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_format.h"
23 #include "xfs_trans.h"
26 #include "xfs_alloc.h"
27 #include "xfs_quota.h"
28 #include "xfs_mount.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_ialloc_btree.h"
31 #include "xfs_dinode.h"
32 #include "xfs_inode.h"
33 #include "xfs_ialloc.h"
34 #include "xfs_itable.h"
35 #include "xfs_rtalloc.h"
36 #include "xfs_error.h"
39 #include "xfs_buf_item.h"
40 #include "xfs_trans_space.h"
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 *);
56 STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
58 * We use the batch lookup interface to iterate over the dquots as it
59 * currently is the only interface into the radix tree code that allows
60 * fuzzy lookups instead of exact matches. Holding the lock over multiple
61 * operations is fine as all callers are used either during mount/umount
64 #define XFS_DQ_LOOKUP_BATCH 32
70 int (*execute)(struct xfs_dquot *dqp, void *data),
73 struct xfs_quotainfo *qi = mp->m_quotainfo;
74 struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
86 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
90 mutex_lock(&qi->qi_tree_lock);
91 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
92 next_index, XFS_DQ_LOOKUP_BATCH);
94 mutex_unlock(&qi->qi_tree_lock);
98 for (i = 0; i < nr_found; i++) {
99 struct xfs_dquot *dqp = batch[i];
101 next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
103 error = execute(batch[i], data);
104 if (error == EAGAIN) {
108 if (error && last_error != EFSCORRUPTED)
112 mutex_unlock(&qi->qi_tree_lock);
114 /* bail out if the filesystem is corrupted. */
115 if (last_error == EFSCORRUPTED) {
131 * Purge a dquot from all tracking data structures and free it.
135 struct xfs_dquot *dqp,
138 struct xfs_mount *mp = dqp->q_mount;
139 struct xfs_quotainfo *qi = mp->m_quotainfo;
140 struct xfs_dquot *gdqp = NULL;
141 struct xfs_dquot *pdqp = NULL;
144 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
150 * If this quota has a hint attached, prepare for releasing it now.
152 gdqp = dqp->q_gdquot;
155 dqp->q_gdquot = NULL;
158 pdqp = dqp->q_pdquot;
161 dqp->q_pdquot = NULL;
164 dqp->dq_flags |= XFS_DQ_FREEING;
169 * If we are turning this type of quotas off, we don't care
170 * about the dirty metadata sitting in this dquot. OTOH, if
171 * we're unmounting, we do care, so we flush it and wait.
173 if (XFS_DQ_IS_DIRTY(dqp)) {
174 struct xfs_buf *bp = NULL;
178 * We don't care about getting disk errors here. We need
179 * to purge this dquot anyway, so we go ahead regardless.
181 error = xfs_qm_dqflush(dqp, &bp);
183 xfs_warn(mp, "%s: dquot %p flush failed",
186 error = xfs_bwrite(bp);
192 ASSERT(atomic_read(&dqp->q_pincount) == 0);
193 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
194 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
199 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
200 be32_to_cpu(dqp->q_core.d_id));
204 * We move dquots to the freelist as soon as their reference count
205 * hits zero, so it really should be on the freelist here.
207 ASSERT(!list_empty(&dqp->q_lru));
208 list_lru_del(&qi->qi_lru, &dqp->q_lru);
209 XFS_STATS_DEC(xs_qm_dquot_unused);
211 xfs_qm_dqdestroy(dqp);
221 * Purge the dquot cache.
225 struct xfs_mount *mp,
228 if (flags & XFS_QMOPT_UQUOTA)
229 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
230 if (flags & XFS_QMOPT_GQUOTA)
231 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
232 if (flags & XFS_QMOPT_PQUOTA)
233 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
237 * Just destroy the quotainfo structure.
241 struct xfs_mount *mp)
243 if (mp->m_quotainfo) {
244 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
245 xfs_qm_destroy_quotainfo(mp);
251 * This is called from xfs_mountfs to start quotas and initialize all
252 * necessary data structures like quotainfo. This is also responsible for
253 * running a quotacheck as necessary. We are guaranteed that the superblock
254 * is consistently read in at this point.
256 * If we fail here, the mount will continue with quota turned off. We don't
257 * need to inidicate success or failure at all.
267 * If quotas on realtime volumes is not supported, we disable
268 * quotas immediately.
270 if (mp->m_sb.sb_rextents) {
271 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
276 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
279 * Allocate the quotainfo structure inside the mount struct, and
280 * create quotainode(s), and change/rev superblock if necessary.
282 error = xfs_qm_init_quotainfo(mp);
285 * We must turn off quotas.
287 ASSERT(mp->m_quotainfo == NULL);
292 * If any of the quotas are not consistent, do a quotacheck.
294 if (XFS_QM_NEED_QUOTACHECK(mp)) {
295 error = xfs_qm_quotacheck(mp);
297 /* Quotacheck failed and disabled quotas. */
302 * If one type of quotas is off, then it will lose its
303 * quotachecked status, since we won't be doing accounting for
306 if (!XFS_IS_UQUOTA_ON(mp))
307 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
308 if (!XFS_IS_GQUOTA_ON(mp))
309 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
310 if (!XFS_IS_PQUOTA_ON(mp))
311 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
315 * We actually don't have to acquire the m_sb_lock at all.
316 * This can only be called from mount, and that's single threaded. XXX
318 spin_lock(&mp->m_sb_lock);
319 sbf = mp->m_sb.sb_qflags;
320 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
321 spin_unlock(&mp->m_sb_lock);
323 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
324 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
326 * We could only have been turning quotas off.
327 * We aren't in very good shape actually because
328 * the incore structures are convinced that quotas are
329 * off, but the on disk superblock doesn't know that !
331 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
332 xfs_alert(mp, "%s: Superblock update failed!",
338 xfs_warn(mp, "Failed to initialize disk quotas.");
344 * Called from the vfsops layer.
347 xfs_qm_unmount_quotas(
351 * Release the dquots that root inode, et al might be holding,
352 * before we flush quotas and blow away the quotainfo structure.
354 ASSERT(mp->m_rootip);
355 xfs_qm_dqdetach(mp->m_rootip);
357 xfs_qm_dqdetach(mp->m_rbmip);
359 xfs_qm_dqdetach(mp->m_rsumip);
362 * Release the quota inodes.
364 if (mp->m_quotainfo) {
365 if (mp->m_quotainfo->qi_uquotaip) {
366 IRELE(mp->m_quotainfo->qi_uquotaip);
367 mp->m_quotainfo->qi_uquotaip = NULL;
369 if (mp->m_quotainfo->qi_gquotaip) {
370 IRELE(mp->m_quotainfo->qi_gquotaip);
371 mp->m_quotainfo->qi_gquotaip = NULL;
373 if (mp->m_quotainfo->qi_pquotaip) {
374 IRELE(mp->m_quotainfo->qi_pquotaip);
375 mp->m_quotainfo->qi_pquotaip = NULL;
386 xfs_dquot_t *udqhint, /* hint */
387 xfs_dquot_t **IO_idqpp)
392 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
396 * See if we already have it in the inode itself. IO_idqpp is
397 * &i_udquot or &i_gdquot. This made the code look weird, but
398 * made the logic a lot simpler.
402 trace_xfs_dqattach_found(dqp);
407 * udqhint is the i_udquot field in inode, and is non-NULL only
408 * when the type arg is group/project. Its purpose is to save a
409 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
413 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
417 * No need to take dqlock to look at the id.
419 * The ID can't change until it gets reclaimed, and it won't
420 * be reclaimed as long as we have a ref from inode and we
423 if (type == XFS_DQ_GROUP)
424 dqp = udqhint->q_gdquot;
426 dqp = udqhint->q_pdquot;
427 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
428 ASSERT(*IO_idqpp == NULL);
430 *IO_idqpp = xfs_qm_dqhold(dqp);
431 xfs_dqunlock(udqhint);
436 * We can't hold a dquot lock when we call the dqget code.
437 * We'll deadlock in no time, because of (not conforming to)
438 * lock ordering - the inodelock comes before any dquot lock,
439 * and we may drop and reacquire the ilock in xfs_qm_dqget().
441 xfs_dqunlock(udqhint);
445 * Find the dquot from somewhere. This bumps the
446 * reference count of dquot and returns it locked.
447 * This can return ENOENT if dquot didn't exist on
448 * disk and we didn't ask it to allocate;
449 * ESRCH if quotas got turned off suddenly.
451 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
452 doalloc | XFS_QMOPT_DOWARN, &dqp);
456 trace_xfs_dqattach_get(dqp);
459 * dqget may have dropped and re-acquired the ilock, but it guarantees
460 * that the dquot returned is the one that should go in the inode.
469 * Given a udquot and group/project type, attach the group/project
470 * dquot pointer to the udquot as a hint for future lookups.
473 xfs_qm_dqattach_hint(
474 struct xfs_inode *ip,
477 struct xfs_dquot **dqhintp;
478 struct xfs_dquot *dqp;
479 struct xfs_dquot *udq = ip->i_udquot;
481 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
485 if (type == XFS_DQ_GROUP) {
487 dqhintp = &udq->q_gdquot;
490 dqhintp = &udq->q_pdquot;
494 struct xfs_dquot *tmp;
504 *dqhintp = xfs_qm_dqhold(dqp);
510 xfs_qm_need_dqattach(
511 struct xfs_inode *ip)
513 struct xfs_mount *mp = ip->i_mount;
515 if (!XFS_IS_QUOTA_RUNNING(mp))
517 if (!XFS_IS_QUOTA_ON(mp))
519 if (!XFS_NOT_DQATTACHED(mp, ip))
521 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
527 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
529 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
530 * Inode may get unlocked and relocked in here, and the caller must deal with
534 xfs_qm_dqattach_locked(
538 xfs_mount_t *mp = ip->i_mount;
542 if (!xfs_qm_need_dqattach(ip))
545 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
547 if (XFS_IS_UQUOTA_ON(mp)) {
548 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
549 flags & XFS_QMOPT_DQALLOC,
550 NULL, &ip->i_udquot);
556 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
557 if (XFS_IS_GQUOTA_ON(mp)) {
558 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
559 flags & XFS_QMOPT_DQALLOC,
560 ip->i_udquot, &ip->i_gdquot);
562 * Don't worry about the udquot that we may have
563 * attached above. It'll get detached, if not already.
570 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
571 if (XFS_IS_PQUOTA_ON(mp)) {
572 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
573 flags & XFS_QMOPT_DQALLOC,
574 ip->i_udquot, &ip->i_pdquot);
576 * Don't worry about the udquot that we may have
577 * attached above. It'll get detached, if not already.
585 * Attach this group/project quota to the user quota as a hint.
586 * This WON'T, in general, result in a thrash.
588 if (nquotas > 1 && ip->i_udquot) {
589 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
590 ASSERT(ip->i_gdquot || !XFS_IS_GQUOTA_ON(mp));
591 ASSERT(ip->i_pdquot || !XFS_IS_PQUOTA_ON(mp));
594 * We do not have i_udquot locked at this point, but this check
595 * is OK since we don't depend on the i_gdquot to be accurate
596 * 100% all the time. It is just a hint, and this will
597 * succeed in general.
599 if (ip->i_udquot->q_gdquot != ip->i_gdquot)
600 xfs_qm_dqattach_hint(ip, XFS_DQ_GROUP);
602 if (ip->i_udquot->q_pdquot != ip->i_pdquot)
603 xfs_qm_dqattach_hint(ip, XFS_DQ_PROJ);
609 if (XFS_IS_UQUOTA_ON(mp))
610 ASSERT(ip->i_udquot);
611 if (XFS_IS_GQUOTA_ON(mp))
612 ASSERT(ip->i_gdquot);
613 if (XFS_IS_PQUOTA_ON(mp))
614 ASSERT(ip->i_pdquot);
616 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
623 struct xfs_inode *ip,
628 if (!xfs_qm_need_dqattach(ip))
631 xfs_ilock(ip, XFS_ILOCK_EXCL);
632 error = xfs_qm_dqattach_locked(ip, flags);
633 xfs_iunlock(ip, XFS_ILOCK_EXCL);
639 * Release dquots (and their references) if any.
640 * The inode should be locked EXCL except when this's called by
647 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
650 trace_xfs_dquot_dqdetach(ip);
652 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
654 xfs_qm_dqrele(ip->i_udquot);
658 xfs_qm_dqrele(ip->i_gdquot);
662 xfs_qm_dqrele(ip->i_pdquot);
668 xfs_qm_calc_dquots_per_chunk(
669 struct xfs_mount *mp,
670 unsigned int nbblks) /* basic block units */
672 unsigned int ndquots;
675 ndquots = BBTOB(nbblks);
676 do_div(ndquots, sizeof(xfs_dqblk_t));
681 struct xfs_qm_isolate {
682 struct list_head buffers;
683 struct list_head dispose;
686 static enum lru_status
687 xfs_qm_dquot_isolate(
688 struct list_head *item,
689 spinlock_t *lru_lock,
692 struct xfs_dquot *dqp = container_of(item,
693 struct xfs_dquot, q_lru);
694 struct xfs_qm_isolate *isol = arg;
696 if (!xfs_dqlock_nowait(dqp))
700 * This dquot has acquired a reference in the meantime remove it from
701 * the freelist and try again.
705 XFS_STATS_INC(xs_qm_dqwants);
707 trace_xfs_dqreclaim_want(dqp);
708 list_del_init(&dqp->q_lru);
709 XFS_STATS_DEC(xs_qm_dquot_unused);
714 * If the dquot is dirty, flush it. If it's already being flushed, just
715 * skip it so there is time for the IO to complete before we try to
716 * reclaim it again on the next LRU pass.
718 if (!xfs_dqflock_nowait(dqp)) {
723 if (XFS_DQ_IS_DIRTY(dqp)) {
724 struct xfs_buf *bp = NULL;
727 trace_xfs_dqreclaim_dirty(dqp);
729 /* we have to drop the LRU lock to flush the dquot */
730 spin_unlock(lru_lock);
732 error = xfs_qm_dqflush(dqp, &bp);
734 xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
736 goto out_unlock_dirty;
739 xfs_buf_delwri_queue(bp, &isol->buffers);
741 goto out_unlock_dirty;
746 * Prevent lookups now that we are past the point of no return.
748 dqp->dq_flags |= XFS_DQ_FREEING;
751 ASSERT(dqp->q_nrefs == 0);
752 list_move_tail(&dqp->q_lru, &isol->dispose);
753 XFS_STATS_DEC(xs_qm_dquot_unused);
754 trace_xfs_dqreclaim_done(dqp);
755 XFS_STATS_INC(xs_qm_dqreclaims);
759 trace_xfs_dqreclaim_busy(dqp);
760 XFS_STATS_INC(xs_qm_dqreclaim_misses);
764 trace_xfs_dqreclaim_busy(dqp);
765 XFS_STATS_INC(xs_qm_dqreclaim_misses);
771 struct shrinker *shrink,
772 struct shrink_control *sc)
774 struct xfs_quotainfo *qi = container_of(shrink,
775 struct xfs_quotainfo, qi_shrinker);
776 struct xfs_qm_isolate isol;
779 unsigned long nr_to_scan = sc->nr_to_scan;
781 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
784 INIT_LIST_HEAD(&isol.buffers);
785 INIT_LIST_HEAD(&isol.dispose);
787 freed = list_lru_walk_node(&qi->qi_lru, sc->nid, xfs_qm_dquot_isolate, &isol,
790 error = xfs_buf_delwri_submit(&isol.buffers);
792 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
794 while (!list_empty(&isol.dispose)) {
795 struct xfs_dquot *dqp;
797 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
798 list_del_init(&dqp->q_lru);
799 xfs_qm_dqfree_one(dqp);
807 struct shrinker *shrink,
808 struct shrink_control *sc)
810 struct xfs_quotainfo *qi = container_of(shrink,
811 struct xfs_quotainfo, qi_shrinker);
813 return list_lru_count_node(&qi->qi_lru, sc->nid);
817 * This initializes all the quota information that's kept in the
821 xfs_qm_init_quotainfo(
824 xfs_quotainfo_t *qinf;
828 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
830 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
833 * See if quotainodes are setup, and if not, allocate them,
834 * and change the superblock accordingly.
836 if ((error = xfs_qm_init_quotainos(mp))) {
838 mp->m_quotainfo = NULL;
842 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
843 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
844 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
845 mutex_init(&qinf->qi_tree_lock);
847 list_lru_init(&qinf->qi_lru);
849 /* mutex used to serialize quotaoffs */
850 mutex_init(&qinf->qi_quotaofflock);
852 /* Precalc some constants */
853 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
854 qinf->qi_dqperchunk = xfs_qm_calc_dquots_per_chunk(mp,
855 qinf->qi_dqchunklen);
857 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
860 * We try to get the limits from the superuser's limits fields.
861 * This is quite hacky, but it is standard quota practice.
863 * We look at the USR dquot with id == 0 first, but if user quotas
864 * are not enabled we goto the GRP dquot with id == 0.
865 * We don't really care to keep separate default limits for user
866 * and group quotas, at least not at this point.
868 * Since we may not have done a quotacheck by this point, just read
869 * the dquot without attaching it to any hashtables or lists.
871 error = xfs_qm_dqread(mp, 0,
872 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
873 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
875 XFS_QMOPT_DOWARN, &dqp);
877 xfs_disk_dquot_t *ddqp = &dqp->q_core;
880 * The warnings and timers set the grace period given to
881 * a user or group before he or she can not perform any
882 * more writing. If it is zero, a default is used.
884 qinf->qi_btimelimit = ddqp->d_btimer ?
885 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
886 qinf->qi_itimelimit = ddqp->d_itimer ?
887 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
888 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
889 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
890 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
891 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
892 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
893 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
894 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
895 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
896 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
897 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
898 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
899 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
900 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
901 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
903 xfs_qm_dqdestroy(dqp);
905 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
906 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
907 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
908 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
909 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
910 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
913 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
914 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
915 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
916 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
917 register_shrinker(&qinf->qi_shrinker);
923 * Gets called when unmounting a filesystem or when all quotas get
925 * This purges the quota inodes, destroys locks and frees itself.
928 xfs_qm_destroy_quotainfo(
933 qi = mp->m_quotainfo;
936 unregister_shrinker(&qi->qi_shrinker);
938 if (qi->qi_uquotaip) {
939 IRELE(qi->qi_uquotaip);
940 qi->qi_uquotaip = NULL; /* paranoia */
942 if (qi->qi_gquotaip) {
943 IRELE(qi->qi_gquotaip);
944 qi->qi_gquotaip = NULL;
946 if (qi->qi_pquotaip) {
947 IRELE(qi->qi_pquotaip);
948 qi->qi_pquotaip = NULL;
950 mutex_destroy(&qi->qi_quotaofflock);
952 mp->m_quotainfo = NULL;
956 * Create an inode and return with a reference already taken, but unlocked
957 * This is how we create quota inodes
972 * With superblock that doesn't have separate pquotino, we
973 * share an inode between gquota and pquota. If the on-disk
974 * superblock has GQUOTA and the filesystem is now mounted
975 * with PQUOTA, just use sb_gquotino for sb_pquotino and
978 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
979 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
980 xfs_ino_t ino = NULLFSINO;
982 if ((flags & XFS_QMOPT_PQUOTA) &&
983 (mp->m_sb.sb_gquotino != NULLFSINO)) {
984 ino = mp->m_sb.sb_gquotino;
985 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
986 } else if ((flags & XFS_QMOPT_GQUOTA) &&
987 (mp->m_sb.sb_pquotino != NULLFSINO)) {
988 ino = mp->m_sb.sb_pquotino;
989 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
991 if (ino != NULLFSINO) {
992 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
995 mp->m_sb.sb_gquotino = NULLFSINO;
996 mp->m_sb.sb_pquotino = NULLFSINO;
1000 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
1001 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create,
1002 XFS_QM_QINOCREATE_SPACE_RES(mp), 0);
1004 xfs_trans_cancel(tp, 0);
1009 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
1012 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
1019 * Make the changes in the superblock, and log those too.
1020 * sbfields arg may contain fields other than *QUOTINO;
1021 * VERSIONNUM for example.
1023 spin_lock(&mp->m_sb_lock);
1024 if (flags & XFS_QMOPT_SBVERSION) {
1025 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
1026 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1027 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS)) ==
1028 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1029 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1032 xfs_sb_version_addquota(&mp->m_sb);
1033 mp->m_sb.sb_uquotino = NULLFSINO;
1034 mp->m_sb.sb_gquotino = NULLFSINO;
1035 mp->m_sb.sb_pquotino = NULLFSINO;
1037 /* qflags will get updated fully _after_ quotacheck */
1038 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
1040 if (flags & XFS_QMOPT_UQUOTA)
1041 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1042 else if (flags & XFS_QMOPT_GQUOTA)
1043 mp->m_sb.sb_gquotino = (*ip)->i_ino;
1045 mp->m_sb.sb_pquotino = (*ip)->i_ino;
1046 spin_unlock(&mp->m_sb_lock);
1047 xfs_mod_sb(tp, sbfields);
1049 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
1050 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
1058 xfs_qm_reset_dqcounts(
1064 struct xfs_dqblk *dqb;
1067 trace_xfs_reset_dqcounts(bp, _RET_IP_);
1070 * Reset all counters and timers. They'll be
1071 * started afresh by xfs_qm_quotacheck.
1074 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1075 do_div(j, sizeof(xfs_dqblk_t));
1076 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
1079 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
1080 struct xfs_disk_dquot *ddq;
1082 ddq = (struct xfs_disk_dquot *)&dqb[j];
1085 * Do a sanity check, and if needed, repair the dqblk. Don't
1086 * output any warnings because it's perfectly possible to
1087 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
1089 (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1093 ddq->d_rtbcount = 0;
1096 ddq->d_rtbtimer = 0;
1099 ddq->d_rtbwarns = 0;
1101 if (xfs_sb_version_hascrc(&mp->m_sb)) {
1102 xfs_update_cksum((char *)&dqb[j],
1103 sizeof(struct xfs_dqblk),
1111 struct xfs_mount *mp,
1114 xfs_filblks_t blkcnt,
1116 struct list_head *buffer_list)
1123 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1124 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
1128 * Blkcnt arg can be a very big number, and might even be
1129 * larger than the log itself. So, we have to break it up into
1130 * manageable-sized transactions.
1131 * Note that we don't start a permanent transaction here; we might
1132 * not be able to get a log reservation for the whole thing up front,
1133 * and we don't really care to either, because we just discard
1134 * everything if we were to crash in the middle of this loop.
1137 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1138 XFS_FSB_TO_DADDR(mp, bno),
1139 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1140 &xfs_dquot_buf_ops);
1143 * CRC and validation errors will return a EFSCORRUPTED here. If
1144 * this occurs, re-read without CRC validation so that we can
1145 * repair the damage via xfs_qm_reset_dqcounts(). This process
1146 * will leave a trace in the log indicating corruption has
1149 if (error == EFSCORRUPTED) {
1150 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1151 XFS_FSB_TO_DADDR(mp, bno),
1152 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1159 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1160 xfs_buf_delwri_queue(bp, buffer_list);
1163 /* goto the next block. */
1165 firstid += mp->m_quotainfo->qi_dqperchunk;
1172 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1173 * caller supplied function for every chunk of dquots that we find.
1177 struct xfs_mount *mp,
1178 struct xfs_inode *qip,
1180 struct list_head *buffer_list)
1182 struct xfs_bmbt_irec *map;
1183 int i, nmaps; /* number of map entries */
1184 int error; /* return value */
1185 xfs_fileoff_t lblkno;
1186 xfs_filblks_t maxlblkcnt;
1188 xfs_fsblock_t rablkno;
1189 xfs_filblks_t rablkcnt;
1193 * This looks racy, but we can't keep an inode lock across a
1194 * trans_reserve. But, this gets called during quotacheck, and that
1195 * happens only at mount time which is single threaded.
1197 if (qip->i_d.di_nblocks == 0)
1200 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1203 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
1205 nmaps = XFS_DQITER_MAP_SIZE;
1207 * We aren't changing the inode itself. Just changing
1208 * some of its data. No new blocks are added here, and
1209 * the inode is never added to the transaction.
1211 xfs_ilock(qip, XFS_ILOCK_SHARED);
1212 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1214 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1218 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1219 for (i = 0; i < nmaps; i++) {
1220 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1221 ASSERT(map[i].br_blockcount);
1224 lblkno += map[i].br_blockcount;
1226 if (map[i].br_startblock == HOLESTARTBLOCK)
1229 firstid = (xfs_dqid_t) map[i].br_startoff *
1230 mp->m_quotainfo->qi_dqperchunk;
1232 * Do a read-ahead on the next extent.
1234 if ((i+1 < nmaps) &&
1235 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1236 rablkcnt = map[i+1].br_blockcount;
1237 rablkno = map[i+1].br_startblock;
1238 while (rablkcnt--) {
1239 xfs_buf_readahead(mp->m_ddev_targp,
1240 XFS_FSB_TO_DADDR(mp, rablkno),
1241 mp->m_quotainfo->qi_dqchunklen,
1247 * Iterate thru all the blks in the extent and
1248 * reset the counters of all the dquots inside them.
1250 error = xfs_qm_dqiter_bufs(mp, firstid,
1251 map[i].br_startblock,
1252 map[i].br_blockcount,
1253 flags, buffer_list);
1257 } while (nmaps > 0);
1265 * Called by dqusage_adjust in doing a quotacheck.
1267 * Given the inode, and a dquot id this updates both the incore dqout as well
1268 * as the buffer copy. This is so that once the quotacheck is done, we can
1269 * just log all the buffers, as opposed to logging numerous updates to
1270 * individual dquots.
1273 xfs_qm_quotacheck_dqadjust(
1274 struct xfs_inode *ip,
1280 struct xfs_mount *mp = ip->i_mount;
1281 struct xfs_dquot *dqp;
1284 error = xfs_qm_dqget(mp, ip, id, type,
1285 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1288 * Shouldn't be able to turn off quotas here.
1290 ASSERT(error != ESRCH);
1291 ASSERT(error != ENOENT);
1295 trace_xfs_dqadjust(dqp);
1298 * Adjust the inode count and the block count to reflect this inode's
1301 be64_add_cpu(&dqp->q_core.d_icount, 1);
1302 dqp->q_res_icount++;
1304 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1305 dqp->q_res_bcount += nblks;
1308 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1309 dqp->q_res_rtbcount += rtblks;
1313 * Set default limits, adjust timers (since we changed usages)
1315 * There are no timers for the default values set in the root dquot.
1317 if (dqp->q_core.d_id) {
1318 xfs_qm_adjust_dqlimits(mp, dqp);
1319 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1322 dqp->dq_flags |= XFS_DQ_DIRTY;
1330 xfs_qcnt_t *O_rtblks)
1332 xfs_filblks_t rtblks; /* total rt blks */
1333 xfs_extnum_t idx; /* extent record index */
1334 xfs_ifork_t *ifp; /* inode fork pointer */
1335 xfs_extnum_t nextents; /* number of extent entries */
1338 ASSERT(XFS_IS_REALTIME_INODE(ip));
1339 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1340 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1341 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1345 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1346 for (idx = 0; idx < nextents; idx++)
1347 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1348 *O_rtblks = (xfs_qcnt_t)rtblks;
1353 * callback routine supplied to bulkstat(). Given an inumber, find its
1354 * dquots and update them to account for resources taken by that inode.
1358 xfs_qm_dqusage_adjust(
1359 xfs_mount_t *mp, /* mount point for filesystem */
1360 xfs_ino_t ino, /* inode number to get data for */
1361 void __user *buffer, /* not used */
1362 int ubsize, /* not used */
1363 int *ubused, /* not used */
1364 int *res) /* result code value */
1367 xfs_qcnt_t nblks, rtblks = 0;
1370 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1373 * rootino must have its resources accounted for, not so with the quota
1376 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1377 *res = BULKSTAT_RV_NOTHING;
1378 return XFS_ERROR(EINVAL);
1382 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1383 * interface expects the inode to be exclusively locked because that's
1384 * the case in all other instances. It's OK that we do this because
1385 * quotacheck is done only at mount time.
1387 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1389 *res = BULKSTAT_RV_NOTHING;
1393 ASSERT(ip->i_delayed_blks == 0);
1395 if (XFS_IS_REALTIME_INODE(ip)) {
1397 * Walk thru the extent list and count the realtime blocks.
1399 error = xfs_qm_get_rtblks(ip, &rtblks);
1404 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1407 * Add the (disk blocks and inode) resources occupied by this
1408 * inode to its dquots. We do this adjustment in the incore dquot,
1409 * and also copy the changes to its buffer.
1410 * We don't care about putting these changes in a transaction
1411 * envelope because if we crash in the middle of a 'quotacheck'
1412 * we have to start from the beginning anyway.
1413 * Once we're done, we'll log all the dquot bufs.
1415 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1416 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1418 if (XFS_IS_UQUOTA_ON(mp)) {
1419 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1420 XFS_DQ_USER, nblks, rtblks);
1425 if (XFS_IS_GQUOTA_ON(mp)) {
1426 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1427 XFS_DQ_GROUP, nblks, rtblks);
1432 if (XFS_IS_PQUOTA_ON(mp)) {
1433 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1434 XFS_DQ_PROJ, nblks, rtblks);
1439 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1441 *res = BULKSTAT_RV_DIDONE;
1445 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1447 *res = BULKSTAT_RV_GIVEUP;
1453 struct xfs_dquot *dqp,
1456 struct list_head *buffer_list = data;
1457 struct xfs_buf *bp = NULL;
1461 if (dqp->dq_flags & XFS_DQ_FREEING)
1463 if (!XFS_DQ_IS_DIRTY(dqp))
1467 error = xfs_qm_dqflush(dqp, &bp);
1471 xfs_buf_delwri_queue(bp, buffer_list);
1479 * Walk thru all the filesystem inodes and construct a consistent view
1480 * of the disk quota world. If the quotacheck fails, disable quotas.
1486 int done, count, error, error2;
1490 LIST_HEAD (buffer_list);
1491 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1492 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1493 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1500 ASSERT(uip || gip || pip);
1501 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1503 xfs_notice(mp, "Quotacheck needed: Please wait.");
1506 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1507 * their counters to zero. We need a clean slate.
1508 * We don't log our changes till later.
1511 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1515 flags |= XFS_UQUOTA_CHKD;
1519 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1523 flags |= XFS_GQUOTA_CHKD;
1527 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1531 flags |= XFS_PQUOTA_CHKD;
1536 * Iterate thru all the inodes in the file system,
1537 * adjusting the corresponding dquot counters in core.
1539 error = xfs_bulkstat(mp, &lastino, &count,
1540 xfs_qm_dqusage_adjust,
1541 structsz, NULL, &done);
1548 * We've made all the changes that we need to make incore. Flush them
1549 * down to disk buffers if everything was updated successfully.
1551 if (XFS_IS_UQUOTA_ON(mp)) {
1552 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1555 if (XFS_IS_GQUOTA_ON(mp)) {
1556 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1561 if (XFS_IS_PQUOTA_ON(mp)) {
1562 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1568 error2 = xfs_buf_delwri_submit(&buffer_list);
1573 * We can get this error if we couldn't do a dquot allocation inside
1574 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1575 * dirty dquots that might be cached, we just want to get rid of them
1576 * and turn quotaoff. The dquots won't be attached to any of the inodes
1577 * at this point (because we intentionally didn't in dqget_noattach).
1580 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1585 * If one type of quotas is off, then it will lose its
1586 * quotachecked status, since we won't be doing accounting for
1587 * that type anymore.
1589 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1590 mp->m_qflags |= flags;
1593 while (!list_empty(&buffer_list)) {
1594 struct xfs_buf *bp =
1595 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1596 list_del_init(&bp->b_list);
1602 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1605 * We must turn off quotas.
1607 ASSERT(mp->m_quotainfo != NULL);
1608 xfs_qm_destroy_quotainfo(mp);
1609 if (xfs_mount_reset_sbqflags(mp)) {
1611 "Quotacheck: Failed to reset quota flags.");
1614 xfs_notice(mp, "Quotacheck: Done.");
1619 * This is called after the superblock has been read in and we're ready to
1620 * iget the quota inodes.
1623 xfs_qm_init_quotainos(
1626 struct xfs_inode *uip = NULL;
1627 struct xfs_inode *gip = NULL;
1628 struct xfs_inode *pip = NULL;
1630 __int64_t sbflags = 0;
1633 ASSERT(mp->m_quotainfo);
1636 * Get the uquota and gquota inodes
1638 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1639 if (XFS_IS_UQUOTA_ON(mp) &&
1640 mp->m_sb.sb_uquotino != NULLFSINO) {
1641 ASSERT(mp->m_sb.sb_uquotino > 0);
1642 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1645 return XFS_ERROR(error);
1647 if (XFS_IS_GQUOTA_ON(mp) &&
1648 mp->m_sb.sb_gquotino != NULLFSINO) {
1649 ASSERT(mp->m_sb.sb_gquotino > 0);
1650 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1655 if (XFS_IS_PQUOTA_ON(mp) &&
1656 mp->m_sb.sb_pquotino != NULLFSINO) {
1657 ASSERT(mp->m_sb.sb_pquotino > 0);
1658 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1664 flags |= XFS_QMOPT_SBVERSION;
1665 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1666 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1671 * Create the three inodes, if they don't exist already. The changes
1672 * made above will get added to a transaction and logged in one of
1673 * the qino_alloc calls below. If the device is readonly,
1674 * temporarily switch to read-write to do this.
1676 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1677 error = xfs_qm_qino_alloc(mp, &uip,
1678 sbflags | XFS_SB_UQUOTINO,
1679 flags | XFS_QMOPT_UQUOTA);
1683 flags &= ~XFS_QMOPT_SBVERSION;
1685 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1686 error = xfs_qm_qino_alloc(mp, &gip,
1687 sbflags | XFS_SB_GQUOTINO,
1688 flags | XFS_QMOPT_GQUOTA);
1692 flags &= ~XFS_QMOPT_SBVERSION;
1694 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1695 error = xfs_qm_qino_alloc(mp, &pip,
1696 sbflags | XFS_SB_PQUOTINO,
1697 flags | XFS_QMOPT_PQUOTA);
1702 mp->m_quotainfo->qi_uquotaip = uip;
1703 mp->m_quotainfo->qi_gquotaip = gip;
1704 mp->m_quotainfo->qi_pquotaip = pip;
1715 return XFS_ERROR(error);
1720 struct xfs_dquot *dqp)
1722 struct xfs_mount *mp = dqp->q_mount;
1723 struct xfs_quotainfo *qi = mp->m_quotainfo;
1725 mutex_lock(&qi->qi_tree_lock);
1726 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1727 be32_to_cpu(dqp->q_core.d_id));
1730 mutex_unlock(&qi->qi_tree_lock);
1732 xfs_qm_dqdestroy(dqp);
1736 * Start a transaction and write the incore superblock changes to
1737 * disk. flags parameter indicates which fields have changed.
1740 xfs_qm_write_sb_changes(
1747 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1748 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
1750 xfs_trans_cancel(tp, 0);
1754 xfs_mod_sb(tp, flags);
1755 error = xfs_trans_commit(tp, 0);
1761 /* --------------- utility functions for vnodeops ---------------- */
1765 * Given an inode, a uid, gid and prid make sure that we have
1766 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1767 * quotas by creating this file.
1768 * This also attaches dquot(s) to the given inode after locking it,
1769 * and returns the dquots corresponding to the uid and/or gid.
1771 * in : inode (unlocked)
1772 * out : udquot, gdquot with references taken and unlocked
1776 struct xfs_inode *ip,
1781 struct xfs_dquot **O_udqpp,
1782 struct xfs_dquot **O_gdqpp,
1783 struct xfs_dquot **O_pdqpp)
1785 struct xfs_mount *mp = ip->i_mount;
1786 struct xfs_dquot *uq = NULL;
1787 struct xfs_dquot *gq = NULL;
1788 struct xfs_dquot *pq = NULL;
1792 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1795 lockflags = XFS_ILOCK_EXCL;
1796 xfs_ilock(ip, lockflags);
1798 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1799 gid = ip->i_d.di_gid;
1802 * Attach the dquot(s) to this inode, doing a dquot allocation
1803 * if necessary. The dquot(s) will not be locked.
1805 if (XFS_NOT_DQATTACHED(mp, ip)) {
1806 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1808 xfs_iunlock(ip, lockflags);
1813 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1814 if (ip->i_d.di_uid != uid) {
1816 * What we need is the dquot that has this uid, and
1817 * if we send the inode to dqget, the uid of the inode
1818 * takes priority over what's sent in the uid argument.
1819 * We must unlock inode here before calling dqget if
1820 * we're not sending the inode, because otherwise
1821 * we'll deadlock by doing trans_reserve while
1824 xfs_iunlock(ip, lockflags);
1825 error = xfs_qm_dqget(mp, NULL, uid,
1831 ASSERT(error != ENOENT);
1835 * Get the ilock in the right order.
1838 lockflags = XFS_ILOCK_SHARED;
1839 xfs_ilock(ip, lockflags);
1842 * Take an extra reference, because we'll return
1845 ASSERT(ip->i_udquot);
1846 uq = xfs_qm_dqhold(ip->i_udquot);
1849 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1850 if (ip->i_d.di_gid != gid) {
1851 xfs_iunlock(ip, lockflags);
1852 error = xfs_qm_dqget(mp, NULL, gid,
1858 ASSERT(error != ENOENT);
1862 lockflags = XFS_ILOCK_SHARED;
1863 xfs_ilock(ip, lockflags);
1865 ASSERT(ip->i_gdquot);
1866 gq = xfs_qm_dqhold(ip->i_gdquot);
1869 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1870 if (xfs_get_projid(ip) != prid) {
1871 xfs_iunlock(ip, lockflags);
1872 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1878 ASSERT(error != ENOENT);
1882 lockflags = XFS_ILOCK_SHARED;
1883 xfs_ilock(ip, lockflags);
1885 ASSERT(ip->i_pdquot);
1886 pq = xfs_qm_dqhold(ip->i_pdquot);
1890 trace_xfs_dquot_dqalloc(ip);
1892 xfs_iunlock(ip, lockflags);
1916 * Actually transfer ownership, and do dquot modifications.
1917 * These were already reserved.
1923 xfs_dquot_t **IO_olddq,
1926 xfs_dquot_t *prevdq;
1927 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1928 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1931 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1932 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1937 ASSERT(prevdq != newdq);
1939 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1940 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1942 /* the sparkling new dquot */
1943 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1944 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1947 * Take an extra reference, because the inode is going to keep
1948 * this dquot pointer even after the trans_commit.
1950 *IO_olddq = xfs_qm_dqhold(newdq);
1956 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1959 xfs_qm_vop_chown_reserve(
1960 struct xfs_trans *tp,
1961 struct xfs_inode *ip,
1962 struct xfs_dquot *udqp,
1963 struct xfs_dquot *gdqp,
1964 struct xfs_dquot *pdqp,
1967 struct xfs_mount *mp = ip->i_mount;
1968 uint delblks, blkflags, prjflags = 0;
1969 struct xfs_dquot *udq_unres = NULL;
1970 struct xfs_dquot *gdq_unres = NULL;
1971 struct xfs_dquot *pdq_unres = NULL;
1972 struct xfs_dquot *udq_delblks = NULL;
1973 struct xfs_dquot *gdq_delblks = NULL;
1974 struct xfs_dquot *pdq_delblks = NULL;
1978 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1979 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1981 delblks = ip->i_delayed_blks;
1982 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1983 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1985 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1986 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
1989 * If there are delayed allocation blocks, then we have to
1990 * unreserve those from the old dquot, and add them to the
1994 ASSERT(ip->i_udquot);
1995 udq_unres = ip->i_udquot;
1998 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1999 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
2002 ASSERT(ip->i_gdquot);
2003 gdq_unres = ip->i_gdquot;
2007 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
2008 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
2009 prjflags = XFS_QMOPT_ENOSPC;
2012 ASSERT(ip->i_pdquot);
2013 pdq_unres = ip->i_pdquot;
2017 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2018 udq_delblks, gdq_delblks, pdq_delblks,
2019 ip->i_d.di_nblocks, 1,
2020 flags | blkflags | prjflags);
2025 * Do the delayed blks reservations/unreservations now. Since, these
2026 * are done without the help of a transaction, if a reservation fails
2027 * its previous reservations won't be automatically undone by trans
2028 * code. So, we have to do it manually here.
2032 * Do the reservations first. Unreservation can't fail.
2034 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
2035 ASSERT(udq_unres || gdq_unres || pdq_unres);
2036 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2037 udq_delblks, gdq_delblks, pdq_delblks,
2038 (xfs_qcnt_t)delblks, 0,
2039 flags | blkflags | prjflags);
2042 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2043 udq_unres, gdq_unres, pdq_unres,
2044 -((xfs_qcnt_t)delblks), 0, blkflags);
2051 xfs_qm_vop_rename_dqattach(
2052 struct xfs_inode **i_tab)
2054 struct xfs_mount *mp = i_tab[0]->i_mount;
2057 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2060 for (i = 0; (i < 4 && i_tab[i]); i++) {
2061 struct xfs_inode *ip = i_tab[i];
2065 * Watch out for duplicate entries in the table.
2067 if (i == 0 || ip != i_tab[i-1]) {
2068 if (XFS_NOT_DQATTACHED(mp, ip)) {
2069 error = xfs_qm_dqattach(ip, 0);
2079 xfs_qm_vop_create_dqattach(
2080 struct xfs_trans *tp,
2081 struct xfs_inode *ip,
2082 struct xfs_dquot *udqp,
2083 struct xfs_dquot *gdqp,
2084 struct xfs_dquot *pdqp)
2086 struct xfs_mount *mp = tp->t_mountp;
2088 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2091 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2092 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2095 ASSERT(ip->i_udquot == NULL);
2096 ASSERT(XFS_IS_UQUOTA_ON(mp));
2097 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
2099 ip->i_udquot = xfs_qm_dqhold(udqp);
2100 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2103 ASSERT(ip->i_gdquot == NULL);
2104 ASSERT(XFS_IS_GQUOTA_ON(mp));
2105 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
2106 ip->i_gdquot = xfs_qm_dqhold(gdqp);
2107 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2110 ASSERT(ip->i_pdquot == NULL);
2111 ASSERT(XFS_IS_PQUOTA_ON(mp));
2112 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
2114 ip->i_pdquot = xfs_qm_dqhold(pdqp);
2115 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);