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);