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_bmap_util.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
42 /*
43 * The global quota manager. There is only one of these for the entire
44 * system, _not_ one per file system. XQM keeps track of the overall
45 * quota functionality, including maintaining the freelist and hash
46 * tables of dquots.
47 */
48 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
49 STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
50
51 STATIC void xfs_qm_destroy_quotainos(xfs_quotainfo_t *qi);
52 STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
53 /*
54 * We use the batch lookup interface to iterate over the dquots as it
55 * currently is the only interface into the radix tree code that allows
56 * fuzzy lookups instead of exact matches. Holding the lock over multiple
57 * operations is fine as all callers are used either during mount/umount
58 * or quotaoff.
59 */
60 #define XFS_DQ_LOOKUP_BATCH 32
61
62 STATIC int
xfs_qm_dquot_walk(struct xfs_mount * mp,int type,int (* execute)(struct xfs_dquot * dqp,void * data),void * data)63 xfs_qm_dquot_walk(
64 struct xfs_mount *mp,
65 int type,
66 int (*execute)(struct xfs_dquot *dqp, void *data),
67 void *data)
68 {
69 struct xfs_quotainfo *qi = mp->m_quotainfo;
70 struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
71 uint32_t next_index;
72 int last_error = 0;
73 int skipped;
74 int nr_found;
75
76 restart:
77 skipped = 0;
78 next_index = 0;
79 nr_found = 0;
80
81 while (1) {
82 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
83 int error = 0;
84 int i;
85
86 mutex_lock(&qi->qi_tree_lock);
87 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
88 next_index, XFS_DQ_LOOKUP_BATCH);
89 if (!nr_found) {
90 mutex_unlock(&qi->qi_tree_lock);
91 break;
92 }
93
94 for (i = 0; i < nr_found; i++) {
95 struct xfs_dquot *dqp = batch[i];
96
97 next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
98
99 error = execute(batch[i], data);
100 if (error == -EAGAIN) {
101 skipped++;
102 continue;
103 }
104 if (error && last_error != -EFSCORRUPTED)
105 last_error = error;
106 }
107
108 mutex_unlock(&qi->qi_tree_lock);
109
110 /* bail out if the filesystem is corrupted. */
111 if (last_error == -EFSCORRUPTED) {
112 skipped = 0;
113 break;
114 }
115 /* we're done if id overflows back to zero */
116 if (!next_index)
117 break;
118 }
119
120 if (skipped) {
121 delay(1);
122 goto restart;
123 }
124
125 return last_error;
126 }
127
128
129 /*
130 * Purge a dquot from all tracking data structures and free it.
131 */
132 STATIC int
xfs_qm_dqpurge(struct xfs_dquot * dqp,void * data)133 xfs_qm_dqpurge(
134 struct xfs_dquot *dqp,
135 void *data)
136 {
137 struct xfs_mount *mp = dqp->q_mount;
138 struct xfs_quotainfo *qi = mp->m_quotainfo;
139
140 xfs_dqlock(dqp);
141 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
142 xfs_dqunlock(dqp);
143 return -EAGAIN;
144 }
145
146 dqp->dq_flags |= XFS_DQ_FREEING;
147
148 xfs_dqflock(dqp);
149
150 /*
151 * If we are turning this type of quotas off, we don't care
152 * about the dirty metadata sitting in this dquot. OTOH, if
153 * we're unmounting, we do care, so we flush it and wait.
154 */
155 if (XFS_DQ_IS_DIRTY(dqp)) {
156 struct xfs_buf *bp = NULL;
157 int error;
158
159 /*
160 * We don't care about getting disk errors here. We need
161 * to purge this dquot anyway, so we go ahead regardless.
162 */
163 error = xfs_qm_dqflush(dqp, &bp);
164 if (error) {
165 xfs_warn(mp, "%s: dquot %p flush failed",
166 __func__, dqp);
167 } else {
168 error = xfs_bwrite(bp);
169 xfs_buf_relse(bp);
170 }
171 xfs_dqflock(dqp);
172 }
173
174 ASSERT(atomic_read(&dqp->q_pincount) == 0);
175 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
176 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
177
178 xfs_dqfunlock(dqp);
179 xfs_dqunlock(dqp);
180
181 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
182 be32_to_cpu(dqp->q_core.d_id));
183 qi->qi_dquots--;
184
185 /*
186 * We move dquots to the freelist as soon as their reference count
187 * hits zero, so it really should be on the freelist here.
188 */
189 ASSERT(!list_empty(&dqp->q_lru));
190 list_lru_del(&qi->qi_lru, &dqp->q_lru);
191 XFS_STATS_DEC(mp, xs_qm_dquot_unused);
192
193 xfs_qm_dqdestroy(dqp);
194 return 0;
195 }
196
197 /*
198 * Purge the dquot cache.
199 */
200 void
xfs_qm_dqpurge_all(struct xfs_mount * mp,uint flags)201 xfs_qm_dqpurge_all(
202 struct xfs_mount *mp,
203 uint flags)
204 {
205 if (flags & XFS_QMOPT_UQUOTA)
206 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
207 if (flags & XFS_QMOPT_GQUOTA)
208 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
209 if (flags & XFS_QMOPT_PQUOTA)
210 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
211 }
212
213 /*
214 * Just destroy the quotainfo structure.
215 */
216 void
xfs_qm_unmount(struct xfs_mount * mp)217 xfs_qm_unmount(
218 struct xfs_mount *mp)
219 {
220 if (mp->m_quotainfo) {
221 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
222 xfs_qm_destroy_quotainfo(mp);
223 }
224 }
225
226 /*
227 * Called from the vfsops layer.
228 */
229 void
xfs_qm_unmount_quotas(xfs_mount_t * mp)230 xfs_qm_unmount_quotas(
231 xfs_mount_t *mp)
232 {
233 /*
234 * Release the dquots that root inode, et al might be holding,
235 * before we flush quotas and blow away the quotainfo structure.
236 */
237 ASSERT(mp->m_rootip);
238 xfs_qm_dqdetach(mp->m_rootip);
239 if (mp->m_rbmip)
240 xfs_qm_dqdetach(mp->m_rbmip);
241 if (mp->m_rsumip)
242 xfs_qm_dqdetach(mp->m_rsumip);
243
244 /*
245 * Release the quota inodes.
246 */
247 if (mp->m_quotainfo) {
248 if (mp->m_quotainfo->qi_uquotaip) {
249 IRELE(mp->m_quotainfo->qi_uquotaip);
250 mp->m_quotainfo->qi_uquotaip = NULL;
251 }
252 if (mp->m_quotainfo->qi_gquotaip) {
253 IRELE(mp->m_quotainfo->qi_gquotaip);
254 mp->m_quotainfo->qi_gquotaip = NULL;
255 }
256 if (mp->m_quotainfo->qi_pquotaip) {
257 IRELE(mp->m_quotainfo->qi_pquotaip);
258 mp->m_quotainfo->qi_pquotaip = NULL;
259 }
260 }
261 }
262
263 STATIC int
xfs_qm_dqattach_one(xfs_inode_t * ip,xfs_dqid_t id,uint type,uint doalloc,xfs_dquot_t ** IO_idqpp)264 xfs_qm_dqattach_one(
265 xfs_inode_t *ip,
266 xfs_dqid_t id,
267 uint type,
268 uint doalloc,
269 xfs_dquot_t **IO_idqpp)
270 {
271 xfs_dquot_t *dqp;
272 int error;
273
274 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
275 error = 0;
276
277 /*
278 * See if we already have it in the inode itself. IO_idqpp is &i_udquot
279 * or &i_gdquot. This made the code look weird, but made the logic a lot
280 * simpler.
281 */
282 dqp = *IO_idqpp;
283 if (dqp) {
284 trace_xfs_dqattach_found(dqp);
285 return 0;
286 }
287
288 /*
289 * Find the dquot from somewhere. This bumps the reference count of
290 * dquot and returns it locked. This can return ENOENT if dquot didn't
291 * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
292 * turned off suddenly.
293 */
294 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
295 doalloc | XFS_QMOPT_DOWARN, &dqp);
296 if (error)
297 return error;
298
299 trace_xfs_dqattach_get(dqp);
300
301 /*
302 * dqget may have dropped and re-acquired the ilock, but it guarantees
303 * that the dquot returned is the one that should go in the inode.
304 */
305 *IO_idqpp = dqp;
306 xfs_dqunlock(dqp);
307 return 0;
308 }
309
310 static bool
xfs_qm_need_dqattach(struct xfs_inode * ip)311 xfs_qm_need_dqattach(
312 struct xfs_inode *ip)
313 {
314 struct xfs_mount *mp = ip->i_mount;
315
316 if (!XFS_IS_QUOTA_RUNNING(mp))
317 return false;
318 if (!XFS_IS_QUOTA_ON(mp))
319 return false;
320 if (!XFS_NOT_DQATTACHED(mp, ip))
321 return false;
322 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
323 return false;
324 return true;
325 }
326
327 /*
328 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
329 * into account.
330 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
331 * Inode may get unlocked and relocked in here, and the caller must deal with
332 * the consequences.
333 */
334 int
xfs_qm_dqattach_locked(xfs_inode_t * ip,uint flags)335 xfs_qm_dqattach_locked(
336 xfs_inode_t *ip,
337 uint flags)
338 {
339 xfs_mount_t *mp = ip->i_mount;
340 int error = 0;
341
342 if (!xfs_qm_need_dqattach(ip))
343 return 0;
344
345 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
346
347 if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
348 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
349 flags & XFS_QMOPT_DQALLOC,
350 &ip->i_udquot);
351 if (error)
352 goto done;
353 ASSERT(ip->i_udquot);
354 }
355
356 if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
357 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
358 flags & XFS_QMOPT_DQALLOC,
359 &ip->i_gdquot);
360 if (error)
361 goto done;
362 ASSERT(ip->i_gdquot);
363 }
364
365 if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
366 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
367 flags & XFS_QMOPT_DQALLOC,
368 &ip->i_pdquot);
369 if (error)
370 goto done;
371 ASSERT(ip->i_pdquot);
372 }
373
374 done:
375 /*
376 * Don't worry about the dquots that we may have attached before any
377 * error - they'll get detached later if it has not already been done.
378 */
379 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
380 return error;
381 }
382
383 int
xfs_qm_dqattach(struct xfs_inode * ip,uint flags)384 xfs_qm_dqattach(
385 struct xfs_inode *ip,
386 uint flags)
387 {
388 int error;
389
390 if (!xfs_qm_need_dqattach(ip))
391 return 0;
392
393 xfs_ilock(ip, XFS_ILOCK_EXCL);
394 error = xfs_qm_dqattach_locked(ip, flags);
395 xfs_iunlock(ip, XFS_ILOCK_EXCL);
396
397 return error;
398 }
399
400 /*
401 * Release dquots (and their references) if any.
402 * The inode should be locked EXCL except when this's called by
403 * xfs_ireclaim.
404 */
405 void
xfs_qm_dqdetach(xfs_inode_t * ip)406 xfs_qm_dqdetach(
407 xfs_inode_t *ip)
408 {
409 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
410 return;
411
412 trace_xfs_dquot_dqdetach(ip);
413
414 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
415 if (ip->i_udquot) {
416 xfs_qm_dqrele(ip->i_udquot);
417 ip->i_udquot = NULL;
418 }
419 if (ip->i_gdquot) {
420 xfs_qm_dqrele(ip->i_gdquot);
421 ip->i_gdquot = NULL;
422 }
423 if (ip->i_pdquot) {
424 xfs_qm_dqrele(ip->i_pdquot);
425 ip->i_pdquot = NULL;
426 }
427 }
428
429 struct xfs_qm_isolate {
430 struct list_head buffers;
431 struct list_head dispose;
432 };
433
434 static enum lru_status
xfs_qm_dquot_isolate(struct list_head * item,struct list_lru_one * lru,spinlock_t * lru_lock,void * arg)435 xfs_qm_dquot_isolate(
436 struct list_head *item,
437 struct list_lru_one *lru,
438 spinlock_t *lru_lock,
439 void *arg)
440 __releases(lru_lock) __acquires(lru_lock)
441 {
442 struct xfs_dquot *dqp = container_of(item,
443 struct xfs_dquot, q_lru);
444 struct xfs_qm_isolate *isol = arg;
445
446 if (!xfs_dqlock_nowait(dqp))
447 goto out_miss_busy;
448
449 /*
450 * This dquot has acquired a reference in the meantime remove it from
451 * the freelist and try again.
452 */
453 if (dqp->q_nrefs) {
454 xfs_dqunlock(dqp);
455 XFS_STATS_INC(dqp->q_mount, xs_qm_dqwants);
456
457 trace_xfs_dqreclaim_want(dqp);
458 list_lru_isolate(lru, &dqp->q_lru);
459 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
460 return LRU_REMOVED;
461 }
462
463 /*
464 * If the dquot is dirty, flush it. If it's already being flushed, just
465 * skip it so there is time for the IO to complete before we try to
466 * reclaim it again on the next LRU pass.
467 */
468 if (!xfs_dqflock_nowait(dqp)) {
469 xfs_dqunlock(dqp);
470 goto out_miss_busy;
471 }
472
473 if (XFS_DQ_IS_DIRTY(dqp)) {
474 struct xfs_buf *bp = NULL;
475 int error;
476
477 trace_xfs_dqreclaim_dirty(dqp);
478
479 /* we have to drop the LRU lock to flush the dquot */
480 spin_unlock(lru_lock);
481
482 error = xfs_qm_dqflush(dqp, &bp);
483 if (error) {
484 xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
485 __func__, dqp);
486 goto out_unlock_dirty;
487 }
488
489 xfs_buf_delwri_queue(bp, &isol->buffers);
490 xfs_buf_relse(bp);
491 goto out_unlock_dirty;
492 }
493 xfs_dqfunlock(dqp);
494
495 /*
496 * Prevent lookups now that we are past the point of no return.
497 */
498 dqp->dq_flags |= XFS_DQ_FREEING;
499 xfs_dqunlock(dqp);
500
501 ASSERT(dqp->q_nrefs == 0);
502 list_lru_isolate_move(lru, &dqp->q_lru, &isol->dispose);
503 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
504 trace_xfs_dqreclaim_done(dqp);
505 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaims);
506 return LRU_REMOVED;
507
508 out_miss_busy:
509 trace_xfs_dqreclaim_busy(dqp);
510 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
511 return LRU_SKIP;
512
513 out_unlock_dirty:
514 trace_xfs_dqreclaim_busy(dqp);
515 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
516 xfs_dqunlock(dqp);
517 spin_lock(lru_lock);
518 return LRU_RETRY;
519 }
520
521 static unsigned long
xfs_qm_shrink_scan(struct shrinker * shrink,struct shrink_control * sc)522 xfs_qm_shrink_scan(
523 struct shrinker *shrink,
524 struct shrink_control *sc)
525 {
526 struct xfs_quotainfo *qi = container_of(shrink,
527 struct xfs_quotainfo, qi_shrinker);
528 struct xfs_qm_isolate isol;
529 unsigned long freed;
530 int error;
531
532 if ((sc->gfp_mask & (__GFP_FS|__GFP_DIRECT_RECLAIM)) != (__GFP_FS|__GFP_DIRECT_RECLAIM))
533 return 0;
534
535 INIT_LIST_HEAD(&isol.buffers);
536 INIT_LIST_HEAD(&isol.dispose);
537
538 freed = list_lru_shrink_walk(&qi->qi_lru, sc,
539 xfs_qm_dquot_isolate, &isol);
540
541 error = xfs_buf_delwri_submit(&isol.buffers);
542 if (error)
543 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
544
545 while (!list_empty(&isol.dispose)) {
546 struct xfs_dquot *dqp;
547
548 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
549 list_del_init(&dqp->q_lru);
550 xfs_qm_dqfree_one(dqp);
551 }
552
553 return freed;
554 }
555
556 static unsigned long
xfs_qm_shrink_count(struct shrinker * shrink,struct shrink_control * sc)557 xfs_qm_shrink_count(
558 struct shrinker *shrink,
559 struct shrink_control *sc)
560 {
561 struct xfs_quotainfo *qi = container_of(shrink,
562 struct xfs_quotainfo, qi_shrinker);
563
564 return list_lru_shrink_count(&qi->qi_lru, sc);
565 }
566
567 STATIC void
xfs_qm_set_defquota(xfs_mount_t * mp,uint type,xfs_quotainfo_t * qinf)568 xfs_qm_set_defquota(
569 xfs_mount_t *mp,
570 uint type,
571 xfs_quotainfo_t *qinf)
572 {
573 xfs_dquot_t *dqp;
574 struct xfs_def_quota *defq;
575 int error;
576
577 error = xfs_qm_dqread(mp, 0, type, XFS_QMOPT_DOWARN, &dqp);
578
579 if (!error) {
580 xfs_disk_dquot_t *ddqp = &dqp->q_core;
581
582 defq = xfs_get_defquota(dqp, qinf);
583
584 /*
585 * Timers and warnings have been already set, let's just set the
586 * default limits for this quota type
587 */
588 defq->bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
589 defq->bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
590 defq->ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
591 defq->isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
592 defq->rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
593 defq->rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
594 xfs_qm_dqdestroy(dqp);
595 }
596 }
597
598 /*
599 * This initializes all the quota information that's kept in the
600 * mount structure
601 */
602 STATIC int
xfs_qm_init_quotainfo(xfs_mount_t * mp)603 xfs_qm_init_quotainfo(
604 xfs_mount_t *mp)
605 {
606 xfs_quotainfo_t *qinf;
607 int error;
608 xfs_dquot_t *dqp;
609
610 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
611
612 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
613
614 error = list_lru_init(&qinf->qi_lru);
615 if (error)
616 goto out_free_qinf;
617
618 /*
619 * See if quotainodes are setup, and if not, allocate them,
620 * and change the superblock accordingly.
621 */
622 error = xfs_qm_init_quotainos(mp);
623 if (error)
624 goto out_free_lru;
625
626 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
627 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
628 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
629 mutex_init(&qinf->qi_tree_lock);
630
631 /* mutex used to serialize quotaoffs */
632 mutex_init(&qinf->qi_quotaofflock);
633
634 /* Precalc some constants */
635 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
636 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
637
638 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
639
640 /*
641 * We try to get the limits from the superuser's limits fields.
642 * This is quite hacky, but it is standard quota practice.
643 *
644 * Since we may not have done a quotacheck by this point, just read
645 * the dquot without attaching it to any hashtables or lists.
646 *
647 * Timers and warnings are globally set by the first timer found in
648 * user/group/proj quota types, otherwise a default value is used.
649 * This should be split into different fields per quota type.
650 */
651 error = xfs_qm_dqread(mp, 0,
652 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
653 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
654 XFS_DQ_PROJ),
655 XFS_QMOPT_DOWARN, &dqp);
656
657 if (!error) {
658 xfs_disk_dquot_t *ddqp = &dqp->q_core;
659
660 /*
661 * The warnings and timers set the grace period given to
662 * a user or group before he or she can not perform any
663 * more writing. If it is zero, a default is used.
664 */
665 qinf->qi_btimelimit = ddqp->d_btimer ?
666 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
667 qinf->qi_itimelimit = ddqp->d_itimer ?
668 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
669 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
670 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
671 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
672 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
673 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
674 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
675 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
676 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
677 xfs_qm_dqdestroy(dqp);
678 } else {
679 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
680 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
681 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
682 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
683 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
684 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
685 }
686
687 if (XFS_IS_UQUOTA_RUNNING(mp))
688 xfs_qm_set_defquota(mp, XFS_DQ_USER, qinf);
689 if (XFS_IS_GQUOTA_RUNNING(mp))
690 xfs_qm_set_defquota(mp, XFS_DQ_GROUP, qinf);
691 if (XFS_IS_PQUOTA_RUNNING(mp))
692 xfs_qm_set_defquota(mp, XFS_DQ_PROJ, qinf);
693
694 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
695 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
696 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
697 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
698
699 error = register_shrinker(&qinf->qi_shrinker);
700 if (error)
701 goto out_free_inos;
702
703 return 0;
704
705 out_free_inos:
706 mutex_destroy(&qinf->qi_quotaofflock);
707 mutex_destroy(&qinf->qi_tree_lock);
708 xfs_qm_destroy_quotainos(qinf);
709 out_free_lru:
710 list_lru_destroy(&qinf->qi_lru);
711 out_free_qinf:
712 kmem_free(qinf);
713 mp->m_quotainfo = NULL;
714 return error;
715 }
716
717 /*
718 * Gets called when unmounting a filesystem or when all quotas get
719 * turned off.
720 * This purges the quota inodes, destroys locks and frees itself.
721 */
722 void
xfs_qm_destroy_quotainfo(xfs_mount_t * mp)723 xfs_qm_destroy_quotainfo(
724 xfs_mount_t *mp)
725 {
726 xfs_quotainfo_t *qi;
727
728 qi = mp->m_quotainfo;
729 ASSERT(qi != NULL);
730
731 unregister_shrinker(&qi->qi_shrinker);
732 list_lru_destroy(&qi->qi_lru);
733 xfs_qm_destroy_quotainos(qi);
734 mutex_destroy(&qi->qi_tree_lock);
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
xfs_qm_qino_alloc(xfs_mount_t * mp,xfs_inode_t ** ip,uint flags)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 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_create,
787 XFS_QM_QINOCREATE_SPACE_RES(mp), 0, 0, &tp);
788 if (error)
789 return error;
790
791 if (need_alloc) {
792 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
793 &committed);
794 if (error) {
795 xfs_trans_cancel(tp);
796 return error;
797 }
798 }
799
800 /*
801 * Make the changes in the superblock, and log those too.
802 * sbfields arg may contain fields other than *QUOTINO;
803 * VERSIONNUM for example.
804 */
805 spin_lock(&mp->m_sb_lock);
806 if (flags & XFS_QMOPT_SBVERSION) {
807 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
808
809 xfs_sb_version_addquota(&mp->m_sb);
810 mp->m_sb.sb_uquotino = NULLFSINO;
811 mp->m_sb.sb_gquotino = NULLFSINO;
812 mp->m_sb.sb_pquotino = NULLFSINO;
813
814 /* qflags will get updated fully _after_ quotacheck */
815 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
816 }
817 if (flags & XFS_QMOPT_UQUOTA)
818 mp->m_sb.sb_uquotino = (*ip)->i_ino;
819 else if (flags & XFS_QMOPT_GQUOTA)
820 mp->m_sb.sb_gquotino = (*ip)->i_ino;
821 else
822 mp->m_sb.sb_pquotino = (*ip)->i_ino;
823 spin_unlock(&mp->m_sb_lock);
824 xfs_log_sb(tp);
825
826 error = xfs_trans_commit(tp);
827 if (error) {
828 ASSERT(XFS_FORCED_SHUTDOWN(mp));
829 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
830 }
831 if (need_alloc)
832 xfs_finish_inode_setup(*ip);
833 return error;
834 }
835
836
837 STATIC void
xfs_qm_reset_dqcounts(xfs_mount_t * mp,xfs_buf_t * bp,xfs_dqid_t id,uint type)838 xfs_qm_reset_dqcounts(
839 xfs_mount_t *mp,
840 xfs_buf_t *bp,
841 xfs_dqid_t id,
842 uint type)
843 {
844 struct xfs_dqblk *dqb;
845 int j;
846
847 trace_xfs_reset_dqcounts(bp, _RET_IP_);
848
849 /*
850 * Reset all counters and timers. They'll be
851 * started afresh by xfs_qm_quotacheck.
852 */
853 #ifdef DEBUG
854 j = (int)XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) /
855 sizeof(xfs_dqblk_t);
856 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
857 #endif
858 dqb = bp->b_addr;
859 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
860 struct xfs_disk_dquot *ddq;
861
862 ddq = (struct xfs_disk_dquot *)&dqb[j];
863
864 /*
865 * Do a sanity check, and if needed, repair the dqblk. Don't
866 * output any warnings because it's perfectly possible to
867 * find uninitialised dquot blks. See comment in xfs_dqcheck.
868 */
869 xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
870 "xfs_quotacheck");
871 /*
872 * Reset type in case we are reusing group quota file for
873 * project quotas or vice versa
874 */
875 ddq->d_flags = type;
876 ddq->d_bcount = 0;
877 ddq->d_icount = 0;
878 ddq->d_rtbcount = 0;
879 ddq->d_btimer = 0;
880 ddq->d_itimer = 0;
881 ddq->d_rtbtimer = 0;
882 ddq->d_bwarns = 0;
883 ddq->d_iwarns = 0;
884 ddq->d_rtbwarns = 0;
885
886 if (xfs_sb_version_hascrc(&mp->m_sb)) {
887 xfs_update_cksum((char *)&dqb[j],
888 sizeof(struct xfs_dqblk),
889 XFS_DQUOT_CRC_OFF);
890 }
891 }
892 }
893
894 STATIC int
xfs_qm_dqiter_bufs(struct xfs_mount * mp,xfs_dqid_t firstid,xfs_fsblock_t bno,xfs_filblks_t blkcnt,uint flags,struct list_head * buffer_list)895 xfs_qm_dqiter_bufs(
896 struct xfs_mount *mp,
897 xfs_dqid_t firstid,
898 xfs_fsblock_t bno,
899 xfs_filblks_t blkcnt,
900 uint flags,
901 struct list_head *buffer_list)
902 {
903 struct xfs_buf *bp;
904 int error;
905 int type;
906
907 ASSERT(blkcnt > 0);
908 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
909 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
910 error = 0;
911
912 /*
913 * Blkcnt arg can be a very big number, and might even be
914 * larger than the log itself. So, we have to break it up into
915 * manageable-sized transactions.
916 * Note that we don't start a permanent transaction here; we might
917 * not be able to get a log reservation for the whole thing up front,
918 * and we don't really care to either, because we just discard
919 * everything if we were to crash in the middle of this loop.
920 */
921 while (blkcnt--) {
922 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
923 XFS_FSB_TO_DADDR(mp, bno),
924 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
925 &xfs_dquot_buf_ops);
926
927 /*
928 * CRC and validation errors will return a EFSCORRUPTED here. If
929 * this occurs, re-read without CRC validation so that we can
930 * repair the damage via xfs_qm_reset_dqcounts(). This process
931 * will leave a trace in the log indicating corruption has
932 * been detected.
933 */
934 if (error == -EFSCORRUPTED) {
935 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
936 XFS_FSB_TO_DADDR(mp, bno),
937 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
938 NULL);
939 }
940
941 if (error)
942 break;
943
944 /*
945 * A corrupt buffer might not have a verifier attached, so
946 * make sure we have the correct one attached before writeback
947 * occurs.
948 */
949 bp->b_ops = &xfs_dquot_buf_ops;
950 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
951 xfs_buf_delwri_queue(bp, buffer_list);
952 xfs_buf_relse(bp);
953
954 /* goto the next block. */
955 bno++;
956 firstid += mp->m_quotainfo->qi_dqperchunk;
957 }
958
959 return error;
960 }
961
962 /*
963 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
964 * caller supplied function for every chunk of dquots that we find.
965 */
966 STATIC int
xfs_qm_dqiterate(struct xfs_mount * mp,struct xfs_inode * qip,uint flags,struct list_head * buffer_list)967 xfs_qm_dqiterate(
968 struct xfs_mount *mp,
969 struct xfs_inode *qip,
970 uint flags,
971 struct list_head *buffer_list)
972 {
973 struct xfs_bmbt_irec *map;
974 int i, nmaps; /* number of map entries */
975 int error; /* return value */
976 xfs_fileoff_t lblkno;
977 xfs_filblks_t maxlblkcnt;
978 xfs_dqid_t firstid;
979 xfs_fsblock_t rablkno;
980 xfs_filblks_t rablkcnt;
981
982 error = 0;
983 /*
984 * This looks racy, but we can't keep an inode lock across a
985 * trans_reserve. But, this gets called during quotacheck, and that
986 * happens only at mount time which is single threaded.
987 */
988 if (qip->i_d.di_nblocks == 0)
989 return 0;
990
991 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
992
993 lblkno = 0;
994 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
995 do {
996 uint lock_mode;
997
998 nmaps = XFS_DQITER_MAP_SIZE;
999 /*
1000 * We aren't changing the inode itself. Just changing
1001 * some of its data. No new blocks are added here, and
1002 * the inode is never added to the transaction.
1003 */
1004 lock_mode = xfs_ilock_data_map_shared(qip);
1005 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1006 map, &nmaps, 0);
1007 xfs_iunlock(qip, lock_mode);
1008 if (error)
1009 break;
1010
1011 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1012 for (i = 0; i < nmaps; i++) {
1013 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1014 ASSERT(map[i].br_blockcount);
1015
1016
1017 lblkno += map[i].br_blockcount;
1018
1019 if (map[i].br_startblock == HOLESTARTBLOCK)
1020 continue;
1021
1022 firstid = (xfs_dqid_t) map[i].br_startoff *
1023 mp->m_quotainfo->qi_dqperchunk;
1024 /*
1025 * Do a read-ahead on the next extent.
1026 */
1027 if ((i+1 < nmaps) &&
1028 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1029 rablkcnt = map[i+1].br_blockcount;
1030 rablkno = map[i+1].br_startblock;
1031 while (rablkcnt--) {
1032 xfs_buf_readahead(mp->m_ddev_targp,
1033 XFS_FSB_TO_DADDR(mp, rablkno),
1034 mp->m_quotainfo->qi_dqchunklen,
1035 &xfs_dquot_buf_ops);
1036 rablkno++;
1037 }
1038 }
1039 /*
1040 * Iterate thru all the blks in the extent and
1041 * reset the counters of all the dquots inside them.
1042 */
1043 error = xfs_qm_dqiter_bufs(mp, firstid,
1044 map[i].br_startblock,
1045 map[i].br_blockcount,
1046 flags, buffer_list);
1047 if (error)
1048 goto out;
1049 }
1050 } while (nmaps > 0);
1051
1052 out:
1053 kmem_free(map);
1054 return error;
1055 }
1056
1057 /*
1058 * Called by dqusage_adjust in doing a quotacheck.
1059 *
1060 * Given the inode, and a dquot id this updates both the incore dqout as well
1061 * as the buffer copy. This is so that once the quotacheck is done, we can
1062 * just log all the buffers, as opposed to logging numerous updates to
1063 * individual dquots.
1064 */
1065 STATIC int
xfs_qm_quotacheck_dqadjust(struct xfs_inode * ip,xfs_dqid_t id,uint type,xfs_qcnt_t nblks,xfs_qcnt_t rtblks)1066 xfs_qm_quotacheck_dqadjust(
1067 struct xfs_inode *ip,
1068 xfs_dqid_t id,
1069 uint type,
1070 xfs_qcnt_t nblks,
1071 xfs_qcnt_t rtblks)
1072 {
1073 struct xfs_mount *mp = ip->i_mount;
1074 struct xfs_dquot *dqp;
1075 int error;
1076
1077 error = xfs_qm_dqget(mp, ip, id, type,
1078 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1079 if (error) {
1080 /*
1081 * Shouldn't be able to turn off quotas here.
1082 */
1083 ASSERT(error != -ESRCH);
1084 ASSERT(error != -ENOENT);
1085 return error;
1086 }
1087
1088 trace_xfs_dqadjust(dqp);
1089
1090 /*
1091 * Adjust the inode count and the block count to reflect this inode's
1092 * resource usage.
1093 */
1094 be64_add_cpu(&dqp->q_core.d_icount, 1);
1095 dqp->q_res_icount++;
1096 if (nblks) {
1097 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1098 dqp->q_res_bcount += nblks;
1099 }
1100 if (rtblks) {
1101 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1102 dqp->q_res_rtbcount += rtblks;
1103 }
1104
1105 /*
1106 * Set default limits, adjust timers (since we changed usages)
1107 *
1108 * There are no timers for the default values set in the root dquot.
1109 */
1110 if (dqp->q_core.d_id) {
1111 xfs_qm_adjust_dqlimits(mp, dqp);
1112 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1113 }
1114
1115 dqp->dq_flags |= XFS_DQ_DIRTY;
1116 xfs_qm_dqput(dqp);
1117 return 0;
1118 }
1119
1120 /*
1121 * callback routine supplied to bulkstat(). Given an inumber, find its
1122 * dquots and update them to account for resources taken by that inode.
1123 */
1124 /* ARGSUSED */
1125 STATIC int
xfs_qm_dqusage_adjust(xfs_mount_t * mp,xfs_ino_t ino,void __user * buffer,int ubsize,int * ubused,int * res)1126 xfs_qm_dqusage_adjust(
1127 xfs_mount_t *mp, /* mount point for filesystem */
1128 xfs_ino_t ino, /* inode number to get data for */
1129 void __user *buffer, /* not used */
1130 int ubsize, /* not used */
1131 int *ubused, /* not used */
1132 int *res) /* result code value */
1133 {
1134 xfs_inode_t *ip;
1135 xfs_qcnt_t nblks;
1136 xfs_filblks_t rtblks = 0; /* total rt blks */
1137 int error;
1138
1139 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1140
1141 /*
1142 * rootino must have its resources accounted for, not so with the quota
1143 * inodes.
1144 */
1145 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1146 *res = BULKSTAT_RV_NOTHING;
1147 return -EINVAL;
1148 }
1149
1150 /*
1151 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1152 * interface expects the inode to be exclusively locked because that's
1153 * the case in all other instances. It's OK that we do this because
1154 * quotacheck is done only at mount time.
1155 */
1156 error = xfs_iget(mp, NULL, ino, XFS_IGET_DONTCACHE, XFS_ILOCK_EXCL,
1157 &ip);
1158 if (error) {
1159 *res = BULKSTAT_RV_NOTHING;
1160 return error;
1161 }
1162
1163 ASSERT(ip->i_delayed_blks == 0);
1164
1165 if (XFS_IS_REALTIME_INODE(ip)) {
1166 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1167
1168 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1169 error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
1170 if (error)
1171 goto error0;
1172 }
1173
1174 xfs_bmap_count_leaves(ifp, &rtblks);
1175 }
1176
1177 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1178
1179 /*
1180 * Add the (disk blocks and inode) resources occupied by this
1181 * inode to its dquots. We do this adjustment in the incore dquot,
1182 * and also copy the changes to its buffer.
1183 * We don't care about putting these changes in a transaction
1184 * envelope because if we crash in the middle of a 'quotacheck'
1185 * we have to start from the beginning anyway.
1186 * Once we're done, we'll log all the dquot bufs.
1187 *
1188 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1189 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1190 */
1191 if (XFS_IS_UQUOTA_ON(mp)) {
1192 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1193 XFS_DQ_USER, nblks, rtblks);
1194 if (error)
1195 goto error0;
1196 }
1197
1198 if (XFS_IS_GQUOTA_ON(mp)) {
1199 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1200 XFS_DQ_GROUP, nblks, rtblks);
1201 if (error)
1202 goto error0;
1203 }
1204
1205 if (XFS_IS_PQUOTA_ON(mp)) {
1206 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1207 XFS_DQ_PROJ, nblks, rtblks);
1208 if (error)
1209 goto error0;
1210 }
1211
1212 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1213 IRELE(ip);
1214 *res = BULKSTAT_RV_DIDONE;
1215 return 0;
1216
1217 error0:
1218 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1219 IRELE(ip);
1220 *res = BULKSTAT_RV_GIVEUP;
1221 return error;
1222 }
1223
1224 STATIC int
xfs_qm_flush_one(struct xfs_dquot * dqp,void * data)1225 xfs_qm_flush_one(
1226 struct xfs_dquot *dqp,
1227 void *data)
1228 {
1229 struct xfs_mount *mp = dqp->q_mount;
1230 struct list_head *buffer_list = data;
1231 struct xfs_buf *bp = NULL;
1232 int error = 0;
1233
1234 xfs_dqlock(dqp);
1235 if (dqp->dq_flags & XFS_DQ_FREEING)
1236 goto out_unlock;
1237 if (!XFS_DQ_IS_DIRTY(dqp))
1238 goto out_unlock;
1239
1240 /*
1241 * The only way the dquot is already flush locked by the time quotacheck
1242 * gets here is if reclaim flushed it before the dqadjust walk dirtied
1243 * it for the final time. Quotacheck collects all dquot bufs in the
1244 * local delwri queue before dquots are dirtied, so reclaim can't have
1245 * possibly queued it for I/O. The only way out is to push the buffer to
1246 * cycle the flush lock.
1247 */
1248 if (!xfs_dqflock_nowait(dqp)) {
1249 /* buf is pinned in-core by delwri list */
1250 DEFINE_SINGLE_BUF_MAP(map, dqp->q_blkno,
1251 mp->m_quotainfo->qi_dqchunklen);
1252 bp = _xfs_buf_find(mp->m_ddev_targp, &map, 1, 0, NULL);
1253 if (!bp) {
1254 error = -EINVAL;
1255 goto out_unlock;
1256 }
1257 xfs_buf_unlock(bp);
1258
1259 xfs_buf_delwri_pushbuf(bp, buffer_list);
1260 xfs_buf_rele(bp);
1261
1262 error = -EAGAIN;
1263 goto out_unlock;
1264 }
1265
1266 error = xfs_qm_dqflush(dqp, &bp);
1267 if (error)
1268 goto out_unlock;
1269
1270 xfs_buf_delwri_queue(bp, buffer_list);
1271 xfs_buf_relse(bp);
1272 out_unlock:
1273 xfs_dqunlock(dqp);
1274 return error;
1275 }
1276
1277 /*
1278 * Walk thru all the filesystem inodes and construct a consistent view
1279 * of the disk quota world. If the quotacheck fails, disable quotas.
1280 */
1281 STATIC int
xfs_qm_quotacheck(xfs_mount_t * mp)1282 xfs_qm_quotacheck(
1283 xfs_mount_t *mp)
1284 {
1285 int done, count, error, error2;
1286 xfs_ino_t lastino;
1287 size_t structsz;
1288 uint flags;
1289 LIST_HEAD (buffer_list);
1290 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1291 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1292 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1293
1294 count = INT_MAX;
1295 structsz = 1;
1296 lastino = 0;
1297 flags = 0;
1298
1299 ASSERT(uip || gip || pip);
1300 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1301
1302 xfs_notice(mp, "Quotacheck needed: Please wait.");
1303
1304 /*
1305 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1306 * their counters to zero. We need a clean slate.
1307 * We don't log our changes till later.
1308 */
1309 if (uip) {
1310 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1311 &buffer_list);
1312 if (error)
1313 goto error_return;
1314 flags |= XFS_UQUOTA_CHKD;
1315 }
1316
1317 if (gip) {
1318 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1319 &buffer_list);
1320 if (error)
1321 goto error_return;
1322 flags |= XFS_GQUOTA_CHKD;
1323 }
1324
1325 if (pip) {
1326 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1327 &buffer_list);
1328 if (error)
1329 goto error_return;
1330 flags |= XFS_PQUOTA_CHKD;
1331 }
1332
1333 do {
1334 /*
1335 * Iterate thru all the inodes in the file system,
1336 * adjusting the corresponding dquot counters in core.
1337 */
1338 error = xfs_bulkstat(mp, &lastino, &count,
1339 xfs_qm_dqusage_adjust,
1340 structsz, NULL, &done);
1341 if (error)
1342 break;
1343
1344 } while (!done);
1345
1346 /*
1347 * We've made all the changes that we need to make incore. Flush them
1348 * down to disk buffers if everything was updated successfully.
1349 */
1350 if (XFS_IS_UQUOTA_ON(mp)) {
1351 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1352 &buffer_list);
1353 }
1354 if (XFS_IS_GQUOTA_ON(mp)) {
1355 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1356 &buffer_list);
1357 if (!error)
1358 error = error2;
1359 }
1360 if (XFS_IS_PQUOTA_ON(mp)) {
1361 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1362 &buffer_list);
1363 if (!error)
1364 error = error2;
1365 }
1366
1367 error2 = xfs_buf_delwri_submit(&buffer_list);
1368 if (!error)
1369 error = error2;
1370
1371 /*
1372 * We can get this error if we couldn't do a dquot allocation inside
1373 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1374 * dirty dquots that might be cached, we just want to get rid of them
1375 * and turn quotaoff. The dquots won't be attached to any of the inodes
1376 * at this point (because we intentionally didn't in dqget_noattach).
1377 */
1378 if (error) {
1379 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1380 goto error_return;
1381 }
1382
1383 /*
1384 * If one type of quotas is off, then it will lose its
1385 * quotachecked status, since we won't be doing accounting for
1386 * that type anymore.
1387 */
1388 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1389 mp->m_qflags |= flags;
1390
1391 error_return:
1392 xfs_buf_delwri_cancel(&buffer_list);
1393
1394 if (error) {
1395 xfs_warn(mp,
1396 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1397 error);
1398 /*
1399 * We must turn off quotas.
1400 */
1401 ASSERT(mp->m_quotainfo != NULL);
1402 xfs_qm_destroy_quotainfo(mp);
1403 if (xfs_mount_reset_sbqflags(mp)) {
1404 xfs_warn(mp,
1405 "Quotacheck: Failed to reset quota flags.");
1406 }
1407 } else
1408 xfs_notice(mp, "Quotacheck: Done.");
1409 return error;
1410 }
1411
1412 /*
1413 * This is called from xfs_mountfs to start quotas and initialize all
1414 * necessary data structures like quotainfo. This is also responsible for
1415 * running a quotacheck as necessary. We are guaranteed that the superblock
1416 * is consistently read in at this point.
1417 *
1418 * If we fail here, the mount will continue with quota turned off. We don't
1419 * need to inidicate success or failure at all.
1420 */
1421 void
xfs_qm_mount_quotas(struct xfs_mount * mp)1422 xfs_qm_mount_quotas(
1423 struct xfs_mount *mp)
1424 {
1425 int error = 0;
1426 uint sbf;
1427
1428 /*
1429 * If quotas on realtime volumes is not supported, we disable
1430 * quotas immediately.
1431 */
1432 if (mp->m_sb.sb_rextents) {
1433 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
1434 mp->m_qflags = 0;
1435 goto write_changes;
1436 }
1437
1438 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1439
1440 /*
1441 * Allocate the quotainfo structure inside the mount struct, and
1442 * create quotainode(s), and change/rev superblock if necessary.
1443 */
1444 error = xfs_qm_init_quotainfo(mp);
1445 if (error) {
1446 /*
1447 * We must turn off quotas.
1448 */
1449 ASSERT(mp->m_quotainfo == NULL);
1450 mp->m_qflags = 0;
1451 goto write_changes;
1452 }
1453 /*
1454 * If any of the quotas are not consistent, do a quotacheck.
1455 */
1456 if (XFS_QM_NEED_QUOTACHECK(mp)) {
1457 error = xfs_qm_quotacheck(mp);
1458 if (error) {
1459 /* Quotacheck failed and disabled quotas. */
1460 return;
1461 }
1462 }
1463 /*
1464 * If one type of quotas is off, then it will lose its
1465 * quotachecked status, since we won't be doing accounting for
1466 * that type anymore.
1467 */
1468 if (!XFS_IS_UQUOTA_ON(mp))
1469 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
1470 if (!XFS_IS_GQUOTA_ON(mp))
1471 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
1472 if (!XFS_IS_PQUOTA_ON(mp))
1473 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
1474
1475 write_changes:
1476 /*
1477 * We actually don't have to acquire the m_sb_lock at all.
1478 * This can only be called from mount, and that's single threaded. XXX
1479 */
1480 spin_lock(&mp->m_sb_lock);
1481 sbf = mp->m_sb.sb_qflags;
1482 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
1483 spin_unlock(&mp->m_sb_lock);
1484
1485 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
1486 if (xfs_sync_sb(mp, false)) {
1487 /*
1488 * We could only have been turning quotas off.
1489 * We aren't in very good shape actually because
1490 * the incore structures are convinced that quotas are
1491 * off, but the on disk superblock doesn't know that !
1492 */
1493 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
1494 xfs_alert(mp, "%s: Superblock update failed!",
1495 __func__);
1496 }
1497 }
1498
1499 if (error) {
1500 xfs_warn(mp, "Failed to initialize disk quotas.");
1501 return;
1502 }
1503 }
1504
1505 /*
1506 * This is called after the superblock has been read in and we're ready to
1507 * iget the quota inodes.
1508 */
1509 STATIC int
xfs_qm_init_quotainos(xfs_mount_t * mp)1510 xfs_qm_init_quotainos(
1511 xfs_mount_t *mp)
1512 {
1513 struct xfs_inode *uip = NULL;
1514 struct xfs_inode *gip = NULL;
1515 struct xfs_inode *pip = NULL;
1516 int error;
1517 uint flags = 0;
1518
1519 ASSERT(mp->m_quotainfo);
1520
1521 /*
1522 * Get the uquota and gquota inodes
1523 */
1524 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1525 if (XFS_IS_UQUOTA_ON(mp) &&
1526 mp->m_sb.sb_uquotino != NULLFSINO) {
1527 ASSERT(mp->m_sb.sb_uquotino > 0);
1528 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1529 0, 0, &uip);
1530 if (error)
1531 return error;
1532 }
1533 if (XFS_IS_GQUOTA_ON(mp) &&
1534 mp->m_sb.sb_gquotino != NULLFSINO) {
1535 ASSERT(mp->m_sb.sb_gquotino > 0);
1536 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1537 0, 0, &gip);
1538 if (error)
1539 goto error_rele;
1540 }
1541 if (XFS_IS_PQUOTA_ON(mp) &&
1542 mp->m_sb.sb_pquotino != NULLFSINO) {
1543 ASSERT(mp->m_sb.sb_pquotino > 0);
1544 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1545 0, 0, &pip);
1546 if (error)
1547 goto error_rele;
1548 }
1549 } else {
1550 flags |= XFS_QMOPT_SBVERSION;
1551 }
1552
1553 /*
1554 * Create the three inodes, if they don't exist already. The changes
1555 * made above will get added to a transaction and logged in one of
1556 * the qino_alloc calls below. If the device is readonly,
1557 * temporarily switch to read-write to do this.
1558 */
1559 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1560 error = xfs_qm_qino_alloc(mp, &uip,
1561 flags | XFS_QMOPT_UQUOTA);
1562 if (error)
1563 goto error_rele;
1564
1565 flags &= ~XFS_QMOPT_SBVERSION;
1566 }
1567 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1568 error = xfs_qm_qino_alloc(mp, &gip,
1569 flags | XFS_QMOPT_GQUOTA);
1570 if (error)
1571 goto error_rele;
1572
1573 flags &= ~XFS_QMOPT_SBVERSION;
1574 }
1575 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1576 error = xfs_qm_qino_alloc(mp, &pip,
1577 flags | XFS_QMOPT_PQUOTA);
1578 if (error)
1579 goto error_rele;
1580 }
1581
1582 mp->m_quotainfo->qi_uquotaip = uip;
1583 mp->m_quotainfo->qi_gquotaip = gip;
1584 mp->m_quotainfo->qi_pquotaip = pip;
1585
1586 return 0;
1587
1588 error_rele:
1589 if (uip)
1590 IRELE(uip);
1591 if (gip)
1592 IRELE(gip);
1593 if (pip)
1594 IRELE(pip);
1595 return error;
1596 }
1597
1598 STATIC void
xfs_qm_destroy_quotainos(xfs_quotainfo_t * qi)1599 xfs_qm_destroy_quotainos(
1600 xfs_quotainfo_t *qi)
1601 {
1602 if (qi->qi_uquotaip) {
1603 IRELE(qi->qi_uquotaip);
1604 qi->qi_uquotaip = NULL; /* paranoia */
1605 }
1606 if (qi->qi_gquotaip) {
1607 IRELE(qi->qi_gquotaip);
1608 qi->qi_gquotaip = NULL;
1609 }
1610 if (qi->qi_pquotaip) {
1611 IRELE(qi->qi_pquotaip);
1612 qi->qi_pquotaip = NULL;
1613 }
1614 }
1615
1616 STATIC void
xfs_qm_dqfree_one(struct xfs_dquot * dqp)1617 xfs_qm_dqfree_one(
1618 struct xfs_dquot *dqp)
1619 {
1620 struct xfs_mount *mp = dqp->q_mount;
1621 struct xfs_quotainfo *qi = mp->m_quotainfo;
1622
1623 mutex_lock(&qi->qi_tree_lock);
1624 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1625 be32_to_cpu(dqp->q_core.d_id));
1626
1627 qi->qi_dquots--;
1628 mutex_unlock(&qi->qi_tree_lock);
1629
1630 xfs_qm_dqdestroy(dqp);
1631 }
1632
1633 /* --------------- utility functions for vnodeops ---------------- */
1634
1635
1636 /*
1637 * Given an inode, a uid, gid and prid make sure that we have
1638 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1639 * quotas by creating this file.
1640 * This also attaches dquot(s) to the given inode after locking it,
1641 * and returns the dquots corresponding to the uid and/or gid.
1642 *
1643 * in : inode (unlocked)
1644 * out : udquot, gdquot with references taken and unlocked
1645 */
1646 int
xfs_qm_vop_dqalloc(struct xfs_inode * ip,xfs_dqid_t uid,xfs_dqid_t gid,prid_t prid,uint flags,struct xfs_dquot ** O_udqpp,struct xfs_dquot ** O_gdqpp,struct xfs_dquot ** O_pdqpp)1647 xfs_qm_vop_dqalloc(
1648 struct xfs_inode *ip,
1649 xfs_dqid_t uid,
1650 xfs_dqid_t gid,
1651 prid_t prid,
1652 uint flags,
1653 struct xfs_dquot **O_udqpp,
1654 struct xfs_dquot **O_gdqpp,
1655 struct xfs_dquot **O_pdqpp)
1656 {
1657 struct xfs_mount *mp = ip->i_mount;
1658 struct xfs_dquot *uq = NULL;
1659 struct xfs_dquot *gq = NULL;
1660 struct xfs_dquot *pq = NULL;
1661 int error;
1662 uint lockflags;
1663
1664 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1665 return 0;
1666
1667 lockflags = XFS_ILOCK_EXCL;
1668 xfs_ilock(ip, lockflags);
1669
1670 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1671 gid = ip->i_d.di_gid;
1672
1673 /*
1674 * Attach the dquot(s) to this inode, doing a dquot allocation
1675 * if necessary. The dquot(s) will not be locked.
1676 */
1677 if (XFS_NOT_DQATTACHED(mp, ip)) {
1678 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1679 if (error) {
1680 xfs_iunlock(ip, lockflags);
1681 return error;
1682 }
1683 }
1684
1685 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1686 if (ip->i_d.di_uid != uid) {
1687 /*
1688 * What we need is the dquot that has this uid, and
1689 * if we send the inode to dqget, the uid of the inode
1690 * takes priority over what's sent in the uid argument.
1691 * We must unlock inode here before calling dqget if
1692 * we're not sending the inode, because otherwise
1693 * we'll deadlock by doing trans_reserve while
1694 * holding ilock.
1695 */
1696 xfs_iunlock(ip, lockflags);
1697 error = xfs_qm_dqget(mp, NULL, uid,
1698 XFS_DQ_USER,
1699 XFS_QMOPT_DQALLOC |
1700 XFS_QMOPT_DOWARN,
1701 &uq);
1702 if (error) {
1703 ASSERT(error != -ENOENT);
1704 return error;
1705 }
1706 /*
1707 * Get the ilock in the right order.
1708 */
1709 xfs_dqunlock(uq);
1710 lockflags = XFS_ILOCK_SHARED;
1711 xfs_ilock(ip, lockflags);
1712 } else {
1713 /*
1714 * Take an extra reference, because we'll return
1715 * this to caller
1716 */
1717 ASSERT(ip->i_udquot);
1718 uq = xfs_qm_dqhold(ip->i_udquot);
1719 }
1720 }
1721 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1722 if (ip->i_d.di_gid != gid) {
1723 xfs_iunlock(ip, lockflags);
1724 error = xfs_qm_dqget(mp, NULL, gid,
1725 XFS_DQ_GROUP,
1726 XFS_QMOPT_DQALLOC |
1727 XFS_QMOPT_DOWARN,
1728 &gq);
1729 if (error) {
1730 ASSERT(error != -ENOENT);
1731 goto error_rele;
1732 }
1733 xfs_dqunlock(gq);
1734 lockflags = XFS_ILOCK_SHARED;
1735 xfs_ilock(ip, lockflags);
1736 } else {
1737 ASSERT(ip->i_gdquot);
1738 gq = xfs_qm_dqhold(ip->i_gdquot);
1739 }
1740 }
1741 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1742 if (xfs_get_projid(ip) != prid) {
1743 xfs_iunlock(ip, lockflags);
1744 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1745 XFS_DQ_PROJ,
1746 XFS_QMOPT_DQALLOC |
1747 XFS_QMOPT_DOWARN,
1748 &pq);
1749 if (error) {
1750 ASSERT(error != -ENOENT);
1751 goto error_rele;
1752 }
1753 xfs_dqunlock(pq);
1754 lockflags = XFS_ILOCK_SHARED;
1755 xfs_ilock(ip, lockflags);
1756 } else {
1757 ASSERT(ip->i_pdquot);
1758 pq = xfs_qm_dqhold(ip->i_pdquot);
1759 }
1760 }
1761 if (uq)
1762 trace_xfs_dquot_dqalloc(ip);
1763
1764 xfs_iunlock(ip, lockflags);
1765 if (O_udqpp)
1766 *O_udqpp = uq;
1767 else
1768 xfs_qm_dqrele(uq);
1769 if (O_gdqpp)
1770 *O_gdqpp = gq;
1771 else
1772 xfs_qm_dqrele(gq);
1773 if (O_pdqpp)
1774 *O_pdqpp = pq;
1775 else
1776 xfs_qm_dqrele(pq);
1777 return 0;
1778
1779 error_rele:
1780 xfs_qm_dqrele(gq);
1781 xfs_qm_dqrele(uq);
1782 return error;
1783 }
1784
1785 /*
1786 * Actually transfer ownership, and do dquot modifications.
1787 * These were already reserved.
1788 */
1789 xfs_dquot_t *
xfs_qm_vop_chown(xfs_trans_t * tp,xfs_inode_t * ip,xfs_dquot_t ** IO_olddq,xfs_dquot_t * newdq)1790 xfs_qm_vop_chown(
1791 xfs_trans_t *tp,
1792 xfs_inode_t *ip,
1793 xfs_dquot_t **IO_olddq,
1794 xfs_dquot_t *newdq)
1795 {
1796 xfs_dquot_t *prevdq;
1797 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1798 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1799
1800
1801 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1802 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1803
1804 /* old dquot */
1805 prevdq = *IO_olddq;
1806 ASSERT(prevdq);
1807 ASSERT(prevdq != newdq);
1808
1809 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1810 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1811
1812 /* the sparkling new dquot */
1813 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1814 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1815
1816 /*
1817 * Take an extra reference, because the inode is going to keep
1818 * this dquot pointer even after the trans_commit.
1819 */
1820 *IO_olddq = xfs_qm_dqhold(newdq);
1821
1822 return prevdq;
1823 }
1824
1825 /*
1826 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1827 */
1828 int
xfs_qm_vop_chown_reserve(struct xfs_trans * tp,struct xfs_inode * ip,struct xfs_dquot * udqp,struct xfs_dquot * gdqp,struct xfs_dquot * pdqp,uint flags)1829 xfs_qm_vop_chown_reserve(
1830 struct xfs_trans *tp,
1831 struct xfs_inode *ip,
1832 struct xfs_dquot *udqp,
1833 struct xfs_dquot *gdqp,
1834 struct xfs_dquot *pdqp,
1835 uint flags)
1836 {
1837 struct xfs_mount *mp = ip->i_mount;
1838 uint delblks, blkflags, prjflags = 0;
1839 struct xfs_dquot *udq_unres = NULL;
1840 struct xfs_dquot *gdq_unres = NULL;
1841 struct xfs_dquot *pdq_unres = NULL;
1842 struct xfs_dquot *udq_delblks = NULL;
1843 struct xfs_dquot *gdq_delblks = NULL;
1844 struct xfs_dquot *pdq_delblks = NULL;
1845 int error;
1846
1847
1848 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1849 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1850
1851 delblks = ip->i_delayed_blks;
1852 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1853 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1854
1855 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1856 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
1857 udq_delblks = udqp;
1858 /*
1859 * If there are delayed allocation blocks, then we have to
1860 * unreserve those from the old dquot, and add them to the
1861 * new dquot.
1862 */
1863 if (delblks) {
1864 ASSERT(ip->i_udquot);
1865 udq_unres = ip->i_udquot;
1866 }
1867 }
1868 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1869 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1870 gdq_delblks = gdqp;
1871 if (delblks) {
1872 ASSERT(ip->i_gdquot);
1873 gdq_unres = ip->i_gdquot;
1874 }
1875 }
1876
1877 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1878 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
1879 prjflags = XFS_QMOPT_ENOSPC;
1880 pdq_delblks = pdqp;
1881 if (delblks) {
1882 ASSERT(ip->i_pdquot);
1883 pdq_unres = ip->i_pdquot;
1884 }
1885 }
1886
1887 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1888 udq_delblks, gdq_delblks, pdq_delblks,
1889 ip->i_d.di_nblocks, 1,
1890 flags | blkflags | prjflags);
1891 if (error)
1892 return error;
1893
1894 /*
1895 * Do the delayed blks reservations/unreservations now. Since, these
1896 * are done without the help of a transaction, if a reservation fails
1897 * its previous reservations won't be automatically undone by trans
1898 * code. So, we have to do it manually here.
1899 */
1900 if (delblks) {
1901 /*
1902 * Do the reservations first. Unreservation can't fail.
1903 */
1904 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
1905 ASSERT(udq_unres || gdq_unres || pdq_unres);
1906 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1907 udq_delblks, gdq_delblks, pdq_delblks,
1908 (xfs_qcnt_t)delblks, 0,
1909 flags | blkflags | prjflags);
1910 if (error)
1911 return error;
1912 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1913 udq_unres, gdq_unres, pdq_unres,
1914 -((xfs_qcnt_t)delblks), 0, blkflags);
1915 }
1916
1917 return 0;
1918 }
1919
1920 int
xfs_qm_vop_rename_dqattach(struct xfs_inode ** i_tab)1921 xfs_qm_vop_rename_dqattach(
1922 struct xfs_inode **i_tab)
1923 {
1924 struct xfs_mount *mp = i_tab[0]->i_mount;
1925 int i;
1926
1927 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1928 return 0;
1929
1930 for (i = 0; (i < 4 && i_tab[i]); i++) {
1931 struct xfs_inode *ip = i_tab[i];
1932 int error;
1933
1934 /*
1935 * Watch out for duplicate entries in the table.
1936 */
1937 if (i == 0 || ip != i_tab[i-1]) {
1938 if (XFS_NOT_DQATTACHED(mp, ip)) {
1939 error = xfs_qm_dqattach(ip, 0);
1940 if (error)
1941 return error;
1942 }
1943 }
1944 }
1945 return 0;
1946 }
1947
1948 void
xfs_qm_vop_create_dqattach(struct xfs_trans * tp,struct xfs_inode * ip,struct xfs_dquot * udqp,struct xfs_dquot * gdqp,struct xfs_dquot * pdqp)1949 xfs_qm_vop_create_dqattach(
1950 struct xfs_trans *tp,
1951 struct xfs_inode *ip,
1952 struct xfs_dquot *udqp,
1953 struct xfs_dquot *gdqp,
1954 struct xfs_dquot *pdqp)
1955 {
1956 struct xfs_mount *mp = tp->t_mountp;
1957
1958 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1959 return;
1960
1961 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1962 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1963
1964 if (udqp && XFS_IS_UQUOTA_ON(mp)) {
1965 ASSERT(ip->i_udquot == NULL);
1966 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
1967
1968 ip->i_udquot = xfs_qm_dqhold(udqp);
1969 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1970 }
1971 if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
1972 ASSERT(ip->i_gdquot == NULL);
1973 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
1974 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1975 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1976 }
1977 if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
1978 ASSERT(ip->i_pdquot == NULL);
1979 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
1980
1981 ip->i_pdquot = xfs_qm_dqhold(pdqp);
1982 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
1983 }
1984 }
1985
1986