1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
14 #include "xfs_mount.h"
15 #include "xfs_inode.h"
16 #include "xfs_iwalk.h"
17 #include "xfs_quota.h"
19 #include "xfs_bmap_util.h"
20 #include "xfs_trans.h"
21 #include "xfs_trans_space.h"
23 #include "xfs_trace.h"
24 #include "xfs_icache.h"
25 #include "xfs_error.h"
27 #include "xfs_ialloc.h"
28 #include "xfs_log_priv.h"
31 * The global quota manager. There is only one of these for the entire
32 * system, _not_ one per file system. XQM keeps track of the overall
33 * quota functionality, including maintaining the freelist and hash
36 STATIC int xfs_qm_init_quotainos(struct xfs_mount *mp);
37 STATIC int xfs_qm_init_quotainfo(struct xfs_mount *mp);
39 STATIC void xfs_qm_destroy_quotainos(struct xfs_quotainfo *qi);
40 STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
42 * We use the batch lookup interface to iterate over the dquots as it
43 * currently is the only interface into the radix tree code that allows
44 * fuzzy lookups instead of exact matches. Holding the lock over multiple
45 * operations is fine as all callers are used either during mount/umount
48 #define XFS_DQ_LOOKUP_BATCH 32
54 int (*execute)(struct xfs_dquot *dqp, void *data),
57 struct xfs_quotainfo *qi = mp->m_quotainfo;
58 struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
70 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
74 mutex_lock(&qi->qi_tree_lock);
75 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
76 next_index, XFS_DQ_LOOKUP_BATCH);
78 mutex_unlock(&qi->qi_tree_lock);
82 for (i = 0; i < nr_found; i++) {
83 struct xfs_dquot *dqp = batch[i];
85 next_index = dqp->q_id + 1;
87 error = execute(batch[i], data);
88 if (error == -EAGAIN) {
92 if (error && last_error != -EFSCORRUPTED)
96 mutex_unlock(&qi->qi_tree_lock);
98 /* bail out if the filesystem is corrupted. */
99 if (last_error == -EFSCORRUPTED) {
103 /* we're done if id overflows back to zero */
118 * Purge a dquot from all tracking data structures and free it.
122 struct xfs_dquot *dqp,
125 struct xfs_quotainfo *qi = dqp->q_mount->m_quotainfo;
129 if ((dqp->q_flags & XFS_DQFLAG_FREEING) || dqp->q_nrefs != 0)
132 dqp->q_flags |= XFS_DQFLAG_FREEING;
137 * If we are turning this type of quotas off, we don't care
138 * about the dirty metadata sitting in this dquot. OTOH, if
139 * we're unmounting, we do care, so we flush it and wait.
141 if (XFS_DQ_IS_DIRTY(dqp)) {
142 struct xfs_buf *bp = NULL;
145 * We don't care about getting disk errors here. We need
146 * to purge this dquot anyway, so we go ahead regardless.
148 error = xfs_qm_dqflush(dqp, &bp);
150 error = xfs_bwrite(bp);
152 } else if (error == -EAGAIN) {
153 dqp->q_flags &= ~XFS_DQFLAG_FREEING;
159 ASSERT(atomic_read(&dqp->q_pincount) == 0);
160 ASSERT(xlog_is_shutdown(dqp->q_logitem.qli_item.li_log) ||
161 !test_bit(XFS_LI_IN_AIL, &dqp->q_logitem.qli_item.li_flags));
166 radix_tree_delete(xfs_dquot_tree(qi, xfs_dquot_type(dqp)), dqp->q_id);
170 * We move dquots to the freelist as soon as their reference count
171 * hits zero, so it really should be on the freelist here.
173 ASSERT(!list_empty(&dqp->q_lru));
174 list_lru_del(&qi->qi_lru, &dqp->q_lru);
175 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
177 xfs_qm_dqdestroy(dqp);
186 * Purge the dquot cache.
190 struct xfs_mount *mp)
192 xfs_qm_dquot_walk(mp, XFS_DQTYPE_USER, xfs_qm_dqpurge, NULL);
193 xfs_qm_dquot_walk(mp, XFS_DQTYPE_GROUP, xfs_qm_dqpurge, NULL);
194 xfs_qm_dquot_walk(mp, XFS_DQTYPE_PROJ, xfs_qm_dqpurge, NULL);
198 * Just destroy the quotainfo structure.
202 struct xfs_mount *mp)
204 if (mp->m_quotainfo) {
205 xfs_qm_dqpurge_all(mp);
206 xfs_qm_destroy_quotainfo(mp);
211 * Called from the vfsops layer.
214 xfs_qm_unmount_quotas(
218 * Release the dquots that root inode, et al might be holding,
219 * before we flush quotas and blow away the quotainfo structure.
221 ASSERT(mp->m_rootip);
222 xfs_qm_dqdetach(mp->m_rootip);
224 xfs_qm_dqdetach(mp->m_rbmip);
226 xfs_qm_dqdetach(mp->m_rsumip);
229 * Release the quota inodes.
231 if (mp->m_quotainfo) {
232 if (mp->m_quotainfo->qi_uquotaip) {
233 xfs_irele(mp->m_quotainfo->qi_uquotaip);
234 mp->m_quotainfo->qi_uquotaip = NULL;
236 if (mp->m_quotainfo->qi_gquotaip) {
237 xfs_irele(mp->m_quotainfo->qi_gquotaip);
238 mp->m_quotainfo->qi_gquotaip = NULL;
240 if (mp->m_quotainfo->qi_pquotaip) {
241 xfs_irele(mp->m_quotainfo->qi_pquotaip);
242 mp->m_quotainfo->qi_pquotaip = NULL;
249 struct xfs_inode *ip,
252 struct xfs_dquot **IO_idqpp)
254 struct xfs_dquot *dqp;
257 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
261 * See if we already have it in the inode itself. IO_idqpp is &i_udquot
262 * or &i_gdquot. This made the code look weird, but made the logic a lot
267 trace_xfs_dqattach_found(dqp);
272 * Find the dquot from somewhere. This bumps the reference count of
273 * dquot and returns it locked. This can return ENOENT if dquot didn't
274 * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
275 * turned off suddenly.
277 error = xfs_qm_dqget_inode(ip, type, doalloc, &dqp);
281 trace_xfs_dqattach_get(dqp);
284 * dqget may have dropped and re-acquired the ilock, but it guarantees
285 * that the dquot returned is the one that should go in the inode.
293 xfs_qm_need_dqattach(
294 struct xfs_inode *ip)
296 struct xfs_mount *mp = ip->i_mount;
298 if (!XFS_IS_QUOTA_ON(mp))
300 if (!XFS_NOT_DQATTACHED(mp, ip))
302 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
308 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
310 * If @doalloc is true, the dquot(s) will be allocated if needed.
311 * Inode may get unlocked and relocked in here, and the caller must deal with
315 xfs_qm_dqattach_locked(
319 xfs_mount_t *mp = ip->i_mount;
322 if (!xfs_qm_need_dqattach(ip))
325 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
327 if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
328 error = xfs_qm_dqattach_one(ip, XFS_DQTYPE_USER,
329 doalloc, &ip->i_udquot);
332 ASSERT(ip->i_udquot);
335 if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
336 error = xfs_qm_dqattach_one(ip, XFS_DQTYPE_GROUP,
337 doalloc, &ip->i_gdquot);
340 ASSERT(ip->i_gdquot);
343 if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
344 error = xfs_qm_dqattach_one(ip, XFS_DQTYPE_PROJ,
345 doalloc, &ip->i_pdquot);
348 ASSERT(ip->i_pdquot);
353 * Don't worry about the dquots that we may have attached before any
354 * error - they'll get detached later if it has not already been done.
356 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
362 struct xfs_inode *ip)
366 if (!xfs_qm_need_dqattach(ip))
369 xfs_ilock(ip, XFS_ILOCK_EXCL);
370 error = xfs_qm_dqattach_locked(ip, false);
371 xfs_iunlock(ip, XFS_ILOCK_EXCL);
377 * Release dquots (and their references) if any.
378 * The inode should be locked EXCL except when this's called by
385 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
388 trace_xfs_dquot_dqdetach(ip);
390 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
392 xfs_qm_dqrele(ip->i_udquot);
396 xfs_qm_dqrele(ip->i_gdquot);
400 xfs_qm_dqrele(ip->i_pdquot);
405 struct xfs_qm_isolate {
406 struct list_head buffers;
407 struct list_head dispose;
410 static enum lru_status
411 xfs_qm_dquot_isolate(
412 struct list_head *item,
413 struct list_lru_one *lru,
414 spinlock_t *lru_lock,
416 __releases(lru_lock) __acquires(lru_lock)
418 struct xfs_dquot *dqp = container_of(item,
419 struct xfs_dquot, q_lru);
420 struct xfs_qm_isolate *isol = arg;
422 if (!xfs_dqlock_nowait(dqp))
426 * If something else is freeing this dquot and hasn't yet removed it
427 * from the LRU, leave it for the freeing task to complete the freeing
428 * process rather than risk it being free from under us here.
430 if (dqp->q_flags & XFS_DQFLAG_FREEING)
431 goto out_miss_unlock;
434 * This dquot has acquired a reference in the meantime remove it from
435 * the freelist and try again.
439 XFS_STATS_INC(dqp->q_mount, xs_qm_dqwants);
441 trace_xfs_dqreclaim_want(dqp);
442 list_lru_isolate(lru, &dqp->q_lru);
443 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
448 * If the dquot is dirty, flush it. If it's already being flushed, just
449 * skip it so there is time for the IO to complete before we try to
450 * reclaim it again on the next LRU pass.
452 if (!xfs_dqflock_nowait(dqp))
453 goto out_miss_unlock;
455 if (XFS_DQ_IS_DIRTY(dqp)) {
456 struct xfs_buf *bp = NULL;
459 trace_xfs_dqreclaim_dirty(dqp);
461 /* we have to drop the LRU lock to flush the dquot */
462 spin_unlock(lru_lock);
464 error = xfs_qm_dqflush(dqp, &bp);
466 goto out_unlock_dirty;
468 xfs_buf_delwri_queue(bp, &isol->buffers);
470 goto out_unlock_dirty;
475 * Prevent lookups now that we are past the point of no return.
477 dqp->q_flags |= XFS_DQFLAG_FREEING;
480 ASSERT(dqp->q_nrefs == 0);
481 list_lru_isolate_move(lru, &dqp->q_lru, &isol->dispose);
482 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
483 trace_xfs_dqreclaim_done(dqp);
484 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaims);
490 trace_xfs_dqreclaim_busy(dqp);
491 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
495 trace_xfs_dqreclaim_busy(dqp);
496 XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
504 struct shrinker *shrink,
505 struct shrink_control *sc)
507 struct xfs_quotainfo *qi = container_of(shrink,
508 struct xfs_quotainfo, qi_shrinker);
509 struct xfs_qm_isolate isol;
513 if ((sc->gfp_mask & (__GFP_FS|__GFP_DIRECT_RECLAIM)) != (__GFP_FS|__GFP_DIRECT_RECLAIM))
516 INIT_LIST_HEAD(&isol.buffers);
517 INIT_LIST_HEAD(&isol.dispose);
519 freed = list_lru_shrink_walk(&qi->qi_lru, sc,
520 xfs_qm_dquot_isolate, &isol);
522 error = xfs_buf_delwri_submit(&isol.buffers);
524 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
526 while (!list_empty(&isol.dispose)) {
527 struct xfs_dquot *dqp;
529 dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
530 list_del_init(&dqp->q_lru);
531 xfs_qm_dqfree_one(dqp);
539 struct shrinker *shrink,
540 struct shrink_control *sc)
542 struct xfs_quotainfo *qi = container_of(shrink,
543 struct xfs_quotainfo, qi_shrinker);
545 return list_lru_shrink_count(&qi->qi_lru, sc);
550 struct xfs_mount *mp,
552 struct xfs_quotainfo *qinf)
554 struct xfs_dquot *dqp;
555 struct xfs_def_quota *defq;
558 error = xfs_qm_dqget_uncached(mp, 0, type, &dqp);
562 defq = xfs_get_defquota(qinf, xfs_dquot_type(dqp));
565 * Timers and warnings have been already set, let's just set the
566 * default limits for this quota type
568 defq->blk.hard = dqp->q_blk.hardlimit;
569 defq->blk.soft = dqp->q_blk.softlimit;
570 defq->ino.hard = dqp->q_ino.hardlimit;
571 defq->ino.soft = dqp->q_ino.softlimit;
572 defq->rtb.hard = dqp->q_rtb.hardlimit;
573 defq->rtb.soft = dqp->q_rtb.softlimit;
574 xfs_qm_dqdestroy(dqp);
577 /* Initialize quota time limits from the root dquot. */
579 xfs_qm_init_timelimits(
580 struct xfs_mount *mp,
583 struct xfs_quotainfo *qinf = mp->m_quotainfo;
584 struct xfs_def_quota *defq;
585 struct xfs_dquot *dqp;
588 defq = xfs_get_defquota(qinf, type);
590 defq->blk.time = XFS_QM_BTIMELIMIT;
591 defq->ino.time = XFS_QM_ITIMELIMIT;
592 defq->rtb.time = XFS_QM_RTBTIMELIMIT;
595 * We try to get the limits from the superuser's limits fields.
596 * This is quite hacky, but it is standard quota practice.
598 * Since we may not have done a quotacheck by this point, just read
599 * the dquot without attaching it to any hashtables or lists.
601 error = xfs_qm_dqget_uncached(mp, 0, type, &dqp);
606 * The warnings and timers set the grace period given to
607 * a user or group before he or she can not perform any
608 * more writing. If it is zero, a default is used.
610 if (dqp->q_blk.timer)
611 defq->blk.time = dqp->q_blk.timer;
612 if (dqp->q_ino.timer)
613 defq->ino.time = dqp->q_ino.timer;
614 if (dqp->q_rtb.timer)
615 defq->rtb.time = dqp->q_rtb.timer;
617 xfs_qm_dqdestroy(dqp);
621 * This initializes all the quota information that's kept in the
625 xfs_qm_init_quotainfo(
626 struct xfs_mount *mp)
628 struct xfs_quotainfo *qinf;
631 ASSERT(XFS_IS_QUOTA_ON(mp));
633 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(struct xfs_quotainfo), 0);
635 error = list_lru_init(&qinf->qi_lru);
640 * See if quotainodes are setup, and if not, allocate them,
641 * and change the superblock accordingly.
643 error = xfs_qm_init_quotainos(mp);
647 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
648 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
649 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
650 mutex_init(&qinf->qi_tree_lock);
652 /* mutex used to serialize quotaoffs */
653 mutex_init(&qinf->qi_quotaofflock);
655 /* Precalc some constants */
656 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
657 qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
658 if (xfs_has_bigtime(mp)) {
659 qinf->qi_expiry_min =
660 xfs_dq_bigtime_to_unix(XFS_DQ_BIGTIME_EXPIRY_MIN);
661 qinf->qi_expiry_max =
662 xfs_dq_bigtime_to_unix(XFS_DQ_BIGTIME_EXPIRY_MAX);
664 qinf->qi_expiry_min = XFS_DQ_LEGACY_EXPIRY_MIN;
665 qinf->qi_expiry_max = XFS_DQ_LEGACY_EXPIRY_MAX;
667 trace_xfs_quota_expiry_range(mp, qinf->qi_expiry_min,
668 qinf->qi_expiry_max);
670 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
672 xfs_qm_init_timelimits(mp, XFS_DQTYPE_USER);
673 xfs_qm_init_timelimits(mp, XFS_DQTYPE_GROUP);
674 xfs_qm_init_timelimits(mp, XFS_DQTYPE_PROJ);
676 if (XFS_IS_UQUOTA_ON(mp))
677 xfs_qm_set_defquota(mp, XFS_DQTYPE_USER, qinf);
678 if (XFS_IS_GQUOTA_ON(mp))
679 xfs_qm_set_defquota(mp, XFS_DQTYPE_GROUP, qinf);
680 if (XFS_IS_PQUOTA_ON(mp))
681 xfs_qm_set_defquota(mp, XFS_DQTYPE_PROJ, qinf);
683 qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
684 qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
685 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
686 qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
688 error = register_shrinker(&qinf->qi_shrinker, "xfs-qm:%s",
696 mutex_destroy(&qinf->qi_quotaofflock);
697 mutex_destroy(&qinf->qi_tree_lock);
698 xfs_qm_destroy_quotainos(qinf);
700 list_lru_destroy(&qinf->qi_lru);
703 mp->m_quotainfo = NULL;
708 * Gets called when unmounting a filesystem or when all quotas get
710 * This purges the quota inodes, destroys locks and frees itself.
713 xfs_qm_destroy_quotainfo(
714 struct xfs_mount *mp)
716 struct xfs_quotainfo *qi;
718 qi = mp->m_quotainfo;
721 unregister_shrinker(&qi->qi_shrinker);
722 list_lru_destroy(&qi->qi_lru);
723 xfs_qm_destroy_quotainos(qi);
724 mutex_destroy(&qi->qi_tree_lock);
725 mutex_destroy(&qi->qi_quotaofflock);
727 mp->m_quotainfo = NULL;
731 * Create an inode and return with a reference already taken, but unlocked
732 * This is how we create quota inodes
736 struct xfs_mount *mp,
737 struct xfs_inode **ipp,
740 struct xfs_trans *tp;
742 bool need_alloc = true;
746 * With superblock that doesn't have separate pquotino, we
747 * share an inode between gquota and pquota. If the on-disk
748 * superblock has GQUOTA and the filesystem is now mounted
749 * with PQUOTA, just use sb_gquotino for sb_pquotino and
752 if (!xfs_has_pquotino(mp) &&
753 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
754 xfs_ino_t ino = NULLFSINO;
756 if ((flags & XFS_QMOPT_PQUOTA) &&
757 (mp->m_sb.sb_gquotino != NULLFSINO)) {
758 ino = mp->m_sb.sb_gquotino;
759 if (XFS_IS_CORRUPT(mp,
760 mp->m_sb.sb_pquotino != NULLFSINO))
761 return -EFSCORRUPTED;
762 } else if ((flags & XFS_QMOPT_GQUOTA) &&
763 (mp->m_sb.sb_pquotino != NULLFSINO)) {
764 ino = mp->m_sb.sb_pquotino;
765 if (XFS_IS_CORRUPT(mp,
766 mp->m_sb.sb_gquotino != NULLFSINO))
767 return -EFSCORRUPTED;
769 if (ino != NULLFSINO) {
770 error = xfs_iget(mp, NULL, ino, 0, 0, ipp);
773 mp->m_sb.sb_gquotino = NULLFSINO;
774 mp->m_sb.sb_pquotino = NULLFSINO;
779 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_create,
780 need_alloc ? XFS_QM_QINOCREATE_SPACE_RES(mp) : 0,
788 error = xfs_dialloc(&tp, 0, S_IFREG, &ino);
790 error = xfs_init_new_inode(&init_user_ns, tp, NULL, ino,
791 S_IFREG, 1, 0, 0, false, ipp);
793 xfs_trans_cancel(tp);
799 * Make the changes in the superblock, and log those too.
800 * sbfields arg may contain fields other than *QUOTINO;
801 * VERSIONNUM for example.
803 spin_lock(&mp->m_sb_lock);
804 if (flags & XFS_QMOPT_SBVERSION) {
805 ASSERT(!xfs_has_quota(mp));
808 mp->m_sb.sb_uquotino = NULLFSINO;
809 mp->m_sb.sb_gquotino = NULLFSINO;
810 mp->m_sb.sb_pquotino = NULLFSINO;
812 /* qflags will get updated fully _after_ quotacheck */
813 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
815 if (flags & XFS_QMOPT_UQUOTA)
816 mp->m_sb.sb_uquotino = (*ipp)->i_ino;
817 else if (flags & XFS_QMOPT_GQUOTA)
818 mp->m_sb.sb_gquotino = (*ipp)->i_ino;
820 mp->m_sb.sb_pquotino = (*ipp)->i_ino;
821 spin_unlock(&mp->m_sb_lock);
824 error = xfs_trans_commit(tp);
826 ASSERT(xfs_is_shutdown(mp));
827 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
830 xfs_finish_inode_setup(*ipp);
836 xfs_qm_reset_dqcounts(
837 struct xfs_mount *mp,
842 struct xfs_dqblk *dqb;
845 trace_xfs_reset_dqcounts(bp, _RET_IP_);
848 * Reset all counters and timers. They'll be
849 * started afresh by xfs_qm_quotacheck.
852 j = (int)XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) /
853 sizeof(struct xfs_dqblk);
854 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
857 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
858 struct xfs_disk_dquot *ddq;
860 ddq = (struct xfs_disk_dquot *)&dqb[j];
863 * Do a sanity check, and if needed, repair the dqblk. Don't
864 * output any warnings because it's perfectly possible to
865 * find uninitialised dquot blks. See comment in
868 if (xfs_dqblk_verify(mp, &dqb[j], id + j) ||
869 (dqb[j].dd_diskdq.d_type & XFS_DQTYPE_REC_MASK) != type)
870 xfs_dqblk_repair(mp, &dqb[j], id + j, type);
873 * Reset type in case we are reusing group quota file for
874 * project quotas or vice versa
882 * dquot id 0 stores the default grace period and the maximum
883 * warning limit that were set by the administrator, so we
884 * should not reset them.
886 if (ddq->d_id != 0) {
893 if (xfs_has_bigtime(mp))
894 ddq->d_type |= XFS_DQTYPE_BIGTIME;
897 if (xfs_has_crc(mp)) {
898 xfs_update_cksum((char *)&dqb[j],
899 sizeof(struct xfs_dqblk),
906 xfs_qm_reset_dqcounts_all(
907 struct xfs_mount *mp,
910 xfs_filblks_t blkcnt,
912 struct list_head *buffer_list)
920 * Blkcnt arg can be a very big number, and might even be
921 * larger than the log itself. So, we have to break it up into
922 * manageable-sized transactions.
923 * Note that we don't start a permanent transaction here; we might
924 * not be able to get a log reservation for the whole thing up front,
925 * and we don't really care to either, because we just discard
926 * everything if we were to crash in the middle of this loop.
929 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
930 XFS_FSB_TO_DADDR(mp, bno),
931 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
935 * CRC and validation errors will return a EFSCORRUPTED here. If
936 * this occurs, re-read without CRC validation so that we can
937 * repair the damage via xfs_qm_reset_dqcounts(). This process
938 * will leave a trace in the log indicating corruption has
941 if (error == -EFSCORRUPTED) {
942 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
943 XFS_FSB_TO_DADDR(mp, bno),
944 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
952 * A corrupt buffer might not have a verifier attached, so
953 * make sure we have the correct one attached before writeback
956 bp->b_ops = &xfs_dquot_buf_ops;
957 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
958 xfs_buf_delwri_queue(bp, buffer_list);
961 /* goto the next block. */
963 firstid += mp->m_quotainfo->qi_dqperchunk;
970 * Iterate over all allocated dquot blocks in this quota inode, zeroing all
971 * counters for every chunk of dquots that we find.
974 xfs_qm_reset_dqcounts_buf(
975 struct xfs_mount *mp,
976 struct xfs_inode *qip,
978 struct list_head *buffer_list)
980 struct xfs_bmbt_irec *map;
981 int i, nmaps; /* number of map entries */
982 int error; /* return value */
983 xfs_fileoff_t lblkno;
984 xfs_filblks_t maxlblkcnt;
986 xfs_fsblock_t rablkno;
987 xfs_filblks_t rablkcnt;
991 * This looks racy, but we can't keep an inode lock across a
992 * trans_reserve. But, this gets called during quotacheck, and that
993 * happens only at mount time which is single threaded.
995 if (qip->i_nblocks == 0)
998 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), 0);
1001 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
1005 nmaps = XFS_DQITER_MAP_SIZE;
1007 * We aren't changing the inode itself. Just changing
1008 * some of its data. No new blocks are added here, and
1009 * the inode is never added to the transaction.
1011 lock_mode = xfs_ilock_data_map_shared(qip);
1012 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1014 xfs_iunlock(qip, lock_mode);
1018 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1019 for (i = 0; i < nmaps; i++) {
1020 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1021 ASSERT(map[i].br_blockcount);
1024 lblkno += map[i].br_blockcount;
1026 if (map[i].br_startblock == HOLESTARTBLOCK)
1029 firstid = (xfs_dqid_t) map[i].br_startoff *
1030 mp->m_quotainfo->qi_dqperchunk;
1032 * Do a read-ahead on the next extent.
1034 if ((i+1 < nmaps) &&
1035 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1036 rablkcnt = map[i+1].br_blockcount;
1037 rablkno = map[i+1].br_startblock;
1038 while (rablkcnt--) {
1039 xfs_buf_readahead(mp->m_ddev_targp,
1040 XFS_FSB_TO_DADDR(mp, rablkno),
1041 mp->m_quotainfo->qi_dqchunklen,
1042 &xfs_dquot_buf_ops);
1047 * Iterate thru all the blks in the extent and
1048 * reset the counters of all the dquots inside them.
1050 error = xfs_qm_reset_dqcounts_all(mp, firstid,
1051 map[i].br_startblock,
1052 map[i].br_blockcount,
1057 } while (nmaps > 0);
1065 * Called by dqusage_adjust in doing a quotacheck.
1067 * Given the inode, and a dquot id this updates both the incore dqout as well
1068 * as the buffer copy. This is so that once the quotacheck is done, we can
1069 * just log all the buffers, as opposed to logging numerous updates to
1070 * individual dquots.
1073 xfs_qm_quotacheck_dqadjust(
1074 struct xfs_inode *ip,
1079 struct xfs_mount *mp = ip->i_mount;
1080 struct xfs_dquot *dqp;
1084 id = xfs_qm_id_for_quotatype(ip, type);
1085 error = xfs_qm_dqget(mp, id, type, true, &dqp);
1088 * Shouldn't be able to turn off quotas here.
1090 ASSERT(error != -ESRCH);
1091 ASSERT(error != -ENOENT);
1095 trace_xfs_dqadjust(dqp);
1098 * Adjust the inode count and the block count to reflect this inode's
1102 dqp->q_ino.reserved++;
1104 dqp->q_blk.count += nblks;
1105 dqp->q_blk.reserved += nblks;
1108 dqp->q_rtb.count += rtblks;
1109 dqp->q_rtb.reserved += rtblks;
1113 * Set default limits, adjust timers (since we changed usages)
1115 * There are no timers for the default values set in the root dquot.
1118 xfs_qm_adjust_dqlimits(dqp);
1119 xfs_qm_adjust_dqtimers(dqp);
1122 dqp->q_flags |= XFS_DQFLAG_DIRTY;
1128 * callback routine supplied to bulkstat(). Given an inumber, find its
1129 * dquots and update them to account for resources taken by that inode.
1133 xfs_qm_dqusage_adjust(
1134 struct xfs_mount *mp,
1135 struct xfs_trans *tp,
1139 struct xfs_inode *ip;
1141 xfs_filblks_t rtblks = 0; /* total rt blks */
1144 ASSERT(XFS_IS_QUOTA_ON(mp));
1147 * rootino must have its resources accounted for, not so with the quota
1150 if (xfs_is_quota_inode(&mp->m_sb, ino))
1154 * We don't _need_ to take the ilock EXCL here because quotacheck runs
1155 * at mount time and therefore nobody will be racing chown/chproj.
1157 error = xfs_iget(mp, tp, ino, XFS_IGET_DONTCACHE, 0, &ip);
1158 if (error == -EINVAL || error == -ENOENT)
1163 ASSERT(ip->i_delayed_blks == 0);
1165 if (XFS_IS_REALTIME_INODE(ip)) {
1166 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);
1168 error = xfs_iread_extents(tp, ip, XFS_DATA_FORK);
1172 xfs_bmap_count_leaves(ifp, &rtblks);
1175 nblks = (xfs_qcnt_t)ip->i_nblocks - rtblks;
1178 * Add the (disk blocks and inode) resources occupied by this
1179 * inode to its dquots. We do this adjustment in the incore dquot,
1180 * and also copy the changes to its buffer.
1181 * We don't care about putting these changes in a transaction
1182 * envelope because if we crash in the middle of a 'quotacheck'
1183 * we have to start from the beginning anyway.
1184 * Once we're done, we'll log all the dquot bufs.
1186 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1187 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1189 if (XFS_IS_UQUOTA_ON(mp)) {
1190 error = xfs_qm_quotacheck_dqadjust(ip, XFS_DQTYPE_USER, nblks,
1196 if (XFS_IS_GQUOTA_ON(mp)) {
1197 error = xfs_qm_quotacheck_dqadjust(ip, XFS_DQTYPE_GROUP, nblks,
1203 if (XFS_IS_PQUOTA_ON(mp)) {
1204 error = xfs_qm_quotacheck_dqadjust(ip, XFS_DQTYPE_PROJ, nblks,
1217 struct xfs_dquot *dqp,
1220 struct xfs_mount *mp = dqp->q_mount;
1221 struct list_head *buffer_list = data;
1222 struct xfs_buf *bp = NULL;
1226 if (dqp->q_flags & XFS_DQFLAG_FREEING)
1228 if (!XFS_DQ_IS_DIRTY(dqp))
1232 * The only way the dquot is already flush locked by the time quotacheck
1233 * gets here is if reclaim flushed it before the dqadjust walk dirtied
1234 * it for the final time. Quotacheck collects all dquot bufs in the
1235 * local delwri queue before dquots are dirtied, so reclaim can't have
1236 * possibly queued it for I/O. The only way out is to push the buffer to
1237 * cycle the flush lock.
1239 if (!xfs_dqflock_nowait(dqp)) {
1240 /* buf is pinned in-core by delwri list */
1241 error = xfs_buf_incore(mp->m_ddev_targp, dqp->q_blkno,
1242 mp->m_quotainfo->qi_dqchunklen, 0, &bp);
1246 if (!(bp->b_flags & _XBF_DELWRI_Q)) {
1253 xfs_buf_delwri_pushbuf(bp, buffer_list);
1260 error = xfs_qm_dqflush(dqp, &bp);
1264 xfs_buf_delwri_queue(bp, buffer_list);
1272 * Walk thru all the filesystem inodes and construct a consistent view
1273 * of the disk quota world. If the quotacheck fails, disable quotas.
1281 LIST_HEAD (buffer_list);
1282 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1283 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1284 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1288 ASSERT(uip || gip || pip);
1289 ASSERT(XFS_IS_QUOTA_ON(mp));
1291 xfs_notice(mp, "Quotacheck needed: Please wait.");
1294 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1295 * their counters to zero. We need a clean slate.
1296 * We don't log our changes till later.
1299 error = xfs_qm_reset_dqcounts_buf(mp, uip, XFS_DQTYPE_USER,
1303 flags |= XFS_UQUOTA_CHKD;
1307 error = xfs_qm_reset_dqcounts_buf(mp, gip, XFS_DQTYPE_GROUP,
1311 flags |= XFS_GQUOTA_CHKD;
1315 error = xfs_qm_reset_dqcounts_buf(mp, pip, XFS_DQTYPE_PROJ,
1319 flags |= XFS_PQUOTA_CHKD;
1322 error = xfs_iwalk_threaded(mp, 0, 0, xfs_qm_dqusage_adjust, 0, true,
1326 * The inode walk may have partially populated the dquot
1327 * caches. We must purge them before disabling quota and
1328 * tearing down the quotainfo, or else the dquots will leak.
1330 xfs_qm_dqpurge_all(mp);
1335 * We've made all the changes that we need to make incore. Flush them
1336 * down to disk buffers if everything was updated successfully.
1338 if (XFS_IS_UQUOTA_ON(mp)) {
1339 error = xfs_qm_dquot_walk(mp, XFS_DQTYPE_USER, xfs_qm_flush_one,
1342 if (XFS_IS_GQUOTA_ON(mp)) {
1343 error2 = xfs_qm_dquot_walk(mp, XFS_DQTYPE_GROUP, xfs_qm_flush_one,
1348 if (XFS_IS_PQUOTA_ON(mp)) {
1349 error2 = xfs_qm_dquot_walk(mp, XFS_DQTYPE_PROJ, xfs_qm_flush_one,
1355 error2 = xfs_buf_delwri_submit(&buffer_list);
1360 * We can get this error if we couldn't do a dquot allocation inside
1361 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1362 * dirty dquots that might be cached, we just want to get rid of them
1363 * and turn quotaoff. The dquots won't be attached to any of the inodes
1364 * at this point (because we intentionally didn't in dqget_noattach).
1367 xfs_qm_dqpurge_all(mp);
1372 * If one type of quotas is off, then it will lose its
1373 * quotachecked status, since we won't be doing accounting for
1374 * that type anymore.
1376 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1377 mp->m_qflags |= flags;
1380 xfs_buf_delwri_cancel(&buffer_list);
1384 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1387 * We must turn off quotas.
1389 ASSERT(mp->m_quotainfo != NULL);
1390 xfs_qm_destroy_quotainfo(mp);
1391 if (xfs_mount_reset_sbqflags(mp)) {
1393 "Quotacheck: Failed to reset quota flags.");
1396 xfs_notice(mp, "Quotacheck: Done.");
1401 * This is called from xfs_mountfs to start quotas and initialize all
1402 * necessary data structures like quotainfo. This is also responsible for
1403 * running a quotacheck as necessary. We are guaranteed that the superblock
1404 * is consistently read in at this point.
1406 * If we fail here, the mount will continue with quota turned off. We don't
1407 * need to inidicate success or failure at all.
1410 xfs_qm_mount_quotas(
1411 struct xfs_mount *mp)
1417 * If quotas on realtime volumes is not supported, we disable
1418 * quotas immediately.
1420 if (mp->m_sb.sb_rextents) {
1421 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
1426 ASSERT(XFS_IS_QUOTA_ON(mp));
1429 * Allocate the quotainfo structure inside the mount struct, and
1430 * create quotainode(s), and change/rev superblock if necessary.
1432 error = xfs_qm_init_quotainfo(mp);
1435 * We must turn off quotas.
1437 ASSERT(mp->m_quotainfo == NULL);
1442 * If any of the quotas are not consistent, do a quotacheck.
1444 if (XFS_QM_NEED_QUOTACHECK(mp)) {
1445 error = xfs_qm_quotacheck(mp);
1447 /* Quotacheck failed and disabled quotas. */
1452 * If one type of quotas is off, then it will lose its
1453 * quotachecked status, since we won't be doing accounting for
1454 * that type anymore.
1456 if (!XFS_IS_UQUOTA_ON(mp))
1457 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
1458 if (!XFS_IS_GQUOTA_ON(mp))
1459 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
1460 if (!XFS_IS_PQUOTA_ON(mp))
1461 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
1465 * We actually don't have to acquire the m_sb_lock at all.
1466 * This can only be called from mount, and that's single threaded. XXX
1468 spin_lock(&mp->m_sb_lock);
1469 sbf = mp->m_sb.sb_qflags;
1470 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
1471 spin_unlock(&mp->m_sb_lock);
1473 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
1474 if (xfs_sync_sb(mp, false)) {
1476 * We could only have been turning quotas off.
1477 * We aren't in very good shape actually because
1478 * the incore structures are convinced that quotas are
1479 * off, but the on disk superblock doesn't know that !
1481 ASSERT(!(XFS_IS_QUOTA_ON(mp)));
1482 xfs_alert(mp, "%s: Superblock update failed!",
1488 xfs_warn(mp, "Failed to initialize disk quotas.");
1494 * This is called after the superblock has been read in and we're ready to
1495 * iget the quota inodes.
1498 xfs_qm_init_quotainos(
1501 struct xfs_inode *uip = NULL;
1502 struct xfs_inode *gip = NULL;
1503 struct xfs_inode *pip = NULL;
1507 ASSERT(mp->m_quotainfo);
1510 * Get the uquota and gquota inodes
1512 if (xfs_has_quota(mp)) {
1513 if (XFS_IS_UQUOTA_ON(mp) &&
1514 mp->m_sb.sb_uquotino != NULLFSINO) {
1515 ASSERT(mp->m_sb.sb_uquotino > 0);
1516 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1521 if (XFS_IS_GQUOTA_ON(mp) &&
1522 mp->m_sb.sb_gquotino != NULLFSINO) {
1523 ASSERT(mp->m_sb.sb_gquotino > 0);
1524 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1529 if (XFS_IS_PQUOTA_ON(mp) &&
1530 mp->m_sb.sb_pquotino != NULLFSINO) {
1531 ASSERT(mp->m_sb.sb_pquotino > 0);
1532 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1538 flags |= XFS_QMOPT_SBVERSION;
1542 * Create the three inodes, if they don't exist already. The changes
1543 * made above will get added to a transaction and logged in one of
1544 * the qino_alloc calls below. If the device is readonly,
1545 * temporarily switch to read-write to do this.
1547 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1548 error = xfs_qm_qino_alloc(mp, &uip,
1549 flags | XFS_QMOPT_UQUOTA);
1553 flags &= ~XFS_QMOPT_SBVERSION;
1555 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1556 error = xfs_qm_qino_alloc(mp, &gip,
1557 flags | XFS_QMOPT_GQUOTA);
1561 flags &= ~XFS_QMOPT_SBVERSION;
1563 if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1564 error = xfs_qm_qino_alloc(mp, &pip,
1565 flags | XFS_QMOPT_PQUOTA);
1570 mp->m_quotainfo->qi_uquotaip = uip;
1571 mp->m_quotainfo->qi_gquotaip = gip;
1572 mp->m_quotainfo->qi_pquotaip = pip;
1587 xfs_qm_destroy_quotainos(
1588 struct xfs_quotainfo *qi)
1590 if (qi->qi_uquotaip) {
1591 xfs_irele(qi->qi_uquotaip);
1592 qi->qi_uquotaip = NULL; /* paranoia */
1594 if (qi->qi_gquotaip) {
1595 xfs_irele(qi->qi_gquotaip);
1596 qi->qi_gquotaip = NULL;
1598 if (qi->qi_pquotaip) {
1599 xfs_irele(qi->qi_pquotaip);
1600 qi->qi_pquotaip = NULL;
1606 struct xfs_dquot *dqp)
1608 struct xfs_mount *mp = dqp->q_mount;
1609 struct xfs_quotainfo *qi = mp->m_quotainfo;
1611 mutex_lock(&qi->qi_tree_lock);
1612 radix_tree_delete(xfs_dquot_tree(qi, xfs_dquot_type(dqp)), dqp->q_id);
1615 mutex_unlock(&qi->qi_tree_lock);
1617 xfs_qm_dqdestroy(dqp);
1620 /* --------------- utility functions for vnodeops ---------------- */
1624 * Given an inode, a uid, gid and prid make sure that we have
1625 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1626 * quotas by creating this file.
1627 * This also attaches dquot(s) to the given inode after locking it,
1628 * and returns the dquots corresponding to the uid and/or gid.
1630 * in : inode (unlocked)
1631 * out : udquot, gdquot with references taken and unlocked
1635 struct xfs_inode *ip,
1640 struct xfs_dquot **O_udqpp,
1641 struct xfs_dquot **O_gdqpp,
1642 struct xfs_dquot **O_pdqpp)
1644 struct xfs_mount *mp = ip->i_mount;
1645 struct inode *inode = VFS_I(ip);
1646 struct user_namespace *user_ns = inode->i_sb->s_user_ns;
1647 struct xfs_dquot *uq = NULL;
1648 struct xfs_dquot *gq = NULL;
1649 struct xfs_dquot *pq = NULL;
1653 if (!XFS_IS_QUOTA_ON(mp))
1656 lockflags = XFS_ILOCK_EXCL;
1657 xfs_ilock(ip, lockflags);
1659 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1663 * Attach the dquot(s) to this inode, doing a dquot allocation
1664 * if necessary. The dquot(s) will not be locked.
1666 if (XFS_NOT_DQATTACHED(mp, ip)) {
1667 error = xfs_qm_dqattach_locked(ip, true);
1669 xfs_iunlock(ip, lockflags);
1674 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1676 if (!uid_eq(inode->i_uid, uid)) {
1678 * What we need is the dquot that has this uid, and
1679 * if we send the inode to dqget, the uid of the inode
1680 * takes priority over what's sent in the uid argument.
1681 * We must unlock inode here before calling dqget if
1682 * we're not sending the inode, because otherwise
1683 * we'll deadlock by doing trans_reserve while
1686 xfs_iunlock(ip, lockflags);
1687 error = xfs_qm_dqget(mp, from_kuid(user_ns, uid),
1688 XFS_DQTYPE_USER, true, &uq);
1690 ASSERT(error != -ENOENT);
1694 * Get the ilock in the right order.
1697 lockflags = XFS_ILOCK_SHARED;
1698 xfs_ilock(ip, lockflags);
1701 * Take an extra reference, because we'll return
1704 ASSERT(ip->i_udquot);
1705 uq = xfs_qm_dqhold(ip->i_udquot);
1708 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1710 if (!gid_eq(inode->i_gid, gid)) {
1711 xfs_iunlock(ip, lockflags);
1712 error = xfs_qm_dqget(mp, from_kgid(user_ns, gid),
1713 XFS_DQTYPE_GROUP, true, &gq);
1715 ASSERT(error != -ENOENT);
1719 lockflags = XFS_ILOCK_SHARED;
1720 xfs_ilock(ip, lockflags);
1722 ASSERT(ip->i_gdquot);
1723 gq = xfs_qm_dqhold(ip->i_gdquot);
1726 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1728 if (ip->i_projid != prid) {
1729 xfs_iunlock(ip, lockflags);
1730 error = xfs_qm_dqget(mp, prid,
1731 XFS_DQTYPE_PROJ, true, &pq);
1733 ASSERT(error != -ENOENT);
1737 lockflags = XFS_ILOCK_SHARED;
1738 xfs_ilock(ip, lockflags);
1740 ASSERT(ip->i_pdquot);
1741 pq = xfs_qm_dqhold(ip->i_pdquot);
1744 trace_xfs_dquot_dqalloc(ip);
1746 xfs_iunlock(ip, lockflags);
1768 * Actually transfer ownership, and do dquot modifications.
1769 * These were already reserved.
1773 struct xfs_trans *tp,
1774 struct xfs_inode *ip,
1775 struct xfs_dquot **IO_olddq,
1776 struct xfs_dquot *newdq)
1778 struct xfs_dquot *prevdq;
1779 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1780 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1783 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1784 ASSERT(XFS_IS_QUOTA_ON(ip->i_mount));
1789 ASSERT(prevdq != newdq);
1791 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_nblocks));
1792 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1794 /* the sparkling new dquot */
1795 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_nblocks);
1796 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1799 * Back when we made quota reservations for the chown, we reserved the
1800 * ondisk blocks + delalloc blocks with the new dquot. Now that we've
1801 * switched the dquots, decrease the new dquot's block reservation
1802 * (having already bumped up the real counter) so that we don't have
1803 * any reservation to give back when we commit.
1805 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_RES_BLKS,
1806 -ip->i_delayed_blks);
1809 * Give the incore reservation for delalloc blocks back to the old
1810 * dquot. We don't normally handle delalloc quota reservations
1811 * transactionally, so just lock the dquot and subtract from the
1812 * reservation. Dirty the transaction because it's too late to turn
1815 tp->t_flags |= XFS_TRANS_DIRTY;
1817 ASSERT(prevdq->q_blk.reserved >= ip->i_delayed_blks);
1818 prevdq->q_blk.reserved -= ip->i_delayed_blks;
1819 xfs_dqunlock(prevdq);
1822 * Take an extra reference, because the inode is going to keep
1823 * this dquot pointer even after the trans_commit.
1825 *IO_olddq = xfs_qm_dqhold(newdq);
1831 xfs_qm_vop_rename_dqattach(
1832 struct xfs_inode **i_tab)
1834 struct xfs_mount *mp = i_tab[0]->i_mount;
1837 if (!XFS_IS_QUOTA_ON(mp))
1840 for (i = 0; (i < 4 && i_tab[i]); i++) {
1841 struct xfs_inode *ip = i_tab[i];
1845 * Watch out for duplicate entries in the table.
1847 if (i == 0 || ip != i_tab[i-1]) {
1848 if (XFS_NOT_DQATTACHED(mp, ip)) {
1849 error = xfs_qm_dqattach(ip);
1859 xfs_qm_vop_create_dqattach(
1860 struct xfs_trans *tp,
1861 struct xfs_inode *ip,
1862 struct xfs_dquot *udqp,
1863 struct xfs_dquot *gdqp,
1864 struct xfs_dquot *pdqp)
1866 struct xfs_mount *mp = tp->t_mountp;
1868 if (!XFS_IS_QUOTA_ON(mp))
1871 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1873 if (udqp && XFS_IS_UQUOTA_ON(mp)) {
1874 ASSERT(ip->i_udquot == NULL);
1875 ASSERT(i_uid_read(VFS_I(ip)) == udqp->q_id);
1877 ip->i_udquot = xfs_qm_dqhold(udqp);
1878 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1880 if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
1881 ASSERT(ip->i_gdquot == NULL);
1882 ASSERT(i_gid_read(VFS_I(ip)) == gdqp->q_id);
1884 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1885 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1887 if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
1888 ASSERT(ip->i_pdquot == NULL);
1889 ASSERT(ip->i_projid == pdqp->q_id);
1891 ip->i_pdquot = xfs_qm_dqhold(pdqp);
1892 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
1896 /* Decide if this inode's dquot is near an enforcement boundary. */
1898 xfs_inode_near_dquot_enforcement(
1899 struct xfs_inode *ip,
1902 struct xfs_dquot *dqp;
1905 /* We only care for quotas that are enabled and enforced. */
1906 dqp = xfs_inode_dquot(ip, type);
1907 if (!dqp || !xfs_dquot_is_enforced(dqp))
1910 if (xfs_dquot_res_over_limits(&dqp->q_ino) ||
1911 xfs_dquot_res_over_limits(&dqp->q_rtb))
1914 /* For space on the data device, check the various thresholds. */
1915 if (!dqp->q_prealloc_hi_wmark)
1918 if (dqp->q_blk.reserved < dqp->q_prealloc_lo_wmark)
1921 if (dqp->q_blk.reserved >= dqp->q_prealloc_hi_wmark)
1924 freesp = dqp->q_prealloc_hi_wmark - dqp->q_blk.reserved;
1925 if (freesp < dqp->q_low_space[XFS_QLOWSP_5_PCNT])