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 * Purge the dquot cache.
200 struct xfs_mount *mp,
203 if (flags & XFS_QMOPT_UQUOTA)
204 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
205 if (flags & XFS_QMOPT_GQUOTA)
206 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
207 if (flags & XFS_QMOPT_PQUOTA)
208 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
212 * Just destroy the quotainfo structure.
216 struct xfs_mount *mp)
218 if (mp->m_quotainfo) {
219 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
220 xfs_qm_destroy_quotainfo(mp);
226 * This is called from xfs_mountfs to start quotas and initialize all
227 * necessary data structures like quotainfo. This is also responsible for
228 * running a quotacheck as necessary. We are guaranteed that the superblock
229 * is consistently read in at this point.
231 * If we fail here, the mount will continue with quota turned off. We don't
232 * need to inidicate success or failure at all.
242 * If quotas on realtime volumes is not supported, we disable
243 * quotas immediately.
245 if (mp->m_sb.sb_rextents) {
246 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
251 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
254 * Allocate the quotainfo structure inside the mount struct, and
255 * create quotainode(s), and change/rev superblock if necessary.
257 error = xfs_qm_init_quotainfo(mp);
260 * We must turn off quotas.
262 ASSERT(mp->m_quotainfo == NULL);
267 * If any of the quotas are not consistent, do a quotacheck.
269 if (XFS_QM_NEED_QUOTACHECK(mp)) {
270 error = xfs_qm_quotacheck(mp);
272 /* Quotacheck failed and disabled quotas. */
277 * If one type of quotas is off, then it will lose its
278 * quotachecked status, since we won't be doing accounting for
281 if (!XFS_IS_UQUOTA_ON(mp))
282 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
283 if (!XFS_IS_GQUOTA_ON(mp))
284 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
285 if (!XFS_IS_PQUOTA_ON(mp))
286 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
290 * We actually don't have to acquire the m_sb_lock at all.
291 * This can only be called from mount, and that's single threaded. XXX
293 spin_lock(&mp->m_sb_lock);
294 sbf = mp->m_sb.sb_qflags;
295 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
296 spin_unlock(&mp->m_sb_lock);
298 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
299 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
301 * We could only have been turning quotas off.
302 * We aren't in very good shape actually because
303 * the incore structures are convinced that quotas are
304 * off, but the on disk superblock doesn't know that !
306 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
307 xfs_alert(mp, "%s: Superblock update failed!",
313 xfs_warn(mp, "Failed to initialize disk quotas.");
319 * Called from the vfsops layer.
322 xfs_qm_unmount_quotas(
326 * Release the dquots that root inode, et al might be holding,
327 * before we flush quotas and blow away the quotainfo structure.
329 ASSERT(mp->m_rootip);
330 xfs_qm_dqdetach(mp->m_rootip);
332 xfs_qm_dqdetach(mp->m_rbmip);
334 xfs_qm_dqdetach(mp->m_rsumip);
337 * Release the quota inodes.
339 if (mp->m_quotainfo) {
340 if (mp->m_quotainfo->qi_uquotaip) {
341 IRELE(mp->m_quotainfo->qi_uquotaip);
342 mp->m_quotainfo->qi_uquotaip = NULL;
344 if (mp->m_quotainfo->qi_gquotaip) {
345 IRELE(mp->m_quotainfo->qi_gquotaip);
346 mp->m_quotainfo->qi_gquotaip = NULL;
348 if (mp->m_quotainfo->qi_pquotaip) {
349 IRELE(mp->m_quotainfo->qi_pquotaip);
350 mp->m_quotainfo->qi_pquotaip = NULL;
361 xfs_dquot_t **IO_idqpp)
366 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
370 * See if we already have it in the inode itself. IO_idqpp is &i_udquot
371 * or &i_gdquot. This made the code look weird, but made the logic a lot
376 trace_xfs_dqattach_found(dqp);
381 * Find the dquot from somewhere. This bumps the reference count of
382 * dquot and returns it locked. This can return ENOENT if dquot didn't
383 * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
384 * turned off suddenly.
386 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
387 doalloc | XFS_QMOPT_DOWARN, &dqp);
391 trace_xfs_dqattach_get(dqp);
394 * dqget may have dropped and re-acquired the ilock, but it guarantees
395 * that the dquot returned is the one that should go in the inode.
403 xfs_qm_need_dqattach(
404 struct xfs_inode *ip)
406 struct xfs_mount *mp = ip->i_mount;
408 if (!XFS_IS_QUOTA_RUNNING(mp))
410 if (!XFS_IS_QUOTA_ON(mp))
412 if (!XFS_NOT_DQATTACHED(mp, ip))
414 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
420 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
422 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
423 * Inode may get unlocked and relocked in here, and the caller must deal with
427 xfs_qm_dqattach_locked(
431 xfs_mount_t *mp = ip->i_mount;
434 if (!xfs_qm_need_dqattach(ip))
437 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
439 if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
440 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
441 flags & XFS_QMOPT_DQALLOC,
445 ASSERT(ip->i_udquot);
448 if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
449 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
450 flags & XFS_QMOPT_DQALLOC,
454 ASSERT(ip->i_gdquot);
457 if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
458 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
459 flags & XFS_QMOPT_DQALLOC,
463 ASSERT(ip->i_pdquot);
468 * Don't worry about the dquots that we may have attached before any
469 * error - they'll get detached later if it has not already been done.
471 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
477 struct xfs_inode *ip,
482 if (!xfs_qm_need_dqattach(ip))
485 xfs_ilock(ip, XFS_ILOCK_EXCL);
486 error = xfs_qm_dqattach_locked(ip, flags);
487 xfs_iunlock(ip, XFS_ILOCK_EXCL);
493 * Release dquots (and their references) if any.
494 * The inode should be locked EXCL except when this's called by
501 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
504 trace_xfs_dquot_dqdetach(ip);
506 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
508 xfs_qm_dqrele(ip->i_udquot);
512 xfs_qm_dqrele(ip->i_gdquot);
516 xfs_qm_dqrele(ip->i_pdquot);
521 struct xfs_qm_isolate {
522 struct list_head buffers;
523 struct list_head dispose;
526 static enum lru_status
527 xfs_qm_dquot_isolate(
528 struct list_head *item,
529 spinlock_t *lru_lock,
532 struct xfs_dquot *dqp = container_of(item,
533 struct xfs_dquot, q_lru);
534 struct xfs_qm_isolate *isol = arg;
536 if (!xfs_dqlock_nowait(dqp))
540 * This dquot has acquired a reference in the meantime remove it from
541 * the freelist and try again.
545 XFS_STATS_INC(xs_qm_dqwants);
547 trace_xfs_dqreclaim_want(dqp);
548 list_del_init(&dqp->q_lru);
549 XFS_STATS_DEC(xs_qm_dquot_unused);
554 * If the dquot is dirty, flush it. If it's already being flushed, just
555 * skip it so there is time for the IO to complete before we try to
556 * reclaim it again on the next LRU pass.
558 if (!xfs_dqflock_nowait(dqp)) {
563 if (XFS_DQ_IS_DIRTY(dqp)) {
564 struct xfs_buf *bp = NULL;
567 trace_xfs_dqreclaim_dirty(dqp);
569 /* we have to drop the LRU lock to flush the dquot */
570 spin_unlock(lru_lock);
572 error = xfs_qm_dqflush(dqp, &bp);
574 xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
576 goto out_unlock_dirty;
579 xfs_buf_delwri_queue(bp, &isol->buffers);
581 goto out_unlock_dirty;
586 * Prevent lookups now that we are past the point of no return.
588 dqp->dq_flags |= XFS_DQ_FREEING;
591 ASSERT(dqp->q_nrefs == 0);
592 list_move_tail(&dqp->q_lru, &isol->dispose);
593 XFS_STATS_DEC(xs_qm_dquot_unused);
594 trace_xfs_dqreclaim_done(dqp);
595 XFS_STATS_INC(xs_qm_dqreclaims);
599 trace_xfs_dqreclaim_busy(dqp);
600 XFS_STATS_INC(xs_qm_dqreclaim_misses);
604 trace_xfs_dqreclaim_busy(dqp);
605 XFS_STATS_INC(xs_qm_dqreclaim_misses);
613 struct shrinker *shrink,
614 struct shrink_control *sc)
616 struct xfs_quotainfo *qi = container_of(shrink,
617 struct xfs_quotainfo, qi_shrinker);
618 struct xfs_qm_isolate isol;
621 unsigned long nr_to_scan = sc->nr_to_scan;
623 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
626 INIT_LIST_HEAD(&isol.buffers);
627 INIT_LIST_HEAD(&isol.dispose);
629 freed = list_lru_walk_node(&qi->qi_lru, sc->nid, xfs_qm_dquot_isolate, &isol,
632 error = xfs_buf_delwri_submit(&isol.buffers);
634 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
636 while (!list_empty(&isol.dispose)) {
637 struct xfs_dquot *dqp;
639 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
640 list_del_init(&dqp->q_lru);
641 xfs_qm_dqfree_one(dqp);
649 struct shrinker *shrink,
650 struct shrink_control *sc)
652 struct xfs_quotainfo *qi = container_of(shrink,
653 struct xfs_quotainfo, qi_shrinker);
655 return list_lru_count_node(&qi->qi_lru, sc->nid);
659 * This initializes all the quota information that's kept in the
663 xfs_qm_init_quotainfo(
666 xfs_quotainfo_t *qinf;
670 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
672 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
674 error = -list_lru_init(&qinf->qi_lru);
679 * See if quotainodes are setup, and if not, allocate them,
680 * and change the superblock accordingly.
682 error = xfs_qm_init_quotainos(mp);
686 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
687 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
688 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
689 mutex_init(&qinf->qi_tree_lock);
691 /* mutex used to serialize quotaoffs */
692 mutex_init(&qinf->qi_quotaofflock);
694 /* Precalc some constants */
695 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
696 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
698 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
701 * We try to get the limits from the superuser's limits fields.
702 * This is quite hacky, but it is standard quota practice.
704 * We look at the USR dquot with id == 0 first, but if user quotas
705 * are not enabled we goto the GRP dquot with id == 0.
706 * We don't really care to keep separate default limits for user
707 * and group quotas, at least not at this point.
709 * Since we may not have done a quotacheck by this point, just read
710 * the dquot without attaching it to any hashtables or lists.
712 error = xfs_qm_dqread(mp, 0,
713 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
714 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
716 XFS_QMOPT_DOWARN, &dqp);
718 xfs_disk_dquot_t *ddqp = &dqp->q_core;
721 * The warnings and timers set the grace period given to
722 * a user or group before he or she can not perform any
723 * more writing. If it is zero, a default is used.
725 qinf->qi_btimelimit = ddqp->d_btimer ?
726 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
727 qinf->qi_itimelimit = ddqp->d_itimer ?
728 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
729 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
730 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
731 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
732 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
733 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
734 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
735 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
736 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
737 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
738 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
739 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
740 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
741 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
742 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
744 xfs_qm_dqdestroy(dqp);
746 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
747 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
748 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
749 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
750 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
751 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
754 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
755 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
756 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
757 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
758 register_shrinker(&qinf->qi_shrinker);
762 list_lru_destroy(&qinf->qi_lru);
765 mp->m_quotainfo = NULL;
771 * Gets called when unmounting a filesystem or when all quotas get
773 * This purges the quota inodes, destroys locks and frees itself.
776 xfs_qm_destroy_quotainfo(
781 qi = mp->m_quotainfo;
784 unregister_shrinker(&qi->qi_shrinker);
785 list_lru_destroy(&qi->qi_lru);
787 if (qi->qi_uquotaip) {
788 IRELE(qi->qi_uquotaip);
789 qi->qi_uquotaip = NULL; /* paranoia */
791 if (qi->qi_gquotaip) {
792 IRELE(qi->qi_gquotaip);
793 qi->qi_gquotaip = NULL;
795 if (qi->qi_pquotaip) {
796 IRELE(qi->qi_pquotaip);
797 qi->qi_pquotaip = NULL;
799 mutex_destroy(&qi->qi_quotaofflock);
801 mp->m_quotainfo = NULL;
805 * Create an inode and return with a reference already taken, but unlocked
806 * This is how we create quota inodes
821 * With superblock that doesn't have separate pquotino, we
822 * share an inode between gquota and pquota. If the on-disk
823 * superblock has GQUOTA and the filesystem is now mounted
824 * with PQUOTA, just use sb_gquotino for sb_pquotino and
827 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
828 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
829 xfs_ino_t ino = NULLFSINO;
831 if ((flags & XFS_QMOPT_PQUOTA) &&
832 (mp->m_sb.sb_gquotino != NULLFSINO)) {
833 ino = mp->m_sb.sb_gquotino;
834 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
835 } else if ((flags & XFS_QMOPT_GQUOTA) &&
836 (mp->m_sb.sb_pquotino != NULLFSINO)) {
837 ino = mp->m_sb.sb_pquotino;
838 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
840 if (ino != NULLFSINO) {
841 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
844 mp->m_sb.sb_gquotino = NULLFSINO;
845 mp->m_sb.sb_pquotino = NULLFSINO;
849 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
850 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create,
851 XFS_QM_QINOCREATE_SPACE_RES(mp), 0);
853 xfs_trans_cancel(tp, 0);
858 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
861 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
868 * Make the changes in the superblock, and log those too.
869 * sbfields arg may contain fields other than *QUOTINO;
870 * VERSIONNUM for example.
872 spin_lock(&mp->m_sb_lock);
873 if (flags & XFS_QMOPT_SBVERSION) {
874 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
875 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
876 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS)) ==
877 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
878 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
881 xfs_sb_version_addquota(&mp->m_sb);
882 mp->m_sb.sb_uquotino = NULLFSINO;
883 mp->m_sb.sb_gquotino = NULLFSINO;
884 mp->m_sb.sb_pquotino = NULLFSINO;
886 /* qflags will get updated fully _after_ quotacheck */
887 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
889 if (flags & XFS_QMOPT_UQUOTA)
890 mp->m_sb.sb_uquotino = (*ip)->i_ino;
891 else if (flags & XFS_QMOPT_GQUOTA)
892 mp->m_sb.sb_gquotino = (*ip)->i_ino;
894 mp->m_sb.sb_pquotino = (*ip)->i_ino;
895 spin_unlock(&mp->m_sb_lock);
896 xfs_mod_sb(tp, sbfields);
898 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
899 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
907 xfs_qm_reset_dqcounts(
913 struct xfs_dqblk *dqb;
916 trace_xfs_reset_dqcounts(bp, _RET_IP_);
919 * Reset all counters and timers. They'll be
920 * started afresh by xfs_qm_quotacheck.
923 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
924 do_div(j, sizeof(xfs_dqblk_t));
925 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
928 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
929 struct xfs_disk_dquot *ddq;
931 ddq = (struct xfs_disk_dquot *)&dqb[j];
934 * Do a sanity check, and if needed, repair the dqblk. Don't
935 * output any warnings because it's perfectly possible to
936 * find uninitialised dquot blks. See comment in xfs_dqcheck.
938 xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
950 if (xfs_sb_version_hascrc(&mp->m_sb)) {
951 xfs_update_cksum((char *)&dqb[j],
952 sizeof(struct xfs_dqblk),
960 struct xfs_mount *mp,
963 xfs_filblks_t blkcnt,
965 struct list_head *buffer_list)
972 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
973 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
977 * Blkcnt arg can be a very big number, and might even be
978 * larger than the log itself. So, we have to break it up into
979 * manageable-sized transactions.
980 * Note that we don't start a permanent transaction here; we might
981 * not be able to get a log reservation for the whole thing up front,
982 * and we don't really care to either, because we just discard
983 * everything if we were to crash in the middle of this loop.
986 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
987 XFS_FSB_TO_DADDR(mp, bno),
988 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
992 * CRC and validation errors will return a EFSCORRUPTED here. If
993 * this occurs, re-read without CRC validation so that we can
994 * repair the damage via xfs_qm_reset_dqcounts(). This process
995 * will leave a trace in the log indicating corruption has
998 if (error == EFSCORRUPTED) {
999 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1000 XFS_FSB_TO_DADDR(mp, bno),
1001 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1008 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1009 xfs_buf_delwri_queue(bp, buffer_list);
1012 /* goto the next block. */
1014 firstid += mp->m_quotainfo->qi_dqperchunk;
1021 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1022 * caller supplied function for every chunk of dquots that we find.
1026 struct xfs_mount *mp,
1027 struct xfs_inode *qip,
1029 struct list_head *buffer_list)
1031 struct xfs_bmbt_irec *map;
1032 int i, nmaps; /* number of map entries */
1033 int error; /* return value */
1034 xfs_fileoff_t lblkno;
1035 xfs_filblks_t maxlblkcnt;
1037 xfs_fsblock_t rablkno;
1038 xfs_filblks_t rablkcnt;
1042 * This looks racy, but we can't keep an inode lock across a
1043 * trans_reserve. But, this gets called during quotacheck, and that
1044 * happens only at mount time which is single threaded.
1046 if (qip->i_d.di_nblocks == 0)
1049 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1052 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
1056 nmaps = XFS_DQITER_MAP_SIZE;
1058 * We aren't changing the inode itself. Just changing
1059 * some of its data. No new blocks are added here, and
1060 * the inode is never added to the transaction.
1062 lock_mode = xfs_ilock_data_map_shared(qip);
1063 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1065 xfs_iunlock(qip, lock_mode);
1069 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1070 for (i = 0; i < nmaps; i++) {
1071 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1072 ASSERT(map[i].br_blockcount);
1075 lblkno += map[i].br_blockcount;
1077 if (map[i].br_startblock == HOLESTARTBLOCK)
1080 firstid = (xfs_dqid_t) map[i].br_startoff *
1081 mp->m_quotainfo->qi_dqperchunk;
1083 * Do a read-ahead on the next extent.
1085 if ((i+1 < nmaps) &&
1086 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1087 rablkcnt = map[i+1].br_blockcount;
1088 rablkno = map[i+1].br_startblock;
1089 while (rablkcnt--) {
1090 xfs_buf_readahead(mp->m_ddev_targp,
1091 XFS_FSB_TO_DADDR(mp, rablkno),
1092 mp->m_quotainfo->qi_dqchunklen,
1098 * Iterate thru all the blks in the extent and
1099 * reset the counters of all the dquots inside them.
1101 error = xfs_qm_dqiter_bufs(mp, firstid,
1102 map[i].br_startblock,
1103 map[i].br_blockcount,
1104 flags, buffer_list);
1108 } while (nmaps > 0);
1116 * Called by dqusage_adjust in doing a quotacheck.
1118 * Given the inode, and a dquot id this updates both the incore dqout as well
1119 * as the buffer copy. This is so that once the quotacheck is done, we can
1120 * just log all the buffers, as opposed to logging numerous updates to
1121 * individual dquots.
1124 xfs_qm_quotacheck_dqadjust(
1125 struct xfs_inode *ip,
1131 struct xfs_mount *mp = ip->i_mount;
1132 struct xfs_dquot *dqp;
1135 error = xfs_qm_dqget(mp, ip, id, type,
1136 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1139 * Shouldn't be able to turn off quotas here.
1141 ASSERT(error != ESRCH);
1142 ASSERT(error != ENOENT);
1146 trace_xfs_dqadjust(dqp);
1149 * Adjust the inode count and the block count to reflect this inode's
1152 be64_add_cpu(&dqp->q_core.d_icount, 1);
1153 dqp->q_res_icount++;
1155 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1156 dqp->q_res_bcount += nblks;
1159 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1160 dqp->q_res_rtbcount += rtblks;
1164 * Set default limits, adjust timers (since we changed usages)
1166 * There are no timers for the default values set in the root dquot.
1168 if (dqp->q_core.d_id) {
1169 xfs_qm_adjust_dqlimits(mp, dqp);
1170 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1173 dqp->dq_flags |= XFS_DQ_DIRTY;
1181 xfs_qcnt_t *O_rtblks)
1183 xfs_filblks_t rtblks; /* total rt blks */
1184 xfs_extnum_t idx; /* extent record index */
1185 xfs_ifork_t *ifp; /* inode fork pointer */
1186 xfs_extnum_t nextents; /* number of extent entries */
1189 ASSERT(XFS_IS_REALTIME_INODE(ip));
1190 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1191 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1192 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1196 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1197 for (idx = 0; idx < nextents; idx++)
1198 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1199 *O_rtblks = (xfs_qcnt_t)rtblks;
1204 * callback routine supplied to bulkstat(). Given an inumber, find its
1205 * dquots and update them to account for resources taken by that inode.
1209 xfs_qm_dqusage_adjust(
1210 xfs_mount_t *mp, /* mount point for filesystem */
1211 xfs_ino_t ino, /* inode number to get data for */
1212 void __user *buffer, /* not used */
1213 int ubsize, /* not used */
1214 int *ubused, /* not used */
1215 int *res) /* result code value */
1218 xfs_qcnt_t nblks, rtblks = 0;
1221 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1224 * rootino must have its resources accounted for, not so with the quota
1227 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1228 *res = BULKSTAT_RV_NOTHING;
1229 return XFS_ERROR(EINVAL);
1233 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1234 * interface expects the inode to be exclusively locked because that's
1235 * the case in all other instances. It's OK that we do this because
1236 * quotacheck is done only at mount time.
1238 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1240 *res = BULKSTAT_RV_NOTHING;
1244 ASSERT(ip->i_delayed_blks == 0);
1246 if (XFS_IS_REALTIME_INODE(ip)) {
1248 * Walk thru the extent list and count the realtime blocks.
1250 error = xfs_qm_get_rtblks(ip, &rtblks);
1255 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1258 * Add the (disk blocks and inode) resources occupied by this
1259 * inode to its dquots. We do this adjustment in the incore dquot,
1260 * and also copy the changes to its buffer.
1261 * We don't care about putting these changes in a transaction
1262 * envelope because if we crash in the middle of a 'quotacheck'
1263 * we have to start from the beginning anyway.
1264 * Once we're done, we'll log all the dquot bufs.
1266 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1267 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1269 if (XFS_IS_UQUOTA_ON(mp)) {
1270 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1271 XFS_DQ_USER, nblks, rtblks);
1276 if (XFS_IS_GQUOTA_ON(mp)) {
1277 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1278 XFS_DQ_GROUP, nblks, rtblks);
1283 if (XFS_IS_PQUOTA_ON(mp)) {
1284 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1285 XFS_DQ_PROJ, nblks, rtblks);
1290 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1292 *res = BULKSTAT_RV_DIDONE;
1296 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1298 *res = BULKSTAT_RV_GIVEUP;
1304 struct xfs_dquot *dqp,
1307 struct list_head *buffer_list = data;
1308 struct xfs_buf *bp = NULL;
1312 if (dqp->dq_flags & XFS_DQ_FREEING)
1314 if (!XFS_DQ_IS_DIRTY(dqp))
1318 error = xfs_qm_dqflush(dqp, &bp);
1322 xfs_buf_delwri_queue(bp, buffer_list);
1330 * Walk thru all the filesystem inodes and construct a consistent view
1331 * of the disk quota world. If the quotacheck fails, disable quotas.
1337 int done, count, error, error2;
1341 LIST_HEAD (buffer_list);
1342 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1343 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1344 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1351 ASSERT(uip || gip || pip);
1352 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1354 xfs_notice(mp, "Quotacheck needed: Please wait.");
1357 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1358 * their counters to zero. We need a clean slate.
1359 * We don't log our changes till later.
1362 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1366 flags |= XFS_UQUOTA_CHKD;
1370 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1374 flags |= XFS_GQUOTA_CHKD;
1378 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1382 flags |= XFS_PQUOTA_CHKD;
1387 * Iterate thru all the inodes in the file system,
1388 * adjusting the corresponding dquot counters in core.
1390 error = xfs_bulkstat(mp, &lastino, &count,
1391 xfs_qm_dqusage_adjust,
1392 structsz, NULL, &done);
1399 * We've made all the changes that we need to make incore. Flush them
1400 * down to disk buffers if everything was updated successfully.
1402 if (XFS_IS_UQUOTA_ON(mp)) {
1403 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1406 if (XFS_IS_GQUOTA_ON(mp)) {
1407 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1412 if (XFS_IS_PQUOTA_ON(mp)) {
1413 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1419 error2 = xfs_buf_delwri_submit(&buffer_list);
1424 * We can get this error if we couldn't do a dquot allocation inside
1425 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1426 * dirty dquots that might be cached, we just want to get rid of them
1427 * and turn quotaoff. The dquots won't be attached to any of the inodes
1428 * at this point (because we intentionally didn't in dqget_noattach).
1431 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1436 * If one type of quotas is off, then it will lose its
1437 * quotachecked status, since we won't be doing accounting for
1438 * that type anymore.
1440 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1441 mp->m_qflags |= flags;
1444 while (!list_empty(&buffer_list)) {
1445 struct xfs_buf *bp =
1446 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1447 list_del_init(&bp->b_list);
1453 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1456 * We must turn off quotas.
1458 ASSERT(mp->m_quotainfo != NULL);
1459 xfs_qm_destroy_quotainfo(mp);
1460 if (xfs_mount_reset_sbqflags(mp)) {
1462 "Quotacheck: Failed to reset quota flags.");
1465 xfs_notice(mp, "Quotacheck: Done.");
1470 * This is called after the superblock has been read in and we're ready to
1471 * iget the quota inodes.
1474 xfs_qm_init_quotainos(
1477 struct xfs_inode *uip = NULL;
1478 struct xfs_inode *gip = NULL;
1479 struct xfs_inode *pip = NULL;
1481 __int64_t sbflags = 0;
1484 ASSERT(mp->m_quotainfo);
1487 * Get the uquota and gquota inodes
1489 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1490 if (XFS_IS_UQUOTA_ON(mp) &&
1491 mp->m_sb.sb_uquotino != NULLFSINO) {
1492 ASSERT(mp->m_sb.sb_uquotino > 0);
1493 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1496 return XFS_ERROR(error);
1498 if (XFS_IS_GQUOTA_ON(mp) &&
1499 mp->m_sb.sb_gquotino != NULLFSINO) {
1500 ASSERT(mp->m_sb.sb_gquotino > 0);
1501 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1506 if (XFS_IS_PQUOTA_ON(mp) &&
1507 mp->m_sb.sb_pquotino != NULLFSINO) {
1508 ASSERT(mp->m_sb.sb_pquotino > 0);
1509 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1515 flags |= XFS_QMOPT_SBVERSION;
1516 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1517 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1522 * Create the three inodes, if they don't exist already. The changes
1523 * made above will get added to a transaction and logged in one of
1524 * the qino_alloc calls below. If the device is readonly,
1525 * temporarily switch to read-write to do this.
1527 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1528 error = xfs_qm_qino_alloc(mp, &uip,
1529 sbflags | XFS_SB_UQUOTINO,
1530 flags | XFS_QMOPT_UQUOTA);
1534 flags &= ~XFS_QMOPT_SBVERSION;
1536 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1537 error = xfs_qm_qino_alloc(mp, &gip,
1538 sbflags | XFS_SB_GQUOTINO,
1539 flags | XFS_QMOPT_GQUOTA);
1543 flags &= ~XFS_QMOPT_SBVERSION;
1545 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1546 error = xfs_qm_qino_alloc(mp, &pip,
1547 sbflags | XFS_SB_PQUOTINO,
1548 flags | XFS_QMOPT_PQUOTA);
1553 mp->m_quotainfo->qi_uquotaip = uip;
1554 mp->m_quotainfo->qi_gquotaip = gip;
1555 mp->m_quotainfo->qi_pquotaip = pip;
1566 return XFS_ERROR(error);
1571 struct xfs_dquot *dqp)
1573 struct xfs_mount *mp = dqp->q_mount;
1574 struct xfs_quotainfo *qi = mp->m_quotainfo;
1576 mutex_lock(&qi->qi_tree_lock);
1577 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1578 be32_to_cpu(dqp->q_core.d_id));
1581 mutex_unlock(&qi->qi_tree_lock);
1583 xfs_qm_dqdestroy(dqp);
1587 * Start a transaction and write the incore superblock changes to
1588 * disk. flags parameter indicates which fields have changed.
1591 xfs_qm_write_sb_changes(
1598 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1599 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
1601 xfs_trans_cancel(tp, 0);
1605 xfs_mod_sb(tp, flags);
1606 error = xfs_trans_commit(tp, 0);
1612 /* --------------- utility functions for vnodeops ---------------- */
1616 * Given an inode, a uid, gid and prid make sure that we have
1617 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1618 * quotas by creating this file.
1619 * This also attaches dquot(s) to the given inode after locking it,
1620 * and returns the dquots corresponding to the uid and/or gid.
1622 * in : inode (unlocked)
1623 * out : udquot, gdquot with references taken and unlocked
1627 struct xfs_inode *ip,
1632 struct xfs_dquot **O_udqpp,
1633 struct xfs_dquot **O_gdqpp,
1634 struct xfs_dquot **O_pdqpp)
1636 struct xfs_mount *mp = ip->i_mount;
1637 struct xfs_dquot *uq = NULL;
1638 struct xfs_dquot *gq = NULL;
1639 struct xfs_dquot *pq = NULL;
1643 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1646 lockflags = XFS_ILOCK_EXCL;
1647 xfs_ilock(ip, lockflags);
1649 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1650 gid = ip->i_d.di_gid;
1653 * Attach the dquot(s) to this inode, doing a dquot allocation
1654 * if necessary. The dquot(s) will not be locked.
1656 if (XFS_NOT_DQATTACHED(mp, ip)) {
1657 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1659 xfs_iunlock(ip, lockflags);
1664 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1665 if (ip->i_d.di_uid != uid) {
1667 * What we need is the dquot that has this uid, and
1668 * if we send the inode to dqget, the uid of the inode
1669 * takes priority over what's sent in the uid argument.
1670 * We must unlock inode here before calling dqget if
1671 * we're not sending the inode, because otherwise
1672 * we'll deadlock by doing trans_reserve while
1675 xfs_iunlock(ip, lockflags);
1676 error = xfs_qm_dqget(mp, NULL, uid,
1682 ASSERT(error != ENOENT);
1686 * Get the ilock in the right order.
1689 lockflags = XFS_ILOCK_SHARED;
1690 xfs_ilock(ip, lockflags);
1693 * Take an extra reference, because we'll return
1696 ASSERT(ip->i_udquot);
1697 uq = xfs_qm_dqhold(ip->i_udquot);
1700 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1701 if (ip->i_d.di_gid != gid) {
1702 xfs_iunlock(ip, lockflags);
1703 error = xfs_qm_dqget(mp, NULL, gid,
1709 ASSERT(error != ENOENT);
1713 lockflags = XFS_ILOCK_SHARED;
1714 xfs_ilock(ip, lockflags);
1716 ASSERT(ip->i_gdquot);
1717 gq = xfs_qm_dqhold(ip->i_gdquot);
1720 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1721 if (xfs_get_projid(ip) != prid) {
1722 xfs_iunlock(ip, lockflags);
1723 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1729 ASSERT(error != ENOENT);
1733 lockflags = XFS_ILOCK_SHARED;
1734 xfs_ilock(ip, lockflags);
1736 ASSERT(ip->i_pdquot);
1737 pq = xfs_qm_dqhold(ip->i_pdquot);
1741 trace_xfs_dquot_dqalloc(ip);
1743 xfs_iunlock(ip, lockflags);
1767 * Actually transfer ownership, and do dquot modifications.
1768 * These were already reserved.
1774 xfs_dquot_t **IO_olddq,
1777 xfs_dquot_t *prevdq;
1778 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1779 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1782 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1783 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1788 ASSERT(prevdq != newdq);
1790 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1791 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1793 /* the sparkling new dquot */
1794 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1795 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1798 * Take an extra reference, because the inode is going to keep
1799 * this dquot pointer even after the trans_commit.
1801 *IO_olddq = xfs_qm_dqhold(newdq);
1807 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1810 xfs_qm_vop_chown_reserve(
1811 struct xfs_trans *tp,
1812 struct xfs_inode *ip,
1813 struct xfs_dquot *udqp,
1814 struct xfs_dquot *gdqp,
1815 struct xfs_dquot *pdqp,
1818 struct xfs_mount *mp = ip->i_mount;
1819 uint delblks, blkflags, prjflags = 0;
1820 struct xfs_dquot *udq_unres = NULL;
1821 struct xfs_dquot *gdq_unres = NULL;
1822 struct xfs_dquot *pdq_unres = NULL;
1823 struct xfs_dquot *udq_delblks = NULL;
1824 struct xfs_dquot *gdq_delblks = NULL;
1825 struct xfs_dquot *pdq_delblks = NULL;
1829 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1830 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1832 delblks = ip->i_delayed_blks;
1833 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1834 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1836 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1837 ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
1840 * If there are delayed allocation blocks, then we have to
1841 * unreserve those from the old dquot, and add them to the
1845 ASSERT(ip->i_udquot);
1846 udq_unres = ip->i_udquot;
1849 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1850 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1853 ASSERT(ip->i_gdquot);
1854 gdq_unres = ip->i_gdquot;
1858 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1859 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
1860 prjflags = XFS_QMOPT_ENOSPC;
1863 ASSERT(ip->i_pdquot);
1864 pdq_unres = ip->i_pdquot;
1868 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1869 udq_delblks, gdq_delblks, pdq_delblks,
1870 ip->i_d.di_nblocks, 1,
1871 flags | blkflags | prjflags);
1876 * Do the delayed blks reservations/unreservations now. Since, these
1877 * are done without the help of a transaction, if a reservation fails
1878 * its previous reservations won't be automatically undone by trans
1879 * code. So, we have to do it manually here.
1883 * Do the reservations first. Unreservation can't fail.
1885 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
1886 ASSERT(udq_unres || gdq_unres || pdq_unres);
1887 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1888 udq_delblks, gdq_delblks, pdq_delblks,
1889 (xfs_qcnt_t)delblks, 0,
1890 flags | blkflags | prjflags);
1893 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1894 udq_unres, gdq_unres, pdq_unres,
1895 -((xfs_qcnt_t)delblks), 0, blkflags);
1902 xfs_qm_vop_rename_dqattach(
1903 struct xfs_inode **i_tab)
1905 struct xfs_mount *mp = i_tab[0]->i_mount;
1908 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1911 for (i = 0; (i < 4 && i_tab[i]); i++) {
1912 struct xfs_inode *ip = i_tab[i];
1916 * Watch out for duplicate entries in the table.
1918 if (i == 0 || ip != i_tab[i-1]) {
1919 if (XFS_NOT_DQATTACHED(mp, ip)) {
1920 error = xfs_qm_dqattach(ip, 0);
1930 xfs_qm_vop_create_dqattach(
1931 struct xfs_trans *tp,
1932 struct xfs_inode *ip,
1933 struct xfs_dquot *udqp,
1934 struct xfs_dquot *gdqp,
1935 struct xfs_dquot *pdqp)
1937 struct xfs_mount *mp = tp->t_mountp;
1939 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1942 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1943 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1945 if (udqp && XFS_IS_UQUOTA_ON(mp)) {
1946 ASSERT(ip->i_udquot == NULL);
1947 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
1949 ip->i_udquot = xfs_qm_dqhold(udqp);
1950 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1952 if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
1953 ASSERT(ip->i_gdquot == NULL);
1954 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
1955 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1956 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1958 if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
1959 ASSERT(ip->i_pdquot == NULL);
1960 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
1962 ip->i_pdquot = xfs_qm_dqhold(pdqp);
1963 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);