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
20 #include "xfs_format.h"
23 #include "xfs_trans.h"
26 #include "xfs_alloc.h"
27 #include "xfs_quota.h"
28 #include "xfs_mount.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_ialloc_btree.h"
31 #include "xfs_dinode.h"
32 #include "xfs_inode.h"
33 #include "xfs_ialloc.h"
34 #include "xfs_itable.h"
35 #include "xfs_rtalloc.h"
36 #include "xfs_error.h"
39 #include "xfs_buf_item.h"
40 #include "xfs_trans_space.h"
42 #include "xfs_trace.h"
43 #include "xfs_icache.h"
44 #include "xfs_cksum.h"
47 * The global quota manager. There is only one of these for the entire
48 * system, _not_ one per file system. XQM keeps track of the overall
49 * quota functionality, including maintaining the freelist and hash
52 STATIC
int xfs_qm_init_quotainos(xfs_mount_t
*);
53 STATIC
int xfs_qm_init_quotainfo(xfs_mount_t
*);
54 STATIC
int xfs_qm_shake(struct shrinker
*, struct shrink_control
*);
57 * We use the batch lookup interface to iterate over the dquots as it
58 * currently is the only interface into the radix tree code that allows
59 * fuzzy lookups instead of exact matches. Holding the lock over multiple
60 * operations is fine as all callers are used either during mount/umount
63 #define XFS_DQ_LOOKUP_BATCH 32
69 int (*execute
)(struct xfs_dquot
*dqp
, void *data
),
72 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
73 struct radix_tree_root
*tree
= xfs_dquot_tree(qi
, type
);
85 struct xfs_dquot
*batch
[XFS_DQ_LOOKUP_BATCH
];
89 mutex_lock(&qi
->qi_tree_lock
);
90 nr_found
= radix_tree_gang_lookup(tree
, (void **)batch
,
91 next_index
, XFS_DQ_LOOKUP_BATCH
);
93 mutex_unlock(&qi
->qi_tree_lock
);
97 for (i
= 0; i
< nr_found
; i
++) {
98 struct xfs_dquot
*dqp
= batch
[i
];
100 next_index
= be32_to_cpu(dqp
->q_core
.d_id
) + 1;
102 error
= execute(batch
[i
], data
);
103 if (error
== EAGAIN
) {
107 if (error
&& last_error
!= EFSCORRUPTED
)
111 mutex_unlock(&qi
->qi_tree_lock
);
113 /* bail out if the filesystem is corrupted. */
114 if (last_error
== EFSCORRUPTED
) {
130 * Purge a dquot from all tracking data structures and free it.
134 struct xfs_dquot
*dqp
,
137 struct xfs_mount
*mp
= dqp
->q_mount
;
138 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
139 struct xfs_dquot
*gdqp
= NULL
;
140 struct xfs_dquot
*pdqp
= NULL
;
143 if ((dqp
->dq_flags
& XFS_DQ_FREEING
) || dqp
->q_nrefs
!= 0) {
149 * If this quota has a hint attached, prepare for releasing it now.
151 gdqp
= dqp
->q_gdquot
;
154 dqp
->q_gdquot
= NULL
;
157 pdqp
= dqp
->q_pdquot
;
160 dqp
->q_pdquot
= NULL
;
163 dqp
->dq_flags
|= XFS_DQ_FREEING
;
168 * If we are turning this type of quotas off, we don't care
169 * about the dirty metadata sitting in this dquot. OTOH, if
170 * we're unmounting, we do care, so we flush it and wait.
172 if (XFS_DQ_IS_DIRTY(dqp
)) {
173 struct xfs_buf
*bp
= NULL
;
177 * We don't care about getting disk errors here. We need
178 * to purge this dquot anyway, so we go ahead regardless.
180 error
= xfs_qm_dqflush(dqp
, &bp
);
182 xfs_warn(mp
, "%s: dquot %p flush failed",
185 error
= xfs_bwrite(bp
);
191 ASSERT(atomic_read(&dqp
->q_pincount
) == 0);
192 ASSERT(XFS_FORCED_SHUTDOWN(mp
) ||
193 !(dqp
->q_logitem
.qli_item
.li_flags
& XFS_LI_IN_AIL
));
198 radix_tree_delete(xfs_dquot_tree(qi
, dqp
->q_core
.d_flags
),
199 be32_to_cpu(dqp
->q_core
.d_id
));
203 * We move dquots to the freelist as soon as their reference count
204 * hits zero, so it really should be on the freelist here.
206 mutex_lock(&qi
->qi_lru_lock
);
207 ASSERT(!list_empty(&dqp
->q_lru
));
208 list_del_init(&dqp
->q_lru
);
210 XFS_STATS_DEC(xs_qm_dquot_unused
);
211 mutex_unlock(&qi
->qi_lru_lock
);
213 xfs_qm_dqdestroy(dqp
);
223 * Purge the dquot cache.
227 struct xfs_mount
*mp
,
230 if (flags
& XFS_QMOPT_UQUOTA
)
231 xfs_qm_dquot_walk(mp
, XFS_DQ_USER
, xfs_qm_dqpurge
, NULL
);
232 if (flags
& XFS_QMOPT_GQUOTA
)
233 xfs_qm_dquot_walk(mp
, XFS_DQ_GROUP
, xfs_qm_dqpurge
, NULL
);
234 if (flags
& XFS_QMOPT_PQUOTA
)
235 xfs_qm_dquot_walk(mp
, XFS_DQ_PROJ
, xfs_qm_dqpurge
, NULL
);
239 * Just destroy the quotainfo structure.
243 struct xfs_mount
*mp
)
245 if (mp
->m_quotainfo
) {
246 xfs_qm_dqpurge_all(mp
, XFS_QMOPT_QUOTALL
);
247 xfs_qm_destroy_quotainfo(mp
);
253 * This is called from xfs_mountfs to start quotas and initialize all
254 * necessary data structures like quotainfo. This is also responsible for
255 * running a quotacheck as necessary. We are guaranteed that the superblock
256 * is consistently read in at this point.
258 * If we fail here, the mount will continue with quota turned off. We don't
259 * need to inidicate success or failure at all.
269 * If quotas on realtime volumes is not supported, we disable
270 * quotas immediately.
272 if (mp
->m_sb
.sb_rextents
) {
273 xfs_notice(mp
, "Cannot turn on quotas for realtime filesystem");
278 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
281 * Allocate the quotainfo structure inside the mount struct, and
282 * create quotainode(s), and change/rev superblock if necessary.
284 error
= xfs_qm_init_quotainfo(mp
);
287 * We must turn off quotas.
289 ASSERT(mp
->m_quotainfo
== NULL
);
294 * If any of the quotas are not consistent, do a quotacheck.
296 if (XFS_QM_NEED_QUOTACHECK(mp
)) {
297 error
= xfs_qm_quotacheck(mp
);
299 /* Quotacheck failed and disabled quotas. */
304 * If one type of quotas is off, then it will lose its
305 * quotachecked status, since we won't be doing accounting for
308 if (!XFS_IS_UQUOTA_ON(mp
))
309 mp
->m_qflags
&= ~XFS_UQUOTA_CHKD
;
310 if (!XFS_IS_GQUOTA_ON(mp
))
311 mp
->m_qflags
&= ~XFS_GQUOTA_CHKD
;
312 if (!XFS_IS_PQUOTA_ON(mp
))
313 mp
->m_qflags
&= ~XFS_PQUOTA_CHKD
;
317 * We actually don't have to acquire the m_sb_lock at all.
318 * This can only be called from mount, and that's single threaded. XXX
320 spin_lock(&mp
->m_sb_lock
);
321 sbf
= mp
->m_sb
.sb_qflags
;
322 mp
->m_sb
.sb_qflags
= mp
->m_qflags
& XFS_MOUNT_QUOTA_ALL
;
323 spin_unlock(&mp
->m_sb_lock
);
325 if (sbf
!= (mp
->m_qflags
& XFS_MOUNT_QUOTA_ALL
)) {
326 if (xfs_qm_write_sb_changes(mp
, XFS_SB_QFLAGS
)) {
328 * We could only have been turning quotas off.
329 * We aren't in very good shape actually because
330 * the incore structures are convinced that quotas are
331 * off, but the on disk superblock doesn't know that !
333 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp
)));
334 xfs_alert(mp
, "%s: Superblock update failed!",
340 xfs_warn(mp
, "Failed to initialize disk quotas.");
346 * Called from the vfsops layer.
349 xfs_qm_unmount_quotas(
353 * Release the dquots that root inode, et al might be holding,
354 * before we flush quotas and blow away the quotainfo structure.
356 ASSERT(mp
->m_rootip
);
357 xfs_qm_dqdetach(mp
->m_rootip
);
359 xfs_qm_dqdetach(mp
->m_rbmip
);
361 xfs_qm_dqdetach(mp
->m_rsumip
);
364 * Release the quota inodes.
366 if (mp
->m_quotainfo
) {
367 if (mp
->m_quotainfo
->qi_uquotaip
) {
368 IRELE(mp
->m_quotainfo
->qi_uquotaip
);
369 mp
->m_quotainfo
->qi_uquotaip
= NULL
;
371 if (mp
->m_quotainfo
->qi_gquotaip
) {
372 IRELE(mp
->m_quotainfo
->qi_gquotaip
);
373 mp
->m_quotainfo
->qi_gquotaip
= NULL
;
375 if (mp
->m_quotainfo
->qi_pquotaip
) {
376 IRELE(mp
->m_quotainfo
->qi_pquotaip
);
377 mp
->m_quotainfo
->qi_pquotaip
= NULL
;
388 xfs_dquot_t
*udqhint
, /* hint */
389 xfs_dquot_t
**IO_idqpp
)
394 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
398 * See if we already have it in the inode itself. IO_idqpp is
399 * &i_udquot or &i_gdquot. This made the code look weird, but
400 * made the logic a lot simpler.
404 trace_xfs_dqattach_found(dqp
);
409 * udqhint is the i_udquot field in inode, and is non-NULL only
410 * when the type arg is group/project. Its purpose is to save a
411 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
415 ASSERT(type
== XFS_DQ_GROUP
|| type
== XFS_DQ_PROJ
);
419 * No need to take dqlock to look at the id.
421 * The ID can't change until it gets reclaimed, and it won't
422 * be reclaimed as long as we have a ref from inode and we
425 if (type
== XFS_DQ_GROUP
)
426 dqp
= udqhint
->q_gdquot
;
428 dqp
= udqhint
->q_pdquot
;
429 if (dqp
&& be32_to_cpu(dqp
->q_core
.d_id
) == id
) {
430 ASSERT(*IO_idqpp
== NULL
);
432 *IO_idqpp
= xfs_qm_dqhold(dqp
);
433 xfs_dqunlock(udqhint
);
438 * We can't hold a dquot lock when we call the dqget code.
439 * We'll deadlock in no time, because of (not conforming to)
440 * lock ordering - the inodelock comes before any dquot lock,
441 * and we may drop and reacquire the ilock in xfs_qm_dqget().
443 xfs_dqunlock(udqhint
);
447 * Find the dquot from somewhere. This bumps the
448 * reference count of dquot and returns it locked.
449 * This can return ENOENT if dquot didn't exist on
450 * disk and we didn't ask it to allocate;
451 * ESRCH if quotas got turned off suddenly.
453 error
= xfs_qm_dqget(ip
->i_mount
, ip
, id
, type
,
454 doalloc
| XFS_QMOPT_DOWARN
, &dqp
);
458 trace_xfs_dqattach_get(dqp
);
461 * dqget may have dropped and re-acquired the ilock, but it guarantees
462 * that the dquot returned is the one that should go in the inode.
471 * Given a udquot and group/project type, attach the group/project
472 * dquot pointer to the udquot as a hint for future lookups.
475 xfs_qm_dqattach_hint(
476 struct xfs_inode
*ip
,
479 struct xfs_dquot
**dqhintp
;
480 struct xfs_dquot
*dqp
;
481 struct xfs_dquot
*udq
= ip
->i_udquot
;
483 ASSERT(type
== XFS_DQ_GROUP
|| type
== XFS_DQ_PROJ
);
487 if (type
== XFS_DQ_GROUP
) {
489 dqhintp
= &udq
->q_gdquot
;
492 dqhintp
= &udq
->q_pdquot
;
496 struct xfs_dquot
*tmp
;
506 *dqhintp
= xfs_qm_dqhold(dqp
);
512 xfs_qm_need_dqattach(
513 struct xfs_inode
*ip
)
515 struct xfs_mount
*mp
= ip
->i_mount
;
517 if (!XFS_IS_QUOTA_RUNNING(mp
))
519 if (!XFS_IS_QUOTA_ON(mp
))
521 if (!XFS_NOT_DQATTACHED(mp
, ip
))
523 if (xfs_is_quota_inode(&mp
->m_sb
, ip
->i_ino
))
529 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
531 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
532 * Inode may get unlocked and relocked in here, and the caller must deal with
536 xfs_qm_dqattach_locked(
540 xfs_mount_t
*mp
= ip
->i_mount
;
544 if (!xfs_qm_need_dqattach(ip
))
547 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
549 if (XFS_IS_UQUOTA_ON(mp
)) {
550 error
= xfs_qm_dqattach_one(ip
, ip
->i_d
.di_uid
, XFS_DQ_USER
,
551 flags
& XFS_QMOPT_DQALLOC
,
552 NULL
, &ip
->i_udquot
);
558 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
559 if (XFS_IS_GQUOTA_ON(mp
)) {
560 error
= xfs_qm_dqattach_one(ip
, ip
->i_d
.di_gid
, XFS_DQ_GROUP
,
561 flags
& XFS_QMOPT_DQALLOC
,
562 ip
->i_udquot
, &ip
->i_gdquot
);
564 * Don't worry about the udquot that we may have
565 * attached above. It'll get detached, if not already.
572 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
573 if (XFS_IS_PQUOTA_ON(mp
)) {
574 error
= xfs_qm_dqattach_one(ip
, xfs_get_projid(ip
), XFS_DQ_PROJ
,
575 flags
& XFS_QMOPT_DQALLOC
,
576 ip
->i_udquot
, &ip
->i_pdquot
);
578 * Don't worry about the udquot that we may have
579 * attached above. It'll get detached, if not already.
587 * Attach this group/project quota to the user quota as a hint.
588 * This WON'T, in general, result in a thrash.
590 if (nquotas
> 1 && ip
->i_udquot
) {
591 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
592 ASSERT(ip
->i_gdquot
|| !XFS_IS_GQUOTA_ON(mp
));
593 ASSERT(ip
->i_pdquot
|| !XFS_IS_PQUOTA_ON(mp
));
596 * We do not have i_udquot locked at this point, but this check
597 * is OK since we don't depend on the i_gdquot to be accurate
598 * 100% all the time. It is just a hint, and this will
599 * succeed in general.
601 if (ip
->i_udquot
->q_gdquot
!= ip
->i_gdquot
)
602 xfs_qm_dqattach_hint(ip
, XFS_DQ_GROUP
);
604 if (ip
->i_udquot
->q_pdquot
!= ip
->i_pdquot
)
605 xfs_qm_dqattach_hint(ip
, XFS_DQ_PROJ
);
611 if (XFS_IS_UQUOTA_ON(mp
))
612 ASSERT(ip
->i_udquot
);
613 if (XFS_IS_GQUOTA_ON(mp
))
614 ASSERT(ip
->i_gdquot
);
615 if (XFS_IS_PQUOTA_ON(mp
))
616 ASSERT(ip
->i_pdquot
);
618 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
625 struct xfs_inode
*ip
,
630 if (!xfs_qm_need_dqattach(ip
))
633 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
634 error
= xfs_qm_dqattach_locked(ip
, flags
);
635 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
641 * Release dquots (and their references) if any.
642 * The inode should be locked EXCL except when this's called by
649 if (!(ip
->i_udquot
|| ip
->i_gdquot
|| ip
->i_pdquot
))
652 trace_xfs_dquot_dqdetach(ip
);
654 ASSERT(!xfs_is_quota_inode(&ip
->i_mount
->m_sb
, ip
->i_ino
));
656 xfs_qm_dqrele(ip
->i_udquot
);
660 xfs_qm_dqrele(ip
->i_gdquot
);
664 xfs_qm_dqrele(ip
->i_pdquot
);
670 xfs_qm_calc_dquots_per_chunk(
671 struct xfs_mount
*mp
,
672 unsigned int nbblks
) /* basic block units */
674 unsigned int ndquots
;
677 ndquots
= BBTOB(nbblks
);
678 do_div(ndquots
, sizeof(xfs_dqblk_t
));
684 * This initializes all the quota information that's kept in the
688 xfs_qm_init_quotainfo(
691 xfs_quotainfo_t
*qinf
;
695 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
697 qinf
= mp
->m_quotainfo
= kmem_zalloc(sizeof(xfs_quotainfo_t
), KM_SLEEP
);
700 * See if quotainodes are setup, and if not, allocate them,
701 * and change the superblock accordingly.
703 if ((error
= xfs_qm_init_quotainos(mp
))) {
705 mp
->m_quotainfo
= NULL
;
709 INIT_RADIX_TREE(&qinf
->qi_uquota_tree
, GFP_NOFS
);
710 INIT_RADIX_TREE(&qinf
->qi_gquota_tree
, GFP_NOFS
);
711 INIT_RADIX_TREE(&qinf
->qi_pquota_tree
, GFP_NOFS
);
712 mutex_init(&qinf
->qi_tree_lock
);
714 INIT_LIST_HEAD(&qinf
->qi_lru_list
);
715 qinf
->qi_lru_count
= 0;
716 mutex_init(&qinf
->qi_lru_lock
);
718 /* mutex used to serialize quotaoffs */
719 mutex_init(&qinf
->qi_quotaofflock
);
721 /* Precalc some constants */
722 qinf
->qi_dqchunklen
= XFS_FSB_TO_BB(mp
, XFS_DQUOT_CLUSTER_SIZE_FSB
);
723 qinf
->qi_dqperchunk
= xfs_qm_calc_dquots_per_chunk(mp
,
724 qinf
->qi_dqchunklen
);
726 mp
->m_qflags
|= (mp
->m_sb
.sb_qflags
& XFS_ALL_QUOTA_CHKD
);
729 * We try to get the limits from the superuser's limits fields.
730 * This is quite hacky, but it is standard quota practice.
732 * We look at the USR dquot with id == 0 first, but if user quotas
733 * are not enabled we goto the GRP dquot with id == 0.
734 * We don't really care to keep separate default limits for user
735 * and group quotas, at least not at this point.
737 * Since we may not have done a quotacheck by this point, just read
738 * the dquot without attaching it to any hashtables or lists.
740 error
= xfs_qm_dqread(mp
, 0,
741 XFS_IS_UQUOTA_RUNNING(mp
) ? XFS_DQ_USER
:
742 (XFS_IS_GQUOTA_RUNNING(mp
) ? XFS_DQ_GROUP
:
744 XFS_QMOPT_DOWARN
, &dqp
);
746 xfs_disk_dquot_t
*ddqp
= &dqp
->q_core
;
749 * The warnings and timers set the grace period given to
750 * a user or group before he or she can not perform any
751 * more writing. If it is zero, a default is used.
753 qinf
->qi_btimelimit
= ddqp
->d_btimer
?
754 be32_to_cpu(ddqp
->d_btimer
) : XFS_QM_BTIMELIMIT
;
755 qinf
->qi_itimelimit
= ddqp
->d_itimer
?
756 be32_to_cpu(ddqp
->d_itimer
) : XFS_QM_ITIMELIMIT
;
757 qinf
->qi_rtbtimelimit
= ddqp
->d_rtbtimer
?
758 be32_to_cpu(ddqp
->d_rtbtimer
) : XFS_QM_RTBTIMELIMIT
;
759 qinf
->qi_bwarnlimit
= ddqp
->d_bwarns
?
760 be16_to_cpu(ddqp
->d_bwarns
) : XFS_QM_BWARNLIMIT
;
761 qinf
->qi_iwarnlimit
= ddqp
->d_iwarns
?
762 be16_to_cpu(ddqp
->d_iwarns
) : XFS_QM_IWARNLIMIT
;
763 qinf
->qi_rtbwarnlimit
= ddqp
->d_rtbwarns
?
764 be16_to_cpu(ddqp
->d_rtbwarns
) : XFS_QM_RTBWARNLIMIT
;
765 qinf
->qi_bhardlimit
= be64_to_cpu(ddqp
->d_blk_hardlimit
);
766 qinf
->qi_bsoftlimit
= be64_to_cpu(ddqp
->d_blk_softlimit
);
767 qinf
->qi_ihardlimit
= be64_to_cpu(ddqp
->d_ino_hardlimit
);
768 qinf
->qi_isoftlimit
= be64_to_cpu(ddqp
->d_ino_softlimit
);
769 qinf
->qi_rtbhardlimit
= be64_to_cpu(ddqp
->d_rtb_hardlimit
);
770 qinf
->qi_rtbsoftlimit
= be64_to_cpu(ddqp
->d_rtb_softlimit
);
772 xfs_qm_dqdestroy(dqp
);
774 qinf
->qi_btimelimit
= XFS_QM_BTIMELIMIT
;
775 qinf
->qi_itimelimit
= XFS_QM_ITIMELIMIT
;
776 qinf
->qi_rtbtimelimit
= XFS_QM_RTBTIMELIMIT
;
777 qinf
->qi_bwarnlimit
= XFS_QM_BWARNLIMIT
;
778 qinf
->qi_iwarnlimit
= XFS_QM_IWARNLIMIT
;
779 qinf
->qi_rtbwarnlimit
= XFS_QM_RTBWARNLIMIT
;
782 qinf
->qi_shrinker
.shrink
= xfs_qm_shake
;
783 qinf
->qi_shrinker
.seeks
= DEFAULT_SEEKS
;
784 register_shrinker(&qinf
->qi_shrinker
);
790 * Gets called when unmounting a filesystem or when all quotas get
792 * This purges the quota inodes, destroys locks and frees itself.
795 xfs_qm_destroy_quotainfo(
800 qi
= mp
->m_quotainfo
;
803 unregister_shrinker(&qi
->qi_shrinker
);
805 if (qi
->qi_uquotaip
) {
806 IRELE(qi
->qi_uquotaip
);
807 qi
->qi_uquotaip
= NULL
; /* paranoia */
809 if (qi
->qi_gquotaip
) {
810 IRELE(qi
->qi_gquotaip
);
811 qi
->qi_gquotaip
= NULL
;
813 if (qi
->qi_pquotaip
) {
814 IRELE(qi
->qi_pquotaip
);
815 qi
->qi_pquotaip
= NULL
;
817 mutex_destroy(&qi
->qi_quotaofflock
);
819 mp
->m_quotainfo
= NULL
;
823 * Create an inode and return with a reference already taken, but unlocked
824 * This is how we create quota inodes
839 * With superblock that doesn't have separate pquotino, we
840 * share an inode between gquota and pquota. If the on-disk
841 * superblock has GQUOTA and the filesystem is now mounted
842 * with PQUOTA, just use sb_gquotino for sb_pquotino and
845 if (!xfs_sb_version_has_pquotino(&mp
->m_sb
) &&
846 (flags
& (XFS_QMOPT_PQUOTA
|XFS_QMOPT_GQUOTA
))) {
847 xfs_ino_t ino
= NULLFSINO
;
849 if ((flags
& XFS_QMOPT_PQUOTA
) &&
850 (mp
->m_sb
.sb_gquotino
!= NULLFSINO
)) {
851 ino
= mp
->m_sb
.sb_gquotino
;
852 ASSERT(mp
->m_sb
.sb_pquotino
== NULLFSINO
);
853 } else if ((flags
& XFS_QMOPT_GQUOTA
) &&
854 (mp
->m_sb
.sb_pquotino
!= NULLFSINO
)) {
855 ino
= mp
->m_sb
.sb_pquotino
;
856 ASSERT(mp
->m_sb
.sb_gquotino
== NULLFSINO
);
858 if (ino
!= NULLFSINO
) {
859 error
= xfs_iget(mp
, NULL
, ino
, 0, 0, ip
);
862 mp
->m_sb
.sb_gquotino
= NULLFSINO
;
863 mp
->m_sb
.sb_pquotino
= NULLFSINO
;
867 tp
= xfs_trans_alloc(mp
, XFS_TRANS_QM_QINOCREATE
);
868 error
= xfs_trans_reserve(tp
, &M_RES(mp
)->tr_create
,
869 XFS_QM_QINOCREATE_SPACE_RES(mp
), 0);
871 xfs_trans_cancel(tp
, 0);
876 error
= xfs_dir_ialloc(&tp
, NULL
, S_IFREG
, 1, 0, 0, 1, ip
,
879 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
|
886 * Make the changes in the superblock, and log those too.
887 * sbfields arg may contain fields other than *QUOTINO;
888 * VERSIONNUM for example.
890 spin_lock(&mp
->m_sb_lock
);
891 if (flags
& XFS_QMOPT_SBVERSION
) {
892 ASSERT(!xfs_sb_version_hasquota(&mp
->m_sb
));
893 ASSERT((sbfields
& (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
894 XFS_SB_GQUOTINO
| XFS_SB_PQUOTINO
| XFS_SB_QFLAGS
)) ==
895 (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
896 XFS_SB_GQUOTINO
| XFS_SB_PQUOTINO
|
899 xfs_sb_version_addquota(&mp
->m_sb
);
900 mp
->m_sb
.sb_uquotino
= NULLFSINO
;
901 mp
->m_sb
.sb_gquotino
= NULLFSINO
;
902 mp
->m_sb
.sb_pquotino
= NULLFSINO
;
904 /* qflags will get updated fully _after_ quotacheck */
905 mp
->m_sb
.sb_qflags
= mp
->m_qflags
& XFS_ALL_QUOTA_ACCT
;
907 if (flags
& XFS_QMOPT_UQUOTA
)
908 mp
->m_sb
.sb_uquotino
= (*ip
)->i_ino
;
909 else if (flags
& XFS_QMOPT_GQUOTA
)
910 mp
->m_sb
.sb_gquotino
= (*ip
)->i_ino
;
912 mp
->m_sb
.sb_pquotino
= (*ip
)->i_ino
;
913 spin_unlock(&mp
->m_sb_lock
);
914 xfs_mod_sb(tp
, sbfields
);
916 if ((error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
))) {
917 xfs_alert(mp
, "%s failed (error %d)!", __func__
, error
);
925 xfs_qm_reset_dqcounts(
931 struct xfs_dqblk
*dqb
;
934 trace_xfs_reset_dqcounts(bp
, _RET_IP_
);
937 * Reset all counters and timers. They'll be
938 * started afresh by xfs_qm_quotacheck.
941 j
= XFS_FSB_TO_B(mp
, XFS_DQUOT_CLUSTER_SIZE_FSB
);
942 do_div(j
, sizeof(xfs_dqblk_t
));
943 ASSERT(mp
->m_quotainfo
->qi_dqperchunk
== j
);
946 for (j
= 0; j
< mp
->m_quotainfo
->qi_dqperchunk
; j
++) {
947 struct xfs_disk_dquot
*ddq
;
949 ddq
= (struct xfs_disk_dquot
*)&dqb
[j
];
952 * Do a sanity check, and if needed, repair the dqblk. Don't
953 * output any warnings because it's perfectly possible to
954 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
956 (void) xfs_qm_dqcheck(mp
, ddq
, id
+j
, type
, XFS_QMOPT_DQREPAIR
,
968 if (xfs_sb_version_hascrc(&mp
->m_sb
)) {
969 xfs_update_cksum((char *)&dqb
[j
],
970 sizeof(struct xfs_dqblk
),
978 struct xfs_mount
*mp
,
981 xfs_filblks_t blkcnt
,
983 struct list_head
*buffer_list
)
990 type
= flags
& XFS_QMOPT_UQUOTA
? XFS_DQ_USER
:
991 (flags
& XFS_QMOPT_PQUOTA
? XFS_DQ_PROJ
: XFS_DQ_GROUP
);
995 * Blkcnt arg can be a very big number, and might even be
996 * larger than the log itself. So, we have to break it up into
997 * manageable-sized transactions.
998 * Note that we don't start a permanent transaction here; we might
999 * not be able to get a log reservation for the whole thing up front,
1000 * and we don't really care to either, because we just discard
1001 * everything if we were to crash in the middle of this loop.
1004 error
= xfs_trans_read_buf(mp
, NULL
, mp
->m_ddev_targp
,
1005 XFS_FSB_TO_DADDR(mp
, bno
),
1006 mp
->m_quotainfo
->qi_dqchunklen
, 0, &bp
,
1007 &xfs_dquot_buf_ops
);
1010 * CRC and validation errors will return a EFSCORRUPTED here. If
1011 * this occurs, re-read without CRC validation so that we can
1012 * repair the damage via xfs_qm_reset_dqcounts(). This process
1013 * will leave a trace in the log indicating corruption has
1016 if (error
== EFSCORRUPTED
) {
1017 error
= xfs_trans_read_buf(mp
, NULL
, mp
->m_ddev_targp
,
1018 XFS_FSB_TO_DADDR(mp
, bno
),
1019 mp
->m_quotainfo
->qi_dqchunklen
, 0, &bp
,
1026 xfs_qm_reset_dqcounts(mp
, bp
, firstid
, type
);
1027 xfs_buf_delwri_queue(bp
, buffer_list
);
1030 /* goto the next block. */
1032 firstid
+= mp
->m_quotainfo
->qi_dqperchunk
;
1039 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1040 * caller supplied function for every chunk of dquots that we find.
1044 struct xfs_mount
*mp
,
1045 struct xfs_inode
*qip
,
1047 struct list_head
*buffer_list
)
1049 struct xfs_bmbt_irec
*map
;
1050 int i
, nmaps
; /* number of map entries */
1051 int error
; /* return value */
1052 xfs_fileoff_t lblkno
;
1053 xfs_filblks_t maxlblkcnt
;
1055 xfs_fsblock_t rablkno
;
1056 xfs_filblks_t rablkcnt
;
1060 * This looks racy, but we can't keep an inode lock across a
1061 * trans_reserve. But, this gets called during quotacheck, and that
1062 * happens only at mount time which is single threaded.
1064 if (qip
->i_d
.di_nblocks
== 0)
1067 map
= kmem_alloc(XFS_DQITER_MAP_SIZE
* sizeof(*map
), KM_SLEEP
);
1070 maxlblkcnt
= XFS_B_TO_FSB(mp
, mp
->m_super
->s_maxbytes
);
1072 nmaps
= XFS_DQITER_MAP_SIZE
;
1074 * We aren't changing the inode itself. Just changing
1075 * some of its data. No new blocks are added here, and
1076 * the inode is never added to the transaction.
1078 xfs_ilock(qip
, XFS_ILOCK_SHARED
);
1079 error
= xfs_bmapi_read(qip
, lblkno
, maxlblkcnt
- lblkno
,
1081 xfs_iunlock(qip
, XFS_ILOCK_SHARED
);
1085 ASSERT(nmaps
<= XFS_DQITER_MAP_SIZE
);
1086 for (i
= 0; i
< nmaps
; i
++) {
1087 ASSERT(map
[i
].br_startblock
!= DELAYSTARTBLOCK
);
1088 ASSERT(map
[i
].br_blockcount
);
1091 lblkno
+= map
[i
].br_blockcount
;
1093 if (map
[i
].br_startblock
== HOLESTARTBLOCK
)
1096 firstid
= (xfs_dqid_t
) map
[i
].br_startoff
*
1097 mp
->m_quotainfo
->qi_dqperchunk
;
1099 * Do a read-ahead on the next extent.
1101 if ((i
+1 < nmaps
) &&
1102 (map
[i
+1].br_startblock
!= HOLESTARTBLOCK
)) {
1103 rablkcnt
= map
[i
+1].br_blockcount
;
1104 rablkno
= map
[i
+1].br_startblock
;
1105 while (rablkcnt
--) {
1106 xfs_buf_readahead(mp
->m_ddev_targp
,
1107 XFS_FSB_TO_DADDR(mp
, rablkno
),
1108 mp
->m_quotainfo
->qi_dqchunklen
,
1114 * Iterate thru all the blks in the extent and
1115 * reset the counters of all the dquots inside them.
1117 error
= xfs_qm_dqiter_bufs(mp
, firstid
,
1118 map
[i
].br_startblock
,
1119 map
[i
].br_blockcount
,
1120 flags
, buffer_list
);
1124 } while (nmaps
> 0);
1132 * Called by dqusage_adjust in doing a quotacheck.
1134 * Given the inode, and a dquot id this updates both the incore dqout as well
1135 * as the buffer copy. This is so that once the quotacheck is done, we can
1136 * just log all the buffers, as opposed to logging numerous updates to
1137 * individual dquots.
1140 xfs_qm_quotacheck_dqadjust(
1141 struct xfs_inode
*ip
,
1147 struct xfs_mount
*mp
= ip
->i_mount
;
1148 struct xfs_dquot
*dqp
;
1151 error
= xfs_qm_dqget(mp
, ip
, id
, type
,
1152 XFS_QMOPT_DQALLOC
| XFS_QMOPT_DOWARN
, &dqp
);
1155 * Shouldn't be able to turn off quotas here.
1157 ASSERT(error
!= ESRCH
);
1158 ASSERT(error
!= ENOENT
);
1162 trace_xfs_dqadjust(dqp
);
1165 * Adjust the inode count and the block count to reflect this inode's
1168 be64_add_cpu(&dqp
->q_core
.d_icount
, 1);
1169 dqp
->q_res_icount
++;
1171 be64_add_cpu(&dqp
->q_core
.d_bcount
, nblks
);
1172 dqp
->q_res_bcount
+= nblks
;
1175 be64_add_cpu(&dqp
->q_core
.d_rtbcount
, rtblks
);
1176 dqp
->q_res_rtbcount
+= rtblks
;
1180 * Set default limits, adjust timers (since we changed usages)
1182 * There are no timers for the default values set in the root dquot.
1184 if (dqp
->q_core
.d_id
) {
1185 xfs_qm_adjust_dqlimits(mp
, dqp
);
1186 xfs_qm_adjust_dqtimers(mp
, &dqp
->q_core
);
1189 dqp
->dq_flags
|= XFS_DQ_DIRTY
;
1197 xfs_qcnt_t
*O_rtblks
)
1199 xfs_filblks_t rtblks
; /* total rt blks */
1200 xfs_extnum_t idx
; /* extent record index */
1201 xfs_ifork_t
*ifp
; /* inode fork pointer */
1202 xfs_extnum_t nextents
; /* number of extent entries */
1205 ASSERT(XFS_IS_REALTIME_INODE(ip
));
1206 ifp
= XFS_IFORK_PTR(ip
, XFS_DATA_FORK
);
1207 if (!(ifp
->if_flags
& XFS_IFEXTENTS
)) {
1208 if ((error
= xfs_iread_extents(NULL
, ip
, XFS_DATA_FORK
)))
1212 nextents
= ifp
->if_bytes
/ (uint
)sizeof(xfs_bmbt_rec_t
);
1213 for (idx
= 0; idx
< nextents
; idx
++)
1214 rtblks
+= xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp
, idx
));
1215 *O_rtblks
= (xfs_qcnt_t
)rtblks
;
1220 * callback routine supplied to bulkstat(). Given an inumber, find its
1221 * dquots and update them to account for resources taken by that inode.
1225 xfs_qm_dqusage_adjust(
1226 xfs_mount_t
*mp
, /* mount point for filesystem */
1227 xfs_ino_t ino
, /* inode number to get data for */
1228 void __user
*buffer
, /* not used */
1229 int ubsize
, /* not used */
1230 int *ubused
, /* not used */
1231 int *res
) /* result code value */
1234 xfs_qcnt_t nblks
, rtblks
= 0;
1237 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1240 * rootino must have its resources accounted for, not so with the quota
1243 if (xfs_is_quota_inode(&mp
->m_sb
, ino
)) {
1244 *res
= BULKSTAT_RV_NOTHING
;
1245 return XFS_ERROR(EINVAL
);
1249 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1250 * interface expects the inode to be exclusively locked because that's
1251 * the case in all other instances. It's OK that we do this because
1252 * quotacheck is done only at mount time.
1254 error
= xfs_iget(mp
, NULL
, ino
, 0, XFS_ILOCK_EXCL
, &ip
);
1256 *res
= BULKSTAT_RV_NOTHING
;
1260 ASSERT(ip
->i_delayed_blks
== 0);
1262 if (XFS_IS_REALTIME_INODE(ip
)) {
1264 * Walk thru the extent list and count the realtime blocks.
1266 error
= xfs_qm_get_rtblks(ip
, &rtblks
);
1271 nblks
= (xfs_qcnt_t
)ip
->i_d
.di_nblocks
- rtblks
;
1274 * Add the (disk blocks and inode) resources occupied by this
1275 * inode to its dquots. We do this adjustment in the incore dquot,
1276 * and also copy the changes to its buffer.
1277 * We don't care about putting these changes in a transaction
1278 * envelope because if we crash in the middle of a 'quotacheck'
1279 * we have to start from the beginning anyway.
1280 * Once we're done, we'll log all the dquot bufs.
1282 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1283 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1285 if (XFS_IS_UQUOTA_ON(mp
)) {
1286 error
= xfs_qm_quotacheck_dqadjust(ip
, ip
->i_d
.di_uid
,
1287 XFS_DQ_USER
, nblks
, rtblks
);
1292 if (XFS_IS_GQUOTA_ON(mp
)) {
1293 error
= xfs_qm_quotacheck_dqadjust(ip
, ip
->i_d
.di_gid
,
1294 XFS_DQ_GROUP
, nblks
, rtblks
);
1299 if (XFS_IS_PQUOTA_ON(mp
)) {
1300 error
= xfs_qm_quotacheck_dqadjust(ip
, xfs_get_projid(ip
),
1301 XFS_DQ_PROJ
, nblks
, rtblks
);
1306 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1308 *res
= BULKSTAT_RV_DIDONE
;
1312 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1314 *res
= BULKSTAT_RV_GIVEUP
;
1320 struct xfs_dquot
*dqp
,
1323 struct list_head
*buffer_list
= data
;
1324 struct xfs_buf
*bp
= NULL
;
1328 if (dqp
->dq_flags
& XFS_DQ_FREEING
)
1330 if (!XFS_DQ_IS_DIRTY(dqp
))
1334 error
= xfs_qm_dqflush(dqp
, &bp
);
1338 xfs_buf_delwri_queue(bp
, buffer_list
);
1346 * Walk thru all the filesystem inodes and construct a consistent view
1347 * of the disk quota world. If the quotacheck fails, disable quotas.
1353 int done
, count
, error
, error2
;
1357 LIST_HEAD (buffer_list
);
1358 struct xfs_inode
*uip
= mp
->m_quotainfo
->qi_uquotaip
;
1359 struct xfs_inode
*gip
= mp
->m_quotainfo
->qi_gquotaip
;
1360 struct xfs_inode
*pip
= mp
->m_quotainfo
->qi_pquotaip
;
1367 ASSERT(uip
|| gip
|| pip
);
1368 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1370 xfs_notice(mp
, "Quotacheck needed: Please wait.");
1373 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1374 * their counters to zero. We need a clean slate.
1375 * We don't log our changes till later.
1378 error
= xfs_qm_dqiterate(mp
, uip
, XFS_QMOPT_UQUOTA
,
1382 flags
|= XFS_UQUOTA_CHKD
;
1386 error
= xfs_qm_dqiterate(mp
, gip
, XFS_QMOPT_GQUOTA
,
1390 flags
|= XFS_GQUOTA_CHKD
;
1394 error
= xfs_qm_dqiterate(mp
, pip
, XFS_QMOPT_PQUOTA
,
1398 flags
|= XFS_PQUOTA_CHKD
;
1403 * Iterate thru all the inodes in the file system,
1404 * adjusting the corresponding dquot counters in core.
1406 error
= xfs_bulkstat(mp
, &lastino
, &count
,
1407 xfs_qm_dqusage_adjust
,
1408 structsz
, NULL
, &done
);
1415 * We've made all the changes that we need to make incore. Flush them
1416 * down to disk buffers if everything was updated successfully.
1418 if (XFS_IS_UQUOTA_ON(mp
)) {
1419 error
= xfs_qm_dquot_walk(mp
, XFS_DQ_USER
, xfs_qm_flush_one
,
1422 if (XFS_IS_GQUOTA_ON(mp
)) {
1423 error2
= xfs_qm_dquot_walk(mp
, XFS_DQ_GROUP
, xfs_qm_flush_one
,
1428 if (XFS_IS_PQUOTA_ON(mp
)) {
1429 error2
= xfs_qm_dquot_walk(mp
, XFS_DQ_PROJ
, xfs_qm_flush_one
,
1435 error2
= xfs_buf_delwri_submit(&buffer_list
);
1440 * We can get this error if we couldn't do a dquot allocation inside
1441 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1442 * dirty dquots that might be cached, we just want to get rid of them
1443 * and turn quotaoff. The dquots won't be attached to any of the inodes
1444 * at this point (because we intentionally didn't in dqget_noattach).
1447 xfs_qm_dqpurge_all(mp
, XFS_QMOPT_QUOTALL
);
1452 * If one type of quotas is off, then it will lose its
1453 * quotachecked status, since we won't be doing accounting for
1454 * that type anymore.
1456 mp
->m_qflags
&= ~XFS_ALL_QUOTA_CHKD
;
1457 mp
->m_qflags
|= flags
;
1460 while (!list_empty(&buffer_list
)) {
1461 struct xfs_buf
*bp
=
1462 list_first_entry(&buffer_list
, struct xfs_buf
, b_list
);
1463 list_del_init(&bp
->b_list
);
1469 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1472 * We must turn off quotas.
1474 ASSERT(mp
->m_quotainfo
!= NULL
);
1475 xfs_qm_destroy_quotainfo(mp
);
1476 if (xfs_mount_reset_sbqflags(mp
)) {
1478 "Quotacheck: Failed to reset quota flags.");
1481 xfs_notice(mp
, "Quotacheck: Done.");
1486 * This is called after the superblock has been read in and we're ready to
1487 * iget the quota inodes.
1490 xfs_qm_init_quotainos(
1493 struct xfs_inode
*uip
= NULL
;
1494 struct xfs_inode
*gip
= NULL
;
1495 struct xfs_inode
*pip
= NULL
;
1497 __int64_t sbflags
= 0;
1500 ASSERT(mp
->m_quotainfo
);
1503 * Get the uquota and gquota inodes
1505 if (xfs_sb_version_hasquota(&mp
->m_sb
)) {
1506 if (XFS_IS_UQUOTA_ON(mp
) &&
1507 mp
->m_sb
.sb_uquotino
!= NULLFSINO
) {
1508 ASSERT(mp
->m_sb
.sb_uquotino
> 0);
1509 error
= xfs_iget(mp
, NULL
, mp
->m_sb
.sb_uquotino
,
1512 return XFS_ERROR(error
);
1514 if (XFS_IS_GQUOTA_ON(mp
) &&
1515 mp
->m_sb
.sb_gquotino
!= NULLFSINO
) {
1516 ASSERT(mp
->m_sb
.sb_gquotino
> 0);
1517 error
= xfs_iget(mp
, NULL
, mp
->m_sb
.sb_gquotino
,
1522 if (XFS_IS_PQUOTA_ON(mp
) &&
1523 mp
->m_sb
.sb_pquotino
!= NULLFSINO
) {
1524 ASSERT(mp
->m_sb
.sb_pquotino
> 0);
1525 error
= xfs_iget(mp
, NULL
, mp
->m_sb
.sb_pquotino
,
1531 flags
|= XFS_QMOPT_SBVERSION
;
1532 sbflags
|= (XFS_SB_VERSIONNUM
| XFS_SB_UQUOTINO
|
1533 XFS_SB_GQUOTINO
| XFS_SB_PQUOTINO
|
1538 * Create the three inodes, if they don't exist already. The changes
1539 * made above will get added to a transaction and logged in one of
1540 * the qino_alloc calls below. If the device is readonly,
1541 * temporarily switch to read-write to do this.
1543 if (XFS_IS_UQUOTA_ON(mp
) && uip
== NULL
) {
1544 error
= xfs_qm_qino_alloc(mp
, &uip
,
1545 sbflags
| XFS_SB_UQUOTINO
,
1546 flags
| XFS_QMOPT_UQUOTA
);
1550 flags
&= ~XFS_QMOPT_SBVERSION
;
1552 if (XFS_IS_GQUOTA_ON(mp
) && gip
== NULL
) {
1553 error
= xfs_qm_qino_alloc(mp
, &gip
,
1554 sbflags
| XFS_SB_GQUOTINO
,
1555 flags
| XFS_QMOPT_GQUOTA
);
1559 flags
&= ~XFS_QMOPT_SBVERSION
;
1561 if (XFS_IS_PQUOTA_ON(mp
) && pip
== NULL
) {
1562 error
= xfs_qm_qino_alloc(mp
, &pip
,
1563 sbflags
| XFS_SB_PQUOTINO
,
1564 flags
| XFS_QMOPT_PQUOTA
);
1569 mp
->m_quotainfo
->qi_uquotaip
= uip
;
1570 mp
->m_quotainfo
->qi_gquotaip
= gip
;
1571 mp
->m_quotainfo
->qi_pquotaip
= pip
;
1582 return XFS_ERROR(error
);
1587 struct xfs_dquot
*dqp
)
1589 struct xfs_mount
*mp
= dqp
->q_mount
;
1590 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
1592 mutex_lock(&qi
->qi_tree_lock
);
1593 radix_tree_delete(xfs_dquot_tree(qi
, dqp
->q_core
.d_flags
),
1594 be32_to_cpu(dqp
->q_core
.d_id
));
1597 mutex_unlock(&qi
->qi_tree_lock
);
1599 xfs_qm_dqdestroy(dqp
);
1603 xfs_qm_dqreclaim_one(
1604 struct xfs_dquot
*dqp
,
1605 struct list_head
*buffer_list
,
1606 struct list_head
*dispose_list
)
1608 struct xfs_mount
*mp
= dqp
->q_mount
;
1609 struct xfs_quotainfo
*qi
= mp
->m_quotainfo
;
1612 if (!xfs_dqlock_nowait(dqp
))
1616 * This dquot has acquired a reference in the meantime remove it from
1617 * the freelist and try again.
1622 trace_xfs_dqreclaim_want(dqp
);
1623 XFS_STATS_INC(xs_qm_dqwants
);
1625 list_del_init(&dqp
->q_lru
);
1627 XFS_STATS_DEC(xs_qm_dquot_unused
);
1632 * Try to grab the flush lock. If this dquot is in the process of
1633 * getting flushed to disk, we don't want to reclaim it.
1635 if (!xfs_dqflock_nowait(dqp
))
1636 goto out_unlock_move_tail
;
1638 if (XFS_DQ_IS_DIRTY(dqp
)) {
1639 struct xfs_buf
*bp
= NULL
;
1641 trace_xfs_dqreclaim_dirty(dqp
);
1643 error
= xfs_qm_dqflush(dqp
, &bp
);
1645 xfs_warn(mp
, "%s: dquot %p flush failed",
1647 goto out_unlock_move_tail
;
1650 xfs_buf_delwri_queue(bp
, buffer_list
);
1653 * Give the dquot another try on the freelist, as the
1654 * flushing will take some time.
1656 goto out_unlock_move_tail
;
1661 * Prevent lookups now that we are past the point of no return.
1663 dqp
->dq_flags
|= XFS_DQ_FREEING
;
1666 ASSERT(dqp
->q_nrefs
== 0);
1667 list_move_tail(&dqp
->q_lru
, dispose_list
);
1669 XFS_STATS_DEC(xs_qm_dquot_unused
);
1671 trace_xfs_dqreclaim_done(dqp
);
1672 XFS_STATS_INC(xs_qm_dqreclaims
);
1676 * Move the dquot to the tail of the list so that we don't spin on it.
1678 out_unlock_move_tail
:
1681 list_move_tail(&dqp
->q_lru
, &qi
->qi_lru_list
);
1682 trace_xfs_dqreclaim_busy(dqp
);
1683 XFS_STATS_INC(xs_qm_dqreclaim_misses
);
1688 struct shrinker
*shrink
,
1689 struct shrink_control
*sc
)
1691 struct xfs_quotainfo
*qi
=
1692 container_of(shrink
, struct xfs_quotainfo
, qi_shrinker
);
1693 int nr_to_scan
= sc
->nr_to_scan
;
1694 LIST_HEAD (buffer_list
);
1695 LIST_HEAD (dispose_list
);
1696 struct xfs_dquot
*dqp
;
1699 if ((sc
->gfp_mask
& (__GFP_FS
|__GFP_WAIT
)) != (__GFP_FS
|__GFP_WAIT
))
1704 mutex_lock(&qi
->qi_lru_lock
);
1705 while (!list_empty(&qi
->qi_lru_list
)) {
1706 if (nr_to_scan
-- <= 0)
1708 dqp
= list_first_entry(&qi
->qi_lru_list
, struct xfs_dquot
,
1710 xfs_qm_dqreclaim_one(dqp
, &buffer_list
, &dispose_list
);
1712 mutex_unlock(&qi
->qi_lru_lock
);
1714 error
= xfs_buf_delwri_submit(&buffer_list
);
1716 xfs_warn(NULL
, "%s: dquot reclaim failed", __func__
);
1718 while (!list_empty(&dispose_list
)) {
1719 dqp
= list_first_entry(&dispose_list
, struct xfs_dquot
, q_lru
);
1720 list_del_init(&dqp
->q_lru
);
1721 xfs_qm_dqfree_one(dqp
);
1725 return (qi
->qi_lru_count
/ 100) * sysctl_vfs_cache_pressure
;
1729 * Start a transaction and write the incore superblock changes to
1730 * disk. flags parameter indicates which fields have changed.
1733 xfs_qm_write_sb_changes(
1740 tp
= xfs_trans_alloc(mp
, XFS_TRANS_QM_SBCHANGE
);
1741 error
= xfs_trans_reserve(tp
, &M_RES(mp
)->tr_qm_sbchange
, 0, 0);
1743 xfs_trans_cancel(tp
, 0);
1747 xfs_mod_sb(tp
, flags
);
1748 error
= xfs_trans_commit(tp
, 0);
1754 /* --------------- utility functions for vnodeops ---------------- */
1758 * Given an inode, a uid, gid and prid make sure that we have
1759 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1760 * quotas by creating this file.
1761 * This also attaches dquot(s) to the given inode after locking it,
1762 * and returns the dquots corresponding to the uid and/or gid.
1764 * in : inode (unlocked)
1765 * out : udquot, gdquot with references taken and unlocked
1769 struct xfs_inode
*ip
,
1774 struct xfs_dquot
**O_udqpp
,
1775 struct xfs_dquot
**O_gdqpp
,
1776 struct xfs_dquot
**O_pdqpp
)
1778 struct xfs_mount
*mp
= ip
->i_mount
;
1779 struct xfs_dquot
*uq
= NULL
;
1780 struct xfs_dquot
*gq
= NULL
;
1781 struct xfs_dquot
*pq
= NULL
;
1785 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
1788 lockflags
= XFS_ILOCK_EXCL
;
1789 xfs_ilock(ip
, lockflags
);
1791 if ((flags
& XFS_QMOPT_INHERIT
) && XFS_INHERIT_GID(ip
))
1792 gid
= ip
->i_d
.di_gid
;
1795 * Attach the dquot(s) to this inode, doing a dquot allocation
1796 * if necessary. The dquot(s) will not be locked.
1798 if (XFS_NOT_DQATTACHED(mp
, ip
)) {
1799 error
= xfs_qm_dqattach_locked(ip
, XFS_QMOPT_DQALLOC
);
1801 xfs_iunlock(ip
, lockflags
);
1806 if ((flags
& XFS_QMOPT_UQUOTA
) && XFS_IS_UQUOTA_ON(mp
)) {
1807 if (ip
->i_d
.di_uid
!= uid
) {
1809 * What we need is the dquot that has this uid, and
1810 * if we send the inode to dqget, the uid of the inode
1811 * takes priority over what's sent in the uid argument.
1812 * We must unlock inode here before calling dqget if
1813 * we're not sending the inode, because otherwise
1814 * we'll deadlock by doing trans_reserve while
1817 xfs_iunlock(ip
, lockflags
);
1818 error
= xfs_qm_dqget(mp
, NULL
, uid
,
1824 ASSERT(error
!= ENOENT
);
1828 * Get the ilock in the right order.
1831 lockflags
= XFS_ILOCK_SHARED
;
1832 xfs_ilock(ip
, lockflags
);
1835 * Take an extra reference, because we'll return
1838 ASSERT(ip
->i_udquot
);
1839 uq
= xfs_qm_dqhold(ip
->i_udquot
);
1842 if ((flags
& XFS_QMOPT_GQUOTA
) && XFS_IS_GQUOTA_ON(mp
)) {
1843 if (ip
->i_d
.di_gid
!= gid
) {
1844 xfs_iunlock(ip
, lockflags
);
1845 error
= xfs_qm_dqget(mp
, NULL
, gid
,
1851 ASSERT(error
!= ENOENT
);
1855 lockflags
= XFS_ILOCK_SHARED
;
1856 xfs_ilock(ip
, lockflags
);
1858 ASSERT(ip
->i_gdquot
);
1859 gq
= xfs_qm_dqhold(ip
->i_gdquot
);
1862 if ((flags
& XFS_QMOPT_PQUOTA
) && XFS_IS_PQUOTA_ON(mp
)) {
1863 if (xfs_get_projid(ip
) != prid
) {
1864 xfs_iunlock(ip
, lockflags
);
1865 error
= xfs_qm_dqget(mp
, NULL
, (xfs_dqid_t
)prid
,
1871 ASSERT(error
!= ENOENT
);
1875 lockflags
= XFS_ILOCK_SHARED
;
1876 xfs_ilock(ip
, lockflags
);
1878 ASSERT(ip
->i_pdquot
);
1879 pq
= xfs_qm_dqhold(ip
->i_pdquot
);
1883 trace_xfs_dquot_dqalloc(ip
);
1885 xfs_iunlock(ip
, lockflags
);
1909 * Actually transfer ownership, and do dquot modifications.
1910 * These were already reserved.
1916 xfs_dquot_t
**IO_olddq
,
1919 xfs_dquot_t
*prevdq
;
1920 uint bfield
= XFS_IS_REALTIME_INODE(ip
) ?
1921 XFS_TRANS_DQ_RTBCOUNT
: XFS_TRANS_DQ_BCOUNT
;
1924 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1925 ASSERT(XFS_IS_QUOTA_RUNNING(ip
->i_mount
));
1930 ASSERT(prevdq
!= newdq
);
1932 xfs_trans_mod_dquot(tp
, prevdq
, bfield
, -(ip
->i_d
.di_nblocks
));
1933 xfs_trans_mod_dquot(tp
, prevdq
, XFS_TRANS_DQ_ICOUNT
, -1);
1935 /* the sparkling new dquot */
1936 xfs_trans_mod_dquot(tp
, newdq
, bfield
, ip
->i_d
.di_nblocks
);
1937 xfs_trans_mod_dquot(tp
, newdq
, XFS_TRANS_DQ_ICOUNT
, 1);
1940 * Take an extra reference, because the inode is going to keep
1941 * this dquot pointer even after the trans_commit.
1943 *IO_olddq
= xfs_qm_dqhold(newdq
);
1949 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1952 xfs_qm_vop_chown_reserve(
1953 struct xfs_trans
*tp
,
1954 struct xfs_inode
*ip
,
1955 struct xfs_dquot
*udqp
,
1956 struct xfs_dquot
*gdqp
,
1957 struct xfs_dquot
*pdqp
,
1960 struct xfs_mount
*mp
= ip
->i_mount
;
1961 uint delblks
, blkflags
, prjflags
= 0;
1962 struct xfs_dquot
*udq_unres
= NULL
;
1963 struct xfs_dquot
*gdq_unres
= NULL
;
1964 struct xfs_dquot
*pdq_unres
= NULL
;
1965 struct xfs_dquot
*udq_delblks
= NULL
;
1966 struct xfs_dquot
*gdq_delblks
= NULL
;
1967 struct xfs_dquot
*pdq_delblks
= NULL
;
1971 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
|XFS_ILOCK_SHARED
));
1972 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
1974 delblks
= ip
->i_delayed_blks
;
1975 blkflags
= XFS_IS_REALTIME_INODE(ip
) ?
1976 XFS_QMOPT_RES_RTBLKS
: XFS_QMOPT_RES_REGBLKS
;
1978 if (XFS_IS_UQUOTA_ON(mp
) && udqp
&&
1979 ip
->i_d
.di_uid
!= be32_to_cpu(udqp
->q_core
.d_id
)) {
1982 * If there are delayed allocation blocks, then we have to
1983 * unreserve those from the old dquot, and add them to the
1987 ASSERT(ip
->i_udquot
);
1988 udq_unres
= ip
->i_udquot
;
1991 if (XFS_IS_GQUOTA_ON(ip
->i_mount
) && gdqp
&&
1992 ip
->i_d
.di_gid
!= be32_to_cpu(gdqp
->q_core
.d_id
)) {
1995 ASSERT(ip
->i_gdquot
);
1996 gdq_unres
= ip
->i_gdquot
;
2000 if (XFS_IS_PQUOTA_ON(ip
->i_mount
) && pdqp
&&
2001 xfs_get_projid(ip
) != be32_to_cpu(pdqp
->q_core
.d_id
)) {
2002 prjflags
= XFS_QMOPT_ENOSPC
;
2005 ASSERT(ip
->i_pdquot
);
2006 pdq_unres
= ip
->i_pdquot
;
2010 error
= xfs_trans_reserve_quota_bydquots(tp
, ip
->i_mount
,
2011 udq_delblks
, gdq_delblks
, pdq_delblks
,
2012 ip
->i_d
.di_nblocks
, 1,
2013 flags
| blkflags
| prjflags
);
2018 * Do the delayed blks reservations/unreservations now. Since, these
2019 * are done without the help of a transaction, if a reservation fails
2020 * its previous reservations won't be automatically undone by trans
2021 * code. So, we have to do it manually here.
2025 * Do the reservations first. Unreservation can't fail.
2027 ASSERT(udq_delblks
|| gdq_delblks
|| pdq_delblks
);
2028 ASSERT(udq_unres
|| gdq_unres
|| pdq_unres
);
2029 error
= xfs_trans_reserve_quota_bydquots(NULL
, ip
->i_mount
,
2030 udq_delblks
, gdq_delblks
, pdq_delblks
,
2031 (xfs_qcnt_t
)delblks
, 0,
2032 flags
| blkflags
| prjflags
);
2035 xfs_trans_reserve_quota_bydquots(NULL
, ip
->i_mount
,
2036 udq_unres
, gdq_unres
, pdq_unres
,
2037 -((xfs_qcnt_t
)delblks
), 0, blkflags
);
2044 xfs_qm_vop_rename_dqattach(
2045 struct xfs_inode
**i_tab
)
2047 struct xfs_mount
*mp
= i_tab
[0]->i_mount
;
2050 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
2053 for (i
= 0; (i
< 4 && i_tab
[i
]); i
++) {
2054 struct xfs_inode
*ip
= i_tab
[i
];
2058 * Watch out for duplicate entries in the table.
2060 if (i
== 0 || ip
!= i_tab
[i
-1]) {
2061 if (XFS_NOT_DQATTACHED(mp
, ip
)) {
2062 error
= xfs_qm_dqattach(ip
, 0);
2072 xfs_qm_vop_create_dqattach(
2073 struct xfs_trans
*tp
,
2074 struct xfs_inode
*ip
,
2075 struct xfs_dquot
*udqp
,
2076 struct xfs_dquot
*gdqp
,
2077 struct xfs_dquot
*pdqp
)
2079 struct xfs_mount
*mp
= tp
->t_mountp
;
2081 if (!XFS_IS_QUOTA_RUNNING(mp
) || !XFS_IS_QUOTA_ON(mp
))
2084 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
2085 ASSERT(XFS_IS_QUOTA_RUNNING(mp
));
2088 ASSERT(ip
->i_udquot
== NULL
);
2089 ASSERT(XFS_IS_UQUOTA_ON(mp
));
2090 ASSERT(ip
->i_d
.di_uid
== be32_to_cpu(udqp
->q_core
.d_id
));
2092 ip
->i_udquot
= xfs_qm_dqhold(udqp
);
2093 xfs_trans_mod_dquot(tp
, udqp
, XFS_TRANS_DQ_ICOUNT
, 1);
2096 ASSERT(ip
->i_gdquot
== NULL
);
2097 ASSERT(XFS_IS_GQUOTA_ON(mp
));
2098 ASSERT(ip
->i_d
.di_gid
== be32_to_cpu(gdqp
->q_core
.d_id
));
2099 ip
->i_gdquot
= xfs_qm_dqhold(gdqp
);
2100 xfs_trans_mod_dquot(tp
, gdqp
, XFS_TRANS_DQ_ICOUNT
, 1);
2103 ASSERT(ip
->i_pdquot
== NULL
);
2104 ASSERT(XFS_IS_PQUOTA_ON(mp
));
2105 ASSERT(xfs_get_projid(ip
) == be32_to_cpu(pdqp
->q_core
.d_id
));
2107 ip
->i_pdquot
= xfs_qm_dqhold(pdqp
);
2108 xfs_trans_mod_dquot(tp
, pdqp
, XFS_TRANS_DQ_ICOUNT
, 1);