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;
137 struct xfs_dquot *gdqp = NULL;
138 struct xfs_dquot *pdqp = NULL;
141 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
147 * If this quota has a hint attached, prepare for releasing it now.
149 gdqp = dqp->q_gdquot;
152 dqp->q_gdquot = NULL;
155 pdqp = dqp->q_pdquot;
158 dqp->q_pdquot = NULL;
161 dqp->dq_flags |= XFS_DQ_FREEING;
166 * If we are turning this type of quotas off, we don't care
167 * about the dirty metadata sitting in this dquot. OTOH, if
168 * we're unmounting, we do care, so we flush it and wait.
170 if (XFS_DQ_IS_DIRTY(dqp)) {
171 struct xfs_buf *bp = NULL;
175 * We don't care about getting disk errors here. We need
176 * to purge this dquot anyway, so we go ahead regardless.
178 error = xfs_qm_dqflush(dqp, &bp);
180 xfs_warn(mp, "%s: dquot %p flush failed",
183 error = xfs_bwrite(bp);
189 ASSERT(atomic_read(&dqp->q_pincount) == 0);
190 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
191 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
196 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
197 be32_to_cpu(dqp->q_core.d_id));
201 * We move dquots to the freelist as soon as their reference count
202 * hits zero, so it really should be on the freelist here.
204 ASSERT(!list_empty(&dqp->q_lru));
205 list_lru_del(&qi->qi_lru, &dqp->q_lru);
206 XFS_STATS_DEC(xs_qm_dquot_unused);
208 xfs_qm_dqdestroy(dqp);
218 * Purge the dquot cache.
222 struct xfs_mount *mp,
225 if (flags & XFS_QMOPT_UQUOTA)
226 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
227 if (flags & XFS_QMOPT_GQUOTA)
228 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
229 if (flags & XFS_QMOPT_PQUOTA)
230 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
234 * Just destroy the quotainfo structure.
238 struct xfs_mount *mp)
240 if (mp->m_quotainfo) {
241 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
242 xfs_qm_destroy_quotainfo(mp);
248 * This is called from xfs_mountfs to start quotas and initialize all
249 * necessary data structures like quotainfo. This is also responsible for
250 * running a quotacheck as necessary. We are guaranteed that the superblock
251 * is consistently read in at this point.
253 * If we fail here, the mount will continue with quota turned off. We don't
254 * need to inidicate success or failure at all.
264 * If quotas on realtime volumes is not supported, we disable
265 * quotas immediately.
267 if (mp->m_sb.sb_rextents) {
268 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
273 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
276 * Allocate the quotainfo structure inside the mount struct, and
277 * create quotainode(s), and change/rev superblock if necessary.
279 error = xfs_qm_init_quotainfo(mp);
282 * We must turn off quotas.
284 ASSERT(mp->m_quotainfo == NULL);
289 * If any of the quotas are not consistent, do a quotacheck.
291 if (XFS_QM_NEED_QUOTACHECK(mp)) {
292 error = xfs_qm_quotacheck(mp);
294 /* Quotacheck failed and disabled quotas. */
299 * If one type of quotas is off, then it will lose its
300 * quotachecked status, since we won't be doing accounting for
303 if (!XFS_IS_UQUOTA_ON(mp))
304 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
305 if (!XFS_IS_GQUOTA_ON(mp))
306 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
307 if (!XFS_IS_PQUOTA_ON(mp))
308 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
312 * We actually don't have to acquire the m_sb_lock at all.
313 * This can only be called from mount, and that's single threaded. XXX
315 spin_lock(&mp->m_sb_lock);
316 sbf = mp->m_sb.sb_qflags;
317 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
318 spin_unlock(&mp->m_sb_lock);
320 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
321 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
323 * We could only have been turning quotas off.
324 * We aren't in very good shape actually because
325 * the incore structures are convinced that quotas are
326 * off, but the on disk superblock doesn't know that !
328 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
329 xfs_alert(mp, "%s: Superblock update failed!",
335 xfs_warn(mp, "Failed to initialize disk quotas.");
341 * Called from the vfsops layer.
344 xfs_qm_unmount_quotas(
348 * Release the dquots that root inode, et al might be holding,
349 * before we flush quotas and blow away the quotainfo structure.
351 ASSERT(mp->m_rootip);
352 xfs_qm_dqdetach(mp->m_rootip);
354 xfs_qm_dqdetach(mp->m_rbmip);
356 xfs_qm_dqdetach(mp->m_rsumip);
359 * Release the quota inodes.
361 if (mp->m_quotainfo) {
362 if (mp->m_quotainfo->qi_uquotaip) {
363 IRELE(mp->m_quotainfo->qi_uquotaip);
364 mp->m_quotainfo->qi_uquotaip = NULL;
366 if (mp->m_quotainfo->qi_gquotaip) {
367 IRELE(mp->m_quotainfo->qi_gquotaip);
368 mp->m_quotainfo->qi_gquotaip = NULL;
370 if (mp->m_quotainfo->qi_pquotaip) {
371 IRELE(mp->m_quotainfo->qi_pquotaip);
372 mp->m_quotainfo->qi_pquotaip = NULL;
383 xfs_dquot_t *udqhint, /* hint */
384 xfs_dquot_t **IO_idqpp)
389 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
393 * See if we already have it in the inode itself. IO_idqpp is
394 * &i_udquot or &i_gdquot. This made the code look weird, but
395 * made the logic a lot simpler.
399 trace_xfs_dqattach_found(dqp);
404 * udqhint is the i_udquot field in inode, and is non-NULL only
405 * when the type arg is group/project. Its purpose is to save a
406 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
410 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
414 * No need to take dqlock to look at the id.
416 * The ID can't change until it gets reclaimed, and it won't
417 * be reclaimed as long as we have a ref from inode and we
420 if (type == XFS_DQ_GROUP)
421 dqp = udqhint->q_gdquot;
423 dqp = udqhint->q_pdquot;
424 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
425 ASSERT(*IO_idqpp == NULL);
427 *IO_idqpp = xfs_qm_dqhold(dqp);
428 xfs_dqunlock(udqhint);
433 * We can't hold a dquot lock when we call the dqget code.
434 * We'll deadlock in no time, because of (not conforming to)
435 * lock ordering - the inodelock comes before any dquot lock,
436 * and we may drop and reacquire the ilock in xfs_qm_dqget().
438 xfs_dqunlock(udqhint);
442 * Find the dquot from somewhere. This bumps the
443 * reference count of dquot and returns it locked.
444 * This can return ENOENT if dquot didn't exist on
445 * disk and we didn't ask it to allocate;
446 * ESRCH if quotas got turned off suddenly.
448 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
449 doalloc | XFS_QMOPT_DOWARN, &dqp);
453 trace_xfs_dqattach_get(dqp);
456 * dqget may have dropped and re-acquired the ilock, but it guarantees
457 * that the dquot returned is the one that should go in the inode.
466 * Given a udquot and group/project type, attach the group/project
467 * dquot pointer to the udquot as a hint for future lookups.
470 xfs_qm_dqattach_hint(
471 struct xfs_inode *ip,
474 struct xfs_dquot **dqhintp;
475 struct xfs_dquot *dqp;
476 struct xfs_dquot *udq = ip->i_udquot;
478 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
482 if (type == XFS_DQ_GROUP) {
484 dqhintp = &udq->q_gdquot;
487 dqhintp = &udq->q_pdquot;
491 struct xfs_dquot *tmp;
501 *dqhintp = xfs_qm_dqhold(dqp);
507 xfs_qm_need_dqattach(
508 struct xfs_inode *ip)
510 struct xfs_mount *mp = ip->i_mount;
512 if (!XFS_IS_QUOTA_RUNNING(mp))
514 if (!XFS_IS_QUOTA_ON(mp))
516 if (!XFS_NOT_DQATTACHED(mp, ip))
518 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
524 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
526 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
527 * Inode may get unlocked and relocked in here, and the caller must deal with
531 xfs_qm_dqattach_locked(
535 xfs_mount_t *mp = ip->i_mount;
539 if (!xfs_qm_need_dqattach(ip))
542 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
544 if (XFS_IS_UQUOTA_ON(mp)) {
545 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
546 flags & XFS_QMOPT_DQALLOC,
547 NULL, &ip->i_udquot);
553 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
554 if (XFS_IS_GQUOTA_ON(mp)) {
555 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
556 flags & XFS_QMOPT_DQALLOC,
557 ip->i_udquot, &ip->i_gdquot);
559 * Don't worry about the udquot that we may have
560 * attached above. It'll get detached, if not already.
567 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
568 if (XFS_IS_PQUOTA_ON(mp)) {
569 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
570 flags & XFS_QMOPT_DQALLOC,
571 ip->i_udquot, &ip->i_pdquot);
573 * Don't worry about the udquot that we may have
574 * attached above. It'll get detached, if not already.
582 * Attach this group/project quota to the user quota as a hint.
583 * This WON'T, in general, result in a thrash.
585 if (nquotas > 1 && ip->i_udquot) {
586 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
587 ASSERT(ip->i_gdquot || !XFS_IS_GQUOTA_ON(mp));
588 ASSERT(ip->i_pdquot || !XFS_IS_PQUOTA_ON(mp));
591 * We do not have i_udquot locked at this point, but this check
592 * is OK since we don't depend on the i_gdquot to be accurate
593 * 100% all the time. It is just a hint, and this will
594 * succeed in general.
596 if (ip->i_udquot->q_gdquot != ip->i_gdquot)
597 xfs_qm_dqattach_hint(ip, XFS_DQ_GROUP);
599 if (ip->i_udquot->q_pdquot != ip->i_pdquot)
600 xfs_qm_dqattach_hint(ip, XFS_DQ_PROJ);
606 if (XFS_IS_UQUOTA_ON(mp))
607 ASSERT(ip->i_udquot);
608 if (XFS_IS_GQUOTA_ON(mp))
609 ASSERT(ip->i_gdquot);
610 if (XFS_IS_PQUOTA_ON(mp))
611 ASSERT(ip->i_pdquot);
613 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
620 struct xfs_inode *ip,
625 if (!xfs_qm_need_dqattach(ip))
628 xfs_ilock(ip, XFS_ILOCK_EXCL);
629 error = xfs_qm_dqattach_locked(ip, flags);
630 xfs_iunlock(ip, XFS_ILOCK_EXCL);
636 * Release dquots (and their references) if any.
637 * The inode should be locked EXCL except when this's called by
644 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
647 trace_xfs_dquot_dqdetach(ip);
649 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
651 xfs_qm_dqrele(ip->i_udquot);
655 xfs_qm_dqrele(ip->i_gdquot);
659 xfs_qm_dqrele(ip->i_pdquot);
664 struct xfs_qm_isolate {
665 struct list_head buffers;
666 struct list_head dispose;
669 static enum lru_status
670 xfs_qm_dquot_isolate(
671 struct list_head *item,
672 spinlock_t *lru_lock,
675 struct xfs_dquot *dqp = container_of(item,
676 struct xfs_dquot, q_lru);
677 struct xfs_qm_isolate *isol = arg;
679 if (!xfs_dqlock_nowait(dqp))
683 * This dquot has acquired a reference in the meantime remove it from
684 * the freelist and try again.
688 XFS_STATS_INC(xs_qm_dqwants);
690 trace_xfs_dqreclaim_want(dqp);
691 list_del_init(&dqp->q_lru);
692 XFS_STATS_DEC(xs_qm_dquot_unused);
697 * If the dquot is dirty, flush it. If it's already being flushed, just
698 * skip it so there is time for the IO to complete before we try to
699 * reclaim it again on the next LRU pass.
701 if (!xfs_dqflock_nowait(dqp)) {
706 if (XFS_DQ_IS_DIRTY(dqp)) {
707 struct xfs_buf *bp = NULL;
710 trace_xfs_dqreclaim_dirty(dqp);
712 /* we have to drop the LRU lock to flush the dquot */
713 spin_unlock(lru_lock);
715 error = xfs_qm_dqflush(dqp, &bp);
717 xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
719 goto out_unlock_dirty;
722 xfs_buf_delwri_queue(bp, &isol->buffers);
724 goto out_unlock_dirty;
729 * Prevent lookups now that we are past the point of no return.
731 dqp->dq_flags |= XFS_DQ_FREEING;
734 ASSERT(dqp->q_nrefs == 0);
735 list_move_tail(&dqp->q_lru, &isol->dispose);
736 XFS_STATS_DEC(xs_qm_dquot_unused);
737 trace_xfs_dqreclaim_done(dqp);
738 XFS_STATS_INC(xs_qm_dqreclaims);
742 trace_xfs_dqreclaim_busy(dqp);
743 XFS_STATS_INC(xs_qm_dqreclaim_misses);
747 trace_xfs_dqreclaim_busy(dqp);
748 XFS_STATS_INC(xs_qm_dqreclaim_misses);
756 struct shrinker *shrink,
757 struct shrink_control *sc)
759 struct xfs_quotainfo *qi = container_of(shrink,
760 struct xfs_quotainfo, qi_shrinker);
761 struct xfs_qm_isolate isol;
764 unsigned long nr_to_scan = sc->nr_to_scan;
766 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
769 INIT_LIST_HEAD(&isol.buffers);
770 INIT_LIST_HEAD(&isol.dispose);
772 freed = list_lru_walk_node(&qi->qi_lru, sc->nid, xfs_qm_dquot_isolate, &isol,
775 error = xfs_buf_delwri_submit(&isol.buffers);
777 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
779 while (!list_empty(&isol.dispose)) {
780 struct xfs_dquot *dqp;
782 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
783 list_del_init(&dqp->q_lru);
784 xfs_qm_dqfree_one(dqp);
792 struct shrinker *shrink,
793 struct shrink_control *sc)
795 struct xfs_quotainfo *qi = container_of(shrink,
796 struct xfs_quotainfo, qi_shrinker);
798 return list_lru_count_node(&qi->qi_lru, sc->nid);
802 * This initializes all the quota information that's kept in the
806 xfs_qm_init_quotainfo(
809 xfs_quotainfo_t *qinf;
813 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
815 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
817 if ((error = list_lru_init(&qinf->qi_lru))) {
819 mp->m_quotainfo = NULL;
824 * See if quotainodes are setup, and if not, allocate them,
825 * and change the superblock accordingly.
827 if ((error = xfs_qm_init_quotainos(mp))) {
828 list_lru_destroy(&qinf->qi_lru);
830 mp->m_quotainfo = NULL;
834 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
835 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
836 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
837 mutex_init(&qinf->qi_tree_lock);
839 /* mutex used to serialize quotaoffs */
840 mutex_init(&qinf->qi_quotaofflock);
842 /* Precalc some constants */
843 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
844 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(mp,
845 qinf->qi_dqchunklen);
847 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
850 * We try to get the limits from the superuser's limits fields.
851 * This is quite hacky, but it is standard quota practice.
853 * We look at the USR dquot with id == 0 first, but if user quotas
854 * are not enabled we goto the GRP dquot with id == 0.
855 * We don't really care to keep separate default limits for user
856 * and group quotas, at least not at this point.
858 * Since we may not have done a quotacheck by this point, just read
859 * the dquot without attaching it to any hashtables or lists.
861 error = xfs_qm_dqread(mp, 0,
862 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
863 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
865 XFS_QMOPT_DOWARN, &dqp);
867 xfs_disk_dquot_t *ddqp = &dqp->q_core;
870 * The warnings and timers set the grace period given to
871 * a user or group before he or she can not perform any
872 * more writing. If it is zero, a default is used.
874 qinf->qi_btimelimit = ddqp->d_btimer ?
875 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
876 qinf->qi_itimelimit = ddqp->d_itimer ?
877 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
878 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
879 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
880 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
881 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
882 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
883 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
884 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
885 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
886 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
887 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
888 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
889 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
890 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
891 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
893 xfs_qm_dqdestroy(dqp);
895 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
896 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
897 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
898 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
899 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
900 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
903 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
904 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
905 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
906 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
907 register_shrinker(&qinf->qi_shrinker);
913 * Gets called when unmounting a filesystem or when all quotas get
915 * This purges the quota inodes, destroys locks and frees itself.
918 xfs_qm_destroy_quotainfo(
923 qi = mp->m_quotainfo;
926 unregister_shrinker(&qi->qi_shrinker);
927 list_lru_destroy(&qi->qi_lru);
929 if (qi->qi_uquotaip) {
930 IRELE(qi->qi_uquotaip);
931 qi->qi_uquotaip = NULL; /* paranoia */
933 if (qi->qi_gquotaip) {
934 IRELE(qi->qi_gquotaip);
935 qi->qi_gquotaip = NULL;
937 if (qi->qi_pquotaip) {
938 IRELE(qi->qi_pquotaip);
939 qi->qi_pquotaip = NULL;
941 mutex_destroy(&qi->qi_quotaofflock);
943 mp->m_quotainfo = NULL;
947 * Create an inode and return with a reference already taken, but unlocked
948 * This is how we create quota inodes
963 * With superblock that doesn't have separate pquotino, we
964 * share an inode between gquota and pquota. If the on-disk
965 * superblock has GQUOTA and the filesystem is now mounted
966 * with PQUOTA, just use sb_gquotino for sb_pquotino and
969 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
970 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
971 xfs_ino_t ino = NULLFSINO;
973 if ((flags & XFS_QMOPT_PQUOTA) &&
974 (mp->m_sb.sb_gquotino != NULLFSINO)) {
975 ino = mp->m_sb.sb_gquotino;
976 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
977 } else if ((flags & XFS_QMOPT_GQUOTA) &&
978 (mp->m_sb.sb_pquotino != NULLFSINO)) {
979 ino = mp->m_sb.sb_pquotino;
980 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
982 if (ino != NULLFSINO) {
983 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
986 mp->m_sb.sb_gquotino = NULLFSINO;
987 mp->m_sb.sb_pquotino = NULLFSINO;
991 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
992 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create,
993 XFS_QM_QINOCREATE_SPACE_RES(mp), 0);
995 xfs_trans_cancel(tp, 0);
1000 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
1003 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
1010 * Make the changes in the superblock, and log those too.
1011 * sbfields arg may contain fields other than *QUOTINO;
1012 * VERSIONNUM for example.
1014 spin_lock(&mp->m_sb_lock);
1015 if (flags & XFS_QMOPT_SBVERSION) {
1016 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
1017 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1018 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS)) ==
1019 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1020 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1023 xfs_sb_version_addquota(&mp->m_sb);
1024 mp->m_sb.sb_uquotino = NULLFSINO;
1025 mp->m_sb.sb_gquotino = NULLFSINO;
1026 mp->m_sb.sb_pquotino = NULLFSINO;
1028 /* qflags will get updated fully _after_ quotacheck */
1029 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
1031 if (flags & XFS_QMOPT_UQUOTA)
1032 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1033 else if (flags & XFS_QMOPT_GQUOTA)
1034 mp->m_sb.sb_gquotino = (*ip)->i_ino;
1036 mp->m_sb.sb_pquotino = (*ip)->i_ino;
1037 spin_unlock(&mp->m_sb_lock);
1038 xfs_mod_sb(tp, sbfields);
1040 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
1041 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
1049 xfs_qm_reset_dqcounts(
1055 struct xfs_dqblk *dqb;
1058 trace_xfs_reset_dqcounts(bp, _RET_IP_);
1061 * Reset all counters and timers. They'll be
1062 * started afresh by xfs_qm_quotacheck.
1065 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1066 do_div(j, sizeof(xfs_dqblk_t));
1067 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
1070 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
1071 struct xfs_disk_dquot *ddq;
1073 ddq = (struct xfs_disk_dquot *)&dqb[j];
1076 * Do a sanity check, and if needed, repair the dqblk. Don't
1077 * output any warnings because it's perfectly possible to
1078 * find uninitialised dquot blks. See comment in xfs_dqcheck.
1080 xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1084 ddq->d_rtbcount = 0;
1087 ddq->d_rtbtimer = 0;
1090 ddq->d_rtbwarns = 0;
1092 if (xfs_sb_version_hascrc(&mp->m_sb)) {
1093 xfs_update_cksum((char *)&dqb[j],
1094 sizeof(struct xfs_dqblk),
1102 struct xfs_mount *mp,
1105 xfs_filblks_t blkcnt,
1107 struct list_head *buffer_list)
1114 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1115 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
1119 * Blkcnt arg can be a very big number, and might even be
1120 * larger than the log itself. So, we have to break it up into
1121 * manageable-sized transactions.
1122 * Note that we don't start a permanent transaction here; we might
1123 * not be able to get a log reservation for the whole thing up front,
1124 * and we don't really care to either, because we just discard
1125 * everything if we were to crash in the middle of this loop.
1128 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1129 XFS_FSB_TO_DADDR(mp, bno),
1130 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1131 &xfs_dquot_buf_ops);
1134 * CRC and validation errors will return a EFSCORRUPTED here. If
1135 * this occurs, re-read without CRC validation so that we can
1136 * repair the damage via xfs_qm_reset_dqcounts(). This process
1137 * will leave a trace in the log indicating corruption has
1140 if (error == EFSCORRUPTED) {
1141 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1142 XFS_FSB_TO_DADDR(mp, bno),
1143 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1150 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1151 xfs_buf_delwri_queue(bp, buffer_list);
1154 /* goto the next block. */
1156 firstid += mp->m_quotainfo->qi_dqperchunk;
1163 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1164 * caller supplied function for every chunk of dquots that we find.
1168 struct xfs_mount *mp,
1169 struct xfs_inode *qip,
1171 struct list_head *buffer_list)
1173 struct xfs_bmbt_irec *map;
1174 int i, nmaps; /* number of map entries */
1175 int error; /* return value */
1176 xfs_fileoff_t lblkno;
1177 xfs_filblks_t maxlblkcnt;
1179 xfs_fsblock_t rablkno;
1180 xfs_filblks_t rablkcnt;
1184 * This looks racy, but we can't keep an inode lock across a
1185 * trans_reserve. But, this gets called during quotacheck, and that
1186 * happens only at mount time which is single threaded.
1188 if (qip->i_d.di_nblocks == 0)
1191 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1194 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
1196 nmaps = XFS_DQITER_MAP_SIZE;
1198 * We aren't changing the inode itself. Just changing
1199 * some of its data. No new blocks are added here, and
1200 * the inode is never added to the transaction.
1202 xfs_ilock(qip, XFS_ILOCK_SHARED);
1203 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1205 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1209 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1210 for (i = 0; i < nmaps; i++) {
1211 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1212 ASSERT(map[i].br_blockcount);
1215 lblkno += map[i].br_blockcount;
1217 if (map[i].br_startblock == HOLESTARTBLOCK)
1220 firstid = (xfs_dqid_t) map[i].br_startoff *
1221 mp->m_quotainfo->qi_dqperchunk;
1223 * Do a read-ahead on the next extent.
1225 if ((i+1 < nmaps) &&
1226 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1227 rablkcnt = map[i+1].br_blockcount;
1228 rablkno = map[i+1].br_startblock;
1229 while (rablkcnt--) {
1230 xfs_buf_readahead(mp->m_ddev_targp,
1231 XFS_FSB_TO_DADDR(mp, rablkno),
1232 mp->m_quotainfo->qi_dqchunklen,
1238 * Iterate thru all the blks in the extent and
1239 * reset the counters of all the dquots inside them.
1241 error = xfs_qm_dqiter_bufs(mp, firstid,
1242 map[i].br_startblock,
1243 map[i].br_blockcount,
1244 flags, buffer_list);
1248 } while (nmaps > 0);
1256 * Called by dqusage_adjust in doing a quotacheck.
1258 * Given the inode, and a dquot id this updates both the incore dqout as well
1259 * as the buffer copy. This is so that once the quotacheck is done, we can
1260 * just log all the buffers, as opposed to logging numerous updates to
1261 * individual dquots.
1264 xfs_qm_quotacheck_dqadjust(
1265 struct xfs_inode *ip,
1271 struct xfs_mount *mp = ip->i_mount;
1272 struct xfs_dquot *dqp;
1275 error = xfs_qm_dqget(mp, ip, id, type,
1276 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1279 * Shouldn't be able to turn off quotas here.
1281 ASSERT(error != ESRCH);
1282 ASSERT(error != ENOENT);
1286 trace_xfs_dqadjust(dqp);
1289 * Adjust the inode count and the block count to reflect this inode's
1292 be64_add_cpu(&dqp->q_core.d_icount, 1);
1293 dqp->q_res_icount++;
1295 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1296 dqp->q_res_bcount += nblks;
1299 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1300 dqp->q_res_rtbcount += rtblks;
1304 * Set default limits, adjust timers (since we changed usages)
1306 * There are no timers for the default values set in the root dquot.
1308 if (dqp->q_core.d_id) {
1309 xfs_qm_adjust_dqlimits(mp, dqp);
1310 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1313 dqp->dq_flags |= XFS_DQ_DIRTY;
1321 xfs_qcnt_t *O_rtblks)
1323 xfs_filblks_t rtblks; /* total rt blks */
1324 xfs_extnum_t idx; /* extent record index */
1325 xfs_ifork_t *ifp; /* inode fork pointer */
1326 xfs_extnum_t nextents; /* number of extent entries */
1329 ASSERT(XFS_IS_REALTIME_INODE(ip));
1330 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1331 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1332 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1336 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1337 for (idx = 0; idx < nextents; idx++)
1338 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1339 *O_rtblks = (xfs_qcnt_t)rtblks;
1344 * callback routine supplied to bulkstat(). Given an inumber, find its
1345 * dquots and update them to account for resources taken by that inode.
1349 xfs_qm_dqusage_adjust(
1350 xfs_mount_t *mp, /* mount point for filesystem */
1351 xfs_ino_t ino, /* inode number to get data for */
1352 void __user *buffer, /* not used */
1353 int ubsize, /* not used */
1354 int *ubused, /* not used */
1355 int *res) /* result code value */
1358 xfs_qcnt_t nblks, rtblks = 0;
1361 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1364 * rootino must have its resources accounted for, not so with the quota
1367 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1368 *res = BULKSTAT_RV_NOTHING;
1369 return XFS_ERROR(EINVAL);
1373 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1374 * interface expects the inode to be exclusively locked because that's
1375 * the case in all other instances. It's OK that we do this because
1376 * quotacheck is done only at mount time.
1378 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1380 *res = BULKSTAT_RV_NOTHING;
1384 ASSERT(ip->i_delayed_blks == 0);
1386 if (XFS_IS_REALTIME_INODE(ip)) {
1388 * Walk thru the extent list and count the realtime blocks.
1390 error = xfs_qm_get_rtblks(ip, &rtblks);
1395 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1398 * Add the (disk blocks and inode) resources occupied by this
1399 * inode to its dquots. We do this adjustment in the incore dquot,
1400 * and also copy the changes to its buffer.
1401 * We don't care about putting these changes in a transaction
1402 * envelope because if we crash in the middle of a 'quotacheck'
1403 * we have to start from the beginning anyway.
1404 * Once we're done, we'll log all the dquot bufs.
1406 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1407 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1409 if (XFS_IS_UQUOTA_ON(mp)) {
1410 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1411 XFS_DQ_USER, nblks, rtblks);
1416 if (XFS_IS_GQUOTA_ON(mp)) {
1417 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1418 XFS_DQ_GROUP, nblks, rtblks);
1423 if (XFS_IS_PQUOTA_ON(mp)) {
1424 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1425 XFS_DQ_PROJ, nblks, rtblks);
1430 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1432 *res = BULKSTAT_RV_DIDONE;
1436 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1438 *res = BULKSTAT_RV_GIVEUP;
1444 struct xfs_dquot *dqp,
1447 struct list_head *buffer_list = data;
1448 struct xfs_buf *bp = NULL;
1452 if (dqp->dq_flags & XFS_DQ_FREEING)
1454 if (!XFS_DQ_IS_DIRTY(dqp))
1458 error = xfs_qm_dqflush(dqp, &bp);
1462 xfs_buf_delwri_queue(bp, buffer_list);
1470 * Walk thru all the filesystem inodes and construct a consistent view
1471 * of the disk quota world. If the quotacheck fails, disable quotas.
1477 int done, count, error, error2;
1481 LIST_HEAD (buffer_list);
1482 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1483 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1484 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1491 ASSERT(uip || gip || pip);
1492 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1494 xfs_notice(mp, "Quotacheck needed: Please wait.");
1497 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1498 * their counters to zero. We need a clean slate.
1499 * We don't log our changes till later.
1502 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1506 flags |= XFS_UQUOTA_CHKD;
1510 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1514 flags |= XFS_GQUOTA_CHKD;
1518 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1522 flags |= XFS_PQUOTA_CHKD;
1527 * Iterate thru all the inodes in the file system,
1528 * adjusting the corresponding dquot counters in core.
1530 error = xfs_bulkstat(mp, &lastino, &count,
1531 xfs_qm_dqusage_adjust,
1532 structsz, NULL, &done);
1539 * We've made all the changes that we need to make incore. Flush them
1540 * down to disk buffers if everything was updated successfully.
1542 if (XFS_IS_UQUOTA_ON(mp)) {
1543 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1546 if (XFS_IS_GQUOTA_ON(mp)) {
1547 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1552 if (XFS_IS_PQUOTA_ON(mp)) {
1553 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1559 error2 = xfs_buf_delwri_submit(&buffer_list);
1564 * We can get this error if we couldn't do a dquot allocation inside
1565 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1566 * dirty dquots that might be cached, we just want to get rid of them
1567 * and turn quotaoff. The dquots won't be attached to any of the inodes
1568 * at this point (because we intentionally didn't in dqget_noattach).
1571 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1576 * If one type of quotas is off, then it will lose its
1577 * quotachecked status, since we won't be doing accounting for
1578 * that type anymore.
1580 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1581 mp->m_qflags |= flags;
1584 while (!list_empty(&buffer_list)) {
1585 struct xfs_buf *bp =
1586 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1587 list_del_init(&bp->b_list);
1593 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1596 * We must turn off quotas.
1598 ASSERT(mp->m_quotainfo != NULL);
1599 xfs_qm_destroy_quotainfo(mp);
1600 if (xfs_mount_reset_sbqflags(mp)) {
1602 "Quotacheck: Failed to reset quota flags.");
1605 xfs_notice(mp, "Quotacheck: Done.");
1610 * This is called after the superblock has been read in and we're ready to
1611 * iget the quota inodes.
1614 xfs_qm_init_quotainos(
1617 struct xfs_inode *uip = NULL;
1618 struct xfs_inode *gip = NULL;
1619 struct xfs_inode *pip = NULL;
1621 __int64_t sbflags = 0;
1624 ASSERT(mp->m_quotainfo);
1627 * Get the uquota and gquota inodes
1629 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1630 if (XFS_IS_UQUOTA_ON(mp) &&
1631 mp->m_sb.sb_uquotino != NULLFSINO) {
1632 ASSERT(mp->m_sb.sb_uquotino > 0);
1633 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1636 return XFS_ERROR(error);
1638 if (XFS_IS_GQUOTA_ON(mp) &&
1639 mp->m_sb.sb_gquotino != NULLFSINO) {
1640 ASSERT(mp->m_sb.sb_gquotino > 0);
1641 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1646 if (XFS_IS_PQUOTA_ON(mp) &&
1647 mp->m_sb.sb_pquotino != NULLFSINO) {
1648 ASSERT(mp->m_sb.sb_pquotino > 0);
1649 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1655 flags |= XFS_QMOPT_SBVERSION;
1656 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1657 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1662 * Create the three inodes, if they don't exist already. The changes
1663 * made above will get added to a transaction and logged in one of
1664 * the qino_alloc calls below. If the device is readonly,
1665 * temporarily switch to read-write to do this.
1667 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1668 error = xfs_qm_qino_alloc(mp, &uip,
1669 sbflags | XFS_SB_UQUOTINO,
1670 flags | XFS_QMOPT_UQUOTA);
1674 flags &= ~XFS_QMOPT_SBVERSION;
1676 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1677 error = xfs_qm_qino_alloc(mp, &gip,
1678 sbflags | XFS_SB_GQUOTINO,
1679 flags | XFS_QMOPT_GQUOTA);
1683 flags &= ~XFS_QMOPT_SBVERSION;
1685 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1686 error = xfs_qm_qino_alloc(mp, &pip,
1687 sbflags | XFS_SB_PQUOTINO,
1688 flags | XFS_QMOPT_PQUOTA);
1693 mp->m_quotainfo->qi_uquotaip = uip;
1694 mp->m_quotainfo->qi_gquotaip = gip;
1695 mp->m_quotainfo->qi_pquotaip = pip;
1706 return XFS_ERROR(error);
1711 struct xfs_dquot *dqp)
1713 struct xfs_mount *mp = dqp->q_mount;
1714 struct xfs_quotainfo *qi = mp->m_quotainfo;
1716 mutex_lock(&qi->qi_tree_lock);
1717 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1718 be32_to_cpu(dqp->q_core.d_id));
1721 mutex_unlock(&qi->qi_tree_lock);
1723 xfs_qm_dqdestroy(dqp);
1727 * Start a transaction and write the incore superblock changes to
1728 * disk. flags parameter indicates which fields have changed.
1731 xfs_qm_write_sb_changes(
1738 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1739 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
1741 xfs_trans_cancel(tp, 0);
1745 xfs_mod_sb(tp, flags);
1746 error = xfs_trans_commit(tp, 0);
1752 /* --------------- utility functions for vnodeops ---------------- */
1756 * Given an inode, a uid, gid and prid make sure that we have
1757 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1758 * quotas by creating this file.
1759 * This also attaches dquot(s) to the given inode after locking it,
1760 * and returns the dquots corresponding to the uid and/or gid.
1762 * in : inode (unlocked)
1763 * out : udquot, gdquot with references taken and unlocked
1767 struct xfs_inode *ip,
1772 struct xfs_dquot **O_udqpp,
1773 struct xfs_dquot **O_gdqpp,
1774 struct xfs_dquot **O_pdqpp)
1776 struct xfs_mount *mp = ip->i_mount;
1777 struct xfs_dquot *uq = NULL;
1778 struct xfs_dquot *gq = NULL;
1779 struct xfs_dquot *pq = NULL;
1783 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1786 lockflags = XFS_ILOCK_EXCL;
1787 xfs_ilock(ip, lockflags);
1789 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1790 gid = ip->i_d.di_gid;
1793 * Attach the dquot(s) to this inode, doing a dquot allocation
1794 * if necessary. The dquot(s) will not be locked.
1796 if (XFS_NOT_DQATTACHED(mp, ip)) {
1797 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1799 xfs_iunlock(ip, lockflags);
1804 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1805 if (ip->i_d.di_uid != uid) {
1807 * What we need is the dquot that has this uid, and
1808 * if we send the inode to dqget, the uid of the inode
1809 * takes priority over what's sent in the uid argument.
1810 * We must unlock inode here before calling dqget if
1811 * we're not sending the inode, because otherwise
1812 * we'll deadlock by doing trans_reserve while
1815 xfs_iunlock(ip, lockflags);
1816 error = xfs_qm_dqget(mp, NULL, uid,
1822 ASSERT(error != ENOENT);
1826 * Get the ilock in the right order.
1829 lockflags = XFS_ILOCK_SHARED;
1830 xfs_ilock(ip, lockflags);
1833 * Take an extra reference, because we'll return
1836 ASSERT(ip->i_udquot);
1837 uq = xfs_qm_dqhold(ip->i_udquot);
1840 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1841 if (ip->i_d.di_gid != gid) {
1842 xfs_iunlock(ip, lockflags);
1843 error = xfs_qm_dqget(mp, NULL, gid,
1849 ASSERT(error != ENOENT);
1853 lockflags = XFS_ILOCK_SHARED;
1854 xfs_ilock(ip, lockflags);
1856 ASSERT(ip->i_gdquot);
1857 gq = xfs_qm_dqhold(ip->i_gdquot);
1860 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1861 if (xfs_get_projid(ip) != prid) {
1862 xfs_iunlock(ip, lockflags);
1863 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1869 ASSERT(error != ENOENT);
1873 lockflags = XFS_ILOCK_SHARED;
1874 xfs_ilock(ip, lockflags);
1876 ASSERT(ip->i_pdquot);
1877 pq = xfs_qm_dqhold(ip->i_pdquot);
1881 trace_xfs_dquot_dqalloc(ip);
1883 xfs_iunlock(ip, lockflags);
1907 * Actually transfer ownership, and do dquot modifications.
1908 * These were already reserved.
1914 xfs_dquot_t **IO_olddq,
1917 xfs_dquot_t *prevdq;
1918 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1919 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1922 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1923 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1928 ASSERT(prevdq != newdq);
1930 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1931 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1933 /* the sparkling new dquot */
1934 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1935 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1938 * Take an extra reference, because the inode is going to keep
1939 * this dquot pointer even after the trans_commit.
1941 *IO_olddq = xfs_qm_dqhold(newdq);
1947 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1950 xfs_qm_vop_chown_reserve(
1951 struct xfs_trans *tp,
1952 struct xfs_inode *ip,
1953 struct xfs_dquot *udqp,
1954 struct xfs_dquot *gdqp,
1955 struct xfs_dquot *pdqp,
1958 struct xfs_mount *mp = ip->i_mount;
1959 uint delblks, blkflags, prjflags = 0;
1960 struct xfs_dquot *udq_unres = NULL;
1961 struct xfs_dquot *gdq_unres = NULL;
1962 struct xfs_dquot *pdq_unres = NULL;
1963 struct xfs_dquot *udq_delblks = NULL;
1964 struct xfs_dquot *gdq_delblks = NULL;
1965 struct xfs_dquot *pdq_delblks = NULL;
1969 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1970 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1972 delblks = ip->i_delayed_blks;
1973 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1974 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1976 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1977 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
1980 * If there are delayed allocation blocks, then we have to
1981 * unreserve those from the old dquot, and add them to the
1985 ASSERT(ip->i_udquot);
1986 udq_unres = ip->i_udquot;
1989 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1990 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1993 ASSERT(ip->i_gdquot);
1994 gdq_unres = ip->i_gdquot;
1998 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1999 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
2000 prjflags = XFS_QMOPT_ENOSPC;
2003 ASSERT(ip->i_pdquot);
2004 pdq_unres = ip->i_pdquot;
2008 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2009 udq_delblks, gdq_delblks, pdq_delblks,
2010 ip->i_d.di_nblocks, 1,
2011 flags | blkflags | prjflags);
2016 * Do the delayed blks reservations/unreservations now. Since, these
2017 * are done without the help of a transaction, if a reservation fails
2018 * its previous reservations won't be automatically undone by trans
2019 * code. So, we have to do it manually here.
2023 * Do the reservations first. Unreservation can't fail.
2025 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
2026 ASSERT(udq_unres || gdq_unres || pdq_unres);
2027 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2028 udq_delblks, gdq_delblks, pdq_delblks,
2029 (xfs_qcnt_t)delblks, 0,
2030 flags | blkflags | prjflags);
2033 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2034 udq_unres, gdq_unres, pdq_unres,
2035 -((xfs_qcnt_t)delblks), 0, blkflags);
2042 xfs_qm_vop_rename_dqattach(
2043 struct xfs_inode **i_tab)
2045 struct xfs_mount *mp = i_tab[0]->i_mount;
2048 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2051 for (i = 0; (i < 4 && i_tab[i]); i++) {
2052 struct xfs_inode *ip = i_tab[i];
2056 * Watch out for duplicate entries in the table.
2058 if (i == 0 || ip != i_tab[i-1]) {
2059 if (XFS_NOT_DQATTACHED(mp, ip)) {
2060 error = xfs_qm_dqattach(ip, 0);
2070 xfs_qm_vop_create_dqattach(
2071 struct xfs_trans *tp,
2072 struct xfs_inode *ip,
2073 struct xfs_dquot *udqp,
2074 struct xfs_dquot *gdqp,
2075 struct xfs_dquot *pdqp)
2077 struct xfs_mount *mp = tp->t_mountp;
2079 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2082 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2083 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2086 ASSERT(ip->i_udquot == NULL);
2087 ASSERT(XFS_IS_UQUOTA_ON(mp));
2088 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
2090 ip->i_udquot = xfs_qm_dqhold(udqp);
2091 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2094 ASSERT(ip->i_gdquot == NULL);
2095 ASSERT(XFS_IS_GQUOTA_ON(mp));
2096 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
2097 ip->i_gdquot = xfs_qm_dqhold(gdqp);
2098 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2101 ASSERT(ip->i_pdquot == NULL);
2102 ASSERT(XFS_IS_PQUOTA_ON(mp));
2103 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
2105 ip->i_pdquot = xfs_qm_dqhold(pdqp);
2106 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);