2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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.
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.
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
22 #include "xfs_trans.h"
25 #include "xfs_alloc.h"
26 #include "xfs_quota.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_ialloc_btree.h"
30 #include "xfs_dinode.h"
31 #include "xfs_inode.h"
32 #include "xfs_ialloc.h"
33 #include "xfs_itable.h"
34 #include "xfs_rtalloc.h"
35 #include "xfs_error.h"
38 #include "xfs_buf_item.h"
39 #include "xfs_trans_space.h"
40 #include "xfs_utils.h"
42 #include "xfs_trace.h"
45 * The global quota manager. There is only one of these for the entire
46 * system, _not_ one per file system. XQM keeps track of the overall
47 * quota functionality, including maintaining the freelist and hash
50 STATIC
int xfs_qm_init_quotainos(xfs_mount_t
*);
51 STATIC
int xfs_qm_init_quotainfo(xfs_mount_t
*);
52 STATIC
int xfs_qm_shake(struct shrinker
*, struct shrink_control
*);
55 * We use the batch lookup interface to iterate over the dquots as it
56 * currently is the only interface into the radix tree code that allows
57 * fuzzy lookups instead of exact matches. Holding the lock over multiple
58 * operations is fine as all callers are used either during mount/umount
61 #define XFS_DQ_LOOKUP_BATCH 32
67 int (*execute
)(struct xfs_dquot
*dqp
, void *data
),
70 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
71 struct radix_tree_root
*tree
= XFS_DQUOT_TREE(qi
, type
);
83 struct xfs_dquot
*batch
[XFS_DQ_LOOKUP_BATCH
];
87 mutex_lock(&qi
->qi_tree_lock
);
88 nr_found
= radix_tree_gang_lookup(tree
, (void **)batch
,
89 next_index
, XFS_DQ_LOOKUP_BATCH
);
91 mutex_unlock(&qi
->qi_tree_lock
);
95 for (i
= 0; i
< nr_found
; i
++) {
96 struct xfs_dquot
*dqp
= batch
[i
];
98 next_index
= be32_to_cpu(dqp
->q_core
.d_id
) + 1;
100 error
= execute(batch
[i
], data
);
101 if (error
== EAGAIN
) {
105 if (error
&& last_error
!= EFSCORRUPTED
)
109 mutex_unlock(&qi
->qi_tree_lock
);
111 /* bail out if the filesystem is corrupted. */
112 if (last_error
== EFSCORRUPTED
) {
128 * Purge a dquot from all tracking data structures and free it.
132 struct xfs_dquot
*dqp
,
135 struct xfs_mount
*mp
= dqp
->q_mount
;
136 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
137 struct xfs_dquot
*gdqp
= NULL
;
140 if ((dqp
->dq_flags
& XFS_DQ_FREEING
) || dqp
->q_nrefs
!= 0) {
146 * If this quota has a group hint attached, prepare for releasing it
149 gdqp
= dqp
->q_gdquot
;
152 dqp
->q_gdquot
= NULL
;
155 dqp
->dq_flags
|= XFS_DQ_FREEING
;
160 * If we are turning this type of quotas off, we don't care
161 * about the dirty metadata sitting in this dquot. OTOH, if
162 * we're unmounting, we do care, so we flush it and wait.
164 if (XFS_DQ_IS_DIRTY(dqp
)) {
165 struct xfs_buf
*bp
= NULL
;
169 * We don't care about getting disk errors here. We need
170 * to purge this dquot anyway, so we go ahead regardless.
172 error
= xfs_qm_dqflush(dqp
, &bp
);
174 xfs_warn(mp
, "%s: dquot %p flush failed",
177 error
= xfs_bwrite(bp
);
183 ASSERT(atomic_read(&dqp
->q_pincount
) == 0);
184 ASSERT(XFS_FORCED_SHUTDOWN(mp
) ||
185 !(dqp
->q_logitem
.qli_item
.li_flags
& XFS_LI_IN_AIL
));
190 radix_tree_delete(XFS_DQUOT_TREE(qi
, dqp
->q_core
.d_flags
),
191 be32_to_cpu(dqp
->q_core
.d_id
));
195 * We move dquots to the freelist as soon as their reference count
196 * hits zero, so it really should be on the freelist here.
198 mutex_lock(&qi
->qi_lru_lock
);
199 ASSERT(!list_empty(&dqp
->q_lru
));
200 list_del_init(&dqp
->q_lru
);
202 XFS_STATS_DEC(xs_qm_dquot_unused
);
203 mutex_unlock(&qi
->qi_lru_lock
);
205 xfs_qm_dqdestroy(dqp
);
213 * Purge the dquot cache.
217 struct xfs_mount
*mp
,
220 if (flags
& XFS_QMOPT_UQUOTA
)
221 xfs_qm_dquot_walk(mp
, XFS_DQ_USER
, xfs_qm_dqpurge
, NULL
);
222 if (flags
& XFS_QMOPT_GQUOTA
)
223 xfs_qm_dquot_walk(mp
, XFS_DQ_GROUP
, xfs_qm_dqpurge
, NULL
);
224 if (flags
& XFS_QMOPT_PQUOTA
)
225 xfs_qm_dquot_walk(mp
, XFS_DQ_PROJ
, xfs_qm_dqpurge
, NULL
);
229 * Just destroy the quotainfo structure.
233 struct xfs_mount
*mp
)
235 if (mp
->m_quotainfo
) {
236 xfs_qm_dqpurge_all(mp
, XFS_QMOPT_QUOTALL
);
237 xfs_qm_destroy_quotainfo(mp
);
243 * This is called from xfs_mountfs to start quotas and initialize all
244 * necessary data structures like quotainfo. This is also responsible for
245 * running a quotacheck as necessary. We are guaranteed that the superblock
246 * is consistently read in at this point.
248 * If we fail here, the mount will continue with quota turned off. We don't
249 * need to inidicate success or failure at all.
259 * If quotas on realtime volumes is not supported, we disable
260 * quotas immediately.
262 if (mp
->m_sb
.sb_rextents
) {
263 xfs_notice(mp
, "Cannot turn on quotas for realtime filesystem");
268 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
271 * Allocate the quotainfo structure inside the mount struct, and
272 * create quotainode(s), and change/rev superblock if necessary.
274 error
= xfs_qm_init_quotainfo(mp
);
277 * We must turn off quotas.
279 ASSERT(mp
->m_quotainfo
== NULL
);
284 * If any of the quotas are not consistent, do a quotacheck.
286 if (XFS_QM_NEED_QUOTACHECK(mp
)) {
287 error
= xfs_qm_quotacheck(mp
);
289 /* Quotacheck failed and disabled quotas. */
294 * If one type of quotas is off, then it will lose its
295 * quotachecked status, since we won't be doing accounting for
298 if (!XFS_IS_UQUOTA_ON(mp
))
299 mp
->m_qflags
&= ~XFS_UQUOTA_CHKD
;
300 if (!(XFS_IS_GQUOTA_ON(mp
) || XFS_IS_PQUOTA_ON(mp
)))
301 mp
->m_qflags
&= ~XFS_OQUOTA_CHKD
;
305 * We actually don't have to acquire the m_sb_lock at all.
306 * This can only be called from mount, and that's single threaded. XXX
308 spin_lock(&mp
->m_sb_lock
);
309 sbf
= mp
->m_sb
.sb_qflags
;
310 mp
->m_sb
.sb_qflags
= mp
->m_qflags
& XFS_MOUNT_QUOTA_ALL
;
311 spin_unlock(&mp
->m_sb_lock
);
313 if (sbf
!= (mp
->m_qflags
& XFS_MOUNT_QUOTA_ALL
)) {
314 if (xfs_qm_write_sb_changes(mp
, XFS_SB_QFLAGS
)) {
316 * We could only have been turning quotas off.
317 * We aren't in very good shape actually because
318 * the incore structures are convinced that quotas are
319 * off, but the on disk superblock doesn't know that !
321 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp
)));
322 xfs_alert(mp
, "%s: Superblock update failed!",
328 xfs_warn(mp
, "Failed to initialize disk quotas.");
334 * Called from the vfsops layer.
337 xfs_qm_unmount_quotas(
341 * Release the dquots that root inode, et al might be holding,
342 * before we flush quotas and blow away the quotainfo structure.
344 ASSERT(mp
->m_rootip
);
345 xfs_qm_dqdetach(mp
->m_rootip
);
347 xfs_qm_dqdetach(mp
->m_rbmip
);
349 xfs_qm_dqdetach(mp
->m_rsumip
);
352 * Release the quota inodes.
354 if (mp
->m_quotainfo
) {
355 if (mp
->m_quotainfo
->qi_uquotaip
) {
356 IRELE(mp
->m_quotainfo
->qi_uquotaip
);
357 mp
->m_quotainfo
->qi_uquotaip
= NULL
;
359 if (mp
->m_quotainfo
->qi_gquotaip
) {
360 IRELE(mp
->m_quotainfo
->qi_gquotaip
);
361 mp
->m_quotainfo
->qi_gquotaip
= NULL
;
372 xfs_dquot_t
*udqhint
, /* hint */
373 xfs_dquot_t
**IO_idqpp
)
378 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
382 * See if we already have it in the inode itself. IO_idqpp is
383 * &i_udquot or &i_gdquot. This made the code look weird, but
384 * made the logic a lot simpler.
388 trace_xfs_dqattach_found(dqp
);
393 * udqhint is the i_udquot field in inode, and is non-NULL only
394 * when the type arg is group/project. Its purpose is to save a
395 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
399 ASSERT(type
== XFS_DQ_GROUP
|| type
== XFS_DQ_PROJ
);
403 * No need to take dqlock to look at the id.
405 * The ID can't change until it gets reclaimed, and it won't
406 * be reclaimed as long as we have a ref from inode and we
409 dqp
= udqhint
->q_gdquot
;
410 if (dqp
&& be32_to_cpu(dqp
->q_core
.d_id
) == id
) {
411 ASSERT(*IO_idqpp
== NULL
);
413 *IO_idqpp
= xfs_qm_dqhold(dqp
);
414 xfs_dqunlock(udqhint
);
419 * We can't hold a dquot lock when we call the dqget code.
420 * We'll deadlock in no time, because of (not conforming to)
421 * lock ordering - the inodelock comes before any dquot lock,
422 * and we may drop and reacquire the ilock in xfs_qm_dqget().
424 xfs_dqunlock(udqhint
);
428 * Find the dquot from somewhere. This bumps the
429 * reference count of dquot and returns it locked.
430 * This can return ENOENT if dquot didn't exist on
431 * disk and we didn't ask it to allocate;
432 * ESRCH if quotas got turned off suddenly.
434 error
= xfs_qm_dqget(ip
->i_mount
, ip
, id
, type
,
435 doalloc
| XFS_QMOPT_DOWARN
, &dqp
);
439 trace_xfs_dqattach_get(dqp
);
442 * dqget may have dropped and re-acquired the ilock, but it guarantees
443 * that the dquot returned is the one that should go in the inode.
452 * Given a udquot and gdquot, attach a ptr to the group dquot in the
453 * udquot as a hint for future lookups.
456 xfs_qm_dqattach_grouphint(
469 udq
->q_gdquot
= NULL
;
473 udq
->q_gdquot
= xfs_qm_dqhold(gdq
);
479 xfs_qm_need_dqattach(
480 struct xfs_inode
*ip
)
482 struct xfs_mount
*mp
= ip
->i_mount
;
484 if (!XFS_IS_QUOTA_RUNNING(mp
))
486 if (!XFS_IS_QUOTA_ON(mp
))
488 if (!XFS_NOT_DQATTACHED(mp
, ip
))
490 if (ip
->i_ino
== mp
->m_sb
.sb_uquotino
||
491 ip
->i_ino
== mp
->m_sb
.sb_gquotino
)
497 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
499 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
500 * Inode may get unlocked and relocked in here, and the caller must deal with
504 xfs_qm_dqattach_locked(
508 xfs_mount_t
*mp
= ip
->i_mount
;
512 if (!xfs_qm_need_dqattach(ip
))
515 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
517 if (XFS_IS_UQUOTA_ON(mp
)) {
518 error
= xfs_qm_dqattach_one(ip
, ip
->i_d
.di_uid
, XFS_DQ_USER
,
519 flags
& XFS_QMOPT_DQALLOC
,
520 NULL
, &ip
->i_udquot
);
526 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
527 if (XFS_IS_OQUOTA_ON(mp
)) {
528 error
= XFS_IS_GQUOTA_ON(mp
) ?
529 xfs_qm_dqattach_one(ip
, ip
->i_d
.di_gid
, XFS_DQ_GROUP
,
530 flags
& XFS_QMOPT_DQALLOC
,
531 ip
->i_udquot
, &ip
->i_gdquot
) :
532 xfs_qm_dqattach_one(ip
, xfs_get_projid(ip
), XFS_DQ_PROJ
,
533 flags
& XFS_QMOPT_DQALLOC
,
534 ip
->i_udquot
, &ip
->i_gdquot
);
536 * Don't worry about the udquot that we may have
537 * attached above. It'll get detached, if not already.
545 * Attach this group quota to the user quota as a hint.
546 * This WON'T, in general, result in a thrash.
549 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
550 ASSERT(ip
->i_udquot
);
551 ASSERT(ip
->i_gdquot
);
554 * We do not have i_udquot locked at this point, but this check
555 * is OK since we don't depend on the i_gdquot to be accurate
556 * 100% all the time. It is just a hint, and this will
557 * succeed in general.
559 if (ip
->i_udquot
->q_gdquot
!= ip
->i_gdquot
)
560 xfs_qm_dqattach_grouphint(ip
->i_udquot
, ip
->i_gdquot
);
566 if (XFS_IS_UQUOTA_ON(mp
))
567 ASSERT(ip
->i_udquot
);
568 if (XFS_IS_OQUOTA_ON(mp
))
569 ASSERT(ip
->i_gdquot
);
571 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
578 struct xfs_inode
*ip
,
583 if (!xfs_qm_need_dqattach(ip
))
586 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
587 error
= xfs_qm_dqattach_locked(ip
, flags
);
588 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
594 * Release dquots (and their references) if any.
595 * The inode should be locked EXCL except when this's called by
602 if (!(ip
->i_udquot
|| ip
->i_gdquot
))
605 trace_xfs_dquot_dqdetach(ip
);
607 ASSERT(ip
->i_ino
!= ip
->i_mount
->m_sb
.sb_uquotino
);
608 ASSERT(ip
->i_ino
!= ip
->i_mount
->m_sb
.sb_gquotino
);
610 xfs_qm_dqrele(ip
->i_udquot
);
614 xfs_qm_dqrele(ip
->i_gdquot
);
620 * This initializes all the quota information that's kept in the
624 xfs_qm_init_quotainfo(
627 xfs_quotainfo_t
*qinf
;
631 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
633 qinf
= mp
->m_quotainfo
= kmem_zalloc(sizeof(xfs_quotainfo_t
), KM_SLEEP
);
636 * See if quotainodes are setup, and if not, allocate them,
637 * and change the superblock accordingly.
639 if ((error
= xfs_qm_init_quotainos(mp
))) {
641 mp
->m_quotainfo
= NULL
;
645 INIT_RADIX_TREE(&qinf
->qi_uquota_tree
, GFP_NOFS
);
646 INIT_RADIX_TREE(&qinf
->qi_gquota_tree
, GFP_NOFS
);
647 mutex_init(&qinf
->qi_tree_lock
);
649 INIT_LIST_HEAD(&qinf
->qi_lru_list
);
650 qinf
->qi_lru_count
= 0;
651 mutex_init(&qinf
->qi_lru_lock
);
653 /* mutex used to serialize quotaoffs */
654 mutex_init(&qinf
->qi_quotaofflock
);
656 /* Precalc some constants */
657 qinf
->qi_dqchunklen
= XFS_FSB_TO_BB(mp
, XFS_DQUOT_CLUSTER_SIZE_FSB
);
658 ASSERT(qinf
->qi_dqchunklen
);
659 qinf
->qi_dqperchunk
= BBTOB(qinf
->qi_dqchunklen
);
660 do_div(qinf
->qi_dqperchunk
, sizeof(xfs_dqblk_t
));
662 mp
->m_qflags
|= (mp
->m_sb
.sb_qflags
& XFS_ALL_QUOTA_CHKD
);
665 * We try to get the limits from the superuser's limits fields.
666 * This is quite hacky, but it is standard quota practice.
668 * We look at the USR dquot with id == 0 first, but if user quotas
669 * are not enabled we goto the GRP dquot with id == 0.
670 * We don't really care to keep separate default limits for user
671 * and group quotas, at least not at this point.
673 * Since we may not have done a quotacheck by this point, just read
674 * the dquot without attaching it to any hashtables or lists.
676 error
= xfs_qm_dqread(mp
, 0,
677 XFS_IS_UQUOTA_RUNNING(mp
) ? XFS_DQ_USER
:
678 (XFS_IS_GQUOTA_RUNNING(mp
) ? XFS_DQ_GROUP
:
680 XFS_QMOPT_DOWARN
, &dqp
);
682 xfs_disk_dquot_t
*ddqp
= &dqp
->q_core
;
685 * The warnings and timers set the grace period given to
686 * a user or group before he or she can not perform any
687 * more writing. If it is zero, a default is used.
689 qinf
->qi_btimelimit
= ddqp
->d_btimer
?
690 be32_to_cpu(ddqp
->d_btimer
) : XFS_QM_BTIMELIMIT
;
691 qinf
->qi_itimelimit
= ddqp
->d_itimer
?
692 be32_to_cpu(ddqp
->d_itimer
) : XFS_QM_ITIMELIMIT
;
693 qinf
->qi_rtbtimelimit
= ddqp
->d_rtbtimer
?
694 be32_to_cpu(ddqp
->d_rtbtimer
) : XFS_QM_RTBTIMELIMIT
;
695 qinf
->qi_bwarnlimit
= ddqp
->d_bwarns
?
696 be16_to_cpu(ddqp
->d_bwarns
) : XFS_QM_BWARNLIMIT
;
697 qinf
->qi_iwarnlimit
= ddqp
->d_iwarns
?
698 be16_to_cpu(ddqp
->d_iwarns
) : XFS_QM_IWARNLIMIT
;
699 qinf
->qi_rtbwarnlimit
= ddqp
->d_rtbwarns
?
700 be16_to_cpu(ddqp
->d_rtbwarns
) : XFS_QM_RTBWARNLIMIT
;
701 qinf
->qi_bhardlimit
= be64_to_cpu(ddqp
->d_blk_hardlimit
);
702 qinf
->qi_bsoftlimit
= be64_to_cpu(ddqp
->d_blk_softlimit
);
703 qinf
->qi_ihardlimit
= be64_to_cpu(ddqp
->d_ino_hardlimit
);
704 qinf
->qi_isoftlimit
= be64_to_cpu(ddqp
->d_ino_softlimit
);
705 qinf
->qi_rtbhardlimit
= be64_to_cpu(ddqp
->d_rtb_hardlimit
);
706 qinf
->qi_rtbsoftlimit
= be64_to_cpu(ddqp
->d_rtb_softlimit
);
708 xfs_qm_dqdestroy(dqp
);
710 qinf
->qi_btimelimit
= XFS_QM_BTIMELIMIT
;
711 qinf
->qi_itimelimit
= XFS_QM_ITIMELIMIT
;
712 qinf
->qi_rtbtimelimit
= XFS_QM_RTBTIMELIMIT
;
713 qinf
->qi_bwarnlimit
= XFS_QM_BWARNLIMIT
;
714 qinf
->qi_iwarnlimit
= XFS_QM_IWARNLIMIT
;
715 qinf
->qi_rtbwarnlimit
= XFS_QM_RTBWARNLIMIT
;
718 qinf
->qi_shrinker
.shrink
= xfs_qm_shake
;
719 qinf
->qi_shrinker
.seeks
= DEFAULT_SEEKS
;
720 register_shrinker(&qinf
->qi_shrinker
);
726 * Gets called when unmounting a filesystem or when all quotas get
728 * This purges the quota inodes, destroys locks and frees itself.
731 xfs_qm_destroy_quotainfo(
736 qi
= mp
->m_quotainfo
;
739 unregister_shrinker(&qi
->qi_shrinker
);
741 if (qi
->qi_uquotaip
) {
742 IRELE(qi
->qi_uquotaip
);
743 qi
->qi_uquotaip
= NULL
; /* paranoia */
745 if (qi
->qi_gquotaip
) {
746 IRELE(qi
->qi_gquotaip
);
747 qi
->qi_gquotaip
= NULL
;
749 mutex_destroy(&qi
->qi_quotaofflock
);
751 mp
->m_quotainfo
= NULL
;
755 * Create an inode and return with a reference already taken, but unlocked
756 * This is how we create quota inodes
769 tp
= xfs_trans_alloc(mp
, XFS_TRANS_QM_QINOCREATE
);
770 if ((error
= xfs_trans_reserve(tp
,
771 XFS_QM_QINOCREATE_SPACE_RES(mp
),
772 XFS_CREATE_LOG_RES(mp
), 0,
773 XFS_TRANS_PERM_LOG_RES
,
774 XFS_CREATE_LOG_COUNT
))) {
775 xfs_trans_cancel(tp
, 0);
779 error
= xfs_dir_ialloc(&tp
, NULL
, S_IFREG
, 1, 0, 0, 1, ip
, &committed
);
781 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
|
787 * Make the changes in the superblock, and log those too.
788 * sbfields arg may contain fields other than *QUOTINO;
789 * VERSIONNUM for example.
791 spin_lock(&mp
->m_sb_lock
);
792 if (flags
& XFS_QMOPT_SBVERSION
) {
793 ASSERT(!xfs_sb_version_hasquota(&mp
->m_sb
));
794 ASSERT((sbfields
& (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
795 XFS_SB_GQUOTINO
| XFS_SB_QFLAGS
)) ==
796 (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
797 XFS_SB_GQUOTINO
| XFS_SB_QFLAGS
));
799 xfs_sb_version_addquota(&mp
->m_sb
);
800 mp
->m_sb
.sb_uquotino
= NULLFSINO
;
801 mp
->m_sb
.sb_gquotino
= NULLFSINO
;
803 /* qflags will get updated _after_ quotacheck */
804 mp
->m_sb
.sb_qflags
= 0;
806 if (flags
& XFS_QMOPT_UQUOTA
)
807 mp
->m_sb
.sb_uquotino
= (*ip
)->i_ino
;
809 mp
->m_sb
.sb_gquotino
= (*ip
)->i_ino
;
810 spin_unlock(&mp
->m_sb_lock
);
811 xfs_mod_sb(tp
, sbfields
);
813 if ((error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
))) {
814 xfs_alert(mp
, "%s failed (error %d)!", __func__
, error
);
822 xfs_qm_reset_dqcounts(
828 xfs_disk_dquot_t
*ddq
;
831 trace_xfs_reset_dqcounts(bp
, _RET_IP_
);
834 * Reset all counters and timers. They'll be
835 * started afresh by xfs_qm_quotacheck.
838 j
= XFS_FSB_TO_B(mp
, XFS_DQUOT_CLUSTER_SIZE_FSB
);
839 do_div(j
, sizeof(xfs_dqblk_t
));
840 ASSERT(mp
->m_quotainfo
->qi_dqperchunk
== j
);
843 for (j
= 0; j
< mp
->m_quotainfo
->qi_dqperchunk
; j
++) {
845 * Do a sanity check, and if needed, repair the dqblk. Don't
846 * output any warnings because it's perfectly possible to
847 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
849 (void) xfs_qm_dqcheck(mp
, ddq
, id
+j
, type
, XFS_QMOPT_DQREPAIR
,
860 ddq
= (xfs_disk_dquot_t
*) ((xfs_dqblk_t
*)ddq
+ 1);
866 struct xfs_mount
*mp
,
869 xfs_filblks_t blkcnt
,
871 struct list_head
*buffer_list
)
878 type
= flags
& XFS_QMOPT_UQUOTA
? XFS_DQ_USER
:
879 (flags
& XFS_QMOPT_PQUOTA
? XFS_DQ_PROJ
: XFS_DQ_GROUP
);
883 * Blkcnt arg can be a very big number, and might even be
884 * larger than the log itself. So, we have to break it up into
885 * manageable-sized transactions.
886 * Note that we don't start a permanent transaction here; we might
887 * not be able to get a log reservation for the whole thing up front,
888 * and we don't really care to either, because we just discard
889 * everything if we were to crash in the middle of this loop.
892 error
= xfs_trans_read_buf(mp
, NULL
, mp
->m_ddev_targp
,
893 XFS_FSB_TO_DADDR(mp
, bno
),
894 mp
->m_quotainfo
->qi_dqchunklen
, 0, &bp
);
898 xfs_qm_reset_dqcounts(mp
, bp
, firstid
, type
);
899 xfs_buf_delwri_queue(bp
, buffer_list
);
902 * goto the next block.
905 firstid
+= mp
->m_quotainfo
->qi_dqperchunk
;
912 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
913 * caller supplied function for every chunk of dquots that we find.
917 struct xfs_mount
*mp
,
918 struct xfs_inode
*qip
,
920 struct list_head
*buffer_list
)
922 struct xfs_bmbt_irec
*map
;
923 int i
, nmaps
; /* number of map entries */
924 int error
; /* return value */
925 xfs_fileoff_t lblkno
;
926 xfs_filblks_t maxlblkcnt
;
928 xfs_fsblock_t rablkno
;
929 xfs_filblks_t rablkcnt
;
933 * This looks racy, but we can't keep an inode lock across a
934 * trans_reserve. But, this gets called during quotacheck, and that
935 * happens only at mount time which is single threaded.
937 if (qip
->i_d
.di_nblocks
== 0)
940 map
= kmem_alloc(XFS_DQITER_MAP_SIZE
* sizeof(*map
), KM_SLEEP
);
943 maxlblkcnt
= XFS_B_TO_FSB(mp
, mp
->m_super
->s_maxbytes
);
945 nmaps
= XFS_DQITER_MAP_SIZE
;
947 * We aren't changing the inode itself. Just changing
948 * some of its data. No new blocks are added here, and
949 * the inode is never added to the transaction.
951 xfs_ilock(qip
, XFS_ILOCK_SHARED
);
952 error
= xfs_bmapi_read(qip
, lblkno
, maxlblkcnt
- lblkno
,
954 xfs_iunlock(qip
, XFS_ILOCK_SHARED
);
958 ASSERT(nmaps
<= XFS_DQITER_MAP_SIZE
);
959 for (i
= 0; i
< nmaps
; i
++) {
960 ASSERT(map
[i
].br_startblock
!= DELAYSTARTBLOCK
);
961 ASSERT(map
[i
].br_blockcount
);
964 lblkno
+= map
[i
].br_blockcount
;
966 if (map
[i
].br_startblock
== HOLESTARTBLOCK
)
969 firstid
= (xfs_dqid_t
) map
[i
].br_startoff
*
970 mp
->m_quotainfo
->qi_dqperchunk
;
972 * Do a read-ahead on the next extent.
975 (map
[i
+1].br_startblock
!= HOLESTARTBLOCK
)) {
976 rablkcnt
= map
[i
+1].br_blockcount
;
977 rablkno
= map
[i
+1].br_startblock
;
979 xfs_buf_readahead(mp
->m_ddev_targp
,
980 XFS_FSB_TO_DADDR(mp
, rablkno
),
981 mp
->m_quotainfo
->qi_dqchunklen
);
986 * Iterate thru all the blks in the extent and
987 * reset the counters of all the dquots inside them.
989 error
= xfs_qm_dqiter_bufs(mp
, firstid
,
990 map
[i
].br_startblock
,
991 map
[i
].br_blockcount
,
1004 * Called by dqusage_adjust in doing a quotacheck.
1006 * Given the inode, and a dquot id this updates both the incore dqout as well
1007 * as the buffer copy. This is so that once the quotacheck is done, we can
1008 * just log all the buffers, as opposed to logging numerous updates to
1009 * individual dquots.
1012 xfs_qm_quotacheck_dqadjust(
1013 struct xfs_inode
*ip
,
1019 struct xfs_mount
*mp
= ip
->i_mount
;
1020 struct xfs_dquot
*dqp
;
1023 error
= xfs_qm_dqget(mp
, ip
, id
, type
,
1024 XFS_QMOPT_DQALLOC
| XFS_QMOPT_DOWARN
, &dqp
);
1027 * Shouldn't be able to turn off quotas here.
1029 ASSERT(error
!= ESRCH
);
1030 ASSERT(error
!= ENOENT
);
1034 trace_xfs_dqadjust(dqp
);
1037 * Adjust the inode count and the block count to reflect this inode's
1040 be64_add_cpu(&dqp
->q_core
.d_icount
, 1);
1041 dqp
->q_res_icount
++;
1043 be64_add_cpu(&dqp
->q_core
.d_bcount
, nblks
);
1044 dqp
->q_res_bcount
+= nblks
;
1047 be64_add_cpu(&dqp
->q_core
.d_rtbcount
, rtblks
);
1048 dqp
->q_res_rtbcount
+= rtblks
;
1052 * Set default limits, adjust timers (since we changed usages)
1054 * There are no timers for the default values set in the root dquot.
1056 if (dqp
->q_core
.d_id
) {
1057 xfs_qm_adjust_dqlimits(mp
, &dqp
->q_core
);
1058 xfs_qm_adjust_dqtimers(mp
, &dqp
->q_core
);
1061 dqp
->dq_flags
|= XFS_DQ_DIRTY
;
1069 xfs_qcnt_t
*O_rtblks
)
1071 xfs_filblks_t rtblks
; /* total rt blks */
1072 xfs_extnum_t idx
; /* extent record index */
1073 xfs_ifork_t
*ifp
; /* inode fork pointer */
1074 xfs_extnum_t nextents
; /* number of extent entries */
1077 ASSERT(XFS_IS_REALTIME_INODE(ip
));
1078 ifp
= XFS_IFORK_PTR(ip
, XFS_DATA_FORK
);
1079 if (!(ifp
->if_flags
& XFS_IFEXTENTS
)) {
1080 if ((error
= xfs_iread_extents(NULL
, ip
, XFS_DATA_FORK
)))
1084 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
1085 for (idx
= 0; idx
< nextents
; idx
++)
1086 rtblks
+= xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp
, idx
));
1087 *O_rtblks
= (xfs_qcnt_t
)rtblks
;
1092 * callback routine supplied to bulkstat(). Given an inumber, find its
1093 * dquots and update them to account for resources taken by that inode.
1097 xfs_qm_dqusage_adjust(
1098 xfs_mount_t
*mp
, /* mount point for filesystem */
1099 xfs_ino_t ino
, /* inode number to get data for */
1100 void __user
*buffer
, /* not used */
1101 int ubsize
, /* not used */
1102 int *ubused
, /* not used */
1103 int *res
) /* result code value */
1106 xfs_qcnt_t nblks
, rtblks
= 0;
1109 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1112 * rootino must have its resources accounted for, not so with the quota
1115 if (ino
== mp
->m_sb
.sb_uquotino
|| ino
== mp
->m_sb
.sb_gquotino
) {
1116 *res
= BULKSTAT_RV_NOTHING
;
1117 return XFS_ERROR(EINVAL
);
1121 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1122 * interface expects the inode to be exclusively locked because that's
1123 * the case in all other instances. It's OK that we do this because
1124 * quotacheck is done only at mount time.
1126 error
= xfs_iget(mp
, NULL
, ino
, 0, XFS_ILOCK_EXCL
, &ip
);
1128 *res
= BULKSTAT_RV_NOTHING
;
1132 ASSERT(ip
->i_delayed_blks
== 0);
1134 if (XFS_IS_REALTIME_INODE(ip
)) {
1136 * Walk thru the extent list and count the realtime blocks.
1138 error
= xfs_qm_get_rtblks(ip
, &rtblks
);
1143 nblks
= (xfs_qcnt_t
)ip
->i_d
.di_nblocks
- rtblks
;
1146 * Add the (disk blocks and inode) resources occupied by this
1147 * inode to its dquots. We do this adjustment in the incore dquot,
1148 * and also copy the changes to its buffer.
1149 * We don't care about putting these changes in a transaction
1150 * envelope because if we crash in the middle of a 'quotacheck'
1151 * we have to start from the beginning anyway.
1152 * Once we're done, we'll log all the dquot bufs.
1154 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1155 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1157 if (XFS_IS_UQUOTA_ON(mp
)) {
1158 error
= xfs_qm_quotacheck_dqadjust(ip
, ip
->i_d
.di_uid
,
1159 XFS_DQ_USER
, nblks
, rtblks
);
1164 if (XFS_IS_GQUOTA_ON(mp
)) {
1165 error
= xfs_qm_quotacheck_dqadjust(ip
, ip
->i_d
.di_gid
,
1166 XFS_DQ_GROUP
, nblks
, rtblks
);
1171 if (XFS_IS_PQUOTA_ON(mp
)) {
1172 error
= xfs_qm_quotacheck_dqadjust(ip
, xfs_get_projid(ip
),
1173 XFS_DQ_PROJ
, nblks
, rtblks
);
1178 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1180 *res
= BULKSTAT_RV_DIDONE
;
1184 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1186 *res
= BULKSTAT_RV_GIVEUP
;
1192 struct xfs_dquot
*dqp
,
1195 struct list_head
*buffer_list
= data
;
1196 struct xfs_buf
*bp
= NULL
;
1200 if (dqp
->dq_flags
& XFS_DQ_FREEING
)
1202 if (!XFS_DQ_IS_DIRTY(dqp
))
1206 error
= xfs_qm_dqflush(dqp
, &bp
);
1210 xfs_buf_delwri_queue(bp
, buffer_list
);
1218 * Walk thru all the filesystem inodes and construct a consistent view
1219 * of the disk quota world. If the quotacheck fails, disable quotas.
1225 int done
, count
, error
, error2
;
1228 xfs_inode_t
*uip
, *gip
;
1230 LIST_HEAD (buffer_list
);
1237 ASSERT(mp
->m_quotainfo
->qi_uquotaip
|| mp
->m_quotainfo
->qi_gquotaip
);
1238 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1240 xfs_notice(mp
, "Quotacheck needed: Please wait.");
1243 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1244 * their counters to zero. We need a clean slate.
1245 * We don't log our changes till later.
1247 uip
= mp
->m_quotainfo
->qi_uquotaip
;
1249 error
= xfs_qm_dqiterate(mp
, uip
, XFS_QMOPT_UQUOTA
,
1253 flags
|= XFS_UQUOTA_CHKD
;
1256 gip
= mp
->m_quotainfo
->qi_gquotaip
;
1258 error
= xfs_qm_dqiterate(mp
, gip
, XFS_IS_GQUOTA_ON(mp
) ?
1259 XFS_QMOPT_GQUOTA
: XFS_QMOPT_PQUOTA
,
1263 flags
|= XFS_OQUOTA_CHKD
;
1268 * Iterate thru all the inodes in the file system,
1269 * adjusting the corresponding dquot counters in core.
1271 error
= xfs_bulkstat(mp
, &lastino
, &count
,
1272 xfs_qm_dqusage_adjust
,
1273 structsz
, NULL
, &done
);
1280 * We've made all the changes that we need to make incore. Flush them
1281 * down to disk buffers if everything was updated successfully.
1283 if (XFS_IS_UQUOTA_ON(mp
)) {
1284 error
= xfs_qm_dquot_walk(mp
, XFS_DQ_USER
, xfs_qm_flush_one
,
1287 if (XFS_IS_GQUOTA_ON(mp
)) {
1288 error2
= xfs_qm_dquot_walk(mp
, XFS_DQ_GROUP
, xfs_qm_flush_one
,
1293 if (XFS_IS_PQUOTA_ON(mp
)) {
1294 error2
= xfs_qm_dquot_walk(mp
, XFS_DQ_PROJ
, xfs_qm_flush_one
,
1300 error2
= xfs_buf_delwri_submit(&buffer_list
);
1305 * We can get this error if we couldn't do a dquot allocation inside
1306 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1307 * dirty dquots that might be cached, we just want to get rid of them
1308 * and turn quotaoff. The dquots won't be attached to any of the inodes
1309 * at this point (because we intentionally didn't in dqget_noattach).
1312 xfs_qm_dqpurge_all(mp
, XFS_QMOPT_QUOTALL
);
1317 * If one type of quotas is off, then it will lose its
1318 * quotachecked status, since we won't be doing accounting for
1319 * that type anymore.
1321 mp
->m_qflags
&= ~XFS_ALL_QUOTA_CHKD
;
1322 mp
->m_qflags
|= flags
;
1325 while (!list_empty(&buffer_list
)) {
1326 struct xfs_buf
*bp
=
1327 list_first_entry(&buffer_list
, struct xfs_buf
, b_list
);
1328 list_del_init(&bp
->b_list
);
1334 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1337 * We must turn off quotas.
1339 ASSERT(mp
->m_quotainfo
!= NULL
);
1340 xfs_qm_destroy_quotainfo(mp
);
1341 if (xfs_mount_reset_sbqflags(mp
)) {
1343 "Quotacheck: Failed to reset quota flags.");
1346 xfs_notice(mp
, "Quotacheck: Done.");
1351 * This is called after the superblock has been read in and we're ready to
1352 * iget the quota inodes.
1355 xfs_qm_init_quotainos(
1358 xfs_inode_t
*uip
, *gip
;
1363 ASSERT(mp
->m_quotainfo
);
1369 * Get the uquota and gquota inodes
1371 if (xfs_sb_version_hasquota(&mp
->m_sb
)) {
1372 if (XFS_IS_UQUOTA_ON(mp
) &&
1373 mp
->m_sb
.sb_uquotino
!= NULLFSINO
) {
1374 ASSERT(mp
->m_sb
.sb_uquotino
> 0);
1375 if ((error
= xfs_iget(mp
, NULL
, mp
->m_sb
.sb_uquotino
,
1377 return XFS_ERROR(error
);
1379 if (XFS_IS_OQUOTA_ON(mp
) &&
1380 mp
->m_sb
.sb_gquotino
!= NULLFSINO
) {
1381 ASSERT(mp
->m_sb
.sb_gquotino
> 0);
1382 if ((error
= xfs_iget(mp
, NULL
, mp
->m_sb
.sb_gquotino
,
1386 return XFS_ERROR(error
);
1390 flags
|= XFS_QMOPT_SBVERSION
;
1391 sbflags
|= (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
1392 XFS_SB_GQUOTINO
| XFS_SB_QFLAGS
);
1396 * Create the two inodes, if they don't exist already. The changes
1397 * made above will get added to a transaction and logged in one of
1398 * the qino_alloc calls below. If the device is readonly,
1399 * temporarily switch to read-write to do this.
1401 if (XFS_IS_UQUOTA_ON(mp
) && uip
== NULL
) {
1402 if ((error
= xfs_qm_qino_alloc(mp
, &uip
,
1403 sbflags
| XFS_SB_UQUOTINO
,
1404 flags
| XFS_QMOPT_UQUOTA
)))
1405 return XFS_ERROR(error
);
1407 flags
&= ~XFS_QMOPT_SBVERSION
;
1409 if (XFS_IS_OQUOTA_ON(mp
) && gip
== NULL
) {
1410 flags
|= (XFS_IS_GQUOTA_ON(mp
) ?
1411 XFS_QMOPT_GQUOTA
: XFS_QMOPT_PQUOTA
);
1412 error
= xfs_qm_qino_alloc(mp
, &gip
,
1413 sbflags
| XFS_SB_GQUOTINO
, flags
);
1418 return XFS_ERROR(error
);
1422 mp
->m_quotainfo
->qi_uquotaip
= uip
;
1423 mp
->m_quotainfo
->qi_gquotaip
= gip
;
1430 struct xfs_dquot
*dqp
)
1432 struct xfs_mount
*mp
= dqp
->q_mount
;
1433 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
1435 mutex_lock(&qi
->qi_tree_lock
);
1436 radix_tree_delete(XFS_DQUOT_TREE(qi
, dqp
->q_core
.d_flags
),
1437 be32_to_cpu(dqp
->q_core
.d_id
));
1440 mutex_unlock(&qi
->qi_tree_lock
);
1442 xfs_qm_dqdestroy(dqp
);
1446 xfs_qm_dqreclaim_one(
1447 struct xfs_dquot
*dqp
,
1448 struct list_head
*buffer_list
,
1449 struct list_head
*dispose_list
)
1451 struct xfs_mount
*mp
= dqp
->q_mount
;
1452 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
1455 if (!xfs_dqlock_nowait(dqp
))
1459 * This dquot has acquired a reference in the meantime remove it from
1460 * the freelist and try again.
1465 trace_xfs_dqreclaim_want(dqp
);
1466 XFS_STATS_INC(xs_qm_dqwants
);
1468 list_del_init(&dqp
->q_lru
);
1470 XFS_STATS_DEC(xs_qm_dquot_unused
);
1475 * Try to grab the flush lock. If this dquot is in the process of
1476 * getting flushed to disk, we don't want to reclaim it.
1478 if (!xfs_dqflock_nowait(dqp
))
1481 if (XFS_DQ_IS_DIRTY(dqp
)) {
1482 struct xfs_buf
*bp
= NULL
;
1484 trace_xfs_dqreclaim_dirty(dqp
);
1486 error
= xfs_qm_dqflush(dqp
, &bp
);
1488 xfs_warn(mp
, "%s: dquot %p flush failed",
1493 xfs_buf_delwri_queue(bp
, buffer_list
);
1496 * Give the dquot another try on the freelist, as the
1497 * flushing will take some time.
1504 * Prevent lookups now that we are past the point of no return.
1506 dqp
->dq_flags
|= XFS_DQ_FREEING
;
1509 ASSERT(dqp
->q_nrefs
== 0);
1510 list_move_tail(&dqp
->q_lru
, dispose_list
);
1512 XFS_STATS_DEC(xs_qm_dquot_unused
);
1514 trace_xfs_dqreclaim_done(dqp
);
1515 XFS_STATS_INC(xs_qm_dqreclaims
);
1522 * Move the dquot to the tail of the list so that we don't spin on it.
1524 list_move_tail(&dqp
->q_lru
, &qi
->qi_lru_list
);
1526 trace_xfs_dqreclaim_busy(dqp
);
1527 XFS_STATS_INC(xs_qm_dqreclaim_misses
);
1532 struct shrinker
*shrink
,
1533 struct shrink_control
*sc
)
1535 struct xfs_quotainfo
*qi
=
1536 container_of(shrink
, struct xfs_quotainfo
, qi_shrinker
);
1537 int nr_to_scan
= sc
->nr_to_scan
;
1538 LIST_HEAD (buffer_list
);
1539 LIST_HEAD (dispose_list
);
1540 struct xfs_dquot
*dqp
;
1543 if ((sc
->gfp_mask
& (__GFP_FS
|__GFP_WAIT
)) != (__GFP_FS
|__GFP_WAIT
))
1548 mutex_lock(&qi
->qi_lru_lock
);
1549 while (!list_empty(&qi
->qi_lru_list
)) {
1550 if (nr_to_scan
-- <= 0)
1552 dqp
= list_first_entry(&qi
->qi_lru_list
, struct xfs_dquot
,
1554 xfs_qm_dqreclaim_one(dqp
, &buffer_list
, &dispose_list
);
1556 mutex_unlock(&qi
->qi_lru_lock
);
1558 error
= xfs_buf_delwri_submit(&buffer_list
);
1560 xfs_warn(NULL
, "%s: dquot reclaim failed", __func__
);
1562 while (!list_empty(&dispose_list
)) {
1563 dqp
= list_first_entry(&dispose_list
, struct xfs_dquot
, q_lru
);
1564 list_del_init(&dqp
->q_lru
);
1565 xfs_qm_dqfree_one(dqp
);
1569 return (qi
->qi_lru_count
/ 100) * sysctl_vfs_cache_pressure
;
1573 * Start a transaction and write the incore superblock changes to
1574 * disk. flags parameter indicates which fields have changed.
1577 xfs_qm_write_sb_changes(
1584 tp
= xfs_trans_alloc(mp
, XFS_TRANS_QM_SBCHANGE
);
1585 if ((error
= xfs_trans_reserve(tp
, 0,
1586 mp
->m_sb
.sb_sectsize
+ 128, 0,
1588 XFS_DEFAULT_LOG_COUNT
))) {
1589 xfs_trans_cancel(tp
, 0);
1593 xfs_mod_sb(tp
, flags
);
1594 error
= xfs_trans_commit(tp
, 0);
1600 /* --------------- utility functions for vnodeops ---------------- */
1604 * Given an inode, a uid, gid and prid make sure that we have
1605 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1606 * quotas by creating this file.
1607 * This also attaches dquot(s) to the given inode after locking it,
1608 * and returns the dquots corresponding to the uid and/or gid.
1610 * in : inode (unlocked)
1611 * out : udquot, gdquot with references taken and unlocked
1615 struct xfs_inode
*ip
,
1620 struct xfs_dquot
**O_udqpp
,
1621 struct xfs_dquot
**O_gdqpp
)
1623 struct xfs_mount
*mp
= ip
->i_mount
;
1624 struct xfs_dquot
*uq
, *gq
;
1628 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
1631 lockflags
= XFS_ILOCK_EXCL
;
1632 xfs_ilock(ip
, lockflags
);
1634 if ((flags
& XFS_QMOPT_INHERIT
) && XFS_INHERIT_GID(ip
))
1635 gid
= ip
->i_d
.di_gid
;
1638 * Attach the dquot(s) to this inode, doing a dquot allocation
1639 * if necessary. The dquot(s) will not be locked.
1641 if (XFS_NOT_DQATTACHED(mp
, ip
)) {
1642 error
= xfs_qm_dqattach_locked(ip
, XFS_QMOPT_DQALLOC
);
1644 xfs_iunlock(ip
, lockflags
);
1650 if ((flags
& XFS_QMOPT_UQUOTA
) && XFS_IS_UQUOTA_ON(mp
)) {
1651 if (ip
->i_d
.di_uid
!= uid
) {
1653 * What we need is the dquot that has this uid, and
1654 * if we send the inode to dqget, the uid of the inode
1655 * takes priority over what's sent in the uid argument.
1656 * We must unlock inode here before calling dqget if
1657 * we're not sending the inode, because otherwise
1658 * we'll deadlock by doing trans_reserve while
1661 xfs_iunlock(ip
, lockflags
);
1662 if ((error
= xfs_qm_dqget(mp
, NULL
, (xfs_dqid_t
) uid
,
1667 ASSERT(error
!= ENOENT
);
1671 * Get the ilock in the right order.
1674 lockflags
= XFS_ILOCK_SHARED
;
1675 xfs_ilock(ip
, lockflags
);
1678 * Take an extra reference, because we'll return
1681 ASSERT(ip
->i_udquot
);
1682 uq
= xfs_qm_dqhold(ip
->i_udquot
);
1685 if ((flags
& XFS_QMOPT_GQUOTA
) && XFS_IS_GQUOTA_ON(mp
)) {
1686 if (ip
->i_d
.di_gid
!= gid
) {
1687 xfs_iunlock(ip
, lockflags
);
1688 if ((error
= xfs_qm_dqget(mp
, NULL
, (xfs_dqid_t
)gid
,
1695 ASSERT(error
!= ENOENT
);
1699 lockflags
= XFS_ILOCK_SHARED
;
1700 xfs_ilock(ip
, lockflags
);
1702 ASSERT(ip
->i_gdquot
);
1703 gq
= xfs_qm_dqhold(ip
->i_gdquot
);
1705 } else if ((flags
& XFS_QMOPT_PQUOTA
) && XFS_IS_PQUOTA_ON(mp
)) {
1706 if (xfs_get_projid(ip
) != prid
) {
1707 xfs_iunlock(ip
, lockflags
);
1708 if ((error
= xfs_qm_dqget(mp
, NULL
, (xfs_dqid_t
)prid
,
1715 ASSERT(error
!= ENOENT
);
1719 lockflags
= XFS_ILOCK_SHARED
;
1720 xfs_ilock(ip
, lockflags
);
1722 ASSERT(ip
->i_gdquot
);
1723 gq
= xfs_qm_dqhold(ip
->i_gdquot
);
1727 trace_xfs_dquot_dqalloc(ip
);
1729 xfs_iunlock(ip
, lockflags
);
1742 * Actually transfer ownership, and do dquot modifications.
1743 * These were already reserved.
1749 xfs_dquot_t
**IO_olddq
,
1752 xfs_dquot_t
*prevdq
;
1753 uint bfield
= XFS_IS_REALTIME_INODE(ip
) ?
1754 XFS_TRANS_DQ_RTBCOUNT
: XFS_TRANS_DQ_BCOUNT
;
1757 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1758 ASSERT(XFS_IS_QUOTA_RUNNING(ip
->i_mount
));
1763 ASSERT(prevdq
!= newdq
);
1765 xfs_trans_mod_dquot(tp
, prevdq
, bfield
, -(ip
->i_d
.di_nblocks
));
1766 xfs_trans_mod_dquot(tp
, prevdq
, XFS_TRANS_DQ_ICOUNT
, -1);
1768 /* the sparkling new dquot */
1769 xfs_trans_mod_dquot(tp
, newdq
, bfield
, ip
->i_d
.di_nblocks
);
1770 xfs_trans_mod_dquot(tp
, newdq
, XFS_TRANS_DQ_ICOUNT
, 1);
1773 * Take an extra reference, because the inode is going to keep
1774 * this dquot pointer even after the trans_commit.
1776 *IO_olddq
= xfs_qm_dqhold(newdq
);
1782 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1785 xfs_qm_vop_chown_reserve(
1792 xfs_mount_t
*mp
= ip
->i_mount
;
1793 uint delblks
, blkflags
, prjflags
= 0;
1794 xfs_dquot_t
*unresudq
, *unresgdq
, *delblksudq
, *delblksgdq
;
1798 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
));
1799 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1801 delblks
= ip
->i_delayed_blks
;
1802 delblksudq
= delblksgdq
= unresudq
= unresgdq
= NULL
;
1803 blkflags
= XFS_IS_REALTIME_INODE(ip
) ?
1804 XFS_QMOPT_RES_RTBLKS
: XFS_QMOPT_RES_REGBLKS
;
1806 if (XFS_IS_UQUOTA_ON(mp
) && udqp
&&
1807 ip
->i_d
.di_uid
!= (uid_t
)be32_to_cpu(udqp
->q_core
.d_id
)) {
1810 * If there are delayed allocation blocks, then we have to
1811 * unreserve those from the old dquot, and add them to the
1815 ASSERT(ip
->i_udquot
);
1816 unresudq
= ip
->i_udquot
;
1819 if (XFS_IS_OQUOTA_ON(ip
->i_mount
) && gdqp
) {
1820 if (XFS_IS_PQUOTA_ON(ip
->i_mount
) &&
1821 xfs_get_projid(ip
) != be32_to_cpu(gdqp
->q_core
.d_id
))
1822 prjflags
= XFS_QMOPT_ENOSPC
;
1825 (XFS_IS_GQUOTA_ON(ip
->i_mount
) &&
1826 ip
->i_d
.di_gid
!= be32_to_cpu(gdqp
->q_core
.d_id
))) {
1829 ASSERT(ip
->i_gdquot
);
1830 unresgdq
= ip
->i_gdquot
;
1835 if ((error
= xfs_trans_reserve_quota_bydquots(tp
, ip
->i_mount
,
1836 delblksudq
, delblksgdq
, ip
->i_d
.di_nblocks
, 1,
1837 flags
| blkflags
| prjflags
)))
1841 * Do the delayed blks reservations/unreservations now. Since, these
1842 * are done without the help of a transaction, if a reservation fails
1843 * its previous reservations won't be automatically undone by trans
1844 * code. So, we have to do it manually here.
1848 * Do the reservations first. Unreservation can't fail.
1850 ASSERT(delblksudq
|| delblksgdq
);
1851 ASSERT(unresudq
|| unresgdq
);
1852 if ((error
= xfs_trans_reserve_quota_bydquots(NULL
, ip
->i_mount
,
1853 delblksudq
, delblksgdq
, (xfs_qcnt_t
)delblks
, 0,
1854 flags
| blkflags
| prjflags
)))
1856 xfs_trans_reserve_quota_bydquots(NULL
, ip
->i_mount
,
1857 unresudq
, unresgdq
, -((xfs_qcnt_t
)delblks
), 0,
1865 xfs_qm_vop_rename_dqattach(
1866 struct xfs_inode
**i_tab
)
1868 struct xfs_mount
*mp
= i_tab
[0]->i_mount
;
1871 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
1874 for (i
= 0; (i
< 4 && i_tab
[i
]); i
++) {
1875 struct xfs_inode
*ip
= i_tab
[i
];
1879 * Watch out for duplicate entries in the table.
1881 if (i
== 0 || ip
!= i_tab
[i
-1]) {
1882 if (XFS_NOT_DQATTACHED(mp
, ip
)) {
1883 error
= xfs_qm_dqattach(ip
, 0);
1893 xfs_qm_vop_create_dqattach(
1894 struct xfs_trans
*tp
,
1895 struct xfs_inode
*ip
,
1896 struct xfs_dquot
*udqp
,
1897 struct xfs_dquot
*gdqp
)
1899 struct xfs_mount
*mp
= tp
->t_mountp
;
1901 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
1904 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1905 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1908 ASSERT(ip
->i_udquot
== NULL
);
1909 ASSERT(XFS_IS_UQUOTA_ON(mp
));
1910 ASSERT(ip
->i_d
.di_uid
== be32_to_cpu(udqp
->q_core
.d_id
));
1912 ip
->i_udquot
= xfs_qm_dqhold(udqp
);
1913 xfs_trans_mod_dquot(tp
, udqp
, XFS_TRANS_DQ_ICOUNT
, 1);
1916 ASSERT(ip
->i_gdquot
== NULL
);
1917 ASSERT(XFS_IS_OQUOTA_ON(mp
));
1918 ASSERT((XFS_IS_GQUOTA_ON(mp
) ?
1919 ip
->i_d
.di_gid
: xfs_get_projid(ip
)) ==
1920 be32_to_cpu(gdqp
->q_core
.d_id
));
1922 ip
->i_gdquot
= xfs_qm_dqhold(gdqp
);
1923 xfs_trans_mod_dquot(tp
, gdqp
, XFS_TRANS_DQ_ICOUNT
, 1);