH_ACK
:
4216 handle_cap_flush_ack(inode
, le64_to_cpu(msg
->hdr
.tid
),
4220 case CEPH_CAP_OP_TRUNC
:
4221 queue_trunc
= handle_cap_trunc(inode
, h
, session
);
4222 spin_unlock(&ci
->i_ceph_lock
);
4224 ceph_queue_vmtruncate(inode
);
4228 spin_unlock(&ci
->i_ceph_lock
);
4229 pr_err("ceph_handle_caps: unknown cap op %d %s\n", op
,
4230 ceph_cap_op_name(op
));
4234 mutex_unlock(&session
->s_mutex
);
4238 ceph_put_string(extra_info
.pool_ns
);
4243 * send any cap release message to try to move things
4244 * along for the mds (who clearly thinks we still have this
4247 ceph_flush_cap_releases(mdsc
, session
);
4251 pr_err("ceph_handle_caps: corrupt message\n");
4257 * Delayed work handler to process end of delayed cap release LRU list.
4259 * If new caps are added to the list while processing it, these won't get
4260 * processed in this run. In this case, the ci->i_hold_caps_max will be
4261 * returned so that the work can be scheduled accordingly.
4263 unsigned long ceph_check_delayed_caps(struct ceph_mds_client
*mdsc
)
4265 struct inode
*inode
;
4266 struct ceph_inode_info
*ci
;
4267 struct ceph_mount_options
*opt
= mdsc
->fsc
->mount_options
;
4268 unsigned long delay_max
= opt
->caps_wanted_delay_max
* HZ
;
4269 unsigned long loop_start
= jiffies
;
4270 unsigned long delay
= 0;
4272 dout("check_delayed_caps\n");
4273 spin_lock(&mdsc
->cap_delay_lock
);
4274 while (!list_empty(&mdsc
->cap_delay_list
)) {
4275 ci
= list_first_entry(&mdsc
->cap_delay_list
,
4276 struct ceph_inode_info
,
4278 if (time_before(loop_start
, ci
->i_hold_caps_max
- delay_max
)) {
4279 dout("%s caps added recently. Exiting loop", __func__
);
4280 delay
= ci
->i_hold_caps_max
;
4283 if ((ci
->i_ceph_flags
& CEPH_I_FLUSH
) == 0 &&
4284 time_before(jiffies
, ci
->i_hold_caps_max
))
4286 list_del_init(&ci
->i_cap_delay_list
);
4288 inode
= igrab(&ci
->vfs_inode
);
4290 spin_unlock(&mdsc
->cap_delay_lock
);
4291 dout("check_delayed_caps on %p\n", inode
);
4292 ceph_check_caps(ci
, 0, NULL
);
4294 spin_lock(&mdsc
->cap_delay_lock
);
4297 spin_unlock(&mdsc
->cap_delay_lock
);
4303 * Flush all dirty caps to the mds
4305 static void flush_dirty_session_caps(struct ceph_mds_session
*s
)
4307 struct ceph_mds_client
*mdsc
= s
->s_mdsc
;
4308 struct ceph_inode_info
*ci
;
4309 struct inode
*inode
;
4311 dout("flush_dirty_caps\n");
4312 spin_lock(&mdsc
->cap_dirty_lock
);
4313 while (!list_empty(&s
->s_cap_dirty
)) {
4314 ci
= list_first_entry(&s
->s_cap_dirty
, struct ceph_inode_info
,
4316 inode
= &ci
->vfs_inode
;
4318 dout("flush_dirty_caps %p\n", inode
);
4319 spin_unlock(&mdsc
->cap_dirty_lock
);
4320 ceph_check_caps(ci
, CHECK_CAPS_FLUSH
, NULL
);
4322 spin_lock(&mdsc
->cap_dirty_lock
);
4324 spin_unlock(&mdsc
->cap_dirty_lock
);
4325 dout("flush_dirty_caps done\n");
4328 void ceph_flush_dirty_caps(struct ceph_mds_client
*mdsc
)
4330 ceph_mdsc_iterate_sessions(mdsc
, flush_dirty_session_caps
, true);
4333 void __ceph_touch_fmode(struct ceph_inode_info
*ci
,
4334 struct ceph_mds_client
*mdsc
, int fmode
)
4336 unsigned long now
= jiffies
;
4337 if (fmode
& CEPH_FILE_MODE_RD
)
4338 ci
->i_last_rd
= now
;
4339 if (fmode
& CEPH_FILE_MODE_WR
)
4340 ci
->i_last_wr
= now
;
4341 /* queue periodic check */
4343 __ceph_is_any_real_caps(ci
) &&
4344 list_empty(&ci
->i_cap_delay_list
))
4345 __cap_delay_requeue(mdsc
, ci
);
4348 void ceph_get_fmode(struct ceph_inode_info
*ci
, int fmode
, int count
)
4350 struct ceph_mds_client
*mdsc
= ceph_sb_to_mdsc(ci
->vfs_inode
.i_sb
);
4351 int bits
= (fmode
<< 1) | 1;
4352 bool already_opened
= false;
4356 atomic64_inc(&mdsc
->metric
.opened_files
);
4358 spin_lock(&ci
->i_ceph_lock
);
4359 for (i
= 0; i
< CEPH_FILE_MODE_BITS
; i
++) {
4361 * If any of the mode ref is larger than 0,
4362 * that means it has been already opened by
4363 * others. Just skip checking the PIN ref.
4365 if (i
&& ci
->i_nr_by_mode
[i
])
4366 already_opened
= true;
4368 if (bits
& (1 << i
))
4369 ci
->i_nr_by_mode
[i
] += count
;
4372 if (!already_opened
)
4373 percpu_counter_inc(&mdsc
->metric
.opened_inodes
);
4374 spin_unlock(&ci
->i_ceph_lock
);
4378 * Drop open file reference. If we were the last open file,
4379 * we may need to release capabilities to the MDS (or schedule
4380 * their delayed release).
4382 void ceph_put_fmode(struct ceph_inode_info
*ci
, int fmode
, int count
)
4384 struct ceph_mds_client
*mdsc
= ceph_sb_to_mdsc(ci
->vfs_inode
.i_sb
);
4385 int bits
= (fmode
<< 1) | 1;
4386 bool is_closed
= true;
4390 atomic64_dec(&mdsc
->metric
.opened_files
);
4392 spin_lock(&ci
->i_ceph_lock
);
4393 for (i
= 0; i
< CEPH_FILE_MODE_BITS
; i
++) {
4394 if (bits
& (1 << i
)) {
4395 BUG_ON(ci
->i_nr_by_mode
[i
] < count
);
4396 ci
->i_nr_by_mode
[i
] -= count
;
4400 * If any of the mode ref is not 0 after
4401 * decreased, that means it is still opened
4402 * by others. Just skip checking the PIN ref.
4404 if (i
&& ci
->i_nr_by_mode
[i
])
4409 percpu_counter_dec(&mdsc
->metric
.opened_inodes
);
4410 spin_unlock(&ci
->i_ceph_lock
);
4414 * For a soon-to-be unlinked file, drop the LINK caps. If it
4415 * looks like the link count will hit 0, drop any other caps (other
4416 * than PIN) we don't specifically want (due to the file still being
4419 int ceph_drop_caps_for_unlink(struct inode
*inode
)
4421 struct ceph_inode_info
*ci
= ceph_inode(inode
);
4422 int drop
= CEPH_CAP_LINK_SHARED
| CEPH_CAP_LINK_EXCL
;
4424 spin_lock(&ci
->i_ceph_lock
);
4425 if (inode
->i_nlink
== 1) {
4426 drop
|= ~(__ceph_caps_wanted(ci
) | CEPH_CAP_PIN
);
4428 if (__ceph_caps_dirty(ci
)) {
4429 struct ceph_mds_client
*mdsc
=
4430 ceph_inode_to_client(inode
)->mdsc
;
4431 __cap_delay_requeue_front(mdsc
, ci
);
4434 spin_unlock(&ci
->i_ceph_lock
);
4439 * Helpers for embedding cap and dentry lease releases into mds
4442 * @force is used by dentry_release (below) to force inclusion of a
4443 * record for the directory inode, even when there aren't any caps to
4446 int ceph_encode_inode_release(void **p
, struct inode
*inode
,
4447 int mds
, int drop
, int unless
, int force
)
4449 struct ceph_inode_info
*ci
= ceph_inode(inode
);
4450 struct ceph_cap
*cap
;
4451 struct ceph_mds_request_release
*rel
= *p
;
4455 spin_lock(&ci
->i_ceph_lock
);
4456 used
= __ceph_caps_used(ci
);
4457 dirty
= __ceph_caps_dirty(ci
);
4459 dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n",
4460 inode
, mds
, ceph_cap_string(used
|dirty
), ceph_cap_string(drop
),
4461 ceph_cap_string(unless
));
4463 /* only drop unused, clean caps */
4464 drop
&= ~(used
| dirty
);
4466 cap
= __get_cap_for_mds(ci
, mds
);
4467 if (cap
&& __cap_is_valid(cap
)) {
4468 unless
&= cap
->issued
;
4470 if (unless
& CEPH_CAP_AUTH_EXCL
)
4471 drop
&= ~CEPH_CAP_AUTH_SHARED
;
4472 if (unless
& CEPH_CAP_LINK_EXCL
)
4473 drop
&= ~CEPH_CAP_LINK_SHARED
;
4474 if (unless
& CEPH_CAP_XATTR_EXCL
)
4475 drop
&= ~CEPH_CAP_XATTR_SHARED
;
4476 if (unless
& CEPH_CAP_FILE_EXCL
)
4477 drop
&= ~CEPH_CAP_FILE_SHARED
;
4480 if (force
|| (cap
->issued
& drop
)) {
4481 if (cap
->issued
& drop
) {
4482 int wanted
= __ceph_caps_wanted(ci
);
4483 dout("encode_inode_release %p cap %p "
4484 "%s -> %s, wanted %s -> %s\n", inode
, cap
,
4485 ceph_cap_string(cap
->issued
),
4486 ceph_cap_string(cap
->issued
& ~drop
),
4487 ceph_cap_string(cap
->mds_wanted
),
4488 ceph_cap_string(wanted
));
4490 cap
->issued
&= ~drop
;
4491 cap
->implemented
&= ~drop
;
4492 cap
->mds_wanted
= wanted
;
4493 if (cap
== ci
->i_auth_cap
&&
4494 !(wanted
& CEPH_CAP_ANY_FILE_WR
))
4495 ci
->i_requested_max_size
= 0;
4497 dout("encode_inode_release %p cap %p %s"
4498 " (force)\n", inode
, cap
,
4499 ceph_cap_string(cap
->issued
));
4502 rel
->ino
= cpu_to_le64(ceph_ino(inode
));
4503 rel
->cap_id
= cpu_to_le64(cap
->cap_id
);
4504 rel
->seq
= cpu_to_le32(cap
->seq
);
4505 rel
->issue_seq
= cpu_to_le32(cap
->issue_seq
);
4506 rel
->mseq
= cpu_to_le32(cap
->mseq
);
4507 rel
->caps
= cpu_to_le32(cap
->implemented
);
4508 rel
->wanted
= cpu_to_le32(cap
->mds_wanted
);
4514 dout("encode_inode_release %p cap %p %s (noop)\n",
4515 inode
, cap
, ceph_cap_string(cap
->issued
));
4518 spin_unlock(&ci
->i_ceph_lock
);
4522 int ceph_encode_dentry_release(void **p
, struct dentry
*dentry
,
4524 int mds
, int drop
, int unless
)
4526 struct dentry
*parent
= NULL
;
4527 struct ceph_mds_request_release
*rel
= *p
;
4528 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
4533 * force an record for the directory caps if we have a dentry lease.
4534 * this is racy (can't take i_ceph_lock and d_lock together), but it
4535 * doesn't have to be perfect; the mds will revoke anything we don't
4538 spin_lock(&dentry
->d_lock
);
4539 if (di
->lease_session
&& di
->lease_session
->s_mds
== mds
)
4542 parent
= dget(dentry
->d_parent
);
4543 dir
= d_inode(parent
);
4545 spin_unlock(&dentry
->d_lock
);
4547 ret
= ceph_encode_inode_release(p
, dir
, mds
, drop
, unless
, force
);
4550 spin_lock(&dentry
->d_lock
);
4551 if (ret
&& di
->lease_session
&& di
->lease_session
->s_mds
== mds
) {
4552 dout("encode_dentry_release %p mds%d seq %d\n",
4553 dentry
, mds
, (int)di
->lease_seq
);
4554 rel
->dname_len
= cpu_to_le32(dentry
->d_name
.len
);
4555 memcpy(*p
, dentry
->d_name
.name
, dentry
->d_name
.len
);
4556 *p
+= dentry
->d_name
.len
;
4557 rel
->dname_seq
= cpu_to_le32(di
->lease_seq
);
4558 __ceph_mdsc_drop_dentry_lease(dentry
);
4560 spin_unlock(&dentry
->d_lock
);