projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'iio-fixes-for-3.16a' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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_ag.h"
27 #include "xfs_mount.h"
28 #include "xfs_inode.h"
29 #include "xfs_ialloc.h"
30 #include "xfs_itable.h"
31 #include "xfs_quota.h"
32 #include "xfs_error.h"
33 #include "xfs_bmap.h"
34 #include "xfs_bmap_btree.h"
35 #include "xfs_trans.h"
36 #include "xfs_trans_space.h"
37 #include "xfs_qm.h"
38 #include "xfs_trace.h"
39 #include "xfs_icache.h"
40 #include "xfs_cksum.h"
41 #include "xfs_dinode.h"
42
43 /*
44 * The global quota manager. There is only one of these for the entire
45 * system, _not_ one per file system. XQM keeps track of the overall
46 * quota functionality, including maintaining the freelist and hash
47 * tables of dquots.
48 */
49 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
50 STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
51
52
53 STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
54 /*
55 * We use the batch lookup interface to iterate over the dquots as it
56 * currently is the only interface into the radix tree code that allows
57 * fuzzy lookups instead of exact matches. Holding the lock over multiple
58 * operations is fine as all callers are used either during mount/umount
59 * or quotaoff.
60 */
61 #define XFS_DQ_LOOKUP_BATCH 32
62
63 STATIC int
64 xfs_qm_dquot_walk(
65 struct xfs_mount *mp,
66 int type,
67 int (*execute)(struct xfs_dquot *dqp, void *data),
68 void *data)
69 {
70 struct xfs_quotainfo *qi = mp->m_quotainfo;
71 struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
72 uint32_t next_index;
73 int last_error = 0;
74 int skipped;
75 int nr_found;
76
77 restart:
78 skipped = 0;
79 next_index = 0;
80 nr_found = 0;
81
82 while (1) {
83 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
84 int error = 0;
85 int i;
86
87 mutex_lock(&qi->qi_tree_lock);
88 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
89 next_index, XFS_DQ_LOOKUP_BATCH);
90 if (!nr_found) {
91 mutex_unlock(&qi->qi_tree_lock);
92 break;
93 }
94
95 for (i = 0; i < nr_found; i++) {
96 struct xfs_dquot *dqp = batch[i];
97
98 next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
99
100 error = execute(batch[i], data);
101 if (error == EAGAIN) {
102 skipped++;
103 continue;
104 }
105 if (error && last_error != EFSCORRUPTED)
106 last_error = error;
107 }
108
109 mutex_unlock(&qi->qi_tree_lock);
110
111 /* bail out if the filesystem is corrupted. */
112 if (last_error == EFSCORRUPTED) {
113 skipped = 0;
114 break;
115 }
116 }
117
118 if (skipped) {
119 delay(1);
120 goto restart;
121 }
122
123 return last_error;
124 }
125
126
127 /*
128 * Purge a dquot from all tracking data structures and free it.
129 */
130 STATIC int
131 xfs_qm_dqpurge(
132 struct xfs_dquot *dqp,
133 void *data)
134 {
135 struct xfs_mount *mp = dqp->q_mount;
136 struct xfs_quotainfo *qi = mp->m_quotainfo;
137
138 xfs_dqlock(dqp);
139 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
140 xfs_dqunlock(dqp);
141 return EAGAIN;
142 }
143
144 dqp->dq_flags |= XFS_DQ_FREEING;
145
146 xfs_dqflock(dqp);
147
148 /*
149 * If we are turning this type of quotas off, we don't care
150 * about the dirty metadata sitting in this dquot. OTOH, if
151 * we're unmounting, we do care, so we flush it and wait.
152 */
153 if (XFS_DQ_IS_DIRTY(dqp)) {
154 struct xfs_buf *bp = NULL;
155 int error;
156
157 /*
158 * We don't care about getting disk errors here. We need
159 * to purge this dquot anyway, so we go ahead regardless.
160 */
161 error = xfs_qm_dqflush(dqp, &bp);
162 if (error) {
163 xfs_warn(mp, "%s: dquot %p flush failed",
164 __func__, dqp);
165 } else {
166 error = xfs_bwrite(bp);
167 xfs_buf_relse(bp);
168 }
169 xfs_dqflock(dqp);
170 }
171
172 ASSERT(atomic_read(&dqp->q_pincount) == 0);
173 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
174 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
175
176 xfs_dqfunlock(dqp);
177 xfs_dqunlock(dqp);
178
179 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
180 be32_to_cpu(dqp->q_core.d_id));
181 qi->qi_dquots--;
182
183 /*
184 * We move dquots to the freelist as soon as their reference count
185 * hits zero, so it really should be on the freelist here.
186 */
187 ASSERT(!list_empty(&dqp->q_lru));
188 list_lru_del(&qi->qi_lru, &dqp->q_lru);
189 XFS_STATS_DEC(xs_qm_dquot_unused);
190
191 xfs_qm_dqdestroy(dqp);
192 return 0;
193 }
194
195 /*
196 * Purge the dquot cache.
197 */
198 void
199 xfs_qm_dqpurge_all(
200 struct xfs_mount *mp,
201 uint flags)
202 {
203 if (flags & XFS_QMOPT_UQUOTA)
204 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
205 if (flags & XFS_QMOPT_GQUOTA)
206 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
207 if (flags & XFS_QMOPT_PQUOTA)
208 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
209 }
210
211 /*
212 * Just destroy the quotainfo structure.
213 */
214 void
215 xfs_qm_unmount(
216 struct xfs_mount *mp)
217 {
218 if (mp->m_quotainfo) {
219 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
220 xfs_qm_destroy_quotainfo(mp);
221 }
222 }
223
224
225 /*
226 * This is called from xfs_mountfs to start quotas and initialize all
227 * necessary data structures like quotainfo. This is also responsible for
228 * running a quotacheck as necessary. We are guaranteed that the superblock
229 * is consistently read in at this point.
230 *
231 * If we fail here, the mount will continue with quota turned off. We don't
232 * need to inidicate success or failure at all.
233 */
234 void
235 xfs_qm_mount_quotas(
236 xfs_mount_t *mp)
237 {
238 int error = 0;
239 uint sbf;
240
241 /*
242 * If quotas on realtime volumes is not supported, we disable
243 * quotas immediately.
244 */
245 if (mp->m_sb.sb_rextents) {
246 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
247 mp->m_qflags = 0;
248 goto write_changes;
249 }
250
251 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
252
253 /*
254 * Allocate the quotainfo structure inside the mount struct, and
255 * create quotainode(s), and change/rev superblock if necessary.
256 */
257 error = xfs_qm_init_quotainfo(mp);
258 if (error) {
259 /*
260 * We must turn off quotas.
261 */
262 ASSERT(mp->m_quotainfo == NULL);
263 mp->m_qflags = 0;
264 goto write_changes;
265 }
266 /*
267 * If any of the quotas are not consistent, do a quotacheck.
268 */
269 if (XFS_QM_NEED_QUOTACHECK(mp)) {
270 error = xfs_qm_quotacheck(mp);
271 if (error) {
272 /* Quotacheck failed and disabled quotas. */
273 return;
274 }
275 }
276 /*
277 * If one type of quotas is off, then it will lose its
278 * quotachecked status, since we won't be doing accounting for
279 * that type anymore.
280 */
281 if (!XFS_IS_UQUOTA_ON(mp))
282 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
283 if (!XFS_IS_GQUOTA_ON(mp))
284 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
285 if (!XFS_IS_PQUOTA_ON(mp))
286 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
287
288 write_changes:
289 /*
290 * We actually don't have to acquire the m_sb_lock at all.
291 * This can only be called from mount, and that's single threaded. XXX
292 */
293 spin_lock(&mp->m_sb_lock);
294 sbf = mp->m_sb.sb_qflags;
295 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
296 spin_unlock(&mp->m_sb_lock);
297
298 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
299 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
300 /*
301 * We could only have been turning quotas off.
302 * We aren't in very good shape actually because
303 * the incore structures are convinced that quotas are
304 * off, but the on disk superblock doesn't know that !
305 */
306 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
307 xfs_alert(mp, "%s: Superblock update failed!",
308 __func__);
309 }
310 }
311
312 if (error) {
313 xfs_warn(mp, "Failed to initialize disk quotas.");
314 return;
315 }
316 }
317
318 /*
319 * Called from the vfsops layer.
320 */
321 void
322 xfs_qm_unmount_quotas(
323 xfs_mount_t *mp)
324 {
325 /*
326 * Release the dquots that root inode, et al might be holding,
327 * before we flush quotas and blow away the quotainfo structure.
328 */
329 ASSERT(mp->m_rootip);
330 xfs_qm_dqdetach(mp->m_rootip);
331 if (mp->m_rbmip)
332 xfs_qm_dqdetach(mp->m_rbmip);
333 if (mp->m_rsumip)
334 xfs_qm_dqdetach(mp->m_rsumip);
335
336 /*
337 * Release the quota inodes.
338 */
339 if (mp->m_quotainfo) {
340 if (mp->m_quotainfo->qi_uquotaip) {
341 IRELE(mp->m_quotainfo->qi_uquotaip);
342 mp->m_quotainfo->qi_uquotaip = NULL;
343 }
344 if (mp->m_quotainfo->qi_gquotaip) {
345 IRELE(mp->m_quotainfo->qi_gquotaip);
346 mp->m_quotainfo->qi_gquotaip = NULL;
347 }
348 if (mp->m_quotainfo->qi_pquotaip) {
349 IRELE(mp->m_quotainfo->qi_pquotaip);
350 mp->m_quotainfo->qi_pquotaip = NULL;
351 }
352 }
353 }
354
355 STATIC int
356 xfs_qm_dqattach_one(
357 xfs_inode_t *ip,
358 xfs_dqid_t id,
359 uint type,
360 uint doalloc,
361 xfs_dquot_t **IO_idqpp)
362 {
363 xfs_dquot_t *dqp;
364 int error;
365
366 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
367 error = 0;
368
369 /*
370 * See if we already have it in the inode itself. IO_idqpp is &i_udquot
371 * or &i_gdquot. This made the code look weird, but made the logic a lot
372 * simpler.
373 */
374 dqp = *IO_idqpp;
375 if (dqp) {
376 trace_xfs_dqattach_found(dqp);
377 return 0;
378 }
379
380 /*
381 * Find the dquot from somewhere. This bumps the reference count of
382 * dquot and returns it locked. This can return ENOENT if dquot didn't
383 * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
384 * turned off suddenly.
385 */
386 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
387 doalloc | XFS_QMOPT_DOWARN, &dqp);
388 if (error)
389 return error;
390
391 trace_xfs_dqattach_get(dqp);
392
393 /*
394 * dqget may have dropped and re-acquired the ilock, but it guarantees
395 * that the dquot returned is the one that should go in the inode.
396 */
397 *IO_idqpp = dqp;
398 xfs_dqunlock(dqp);
399 return 0;
400 }
401
402 static bool
403 xfs_qm_need_dqattach(
404 struct xfs_inode *ip)
405 {
406 struct xfs_mount *mp = ip->i_mount;
407
408 if (!XFS_IS_QUOTA_RUNNING(mp))
409 return false;
410 if (!XFS_IS_QUOTA_ON(mp))
411 return false;
412 if (!XFS_NOT_DQATTACHED(mp, ip))
413 return false;
414 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
415 return false;
416 return true;
417 }
418
419 /*
420 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
421 * into account.
422 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
423 * Inode may get unlocked and relocked in here, and the caller must deal with
424 * the consequences.
425 */
426 int
427 xfs_qm_dqattach_locked(
428 xfs_inode_t *ip,
429 uint flags)
430 {
431 xfs_mount_t *mp = ip->i_mount;
432 int error = 0;
433
434 if (!xfs_qm_need_dqattach(ip))
435 return 0;
436
437 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
438
439 if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
440 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
441 flags & XFS_QMOPT_DQALLOC,
442 &ip->i_udquot);
443 if (error)
444 goto done;
445 ASSERT(ip->i_udquot);
446 }
447
448 if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
449 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
450 flags & XFS_QMOPT_DQALLOC,
451 &ip->i_gdquot);
452 if (error)
453 goto done;
454 ASSERT(ip->i_gdquot);
455 }
456
457 if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
458 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
459 flags & XFS_QMOPT_DQALLOC,
460 &ip->i_pdquot);
461 if (error)
462 goto done;
463 ASSERT(ip->i_pdquot);
464 }
465
466 done:
467 /*
468 * Don't worry about the dquots that we may have attached before any
469 * error - they'll get detached later if it has not already been done.
470 */
471 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
472 return error;
473 }
474
475 int
476 xfs_qm_dqattach(
477 struct xfs_inode *ip,
478 uint flags)
479 {
480 int error;
481
482 if (!xfs_qm_need_dqattach(ip))
483 return 0;
484
485 xfs_ilock(ip, XFS_ILOCK_EXCL);
486 error = xfs_qm_dqattach_locked(ip, flags);
487 xfs_iunlock(ip, XFS_ILOCK_EXCL);
488
489 return error;
490 }
491
492 /*
493 * Release dquots (and their references) if any.
494 * The inode should be locked EXCL except when this's called by
495 * xfs_ireclaim.
496 */
497 void
498 xfs_qm_dqdetach(
499 xfs_inode_t *ip)
500 {
501 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
502 return;
503
504 trace_xfs_dquot_dqdetach(ip);
505
506 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
507 if (ip->i_udquot) {
508 xfs_qm_dqrele(ip->i_udquot);
509 ip->i_udquot = NULL;
510 }
511 if (ip->i_gdquot) {
512 xfs_qm_dqrele(ip->i_gdquot);
513 ip->i_gdquot = NULL;
514 }
515 if (ip->i_pdquot) {
516 xfs_qm_dqrele(ip->i_pdquot);
517 ip->i_pdquot = NULL;
518 }
519 }
520
521 struct xfs_qm_isolate {
522 struct list_head buffers;
523 struct list_head dispose;
524 };
525
526 static enum lru_status
527 xfs_qm_dquot_isolate(
528 struct list_head *item,
529 spinlock_t *lru_lock,
530 void *arg)
531 {
532 struct xfs_dquot *dqp = container_of(item,
533 struct xfs_dquot, q_lru);
534 struct xfs_qm_isolate *isol = arg;
535
536 if (!xfs_dqlock_nowait(dqp))
537 goto out_miss_busy;
538
539 /*
540 * This dquot has acquired a reference in the meantime remove it from
541 * the freelist and try again.
542 */
543 if (dqp->q_nrefs) {
544 xfs_dqunlock(dqp);
545 XFS_STATS_INC(xs_qm_dqwants);
546
547 trace_xfs_dqreclaim_want(dqp);
548 list_del_init(&dqp->q_lru);
549 XFS_STATS_DEC(xs_qm_dquot_unused);
550 return LRU_REMOVED;
551 }
552
553 /*
554 * If the dquot is dirty, flush it. If it's already being flushed, just
555 * skip it so there is time for the IO to complete before we try to
556 * reclaim it again on the next LRU pass.
557 */
558 if (!xfs_dqflock_nowait(dqp)) {
559 xfs_dqunlock(dqp);
560 goto out_miss_busy;
561 }
562
563 if (XFS_DQ_IS_DIRTY(dqp)) {
564 struct xfs_buf *bp = NULL;
565 int error;
566
567 trace_xfs_dqreclaim_dirty(dqp);
568
569 /* we have to drop the LRU lock to flush the dquot */
570 spin_unlock(lru_lock);
571
572 error = xfs_qm_dqflush(dqp, &bp);
573 if (error) {
574 xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
575 __func__, dqp);
576 goto out_unlock_dirty;
577 }
578
579 xfs_buf_delwri_queue(bp, &isol->buffers);
580 xfs_buf_relse(bp);
581 goto out_unlock_dirty;
582 }
583 xfs_dqfunlock(dqp);
584
585 /*
586 * Prevent lookups now that we are past the point of no return.
587 */
588 dqp->dq_flags |= XFS_DQ_FREEING;
589 xfs_dqunlock(dqp);
590
591 ASSERT(dqp->q_nrefs == 0);
592 list_move_tail(&dqp->q_lru, &isol->dispose);
593 XFS_STATS_DEC(xs_qm_dquot_unused);
594 trace_xfs_dqreclaim_done(dqp);
595 XFS_STATS_INC(xs_qm_dqreclaims);
596 return LRU_REMOVED;
597
598 out_miss_busy:
599 trace_xfs_dqreclaim_busy(dqp);
600 XFS_STATS_INC(xs_qm_dqreclaim_misses);
601 return LRU_SKIP;
602
603 out_unlock_dirty:
604 trace_xfs_dqreclaim_busy(dqp);
605 XFS_STATS_INC(xs_qm_dqreclaim_misses);
606 xfs_dqunlock(dqp);
607 spin_lock(lru_lock);
608 return LRU_RETRY;
609 }
610
611 static unsigned long
612 xfs_qm_shrink_scan(
613 struct shrinker *shrink,
614 struct shrink_control *sc)
615 {
616 struct xfs_quotainfo *qi = container_of(shrink,
617 struct xfs_quotainfo, qi_shrinker);
618 struct xfs_qm_isolate isol;
619 unsigned long freed;
620 int error;
621 unsigned long nr_to_scan = sc->nr_to_scan;
622
623 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
624 return 0;
625
626 INIT_LIST_HEAD(&isol.buffers);
627 INIT_LIST_HEAD(&isol.dispose);
628
629 freed = list_lru_walk_node(&qi->qi_lru, sc->nid, xfs_qm_dquot_isolate, &isol,
630 &nr_to_scan);
631
632 error = xfs_buf_delwri_submit(&isol.buffers);
633 if (error)
634 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
635
636 while (!list_empty(&isol.dispose)) {
637 struct xfs_dquot *dqp;
638
639 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
640 list_del_init(&dqp->q_lru);
641 xfs_qm_dqfree_one(dqp);
642 }
643
644 return freed;
645 }
646
647 static unsigned long
648 xfs_qm_shrink_count(
649 struct shrinker *shrink,
650 struct shrink_control *sc)
651 {
652 struct xfs_quotainfo *qi = container_of(shrink,
653 struct xfs_quotainfo, qi_shrinker);
654
655 return list_lru_count_node(&qi->qi_lru, sc->nid);
656 }
657
658 /*
659 * This initializes all the quota information that's kept in the
660 * mount structure
661 */
662 STATIC int
663 xfs_qm_init_quotainfo(
664 xfs_mount_t *mp)
665 {
666 xfs_quotainfo_t *qinf;
667 int error;
668 xfs_dquot_t *dqp;
669
670 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
671
672 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
673
674 error = -list_lru_init(&qinf->qi_lru);
675 if (error)
676 goto out_free_qinf;
677
678 /*
679 * See if quotainodes are setup, and if not, allocate them,
680 * and change the superblock accordingly.
681 */
682 error = xfs_qm_init_quotainos(mp);
683 if (error)
684 goto out_free_lru;
685
686 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
687 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
688 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
689 mutex_init(&qinf->qi_tree_lock);
690
691 /* mutex used to serialize quotaoffs */
692 mutex_init(&qinf->qi_quotaofflock);
693
694 /* Precalc some constants */
695 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
696 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
697
698 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
699
700 /*
701 * We try to get the limits from the superuser's limits fields.
702 * This is quite hacky, but it is standard quota practice.
703 *
704 * We look at the USR dquot with id == 0 first, but if user quotas
705 * are not enabled we goto the GRP dquot with id == 0.
706 * We don't really care to keep separate default limits for user
707 * and group quotas, at least not at this point.
708 *
709 * Since we may not have done a quotacheck by this point, just read
710 * the dquot without attaching it to any hashtables or lists.
711 */
712 error = xfs_qm_dqread(mp, 0,
713 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
714 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
715 XFS_DQ_PROJ),
716 XFS_QMOPT_DOWARN, &dqp);
717 if (!error) {
718 xfs_disk_dquot_t *ddqp = &dqp->q_core;
719
720 /*
721 * The warnings and timers set the grace period given to
722 * a user or group before he or she can not perform any
723 * more writing. If it is zero, a default is used.
724 */
725 qinf->qi_btimelimit = ddqp->d_btimer ?
726 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
727 qinf->qi_itimelimit = ddqp->d_itimer ?
728 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
729 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
730 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
731 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
732 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
733 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
734 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
735 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
736 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
737 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
738 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
739 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
740 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
741 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
742 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
743
744 xfs_qm_dqdestroy(dqp);
745 } else {
746 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
747 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
748 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
749 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
750 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
751 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
752 }
753
754 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
755 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
756 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
757 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
758 register_shrinker(&qinf->qi_shrinker);
759 return 0;
760
761 out_free_lru:
762 list_lru_destroy(&qinf->qi_lru);
763 out_free_qinf:
764 kmem_free(qinf);
765 mp->m_quotainfo = NULL;
766 return error;
767 }
768
769
770 /*
771 * Gets called when unmounting a filesystem or when all quotas get
772 * turned off.
773 * This purges the quota inodes, destroys locks and frees itself.
774 */
775 void
776 xfs_qm_destroy_quotainfo(
777 xfs_mount_t *mp)
778 {
779 xfs_quotainfo_t *qi;
780
781 qi = mp->m_quotainfo;
782 ASSERT(qi != NULL);
783
784 unregister_shrinker(&qi->qi_shrinker);
785 list_lru_destroy(&qi->qi_lru);
786
787 if (qi->qi_uquotaip) {
788 IRELE(qi->qi_uquotaip);
789 qi->qi_uquotaip = NULL; /* paranoia */
790 }
791 if (qi->qi_gquotaip) {
792 IRELE(qi->qi_gquotaip);
793 qi->qi_gquotaip = NULL;
794 }
795 if (qi->qi_pquotaip) {
796 IRELE(qi->qi_pquotaip);
797 qi->qi_pquotaip = NULL;
798 }
799 mutex_destroy(&qi->qi_quotaofflock);
800 kmem_free(qi);
801 mp->m_quotainfo = NULL;
802 }
803
804 /*
805 * Create an inode and return with a reference already taken, but unlocked
806 * This is how we create quota inodes
807 */
808 STATIC int
809 xfs_qm_qino_alloc(
810 xfs_mount_t *mp,
811 xfs_inode_t **ip,
812 __int64_t sbfields,
813 uint flags)
814 {
815 xfs_trans_t *tp;
816 int error;
817 int committed;
818
819 *ip = NULL;
820 /*
821 * With superblock that doesn't have separate pquotino, we
822 * share an inode between gquota and pquota. If the on-disk
823 * superblock has GQUOTA and the filesystem is now mounted
824 * with PQUOTA, just use sb_gquotino for sb_pquotino and
825 * vice-versa.
826 */
827 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
828 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
829 xfs_ino_t ino = NULLFSINO;
830
831 if ((flags & XFS_QMOPT_PQUOTA) &&
832 (mp->m_sb.sb_gquotino != NULLFSINO)) {
833 ino = mp->m_sb.sb_gquotino;
834 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
835 } else if ((flags & XFS_QMOPT_GQUOTA) &&
836 (mp->m_sb.sb_pquotino != NULLFSINO)) {
837 ino = mp->m_sb.sb_pquotino;
838 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
839 }
840 if (ino != NULLFSINO) {
841 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
842 if (error)
843 return error;
844 mp->m_sb.sb_gquotino = NULLFSINO;
845 mp->m_sb.sb_pquotino = NULLFSINO;
846 }
847 }
848
849 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
850 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create,
851 XFS_QM_QINOCREATE_SPACE_RES(mp), 0);
852 if (error) {
853 xfs_trans_cancel(tp, 0);
854 return error;
855 }
856
857 if (!*ip) {
858 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
859 &committed);
860 if (error) {
861 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
862 XFS_TRANS_ABORT);
863 return error;
864 }
865 }
866
867 /*
868 * Make the changes in the superblock, and log those too.
869 * sbfields arg may contain fields other than *QUOTINO;
870 * VERSIONNUM for example.
871 */
872 spin_lock(&mp->m_sb_lock);
873 if (flags & XFS_QMOPT_SBVERSION) {
874 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
875 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
876 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS)) ==
877 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
878 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
879 XFS_SB_QFLAGS));
880
881 xfs_sb_version_addquota(&mp->m_sb);
882 mp->m_sb.sb_uquotino = NULLFSINO;
883 mp->m_sb.sb_gquotino = NULLFSINO;
884 mp->m_sb.sb_pquotino = NULLFSINO;
885
886 /* qflags will get updated fully _after_ quotacheck */
887 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
888 }
889 if (flags & XFS_QMOPT_UQUOTA)
890 mp->m_sb.sb_uquotino = (*ip)->i_ino;
891 else if (flags & XFS_QMOPT_GQUOTA)
892 mp->m_sb.sb_gquotino = (*ip)->i_ino;
893 else
894 mp->m_sb.sb_pquotino = (*ip)->i_ino;
895 spin_unlock(&mp->m_sb_lock);
896 xfs_mod_sb(tp, sbfields);
897
898 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
899 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
900 return error;
901 }
902 return 0;
903 }
904
905
906 STATIC void
907 xfs_qm_reset_dqcounts(
908 xfs_mount_t *mp,
909 xfs_buf_t *bp,
910 xfs_dqid_t id,
911 uint type)
912 {
913 struct xfs_dqblk *dqb;
914 int j;
915
916 trace_xfs_reset_dqcounts(bp, _RET_IP_);
917
918 /*
919 * Reset all counters and timers. They'll be
920 * started afresh by xfs_qm_quotacheck.
921 */
922 #ifdef DEBUG
923 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
924 do_div(j, sizeof(xfs_dqblk_t));
925 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
926 #endif
927 dqb = bp->b_addr;
928 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
929 struct xfs_disk_dquot *ddq;
930
931 ddq = (struct xfs_disk_dquot *)&dqb[j];
932
933 /*
934 * Do a sanity check, and if needed, repair the dqblk. Don't
935 * output any warnings because it's perfectly possible to
936 * find uninitialised dquot blks. See comment in xfs_dqcheck.
937 */
938 xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
939 "xfs_quotacheck");
940 ddq->d_bcount = 0;
941 ddq->d_icount = 0;
942 ddq->d_rtbcount = 0;
943 ddq->d_btimer = 0;
944 ddq->d_itimer = 0;
945 ddq->d_rtbtimer = 0;
946 ddq->d_bwarns = 0;
947 ddq->d_iwarns = 0;
948 ddq->d_rtbwarns = 0;
949
950 if (xfs_sb_version_hascrc(&mp->m_sb)) {
951 xfs_update_cksum((char *)&dqb[j],
952 sizeof(struct xfs_dqblk),
953 XFS_DQUOT_CRC_OFF);
954 }
955 }
956 }
957
958 STATIC int
959 xfs_qm_dqiter_bufs(
960 struct xfs_mount *mp,
961 xfs_dqid_t firstid,
962 xfs_fsblock_t bno,
963 xfs_filblks_t blkcnt,
964 uint flags,
965 struct list_head *buffer_list)
966 {
967 struct xfs_buf *bp;
968 int error;
969 int type;
970
971 ASSERT(blkcnt > 0);
972 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
973 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
974 error = 0;
975
976 /*
977 * Blkcnt arg can be a very big number, and might even be
978 * larger than the log itself. So, we have to break it up into
979 * manageable-sized transactions.
980 * Note that we don't start a permanent transaction here; we might
981 * not be able to get a log reservation for the whole thing up front,
982 * and we don't really care to either, because we just discard
983 * everything if we were to crash in the middle of this loop.
984 */
985 while (blkcnt--) {
986 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
987 XFS_FSB_TO_DADDR(mp, bno),
988 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
989 &xfs_dquot_buf_ops);
990
991 /*
992 * CRC and validation errors will return a EFSCORRUPTED here. If
993 * this occurs, re-read without CRC validation so that we can
994 * repair the damage via xfs_qm_reset_dqcounts(). This process
995 * will leave a trace in the log indicating corruption has
996 * been detected.
997 */
998 if (error == EFSCORRUPTED) {
999 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1000 XFS_FSB_TO_DADDR(mp, bno),
1001 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1002 NULL);
1003 }
1004
1005 if (error)
1006 break;
1007
1008 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1009 xfs_buf_delwri_queue(bp, buffer_list);
1010 xfs_buf_relse(bp);
1011
1012 /* goto the next block. */
1013 bno++;
1014 firstid += mp->m_quotainfo->qi_dqperchunk;
1015 }
1016
1017 return error;
1018 }
1019
1020 /*
1021 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1022 * caller supplied function for every chunk of dquots that we find.
1023 */
1024 STATIC int
1025 xfs_qm_dqiterate(
1026 struct xfs_mount *mp,
1027 struct xfs_inode *qip,
1028 uint flags,
1029 struct list_head *buffer_list)
1030 {
1031 struct xfs_bmbt_irec *map;
1032 int i, nmaps; /* number of map entries */
1033 int error; /* return value */
1034 xfs_fileoff_t lblkno;
1035 xfs_filblks_t maxlblkcnt;
1036 xfs_dqid_t firstid;
1037 xfs_fsblock_t rablkno;
1038 xfs_filblks_t rablkcnt;
1039
1040 error = 0;
1041 /*
1042 * This looks racy, but we can't keep an inode lock across a
1043 * trans_reserve. But, this gets called during quotacheck, and that
1044 * happens only at mount time which is single threaded.
1045 */
1046 if (qip->i_d.di_nblocks == 0)
1047 return 0;
1048
1049 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1050
1051 lblkno = 0;
1052 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
1053 do {
1054 uint lock_mode;
1055
1056 nmaps = XFS_DQITER_MAP_SIZE;
1057 /*
1058 * We aren't changing the inode itself. Just changing
1059 * some of its data. No new blocks are added here, and
1060 * the inode is never added to the transaction.
1061 */
1062 lock_mode = xfs_ilock_data_map_shared(qip);
1063 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1064 map, &nmaps, 0);
1065 xfs_iunlock(qip, lock_mode);
1066 if (error)
1067 break;
1068
1069 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1070 for (i = 0; i < nmaps; i++) {
1071 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1072 ASSERT(map[i].br_blockcount);
1073
1074
1075 lblkno += map[i].br_blockcount;
1076
1077 if (map[i].br_startblock == HOLESTARTBLOCK)
1078 continue;
1079
1080 firstid = (xfs_dqid_t) map[i].br_startoff *
1081 mp->m_quotainfo->qi_dqperchunk;
1082 /*
1083 * Do a read-ahead on the next extent.
1084 */
1085 if ((i+1 < nmaps) &&
1086 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1087 rablkcnt = map[i+1].br_blockcount;
1088 rablkno = map[i+1].br_startblock;
1089 while (rablkcnt--) {
1090 xfs_buf_readahead(mp->m_ddev_targp,
1091 XFS_FSB_TO_DADDR(mp, rablkno),
1092 mp->m_quotainfo->qi_dqchunklen,
1093 NULL);
1094 rablkno++;
1095 }
1096 }
1097 /*
1098 * Iterate thru all the blks in the extent and
1099 * reset the counters of all the dquots inside them.
1100 */
1101 error = xfs_qm_dqiter_bufs(mp, firstid,
1102 map[i].br_startblock,
1103 map[i].br_blockcount,
1104 flags, buffer_list);
1105 if (error)
1106 goto out;
1107 }
1108 } while (nmaps > 0);
1109
1110 out:
1111 kmem_free(map);
1112 return error;
1113 }
1114
1115 /*
1116 * Called by dqusage_adjust in doing a quotacheck.
1117 *
1118 * Given the inode, and a dquot id this updates both the incore dqout as well
1119 * as the buffer copy. This is so that once the quotacheck is done, we can
1120 * just log all the buffers, as opposed to logging numerous updates to
1121 * individual dquots.
1122 */
1123 STATIC int
1124 xfs_qm_quotacheck_dqadjust(
1125 struct xfs_inode *ip,
1126 xfs_dqid_t id,
1127 uint type,
1128 xfs_qcnt_t nblks,
1129 xfs_qcnt_t rtblks)
1130 {
1131 struct xfs_mount *mp = ip->i_mount;
1132 struct xfs_dquot *dqp;
1133 int error;
1134
1135 error = xfs_qm_dqget(mp, ip, id, type,
1136 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1137 if (error) {
1138 /*
1139 * Shouldn't be able to turn off quotas here.
1140 */
1141 ASSERT(error != ESRCH);
1142 ASSERT(error != ENOENT);
1143 return error;
1144 }
1145
1146 trace_xfs_dqadjust(dqp);
1147
1148 /*
1149 * Adjust the inode count and the block count to reflect this inode's
1150 * resource usage.
1151 */
1152 be64_add_cpu(&dqp->q_core.d_icount, 1);
1153 dqp->q_res_icount++;
1154 if (nblks) {
1155 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1156 dqp->q_res_bcount += nblks;
1157 }
1158 if (rtblks) {
1159 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1160 dqp->q_res_rtbcount += rtblks;
1161 }
1162
1163 /*
1164 * Set default limits, adjust timers (since we changed usages)
1165 *
1166 * There are no timers for the default values set in the root dquot.
1167 */
1168 if (dqp->q_core.d_id) {
1169 xfs_qm_adjust_dqlimits(mp, dqp);
1170 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1171 }
1172
1173 dqp->dq_flags |= XFS_DQ_DIRTY;
1174 xfs_qm_dqput(dqp);
1175 return 0;
1176 }
1177
1178 STATIC int
1179 xfs_qm_get_rtblks(
1180 xfs_inode_t *ip,
1181 xfs_qcnt_t *O_rtblks)
1182 {
1183 xfs_filblks_t rtblks; /* total rt blks */
1184 xfs_extnum_t idx; /* extent record index */
1185 xfs_ifork_t *ifp; /* inode fork pointer */
1186 xfs_extnum_t nextents; /* number of extent entries */
1187 int error;
1188
1189 ASSERT(XFS_IS_REALTIME_INODE(ip));
1190 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1191 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1192 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1193 return error;
1194 }
1195 rtblks = 0;
1196 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1197 for (idx = 0; idx < nextents; idx++)
1198 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1199 *O_rtblks = (xfs_qcnt_t)rtblks;
1200 return 0;
1201 }
1202
1203 /*
1204 * callback routine supplied to bulkstat(). Given an inumber, find its
1205 * dquots and update them to account for resources taken by that inode.
1206 */
1207 /* ARGSUSED */
1208 STATIC int
1209 xfs_qm_dqusage_adjust(
1210 xfs_mount_t *mp, /* mount point for filesystem */
1211 xfs_ino_t ino, /* inode number to get data for */
1212 void __user *buffer, /* not used */
1213 int ubsize, /* not used */
1214 int *ubused, /* not used */
1215 int *res) /* result code value */
1216 {
1217 xfs_inode_t *ip;
1218 xfs_qcnt_t nblks, rtblks = 0;
1219 int error;
1220
1221 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1222
1223 /*
1224 * rootino must have its resources accounted for, not so with the quota
1225 * inodes.
1226 */
1227 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1228 *res = BULKSTAT_RV_NOTHING;
1229 return XFS_ERROR(EINVAL);
1230 }
1231
1232 /*
1233 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1234 * interface expects the inode to be exclusively locked because that's
1235 * the case in all other instances. It's OK that we do this because
1236 * quotacheck is done only at mount time.
1237 */
1238 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1239 if (error) {
1240 *res = BULKSTAT_RV_NOTHING;
1241 return error;
1242 }
1243
1244 ASSERT(ip->i_delayed_blks == 0);
1245
1246 if (XFS_IS_REALTIME_INODE(ip)) {
1247 /*
1248 * Walk thru the extent list and count the realtime blocks.
1249 */
1250 error = xfs_qm_get_rtblks(ip, &rtblks);
1251 if (error)
1252 goto error0;
1253 }
1254
1255 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1256
1257 /*
1258 * Add the (disk blocks and inode) resources occupied by this
1259 * inode to its dquots. We do this adjustment in the incore dquot,
1260 * and also copy the changes to its buffer.
1261 * We don't care about putting these changes in a transaction
1262 * envelope because if we crash in the middle of a 'quotacheck'
1263 * we have to start from the beginning anyway.
1264 * Once we're done, we'll log all the dquot bufs.
1265 *
1266 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1267 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1268 */
1269 if (XFS_IS_UQUOTA_ON(mp)) {
1270 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1271 XFS_DQ_USER, nblks, rtblks);
1272 if (error)
1273 goto error0;
1274 }
1275
1276 if (XFS_IS_GQUOTA_ON(mp)) {
1277 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1278 XFS_DQ_GROUP, nblks, rtblks);
1279 if (error)
1280 goto error0;
1281 }
1282
1283 if (XFS_IS_PQUOTA_ON(mp)) {
1284 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1285 XFS_DQ_PROJ, nblks, rtblks);
1286 if (error)
1287 goto error0;
1288 }
1289
1290 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1291 IRELE(ip);
1292 *res = BULKSTAT_RV_DIDONE;
1293 return 0;
1294
1295 error0:
1296 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1297 IRELE(ip);
1298 *res = BULKSTAT_RV_GIVEUP;
1299 return error;
1300 }
1301
1302 STATIC int
1303 xfs_qm_flush_one(
1304 struct xfs_dquot *dqp,
1305 void *data)
1306 {
1307 struct list_head *buffer_list = data;
1308 struct xfs_buf *bp = NULL;
1309 int error = 0;
1310
1311 xfs_dqlock(dqp);
1312 if (dqp->dq_flags & XFS_DQ_FREEING)
1313 goto out_unlock;
1314 if (!XFS_DQ_IS_DIRTY(dqp))
1315 goto out_unlock;
1316
1317 xfs_dqflock(dqp);
1318 error = xfs_qm_dqflush(dqp, &bp);
1319 if (error)
1320 goto out_unlock;
1321
1322 xfs_buf_delwri_queue(bp, buffer_list);
1323 xfs_buf_relse(bp);
1324 out_unlock:
1325 xfs_dqunlock(dqp);
1326 return error;
1327 }
1328
1329 /*
1330 * Walk thru all the filesystem inodes and construct a consistent view
1331 * of the disk quota world. If the quotacheck fails, disable quotas.
1332 */
1333 int
1334 xfs_qm_quotacheck(
1335 xfs_mount_t *mp)
1336 {
1337 int done, count, error, error2;
1338 xfs_ino_t lastino;
1339 size_t structsz;
1340 uint flags;
1341 LIST_HEAD (buffer_list);
1342 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1343 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1344 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1345
1346 count = INT_MAX;
1347 structsz = 1;
1348 lastino = 0;
1349 flags = 0;
1350
1351 ASSERT(uip || gip || pip);
1352 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1353
1354 xfs_notice(mp, "Quotacheck needed: Please wait.");
1355
1356 /*
1357 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1358 * their counters to zero. We need a clean slate.
1359 * We don't log our changes till later.
1360 */
1361 if (uip) {
1362 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1363 &buffer_list);
1364 if (error)
1365 goto error_return;
1366 flags |= XFS_UQUOTA_CHKD;
1367 }
1368
1369 if (gip) {
1370 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1371 &buffer_list);
1372 if (error)
1373 goto error_return;
1374 flags |= XFS_GQUOTA_CHKD;
1375 }
1376
1377 if (pip) {
1378 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1379 &buffer_list);
1380 if (error)
1381 goto error_return;
1382 flags |= XFS_PQUOTA_CHKD;
1383 }
1384
1385 do {
1386 /*
1387 * Iterate thru all the inodes in the file system,
1388 * adjusting the corresponding dquot counters in core.
1389 */
1390 error = xfs_bulkstat(mp, &lastino, &count,
1391 xfs_qm_dqusage_adjust,
1392 structsz, NULL, &done);
1393 if (error)
1394 break;
1395
1396 } while (!done);
1397
1398 /*
1399 * We've made all the changes that we need to make incore. Flush them
1400 * down to disk buffers if everything was updated successfully.
1401 */
1402 if (XFS_IS_UQUOTA_ON(mp)) {
1403 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1404 &buffer_list);
1405 }
1406 if (XFS_IS_GQUOTA_ON(mp)) {
1407 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1408 &buffer_list);
1409 if (!error)
1410 error = error2;
1411 }
1412 if (XFS_IS_PQUOTA_ON(mp)) {
1413 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1414 &buffer_list);
1415 if (!error)
1416 error = error2;
1417 }
1418
1419 error2 = xfs_buf_delwri_submit(&buffer_list);
1420 if (!error)
1421 error = error2;
1422
1423 /*
1424 * We can get this error if we couldn't do a dquot allocation inside
1425 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1426 * dirty dquots that might be cached, we just want to get rid of them
1427 * and turn quotaoff. The dquots won't be attached to any of the inodes
1428 * at this point (because we intentionally didn't in dqget_noattach).
1429 */
1430 if (error) {
1431 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1432 goto error_return;
1433 }
1434
1435 /*
1436 * If one type of quotas is off, then it will lose its
1437 * quotachecked status, since we won't be doing accounting for
1438 * that type anymore.
1439 */
1440 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1441 mp->m_qflags |= flags;
1442
1443 error_return:
1444 while (!list_empty(&buffer_list)) {
1445 struct xfs_buf *bp =
1446 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1447 list_del_init(&bp->b_list);
1448 xfs_buf_relse(bp);
1449 }
1450
1451 if (error) {
1452 xfs_warn(mp,
1453 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1454 error);
1455 /*
1456 * We must turn off quotas.
1457 */
1458 ASSERT(mp->m_quotainfo != NULL);
1459 xfs_qm_destroy_quotainfo(mp);
1460 if (xfs_mount_reset_sbqflags(mp)) {
1461 xfs_warn(mp,
1462 "Quotacheck: Failed to reset quota flags.");
1463 }
1464 } else
1465 xfs_notice(mp, "Quotacheck: Done.");
1466 return (error);
1467 }
1468
1469 /*
1470 * This is called after the superblock has been read in and we're ready to
1471 * iget the quota inodes.
1472 */
1473 STATIC int
1474 xfs_qm_init_quotainos(
1475 xfs_mount_t *mp)
1476 {
1477 struct xfs_inode *uip = NULL;
1478 struct xfs_inode *gip = NULL;
1479 struct xfs_inode *pip = NULL;
1480 int error;
1481 __int64_t sbflags = 0;
1482 uint flags = 0;
1483
1484 ASSERT(mp->m_quotainfo);
1485
1486 /*
1487 * Get the uquota and gquota inodes
1488 */
1489 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1490 if (XFS_IS_UQUOTA_ON(mp) &&
1491 mp->m_sb.sb_uquotino != NULLFSINO) {
1492 ASSERT(mp->m_sb.sb_uquotino > 0);
1493 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1494 0, 0, &uip);
1495 if (error)
1496 return XFS_ERROR(error);
1497 }
1498 if (XFS_IS_GQUOTA_ON(mp) &&
1499 mp->m_sb.sb_gquotino != NULLFSINO) {
1500 ASSERT(mp->m_sb.sb_gquotino > 0);
1501 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1502 0, 0, &gip);
1503 if (error)
1504 goto error_rele;
1505 }
1506 if (XFS_IS_PQUOTA_ON(mp) &&
1507 mp->m_sb.sb_pquotino != NULLFSINO) {
1508 ASSERT(mp->m_sb.sb_pquotino > 0);
1509 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1510 0, 0, &pip);
1511 if (error)
1512 goto error_rele;
1513 }
1514 } else {
1515 flags |= XFS_QMOPT_SBVERSION;
1516 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1517 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1518 XFS_SB_QFLAGS);
1519 }
1520
1521 /*
1522 * Create the three inodes, if they don't exist already. The changes
1523 * made above will get added to a transaction and logged in one of
1524 * the qino_alloc calls below. If the device is readonly,
1525 * temporarily switch to read-write to do this.
1526 */
1527 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1528 error = xfs_qm_qino_alloc(mp, &uip,
1529 sbflags | XFS_SB_UQUOTINO,
1530 flags | XFS_QMOPT_UQUOTA);
1531 if (error)
1532 goto error_rele;
1533
1534 flags &= ~XFS_QMOPT_SBVERSION;
1535 }
1536 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1537 error = xfs_qm_qino_alloc(mp, &gip,
1538 sbflags | XFS_SB_GQUOTINO,
1539 flags | XFS_QMOPT_GQUOTA);
1540 if (error)
1541 goto error_rele;
1542
1543 flags &= ~XFS_QMOPT_SBVERSION;
1544 }
1545 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1546 error = xfs_qm_qino_alloc(mp, &pip,
1547 sbflags | XFS_SB_PQUOTINO,
1548 flags | XFS_QMOPT_PQUOTA);
1549 if (error)
1550 goto error_rele;
1551 }
1552
1553 mp->m_quotainfo->qi_uquotaip = uip;
1554 mp->m_quotainfo->qi_gquotaip = gip;
1555 mp->m_quotainfo->qi_pquotaip = pip;
1556
1557 return 0;
1558
1559 error_rele:
1560 if (uip)
1561 IRELE(uip);
1562 if (gip)
1563 IRELE(gip);
1564 if (pip)
1565 IRELE(pip);
1566 return XFS_ERROR(error);
1567 }
1568
1569 STATIC void
1570 xfs_qm_dqfree_one(
1571 struct xfs_dquot *dqp)
1572 {
1573 struct xfs_mount *mp = dqp->q_mount;
1574 struct xfs_quotainfo *qi = mp->m_quotainfo;
1575
1576 mutex_lock(&qi->qi_tree_lock);
1577 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1578 be32_to_cpu(dqp->q_core.d_id));
1579
1580 qi->qi_dquots--;
1581 mutex_unlock(&qi->qi_tree_lock);
1582
1583 xfs_qm_dqdestroy(dqp);
1584 }
1585
1586 /*
1587 * Start a transaction and write the incore superblock changes to
1588 * disk. flags parameter indicates which fields have changed.
1589 */
1590 int
1591 xfs_qm_write_sb_changes(
1592 xfs_mount_t *mp,
1593 __int64_t flags)
1594 {
1595 xfs_trans_t *tp;
1596 int error;
1597
1598 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1599 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
1600 if (error) {
1601 xfs_trans_cancel(tp, 0);
1602 return error;
1603 }
1604
1605 xfs_mod_sb(tp, flags);
1606 error = xfs_trans_commit(tp, 0);
1607
1608 return error;
1609 }
1610
1611
1612 /* --------------- utility functions for vnodeops ---------------- */
1613
1614
1615 /*
1616 * Given an inode, a uid, gid and prid make sure that we have
1617 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1618 * quotas by creating this file.
1619 * This also attaches dquot(s) to the given inode after locking it,
1620 * and returns the dquots corresponding to the uid and/or gid.
1621 *
1622 * in : inode (unlocked)
1623 * out : udquot, gdquot with references taken and unlocked
1624 */
1625 int
1626 xfs_qm_vop_dqalloc(
1627 struct xfs_inode *ip,
1628 xfs_dqid_t uid,
1629 xfs_dqid_t gid,
1630 prid_t prid,
1631 uint flags,
1632 struct xfs_dquot **O_udqpp,
1633 struct xfs_dquot **O_gdqpp,
1634 struct xfs_dquot **O_pdqpp)
1635 {
1636 struct xfs_mount *mp = ip->i_mount;
1637 struct xfs_dquot *uq = NULL;
1638 struct xfs_dquot *gq = NULL;
1639 struct xfs_dquot *pq = NULL;
1640 int error;
1641 uint lockflags;
1642
1643 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1644 return 0;
1645
1646 lockflags = XFS_ILOCK_EXCL;
1647 xfs_ilock(ip, lockflags);
1648
1649 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1650 gid = ip->i_d.di_gid;
1651
1652 /*
1653 * Attach the dquot(s) to this inode, doing a dquot allocation
1654 * if necessary. The dquot(s) will not be locked.
1655 */
1656 if (XFS_NOT_DQATTACHED(mp, ip)) {
1657 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1658 if (error) {
1659 xfs_iunlock(ip, lockflags);
1660 return error;
1661 }
1662 }
1663
1664 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1665 if (ip->i_d.di_uid != uid) {
1666 /*
1667 * What we need is the dquot that has this uid, and
1668 * if we send the inode to dqget, the uid of the inode
1669 * takes priority over what's sent in the uid argument.
1670 * We must unlock inode here before calling dqget if
1671 * we're not sending the inode, because otherwise
1672 * we'll deadlock by doing trans_reserve while
1673 * holding ilock.
1674 */
1675 xfs_iunlock(ip, lockflags);
1676 error = xfs_qm_dqget(mp, NULL, uid,
1677 XFS_DQ_USER,
1678 XFS_QMOPT_DQALLOC |
1679 XFS_QMOPT_DOWARN,
1680 &uq);
1681 if (error) {
1682 ASSERT(error != ENOENT);
1683 return error;
1684 }
1685 /*
1686 * Get the ilock in the right order.
1687 */
1688 xfs_dqunlock(uq);
1689 lockflags = XFS_ILOCK_SHARED;
1690 xfs_ilock(ip, lockflags);
1691 } else {
1692 /*
1693 * Take an extra reference, because we'll return
1694 * this to caller
1695 */
1696 ASSERT(ip->i_udquot);
1697 uq = xfs_qm_dqhold(ip->i_udquot);
1698 }
1699 }
1700 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1701 if (ip->i_d.di_gid != gid) {
1702 xfs_iunlock(ip, lockflags);
1703 error = xfs_qm_dqget(mp, NULL, gid,
1704 XFS_DQ_GROUP,
1705 XFS_QMOPT_DQALLOC |
1706 XFS_QMOPT_DOWARN,
1707 &gq);
1708 if (error) {
1709 ASSERT(error != ENOENT);
1710 goto error_rele;
1711 }
1712 xfs_dqunlock(gq);
1713 lockflags = XFS_ILOCK_SHARED;
1714 xfs_ilock(ip, lockflags);
1715 } else {
1716 ASSERT(ip->i_gdquot);
1717 gq = xfs_qm_dqhold(ip->i_gdquot);
1718 }
1719 }
1720 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1721 if (xfs_get_projid(ip) != prid) {
1722 xfs_iunlock(ip, lockflags);
1723 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1724 XFS_DQ_PROJ,
1725 XFS_QMOPT_DQALLOC |
1726 XFS_QMOPT_DOWARN,
1727 &pq);
1728 if (error) {
1729 ASSERT(error != ENOENT);
1730 goto error_rele;
1731 }
1732 xfs_dqunlock(pq);
1733 lockflags = XFS_ILOCK_SHARED;
1734 xfs_ilock(ip, lockflags);
1735 } else {
1736 ASSERT(ip->i_pdquot);
1737 pq = xfs_qm_dqhold(ip->i_pdquot);
1738 }
1739 }
1740 if (uq)
1741 trace_xfs_dquot_dqalloc(ip);
1742
1743 xfs_iunlock(ip, lockflags);
1744 if (O_udqpp)
1745 *O_udqpp = uq;
1746 else if (uq)
1747 xfs_qm_dqrele(uq);
1748 if (O_gdqpp)
1749 *O_gdqpp = gq;
1750 else if (gq)
1751 xfs_qm_dqrele(gq);
1752 if (O_pdqpp)
1753 *O_pdqpp = pq;
1754 else if (pq)
1755 xfs_qm_dqrele(pq);
1756 return 0;
1757
1758 error_rele:
1759 if (gq)
1760 xfs_qm_dqrele(gq);
1761 if (uq)
1762 xfs_qm_dqrele(uq);
1763 return error;
1764 }
1765
1766 /*
1767 * Actually transfer ownership, and do dquot modifications.
1768 * These were already reserved.
1769 */
1770 xfs_dquot_t *
1771 xfs_qm_vop_chown(
1772 xfs_trans_t *tp,
1773 xfs_inode_t *ip,
1774 xfs_dquot_t **IO_olddq,
1775 xfs_dquot_t *newdq)
1776 {
1777 xfs_dquot_t *prevdq;
1778 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1779 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1780
1781
1782 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1783 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1784
1785 /* old dquot */
1786 prevdq = *IO_olddq;
1787 ASSERT(prevdq);
1788 ASSERT(prevdq != newdq);
1789
1790 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1791 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1792
1793 /* the sparkling new dquot */
1794 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1795 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1796
1797 /*
1798 * Take an extra reference, because the inode is going to keep
1799 * this dquot pointer even after the trans_commit.
1800 */
1801 *IO_olddq = xfs_qm_dqhold(newdq);
1802
1803 return prevdq;
1804 }
1805
1806 /*
1807 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1808 */
1809 int
1810 xfs_qm_vop_chown_reserve(
1811 struct xfs_trans *tp,
1812 struct xfs_inode *ip,
1813 struct xfs_dquot *udqp,
1814 struct xfs_dquot *gdqp,
1815 struct xfs_dquot *pdqp,
1816 uint flags)
1817 {
1818 struct xfs_mount *mp = ip->i_mount;
1819 uint delblks, blkflags, prjflags = 0;
1820 struct xfs_dquot *udq_unres = NULL;
1821 struct xfs_dquot *gdq_unres = NULL;
1822 struct xfs_dquot *pdq_unres = NULL;
1823 struct xfs_dquot *udq_delblks = NULL;
1824 struct xfs_dquot *gdq_delblks = NULL;
1825 struct xfs_dquot *pdq_delblks = NULL;
1826 int error;
1827
1828
1829 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1830 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1831
1832 delblks = ip->i_delayed_blks;
1833 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1834 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1835
1836 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1837 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
1838 udq_delblks = udqp;
1839 /*
1840 * If there are delayed allocation blocks, then we have to
1841 * unreserve those from the old dquot, and add them to the
1842 * new dquot.
1843 */
1844 if (delblks) {
1845 ASSERT(ip->i_udquot);
1846 udq_unres = ip->i_udquot;
1847 }
1848 }
1849 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1850 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1851 gdq_delblks = gdqp;
1852 if (delblks) {
1853 ASSERT(ip->i_gdquot);
1854 gdq_unres = ip->i_gdquot;
1855 }
1856 }
1857
1858 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1859 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
1860 prjflags = XFS_QMOPT_ENOSPC;
1861 pdq_delblks = pdqp;
1862 if (delblks) {
1863 ASSERT(ip->i_pdquot);
1864 pdq_unres = ip->i_pdquot;
1865 }
1866 }
1867
1868 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1869 udq_delblks, gdq_delblks, pdq_delblks,
1870 ip->i_d.di_nblocks, 1,
1871 flags | blkflags | prjflags);
1872 if (error)
1873 return error;
1874
1875 /*
1876 * Do the delayed blks reservations/unreservations now. Since, these
1877 * are done without the help of a transaction, if a reservation fails
1878 * its previous reservations won't be automatically undone by trans
1879 * code. So, we have to do it manually here.
1880 */
1881 if (delblks) {
1882 /*
1883 * Do the reservations first. Unreservation can't fail.
1884 */
1885 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
1886 ASSERT(udq_unres || gdq_unres || pdq_unres);
1887 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1888 udq_delblks, gdq_delblks, pdq_delblks,
1889 (xfs_qcnt_t)delblks, 0,
1890 flags | blkflags | prjflags);
1891 if (error)
1892 return error;
1893 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1894 udq_unres, gdq_unres, pdq_unres,
1895 -((xfs_qcnt_t)delblks), 0, blkflags);
1896 }
1897
1898 return (0);
1899 }
1900
1901 int
1902 xfs_qm_vop_rename_dqattach(
1903 struct xfs_inode **i_tab)
1904 {
1905 struct xfs_mount *mp = i_tab[0]->i_mount;
1906 int i;
1907
1908 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1909 return 0;
1910
1911 for (i = 0; (i < 4 && i_tab[i]); i++) {
1912 struct xfs_inode *ip = i_tab[i];
1913 int error;
1914
1915 /*
1916 * Watch out for duplicate entries in the table.
1917 */
1918 if (i == 0 || ip != i_tab[i-1]) {
1919 if (XFS_NOT_DQATTACHED(mp, ip)) {
1920 error = xfs_qm_dqattach(ip, 0);
1921 if (error)
1922 return error;
1923 }
1924 }
1925 }
1926 return 0;
1927 }
1928
1929 void
1930 xfs_qm_vop_create_dqattach(
1931 struct xfs_trans *tp,
1932 struct xfs_inode *ip,
1933 struct xfs_dquot *udqp,
1934 struct xfs_dquot *gdqp,
1935 struct xfs_dquot *pdqp)
1936 {
1937 struct xfs_mount *mp = tp->t_mountp;
1938
1939 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1940 return;
1941
1942 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1943 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1944
1945 if (udqp && XFS_IS_UQUOTA_ON(mp)) {
1946 ASSERT(ip->i_udquot == NULL);
1947 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
1948
1949 ip->i_udquot = xfs_qm_dqhold(udqp);
1950 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1951 }
1952 if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
1953 ASSERT(ip->i_gdquot == NULL);
1954 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
1955 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1956 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1957 }
1958 if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
1959 ASSERT(ip->i_pdquot == NULL);
1960 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
1961
1962 ip->i_pdquot = xfs_qm_dqhold(pdqp);
1963 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
1964 }
1965 }
1966
Linux kernel - Deliverables
This page took 0.074398 seconds and 6 git commands to generate.