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
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"
41 #include "xfs_utils.h"
43 #include "xfs_trace.h"
46 * The global quota manager. There is only one of these for the entire
47 * system, _not_ one per file system. XQM keeps track of the overall
48 * quota functionality, including maintaining the freelist and hash
51 struct mutex xfs_Gqm_lock;
52 struct xfs_qm *xfs_Gqm;
54 kmem_zone_t *qm_dqzone;
55 kmem_zone_t *qm_dqtrxzone;
57 STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int);
58 STATIC void xfs_qm_list_destroy(xfs_dqlist_t *);
60 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
61 STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
62 STATIC int xfs_qm_shake(struct shrinker *, struct shrink_control *);
64 static struct shrinker xfs_qm_shaker = {
65 .shrink = xfs_qm_shake,
66 .seeks = DEFAULT_SEEKS,
70 * Initialize the XQM structure.
71 * Note that there is not one quota manager per file system.
73 STATIC struct xfs_qm *
76 xfs_dqhash_t *udqhash, *gdqhash;
82 * Initialize the dquot hash tables.
84 udqhash = kmem_zalloc_greedy(&hsize,
85 XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t),
86 XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t));
90 gdqhash = kmem_zalloc_large(hsize);
92 goto out_free_udqhash;
94 hsize /= sizeof(xfs_dqhash_t);
96 xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
97 xqm->qm_dqhashmask = hsize - 1;
98 xqm->qm_usr_dqhtable = udqhash;
99 xqm->qm_grp_dqhtable = gdqhash;
100 ASSERT(xqm->qm_usr_dqhtable != NULL);
101 ASSERT(xqm->qm_grp_dqhtable != NULL);
103 for (i = 0; i < hsize; i++) {
104 xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i);
105 xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i);
109 * Freelist of all dquots of all file systems
111 INIT_LIST_HEAD(&xqm->qm_dqfrlist);
112 xqm->qm_dqfrlist_cnt = 0;
113 mutex_init(&xqm->qm_dqfrlist_lock);
116 * dquot zone. we register our own low-memory callback.
119 xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t),
121 qm_dqzone = xqm->qm_dqzone;
123 xqm->qm_dqzone = qm_dqzone;
125 register_shrinker(&xfs_qm_shaker);
128 * The t_dqinfo portion of transactions.
131 xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t),
133 qm_dqtrxzone = xqm->qm_dqtrxzone;
135 xqm->qm_dqtrxzone = qm_dqtrxzone;
137 atomic_set(&xqm->qm_totaldquots, 0);
142 kmem_free_large(udqhash);
148 * Destroy the global quota manager when its reference count goes to zero.
157 ASSERT(xqm->qm_nrefs == 0);
159 unregister_shrinker(&xfs_qm_shaker);
161 mutex_lock(&xqm->qm_dqfrlist_lock);
162 ASSERT(list_empty(&xqm->qm_dqfrlist));
163 mutex_unlock(&xqm->qm_dqfrlist_lock);
165 hsize = xqm->qm_dqhashmask + 1;
166 for (i = 0; i < hsize; i++) {
167 xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
168 xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
170 kmem_free_large(xqm->qm_usr_dqhtable);
171 kmem_free_large(xqm->qm_grp_dqhtable);
172 xqm->qm_usr_dqhtable = NULL;
173 xqm->qm_grp_dqhtable = NULL;
174 xqm->qm_dqhashmask = 0;
180 * Called at mount time to let XQM know that another file system is
181 * starting quotas. This isn't crucial information as the individual mount
182 * structures are pretty independent, but it helps the XQM keep a
183 * global view of what's going on.
187 xfs_qm_hold_quotafs_ref(
188 struct xfs_mount *mp)
191 * Need to lock the xfs_Gqm structure for things like this. For example,
192 * the structure could disappear between the entry to this routine and
193 * a HOLD operation if not locked.
195 mutex_lock(&xfs_Gqm_lock);
198 xfs_Gqm = xfs_Gqm_init();
200 mutex_unlock(&xfs_Gqm_lock);
206 * We can keep a list of all filesystems with quotas mounted for
207 * debugging and statistical purposes, but ...
208 * Just take a reference and get out.
211 mutex_unlock(&xfs_Gqm_lock);
218 * Release the reference that a filesystem took at mount time,
219 * so that we know when we need to destroy the entire quota manager.
223 xfs_qm_rele_quotafs_ref(
224 struct xfs_mount *mp)
227 ASSERT(xfs_Gqm->qm_nrefs > 0);
230 * Destroy the entire XQM. If somebody mounts with quotaon, this'll
233 mutex_lock(&xfs_Gqm_lock);
234 if (--xfs_Gqm->qm_nrefs == 0) {
235 xfs_qm_destroy(xfs_Gqm);
238 mutex_unlock(&xfs_Gqm_lock);
242 * Just destroy the quotainfo structure.
246 struct xfs_mount *mp)
248 if (mp->m_quotainfo) {
249 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
250 xfs_qm_destroy_quotainfo(mp);
256 * This is called from xfs_mountfs to start quotas and initialize all
257 * necessary data structures like quotainfo. This is also responsible for
258 * running a quotacheck as necessary. We are guaranteed that the superblock
259 * is consistently read in at this point.
261 * If we fail here, the mount will continue with quota turned off. We don't
262 * need to inidicate success or failure at all.
272 * If quotas on realtime volumes is not supported, we disable
273 * quotas immediately.
275 if (mp->m_sb.sb_rextents) {
276 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
281 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
284 * Allocate the quotainfo structure inside the mount struct, and
285 * create quotainode(s), and change/rev superblock if necessary.
287 error = xfs_qm_init_quotainfo(mp);
290 * We must turn off quotas.
292 ASSERT(mp->m_quotainfo == NULL);
297 * If any of the quotas are not consistent, do a quotacheck.
299 if (XFS_QM_NEED_QUOTACHECK(mp)) {
300 error = xfs_qm_quotacheck(mp);
302 /* Quotacheck failed and disabled quotas. */
307 * If one type of quotas is off, then it will lose its
308 * quotachecked status, since we won't be doing accounting for
311 if (!XFS_IS_UQUOTA_ON(mp))
312 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
313 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
314 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
318 * We actually don't have to acquire the m_sb_lock at all.
319 * This can only be called from mount, and that's single threaded. XXX
321 spin_lock(&mp->m_sb_lock);
322 sbf = mp->m_sb.sb_qflags;
323 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
324 spin_unlock(&mp->m_sb_lock);
326 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
327 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
329 * We could only have been turning quotas off.
330 * We aren't in very good shape actually because
331 * the incore structures are convinced that quotas are
332 * off, but the on disk superblock doesn't know that !
334 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
335 xfs_alert(mp, "%s: Superblock update failed!",
341 xfs_warn(mp, "Failed to initialize disk quotas.");
347 * Called from the vfsops layer.
350 xfs_qm_unmount_quotas(
354 * Release the dquots that root inode, et al might be holding,
355 * before we flush quotas and blow away the quotainfo structure.
357 ASSERT(mp->m_rootip);
358 xfs_qm_dqdetach(mp->m_rootip);
360 xfs_qm_dqdetach(mp->m_rbmip);
362 xfs_qm_dqdetach(mp->m_rsumip);
365 * Release the quota inodes.
367 if (mp->m_quotainfo) {
368 if (mp->m_quotainfo->qi_uquotaip) {
369 IRELE(mp->m_quotainfo->qi_uquotaip);
370 mp->m_quotainfo->qi_uquotaip = NULL;
372 if (mp->m_quotainfo->qi_gquotaip) {
373 IRELE(mp->m_quotainfo->qi_gquotaip);
374 mp->m_quotainfo->qi_gquotaip = NULL;
380 * Flush all dquots of the given file system to disk. The dquots are
381 * _not_ purged from memory here, just their data written to disk.
385 struct xfs_mount *mp)
387 struct xfs_quotainfo *q = mp->m_quotainfo;
389 struct xfs_dquot *dqp;
395 mutex_lock(&q->qi_dqlist_lock);
396 list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
398 if ((dqp->dq_flags & XFS_DQ_FREEING) ||
399 !XFS_DQ_IS_DIRTY(dqp)) {
404 /* XXX a sentinel would be better */
405 recl = q->qi_dqreclaims;
406 if (!xfs_dqflock_nowait(dqp)) {
408 * If we can't grab the flush lock then check
409 * to see if the dquot has been flushed delayed
410 * write. If so, grab its buffer and send it
411 * out immediately. We'll be able to acquire
412 * the flush lock when the I/O completes.
414 xfs_dqflock_pushbuf_wait(dqp);
417 * Let go of the mplist lock. We don't want to hold it
418 * across a disk write.
420 mutex_unlock(&q->qi_dqlist_lock);
421 error = xfs_qm_dqflush(dqp, 0);
426 mutex_lock(&q->qi_dqlist_lock);
427 if (recl != q->qi_dqreclaims) {
428 mutex_unlock(&q->qi_dqlist_lock);
429 /* XXX restart limit */
434 mutex_unlock(&q->qi_dqlist_lock);
440 * Release the group dquot pointers the user dquots may be
441 * carrying around as a hint. mplist is locked on entry and exit.
444 xfs_qm_detach_gdquots(
445 struct xfs_mount *mp)
447 struct xfs_quotainfo *q = mp->m_quotainfo;
448 struct xfs_dquot *dqp, *gdqp;
451 ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
452 list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
454 if (dqp->dq_flags & XFS_DQ_FREEING) {
456 mutex_unlock(&q->qi_dqlist_lock);
458 mutex_lock(&q->qi_dqlist_lock);
462 gdqp = dqp->q_gdquot;
464 dqp->q_gdquot = NULL;
473 * Go through all the incore dquots of this file system and take them
474 * off the mplist and hashlist, if the dquot type matches the dqtype
475 * parameter. This is used when turning off quota accounting for
476 * users and/or groups, as well as when the filesystem is unmounting.
480 struct xfs_mount *mp,
483 struct xfs_quotainfo *q = mp->m_quotainfo;
484 struct xfs_dquot *dqp, *n;
487 LIST_HEAD (dispose_list);
492 dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
493 dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0;
494 dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
496 mutex_lock(&q->qi_dqlist_lock);
499 * In the first pass through all incore dquots of this filesystem,
500 * we release the group dquot pointers the user dquots may be
501 * carrying around as a hint. We need to do this irrespective of
502 * what's being turned off.
504 xfs_qm_detach_gdquots(mp);
507 * Try to get rid of all of the unwanted dquots.
509 list_for_each_entry_safe(dqp, n, &q->qi_dqlist, q_mplist) {
511 if ((dqp->dq_flags & dqtype) != 0 &&
512 !(dqp->dq_flags & XFS_DQ_FREEING)) {
513 if (dqp->q_nrefs == 0) {
514 dqp->dq_flags |= XFS_DQ_FREEING;
515 list_move_tail(&dqp->q_mplist, &dispose_list);
521 mutex_unlock(&q->qi_dqlist_lock);
523 list_for_each_entry_safe(dqp, n, &dispose_list, q_mplist)
537 * Purge the dquot cache.
538 * None of the dquots should really be busy at this point.
540 if (mp->m_quotainfo) {
541 while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
554 xfs_dquot_t *udqhint, /* hint */
555 xfs_dquot_t **IO_idqpp)
560 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
564 * See if we already have it in the inode itself. IO_idqpp is
565 * &i_udquot or &i_gdquot. This made the code look weird, but
566 * made the logic a lot simpler.
570 trace_xfs_dqattach_found(dqp);
575 * udqhint is the i_udquot field in inode, and is non-NULL only
576 * when the type arg is group/project. Its purpose is to save a
577 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
581 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
585 * No need to take dqlock to look at the id.
587 * The ID can't change until it gets reclaimed, and it won't
588 * be reclaimed as long as we have a ref from inode and we
591 dqp = udqhint->q_gdquot;
592 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
593 ASSERT(*IO_idqpp == NULL);
595 *IO_idqpp = xfs_qm_dqhold(dqp);
596 xfs_dqunlock(udqhint);
601 * We can't hold a dquot lock when we call the dqget code.
602 * We'll deadlock in no time, because of (not conforming to)
603 * lock ordering - the inodelock comes before any dquot lock,
604 * and we may drop and reacquire the ilock in xfs_qm_dqget().
606 xfs_dqunlock(udqhint);
610 * Find the dquot from somewhere. This bumps the
611 * reference count of dquot and returns it locked.
612 * This can return ENOENT if dquot didn't exist on
613 * disk and we didn't ask it to allocate;
614 * ESRCH if quotas got turned off suddenly.
616 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
617 doalloc | XFS_QMOPT_DOWARN, &dqp);
621 trace_xfs_dqattach_get(dqp);
624 * dqget may have dropped and re-acquired the ilock, but it guarantees
625 * that the dquot returned is the one that should go in the inode.
634 * Given a udquot and gdquot, attach a ptr to the group dquot in the
635 * udquot as a hint for future lookups.
638 xfs_qm_dqattach_grouphint(
651 udq->q_gdquot = NULL;
655 udq->q_gdquot = xfs_qm_dqhold(gdq);
662 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
664 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
665 * Inode may get unlocked and relocked in here, and the caller must deal with
669 xfs_qm_dqattach_locked(
673 xfs_mount_t *mp = ip->i_mount;
677 if (!XFS_IS_QUOTA_RUNNING(mp) ||
678 !XFS_IS_QUOTA_ON(mp) ||
679 !XFS_NOT_DQATTACHED(mp, ip) ||
680 ip->i_ino == mp->m_sb.sb_uquotino ||
681 ip->i_ino == mp->m_sb.sb_gquotino)
684 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
686 if (XFS_IS_UQUOTA_ON(mp)) {
687 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
688 flags & XFS_QMOPT_DQALLOC,
689 NULL, &ip->i_udquot);
695 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
696 if (XFS_IS_OQUOTA_ON(mp)) {
697 error = XFS_IS_GQUOTA_ON(mp) ?
698 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
699 flags & XFS_QMOPT_DQALLOC,
700 ip->i_udquot, &ip->i_gdquot) :
701 xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
702 flags & XFS_QMOPT_DQALLOC,
703 ip->i_udquot, &ip->i_gdquot);
705 * Don't worry about the udquot that we may have
706 * attached above. It'll get detached, if not already.
714 * Attach this group quota to the user quota as a hint.
715 * This WON'T, in general, result in a thrash.
718 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
719 ASSERT(ip->i_udquot);
720 ASSERT(ip->i_gdquot);
723 * We do not have i_udquot locked at this point, but this check
724 * is OK since we don't depend on the i_gdquot to be accurate
725 * 100% all the time. It is just a hint, and this will
726 * succeed in general.
728 if (ip->i_udquot->q_gdquot != ip->i_gdquot)
729 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
735 if (XFS_IS_UQUOTA_ON(mp))
736 ASSERT(ip->i_udquot);
737 if (XFS_IS_OQUOTA_ON(mp))
738 ASSERT(ip->i_gdquot);
740 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
747 struct xfs_inode *ip,
752 xfs_ilock(ip, XFS_ILOCK_EXCL);
753 error = xfs_qm_dqattach_locked(ip, flags);
754 xfs_iunlock(ip, XFS_ILOCK_EXCL);
760 * Release dquots (and their references) if any.
761 * The inode should be locked EXCL except when this's called by
768 if (!(ip->i_udquot || ip->i_gdquot))
771 trace_xfs_dquot_dqdetach(ip);
773 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
774 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
776 xfs_qm_dqrele(ip->i_udquot);
780 xfs_qm_dqrele(ip->i_gdquot);
786 * The hash chains and the mplist use the same xfs_dqhash structure as
787 * their list head, but we can take the mplist qh_lock and one of the
788 * hash qh_locks at the same time without any problem as they aren't
791 static struct lock_class_key xfs_quota_mplist_class;
794 * This initializes all the quota information that's kept in the
798 xfs_qm_init_quotainfo(
801 xfs_quotainfo_t *qinf;
805 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
808 * Tell XQM that we exist as soon as possible.
810 if ((error = xfs_qm_hold_quotafs_ref(mp))) {
814 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
817 * See if quotainodes are setup, and if not, allocate them,
818 * and change the superblock accordingly.
820 if ((error = xfs_qm_init_quotainos(mp))) {
822 mp->m_quotainfo = NULL;
826 INIT_LIST_HEAD(&qinf->qi_dqlist);
827 mutex_init(&qinf->qi_dqlist_lock);
828 lockdep_set_class(&qinf->qi_dqlist_lock, &xfs_quota_mplist_class);
830 qinf->qi_dqreclaims = 0;
832 /* mutex used to serialize quotaoffs */
833 mutex_init(&qinf->qi_quotaofflock);
835 /* Precalc some constants */
836 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
837 ASSERT(qinf->qi_dqchunklen);
838 qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
839 do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
841 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
844 * We try to get the limits from the superuser's limits fields.
845 * This is quite hacky, but it is standard quota practice.
847 * We look at the USR dquot with id == 0 first, but if user quotas
848 * are not enabled we goto the GRP dquot with id == 0.
849 * We don't really care to keep separate default limits for user
850 * and group quotas, at least not at this point.
852 * Since we may not have done a quotacheck by this point, just read
853 * the dquot without attaching it to any hashtables or lists.
855 error = xfs_qm_dqread(mp, 0,
856 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
857 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
859 XFS_QMOPT_DOWARN, &dqp);
861 xfs_disk_dquot_t *ddqp = &dqp->q_core;
864 * The warnings and timers set the grace period given to
865 * a user or group before he or she can not perform any
866 * more writing. If it is zero, a default is used.
868 qinf->qi_btimelimit = ddqp->d_btimer ?
869 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
870 qinf->qi_itimelimit = ddqp->d_itimer ?
871 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
872 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
873 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
874 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
875 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
876 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
877 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
878 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
879 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
880 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
881 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
882 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
883 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
884 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
885 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
887 xfs_qm_dqdestroy(dqp);
889 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
890 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
891 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
892 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
893 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
894 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
902 * Gets called when unmounting a filesystem or when all quotas get
904 * This purges the quota inodes, destroys locks and frees itself.
907 xfs_qm_destroy_quotainfo(
912 qi = mp->m_quotainfo;
914 ASSERT(xfs_Gqm != NULL);
917 * Release the reference that XQM kept, so that we know
918 * when the XQM structure should be freed. We cannot assume
919 * that xfs_Gqm is non-null after this point.
921 xfs_qm_rele_quotafs_ref(mp);
923 ASSERT(list_empty(&qi->qi_dqlist));
924 mutex_destroy(&qi->qi_dqlist_lock);
926 if (qi->qi_uquotaip) {
927 IRELE(qi->qi_uquotaip);
928 qi->qi_uquotaip = NULL; /* paranoia */
930 if (qi->qi_gquotaip) {
931 IRELE(qi->qi_gquotaip);
932 qi->qi_gquotaip = NULL;
934 mutex_destroy(&qi->qi_quotaofflock);
936 mp->m_quotainfo = NULL;
941 /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
950 mutex_init(&list->qh_lock);
951 INIT_LIST_HEAD(&list->qh_list);
952 list->qh_version = 0;
960 mutex_destroy(&(list->qh_lock));
964 * Create an inode and return with a reference already taken, but unlocked
965 * This is how we create quota inodes
978 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
979 if ((error = xfs_trans_reserve(tp,
980 XFS_QM_QINOCREATE_SPACE_RES(mp),
981 XFS_CREATE_LOG_RES(mp), 0,
982 XFS_TRANS_PERM_LOG_RES,
983 XFS_CREATE_LOG_COUNT))) {
984 xfs_trans_cancel(tp, 0);
988 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip, &committed);
990 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
996 * Make the changes in the superblock, and log those too.
997 * sbfields arg may contain fields other than *QUOTINO;
998 * VERSIONNUM for example.
1000 spin_lock(&mp->m_sb_lock);
1001 if (flags & XFS_QMOPT_SBVERSION) {
1002 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
1003 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1004 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
1005 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1006 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
1008 xfs_sb_version_addquota(&mp->m_sb);
1009 mp->m_sb.sb_uquotino = NULLFSINO;
1010 mp->m_sb.sb_gquotino = NULLFSINO;
1012 /* qflags will get updated _after_ quotacheck */
1013 mp->m_sb.sb_qflags = 0;
1015 if (flags & XFS_QMOPT_UQUOTA)
1016 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1018 mp->m_sb.sb_gquotino = (*ip)->i_ino;
1019 spin_unlock(&mp->m_sb_lock);
1020 xfs_mod_sb(tp, sbfields);
1022 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
1023 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
1031 xfs_qm_reset_dqcounts(
1037 xfs_disk_dquot_t *ddq;
1040 trace_xfs_reset_dqcounts(bp, _RET_IP_);
1043 * Reset all counters and timers. They'll be
1044 * started afresh by xfs_qm_quotacheck.
1047 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1048 do_div(j, sizeof(xfs_dqblk_t));
1049 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
1052 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
1054 * Do a sanity check, and if needed, repair the dqblk. Don't
1055 * output any warnings because it's perfectly possible to
1056 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
1058 (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1062 ddq->d_rtbcount = 0;
1065 ddq->d_rtbtimer = 0;
1068 ddq->d_rtbwarns = 0;
1069 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
1078 xfs_filblks_t blkcnt,
1086 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1087 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
1091 * Blkcnt arg can be a very big number, and might even be
1092 * larger than the log itself. So, we have to break it up into
1093 * manageable-sized transactions.
1094 * Note that we don't start a permanent transaction here; we might
1095 * not be able to get a log reservation for the whole thing up front,
1096 * and we don't really care to either, because we just discard
1097 * everything if we were to crash in the middle of this loop.
1100 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1101 XFS_FSB_TO_DADDR(mp, bno),
1102 mp->m_quotainfo->qi_dqchunklen, 0, &bp);
1106 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1107 xfs_buf_delwri_queue(bp);
1110 * goto the next block.
1113 firstid += mp->m_quotainfo->qi_dqperchunk;
1119 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1120 * caller supplied function for every chunk of dquots that we find.
1128 xfs_bmbt_irec_t *map;
1129 int i, nmaps; /* number of map entries */
1130 int error; /* return value */
1131 xfs_fileoff_t lblkno;
1132 xfs_filblks_t maxlblkcnt;
1134 xfs_fsblock_t rablkno;
1135 xfs_filblks_t rablkcnt;
1139 * This looks racy, but we can't keep an inode lock across a
1140 * trans_reserve. But, this gets called during quotacheck, and that
1141 * happens only at mount time which is single threaded.
1143 if (qip->i_d.di_nblocks == 0)
1146 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1149 maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1151 nmaps = XFS_DQITER_MAP_SIZE;
1153 * We aren't changing the inode itself. Just changing
1154 * some of its data. No new blocks are added here, and
1155 * the inode is never added to the transaction.
1157 xfs_ilock(qip, XFS_ILOCK_SHARED);
1158 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1160 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1164 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1165 for (i = 0; i < nmaps; i++) {
1166 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1167 ASSERT(map[i].br_blockcount);
1170 lblkno += map[i].br_blockcount;
1172 if (map[i].br_startblock == HOLESTARTBLOCK)
1175 firstid = (xfs_dqid_t) map[i].br_startoff *
1176 mp->m_quotainfo->qi_dqperchunk;
1178 * Do a read-ahead on the next extent.
1180 if ((i+1 < nmaps) &&
1181 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1182 rablkcnt = map[i+1].br_blockcount;
1183 rablkno = map[i+1].br_startblock;
1184 while (rablkcnt--) {
1185 xfs_buf_readahead(mp->m_ddev_targp,
1186 XFS_FSB_TO_DADDR(mp, rablkno),
1187 mp->m_quotainfo->qi_dqchunklen);
1192 * Iterate thru all the blks in the extent and
1193 * reset the counters of all the dquots inside them.
1195 if ((error = xfs_qm_dqiter_bufs(mp,
1197 map[i].br_startblock,
1198 map[i].br_blockcount,
1206 } while (nmaps > 0);
1214 * Called by dqusage_adjust in doing a quotacheck.
1216 * Given the inode, and a dquot id this updates both the incore dqout as well
1217 * as the buffer copy. This is so that once the quotacheck is done, we can
1218 * just log all the buffers, as opposed to logging numerous updates to
1219 * individual dquots.
1222 xfs_qm_quotacheck_dqadjust(
1223 struct xfs_inode *ip,
1229 struct xfs_mount *mp = ip->i_mount;
1230 struct xfs_dquot *dqp;
1233 error = xfs_qm_dqget(mp, ip, id, type,
1234 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1237 * Shouldn't be able to turn off quotas here.
1239 ASSERT(error != ESRCH);
1240 ASSERT(error != ENOENT);
1244 trace_xfs_dqadjust(dqp);
1247 * Adjust the inode count and the block count to reflect this inode's
1250 be64_add_cpu(&dqp->q_core.d_icount, 1);
1251 dqp->q_res_icount++;
1253 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1254 dqp->q_res_bcount += nblks;
1257 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1258 dqp->q_res_rtbcount += rtblks;
1262 * Set default limits, adjust timers (since we changed usages)
1264 * There are no timers for the default values set in the root dquot.
1266 if (dqp->q_core.d_id) {
1267 xfs_qm_adjust_dqlimits(mp, &dqp->q_core);
1268 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1271 dqp->dq_flags |= XFS_DQ_DIRTY;
1279 xfs_qcnt_t *O_rtblks)
1281 xfs_filblks_t rtblks; /* total rt blks */
1282 xfs_extnum_t idx; /* extent record index */
1283 xfs_ifork_t *ifp; /* inode fork pointer */
1284 xfs_extnum_t nextents; /* number of extent entries */
1287 ASSERT(XFS_IS_REALTIME_INODE(ip));
1288 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1289 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1290 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1294 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1295 for (idx = 0; idx < nextents; idx++)
1296 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1297 *O_rtblks = (xfs_qcnt_t)rtblks;
1302 * callback routine supplied to bulkstat(). Given an inumber, find its
1303 * dquots and update them to account for resources taken by that inode.
1307 xfs_qm_dqusage_adjust(
1308 xfs_mount_t *mp, /* mount point for filesystem */
1309 xfs_ino_t ino, /* inode number to get data for */
1310 void __user *buffer, /* not used */
1311 int ubsize, /* not used */
1312 int *ubused, /* not used */
1313 int *res) /* result code value */
1316 xfs_qcnt_t nblks, rtblks = 0;
1319 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1322 * rootino must have its resources accounted for, not so with the quota
1325 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1326 *res = BULKSTAT_RV_NOTHING;
1327 return XFS_ERROR(EINVAL);
1331 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1332 * interface expects the inode to be exclusively locked because that's
1333 * the case in all other instances. It's OK that we do this because
1334 * quotacheck is done only at mount time.
1336 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1338 *res = BULKSTAT_RV_NOTHING;
1342 ASSERT(ip->i_delayed_blks == 0);
1344 if (XFS_IS_REALTIME_INODE(ip)) {
1346 * Walk thru the extent list and count the realtime blocks.
1348 error = xfs_qm_get_rtblks(ip, &rtblks);
1353 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1356 * Add the (disk blocks and inode) resources occupied by this
1357 * inode to its dquots. We do this adjustment in the incore dquot,
1358 * and also copy the changes to its buffer.
1359 * We don't care about putting these changes in a transaction
1360 * envelope because if we crash in the middle of a 'quotacheck'
1361 * we have to start from the beginning anyway.
1362 * Once we're done, we'll log all the dquot bufs.
1364 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1365 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1367 if (XFS_IS_UQUOTA_ON(mp)) {
1368 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1369 XFS_DQ_USER, nblks, rtblks);
1374 if (XFS_IS_GQUOTA_ON(mp)) {
1375 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1376 XFS_DQ_GROUP, nblks, rtblks);
1381 if (XFS_IS_PQUOTA_ON(mp)) {
1382 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1383 XFS_DQ_PROJ, nblks, rtblks);
1388 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1390 *res = BULKSTAT_RV_DIDONE;
1394 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1396 *res = BULKSTAT_RV_GIVEUP;
1401 * Walk thru all the filesystem inodes and construct a consistent view
1402 * of the disk quota world. If the quotacheck fails, disable quotas.
1408 int done, count, error;
1411 xfs_inode_t *uip, *gip;
1419 ASSERT(mp->m_quotainfo->qi_uquotaip || mp->m_quotainfo->qi_gquotaip);
1420 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1423 * There should be no cached dquots. The (simplistic) quotacheck
1424 * algorithm doesn't like that.
1426 ASSERT(list_empty(&mp->m_quotainfo->qi_dqlist));
1428 xfs_notice(mp, "Quotacheck needed: Please wait.");
1431 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1432 * their counters to zero. We need a clean slate.
1433 * We don't log our changes till later.
1435 uip = mp->m_quotainfo->qi_uquotaip;
1437 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA);
1440 flags |= XFS_UQUOTA_CHKD;
1443 gip = mp->m_quotainfo->qi_gquotaip;
1445 error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
1446 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1449 flags |= XFS_OQUOTA_CHKD;
1454 * Iterate thru all the inodes in the file system,
1455 * adjusting the corresponding dquot counters in core.
1457 error = xfs_bulkstat(mp, &lastino, &count,
1458 xfs_qm_dqusage_adjust,
1459 structsz, NULL, &done);
1466 * We've made all the changes that we need to make incore.
1467 * Flush them down to disk buffers if everything was updated
1471 error = xfs_qm_dqflush_all(mp);
1474 * We can get this error if we couldn't do a dquot allocation inside
1475 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1476 * dirty dquots that might be cached, we just want to get rid of them
1477 * and turn quotaoff. The dquots won't be attached to any of the inodes
1478 * at this point (because we intentionally didn't in dqget_noattach).
1481 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1486 * We didn't log anything, because if we crashed, we'll have to
1487 * start the quotacheck from scratch anyway. However, we must make
1488 * sure that our dquot changes are secure before we put the
1489 * quotacheck'd stamp on the superblock. So, here we do a synchronous
1492 xfs_flush_buftarg(mp->m_ddev_targp, 1);
1495 * If one type of quotas is off, then it will lose its
1496 * quotachecked status, since we won't be doing accounting for
1497 * that type anymore.
1499 mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
1500 mp->m_qflags |= flags;
1505 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1508 * We must turn off quotas.
1510 ASSERT(mp->m_quotainfo != NULL);
1511 ASSERT(xfs_Gqm != NULL);
1512 xfs_qm_destroy_quotainfo(mp);
1513 if (xfs_mount_reset_sbqflags(mp)) {
1515 "Quotacheck: Failed to reset quota flags.");
1518 xfs_notice(mp, "Quotacheck: Done.");
1523 * This is called after the superblock has been read in and we're ready to
1524 * iget the quota inodes.
1527 xfs_qm_init_quotainos(
1530 xfs_inode_t *uip, *gip;
1535 ASSERT(mp->m_quotainfo);
1541 * Get the uquota and gquota inodes
1543 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1544 if (XFS_IS_UQUOTA_ON(mp) &&
1545 mp->m_sb.sb_uquotino != NULLFSINO) {
1546 ASSERT(mp->m_sb.sb_uquotino > 0);
1547 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1549 return XFS_ERROR(error);
1551 if (XFS_IS_OQUOTA_ON(mp) &&
1552 mp->m_sb.sb_gquotino != NULLFSINO) {
1553 ASSERT(mp->m_sb.sb_gquotino > 0);
1554 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1558 return XFS_ERROR(error);
1562 flags |= XFS_QMOPT_SBVERSION;
1563 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1564 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
1568 * Create the two inodes, if they don't exist already. The changes
1569 * made above will get added to a transaction and logged in one of
1570 * the qino_alloc calls below. If the device is readonly,
1571 * temporarily switch to read-write to do this.
1573 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1574 if ((error = xfs_qm_qino_alloc(mp, &uip,
1575 sbflags | XFS_SB_UQUOTINO,
1576 flags | XFS_QMOPT_UQUOTA)))
1577 return XFS_ERROR(error);
1579 flags &= ~XFS_QMOPT_SBVERSION;
1581 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
1582 flags |= (XFS_IS_GQUOTA_ON(mp) ?
1583 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1584 error = xfs_qm_qino_alloc(mp, &gip,
1585 sbflags | XFS_SB_GQUOTINO, flags);
1590 return XFS_ERROR(error);
1594 mp->m_quotainfo->qi_uquotaip = uip;
1595 mp->m_quotainfo->qi_gquotaip = gip;
1602 struct xfs_dquot *dqp)
1604 struct xfs_mount *mp = dqp->q_mount;
1605 struct xfs_quotainfo *qi = mp->m_quotainfo;
1607 mutex_lock(&dqp->q_hash->qh_lock);
1608 list_del_init(&dqp->q_hashlist);
1609 dqp->q_hash->qh_version++;
1610 mutex_unlock(&dqp->q_hash->qh_lock);
1612 mutex_lock(&qi->qi_dqlist_lock);
1613 list_del_init(&dqp->q_mplist);
1615 qi->qi_dqreclaims++;
1616 mutex_unlock(&qi->qi_dqlist_lock);
1618 xfs_qm_dqdestroy(dqp);
1622 xfs_qm_dqreclaim_one(
1623 struct xfs_dquot *dqp,
1624 struct list_head *dispose_list)
1626 struct xfs_mount *mp = dqp->q_mount;
1629 if (!xfs_dqlock_nowait(dqp))
1633 * This dquot has acquired a reference in the meantime remove it from
1634 * the freelist and try again.
1639 trace_xfs_dqreclaim_want(dqp);
1640 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
1642 list_del_init(&dqp->q_freelist);
1643 xfs_Gqm->qm_dqfrlist_cnt--;
1647 ASSERT(dqp->q_hash);
1648 ASSERT(!list_empty(&dqp->q_mplist));
1651 * Try to grab the flush lock. If this dquot is in the process of
1652 * getting flushed to disk, we don't want to reclaim it.
1654 if (!xfs_dqflock_nowait(dqp))
1658 * We have the flush lock so we know that this is not in the
1659 * process of being flushed. So, if this is dirty, flush it
1660 * DELWRI so that we don't get a freelist infested with
1663 if (XFS_DQ_IS_DIRTY(dqp)) {
1664 trace_xfs_dqreclaim_dirty(dqp);
1667 * We flush it delayed write, so don't bother releasing the
1670 error = xfs_qm_dqflush(dqp, 0);
1672 xfs_warn(mp, "%s: dquot %p flush failed",
1677 * Give the dquot another try on the freelist, as the
1678 * flushing will take some time.
1685 * Prevent lookups now that we are past the point of no return.
1687 dqp->dq_flags |= XFS_DQ_FREEING;
1690 ASSERT(dqp->q_nrefs == 0);
1691 list_move_tail(&dqp->q_freelist, dispose_list);
1692 xfs_Gqm->qm_dqfrlist_cnt--;
1694 trace_xfs_dqreclaim_done(dqp);
1695 XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
1702 * Move the dquot to the tail of the list so that we don't spin on it.
1704 list_move_tail(&dqp->q_freelist, &xfs_Gqm->qm_dqfrlist);
1706 trace_xfs_dqreclaim_busy(dqp);
1707 XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
1712 struct shrinker *shrink,
1713 struct shrink_control *sc)
1715 int nr_to_scan = sc->nr_to_scan;
1716 LIST_HEAD (dispose_list);
1717 struct xfs_dquot *dqp;
1719 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
1724 mutex_lock(&xfs_Gqm->qm_dqfrlist_lock);
1725 while (!list_empty(&xfs_Gqm->qm_dqfrlist)) {
1726 if (nr_to_scan-- <= 0)
1728 dqp = list_first_entry(&xfs_Gqm->qm_dqfrlist, struct xfs_dquot,
1730 xfs_qm_dqreclaim_one(dqp, &dispose_list);
1732 mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
1734 while (!list_empty(&dispose_list)) {
1735 dqp = list_first_entry(&dispose_list, struct xfs_dquot,
1737 list_del_init(&dqp->q_freelist);
1738 xfs_qm_dqfree_one(dqp);
1741 return (xfs_Gqm->qm_dqfrlist_cnt / 100) * sysctl_vfs_cache_pressure;
1745 * Start a transaction and write the incore superblock changes to
1746 * disk. flags parameter indicates which fields have changed.
1749 xfs_qm_write_sb_changes(
1756 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1757 if ((error = xfs_trans_reserve(tp, 0,
1758 mp->m_sb.sb_sectsize + 128, 0,
1760 XFS_DEFAULT_LOG_COUNT))) {
1761 xfs_trans_cancel(tp, 0);
1765 xfs_mod_sb(tp, flags);
1766 error = xfs_trans_commit(tp, 0);
1772 /* --------------- utility functions for vnodeops ---------------- */
1776 * Given an inode, a uid, gid and prid make sure that we have
1777 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1778 * quotas by creating this file.
1779 * This also attaches dquot(s) to the given inode after locking it,
1780 * and returns the dquots corresponding to the uid and/or gid.
1782 * in : inode (unlocked)
1783 * out : udquot, gdquot with references taken and unlocked
1787 struct xfs_inode *ip,
1792 struct xfs_dquot **O_udqpp,
1793 struct xfs_dquot **O_gdqpp)
1795 struct xfs_mount *mp = ip->i_mount;
1796 struct xfs_dquot *uq, *gq;
1800 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1803 lockflags = XFS_ILOCK_EXCL;
1804 xfs_ilock(ip, lockflags);
1806 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1807 gid = ip->i_d.di_gid;
1810 * Attach the dquot(s) to this inode, doing a dquot allocation
1811 * if necessary. The dquot(s) will not be locked.
1813 if (XFS_NOT_DQATTACHED(mp, ip)) {
1814 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1816 xfs_iunlock(ip, lockflags);
1822 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1823 if (ip->i_d.di_uid != uid) {
1825 * What we need is the dquot that has this uid, and
1826 * if we send the inode to dqget, the uid of the inode
1827 * takes priority over what's sent in the uid argument.
1828 * We must unlock inode here before calling dqget if
1829 * we're not sending the inode, because otherwise
1830 * we'll deadlock by doing trans_reserve while
1833 xfs_iunlock(ip, lockflags);
1834 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
1839 ASSERT(error != ENOENT);
1843 * Get the ilock in the right order.
1846 lockflags = XFS_ILOCK_SHARED;
1847 xfs_ilock(ip, lockflags);
1850 * Take an extra reference, because we'll return
1853 ASSERT(ip->i_udquot);
1854 uq = xfs_qm_dqhold(ip->i_udquot);
1857 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1858 if (ip->i_d.di_gid != gid) {
1859 xfs_iunlock(ip, lockflags);
1860 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
1867 ASSERT(error != ENOENT);
1871 lockflags = XFS_ILOCK_SHARED;
1872 xfs_ilock(ip, lockflags);
1874 ASSERT(ip->i_gdquot);
1875 gq = xfs_qm_dqhold(ip->i_gdquot);
1877 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1878 if (xfs_get_projid(ip) != prid) {
1879 xfs_iunlock(ip, lockflags);
1880 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1887 ASSERT(error != ENOENT);
1891 lockflags = XFS_ILOCK_SHARED;
1892 xfs_ilock(ip, lockflags);
1894 ASSERT(ip->i_gdquot);
1895 gq = xfs_qm_dqhold(ip->i_gdquot);
1899 trace_xfs_dquot_dqalloc(ip);
1901 xfs_iunlock(ip, lockflags);
1914 * Actually transfer ownership, and do dquot modifications.
1915 * These were already reserved.
1921 xfs_dquot_t **IO_olddq,
1924 xfs_dquot_t *prevdq;
1925 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1926 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1929 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1930 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1935 ASSERT(prevdq != newdq);
1937 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1938 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1940 /* the sparkling new dquot */
1941 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1942 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1945 * Take an extra reference, because the inode is going to keep
1946 * this dquot pointer even after the trans_commit.
1948 *IO_olddq = xfs_qm_dqhold(newdq);
1954 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1957 xfs_qm_vop_chown_reserve(
1964 xfs_mount_t *mp = ip->i_mount;
1965 uint delblks, blkflags, prjflags = 0;
1966 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
1970 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1971 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1973 delblks = ip->i_delayed_blks;
1974 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
1975 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1976 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1978 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1979 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
1982 * If there are delayed allocation blocks, then we have to
1983 * unreserve those from the old dquot, and add them to the
1987 ASSERT(ip->i_udquot);
1988 unresudq = ip->i_udquot;
1991 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
1992 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
1993 xfs_get_projid(ip) != be32_to_cpu(gdqp->q_core.d_id))
1994 prjflags = XFS_QMOPT_ENOSPC;
1997 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
1998 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
2001 ASSERT(ip->i_gdquot);
2002 unresgdq = ip->i_gdquot;
2007 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2008 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
2009 flags | blkflags | prjflags)))
2013 * Do the delayed blks reservations/unreservations now. Since, these
2014 * are done without the help of a transaction, if a reservation fails
2015 * its previous reservations won't be automatically undone by trans
2016 * code. So, we have to do it manually here.
2020 * Do the reservations first. Unreservation can't fail.
2022 ASSERT(delblksudq || delblksgdq);
2023 ASSERT(unresudq || unresgdq);
2024 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2025 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
2026 flags | blkflags | prjflags)))
2028 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2029 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
2037 xfs_qm_vop_rename_dqattach(
2038 struct xfs_inode **i_tab)
2040 struct xfs_mount *mp = i_tab[0]->i_mount;
2043 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2046 for (i = 0; (i < 4 && i_tab[i]); i++) {
2047 struct xfs_inode *ip = i_tab[i];
2051 * Watch out for duplicate entries in the table.
2053 if (i == 0 || ip != i_tab[i-1]) {
2054 if (XFS_NOT_DQATTACHED(mp, ip)) {
2055 error = xfs_qm_dqattach(ip, 0);
2065 xfs_qm_vop_create_dqattach(
2066 struct xfs_trans *tp,
2067 struct xfs_inode *ip,
2068 struct xfs_dquot *udqp,
2069 struct xfs_dquot *gdqp)
2071 struct xfs_mount *mp = tp->t_mountp;
2073 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2076 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2077 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2080 ASSERT(ip->i_udquot == NULL);
2081 ASSERT(XFS_IS_UQUOTA_ON(mp));
2082 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
2084 ip->i_udquot = xfs_qm_dqhold(udqp);
2085 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2088 ASSERT(ip->i_gdquot == NULL);
2089 ASSERT(XFS_IS_OQUOTA_ON(mp));
2090 ASSERT((XFS_IS_GQUOTA_ON(mp) ?
2091 ip->i_d.di_gid : xfs_get_projid(ip)) ==
2092 be32_to_cpu(gdqp->q_core.d_id));
2094 ip->i_gdquot = xfs_qm_dqhold(gdqp);
2095 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);