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"
43 #include "xfs_icache.h"
46 * The global quota manager. There is only one of these for the entire
47 * system, _not_ one per file system. XQM keeps track of the overall
48 * quota functionality, including maintaining the freelist and hash
51 STATIC
int xfs_qm_init_quotainos(xfs_mount_t
*);
52 STATIC
int xfs_qm_init_quotainfo(xfs_mount_t
*);
53 STATIC
int xfs_qm_shake(struct shrinker
*, struct shrink_control
*);
56 * We use the batch lookup interface to iterate over the dquots as it
57 * currently is the only interface into the radix tree code that allows
58 * fuzzy lookups instead of exact matches. Holding the lock over multiple
59 * operations is fine as all callers are used either during mount/umount
62 #define XFS_DQ_LOOKUP_BATCH 32
68 int (*execute
)(struct xfs_dquot
*dqp
, void *data
),
71 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
72 struct radix_tree_root
*tree
= XFS_DQUOT_TREE(qi
, type
);
84 struct xfs_dquot
*batch
[XFS_DQ_LOOKUP_BATCH
];
88 mutex_lock(&qi
->qi_tree_lock
);
89 nr_found
= radix_tree_gang_lookup(tree
, (void **)batch
,
90 next_index
, XFS_DQ_LOOKUP_BATCH
);
92 mutex_unlock(&qi
->qi_tree_lock
);
96 for (i
= 0; i
< nr_found
; i
++) {
97 struct xfs_dquot
*dqp
= batch
[i
];
99 next_index
= be32_to_cpu(dqp
->q_core
.d_id
) + 1;
101 error
= execute(batch
[i
], data
);
102 if (error
== EAGAIN
) {
106 if (error
&& last_error
!= EFSCORRUPTED
)
110 mutex_unlock(&qi
->qi_tree_lock
);
112 /* bail out if the filesystem is corrupted. */
113 if (last_error
== EFSCORRUPTED
) {
129 * Purge a dquot from all tracking data structures and free it.
133 struct xfs_dquot
*dqp
,
136 struct xfs_mount
*mp
= dqp
->q_mount
;
137 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
138 struct xfs_dquot
*gdqp
= NULL
;
141 if ((dqp
->dq_flags
& XFS_DQ_FREEING
) || dqp
->q_nrefs
!= 0) {
147 * If this quota has a group hint attached, prepare for releasing it
150 gdqp
= dqp
->q_gdquot
;
153 dqp
->q_gdquot
= NULL
;
156 dqp
->dq_flags
|= XFS_DQ_FREEING
;
161 * If we are turning this type of quotas off, we don't care
162 * about the dirty metadata sitting in this dquot. OTOH, if
163 * we're unmounting, we do care, so we flush it and wait.
165 if (XFS_DQ_IS_DIRTY(dqp
)) {
166 struct xfs_buf
*bp
= NULL
;
170 * We don't care about getting disk errors here. We need
171 * to purge this dquot anyway, so we go ahead regardless.
173 error
= xfs_qm_dqflush(dqp
, &bp
);
175 xfs_warn(mp
, "%s: dquot %p flush failed",
178 error
= xfs_bwrite(bp
);
184 ASSERT(atomic_read(&dqp
->q_pincount
) == 0);
185 ASSERT(XFS_FORCED_SHUTDOWN(mp
) ||
186 !(dqp
->q_logitem
.qli_item
.li_flags
& XFS_LI_IN_AIL
));
191 radix_tree_delete(XFS_DQUOT_TREE(qi
, dqp
->q_core
.d_flags
),
192 be32_to_cpu(dqp
->q_core
.d_id
));
196 * We move dquots to the freelist as soon as their reference count
197 * hits zero, so it really should be on the freelist here.
199 mutex_lock(&qi
->qi_lru_lock
);
200 ASSERT(!list_empty(&dqp
->q_lru
));
201 list_del_init(&dqp
->q_lru
);
203 XFS_STATS_DEC(xs_qm_dquot_unused
);
204 mutex_unlock(&qi
->qi_lru_lock
);
206 xfs_qm_dqdestroy(dqp
);
214 * Purge the dquot cache.
218 struct xfs_mount
*mp
,
221 if (flags
& XFS_QMOPT_UQUOTA
)
222 xfs_qm_dquot_walk(mp
, XFS_DQ_USER
, xfs_qm_dqpurge
, NULL
);
223 if (flags
& XFS_QMOPT_GQUOTA
)
224 xfs_qm_dquot_walk(mp
, XFS_DQ_GROUP
, xfs_qm_dqpurge
, NULL
);
225 if (flags
& XFS_QMOPT_PQUOTA
)
226 xfs_qm_dquot_walk(mp
, XFS_DQ_PROJ
, xfs_qm_dqpurge
, NULL
);
230 * Just destroy the quotainfo structure.
234 struct xfs_mount
*mp
)
236 if (mp
->m_quotainfo
) {
237 xfs_qm_dqpurge_all(mp
, XFS_QMOPT_QUOTALL
);
238 xfs_qm_destroy_quotainfo(mp
);
244 * This is called from xfs_mountfs to start quotas and initialize all
245 * necessary data structures like quotainfo. This is also responsible for
246 * running a quotacheck as necessary. We are guaranteed that the superblock
247 * is consistently read in at this point.
249 * If we fail here, the mount will continue with quota turned off. We don't
250 * need to inidicate success or failure at all.
260 * If quotas on realtime volumes is not supported, we disable
261 * quotas immediately.
263 if (mp
->m_sb
.sb_rextents
) {
264 xfs_notice(mp
, "Cannot turn on quotas for realtime filesystem");
269 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
272 * Allocate the quotainfo structure inside the mount struct, and
273 * create quotainode(s), and change/rev superblock if necessary.
275 error
= xfs_qm_init_quotainfo(mp
);
278 * We must turn off quotas.
280 ASSERT(mp
->m_quotainfo
== NULL
);
285 * If any of the quotas are not consistent, do a quotacheck.
287 if (XFS_QM_NEED_QUOTACHECK(mp
)) {
288 error
= xfs_qm_quotacheck(mp
);
290 /* Quotacheck failed and disabled quotas. */
295 * If one type of quotas is off, then it will lose its
296 * quotachecked status, since we won't be doing accounting for
299 if (!XFS_IS_UQUOTA_ON(mp
))
300 mp
->m_qflags
&= ~XFS_UQUOTA_CHKD
;
301 if (!(XFS_IS_GQUOTA_ON(mp
) || XFS_IS_PQUOTA_ON(mp
)))
302 mp
->m_qflags
&= ~XFS_OQUOTA_CHKD
;
306 * We actually don't have to acquire the m_sb_lock at all.
307 * This can only be called from mount, and that's single threaded. XXX
309 spin_lock(&mp
->m_sb_lock
);
310 sbf
= mp
->m_sb
.sb_qflags
;
311 mp
->m_sb
.sb_qflags
= mp
->m_qflags
& XFS_MOUNT_QUOTA_ALL
;
312 spin_unlock(&mp
->m_sb_lock
);
314 if (sbf
!= (mp
->m_qflags
& XFS_MOUNT_QUOTA_ALL
)) {
315 if (xfs_qm_write_sb_changes(mp
, XFS_SB_QFLAGS
)) {
317 * We could only have been turning quotas off.
318 * We aren't in very good shape actually because
319 * the incore structures are convinced that quotas are
320 * off, but the on disk superblock doesn't know that !
322 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp
)));
323 xfs_alert(mp
, "%s: Superblock update failed!",
329 xfs_warn(mp
, "Failed to initialize disk quotas.");
335 * Called from the vfsops layer.
338 xfs_qm_unmount_quotas(
342 * Release the dquots that root inode, et al might be holding,
343 * before we flush quotas and blow away the quotainfo structure.
345 ASSERT(mp
->m_rootip
);
346 xfs_qm_dqdetach(mp
->m_rootip
);
348 xfs_qm_dqdetach(mp
->m_rbmip
);
350 xfs_qm_dqdetach(mp
->m_rsumip
);
353 * Release the quota inodes.
355 if (mp
->m_quotainfo
) {
356 if (mp
->m_quotainfo
->qi_uquotaip
) {
357 IRELE(mp
->m_quotainfo
->qi_uquotaip
);
358 mp
->m_quotainfo
->qi_uquotaip
= NULL
;
360 if (mp
->m_quotainfo
->qi_gquotaip
) {
361 IRELE(mp
->m_quotainfo
->qi_gquotaip
);
362 mp
->m_quotainfo
->qi_gquotaip
= NULL
;
373 xfs_dquot_t
*udqhint
, /* hint */
374 xfs_dquot_t
**IO_idqpp
)
379 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
383 * See if we already have it in the inode itself. IO_idqpp is
384 * &i_udquot or &i_gdquot. This made the code look weird, but
385 * made the logic a lot simpler.
389 trace_xfs_dqattach_found(dqp
);
394 * udqhint is the i_udquot field in inode, and is non-NULL only
395 * when the type arg is group/project. Its purpose is to save a
396 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
400 ASSERT(type
== XFS_DQ_GROUP
|| type
== XFS_DQ_PROJ
);
404 * No need to take dqlock to look at the id.
406 * The ID can't change until it gets reclaimed, and it won't
407 * be reclaimed as long as we have a ref from inode and we
410 dqp
= udqhint
->q_gdquot
;
411 if (dqp
&& be32_to_cpu(dqp
->q_core
.d_id
) == id
) {
412 ASSERT(*IO_idqpp
== NULL
);
414 *IO_idqpp
= xfs_qm_dqhold(dqp
);
415 xfs_dqunlock(udqhint
);
420 * We can't hold a dquot lock when we call the dqget code.
421 * We'll deadlock in no time, because of (not conforming to)
422 * lock ordering - the inodelock comes before any dquot lock,
423 * and we may drop and reacquire the ilock in xfs_qm_dqget().
425 xfs_dqunlock(udqhint
);
429 * Find the dquot from somewhere. This bumps the
430 * reference count of dquot and returns it locked.
431 * This can return ENOENT if dquot didn't exist on
432 * disk and we didn't ask it to allocate;
433 * ESRCH if quotas got turned off suddenly.
435 error
= xfs_qm_dqget(ip
->i_mount
, ip
, id
, type
,
436 doalloc
| XFS_QMOPT_DOWARN
, &dqp
);
440 trace_xfs_dqattach_get(dqp
);
443 * dqget may have dropped and re-acquired the ilock, but it guarantees
444 * that the dquot returned is the one that should go in the inode.
453 * Given a udquot and gdquot, attach a ptr to the group dquot in the
454 * udquot as a hint for future lookups.
457 xfs_qm_dqattach_grouphint(
470 udq
->q_gdquot
= NULL
;
474 udq
->q_gdquot
= xfs_qm_dqhold(gdq
);
480 xfs_qm_need_dqattach(
481 struct xfs_inode
*ip
)
483 struct xfs_mount
*mp
= ip
->i_mount
;
485 if (!XFS_IS_QUOTA_RUNNING(mp
))
487 if (!XFS_IS_QUOTA_ON(mp
))
489 if (!XFS_NOT_DQATTACHED(mp
, ip
))
491 if (ip
->i_ino
== mp
->m_sb
.sb_uquotino
||
492 ip
->i_ino
== mp
->m_sb
.sb_gquotino
)
498 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
500 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
501 * Inode may get unlocked and relocked in here, and the caller must deal with
505 xfs_qm_dqattach_locked(
509 xfs_mount_t
*mp
= ip
->i_mount
;
513 if (!xfs_qm_need_dqattach(ip
))
516 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
518 if (XFS_IS_UQUOTA_ON(mp
)) {
519 error
= xfs_qm_dqattach_one(ip
, ip
->i_d
.di_uid
, XFS_DQ_USER
,
520 flags
& XFS_QMOPT_DQALLOC
,
521 NULL
, &ip
->i_udquot
);
527 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
528 if (XFS_IS_OQUOTA_ON(mp
)) {
529 error
= XFS_IS_GQUOTA_ON(mp
) ?
530 xfs_qm_dqattach_one(ip
, ip
->i_d
.di_gid
, XFS_DQ_GROUP
,
531 flags
& XFS_QMOPT_DQALLOC
,
532 ip
->i_udquot
, &ip
->i_gdquot
) :
533 xfs_qm_dqattach_one(ip
, xfs_get_projid(ip
), XFS_DQ_PROJ
,
534 flags
& XFS_QMOPT_DQALLOC
,
535 ip
->i_udquot
, &ip
->i_gdquot
);
537 * Don't worry about the udquot that we may have
538 * attached above. It'll get detached, if not already.
546 * Attach this group quota to the user quota as a hint.
547 * This WON'T, in general, result in a thrash.
550 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
551 ASSERT(ip
->i_udquot
);
552 ASSERT(ip
->i_gdquot
);
555 * We do not have i_udquot locked at this point, but this check
556 * is OK since we don't depend on the i_gdquot to be accurate
557 * 100% all the time. It is just a hint, and this will
558 * succeed in general.
560 if (ip
->i_udquot
->q_gdquot
!= ip
->i_gdquot
)
561 xfs_qm_dqattach_grouphint(ip
->i_udquot
, ip
->i_gdquot
);
567 if (XFS_IS_UQUOTA_ON(mp
))
568 ASSERT(ip
->i_udquot
);
569 if (XFS_IS_OQUOTA_ON(mp
))
570 ASSERT(ip
->i_gdquot
);
572 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
579 struct xfs_inode
*ip
,
584 if (!xfs_qm_need_dqattach(ip
))
587 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
588 error
= xfs_qm_dqattach_locked(ip
, flags
);
589 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
595 * Release dquots (and their references) if any.
596 * The inode should be locked EXCL except when this's called by
603 if (!(ip
->i_udquot
|| ip
->i_gdquot
))
606 trace_xfs_dquot_dqdetach(ip
);
608 ASSERT(ip
->i_ino
!= ip
->i_mount
->m_sb
.sb_uquotino
);
609 ASSERT(ip
->i_ino
!= ip
->i_mount
->m_sb
.sb_gquotino
);
611 xfs_qm_dqrele(ip
->i_udquot
);
615 xfs_qm_dqrele(ip
->i_gdquot
);
621 * This initializes all the quota information that's kept in the
625 xfs_qm_init_quotainfo(
628 xfs_quotainfo_t
*qinf
;
632 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
634 qinf
= mp
->m_quotainfo
= kmem_zalloc(sizeof(xfs_quotainfo_t
), KM_SLEEP
);
637 * See if quotainodes are setup, and if not, allocate them,
638 * and change the superblock accordingly.
640 if ((error
= xfs_qm_init_quotainos(mp
))) {
642 mp
->m_quotainfo
= NULL
;
646 INIT_RADIX_TREE(&qinf
->qi_uquota_tree
, GFP_NOFS
);
647 INIT_RADIX_TREE(&qinf
->qi_gquota_tree
, GFP_NOFS
);
648 mutex_init(&qinf
->qi_tree_lock
);
650 INIT_LIST_HEAD(&qinf
->qi_lru_list
);
651 qinf
->qi_lru_count
= 0;
652 mutex_init(&qinf
->qi_lru_lock
);
654 /* mutex used to serialize quotaoffs */
655 mutex_init(&qinf
->qi_quotaofflock
);
657 /* Precalc some constants */
658 qinf
->qi_dqchunklen
= XFS_FSB_TO_BB(mp
, XFS_DQUOT_CLUSTER_SIZE_FSB
);
659 ASSERT(qinf
->qi_dqchunklen
);
660 qinf
->qi_dqperchunk
= BBTOB(qinf
->qi_dqchunklen
);
661 do_div(qinf
->qi_dqperchunk
, sizeof(xfs_dqblk_t
));
663 mp
->m_qflags
|= (mp
->m_sb
.sb_qflags
& XFS_ALL_QUOTA_CHKD
);
666 * We try to get the limits from the superuser's limits fields.
667 * This is quite hacky, but it is standard quota practice.
669 * We look at the USR dquot with id == 0 first, but if user quotas
670 * are not enabled we goto the GRP dquot with id == 0.
671 * We don't really care to keep separate default limits for user
672 * and group quotas, at least not at this point.
674 * Since we may not have done a quotacheck by this point, just read
675 * the dquot without attaching it to any hashtables or lists.
677 error
= xfs_qm_dqread(mp
, 0,
678 XFS_IS_UQUOTA_RUNNING(mp
) ? XFS_DQ_USER
:
679 (XFS_IS_GQUOTA_RUNNING(mp
) ? XFS_DQ_GROUP
:
681 XFS_QMOPT_DOWARN
, &dqp
);
683 xfs_disk_dquot_t
*ddqp
= &dqp
->q_core
;
686 * The warnings and timers set the grace period given to
687 * a user or group before he or she can not perform any
688 * more writing. If it is zero, a default is used.
690 qinf
->qi_btimelimit
= ddqp
->d_btimer
?
691 be32_to_cpu(ddqp
->d_btimer
) : XFS_QM_BTIMELIMIT
;
692 qinf
->qi_itimelimit
= ddqp
->d_itimer
?
693 be32_to_cpu(ddqp
->d_itimer
) : XFS_QM_ITIMELIMIT
;
694 qinf
->qi_rtbtimelimit
= ddqp
->d_rtbtimer
?
695 be32_to_cpu(ddqp
->d_rtbtimer
) : XFS_QM_RTBTIMELIMIT
;
696 qinf
->qi_bwarnlimit
= ddqp
->d_bwarns
?
697 be16_to_cpu(ddqp
->d_bwarns
) : XFS_QM_BWARNLIMIT
;
698 qinf
->qi_iwarnlimit
= ddqp
->d_iwarns
?
699 be16_to_cpu(ddqp
->d_iwarns
) : XFS_QM_IWARNLIMIT
;
700 qinf
->qi_rtbwarnlimit
= ddqp
->d_rtbwarns
?
701 be16_to_cpu(ddqp
->d_rtbwarns
) : XFS_QM_RTBWARNLIMIT
;
702 qinf
->qi_bhardlimit
= be64_to_cpu(ddqp
->d_blk_hardlimit
);
703 qinf
->qi_bsoftlimit
= be64_to_cpu(ddqp
->d_blk_softlimit
);
704 qinf
->qi_ihardlimit
= be64_to_cpu(ddqp
->d_ino_hardlimit
);
705 qinf
->qi_isoftlimit
= be64_to_cpu(ddqp
->d_ino_softlimit
);
706 qinf
->qi_rtbhardlimit
= be64_to_cpu(ddqp
->d_rtb_hardlimit
);
707 qinf
->qi_rtbsoftlimit
= be64_to_cpu(ddqp
->d_rtb_softlimit
);
709 xfs_qm_dqdestroy(dqp
);
711 qinf
->qi_btimelimit
= XFS_QM_BTIMELIMIT
;
712 qinf
->qi_itimelimit
= XFS_QM_ITIMELIMIT
;
713 qinf
->qi_rtbtimelimit
= XFS_QM_RTBTIMELIMIT
;
714 qinf
->qi_bwarnlimit
= XFS_QM_BWARNLIMIT
;
715 qinf
->qi_iwarnlimit
= XFS_QM_IWARNLIMIT
;
716 qinf
->qi_rtbwarnlimit
= XFS_QM_RTBWARNLIMIT
;
719 qinf
->qi_shrinker
.shrink
= xfs_qm_shake
;
720 qinf
->qi_shrinker
.seeks
= DEFAULT_SEEKS
;
721 register_shrinker(&qinf
->qi_shrinker
);
727 * Gets called when unmounting a filesystem or when all quotas get
729 * This purges the quota inodes, destroys locks and frees itself.
732 xfs_qm_destroy_quotainfo(
737 qi
= mp
->m_quotainfo
;
740 unregister_shrinker(&qi
->qi_shrinker
);
742 if (qi
->qi_uquotaip
) {
743 IRELE(qi
->qi_uquotaip
);
744 qi
->qi_uquotaip
= NULL
; /* paranoia */
746 if (qi
->qi_gquotaip
) {
747 IRELE(qi
->qi_gquotaip
);
748 qi
->qi_gquotaip
= NULL
;
750 mutex_destroy(&qi
->qi_quotaofflock
);
752 mp
->m_quotainfo
= NULL
;
756 * Create an inode and return with a reference already taken, but unlocked
757 * This is how we create quota inodes
770 tp
= xfs_trans_alloc(mp
, XFS_TRANS_QM_QINOCREATE
);
771 if ((error
= xfs_trans_reserve(tp
,
772 XFS_QM_QINOCREATE_SPACE_RES(mp
),
773 XFS_CREATE_LOG_RES(mp
), 0,
774 XFS_TRANS_PERM_LOG_RES
,
775 XFS_CREATE_LOG_COUNT
))) {
776 xfs_trans_cancel(tp
, 0);
780 error
= xfs_dir_ialloc(&tp
, NULL
, S_IFREG
, 1, 0, 0, 1, ip
, &committed
);
782 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
|
788 * Make the changes in the superblock, and log those too.
789 * sbfields arg may contain fields other than *QUOTINO;
790 * VERSIONNUM for example.
792 spin_lock(&mp
->m_sb_lock
);
793 if (flags
& XFS_QMOPT_SBVERSION
) {
794 ASSERT(!xfs_sb_version_hasquota(&mp
->m_sb
));
795 ASSERT((sbfields
& (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
796 XFS_SB_GQUOTINO
| XFS_SB_QFLAGS
)) ==
797 (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
798 XFS_SB_GQUOTINO
| XFS_SB_QFLAGS
));
800 xfs_sb_version_addquota(&mp
->m_sb
);
801 mp
->m_sb
.sb_uquotino
= NULLFSINO
;
802 mp
->m_sb
.sb_gquotino
= NULLFSINO
;
804 /* qflags will get updated _after_ quotacheck */
805 mp
->m_sb
.sb_qflags
= 0;
807 if (flags
& XFS_QMOPT_UQUOTA
)
808 mp
->m_sb
.sb_uquotino
= (*ip
)->i_ino
;
810 mp
->m_sb
.sb_gquotino
= (*ip
)->i_ino
;
811 spin_unlock(&mp
->m_sb_lock
);
812 xfs_mod_sb(tp
, sbfields
);
814 if ((error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
))) {
815 xfs_alert(mp
, "%s failed (error %d)!", __func__
, error
);
823 xfs_qm_reset_dqcounts(
829 xfs_disk_dquot_t
*ddq
;
832 trace_xfs_reset_dqcounts(bp
, _RET_IP_
);
835 * Reset all counters and timers. They'll be
836 * started afresh by xfs_qm_quotacheck.
839 j
= XFS_FSB_TO_B(mp
, XFS_DQUOT_CLUSTER_SIZE_FSB
);
840 do_div(j
, sizeof(xfs_dqblk_t
));
841 ASSERT(mp
->m_quotainfo
->qi_dqperchunk
== j
);
844 for (j
= 0; j
< mp
->m_quotainfo
->qi_dqperchunk
; j
++) {
846 * Do a sanity check, and if needed, repair the dqblk. Don't
847 * output any warnings because it's perfectly possible to
848 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
850 (void) xfs_qm_dqcheck(mp
, ddq
, id
+j
, type
, XFS_QMOPT_DQREPAIR
,
861 ddq
= (xfs_disk_dquot_t
*) ((xfs_dqblk_t
*)ddq
+ 1);
867 struct xfs_mount
*mp
,
870 xfs_filblks_t blkcnt
,
872 struct list_head
*buffer_list
)
879 type
= flags
& XFS_QMOPT_UQUOTA
? XFS_DQ_USER
:
880 (flags
& XFS_QMOPT_PQUOTA
? XFS_DQ_PROJ
: XFS_DQ_GROUP
);
884 * Blkcnt arg can be a very big number, and might even be
885 * larger than the log itself. So, we have to break it up into
886 * manageable-sized transactions.
887 * Note that we don't start a permanent transaction here; we might
888 * not be able to get a log reservation for the whole thing up front,
889 * and we don't really care to either, because we just discard
890 * everything if we were to crash in the middle of this loop.
893 error
= xfs_trans_read_buf(mp
, NULL
, mp
->m_ddev_targp
,
894 XFS_FSB_TO_DADDR(mp
, bno
),
895 mp
->m_quotainfo
->qi_dqchunklen
, 0, &bp
);
899 xfs_qm_reset_dqcounts(mp
, bp
, firstid
, type
);
900 xfs_buf_delwri_queue(bp
, buffer_list
);
903 * goto the next block.
906 firstid
+= mp
->m_quotainfo
->qi_dqperchunk
;
913 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
914 * caller supplied function for every chunk of dquots that we find.
918 struct xfs_mount
*mp
,
919 struct xfs_inode
*qip
,
921 struct list_head
*buffer_list
)
923 struct xfs_bmbt_irec
*map
;
924 int i
, nmaps
; /* number of map entries */
925 int error
; /* return value */
926 xfs_fileoff_t lblkno
;
927 xfs_filblks_t maxlblkcnt
;
929 xfs_fsblock_t rablkno
;
930 xfs_filblks_t rablkcnt
;
934 * This looks racy, but we can't keep an inode lock across a
935 * trans_reserve. But, this gets called during quotacheck, and that
936 * happens only at mount time which is single threaded.
938 if (qip
->i_d
.di_nblocks
== 0)
941 map
= kmem_alloc(XFS_DQITER_MAP_SIZE
* sizeof(*map
), KM_SLEEP
);
944 maxlblkcnt
= XFS_B_TO_FSB(mp
, mp
->m_super
->s_maxbytes
);
946 nmaps
= XFS_DQITER_MAP_SIZE
;
948 * We aren't changing the inode itself. Just changing
949 * some of its data. No new blocks are added here, and
950 * the inode is never added to the transaction.
952 xfs_ilock(qip
, XFS_ILOCK_SHARED
);
953 error
= xfs_bmapi_read(qip
, lblkno
, maxlblkcnt
- lblkno
,
955 xfs_iunlock(qip
, XFS_ILOCK_SHARED
);
959 ASSERT(nmaps
<= XFS_DQITER_MAP_SIZE
);
960 for (i
= 0; i
< nmaps
; i
++) {
961 ASSERT(map
[i
].br_startblock
!= DELAYSTARTBLOCK
);
962 ASSERT(map
[i
].br_blockcount
);
965 lblkno
+= map
[i
].br_blockcount
;
967 if (map
[i
].br_startblock
== HOLESTARTBLOCK
)
970 firstid
= (xfs_dqid_t
) map
[i
].br_startoff
*
971 mp
->m_quotainfo
->qi_dqperchunk
;
973 * Do a read-ahead on the next extent.
976 (map
[i
+1].br_startblock
!= HOLESTARTBLOCK
)) {
977 rablkcnt
= map
[i
+1].br_blockcount
;
978 rablkno
= map
[i
+1].br_startblock
;
980 xfs_buf_readahead(mp
->m_ddev_targp
,
981 XFS_FSB_TO_DADDR(mp
, rablkno
),
982 mp
->m_quotainfo
->qi_dqchunklen
);
987 * Iterate thru all the blks in the extent and
988 * reset the counters of all the dquots inside them.
990 error
= xfs_qm_dqiter_bufs(mp
, firstid
,
991 map
[i
].br_startblock
,
992 map
[i
].br_blockcount
,
1005 * Called by dqusage_adjust in doing a quotacheck.
1007 * Given the inode, and a dquot id this updates both the incore dqout as well
1008 * as the buffer copy. This is so that once the quotacheck is done, we can
1009 * just log all the buffers, as opposed to logging numerous updates to
1010 * individual dquots.
1013 xfs_qm_quotacheck_dqadjust(
1014 struct xfs_inode
*ip
,
1020 struct xfs_mount
*mp
= ip
->i_mount
;
1021 struct xfs_dquot
*dqp
;
1024 error
= xfs_qm_dqget(mp
, ip
, id
, type
,
1025 XFS_QMOPT_DQALLOC
| XFS_QMOPT_DOWARN
, &dqp
);
1028 * Shouldn't be able to turn off quotas here.
1030 ASSERT(error
!= ESRCH
);
1031 ASSERT(error
!= ENOENT
);
1035 trace_xfs_dqadjust(dqp
);
1038 * Adjust the inode count and the block count to reflect this inode's
1041 be64_add_cpu(&dqp
->q_core
.d_icount
, 1);
1042 dqp
->q_res_icount
++;
1044 be64_add_cpu(&dqp
->q_core
.d_bcount
, nblks
);
1045 dqp
->q_res_bcount
+= nblks
;
1048 be64_add_cpu(&dqp
->q_core
.d_rtbcount
, rtblks
);
1049 dqp
->q_res_rtbcount
+= rtblks
;
1053 * Set default limits, adjust timers (since we changed usages)
1055 * There are no timers for the default values set in the root dquot.
1057 if (dqp
->q_core
.d_id
) {
1058 xfs_qm_adjust_dqlimits(mp
, &dqp
->q_core
);
1059 xfs_qm_adjust_dqtimers(mp
, &dqp
->q_core
);
1062 dqp
->dq_flags
|= XFS_DQ_DIRTY
;
1070 xfs_qcnt_t
*O_rtblks
)
1072 xfs_filblks_t rtblks
; /* total rt blks */
1073 xfs_extnum_t idx
; /* extent record index */
1074 xfs_ifork_t
*ifp
; /* inode fork pointer */
1075 xfs_extnum_t nextents
; /* number of extent entries */
1078 ASSERT(XFS_IS_REALTIME_INODE(ip
));
1079 ifp
= XFS_IFORK_PTR(ip
, XFS_DATA_FORK
);
1080 if (!(ifp
->if_flags
& XFS_IFEXTENTS
)) {
1081 if ((error
= xfs_iread_extents(NULL
, ip
, XFS_DATA_FORK
)))
1085 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
1086 for (idx
= 0; idx
< nextents
; idx
++)
1087 rtblks
+= xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp
, idx
));
1088 *O_rtblks
= (xfs_qcnt_t
)rtblks
;
1093 * callback routine supplied to bulkstat(). Given an inumber, find its
1094 * dquots and update them to account for resources taken by that inode.
1098 xfs_qm_dqusage_adjust(
1099 xfs_mount_t
*mp
, /* mount point for filesystem */
1100 xfs_ino_t ino
, /* inode number to get data for */
1101 void __user
*buffer
, /* not used */
1102 int ubsize
, /* not used */
1103 int *ubused
, /* not used */
1104 int *res
) /* result code value */
1107 xfs_qcnt_t nblks
, rtblks
= 0;
1110 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1113 * rootino must have its resources accounted for, not so with the quota
1116 if (ino
== mp
->m_sb
.sb_uquotino
|| ino
== mp
->m_sb
.sb_gquotino
) {
1117 *res
= BULKSTAT_RV_NOTHING
;
1118 return XFS_ERROR(EINVAL
);
1122 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1123 * interface expects the inode to be exclusively locked because that's
1124 * the case in all other instances. It's OK that we do this because
1125 * quotacheck is done only at mount time.
1127 error
= xfs_iget(mp
, NULL
, ino
, 0, XFS_ILOCK_EXCL
, &ip
);
1129 *res
= BULKSTAT_RV_NOTHING
;
1133 ASSERT(ip
->i_delayed_blks
== 0);
1135 if (XFS_IS_REALTIME_INODE(ip
)) {
1137 * Walk thru the extent list and count the realtime blocks.
1139 error
= xfs_qm_get_rtblks(ip
, &rtblks
);
1144 nblks
= (xfs_qcnt_t
)ip
->i_d
.di_nblocks
- rtblks
;
1147 * Add the (disk blocks and inode) resources occupied by this
1148 * inode to its dquots. We do this adjustment in the incore dquot,
1149 * and also copy the changes to its buffer.
1150 * We don't care about putting these changes in a transaction
1151 * envelope because if we crash in the middle of a 'quotacheck'
1152 * we have to start from the beginning anyway.
1153 * Once we're done, we'll log all the dquot bufs.
1155 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1156 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1158 if (XFS_IS_UQUOTA_ON(mp
)) {
1159 error
= xfs_qm_quotacheck_dqadjust(ip
, ip
->i_d
.di_uid
,
1160 XFS_DQ_USER
, nblks
, rtblks
);
1165 if (XFS_IS_GQUOTA_ON(mp
)) {
1166 error
= xfs_qm_quotacheck_dqadjust(ip
, ip
->i_d
.di_gid
,
1167 XFS_DQ_GROUP
, nblks
, rtblks
);
1172 if (XFS_IS_PQUOTA_ON(mp
)) {
1173 error
= xfs_qm_quotacheck_dqadjust(ip
, xfs_get_projid(ip
),
1174 XFS_DQ_PROJ
, nblks
, rtblks
);
1179 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1181 *res
= BULKSTAT_RV_DIDONE
;
1185 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1187 *res
= BULKSTAT_RV_GIVEUP
;
1193 struct xfs_dquot
*dqp
,
1196 struct list_head
*buffer_list
= data
;
1197 struct xfs_buf
*bp
= NULL
;
1201 if (dqp
->dq_flags
& XFS_DQ_FREEING
)
1203 if (!XFS_DQ_IS_DIRTY(dqp
))
1207 error
= xfs_qm_dqflush(dqp
, &bp
);
1211 xfs_buf_delwri_queue(bp
, buffer_list
);
1219 * Walk thru all the filesystem inodes and construct a consistent view
1220 * of the disk quota world. If the quotacheck fails, disable quotas.
1226 int done
, count
, error
, error2
;
1229 xfs_inode_t
*uip
, *gip
;
1231 LIST_HEAD (buffer_list
);
1238 ASSERT(mp
->m_quotainfo
->qi_uquotaip
|| mp
->m_quotainfo
->qi_gquotaip
);
1239 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1241 xfs_notice(mp
, "Quotacheck needed: Please wait.");
1244 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1245 * their counters to zero. We need a clean slate.
1246 * We don't log our changes till later.
1248 uip
= mp
->m_quotainfo
->qi_uquotaip
;
1250 error
= xfs_qm_dqiterate(mp
, uip
, XFS_QMOPT_UQUOTA
,
1254 flags
|= XFS_UQUOTA_CHKD
;
1257 gip
= mp
->m_quotainfo
->qi_gquotaip
;
1259 error
= xfs_qm_dqiterate(mp
, gip
, XFS_IS_GQUOTA_ON(mp
) ?
1260 XFS_QMOPT_GQUOTA
: XFS_QMOPT_PQUOTA
,
1264 flags
|= XFS_OQUOTA_CHKD
;
1269 * Iterate thru all the inodes in the file system,
1270 * adjusting the corresponding dquot counters in core.
1272 error
= xfs_bulkstat(mp
, &lastino
, &count
,
1273 xfs_qm_dqusage_adjust
,
1274 structsz
, NULL
, &done
);
1281 * We've made all the changes that we need to make incore. Flush them
1282 * down to disk buffers if everything was updated successfully.
1284 if (XFS_IS_UQUOTA_ON(mp
)) {
1285 error
= xfs_qm_dquot_walk(mp
, XFS_DQ_USER
, xfs_qm_flush_one
,
1288 if (XFS_IS_GQUOTA_ON(mp
)) {
1289 error2
= xfs_qm_dquot_walk(mp
, XFS_DQ_GROUP
, xfs_qm_flush_one
,
1294 if (XFS_IS_PQUOTA_ON(mp
)) {
1295 error2
= xfs_qm_dquot_walk(mp
, XFS_DQ_PROJ
, xfs_qm_flush_one
,
1301 error2
= xfs_buf_delwri_submit(&buffer_list
);
1306 * We can get this error if we couldn't do a dquot allocation inside
1307 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1308 * dirty dquots that might be cached, we just want to get rid of them
1309 * and turn quotaoff. The dquots won't be attached to any of the inodes
1310 * at this point (because we intentionally didn't in dqget_noattach).
1313 xfs_qm_dqpurge_all(mp
, XFS_QMOPT_QUOTALL
);
1318 * If one type of quotas is off, then it will lose its
1319 * quotachecked status, since we won't be doing accounting for
1320 * that type anymore.
1322 mp
->m_qflags
&= ~XFS_ALL_QUOTA_CHKD
;
1323 mp
->m_qflags
|= flags
;
1326 while (!list_empty(&buffer_list
)) {
1327 struct xfs_buf
*bp
=
1328 list_first_entry(&buffer_list
, struct xfs_buf
, b_list
);
1329 list_del_init(&bp
->b_list
);
1335 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1338 * We must turn off quotas.
1340 ASSERT(mp
->m_quotainfo
!= NULL
);
1341 xfs_qm_destroy_quotainfo(mp
);
1342 if (xfs_mount_reset_sbqflags(mp
)) {
1344 "Quotacheck: Failed to reset quota flags.");
1347 xfs_notice(mp
, "Quotacheck: Done.");
1352 * This is called after the superblock has been read in and we're ready to
1353 * iget the quota inodes.
1356 xfs_qm_init_quotainos(
1359 xfs_inode_t
*uip
, *gip
;
1364 ASSERT(mp
->m_quotainfo
);
1370 * Get the uquota and gquota inodes
1372 if (xfs_sb_version_hasquota(&mp
->m_sb
)) {
1373 if (XFS_IS_UQUOTA_ON(mp
) &&
1374 mp
->m_sb
.sb_uquotino
!= NULLFSINO
) {
1375 ASSERT(mp
->m_sb
.sb_uquotino
> 0);
1376 if ((error
= xfs_iget(mp
, NULL
, mp
->m_sb
.sb_uquotino
,
1378 return XFS_ERROR(error
);
1380 if (XFS_IS_OQUOTA_ON(mp
) &&
1381 mp
->m_sb
.sb_gquotino
!= NULLFSINO
) {
1382 ASSERT(mp
->m_sb
.sb_gquotino
> 0);
1383 if ((error
= xfs_iget(mp
, NULL
, mp
->m_sb
.sb_gquotino
,
1387 return XFS_ERROR(error
);
1391 flags
|= XFS_QMOPT_SBVERSION
;
1392 sbflags
|= (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
1393 XFS_SB_GQUOTINO
| XFS_SB_QFLAGS
);
1397 * Create the two inodes, if they don't exist already. The changes
1398 * made above will get added to a transaction and logged in one of
1399 * the qino_alloc calls below. If the device is readonly,
1400 * temporarily switch to read-write to do this.
1402 if (XFS_IS_UQUOTA_ON(mp
) && uip
== NULL
) {
1403 if ((error
= xfs_qm_qino_alloc(mp
, &uip
,
1404 sbflags
| XFS_SB_UQUOTINO
,
1405 flags
| XFS_QMOPT_UQUOTA
)))
1406 return XFS_ERROR(error
);
1408 flags
&= ~XFS_QMOPT_SBVERSION
;
1410 if (XFS_IS_OQUOTA_ON(mp
) && gip
== NULL
) {
1411 flags
|= (XFS_IS_GQUOTA_ON(mp
) ?
1412 XFS_QMOPT_GQUOTA
: XFS_QMOPT_PQUOTA
);
1413 error
= xfs_qm_qino_alloc(mp
, &gip
,
1414 sbflags
| XFS_SB_GQUOTINO
, flags
);
1419 return XFS_ERROR(error
);
1423 mp
->m_quotainfo
->qi_uquotaip
= uip
;
1424 mp
->m_quotainfo
->qi_gquotaip
= gip
;
1431 struct xfs_dquot
*dqp
)
1433 struct xfs_mount
*mp
= dqp
->q_mount
;
1434 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
1436 mutex_lock(&qi
->qi_tree_lock
);
1437 radix_tree_delete(XFS_DQUOT_TREE(qi
, dqp
->q_core
.d_flags
),
1438 be32_to_cpu(dqp
->q_core
.d_id
));
1441 mutex_unlock(&qi
->qi_tree_lock
);
1443 xfs_qm_dqdestroy(dqp
);
1447 xfs_qm_dqreclaim_one(
1448 struct xfs_dquot
*dqp
,
1449 struct list_head
*buffer_list
,
1450 struct list_head
*dispose_list
)
1452 struct xfs_mount
*mp
= dqp
->q_mount
;
1453 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
1456 if (!xfs_dqlock_nowait(dqp
))
1460 * This dquot has acquired a reference in the meantime remove it from
1461 * the freelist and try again.
1466 trace_xfs_dqreclaim_want(dqp
);
1467 XFS_STATS_INC(xs_qm_dqwants
);
1469 list_del_init(&dqp
->q_lru
);
1471 XFS_STATS_DEC(xs_qm_dquot_unused
);
1476 * Try to grab the flush lock. If this dquot is in the process of
1477 * getting flushed to disk, we don't want to reclaim it.
1479 if (!xfs_dqflock_nowait(dqp
))
1482 if (XFS_DQ_IS_DIRTY(dqp
)) {
1483 struct xfs_buf
*bp
= NULL
;
1485 trace_xfs_dqreclaim_dirty(dqp
);
1487 error
= xfs_qm_dqflush(dqp
, &bp
);
1489 xfs_warn(mp
, "%s: dquot %p flush failed",
1494 xfs_buf_delwri_queue(bp
, buffer_list
);
1497 * Give the dquot another try on the freelist, as the
1498 * flushing will take some time.
1505 * Prevent lookups now that we are past the point of no return.
1507 dqp
->dq_flags
|= XFS_DQ_FREEING
;
1510 ASSERT(dqp
->q_nrefs
== 0);
1511 list_move_tail(&dqp
->q_lru
, dispose_list
);
1513 XFS_STATS_DEC(xs_qm_dquot_unused
);
1515 trace_xfs_dqreclaim_done(dqp
);
1516 XFS_STATS_INC(xs_qm_dqreclaims
);
1523 * Move the dquot to the tail of the list so that we don't spin on it.
1525 list_move_tail(&dqp
->q_lru
, &qi
->qi_lru_list
);
1527 trace_xfs_dqreclaim_busy(dqp
);
1528 XFS_STATS_INC(xs_qm_dqreclaim_misses
);
1533 struct shrinker
*shrink
,
1534 struct shrink_control
*sc
)
1536 struct xfs_quotainfo
*qi
=
1537 container_of(shrink
, struct xfs_quotainfo
, qi_shrinker
);
1538 int nr_to_scan
= sc
->nr_to_scan
;
1539 LIST_HEAD (buffer_list
);
1540 LIST_HEAD (dispose_list
);
1541 struct xfs_dquot
*dqp
;
1544 if ((sc
->gfp_mask
& (__GFP_FS
|__GFP_WAIT
)) != (__GFP_FS
|__GFP_WAIT
))
1549 mutex_lock(&qi
->qi_lru_lock
);
1550 while (!list_empty(&qi
->qi_lru_list
)) {
1551 if (nr_to_scan
-- <= 0)
1553 dqp
= list_first_entry(&qi
->qi_lru_list
, struct xfs_dquot
,
1555 xfs_qm_dqreclaim_one(dqp
, &buffer_list
, &dispose_list
);
1557 mutex_unlock(&qi
->qi_lru_lock
);
1559 error
= xfs_buf_delwri_submit(&buffer_list
);
1561 xfs_warn(NULL
, "%s: dquot reclaim failed", __func__
);
1563 while (!list_empty(&dispose_list
)) {
1564 dqp
= list_first_entry(&dispose_list
, struct xfs_dquot
, q_lru
);
1565 list_del_init(&dqp
->q_lru
);
1566 xfs_qm_dqfree_one(dqp
);
1570 return (qi
->qi_lru_count
/ 100) * sysctl_vfs_cache_pressure
;
1574 * Start a transaction and write the incore superblock changes to
1575 * disk. flags parameter indicates which fields have changed.
1578 xfs_qm_write_sb_changes(
1585 tp
= xfs_trans_alloc(mp
, XFS_TRANS_QM_SBCHANGE
);
1586 if ((error
= xfs_trans_reserve(tp
, 0,
1587 mp
->m_sb
.sb_sectsize
+ 128, 0,
1589 XFS_DEFAULT_LOG_COUNT
))) {
1590 xfs_trans_cancel(tp
, 0);
1594 xfs_mod_sb(tp
, flags
);
1595 error
= xfs_trans_commit(tp
, 0);
1601 /* --------------- utility functions for vnodeops ---------------- */
1605 * Given an inode, a uid, gid and prid make sure that we have
1606 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1607 * quotas by creating this file.
1608 * This also attaches dquot(s) to the given inode after locking it,
1609 * and returns the dquots corresponding to the uid and/or gid.
1611 * in : inode (unlocked)
1612 * out : udquot, gdquot with references taken and unlocked
1616 struct xfs_inode
*ip
,
1621 struct xfs_dquot
**O_udqpp
,
1622 struct xfs_dquot
**O_gdqpp
)
1624 struct xfs_mount
*mp
= ip
->i_mount
;
1625 struct xfs_dquot
*uq
, *gq
;
1629 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
1632 lockflags
= XFS_ILOCK_EXCL
;
1633 xfs_ilock(ip
, lockflags
);
1635 if ((flags
& XFS_QMOPT_INHERIT
) && XFS_INHERIT_GID(ip
))
1636 gid
= ip
->i_d
.di_gid
;
1639 * Attach the dquot(s) to this inode, doing a dquot allocation
1640 * if necessary. The dquot(s) will not be locked.
1642 if (XFS_NOT_DQATTACHED(mp
, ip
)) {
1643 error
= xfs_qm_dqattach_locked(ip
, XFS_QMOPT_DQALLOC
);
1645 xfs_iunlock(ip
, lockflags
);
1651 if ((flags
& XFS_QMOPT_UQUOTA
) && XFS_IS_UQUOTA_ON(mp
)) {
1652 if (ip
->i_d
.di_uid
!= uid
) {
1654 * What we need is the dquot that has this uid, and
1655 * if we send the inode to dqget, the uid of the inode
1656 * takes priority over what's sent in the uid argument.
1657 * We must unlock inode here before calling dqget if
1658 * we're not sending the inode, because otherwise
1659 * we'll deadlock by doing trans_reserve while
1662 xfs_iunlock(ip
, lockflags
);
1663 if ((error
= xfs_qm_dqget(mp
, NULL
, (xfs_dqid_t
) uid
,
1668 ASSERT(error
!= ENOENT
);
1672 * Get the ilock in the right order.
1675 lockflags
= XFS_ILOCK_SHARED
;
1676 xfs_ilock(ip
, lockflags
);
1679 * Take an extra reference, because we'll return
1682 ASSERT(ip
->i_udquot
);
1683 uq
= xfs_qm_dqhold(ip
->i_udquot
);
1686 if ((flags
& XFS_QMOPT_GQUOTA
) && XFS_IS_GQUOTA_ON(mp
)) {
1687 if (ip
->i_d
.di_gid
!= gid
) {
1688 xfs_iunlock(ip
, lockflags
);
1689 if ((error
= xfs_qm_dqget(mp
, NULL
, (xfs_dqid_t
)gid
,
1696 ASSERT(error
!= ENOENT
);
1700 lockflags
= XFS_ILOCK_SHARED
;
1701 xfs_ilock(ip
, lockflags
);
1703 ASSERT(ip
->i_gdquot
);
1704 gq
= xfs_qm_dqhold(ip
->i_gdquot
);
1706 } else if ((flags
& XFS_QMOPT_PQUOTA
) && XFS_IS_PQUOTA_ON(mp
)) {
1707 if (xfs_get_projid(ip
) != prid
) {
1708 xfs_iunlock(ip
, lockflags
);
1709 if ((error
= xfs_qm_dqget(mp
, NULL
, (xfs_dqid_t
)prid
,
1716 ASSERT(error
!= ENOENT
);
1720 lockflags
= XFS_ILOCK_SHARED
;
1721 xfs_ilock(ip
, lockflags
);
1723 ASSERT(ip
->i_gdquot
);
1724 gq
= xfs_qm_dqhold(ip
->i_gdquot
);
1728 trace_xfs_dquot_dqalloc(ip
);
1730 xfs_iunlock(ip
, lockflags
);
1743 * Actually transfer ownership, and do dquot modifications.
1744 * These were already reserved.
1750 xfs_dquot_t
**IO_olddq
,
1753 xfs_dquot_t
*prevdq
;
1754 uint bfield
= XFS_IS_REALTIME_INODE(ip
) ?
1755 XFS_TRANS_DQ_RTBCOUNT
: XFS_TRANS_DQ_BCOUNT
;
1758 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1759 ASSERT(XFS_IS_QUOTA_RUNNING(ip
->i_mount
));
1764 ASSERT(prevdq
!= newdq
);
1766 xfs_trans_mod_dquot(tp
, prevdq
, bfield
, -(ip
->i_d
.di_nblocks
));
1767 xfs_trans_mod_dquot(tp
, prevdq
, XFS_TRANS_DQ_ICOUNT
, -1);
1769 /* the sparkling new dquot */
1770 xfs_trans_mod_dquot(tp
, newdq
, bfield
, ip
->i_d
.di_nblocks
);
1771 xfs_trans_mod_dquot(tp
, newdq
, XFS_TRANS_DQ_ICOUNT
, 1);
1774 * Take an extra reference, because the inode is going to keep
1775 * this dquot pointer even after the trans_commit.
1777 *IO_olddq
= xfs_qm_dqhold(newdq
);
1783 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1786 xfs_qm_vop_chown_reserve(
1793 xfs_mount_t
*mp
= ip
->i_mount
;
1794 uint delblks
, blkflags
, prjflags
= 0;
1795 xfs_dquot_t
*unresudq
, *unresgdq
, *delblksudq
, *delblksgdq
;
1799 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
));
1800 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1802 delblks
= ip
->i_delayed_blks
;
1803 delblksudq
= delblksgdq
= unresudq
= unresgdq
= NULL
;
1804 blkflags
= XFS_IS_REALTIME_INODE(ip
) ?
1805 XFS_QMOPT_RES_RTBLKS
: XFS_QMOPT_RES_REGBLKS
;
1807 if (XFS_IS_UQUOTA_ON(mp
) && udqp
&&
1808 ip
->i_d
.di_uid
!= (uid_t
)be32_to_cpu(udqp
->q_core
.d_id
)) {
1811 * If there are delayed allocation blocks, then we have to
1812 * unreserve those from the old dquot, and add them to the
1816 ASSERT(ip
->i_udquot
);
1817 unresudq
= ip
->i_udquot
;
1820 if (XFS_IS_OQUOTA_ON(ip
->i_mount
) && gdqp
) {
1821 if (XFS_IS_PQUOTA_ON(ip
->i_mount
) &&
1822 xfs_get_projid(ip
) != be32_to_cpu(gdqp
->q_core
.d_id
))
1823 prjflags
= XFS_QMOPT_ENOSPC
;
1826 (XFS_IS_GQUOTA_ON(ip
->i_mount
) &&
1827 ip
->i_d
.di_gid
!= be32_to_cpu(gdqp
->q_core
.d_id
))) {
1830 ASSERT(ip
->i_gdquot
);
1831 unresgdq
= ip
->i_gdquot
;
1836 if ((error
= xfs_trans_reserve_quota_bydquots(tp
, ip
->i_mount
,
1837 delblksudq
, delblksgdq
, ip
->i_d
.di_nblocks
, 1,
1838 flags
| blkflags
| prjflags
)))
1842 * Do the delayed blks reservations/unreservations now. Since, these
1843 * are done without the help of a transaction, if a reservation fails
1844 * its previous reservations won't be automatically undone by trans
1845 * code. So, we have to do it manually here.
1849 * Do the reservations first. Unreservation can't fail.
1851 ASSERT(delblksudq
|| delblksgdq
);
1852 ASSERT(unresudq
|| unresgdq
);
1853 if ((error
= xfs_trans_reserve_quota_bydquots(NULL
, ip
->i_mount
,
1854 delblksudq
, delblksgdq
, (xfs_qcnt_t
)delblks
, 0,
1855 flags
| blkflags
| prjflags
)))
1857 xfs_trans_reserve_quota_bydquots(NULL
, ip
->i_mount
,
1858 unresudq
, unresgdq
, -((xfs_qcnt_t
)delblks
), 0,
1866 xfs_qm_vop_rename_dqattach(
1867 struct xfs_inode
**i_tab
)
1869 struct xfs_mount
*mp
= i_tab
[0]->i_mount
;
1872 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
1875 for (i
= 0; (i
< 4 && i_tab
[i
]); i
++) {
1876 struct xfs_inode
*ip
= i_tab
[i
];
1880 * Watch out for duplicate entries in the table.
1882 if (i
== 0 || ip
!= i_tab
[i
-1]) {
1883 if (XFS_NOT_DQATTACHED(mp
, ip
)) {
1884 error
= xfs_qm_dqattach(ip
, 0);
1894 xfs_qm_vop_create_dqattach(
1895 struct xfs_trans
*tp
,
1896 struct xfs_inode
*ip
,
1897 struct xfs_dquot
*udqp
,
1898 struct xfs_dquot
*gdqp
)
1900 struct xfs_mount
*mp
= tp
->t_mountp
;
1902 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
1905 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1906 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1909 ASSERT(ip
->i_udquot
== NULL
);
1910 ASSERT(XFS_IS_UQUOTA_ON(mp
));
1911 ASSERT(ip
->i_d
.di_uid
== be32_to_cpu(udqp
->q_core
.d_id
));
1913 ip
->i_udquot
= xfs_qm_dqhold(udqp
);
1914 xfs_trans_mod_dquot(tp
, udqp
, XFS_TRANS_DQ_ICOUNT
, 1);
1917 ASSERT(ip
->i_gdquot
== NULL
);
1918 ASSERT(XFS_IS_OQUOTA_ON(mp
));
1919 ASSERT((XFS_IS_GQUOTA_ON(mp
) ?
1920 ip
->i_d
.di_gid
: xfs_get_projid(ip
)) ==
1921 be32_to_cpu(gdqp
->q_core
.d_id
));
1923 ip
->i_gdquot
= xfs_qm_dqhold(gdqp
);
1924 xfs_trans_mod_dquot(tp
, gdqp
, XFS_TRANS_DQ_ICOUNT
, 1);