2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
27 #include "xfs_mount.h"
28 #include "xfs_inode.h"
29 #include "xfs_ialloc.h"
30 #include "xfs_itable.h"
31 #include "xfs_quota.h"
32 #include "xfs_error.h"
34 #include "xfs_bmap_btree.h"
35 #include "xfs_trans.h"
36 #include "xfs_trans_space.h"
38 #include "xfs_trace.h"
39 #include "xfs_icache.h"
40 #include "xfs_cksum.h"
41 #include "xfs_dinode.h"
44 * The global quota manager. There is only one of these for the entire
45 * system, _not_ one per file system. XQM keeps track of the overall
46 * quota functionality, including maintaining the freelist and hash
49 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
50 STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
53 STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
55 * We use the batch lookup interface to iterate over the dquots as it
56 * currently is the only interface into the radix tree code that allows
57 * fuzzy lookups instead of exact matches. Holding the lock over multiple
58 * operations is fine as all callers are used either during mount/umount
61 #define XFS_DQ_LOOKUP_BATCH 32
67 int (*execute)(struct xfs_dquot *dqp, void *data),
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], data);
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,
135 struct xfs_mount *mp = dqp->q_mount;
136 struct xfs_quotainfo *qi = mp->m_quotainfo;
139 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
144 dqp->dq_flags |= XFS_DQ_FREEING;
149 * If we are turning this type of quotas off, we don't care
150 * about the dirty metadata sitting in this dquot. OTOH, if
151 * we're unmounting, we do care, so we flush it and wait.
153 if (XFS_DQ_IS_DIRTY(dqp)) {
154 struct xfs_buf *bp = NULL;
158 * We don't care about getting disk errors here. We need
159 * to purge this dquot anyway, so we go ahead regardless.
161 error = xfs_qm_dqflush(dqp, &bp);
163 xfs_warn(mp, "%s: dquot %p flush failed",
166 error = xfs_bwrite(bp);
172 ASSERT(atomic_read(&dqp->q_pincount) == 0);
173 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
174 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
179 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
180 be32_to_cpu(dqp->q_core.d_id));
184 * We move dquots to the freelist as soon as their reference count
185 * hits zero, so it really should be on the freelist here.
187 ASSERT(!list_empty(&dqp->q_lru));
188 list_lru_del(&qi->qi_lru, &dqp->q_lru);
189 XFS_STATS_DEC(xs_qm_dquot_unused);
191 xfs_qm_dqdestroy(dqp);
196 * Release the group or project dquot pointers the user dquots maybe carrying
197 * around as a hint, and proceed to purge the user dquot cache if requested.
200 xfs_qm_dqpurge_hints(
201 struct xfs_dquot *dqp,
204 struct xfs_dquot *gdqp = NULL;
205 struct xfs_dquot *pdqp = NULL;
206 uint flags = *((uint *)data);
209 if (dqp->dq_flags & XFS_DQ_FREEING) {
214 /* If this quota has a hint attached, prepare for releasing it now */
215 gdqp = dqp->q_gdquot;
217 dqp->q_gdquot = NULL;
219 pdqp = dqp->q_pdquot;
221 dqp->q_pdquot = NULL;
230 if (flags & XFS_QMOPT_UQUOTA)
231 return xfs_qm_dqpurge(dqp, NULL);
237 * Purge the dquot cache.
241 struct xfs_mount *mp,
245 * We have to release group/project dquot hint(s) from the user dquot
246 * at first if they are there, otherwise we would run into an infinite
247 * loop while walking through radix tree to purge other type of dquots
248 * since their refcount is not zero if the user dquot refers to them
251 * Call the special xfs_qm_dqpurge_hints() will end up go through the
252 * general xfs_qm_dqpurge() against user dquot cache if requested.
254 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge_hints, &flags);
256 if (flags & XFS_QMOPT_GQUOTA)
257 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
258 if (flags & XFS_QMOPT_PQUOTA)
259 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
263 * Just destroy the quotainfo structure.
267 struct xfs_mount *mp)
269 if (mp->m_quotainfo) {
270 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
271 xfs_qm_destroy_quotainfo(mp);
277 * This is called from xfs_mountfs to start quotas and initialize all
278 * necessary data structures like quotainfo. This is also responsible for
279 * running a quotacheck as necessary. We are guaranteed that the superblock
280 * is consistently read in at this point.
282 * If we fail here, the mount will continue with quota turned off. We don't
283 * need to inidicate success or failure at all.
293 * If quotas on realtime volumes is not supported, we disable
294 * quotas immediately.
296 if (mp->m_sb.sb_rextents) {
297 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
302 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
305 * Allocate the quotainfo structure inside the mount struct, and
306 * create quotainode(s), and change/rev superblock if necessary.
308 error = xfs_qm_init_quotainfo(mp);
311 * We must turn off quotas.
313 ASSERT(mp->m_quotainfo == NULL);
318 * If any of the quotas are not consistent, do a quotacheck.
320 if (XFS_QM_NEED_QUOTACHECK(mp)) {
321 error = xfs_qm_quotacheck(mp);
323 /* Quotacheck failed and disabled quotas. */
328 * If one type of quotas is off, then it will lose its
329 * quotachecked status, since we won't be doing accounting for
332 if (!XFS_IS_UQUOTA_ON(mp))
333 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
334 if (!XFS_IS_GQUOTA_ON(mp))
335 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
336 if (!XFS_IS_PQUOTA_ON(mp))
337 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
341 * We actually don't have to acquire the m_sb_lock at all.
342 * This can only be called from mount, and that's single threaded. XXX
344 spin_lock(&mp->m_sb_lock);
345 sbf = mp->m_sb.sb_qflags;
346 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
347 spin_unlock(&mp->m_sb_lock);
349 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
350 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
352 * We could only have been turning quotas off.
353 * We aren't in very good shape actually because
354 * the incore structures are convinced that quotas are
355 * off, but the on disk superblock doesn't know that !
357 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
358 xfs_alert(mp, "%s: Superblock update failed!",
364 xfs_warn(mp, "Failed to initialize disk quotas.");
370 * Called from the vfsops layer.
373 xfs_qm_unmount_quotas(
377 * Release the dquots that root inode, et al might be holding,
378 * before we flush quotas and blow away the quotainfo structure.
380 ASSERT(mp->m_rootip);
381 xfs_qm_dqdetach(mp->m_rootip);
383 xfs_qm_dqdetach(mp->m_rbmip);
385 xfs_qm_dqdetach(mp->m_rsumip);
388 * Release the quota inodes.
390 if (mp->m_quotainfo) {
391 if (mp->m_quotainfo->qi_uquotaip) {
392 IRELE(mp->m_quotainfo->qi_uquotaip);
393 mp->m_quotainfo->qi_uquotaip = NULL;
395 if (mp->m_quotainfo->qi_gquotaip) {
396 IRELE(mp->m_quotainfo->qi_gquotaip);
397 mp->m_quotainfo->qi_gquotaip = NULL;
399 if (mp->m_quotainfo->qi_pquotaip) {
400 IRELE(mp->m_quotainfo->qi_pquotaip);
401 mp->m_quotainfo->qi_pquotaip = NULL;
412 xfs_dquot_t *udqhint, /* hint */
413 xfs_dquot_t **IO_idqpp)
418 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
422 * See if we already have it in the inode itself. IO_idqpp is
423 * &i_udquot or &i_gdquot. This made the code look weird, but
424 * made the logic a lot simpler.
428 trace_xfs_dqattach_found(dqp);
433 * udqhint is the i_udquot field in inode, and is non-NULL only
434 * when the type arg is group/project. Its purpose is to save a
435 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
439 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
443 * No need to take dqlock to look at the id.
445 * The ID can't change until it gets reclaimed, and it won't
446 * be reclaimed as long as we have a ref from inode and we
449 if (type == XFS_DQ_GROUP)
450 dqp = udqhint->q_gdquot;
452 dqp = udqhint->q_pdquot;
453 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
454 ASSERT(*IO_idqpp == NULL);
456 *IO_idqpp = xfs_qm_dqhold(dqp);
457 xfs_dqunlock(udqhint);
462 * We can't hold a dquot lock when we call the dqget code.
463 * We'll deadlock in no time, because of (not conforming to)
464 * lock ordering - the inodelock comes before any dquot lock,
465 * and we may drop and reacquire the ilock in xfs_qm_dqget().
467 xfs_dqunlock(udqhint);
471 * Find the dquot from somewhere. This bumps the
472 * reference count of dquot and returns it locked.
473 * This can return ENOENT if dquot didn't exist on
474 * disk and we didn't ask it to allocate;
475 * ESRCH if quotas got turned off suddenly.
477 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
478 doalloc | XFS_QMOPT_DOWARN, &dqp);
482 trace_xfs_dqattach_get(dqp);
485 * dqget may have dropped and re-acquired the ilock, but it guarantees
486 * that the dquot returned is the one that should go in the inode.
495 * Given a udquot and group/project type, attach the group/project
496 * dquot pointer to the udquot as a hint for future lookups.
499 xfs_qm_dqattach_hint(
500 struct xfs_inode *ip,
503 struct xfs_dquot **dqhintp;
504 struct xfs_dquot *dqp;
505 struct xfs_dquot *udq = ip->i_udquot;
507 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
511 if (type == XFS_DQ_GROUP) {
513 dqhintp = &udq->q_gdquot;
516 dqhintp = &udq->q_pdquot;
520 struct xfs_dquot *tmp;
530 *dqhintp = xfs_qm_dqhold(dqp);
536 xfs_qm_need_dqattach(
537 struct xfs_inode *ip)
539 struct xfs_mount *mp = ip->i_mount;
541 if (!XFS_IS_QUOTA_RUNNING(mp))
543 if (!XFS_IS_QUOTA_ON(mp))
545 if (!XFS_NOT_DQATTACHED(mp, ip))
547 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
553 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
555 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
556 * Inode may get unlocked and relocked in here, and the caller must deal with
560 xfs_qm_dqattach_locked(
564 xfs_mount_t *mp = ip->i_mount;
568 if (!xfs_qm_need_dqattach(ip))
571 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
573 if (XFS_IS_UQUOTA_ON(mp)) {
574 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
575 flags & XFS_QMOPT_DQALLOC,
576 NULL, &ip->i_udquot);
582 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
583 if (XFS_IS_GQUOTA_ON(mp)) {
584 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
585 flags & XFS_QMOPT_DQALLOC,
586 ip->i_udquot, &ip->i_gdquot);
588 * Don't worry about the udquot that we may have
589 * attached above. It'll get detached, if not already.
596 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
597 if (XFS_IS_PQUOTA_ON(mp)) {
598 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
599 flags & XFS_QMOPT_DQALLOC,
600 ip->i_udquot, &ip->i_pdquot);
602 * Don't worry about the udquot that we may have
603 * attached above. It'll get detached, if not already.
611 * Attach this group/project quota to the user quota as a hint.
612 * This WON'T, in general, result in a thrash.
614 if (nquotas > 1 && ip->i_udquot) {
615 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
616 ASSERT(ip->i_gdquot || !XFS_IS_GQUOTA_ON(mp));
617 ASSERT(ip->i_pdquot || !XFS_IS_PQUOTA_ON(mp));
620 * We do not have i_udquot locked at this point, but this check
621 * is OK since we don't depend on the i_gdquot to be accurate
622 * 100% all the time. It is just a hint, and this will
623 * succeed in general.
625 if (ip->i_udquot->q_gdquot != ip->i_gdquot)
626 xfs_qm_dqattach_hint(ip, XFS_DQ_GROUP);
628 if (ip->i_udquot->q_pdquot != ip->i_pdquot)
629 xfs_qm_dqattach_hint(ip, XFS_DQ_PROJ);
635 if (XFS_IS_UQUOTA_ON(mp))
636 ASSERT(ip->i_udquot);
637 if (XFS_IS_GQUOTA_ON(mp))
638 ASSERT(ip->i_gdquot);
639 if (XFS_IS_PQUOTA_ON(mp))
640 ASSERT(ip->i_pdquot);
642 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
649 struct xfs_inode *ip,
654 if (!xfs_qm_need_dqattach(ip))
657 xfs_ilock(ip, XFS_ILOCK_EXCL);
658 error = xfs_qm_dqattach_locked(ip, flags);
659 xfs_iunlock(ip, XFS_ILOCK_EXCL);
665 * Release dquots (and their references) if any.
666 * The inode should be locked EXCL except when this's called by
673 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
676 trace_xfs_dquot_dqdetach(ip);
678 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
680 xfs_qm_dqrele(ip->i_udquot);
684 xfs_qm_dqrele(ip->i_gdquot);
688 xfs_qm_dqrele(ip->i_pdquot);
693 struct xfs_qm_isolate {
694 struct list_head buffers;
695 struct list_head dispose;
698 static enum lru_status
699 xfs_qm_dquot_isolate(
700 struct list_head *item,
701 spinlock_t *lru_lock,
704 struct xfs_dquot *dqp = container_of(item,
705 struct xfs_dquot, q_lru);
706 struct xfs_qm_isolate *isol = arg;
708 if (!xfs_dqlock_nowait(dqp))
712 * This dquot has acquired a reference in the meantime remove it from
713 * the freelist and try again.
717 XFS_STATS_INC(xs_qm_dqwants);
719 trace_xfs_dqreclaim_want(dqp);
720 list_del_init(&dqp->q_lru);
721 XFS_STATS_DEC(xs_qm_dquot_unused);
726 * If the dquot is dirty, flush it. If it's already being flushed, just
727 * skip it so there is time for the IO to complete before we try to
728 * reclaim it again on the next LRU pass.
730 if (!xfs_dqflock_nowait(dqp)) {
735 if (XFS_DQ_IS_DIRTY(dqp)) {
736 struct xfs_buf *bp = NULL;
739 trace_xfs_dqreclaim_dirty(dqp);
741 /* we have to drop the LRU lock to flush the dquot */
742 spin_unlock(lru_lock);
744 error = xfs_qm_dqflush(dqp, &bp);
746 xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
748 goto out_unlock_dirty;
751 xfs_buf_delwri_queue(bp, &isol->buffers);
753 goto out_unlock_dirty;
758 * Prevent lookups now that we are past the point of no return.
760 dqp->dq_flags |= XFS_DQ_FREEING;
763 ASSERT(dqp->q_nrefs == 0);
764 list_move_tail(&dqp->q_lru, &isol->dispose);
765 XFS_STATS_DEC(xs_qm_dquot_unused);
766 trace_xfs_dqreclaim_done(dqp);
767 XFS_STATS_INC(xs_qm_dqreclaims);
771 trace_xfs_dqreclaim_busy(dqp);
772 XFS_STATS_INC(xs_qm_dqreclaim_misses);
776 trace_xfs_dqreclaim_busy(dqp);
777 XFS_STATS_INC(xs_qm_dqreclaim_misses);
785 struct shrinker *shrink,
786 struct shrink_control *sc)
788 struct xfs_quotainfo *qi = container_of(shrink,
789 struct xfs_quotainfo, qi_shrinker);
790 struct xfs_qm_isolate isol;
793 unsigned long nr_to_scan = sc->nr_to_scan;
795 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
798 INIT_LIST_HEAD(&isol.buffers);
799 INIT_LIST_HEAD(&isol.dispose);
801 freed = list_lru_walk_node(&qi->qi_lru, sc->nid, xfs_qm_dquot_isolate, &isol,
804 error = xfs_buf_delwri_submit(&isol.buffers);
806 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
808 while (!list_empty(&isol.dispose)) {
809 struct xfs_dquot *dqp;
811 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
812 list_del_init(&dqp->q_lru);
813 xfs_qm_dqfree_one(dqp);
821 struct shrinker *shrink,
822 struct shrink_control *sc)
824 struct xfs_quotainfo *qi = container_of(shrink,
825 struct xfs_quotainfo, qi_shrinker);
827 return list_lru_count_node(&qi->qi_lru, sc->nid);
831 * This initializes all the quota information that's kept in the
835 xfs_qm_init_quotainfo(
838 xfs_quotainfo_t *qinf;
842 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
844 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
846 error = -list_lru_init(&qinf->qi_lru);
851 * See if quotainodes are setup, and if not, allocate them,
852 * and change the superblock accordingly.
854 error = xfs_qm_init_quotainos(mp);
858 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
859 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
860 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
861 mutex_init(&qinf->qi_tree_lock);
863 /* mutex used to serialize quotaoffs */
864 mutex_init(&qinf->qi_quotaofflock);
866 /* Precalc some constants */
867 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
868 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(mp,
869 qinf->qi_dqchunklen);
871 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
874 * We try to get the limits from the superuser's limits fields.
875 * This is quite hacky, but it is standard quota practice.
877 * We look at the USR dquot with id == 0 first, but if user quotas
878 * are not enabled we goto the GRP dquot with id == 0.
879 * We don't really care to keep separate default limits for user
880 * and group quotas, at least not at this point.
882 * Since we may not have done a quotacheck by this point, just read
883 * the dquot without attaching it to any hashtables or lists.
885 error = xfs_qm_dqread(mp, 0,
886 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
887 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
889 XFS_QMOPT_DOWARN, &dqp);
891 xfs_disk_dquot_t *ddqp = &dqp->q_core;
894 * The warnings and timers set the grace period given to
895 * a user or group before he or she can not perform any
896 * more writing. If it is zero, a default is used.
898 qinf->qi_btimelimit = ddqp->d_btimer ?
899 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
900 qinf->qi_itimelimit = ddqp->d_itimer ?
901 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
902 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
903 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
904 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
905 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
906 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
907 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
908 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
909 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
910 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
911 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
912 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
913 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
914 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
915 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
917 xfs_qm_dqdestroy(dqp);
919 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
920 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
921 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
922 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
923 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
924 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
927 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
928 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
929 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
930 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
931 register_shrinker(&qinf->qi_shrinker);
935 list_lru_destroy(&qinf->qi_lru);
938 mp->m_quotainfo = NULL;
944 * Gets called when unmounting a filesystem or when all quotas get
946 * This purges the quota inodes, destroys locks and frees itself.
949 xfs_qm_destroy_quotainfo(
954 qi = mp->m_quotainfo;
957 unregister_shrinker(&qi->qi_shrinker);
958 list_lru_destroy(&qi->qi_lru);
960 if (qi->qi_uquotaip) {
961 IRELE(qi->qi_uquotaip);
962 qi->qi_uquotaip = NULL; /* paranoia */
964 if (qi->qi_gquotaip) {
965 IRELE(qi->qi_gquotaip);
966 qi->qi_gquotaip = NULL;
968 if (qi->qi_pquotaip) {
969 IRELE(qi->qi_pquotaip);
970 qi->qi_pquotaip = NULL;
972 mutex_destroy(&qi->qi_quotaofflock);
974 mp->m_quotainfo = NULL;
978 * Create an inode and return with a reference already taken, but unlocked
979 * This is how we create quota inodes
994 * With superblock that doesn't have separate pquotino, we
995 * share an inode between gquota and pquota. If the on-disk
996 * superblock has GQUOTA and the filesystem is now mounted
997 * with PQUOTA, just use sb_gquotino for sb_pquotino and
1000 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
1001 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
1002 xfs_ino_t ino = NULLFSINO;
1004 if ((flags & XFS_QMOPT_PQUOTA) &&
1005 (mp->m_sb.sb_gquotino != NULLFSINO)) {
1006 ino = mp->m_sb.sb_gquotino;
1007 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
1008 } else if ((flags & XFS_QMOPT_GQUOTA) &&
1009 (mp->m_sb.sb_pquotino != NULLFSINO)) {
1010 ino = mp->m_sb.sb_pquotino;
1011 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
1013 if (ino != NULLFSINO) {
1014 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
1017 mp->m_sb.sb_gquotino = NULLFSINO;
1018 mp->m_sb.sb_pquotino = NULLFSINO;
1022 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
1023 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create,
1024 XFS_QM_QINOCREATE_SPACE_RES(mp), 0);
1026 xfs_trans_cancel(tp, 0);
1031 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
1034 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
1041 * Make the changes in the superblock, and log those too.
1042 * sbfields arg may contain fields other than *QUOTINO;
1043 * VERSIONNUM for example.
1045 spin_lock(&mp->m_sb_lock);
1046 if (flags & XFS_QMOPT_SBVERSION) {
1047 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
1048 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1049 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS)) ==
1050 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1051 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1054 xfs_sb_version_addquota(&mp->m_sb);
1055 mp->m_sb.sb_uquotino = NULLFSINO;
1056 mp->m_sb.sb_gquotino = NULLFSINO;
1057 mp->m_sb.sb_pquotino = NULLFSINO;
1059 /* qflags will get updated fully _after_ quotacheck */
1060 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
1062 if (flags & XFS_QMOPT_UQUOTA)
1063 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1064 else if (flags & XFS_QMOPT_GQUOTA)
1065 mp->m_sb.sb_gquotino = (*ip)->i_ino;
1067 mp->m_sb.sb_pquotino = (*ip)->i_ino;
1068 spin_unlock(&mp->m_sb_lock);
1069 xfs_mod_sb(tp, sbfields);
1071 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
1072 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
1080 xfs_qm_reset_dqcounts(
1086 struct xfs_dqblk *dqb;
1089 trace_xfs_reset_dqcounts(bp, _RET_IP_);
1092 * Reset all counters and timers. They'll be
1093 * started afresh by xfs_qm_quotacheck.
1096 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1097 do_div(j, sizeof(xfs_dqblk_t));
1098 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
1101 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
1102 struct xfs_disk_dquot *ddq;
1104 ddq = (struct xfs_disk_dquot *)&dqb[j];
1107 * Do a sanity check, and if needed, repair the dqblk. Don't
1108 * output any warnings because it's perfectly possible to
1109 * find uninitialised dquot blks. See comment in xfs_dqcheck.
1111 xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1115 ddq->d_rtbcount = 0;
1118 ddq->d_rtbtimer = 0;
1121 ddq->d_rtbwarns = 0;
1123 if (xfs_sb_version_hascrc(&mp->m_sb)) {
1124 xfs_update_cksum((char *)&dqb[j],
1125 sizeof(struct xfs_dqblk),
1133 struct xfs_mount *mp,
1136 xfs_filblks_t blkcnt,
1138 struct list_head *buffer_list)
1145 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1146 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
1150 * Blkcnt arg can be a very big number, and might even be
1151 * larger than the log itself. So, we have to break it up into
1152 * manageable-sized transactions.
1153 * Note that we don't start a permanent transaction here; we might
1154 * not be able to get a log reservation for the whole thing up front,
1155 * and we don't really care to either, because we just discard
1156 * everything if we were to crash in the middle of this loop.
1159 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1160 XFS_FSB_TO_DADDR(mp, bno),
1161 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1162 &xfs_dquot_buf_ops);
1165 * CRC and validation errors will return a EFSCORRUPTED here. If
1166 * this occurs, re-read without CRC validation so that we can
1167 * repair the damage via xfs_qm_reset_dqcounts(). This process
1168 * will leave a trace in the log indicating corruption has
1171 if (error == EFSCORRUPTED) {
1172 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1173 XFS_FSB_TO_DADDR(mp, bno),
1174 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1181 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1182 xfs_buf_delwri_queue(bp, buffer_list);
1185 /* goto the next block. */
1187 firstid += mp->m_quotainfo->qi_dqperchunk;
1194 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1195 * caller supplied function for every chunk of dquots that we find.
1199 struct xfs_mount *mp,
1200 struct xfs_inode *qip,
1202 struct list_head *buffer_list)
1204 struct xfs_bmbt_irec *map;
1205 int i, nmaps; /* number of map entries */
1206 int error; /* return value */
1207 xfs_fileoff_t lblkno;
1208 xfs_filblks_t maxlblkcnt;
1210 xfs_fsblock_t rablkno;
1211 xfs_filblks_t rablkcnt;
1215 * This looks racy, but we can't keep an inode lock across a
1216 * trans_reserve. But, this gets called during quotacheck, and that
1217 * happens only at mount time which is single threaded.
1219 if (qip->i_d.di_nblocks == 0)
1222 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1225 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
1229 nmaps = XFS_DQITER_MAP_SIZE;
1231 * We aren't changing the inode itself. Just changing
1232 * some of its data. No new blocks are added here, and
1233 * the inode is never added to the transaction.
1235 lock_mode = xfs_ilock_data_map_shared(qip);
1236 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1238 xfs_iunlock(qip, lock_mode);
1242 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1243 for (i = 0; i < nmaps; i++) {
1244 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1245 ASSERT(map[i].br_blockcount);
1248 lblkno += map[i].br_blockcount;
1250 if (map[i].br_startblock == HOLESTARTBLOCK)
1253 firstid = (xfs_dqid_t) map[i].br_startoff *
1254 mp->m_quotainfo->qi_dqperchunk;
1256 * Do a read-ahead on the next extent.
1258 if ((i+1 < nmaps) &&
1259 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1260 rablkcnt = map[i+1].br_blockcount;
1261 rablkno = map[i+1].br_startblock;
1262 while (rablkcnt--) {
1263 xfs_buf_readahead(mp->m_ddev_targp,
1264 XFS_FSB_TO_DADDR(mp, rablkno),
1265 mp->m_quotainfo->qi_dqchunklen,
1271 * Iterate thru all the blks in the extent and
1272 * reset the counters of all the dquots inside them.
1274 error = xfs_qm_dqiter_bufs(mp, firstid,
1275 map[i].br_startblock,
1276 map[i].br_blockcount,
1277 flags, buffer_list);
1281 } while (nmaps > 0);
1289 * Called by dqusage_adjust in doing a quotacheck.
1291 * Given the inode, and a dquot id this updates both the incore dqout as well
1292 * as the buffer copy. This is so that once the quotacheck is done, we can
1293 * just log all the buffers, as opposed to logging numerous updates to
1294 * individual dquots.
1297 xfs_qm_quotacheck_dqadjust(
1298 struct xfs_inode *ip,
1304 struct xfs_mount *mp = ip->i_mount;
1305 struct xfs_dquot *dqp;
1308 error = xfs_qm_dqget(mp, ip, id, type,
1309 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1312 * Shouldn't be able to turn off quotas here.
1314 ASSERT(error != ESRCH);
1315 ASSERT(error != ENOENT);
1319 trace_xfs_dqadjust(dqp);
1322 * Adjust the inode count and the block count to reflect this inode's
1325 be64_add_cpu(&dqp->q_core.d_icount, 1);
1326 dqp->q_res_icount++;
1328 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1329 dqp->q_res_bcount += nblks;
1332 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1333 dqp->q_res_rtbcount += rtblks;
1337 * Set default limits, adjust timers (since we changed usages)
1339 * There are no timers for the default values set in the root dquot.
1341 if (dqp->q_core.d_id) {
1342 xfs_qm_adjust_dqlimits(mp, dqp);
1343 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1346 dqp->dq_flags |= XFS_DQ_DIRTY;
1354 xfs_qcnt_t *O_rtblks)
1356 xfs_filblks_t rtblks; /* total rt blks */
1357 xfs_extnum_t idx; /* extent record index */
1358 xfs_ifork_t *ifp; /* inode fork pointer */
1359 xfs_extnum_t nextents; /* number of extent entries */
1362 ASSERT(XFS_IS_REALTIME_INODE(ip));
1363 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1364 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1365 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1369 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1370 for (idx = 0; idx < nextents; idx++)
1371 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1372 *O_rtblks = (xfs_qcnt_t)rtblks;
1377 * callback routine supplied to bulkstat(). Given an inumber, find its
1378 * dquots and update them to account for resources taken by that inode.
1382 xfs_qm_dqusage_adjust(
1383 xfs_mount_t *mp, /* mount point for filesystem */
1384 xfs_ino_t ino, /* inode number to get data for */
1385 void __user *buffer, /* not used */
1386 int ubsize, /* not used */
1387 int *ubused, /* not used */
1388 int *res) /* result code value */
1391 xfs_qcnt_t nblks, rtblks = 0;
1394 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1397 * rootino must have its resources accounted for, not so with the quota
1400 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1401 *res = BULKSTAT_RV_NOTHING;
1402 return XFS_ERROR(EINVAL);
1406 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1407 * interface expects the inode to be exclusively locked because that's
1408 * the case in all other instances. It's OK that we do this because
1409 * quotacheck is done only at mount time.
1411 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1413 *res = BULKSTAT_RV_NOTHING;
1417 ASSERT(ip->i_delayed_blks == 0);
1419 if (XFS_IS_REALTIME_INODE(ip)) {
1421 * Walk thru the extent list and count the realtime blocks.
1423 error = xfs_qm_get_rtblks(ip, &rtblks);
1428 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1431 * Add the (disk blocks and inode) resources occupied by this
1432 * inode to its dquots. We do this adjustment in the incore dquot,
1433 * and also copy the changes to its buffer.
1434 * We don't care about putting these changes in a transaction
1435 * envelope because if we crash in the middle of a 'quotacheck'
1436 * we have to start from the beginning anyway.
1437 * Once we're done, we'll log all the dquot bufs.
1439 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1440 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1442 if (XFS_IS_UQUOTA_ON(mp)) {
1443 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1444 XFS_DQ_USER, nblks, rtblks);
1449 if (XFS_IS_GQUOTA_ON(mp)) {
1450 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1451 XFS_DQ_GROUP, nblks, rtblks);
1456 if (XFS_IS_PQUOTA_ON(mp)) {
1457 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1458 XFS_DQ_PROJ, nblks, rtblks);
1463 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1465 *res = BULKSTAT_RV_DIDONE;
1469 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1471 *res = BULKSTAT_RV_GIVEUP;
1477 struct xfs_dquot *dqp,
1480 struct list_head *buffer_list = data;
1481 struct xfs_buf *bp = NULL;
1485 if (dqp->dq_flags & XFS_DQ_FREEING)
1487 if (!XFS_DQ_IS_DIRTY(dqp))
1491 error = xfs_qm_dqflush(dqp, &bp);
1495 xfs_buf_delwri_queue(bp, buffer_list);
1503 * Walk thru all the filesystem inodes and construct a consistent view
1504 * of the disk quota world. If the quotacheck fails, disable quotas.
1510 int done, count, error, error2;
1514 LIST_HEAD (buffer_list);
1515 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1516 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1517 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1524 ASSERT(uip || gip || pip);
1525 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1527 xfs_notice(mp, "Quotacheck needed: Please wait.");
1530 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1531 * their counters to zero. We need a clean slate.
1532 * We don't log our changes till later.
1535 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1539 flags |= XFS_UQUOTA_CHKD;
1543 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1547 flags |= XFS_GQUOTA_CHKD;
1551 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1555 flags |= XFS_PQUOTA_CHKD;
1560 * Iterate thru all the inodes in the file system,
1561 * adjusting the corresponding dquot counters in core.
1563 error = xfs_bulkstat(mp, &lastino, &count,
1564 xfs_qm_dqusage_adjust,
1565 structsz, NULL, &done);
1572 * We've made all the changes that we need to make incore. Flush them
1573 * down to disk buffers if everything was updated successfully.
1575 if (XFS_IS_UQUOTA_ON(mp)) {
1576 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1579 if (XFS_IS_GQUOTA_ON(mp)) {
1580 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1585 if (XFS_IS_PQUOTA_ON(mp)) {
1586 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1592 error2 = xfs_buf_delwri_submit(&buffer_list);
1597 * We can get this error if we couldn't do a dquot allocation inside
1598 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1599 * dirty dquots that might be cached, we just want to get rid of them
1600 * and turn quotaoff. The dquots won't be attached to any of the inodes
1601 * at this point (because we intentionally didn't in dqget_noattach).
1604 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1609 * If one type of quotas is off, then it will lose its
1610 * quotachecked status, since we won't be doing accounting for
1611 * that type anymore.
1613 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1614 mp->m_qflags |= flags;
1617 while (!list_empty(&buffer_list)) {
1618 struct xfs_buf *bp =
1619 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1620 list_del_init(&bp->b_list);
1626 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1629 * We must turn off quotas.
1631 ASSERT(mp->m_quotainfo != NULL);
1632 xfs_qm_destroy_quotainfo(mp);
1633 if (xfs_mount_reset_sbqflags(mp)) {
1635 "Quotacheck: Failed to reset quota flags.");
1638 xfs_notice(mp, "Quotacheck: Done.");
1643 * This is called after the superblock has been read in and we're ready to
1644 * iget the quota inodes.
1647 xfs_qm_init_quotainos(
1650 struct xfs_inode *uip = NULL;
1651 struct xfs_inode *gip = NULL;
1652 struct xfs_inode *pip = NULL;
1654 __int64_t sbflags = 0;
1657 ASSERT(mp->m_quotainfo);
1660 * Get the uquota and gquota inodes
1662 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1663 if (XFS_IS_UQUOTA_ON(mp) &&
1664 mp->m_sb.sb_uquotino != NULLFSINO) {
1665 ASSERT(mp->m_sb.sb_uquotino > 0);
1666 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1669 return XFS_ERROR(error);
1671 if (XFS_IS_GQUOTA_ON(mp) &&
1672 mp->m_sb.sb_gquotino != NULLFSINO) {
1673 ASSERT(mp->m_sb.sb_gquotino > 0);
1674 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1679 if (XFS_IS_PQUOTA_ON(mp) &&
1680 mp->m_sb.sb_pquotino != NULLFSINO) {
1681 ASSERT(mp->m_sb.sb_pquotino > 0);
1682 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1688 flags |= XFS_QMOPT_SBVERSION;
1689 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1690 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1695 * Create the three inodes, if they don't exist already. The changes
1696 * made above will get added to a transaction and logged in one of
1697 * the qino_alloc calls below. If the device is readonly,
1698 * temporarily switch to read-write to do this.
1700 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1701 error = xfs_qm_qino_alloc(mp, &uip,
1702 sbflags | XFS_SB_UQUOTINO,
1703 flags | XFS_QMOPT_UQUOTA);
1707 flags &= ~XFS_QMOPT_SBVERSION;
1709 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1710 error = xfs_qm_qino_alloc(mp, &gip,
1711 sbflags | XFS_SB_GQUOTINO,
1712 flags | XFS_QMOPT_GQUOTA);
1716 flags &= ~XFS_QMOPT_SBVERSION;
1718 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1719 error = xfs_qm_qino_alloc(mp, &pip,
1720 sbflags | XFS_SB_PQUOTINO,
1721 flags | XFS_QMOPT_PQUOTA);
1726 mp->m_quotainfo->qi_uquotaip = uip;
1727 mp->m_quotainfo->qi_gquotaip = gip;
1728 mp->m_quotainfo->qi_pquotaip = pip;
1739 return XFS_ERROR(error);
1744 struct xfs_dquot *dqp)
1746 struct xfs_mount *mp = dqp->q_mount;
1747 struct xfs_quotainfo *qi = mp->m_quotainfo;
1749 mutex_lock(&qi->qi_tree_lock);
1750 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1751 be32_to_cpu(dqp->q_core.d_id));
1754 mutex_unlock(&qi->qi_tree_lock);
1756 xfs_qm_dqdestroy(dqp);
1760 * Start a transaction and write the incore superblock changes to
1761 * disk. flags parameter indicates which fields have changed.
1764 xfs_qm_write_sb_changes(
1771 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1772 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
1774 xfs_trans_cancel(tp, 0);
1778 xfs_mod_sb(tp, flags);
1779 error = xfs_trans_commit(tp, 0);
1785 /* --------------- utility functions for vnodeops ---------------- */
1789 * Given an inode, a uid, gid and prid make sure that we have
1790 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1791 * quotas by creating this file.
1792 * This also attaches dquot(s) to the given inode after locking it,
1793 * and returns the dquots corresponding to the uid and/or gid.
1795 * in : inode (unlocked)
1796 * out : udquot, gdquot with references taken and unlocked
1800 struct xfs_inode *ip,
1805 struct xfs_dquot **O_udqpp,
1806 struct xfs_dquot **O_gdqpp,
1807 struct xfs_dquot **O_pdqpp)
1809 struct xfs_mount *mp = ip->i_mount;
1810 struct xfs_dquot *uq = NULL;
1811 struct xfs_dquot *gq = NULL;
1812 struct xfs_dquot *pq = NULL;
1816 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1819 lockflags = XFS_ILOCK_EXCL;
1820 xfs_ilock(ip, lockflags);
1822 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1823 gid = ip->i_d.di_gid;
1826 * Attach the dquot(s) to this inode, doing a dquot allocation
1827 * if necessary. The dquot(s) will not be locked.
1829 if (XFS_NOT_DQATTACHED(mp, ip)) {
1830 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1832 xfs_iunlock(ip, lockflags);
1837 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1838 if (ip->i_d.di_uid != uid) {
1840 * What we need is the dquot that has this uid, and
1841 * if we send the inode to dqget, the uid of the inode
1842 * takes priority over what's sent in the uid argument.
1843 * We must unlock inode here before calling dqget if
1844 * we're not sending the inode, because otherwise
1845 * we'll deadlock by doing trans_reserve while
1848 xfs_iunlock(ip, lockflags);
1849 error = xfs_qm_dqget(mp, NULL, uid,
1855 ASSERT(error != ENOENT);
1859 * Get the ilock in the right order.
1862 lockflags = XFS_ILOCK_SHARED;
1863 xfs_ilock(ip, lockflags);
1866 * Take an extra reference, because we'll return
1869 ASSERT(ip->i_udquot);
1870 uq = xfs_qm_dqhold(ip->i_udquot);
1873 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1874 if (ip->i_d.di_gid != gid) {
1875 xfs_iunlock(ip, lockflags);
1876 error = xfs_qm_dqget(mp, NULL, gid,
1882 ASSERT(error != ENOENT);
1886 lockflags = XFS_ILOCK_SHARED;
1887 xfs_ilock(ip, lockflags);
1889 ASSERT(ip->i_gdquot);
1890 gq = xfs_qm_dqhold(ip->i_gdquot);
1893 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1894 if (xfs_get_projid(ip) != prid) {
1895 xfs_iunlock(ip, lockflags);
1896 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1902 ASSERT(error != ENOENT);
1906 lockflags = XFS_ILOCK_SHARED;
1907 xfs_ilock(ip, lockflags);
1909 ASSERT(ip->i_pdquot);
1910 pq = xfs_qm_dqhold(ip->i_pdquot);
1914 trace_xfs_dquot_dqalloc(ip);
1916 xfs_iunlock(ip, lockflags);
1940 * Actually transfer ownership, and do dquot modifications.
1941 * These were already reserved.
1947 xfs_dquot_t **IO_olddq,
1950 xfs_dquot_t *prevdq;
1951 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1952 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1955 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1956 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1961 ASSERT(prevdq != newdq);
1963 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1964 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1966 /* the sparkling new dquot */
1967 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1968 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1971 * Take an extra reference, because the inode is going to keep
1972 * this dquot pointer even after the trans_commit.
1974 *IO_olddq = xfs_qm_dqhold(newdq);
1980 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1983 xfs_qm_vop_chown_reserve(
1984 struct xfs_trans *tp,
1985 struct xfs_inode *ip,
1986 struct xfs_dquot *udqp,
1987 struct xfs_dquot *gdqp,
1988 struct xfs_dquot *pdqp,
1991 struct xfs_mount *mp = ip->i_mount;
1992 uint delblks, blkflags, prjflags = 0;
1993 struct xfs_dquot *udq_unres = NULL;
1994 struct xfs_dquot *gdq_unres = NULL;
1995 struct xfs_dquot *pdq_unres = NULL;
1996 struct xfs_dquot *udq_delblks = NULL;
1997 struct xfs_dquot *gdq_delblks = NULL;
1998 struct xfs_dquot *pdq_delblks = NULL;
2002 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
2003 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2005 delblks = ip->i_delayed_blks;
2006 blkflags = XFS_IS_REALTIME_INODE(ip) ?
2007 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
2009 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
2010 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
2013 * If there are delayed allocation blocks, then we have to
2014 * unreserve those from the old dquot, and add them to the
2018 ASSERT(ip->i_udquot);
2019 udq_unres = ip->i_udquot;
2022 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
2023 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
2026 ASSERT(ip->i_gdquot);
2027 gdq_unres = ip->i_gdquot;
2031 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
2032 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
2033 prjflags = XFS_QMOPT_ENOSPC;
2036 ASSERT(ip->i_pdquot);
2037 pdq_unres = ip->i_pdquot;
2041 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2042 udq_delblks, gdq_delblks, pdq_delblks,
2043 ip->i_d.di_nblocks, 1,
2044 flags | blkflags | prjflags);
2049 * Do the delayed blks reservations/unreservations now. Since, these
2050 * are done without the help of a transaction, if a reservation fails
2051 * its previous reservations won't be automatically undone by trans
2052 * code. So, we have to do it manually here.
2056 * Do the reservations first. Unreservation can't fail.
2058 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
2059 ASSERT(udq_unres || gdq_unres || pdq_unres);
2060 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2061 udq_delblks, gdq_delblks, pdq_delblks,
2062 (xfs_qcnt_t)delblks, 0,
2063 flags | blkflags | prjflags);
2066 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2067 udq_unres, gdq_unres, pdq_unres,
2068 -((xfs_qcnt_t)delblks), 0, blkflags);
2075 xfs_qm_vop_rename_dqattach(
2076 struct xfs_inode **i_tab)
2078 struct xfs_mount *mp = i_tab[0]->i_mount;
2081 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2084 for (i = 0; (i < 4 && i_tab[i]); i++) {
2085 struct xfs_inode *ip = i_tab[i];
2089 * Watch out for duplicate entries in the table.
2091 if (i == 0 || ip != i_tab[i-1]) {
2092 if (XFS_NOT_DQATTACHED(mp, ip)) {
2093 error = xfs_qm_dqattach(ip, 0);
2103 xfs_qm_vop_create_dqattach(
2104 struct xfs_trans *tp,
2105 struct xfs_inode *ip,
2106 struct xfs_dquot *udqp,
2107 struct xfs_dquot *gdqp,
2108 struct xfs_dquot *pdqp)
2110 struct xfs_mount *mp = tp->t_mountp;
2112 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2115 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2116 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2118 if (udqp && XFS_IS_UQUOTA_ON(mp)) {
2119 ASSERT(ip->i_udquot == NULL);
2120 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
2122 ip->i_udquot = xfs_qm_dqhold(udqp);
2123 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2125 if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
2126 ASSERT(ip->i_gdquot == NULL);
2127 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
2128 ip->i_gdquot = xfs_qm_dqhold(gdqp);
2129 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2131 if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
2132 ASSERT(ip->i_pdquot == NULL);
2133 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
2135 ip->i_pdquot = xfs_qm_dqhold(pdqp);
2136 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);