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Merge tag 'for-linus-20160523' of git://git.infradead.org/linux-mtd
[deliverable/linux.git] / fs / xfs / xfs_qm.c
1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_bit.h"
25 #include "xfs_sb.h"
26 #include "xfs_mount.h"
27 #include "xfs_inode.h"
28 #include "xfs_ialloc.h"
29 #include "xfs_itable.h"
30 #include "xfs_quota.h"
31 #include "xfs_error.h"
32 #include "xfs_bmap.h"
33 #include "xfs_bmap_btree.h"
34 #include "xfs_trans.h"
35 #include "xfs_trans_space.h"
36 #include "xfs_qm.h"
37 #include "xfs_trace.h"
38 #include "xfs_icache.h"
39 #include "xfs_cksum.h"
40
41 /*
42 * The global quota manager. There is only one of these for the entire
43 * system, _not_ one per file system. XQM keeps track of the overall
44 * quota functionality, including maintaining the freelist and hash
45 * tables of dquots.
46 */
47 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
48 STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
49
50
51 STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
52 /*
53 * We use the batch lookup interface to iterate over the dquots as it
54 * currently is the only interface into the radix tree code that allows
55 * fuzzy lookups instead of exact matches. Holding the lock over multiple
56 * operations is fine as all callers are used either during mount/umount
57 * or quotaoff.
58 */
59 #define XFS_DQ_LOOKUP_BATCH 32
60
61 STATIC int
62 xfs_qm_dquot_walk(
63 struct xfs_mount *mp,
64 int type,
65 int (*execute)(struct xfs_dquot *dqp, void *data),
66 void *data)
67 {
68 struct xfs_quotainfo *qi = mp->m_quotainfo;
69 struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
70 uint32_t next_index;
71 int last_error = 0;
72 int skipped;
73 int nr_found;
74
75 restart:
76 skipped = 0;
77 next_index = 0;
78 nr_found = 0;
79
80 while (1) {
81 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
82 int error = 0;
83 int i;
84
85 mutex_lock(&qi->qi_tree_lock);
86 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
87 next_index, XFS_DQ_LOOKUP_BATCH);
88 if (!nr_found) {
89 mutex_unlock(&qi->qi_tree_lock);
90 break;
91 }
92
93 for (i = 0; i < nr_found; i++) {
94 struct xfs_dquot *dqp = batch[i];
95
96 next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
97
98 error = execute(batch[i], data);
99 if (error == -EAGAIN) {
100 skipped++;
101 continue;
102 }
103 if (error && last_error != -EFSCORRUPTED)
104 last_error = error;
105 }
106
107 mutex_unlock(&qi->qi_tree_lock);
108
109 /* bail out if the filesystem is corrupted. */
110 if (last_error == -EFSCORRUPTED) {
111 skipped = 0;
112 break;
113 }
114 }
115
116 if (skipped) {
117 delay(1);
118 goto restart;
119 }
120
121 return last_error;
122 }
123
124
125 /*
126 * Purge a dquot from all tracking data structures and free it.
127 */
128 STATIC int
129 xfs_qm_dqpurge(
130 struct xfs_dquot *dqp,
131 void *data)
132 {
133 struct xfs_mount *mp = dqp->q_mount;
134 struct xfs_quotainfo *qi = mp->m_quotainfo;
135
136 xfs_dqlock(dqp);
137 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
138 xfs_dqunlock(dqp);
139 return -EAGAIN;
140 }
141
142 dqp->dq_flags |= XFS_DQ_FREEING;
143
144 xfs_dqflock(dqp);
145
146 /*
147 * If we are turning this type of quotas off, we don't care
148 * about the dirty metadata sitting in this dquot. OTOH, if
149 * we're unmounting, we do care, so we flush it and wait.
150 */
151 if (XFS_DQ_IS_DIRTY(dqp)) {
152 struct xfs_buf *bp = NULL;
153 int error;
154
155 /*
156 * We don't care about getting disk errors here. We need
157 * to purge this dquot anyway, so we go ahead regardless.
158 */
159 error = xfs_qm_dqflush(dqp, &bp);
160 if (error) {
161 xfs_warn(mp, "%s: dquot %p flush failed",
162 __func__, dqp);
163 } else {
164 error = xfs_bwrite(bp);
165 xfs_buf_relse(bp);
166 }
167 xfs_dqflock(dqp);
168 }
169
170 ASSERT(atomic_read(&dqp->q_pincount) == 0);
171 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
172 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
173
174 xfs_dqfunlock(dqp);
175 xfs_dqunlock(dqp);
176
177 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
178 be32_to_cpu(dqp->q_core.d_id));
179 qi->qi_dquots--;
180
181 /*
182 * We move dquots to the freelist as soon as their reference count
183 * hits zero, so it really should be on the freelist here.
184 */
185 ASSERT(!list_empty(&dqp->q_lru));
186 list_lru_del(&qi->qi_lru, &dqp->q_lru);
187 XFS_STATS_DEC(mp, xs_qm_dquot_unused);
188
189 xfs_qm_dqdestroy(dqp);
190 return 0;
191 }
192
193 /*
194 * Purge the dquot cache.
195 */
196 void
197 xfs_qm_dqpurge_all(
198 struct xfs_mount *mp,
199 uint flags)
200 {
201 if (flags & XFS_QMOPT_UQUOTA)
202 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
203 if (flags & XFS_QMOPT_GQUOTA)
204 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
205 if (flags & XFS_QMOPT_PQUOTA)
206 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
207 }
208
209 /*
210 * Just destroy the quotainfo structure.
211 */
212 void
213 xfs_qm_unmount(
214 struct xfs_mount *mp)
215 {
216 if (mp->m_quotainfo) {
217 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
218 xfs_qm_destroy_quotainfo(mp);
219 }
220 }
221
222 /*
223 * Called from the vfsops layer.
224 */
225 void
226 xfs_qm_unmount_quotas(
227 xfs_mount_t *mp)
228 {
229 /*
230 * Release the dquots that root inode, et al might be holding,
231 * before we flush quotas and blow away the quotainfo structure.
232 */
233 ASSERT(mp->m_rootip);
234 xfs_qm_dqdetach(mp->m_rootip);
235 if (mp->m_rbmip)
236 xfs_qm_dqdetach(mp->m_rbmip);
237 if (mp->m_rsumip)
238 xfs_qm_dqdetach(mp->m_rsumip);
239
240 /*
241 * Release the quota inodes.
242 */
243 if (mp->m_quotainfo) {
244 if (mp->m_quotainfo->qi_uquotaip) {
245 IRELE(mp->m_quotainfo->qi_uquotaip);
246 mp->m_quotainfo->qi_uquotaip = NULL;
247 }
248 if (mp->m_quotainfo->qi_gquotaip) {
249 IRELE(mp->m_quotainfo->qi_gquotaip);
250 mp->m_quotainfo->qi_gquotaip = NULL;
251 }
252 if (mp->m_quotainfo->qi_pquotaip) {
253 IRELE(mp->m_quotainfo->qi_pquotaip);
254 mp->m_quotainfo->qi_pquotaip = NULL;
255 }
256 }
257 }
258
259 STATIC int
260 xfs_qm_dqattach_one(
261 xfs_inode_t *ip,
262 xfs_dqid_t id,
263 uint type,
264 uint doalloc,
265 xfs_dquot_t **IO_idqpp)
266 {
267 xfs_dquot_t *dqp;
268 int error;
269
270 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
271 error = 0;
272
273 /*
274 * See if we already have it in the inode itself. IO_idqpp is &i_udquot
275 * or &i_gdquot. This made the code look weird, but made the logic a lot
276 * simpler.
277 */
278 dqp = *IO_idqpp;
279 if (dqp) {
280 trace_xfs_dqattach_found(dqp);
281 return 0;
282 }
283
284 /*
285 * Find the dquot from somewhere. This bumps the reference count of
286 * dquot and returns it locked. This can return ENOENT if dquot didn't
287 * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
288 * turned off suddenly.
289 */
290 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
291 doalloc | XFS_QMOPT_DOWARN, &dqp);
292 if (error)
293 return error;
294
295 trace_xfs_dqattach_get(dqp);
296
297 /*
298 * dqget may have dropped and re-acquired the ilock, but it guarantees
299 * that the dquot returned is the one that should go in the inode.
300 */
301 *IO_idqpp = dqp;
302 xfs_dqunlock(dqp);
303 return 0;
304 }
305
306 static bool
307 xfs_qm_need_dqattach(
308 struct xfs_inode *ip)
309 {
310 struct xfs_mount *mp = ip->i_mount;
311
312 if (!XFS_IS_QUOTA_RUNNING(mp))
313 return false;
314 if (!XFS_IS_QUOTA_ON(mp))
315 return false;
316 if (!XFS_NOT_DQATTACHED(mp, ip))
317 return false;
318 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
319 return false;
320 return true;
321 }
322
323 /*
324 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
325 * into account.
326 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
327 * Inode may get unlocked and relocked in here, and the caller must deal with
328 * the consequences.
329 */
330 int
331 xfs_qm_dqattach_locked(
332 xfs_inode_t *ip,
333 uint flags)
334 {
335 xfs_mount_t *mp = ip->i_mount;
336 int error = 0;
337
338 if (!xfs_qm_need_dqattach(ip))
339 return 0;
340
341 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
342
343 if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
344 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
345 flags & XFS_QMOPT_DQALLOC,
346 &ip->i_udquot);
347 if (error)
348 goto done;
349 ASSERT(ip->i_udquot);
350 }
351
352 if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
353 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
354 flags & XFS_QMOPT_DQALLOC,
355 &ip->i_gdquot);
356 if (error)
357 goto done;
358 ASSERT(ip->i_gdquot);
359 }
360
361 if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
362 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
363 flags & XFS_QMOPT_DQALLOC,
364 &ip->i_pdquot);
365 if (error)
366 goto done;
367 ASSERT(ip->i_pdquot);
368 }
369
370 done:
371 /*
372 * Don't worry about the dquots that we may have attached before any
373 * error - they'll get detached later if it has not already been done.
374 */
375 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
376 return error;
377 }
378
379 int
380 xfs_qm_dqattach(
381 struct xfs_inode *ip,
382 uint flags)
383 {
384 int error;
385
386 if (!xfs_qm_need_dqattach(ip))
387 return 0;
388
389 xfs_ilock(ip, XFS_ILOCK_EXCL);
390 error = xfs_qm_dqattach_locked(ip, flags);
391 xfs_iunlock(ip, XFS_ILOCK_EXCL);
392
393 return error;
394 }
395
396 /*
397 * Release dquots (and their references) if any.
398 * The inode should be locked EXCL except when this's called by
399 * xfs_ireclaim.
400 */
401 void
402 xfs_qm_dqdetach(
403 xfs_inode_t *ip)
404 {
405 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
406 return;
407
408 trace_xfs_dquot_dqdetach(ip);
409
410 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
411 if (ip->i_udquot) {
412 xfs_qm_dqrele(ip->i_udquot);
413 ip->i_udquot = NULL;
414 }
415 if (ip->i_gdquot) {
416 xfs_qm_dqrele(ip->i_gdquot);
417 ip->i_gdquot = NULL;
418 }
419 if (ip->i_pdquot) {
420 xfs_qm_dqrele(ip->i_pdquot);
421 ip->i_pdquot = NULL;
422 }
423 }
424
425 struct xfs_qm_isolate {
426 struct list_head buffers;
427 struct list_head dispose;
428 };
429
430 static enum lru_status
431 xfs_qm_dquot_isolate(
432 struct list_head *item,
433 struct list_lru_one *lru,
434 spinlock_t *lru_lock,
435 void *arg)
436 __releases(lru_lock) __acquires(lru_lock)
437 {
438 struct xfs_dquot *dqp = container_of(item,
439 struct xfs_dquot, q_lru);
440 struct xfs_qm_isolate *isol = arg;
441
442 if (!xfs_dqlock_nowait(dqp))
443 goto out_miss_busy;
444
445 /*
446 * This dquot has acquired a reference in the meantime remove it from
447 * the freelist and try again.
448 */
449 if (dqp->q_nrefs) {
450 xfs_dqunlock(dqp);
451 XFS_STATS_INC(dqp->q_mount, xs_qm_dqwants);
452
453 trace_xfs_dqreclaim_want(dqp);
454 list_lru_isolate(lru, &dqp->q_lru);
455 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
456 return LRU_REMOVED;
457 }
458
459 /*
460 * If the dquot is dirty, flush it. If it's already being flushed, just
461 * skip it so there is time for the IO to complete before we try to
462 * reclaim it again on the next LRU pass.
463 */
464 if (!xfs_dqflock_nowait(dqp)) {
465 xfs_dqunlock(dqp);
466 goto out_miss_busy;
467 }
468
469 if (XFS_DQ_IS_DIRTY(dqp)) {
470 struct xfs_buf *bp = NULL;
471 int error;
472
473 trace_xfs_dqreclaim_dirty(dqp);
474
475 /* we have to drop the LRU lock to flush the dquot */
476 spin_unlock(lru_lock);
477
478 error = xfs_qm_dqflush(dqp, &bp);
479 if (error) {
480 xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
481 __func__, dqp);
482 goto out_unlock_dirty;
483 }
484
485 xfs_buf_delwri_queue(bp, &isol->buffers);
486 xfs_buf_relse(bp);
487 goto out_unlock_dirty;
488 }
489 xfs_dqfunlock(dqp);
490
491 /*
492 * Prevent lookups now that we are past the point of no return.
493 */
494 dqp->dq_flags |= XFS_DQ_FREEING;
495 xfs_dqunlock(dqp);
496
497 ASSERT(dqp->q_nrefs == 0);
498 list_lru_isolate_move(lru, &dqp->q_lru, &isol->dispose);
499 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
500 trace_xfs_dqreclaim_done(dqp);
501 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaims);
502 return LRU_REMOVED;
503
504 out_miss_busy:
505 trace_xfs_dqreclaim_busy(dqp);
506 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
507 return LRU_SKIP;
508
509 out_unlock_dirty:
510 trace_xfs_dqreclaim_busy(dqp);
511 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
512 xfs_dqunlock(dqp);
513 spin_lock(lru_lock);
514 return LRU_RETRY;
515 }
516
517 static unsigned long
518 xfs_qm_shrink_scan(
519 struct shrinker *shrink,
520 struct shrink_control *sc)
521 {
522 struct xfs_quotainfo *qi = container_of(shrink,
523 struct xfs_quotainfo, qi_shrinker);
524 struct xfs_qm_isolate isol;
525 unsigned long freed;
526 int error;
527
528 if ((sc->gfp_mask & (__GFP_FS|__GFP_DIRECT_RECLAIM)) != (__GFP_FS|__GFP_DIRECT_RECLAIM))
529 return 0;
530
531 INIT_LIST_HEAD(&isol.buffers);
532 INIT_LIST_HEAD(&isol.dispose);
533
534 freed = list_lru_shrink_walk(&qi->qi_lru, sc,
535 xfs_qm_dquot_isolate, &isol);
536
537 error = xfs_buf_delwri_submit(&isol.buffers);
538 if (error)
539 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
540
541 while (!list_empty(&isol.dispose)) {
542 struct xfs_dquot *dqp;
543
544 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
545 list_del_init(&dqp->q_lru);
546 xfs_qm_dqfree_one(dqp);
547 }
548
549 return freed;
550 }
551
552 static unsigned long
553 xfs_qm_shrink_count(
554 struct shrinker *shrink,
555 struct shrink_control *sc)
556 {
557 struct xfs_quotainfo *qi = container_of(shrink,
558 struct xfs_quotainfo, qi_shrinker);
559
560 return list_lru_shrink_count(&qi->qi_lru, sc);
561 }
562
563 STATIC void
564 xfs_qm_set_defquota(
565 xfs_mount_t *mp,
566 uint type,
567 xfs_quotainfo_t *qinf)
568 {
569 xfs_dquot_t *dqp;
570 struct xfs_def_quota *defq;
571 int error;
572
573 error = xfs_qm_dqread(mp, 0, type, XFS_QMOPT_DOWARN, &dqp);
574
575 if (!error) {
576 xfs_disk_dquot_t *ddqp = &dqp->q_core;
577
578 defq = xfs_get_defquota(dqp, qinf);
579
580 /*
581 * Timers and warnings have been already set, let's just set the
582 * default limits for this quota type
583 */
584 defq->bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
585 defq->bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
586 defq->ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
587 defq->isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
588 defq->rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
589 defq->rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
590 xfs_qm_dqdestroy(dqp);
591 }
592 }
593
594 /*
595 * This initializes all the quota information that's kept in the
596 * mount structure
597 */
598 STATIC int
599 xfs_qm_init_quotainfo(
600 xfs_mount_t *mp)
601 {
602 xfs_quotainfo_t *qinf;
603 int error;
604 xfs_dquot_t *dqp;
605
606 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
607
608 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
609
610 error = list_lru_init(&qinf->qi_lru);
611 if (error)
612 goto out_free_qinf;
613
614 /*
615 * See if quotainodes are setup, and if not, allocate them,
616 * and change the superblock accordingly.
617 */
618 error = xfs_qm_init_quotainos(mp);
619 if (error)
620 goto out_free_lru;
621
622 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
623 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
624 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
625 mutex_init(&qinf->qi_tree_lock);
626
627 /* mutex used to serialize quotaoffs */
628 mutex_init(&qinf->qi_quotaofflock);
629
630 /* Precalc some constants */
631 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
632 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
633
634 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
635
636 /*
637 * We try to get the limits from the superuser's limits fields.
638 * This is quite hacky, but it is standard quota practice.
639 *
640 * Since we may not have done a quotacheck by this point, just read
641 * the dquot without attaching it to any hashtables or lists.
642 *
643 * Timers and warnings are globally set by the first timer found in
644 * user/group/proj quota types, otherwise a default value is used.
645 * This should be split into different fields per quota type.
646 */
647 error = xfs_qm_dqread(mp, 0,
648 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
649 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
650 XFS_DQ_PROJ),
651 XFS_QMOPT_DOWARN, &dqp);
652
653 if (!error) {
654 xfs_disk_dquot_t *ddqp = &dqp->q_core;
655
656 /*
657 * The warnings and timers set the grace period given to
658 * a user or group before he or she can not perform any
659 * more writing. If it is zero, a default is used.
660 */
661 qinf->qi_btimelimit = ddqp->d_btimer ?
662 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
663 qinf->qi_itimelimit = ddqp->d_itimer ?
664 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
665 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
666 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
667 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
668 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
669 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
670 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
671 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
672 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
673 xfs_qm_dqdestroy(dqp);
674 } else {
675 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
676 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
677 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
678 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
679 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
680 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
681 }
682
683 if (XFS_IS_UQUOTA_RUNNING(mp))
684 xfs_qm_set_defquota(mp, XFS_DQ_USER, qinf);
685 if (XFS_IS_GQUOTA_RUNNING(mp))
686 xfs_qm_set_defquota(mp, XFS_DQ_GROUP, qinf);
687 if (XFS_IS_PQUOTA_RUNNING(mp))
688 xfs_qm_set_defquota(mp, XFS_DQ_PROJ, qinf);
689
690 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
691 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
692 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
693 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
694 register_shrinker(&qinf->qi_shrinker);
695 return 0;
696
697 out_free_lru:
698 list_lru_destroy(&qinf->qi_lru);
699 out_free_qinf:
700 kmem_free(qinf);
701 mp->m_quotainfo = NULL;
702 return error;
703 }
704
705
706 /*
707 * Gets called when unmounting a filesystem or when all quotas get
708 * turned off.
709 * This purges the quota inodes, destroys locks and frees itself.
710 */
711 void
712 xfs_qm_destroy_quotainfo(
713 xfs_mount_t *mp)
714 {
715 xfs_quotainfo_t *qi;
716
717 qi = mp->m_quotainfo;
718 ASSERT(qi != NULL);
719
720 unregister_shrinker(&qi->qi_shrinker);
721 list_lru_destroy(&qi->qi_lru);
722
723 if (qi->qi_uquotaip) {
724 IRELE(qi->qi_uquotaip);
725 qi->qi_uquotaip = NULL; /* paranoia */
726 }
727 if (qi->qi_gquotaip) {
728 IRELE(qi->qi_gquotaip);
729 qi->qi_gquotaip = NULL;
730 }
731 if (qi->qi_pquotaip) {
732 IRELE(qi->qi_pquotaip);
733 qi->qi_pquotaip = NULL;
734 }
735 mutex_destroy(&qi->qi_quotaofflock);
736 kmem_free(qi);
737 mp->m_quotainfo = NULL;
738 }
739
740 /*
741 * Create an inode and return with a reference already taken, but unlocked
742 * This is how we create quota inodes
743 */
744 STATIC int
745 xfs_qm_qino_alloc(
746 xfs_mount_t *mp,
747 xfs_inode_t **ip,
748 uint flags)
749 {
750 xfs_trans_t *tp;
751 int error;
752 int committed;
753 bool need_alloc = true;
754
755 *ip = NULL;
756 /*
757 * With superblock that doesn't have separate pquotino, we
758 * share an inode between gquota and pquota. If the on-disk
759 * superblock has GQUOTA and the filesystem is now mounted
760 * with PQUOTA, just use sb_gquotino for sb_pquotino and
761 * vice-versa.
762 */
763 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
764 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
765 xfs_ino_t ino = NULLFSINO;
766
767 if ((flags & XFS_QMOPT_PQUOTA) &&
768 (mp->m_sb.sb_gquotino != NULLFSINO)) {
769 ino = mp->m_sb.sb_gquotino;
770 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
771 } else if ((flags & XFS_QMOPT_GQUOTA) &&
772 (mp->m_sb.sb_pquotino != NULLFSINO)) {
773 ino = mp->m_sb.sb_pquotino;
774 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
775 }
776 if (ino != NULLFSINO) {
777 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
778 if (error)
779 return error;
780 mp->m_sb.sb_gquotino = NULLFSINO;
781 mp->m_sb.sb_pquotino = NULLFSINO;
782 need_alloc = false;
783 }
784 }
785
786 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
787 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create,
788 XFS_QM_QINOCREATE_SPACE_RES(mp), 0);
789 if (error) {
790 xfs_trans_cancel(tp);
791 return error;
792 }
793
794 if (need_alloc) {
795 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
796 &committed);
797 if (error) {
798 xfs_trans_cancel(tp);
799 return error;
800 }
801 }
802
803 /*
804 * Make the changes in the superblock, and log those too.
805 * sbfields arg may contain fields other than *QUOTINO;
806 * VERSIONNUM for example.
807 */
808 spin_lock(&mp->m_sb_lock);
809 if (flags & XFS_QMOPT_SBVERSION) {
810 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
811
812 xfs_sb_version_addquota(&mp->m_sb);
813 mp->m_sb.sb_uquotino = NULLFSINO;
814 mp->m_sb.sb_gquotino = NULLFSINO;
815 mp->m_sb.sb_pquotino = NULLFSINO;
816
817 /* qflags will get updated fully _after_ quotacheck */
818 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
819 }
820 if (flags & XFS_QMOPT_UQUOTA)
821 mp->m_sb.sb_uquotino = (*ip)->i_ino;
822 else if (flags & XFS_QMOPT_GQUOTA)
823 mp->m_sb.sb_gquotino = (*ip)->i_ino;
824 else
825 mp->m_sb.sb_pquotino = (*ip)->i_ino;
826 spin_unlock(&mp->m_sb_lock);
827 xfs_log_sb(tp);
828
829 error = xfs_trans_commit(tp);
830 if (error) {
831 ASSERT(XFS_FORCED_SHUTDOWN(mp));
832 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
833 }
834 if (need_alloc)
835 xfs_finish_inode_setup(*ip);
836 return error;
837 }
838
839
840 STATIC void
841 xfs_qm_reset_dqcounts(
842 xfs_mount_t *mp,
843 xfs_buf_t *bp,
844 xfs_dqid_t id,
845 uint type)
846 {
847 struct xfs_dqblk *dqb;
848 int j;
849
850 trace_xfs_reset_dqcounts(bp, _RET_IP_);
851
852 /*
853 * Reset all counters and timers. They'll be
854 * started afresh by xfs_qm_quotacheck.
855 */
856 #ifdef DEBUG
857 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
858 do_div(j, sizeof(xfs_dqblk_t));
859 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
860 #endif
861 dqb = bp->b_addr;
862 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
863 struct xfs_disk_dquot *ddq;
864
865 ddq = (struct xfs_disk_dquot *)&dqb[j];
866
867 /*
868 * Do a sanity check, and if needed, repair the dqblk. Don't
869 * output any warnings because it's perfectly possible to
870 * find uninitialised dquot blks. See comment in xfs_dqcheck.
871 */
872 xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
873 "xfs_quotacheck");
874 /*
875 * Reset type in case we are reusing group quota file for
876 * project quotas or vice versa
877 */
878 ddq->d_flags = type;
879 ddq->d_bcount = 0;
880 ddq->d_icount = 0;
881 ddq->d_rtbcount = 0;
882 ddq->d_btimer = 0;
883 ddq->d_itimer = 0;
884 ddq->d_rtbtimer = 0;
885 ddq->d_bwarns = 0;
886 ddq->d_iwarns = 0;
887 ddq->d_rtbwarns = 0;
888
889 if (xfs_sb_version_hascrc(&mp->m_sb)) {
890 xfs_update_cksum((char *)&dqb[j],
891 sizeof(struct xfs_dqblk),
892 XFS_DQUOT_CRC_OFF);
893 }
894 }
895 }
896
897 STATIC int
898 xfs_qm_dqiter_bufs(
899 struct xfs_mount *mp,
900 xfs_dqid_t firstid,
901 xfs_fsblock_t bno,
902 xfs_filblks_t blkcnt,
903 uint flags,
904 struct list_head *buffer_list)
905 {
906 struct xfs_buf *bp;
907 int error;
908 int type;
909
910 ASSERT(blkcnt > 0);
911 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
912 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
913 error = 0;
914
915 /*
916 * Blkcnt arg can be a very big number, and might even be
917 * larger than the log itself. So, we have to break it up into
918 * manageable-sized transactions.
919 * Note that we don't start a permanent transaction here; we might
920 * not be able to get a log reservation for the whole thing up front,
921 * and we don't really care to either, because we just discard
922 * everything if we were to crash in the middle of this loop.
923 */
924 while (blkcnt--) {
925 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
926 XFS_FSB_TO_DADDR(mp, bno),
927 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
928 &xfs_dquot_buf_ops);
929
930 /*
931 * CRC and validation errors will return a EFSCORRUPTED here. If
932 * this occurs, re-read without CRC validation so that we can
933 * repair the damage via xfs_qm_reset_dqcounts(). This process
934 * will leave a trace in the log indicating corruption has
935 * been detected.
936 */
937 if (error == -EFSCORRUPTED) {
938 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
939 XFS_FSB_TO_DADDR(mp, bno),
940 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
941 NULL);
942 }
943
944 if (error)
945 break;
946
947 /*
948 * A corrupt buffer might not have a verifier attached, so
949 * make sure we have the correct one attached before writeback
950 * occurs.
951 */
952 bp->b_ops = &xfs_dquot_buf_ops;
953 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
954 xfs_buf_delwri_queue(bp, buffer_list);
955 xfs_buf_relse(bp);
956
957 /* goto the next block. */
958 bno++;
959 firstid += mp->m_quotainfo->qi_dqperchunk;
960 }
961
962 return error;
963 }
964
965 /*
966 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
967 * caller supplied function for every chunk of dquots that we find.
968 */
969 STATIC int
970 xfs_qm_dqiterate(
971 struct xfs_mount *mp,
972 struct xfs_inode *qip,
973 uint flags,
974 struct list_head *buffer_list)
975 {
976 struct xfs_bmbt_irec *map;
977 int i, nmaps; /* number of map entries */
978 int error; /* return value */
979 xfs_fileoff_t lblkno;
980 xfs_filblks_t maxlblkcnt;
981 xfs_dqid_t firstid;
982 xfs_fsblock_t rablkno;
983 xfs_filblks_t rablkcnt;
984
985 error = 0;
986 /*
987 * This looks racy, but we can't keep an inode lock across a
988 * trans_reserve. But, this gets called during quotacheck, and that
989 * happens only at mount time which is single threaded.
990 */
991 if (qip->i_d.di_nblocks == 0)
992 return 0;
993
994 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
995
996 lblkno = 0;
997 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
998 do {
999 uint lock_mode;
1000
1001 nmaps = XFS_DQITER_MAP_SIZE;
1002 /*
1003 * We aren't changing the inode itself. Just changing
1004 * some of its data. No new blocks are added here, and
1005 * the inode is never added to the transaction.
1006 */
1007 lock_mode = xfs_ilock_data_map_shared(qip);
1008 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1009 map, &nmaps, 0);
1010 xfs_iunlock(qip, lock_mode);
1011 if (error)
1012 break;
1013
1014 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1015 for (i = 0; i < nmaps; i++) {
1016 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1017 ASSERT(map[i].br_blockcount);
1018
1019
1020 lblkno += map[i].br_blockcount;
1021
1022 if (map[i].br_startblock == HOLESTARTBLOCK)
1023 continue;
1024
1025 firstid = (xfs_dqid_t) map[i].br_startoff *
1026 mp->m_quotainfo->qi_dqperchunk;
1027 /*
1028 * Do a read-ahead on the next extent.
1029 */
1030 if ((i+1 < nmaps) &&
1031 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1032 rablkcnt = map[i+1].br_blockcount;
1033 rablkno = map[i+1].br_startblock;
1034 while (rablkcnt--) {
1035 xfs_buf_readahead(mp->m_ddev_targp,
1036 XFS_FSB_TO_DADDR(mp, rablkno),
1037 mp->m_quotainfo->qi_dqchunklen,
1038 &xfs_dquot_buf_ops);
1039 rablkno++;
1040 }
1041 }
1042 /*
1043 * Iterate thru all the blks in the extent and
1044 * reset the counters of all the dquots inside them.
1045 */
1046 error = xfs_qm_dqiter_bufs(mp, firstid,
1047 map[i].br_startblock,
1048 map[i].br_blockcount,
1049 flags, buffer_list);
1050 if (error)
1051 goto out;
1052 }
1053 } while (nmaps > 0);
1054
1055 out:
1056 kmem_free(map);
1057 return error;
1058 }
1059
1060 /*
1061 * Called by dqusage_adjust in doing a quotacheck.
1062 *
1063 * Given the inode, and a dquot id this updates both the incore dqout as well
1064 * as the buffer copy. This is so that once the quotacheck is done, we can
1065 * just log all the buffers, as opposed to logging numerous updates to
1066 * individual dquots.
1067 */
1068 STATIC int
1069 xfs_qm_quotacheck_dqadjust(
1070 struct xfs_inode *ip,
1071 xfs_dqid_t id,
1072 uint type,
1073 xfs_qcnt_t nblks,
1074 xfs_qcnt_t rtblks)
1075 {
1076 struct xfs_mount *mp = ip->i_mount;
1077 struct xfs_dquot *dqp;
1078 int error;
1079
1080 error = xfs_qm_dqget(mp, ip, id, type,
1081 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1082 if (error) {
1083 /*
1084 * Shouldn't be able to turn off quotas here.
1085 */
1086 ASSERT(error != -ESRCH);
1087 ASSERT(error != -ENOENT);
1088 return error;
1089 }
1090
1091 trace_xfs_dqadjust(dqp);
1092
1093 /*
1094 * Adjust the inode count and the block count to reflect this inode's
1095 * resource usage.
1096 */
1097 be64_add_cpu(&dqp->q_core.d_icount, 1);
1098 dqp->q_res_icount++;
1099 if (nblks) {
1100 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1101 dqp->q_res_bcount += nblks;
1102 }
1103 if (rtblks) {
1104 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1105 dqp->q_res_rtbcount += rtblks;
1106 }
1107
1108 /*
1109 * Set default limits, adjust timers (since we changed usages)
1110 *
1111 * There are no timers for the default values set in the root dquot.
1112 */
1113 if (dqp->q_core.d_id) {
1114 xfs_qm_adjust_dqlimits(mp, dqp);
1115 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1116 }
1117
1118 dqp->dq_flags |= XFS_DQ_DIRTY;
1119 xfs_qm_dqput(dqp);
1120 return 0;
1121 }
1122
1123 STATIC int
1124 xfs_qm_get_rtblks(
1125 xfs_inode_t *ip,
1126 xfs_qcnt_t *O_rtblks)
1127 {
1128 xfs_filblks_t rtblks; /* total rt blks */
1129 xfs_extnum_t idx; /* extent record index */
1130 xfs_ifork_t *ifp; /* inode fork pointer */
1131 xfs_extnum_t nextents; /* number of extent entries */
1132 int error;
1133
1134 ASSERT(XFS_IS_REALTIME_INODE(ip));
1135 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1136 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1137 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1138 return error;
1139 }
1140 rtblks = 0;
1141 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1142 for (idx = 0; idx < nextents; idx++)
1143 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1144 *O_rtblks = (xfs_qcnt_t)rtblks;
1145 return 0;
1146 }
1147
1148 /*
1149 * callback routine supplied to bulkstat(). Given an inumber, find its
1150 * dquots and update them to account for resources taken by that inode.
1151 */
1152 /* ARGSUSED */
1153 STATIC int
1154 xfs_qm_dqusage_adjust(
1155 xfs_mount_t *mp, /* mount point for filesystem */
1156 xfs_ino_t ino, /* inode number to get data for */
1157 void __user *buffer, /* not used */
1158 int ubsize, /* not used */
1159 int *ubused, /* not used */
1160 int *res) /* result code value */
1161 {
1162 xfs_inode_t *ip;
1163 xfs_qcnt_t nblks, rtblks = 0;
1164 int error;
1165
1166 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1167
1168 /*
1169 * rootino must have its resources accounted for, not so with the quota
1170 * inodes.
1171 */
1172 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1173 *res = BULKSTAT_RV_NOTHING;
1174 return -EINVAL;
1175 }
1176
1177 /*
1178 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1179 * interface expects the inode to be exclusively locked because that's
1180 * the case in all other instances. It's OK that we do this because
1181 * quotacheck is done only at mount time.
1182 */
1183 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1184 if (error) {
1185 *res = BULKSTAT_RV_NOTHING;
1186 return error;
1187 }
1188
1189 ASSERT(ip->i_delayed_blks == 0);
1190
1191 if (XFS_IS_REALTIME_INODE(ip)) {
1192 /*
1193 * Walk thru the extent list and count the realtime blocks.
1194 */
1195 error = xfs_qm_get_rtblks(ip, &rtblks);
1196 if (error)
1197 goto error0;
1198 }
1199
1200 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1201
1202 /*
1203 * Add the (disk blocks and inode) resources occupied by this
1204 * inode to its dquots. We do this adjustment in the incore dquot,
1205 * and also copy the changes to its buffer.
1206 * We don't care about putting these changes in a transaction
1207 * envelope because if we crash in the middle of a 'quotacheck'
1208 * we have to start from the beginning anyway.
1209 * Once we're done, we'll log all the dquot bufs.
1210 *
1211 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1212 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1213 */
1214 if (XFS_IS_UQUOTA_ON(mp)) {
1215 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1216 XFS_DQ_USER, nblks, rtblks);
1217 if (error)
1218 goto error0;
1219 }
1220
1221 if (XFS_IS_GQUOTA_ON(mp)) {
1222 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1223 XFS_DQ_GROUP, nblks, rtblks);
1224 if (error)
1225 goto error0;
1226 }
1227
1228 if (XFS_IS_PQUOTA_ON(mp)) {
1229 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1230 XFS_DQ_PROJ, nblks, rtblks);
1231 if (error)
1232 goto error0;
1233 }
1234
1235 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1236 IRELE(ip);
1237 *res = BULKSTAT_RV_DIDONE;
1238 return 0;
1239
1240 error0:
1241 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1242 IRELE(ip);
1243 *res = BULKSTAT_RV_GIVEUP;
1244 return error;
1245 }
1246
1247 STATIC int
1248 xfs_qm_flush_one(
1249 struct xfs_dquot *dqp,
1250 void *data)
1251 {
1252 struct list_head *buffer_list = data;
1253 struct xfs_buf *bp = NULL;
1254 int error = 0;
1255
1256 xfs_dqlock(dqp);
1257 if (dqp->dq_flags & XFS_DQ_FREEING)
1258 goto out_unlock;
1259 if (!XFS_DQ_IS_DIRTY(dqp))
1260 goto out_unlock;
1261
1262 xfs_dqflock(dqp);
1263 error = xfs_qm_dqflush(dqp, &bp);
1264 if (error)
1265 goto out_unlock;
1266
1267 xfs_buf_delwri_queue(bp, buffer_list);
1268 xfs_buf_relse(bp);
1269 out_unlock:
1270 xfs_dqunlock(dqp);
1271 return error;
1272 }
1273
1274 /*
1275 * Walk thru all the filesystem inodes and construct a consistent view
1276 * of the disk quota world. If the quotacheck fails, disable quotas.
1277 */
1278 STATIC int
1279 xfs_qm_quotacheck(
1280 xfs_mount_t *mp)
1281 {
1282 int done, count, error, error2;
1283 xfs_ino_t lastino;
1284 size_t structsz;
1285 uint flags;
1286 LIST_HEAD (buffer_list);
1287 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1288 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1289 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1290
1291 count = INT_MAX;
1292 structsz = 1;
1293 lastino = 0;
1294 flags = 0;
1295
1296 ASSERT(uip || gip || pip);
1297 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1298
1299 xfs_notice(mp, "Quotacheck needed: Please wait.");
1300
1301 /*
1302 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1303 * their counters to zero. We need a clean slate.
1304 * We don't log our changes till later.
1305 */
1306 if (uip) {
1307 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1308 &buffer_list);
1309 if (error)
1310 goto error_return;
1311 flags |= XFS_UQUOTA_CHKD;
1312 }
1313
1314 if (gip) {
1315 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1316 &buffer_list);
1317 if (error)
1318 goto error_return;
1319 flags |= XFS_GQUOTA_CHKD;
1320 }
1321
1322 if (pip) {
1323 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1324 &buffer_list);
1325 if (error)
1326 goto error_return;
1327 flags |= XFS_PQUOTA_CHKD;
1328 }
1329
1330 do {
1331 /*
1332 * Iterate thru all the inodes in the file system,
1333 * adjusting the corresponding dquot counters in core.
1334 */
1335 error = xfs_bulkstat(mp, &lastino, &count,
1336 xfs_qm_dqusage_adjust,
1337 structsz, NULL, &done);
1338 if (error)
1339 break;
1340
1341 } while (!done);
1342
1343 /*
1344 * We've made all the changes that we need to make incore. Flush them
1345 * down to disk buffers if everything was updated successfully.
1346 */
1347 if (XFS_IS_UQUOTA_ON(mp)) {
1348 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1349 &buffer_list);
1350 }
1351 if (XFS_IS_GQUOTA_ON(mp)) {
1352 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1353 &buffer_list);
1354 if (!error)
1355 error = error2;
1356 }
1357 if (XFS_IS_PQUOTA_ON(mp)) {
1358 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1359 &buffer_list);
1360 if (!error)
1361 error = error2;
1362 }
1363
1364 error2 = xfs_buf_delwri_submit(&buffer_list);
1365 if (!error)
1366 error = error2;
1367
1368 /*
1369 * We can get this error if we couldn't do a dquot allocation inside
1370 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1371 * dirty dquots that might be cached, we just want to get rid of them
1372 * and turn quotaoff. The dquots won't be attached to any of the inodes
1373 * at this point (because we intentionally didn't in dqget_noattach).
1374 */
1375 if (error) {
1376 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1377 goto error_return;
1378 }
1379
1380 /*
1381 * If one type of quotas is off, then it will lose its
1382 * quotachecked status, since we won't be doing accounting for
1383 * that type anymore.
1384 */
1385 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1386 mp->m_qflags |= flags;
1387
1388 error_return:
1389 while (!list_empty(&buffer_list)) {
1390 struct xfs_buf *bp =
1391 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1392 list_del_init(&bp->b_list);
1393 xfs_buf_relse(bp);
1394 }
1395
1396 if (error) {
1397 xfs_warn(mp,
1398 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1399 error);
1400 /*
1401 * We must turn off quotas.
1402 */
1403 ASSERT(mp->m_quotainfo != NULL);
1404 xfs_qm_destroy_quotainfo(mp);
1405 if (xfs_mount_reset_sbqflags(mp)) {
1406 xfs_warn(mp,
1407 "Quotacheck: Failed to reset quota flags.");
1408 }
1409 } else
1410 xfs_notice(mp, "Quotacheck: Done.");
1411 return error;
1412 }
1413
1414 /*
1415 * This is called from xfs_mountfs to start quotas and initialize all
1416 * necessary data structures like quotainfo. This is also responsible for
1417 * running a quotacheck as necessary. We are guaranteed that the superblock
1418 * is consistently read in at this point.
1419 *
1420 * If we fail here, the mount will continue with quota turned off. We don't
1421 * need to inidicate success or failure at all.
1422 */
1423 void
1424 xfs_qm_mount_quotas(
1425 struct xfs_mount *mp)
1426 {
1427 int error = 0;
1428 uint sbf;
1429
1430 /*
1431 * If quotas on realtime volumes is not supported, we disable
1432 * quotas immediately.
1433 */
1434 if (mp->m_sb.sb_rextents) {
1435 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
1436 mp->m_qflags = 0;
1437 goto write_changes;
1438 }
1439
1440 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1441
1442 /*
1443 * Allocate the quotainfo structure inside the mount struct, and
1444 * create quotainode(s), and change/rev superblock if necessary.
1445 */
1446 error = xfs_qm_init_quotainfo(mp);
1447 if (error) {
1448 /*
1449 * We must turn off quotas.
1450 */
1451 ASSERT(mp->m_quotainfo == NULL);
1452 mp->m_qflags = 0;
1453 goto write_changes;
1454 }
1455 /*
1456 * If any of the quotas are not consistent, do a quotacheck.
1457 */
1458 if (XFS_QM_NEED_QUOTACHECK(mp)) {
1459 error = xfs_qm_quotacheck(mp);
1460 if (error) {
1461 /* Quotacheck failed and disabled quotas. */
1462 return;
1463 }
1464 }
1465 /*
1466 * If one type of quotas is off, then it will lose its
1467 * quotachecked status, since we won't be doing accounting for
1468 * that type anymore.
1469 */
1470 if (!XFS_IS_UQUOTA_ON(mp))
1471 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
1472 if (!XFS_IS_GQUOTA_ON(mp))
1473 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
1474 if (!XFS_IS_PQUOTA_ON(mp))
1475 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
1476
1477 write_changes:
1478 /*
1479 * We actually don't have to acquire the m_sb_lock at all.
1480 * This can only be called from mount, and that's single threaded. XXX
1481 */
1482 spin_lock(&mp->m_sb_lock);
1483 sbf = mp->m_sb.sb_qflags;
1484 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
1485 spin_unlock(&mp->m_sb_lock);
1486
1487 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
1488 if (xfs_sync_sb(mp, false)) {
1489 /*
1490 * We could only have been turning quotas off.
1491 * We aren't in very good shape actually because
1492 * the incore structures are convinced that quotas are
1493 * off, but the on disk superblock doesn't know that !
1494 */
1495 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
1496 xfs_alert(mp, "%s: Superblock update failed!",
1497 __func__);
1498 }
1499 }
1500
1501 if (error) {
1502 xfs_warn(mp, "Failed to initialize disk quotas.");
1503 return;
1504 }
1505 }
1506
1507 /*
1508 * This is called after the superblock has been read in and we're ready to
1509 * iget the quota inodes.
1510 */
1511 STATIC int
1512 xfs_qm_init_quotainos(
1513 xfs_mount_t *mp)
1514 {
1515 struct xfs_inode *uip = NULL;
1516 struct xfs_inode *gip = NULL;
1517 struct xfs_inode *pip = NULL;
1518 int error;
1519 uint flags = 0;
1520
1521 ASSERT(mp->m_quotainfo);
1522
1523 /*
1524 * Get the uquota and gquota inodes
1525 */
1526 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1527 if (XFS_IS_UQUOTA_ON(mp) &&
1528 mp->m_sb.sb_uquotino != NULLFSINO) {
1529 ASSERT(mp->m_sb.sb_uquotino > 0);
1530 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1531 0, 0, &uip);
1532 if (error)
1533 return error;
1534 }
1535 if (XFS_IS_GQUOTA_ON(mp) &&
1536 mp->m_sb.sb_gquotino != NULLFSINO) {
1537 ASSERT(mp->m_sb.sb_gquotino > 0);
1538 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1539 0, 0, &gip);
1540 if (error)
1541 goto error_rele;
1542 }
1543 if (XFS_IS_PQUOTA_ON(mp) &&
1544 mp->m_sb.sb_pquotino != NULLFSINO) {
1545 ASSERT(mp->m_sb.sb_pquotino > 0);
1546 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1547 0, 0, &pip);
1548 if (error)
1549 goto error_rele;
1550 }
1551 } else {
1552 flags |= XFS_QMOPT_SBVERSION;
1553 }
1554
1555 /*
1556 * Create the three inodes, if they don't exist already. The changes
1557 * made above will get added to a transaction and logged in one of
1558 * the qino_alloc calls below. If the device is readonly,
1559 * temporarily switch to read-write to do this.
1560 */
1561 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1562 error = xfs_qm_qino_alloc(mp, &uip,
1563 flags | XFS_QMOPT_UQUOTA);
1564 if (error)
1565 goto error_rele;
1566
1567 flags &= ~XFS_QMOPT_SBVERSION;
1568 }
1569 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1570 error = xfs_qm_qino_alloc(mp, &gip,
1571 flags | XFS_QMOPT_GQUOTA);
1572 if (error)
1573 goto error_rele;
1574
1575 flags &= ~XFS_QMOPT_SBVERSION;
1576 }
1577 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1578 error = xfs_qm_qino_alloc(mp, &pip,
1579 flags | XFS_QMOPT_PQUOTA);
1580 if (error)
1581 goto error_rele;
1582 }
1583
1584 mp->m_quotainfo->qi_uquotaip = uip;
1585 mp->m_quotainfo->qi_gquotaip = gip;
1586 mp->m_quotainfo->qi_pquotaip = pip;
1587
1588 return 0;
1589
1590 error_rele:
1591 if (uip)
1592 IRELE(uip);
1593 if (gip)
1594 IRELE(gip);
1595 if (pip)
1596 IRELE(pip);
1597 return error;
1598 }
1599
1600 STATIC void
1601 xfs_qm_dqfree_one(
1602 struct xfs_dquot *dqp)
1603 {
1604 struct xfs_mount *mp = dqp->q_mount;
1605 struct xfs_quotainfo *qi = mp->m_quotainfo;
1606
1607 mutex_lock(&qi->qi_tree_lock);
1608 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1609 be32_to_cpu(dqp->q_core.d_id));
1610
1611 qi->qi_dquots--;
1612 mutex_unlock(&qi->qi_tree_lock);
1613
1614 xfs_qm_dqdestroy(dqp);
1615 }
1616
1617 /* --------------- utility functions for vnodeops ---------------- */
1618
1619
1620 /*
1621 * Given an inode, a uid, gid and prid make sure that we have
1622 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1623 * quotas by creating this file.
1624 * This also attaches dquot(s) to the given inode after locking it,
1625 * and returns the dquots corresponding to the uid and/or gid.
1626 *
1627 * in : inode (unlocked)
1628 * out : udquot, gdquot with references taken and unlocked
1629 */
1630 int
1631 xfs_qm_vop_dqalloc(
1632 struct xfs_inode *ip,
1633 xfs_dqid_t uid,
1634 xfs_dqid_t gid,
1635 prid_t prid,
1636 uint flags,
1637 struct xfs_dquot **O_udqpp,
1638 struct xfs_dquot **O_gdqpp,
1639 struct xfs_dquot **O_pdqpp)
1640 {
1641 struct xfs_mount *mp = ip->i_mount;
1642 struct xfs_dquot *uq = NULL;
1643 struct xfs_dquot *gq = NULL;
1644 struct xfs_dquot *pq = NULL;
1645 int error;
1646 uint lockflags;
1647
1648 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1649 return 0;
1650
1651 lockflags = XFS_ILOCK_EXCL;
1652 xfs_ilock(ip, lockflags);
1653
1654 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1655 gid = ip->i_d.di_gid;
1656
1657 /*
1658 * Attach the dquot(s) to this inode, doing a dquot allocation
1659 * if necessary. The dquot(s) will not be locked.
1660 */
1661 if (XFS_NOT_DQATTACHED(mp, ip)) {
1662 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1663 if (error) {
1664 xfs_iunlock(ip, lockflags);
1665 return error;
1666 }
1667 }
1668
1669 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1670 if (ip->i_d.di_uid != uid) {
1671 /*
1672 * What we need is the dquot that has this uid, and
1673 * if we send the inode to dqget, the uid of the inode
1674 * takes priority over what's sent in the uid argument.
1675 * We must unlock inode here before calling dqget if
1676 * we're not sending the inode, because otherwise
1677 * we'll deadlock by doing trans_reserve while
1678 * holding ilock.
1679 */
1680 xfs_iunlock(ip, lockflags);
1681 error = xfs_qm_dqget(mp, NULL, uid,
1682 XFS_DQ_USER,
1683 XFS_QMOPT_DQALLOC |
1684 XFS_QMOPT_DOWARN,
1685 &uq);
1686 if (error) {
1687 ASSERT(error != -ENOENT);
1688 return error;
1689 }
1690 /*
1691 * Get the ilock in the right order.
1692 */
1693 xfs_dqunlock(uq);
1694 lockflags = XFS_ILOCK_SHARED;
1695 xfs_ilock(ip, lockflags);
1696 } else {
1697 /*
1698 * Take an extra reference, because we'll return
1699 * this to caller
1700 */
1701 ASSERT(ip->i_udquot);
1702 uq = xfs_qm_dqhold(ip->i_udquot);
1703 }
1704 }
1705 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1706 if (ip->i_d.di_gid != gid) {
1707 xfs_iunlock(ip, lockflags);
1708 error = xfs_qm_dqget(mp, NULL, gid,
1709 XFS_DQ_GROUP,
1710 XFS_QMOPT_DQALLOC |
1711 XFS_QMOPT_DOWARN,
1712 &gq);
1713 if (error) {
1714 ASSERT(error != -ENOENT);
1715 goto error_rele;
1716 }
1717 xfs_dqunlock(gq);
1718 lockflags = XFS_ILOCK_SHARED;
1719 xfs_ilock(ip, lockflags);
1720 } else {
1721 ASSERT(ip->i_gdquot);
1722 gq = xfs_qm_dqhold(ip->i_gdquot);
1723 }
1724 }
1725 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1726 if (xfs_get_projid(ip) != prid) {
1727 xfs_iunlock(ip, lockflags);
1728 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1729 XFS_DQ_PROJ,
1730 XFS_QMOPT_DQALLOC |
1731 XFS_QMOPT_DOWARN,
1732 &pq);
1733 if (error) {
1734 ASSERT(error != -ENOENT);
1735 goto error_rele;
1736 }
1737 xfs_dqunlock(pq);
1738 lockflags = XFS_ILOCK_SHARED;
1739 xfs_ilock(ip, lockflags);
1740 } else {
1741 ASSERT(ip->i_pdquot);
1742 pq = xfs_qm_dqhold(ip->i_pdquot);
1743 }
1744 }
1745 if (uq)
1746 trace_xfs_dquot_dqalloc(ip);
1747
1748 xfs_iunlock(ip, lockflags);
1749 if (O_udqpp)
1750 *O_udqpp = uq;
1751 else
1752 xfs_qm_dqrele(uq);
1753 if (O_gdqpp)
1754 *O_gdqpp = gq;
1755 else
1756 xfs_qm_dqrele(gq);
1757 if (O_pdqpp)
1758 *O_pdqpp = pq;
1759 else
1760 xfs_qm_dqrele(pq);
1761 return 0;
1762
1763 error_rele:
1764 xfs_qm_dqrele(gq);
1765 xfs_qm_dqrele(uq);
1766 return error;
1767 }
1768
1769 /*
1770 * Actually transfer ownership, and do dquot modifications.
1771 * These were already reserved.
1772 */
1773 xfs_dquot_t *
1774 xfs_qm_vop_chown(
1775 xfs_trans_t *tp,
1776 xfs_inode_t *ip,
1777 xfs_dquot_t **IO_olddq,
1778 xfs_dquot_t *newdq)
1779 {
1780 xfs_dquot_t *prevdq;
1781 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1782 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1783
1784
1785 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1786 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1787
1788 /* old dquot */
1789 prevdq = *IO_olddq;
1790 ASSERT(prevdq);
1791 ASSERT(prevdq != newdq);
1792
1793 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1794 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1795
1796 /* the sparkling new dquot */
1797 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1798 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1799
1800 /*
1801 * Take an extra reference, because the inode is going to keep
1802 * this dquot pointer even after the trans_commit.
1803 */
1804 *IO_olddq = xfs_qm_dqhold(newdq);
1805
1806 return prevdq;
1807 }
1808
1809 /*
1810 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1811 */
1812 int
1813 xfs_qm_vop_chown_reserve(
1814 struct xfs_trans *tp,
1815 struct xfs_inode *ip,
1816 struct xfs_dquot *udqp,
1817 struct xfs_dquot *gdqp,
1818 struct xfs_dquot *pdqp,
1819 uint flags)
1820 {
1821 struct xfs_mount *mp = ip->i_mount;
1822 uint delblks, blkflags, prjflags = 0;
1823 struct xfs_dquot *udq_unres = NULL;
1824 struct xfs_dquot *gdq_unres = NULL;
1825 struct xfs_dquot *pdq_unres = NULL;
1826 struct xfs_dquot *udq_delblks = NULL;
1827 struct xfs_dquot *gdq_delblks = NULL;
1828 struct xfs_dquot *pdq_delblks = NULL;
1829 int error;
1830
1831
1832 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1833 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1834
1835 delblks = ip->i_delayed_blks;
1836 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1837 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1838
1839 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1840 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
1841 udq_delblks = udqp;
1842 /*
1843 * If there are delayed allocation blocks, then we have to
1844 * unreserve those from the old dquot, and add them to the
1845 * new dquot.
1846 */
1847 if (delblks) {
1848 ASSERT(ip->i_udquot);
1849 udq_unres = ip->i_udquot;
1850 }
1851 }
1852 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1853 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1854 gdq_delblks = gdqp;
1855 if (delblks) {
1856 ASSERT(ip->i_gdquot);
1857 gdq_unres = ip->i_gdquot;
1858 }
1859 }
1860
1861 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1862 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
1863 prjflags = XFS_QMOPT_ENOSPC;
1864 pdq_delblks = pdqp;
1865 if (delblks) {
1866 ASSERT(ip->i_pdquot);
1867 pdq_unres = ip->i_pdquot;
1868 }
1869 }
1870
1871 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1872 udq_delblks, gdq_delblks, pdq_delblks,
1873 ip->i_d.di_nblocks, 1,
1874 flags | blkflags | prjflags);
1875 if (error)
1876 return error;
1877
1878 /*
1879 * Do the delayed blks reservations/unreservations now. Since, these
1880 * are done without the help of a transaction, if a reservation fails
1881 * its previous reservations won't be automatically undone by trans
1882 * code. So, we have to do it manually here.
1883 */
1884 if (delblks) {
1885 /*
1886 * Do the reservations first. Unreservation can't fail.
1887 */
1888 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
1889 ASSERT(udq_unres || gdq_unres || pdq_unres);
1890 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1891 udq_delblks, gdq_delblks, pdq_delblks,
1892 (xfs_qcnt_t)delblks, 0,
1893 flags | blkflags | prjflags);
1894 if (error)
1895 return error;
1896 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1897 udq_unres, gdq_unres, pdq_unres,
1898 -((xfs_qcnt_t)delblks), 0, blkflags);
1899 }
1900
1901 return 0;
1902 }
1903
1904 int
1905 xfs_qm_vop_rename_dqattach(
1906 struct xfs_inode **i_tab)
1907 {
1908 struct xfs_mount *mp = i_tab[0]->i_mount;
1909 int i;
1910
1911 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1912 return 0;
1913
1914 for (i = 0; (i < 4 && i_tab[i]); i++) {
1915 struct xfs_inode *ip = i_tab[i];
1916 int error;
1917
1918 /*
1919 * Watch out for duplicate entries in the table.
1920 */
1921 if (i == 0 || ip != i_tab[i-1]) {
1922 if (XFS_NOT_DQATTACHED(mp, ip)) {
1923 error = xfs_qm_dqattach(ip, 0);
1924 if (error)
1925 return error;
1926 }
1927 }
1928 }
1929 return 0;
1930 }
1931
1932 void
1933 xfs_qm_vop_create_dqattach(
1934 struct xfs_trans *tp,
1935 struct xfs_inode *ip,
1936 struct xfs_dquot *udqp,
1937 struct xfs_dquot *gdqp,
1938 struct xfs_dquot *pdqp)
1939 {
1940 struct xfs_mount *mp = tp->t_mountp;
1941
1942 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1943 return;
1944
1945 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1946 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1947
1948 if (udqp && XFS_IS_UQUOTA_ON(mp)) {
1949 ASSERT(ip->i_udquot == NULL);
1950 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
1951
1952 ip->i_udquot = xfs_qm_dqhold(udqp);
1953 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1954 }
1955 if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
1956 ASSERT(ip->i_gdquot == NULL);
1957 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
1958 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1959 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1960 }
1961 if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
1962 ASSERT(ip->i_pdquot == NULL);
1963 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
1964
1965 ip->i_pdquot = xfs_qm_dqhold(pdqp);
1966 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
1967 }
1968 }
1969
Linux kernel - Deliverables
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