1
2#include <linux/ceph/ceph_debug.h>
3
4#include <linux/fs.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>
12
13#include "super.h"
14#include "mds_client.h"
15#include "cache.h"
16#include <linux/ceph/decode.h>
17#include <linux/ceph/messenger.h>
18
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44
45static u64 __get_oldest_flush_tid(struct ceph_mds_client *mdsc);
46static 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);
50
51
52
53
54#define MAX_CAP_STR 20
55static char cap_str[MAX_CAP_STR][40];
56static DEFINE_SPINLOCK(cap_str_lock);
57static int last_cap_str;
58
59static char *gcap_string(char *s, int c)
60{
61 if (c & CEPH_CAP_GSHARED)
62 *s++ = 's';
63 if (c & CEPH_CAP_GEXCL)
64 *s++ = 'x';
65 if (c & CEPH_CAP_GCACHE)
66 *s++ = 'c';
67 if (c & CEPH_CAP_GRD)
68 *s++ = 'r';
69 if (c & CEPH_CAP_GWR)
70 *s++ = 'w';
71 if (c & CEPH_CAP_GBUFFER)
72 *s++ = 'b';
73 if (c & CEPH_CAP_GWREXTEND)
74 *s++ = 'a';
75 if (c & CEPH_CAP_GLAZYIO)
76 *s++ = 'l';
77 return s;
78}
79
80const char *ceph_cap_string(int caps)
81{
82 int i;
83 char *s;
84 int c;
85
86 spin_lock(&cap_str_lock);
87 i = last_cap_str++;
88 if (last_cap_str == MAX_CAP_STR)
89 last_cap_str = 0;
90 spin_unlock(&cap_str_lock);
91
92 s = cap_str[i];
93
94 if (caps & CEPH_CAP_PIN)
95 *s++ = 'p';
96
97 c = (caps >> CEPH_CAP_SAUTH) & 3;
98 if (c) {
99 *s++ = 'A';
100 s = gcap_string(s, c);
101 }
102
103 c = (caps >> CEPH_CAP_SLINK) & 3;
104 if (c) {
105 *s++ = 'L';
106 s = gcap_string(s, c);
107 }
108
109 c = (caps >> CEPH_CAP_SXATTR) & 3;
110 if (c) {
111 *s++ = 'X';
112 s = gcap_string(s, c);
113 }
114
115 c = caps >> CEPH_CAP_SFILE;
116 if (c) {
117 *s++ = 'F';
118 s = gcap_string(s, c);
119 }
120
121 if (s == cap_str[i])
122 *s++ = '-';
123 *s = 0;
124 return cap_str[i];
125}
126
127void ceph_caps_init(struct ceph_mds_client *mdsc)
128{
129 INIT_LIST_HEAD(&mdsc->caps_list);
130 spin_lock_init(&mdsc->caps_list_lock);
131}
132
133void ceph_caps_finalize(struct ceph_mds_client *mdsc)
134{
135 struct ceph_cap *cap;
136
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);
143 }
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);
150}
151
152void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
153 struct ceph_mount_options *fsopt)
154{
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);
164}
165
166static void __ceph_unreserve_caps(struct ceph_mds_client *mdsc, int nr_caps)
167{
168 struct ceph_cap *cap;
169 int i;
170
171 if (nr_caps) {
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);
182 }
183 } else {
184 mdsc->caps_avail_count += nr_caps;
185 }
186
187 dout("%s: caps %d = %d used + %d resv + %d avail\n",
188 __func__,
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);
194 }
195}
196
197
198
199
200int ceph_reserve_caps(struct ceph_mds_client *mdsc,
201 struct ceph_cap_reservation *ctx, int need)
202{
203 int i, j;
204 struct ceph_cap *cap;
205 int have;
206 int alloc = 0;
207 int max_caps;
208 int err = 0;
209 bool trimmed = false;
210 struct ceph_mds_session *s;
211 LIST_HEAD(newcaps);
212
213 dout("reserve caps ctx=%p need=%d\n", ctx, need);
214
215
216 spin_lock(&mdsc->caps_list_lock);
217 if (mdsc->caps_avail_count >= need)
218 have = need;
219 else
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);
227
228 for (i = have; i < need; ) {
229 cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS);
230 if (cap) {
231 list_add(&cap->caps_item, &newcaps);
232 alloc++;
233 i++;
234 continue;
235 }
236
237 if (!trimmed) {
238 for (j = 0; j < mdsc->max_sessions; j++) {
239 s = __ceph_lookup_mds_session(mdsc, j);
240 if (!s)
241 continue;
242 mutex_unlock(&mdsc->mutex);
243
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);
248
249 ceph_put_mds_session(s);
250 mutex_lock(&mdsc->mutex);
251 }
252 trimmed = true;
253
254 spin_lock(&mdsc->caps_list_lock);
255 if (mdsc->caps_avail_count) {
256 int more_have;
257 if (mdsc->caps_avail_count >= need - i)
258 more_have = need - i;
259 else
260 more_have = mdsc->caps_avail_count;
261
262 i += more_have;
263 have += more_have;
264 mdsc->caps_avail_count -= more_have;
265 mdsc->caps_reserve_count += more_have;
266
267 }
268 spin_unlock(&mdsc->caps_list_lock);
269
270 continue;
271 }
272
273 pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n",
274 ctx, need, have + alloc);
275 err = -ENOMEM;
276 break;
277 }
278
279 if (!err) {
280 BUG_ON(have + alloc != need);
281 ctx->count = need;
282 ctx->used = 0;
283 }
284
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);
289
290 BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count +
291 mdsc->caps_reserve_count +
292 mdsc->caps_avail_count);
293
294 if (err)
295 __ceph_unreserve_caps(mdsc, have + alloc);
296
297 spin_unlock(&mdsc->caps_list_lock);
298
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);
302 return err;
303}
304
305void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
306 struct ceph_cap_reservation *ctx)
307{
308 bool reclaim = false;
309 if (!ctx->count)
310 return;
311
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);
315 ctx->count = 0;
316
317 if (mdsc->caps_use_max > 0 &&
318 mdsc->caps_use_count > mdsc->caps_use_max)
319 reclaim = true;
320 spin_unlock(&mdsc->caps_list_lock);
321
322 if (reclaim)
323 ceph_reclaim_caps_nr(mdsc, ctx->used);
324}
325
326struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
327 struct ceph_cap_reservation *ctx)
328{
329 struct ceph_cap *cap = NULL;
330
331
332 if (!ctx) {
333 cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS);
334 if (cap) {
335 spin_lock(&mdsc->caps_list_lock);
336 mdsc->caps_use_count++;
337 mdsc->caps_total_count++;
338 spin_unlock(&mdsc->caps_list_lock);
339 } else {
340 spin_lock(&mdsc->caps_list_lock);
341 if (mdsc->caps_avail_count) {
342 BUG_ON(list_empty(&mdsc->caps_list));
343
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);
349
350 BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count +
351 mdsc->caps_reserve_count + mdsc->caps_avail_count);
352 }
353 spin_unlock(&mdsc->caps_list_lock);
354 }
355
356 return cap;
357 }
358
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);
363 BUG_ON(!ctx->count);
364 BUG_ON(ctx->count > mdsc->caps_reserve_count);
365 BUG_ON(list_empty(&mdsc->caps_list));
366
367 ctx->count--;
368 ctx->used++;
369 mdsc->caps_reserve_count--;
370 mdsc->caps_use_count++;
371
372 cap = list_first_entry(&mdsc->caps_list, struct ceph_cap, caps_item);
373 list_del(&cap->caps_item);
374
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);
378 return cap;
379}
380
381void ceph_put_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap)
382{
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--;
388
389
390
391
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);
396 } else {
397 mdsc->caps_avail_count++;
398 list_add(&cap->caps_item, &mdsc->caps_list);
399 }
400
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);
404}
405
406void ceph_reservation_status(struct ceph_fs_client *fsc,
407 int *total, int *avail, int *used, int *reserved,
408 int *min)
409{
410 struct ceph_mds_client *mdsc = fsc->mdsc;
411
412 spin_lock(&mdsc->caps_list_lock);
413
414 if (total)
415 *total = mdsc->caps_total_count;
416 if (avail)
417 *avail = mdsc->caps_avail_count;
418 if (used)
419 *used = mdsc->caps_use_count;
420 if (reserved)
421 *reserved = mdsc->caps_reserve_count;
422 if (min)
423 *min = mdsc->caps_min_count;
424
425 spin_unlock(&mdsc->caps_list_lock);
426}
427
428
429
430
431
432
433static struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, int mds)
434{
435 struct ceph_cap *cap;
436 struct rb_node *n = ci->i_caps.rb_node;
437
438 while (n) {
439 cap = rb_entry(n, struct ceph_cap, ci_node);
440 if (mds < cap->mds)
441 n = n->rb_left;
442 else if (mds > cap->mds)
443 n = n->rb_right;
444 else
445 return cap;
446 }
447 return NULL;
448}
449
450struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, int mds)
451{
452 struct ceph_cap *cap;
453
454 spin_lock(&ci->i_ceph_lock);
455 cap = __get_cap_for_mds(ci, mds);
456 spin_unlock(&ci->i_ceph_lock);
457 return cap;
458}
459
460
461
462
463static int __ceph_get_cap_mds(struct ceph_inode_info *ci)
464{
465 struct ceph_cap *cap;
466 int mds = -1;
467 struct rb_node *p;
468
469
470 for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) {
471 cap = rb_entry(p, struct ceph_cap, ci_node);
472 mds = cap->mds;
473 if (cap->issued & (CEPH_CAP_FILE_WR |
474 CEPH_CAP_FILE_BUFFER |
475 CEPH_CAP_FILE_EXCL))
476 break;
477 }
478 return mds;
479}
480
481int ceph_get_cap_mds(struct inode *inode)
482{
483 struct ceph_inode_info *ci = ceph_inode(inode);
484 int mds;
485 spin_lock(&ci->i_ceph_lock);
486 mds = __ceph_get_cap_mds(ceph_inode(inode));
487 spin_unlock(&ci->i_ceph_lock);
488 return mds;
489}
490
491
492
493
494static void __insert_cap_node(struct ceph_inode_info *ci,
495 struct ceph_cap *new)
496{
497 struct rb_node **p = &ci->i_caps.rb_node;
498 struct rb_node *parent = NULL;
499 struct ceph_cap *cap = NULL;
500
501 while (*p) {
502 parent = *p;
503 cap = rb_entry(parent, struct ceph_cap, ci_node);
504 if (new->mds < cap->mds)
505 p = &(*p)->rb_left;
506 else if (new->mds > cap->mds)
507 p = &(*p)->rb_right;
508 else
509 BUG();
510 }
511
512 rb_link_node(&new->ci_node, parent, p);
513 rb_insert_color(&new->ci_node, &ci->i_caps);
514}
515
516
517
518
519
520static void __cap_set_timeouts(struct ceph_mds_client *mdsc,
521 struct ceph_inode_info *ci)
522{
523 struct ceph_mount_options *opt = mdsc->fsc->mount_options;
524
525 ci->i_hold_caps_min = round_jiffies(jiffies +
526 opt->caps_wanted_delay_min * HZ);
527 ci->i_hold_caps_max = round_jiffies(jiffies +
528 opt->caps_wanted_delay_max * HZ);
529 dout("__cap_set_timeouts %p min %lu max %lu\n", &ci->vfs_inode,
530 ci->i_hold_caps_min - jiffies, ci->i_hold_caps_max - jiffies);
531}
532
533
534
535
536
537
538
539
540
541static void __cap_delay_requeue(struct ceph_mds_client *mdsc,
542 struct ceph_inode_info *ci,
543 bool set_timeout)
544{
545 dout("__cap_delay_requeue %p flags %d at %lu\n", &ci->vfs_inode,
546 ci->i_ceph_flags, ci->i_hold_caps_max);
547 if (!mdsc->stopping) {
548 spin_lock(&mdsc->cap_delay_lock);
549 if (!list_empty(&ci->i_cap_delay_list)) {
550 if (ci->i_ceph_flags & CEPH_I_FLUSH)
551 goto no_change;
552 list_del_init(&ci->i_cap_delay_list);
553 }
554 if (set_timeout)
555 __cap_set_timeouts(mdsc, ci);
556 list_add_tail(&ci->i_cap_delay_list, &mdsc->cap_delay_list);
557no_change:
558 spin_unlock(&mdsc->cap_delay_lock);
559 }
560}
561
562
563
564
565
566
567static void __cap_delay_requeue_front(struct ceph_mds_client *mdsc,
568 struct ceph_inode_info *ci)
569{
570 dout("__cap_delay_requeue_front %p\n", &ci->vfs_inode);
571 spin_lock(&mdsc->cap_delay_lock);
572 ci->i_ceph_flags |= CEPH_I_FLUSH;
573 if (!list_empty(&ci->i_cap_delay_list))
574 list_del_init(&ci->i_cap_delay_list);
575 list_add(&ci->i_cap_delay_list, &mdsc->cap_delay_list);
576 spin_unlock(&mdsc->cap_delay_lock);
577}
578
579
580
581
582
583
584static void __cap_delay_cancel(struct ceph_mds_client *mdsc,
585 struct ceph_inode_info *ci)
586{
587 dout("__cap_delay_cancel %p\n", &ci->vfs_inode);
588 if (list_empty(&ci->i_cap_delay_list))
589 return;
590 spin_lock(&mdsc->cap_delay_lock);
591 list_del_init(&ci->i_cap_delay_list);
592 spin_unlock(&mdsc->cap_delay_lock);
593}
594
595
596
597
598static void __check_cap_issue(struct ceph_inode_info *ci, struct ceph_cap *cap,
599 unsigned issued)
600{
601 unsigned had = __ceph_caps_issued(ci, NULL);
602
603
604
605
606
607 if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) &&
608 (had & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0) {
609 ci->i_rdcache_gen++;
610 }
611
612
613
614
615
616
617
618 if ((issued & CEPH_CAP_FILE_SHARED) != (had & CEPH_CAP_FILE_SHARED)) {
619 if (issued & CEPH_CAP_FILE_SHARED)
620 atomic_inc(&ci->i_shared_gen);
621 if (S_ISDIR(ci->vfs_inode.i_mode)) {
622 dout(" marking %p NOT complete\n", &ci->vfs_inode);
623 __ceph_dir_clear_complete(ci);
624 }
625 }
626}
627
628
629
630
631
632
633
634
635
636
637void ceph_add_cap(struct inode *inode,
638 struct ceph_mds_session *session, u64 cap_id,
639 int fmode, unsigned issued, unsigned wanted,
640 unsigned seq, unsigned mseq, u64 realmino, int flags,
641 struct ceph_cap **new_cap)
642{
643 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
644 struct ceph_inode_info *ci = ceph_inode(inode);
645 struct ceph_cap *cap;
646 int mds = session->s_mds;
647 int actual_wanted;
648
649 dout("add_cap %p mds%d cap %llx %s seq %d\n", inode,
650 session->s_mds, cap_id, ceph_cap_string(issued), seq);
651
652
653
654
655
656 if (fmode >= 0)
657 wanted |= ceph_caps_for_mode(fmode);
658
659 cap = __get_cap_for_mds(ci, mds);
660 if (!cap) {
661 cap = *new_cap;
662 *new_cap = NULL;
663
664 cap->issued = 0;
665 cap->implemented = 0;
666 cap->mds = mds;
667 cap->mds_wanted = 0;
668 cap->mseq = 0;
669
670 cap->ci = ci;
671 __insert_cap_node(ci, cap);
672
673
674 cap->session = session;
675 spin_lock(&session->s_cap_lock);
676 list_add_tail(&cap->session_caps, &session->s_caps);
677 session->s_nr_caps++;
678 spin_unlock(&session->s_cap_lock);
679 } else {
680 spin_lock(&session->s_cap_lock);
681 list_move_tail(&cap->session_caps, &session->s_caps);
682 spin_unlock(&session->s_cap_lock);
683
684 if (cap->cap_gen < session->s_cap_gen)
685 cap->issued = cap->implemented = CEPH_CAP_PIN;
686
687
688
689
690
691
692
693
694
695
696 if (ceph_seq_cmp(seq, cap->seq) <= 0) {
697 WARN_ON(cap != ci->i_auth_cap);
698 WARN_ON(cap->cap_id != cap_id);
699 seq = cap->seq;
700 mseq = cap->mseq;
701 issued |= cap->issued;
702 flags |= CEPH_CAP_FLAG_AUTH;
703 }
704 }
705
706 if (!ci->i_snap_realm ||
707 ((flags & CEPH_CAP_FLAG_AUTH) &&
708 realmino != (u64)-1 && ci->i_snap_realm->ino != realmino)) {
709
710
711
712 struct ceph_snap_realm *realm = ceph_lookup_snap_realm(mdsc,
713 realmino);
714 if (realm) {
715 struct ceph_snap_realm *oldrealm = ci->i_snap_realm;
716 if (oldrealm) {
717 spin_lock(&oldrealm->inodes_with_caps_lock);
718 list_del_init(&ci->i_snap_realm_item);
719 spin_unlock(&oldrealm->inodes_with_caps_lock);
720 }
721
722 spin_lock(&realm->inodes_with_caps_lock);
723 list_add(&ci->i_snap_realm_item,
724 &realm->inodes_with_caps);
725 ci->i_snap_realm = realm;
726 if (realm->ino == ci->i_vino.ino)
727 realm->inode = inode;
728 spin_unlock(&realm->inodes_with_caps_lock);
729
730 if (oldrealm)
731 ceph_put_snap_realm(mdsc, oldrealm);
732 } else {
733 pr_err("ceph_add_cap: couldn't find snap realm %llx\n",
734 realmino);
735 WARN_ON(!realm);
736 }
737 }
738
739 __check_cap_issue(ci, cap, issued);
740
741
742
743
744
745
746 actual_wanted = __ceph_caps_wanted(ci);
747 if ((wanted & ~actual_wanted) ||
748 (issued & ~actual_wanted & CEPH_CAP_ANY_WR)) {
749 dout(" issued %s, mds wanted %s, actual %s, queueing\n",
750 ceph_cap_string(issued), ceph_cap_string(wanted),
751 ceph_cap_string(actual_wanted));
752 __cap_delay_requeue(mdsc, ci, true);
753 }
754
755 if (flags & CEPH_CAP_FLAG_AUTH) {
756 if (!ci->i_auth_cap ||
757 ceph_seq_cmp(ci->i_auth_cap->mseq, mseq) < 0) {
758 ci->i_auth_cap = cap;
759 cap->mds_wanted = wanted;
760 }
761 } else {
762 WARN_ON(ci->i_auth_cap == cap);
763 }
764
765 dout("add_cap inode %p (%llx.%llx) cap %p %s now %s seq %d mds%d\n",
766 inode, ceph_vinop(inode), cap, ceph_cap_string(issued),
767 ceph_cap_string(issued|cap->issued), seq, mds);
768 cap->cap_id = cap_id;
769 cap->issued = issued;
770 cap->implemented |= issued;
771 if (ceph_seq_cmp(mseq, cap->mseq) > 0)
772 cap->mds_wanted = wanted;
773 else
774 cap->mds_wanted |= wanted;
775 cap->seq = seq;
776 cap->issue_seq = seq;
777 cap->mseq = mseq;
778 cap->cap_gen = session->s_cap_gen;
779
780 if (fmode >= 0)
781 __ceph_get_fmode(ci, fmode);
782}
783
784
785
786
787
788
789static int __cap_is_valid(struct ceph_cap *cap)
790{
791 unsigned long ttl;
792 u32 gen;
793
794 spin_lock(&cap->session->s_gen_ttl_lock);
795 gen = cap->session->s_cap_gen;
796 ttl = cap->session->s_cap_ttl;
797 spin_unlock(&cap->session->s_gen_ttl_lock);
798
799 if (cap->cap_gen < gen || time_after_eq(jiffies, ttl)) {
800 dout("__cap_is_valid %p cap %p issued %s "
801 "but STALE (gen %u vs %u)\n", &cap->ci->vfs_inode,
802 cap, ceph_cap_string(cap->issued), cap->cap_gen, gen);
803 return 0;
804 }
805
806 return 1;
807}
808
809
810
811
812
813
814int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented)
815{
816 int have = ci->i_snap_caps;
817 struct ceph_cap *cap;
818 struct rb_node *p;
819
820 if (implemented)
821 *implemented = 0;
822 for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) {
823 cap = rb_entry(p, struct ceph_cap, ci_node);
824 if (!__cap_is_valid(cap))
825 continue;
826 dout("__ceph_caps_issued %p cap %p issued %s\n",
827 &ci->vfs_inode, cap, ceph_cap_string(cap->issued));
828 have |= cap->issued;
829 if (implemented)
830 *implemented |= cap->implemented;
831 }
832
833
834
835
836
837 if (ci->i_auth_cap) {
838 cap = ci->i_auth_cap;
839 have &= ~cap->implemented | cap->issued;
840 }
841 return have;
842}
843
844
845
846
847int __ceph_caps_issued_other(struct ceph_inode_info *ci, struct ceph_cap *ocap)
848{
849 int have = ci->i_snap_caps;
850 struct ceph_cap *cap;
851 struct rb_node *p;
852
853 for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) {
854 cap = rb_entry(p, struct ceph_cap, ci_node);
855 if (cap == ocap)
856 continue;
857 if (!__cap_is_valid(cap))
858 continue;
859 have |= cap->issued;
860 }
861 return have;
862}
863
864
865
866
867
868static void __touch_cap(struct ceph_cap *cap)
869{
870 struct ceph_mds_session *s = cap->session;
871
872 spin_lock(&s->s_cap_lock);
873 if (!s->s_cap_iterator) {
874 dout("__touch_cap %p cap %p mds%d\n", &cap->ci->vfs_inode, cap,
875 s->s_mds);
876 list_move_tail(&cap->session_caps, &s->s_caps);
877 } else {
878 dout("__touch_cap %p cap %p mds%d NOP, iterating over caps\n",
879 &cap->ci->vfs_inode, cap, s->s_mds);
880 }
881 spin_unlock(&s->s_cap_lock);
882}
883
884
885
886
887
888
889int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch)
890{
891 struct ceph_cap *cap;
892 struct rb_node *p;
893 int have = ci->i_snap_caps;
894
895 if ((have & mask) == mask) {
896 dout("__ceph_caps_issued_mask ino 0x%lx snap issued %s"
897 " (mask %s)\n", ci->vfs_inode.i_ino,
898 ceph_cap_string(have),
899 ceph_cap_string(mask));
900 return 1;
901 }
902
903 for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) {
904 cap = rb_entry(p, struct ceph_cap, ci_node);
905 if (!__cap_is_valid(cap))
906 continue;
907 if ((cap->issued & mask) == mask) {
908 dout("__ceph_caps_issued_mask ino 0x%lx cap %p issued %s"
909 " (mask %s)\n", ci->vfs_inode.i_ino, cap,
910 ceph_cap_string(cap->issued),
911 ceph_cap_string(mask));
912 if (touch)
913 __touch_cap(cap);
914 return 1;
915 }
916
917
918 have |= cap->issued;
919 if ((have & mask) == mask) {
920 dout("__ceph_caps_issued_mask ino 0x%lx combo issued %s"
921 " (mask %s)\n", ci->vfs_inode.i_ino,
922 ceph_cap_string(cap->issued),
923 ceph_cap_string(mask));
924 if (touch) {
925 struct rb_node *q;
926
927
928 __touch_cap(cap);
929 for (q = rb_first(&ci->i_caps); q != p;
930 q = rb_next(q)) {
931 cap = rb_entry(q, struct ceph_cap,
932 ci_node);
933 if (!__cap_is_valid(cap))
934 continue;
935 __touch_cap(cap);
936 }
937 }
938 return 1;
939 }
940 }
941
942 return 0;
943}
944
945
946
947
948int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
949 struct ceph_cap *ocap, int mask)
950{
951 struct ceph_cap *cap;
952 struct rb_node *p;
953
954 for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) {
955 cap = rb_entry(p, struct ceph_cap, ci_node);
956 if (cap != ocap &&
957 (cap->implemented & ~cap->issued & mask))
958 return 1;
959 }
960 return 0;
961}
962
963int ceph_caps_revoking(struct ceph_inode_info *ci, int mask)
964{
965 struct inode *inode = &ci->vfs_inode;
966 int ret;
967
968 spin_lock(&ci->i_ceph_lock);
969 ret = __ceph_caps_revoking_other(ci, NULL, mask);
970 spin_unlock(&ci->i_ceph_lock);
971 dout("ceph_caps_revoking %p %s = %d\n", inode,
972 ceph_cap_string(mask), ret);
973 return ret;
974}
975
976int __ceph_caps_used(struct ceph_inode_info *ci)
977{
978 int used = 0;
979 if (ci->i_pin_ref)
980 used |= CEPH_CAP_PIN;
981 if (ci->i_rd_ref)
982 used |= CEPH_CAP_FILE_RD;
983 if (ci->i_rdcache_ref ||
984 (!S_ISDIR(ci->vfs_inode.i_mode) &&
985 ci->vfs_inode.i_data.nrpages))
986 used |= CEPH_CAP_FILE_CACHE;
987 if (ci->i_wr_ref)
988 used |= CEPH_CAP_FILE_WR;
989 if (ci->i_wb_ref || ci->i_wrbuffer_ref)
990 used |= CEPH_CAP_FILE_BUFFER;
991 return used;
992}
993
994
995
996
997int __ceph_caps_file_wanted(struct ceph_inode_info *ci)
998{
999 int i, bits = 0;
1000 for (i = 0; i < CEPH_FILE_MODE_BITS; i++) {
1001 if (ci->i_nr_by_mode[i])
1002 bits |= 1 << i;
1003 }
1004 if (bits == 0)
1005 return 0;
1006 return ceph_caps_for_mode(bits >> 1);
1007}
1008
1009
1010
1011
1012int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check)
1013{
1014 struct ceph_cap *cap;
1015 struct rb_node *p;
1016 int mds_wanted = 0;
1017
1018 for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) {
1019 cap = rb_entry(p, struct ceph_cap, ci_node);
1020 if (check && !__cap_is_valid(cap))
1021 continue;
1022 if (cap == ci->i_auth_cap)
1023 mds_wanted |= cap->mds_wanted;
1024 else
1025 mds_wanted |= (cap->mds_wanted & ~CEPH_CAP_ANY_FILE_WR);
1026 }
1027 return mds_wanted;
1028}
1029
1030
1031
1032
1033static int __ceph_is_single_caps(struct ceph_inode_info *ci)
1034{
1035 return rb_first(&ci->i_caps) == rb_last(&ci->i_caps);
1036}
1037
1038static int __ceph_is_any_caps(struct ceph_inode_info *ci)
1039{
1040 return !RB_EMPTY_ROOT(&ci->i_caps);
1041}
1042
1043int ceph_is_any_caps(struct inode *inode)
1044{
1045 struct ceph_inode_info *ci = ceph_inode(inode);
1046 int ret;
1047
1048 spin_lock(&ci->i_ceph_lock);
1049 ret = __ceph_is_any_caps(ci);
1050 spin_unlock(&ci->i_ceph_lock);
1051
1052 return ret;
1053}
1054
1055static void drop_inode_snap_realm(struct ceph_inode_info *ci)
1056{
1057 struct ceph_snap_realm *realm = ci->i_snap_realm;
1058 spin_lock(&realm->inodes_with_caps_lock);
1059 list_del_init(&ci->i_snap_realm_item);
1060 ci->i_snap_realm_counter++;
1061 ci->i_snap_realm = NULL;
1062 if (realm->ino == ci->i_vino.ino)
1063 realm->inode = NULL;
1064 spin_unlock(&realm->inodes_with_caps_lock);
1065 ceph_put_snap_realm(ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc,
1066 realm);
1067}
1068
1069
1070
1071
1072
1073
1074
1075void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release)
1076{
1077 struct ceph_mds_session *session = cap->session;
1078 struct ceph_inode_info *ci = cap->ci;
1079 struct ceph_mds_client *mdsc =
1080 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
1081 int removed = 0;
1082
1083 dout("__ceph_remove_cap %p from %p\n", cap, &ci->vfs_inode);
1084
1085
1086 spin_lock(&session->s_cap_lock);
1087 if (session->s_cap_iterator == cap) {
1088
1089 dout("__ceph_remove_cap delaying %p removal from session %p\n",
1090 cap, cap->session);
1091 } else {
1092 list_del_init(&cap->session_caps);
1093 session->s_nr_caps--;
1094 cap->session = NULL;
1095 removed = 1;
1096 }
1097
1098 cap->ci = NULL;
1099
1100
1101
1102
1103
1104 if (queue_release &&
1105 (!session->s_cap_reconnect || cap->cap_gen == session->s_cap_gen)) {
1106 cap->queue_release = 1;
1107 if (removed) {
1108 __ceph_queue_cap_release(session, cap);
1109 removed = 0;
1110 }
1111 } else {
1112 cap->queue_release = 0;
1113 }
1114 cap->cap_ino = ci->i_vino.ino;
1115
1116 spin_unlock(&session->s_cap_lock);
1117
1118
1119 rb_erase(&cap->ci_node, &ci->i_caps);
1120 if (ci->i_auth_cap == cap)
1121 ci->i_auth_cap = NULL;
1122
1123 if (removed)
1124 ceph_put_cap(mdsc, cap);
1125
1126
1127
1128
1129
1130 if (!__ceph_is_any_caps(ci) && ci->i_wr_ref == 0 && ci->i_snap_realm)
1131 drop_inode_snap_realm(ci);
1132
1133 if (!__ceph_is_any_real_caps(ci))
1134 __cap_delay_cancel(mdsc, ci);
1135}
1136
1137struct cap_msg_args {
1138 struct ceph_mds_session *session;
1139 u64 ino, cid, follows;
1140 u64 flush_tid, oldest_flush_tid, size, max_size;
1141 u64 xattr_version;
1142 u64 change_attr;
1143 struct ceph_buffer *xattr_buf;
1144 struct timespec64 atime, mtime, ctime, btime;
1145 int op, caps, wanted, dirty;
1146 u32 seq, issue_seq, mseq, time_warp_seq;
1147 u32 flags;
1148 kuid_t uid;
1149 kgid_t gid;
1150 umode_t mode;
1151 bool inline_data;
1152};
1153
1154
1155
1156
1157
1158
1159static int send_cap_msg(struct cap_msg_args *arg)
1160{
1161 struct ceph_mds_caps *fc;
1162 struct ceph_msg *msg;
1163 void *p;
1164 size_t extra_len;
1165 struct ceph_osd_client *osdc = &arg->session->s_mdsc->fsc->client->osdc;
1166
1167 dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s"
1168 " seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu"
1169 " xattr_ver %llu xattr_len %d\n", ceph_cap_op_name(arg->op),
1170 arg->cid, arg->ino, ceph_cap_string(arg->caps),
1171 ceph_cap_string(arg->wanted), ceph_cap_string(arg->dirty),
1172 arg->seq, arg->issue_seq, arg->flush_tid, arg->oldest_flush_tid,
1173 arg->mseq, arg->follows, arg->size, arg->max_size,
1174 arg->xattr_version,
1175 arg->xattr_buf ? (int)arg->xattr_buf->vec.iov_len : 0);
1176
1177
1178
1179 extra_len = 4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4;
1180 msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, sizeof(*fc) + extra_len,
1181 GFP_NOFS, false);
1182 if (!msg)
1183 return -ENOMEM;
1184
1185 msg->hdr.version = cpu_to_le16(10);
1186 msg->hdr.tid = cpu_to_le64(arg->flush_tid);
1187
1188 fc = msg->front.iov_base;
1189 memset(fc, 0, sizeof(*fc));
1190
1191 fc->cap_id = cpu_to_le64(arg->cid);
1192 fc->op = cpu_to_le32(arg->op);
1193 fc->seq = cpu_to_le32(arg->seq);
1194 fc->issue_seq = cpu_to_le32(arg->issue_seq);
1195 fc->migrate_seq = cpu_to_le32(arg->mseq);
1196 fc->caps = cpu_to_le32(arg->caps);
1197 fc->wanted = cpu_to_le32(arg->wanted);
1198 fc->dirty = cpu_to_le32(arg->dirty);
1199 fc->ino = cpu_to_le64(arg->ino);
1200 fc->snap_follows = cpu_to_le64(arg->follows);
1201
1202 fc->size = cpu_to_le64(arg->size);
1203 fc->max_size = cpu_to_le64(arg->max_size);
1204 ceph_encode_timespec64(&fc->mtime, &arg->mtime);
1205 ceph_encode_timespec64(&fc->atime, &arg->atime);
1206 ceph_encode_timespec64(&fc->ctime, &arg->ctime);
1207 fc->time_warp_seq = cpu_to_le32(arg->time_warp_seq);
1208
1209 fc->uid = cpu_to_le32(from_kuid(&init_user_ns, arg->uid));
1210 fc->gid = cpu_to_le32(from_kgid(&init_user_ns, arg->gid));
1211 fc->mode = cpu_to_le32(arg->mode);
1212
1213 fc->xattr_version = cpu_to_le64(arg->xattr_version);
1214 if (arg->xattr_buf) {
1215 msg->middle = ceph_buffer_get(arg->xattr_buf);
1216 fc->xattr_len = cpu_to_le32(arg->xattr_buf->vec.iov_len);
1217 msg->hdr.middle_len = cpu_to_le32(arg->xattr_buf->vec.iov_len);
1218 }
1219
1220 p = fc + 1;
1221
1222 ceph_encode_32(&p, 0);
1223
1224 ceph_encode_64(&p, arg->inline_data ? 0 : CEPH_INLINE_NONE);
1225
1226 ceph_encode_32(&p, 0);
1227
1228
1229
1230
1231
1232 ceph_encode_32(&p, READ_ONCE(osdc->epoch_barrier));
1233
1234 ceph_encode_64(&p, arg->oldest_flush_tid);
1235
1236
1237
1238
1239
1240
1241
1242
1243 ceph_encode_32(&p, 0);
1244 ceph_encode_32(&p, 0);
1245
1246
1247 ceph_encode_32(&p, 0);
1248
1249
1250 ceph_encode_timespec64(p, &arg->btime);
1251 p += sizeof(struct ceph_timespec);
1252 ceph_encode_64(&p, arg->change_attr);
1253
1254
1255 ceph_encode_32(&p, arg->flags);
1256
1257 ceph_con_send(&arg->session->s_con, msg);
1258 return 0;
1259}
1260
1261
1262
1263
1264void __ceph_remove_caps(struct ceph_inode_info *ci)
1265{
1266 struct rb_node *p;
1267
1268
1269
1270 spin_lock(&ci->i_ceph_lock);
1271 p = rb_first(&ci->i_caps);
1272 while (p) {
1273 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node);
1274 p = rb_next(p);
1275 __ceph_remove_cap(cap, true);
1276 }
1277 spin_unlock(&ci->i_ceph_lock);
1278}
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap,
1298 int op, int flags, int used, int want, int retain,
1299 int flushing, u64 flush_tid, u64 oldest_flush_tid)
1300 __releases(cap->ci->i_ceph_lock)
1301{
1302 struct ceph_inode_info *ci = cap->ci;
1303 struct inode *inode = &ci->vfs_inode;
1304 struct ceph_buffer *old_blob = NULL;
1305 struct cap_msg_args arg;
1306 int held, revoking;
1307 int wake = 0;
1308 int delayed = 0;
1309 int ret;
1310
1311 held = cap->issued | cap->implemented;
1312 revoking = cap->implemented & ~cap->issued;
1313 retain &= ~revoking;
1314
1315 dout("__send_cap %p cap %p session %p %s -> %s (revoking %s)\n",
1316 inode, cap, cap->session,
1317 ceph_cap_string(held), ceph_cap_string(held & retain),
1318 ceph_cap_string(revoking));
1319 BUG_ON((retain & CEPH_CAP_PIN) == 0);
1320
1321 arg.session = cap->session;
1322
1323
1324 if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 &&
1325 time_before(jiffies, ci->i_hold_caps_min)) {
1326 dout(" delaying issued %s -> %s, wanted %s -> %s on send\n",
1327 ceph_cap_string(cap->issued),
1328 ceph_cap_string(cap->issued & retain),
1329 ceph_cap_string(cap->mds_wanted),
1330 ceph_cap_string(want));
1331 want |= cap->mds_wanted;
1332 retain |= cap->issued;
1333 delayed = 1;
1334 }
1335 ci->i_ceph_flags &= ~(CEPH_I_NODELAY | CEPH_I_FLUSH);
1336 if (want & ~cap->mds_wanted) {
1337
1338
1339
1340
1341 __cap_set_timeouts(mdsc, ci);
1342 }
1343
1344 cap->issued &= retain;
1345 if (cap->implemented & ~cap->issued) {
1346
1347
1348
1349
1350
1351
1352 wake = 1;
1353 }
1354 cap->implemented &= cap->issued | used;
1355 cap->mds_wanted = want;
1356
1357 arg.ino = ceph_vino(inode).ino;
1358 arg.cid = cap->cap_id;
1359 arg.follows = flushing ? ci->i_head_snapc->seq : 0;
1360 arg.flush_tid = flush_tid;
1361 arg.oldest_flush_tid = oldest_flush_tid;
1362
1363 arg.size = inode->i_size;
1364 ci->i_reported_size = arg.size;
1365 arg.max_size = ci->i_wanted_max_size;
1366 ci->i_requested_max_size = arg.max_size;
1367
1368 if (flushing & CEPH_CAP_XATTR_EXCL) {
1369 old_blob = __ceph_build_xattrs_blob(ci);
1370 arg.xattr_version = ci->i_xattrs.version;
1371 arg.xattr_buf = ci->i_xattrs.blob;
1372 } else {
1373 arg.xattr_buf = NULL;
1374 }
1375
1376 arg.mtime = inode->i_mtime;
1377 arg.atime = inode->i_atime;
1378 arg.ctime = inode->i_ctime;
1379 arg.btime = ci->i_btime;
1380 arg.change_attr = inode_peek_iversion_raw(inode);
1381
1382 arg.op = op;
1383 arg.caps = cap->implemented;
1384 arg.wanted = want;
1385 arg.dirty = flushing;
1386
1387 arg.seq = cap->seq;
1388 arg.issue_seq = cap->issue_seq;
1389 arg.mseq = cap->mseq;
1390 arg.time_warp_seq = ci->i_time_warp_seq;
1391
1392 arg.uid = inode->i_uid;
1393 arg.gid = inode->i_gid;
1394 arg.mode = inode->i_mode;
1395
1396 arg.inline_data = ci->i_inline_version != CEPH_INLINE_NONE;
1397 if (!(flags & CEPH_CLIENT_CAPS_PENDING_CAPSNAP) &&
1398 !list_empty(&ci->i_cap_snaps)) {
1399 struct ceph_cap_snap *capsnap;
1400 list_for_each_entry_reverse(capsnap, &ci->i_cap_snaps, ci_item) {
1401 if (capsnap->cap_flush.tid)
1402 break;
1403 if (capsnap->need_flush) {
1404 flags |= CEPH_CLIENT_CAPS_PENDING_CAPSNAP;
1405 break;
1406 }
1407 }
1408 }
1409 arg.flags = flags;
1410
1411 spin_unlock(&ci->i_ceph_lock);
1412
1413 ceph_buffer_put(old_blob);
1414
1415 ret = send_cap_msg(&arg);
1416 if (ret < 0) {
1417 dout("error sending cap msg, must requeue %p\n", inode);
1418 delayed = 1;
1419 }
1420
1421 if (wake)
1422 wake_up_all(&ci->i_cap_wq);
1423
1424 return delayed;
1425}
1426
1427static inline int __send_flush_snap(struct inode *inode,
1428 struct ceph_mds_session *session,
1429 struct ceph_cap_snap *capsnap,
1430 u32 mseq, u64 oldest_flush_tid)
1431{
1432 struct cap_msg_args arg;
1433
1434 arg.session = session;
1435 arg.ino = ceph_vino(inode).ino;
1436 arg.cid = 0;
1437 arg.follows = capsnap->follows;
1438 arg.flush_tid = capsnap->cap_flush.tid;
1439 arg.oldest_flush_tid = oldest_flush_tid;
1440
1441 arg.size = capsnap->size;
1442 arg.max_size = 0;
1443 arg.xattr_version = capsnap->xattr_version;
1444 arg.xattr_buf = capsnap->xattr_blob;
1445
1446 arg.atime = capsnap->atime;
1447 arg.mtime = capsnap->mtime;
1448 arg.ctime = capsnap->ctime;
1449 arg.btime = capsnap->btime;
1450 arg.change_attr = capsnap->change_attr;
1451
1452 arg.op = CEPH_CAP_OP_FLUSHSNAP;
1453 arg.caps = capsnap->issued;
1454 arg.wanted = 0;
1455 arg.dirty = capsnap->dirty;
1456
1457 arg.seq = 0;
1458 arg.issue_seq = 0;
1459 arg.mseq = mseq;
1460 arg.time_warp_seq = capsnap->time_warp_seq;
1461
1462 arg.uid = capsnap->uid;
1463 arg.gid = capsnap->gid;
1464 arg.mode = capsnap->mode;
1465
1466 arg.inline_data = capsnap->inline_data;
1467 arg.flags = 0;
1468
1469 return send_cap_msg(&arg);
1470}
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481static void __ceph_flush_snaps(struct ceph_inode_info *ci,
1482 struct ceph_mds_session *session)
1483 __releases(ci->i_ceph_lock)
1484 __acquires(ci->i_ceph_lock)
1485{
1486 struct inode *inode = &ci->vfs_inode;
1487 struct ceph_mds_client *mdsc = session->s_mdsc;
1488 struct ceph_cap_snap *capsnap;
1489 u64 oldest_flush_tid = 0;
1490 u64 first_tid = 1, last_tid = 0;
1491
1492 dout("__flush_snaps %p session %p\n", inode, session);
1493
1494 list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
1495
1496
1497
1498
1499 if (capsnap->dirty_pages || capsnap->writing)
1500 break;
1501
1502
1503 BUG_ON(!capsnap->need_flush);
1504
1505
1506 if (capsnap->cap_flush.tid > 0) {
1507 dout(" already flushed %p, skipping\n", capsnap);
1508 continue;
1509 }
1510
1511 spin_lock(&mdsc->cap_dirty_lock);
1512 capsnap->cap_flush.tid = ++mdsc->last_cap_flush_tid;
1513 list_add_tail(&capsnap->cap_flush.g_list,
1514 &mdsc->cap_flush_list);
1515 if (oldest_flush_tid == 0)
1516 oldest_flush_tid = __get_oldest_flush_tid(mdsc);
1517 if (list_empty(&ci->i_flushing_item)) {
1518 list_add_tail(&ci->i_flushing_item,
1519 &session->s_cap_flushing);
1520 }
1521 spin_unlock(&mdsc->cap_dirty_lock);
1522
1523 list_add_tail(&capsnap->cap_flush.i_list,
1524 &ci->i_cap_flush_list);
1525
1526 if (first_tid == 1)
1527 first_tid = capsnap->cap_flush.tid;
1528 last_tid = capsnap->cap_flush.tid;
1529 }
1530
1531 ci->i_ceph_flags &= ~CEPH_I_FLUSH_SNAPS;
1532
1533 while (first_tid <= last_tid) {
1534 struct ceph_cap *cap = ci->i_auth_cap;
1535 struct ceph_cap_flush *cf;
1536 int ret;
1537
1538 if (!(cap && cap->session == session)) {
1539 dout("__flush_snaps %p auth cap %p not mds%d, "
1540 "stop\n", inode, cap, session->s_mds);
1541 break;
1542 }
1543
1544 ret = -ENOENT;
1545 list_for_each_entry(cf, &ci->i_cap_flush_list, i_list) {
1546 if (cf->tid >= first_tid) {
1547 ret = 0;
1548 break;
1549 }
1550 }
1551 if (ret < 0)
1552 break;
1553
1554 first_tid = cf->tid + 1;
1555
1556 capsnap = container_of(cf, struct ceph_cap_snap, cap_flush);
1557 refcount_inc(&capsnap->nref);
1558 spin_unlock(&ci->i_ceph_lock);
1559
1560 dout("__flush_snaps %p capsnap %p tid %llu %s\n",
1561 inode, capsnap, cf->tid, ceph_cap_string(capsnap->dirty));
1562
1563 ret = __send_flush_snap(inode, session, capsnap, cap->mseq,
1564 oldest_flush_tid);
1565 if (ret < 0) {
1566 pr_err("__flush_snaps: error sending cap flushsnap, "
1567 "ino (%llx.%llx) tid %llu follows %llu\n",
1568 ceph_vinop(inode), cf->tid, capsnap->follows);
1569 }
1570
1571 ceph_put_cap_snap(capsnap);
1572 spin_lock(&ci->i_ceph_lock);
1573 }
1574}
1575
1576void ceph_flush_snaps(struct ceph_inode_info *ci,
1577 struct ceph_mds_session **psession)
1578{
1579 struct inode *inode = &ci->vfs_inode;
1580 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
1581 struct ceph_mds_session *session = NULL;
1582 int mds;
1583
1584 dout("ceph_flush_snaps %p\n", inode);
1585 if (psession)
1586 session = *psession;
1587retry:
1588 spin_lock(&ci->i_ceph_lock);
1589 if (!(ci->i_ceph_flags & CEPH_I_FLUSH_SNAPS)) {
1590 dout(" no capsnap needs flush, doing nothing\n");
1591 goto out;
1592 }
1593 if (!ci->i_auth_cap) {
1594 dout(" no auth cap (migrating?), doing nothing\n");
1595 goto out;
1596 }
1597
1598 mds = ci->i_auth_cap->session->s_mds;
1599 if (session && session->s_mds != mds) {
1600 dout(" oops, wrong session %p mutex\n", session);
1601 mutex_unlock(&session->s_mutex);
1602 ceph_put_mds_session(session);
1603 session = NULL;
1604 }
1605 if (!session) {
1606 spin_unlock(&ci->i_ceph_lock);
1607 mutex_lock(&mdsc->mutex);
1608 session = __ceph_lookup_mds_session(mdsc, mds);
1609 mutex_unlock(&mdsc->mutex);
1610 if (session) {
1611 dout(" inverting session/ino locks on %p\n", session);
1612 mutex_lock(&session->s_mutex);
1613 }
1614 goto retry;
1615 }
1616
1617
1618 if (ci->i_ceph_flags & CEPH_I_KICK_FLUSH)
1619 __kick_flushing_caps(mdsc, session, ci, 0);
1620
1621 __ceph_flush_snaps(ci, session);
1622out:
1623 spin_unlock(&ci->i_ceph_lock);
1624
1625 if (psession) {
1626 *psession = session;
1627 } else if (session) {
1628 mutex_unlock(&session->s_mutex);
1629 ceph_put_mds_session(session);
1630 }
1631
1632 spin_lock(&mdsc->snap_flush_lock);
1633 list_del_init(&ci->i_snap_flush_item);
1634 spin_unlock(&mdsc->snap_flush_lock);
1635}
1636
1637
1638
1639
1640
1641
1642int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
1643 struct ceph_cap_flush **pcf)
1644{
1645 struct ceph_mds_client *mdsc =
1646 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
1647 struct inode *inode = &ci->vfs_inode;
1648 int was = ci->i_dirty_caps;
1649 int dirty = 0;
1650
1651 if (!ci->i_auth_cap) {
1652 pr_warn("__mark_dirty_caps %p %llx mask %s, "
1653 "but no auth cap (session was closed?)\n",
1654 inode, ceph_ino(inode), ceph_cap_string(mask));
1655 return 0;
1656 }
1657
1658 dout("__mark_dirty_caps %p %s dirty %s -> %s\n", &ci->vfs_inode,
1659 ceph_cap_string(mask), ceph_cap_string(was),
1660 ceph_cap_string(was | mask));
1661 ci->i_dirty_caps |= mask;
1662 if (was == 0) {
1663 WARN_ON_ONCE(ci->i_prealloc_cap_flush);
1664 swap(ci->i_prealloc_cap_flush, *pcf);
1665
1666 if (!ci->i_head_snapc) {
1667 WARN_ON_ONCE(!rwsem_is_locked(&mdsc->snap_rwsem));
1668 ci->i_head_snapc = ceph_get_snap_context(
1669 ci->i_snap_realm->cached_context);
1670 }
1671 dout(" inode %p now dirty snapc %p auth cap %p\n",
1672 &ci->vfs_inode, ci->i_head_snapc, ci->i_auth_cap);
1673 BUG_ON(!list_empty(&ci->i_dirty_item));
1674 spin_lock(&mdsc->cap_dirty_lock);
1675 list_add(&ci->i_dirty_item, &mdsc->cap_dirty);
1676 spin_unlock(&mdsc->cap_dirty_lock);
1677 if (ci->i_flushing_caps == 0) {
1678 ihold(inode);
1679 dirty |= I_DIRTY_SYNC;
1680 }
1681 } else {
1682 WARN_ON_ONCE(!ci->i_prealloc_cap_flush);
1683 }
1684 BUG_ON(list_empty(&ci->i_dirty_item));
1685 if (((was | ci->i_flushing_caps) & CEPH_CAP_FILE_BUFFER) &&
1686 (mask & CEPH_CAP_FILE_BUFFER))
1687 dirty |= I_DIRTY_DATASYNC;
1688 __cap_delay_requeue(mdsc, ci, true);
1689 return dirty;
1690}
1691
1692struct ceph_cap_flush *ceph_alloc_cap_flush(void)
1693{
1694 return kmem_cache_alloc(ceph_cap_flush_cachep, GFP_KERNEL);
1695}
1696
1697void ceph_free_cap_flush(struct ceph_cap_flush *cf)
1698{
1699 if (cf)
1700 kmem_cache_free(ceph_cap_flush_cachep, cf);
1701}
1702
1703static u64 __get_oldest_flush_tid(struct ceph_mds_client *mdsc)
1704{
1705 if (!list_empty(&mdsc->cap_flush_list)) {
1706 struct ceph_cap_flush *cf =
1707 list_first_entry(&mdsc->cap_flush_list,
1708 struct ceph_cap_flush, g_list);
1709 return cf->tid;
1710 }
1711 return 0;
1712}
1713
1714
1715
1716
1717
1718static bool __finish_cap_flush(struct ceph_mds_client *mdsc,
1719 struct ceph_inode_info *ci,
1720 struct ceph_cap_flush *cf)
1721{
1722 struct ceph_cap_flush *prev;
1723 bool wake = cf->wake;
1724 if (mdsc) {
1725
1726 if (wake && cf->g_list.prev != &mdsc->cap_flush_list) {
1727 prev = list_prev_entry(cf, g_list);
1728 prev->wake = true;
1729 wake = false;
1730 }
1731 list_del(&cf->g_list);
1732 } else if (ci) {
1733 if (wake && cf->i_list.prev != &ci->i_cap_flush_list) {
1734 prev = list_prev_entry(cf, i_list);
1735 prev->wake = true;
1736 wake = false;
1737 }
1738 list_del(&cf->i_list);
1739 } else {
1740 BUG_ON(1);
1741 }
1742 return wake;
1743}
1744
1745
1746
1747
1748
1749
1750
1751static int __mark_caps_flushing(struct inode *inode,
1752 struct ceph_mds_session *session, bool wake,
1753 u64 *flush_tid, u64 *oldest_flush_tid)
1754{
1755 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
1756 struct ceph_inode_info *ci = ceph_inode(inode);
1757 struct ceph_cap_flush *cf = NULL;
1758 int flushing;
1759
1760 BUG_ON(ci->i_dirty_caps == 0);
1761 BUG_ON(list_empty(&ci->i_dirty_item));
1762 BUG_ON(!ci->i_prealloc_cap_flush);
1763
1764 flushing = ci->i_dirty_caps;
1765 dout("__mark_caps_flushing flushing %s, flushing_caps %s -> %s\n",
1766 ceph_cap_string(flushing),
1767 ceph_cap_string(ci->i_flushing_caps),
1768 ceph_cap_string(ci->i_flushing_caps | flushing));
1769 ci->i_flushing_caps |= flushing;
1770 ci->i_dirty_caps = 0;
1771 dout(" inode %p now !dirty\n", inode);
1772
1773 swap(cf, ci->i_prealloc_cap_flush);
1774 cf->caps = flushing;
1775 cf->wake = wake;
1776
1777 spin_lock(&mdsc->cap_dirty_lock);
1778 list_del_init(&ci->i_dirty_item);
1779
1780 cf->tid = ++mdsc->last_cap_flush_tid;
1781 list_add_tail(&cf->g_list, &mdsc->cap_flush_list);
1782 *oldest_flush_tid = __get_oldest_flush_tid(mdsc);
1783
1784 if (list_empty(&ci->i_flushing_item)) {
1785 list_add_tail(&ci->i_flushing_item, &session->s_cap_flushing);
1786 mdsc->num_cap_flushing++;
1787 }
1788 spin_unlock(&mdsc->cap_dirty_lock);
1789
1790 list_add_tail(&cf->i_list, &ci->i_cap_flush_list);
1791
1792 *flush_tid = cf->tid;
1793 return flushing;
1794}
1795
1796
1797
1798
1799static int try_nonblocking_invalidate(struct inode *inode)
1800{
1801 struct ceph_inode_info *ci = ceph_inode(inode);
1802 u32 invalidating_gen = ci->i_rdcache_gen;
1803
1804 spin_unlock(&ci->i_ceph_lock);
1805 invalidate_mapping_pages(&inode->i_data, 0, -1);
1806 spin_lock(&ci->i_ceph_lock);
1807
1808 if (inode->i_data.nrpages == 0 &&
1809 invalidating_gen == ci->i_rdcache_gen) {
1810
1811 dout("try_nonblocking_invalidate %p success\n", inode);
1812
1813 ci->i_rdcache_revoking = ci->i_rdcache_gen - 1;
1814 return 0;
1815 }
1816 dout("try_nonblocking_invalidate %p failed\n", inode);
1817 return -1;
1818}
1819
1820bool __ceph_should_report_size(struct ceph_inode_info *ci)
1821{
1822 loff_t size = ci->vfs_inode.i_size;
1823
1824 if (ci->i_flushing_caps & CEPH_CAP_FILE_WR)
1825 return false;
1826 if (size >= ci->i_max_size)
1827 return true;
1828
1829 if (ci->i_max_size > ci->i_reported_size &&
1830 (size << 1) >= ci->i_max_size + ci->i_reported_size)
1831 return true;
1832 return false;
1833}
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846void ceph_check_caps(struct ceph_inode_info *ci, int flags,
1847 struct ceph_mds_session *session)
1848{
1849 struct ceph_fs_client *fsc = ceph_inode_to_client(&ci->vfs_inode);
1850 struct ceph_mds_client *mdsc = fsc->mdsc;
1851 struct inode *inode = &ci->vfs_inode;
1852 struct ceph_cap *cap;
1853 u64 flush_tid, oldest_flush_tid;
1854 int file_wanted, used, cap_used;
1855 int took_snap_rwsem = 0;
1856 int issued, implemented, want, retain, revoking, flushing = 0;
1857 int mds = -1;
1858
1859 struct rb_node *p;
1860 int delayed = 0, sent = 0;
1861 bool no_delay = flags & CHECK_CAPS_NODELAY;
1862 bool queue_invalidate = false;
1863 bool tried_invalidate = false;
1864
1865
1866 if (mdsc->stopping)
1867 no_delay = true;
1868
1869 spin_lock(&ci->i_ceph_lock);
1870
1871 if (ci->i_ceph_flags & CEPH_I_FLUSH)
1872 flags |= CHECK_CAPS_FLUSH;
1873
1874 if (!(flags & CHECK_CAPS_AUTHONLY) ||
1875 (ci->i_auth_cap && __ceph_is_single_caps(ci)))
1876 __cap_delay_cancel(mdsc, ci);
1877
1878 goto retry_locked;
1879retry:
1880 spin_lock(&ci->i_ceph_lock);
1881retry_locked:
1882 file_wanted = __ceph_caps_file_wanted(ci);
1883 used = __ceph_caps_used(ci);
1884 issued = __ceph_caps_issued(ci, &implemented);
1885 revoking = implemented & ~issued;
1886
1887 want = file_wanted;
1888 retain = file_wanted | used | CEPH_CAP_PIN;
1889 if (!mdsc->stopping && inode->i_nlink > 0) {
1890 if (file_wanted) {
1891 retain |= CEPH_CAP_ANY;
1892 } else if (S_ISDIR(inode->i_mode) &&
1893 (issued & CEPH_CAP_FILE_SHARED) &&
1894 __ceph_dir_is_complete(ci)) {
1895
1896
1897
1898
1899
1900
1901 if (IS_RDONLY(inode))
1902 want = CEPH_CAP_ANY_SHARED;
1903 else
1904 want = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL;
1905 retain |= want;
1906 } else {
1907
1908 retain |= CEPH_CAP_ANY_SHARED;
1909
1910
1911
1912
1913
1914 if (ci->i_max_size == 0)
1915 retain |= CEPH_CAP_ANY_RD;
1916 }
1917 }
1918
1919 dout("check_caps %p file_want %s used %s dirty %s flushing %s"
1920 " issued %s revoking %s retain %s %s%s%s\n", inode,
1921 ceph_cap_string(file_wanted),
1922 ceph_cap_string(used), ceph_cap_string(ci->i_dirty_caps),
1923 ceph_cap_string(ci->i_flushing_caps),
1924 ceph_cap_string(issued), ceph_cap_string(revoking),
1925 ceph_cap_string(retain),
1926 (flags & CHECK_CAPS_AUTHONLY) ? " AUTHONLY" : "",
1927 (flags & CHECK_CAPS_NODELAY) ? " NODELAY" : "",
1928 (flags & CHECK_CAPS_FLUSH) ? " FLUSH" : "");
1929
1930
1931
1932
1933
1934
1935 if ((!no_delay || mdsc->stopping) &&
1936 !S_ISDIR(inode->i_mode) &&
1937 !(ci->i_wb_ref || ci->i_wrbuffer_ref) &&
1938 inode->i_data.nrpages &&
1939 (revoking & (CEPH_CAP_FILE_CACHE|
1940 CEPH_CAP_FILE_LAZYIO)) &&
1941 !tried_invalidate) {
1942 dout("check_caps trying to invalidate on %p\n", inode);
1943 if (try_nonblocking_invalidate(inode) < 0) {
1944 dout("check_caps queuing invalidate\n");
1945 queue_invalidate = true;
1946 ci->i_rdcache_revoking = ci->i_rdcache_gen;
1947 }
1948 tried_invalidate = true;
1949 goto retry_locked;
1950 }
1951
1952 for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) {
1953 cap = rb_entry(p, struct ceph_cap, ci_node);
1954
1955
1956 if (mds >= cap->mds ||
1957 ((flags & CHECK_CAPS_AUTHONLY) && cap != ci->i_auth_cap))
1958 continue;
1959
1960
1961
1962 cap_used = used;
1963 if (ci->i_auth_cap && cap != ci->i_auth_cap)
1964 cap_used &= ~ci->i_auth_cap->issued;
1965
1966 revoking = cap->implemented & ~cap->issued;
1967 dout(" mds%d cap %p used %s issued %s implemented %s revoking %s\n",
1968 cap->mds, cap, ceph_cap_string(cap_used),
1969 ceph_cap_string(cap->issued),
1970 ceph_cap_string(cap->implemented),
1971 ceph_cap_string(revoking));
1972
1973 if (cap == ci->i_auth_cap &&
1974 (cap->issued & CEPH_CAP_FILE_WR)) {
1975
1976 if (ci->i_wanted_max_size > ci->i_max_size &&
1977 ci->i_wanted_max_size > ci->i_requested_max_size) {
1978 dout("requesting new max_size\n");
1979 goto ack;
1980 }
1981
1982
1983 if (__ceph_should_report_size(ci)) {
1984 dout("i_size approaching max_size\n");
1985 goto ack;
1986 }
1987 }
1988
1989 if (cap == ci->i_auth_cap) {
1990 if ((flags & CHECK_CAPS_FLUSH) && ci->i_dirty_caps) {
1991 dout("flushing dirty caps\n");
1992 goto ack;
1993 }
1994 if (ci->i_ceph_flags & CEPH_I_FLUSH_SNAPS) {
1995 dout("flushing snap caps\n");
1996 goto ack;
1997 }
1998 }
1999
2000
2001 if (revoking && (revoking & cap_used) == 0) {
2002 dout("completed revocation of %s\n",
2003 ceph_cap_string(cap->implemented & ~cap->issued));
2004 goto ack;
2005 }
2006
2007
2008 if (want & ~(cap->mds_wanted | cap->issued))
2009 goto ack;
2010
2011
2012 if ((cap->issued & ~retain) == 0)
2013 continue;
2014
2015 if (no_delay)
2016 goto ack;
2017
2018
2019 if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0 &&
2020 time_before(jiffies, ci->i_hold_caps_max)) {
2021 dout(" delaying issued %s -> %s, wanted %s -> %s\n",
2022 ceph_cap_string(cap->issued),
2023 ceph_cap_string(cap->issued & retain),
2024 ceph_cap_string(cap->mds_wanted),
2025 ceph_cap_string(want));
2026 delayed++;
2027 continue;
2028 }
2029
2030ack:
2031 if (ci->i_ceph_flags & CEPH_I_NOFLUSH) {
2032 dout(" skipping %p I_NOFLUSH set\n", inode);
2033 continue;
2034 }
2035
2036 if (session && session != cap->session) {
2037 dout("oops, wrong session %p mutex\n", session);
2038 mutex_unlock(&session->s_mutex);
2039 session = NULL;
2040 }
2041 if (!session) {
2042 session = cap->session;
2043 if (mutex_trylock(&session->s_mutex) == 0) {
2044 dout("inverting session/ino locks on %p\n",
2045 session);
2046 spin_unlock(&ci->i_ceph_lock);
2047 if (took_snap_rwsem) {
2048 up_read(&mdsc->snap_rwsem);
2049 took_snap_rwsem = 0;
2050 }
2051 mutex_lock(&session->s_mutex);
2052 goto retry;
2053 }
2054 }
2055
2056
2057
2058 if (cap == ci->i_auth_cap &&
2059 (ci->i_ceph_flags &
2060 (CEPH_I_KICK_FLUSH | CEPH_I_FLUSH_SNAPS))) {
2061 if (ci->i_ceph_flags & CEPH_I_KICK_FLUSH)
2062 __kick_flushing_caps(mdsc, session, ci, 0);
2063 if (ci->i_ceph_flags & CEPH_I_FLUSH_SNAPS)
2064 __ceph_flush_snaps(ci, session);
2065
2066 goto retry_locked;
2067 }
2068
2069
2070 if (!took_snap_rwsem) {
2071 if (down_read_trylock(&mdsc->snap_rwsem) == 0) {
2072 dout("inverting snap/in locks on %p\n",
2073 inode);
2074 spin_unlock(&ci->i_ceph_lock);
2075 down_read(&mdsc->snap_rwsem);
2076 took_snap_rwsem = 1;
2077 goto retry;
2078 }
2079 took_snap_rwsem = 1;
2080 }
2081
2082 if (cap == ci->i_auth_cap && ci->i_dirty_caps) {
2083 flushing = __mark_caps_flushing(inode, session, false,
2084 &flush_tid,
2085 &oldest_flush_tid);
2086 } else {
2087 flushing = 0;
2088 flush_tid = 0;
2089 spin_lock(&mdsc->cap_dirty_lock);
2090 oldest_flush_tid = __get_oldest_flush_tid(mdsc);
2091 spin_unlock(&mdsc->cap_dirty_lock);
2092 }
2093
2094 mds = cap->mds;
2095 sent++;
2096
2097
2098 delayed += __send_cap(mdsc, cap, CEPH_CAP_OP_UPDATE, 0,
2099 cap_used, want, retain, flushing,
2100 flush_tid, oldest_flush_tid);
2101 goto retry;
2102 }
2103
2104
2105 if (delayed)
2106 __cap_delay_requeue(mdsc, ci, false);
2107
2108 spin_unlock(&ci->i_ceph_lock);
2109
2110 if (queue_invalidate)
2111 ceph_queue_invalidate(inode);
2112
2113 if (session)
2114 mutex_unlock(&session->s_mutex);
2115 if (took_snap_rwsem)
2116 up_read(&mdsc->snap_rwsem);
2117}
2118
2119
2120
2121
2122static int try_flush_caps(struct inode *inode, u64 *ptid)
2123{
2124 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
2125 struct ceph_inode_info *ci = ceph_inode(inode);
2126 struct ceph_mds_session *session = NULL;
2127 int flushing = 0;
2128 u64 flush_tid = 0, oldest_flush_tid = 0;
2129
2130retry:
2131 spin_lock(&ci->i_ceph_lock);
2132retry_locked:
2133 if (ci->i_ceph_flags & CEPH_I_NOFLUSH) {
2134 spin_unlock(&ci->i_ceph_lock);
2135 dout("try_flush_caps skipping %p I_NOFLUSH set\n", inode);
2136 goto out;
2137 }
2138 if (ci->i_dirty_caps && ci->i_auth_cap) {
2139 struct ceph_cap *cap = ci->i_auth_cap;
2140 int delayed;
2141
2142 if (!session || session != cap->session) {
2143 spin_unlock(&ci->i_ceph_lock);
2144 if (session)
2145 mutex_unlock(&session->s_mutex);
2146 session = cap->session;
2147 mutex_lock(&session->s_mutex);
2148 goto retry;
2149 }
2150 if (cap->session->s_state < CEPH_MDS_SESSION_OPEN) {
2151 spin_unlock(&ci->i_ceph_lock);
2152 goto out;
2153 }
2154
2155 if (ci->i_ceph_flags &
2156 (CEPH_I_KICK_FLUSH | CEPH_I_FLUSH_SNAPS)) {
2157 if (ci->i_ceph_flags & CEPH_I_KICK_FLUSH)
2158 __kick_flushing_caps(mdsc, session, ci, 0);
2159 if (ci->i_ceph_flags & CEPH_I_FLUSH_SNAPS)
2160 __ceph_flush_snaps(ci, session);
2161 goto retry_locked;
2162 }
2163
2164 flushing = __mark_caps_flushing(inode, session, true,
2165 &flush_tid, &oldest_flush_tid);
2166
2167
2168 delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH,
2169 CEPH_CLIENT_CAPS_SYNC,
2170 __ceph_caps_used(ci),
2171 __ceph_caps_wanted(ci),
2172 (cap->issued | cap->implemented),
2173 flushing, flush_tid, oldest_flush_tid);
2174
2175 if (delayed) {
2176 spin_lock(&ci->i_ceph_lock);
2177 __cap_delay_requeue(mdsc, ci, true);
2178 spin_unlock(&ci->i_ceph_lock);
2179 }
2180 } else {
2181 if (!list_empty(&ci->i_cap_flush_list)) {
2182 struct ceph_cap_flush *cf =
2183 list_last_entry(&ci->i_cap_flush_list,
2184 struct ceph_cap_flush, i_list);
2185 cf->wake = true;
2186 flush_tid = cf->tid;
2187 }
2188 flushing = ci->i_flushing_caps;
2189 spin_unlock(&ci->i_ceph_lock);
2190 }
2191out:
2192 if (session)
2193 mutex_unlock(&session->s_mutex);
2194
2195 *ptid = flush_tid;
2196 return flushing;
2197}
2198
2199
2200
2201
2202static int caps_are_flushed(struct inode *inode, u64 flush_tid)
2203{
2204 struct ceph_inode_info *ci = ceph_inode(inode);
2205 int ret = 1;
2206
2207 spin_lock(&ci->i_ceph_lock);
2208 if (!list_empty(&ci->i_cap_flush_list)) {
2209 struct ceph_cap_flush * cf =
2210 list_first_entry(&ci->i_cap_flush_list,
2211 struct ceph_cap_flush, i_list);
2212 if (cf->tid <= flush_tid)
2213 ret = 0;
2214 }
2215 spin_unlock(&ci->i_ceph_lock);
2216 return ret;
2217}
2218
2219
2220
2221
2222static int unsafe_request_wait(struct inode *inode)
2223{
2224 struct ceph_inode_info *ci = ceph_inode(inode);
2225 struct ceph_mds_request *req1 = NULL, *req2 = NULL;
2226 int ret, err = 0;
2227
2228 spin_lock(&ci->i_unsafe_lock);
2229 if (S_ISDIR(inode->i_mode) && !list_empty(&ci->i_unsafe_dirops)) {
2230 req1 = list_last_entry(&ci->i_unsafe_dirops,
2231 struct ceph_mds_request,
2232 r_unsafe_dir_item);
2233 ceph_mdsc_get_request(req1);
2234 }
2235 if (!list_empty(&ci->i_unsafe_iops)) {
2236 req2 = list_last_entry(&ci->i_unsafe_iops,
2237 struct ceph_mds_request,
2238 r_unsafe_target_item);
2239 ceph_mdsc_get_request(req2);
2240 }
2241 spin_unlock(&ci->i_unsafe_lock);
2242
2243 dout("unsafe_request_wait %p wait on tid %llu %llu\n",
2244 inode, req1 ? req1->r_tid : 0ULL, req2 ? req2->r_tid : 0ULL);
2245 if (req1) {
2246 ret = !wait_for_completion_timeout(&req1->r_safe_completion,
2247 ceph_timeout_jiffies(req1->r_timeout));
2248 if (ret)
2249 err = -EIO;
2250 ceph_mdsc_put_request(req1);
2251 }
2252 if (req2) {
2253 ret = !wait_for_completion_timeout(&req2->r_safe_completion,
2254 ceph_timeout_jiffies(req2->r_timeout));
2255 if (ret)
2256 err = -EIO;
2257 ceph_mdsc_put_request(req2);
2258 }
2259 return err;
2260}
2261
2262int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
2263{
2264 struct inode *inode = file->f_mapping->host;
2265 struct ceph_inode_info *ci = ceph_inode(inode);
2266 u64 flush_tid;
2267 int ret;
2268 int dirty;
2269
2270 dout("fsync %p%s\n", inode, datasync ? " datasync" : "");
2271
2272 ret = file_write_and_wait_range(file, start, end);
2273 if (ret < 0)
2274 goto out;
2275
2276 if (datasync)
2277 goto out;
2278
2279 dirty = try_flush_caps(inode, &flush_tid);
2280 dout("fsync dirty caps are %s\n", ceph_cap_string(dirty));
2281
2282 ret = unsafe_request_wait(inode);
2283
2284
2285
2286
2287
2288
2289 if (!ret && (dirty & ~CEPH_CAP_ANY_FILE_WR)) {
2290 ret = wait_event_interruptible(ci->i_cap_wq,
2291 caps_are_flushed(inode, flush_tid));
2292 }
2293out:
2294 dout("fsync %p%s result=%d\n", inode, datasync ? " datasync" : "", ret);
2295 return ret;
2296}
2297
2298
2299
2300
2301
2302
2303
2304int ceph_write_inode(struct inode *inode, struct writeback_control *wbc)
2305{
2306 struct ceph_inode_info *ci = ceph_inode(inode);
2307 u64 flush_tid;
2308 int err = 0;
2309 int dirty;
2310 int wait = (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync);
2311
2312 dout("write_inode %p wait=%d\n", inode, wait);
2313 if (wait) {
2314 dirty = try_flush_caps(inode, &flush_tid);
2315 if (dirty)
2316 err = wait_event_interruptible(ci->i_cap_wq,
2317 caps_are_flushed(inode, flush_tid));
2318 } else {
2319 struct ceph_mds_client *mdsc =
2320 ceph_sb_to_client(inode->i_sb)->mdsc;
2321
2322 spin_lock(&ci->i_ceph_lock);
2323 if (__ceph_caps_dirty(ci))
2324 __cap_delay_requeue_front(mdsc, ci);
2325 spin_unlock(&ci->i_ceph_lock);
2326 }
2327 return err;
2328}
2329
2330static void __kick_flushing_caps(struct ceph_mds_client *mdsc,
2331 struct ceph_mds_session *session,
2332 struct ceph_inode_info *ci,
2333 u64 oldest_flush_tid)
2334 __releases(ci->i_ceph_lock)
2335 __acquires(ci->i_ceph_lock)
2336{
2337 struct inode *inode = &ci->vfs_inode;
2338 struct ceph_cap *cap;
2339 struct ceph_cap_flush *cf;
2340 int ret;
2341 u64 first_tid = 0;
2342 u64 last_snap_flush = 0;
2343
2344 ci->i_ceph_flags &= ~CEPH_I_KICK_FLUSH;
2345
2346 list_for_each_entry_reverse(cf, &ci->i_cap_flush_list, i_list) {
2347 if (!cf->caps) {
2348 last_snap_flush = cf->tid;
2349 break;
2350 }
2351 }
2352
2353 list_for_each_entry(cf, &ci->i_cap_flush_list, i_list) {
2354 if (cf->tid < first_tid)
2355 continue;
2356
2357 cap = ci->i_auth_cap;
2358 if (!(cap && cap->session == session)) {
2359 pr_err("%p auth cap %p not mds%d ???\n",
2360 inode, cap, session->s_mds);
2361 break;
2362 }
2363
2364 first_tid = cf->tid + 1;
2365
2366 if (cf->caps) {
2367 dout("kick_flushing_caps %p cap %p tid %llu %s\n",
2368 inode, cap, cf->tid, ceph_cap_string(cf->caps));
2369 ci->i_ceph_flags |= CEPH_I_NODELAY;
2370
2371 ret = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH,
2372 (cf->tid < last_snap_flush ?
2373 CEPH_CLIENT_CAPS_PENDING_CAPSNAP : 0),
2374 __ceph_caps_used(ci),
2375 __ceph_caps_wanted(ci),
2376 (cap->issued | cap->implemented),
2377 cf->caps, cf->tid, oldest_flush_tid);
2378 if (ret) {
2379 pr_err("kick_flushing_caps: error sending "
2380 "cap flush, ino (%llx.%llx) "
2381 "tid %llu flushing %s\n",
2382 ceph_vinop(inode), cf->tid,
2383 ceph_cap_string(cf->caps));
2384 }
2385 } else {
2386 struct ceph_cap_snap *capsnap =
2387 container_of(cf, struct ceph_cap_snap,
2388 cap_flush);
2389 dout("kick_flushing_caps %p capsnap %p tid %llu %s\n",
2390 inode, capsnap, cf->tid,
2391 ceph_cap_string(capsnap->dirty));
2392
2393 refcount_inc(&capsnap->nref);
2394 spin_unlock(&ci->i_ceph_lock);
2395
2396 ret = __send_flush_snap(inode, session, capsnap, cap->mseq,
2397 oldest_flush_tid);
2398 if (ret < 0) {
2399 pr_err("kick_flushing_caps: error sending "
2400 "cap flushsnap, ino (%llx.%llx) "
2401 "tid %llu follows %llu\n",
2402 ceph_vinop(inode), cf->tid,
2403 capsnap->follows);
2404 }
2405
2406 ceph_put_cap_snap(capsnap);
2407 }
2408
2409 spin_lock(&ci->i_ceph_lock);
2410 }
2411}
2412
2413void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
2414 struct ceph_mds_session *session)
2415{
2416 struct ceph_inode_info *ci;
2417 struct ceph_cap *cap;
2418 u64 oldest_flush_tid;
2419
2420 dout("early_kick_flushing_caps mds%d\n", session->s_mds);
2421
2422 spin_lock(&mdsc->cap_dirty_lock);
2423 oldest_flush_tid = __get_oldest_flush_tid(mdsc);
2424 spin_unlock(&mdsc->cap_dirty_lock);
2425
2426 list_for_each_entry(ci, &session->s_cap_flushing, i_flushing_item) {
2427 spin_lock(&ci->i_ceph_lock);
2428 cap = ci->i_auth_cap;
2429 if (!(cap && cap->session == session)) {
2430 pr_err("%p auth cap %p not mds%d ???\n",
2431 &ci->vfs_inode, cap, session->s_mds);
2432 spin_unlock(&ci->i_ceph_lock);
2433 continue;
2434 }
2435
2436
2437
2438
2439
2440
2441
2442
2443 if ((cap->issued & ci->i_flushing_caps) !=
2444 ci->i_flushing_caps) {
2445
2446
2447
2448 cap->seq = 0;
2449 cap->issue_seq = 0;
2450 cap->mseq = 0;
2451 __kick_flushing_caps(mdsc, session, ci,
2452 oldest_flush_tid);
2453 } else {
2454 ci->i_ceph_flags |= CEPH_I_KICK_FLUSH;
2455 }
2456
2457 spin_unlock(&ci->i_ceph_lock);
2458 }
2459}
2460
2461void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
2462 struct ceph_mds_session *session)
2463{
2464 struct ceph_inode_info *ci;
2465 struct ceph_cap *cap;
2466 u64 oldest_flush_tid;
2467
2468 dout("kick_flushing_caps mds%d\n", session->s_mds);
2469
2470 spin_lock(&mdsc->cap_dirty_lock);
2471 oldest_flush_tid = __get_oldest_flush_tid(mdsc);
2472 spin_unlock(&mdsc->cap_dirty_lock);
2473
2474 list_for_each_entry(ci, &session->s_cap_flushing, i_flushing_item) {
2475 spin_lock(&ci->i_ceph_lock);
2476 cap = ci->i_auth_cap;
2477 if (!(cap && cap->session == session)) {
2478 pr_err("%p auth cap %p not mds%d ???\n",
2479 &ci->vfs_inode, cap, session->s_mds);
2480 spin_unlock(&ci->i_ceph_lock);
2481 continue;
2482 }
2483 if (ci->i_ceph_flags & CEPH_I_KICK_FLUSH) {
2484 __kick_flushing_caps(mdsc, session, ci,
2485 oldest_flush_tid);
2486 }
2487 spin_unlock(&ci->i_ceph_lock);
2488 }
2489}
2490
2491static void kick_flushing_inode_caps(struct ceph_mds_client *mdsc,
2492 struct ceph_mds_session *session,
2493 struct inode *inode)
2494 __releases(ci->i_ceph_lock)
2495{
2496 struct ceph_inode_info *ci = ceph_inode(inode);
2497 struct ceph_cap *cap;
2498
2499 cap = ci->i_auth_cap;
2500 dout("kick_flushing_inode_caps %p flushing %s\n", inode,
2501 ceph_cap_string(ci->i_flushing_caps));
2502
2503 if (!list_empty(&ci->i_cap_flush_list)) {
2504 u64 oldest_flush_tid;
2505 spin_lock(&mdsc->cap_dirty_lock);
2506 list_move_tail(&ci->i_flushing_item,
2507 &cap->session->s_cap_flushing);
2508 oldest_flush_tid = __get_oldest_flush_tid(mdsc);
2509 spin_unlock(&mdsc->cap_dirty_lock);
2510
2511 __kick_flushing_caps(mdsc, session, ci, oldest_flush_tid);
2512 spin_unlock(&ci->i_ceph_lock);
2513 } else {
2514 spin_unlock(&ci->i_ceph_lock);
2515 }
2516}
2517
2518
2519
2520
2521
2522
2523
2524
2525static void __take_cap_refs(struct ceph_inode_info *ci, int got,
2526 bool snap_rwsem_locked)
2527{
2528 if (got & CEPH_CAP_PIN)
2529 ci->i_pin_ref++;
2530 if (got & CEPH_CAP_FILE_RD)
2531 ci->i_rd_ref++;
2532 if (got & CEPH_CAP_FILE_CACHE)
2533 ci->i_rdcache_ref++;
2534 if (got & CEPH_CAP_FILE_WR) {
2535 if (ci->i_wr_ref == 0 && !ci->i_head_snapc) {
2536 BUG_ON(!snap_rwsem_locked);
2537 ci->i_head_snapc = ceph_get_snap_context(
2538 ci->i_snap_realm->cached_context);
2539 }
2540 ci->i_wr_ref++;
2541 }
2542 if (got & CEPH_CAP_FILE_BUFFER) {
2543 if (ci->i_wb_ref == 0)
2544 ihold(&ci->vfs_inode);
2545 ci->i_wb_ref++;
2546 dout("__take_cap_refs %p wb %d -> %d (?)\n",
2547 &ci->vfs_inode, ci->i_wb_ref-1, ci->i_wb_ref);
2548 }
2549}
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want,
2564 loff_t endoff, bool nonblock, int *got)
2565{
2566 struct inode *inode = &ci->vfs_inode;
2567 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
2568 int ret = 0;
2569 int have, implemented;
2570 int file_wanted;
2571 bool snap_rwsem_locked = false;
2572
2573 dout("get_cap_refs %p need %s want %s\n", inode,
2574 ceph_cap_string(need), ceph_cap_string(want));
2575
2576again:
2577 spin_lock(&ci->i_ceph_lock);
2578
2579
2580 file_wanted = __ceph_caps_file_wanted(ci);
2581 if ((file_wanted & need) != need) {
2582 dout("try_get_cap_refs need %s file_wanted %s, EBADF\n",
2583 ceph_cap_string(need), ceph_cap_string(file_wanted));
2584 ret = -EBADF;
2585 goto out_unlock;
2586 }
2587
2588
2589 while (ci->i_truncate_pending) {
2590 spin_unlock(&ci->i_ceph_lock);
2591 if (snap_rwsem_locked) {
2592 up_read(&mdsc->snap_rwsem);
2593 snap_rwsem_locked = false;
2594 }
2595 __ceph_do_pending_vmtruncate(inode);
2596 spin_lock(&ci->i_ceph_lock);
2597 }
2598
2599 have = __ceph_caps_issued(ci, &implemented);
2600
2601 if (have & need & CEPH_CAP_FILE_WR) {
2602 if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) {
2603 dout("get_cap_refs %p endoff %llu > maxsize %llu\n",
2604 inode, endoff, ci->i_max_size);
2605 if (endoff > ci->i_requested_max_size)
2606 ret = -EAGAIN;
2607 goto out_unlock;
2608 }
2609
2610
2611
2612
2613 if (__ceph_have_pending_cap_snap(ci)) {
2614 dout("get_cap_refs %p cap_snap_pending\n", inode);
2615 goto out_unlock;
2616 }
2617 }
2618
2619 if ((have & need) == need) {
2620
2621
2622
2623
2624
2625
2626 int not = want & ~(have & need);
2627 int revoking = implemented & ~have;
2628 dout("get_cap_refs %p have %s but not %s (revoking %s)\n",
2629 inode, ceph_cap_string(have), ceph_cap_string(not),
2630 ceph_cap_string(revoking));
2631 if ((revoking & not) == 0) {
2632 if (!snap_rwsem_locked &&
2633 !ci->i_head_snapc &&
2634 (need & CEPH_CAP_FILE_WR)) {
2635 if (!down_read_trylock(&mdsc->snap_rwsem)) {
2636
2637
2638
2639
2640 if (nonblock) {
2641 ret = -EAGAIN;
2642 goto out_unlock;
2643 }
2644
2645 spin_unlock(&ci->i_ceph_lock);
2646 down_read(&mdsc->snap_rwsem);
2647 snap_rwsem_locked = true;
2648 goto again;
2649 }
2650 snap_rwsem_locked = true;
2651 }
2652 *got = need | (have & want);
2653 if ((need & CEPH_CAP_FILE_RD) &&
2654 !(*got & CEPH_CAP_FILE_CACHE))
2655 ceph_disable_fscache_readpage(ci);
2656 __take_cap_refs(ci, *got, true);
2657 ret = 1;
2658 }
2659 } else {
2660 int session_readonly = false;
2661 if ((need & CEPH_CAP_FILE_WR) && ci->i_auth_cap) {
2662 struct ceph_mds_session *s = ci->i_auth_cap->session;
2663 spin_lock(&s->s_cap_lock);
2664 session_readonly = s->s_readonly;
2665 spin_unlock(&s->s_cap_lock);
2666 }
2667 if (session_readonly) {
2668 dout("get_cap_refs %p needed %s but mds%d readonly\n",
2669 inode, ceph_cap_string(need), ci->i_auth_cap->mds);
2670 ret = -EROFS;
2671 goto out_unlock;
2672 }
2673
2674 if (ci->i_ceph_flags & CEPH_I_CAP_DROPPED) {
2675 int mds_wanted;
2676 if (READ_ONCE(mdsc->fsc->mount_state) ==
2677 CEPH_MOUNT_SHUTDOWN) {
2678 dout("get_cap_refs %p forced umount\n", inode);
2679 ret = -EIO;
2680 goto out_unlock;
2681 }
2682 mds_wanted = __ceph_caps_mds_wanted(ci, false);
2683 if (need & ~(mds_wanted & need)) {
2684 dout("get_cap_refs %p caps were dropped"
2685 " (session killed?)\n", inode);
2686 ret = -ESTALE;
2687 goto out_unlock;
2688 }
2689 if (!(file_wanted & ~mds_wanted))
2690 ci->i_ceph_flags &= ~CEPH_I_CAP_DROPPED;
2691 }
2692
2693 dout("get_cap_refs %p have %s needed %s\n", inode,
2694 ceph_cap_string(have), ceph_cap_string(need));
2695 }
2696out_unlock:
2697 spin_unlock(&ci->i_ceph_lock);
2698 if (snap_rwsem_locked)
2699 up_read(&mdsc->snap_rwsem);
2700
2701 dout("get_cap_refs %p ret %d got %s\n", inode,
2702 ret, ceph_cap_string(*got));
2703 return ret;
2704}
2705
2706
2707
2708
2709
2710
2711static void check_max_size(struct inode *inode, loff_t endoff)
2712{
2713 struct ceph_inode_info *ci = ceph_inode(inode);
2714 int check = 0;
2715
2716
2717 spin_lock(&ci->i_ceph_lock);
2718 if (endoff >= ci->i_max_size && endoff > ci->i_wanted_max_size) {
2719 dout("write %p at large endoff %llu, req max_size\n",
2720 inode, endoff);
2721 ci->i_wanted_max_size = endoff;
2722 }
2723
2724 if (ci->i_auth_cap &&
2725 (ci->i_auth_cap->issued & CEPH_CAP_FILE_WR) &&
2726 ci->i_wanted_max_size > ci->i_max_size &&
2727 ci->i_wanted_max_size > ci->i_requested_max_size)
2728 check = 1;
2729 spin_unlock(&ci->i_ceph_lock);
2730 if (check)
2731 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
2732}
2733
2734int ceph_try_get_caps(struct ceph_inode_info *ci, int need, int want,
2735 bool nonblock, int *got)
2736{
2737 int ret;
2738
2739 BUG_ON(need & ~CEPH_CAP_FILE_RD);
2740 BUG_ON(want & ~(CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO|CEPH_CAP_FILE_SHARED));
2741 ret = ceph_pool_perm_check(ci, need);
2742 if (ret < 0)
2743 return ret;
2744
2745 ret = try_get_cap_refs(ci, need, want, 0, nonblock, got);
2746 return ret == -EAGAIN ? 0 : ret;
2747}
2748
2749
2750
2751
2752
2753
2754int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
2755 loff_t endoff, int *got, struct page **pinned_page)
2756{
2757 int _got, ret;
2758
2759 ret = ceph_pool_perm_check(ci, need);
2760 if (ret < 0)
2761 return ret;
2762
2763 while (true) {
2764 if (endoff > 0)
2765 check_max_size(&ci->vfs_inode, endoff);
2766
2767 _got = 0;
2768 ret = try_get_cap_refs(ci, need, want, endoff,
2769 false, &_got);
2770 if (ret == -EAGAIN)
2771 continue;
2772 if (!ret) {
2773 DEFINE_WAIT_FUNC(wait, woken_wake_function);
2774 add_wait_queue(&ci->i_cap_wq, &wait);
2775
2776 while (!(ret = try_get_cap_refs(ci, need, want, endoff,
2777 true, &_got))) {
2778 if (signal_pending(current)) {
2779 ret = -ERESTARTSYS;
2780 break;
2781 }
2782 wait_woken(&wait, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
2783 }
2784
2785 remove_wait_queue(&ci->i_cap_wq, &wait);
2786 if (ret == -EAGAIN)
2787 continue;
2788 }
2789 if (ret < 0) {
2790 if (ret == -ESTALE) {
2791
2792 ret = ceph_renew_caps(&ci->vfs_inode);
2793 if (ret == 0)
2794 continue;
2795 }
2796 return ret;
2797 }
2798
2799 if (ci->i_inline_version != CEPH_INLINE_NONE &&
2800 (_got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) &&
2801 i_size_read(&ci->vfs_inode) > 0) {
2802 struct page *page =
2803 find_get_page(ci->vfs_inode.i_mapping, 0);
2804 if (page) {
2805 if (PageUptodate(page)) {
2806 *pinned_page = page;
2807 break;
2808 }
2809 put_page(page);
2810 }
2811
2812
2813
2814
2815 ceph_put_cap_refs(ci, _got);
2816 _got = 0;
2817
2818
2819
2820
2821
2822 ret = __ceph_do_getattr(&ci->vfs_inode, NULL,
2823 CEPH_STAT_CAP_INLINE_DATA,
2824 true);
2825 if (ret < 0)
2826 return ret;
2827 continue;
2828 }
2829 break;
2830 }
2831
2832 if ((_got & CEPH_CAP_FILE_RD) && (_got & CEPH_CAP_FILE_CACHE))
2833 ceph_fscache_revalidate_cookie(ci);
2834
2835 *got = _got;
2836 return 0;
2837}
2838
2839
2840
2841
2842
2843void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps)
2844{
2845 spin_lock(&ci->i_ceph_lock);
2846 __take_cap_refs(ci, caps, false);
2847 spin_unlock(&ci->i_ceph_lock);
2848}
2849
2850
2851
2852
2853
2854
2855static int ceph_try_drop_cap_snap(struct ceph_inode_info *ci,
2856 struct ceph_cap_snap *capsnap)
2857{
2858 if (!capsnap->need_flush &&
2859 !capsnap->writing && !capsnap->dirty_pages) {
2860 dout("dropping cap_snap %p follows %llu\n",
2861 capsnap, capsnap->follows);
2862 BUG_ON(capsnap->cap_flush.tid > 0);
2863 ceph_put_snap_context(capsnap->context);
2864 if (!list_is_last(&capsnap->ci_item, &ci->i_cap_snaps))
2865 ci->i_ceph_flags |= CEPH_I_FLUSH_SNAPS;
2866
2867 list_del(&capsnap->ci_item);
2868 ceph_put_cap_snap(capsnap);
2869 return 1;
2870 }
2871 return 0;
2872}
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883void ceph_put_cap_refs(struct ceph_inode_info *ci, int had)
2884{
2885 struct inode *inode = &ci->vfs_inode;
2886 int last = 0, put = 0, flushsnaps = 0, wake = 0;
2887
2888 spin_lock(&ci->i_ceph_lock);
2889 if (had & CEPH_CAP_PIN)
2890 --ci->i_pin_ref;
2891 if (had & CEPH_CAP_FILE_RD)
2892 if (--ci->i_rd_ref == 0)
2893 last++;
2894 if (had & CEPH_CAP_FILE_CACHE)
2895 if (--ci->i_rdcache_ref == 0)
2896 last++;
2897 if (had & CEPH_CAP_FILE_BUFFER) {
2898 if (--ci->i_wb_ref == 0) {
2899 last++;
2900 put++;
2901 }
2902 dout("put_cap_refs %p wb %d -> %d (?)\n",
2903 inode, ci->i_wb_ref+1, ci->i_wb_ref);
2904 }
2905 if (had & CEPH_CAP_FILE_WR)
2906 if (--ci->i_wr_ref == 0) {
2907 last++;
2908 if (__ceph_have_pending_cap_snap(ci)) {
2909 struct ceph_cap_snap *capsnap =
2910 list_last_entry(&ci->i_cap_snaps,
2911 struct ceph_cap_snap,
2912 ci_item);
2913 capsnap->writing = 0;
2914 if (ceph_try_drop_cap_snap(ci, capsnap))
2915 put++;
2916 else if (__ceph_finish_cap_snap(ci, capsnap))
2917 flushsnaps = 1;
2918 wake = 1;
2919 }
2920 if (ci->i_wrbuffer_ref_head == 0 &&
2921 ci->i_dirty_caps == 0 &&
2922 ci->i_flushing_caps == 0) {
2923 BUG_ON(!ci->i_head_snapc);
2924 ceph_put_snap_context(ci->i_head_snapc);
2925 ci->i_head_snapc = NULL;
2926 }
2927
2928 if (!__ceph_is_any_caps(ci) && ci->i_snap_realm)
2929 drop_inode_snap_realm(ci);
2930 }
2931 spin_unlock(&ci->i_ceph_lock);
2932
2933 dout("put_cap_refs %p had %s%s%s\n", inode, ceph_cap_string(had),
2934 last ? " last" : "", put ? " put" : "");
2935
2936 if (last && !flushsnaps)
2937 ceph_check_caps(ci, 0, NULL);
2938 else if (flushsnaps)
2939 ceph_flush_snaps(ci, NULL);
2940 if (wake)
2941 wake_up_all(&ci->i_cap_wq);
2942 while (put-- > 0)
2943 iput(inode);
2944}
2945
2946
2947
2948
2949
2950
2951
2952
2953void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
2954 struct ceph_snap_context *snapc)
2955{
2956 struct inode *inode = &ci->vfs_inode;
2957 struct ceph_cap_snap *capsnap = NULL;
2958 int put = 0;
2959 bool last = false;
2960 bool found = false;
2961 bool flush_snaps = false;
2962 bool complete_capsnap = false;
2963
2964 spin_lock(&ci->i_ceph_lock);
2965 ci->i_wrbuffer_ref -= nr;
2966 if (ci->i_wrbuffer_ref == 0) {
2967 last = true;
2968 put++;
2969 }
2970
2971 if (ci->i_head_snapc == snapc) {
2972 ci->i_wrbuffer_ref_head -= nr;
2973 if (ci->i_wrbuffer_ref_head == 0 &&
2974 ci->i_wr_ref == 0 &&
2975 ci->i_dirty_caps == 0 &&
2976 ci->i_flushing_caps == 0) {
2977 BUG_ON(!ci->i_head_snapc);
2978 ceph_put_snap_context(ci->i_head_snapc);
2979 ci->i_head_snapc = NULL;
2980 }
2981 dout("put_wrbuffer_cap_refs on %p head %d/%d -> %d/%d %s\n",
2982 inode,
2983 ci->i_wrbuffer_ref+nr, ci->i_wrbuffer_ref_head+nr,
2984 ci->i_wrbuffer_ref, ci->i_wrbuffer_ref_head,
2985 last ? " LAST" : "");
2986 } else {
2987 list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
2988 if (capsnap->context == snapc) {
2989 found = true;
2990 break;
2991 }
2992 }
2993 BUG_ON(!found);
2994 capsnap->dirty_pages -= nr;
2995 if (capsnap->dirty_pages == 0) {
2996 complete_capsnap = true;
2997 if (!capsnap->writing) {
2998 if (ceph_try_drop_cap_snap(ci, capsnap)) {
2999 put++;
3000 } else {
3001 ci->i_ceph_flags |= CEPH_I_FLUSH_SNAPS;
3002 flush_snaps = true;
3003 }
3004 }
3005 }
3006 dout("put_wrbuffer_cap_refs on %p cap_snap %p "
3007 " snap %lld %d/%d -> %d/%d %s%s\n",
3008 inode, capsnap, capsnap->context->seq,
3009 ci->i_wrbuffer_ref+nr, capsnap->dirty_pages + nr,
3010 ci->i_wrbuffer_ref, capsnap->dirty_pages,
3011 last ? " (wrbuffer last)" : "",
3012 complete_capsnap ? " (complete capsnap)" : "");
3013 }
3014
3015 spin_unlock(&ci->i_ceph_lock);
3016
3017 if (last) {
3018 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
3019 } else if (flush_snaps) {
3020 ceph_flush_snaps(ci, NULL);
3021 }
3022 if (complete_capsnap)
3023 wake_up_all(&ci->i_cap_wq);
3024 while (put-- > 0) {
3025
3026 ceph_async_iput(inode);
3027 }
3028}
3029
3030
3031
3032
3033static void invalidate_aliases(struct inode *inode)
3034{
3035 struct dentry *dn, *prev = NULL;
3036
3037 dout("invalidate_aliases inode %p\n", inode);
3038 d_prune_aliases(inode);
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048 while ((dn = d_find_alias(inode))) {
3049 if (dn == prev) {
3050 dput(dn);
3051 break;
3052 }
3053 d_invalidate(dn);
3054 if (prev)
3055 dput(prev);
3056 prev = dn;
3057 }
3058 if (prev)
3059 dput(prev);
3060}
3061
3062struct cap_extra_info {
3063 struct ceph_string *pool_ns;
3064
3065 u64 inline_version;
3066 void *inline_data;
3067 u32 inline_len;
3068
3069 bool dirstat_valid;
3070 u64 nfiles;
3071 u64 nsubdirs;
3072 u64 change_attr;
3073
3074 int issued;
3075 struct timespec64 btime;
3076};
3077
3078
3079
3080
3081
3082
3083
3084static void handle_cap_grant(struct inode *inode,
3085 struct ceph_mds_session *session,
3086 struct ceph_cap *cap,
3087 struct ceph_mds_caps *grant,
3088 struct ceph_buffer *xattr_buf,
3089 struct cap_extra_info *extra_info)
3090 __releases(ci->i_ceph_lock)
3091 __releases(session->s_mdsc->snap_rwsem)
3092{
3093 struct ceph_inode_info *ci = ceph_inode(inode);
3094 int seq = le32_to_cpu(grant->seq);
3095 int newcaps = le32_to_cpu(grant->caps);
3096 int used, wanted, dirty;
3097 u64 size = le64_to_cpu(grant->size);
3098 u64 max_size = le64_to_cpu(grant->max_size);
3099 unsigned char check_caps = 0;
3100 bool was_stale = cap->cap_gen < session->s_cap_gen;
3101 bool wake = false;
3102 bool writeback = false;
3103 bool queue_trunc = false;
3104 bool queue_invalidate = false;
3105 bool deleted_inode = false;
3106 bool fill_inline = false;
3107
3108 dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n",
3109 inode, cap, session->s_mds, seq, ceph_cap_string(newcaps));
3110 dout(" size %llu max_size %llu, i_size %llu\n", size, max_size,
3111 inode->i_size);
3112
3113
3114
3115
3116
3117
3118
3119 if (!S_ISDIR(inode->i_mode) &&
3120 ((cap->issued & ~newcaps) & CEPH_CAP_FILE_CACHE) &&
3121 (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 &&
3122 !(ci->i_wrbuffer_ref || ci->i_wb_ref)) {
3123 if (try_nonblocking_invalidate(inode)) {
3124
3125
3126 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
3127 queue_invalidate = true;
3128 ci->i_rdcache_revoking = ci->i_rdcache_gen;
3129 }
3130 }
3131 }
3132
3133 if (was_stale)
3134 cap->issued = cap->implemented = CEPH_CAP_PIN;
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144 if (ceph_seq_cmp(seq, cap->seq) <= 0) {
3145 WARN_ON(cap != ci->i_auth_cap);
3146 WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id));
3147 seq = cap->seq;
3148 newcaps |= cap->issued;
3149 }
3150
3151
3152 cap->cap_gen = session->s_cap_gen;
3153 cap->seq = seq;
3154
3155 __check_cap_issue(ci, cap, newcaps);
3156
3157 inode_set_max_iversion_raw(inode, extra_info->change_attr);
3158
3159 if ((newcaps & CEPH_CAP_AUTH_SHARED) &&
3160 (extra_info->issued & CEPH_CAP_AUTH_EXCL) == 0) {
3161 inode->i_mode = le32_to_cpu(grant->mode);
3162 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(grant->uid));
3163 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(grant->gid));
3164 ci->i_btime = extra_info->btime;
3165 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
3166 from_kuid(&init_user_ns, inode->i_uid),
3167 from_kgid(&init_user_ns, inode->i_gid));
3168 }
3169
3170 if ((newcaps & CEPH_CAP_LINK_SHARED) &&
3171 (extra_info->issued & CEPH_CAP_LINK_EXCL) == 0) {
3172 set_nlink(inode, le32_to_cpu(grant->nlink));
3173 if (inode->i_nlink == 0 &&
3174 (newcaps & (CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL)))
3175 deleted_inode = true;
3176 }
3177
3178 if ((extra_info->issued & CEPH_CAP_XATTR_EXCL) == 0 &&
3179 grant->xattr_len) {
3180 int len = le32_to_cpu(grant->xattr_len);
3181 u64 version = le64_to_cpu(grant->xattr_version);
3182
3183 if (version > ci->i_xattrs.version) {
3184 dout(" got new xattrs v%llu on %p len %d\n",
3185 version, inode, len);
3186 if (ci->i_xattrs.blob)
3187 ceph_buffer_put(ci->i_xattrs.blob);
3188 ci->i_xattrs.blob = ceph_buffer_get(xattr_buf);
3189 ci->i_xattrs.version = version;
3190 ceph_forget_all_cached_acls(inode);
3191 ceph_security_invalidate_secctx(inode);
3192 }
3193 }
3194
3195 if (newcaps & CEPH_CAP_ANY_RD) {
3196 struct timespec64 mtime, atime, ctime;
3197
3198 ceph_decode_timespec64(&mtime, &grant->mtime);
3199 ceph_decode_timespec64(&atime, &grant->atime);
3200 ceph_decode_timespec64(&ctime, &grant->ctime);
3201 ceph_fill_file_time(inode, extra_info->issued,
3202 le32_to_cpu(grant->time_warp_seq),
3203 &ctime, &mtime, &atime);
3204 }
3205
3206 if ((newcaps & CEPH_CAP_FILE_SHARED) && extra_info->dirstat_valid) {
3207 ci->i_files = extra_info->nfiles;
3208 ci->i_subdirs = extra_info->nsubdirs;
3209 }
3210
3211 if (newcaps & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)) {
3212
3213 s64 old_pool = ci->i_layout.pool_id;
3214 struct ceph_string *old_ns;
3215
3216 ceph_file_layout_from_legacy(&ci->i_layout, &grant->layout);
3217 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
3218 lockdep_is_held(&ci->i_ceph_lock));
3219 rcu_assign_pointer(ci->i_layout.pool_ns, extra_info->pool_ns);
3220
3221 if (ci->i_layout.pool_id != old_pool ||
3222 extra_info->pool_ns != old_ns)
3223 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
3224
3225 extra_info->pool_ns = old_ns;
3226
3227
3228 queue_trunc = ceph_fill_file_size(inode, extra_info->issued,
3229 le32_to_cpu(grant->truncate_seq),
3230 le64_to_cpu(grant->truncate_size),
3231 size);
3232 }
3233
3234 if (ci->i_auth_cap == cap && (newcaps & CEPH_CAP_ANY_FILE_WR)) {
3235 if (max_size != ci->i_max_size) {
3236 dout("max_size %lld -> %llu\n",
3237 ci->i_max_size, max_size);
3238 ci->i_max_size = max_size;
3239 if (max_size >= ci->i_wanted_max_size) {
3240 ci->i_wanted_max_size = 0;
3241 ci->i_requested_max_size = 0;
3242 }
3243 wake = true;
3244 } else if (ci->i_wanted_max_size > ci->i_max_size &&
3245 ci->i_wanted_max_size > ci->i_requested_max_size) {
3246
3247 wake = true;
3248 }
3249 }
3250
3251
3252 wanted = __ceph_caps_wanted(ci);
3253 used = __ceph_caps_used(ci);
3254 dirty = __ceph_caps_dirty(ci);
3255 dout(" my wanted = %s, used = %s, dirty %s\n",
3256 ceph_cap_string(wanted),
3257 ceph_cap_string(used),
3258 ceph_cap_string(dirty));
3259
3260 if ((was_stale || le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) &&
3261 (wanted & ~(cap->mds_wanted | newcaps))) {
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272 check_caps = 1;
3273 }
3274
3275
3276 if (cap->issued & ~newcaps) {
3277 int revoking = cap->issued & ~newcaps;
3278
3279 dout("revocation: %s -> %s (revoking %s)\n",
3280 ceph_cap_string(cap->issued),
3281 ceph_cap_string(newcaps),
3282 ceph_cap_string(revoking));
3283 if (revoking & used & CEPH_CAP_FILE_BUFFER)
3284 writeback = true;
3285 else if (revoking == CEPH_CAP_FILE_CACHE &&
3286 (newcaps & CEPH_CAP_FILE_LAZYIO) == 0 &&
3287 queue_invalidate)
3288 ;
3289 else if (cap == ci->i_auth_cap)
3290 check_caps = 1;
3291 else
3292 check_caps = 2;
3293 cap->issued = newcaps;
3294 cap->implemented |= newcaps;
3295 } else if (cap->issued == newcaps) {
3296 dout("caps unchanged: %s -> %s\n",
3297 ceph_cap_string(cap->issued), ceph_cap_string(newcaps));
3298 } else {
3299 dout("grant: %s -> %s\n", ceph_cap_string(cap->issued),
3300 ceph_cap_string(newcaps));
3301
3302 if (cap == ci->i_auth_cap &&
3303 __ceph_caps_revoking_other(ci, cap, newcaps))
3304 check_caps = 2;
3305
3306 cap->issued = newcaps;
3307 cap->implemented |= newcaps;
3308
3309
3310 wake = true;
3311 }
3312 BUG_ON(cap->issued & ~cap->implemented);
3313
3314 if (extra_info->inline_version > 0 &&
3315 extra_info->inline_version >= ci->i_inline_version) {
3316 ci->i_inline_version = extra_info->inline_version;
3317 if (ci->i_inline_version != CEPH_INLINE_NONE &&
3318 (newcaps & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)))
3319 fill_inline = true;
3320 }
3321
3322 if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) {
3323 if (newcaps & ~extra_info->issued)
3324 wake = true;
3325 kick_flushing_inode_caps(session->s_mdsc, session, inode);
3326 up_read(&session->s_mdsc->snap_rwsem);
3327 } else {
3328 spin_unlock(&ci->i_ceph_lock);
3329 }
3330
3331 if (fill_inline)
3332 ceph_fill_inline_data(inode, NULL, extra_info->inline_data,
3333 extra_info->inline_len);
3334
3335 if (queue_trunc)
3336 ceph_queue_vmtruncate(inode);
3337
3338 if (writeback)
3339
3340
3341
3342
3343
3344 ceph_queue_writeback(inode);
3345 if (queue_invalidate)
3346 ceph_queue_invalidate(inode);
3347 if (deleted_inode)
3348 invalidate_aliases(inode);
3349 if (wake)
3350 wake_up_all(&ci->i_cap_wq);
3351
3352 if (check_caps == 1)
3353 ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_AUTHONLY,
3354 session);
3355 else if (check_caps == 2)
3356 ceph_check_caps(ci, CHECK_CAPS_NODELAY, session);
3357 else
3358 mutex_unlock(&session->s_mutex);
3359}
3360
3361
3362
3363
3364
3365static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid,
3366 struct ceph_mds_caps *m,
3367 struct ceph_mds_session *session,
3368 struct ceph_cap *cap)
3369 __releases(ci->i_ceph_lock)
3370{
3371 struct ceph_inode_info *ci = ceph_inode(inode);
3372 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
3373 struct ceph_cap_flush *cf, *tmp_cf;
3374 LIST_HEAD(to_remove);
3375 unsigned seq = le32_to_cpu(m->seq);
3376 int dirty = le32_to_cpu(m->dirty);
3377 int cleaned = 0;
3378 bool drop = false;
3379 bool wake_ci = false;
3380 bool wake_mdsc = false;
3381
3382 list_for_each_entry_safe(cf, tmp_cf, &ci->i_cap_flush_list, i_list) {
3383 if (cf->tid == flush_tid)
3384 cleaned = cf->caps;
3385 if (cf->caps == 0)
3386 continue;
3387 if (cf->tid <= flush_tid) {
3388 if (__finish_cap_flush(NULL, ci, cf))
3389 wake_ci = true;
3390 list_add_tail(&cf->i_list, &to_remove);
3391 } else {
3392 cleaned &= ~cf->caps;
3393 if (!cleaned)
3394 break;
3395 }
3396 }
3397
3398 dout("handle_cap_flush_ack inode %p mds%d seq %d on %s cleaned %s,"
3399 " flushing %s -> %s\n",
3400 inode, session->s_mds, seq, ceph_cap_string(dirty),
3401 ceph_cap_string(cleaned), ceph_cap_string(ci->i_flushing_caps),
3402 ceph_cap_string(ci->i_flushing_caps & ~cleaned));
3403
3404 if (list_empty(&to_remove) && !cleaned)
3405 goto out;
3406
3407 ci->i_flushing_caps &= ~cleaned;
3408
3409 spin_lock(&mdsc->cap_dirty_lock);
3410
3411 list_for_each_entry(cf, &to_remove, i_list) {
3412 if (__finish_cap_flush(mdsc, NULL, cf))
3413 wake_mdsc = true;
3414 }
3415
3416 if (ci->i_flushing_caps == 0) {
3417 if (list_empty(&ci->i_cap_flush_list)) {
3418 list_del_init(&ci->i_flushing_item);
3419 if (!list_empty(&session->s_cap_flushing)) {
3420 dout(" mds%d still flushing cap on %p\n",
3421 session->s_mds,
3422 &list_first_entry(&session->s_cap_flushing,
3423 struct ceph_inode_info,
3424 i_flushing_item)->vfs_inode);
3425 }
3426 }
3427 mdsc->num_cap_flushing--;
3428 dout(" inode %p now !flushing\n", inode);
3429
3430 if (ci->i_dirty_caps == 0) {
3431 dout(" inode %p now clean\n", inode);
3432 BUG_ON(!list_empty(&ci->i_dirty_item));
3433 drop = true;
3434 if (ci->i_wr_ref == 0 &&
3435 ci->i_wrbuffer_ref_head == 0) {
3436 BUG_ON(!ci->i_head_snapc);
3437 ceph_put_snap_context(ci->i_head_snapc);
3438 ci->i_head_snapc = NULL;
3439 }
3440 } else {
3441 BUG_ON(list_empty(&ci->i_dirty_item));
3442 }
3443 }
3444 spin_unlock(&mdsc->cap_dirty_lock);
3445
3446out:
3447 spin_unlock(&ci->i_ceph_lock);
3448
3449 while (!list_empty(&to_remove)) {
3450 cf = list_first_entry(&to_remove,
3451 struct ceph_cap_flush, i_list);
3452 list_del(&cf->i_list);
3453 ceph_free_cap_flush(cf);
3454 }
3455
3456 if (wake_ci)
3457 wake_up_all(&ci->i_cap_wq);
3458 if (wake_mdsc)
3459 wake_up_all(&mdsc->cap_flushing_wq);
3460 if (drop)
3461 iput(inode);
3462}
3463
3464
3465
3466
3467
3468
3469
3470static void handle_cap_flushsnap_ack(struct inode *inode, u64 flush_tid,
3471 struct ceph_mds_caps *m,
3472 struct ceph_mds_session *session)
3473{
3474 struct ceph_inode_info *ci = ceph_inode(inode);
3475 struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
3476 u64 follows = le64_to_cpu(m->snap_follows);
3477 struct ceph_cap_snap *capsnap;
3478 bool flushed = false;
3479 bool wake_ci = false;
3480 bool wake_mdsc = false;
3481
3482 dout("handle_cap_flushsnap_ack inode %p ci %p mds%d follows %lld\n",
3483 inode, ci, session->s_mds, follows);
3484
3485 spin_lock(&ci->i_ceph_lock);
3486 list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
3487 if (capsnap->follows == follows) {
3488 if (capsnap->cap_flush.tid != flush_tid) {
3489 dout(" cap_snap %p follows %lld tid %lld !="
3490 " %lld\n", capsnap, follows,
3491 flush_tid, capsnap->cap_flush.tid);
3492 break;
3493 }
3494 flushed = true;
3495 break;
3496 } else {
3497 dout(" skipping cap_snap %p follows %lld\n",
3498 capsnap, capsnap->follows);
3499 }
3500 }
3501 if (flushed) {
3502 WARN_ON(capsnap->dirty_pages || capsnap->writing);
3503 dout(" removing %p cap_snap %p follows %lld\n",
3504 inode, capsnap, follows);
3505 list_del(&capsnap->ci_item);
3506 if (__finish_cap_flush(NULL, ci, &capsnap->cap_flush))
3507 wake_ci = true;
3508
3509 spin_lock(&mdsc->cap_dirty_lock);
3510
3511 if (list_empty(&ci->i_cap_flush_list))
3512 list_del_init(&ci->i_flushing_item);
3513
3514 if (__finish_cap_flush(mdsc, NULL, &capsnap->cap_flush))
3515 wake_mdsc = true;
3516
3517 spin_unlock(&mdsc->cap_dirty_lock);
3518 }
3519 spin_unlock(&ci->i_ceph_lock);
3520 if (flushed) {
3521 ceph_put_snap_context(capsnap->context);
3522 ceph_put_cap_snap(capsnap);
3523 if (wake_ci)
3524 wake_up_all(&ci->i_cap_wq);
3525 if (wake_mdsc)
3526 wake_up_all(&mdsc->cap_flushing_wq);
3527 iput(inode);
3528 }
3529}
3530
3531
3532
3533
3534
3535
3536static void handle_cap_trunc(struct inode *inode,
3537 struct ceph_mds_caps *trunc,
3538 struct ceph_mds_session *session)
3539 __releases(ci->i_ceph_lock)
3540{
3541 struct ceph_inode_info *ci = ceph_inode(inode);
3542 int mds = session->s_mds;
3543 int seq = le32_to_cpu(trunc->seq);
3544 u32 truncate_seq = le32_to_cpu(trunc->truncate_seq);
3545 u64 truncate_size = le64_to_cpu(trunc->truncate_size);
3546 u64 size = le64_to_cpu(trunc->size);
3547 int implemented = 0;
3548 int dirty = __ceph_caps_dirty(ci);
3549 int issued = __ceph_caps_issued(ceph_inode(inode), &implemented);
3550 int queue_trunc = 0;
3551
3552 issued |= implemented | dirty;
3553
3554 dout("handle_cap_trunc inode %p mds%d seq %d to %lld seq %d\n",
3555 inode, mds, seq, truncate_size, truncate_seq);
3556 queue_trunc = ceph_fill_file_size(inode, issued,
3557 truncate_seq, truncate_size, size);
3558 spin_unlock(&ci->i_ceph_lock);
3559
3560 if (queue_trunc)
3561 ceph_queue_vmtruncate(inode);
3562}
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex,
3573 struct ceph_mds_cap_peer *ph,
3574 struct ceph_mds_session *session)
3575{
3576 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
3577 struct ceph_mds_session *tsession = NULL;
3578 struct ceph_cap *cap, *tcap, *new_cap = NULL;
3579 struct ceph_inode_info *ci = ceph_inode(inode);
3580 u64 t_cap_id;
3581 unsigned mseq = le32_to_cpu(ex->migrate_seq);
3582 unsigned t_seq, t_mseq;
3583 int target, issued;
3584 int mds = session->s_mds;
3585
3586 if (ph) {
3587 t_cap_id = le64_to_cpu(ph->cap_id);
3588 t_seq = le32_to_cpu(ph->seq);
3589 t_mseq = le32_to_cpu(ph->mseq);
3590 target = le32_to_cpu(ph->mds);
3591 } else {
3592 t_cap_id = t_seq = t_mseq = 0;
3593 target = -1;
3594 }
3595
3596 dout("handle_cap_export inode %p ci %p mds%d mseq %d target %d\n",
3597 inode, ci, mds, mseq, target);
3598retry:
3599 spin_lock(&ci->i_ceph_lock);
3600 cap = __get_cap_for_mds(ci, mds);
3601 if (!cap || cap->cap_id != le64_to_cpu(ex->cap_id))
3602 goto out_unlock;
3603
3604 if (target < 0) {
3605 if (cap->mds_wanted | cap->issued)
3606 ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
3607 __ceph_remove_cap(cap, false);
3608 goto out_unlock;
3609 }
3610
3611
3612
3613
3614
3615
3616 issued = cap->issued;
3617 if (issued != cap->implemented)
3618 pr_err_ratelimited("handle_cap_export: issued != implemented: "
3619 "ino (%llx.%llx) mds%d seq %d mseq %d "
3620 "issued %s implemented %s\n",
3621 ceph_vinop(inode), mds, cap->seq, cap->mseq,
3622 ceph_cap_string(issued),
3623 ceph_cap_string(cap->implemented));
3624
3625
3626 tcap = __get_cap_for_mds(ci, target);
3627 if (tcap) {
3628
3629 if (tcap->cap_id == t_cap_id &&
3630 ceph_seq_cmp(tcap->seq, t_seq) < 0) {
3631 dout(" updating import cap %p mds%d\n", tcap, target);
3632 tcap->cap_id = t_cap_id;
3633 tcap->seq = t_seq - 1;
3634 tcap->issue_seq = t_seq - 1;
3635 tcap->issued |= issued;
3636 tcap->implemented |= issued;
3637 if (cap == ci->i_auth_cap)
3638 ci->i_auth_cap = tcap;
3639
3640 if (!list_empty(&ci->i_cap_flush_list) &&
3641 ci->i_auth_cap == tcap) {
3642 spin_lock(&mdsc->cap_dirty_lock);
3643 list_move_tail(&ci->i_flushing_item,
3644 &tcap->session->s_cap_flushing);
3645 spin_unlock(&mdsc->cap_dirty_lock);
3646 }
3647 }
3648 __ceph_remove_cap(cap, false);
3649 goto out_unlock;
3650 } else if (tsession) {
3651
3652 int flag = (cap == ci->i_auth_cap) ? CEPH_CAP_FLAG_AUTH : 0;
3653 tcap = new_cap;
3654 ceph_add_cap(inode, tsession, t_cap_id, -1, issued, 0,
3655 t_seq - 1, t_mseq, (u64)-1, flag, &new_cap);
3656
3657 if (!list_empty(&ci->i_cap_flush_list) &&
3658 ci->i_auth_cap == tcap) {
3659 spin_lock(&mdsc->cap_dirty_lock);
3660 list_move_tail(&ci->i_flushing_item,
3661 &tcap->session->s_cap_flushing);
3662 spin_unlock(&mdsc->cap_dirty_lock);
3663 }
3664
3665 __ceph_remove_cap(cap, false);
3666 goto out_unlock;
3667 }
3668
3669 spin_unlock(&ci->i_ceph_lock);
3670 mutex_unlock(&session->s_mutex);
3671
3672
3673 tsession = ceph_mdsc_open_export_target_session(mdsc, target);
3674 if (!IS_ERR(tsession)) {
3675 if (mds > target) {
3676 mutex_lock(&session->s_mutex);
3677 mutex_lock_nested(&tsession->s_mutex,
3678 SINGLE_DEPTH_NESTING);
3679 } else {
3680 mutex_lock(&tsession->s_mutex);
3681 mutex_lock_nested(&session->s_mutex,
3682 SINGLE_DEPTH_NESTING);
3683 }
3684 new_cap = ceph_get_cap(mdsc, NULL);
3685 } else {
3686 WARN_ON(1);
3687 tsession = NULL;
3688 target = -1;
3689 }
3690 goto retry;
3691
3692out_unlock:
3693 spin_unlock(&ci->i_ceph_lock);
3694 mutex_unlock(&session->s_mutex);
3695 if (tsession) {
3696 mutex_unlock(&tsession->s_mutex);
3697 ceph_put_mds_session(tsession);
3698 }
3699 if (new_cap)
3700 ceph_put_cap(mdsc, new_cap);
3701}
3702
3703
3704
3705
3706
3707
3708static void handle_cap_import(struct ceph_mds_client *mdsc,
3709 struct inode *inode, struct ceph_mds_caps *im,
3710 struct ceph_mds_cap_peer *ph,
3711 struct ceph_mds_session *session,
3712 struct ceph_cap **target_cap, int *old_issued)
3713 __acquires(ci->i_ceph_lock)
3714{
3715 struct ceph_inode_info *ci = ceph_inode(inode);
3716 struct ceph_cap *cap, *ocap, *new_cap = NULL;
3717 int mds = session->s_mds;
3718 int issued;
3719 unsigned caps = le32_to_cpu(im->caps);
3720 unsigned wanted = le32_to_cpu(im->wanted);
3721 unsigned seq = le32_to_cpu(im->seq);
3722 unsigned mseq = le32_to_cpu(im->migrate_seq);
3723 u64 realmino = le64_to_cpu(im->realm);
3724 u64 cap_id = le64_to_cpu(im->cap_id);
3725 u64 p_cap_id;
3726 int peer;
3727
3728 if (ph) {
3729 p_cap_id = le64_to_cpu(ph->cap_id);
3730 peer = le32_to_cpu(ph->mds);
3731 } else {
3732 p_cap_id = 0;
3733 peer = -1;
3734 }
3735
3736 dout("handle_cap_import inode %p ci %p mds%d mseq %d peer %d\n",
3737 inode, ci, mds, mseq, peer);
3738
3739retry:
3740 spin_lock(&ci->i_ceph_lock);
3741 cap = __get_cap_for_mds(ci, mds);
3742 if (!cap) {
3743 if (!new_cap) {
3744 spin_unlock(&ci->i_ceph_lock);
3745 new_cap = ceph_get_cap(mdsc, NULL);
3746 goto retry;
3747 }
3748 cap = new_cap;
3749 } else {
3750 if (new_cap) {
3751 ceph_put_cap(mdsc, new_cap);
3752 new_cap = NULL;
3753 }
3754 }
3755
3756 __ceph_caps_issued(ci, &issued);
3757 issued |= __ceph_caps_dirty(ci);
3758
3759 ceph_add_cap(inode, session, cap_id, -1, caps, wanted, seq, mseq,
3760 realmino, CEPH_CAP_FLAG_AUTH, &new_cap);
3761
3762 ocap = peer >= 0 ? __get_cap_for_mds(ci, peer) : NULL;
3763 if (ocap && ocap->cap_id == p_cap_id) {
3764 dout(" remove export cap %p mds%d flags %d\n",
3765 ocap, peer, ph->flags);
3766 if ((ph->flags & CEPH_CAP_FLAG_AUTH) &&
3767 (ocap->seq != le32_to_cpu(ph->seq) ||
3768 ocap->mseq != le32_to_cpu(ph->mseq))) {
3769 pr_err_ratelimited("handle_cap_import: "
3770 "mismatched seq/mseq: ino (%llx.%llx) "
3771 "mds%d seq %d mseq %d importer mds%d "
3772 "has peer seq %d mseq %d\n",
3773 ceph_vinop(inode), peer, ocap->seq,
3774 ocap->mseq, mds, le32_to_cpu(ph->seq),
3775 le32_to_cpu(ph->mseq));
3776 }
3777 __ceph_remove_cap(ocap, (ph->flags & CEPH_CAP_FLAG_RELEASE));
3778 }
3779
3780
3781 ci->i_requested_max_size = 0;
3782
3783 *old_issued = issued;
3784 *target_cap = cap;
3785}
3786
3787
3788
3789
3790
3791
3792
3793void ceph_handle_caps(struct ceph_mds_session *session,
3794 struct ceph_msg *msg)
3795{
3796 struct ceph_mds_client *mdsc = session->s_mdsc;
3797 struct inode *inode;
3798 struct ceph_inode_info *ci;
3799 struct ceph_cap *cap;
3800 struct ceph_mds_caps *h;
3801 struct ceph_mds_cap_peer *peer = NULL;
3802 struct ceph_snap_realm *realm = NULL;
3803 int op;
3804 int msg_version = le16_to_cpu(msg->hdr.version);
3805 u32 seq, mseq;
3806 struct ceph_vino vino;
3807 void *snaptrace;
3808 size_t snaptrace_len;
3809 void *p, *end;
3810 struct cap_extra_info extra_info = {};
3811
3812 dout("handle_caps from mds%d\n", session->s_mds);
3813
3814
3815 end = msg->front.iov_base + msg->front.iov_len;
3816 if (msg->front.iov_len < sizeof(*h))
3817 goto bad;
3818 h = msg->front.iov_base;
3819 op = le32_to_cpu(h->op);
3820 vino.ino = le64_to_cpu(h->ino);
3821 vino.snap = CEPH_NOSNAP;
3822 seq = le32_to_cpu(h->seq);
3823 mseq = le32_to_cpu(h->migrate_seq);
3824
3825 snaptrace = h + 1;
3826 snaptrace_len = le32_to_cpu(h->snap_trace_len);
3827 p = snaptrace + snaptrace_len;
3828
3829 if (msg_version >= 2) {
3830 u32 flock_len;
3831 ceph_decode_32_safe(&p, end, flock_len, bad);
3832 if (p + flock_len > end)
3833 goto bad;
3834 p += flock_len;
3835 }
3836
3837 if (msg_version >= 3) {
3838 if (op == CEPH_CAP_OP_IMPORT) {
3839 if (p + sizeof(*peer) > end)
3840 goto bad;
3841 peer = p;
3842 p += sizeof(*peer);
3843 } else if (op == CEPH_CAP_OP_EXPORT) {
3844
3845 peer = (void *)&h->size;
3846 }
3847 }
3848
3849 if (msg_version >= 4) {
3850 ceph_decode_64_safe(&p, end, extra_info.inline_version, bad);
3851 ceph_decode_32_safe(&p, end, extra_info.inline_len, bad);
3852 if (p + extra_info.inline_len > end)
3853 goto bad;
3854 extra_info.inline_data = p;
3855 p += extra_info.inline_len;
3856 }
3857
3858 if (msg_version >= 5) {
3859 struct ceph_osd_client *osdc = &mdsc->fsc->client->osdc;
3860 u32 epoch_barrier;
3861
3862 ceph_decode_32_safe(&p, end, epoch_barrier, bad);
3863 ceph_osdc_update_epoch_barrier(osdc, epoch_barrier);
3864 }
3865
3866 if (msg_version >= 8) {
3867 u64 flush_tid;
3868 u32 caller_uid, caller_gid;
3869 u32 pool_ns_len;
3870
3871
3872 ceph_decode_64_safe(&p, end, flush_tid, bad);
3873
3874 ceph_decode_32_safe(&p, end, caller_uid, bad);
3875 ceph_decode_32_safe(&p, end, caller_gid, bad);
3876
3877 ceph_decode_32_safe(&p, end, pool_ns_len, bad);
3878 if (pool_ns_len > 0) {
3879 ceph_decode_need(&p, end, pool_ns_len, bad);
3880 extra_info.pool_ns =
3881 ceph_find_or_create_string(p, pool_ns_len);
3882 p += pool_ns_len;
3883 }
3884 }
3885
3886 if (msg_version >= 9) {
3887 struct ceph_timespec *btime;
3888
3889 if (p + sizeof(*btime) > end)
3890 goto bad;
3891 btime = p;
3892 ceph_decode_timespec64(&extra_info.btime, btime);
3893 p += sizeof(*btime);
3894 ceph_decode_64_safe(&p, end, extra_info.change_attr, bad);
3895 }
3896
3897 if (msg_version >= 11) {
3898 u32 flags;
3899
3900 ceph_decode_32_safe(&p, end, flags, bad);
3901
3902 extra_info.dirstat_valid = true;
3903 ceph_decode_64_safe(&p, end, extra_info.nfiles, bad);
3904 ceph_decode_64_safe(&p, end, extra_info.nsubdirs, bad);
3905 }
3906
3907
3908 inode = ceph_find_inode(mdsc->fsc->sb, vino);
3909 ci = ceph_inode(inode);
3910 dout(" op %s ino %llx.%llx inode %p\n", ceph_cap_op_name(op), vino.ino,
3911 vino.snap, inode);
3912
3913 mutex_lock(&session->s_mutex);
3914 session->s_seq++;
3915 dout(" mds%d seq %lld cap seq %u\n", session->s_mds, session->s_seq,
3916 (unsigned)seq);
3917
3918 if (!inode) {
3919 dout(" i don't have ino %llx\n", vino.ino);
3920
3921 if (op == CEPH_CAP_OP_IMPORT) {
3922 cap = ceph_get_cap(mdsc, NULL);
3923 cap->cap_ino = vino.ino;
3924 cap->queue_release = 1;
3925 cap->cap_id = le64_to_cpu(h->cap_id);
3926 cap->mseq = mseq;
3927 cap->seq = seq;
3928 cap->issue_seq = seq;
3929 spin_lock(&session->s_cap_lock);
3930 __ceph_queue_cap_release(session, cap);
3931 spin_unlock(&session->s_cap_lock);
3932 }
3933 goto done;
3934 }
3935
3936
3937 switch (op) {
3938 case CEPH_CAP_OP_FLUSHSNAP_ACK:
3939 handle_cap_flushsnap_ack(inode, le64_to_cpu(msg->hdr.tid),
3940 h, session);
3941 goto done;
3942
3943 case CEPH_CAP_OP_EXPORT:
3944 handle_cap_export(inode, h, peer, session);
3945 goto done_unlocked;
3946
3947 case CEPH_CAP_OP_IMPORT:
3948 realm = NULL;
3949 if (snaptrace_len) {
3950 down_write(&mdsc->snap_rwsem);
3951 ceph_update_snap_trace(mdsc, snaptrace,
3952 snaptrace + snaptrace_len,
3953 false, &realm);
3954 downgrade_write(&mdsc->snap_rwsem);
3955 } else {
3956 down_read(&mdsc->snap_rwsem);
3957 }
3958 handle_cap_import(mdsc, inode, h, peer, session,
3959 &cap, &extra_info.issued);
3960 handle_cap_grant(inode, session, cap,
3961 h, msg->middle, &extra_info);
3962 if (realm)
3963 ceph_put_snap_realm(mdsc, realm);
3964 goto done_unlocked;
3965 }
3966
3967
3968 spin_lock(&ci->i_ceph_lock);
3969 cap = __get_cap_for_mds(ceph_inode(inode), session->s_mds);
3970 if (!cap) {
3971 dout(" no cap on %p ino %llx.%llx from mds%d\n",
3972 inode, ceph_ino(inode), ceph_snap(inode),
3973 session->s_mds);
3974 spin_unlock(&ci->i_ceph_lock);
3975 goto flush_cap_releases;
3976 }
3977
3978
3979 switch (op) {
3980 case CEPH_CAP_OP_REVOKE:
3981 case CEPH_CAP_OP_GRANT:
3982 __ceph_caps_issued(ci, &extra_info.issued);
3983 extra_info.issued |= __ceph_caps_dirty(ci);
3984 handle_cap_grant(inode, session, cap,
3985 h, msg->middle, &extra_info);
3986 goto done_unlocked;
3987
3988 case CEPH_CAP_OP_FLUSH_ACK:
3989 handle_cap_flush_ack(inode, le64_to_cpu(msg->hdr.tid),
3990 h, session, cap);
3991 break;
3992
3993 case CEPH_CAP_OP_TRUNC:
3994 handle_cap_trunc(inode, h, session);
3995 break;
3996
3997 default:
3998 spin_unlock(&ci->i_ceph_lock);
3999 pr_err("ceph_handle_caps: unknown cap op %d %s\n", op,
4000 ceph_cap_op_name(op));
4001 }
4002
4003done:
4004 mutex_unlock(&session->s_mutex);
4005done_unlocked:
4006 ceph_put_string(extra_info.pool_ns);
4007
4008 ceph_async_iput(inode);
4009 return;
4010
4011flush_cap_releases:
4012
4013
4014
4015
4016
4017 ceph_flush_cap_releases(mdsc, session);
4018 goto done;
4019
4020bad:
4021 pr_err("ceph_handle_caps: corrupt message\n");
4022 ceph_msg_dump(msg);
4023 return;
4024}
4025
4026
4027
4028
4029void ceph_check_delayed_caps(struct ceph_mds_client *mdsc)
4030{
4031 struct inode *inode;
4032 struct ceph_inode_info *ci;
4033 int flags = CHECK_CAPS_NODELAY;
4034
4035 dout("check_delayed_caps\n");
4036 while (1) {
4037 spin_lock(&mdsc->cap_delay_lock);
4038 if (list_empty(&mdsc->cap_delay_list))
4039 break;
4040 ci = list_first_entry(&mdsc->cap_delay_list,
4041 struct ceph_inode_info,
4042 i_cap_delay_list);
4043 if ((ci->i_ceph_flags & CEPH_I_FLUSH) == 0 &&
4044 time_before(jiffies, ci->i_hold_caps_max))
4045 break;
4046 list_del_init(&ci->i_cap_delay_list);
4047
4048 inode = igrab(&ci->vfs_inode);
4049 spin_unlock(&mdsc->cap_delay_lock);
4050
4051 if (inode) {
4052 dout("check_delayed_caps on %p\n", inode);
4053 ceph_check_caps(ci, flags, NULL);
4054
4055 ceph_async_iput(inode);
4056 }
4057 }
4058 spin_unlock(&mdsc->cap_delay_lock);
4059}
4060
4061
4062
4063
4064void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc)
4065{
4066 struct ceph_inode_info *ci;
4067 struct inode *inode;
4068
4069 dout("flush_dirty_caps\n");
4070 spin_lock(&mdsc->cap_dirty_lock);
4071 while (!list_empty(&mdsc->cap_dirty)) {
4072 ci = list_first_entry(&mdsc->cap_dirty, struct ceph_inode_info,
4073 i_dirty_item);
4074 inode = &ci->vfs_inode;
4075 ihold(inode);
4076 dout("flush_dirty_caps %p\n", inode);
4077 spin_unlock(&mdsc->cap_dirty_lock);
4078 ceph_check_caps(ci, CHECK_CAPS_NODELAY|CHECK_CAPS_FLUSH, NULL);
4079 iput(inode);
4080 spin_lock(&mdsc->cap_dirty_lock);
4081 }
4082 spin_unlock(&mdsc->cap_dirty_lock);
4083 dout("flush_dirty_caps done\n");
4084}
4085
4086void __ceph_get_fmode(struct ceph_inode_info *ci, int fmode)
4087{
4088 int i;
4089 int bits = (fmode << 1) | 1;
4090 for (i = 0; i < CEPH_FILE_MODE_BITS; i++) {
4091 if (bits & (1 << i))
4092 ci->i_nr_by_mode[i]++;
4093 }
4094}
4095
4096
4097
4098
4099
4100
4101void ceph_put_fmode(struct ceph_inode_info *ci, int fmode)
4102{
4103 int i, last = 0;
4104 int bits = (fmode << 1) | 1;
4105 spin_lock(&ci->i_ceph_lock);
4106 for (i = 0; i < CEPH_FILE_MODE_BITS; i++) {
4107 if (bits & (1 << i)) {
4108 BUG_ON(ci->i_nr_by_mode[i] == 0);
4109 if (--ci->i_nr_by_mode[i] == 0)
4110 last++;
4111 }
4112 }
4113 dout("put_fmode %p fmode %d {%d,%d,%d,%d}\n",
4114 &ci->vfs_inode, fmode,
4115 ci->i_nr_by_mode[0], ci->i_nr_by_mode[1],
4116 ci->i_nr_by_mode[2], ci->i_nr_by_mode[3]);
4117 spin_unlock(&ci->i_ceph_lock);
4118
4119 if (last && ci->i_vino.snap == CEPH_NOSNAP)
4120 ceph_check_caps(ci, 0, NULL);
4121}
4122
4123
4124
4125
4126
4127
4128
4129int ceph_drop_caps_for_unlink(struct inode *inode)
4130{
4131 struct ceph_inode_info *ci = ceph_inode(inode);
4132 int drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;
4133
4134 spin_lock(&ci->i_ceph_lock);
4135 if (inode->i_nlink == 1) {
4136 drop |= ~(__ceph_caps_wanted(ci) | CEPH_CAP_PIN);
4137
4138 ci->i_ceph_flags |= CEPH_I_NODELAY;
4139 if (__ceph_caps_dirty(ci)) {
4140 struct ceph_mds_client *mdsc =
4141 ceph_inode_to_client(inode)->mdsc;
4142 __cap_delay_requeue_front(mdsc, ci);
4143 }
4144 }
4145 spin_unlock(&ci->i_ceph_lock);
4146 return drop;
4147}
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157int ceph_encode_inode_release(void **p, struct inode *inode,
4158 int mds, int drop, int unless, int force)
4159{
4160 struct ceph_inode_info *ci = ceph_inode(inode);
4161 struct ceph_cap *cap;
4162 struct ceph_mds_request_release *rel = *p;
4163 int used, dirty;
4164 int ret = 0;
4165
4166 spin_lock(&ci->i_ceph_lock);
4167 used = __ceph_caps_used(ci);
4168 dirty = __ceph_caps_dirty(ci);
4169
4170 dout("encode_inode_release %p mds%d used|dirty %s drop %s unless %s\n",
4171 inode, mds, ceph_cap_string(used|dirty), ceph_cap_string(drop),
4172 ceph_cap_string(unless));
4173
4174
4175 drop &= ~(used | dirty);
4176
4177 cap = __get_cap_for_mds(ci, mds);
4178 if (cap && __cap_is_valid(cap)) {
4179 unless &= cap->issued;
4180 if (unless) {
4181 if (unless & CEPH_CAP_AUTH_EXCL)
4182 drop &= ~CEPH_CAP_AUTH_SHARED;
4183 if (unless & CEPH_CAP_LINK_EXCL)
4184 drop &= ~CEPH_CAP_LINK_SHARED;
4185 if (unless & CEPH_CAP_XATTR_EXCL)
4186 drop &= ~CEPH_CAP_XATTR_SHARED;
4187 if (unless & CEPH_CAP_FILE_EXCL)
4188 drop &= ~CEPH_CAP_FILE_SHARED;
4189 }
4190
4191 if (force || (cap->issued & drop)) {
4192 if (cap->issued & drop) {
4193 int wanted = __ceph_caps_wanted(ci);
4194 if ((ci->i_ceph_flags & CEPH_I_NODELAY) == 0)
4195 wanted |= cap->mds_wanted;
4196 dout("encode_inode_release %p cap %p "
4197 "%s -> %s, wanted %s -> %s\n", inode, cap,
4198 ceph_cap_string(cap->issued),
4199 ceph_cap_string(cap->issued & ~drop),
4200 ceph_cap_string(cap->mds_wanted),
4201 ceph_cap_string(wanted));
4202
4203 cap->issued &= ~drop;
4204 cap->implemented &= ~drop;
4205 cap->mds_wanted = wanted;
4206 } else {
4207 dout("encode_inode_release %p cap %p %s"
4208 " (force)\n", inode, cap,
4209 ceph_cap_string(cap->issued));
4210 }
4211
4212 rel->ino = cpu_to_le64(ceph_ino(inode));
4213 rel->cap_id = cpu_to_le64(cap->cap_id);
4214 rel->seq = cpu_to_le32(cap->seq);
4215 rel->issue_seq = cpu_to_le32(cap->issue_seq);
4216 rel->mseq = cpu_to_le32(cap->mseq);
4217 rel->caps = cpu_to_le32(cap->implemented);
4218 rel->wanted = cpu_to_le32(cap->mds_wanted);
4219 rel->dname_len = 0;
4220 rel->dname_seq = 0;
4221 *p += sizeof(*rel);
4222 ret = 1;
4223 } else {
4224 dout("encode_inode_release %p cap %p %s (noop)\n",
4225 inode, cap, ceph_cap_string(cap->issued));
4226 }
4227 }
4228 spin_unlock(&ci->i_ceph_lock);
4229 return ret;
4230}
4231
4232int ceph_encode_dentry_release(void **p, struct dentry *dentry,
4233 struct inode *dir,
4234 int mds, int drop, int unless)
4235{
4236 struct dentry *parent = NULL;
4237 struct ceph_mds_request_release *rel = *p;
4238 struct ceph_dentry_info *di = ceph_dentry(dentry);
4239 int force = 0;
4240 int ret;
4241
4242
4243
4244
4245
4246
4247
4248 spin_lock(&dentry->d_lock);
4249 if (di->lease_session && di->lease_session->s_mds == mds)
4250 force = 1;
4251 if (!dir) {
4252 parent = dget(dentry->d_parent);
4253 dir = d_inode(parent);
4254 }
4255 spin_unlock(&dentry->d_lock);
4256
4257 ret = ceph_encode_inode_release(p, dir, mds, drop, unless, force);
4258 dput(parent);
4259
4260 spin_lock(&dentry->d_lock);
4261 if (ret && di->lease_session && di->lease_session->s_mds == mds) {
4262 dout("encode_dentry_release %p mds%d seq %d\n",
4263 dentry, mds, (int)di->lease_seq);
4264 rel->dname_len = cpu_to_le32(dentry->d_name.len);
4265 memcpy(*p, dentry->d_name.name, dentry->d_name.len);
4266 *p += dentry->d_name.len;
4267 rel->dname_seq = cpu_to_le32(di->lease_seq);
4268 __ceph_mdsc_drop_dentry_lease(dentry);
4269 }
4270 spin_unlock(&dentry->d_lock);
4271 return ret;
4272}
4273