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
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"
41 #include "xfs_utils.h"
43 #include "xfs_trace.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))
70 struct xfs_quotainfo *qi = mp->m_quotainfo;
71 struct radix_tree_root *tree = XFS_DQUOT_TREE(qi, type);
83 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
87 mutex_lock(&qi->qi_tree_lock);
88 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
89 next_index, XFS_DQ_LOOKUP_BATCH);
91 mutex_unlock(&qi->qi_tree_lock);
95 for (i = 0; i < nr_found; i++) {
96 struct xfs_dquot *dqp = batch[i];
98 next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
100 error = execute(batch[i]);
101 if (error == EAGAIN) {
105 if (error && last_error != EFSCORRUPTED)
109 mutex_unlock(&qi->qi_tree_lock);
111 /* bail out if the filesystem is corrupted. */
112 if (last_error == EFSCORRUPTED) {
128 * Purge a dquot from all tracking data structures and free it.
132 struct xfs_dquot *dqp)
134 struct xfs_mount *mp = dqp->q_mount;
135 struct xfs_quotainfo *qi = mp->m_quotainfo;
136 struct xfs_dquot *gdqp = NULL;
139 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
145 * If this quota has a group hint attached, prepare for releasing it
148 gdqp = dqp->q_gdquot;
151 dqp->q_gdquot = NULL;
154 dqp->dq_flags |= XFS_DQ_FREEING;
157 * If we're turning off quotas, we have to make sure that, for
158 * example, we don't delete quota disk blocks while dquots are
159 * in the process of getting written to those disk blocks.
160 * This dquot might well be on AIL, and we can't leave it there
161 * if we're turning off quotas. Basically, we need this flush
162 * lock, and are willing to block on it.
164 if (!xfs_dqflock_nowait(dqp)) {
166 * Block on the flush lock after nudging dquot buffer,
169 xfs_dqflock_pushbuf_wait(dqp);
173 * If we are turning this type of quotas off, we don't care
174 * about the dirty metadata sitting in this dquot. OTOH, if
175 * we're unmounting, we do care, so we flush it and wait.
177 if (XFS_DQ_IS_DIRTY(dqp)) {
181 * We don't care about getting disk errors here. We need
182 * to purge this dquot anyway, so we go ahead regardless.
184 error = xfs_qm_dqflush(dqp, SYNC_WAIT);
186 xfs_warn(mp, "%s: dquot %p flush failed",
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);
221 * Purge the dquot cache.
225 struct xfs_mount *mp,
228 if (flags & XFS_QMOPT_UQUOTA)
229 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge);
230 if (flags & XFS_QMOPT_GQUOTA)
231 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge);
232 if (flags & XFS_QMOPT_PQUOTA)
233 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge);
237 * Just destroy the quotainfo structure.
241 struct xfs_mount *mp)
243 if (mp->m_quotainfo) {
244 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
245 xfs_qm_destroy_quotainfo(mp);
251 * This is called from xfs_mountfs to start quotas and initialize all
252 * necessary data structures like quotainfo. This is also responsible for
253 * running a quotacheck as necessary. We are guaranteed that the superblock
254 * is consistently read in at this point.
256 * If we fail here, the mount will continue with quota turned off. We don't
257 * need to inidicate success or failure at all.
267 * If quotas on realtime volumes is not supported, we disable
268 * quotas immediately.
270 if (mp->m_sb.sb_rextents) {
271 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
276 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
279 * Allocate the quotainfo structure inside the mount struct, and
280 * create quotainode(s), and change/rev superblock if necessary.
282 error = xfs_qm_init_quotainfo(mp);
285 * We must turn off quotas.
287 ASSERT(mp->m_quotainfo == NULL);
292 * If any of the quotas are not consistent, do a quotacheck.
294 if (XFS_QM_NEED_QUOTACHECK(mp)) {
295 error = xfs_qm_quotacheck(mp);
297 /* Quotacheck failed and disabled quotas. */
302 * If one type of quotas is off, then it will lose its
303 * quotachecked status, since we won't be doing accounting for
306 if (!XFS_IS_UQUOTA_ON(mp))
307 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
308 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
309 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
313 * We actually don't have to acquire the m_sb_lock at all.
314 * This can only be called from mount, and that's single threaded. XXX
316 spin_lock(&mp->m_sb_lock);
317 sbf = mp->m_sb.sb_qflags;
318 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
319 spin_unlock(&mp->m_sb_lock);
321 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
322 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
324 * We could only have been turning quotas off.
325 * We aren't in very good shape actually because
326 * the incore structures are convinced that quotas are
327 * off, but the on disk superblock doesn't know that !
329 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
330 xfs_alert(mp, "%s: Superblock update failed!",
336 xfs_warn(mp, "Failed to initialize disk quotas.");
342 * Called from the vfsops layer.
345 xfs_qm_unmount_quotas(
349 * Release the dquots that root inode, et al might be holding,
350 * before we flush quotas and blow away the quotainfo structure.
352 ASSERT(mp->m_rootip);
353 xfs_qm_dqdetach(mp->m_rootip);
355 xfs_qm_dqdetach(mp->m_rbmip);
357 xfs_qm_dqdetach(mp->m_rsumip);
360 * Release the quota inodes.
362 if (mp->m_quotainfo) {
363 if (mp->m_quotainfo->qi_uquotaip) {
364 IRELE(mp->m_quotainfo->qi_uquotaip);
365 mp->m_quotainfo->qi_uquotaip = NULL;
367 if (mp->m_quotainfo->qi_gquotaip) {
368 IRELE(mp->m_quotainfo->qi_gquotaip);
369 mp->m_quotainfo->qi_gquotaip = NULL;
380 xfs_dquot_t *udqhint, /* hint */
381 xfs_dquot_t **IO_idqpp)
386 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
390 * See if we already have it in the inode itself. IO_idqpp is
391 * &i_udquot or &i_gdquot. This made the code look weird, but
392 * made the logic a lot simpler.
396 trace_xfs_dqattach_found(dqp);
401 * udqhint is the i_udquot field in inode, and is non-NULL only
402 * when the type arg is group/project. Its purpose is to save a
403 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
407 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
411 * No need to take dqlock to look at the id.
413 * The ID can't change until it gets reclaimed, and it won't
414 * be reclaimed as long as we have a ref from inode and we
417 dqp = udqhint->q_gdquot;
418 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
419 ASSERT(*IO_idqpp == NULL);
421 *IO_idqpp = xfs_qm_dqhold(dqp);
422 xfs_dqunlock(udqhint);
427 * We can't hold a dquot lock when we call the dqget code.
428 * We'll deadlock in no time, because of (not conforming to)
429 * lock ordering - the inodelock comes before any dquot lock,
430 * and we may drop and reacquire the ilock in xfs_qm_dqget().
432 xfs_dqunlock(udqhint);
436 * Find the dquot from somewhere. This bumps the
437 * reference count of dquot and returns it locked.
438 * This can return ENOENT if dquot didn't exist on
439 * disk and we didn't ask it to allocate;
440 * ESRCH if quotas got turned off suddenly.
442 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
443 doalloc | XFS_QMOPT_DOWARN, &dqp);
447 trace_xfs_dqattach_get(dqp);
450 * dqget may have dropped and re-acquired the ilock, but it guarantees
451 * that the dquot returned is the one that should go in the inode.
460 * Given a udquot and gdquot, attach a ptr to the group dquot in the
461 * udquot as a hint for future lookups.
464 xfs_qm_dqattach_grouphint(
477 udq->q_gdquot = NULL;
481 udq->q_gdquot = xfs_qm_dqhold(gdq);
487 xfs_qm_need_dqattach(
488 struct xfs_inode *ip)
490 struct xfs_mount *mp = ip->i_mount;
492 if (!XFS_IS_QUOTA_RUNNING(mp))
494 if (!XFS_IS_QUOTA_ON(mp))
496 if (!XFS_NOT_DQATTACHED(mp, ip))
498 if (ip->i_ino == mp->m_sb.sb_uquotino ||
499 ip->i_ino == mp->m_sb.sb_gquotino)
505 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
507 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
508 * Inode may get unlocked and relocked in here, and the caller must deal with
512 xfs_qm_dqattach_locked(
516 xfs_mount_t *mp = ip->i_mount;
520 if (!xfs_qm_need_dqattach(ip))
523 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
525 if (XFS_IS_UQUOTA_ON(mp)) {
526 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
527 flags & XFS_QMOPT_DQALLOC,
528 NULL, &ip->i_udquot);
534 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
535 if (XFS_IS_OQUOTA_ON(mp)) {
536 error = XFS_IS_GQUOTA_ON(mp) ?
537 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
538 flags & XFS_QMOPT_DQALLOC,
539 ip->i_udquot, &ip->i_gdquot) :
540 xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
541 flags & XFS_QMOPT_DQALLOC,
542 ip->i_udquot, &ip->i_gdquot);
544 * Don't worry about the udquot that we may have
545 * attached above. It'll get detached, if not already.
553 * Attach this group quota to the user quota as a hint.
554 * This WON'T, in general, result in a thrash.
557 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
558 ASSERT(ip->i_udquot);
559 ASSERT(ip->i_gdquot);
562 * We do not have i_udquot locked at this point, but this check
563 * is OK since we don't depend on the i_gdquot to be accurate
564 * 100% all the time. It is just a hint, and this will
565 * succeed in general.
567 if (ip->i_udquot->q_gdquot != ip->i_gdquot)
568 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
574 if (XFS_IS_UQUOTA_ON(mp))
575 ASSERT(ip->i_udquot);
576 if (XFS_IS_OQUOTA_ON(mp))
577 ASSERT(ip->i_gdquot);
579 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
586 struct xfs_inode *ip,
591 if (!xfs_qm_need_dqattach(ip))
594 xfs_ilock(ip, XFS_ILOCK_EXCL);
595 error = xfs_qm_dqattach_locked(ip, flags);
596 xfs_iunlock(ip, XFS_ILOCK_EXCL);
602 * Release dquots (and their references) if any.
603 * The inode should be locked EXCL except when this's called by
610 if (!(ip->i_udquot || ip->i_gdquot))
613 trace_xfs_dquot_dqdetach(ip);
615 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
616 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
618 xfs_qm_dqrele(ip->i_udquot);
622 xfs_qm_dqrele(ip->i_gdquot);
628 * This initializes all the quota information that's kept in the
632 xfs_qm_init_quotainfo(
635 xfs_quotainfo_t *qinf;
639 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
641 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
644 * See if quotainodes are setup, and if not, allocate them,
645 * and change the superblock accordingly.
647 if ((error = xfs_qm_init_quotainos(mp))) {
649 mp->m_quotainfo = NULL;
653 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
654 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
655 mutex_init(&qinf->qi_tree_lock);
657 INIT_LIST_HEAD(&qinf->qi_lru_list);
658 qinf->qi_lru_count = 0;
659 mutex_init(&qinf->qi_lru_lock);
661 /* mutex used to serialize quotaoffs */
662 mutex_init(&qinf->qi_quotaofflock);
664 /* Precalc some constants */
665 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
666 ASSERT(qinf->qi_dqchunklen);
667 qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
668 do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
670 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
673 * We try to get the limits from the superuser's limits fields.
674 * This is quite hacky, but it is standard quota practice.
676 * We look at the USR dquot with id == 0 first, but if user quotas
677 * are not enabled we goto the GRP dquot with id == 0.
678 * We don't really care to keep separate default limits for user
679 * and group quotas, at least not at this point.
681 * Since we may not have done a quotacheck by this point, just read
682 * the dquot without attaching it to any hashtables or lists.
684 error = xfs_qm_dqread(mp, 0,
685 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
686 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
688 XFS_QMOPT_DOWARN, &dqp);
690 xfs_disk_dquot_t *ddqp = &dqp->q_core;
693 * The warnings and timers set the grace period given to
694 * a user or group before he or she can not perform any
695 * more writing. If it is zero, a default is used.
697 qinf->qi_btimelimit = ddqp->d_btimer ?
698 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
699 qinf->qi_itimelimit = ddqp->d_itimer ?
700 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
701 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
702 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
703 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
704 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
705 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
706 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
707 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
708 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
709 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
710 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
711 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
712 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
713 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
714 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
716 xfs_qm_dqdestroy(dqp);
718 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
719 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
720 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
721 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
722 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
723 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
726 qinf->qi_shrinker.shrink = xfs_qm_shake;
727 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
728 register_shrinker(&qinf->qi_shrinker);
734 * Gets called when unmounting a filesystem or when all quotas get
736 * This purges the quota inodes, destroys locks and frees itself.
739 xfs_qm_destroy_quotainfo(
744 qi = mp->m_quotainfo;
747 unregister_shrinker(&qi->qi_shrinker);
749 if (qi->qi_uquotaip) {
750 IRELE(qi->qi_uquotaip);
751 qi->qi_uquotaip = NULL; /* paranoia */
753 if (qi->qi_gquotaip) {
754 IRELE(qi->qi_gquotaip);
755 qi->qi_gquotaip = NULL;
757 mutex_destroy(&qi->qi_quotaofflock);
759 mp->m_quotainfo = NULL;
763 * Create an inode and return with a reference already taken, but unlocked
764 * This is how we create quota inodes
777 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
778 if ((error = xfs_trans_reserve(tp,
779 XFS_QM_QINOCREATE_SPACE_RES(mp),
780 XFS_CREATE_LOG_RES(mp), 0,
781 XFS_TRANS_PERM_LOG_RES,
782 XFS_CREATE_LOG_COUNT))) {
783 xfs_trans_cancel(tp, 0);
787 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip, &committed);
789 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
795 * Make the changes in the superblock, and log those too.
796 * sbfields arg may contain fields other than *QUOTINO;
797 * VERSIONNUM for example.
799 spin_lock(&mp->m_sb_lock);
800 if (flags & XFS_QMOPT_SBVERSION) {
801 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
802 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
803 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
804 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
805 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
807 xfs_sb_version_addquota(&mp->m_sb);
808 mp->m_sb.sb_uquotino = NULLFSINO;
809 mp->m_sb.sb_gquotino = NULLFSINO;
811 /* qflags will get updated _after_ quotacheck */
812 mp->m_sb.sb_qflags = 0;
814 if (flags & XFS_QMOPT_UQUOTA)
815 mp->m_sb.sb_uquotino = (*ip)->i_ino;
817 mp->m_sb.sb_gquotino = (*ip)->i_ino;
818 spin_unlock(&mp->m_sb_lock);
819 xfs_mod_sb(tp, sbfields);
821 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
822 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
830 xfs_qm_reset_dqcounts(
836 xfs_disk_dquot_t *ddq;
839 trace_xfs_reset_dqcounts(bp, _RET_IP_);
842 * Reset all counters and timers. They'll be
843 * started afresh by xfs_qm_quotacheck.
846 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
847 do_div(j, sizeof(xfs_dqblk_t));
848 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
851 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
853 * Do a sanity check, and if needed, repair the dqblk. Don't
854 * output any warnings because it's perfectly possible to
855 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
857 (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
868 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
877 xfs_filblks_t blkcnt,
885 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
886 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
890 * Blkcnt arg can be a very big number, and might even be
891 * larger than the log itself. So, we have to break it up into
892 * manageable-sized transactions.
893 * Note that we don't start a permanent transaction here; we might
894 * not be able to get a log reservation for the whole thing up front,
895 * and we don't really care to either, because we just discard
896 * everything if we were to crash in the middle of this loop.
899 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
900 XFS_FSB_TO_DADDR(mp, bno),
901 mp->m_quotainfo->qi_dqchunklen, 0, &bp);
905 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
906 xfs_buf_delwri_queue(bp);
909 * goto the next block.
912 firstid += mp->m_quotainfo->qi_dqperchunk;
918 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
919 * caller supplied function for every chunk of dquots that we find.
927 xfs_bmbt_irec_t *map;
928 int i, nmaps; /* number of map entries */
929 int error; /* return value */
930 xfs_fileoff_t lblkno;
931 xfs_filblks_t maxlblkcnt;
933 xfs_fsblock_t rablkno;
934 xfs_filblks_t rablkcnt;
938 * This looks racy, but we can't keep an inode lock across a
939 * trans_reserve. But, this gets called during quotacheck, and that
940 * happens only at mount time which is single threaded.
942 if (qip->i_d.di_nblocks == 0)
945 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
948 maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
950 nmaps = XFS_DQITER_MAP_SIZE;
952 * We aren't changing the inode itself. Just changing
953 * some of its data. No new blocks are added here, and
954 * the inode is never added to the transaction.
956 xfs_ilock(qip, XFS_ILOCK_SHARED);
957 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
959 xfs_iunlock(qip, XFS_ILOCK_SHARED);
963 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
964 for (i = 0; i < nmaps; i++) {
965 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
966 ASSERT(map[i].br_blockcount);
969 lblkno += map[i].br_blockcount;
971 if (map[i].br_startblock == HOLESTARTBLOCK)
974 firstid = (xfs_dqid_t) map[i].br_startoff *
975 mp->m_quotainfo->qi_dqperchunk;
977 * Do a read-ahead on the next extent.
980 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
981 rablkcnt = map[i+1].br_blockcount;
982 rablkno = map[i+1].br_startblock;
984 xfs_buf_readahead(mp->m_ddev_targp,
985 XFS_FSB_TO_DADDR(mp, rablkno),
986 mp->m_quotainfo->qi_dqchunklen);
991 * Iterate thru all the blks in the extent and
992 * reset the counters of all the dquots inside them.
994 if ((error = xfs_qm_dqiter_bufs(mp,
996 map[i].br_startblock,
997 map[i].br_blockcount,
1005 } while (nmaps > 0);
1013 * Called by dqusage_adjust in doing a quotacheck.
1015 * Given the inode, and a dquot id this updates both the incore dqout as well
1016 * as the buffer copy. This is so that once the quotacheck is done, we can
1017 * just log all the buffers, as opposed to logging numerous updates to
1018 * individual dquots.
1021 xfs_qm_quotacheck_dqadjust(
1022 struct xfs_inode *ip,
1028 struct xfs_mount *mp = ip->i_mount;
1029 struct xfs_dquot *dqp;
1032 error = xfs_qm_dqget(mp, ip, id, type,
1033 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1036 * Shouldn't be able to turn off quotas here.
1038 ASSERT(error != ESRCH);
1039 ASSERT(error != ENOENT);
1043 trace_xfs_dqadjust(dqp);
1046 * Adjust the inode count and the block count to reflect this inode's
1049 be64_add_cpu(&dqp->q_core.d_icount, 1);
1050 dqp->q_res_icount++;
1052 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1053 dqp->q_res_bcount += nblks;
1056 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1057 dqp->q_res_rtbcount += rtblks;
1061 * Set default limits, adjust timers (since we changed usages)
1063 * There are no timers for the default values set in the root dquot.
1065 if (dqp->q_core.d_id) {
1066 xfs_qm_adjust_dqlimits(mp, &dqp->q_core);
1067 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1070 dqp->dq_flags |= XFS_DQ_DIRTY;
1078 xfs_qcnt_t *O_rtblks)
1080 xfs_filblks_t rtblks; /* total rt blks */
1081 xfs_extnum_t idx; /* extent record index */
1082 xfs_ifork_t *ifp; /* inode fork pointer */
1083 xfs_extnum_t nextents; /* number of extent entries */
1086 ASSERT(XFS_IS_REALTIME_INODE(ip));
1087 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1088 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1089 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1093 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1094 for (idx = 0; idx < nextents; idx++)
1095 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1096 *O_rtblks = (xfs_qcnt_t)rtblks;
1101 * callback routine supplied to bulkstat(). Given an inumber, find its
1102 * dquots and update them to account for resources taken by that inode.
1106 xfs_qm_dqusage_adjust(
1107 xfs_mount_t *mp, /* mount point for filesystem */
1108 xfs_ino_t ino, /* inode number to get data for */
1109 void __user *buffer, /* not used */
1110 int ubsize, /* not used */
1111 int *ubused, /* not used */
1112 int *res) /* result code value */
1115 xfs_qcnt_t nblks, rtblks = 0;
1118 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1121 * rootino must have its resources accounted for, not so with the quota
1124 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1125 *res = BULKSTAT_RV_NOTHING;
1126 return XFS_ERROR(EINVAL);
1130 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1131 * interface expects the inode to be exclusively locked because that's
1132 * the case in all other instances. It's OK that we do this because
1133 * quotacheck is done only at mount time.
1135 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1137 *res = BULKSTAT_RV_NOTHING;
1141 ASSERT(ip->i_delayed_blks == 0);
1143 if (XFS_IS_REALTIME_INODE(ip)) {
1145 * Walk thru the extent list and count the realtime blocks.
1147 error = xfs_qm_get_rtblks(ip, &rtblks);
1152 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1155 * Add the (disk blocks and inode) resources occupied by this
1156 * inode to its dquots. We do this adjustment in the incore dquot,
1157 * and also copy the changes to its buffer.
1158 * We don't care about putting these changes in a transaction
1159 * envelope because if we crash in the middle of a 'quotacheck'
1160 * we have to start from the beginning anyway.
1161 * Once we're done, we'll log all the dquot bufs.
1163 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1164 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1166 if (XFS_IS_UQUOTA_ON(mp)) {
1167 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1168 XFS_DQ_USER, nblks, rtblks);
1173 if (XFS_IS_GQUOTA_ON(mp)) {
1174 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1175 XFS_DQ_GROUP, nblks, rtblks);
1180 if (XFS_IS_PQUOTA_ON(mp)) {
1181 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1182 XFS_DQ_PROJ, nblks, rtblks);
1187 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1189 *res = BULKSTAT_RV_DIDONE;
1193 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1195 *res = BULKSTAT_RV_GIVEUP;
1201 struct xfs_dquot *dqp)
1206 if (dqp->dq_flags & XFS_DQ_FREEING)
1208 if (!XFS_DQ_IS_DIRTY(dqp))
1211 if (!xfs_dqflock_nowait(dqp))
1212 xfs_dqflock_pushbuf_wait(dqp);
1214 error = xfs_qm_dqflush(dqp, 0);
1222 * Walk thru all the filesystem inodes and construct a consistent view
1223 * of the disk quota world. If the quotacheck fails, disable quotas.
1229 int done, count, error, error2;
1232 xfs_inode_t *uip, *gip;
1240 ASSERT(mp->m_quotainfo->qi_uquotaip || mp->m_quotainfo->qi_gquotaip);
1241 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1243 xfs_notice(mp, "Quotacheck needed: Please wait.");
1246 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1247 * their counters to zero. We need a clean slate.
1248 * We don't log our changes till later.
1250 uip = mp->m_quotainfo->qi_uquotaip;
1252 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA);
1255 flags |= XFS_UQUOTA_CHKD;
1258 gip = mp->m_quotainfo->qi_gquotaip;
1260 error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
1261 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);
1286 if (XFS_IS_GQUOTA_ON(mp)) {
1287 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one);
1291 if (XFS_IS_PQUOTA_ON(mp)) {
1292 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one);
1298 * We can get this error if we couldn't do a dquot allocation inside
1299 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1300 * dirty dquots that might be cached, we just want to get rid of them
1301 * and turn quotaoff. The dquots won't be attached to any of the inodes
1302 * at this point (because we intentionally didn't in dqget_noattach).
1305 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1310 * We didn't log anything, because if we crashed, we'll have to
1311 * start the quotacheck from scratch anyway. However, we must make
1312 * sure that our dquot changes are secure before we put the
1313 * quotacheck'd stamp on the superblock. So, here we do a synchronous
1316 xfs_flush_buftarg(mp->m_ddev_targp, 1);
1319 * If one type of quotas is off, then it will lose its
1320 * quotachecked status, since we won't be doing accounting for
1321 * that type anymore.
1323 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1324 mp->m_qflags |= flags;
1329 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1332 * We must turn off quotas.
1334 ASSERT(mp->m_quotainfo != NULL);
1335 xfs_qm_destroy_quotainfo(mp);
1336 if (xfs_mount_reset_sbqflags(mp)) {
1338 "Quotacheck: Failed to reset quota flags.");
1341 xfs_notice(mp, "Quotacheck: Done.");
1346 * This is called after the superblock has been read in and we're ready to
1347 * iget the quota inodes.
1350 xfs_qm_init_quotainos(
1353 xfs_inode_t *uip, *gip;
1358 ASSERT(mp->m_quotainfo);
1364 * Get the uquota and gquota inodes
1366 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1367 if (XFS_IS_UQUOTA_ON(mp) &&
1368 mp->m_sb.sb_uquotino != NULLFSINO) {
1369 ASSERT(mp->m_sb.sb_uquotino > 0);
1370 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1372 return XFS_ERROR(error);
1374 if (XFS_IS_OQUOTA_ON(mp) &&
1375 mp->m_sb.sb_gquotino != NULLFSINO) {
1376 ASSERT(mp->m_sb.sb_gquotino > 0);
1377 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1381 return XFS_ERROR(error);
1385 flags |= XFS_QMOPT_SBVERSION;
1386 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1387 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
1391 * Create the two inodes, if they don't exist already. The changes
1392 * made above will get added to a transaction and logged in one of
1393 * the qino_alloc calls below. If the device is readonly,
1394 * temporarily switch to read-write to do this.
1396 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1397 if ((error = xfs_qm_qino_alloc(mp, &uip,
1398 sbflags | XFS_SB_UQUOTINO,
1399 flags | XFS_QMOPT_UQUOTA)))
1400 return XFS_ERROR(error);
1402 flags &= ~XFS_QMOPT_SBVERSION;
1404 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
1405 flags |= (XFS_IS_GQUOTA_ON(mp) ?
1406 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1407 error = xfs_qm_qino_alloc(mp, &gip,
1408 sbflags | XFS_SB_GQUOTINO, flags);
1413 return XFS_ERROR(error);
1417 mp->m_quotainfo->qi_uquotaip = uip;
1418 mp->m_quotainfo->qi_gquotaip = gip;
1425 struct xfs_dquot *dqp)
1427 struct xfs_mount *mp = dqp->q_mount;
1428 struct xfs_quotainfo *qi = mp->m_quotainfo;
1430 mutex_lock(&qi->qi_tree_lock);
1431 radix_tree_delete(XFS_DQUOT_TREE(qi, dqp->q_core.d_flags),
1432 be32_to_cpu(dqp->q_core.d_id));
1435 mutex_unlock(&qi->qi_tree_lock);
1437 xfs_qm_dqdestroy(dqp);
1441 xfs_qm_dqreclaim_one(
1442 struct xfs_dquot *dqp,
1443 struct list_head *dispose_list)
1445 struct xfs_mount *mp = dqp->q_mount;
1446 struct xfs_quotainfo *qi = mp->m_quotainfo;
1449 if (!xfs_dqlock_nowait(dqp))
1453 * This dquot has acquired a reference in the meantime remove it from
1454 * the freelist and try again.
1459 trace_xfs_dqreclaim_want(dqp);
1460 XFS_STATS_INC(xs_qm_dqwants);
1462 list_del_init(&dqp->q_lru);
1464 XFS_STATS_DEC(xs_qm_dquot_unused);
1469 * Try to grab the flush lock. If this dquot is in the process of
1470 * getting flushed to disk, we don't want to reclaim it.
1472 if (!xfs_dqflock_nowait(dqp))
1476 * We have the flush lock so we know that this is not in the
1477 * process of being flushed. So, if this is dirty, flush it
1478 * DELWRI so that we don't get a freelist infested with
1481 if (XFS_DQ_IS_DIRTY(dqp)) {
1482 trace_xfs_dqreclaim_dirty(dqp);
1485 * We flush it delayed write, so don't bother releasing the
1488 error = xfs_qm_dqflush(dqp, 0);
1490 xfs_warn(mp, "%s: dquot %p flush failed",
1495 * Give the dquot another try on the freelist, as the
1496 * flushing will take some time.
1503 * Prevent lookups now that we are past the point of no return.
1505 dqp->dq_flags |= XFS_DQ_FREEING;
1508 ASSERT(dqp->q_nrefs == 0);
1509 list_move_tail(&dqp->q_lru, dispose_list);
1511 XFS_STATS_DEC(xs_qm_dquot_unused);
1513 trace_xfs_dqreclaim_done(dqp);
1514 XFS_STATS_INC(xs_qm_dqreclaims);
1521 * Move the dquot to the tail of the list so that we don't spin on it.
1523 list_move_tail(&dqp->q_lru, &qi->qi_lru_list);
1525 trace_xfs_dqreclaim_busy(dqp);
1526 XFS_STATS_INC(xs_qm_dqreclaim_misses);
1531 struct shrinker *shrink,
1532 struct shrink_control *sc)
1534 struct xfs_quotainfo *qi =
1535 container_of(shrink, struct xfs_quotainfo, qi_shrinker);
1536 int nr_to_scan = sc->nr_to_scan;
1537 LIST_HEAD (dispose_list);
1538 struct xfs_dquot *dqp;
1540 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
1545 mutex_lock(&qi->qi_lru_lock);
1546 while (!list_empty(&qi->qi_lru_list)) {
1547 if (nr_to_scan-- <= 0)
1549 dqp = list_first_entry(&qi->qi_lru_list, struct xfs_dquot,
1551 xfs_qm_dqreclaim_one(dqp, &dispose_list);
1553 mutex_unlock(&qi->qi_lru_lock);
1555 while (!list_empty(&dispose_list)) {
1556 dqp = list_first_entry(&dispose_list, struct xfs_dquot, q_lru);
1557 list_del_init(&dqp->q_lru);
1558 xfs_qm_dqfree_one(dqp);
1561 return (qi->qi_lru_count / 100) * sysctl_vfs_cache_pressure;
1565 * Start a transaction and write the incore superblock changes to
1566 * disk. flags parameter indicates which fields have changed.
1569 xfs_qm_write_sb_changes(
1576 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1577 if ((error = xfs_trans_reserve(tp, 0,
1578 mp->m_sb.sb_sectsize + 128, 0,
1580 XFS_DEFAULT_LOG_COUNT))) {
1581 xfs_trans_cancel(tp, 0);
1585 xfs_mod_sb(tp, flags);
1586 error = xfs_trans_commit(tp, 0);
1592 /* --------------- utility functions for vnodeops ---------------- */
1596 * Given an inode, a uid, gid and prid make sure that we have
1597 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1598 * quotas by creating this file.
1599 * This also attaches dquot(s) to the given inode after locking it,
1600 * and returns the dquots corresponding to the uid and/or gid.
1602 * in : inode (unlocked)
1603 * out : udquot, gdquot with references taken and unlocked
1607 struct xfs_inode *ip,
1612 struct xfs_dquot **O_udqpp,
1613 struct xfs_dquot **O_gdqpp)
1615 struct xfs_mount *mp = ip->i_mount;
1616 struct xfs_dquot *uq, *gq;
1620 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1623 lockflags = XFS_ILOCK_EXCL;
1624 xfs_ilock(ip, lockflags);
1626 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1627 gid = ip->i_d.di_gid;
1630 * Attach the dquot(s) to this inode, doing a dquot allocation
1631 * if necessary. The dquot(s) will not be locked.
1633 if (XFS_NOT_DQATTACHED(mp, ip)) {
1634 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1636 xfs_iunlock(ip, lockflags);
1642 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1643 if (ip->i_d.di_uid != uid) {
1645 * What we need is the dquot that has this uid, and
1646 * if we send the inode to dqget, the uid of the inode
1647 * takes priority over what's sent in the uid argument.
1648 * We must unlock inode here before calling dqget if
1649 * we're not sending the inode, because otherwise
1650 * we'll deadlock by doing trans_reserve while
1653 xfs_iunlock(ip, lockflags);
1654 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
1659 ASSERT(error != ENOENT);
1663 * Get the ilock in the right order.
1666 lockflags = XFS_ILOCK_SHARED;
1667 xfs_ilock(ip, lockflags);
1670 * Take an extra reference, because we'll return
1673 ASSERT(ip->i_udquot);
1674 uq = xfs_qm_dqhold(ip->i_udquot);
1677 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1678 if (ip->i_d.di_gid != gid) {
1679 xfs_iunlock(ip, lockflags);
1680 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
1687 ASSERT(error != ENOENT);
1691 lockflags = XFS_ILOCK_SHARED;
1692 xfs_ilock(ip, lockflags);
1694 ASSERT(ip->i_gdquot);
1695 gq = xfs_qm_dqhold(ip->i_gdquot);
1697 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1698 if (xfs_get_projid(ip) != prid) {
1699 xfs_iunlock(ip, lockflags);
1700 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1707 ASSERT(error != ENOENT);
1711 lockflags = XFS_ILOCK_SHARED;
1712 xfs_ilock(ip, lockflags);
1714 ASSERT(ip->i_gdquot);
1715 gq = xfs_qm_dqhold(ip->i_gdquot);
1719 trace_xfs_dquot_dqalloc(ip);
1721 xfs_iunlock(ip, lockflags);
1734 * Actually transfer ownership, and do dquot modifications.
1735 * These were already reserved.
1741 xfs_dquot_t **IO_olddq,
1744 xfs_dquot_t *prevdq;
1745 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1746 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1749 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1750 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1755 ASSERT(prevdq != newdq);
1757 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1758 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1760 /* the sparkling new dquot */
1761 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1762 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1765 * Take an extra reference, because the inode is going to keep
1766 * this dquot pointer even after the trans_commit.
1768 *IO_olddq = xfs_qm_dqhold(newdq);
1774 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1777 xfs_qm_vop_chown_reserve(
1784 xfs_mount_t *mp = ip->i_mount;
1785 uint delblks, blkflags, prjflags = 0;
1786 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
1790 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1791 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1793 delblks = ip->i_delayed_blks;
1794 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
1795 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1796 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1798 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1799 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
1802 * If there are delayed allocation blocks, then we have to
1803 * unreserve those from the old dquot, and add them to the
1807 ASSERT(ip->i_udquot);
1808 unresudq = ip->i_udquot;
1811 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
1812 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
1813 xfs_get_projid(ip) != be32_to_cpu(gdqp->q_core.d_id))
1814 prjflags = XFS_QMOPT_ENOSPC;
1817 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
1818 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
1821 ASSERT(ip->i_gdquot);
1822 unresgdq = ip->i_gdquot;
1827 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1828 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
1829 flags | blkflags | prjflags)))
1833 * Do the delayed blks reservations/unreservations now. Since, these
1834 * are done without the help of a transaction, if a reservation fails
1835 * its previous reservations won't be automatically undone by trans
1836 * code. So, we have to do it manually here.
1840 * Do the reservations first. Unreservation can't fail.
1842 ASSERT(delblksudq || delblksgdq);
1843 ASSERT(unresudq || unresgdq);
1844 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1845 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
1846 flags | blkflags | prjflags)))
1848 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1849 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
1857 xfs_qm_vop_rename_dqattach(
1858 struct xfs_inode **i_tab)
1860 struct xfs_mount *mp = i_tab[0]->i_mount;
1863 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1866 for (i = 0; (i < 4 && i_tab[i]); i++) {
1867 struct xfs_inode *ip = i_tab[i];
1871 * Watch out for duplicate entries in the table.
1873 if (i == 0 || ip != i_tab[i-1]) {
1874 if (XFS_NOT_DQATTACHED(mp, ip)) {
1875 error = xfs_qm_dqattach(ip, 0);
1885 xfs_qm_vop_create_dqattach(
1886 struct xfs_trans *tp,
1887 struct xfs_inode *ip,
1888 struct xfs_dquot *udqp,
1889 struct xfs_dquot *gdqp)
1891 struct xfs_mount *mp = tp->t_mountp;
1893 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1896 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1897 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1900 ASSERT(ip->i_udquot == NULL);
1901 ASSERT(XFS_IS_UQUOTA_ON(mp));
1902 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
1904 ip->i_udquot = xfs_qm_dqhold(udqp);
1905 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1908 ASSERT(ip->i_gdquot == NULL);
1909 ASSERT(XFS_IS_OQUOTA_ON(mp));
1910 ASSERT((XFS_IS_GQUOTA_ON(mp) ?
1911 ip->i_d.di_gid : xfs_get_projid(ip)) ==
1912 be32_to_cpu(gdqp->q_core.d_id));
1914 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1915 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);