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1 /*
2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3  * All Rights Reserved.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it would be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write the Free Software Foundation,
16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17  */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_bit.h"
25 #include "xfs_sb.h"
26 #include "xfs_mount.h"
27 #include "xfs_inode.h"
28 #include "xfs_ialloc.h"
29 #include "xfs_itable.h"
30 #include "xfs_quota.h"
31 #include "xfs_error.h"
32 #include "xfs_bmap.h"
33 #include "xfs_bmap_btree.h"
34 #include "xfs_trans.h"
35 #include "xfs_trans_space.h"
36 #include "xfs_qm.h"
37 #include "xfs_trace.h"
38 #include "xfs_icache.h"
39 #include "xfs_cksum.h"
40
41 /*
42  * The global quota manager. There is only one of these for the entire
43  * system, _not_ one per file system. XQM keeps track of the overall
44  * quota functionality, including maintaining the freelist and hash
45  * tables of dquots.
46  */
47 STATIC int      xfs_qm_init_quotainos(xfs_mount_t *);
48 STATIC int      xfs_qm_init_quotainfo(xfs_mount_t *);
49
50
51 STATIC void     xfs_qm_dqfree_one(struct xfs_dquot *dqp);
52 /*
53  * We use the batch lookup interface to iterate over the dquots as it
54  * currently is the only interface into the radix tree code that allows
55  * fuzzy lookups instead of exact matches.  Holding the lock over multiple
56  * operations is fine as all callers are used either during mount/umount
57  * or quotaoff.
58  */
59 #define XFS_DQ_LOOKUP_BATCH     32
60
61 STATIC int
62 xfs_qm_dquot_walk(
63         struct xfs_mount        *mp,
64         int                     type,
65         int                     (*execute)(struct xfs_dquot *dqp, void *data),
66         void                    *data)
67 {
68         struct xfs_quotainfo    *qi = mp->m_quotainfo;
69         struct radix_tree_root  *tree = xfs_dquot_tree(qi, type);
70         uint32_t                next_index;
71         int                     last_error = 0;
72         int                     skipped;
73         int                     nr_found;
74
75 restart:
76         skipped = 0;
77         next_index = 0;
78         nr_found = 0;
79
80         while (1) {
81                 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
82                 int             error = 0;
83                 int             i;
84
85                 mutex_lock(&qi->qi_tree_lock);
86                 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
87                                         next_index, XFS_DQ_LOOKUP_BATCH);
88                 if (!nr_found) {
89                         mutex_unlock(&qi->qi_tree_lock);
90                         break;
91                 }
92
93                 for (i = 0; i < nr_found; i++) {
94                         struct xfs_dquot *dqp = batch[i];
95
96                         next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
97
98                         error = execute(batch[i], data);
99                         if (error == -EAGAIN) {
100                                 skipped++;
101                                 continue;
102                         }
103                         if (error && last_error != -EFSCORRUPTED)
104                                 last_error = error;
105                 }
106
107                 mutex_unlock(&qi->qi_tree_lock);
108
109                 /* bail out if the filesystem is corrupted.  */
110                 if (last_error == -EFSCORRUPTED) {
111                         skipped = 0;
112                         break;
113                 }
114         }
115
116         if (skipped) {
117                 delay(1);
118                 goto restart;
119         }
120
121         return last_error;
122 }
123
124
125 /*
126  * Purge a dquot from all tracking data structures and free it.
127  */
128 STATIC int
129 xfs_qm_dqpurge(
130         struct xfs_dquot        *dqp,
131         void                    *data)
132 {
133         struct xfs_mount        *mp = dqp->q_mount;
134         struct xfs_quotainfo    *qi = mp->m_quotainfo;
135
136         xfs_dqlock(dqp);
137         if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
138                 xfs_dqunlock(dqp);
139                 return -EAGAIN;
140         }
141
142         dqp->dq_flags |= XFS_DQ_FREEING;
143
144         xfs_dqflock(dqp);
145
146         /*
147          * If we are turning this type of quotas off, we don't care
148          * about the dirty metadata sitting in this dquot. OTOH, if
149          * we're unmounting, we do care, so we flush it and wait.
150          */
151         if (XFS_DQ_IS_DIRTY(dqp)) {
152                 struct xfs_buf  *bp = NULL;
153                 int             error;
154
155                 /*
156                  * We don't care about getting disk errors here. We need
157                  * to purge this dquot anyway, so we go ahead regardless.
158                  */
159                 error = xfs_qm_dqflush(dqp, &bp);
160                 if (error) {
161                         xfs_warn(mp, "%s: dquot %p flush failed",
162                                 __func__, dqp);
163                 } else {
164                         error = xfs_bwrite(bp);
165                         xfs_buf_relse(bp);
166                 }
167                 xfs_dqflock(dqp);
168         }
169
170         ASSERT(atomic_read(&dqp->q_pincount) == 0);
171         ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
172                !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
173
174         xfs_dqfunlock(dqp);
175         xfs_dqunlock(dqp);
176
177         radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
178                           be32_to_cpu(dqp->q_core.d_id));
179         qi->qi_dquots--;
180
181         /*
182          * We move dquots to the freelist as soon as their reference count
183          * hits zero, so it really should be on the freelist here.
184          */
185         ASSERT(!list_empty(&dqp->q_lru));
186         list_lru_del(&qi->qi_lru, &dqp->q_lru);
187         XFS_STATS_DEC(mp, xs_qm_dquot_unused);
188
189         xfs_qm_dqdestroy(dqp);
190         return 0;
191 }
192
193 /*
194  * Purge the dquot cache.
195  */
196 void
197 xfs_qm_dqpurge_all(
198         struct xfs_mount        *mp,
199         uint                    flags)
200 {
201         if (flags & XFS_QMOPT_UQUOTA)
202                 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
203         if (flags & XFS_QMOPT_GQUOTA)
204                 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
205         if (flags & XFS_QMOPT_PQUOTA)
206                 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
207 }
208
209 /*
210  * Just destroy the quotainfo structure.
211  */
212 void
213 xfs_qm_unmount(
214         struct xfs_mount        *mp)
215 {
216         if (mp->m_quotainfo) {
217                 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
218                 xfs_qm_destroy_quotainfo(mp);
219         }
220 }
221
222 /*
223  * Called from the vfsops layer.
224  */
225 void
226 xfs_qm_unmount_quotas(
227         xfs_mount_t     *mp)
228 {
229         /*
230          * Release the dquots that root inode, et al might be holding,
231          * before we flush quotas and blow away the quotainfo structure.
232          */
233         ASSERT(mp->m_rootip);
234         xfs_qm_dqdetach(mp->m_rootip);
235         if (mp->m_rbmip)
236                 xfs_qm_dqdetach(mp->m_rbmip);
237         if (mp->m_rsumip)
238                 xfs_qm_dqdetach(mp->m_rsumip);
239
240         /*
241          * Release the quota inodes.
242          */
243         if (mp->m_quotainfo) {
244                 if (mp->m_quotainfo->qi_uquotaip) {
245                         IRELE(mp->m_quotainfo->qi_uquotaip);
246                         mp->m_quotainfo->qi_uquotaip = NULL;
247                 }
248                 if (mp->m_quotainfo->qi_gquotaip) {
249                         IRELE(mp->m_quotainfo->qi_gquotaip);
250                         mp->m_quotainfo->qi_gquotaip = NULL;
251                 }
252                 if (mp->m_quotainfo->qi_pquotaip) {
253                         IRELE(mp->m_quotainfo->qi_pquotaip);
254                         mp->m_quotainfo->qi_pquotaip = NULL;
255                 }
256         }
257 }
258
259 STATIC int
260 xfs_qm_dqattach_one(
261         xfs_inode_t     *ip,
262         xfs_dqid_t      id,
263         uint            type,
264         uint            doalloc,
265         xfs_dquot_t     **IO_idqpp)
266 {
267         xfs_dquot_t     *dqp;
268         int             error;
269
270         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
271         error = 0;
272
273         /*
274          * See if we already have it in the inode itself. IO_idqpp is &i_udquot
275          * or &i_gdquot. This made the code look weird, but made the logic a lot
276          * simpler.
277          */
278         dqp = *IO_idqpp;
279         if (dqp) {
280                 trace_xfs_dqattach_found(dqp);
281                 return 0;
282         }
283
284         /*
285          * Find the dquot from somewhere. This bumps the reference count of
286          * dquot and returns it locked.  This can return ENOENT if dquot didn't
287          * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
288          * turned off suddenly.
289          */
290         error = xfs_qm_dqget(ip->i_mount, ip, id, type,
291                              doalloc | XFS_QMOPT_DOWARN, &dqp);
292         if (error)
293                 return error;
294
295         trace_xfs_dqattach_get(dqp);
296
297         /*
298          * dqget may have dropped and re-acquired the ilock, but it guarantees
299          * that the dquot returned is the one that should go in the inode.
300          */
301         *IO_idqpp = dqp;
302         xfs_dqunlock(dqp);
303         return 0;
304 }
305
306 static bool
307 xfs_qm_need_dqattach(
308         struct xfs_inode        *ip)
309 {
310         struct xfs_mount        *mp = ip->i_mount;
311
312         if (!XFS_IS_QUOTA_RUNNING(mp))
313                 return false;
314         if (!XFS_IS_QUOTA_ON(mp))
315                 return false;
316         if (!XFS_NOT_DQATTACHED(mp, ip))
317                 return false;
318         if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
319                 return false;
320         return true;
321 }
322
323 /*
324  * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
325  * into account.
326  * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
327  * Inode may get unlocked and relocked in here, and the caller must deal with
328  * the consequences.
329  */
330 int
331 xfs_qm_dqattach_locked(
332         xfs_inode_t     *ip,
333         uint            flags)
334 {
335         xfs_mount_t     *mp = ip->i_mount;
336         int             error = 0;
337
338         if (!xfs_qm_need_dqattach(ip))
339                 return 0;
340
341         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
342
343         if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
344                 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
345                                                 flags & XFS_QMOPT_DQALLOC,
346                                                 &ip->i_udquot);
347                 if (error)
348                         goto done;
349                 ASSERT(ip->i_udquot);
350         }
351
352         if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
353                 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
354                                                 flags & XFS_QMOPT_DQALLOC,
355                                                 &ip->i_gdquot);
356                 if (error)
357                         goto done;
358                 ASSERT(ip->i_gdquot);
359         }
360
361         if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
362                 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
363                                                 flags & XFS_QMOPT_DQALLOC,
364                                                 &ip->i_pdquot);
365                 if (error)
366                         goto done;
367                 ASSERT(ip->i_pdquot);
368         }
369
370 done:
371         /*
372          * Don't worry about the dquots that we may have attached before any
373          * error - they'll get detached later if it has not already been done.
374          */
375         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
376         return error;
377 }
378
379 int
380 xfs_qm_dqattach(
381         struct xfs_inode        *ip,
382         uint                    flags)
383 {
384         int                     error;
385
386         if (!xfs_qm_need_dqattach(ip))
387                 return 0;
388
389         xfs_ilock(ip, XFS_ILOCK_EXCL);
390         error = xfs_qm_dqattach_locked(ip, flags);
391         xfs_iunlock(ip, XFS_ILOCK_EXCL);
392
393         return error;
394 }
395
396 /*
397  * Release dquots (and their references) if any.
398  * The inode should be locked EXCL except when this's called by
399  * xfs_ireclaim.
400  */
401 void
402 xfs_qm_dqdetach(
403         xfs_inode_t     *ip)
404 {
405         if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
406                 return;
407
408         trace_xfs_dquot_dqdetach(ip);
409
410         ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
411         if (ip->i_udquot) {
412                 xfs_qm_dqrele(ip->i_udquot);
413                 ip->i_udquot = NULL;
414         }
415         if (ip->i_gdquot) {
416                 xfs_qm_dqrele(ip->i_gdquot);
417                 ip->i_gdquot = NULL;
418         }
419         if (ip->i_pdquot) {
420                 xfs_qm_dqrele(ip->i_pdquot);
421                 ip->i_pdquot = NULL;
422         }
423 }
424
425 struct xfs_qm_isolate {
426         struct list_head        buffers;
427         struct list_head        dispose;
428 };
429
430 static enum lru_status
431 xfs_qm_dquot_isolate(
432         struct list_head        *item,
433         struct list_lru_one     *lru,
434         spinlock_t              *lru_lock,
435         void                    *arg)
436                 __releases(lru_lock) __acquires(lru_lock)
437 {
438         struct xfs_dquot        *dqp = container_of(item,
439                                                 struct xfs_dquot, q_lru);
440         struct xfs_qm_isolate   *isol = arg;
441
442         if (!xfs_dqlock_nowait(dqp))
443                 goto out_miss_busy;
444
445         /*
446          * This dquot has acquired a reference in the meantime remove it from
447          * the freelist and try again.
448          */
449         if (dqp->q_nrefs) {
450                 xfs_dqunlock(dqp);
451                 XFS_STATS_INC(dqp->q_mount, xs_qm_dqwants);
452
453                 trace_xfs_dqreclaim_want(dqp);
454                 list_lru_isolate(lru, &dqp->q_lru);
455                 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
456                 return LRU_REMOVED;
457         }
458
459         /*
460          * If the dquot is dirty, flush it. If it's already being flushed, just
461          * skip it so there is time for the IO to complete before we try to
462          * reclaim it again on the next LRU pass.
463          */
464         if (!xfs_dqflock_nowait(dqp)) {
465                 xfs_dqunlock(dqp);
466                 goto out_miss_busy;
467         }
468
469         if (XFS_DQ_IS_DIRTY(dqp)) {
470                 struct xfs_buf  *bp = NULL;
471                 int             error;
472
473                 trace_xfs_dqreclaim_dirty(dqp);
474
475                 /* we have to drop the LRU lock to flush the dquot */
476                 spin_unlock(lru_lock);
477
478                 error = xfs_qm_dqflush(dqp, &bp);
479                 if (error) {
480                         xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
481                                  __func__, dqp);
482                         goto out_unlock_dirty;
483                 }
484
485                 xfs_buf_delwri_queue(bp, &isol->buffers);
486                 xfs_buf_relse(bp);
487                 goto out_unlock_dirty;
488         }
489         xfs_dqfunlock(dqp);
490
491         /*
492          * Prevent lookups now that we are past the point of no return.
493          */
494         dqp->dq_flags |= XFS_DQ_FREEING;
495         xfs_dqunlock(dqp);
496
497         ASSERT(dqp->q_nrefs == 0);
498         list_lru_isolate_move(lru, &dqp->q_lru, &isol->dispose);
499         XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
500         trace_xfs_dqreclaim_done(dqp);
501         XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaims);
502         return LRU_REMOVED;
503
504 out_miss_busy:
505         trace_xfs_dqreclaim_busy(dqp);
506         XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
507         return LRU_SKIP;
508
509 out_unlock_dirty:
510         trace_xfs_dqreclaim_busy(dqp);
511         XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
512         xfs_dqunlock(dqp);
513         spin_lock(lru_lock);
514         return LRU_RETRY;
515 }
516
517 static unsigned long
518 xfs_qm_shrink_scan(
519         struct shrinker         *shrink,
520         struct shrink_control   *sc)
521 {
522         struct xfs_quotainfo    *qi = container_of(shrink,
523                                         struct xfs_quotainfo, qi_shrinker);
524         struct xfs_qm_isolate   isol;
525         unsigned long           freed;
526         int                     error;
527
528         if ((sc->gfp_mask & (__GFP_FS|__GFP_DIRECT_RECLAIM)) != (__GFP_FS|__GFP_DIRECT_RECLAIM))
529                 return 0;
530
531         INIT_LIST_HEAD(&isol.buffers);
532         INIT_LIST_HEAD(&isol.dispose);
533
534         freed = list_lru_shrink_walk(&qi->qi_lru, sc,
535                                      xfs_qm_dquot_isolate, &isol);
536
537         error = xfs_buf_delwri_submit(&isol.buffers);
538         if (error)
539                 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
540
541         while (!list_empty(&isol.dispose)) {
542                 struct xfs_dquot        *dqp;
543
544                 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
545                 list_del_init(&dqp->q_lru);
546                 xfs_qm_dqfree_one(dqp);
547         }
548
549         return freed;
550 }
551
552 static unsigned long
553 xfs_qm_shrink_count(
554         struct shrinker         *shrink,
555         struct shrink_control   *sc)
556 {
557         struct xfs_quotainfo    *qi = container_of(shrink,
558                                         struct xfs_quotainfo, qi_shrinker);
559
560         return list_lru_shrink_count(&qi->qi_lru, sc);
561 }
562
563 STATIC void
564 xfs_qm_set_defquota(
565         xfs_mount_t     *mp,
566         uint            type,
567         xfs_quotainfo_t *qinf)
568 {
569         xfs_dquot_t             *dqp;
570         struct xfs_def_quota    *defq;
571         int                     error;
572
573         error = xfs_qm_dqread(mp, 0, type, XFS_QMOPT_DOWARN, &dqp);
574
575         if (!error) {
576                 xfs_disk_dquot_t        *ddqp = &dqp->q_core;
577
578                 defq = xfs_get_defquota(dqp, qinf);
579
580                 /*
581                  * Timers and warnings have been already set, let's just set the
582                  * default limits for this quota type
583                  */
584                 defq->bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
585                 defq->bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
586                 defq->ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
587                 defq->isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
588                 defq->rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
589                 defq->rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
590                 xfs_qm_dqdestroy(dqp);
591         }
592 }
593
594 /*
595  * This initializes all the quota information that's kept in the
596  * mount structure
597  */
598 STATIC int
599 xfs_qm_init_quotainfo(
600         xfs_mount_t     *mp)
601 {
602         xfs_quotainfo_t *qinf;
603         int             error;
604         xfs_dquot_t     *dqp;
605
606         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
607
608         qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
609
610         error = list_lru_init(&qinf->qi_lru);
611         if (error)
612                 goto out_free_qinf;
613
614         /*
615          * See if quotainodes are setup, and if not, allocate them,
616          * and change the superblock accordingly.
617          */
618         error = xfs_qm_init_quotainos(mp);
619         if (error)
620                 goto out_free_lru;
621
622         INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
623         INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
624         INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
625         mutex_init(&qinf->qi_tree_lock);
626
627         /* mutex used to serialize quotaoffs */
628         mutex_init(&qinf->qi_quotaofflock);
629
630         /* Precalc some constants */
631         qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
632         qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
633
634         mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
635
636         /*
637          * We try to get the limits from the superuser's limits fields.
638          * This is quite hacky, but it is standard quota practice.
639          *
640          * Since we may not have done a quotacheck by this point, just read
641          * the dquot without attaching it to any hashtables or lists.
642          *
643          * Timers and warnings are globally set by the first timer found in
644          * user/group/proj quota types, otherwise a default value is used.
645          * This should be split into different fields per quota type.
646          */
647         error = xfs_qm_dqread(mp, 0,
648                         XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
649                          (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
650                           XFS_DQ_PROJ),
651                         XFS_QMOPT_DOWARN, &dqp);
652
653         if (!error) {
654                 xfs_disk_dquot_t        *ddqp = &dqp->q_core;
655
656                 /*
657                  * The warnings and timers set the grace period given to
658                  * a user or group before he or she can not perform any
659                  * more writing. If it is zero, a default is used.
660                  */
661                 qinf->qi_btimelimit = ddqp->d_btimer ?
662                         be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
663                 qinf->qi_itimelimit = ddqp->d_itimer ?
664                         be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
665                 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
666                         be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
667                 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
668                         be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
669                 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
670                         be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
671                 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
672                         be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
673                 xfs_qm_dqdestroy(dqp);
674         } else {
675                 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
676                 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
677                 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
678                 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
679                 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
680                 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
681         }
682
683         if (XFS_IS_UQUOTA_RUNNING(mp))
684                 xfs_qm_set_defquota(mp, XFS_DQ_USER, qinf);
685         if (XFS_IS_GQUOTA_RUNNING(mp))
686                 xfs_qm_set_defquota(mp, XFS_DQ_GROUP, qinf);
687         if (XFS_IS_PQUOTA_RUNNING(mp))
688                 xfs_qm_set_defquota(mp, XFS_DQ_PROJ, qinf);
689
690         qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
691         qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
692         qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
693         qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
694         register_shrinker(&qinf->qi_shrinker);
695         return 0;
696
697 out_free_lru:
698         list_lru_destroy(&qinf->qi_lru);
699 out_free_qinf:
700         kmem_free(qinf);
701         mp->m_quotainfo = NULL;
702         return error;
703 }
704
705
706 /*
707  * Gets called when unmounting a filesystem or when all quotas get
708  * turned off.
709  * This purges the quota inodes, destroys locks and frees itself.
710  */
711 void
712 xfs_qm_destroy_quotainfo(
713         xfs_mount_t     *mp)
714 {
715         xfs_quotainfo_t *qi;
716
717         qi = mp->m_quotainfo;
718         ASSERT(qi != NULL);
719
720         unregister_shrinker(&qi->qi_shrinker);
721         list_lru_destroy(&qi->qi_lru);
722
723         if (qi->qi_uquotaip) {
724                 IRELE(qi->qi_uquotaip);
725                 qi->qi_uquotaip = NULL; /* paranoia */
726         }
727         if (qi->qi_gquotaip) {
728                 IRELE(qi->qi_gquotaip);
729                 qi->qi_gquotaip = NULL;
730         }
731         if (qi->qi_pquotaip) {
732                 IRELE(qi->qi_pquotaip);
733                 qi->qi_pquotaip = NULL;
734         }
735         mutex_destroy(&qi->qi_quotaofflock);
736         kmem_free(qi);
737         mp->m_quotainfo = NULL;
738 }
739
740 /*
741  * Create an inode and return with a reference already taken, but unlocked
742  * This is how we create quota inodes
743  */
744 STATIC int
745 xfs_qm_qino_alloc(
746         xfs_mount_t     *mp,
747         xfs_inode_t     **ip,
748         uint            flags)
749 {
750         xfs_trans_t     *tp;
751         int             error;
752         int             committed;
753         bool            need_alloc = true;
754
755         *ip = NULL;
756         /*
757          * With superblock that doesn't have separate pquotino, we
758          * share an inode between gquota and pquota. If the on-disk
759          * superblock has GQUOTA and the filesystem is now mounted
760          * with PQUOTA, just use sb_gquotino for sb_pquotino and
761          * vice-versa.
762          */
763         if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
764                         (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
765                 xfs_ino_t ino = NULLFSINO;
766
767                 if ((flags & XFS_QMOPT_PQUOTA) &&
768                              (mp->m_sb.sb_gquotino != NULLFSINO)) {
769                         ino = mp->m_sb.sb_gquotino;
770                         ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
771                 } else if ((flags & XFS_QMOPT_GQUOTA) &&
772                              (mp->m_sb.sb_pquotino != NULLFSINO)) {
773                         ino = mp->m_sb.sb_pquotino;
774                         ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
775                 }
776                 if (ino != NULLFSINO) {
777                         error = xfs_iget(mp, NULL, ino, 0, 0, ip);
778                         if (error)
779                                 return error;
780                         mp->m_sb.sb_gquotino = NULLFSINO;
781                         mp->m_sb.sb_pquotino = NULLFSINO;
782                         need_alloc = false;
783                 }
784         }
785
786         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
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 = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
855         do_div(j, 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
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
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
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 STATIC int
1121 xfs_qm_get_rtblks(
1122         xfs_inode_t     *ip,
1123         xfs_qcnt_t      *O_rtblks)
1124 {
1125         xfs_filblks_t   rtblks;                 /* total rt blks */
1126         xfs_extnum_t    idx;                    /* extent record index */
1127         xfs_ifork_t     *ifp;                   /* inode fork pointer */
1128         xfs_extnum_t    nextents;               /* number of extent entries */
1129         int             error;
1130
1131         ASSERT(XFS_IS_REALTIME_INODE(ip));
1132         ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1133         if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1134                 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1135                         return error;
1136         }
1137         rtblks = 0;
1138         nextents = xfs_iext_count(ifp);
1139         for (idx = 0; idx < nextents; idx++)
1140                 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1141         *O_rtblks = (xfs_qcnt_t)rtblks;
1142         return 0;
1143 }
1144
1145 /*
1146  * callback routine supplied to bulkstat(). Given an inumber, find its
1147  * dquots and update them to account for resources taken by that inode.
1148  */
1149 /* ARGSUSED */
1150 STATIC int
1151 xfs_qm_dqusage_adjust(
1152         xfs_mount_t     *mp,            /* mount point for filesystem */
1153         xfs_ino_t       ino,            /* inode number to get data for */
1154         void            __user *buffer, /* not used */
1155         int             ubsize,         /* not used */
1156         int             *ubused,        /* not used */
1157         int             *res)           /* result code value */
1158 {
1159         xfs_inode_t     *ip;
1160         xfs_qcnt_t      nblks, rtblks = 0;
1161         int             error;
1162
1163         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1164
1165         /*
1166          * rootino must have its resources accounted for, not so with the quota
1167          * inodes.
1168          */
1169         if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1170                 *res = BULKSTAT_RV_NOTHING;
1171                 return -EINVAL;
1172         }
1173
1174         /*
1175          * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1176          * interface expects the inode to be exclusively locked because that's
1177          * the case in all other instances. It's OK that we do this because
1178          * quotacheck is done only at mount time.
1179          */
1180         error = xfs_iget(mp, NULL, ino, XFS_IGET_DONTCACHE, XFS_ILOCK_EXCL,
1181                          &ip);
1182         if (error) {
1183                 *res = BULKSTAT_RV_NOTHING;
1184                 return error;
1185         }
1186
1187         ASSERT(ip->i_delayed_blks == 0);
1188
1189         if (XFS_IS_REALTIME_INODE(ip)) {
1190                 /*
1191                  * Walk thru the extent list and count the realtime blocks.
1192                  */
1193                 error = xfs_qm_get_rtblks(ip, &rtblks);
1194                 if (error)
1195                         goto error0;
1196         }
1197
1198         nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1199
1200         /*
1201          * Add the (disk blocks and inode) resources occupied by this
1202          * inode to its dquots. We do this adjustment in the incore dquot,
1203          * and also copy the changes to its buffer.
1204          * We don't care about putting these changes in a transaction
1205          * envelope because if we crash in the middle of a 'quotacheck'
1206          * we have to start from the beginning anyway.
1207          * Once we're done, we'll log all the dquot bufs.
1208          *
1209          * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1210          * and quotaoffs don't race. (Quotachecks happen at mount time only).
1211          */
1212         if (XFS_IS_UQUOTA_ON(mp)) {
1213                 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1214                                                    XFS_DQ_USER, nblks, rtblks);
1215                 if (error)
1216                         goto error0;
1217         }
1218
1219         if (XFS_IS_GQUOTA_ON(mp)) {
1220                 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1221                                                    XFS_DQ_GROUP, nblks, rtblks);
1222                 if (error)
1223                         goto error0;
1224         }
1225
1226         if (XFS_IS_PQUOTA_ON(mp)) {
1227                 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1228                                                    XFS_DQ_PROJ, nblks, rtblks);
1229                 if (error)
1230                         goto error0;
1231         }
1232
1233         xfs_iunlock(ip, XFS_ILOCK_EXCL);
1234         IRELE(ip);
1235         *res = BULKSTAT_RV_DIDONE;
1236         return 0;
1237
1238 error0:
1239         xfs_iunlock(ip, XFS_ILOCK_EXCL);
1240         IRELE(ip);
1241         *res = BULKSTAT_RV_GIVEUP;
1242         return error;
1243 }
1244
1245 STATIC int
1246 xfs_qm_flush_one(
1247         struct xfs_dquot        *dqp,
1248         void                    *data)
1249 {
1250         struct list_head        *buffer_list = data;
1251         struct xfs_buf          *bp = NULL;
1252         int                     error = 0;
1253
1254         xfs_dqlock(dqp);
1255         if (dqp->dq_flags & XFS_DQ_FREEING)
1256                 goto out_unlock;
1257         if (!XFS_DQ_IS_DIRTY(dqp))
1258                 goto out_unlock;
1259
1260         xfs_dqflock(dqp);
1261         error = xfs_qm_dqflush(dqp, &bp);
1262         if (error)
1263                 goto out_unlock;
1264
1265         xfs_buf_delwri_queue(bp, buffer_list);
1266         xfs_buf_relse(bp);
1267 out_unlock:
1268         xfs_dqunlock(dqp);
1269         return error;
1270 }
1271
1272 /*
1273  * Walk thru all the filesystem inodes and construct a consistent view
1274  * of the disk quota world. If the quotacheck fails, disable quotas.
1275  */
1276 STATIC int
1277 xfs_qm_quotacheck(
1278         xfs_mount_t     *mp)
1279 {
1280         int                     done, count, error, error2;
1281         xfs_ino_t               lastino;
1282         size_t                  structsz;
1283         uint                    flags;
1284         LIST_HEAD               (buffer_list);
1285         struct xfs_inode        *uip = mp->m_quotainfo->qi_uquotaip;
1286         struct xfs_inode        *gip = mp->m_quotainfo->qi_gquotaip;
1287         struct xfs_inode        *pip = mp->m_quotainfo->qi_pquotaip;
1288
1289         count = INT_MAX;
1290         structsz = 1;
1291         lastino = 0;
1292         flags = 0;
1293
1294         ASSERT(uip || gip || pip);
1295         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1296
1297         xfs_notice(mp, "Quotacheck needed: Please wait.");
1298
1299         /*
1300          * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1301          * their counters to zero. We need a clean slate.
1302          * We don't log our changes till later.
1303          */
1304         if (uip) {
1305                 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1306                                          &buffer_list);
1307                 if (error)
1308                         goto error_return;
1309                 flags |= XFS_UQUOTA_CHKD;
1310         }
1311
1312         if (gip) {
1313                 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1314                                          &buffer_list);
1315                 if (error)
1316                         goto error_return;
1317                 flags |= XFS_GQUOTA_CHKD;
1318         }
1319
1320         if (pip) {
1321                 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1322                                          &buffer_list);
1323                 if (error)
1324                         goto error_return;
1325                 flags |= XFS_PQUOTA_CHKD;
1326         }
1327
1328         do {
1329                 /*
1330                  * Iterate thru all the inodes in the file system,
1331                  * adjusting the corresponding dquot counters in core.
1332                  */
1333                 error = xfs_bulkstat(mp, &lastino, &count,
1334                                      xfs_qm_dqusage_adjust,
1335                                      structsz, NULL, &done);
1336                 if (error)
1337                         break;
1338
1339         } while (!done);
1340
1341         /*
1342          * We've made all the changes that we need to make incore.  Flush them
1343          * down to disk buffers if everything was updated successfully.
1344          */
1345         if (XFS_IS_UQUOTA_ON(mp)) {
1346                 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1347                                           &buffer_list);
1348         }
1349         if (XFS_IS_GQUOTA_ON(mp)) {
1350                 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1351                                            &buffer_list);
1352                 if (!error)
1353                         error = error2;
1354         }
1355         if (XFS_IS_PQUOTA_ON(mp)) {
1356                 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1357                                            &buffer_list);
1358                 if (!error)
1359                         error = error2;
1360         }
1361
1362         error2 = xfs_buf_delwri_submit(&buffer_list);
1363         if (!error)
1364                 error = error2;
1365
1366         /*
1367          * We can get this error if we couldn't do a dquot allocation inside
1368          * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1369          * dirty dquots that might be cached, we just want to get rid of them
1370          * and turn quotaoff. The dquots won't be attached to any of the inodes
1371          * at this point (because we intentionally didn't in dqget_noattach).
1372          */
1373         if (error) {
1374                 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1375                 goto error_return;
1376         }
1377
1378         /*
1379          * If one type of quotas is off, then it will lose its
1380          * quotachecked status, since we won't be doing accounting for
1381          * that type anymore.
1382          */
1383         mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1384         mp->m_qflags |= flags;
1385
1386  error_return:
1387         while (!list_empty(&buffer_list)) {
1388                 struct xfs_buf *bp =
1389                         list_first_entry(&buffer_list, struct xfs_buf, b_list);
1390                 list_del_init(&bp->b_list);
1391                 xfs_buf_relse(bp);
1392         }
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
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
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
1599 xfs_qm_dqfree_one(
1600         struct xfs_dquot        *dqp)
1601 {
1602         struct xfs_mount        *mp = dqp->q_mount;
1603         struct xfs_quotainfo    *qi = mp->m_quotainfo;
1604
1605         mutex_lock(&qi->qi_tree_lock);
1606         radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1607                           be32_to_cpu(dqp->q_core.d_id));
1608
1609         qi->qi_dquots--;
1610         mutex_unlock(&qi->qi_tree_lock);
1611
1612         xfs_qm_dqdestroy(dqp);
1613 }
1614
1615 /* --------------- utility functions for vnodeops ---------------- */
1616
1617
1618 /*
1619  * Given an inode, a uid, gid and prid make sure that we have
1620  * allocated relevant dquot(s) on disk, and that we won't exceed inode
1621  * quotas by creating this file.
1622  * This also attaches dquot(s) to the given inode after locking it,
1623  * and returns the dquots corresponding to the uid and/or gid.
1624  *
1625  * in   : inode (unlocked)
1626  * out  : udquot, gdquot with references taken and unlocked
1627  */
1628 int
1629 xfs_qm_vop_dqalloc(
1630         struct xfs_inode        *ip,
1631         xfs_dqid_t              uid,
1632         xfs_dqid_t              gid,
1633         prid_t                  prid,
1634         uint                    flags,
1635         struct xfs_dquot        **O_udqpp,
1636         struct xfs_dquot        **O_gdqpp,
1637         struct xfs_dquot        **O_pdqpp)
1638 {
1639         struct xfs_mount        *mp = ip->i_mount;
1640         struct xfs_dquot        *uq = NULL;
1641         struct xfs_dquot        *gq = NULL;
1642         struct xfs_dquot        *pq = NULL;
1643         int                     error;
1644         uint                    lockflags;
1645
1646         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1647                 return 0;
1648
1649         lockflags = XFS_ILOCK_EXCL;
1650         xfs_ilock(ip, lockflags);
1651
1652         if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1653                 gid = ip->i_d.di_gid;
1654
1655         /*
1656          * Attach the dquot(s) to this inode, doing a dquot allocation
1657          * if necessary. The dquot(s) will not be locked.
1658          */
1659         if (XFS_NOT_DQATTACHED(mp, ip)) {
1660                 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1661                 if (error) {
1662                         xfs_iunlock(ip, lockflags);
1663                         return error;
1664                 }
1665         }
1666
1667         if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1668                 if (ip->i_d.di_uid != uid) {
1669                         /*
1670                          * What we need is the dquot that has this uid, and
1671                          * if we send the inode to dqget, the uid of the inode
1672                          * takes priority over what's sent in the uid argument.
1673                          * We must unlock inode here before calling dqget if
1674                          * we're not sending the inode, because otherwise
1675                          * we'll deadlock by doing trans_reserve while
1676                          * holding ilock.
1677                          */
1678                         xfs_iunlock(ip, lockflags);
1679                         error = xfs_qm_dqget(mp, NULL, uid,
1680                                                  XFS_DQ_USER,
1681                                                  XFS_QMOPT_DQALLOC |
1682                                                  XFS_QMOPT_DOWARN,
1683                                                  &uq);
1684                         if (error) {
1685                                 ASSERT(error != -ENOENT);
1686                                 return error;
1687                         }
1688                         /*
1689                          * Get the ilock in the right order.
1690                          */
1691                         xfs_dqunlock(uq);
1692                         lockflags = XFS_ILOCK_SHARED;
1693                         xfs_ilock(ip, lockflags);
1694                 } else {
1695                         /*
1696                          * Take an extra reference, because we'll return
1697                          * this to caller
1698                          */
1699                         ASSERT(ip->i_udquot);
1700                         uq = xfs_qm_dqhold(ip->i_udquot);
1701                 }
1702         }
1703         if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1704                 if (ip->i_d.di_gid != gid) {
1705                         xfs_iunlock(ip, lockflags);
1706                         error = xfs_qm_dqget(mp, NULL, gid,
1707                                                  XFS_DQ_GROUP,
1708                                                  XFS_QMOPT_DQALLOC |
1709                                                  XFS_QMOPT_DOWARN,
1710                                                  &gq);
1711                         if (error) {
1712                                 ASSERT(error != -ENOENT);
1713                                 goto error_rele;
1714                         }
1715                         xfs_dqunlock(gq);
1716                         lockflags = XFS_ILOCK_SHARED;
1717                         xfs_ilock(ip, lockflags);
1718                 } else {
1719                         ASSERT(ip->i_gdquot);
1720                         gq = xfs_qm_dqhold(ip->i_gdquot);
1721                 }
1722         }
1723         if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1724                 if (xfs_get_projid(ip) != prid) {
1725                         xfs_iunlock(ip, lockflags);
1726                         error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1727                                                  XFS_DQ_PROJ,
1728                                                  XFS_QMOPT_DQALLOC |
1729                                                  XFS_QMOPT_DOWARN,
1730                                                  &pq);
1731                         if (error) {
1732                                 ASSERT(error != -ENOENT);
1733                                 goto error_rele;
1734                         }
1735                         xfs_dqunlock(pq);
1736                         lockflags = XFS_ILOCK_SHARED;
1737                         xfs_ilock(ip, lockflags);
1738                 } else {
1739                         ASSERT(ip->i_pdquot);
1740                         pq = xfs_qm_dqhold(ip->i_pdquot);
1741                 }
1742         }
1743         if (uq)
1744                 trace_xfs_dquot_dqalloc(ip);
1745
1746         xfs_iunlock(ip, lockflags);
1747         if (O_udqpp)
1748                 *O_udqpp = uq;
1749         else
1750                 xfs_qm_dqrele(uq);
1751         if (O_gdqpp)
1752                 *O_gdqpp = gq;
1753         else
1754                 xfs_qm_dqrele(gq);
1755         if (O_pdqpp)
1756                 *O_pdqpp = pq;
1757         else
1758                 xfs_qm_dqrele(pq);
1759         return 0;
1760
1761 error_rele:
1762         xfs_qm_dqrele(gq);
1763         xfs_qm_dqrele(uq);
1764         return error;
1765 }
1766
1767 /*
1768  * Actually transfer ownership, and do dquot modifications.
1769  * These were already reserved.
1770  */
1771 xfs_dquot_t *
1772 xfs_qm_vop_chown(
1773         xfs_trans_t     *tp,
1774         xfs_inode_t     *ip,
1775         xfs_dquot_t     **IO_olddq,
1776         xfs_dquot_t     *newdq)
1777 {
1778         xfs_dquot_t     *prevdq;
1779         uint            bfield = XFS_IS_REALTIME_INODE(ip) ?
1780                                  XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1781
1782
1783         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1784         ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1785
1786         /* old dquot */
1787         prevdq = *IO_olddq;
1788         ASSERT(prevdq);
1789         ASSERT(prevdq != newdq);
1790
1791         xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1792         xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1793
1794         /* the sparkling new dquot */
1795         xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1796         xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1797
1798         /*
1799          * Take an extra reference, because the inode is going to keep
1800          * this dquot pointer even after the trans_commit.
1801          */
1802         *IO_olddq = xfs_qm_dqhold(newdq);
1803
1804         return prevdq;
1805 }
1806
1807 /*
1808  * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1809  */
1810 int
1811 xfs_qm_vop_chown_reserve(
1812         struct xfs_trans        *tp,
1813         struct xfs_inode        *ip,
1814         struct xfs_dquot        *udqp,
1815         struct xfs_dquot        *gdqp,
1816         struct xfs_dquot        *pdqp,
1817         uint                    flags)
1818 {
1819         struct xfs_mount        *mp = ip->i_mount;
1820         uint                    delblks, blkflags, prjflags = 0;
1821         struct xfs_dquot        *udq_unres = NULL;
1822         struct xfs_dquot        *gdq_unres = NULL;
1823         struct xfs_dquot        *pdq_unres = NULL;
1824         struct xfs_dquot        *udq_delblks = NULL;
1825         struct xfs_dquot        *gdq_delblks = NULL;
1826         struct xfs_dquot        *pdq_delblks = NULL;
1827         int                     error;
1828
1829
1830         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1831         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1832
1833         delblks = ip->i_delayed_blks;
1834         blkflags = XFS_IS_REALTIME_INODE(ip) ?
1835                         XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1836
1837         if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1838             ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
1839                 udq_delblks = udqp;
1840                 /*
1841                  * If there are delayed allocation blocks, then we have to
1842                  * unreserve those from the old dquot, and add them to the
1843                  * new dquot.
1844                  */
1845                 if (delblks) {
1846                         ASSERT(ip->i_udquot);
1847                         udq_unres = ip->i_udquot;
1848                 }
1849         }
1850         if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1851             ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1852                 gdq_delblks = gdqp;
1853                 if (delblks) {
1854                         ASSERT(ip->i_gdquot);
1855                         gdq_unres = ip->i_gdquot;
1856                 }
1857         }
1858
1859         if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1860             xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
1861                 prjflags = XFS_QMOPT_ENOSPC;
1862                 pdq_delblks = pdqp;
1863                 if (delblks) {
1864                         ASSERT(ip->i_pdquot);
1865                         pdq_unres = ip->i_pdquot;
1866                 }
1867         }
1868
1869         error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1870                                 udq_delblks, gdq_delblks, pdq_delblks,
1871                                 ip->i_d.di_nblocks, 1,
1872                                 flags | blkflags | prjflags);
1873         if (error)
1874                 return error;
1875
1876         /*
1877          * Do the delayed blks reservations/unreservations now. Since, these
1878          * are done without the help of a transaction, if a reservation fails
1879          * its previous reservations won't be automatically undone by trans
1880          * code. So, we have to do it manually here.
1881          */
1882         if (delblks) {
1883                 /*
1884                  * Do the reservations first. Unreservation can't fail.
1885                  */
1886                 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
1887                 ASSERT(udq_unres || gdq_unres || pdq_unres);
1888                 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1889                             udq_delblks, gdq_delblks, pdq_delblks,
1890                             (xfs_qcnt_t)delblks, 0,
1891                             flags | blkflags | prjflags);
1892                 if (error)
1893                         return error;
1894                 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1895                                 udq_unres, gdq_unres, pdq_unres,
1896                                 -((xfs_qcnt_t)delblks), 0, blkflags);
1897         }
1898
1899         return 0;
1900 }
1901
1902 int
1903 xfs_qm_vop_rename_dqattach(
1904         struct xfs_inode        **i_tab)
1905 {
1906         struct xfs_mount        *mp = i_tab[0]->i_mount;
1907         int                     i;
1908
1909         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1910                 return 0;
1911
1912         for (i = 0; (i < 4 && i_tab[i]); i++) {
1913                 struct xfs_inode        *ip = i_tab[i];
1914                 int                     error;
1915
1916                 /*
1917                  * Watch out for duplicate entries in the table.
1918                  */
1919                 if (i == 0 || ip != i_tab[i-1]) {
1920                         if (XFS_NOT_DQATTACHED(mp, ip)) {
1921                                 error = xfs_qm_dqattach(ip, 0);
1922                                 if (error)
1923                                         return error;
1924                         }
1925                 }
1926         }
1927         return 0;
1928 }
1929
1930 void
1931 xfs_qm_vop_create_dqattach(
1932         struct xfs_trans        *tp,
1933         struct xfs_inode        *ip,
1934         struct xfs_dquot        *udqp,
1935         struct xfs_dquot        *gdqp,
1936         struct xfs_dquot        *pdqp)
1937 {
1938         struct xfs_mount        *mp = tp->t_mountp;
1939
1940         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1941                 return;
1942
1943         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1944         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1945
1946         if (udqp && XFS_IS_UQUOTA_ON(mp)) {
1947                 ASSERT(ip->i_udquot == NULL);
1948                 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
1949
1950                 ip->i_udquot = xfs_qm_dqhold(udqp);
1951                 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1952         }
1953         if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
1954                 ASSERT(ip->i_gdquot == NULL);
1955                 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
1956                 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1957                 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1958         }
1959         if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
1960                 ASSERT(ip->i_pdquot == NULL);
1961                 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
1962
1963                 ip->i_pdquot = xfs_qm_dqhold(pdqp);
1964                 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
1965         }
1966 }
1967