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"
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;
142 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
148 * If this quota has a group hint attached, prepare for releasing it
151 gdqp = dqp->q_gdquot;
154 dqp->q_gdquot = NULL;
157 dqp->dq_flags |= XFS_DQ_FREEING;
162 * If we are turning this type of quotas off, we don't care
163 * about the dirty metadata sitting in this dquot. OTOH, if
164 * we're unmounting, we do care, so we flush it and wait.
166 if (XFS_DQ_IS_DIRTY(dqp)) {
167 struct xfs_buf *bp = NULL;
171 * We don't care about getting disk errors here. We need
172 * to purge this dquot anyway, so we go ahead regardless.
174 error = xfs_qm_dqflush(dqp, &bp);
176 xfs_warn(mp, "%s: dquot %p flush failed",
179 error = xfs_bwrite(bp);
185 ASSERT(atomic_read(&dqp->q_pincount) == 0);
186 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
187 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
192 radix_tree_delete(XFS_DQUOT_TREE(qi, dqp->q_core.d_flags),
193 be32_to_cpu(dqp->q_core.d_id));
197 * We move dquots to the freelist as soon as their reference count
198 * hits zero, so it really should be on the freelist here.
200 mutex_lock(&qi->qi_lru_lock);
201 ASSERT(!list_empty(&dqp->q_lru));
202 list_del_init(&dqp->q_lru);
204 XFS_STATS_DEC(xs_qm_dquot_unused);
205 mutex_unlock(&qi->qi_lru_lock);
207 xfs_qm_dqdestroy(dqp);
215 * Purge the dquot cache.
219 struct xfs_mount *mp,
222 if (flags & XFS_QMOPT_UQUOTA)
223 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
224 if (flags & XFS_QMOPT_GQUOTA)
225 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
226 if (flags & XFS_QMOPT_PQUOTA)
227 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
231 * Just destroy the quotainfo structure.
235 struct xfs_mount *mp)
237 if (mp->m_quotainfo) {
238 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
239 xfs_qm_destroy_quotainfo(mp);
245 * This is called from xfs_mountfs to start quotas and initialize all
246 * necessary data structures like quotainfo. This is also responsible for
247 * running a quotacheck as necessary. We are guaranteed that the superblock
248 * is consistently read in at this point.
250 * If we fail here, the mount will continue with quota turned off. We don't
251 * need to inidicate success or failure at all.
261 * If quotas on realtime volumes is not supported, we disable
262 * quotas immediately.
264 if (mp->m_sb.sb_rextents) {
265 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
270 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
273 * Allocate the quotainfo structure inside the mount struct, and
274 * create quotainode(s), and change/rev superblock if necessary.
276 error = xfs_qm_init_quotainfo(mp);
279 * We must turn off quotas.
281 ASSERT(mp->m_quotainfo == NULL);
286 * If any of the quotas are not consistent, do a quotacheck.
288 if (XFS_QM_NEED_QUOTACHECK(mp)) {
289 error = xfs_qm_quotacheck(mp);
291 /* Quotacheck failed and disabled quotas. */
296 * If one type of quotas is off, then it will lose its
297 * quotachecked status, since we won't be doing accounting for
300 if (!XFS_IS_UQUOTA_ON(mp))
301 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
302 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
303 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
307 * We actually don't have to acquire the m_sb_lock at all.
308 * This can only be called from mount, and that's single threaded. XXX
310 spin_lock(&mp->m_sb_lock);
311 sbf = mp->m_sb.sb_qflags;
312 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
313 spin_unlock(&mp->m_sb_lock);
315 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
316 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
318 * We could only have been turning quotas off.
319 * We aren't in very good shape actually because
320 * the incore structures are convinced that quotas are
321 * off, but the on disk superblock doesn't know that !
323 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
324 xfs_alert(mp, "%s: Superblock update failed!",
330 xfs_warn(mp, "Failed to initialize disk quotas.");
336 * Called from the vfsops layer.
339 xfs_qm_unmount_quotas(
343 * Release the dquots that root inode, et al might be holding,
344 * before we flush quotas and blow away the quotainfo structure.
346 ASSERT(mp->m_rootip);
347 xfs_qm_dqdetach(mp->m_rootip);
349 xfs_qm_dqdetach(mp->m_rbmip);
351 xfs_qm_dqdetach(mp->m_rsumip);
354 * Release the quota inodes.
356 if (mp->m_quotainfo) {
357 if (mp->m_quotainfo->qi_uquotaip) {
358 IRELE(mp->m_quotainfo->qi_uquotaip);
359 mp->m_quotainfo->qi_uquotaip = NULL;
361 if (mp->m_quotainfo->qi_gquotaip) {
362 IRELE(mp->m_quotainfo->qi_gquotaip);
363 mp->m_quotainfo->qi_gquotaip = NULL;
374 xfs_dquot_t *udqhint, /* hint */
375 xfs_dquot_t **IO_idqpp)
380 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
384 * See if we already have it in the inode itself. IO_idqpp is
385 * &i_udquot or &i_gdquot. This made the code look weird, but
386 * made the logic a lot simpler.
390 trace_xfs_dqattach_found(dqp);
395 * udqhint is the i_udquot field in inode, and is non-NULL only
396 * when the type arg is group/project. Its purpose is to save a
397 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
401 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
405 * No need to take dqlock to look at the id.
407 * The ID can't change until it gets reclaimed, and it won't
408 * be reclaimed as long as we have a ref from inode and we
411 dqp = udqhint->q_gdquot;
412 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
413 ASSERT(*IO_idqpp == NULL);
415 *IO_idqpp = xfs_qm_dqhold(dqp);
416 xfs_dqunlock(udqhint);
421 * We can't hold a dquot lock when we call the dqget code.
422 * We'll deadlock in no time, because of (not conforming to)
423 * lock ordering - the inodelock comes before any dquot lock,
424 * and we may drop and reacquire the ilock in xfs_qm_dqget().
426 xfs_dqunlock(udqhint);
430 * Find the dquot from somewhere. This bumps the
431 * reference count of dquot and returns it locked.
432 * This can return ENOENT if dquot didn't exist on
433 * disk and we didn't ask it to allocate;
434 * ESRCH if quotas got turned off suddenly.
436 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
437 doalloc | XFS_QMOPT_DOWARN, &dqp);
441 trace_xfs_dqattach_get(dqp);
444 * dqget may have dropped and re-acquired the ilock, but it guarantees
445 * that the dquot returned is the one that should go in the inode.
454 * Given a udquot and gdquot, attach a ptr to the group dquot in the
455 * udquot as a hint for future lookups.
458 xfs_qm_dqattach_grouphint(
471 udq->q_gdquot = NULL;
475 udq->q_gdquot = xfs_qm_dqhold(gdq);
481 xfs_qm_need_dqattach(
482 struct xfs_inode *ip)
484 struct xfs_mount *mp = ip->i_mount;
486 if (!XFS_IS_QUOTA_RUNNING(mp))
488 if (!XFS_IS_QUOTA_ON(mp))
490 if (!XFS_NOT_DQATTACHED(mp, ip))
492 if (ip->i_ino == mp->m_sb.sb_uquotino ||
493 ip->i_ino == mp->m_sb.sb_gquotino)
499 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
501 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
502 * Inode may get unlocked and relocked in here, and the caller must deal with
506 xfs_qm_dqattach_locked(
510 xfs_mount_t *mp = ip->i_mount;
514 if (!xfs_qm_need_dqattach(ip))
517 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
519 if (XFS_IS_UQUOTA_ON(mp)) {
520 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
521 flags & XFS_QMOPT_DQALLOC,
522 NULL, &ip->i_udquot);
528 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
529 if (XFS_IS_OQUOTA_ON(mp)) {
530 error = XFS_IS_GQUOTA_ON(mp) ?
531 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
532 flags & XFS_QMOPT_DQALLOC,
533 ip->i_udquot, &ip->i_gdquot) :
534 xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
535 flags & XFS_QMOPT_DQALLOC,
536 ip->i_udquot, &ip->i_gdquot);
538 * Don't worry about the udquot that we may have
539 * attached above. It'll get detached, if not already.
547 * Attach this group quota to the user quota as a hint.
548 * This WON'T, in general, result in a thrash.
551 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
552 ASSERT(ip->i_udquot);
553 ASSERT(ip->i_gdquot);
556 * We do not have i_udquot locked at this point, but this check
557 * is OK since we don't depend on the i_gdquot to be accurate
558 * 100% all the time. It is just a hint, and this will
559 * succeed in general.
561 if (ip->i_udquot->q_gdquot != ip->i_gdquot)
562 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
568 if (XFS_IS_UQUOTA_ON(mp))
569 ASSERT(ip->i_udquot);
570 if (XFS_IS_OQUOTA_ON(mp))
571 ASSERT(ip->i_gdquot);
573 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
580 struct xfs_inode *ip,
585 if (!xfs_qm_need_dqattach(ip))
588 xfs_ilock(ip, XFS_ILOCK_EXCL);
589 error = xfs_qm_dqattach_locked(ip, flags);
590 xfs_iunlock(ip, XFS_ILOCK_EXCL);
596 * Release dquots (and their references) if any.
597 * The inode should be locked EXCL except when this's called by
604 if (!(ip->i_udquot || ip->i_gdquot))
607 trace_xfs_dquot_dqdetach(ip);
609 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
610 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
612 xfs_qm_dqrele(ip->i_udquot);
616 xfs_qm_dqrele(ip->i_gdquot);
622 xfs_qm_calc_dquots_per_chunk(
623 struct xfs_mount *mp,
624 unsigned int nbblks) /* basic block units */
626 unsigned int ndquots;
629 ndquots = BBTOB(nbblks);
630 do_div(ndquots, sizeof(xfs_dqblk_t));
636 * This initializes all the quota information that's kept in the
640 xfs_qm_init_quotainfo(
643 xfs_quotainfo_t *qinf;
647 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
649 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
652 * See if quotainodes are setup, and if not, allocate them,
653 * and change the superblock accordingly.
655 if ((error = xfs_qm_init_quotainos(mp))) {
657 mp->m_quotainfo = NULL;
661 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
662 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
663 mutex_init(&qinf->qi_tree_lock);
665 INIT_LIST_HEAD(&qinf->qi_lru_list);
666 qinf->qi_lru_count = 0;
667 mutex_init(&qinf->qi_lru_lock);
669 /* mutex used to serialize quotaoffs */
670 mutex_init(&qinf->qi_quotaofflock);
672 /* Precalc some constants */
673 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
674 qinf->qi_dqperchunk = xfs_qm_calc_dquots_per_chunk(mp,
675 qinf->qi_dqchunklen);
677 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
680 * We try to get the limits from the superuser's limits fields.
681 * This is quite hacky, but it is standard quota practice.
683 * We look at the USR dquot with id == 0 first, but if user quotas
684 * are not enabled we goto the GRP dquot with id == 0.
685 * We don't really care to keep separate default limits for user
686 * and group quotas, at least not at this point.
688 * Since we may not have done a quotacheck by this point, just read
689 * the dquot without attaching it to any hashtables or lists.
691 error = xfs_qm_dqread(mp, 0,
692 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
693 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
695 XFS_QMOPT_DOWARN, &dqp);
697 xfs_disk_dquot_t *ddqp = &dqp->q_core;
700 * The warnings and timers set the grace period given to
701 * a user or group before he or she can not perform any
702 * more writing. If it is zero, a default is used.
704 qinf->qi_btimelimit = ddqp->d_btimer ?
705 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
706 qinf->qi_itimelimit = ddqp->d_itimer ?
707 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
708 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
709 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
710 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
711 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
712 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
713 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
714 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
715 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
716 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
717 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
718 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
719 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
720 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
721 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
723 xfs_qm_dqdestroy(dqp);
725 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
726 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
727 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
728 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
729 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
730 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
733 qinf->qi_shrinker.shrink = xfs_qm_shake;
734 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
735 register_shrinker(&qinf->qi_shrinker);
741 * Gets called when unmounting a filesystem or when all quotas get
743 * This purges the quota inodes, destroys locks and frees itself.
746 xfs_qm_destroy_quotainfo(
751 qi = mp->m_quotainfo;
754 unregister_shrinker(&qi->qi_shrinker);
756 if (qi->qi_uquotaip) {
757 IRELE(qi->qi_uquotaip);
758 qi->qi_uquotaip = NULL; /* paranoia */
760 if (qi->qi_gquotaip) {
761 IRELE(qi->qi_gquotaip);
762 qi->qi_gquotaip = NULL;
764 mutex_destroy(&qi->qi_quotaofflock);
766 mp->m_quotainfo = NULL;
770 * Create an inode and return with a reference already taken, but unlocked
771 * This is how we create quota inodes
784 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
785 if ((error = xfs_trans_reserve(tp,
786 XFS_QM_QINOCREATE_SPACE_RES(mp),
787 XFS_CREATE_LOG_RES(mp), 0,
788 XFS_TRANS_PERM_LOG_RES,
789 XFS_CREATE_LOG_COUNT))) {
790 xfs_trans_cancel(tp, 0);
794 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip, &committed);
796 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
802 * Make the changes in the superblock, and log those too.
803 * sbfields arg may contain fields other than *QUOTINO;
804 * VERSIONNUM for example.
806 spin_lock(&mp->m_sb_lock);
807 if (flags & XFS_QMOPT_SBVERSION) {
808 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
809 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
810 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
811 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
812 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
814 xfs_sb_version_addquota(&mp->m_sb);
815 mp->m_sb.sb_uquotino = NULLFSINO;
816 mp->m_sb.sb_gquotino = NULLFSINO;
818 /* qflags will get updated _after_ quotacheck */
819 mp->m_sb.sb_qflags = 0;
821 if (flags & XFS_QMOPT_UQUOTA)
822 mp->m_sb.sb_uquotino = (*ip)->i_ino;
824 mp->m_sb.sb_gquotino = (*ip)->i_ino;
825 spin_unlock(&mp->m_sb_lock);
826 xfs_mod_sb(tp, sbfields);
828 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
829 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
837 xfs_qm_reset_dqcounts(
843 struct xfs_dqblk *dqb;
846 trace_xfs_reset_dqcounts(bp, _RET_IP_);
849 * Reset all counters and timers. They'll be
850 * started afresh by xfs_qm_quotacheck.
853 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
854 do_div(j, sizeof(xfs_dqblk_t));
855 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
858 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
859 struct xfs_disk_dquot *ddq;
861 ddq = (struct xfs_disk_dquot *)&dqb[j];
864 * Do a sanity check, and if needed, repair the dqblk. Don't
865 * output any warnings because it's perfectly possible to
866 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
868 (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
880 if (xfs_sb_version_hascrc(&mp->m_sb)) {
881 xfs_update_cksum((char *)&dqb[j],
882 sizeof(struct xfs_dqblk),
890 struct xfs_mount *mp,
893 xfs_filblks_t blkcnt,
895 struct list_head *buffer_list)
902 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
903 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
907 * Blkcnt arg can be a very big number, and might even be
908 * larger than the log itself. So, we have to break it up into
909 * manageable-sized transactions.
910 * Note that we don't start a permanent transaction here; we might
911 * not be able to get a log reservation for the whole thing up front,
912 * and we don't really care to either, because we just discard
913 * everything if we were to crash in the middle of this loop.
916 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
917 XFS_FSB_TO_DADDR(mp, bno),
918 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
922 * CRC and validation errors will return a EFSCORRUPTED here. If
923 * this occurs, re-read without CRC validation so that we can
924 * repair the damage via xfs_qm_reset_dqcounts(). This process
925 * will leave a trace in the log indicating corruption has
928 if (error == EFSCORRUPTED) {
929 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
930 XFS_FSB_TO_DADDR(mp, bno),
931 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
939 * A corrupt buffer might not have a verifier attached, so
940 * make sure we have the correct one attached before writeback
943 bp->b_ops = &xfs_dquot_buf_ops;
944 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
945 xfs_buf_delwri_queue(bp, buffer_list);
948 /* goto the next block. */
950 firstid += mp->m_quotainfo->qi_dqperchunk;
957 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
958 * caller supplied function for every chunk of dquots that we find.
962 struct xfs_mount *mp,
963 struct xfs_inode *qip,
965 struct list_head *buffer_list)
967 struct xfs_bmbt_irec *map;
968 int i, nmaps; /* number of map entries */
969 int error; /* return value */
970 xfs_fileoff_t lblkno;
971 xfs_filblks_t maxlblkcnt;
973 xfs_fsblock_t rablkno;
974 xfs_filblks_t rablkcnt;
978 * This looks racy, but we can't keep an inode lock across a
979 * trans_reserve. But, this gets called during quotacheck, and that
980 * happens only at mount time which is single threaded.
982 if (qip->i_d.di_nblocks == 0)
985 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
988 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
990 nmaps = XFS_DQITER_MAP_SIZE;
992 * We aren't changing the inode itself. Just changing
993 * some of its data. No new blocks are added here, and
994 * the inode is never added to the transaction.
996 xfs_ilock(qip, XFS_ILOCK_SHARED);
997 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
999 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1003 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1004 for (i = 0; i < nmaps; i++) {
1005 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1006 ASSERT(map[i].br_blockcount);
1009 lblkno += map[i].br_blockcount;
1011 if (map[i].br_startblock == HOLESTARTBLOCK)
1014 firstid = (xfs_dqid_t) map[i].br_startoff *
1015 mp->m_quotainfo->qi_dqperchunk;
1017 * Do a read-ahead on the next extent.
1019 if ((i+1 < nmaps) &&
1020 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1021 rablkcnt = map[i+1].br_blockcount;
1022 rablkno = map[i+1].br_startblock;
1023 while (rablkcnt--) {
1024 xfs_buf_readahead(mp->m_ddev_targp,
1025 XFS_FSB_TO_DADDR(mp, rablkno),
1026 mp->m_quotainfo->qi_dqchunklen,
1027 &xfs_dquot_buf_ops);
1032 * Iterate thru all the blks in the extent and
1033 * reset the counters of all the dquots inside them.
1035 error = xfs_qm_dqiter_bufs(mp, firstid,
1036 map[i].br_startblock,
1037 map[i].br_blockcount,
1038 flags, buffer_list);
1042 } while (nmaps > 0);
1050 * Called by dqusage_adjust in doing a quotacheck.
1052 * Given the inode, and a dquot id this updates both the incore dqout as well
1053 * as the buffer copy. This is so that once the quotacheck is done, we can
1054 * just log all the buffers, as opposed to logging numerous updates to
1055 * individual dquots.
1058 xfs_qm_quotacheck_dqadjust(
1059 struct xfs_inode *ip,
1065 struct xfs_mount *mp = ip->i_mount;
1066 struct xfs_dquot *dqp;
1069 error = xfs_qm_dqget(mp, ip, id, type,
1070 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1073 * Shouldn't be able to turn off quotas here.
1075 ASSERT(error != ESRCH);
1076 ASSERT(error != ENOENT);
1080 trace_xfs_dqadjust(dqp);
1083 * Adjust the inode count and the block count to reflect this inode's
1086 be64_add_cpu(&dqp->q_core.d_icount, 1);
1087 dqp->q_res_icount++;
1089 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1090 dqp->q_res_bcount += nblks;
1093 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1094 dqp->q_res_rtbcount += rtblks;
1098 * Set default limits, adjust timers (since we changed usages)
1100 * There are no timers for the default values set in the root dquot.
1102 if (dqp->q_core.d_id) {
1103 xfs_qm_adjust_dqlimits(mp, dqp);
1104 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1107 dqp->dq_flags |= XFS_DQ_DIRTY;
1115 xfs_qcnt_t *O_rtblks)
1117 xfs_filblks_t rtblks; /* total rt blks */
1118 xfs_extnum_t idx; /* extent record index */
1119 xfs_ifork_t *ifp; /* inode fork pointer */
1120 xfs_extnum_t nextents; /* number of extent entries */
1123 ASSERT(XFS_IS_REALTIME_INODE(ip));
1124 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1125 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1126 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1130 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1131 for (idx = 0; idx < nextents; idx++)
1132 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1133 *O_rtblks = (xfs_qcnt_t)rtblks;
1138 * callback routine supplied to bulkstat(). Given an inumber, find its
1139 * dquots and update them to account for resources taken by that inode.
1143 xfs_qm_dqusage_adjust(
1144 xfs_mount_t *mp, /* mount point for filesystem */
1145 xfs_ino_t ino, /* inode number to get data for */
1146 void __user *buffer, /* not used */
1147 int ubsize, /* not used */
1148 int *ubused, /* not used */
1149 int *res) /* result code value */
1152 xfs_qcnt_t nblks, rtblks = 0;
1155 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1158 * rootino must have its resources accounted for, not so with the quota
1161 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1162 *res = BULKSTAT_RV_NOTHING;
1163 return XFS_ERROR(EINVAL);
1167 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1168 * interface expects the inode to be exclusively locked because that's
1169 * the case in all other instances. It's OK that we do this because
1170 * quotacheck is done only at mount time.
1172 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1174 *res = BULKSTAT_RV_NOTHING;
1178 ASSERT(ip->i_delayed_blks == 0);
1180 if (XFS_IS_REALTIME_INODE(ip)) {
1182 * Walk thru the extent list and count the realtime blocks.
1184 error = xfs_qm_get_rtblks(ip, &rtblks);
1189 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1192 * Add the (disk blocks and inode) resources occupied by this
1193 * inode to its dquots. We do this adjustment in the incore dquot,
1194 * and also copy the changes to its buffer.
1195 * We don't care about putting these changes in a transaction
1196 * envelope because if we crash in the middle of a 'quotacheck'
1197 * we have to start from the beginning anyway.
1198 * Once we're done, we'll log all the dquot bufs.
1200 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1201 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1203 if (XFS_IS_UQUOTA_ON(mp)) {
1204 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1205 XFS_DQ_USER, nblks, rtblks);
1210 if (XFS_IS_GQUOTA_ON(mp)) {
1211 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1212 XFS_DQ_GROUP, nblks, rtblks);
1217 if (XFS_IS_PQUOTA_ON(mp)) {
1218 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1219 XFS_DQ_PROJ, nblks, rtblks);
1224 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1226 *res = BULKSTAT_RV_DIDONE;
1230 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1232 *res = BULKSTAT_RV_GIVEUP;
1238 struct xfs_dquot *dqp,
1241 struct list_head *buffer_list = data;
1242 struct xfs_buf *bp = NULL;
1246 if (dqp->dq_flags & XFS_DQ_FREEING)
1248 if (!XFS_DQ_IS_DIRTY(dqp))
1252 error = xfs_qm_dqflush(dqp, &bp);
1256 xfs_buf_delwri_queue(bp, buffer_list);
1264 * Walk thru all the filesystem inodes and construct a consistent view
1265 * of the disk quota world. If the quotacheck fails, disable quotas.
1271 int done, count, error, error2;
1274 xfs_inode_t *uip, *gip;
1276 LIST_HEAD (buffer_list);
1283 ASSERT(mp->m_quotainfo->qi_uquotaip || mp->m_quotainfo->qi_gquotaip);
1284 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1286 xfs_notice(mp, "Quotacheck needed: Please wait.");
1289 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1290 * their counters to zero. We need a clean slate.
1291 * We don't log our changes till later.
1293 uip = mp->m_quotainfo->qi_uquotaip;
1295 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1299 flags |= XFS_UQUOTA_CHKD;
1302 gip = mp->m_quotainfo->qi_gquotaip;
1304 error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
1305 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA,
1309 flags |= XFS_OQUOTA_CHKD;
1314 * Iterate thru all the inodes in the file system,
1315 * adjusting the corresponding dquot counters in core.
1317 error = xfs_bulkstat(mp, &lastino, &count,
1318 xfs_qm_dqusage_adjust,
1319 structsz, NULL, &done);
1326 * We've made all the changes that we need to make incore. Flush them
1327 * down to disk buffers if everything was updated successfully.
1329 if (XFS_IS_UQUOTA_ON(mp)) {
1330 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1333 if (XFS_IS_GQUOTA_ON(mp)) {
1334 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1339 if (XFS_IS_PQUOTA_ON(mp)) {
1340 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1346 error2 = xfs_buf_delwri_submit(&buffer_list);
1351 * We can get this error if we couldn't do a dquot allocation inside
1352 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1353 * dirty dquots that might be cached, we just want to get rid of them
1354 * and turn quotaoff. The dquots won't be attached to any of the inodes
1355 * at this point (because we intentionally didn't in dqget_noattach).
1358 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1363 * If one type of quotas is off, then it will lose its
1364 * quotachecked status, since we won't be doing accounting for
1365 * that type anymore.
1367 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1368 mp->m_qflags |= flags;
1371 while (!list_empty(&buffer_list)) {
1372 struct xfs_buf *bp =
1373 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1374 list_del_init(&bp->b_list);
1380 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1383 * We must turn off quotas.
1385 ASSERT(mp->m_quotainfo != NULL);
1386 xfs_qm_destroy_quotainfo(mp);
1387 if (xfs_mount_reset_sbqflags(mp)) {
1389 "Quotacheck: Failed to reset quota flags.");
1392 xfs_notice(mp, "Quotacheck: Done.");
1397 * This is called after the superblock has been read in and we're ready to
1398 * iget the quota inodes.
1401 xfs_qm_init_quotainos(
1404 xfs_inode_t *uip, *gip;
1409 ASSERT(mp->m_quotainfo);
1415 * Get the uquota and gquota inodes
1417 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1418 if (XFS_IS_UQUOTA_ON(mp) &&
1419 mp->m_sb.sb_uquotino != NULLFSINO) {
1420 ASSERT(mp->m_sb.sb_uquotino > 0);
1421 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1423 return XFS_ERROR(error);
1425 if (XFS_IS_OQUOTA_ON(mp) &&
1426 mp->m_sb.sb_gquotino != NULLFSINO) {
1427 ASSERT(mp->m_sb.sb_gquotino > 0);
1428 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1432 return XFS_ERROR(error);
1436 flags |= XFS_QMOPT_SBVERSION;
1437 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1438 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
1442 * Create the two inodes, if they don't exist already. The changes
1443 * made above will get added to a transaction and logged in one of
1444 * the qino_alloc calls below. If the device is readonly,
1445 * temporarily switch to read-write to do this.
1447 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1448 if ((error = xfs_qm_qino_alloc(mp, &uip,
1449 sbflags | XFS_SB_UQUOTINO,
1450 flags | XFS_QMOPT_UQUOTA)))
1451 return XFS_ERROR(error);
1453 flags &= ~XFS_QMOPT_SBVERSION;
1455 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
1456 flags |= (XFS_IS_GQUOTA_ON(mp) ?
1457 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1458 error = xfs_qm_qino_alloc(mp, &gip,
1459 sbflags | XFS_SB_GQUOTINO, flags);
1464 return XFS_ERROR(error);
1468 mp->m_quotainfo->qi_uquotaip = uip;
1469 mp->m_quotainfo->qi_gquotaip = gip;
1476 struct xfs_dquot *dqp)
1478 struct xfs_mount *mp = dqp->q_mount;
1479 struct xfs_quotainfo *qi = mp->m_quotainfo;
1481 mutex_lock(&qi->qi_tree_lock);
1482 radix_tree_delete(XFS_DQUOT_TREE(qi, dqp->q_core.d_flags),
1483 be32_to_cpu(dqp->q_core.d_id));
1486 mutex_unlock(&qi->qi_tree_lock);
1488 xfs_qm_dqdestroy(dqp);
1492 xfs_qm_dqreclaim_one(
1493 struct xfs_dquot *dqp,
1494 struct list_head *buffer_list,
1495 struct list_head *dispose_list)
1497 struct xfs_mount *mp = dqp->q_mount;
1498 struct xfs_quotainfo *qi = mp->m_quotainfo;
1501 if (!xfs_dqlock_nowait(dqp))
1505 * This dquot has acquired a reference in the meantime remove it from
1506 * the freelist and try again.
1511 trace_xfs_dqreclaim_want(dqp);
1512 XFS_STATS_INC(xs_qm_dqwants);
1514 list_del_init(&dqp->q_lru);
1516 XFS_STATS_DEC(xs_qm_dquot_unused);
1521 * Try to grab the flush lock. If this dquot is in the process of
1522 * getting flushed to disk, we don't want to reclaim it.
1524 if (!xfs_dqflock_nowait(dqp))
1525 goto out_unlock_move_tail;
1527 if (XFS_DQ_IS_DIRTY(dqp)) {
1528 struct xfs_buf *bp = NULL;
1530 trace_xfs_dqreclaim_dirty(dqp);
1532 error = xfs_qm_dqflush(dqp, &bp);
1534 xfs_warn(mp, "%s: dquot %p flush failed",
1536 goto out_unlock_move_tail;
1539 xfs_buf_delwri_queue(bp, buffer_list);
1542 * Give the dquot another try on the freelist, as the
1543 * flushing will take some time.
1545 goto out_unlock_move_tail;
1550 * Prevent lookups now that we are past the point of no return.
1552 dqp->dq_flags |= XFS_DQ_FREEING;
1555 ASSERT(dqp->q_nrefs == 0);
1556 list_move_tail(&dqp->q_lru, dispose_list);
1558 XFS_STATS_DEC(xs_qm_dquot_unused);
1560 trace_xfs_dqreclaim_done(dqp);
1561 XFS_STATS_INC(xs_qm_dqreclaims);
1565 * Move the dquot to the tail of the list so that we don't spin on it.
1567 out_unlock_move_tail:
1570 list_move_tail(&dqp->q_lru, &qi->qi_lru_list);
1571 trace_xfs_dqreclaim_busy(dqp);
1572 XFS_STATS_INC(xs_qm_dqreclaim_misses);
1577 struct shrinker *shrink,
1578 struct shrink_control *sc)
1580 struct xfs_quotainfo *qi =
1581 container_of(shrink, struct xfs_quotainfo, qi_shrinker);
1582 int nr_to_scan = sc->nr_to_scan;
1583 LIST_HEAD (buffer_list);
1584 LIST_HEAD (dispose_list);
1585 struct xfs_dquot *dqp;
1588 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
1593 mutex_lock(&qi->qi_lru_lock);
1594 while (!list_empty(&qi->qi_lru_list)) {
1595 if (nr_to_scan-- <= 0)
1597 dqp = list_first_entry(&qi->qi_lru_list, struct xfs_dquot,
1599 xfs_qm_dqreclaim_one(dqp, &buffer_list, &dispose_list);
1601 mutex_unlock(&qi->qi_lru_lock);
1603 error = xfs_buf_delwri_submit(&buffer_list);
1605 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
1607 while (!list_empty(&dispose_list)) {
1608 dqp = list_first_entry(&dispose_list, struct xfs_dquot, q_lru);
1609 list_del_init(&dqp->q_lru);
1610 xfs_qm_dqfree_one(dqp);
1614 return (qi->qi_lru_count / 100) * sysctl_vfs_cache_pressure;
1618 * Start a transaction and write the incore superblock changes to
1619 * disk. flags parameter indicates which fields have changed.
1622 xfs_qm_write_sb_changes(
1629 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1630 error = xfs_trans_reserve(tp, 0, XFS_QM_SBCHANGE_LOG_RES(mp),
1631 0, 0, XFS_DEFAULT_LOG_COUNT);
1633 xfs_trans_cancel(tp, 0);
1637 xfs_mod_sb(tp, flags);
1638 error = xfs_trans_commit(tp, 0);
1644 /* --------------- utility functions for vnodeops ---------------- */
1648 * Given an inode, a uid, gid and prid make sure that we have
1649 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1650 * quotas by creating this file.
1651 * This also attaches dquot(s) to the given inode after locking it,
1652 * and returns the dquots corresponding to the uid and/or gid.
1654 * in : inode (unlocked)
1655 * out : udquot, gdquot with references taken and unlocked
1659 struct xfs_inode *ip,
1664 struct xfs_dquot **O_udqpp,
1665 struct xfs_dquot **O_gdqpp)
1667 struct xfs_mount *mp = ip->i_mount;
1668 struct xfs_dquot *uq, *gq;
1672 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1675 lockflags = XFS_ILOCK_EXCL;
1676 xfs_ilock(ip, lockflags);
1678 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1679 gid = ip->i_d.di_gid;
1682 * Attach the dquot(s) to this inode, doing a dquot allocation
1683 * if necessary. The dquot(s) will not be locked.
1685 if (XFS_NOT_DQATTACHED(mp, ip)) {
1686 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1688 xfs_iunlock(ip, lockflags);
1694 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1695 if (ip->i_d.di_uid != uid) {
1697 * What we need is the dquot that has this uid, and
1698 * if we send the inode to dqget, the uid of the inode
1699 * takes priority over what's sent in the uid argument.
1700 * We must unlock inode here before calling dqget if
1701 * we're not sending the inode, because otherwise
1702 * we'll deadlock by doing trans_reserve while
1705 xfs_iunlock(ip, lockflags);
1706 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
1711 ASSERT(error != ENOENT);
1715 * Get the ilock in the right order.
1718 lockflags = XFS_ILOCK_SHARED;
1719 xfs_ilock(ip, lockflags);
1722 * Take an extra reference, because we'll return
1725 ASSERT(ip->i_udquot);
1726 uq = xfs_qm_dqhold(ip->i_udquot);
1729 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1730 if (ip->i_d.di_gid != gid) {
1731 xfs_iunlock(ip, lockflags);
1732 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
1739 ASSERT(error != ENOENT);
1743 lockflags = XFS_ILOCK_SHARED;
1744 xfs_ilock(ip, lockflags);
1746 ASSERT(ip->i_gdquot);
1747 gq = xfs_qm_dqhold(ip->i_gdquot);
1749 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1750 if (xfs_get_projid(ip) != prid) {
1751 xfs_iunlock(ip, lockflags);
1752 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1759 ASSERT(error != ENOENT);
1763 lockflags = XFS_ILOCK_SHARED;
1764 xfs_ilock(ip, lockflags);
1766 ASSERT(ip->i_gdquot);
1767 gq = xfs_qm_dqhold(ip->i_gdquot);
1771 trace_xfs_dquot_dqalloc(ip);
1773 xfs_iunlock(ip, lockflags);
1786 * Actually transfer ownership, and do dquot modifications.
1787 * These were already reserved.
1793 xfs_dquot_t **IO_olddq,
1796 xfs_dquot_t *prevdq;
1797 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1798 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1801 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1802 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1807 ASSERT(prevdq != newdq);
1809 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1810 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1812 /* the sparkling new dquot */
1813 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1814 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1817 * Take an extra reference, because the inode is going to keep
1818 * this dquot pointer even after the trans_commit.
1820 *IO_olddq = xfs_qm_dqhold(newdq);
1826 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1829 xfs_qm_vop_chown_reserve(
1836 xfs_mount_t *mp = ip->i_mount;
1837 uint delblks, blkflags, prjflags = 0;
1838 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
1842 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1843 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1845 delblks = ip->i_delayed_blks;
1846 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
1847 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1848 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1850 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1851 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
1854 * If there are delayed allocation blocks, then we have to
1855 * unreserve those from the old dquot, and add them to the
1859 ASSERT(ip->i_udquot);
1860 unresudq = ip->i_udquot;
1863 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
1864 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
1865 xfs_get_projid(ip) != be32_to_cpu(gdqp->q_core.d_id))
1866 prjflags = XFS_QMOPT_ENOSPC;
1869 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
1870 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
1873 ASSERT(ip->i_gdquot);
1874 unresgdq = ip->i_gdquot;
1879 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1880 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
1881 flags | blkflags | prjflags)))
1885 * Do the delayed blks reservations/unreservations now. Since, these
1886 * are done without the help of a transaction, if a reservation fails
1887 * its previous reservations won't be automatically undone by trans
1888 * code. So, we have to do it manually here.
1892 * Do the reservations first. Unreservation can't fail.
1894 ASSERT(delblksudq || delblksgdq);
1895 ASSERT(unresudq || unresgdq);
1896 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1897 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
1898 flags | blkflags | prjflags)))
1900 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1901 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
1909 xfs_qm_vop_rename_dqattach(
1910 struct xfs_inode **i_tab)
1912 struct xfs_mount *mp = i_tab[0]->i_mount;
1915 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1918 for (i = 0; (i < 4 && i_tab[i]); i++) {
1919 struct xfs_inode *ip = i_tab[i];
1923 * Watch out for duplicate entries in the table.
1925 if (i == 0 || ip != i_tab[i-1]) {
1926 if (XFS_NOT_DQATTACHED(mp, ip)) {
1927 error = xfs_qm_dqattach(ip, 0);
1937 xfs_qm_vop_create_dqattach(
1938 struct xfs_trans *tp,
1939 struct xfs_inode *ip,
1940 struct xfs_dquot *udqp,
1941 struct xfs_dquot *gdqp)
1943 struct xfs_mount *mp = tp->t_mountp;
1945 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1948 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1949 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1952 ASSERT(ip->i_udquot == NULL);
1953 ASSERT(XFS_IS_UQUOTA_ON(mp));
1954 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
1956 ip->i_udquot = xfs_qm_dqhold(udqp);
1957 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1960 ASSERT(ip->i_gdquot == NULL);
1961 ASSERT(XFS_IS_OQUOTA_ON(mp));
1962 ASSERT((XFS_IS_GQUOTA_ON(mp) ?
1963 ip->i_d.di_gid : xfs_get_projid(ip)) ==
1964 be32_to_cpu(gdqp->q_core.d_id));
1966 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1967 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);