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 *);
54 STATIC int xfs_qm_shake(struct shrinker *, struct shrink_control *);
57 * We use the batch lookup interface to iterate over the dquots as it
58 * currently is the only interface into the radix tree code that allows
59 * fuzzy lookups instead of exact matches. Holding the lock over multiple
60 * operations is fine as all callers are used either during mount/umount
63 #define XFS_DQ_LOOKUP_BATCH 32
69 int (*execute)(struct xfs_dquot *dqp, void *data),
72 struct xfs_quotainfo *qi = mp->m_quotainfo;
73 struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
85 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
89 mutex_lock(&qi->qi_tree_lock);
90 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
91 next_index, XFS_DQ_LOOKUP_BATCH);
93 mutex_unlock(&qi->qi_tree_lock);
97 for (i = 0; i < nr_found; i++) {
98 struct xfs_dquot *dqp = batch[i];
100 next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
102 error = execute(batch[i], data);
103 if (error == EAGAIN) {
107 if (error && last_error != EFSCORRUPTED)
111 mutex_unlock(&qi->qi_tree_lock);
113 /* bail out if the filesystem is corrupted. */
114 if (last_error == EFSCORRUPTED) {
130 * Purge a dquot from all tracking data structures and free it.
134 struct xfs_dquot *dqp,
137 struct xfs_mount *mp = dqp->q_mount;
138 struct xfs_quotainfo *qi = mp->m_quotainfo;
139 struct xfs_dquot *gdqp = NULL;
140 struct xfs_dquot *pdqp = NULL;
143 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
149 * If this quota has a hint attached, prepare for releasing it now.
151 gdqp = dqp->q_gdquot;
154 dqp->q_gdquot = NULL;
157 pdqp = dqp->q_pdquot;
160 dqp->q_pdquot = NULL;
163 dqp->dq_flags |= XFS_DQ_FREEING;
168 * If we are turning this type of quotas off, we don't care
169 * about the dirty metadata sitting in this dquot. OTOH, if
170 * we're unmounting, we do care, so we flush it and wait.
172 if (XFS_DQ_IS_DIRTY(dqp)) {
173 struct xfs_buf *bp = NULL;
177 * We don't care about getting disk errors here. We need
178 * to purge this dquot anyway, so we go ahead regardless.
180 error = xfs_qm_dqflush(dqp, &bp);
182 xfs_warn(mp, "%s: dquot %p flush failed",
185 error = xfs_bwrite(bp);
191 ASSERT(atomic_read(&dqp->q_pincount) == 0);
192 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
193 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
198 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
199 be32_to_cpu(dqp->q_core.d_id));
203 * We move dquots to the freelist as soon as their reference count
204 * hits zero, so it really should be on the freelist here.
206 mutex_lock(&qi->qi_lru_lock);
207 ASSERT(!list_empty(&dqp->q_lru));
208 list_del_init(&dqp->q_lru);
210 XFS_STATS_DEC(xs_qm_dquot_unused);
211 mutex_unlock(&qi->qi_lru_lock);
213 xfs_qm_dqdestroy(dqp);
223 * Purge the dquot cache.
227 struct xfs_mount *mp,
230 if (flags & XFS_QMOPT_UQUOTA)
231 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
232 if (flags & XFS_QMOPT_GQUOTA)
233 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
234 if (flags & XFS_QMOPT_PQUOTA)
235 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
239 * Just destroy the quotainfo structure.
243 struct xfs_mount *mp)
245 if (mp->m_quotainfo) {
246 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
247 xfs_qm_destroy_quotainfo(mp);
253 * This is called from xfs_mountfs to start quotas and initialize all
254 * necessary data structures like quotainfo. This is also responsible for
255 * running a quotacheck as necessary. We are guaranteed that the superblock
256 * is consistently read in at this point.
258 * If we fail here, the mount will continue with quota turned off. We don't
259 * need to inidicate success or failure at all.
269 * If quotas on realtime volumes is not supported, we disable
270 * quotas immediately.
272 if (mp->m_sb.sb_rextents) {
273 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
278 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
281 * Allocate the quotainfo structure inside the mount struct, and
282 * create quotainode(s), and change/rev superblock if necessary.
284 error = xfs_qm_init_quotainfo(mp);
287 * We must turn off quotas.
289 ASSERT(mp->m_quotainfo == NULL);
294 * If any of the quotas are not consistent, do a quotacheck.
296 if (XFS_QM_NEED_QUOTACHECK(mp)) {
297 error = xfs_qm_quotacheck(mp);
299 /* Quotacheck failed and disabled quotas. */
304 * If one type of quotas is off, then it will lose its
305 * quotachecked status, since we won't be doing accounting for
308 if (!XFS_IS_UQUOTA_ON(mp))
309 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
310 if (!XFS_IS_GQUOTA_ON(mp))
311 mp->m_qflags &= ~XFS_GQUOTA_CHKD;
312 if (!XFS_IS_PQUOTA_ON(mp))
313 mp->m_qflags &= ~XFS_PQUOTA_CHKD;
317 * We actually don't have to acquire the m_sb_lock at all.
318 * This can only be called from mount, and that's single threaded. XXX
320 spin_lock(&mp->m_sb_lock);
321 sbf = mp->m_sb.sb_qflags;
322 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
323 spin_unlock(&mp->m_sb_lock);
325 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
326 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
328 * We could only have been turning quotas off.
329 * We aren't in very good shape actually because
330 * the incore structures are convinced that quotas are
331 * off, but the on disk superblock doesn't know that !
333 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
334 xfs_alert(mp, "%s: Superblock update failed!",
340 xfs_warn(mp, "Failed to initialize disk quotas.");
346 * Called from the vfsops layer.
349 xfs_qm_unmount_quotas(
353 * Release the dquots that root inode, et al might be holding,
354 * before we flush quotas and blow away the quotainfo structure.
356 ASSERT(mp->m_rootip);
357 xfs_qm_dqdetach(mp->m_rootip);
359 xfs_qm_dqdetach(mp->m_rbmip);
361 xfs_qm_dqdetach(mp->m_rsumip);
364 * Release the quota inodes.
366 if (mp->m_quotainfo) {
367 if (mp->m_quotainfo->qi_uquotaip) {
368 IRELE(mp->m_quotainfo->qi_uquotaip);
369 mp->m_quotainfo->qi_uquotaip = NULL;
371 if (mp->m_quotainfo->qi_gquotaip) {
372 IRELE(mp->m_quotainfo->qi_gquotaip);
373 mp->m_quotainfo->qi_gquotaip = NULL;
375 if (mp->m_quotainfo->qi_pquotaip) {
376 IRELE(mp->m_quotainfo->qi_pquotaip);
377 mp->m_quotainfo->qi_pquotaip = NULL;
388 xfs_dquot_t *udqhint, /* hint */
389 xfs_dquot_t **IO_idqpp)
394 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
398 * See if we already have it in the inode itself. IO_idqpp is
399 * &i_udquot or &i_gdquot. This made the code look weird, but
400 * made the logic a lot simpler.
404 trace_xfs_dqattach_found(dqp);
409 * udqhint is the i_udquot field in inode, and is non-NULL only
410 * when the type arg is group/project. Its purpose is to save a
411 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
415 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
419 * No need to take dqlock to look at the id.
421 * The ID can't change until it gets reclaimed, and it won't
422 * be reclaimed as long as we have a ref from inode and we
425 if (type == XFS_DQ_GROUP)
426 dqp = udqhint->q_gdquot;
428 dqp = udqhint->q_pdquot;
429 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
430 ASSERT(*IO_idqpp == NULL);
432 *IO_idqpp = xfs_qm_dqhold(dqp);
433 xfs_dqunlock(udqhint);
438 * We can't hold a dquot lock when we call the dqget code.
439 * We'll deadlock in no time, because of (not conforming to)
440 * lock ordering - the inodelock comes before any dquot lock,
441 * and we may drop and reacquire the ilock in xfs_qm_dqget().
443 xfs_dqunlock(udqhint);
447 * Find the dquot from somewhere. This bumps the
448 * reference count of dquot and returns it locked.
449 * This can return ENOENT if dquot didn't exist on
450 * disk and we didn't ask it to allocate;
451 * ESRCH if quotas got turned off suddenly.
453 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
454 doalloc | XFS_QMOPT_DOWARN, &dqp);
458 trace_xfs_dqattach_get(dqp);
461 * dqget may have dropped and re-acquired the ilock, but it guarantees
462 * that the dquot returned is the one that should go in the inode.
471 * Given a udquot and group/project type, attach the group/project
472 * dquot pointer to the udquot as a hint for future lookups.
475 xfs_qm_dqattach_hint(
476 struct xfs_inode *ip,
479 struct xfs_dquot **dqhintp;
480 struct xfs_dquot *dqp;
481 struct xfs_dquot *udq = ip->i_udquot;
483 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
487 if (type == XFS_DQ_GROUP) {
489 dqhintp = &udq->q_gdquot;
492 dqhintp = &udq->q_pdquot;
496 struct xfs_dquot *tmp;
506 *dqhintp = xfs_qm_dqhold(dqp);
512 xfs_qm_need_dqattach(
513 struct xfs_inode *ip)
515 struct xfs_mount *mp = ip->i_mount;
517 if (!XFS_IS_QUOTA_RUNNING(mp))
519 if (!XFS_IS_QUOTA_ON(mp))
521 if (!XFS_NOT_DQATTACHED(mp, ip))
523 if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
529 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
531 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
532 * Inode may get unlocked and relocked in here, and the caller must deal with
536 xfs_qm_dqattach_locked(
540 xfs_mount_t *mp = ip->i_mount;
544 if (!xfs_qm_need_dqattach(ip))
547 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
549 if (XFS_IS_UQUOTA_ON(mp)) {
550 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
551 flags & XFS_QMOPT_DQALLOC,
552 NULL, &ip->i_udquot);
558 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
559 if (XFS_IS_GQUOTA_ON(mp)) {
560 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
561 flags & XFS_QMOPT_DQALLOC,
562 ip->i_udquot, &ip->i_gdquot);
564 * Don't worry about the udquot that we may have
565 * attached above. It'll get detached, if not already.
572 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
573 if (XFS_IS_PQUOTA_ON(mp)) {
574 error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
575 flags & XFS_QMOPT_DQALLOC,
576 ip->i_udquot, &ip->i_pdquot);
578 * Don't worry about the udquot that we may have
579 * attached above. It'll get detached, if not already.
587 * Attach this group/project quota to the user quota as a hint.
588 * This WON'T, in general, result in a thrash.
590 if (nquotas > 1 && ip->i_udquot) {
591 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
592 ASSERT(ip->i_gdquot || !XFS_IS_GQUOTA_ON(mp));
593 ASSERT(ip->i_pdquot || !XFS_IS_PQUOTA_ON(mp));
596 * We do not have i_udquot locked at this point, but this check
597 * is OK since we don't depend on the i_gdquot to be accurate
598 * 100% all the time. It is just a hint, and this will
599 * succeed in general.
601 if (ip->i_udquot->q_gdquot != ip->i_gdquot)
602 xfs_qm_dqattach_hint(ip, XFS_DQ_GROUP);
604 if (ip->i_udquot->q_pdquot != ip->i_pdquot)
605 xfs_qm_dqattach_hint(ip, XFS_DQ_PROJ);
611 if (XFS_IS_UQUOTA_ON(mp))
612 ASSERT(ip->i_udquot);
613 if (XFS_IS_GQUOTA_ON(mp))
614 ASSERT(ip->i_gdquot);
615 if (XFS_IS_PQUOTA_ON(mp))
616 ASSERT(ip->i_pdquot);
618 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
625 struct xfs_inode *ip,
630 if (!xfs_qm_need_dqattach(ip))
633 xfs_ilock(ip, XFS_ILOCK_EXCL);
634 error = xfs_qm_dqattach_locked(ip, flags);
635 xfs_iunlock(ip, XFS_ILOCK_EXCL);
641 * Release dquots (and their references) if any.
642 * The inode should be locked EXCL except when this's called by
649 if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
652 trace_xfs_dquot_dqdetach(ip);
654 ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
656 xfs_qm_dqrele(ip->i_udquot);
660 xfs_qm_dqrele(ip->i_gdquot);
664 xfs_qm_dqrele(ip->i_pdquot);
670 xfs_qm_calc_dquots_per_chunk(
671 struct xfs_mount *mp,
672 unsigned int nbblks) /* basic block units */
674 unsigned int ndquots;
677 ndquots = BBTOB(nbblks);
678 do_div(ndquots, sizeof(xfs_dqblk_t));
684 * This initializes all the quota information that's kept in the
688 xfs_qm_init_quotainfo(
691 xfs_quotainfo_t *qinf;
695 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
697 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
700 * See if quotainodes are setup, and if not, allocate them,
701 * and change the superblock accordingly.
703 if ((error = xfs_qm_init_quotainos(mp))) {
705 mp->m_quotainfo = NULL;
709 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
710 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
711 INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
712 mutex_init(&qinf->qi_tree_lock);
714 INIT_LIST_HEAD(&qinf->qi_lru_list);
715 qinf->qi_lru_count = 0;
716 mutex_init(&qinf->qi_lru_lock);
718 /* mutex used to serialize quotaoffs */
719 mutex_init(&qinf->qi_quotaofflock);
721 /* Precalc some constants */
722 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
723 qinf->qi_dqperchunk = xfs_qm_calc_dquots_per_chunk(mp,
724 qinf->qi_dqchunklen);
726 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
729 * We try to get the limits from the superuser's limits fields.
730 * This is quite hacky, but it is standard quota practice.
732 * We look at the USR dquot with id == 0 first, but if user quotas
733 * are not enabled we goto the GRP dquot with id == 0.
734 * We don't really care to keep separate default limits for user
735 * and group quotas, at least not at this point.
737 * Since we may not have done a quotacheck by this point, just read
738 * the dquot without attaching it to any hashtables or lists.
740 error = xfs_qm_dqread(mp, 0,
741 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
742 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
744 XFS_QMOPT_DOWARN, &dqp);
746 xfs_disk_dquot_t *ddqp = &dqp->q_core;
749 * The warnings and timers set the grace period given to
750 * a user or group before he or she can not perform any
751 * more writing. If it is zero, a default is used.
753 qinf->qi_btimelimit = ddqp->d_btimer ?
754 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
755 qinf->qi_itimelimit = ddqp->d_itimer ?
756 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
757 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
758 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
759 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
760 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
761 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
762 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
763 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
764 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
765 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
766 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
767 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
768 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
769 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
770 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
772 xfs_qm_dqdestroy(dqp);
774 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
775 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
776 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
777 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
778 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
779 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
782 qinf->qi_shrinker.shrink = xfs_qm_shake;
783 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
784 register_shrinker(&qinf->qi_shrinker);
790 * Gets called when unmounting a filesystem or when all quotas get
792 * This purges the quota inodes, destroys locks and frees itself.
795 xfs_qm_destroy_quotainfo(
800 qi = mp->m_quotainfo;
803 unregister_shrinker(&qi->qi_shrinker);
805 if (qi->qi_uquotaip) {
806 IRELE(qi->qi_uquotaip);
807 qi->qi_uquotaip = NULL; /* paranoia */
809 if (qi->qi_gquotaip) {
810 IRELE(qi->qi_gquotaip);
811 qi->qi_gquotaip = NULL;
813 if (qi->qi_pquotaip) {
814 IRELE(qi->qi_pquotaip);
815 qi->qi_pquotaip = NULL;
817 mutex_destroy(&qi->qi_quotaofflock);
819 mp->m_quotainfo = NULL;
823 * Create an inode and return with a reference already taken, but unlocked
824 * This is how we create quota inodes
839 * With superblock that doesn't have separate pquotino, we
840 * share an inode between gquota and pquota. If the on-disk
841 * superblock has GQUOTA and the filesystem is now mounted
842 * with PQUOTA, just use sb_gquotino for sb_pquotino and
845 if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
846 (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
847 xfs_ino_t ino = NULLFSINO;
849 if ((flags & XFS_QMOPT_PQUOTA) &&
850 (mp->m_sb.sb_gquotino != NULLFSINO)) {
851 ino = mp->m_sb.sb_gquotino;
852 ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
853 } else if ((flags & XFS_QMOPT_GQUOTA) &&
854 (mp->m_sb.sb_pquotino != NULLFSINO)) {
855 ino = mp->m_sb.sb_pquotino;
856 ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
858 if (ino != NULLFSINO) {
859 error = xfs_iget(mp, NULL, ino, 0, 0, ip);
862 mp->m_sb.sb_gquotino = NULLFSINO;
863 mp->m_sb.sb_pquotino = NULLFSINO;
867 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
868 if ((error = xfs_trans_reserve(tp,
869 XFS_QM_QINOCREATE_SPACE_RES(mp),
870 XFS_CREATE_LOG_RES(mp), 0,
871 XFS_TRANS_PERM_LOG_RES,
872 XFS_CREATE_LOG_COUNT))) {
873 xfs_trans_cancel(tp, 0);
878 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
881 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
888 * Make the changes in the superblock, and log those too.
889 * sbfields arg may contain fields other than *QUOTINO;
890 * VERSIONNUM for example.
892 spin_lock(&mp->m_sb_lock);
893 if (flags & XFS_QMOPT_SBVERSION) {
894 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
895 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
896 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS)) ==
897 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
898 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
901 xfs_sb_version_addquota(&mp->m_sb);
902 mp->m_sb.sb_uquotino = NULLFSINO;
903 mp->m_sb.sb_gquotino = NULLFSINO;
904 mp->m_sb.sb_pquotino = NULLFSINO;
906 /* qflags will get updated fully _after_ quotacheck */
907 mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
909 if (flags & XFS_QMOPT_UQUOTA)
910 mp->m_sb.sb_uquotino = (*ip)->i_ino;
911 else if (flags & XFS_QMOPT_GQUOTA)
912 mp->m_sb.sb_gquotino = (*ip)->i_ino;
914 mp->m_sb.sb_pquotino = (*ip)->i_ino;
915 spin_unlock(&mp->m_sb_lock);
916 xfs_mod_sb(tp, sbfields);
918 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
919 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
927 xfs_qm_reset_dqcounts(
933 struct xfs_dqblk *dqb;
936 trace_xfs_reset_dqcounts(bp, _RET_IP_);
939 * Reset all counters and timers. They'll be
940 * started afresh by xfs_qm_quotacheck.
943 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
944 do_div(j, sizeof(xfs_dqblk_t));
945 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
948 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
949 struct xfs_disk_dquot *ddq;
951 ddq = (struct xfs_disk_dquot *)&dqb[j];
954 * Do a sanity check, and if needed, repair the dqblk. Don't
955 * output any warnings because it's perfectly possible to
956 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
958 (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
970 if (xfs_sb_version_hascrc(&mp->m_sb)) {
971 xfs_update_cksum((char *)&dqb[j],
972 sizeof(struct xfs_dqblk),
980 struct xfs_mount *mp,
983 xfs_filblks_t blkcnt,
985 struct list_head *buffer_list)
992 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
993 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
997 * Blkcnt arg can be a very big number, and might even be
998 * larger than the log itself. So, we have to break it up into
999 * manageable-sized transactions.
1000 * Note that we don't start a permanent transaction here; we might
1001 * not be able to get a log reservation for the whole thing up front,
1002 * and we don't really care to either, because we just discard
1003 * everything if we were to crash in the middle of this loop.
1006 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1007 XFS_FSB_TO_DADDR(mp, bno),
1008 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1009 &xfs_dquot_buf_ops);
1012 * CRC and validation errors will return a EFSCORRUPTED here. If
1013 * this occurs, re-read without CRC validation so that we can
1014 * repair the damage via xfs_qm_reset_dqcounts(). This process
1015 * will leave a trace in the log indicating corruption has
1018 if (error == EFSCORRUPTED) {
1019 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1020 XFS_FSB_TO_DADDR(mp, bno),
1021 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1028 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1029 xfs_buf_delwri_queue(bp, buffer_list);
1032 /* goto the next block. */
1034 firstid += mp->m_quotainfo->qi_dqperchunk;
1041 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1042 * caller supplied function for every chunk of dquots that we find.
1046 struct xfs_mount *mp,
1047 struct xfs_inode *qip,
1049 struct list_head *buffer_list)
1051 struct xfs_bmbt_irec *map;
1052 int i, nmaps; /* number of map entries */
1053 int error; /* return value */
1054 xfs_fileoff_t lblkno;
1055 xfs_filblks_t maxlblkcnt;
1057 xfs_fsblock_t rablkno;
1058 xfs_filblks_t rablkcnt;
1062 * This looks racy, but we can't keep an inode lock across a
1063 * trans_reserve. But, this gets called during quotacheck, and that
1064 * happens only at mount time which is single threaded.
1066 if (qip->i_d.di_nblocks == 0)
1069 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1072 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
1074 nmaps = XFS_DQITER_MAP_SIZE;
1076 * We aren't changing the inode itself. Just changing
1077 * some of its data. No new blocks are added here, and
1078 * the inode is never added to the transaction.
1080 xfs_ilock(qip, XFS_ILOCK_SHARED);
1081 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1083 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1087 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1088 for (i = 0; i < nmaps; i++) {
1089 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1090 ASSERT(map[i].br_blockcount);
1093 lblkno += map[i].br_blockcount;
1095 if (map[i].br_startblock == HOLESTARTBLOCK)
1098 firstid = (xfs_dqid_t) map[i].br_startoff *
1099 mp->m_quotainfo->qi_dqperchunk;
1101 * Do a read-ahead on the next extent.
1103 if ((i+1 < nmaps) &&
1104 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1105 rablkcnt = map[i+1].br_blockcount;
1106 rablkno = map[i+1].br_startblock;
1107 while (rablkcnt--) {
1108 xfs_buf_readahead(mp->m_ddev_targp,
1109 XFS_FSB_TO_DADDR(mp, rablkno),
1110 mp->m_quotainfo->qi_dqchunklen,
1116 * Iterate thru all the blks in the extent and
1117 * reset the counters of all the dquots inside them.
1119 error = xfs_qm_dqiter_bufs(mp, firstid,
1120 map[i].br_startblock,
1121 map[i].br_blockcount,
1122 flags, buffer_list);
1126 } while (nmaps > 0);
1134 * Called by dqusage_adjust in doing a quotacheck.
1136 * Given the inode, and a dquot id this updates both the incore dqout as well
1137 * as the buffer copy. This is so that once the quotacheck is done, we can
1138 * just log all the buffers, as opposed to logging numerous updates to
1139 * individual dquots.
1142 xfs_qm_quotacheck_dqadjust(
1143 struct xfs_inode *ip,
1149 struct xfs_mount *mp = ip->i_mount;
1150 struct xfs_dquot *dqp;
1153 error = xfs_qm_dqget(mp, ip, id, type,
1154 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1157 * Shouldn't be able to turn off quotas here.
1159 ASSERT(error != ESRCH);
1160 ASSERT(error != ENOENT);
1164 trace_xfs_dqadjust(dqp);
1167 * Adjust the inode count and the block count to reflect this inode's
1170 be64_add_cpu(&dqp->q_core.d_icount, 1);
1171 dqp->q_res_icount++;
1173 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1174 dqp->q_res_bcount += nblks;
1177 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1178 dqp->q_res_rtbcount += rtblks;
1182 * Set default limits, adjust timers (since we changed usages)
1184 * There are no timers for the default values set in the root dquot.
1186 if (dqp->q_core.d_id) {
1187 xfs_qm_adjust_dqlimits(mp, dqp);
1188 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1191 dqp->dq_flags |= XFS_DQ_DIRTY;
1199 xfs_qcnt_t *O_rtblks)
1201 xfs_filblks_t rtblks; /* total rt blks */
1202 xfs_extnum_t idx; /* extent record index */
1203 xfs_ifork_t *ifp; /* inode fork pointer */
1204 xfs_extnum_t nextents; /* number of extent entries */
1207 ASSERT(XFS_IS_REALTIME_INODE(ip));
1208 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1209 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1210 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1214 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1215 for (idx = 0; idx < nextents; idx++)
1216 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1217 *O_rtblks = (xfs_qcnt_t)rtblks;
1222 * callback routine supplied to bulkstat(). Given an inumber, find its
1223 * dquots and update them to account for resources taken by that inode.
1227 xfs_qm_dqusage_adjust(
1228 xfs_mount_t *mp, /* mount point for filesystem */
1229 xfs_ino_t ino, /* inode number to get data for */
1230 void __user *buffer, /* not used */
1231 int ubsize, /* not used */
1232 int *ubused, /* not used */
1233 int *res) /* result code value */
1236 xfs_qcnt_t nblks, rtblks = 0;
1239 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1242 * rootino must have its resources accounted for, not so with the quota
1245 if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1246 *res = BULKSTAT_RV_NOTHING;
1247 return XFS_ERROR(EINVAL);
1251 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1252 * interface expects the inode to be exclusively locked because that's
1253 * the case in all other instances. It's OK that we do this because
1254 * quotacheck is done only at mount time.
1256 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1258 *res = BULKSTAT_RV_NOTHING;
1262 ASSERT(ip->i_delayed_blks == 0);
1264 if (XFS_IS_REALTIME_INODE(ip)) {
1266 * Walk thru the extent list and count the realtime blocks.
1268 error = xfs_qm_get_rtblks(ip, &rtblks);
1273 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1276 * Add the (disk blocks and inode) resources occupied by this
1277 * inode to its dquots. We do this adjustment in the incore dquot,
1278 * and also copy the changes to its buffer.
1279 * We don't care about putting these changes in a transaction
1280 * envelope because if we crash in the middle of a 'quotacheck'
1281 * we have to start from the beginning anyway.
1282 * Once we're done, we'll log all the dquot bufs.
1284 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1285 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1287 if (XFS_IS_UQUOTA_ON(mp)) {
1288 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1289 XFS_DQ_USER, nblks, rtblks);
1294 if (XFS_IS_GQUOTA_ON(mp)) {
1295 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1296 XFS_DQ_GROUP, nblks, rtblks);
1301 if (XFS_IS_PQUOTA_ON(mp)) {
1302 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1303 XFS_DQ_PROJ, nblks, rtblks);
1308 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1310 *res = BULKSTAT_RV_DIDONE;
1314 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1316 *res = BULKSTAT_RV_GIVEUP;
1322 struct xfs_dquot *dqp,
1325 struct list_head *buffer_list = data;
1326 struct xfs_buf *bp = NULL;
1330 if (dqp->dq_flags & XFS_DQ_FREEING)
1332 if (!XFS_DQ_IS_DIRTY(dqp))
1336 error = xfs_qm_dqflush(dqp, &bp);
1340 xfs_buf_delwri_queue(bp, buffer_list);
1348 * Walk thru all the filesystem inodes and construct a consistent view
1349 * of the disk quota world. If the quotacheck fails, disable quotas.
1355 int done, count, error, error2;
1359 LIST_HEAD (buffer_list);
1360 struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip;
1361 struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip;
1362 struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip;
1369 ASSERT(uip || gip || pip);
1370 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1372 xfs_notice(mp, "Quotacheck needed: Please wait.");
1375 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1376 * their counters to zero. We need a clean slate.
1377 * We don't log our changes till later.
1380 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1384 flags |= XFS_UQUOTA_CHKD;
1388 error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1392 flags |= XFS_GQUOTA_CHKD;
1396 error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1400 flags |= XFS_PQUOTA_CHKD;
1405 * Iterate thru all the inodes in the file system,
1406 * adjusting the corresponding dquot counters in core.
1408 error = xfs_bulkstat(mp, &lastino, &count,
1409 xfs_qm_dqusage_adjust,
1410 structsz, NULL, &done);
1417 * We've made all the changes that we need to make incore. Flush them
1418 * down to disk buffers if everything was updated successfully.
1420 if (XFS_IS_UQUOTA_ON(mp)) {
1421 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1424 if (XFS_IS_GQUOTA_ON(mp)) {
1425 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1430 if (XFS_IS_PQUOTA_ON(mp)) {
1431 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1437 error2 = xfs_buf_delwri_submit(&buffer_list);
1442 * We can get this error if we couldn't do a dquot allocation inside
1443 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1444 * dirty dquots that might be cached, we just want to get rid of them
1445 * and turn quotaoff. The dquots won't be attached to any of the inodes
1446 * at this point (because we intentionally didn't in dqget_noattach).
1449 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1454 * If one type of quotas is off, then it will lose its
1455 * quotachecked status, since we won't be doing accounting for
1456 * that type anymore.
1458 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1459 mp->m_qflags |= flags;
1462 while (!list_empty(&buffer_list)) {
1463 struct xfs_buf *bp =
1464 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1465 list_del_init(&bp->b_list);
1471 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1474 * We must turn off quotas.
1476 ASSERT(mp->m_quotainfo != NULL);
1477 xfs_qm_destroy_quotainfo(mp);
1478 if (xfs_mount_reset_sbqflags(mp)) {
1480 "Quotacheck: Failed to reset quota flags.");
1483 xfs_notice(mp, "Quotacheck: Done.");
1488 * This is called after the superblock has been read in and we're ready to
1489 * iget the quota inodes.
1492 xfs_qm_init_quotainos(
1495 struct xfs_inode *uip = NULL;
1496 struct xfs_inode *gip = NULL;
1497 struct xfs_inode *pip = NULL;
1499 __int64_t sbflags = 0;
1502 ASSERT(mp->m_quotainfo);
1505 * Get the uquota and gquota inodes
1507 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1508 if (XFS_IS_UQUOTA_ON(mp) &&
1509 mp->m_sb.sb_uquotino != NULLFSINO) {
1510 ASSERT(mp->m_sb.sb_uquotino > 0);
1511 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1514 return XFS_ERROR(error);
1516 if (XFS_IS_GQUOTA_ON(mp) &&
1517 mp->m_sb.sb_gquotino != NULLFSINO) {
1518 ASSERT(mp->m_sb.sb_gquotino > 0);
1519 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1524 if (XFS_IS_PQUOTA_ON(mp) &&
1525 mp->m_sb.sb_pquotino != NULLFSINO) {
1526 ASSERT(mp->m_sb.sb_pquotino > 0);
1527 error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1533 flags |= XFS_QMOPT_SBVERSION;
1534 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1535 XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
1540 * Create the three inodes, if they don't exist already. The changes
1541 * made above will get added to a transaction and logged in one of
1542 * the qino_alloc calls below. If the device is readonly,
1543 * temporarily switch to read-write to do this.
1545 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1546 error = xfs_qm_qino_alloc(mp, &uip,
1547 sbflags | XFS_SB_UQUOTINO,
1548 flags | XFS_QMOPT_UQUOTA);
1552 flags &= ~XFS_QMOPT_SBVERSION;
1554 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1555 error = xfs_qm_qino_alloc(mp, &gip,
1556 sbflags | XFS_SB_GQUOTINO,
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 sbflags | XFS_SB_PQUOTINO,
1566 flags | XFS_QMOPT_PQUOTA);
1571 mp->m_quotainfo->qi_uquotaip = uip;
1572 mp->m_quotainfo->qi_gquotaip = gip;
1573 mp->m_quotainfo->qi_pquotaip = pip;
1584 return XFS_ERROR(error);
1589 struct xfs_dquot *dqp)
1591 struct xfs_mount *mp = dqp->q_mount;
1592 struct xfs_quotainfo *qi = mp->m_quotainfo;
1594 mutex_lock(&qi->qi_tree_lock);
1595 radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1596 be32_to_cpu(dqp->q_core.d_id));
1599 mutex_unlock(&qi->qi_tree_lock);
1601 xfs_qm_dqdestroy(dqp);
1605 xfs_qm_dqreclaim_one(
1606 struct xfs_dquot *dqp,
1607 struct list_head *buffer_list,
1608 struct list_head *dispose_list)
1610 struct xfs_mount *mp = dqp->q_mount;
1611 struct xfs_quotainfo *qi = mp->m_quotainfo;
1614 if (!xfs_dqlock_nowait(dqp))
1618 * This dquot has acquired a reference in the meantime remove it from
1619 * the freelist and try again.
1624 trace_xfs_dqreclaim_want(dqp);
1625 XFS_STATS_INC(xs_qm_dqwants);
1627 list_del_init(&dqp->q_lru);
1629 XFS_STATS_DEC(xs_qm_dquot_unused);
1634 * Try to grab the flush lock. If this dquot is in the process of
1635 * getting flushed to disk, we don't want to reclaim it.
1637 if (!xfs_dqflock_nowait(dqp))
1638 goto out_unlock_move_tail;
1640 if (XFS_DQ_IS_DIRTY(dqp)) {
1641 struct xfs_buf *bp = NULL;
1643 trace_xfs_dqreclaim_dirty(dqp);
1645 error = xfs_qm_dqflush(dqp, &bp);
1647 xfs_warn(mp, "%s: dquot %p flush failed",
1649 goto out_unlock_move_tail;
1652 xfs_buf_delwri_queue(bp, buffer_list);
1655 * Give the dquot another try on the freelist, as the
1656 * flushing will take some time.
1658 goto out_unlock_move_tail;
1663 * Prevent lookups now that we are past the point of no return.
1665 dqp->dq_flags |= XFS_DQ_FREEING;
1668 ASSERT(dqp->q_nrefs == 0);
1669 list_move_tail(&dqp->q_lru, dispose_list);
1671 XFS_STATS_DEC(xs_qm_dquot_unused);
1673 trace_xfs_dqreclaim_done(dqp);
1674 XFS_STATS_INC(xs_qm_dqreclaims);
1678 * Move the dquot to the tail of the list so that we don't spin on it.
1680 out_unlock_move_tail:
1683 list_move_tail(&dqp->q_lru, &qi->qi_lru_list);
1684 trace_xfs_dqreclaim_busy(dqp);
1685 XFS_STATS_INC(xs_qm_dqreclaim_misses);
1690 struct shrinker *shrink,
1691 struct shrink_control *sc)
1693 struct xfs_quotainfo *qi =
1694 container_of(shrink, struct xfs_quotainfo, qi_shrinker);
1695 int nr_to_scan = sc->nr_to_scan;
1696 LIST_HEAD (buffer_list);
1697 LIST_HEAD (dispose_list);
1698 struct xfs_dquot *dqp;
1701 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
1706 mutex_lock(&qi->qi_lru_lock);
1707 while (!list_empty(&qi->qi_lru_list)) {
1708 if (nr_to_scan-- <= 0)
1710 dqp = list_first_entry(&qi->qi_lru_list, struct xfs_dquot,
1712 xfs_qm_dqreclaim_one(dqp, &buffer_list, &dispose_list);
1714 mutex_unlock(&qi->qi_lru_lock);
1716 error = xfs_buf_delwri_submit(&buffer_list);
1718 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
1720 while (!list_empty(&dispose_list)) {
1721 dqp = list_first_entry(&dispose_list, struct xfs_dquot, q_lru);
1722 list_del_init(&dqp->q_lru);
1723 xfs_qm_dqfree_one(dqp);
1727 return (qi->qi_lru_count / 100) * sysctl_vfs_cache_pressure;
1731 * Start a transaction and write the incore superblock changes to
1732 * disk. flags parameter indicates which fields have changed.
1735 xfs_qm_write_sb_changes(
1742 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1743 error = xfs_trans_reserve(tp, 0, XFS_QM_SBCHANGE_LOG_RES(mp),
1744 0, 0, XFS_DEFAULT_LOG_COUNT);
1746 xfs_trans_cancel(tp, 0);
1750 xfs_mod_sb(tp, flags);
1751 error = xfs_trans_commit(tp, 0);
1757 /* --------------- utility functions for vnodeops ---------------- */
1761 * Given an inode, a uid, gid and prid make sure that we have
1762 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1763 * quotas by creating this file.
1764 * This also attaches dquot(s) to the given inode after locking it,
1765 * and returns the dquots corresponding to the uid and/or gid.
1767 * in : inode (unlocked)
1768 * out : udquot, gdquot with references taken and unlocked
1772 struct xfs_inode *ip,
1777 struct xfs_dquot **O_udqpp,
1778 struct xfs_dquot **O_gdqpp,
1779 struct xfs_dquot **O_pdqpp)
1781 struct xfs_mount *mp = ip->i_mount;
1782 struct xfs_dquot *uq = NULL;
1783 struct xfs_dquot *gq = NULL;
1784 struct xfs_dquot *pq = NULL;
1788 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1791 lockflags = XFS_ILOCK_EXCL;
1792 xfs_ilock(ip, lockflags);
1794 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1795 gid = ip->i_d.di_gid;
1798 * Attach the dquot(s) to this inode, doing a dquot allocation
1799 * if necessary. The dquot(s) will not be locked.
1801 if (XFS_NOT_DQATTACHED(mp, ip)) {
1802 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1804 xfs_iunlock(ip, lockflags);
1809 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1810 if (ip->i_d.di_uid != uid) {
1812 * What we need is the dquot that has this uid, and
1813 * if we send the inode to dqget, the uid of the inode
1814 * takes priority over what's sent in the uid argument.
1815 * We must unlock inode here before calling dqget if
1816 * we're not sending the inode, because otherwise
1817 * we'll deadlock by doing trans_reserve while
1820 xfs_iunlock(ip, lockflags);
1821 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
1827 ASSERT(error != ENOENT);
1831 * Get the ilock in the right order.
1834 lockflags = XFS_ILOCK_SHARED;
1835 xfs_ilock(ip, lockflags);
1838 * Take an extra reference, because we'll return
1841 ASSERT(ip->i_udquot);
1842 uq = xfs_qm_dqhold(ip->i_udquot);
1845 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1846 if (ip->i_d.di_gid != gid) {
1847 xfs_iunlock(ip, lockflags);
1848 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
1854 ASSERT(error != ENOENT);
1858 lockflags = XFS_ILOCK_SHARED;
1859 xfs_ilock(ip, lockflags);
1861 ASSERT(ip->i_gdquot);
1862 gq = xfs_qm_dqhold(ip->i_gdquot);
1865 if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1866 if (xfs_get_projid(ip) != prid) {
1867 xfs_iunlock(ip, lockflags);
1868 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1874 ASSERT(error != ENOENT);
1878 lockflags = XFS_ILOCK_SHARED;
1879 xfs_ilock(ip, lockflags);
1881 ASSERT(ip->i_pdquot);
1882 pq = xfs_qm_dqhold(ip->i_pdquot);
1886 trace_xfs_dquot_dqalloc(ip);
1888 xfs_iunlock(ip, lockflags);
1912 * Actually transfer ownership, and do dquot modifications.
1913 * These were already reserved.
1919 xfs_dquot_t **IO_olddq,
1922 xfs_dquot_t *prevdq;
1923 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1924 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1927 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1928 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1933 ASSERT(prevdq != newdq);
1935 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1936 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1938 /* the sparkling new dquot */
1939 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1940 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1943 * Take an extra reference, because the inode is going to keep
1944 * this dquot pointer even after the trans_commit.
1946 *IO_olddq = xfs_qm_dqhold(newdq);
1952 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1955 xfs_qm_vop_chown_reserve(
1956 struct xfs_trans *tp,
1957 struct xfs_inode *ip,
1958 struct xfs_dquot *udqp,
1959 struct xfs_dquot *gdqp,
1960 struct xfs_dquot *pdqp,
1963 struct xfs_mount *mp = ip->i_mount;
1964 uint delblks, blkflags, prjflags = 0;
1965 struct xfs_dquot *udq_unres = NULL;
1966 struct xfs_dquot *gdq_unres = NULL;
1967 struct xfs_dquot *pdq_unres = NULL;
1968 struct xfs_dquot *udq_delblks = NULL;
1969 struct xfs_dquot *gdq_delblks = NULL;
1970 struct xfs_dquot *pdq_delblks = NULL;
1974 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1975 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1977 delblks = ip->i_delayed_blks;
1978 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1979 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1981 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1982 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
1985 * If there are delayed allocation blocks, then we have to
1986 * unreserve those from the old dquot, and add them to the
1990 ASSERT(ip->i_udquot);
1991 udq_unres = ip->i_udquot;
1994 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1995 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1998 ASSERT(ip->i_gdquot);
1999 gdq_unres = ip->i_gdquot;
2003 if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
2004 xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
2005 prjflags = XFS_QMOPT_ENOSPC;
2008 ASSERT(ip->i_pdquot);
2009 pdq_unres = ip->i_pdquot;
2013 error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2014 udq_delblks, gdq_delblks, pdq_delblks,
2015 ip->i_d.di_nblocks, 1,
2016 flags | blkflags | prjflags);
2021 * Do the delayed blks reservations/unreservations now. Since, these
2022 * are done without the help of a transaction, if a reservation fails
2023 * its previous reservations won't be automatically undone by trans
2024 * code. So, we have to do it manually here.
2028 * Do the reservations first. Unreservation can't fail.
2030 ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
2031 ASSERT(udq_unres || gdq_unres || pdq_unres);
2032 error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2033 udq_delblks, gdq_delblks, pdq_delblks,
2034 (xfs_qcnt_t)delblks, 0,
2035 flags | blkflags | prjflags);
2038 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2039 udq_unres, gdq_unres, pdq_unres,
2040 -((xfs_qcnt_t)delblks), 0, blkflags);
2047 xfs_qm_vop_rename_dqattach(
2048 struct xfs_inode **i_tab)
2050 struct xfs_mount *mp = i_tab[0]->i_mount;
2053 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2056 for (i = 0; (i < 4 && i_tab[i]); i++) {
2057 struct xfs_inode *ip = i_tab[i];
2061 * Watch out for duplicate entries in the table.
2063 if (i == 0 || ip != i_tab[i-1]) {
2064 if (XFS_NOT_DQATTACHED(mp, ip)) {
2065 error = xfs_qm_dqattach(ip, 0);
2075 xfs_qm_vop_create_dqattach(
2076 struct xfs_trans *tp,
2077 struct xfs_inode *ip,
2078 struct xfs_dquot *udqp,
2079 struct xfs_dquot *gdqp,
2080 struct xfs_dquot *pdqp)
2082 struct xfs_mount *mp = tp->t_mountp;
2084 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2087 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2088 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2091 ASSERT(ip->i_udquot == NULL);
2092 ASSERT(XFS_IS_UQUOTA_ON(mp));
2093 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
2095 ip->i_udquot = xfs_qm_dqhold(udqp);
2096 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2099 ASSERT(ip->i_gdquot == NULL);
2100 ASSERT(XFS_IS_GQUOTA_ON(mp));
2101 ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
2102 ip->i_gdquot = xfs_qm_dqhold(gdqp);
2103 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2106 ASSERT(ip->i_pdquot == NULL);
2107 ASSERT(XFS_IS_PQUOTA_ON(mp));
2108 ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
2110 ip->i_pdquot = xfs_qm_dqhold(pdqp);
2111 xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);