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"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_btree.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_itable.h"
41 #include "xfs_rtalloc.h"
42 #include "xfs_error.h"
46 #include "xfs_buf_item.h"
47 #include "xfs_trans_space.h"
48 #include "xfs_utils.h"
50 #include "xfs_trace.h"
53 * The global quota manager. There is only one of these for the entire
54 * system, _not_ one per file system. XQM keeps track of the overall
55 * quota functionality, including maintaining the freelist and hash
58 struct mutex xfs_Gqm_lock;
59 struct xfs_qm *xfs_Gqm;
62 kmem_zone_t *qm_dqzone;
63 kmem_zone_t *qm_dqtrxzone;
65 static cred_t xfs_zerocr;
67 STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int);
68 STATIC void xfs_qm_list_destroy(xfs_dqlist_t *);
70 STATIC void xfs_qm_freelist_init(xfs_frlist_t *);
71 STATIC void xfs_qm_freelist_destroy(xfs_frlist_t *);
73 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
74 STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
75 STATIC int xfs_qm_shake(int, gfp_t);
77 static struct shrinker xfs_qm_shaker = {
78 .shrink = xfs_qm_shake,
79 .seeks = DEFAULT_SEEKS,
83 extern struct mutex qcheck_lock;
88 xfs_qm_dquot_list_print(
94 list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist_lock, qi_mplist) {
95 cmn_err(CE_DEBUG, " %d. \"%d (%s)\" "
96 "bcnt = %lld, icnt = %lld, refs = %d",
97 i++, be32_to_cpu(dqp->q_core.d_id),
98 DQFLAGTO_TYPESTR(dqp),
99 (long long)be64_to_cpu(dqp->q_core.d_bcount),
100 (long long)be64_to_cpu(dqp->q_core.d_icount),
105 static void xfs_qm_dquot_list_print(struct xfs_mount *mp) { }
109 * Initialize the XQM structure.
110 * Note that there is not one quota manager per file system.
112 STATIC struct xfs_qm *
115 xfs_dqhash_t *udqhash, *gdqhash;
121 * Initialize the dquot hash tables.
123 udqhash = kmem_zalloc_greedy(&hsize,
124 XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t),
125 XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t));
129 gdqhash = kmem_zalloc_large(hsize);
131 goto out_free_udqhash;
133 hsize /= sizeof(xfs_dqhash_t);
136 xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
137 xqm->qm_dqhashmask = hsize - 1;
138 xqm->qm_usr_dqhtable = udqhash;
139 xqm->qm_grp_dqhtable = gdqhash;
140 ASSERT(xqm->qm_usr_dqhtable != NULL);
141 ASSERT(xqm->qm_grp_dqhtable != NULL);
143 for (i = 0; i < hsize; i++) {
144 xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i);
145 xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i);
149 * Freelist of all dquots of all file systems
151 xfs_qm_freelist_init(&(xqm->qm_dqfreelist));
154 * dquot zone. we register our own low-memory callback.
157 xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t),
159 qm_dqzone = xqm->qm_dqzone;
161 xqm->qm_dqzone = qm_dqzone;
163 register_shrinker(&xfs_qm_shaker);
166 * The t_dqinfo portion of transactions.
169 xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t),
171 qm_dqtrxzone = xqm->qm_dqtrxzone;
173 xqm->qm_dqtrxzone = qm_dqtrxzone;
175 atomic_set(&xqm->qm_totaldquots, 0);
176 xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO;
179 mutex_init(&qcheck_lock);
184 kmem_free_large(udqhash);
190 * Destroy the global quota manager when its reference count goes to zero.
199 ASSERT(xqm->qm_nrefs == 0);
200 unregister_shrinker(&xfs_qm_shaker);
201 hsize = xqm->qm_dqhashmask + 1;
202 for (i = 0; i < hsize; i++) {
203 xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
204 xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
206 kmem_free_large(xqm->qm_usr_dqhtable);
207 kmem_free_large(xqm->qm_grp_dqhtable);
208 xqm->qm_usr_dqhtable = NULL;
209 xqm->qm_grp_dqhtable = NULL;
210 xqm->qm_dqhashmask = 0;
211 xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist));
213 mutex_destroy(&qcheck_lock);
219 * Called at mount time to let XQM know that another file system is
220 * starting quotas. This isn't crucial information as the individual mount
221 * structures are pretty independent, but it helps the XQM keep a
222 * global view of what's going on.
226 xfs_qm_hold_quotafs_ref(
227 struct xfs_mount *mp)
230 * Need to lock the xfs_Gqm structure for things like this. For example,
231 * the structure could disappear between the entry to this routine and
232 * a HOLD operation if not locked.
234 mutex_lock(&xfs_Gqm_lock);
237 xfs_Gqm = xfs_Gqm_init();
243 * We can keep a list of all filesystems with quotas mounted for
244 * debugging and statistical purposes, but ...
245 * Just take a reference and get out.
248 mutex_unlock(&xfs_Gqm_lock);
255 * Release the reference that a filesystem took at mount time,
256 * so that we know when we need to destroy the entire quota manager.
260 xfs_qm_rele_quotafs_ref(
261 struct xfs_mount *mp)
263 xfs_dquot_t *dqp, *nextdqp;
266 ASSERT(xfs_Gqm->qm_nrefs > 0);
269 * Go thru the freelist and destroy all inactive dquots.
271 xfs_qm_freelist_lock(xfs_Gqm);
273 for (dqp = xfs_Gqm->qm_dqfreelist.qh_next;
274 dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) {
276 nextdqp = dqp->dq_flnext;
277 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
278 ASSERT(dqp->q_mount == NULL);
279 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
280 ASSERT(dqp->HL_PREVP == NULL);
281 ASSERT(list_empty(&dqp->q_mplist));
282 XQM_FREELIST_REMOVE(dqp);
284 xfs_qm_dqdestroy(dqp);
290 xfs_qm_freelist_unlock(xfs_Gqm);
293 * Destroy the entire XQM. If somebody mounts with quotaon, this'll
296 mutex_lock(&xfs_Gqm_lock);
297 if (--xfs_Gqm->qm_nrefs == 0) {
298 xfs_qm_destroy(xfs_Gqm);
301 mutex_unlock(&xfs_Gqm_lock);
305 * Just destroy the quotainfo structure.
309 struct xfs_mount *mp)
311 if (mp->m_quotainfo) {
312 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_UMOUNTING);
313 xfs_qm_destroy_quotainfo(mp);
319 * This is called from xfs_mountfs to start quotas and initialize all
320 * necessary data structures like quotainfo. This is also responsible for
321 * running a quotacheck as necessary. We are guaranteed that the superblock
322 * is consistently read in at this point.
324 * If we fail here, the mount will continue with quota turned off. We don't
325 * need to inidicate success or failure at all.
335 * If quotas on realtime volumes is not supported, we disable
336 * quotas immediately.
338 if (mp->m_sb.sb_rextents) {
340 "Cannot turn on quotas for realtime filesystem %s",
346 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
349 * Allocate the quotainfo structure inside the mount struct, and
350 * create quotainode(s), and change/rev superblock if necessary.
352 error = xfs_qm_init_quotainfo(mp);
355 * We must turn off quotas.
357 ASSERT(mp->m_quotainfo == NULL);
362 * If any of the quotas are not consistent, do a quotacheck.
364 if (XFS_QM_NEED_QUOTACHECK(mp)) {
365 error = xfs_qm_quotacheck(mp);
367 /* Quotacheck failed and disabled quotas. */
372 * If one type of quotas is off, then it will lose its
373 * quotachecked status, since we won't be doing accounting for
376 if (!XFS_IS_UQUOTA_ON(mp))
377 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
378 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
379 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
383 * We actually don't have to acquire the m_sb_lock at all.
384 * This can only be called from mount, and that's single threaded. XXX
386 spin_lock(&mp->m_sb_lock);
387 sbf = mp->m_sb.sb_qflags;
388 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
389 spin_unlock(&mp->m_sb_lock);
391 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
392 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
394 * We could only have been turning quotas off.
395 * We aren't in very good shape actually because
396 * the incore structures are convinced that quotas are
397 * off, but the on disk superblock doesn't know that !
399 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
400 xfs_fs_cmn_err(CE_ALERT, mp,
401 "XFS mount_quotas: Superblock update failed!");
406 xfs_fs_cmn_err(CE_WARN, mp,
407 "Failed to initialize disk quotas.");
412 if (XFS_IS_QUOTA_ON(mp))
413 xfs_qm_internalqcheck(mp);
418 * Called from the vfsops layer.
421 xfs_qm_unmount_quotas(
425 * Release the dquots that root inode, et al might be holding,
426 * before we flush quotas and blow away the quotainfo structure.
428 ASSERT(mp->m_rootip);
429 xfs_qm_dqdetach(mp->m_rootip);
431 xfs_qm_dqdetach(mp->m_rbmip);
433 xfs_qm_dqdetach(mp->m_rsumip);
436 * Release the quota inodes.
438 if (mp->m_quotainfo) {
439 if (mp->m_quotainfo->qi_uquotaip) {
440 IRELE(mp->m_quotainfo->qi_uquotaip);
441 mp->m_quotainfo->qi_uquotaip = NULL;
443 if (mp->m_quotainfo->qi_gquotaip) {
444 IRELE(mp->m_quotainfo->qi_gquotaip);
445 mp->m_quotainfo->qi_gquotaip = NULL;
451 * Flush all dquots of the given file system to disk. The dquots are
452 * _not_ purged from memory here, just their data written to disk.
464 if (mp->m_quotainfo == NULL)
468 mutex_lock(&mp->m_quotainfo->qi_dqlist_lock);
469 list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist, q_mplist) {
471 if (! XFS_DQ_IS_DIRTY(dqp)) {
476 /* XXX a sentinel would be better */
477 recl = mp->m_quotainfo->qi_dqreclaims;
478 if (!xfs_dqflock_nowait(dqp)) {
480 * If we can't grab the flush lock then check
481 * to see if the dquot has been flushed delayed
482 * write. If so, grab its buffer and send it
483 * out immediately. We'll be able to acquire
484 * the flush lock when the I/O completes.
486 xfs_qm_dqflock_pushbuf_wait(dqp);
489 * Let go of the mplist lock. We don't want to hold it
490 * across a disk write.
492 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
493 error = xfs_qm_dqflush(dqp, sync_mode);
498 mutex_lock(&mp->m_quotainfo->qi_dqlist_lock);
499 if (recl != mp->m_quotainfo->qi_dqreclaims) {
500 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
501 /* XXX restart limit */
506 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
511 * Release the group dquot pointers the user dquots may be
512 * carrying around as a hint. mplist is locked on entry and exit.
515 xfs_qm_detach_gdquots(
518 xfs_dquot_t *dqp, *gdqp;
522 ASSERT(mutex_is_locked(&mp->m_quotainfo->qi_dqlist_lock));
523 list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist, q_mplist) {
525 if ((gdqp = dqp->q_gdquot)) {
527 dqp->q_gdquot = NULL;
533 * Can't hold the mplist lock across a dqput.
534 * XXXmust convert to marker based iterations here.
536 nrecl = mp->m_quotainfo->qi_dqreclaims;
537 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
540 mutex_lock(&mp->m_quotainfo->qi_dqlist_lock);
541 if (nrecl != mp->m_quotainfo->qi_dqreclaims)
548 * Go through all the incore dquots of this file system and take them
549 * off the mplist and hashlist, if the dquot type matches the dqtype
550 * parameter. This is used when turning off quota accounting for
551 * users and/or groups, as well as when the filesystem is unmounting.
556 uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/PQUOTA/GQUOTA */
558 xfs_dquot_t *dqp, *n;
563 if (mp->m_quotainfo == NULL)
566 dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
567 dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0;
568 dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
570 mutex_lock(&mp->m_quotainfo->qi_dqlist_lock);
573 * In the first pass through all incore dquots of this filesystem,
574 * we release the group dquot pointers the user dquots may be
575 * carrying around as a hint. We need to do this irrespective of
576 * what's being turned off.
578 xfs_qm_detach_gdquots(mp);
582 ASSERT(mutex_is_locked(&mp->m_quotainfo->qi_dqlist_lock));
584 * Try to get rid of all of the unwanted dquots. The idea is to
585 * get them off mplist and hashlist, but leave them on freelist.
587 list_for_each_entry_safe(dqp, n, &mp->m_quotainfo->qi_dqlist, q_mplist) {
589 * It's OK to look at the type without taking dqlock here.
590 * We're holding the mplist lock here, and that's needed for
593 if ((dqp->dq_flags & dqtype) == 0)
596 if (!mutex_trylock(&dqp->q_hash->qh_lock)) {
597 nrecl = mp->m_quotainfo->qi_dqreclaims;
598 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
599 mutex_lock(&dqp->q_hash->qh_lock);
600 mutex_lock(&mp->m_quotainfo->qi_dqlist_lock);
603 * XXXTheoretically, we can get into a very long
604 * ping pong game here.
605 * No one can be adding dquots to the mplist at
606 * this point, but somebody might be taking things off.
608 if (nrecl != mp->m_quotainfo->qi_dqreclaims) {
609 mutex_unlock(&dqp->q_hash->qh_lock);
615 * Take the dquot off the mplist and hashlist. It may remain on
616 * freelist in INACTIVE state.
618 nmisses += xfs_qm_dqpurge(dqp);
620 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
632 * Purge the dquot cache.
633 * None of the dquots should really be busy at this point.
635 if (mp->m_quotainfo) {
636 while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
649 xfs_dquot_t *udqhint, /* hint */
650 xfs_dquot_t **IO_idqpp)
655 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
659 * See if we already have it in the inode itself. IO_idqpp is
660 * &i_udquot or &i_gdquot. This made the code look weird, but
661 * made the logic a lot simpler.
665 trace_xfs_dqattach_found(dqp);
670 * udqhint is the i_udquot field in inode, and is non-NULL only
671 * when the type arg is group/project. Its purpose is to save a
672 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
676 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
680 * No need to take dqlock to look at the id.
682 * The ID can't change until it gets reclaimed, and it won't
683 * be reclaimed as long as we have a ref from inode and we
686 dqp = udqhint->q_gdquot;
687 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
690 ASSERT(*IO_idqpp == NULL);
694 xfs_dqunlock(udqhint);
699 * We can't hold a dquot lock when we call the dqget code.
700 * We'll deadlock in no time, because of (not conforming to)
701 * lock ordering - the inodelock comes before any dquot lock,
702 * and we may drop and reacquire the ilock in xfs_qm_dqget().
704 xfs_dqunlock(udqhint);
708 * Find the dquot from somewhere. This bumps the
709 * reference count of dquot and returns it locked.
710 * This can return ENOENT if dquot didn't exist on
711 * disk and we didn't ask it to allocate;
712 * ESRCH if quotas got turned off suddenly.
714 error = xfs_qm_dqget(ip->i_mount, ip, id, type, XFS_QMOPT_DOWARN, &dqp);
718 trace_xfs_dqattach_get(dqp);
721 * dqget may have dropped and re-acquired the ilock, but it guarantees
722 * that the dquot returned is the one that should go in the inode.
731 * Given a udquot and gdquot, attach a ptr to the group dquot in the
732 * udquot as a hint for future lookups. The idea sounds simple, but the
733 * execution isn't, because the udquot might have a group dquot attached
734 * already and getting rid of that gets us into lock ordering constraints.
735 * The process is complicated more by the fact that the dquots may or may not
736 * be locked on entry.
739 xfs_qm_dqattach_grouphint(
747 if ((tmp = udq->q_gdquot)) {
753 udq->q_gdquot = NULL;
755 * We can't keep any dqlocks when calling dqrele,
756 * because the freelist lock comes before dqlocks.
760 * we took a hard reference once upon a time in dqget,
761 * so give it back when the udquot no longer points at it
762 * dqput() does the unlocking of the dquot.
770 ASSERT(XFS_DQ_IS_LOCKED(udq));
774 ASSERT(XFS_DQ_IS_LOCKED(udq));
775 ASSERT(XFS_DQ_IS_LOCKED(gdq));
777 * Somebody could have attached a gdquot here,
778 * when we dropped the uqlock. If so, just do nothing.
780 if (udq->q_gdquot == NULL) {
791 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
793 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
794 * Inode may get unlocked and relocked in here, and the caller must deal with
798 xfs_qm_dqattach_locked(
802 xfs_mount_t *mp = ip->i_mount;
806 if (!XFS_IS_QUOTA_RUNNING(mp) ||
807 !XFS_IS_QUOTA_ON(mp) ||
808 !XFS_NOT_DQATTACHED(mp, ip) ||
809 ip->i_ino == mp->m_sb.sb_uquotino ||
810 ip->i_ino == mp->m_sb.sb_gquotino)
813 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
815 if (XFS_IS_UQUOTA_ON(mp)) {
816 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
817 flags & XFS_QMOPT_DQALLOC,
818 NULL, &ip->i_udquot);
824 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
825 if (XFS_IS_OQUOTA_ON(mp)) {
826 error = XFS_IS_GQUOTA_ON(mp) ?
827 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
828 flags & XFS_QMOPT_DQALLOC,
829 ip->i_udquot, &ip->i_gdquot) :
830 xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ,
831 flags & XFS_QMOPT_DQALLOC,
832 ip->i_udquot, &ip->i_gdquot);
834 * Don't worry about the udquot that we may have
835 * attached above. It'll get detached, if not already.
843 * Attach this group quota to the user quota as a hint.
844 * This WON'T, in general, result in a thrash.
847 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
848 ASSERT(ip->i_udquot);
849 ASSERT(ip->i_gdquot);
852 * We may or may not have the i_udquot locked at this point,
853 * but this check is OK since we don't depend on the i_gdquot to
854 * be accurate 100% all the time. It is just a hint, and this
855 * will succeed in general.
857 if (ip->i_udquot->q_gdquot == ip->i_gdquot)
860 * Attach i_gdquot to the gdquot hint inside the i_udquot.
862 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
868 if (XFS_IS_UQUOTA_ON(mp))
869 ASSERT(ip->i_udquot);
870 if (XFS_IS_OQUOTA_ON(mp))
871 ASSERT(ip->i_gdquot);
873 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
880 struct xfs_inode *ip,
885 xfs_ilock(ip, XFS_ILOCK_EXCL);
886 error = xfs_qm_dqattach_locked(ip, flags);
887 xfs_iunlock(ip, XFS_ILOCK_EXCL);
893 * Release dquots (and their references) if any.
894 * The inode should be locked EXCL except when this's called by
901 if (!(ip->i_udquot || ip->i_gdquot))
904 trace_xfs_dquot_dqdetach(ip);
906 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
907 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
909 xfs_qm_dqrele(ip->i_udquot);
913 xfs_qm_dqrele(ip->i_gdquot);
927 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
933 mutex_lock(&mp->m_quotainfo->qi_dqlist_lock);
935 * dqpurge_all() also takes the mplist lock and iterate thru all dquots
936 * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared
937 * when we have the mplist lock, we know that dquots will be consistent
938 * as long as we have it locked.
940 if (!XFS_IS_QUOTA_ON(mp)) {
941 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
944 ASSERT(mutex_is_locked(&mp->m_quotainfo->qi_dqlist_lock));
945 list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist, q_mplist) {
947 * If this is vfs_sync calling, then skip the dquots that
948 * don't 'seem' to be dirty. ie. don't acquire dqlock.
949 * This is very similar to what xfs_sync does with inodes.
951 if (flags & SYNC_TRYLOCK) {
952 if (!XFS_DQ_IS_DIRTY(dqp))
954 if (!xfs_qm_dqlock_nowait(dqp))
961 * Now, find out for sure if this dquot is dirty or not.
963 if (! XFS_DQ_IS_DIRTY(dqp)) {
968 /* XXX a sentinel would be better */
969 recl = mp->m_quotainfo->qi_dqreclaims;
970 if (!xfs_dqflock_nowait(dqp)) {
971 if (flags & SYNC_TRYLOCK) {
976 * If we can't grab the flush lock then if the caller
977 * really wanted us to give this our best shot, so
978 * see if we can give a push to the buffer before we wait
979 * on the flush lock. At this point, we know that
980 * even though the dquot is being flushed,
981 * it has (new) dirty data.
983 xfs_qm_dqflock_pushbuf_wait(dqp);
986 * Let go of the mplist lock. We don't want to hold it
987 * across a disk write
989 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
990 error = xfs_qm_dqflush(dqp, flags);
992 if (error && XFS_FORCED_SHUTDOWN(mp))
993 return 0; /* Need to prevent umount failure */
997 mutex_lock(&mp->m_quotainfo->qi_dqlist_lock);
998 if (recl != mp->m_quotainfo->qi_dqreclaims) {
999 if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS)
1002 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
1007 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
1012 * The hash chains and the mplist use the same xfs_dqhash structure as
1013 * their list head, but we can take the mplist qh_lock and one of the
1014 * hash qh_locks at the same time without any problem as they aren't
1017 static struct lock_class_key xfs_quota_mplist_class;
1020 * This initializes all the quota information that's kept in the
1024 xfs_qm_init_quotainfo(
1027 xfs_quotainfo_t *qinf;
1031 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1034 * Tell XQM that we exist as soon as possible.
1036 if ((error = xfs_qm_hold_quotafs_ref(mp))) {
1040 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
1043 * See if quotainodes are setup, and if not, allocate them,
1044 * and change the superblock accordingly.
1046 if ((error = xfs_qm_init_quotainos(mp))) {
1048 mp->m_quotainfo = NULL;
1052 INIT_LIST_HEAD(&qinf->qi_dqlist);
1053 mutex_init(&qinf->qi_dqlist_lock);
1054 lockdep_set_class(&qinf->qi_dqlist_lock, &xfs_quota_mplist_class);
1056 qinf->qi_dqreclaims = 0;
1058 /* mutex used to serialize quotaoffs */
1059 mutex_init(&qinf->qi_quotaofflock);
1061 /* Precalc some constants */
1062 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1063 ASSERT(qinf->qi_dqchunklen);
1064 qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
1065 do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
1067 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
1070 * We try to get the limits from the superuser's limits fields.
1071 * This is quite hacky, but it is standard quota practice.
1072 * We look at the USR dquot with id == 0 first, but if user quotas
1073 * are not enabled we goto the GRP dquot with id == 0.
1074 * We don't really care to keep separate default limits for user
1075 * and group quotas, at least not at this point.
1077 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0,
1078 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
1079 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
1081 XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN,
1084 xfs_disk_dquot_t *ddqp = &dqp->q_core;
1087 * The warnings and timers set the grace period given to
1088 * a user or group before he or she can not perform any
1089 * more writing. If it is zero, a default is used.
1091 qinf->qi_btimelimit = ddqp->d_btimer ?
1092 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
1093 qinf->qi_itimelimit = ddqp->d_itimer ?
1094 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
1095 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
1096 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
1097 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
1098 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
1099 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
1100 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
1101 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
1102 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
1103 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
1104 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
1105 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
1106 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
1107 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
1108 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
1111 * We sent the XFS_QMOPT_DQSUSER flag to dqget because
1112 * we don't want this dquot cached. We haven't done a
1113 * quotacheck yet, and quotacheck doesn't like incore dquots.
1115 xfs_qm_dqdestroy(dqp);
1117 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
1118 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
1119 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
1120 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
1121 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
1122 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
1130 * Gets called when unmounting a filesystem or when all quotas get
1132 * This purges the quota inodes, destroys locks and frees itself.
1135 xfs_qm_destroy_quotainfo(
1138 xfs_quotainfo_t *qi;
1140 qi = mp->m_quotainfo;
1142 ASSERT(xfs_Gqm != NULL);
1145 * Release the reference that XQM kept, so that we know
1146 * when the XQM structure should be freed. We cannot assume
1147 * that xfs_Gqm is non-null after this point.
1149 xfs_qm_rele_quotafs_ref(mp);
1151 ASSERT(list_empty(&qi->qi_dqlist));
1152 mutex_destroy(&qi->qi_dqlist_lock);
1154 if (qi->qi_uquotaip) {
1155 IRELE(qi->qi_uquotaip);
1156 qi->qi_uquotaip = NULL; /* paranoia */
1158 if (qi->qi_gquotaip) {
1159 IRELE(qi->qi_gquotaip);
1160 qi->qi_gquotaip = NULL;
1162 mutex_destroy(&qi->qi_quotaofflock);
1164 mp->m_quotainfo = NULL;
1169 /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
1178 mutex_init(&list->qh_lock);
1179 list->qh_next = NULL;
1180 list->qh_version = 0;
1181 list->qh_nelems = 0;
1185 xfs_qm_list_destroy(
1188 mutex_destroy(&(list->qh_lock));
1193 * Stripped down version of dqattach. This doesn't attach, or even look at the
1194 * dquots attached to the inode. The rationale is that there won't be any
1195 * attached at the time this is called from quotacheck.
1198 xfs_qm_dqget_noattach(
1200 xfs_dquot_t **O_udqpp,
1201 xfs_dquot_t **O_gdqpp)
1205 xfs_dquot_t *udqp, *gdqp;
1207 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1212 if (XFS_IS_UQUOTA_ON(mp)) {
1213 ASSERT(ip->i_udquot == NULL);
1215 * We want the dquot allocated if it doesn't exist.
1217 if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER,
1218 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN,
1221 * Shouldn't be able to turn off quotas here.
1223 ASSERT(error != ESRCH);
1224 ASSERT(error != ENOENT);
1230 if (XFS_IS_OQUOTA_ON(mp)) {
1231 ASSERT(ip->i_gdquot == NULL);
1234 error = XFS_IS_GQUOTA_ON(mp) ?
1235 xfs_qm_dqget(mp, ip,
1236 ip->i_d.di_gid, XFS_DQ_GROUP,
1237 XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN,
1239 xfs_qm_dqget(mp, ip,
1240 ip->i_d.di_projid, XFS_DQ_PROJ,
1241 XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN,
1245 xfs_qm_dqrele(udqp);
1246 ASSERT(error != ESRCH);
1247 ASSERT(error != ENOENT);
1252 /* Reacquire the locks in the right order */
1254 if (! xfs_qm_dqlock_nowait(udqp)) {
1266 if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp));
1267 if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp));
1273 * Create an inode and return with a reference already taken, but unlocked
1274 * This is how we create quota inodes
1287 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
1288 if ((error = xfs_trans_reserve(tp,
1289 XFS_QM_QINOCREATE_SPACE_RES(mp),
1290 XFS_CREATE_LOG_RES(mp), 0,
1291 XFS_TRANS_PERM_LOG_RES,
1292 XFS_CREATE_LOG_COUNT))) {
1293 xfs_trans_cancel(tp, 0);
1297 if ((error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0,
1298 &xfs_zerocr, 0, 1, ip, &committed))) {
1299 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
1305 * Keep an extra reference to this quota inode. This inode is
1306 * locked exclusively and joined to the transaction already.
1308 ASSERT(xfs_isilocked(*ip, XFS_ILOCK_EXCL));
1312 * Make the changes in the superblock, and log those too.
1313 * sbfields arg may contain fields other than *QUOTINO;
1314 * VERSIONNUM for example.
1316 spin_lock(&mp->m_sb_lock);
1317 if (flags & XFS_QMOPT_SBVERSION) {
1318 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
1319 unsigned oldv = mp->m_sb.sb_versionnum;
1321 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
1322 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1323 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
1324 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1325 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
1327 xfs_sb_version_addquota(&mp->m_sb);
1328 mp->m_sb.sb_uquotino = NULLFSINO;
1329 mp->m_sb.sb_gquotino = NULLFSINO;
1331 /* qflags will get updated _after_ quotacheck */
1332 mp->m_sb.sb_qflags = 0;
1333 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
1335 "Old superblock version %x, converting to %x.",
1336 oldv, mp->m_sb.sb_versionnum);
1339 if (flags & XFS_QMOPT_UQUOTA)
1340 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1342 mp->m_sb.sb_gquotino = (*ip)->i_ino;
1343 spin_unlock(&mp->m_sb_lock);
1344 xfs_mod_sb(tp, sbfields);
1346 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
1347 xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!");
1355 xfs_qm_reset_dqcounts(
1361 xfs_disk_dquot_t *ddq;
1364 trace_xfs_reset_dqcounts(bp, _RET_IP_);
1367 * Reset all counters and timers. They'll be
1368 * started afresh by xfs_qm_quotacheck.
1371 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1372 do_div(j, sizeof(xfs_dqblk_t));
1373 ASSERT(XFS_QM_DQPERBLK(mp) == j);
1375 ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp);
1376 for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) {
1378 * Do a sanity check, and if needed, repair the dqblk. Don't
1379 * output any warnings because it's perfectly possible to
1380 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
1382 (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1386 ddq->d_rtbcount = 0;
1389 ddq->d_rtbtimer = 0;
1392 ddq->d_rtbwarns = 0;
1393 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
1402 xfs_filblks_t blkcnt,
1413 incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ?
1414 XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt;
1415 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1416 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
1420 * Blkcnt arg can be a very big number, and might even be
1421 * larger than the log itself. So, we have to break it up into
1422 * manageable-sized transactions.
1423 * Note that we don't start a permanent transaction here; we might
1424 * not be able to get a log reservation for the whole thing up front,
1425 * and we don't really care to either, because we just discard
1426 * everything if we were to crash in the middle of this loop.
1429 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1430 XFS_FSB_TO_DADDR(mp, bno),
1431 (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp);
1435 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1436 xfs_bdwrite(mp, bp);
1438 * goto the next block.
1441 firstid += XFS_QM_DQPERBLK(mp);
1447 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1448 * caller supplied function for every chunk of dquots that we find.
1456 xfs_bmbt_irec_t *map;
1457 int i, nmaps; /* number of map entries */
1458 int error; /* return value */
1459 xfs_fileoff_t lblkno;
1460 xfs_filblks_t maxlblkcnt;
1462 xfs_fsblock_t rablkno;
1463 xfs_filblks_t rablkcnt;
1467 * This looks racy, but we can't keep an inode lock across a
1468 * trans_reserve. But, this gets called during quotacheck, and that
1469 * happens only at mount time which is single threaded.
1471 if (qip->i_d.di_nblocks == 0)
1474 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1477 maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1479 nmaps = XFS_DQITER_MAP_SIZE;
1481 * We aren't changing the inode itself. Just changing
1482 * some of its data. No new blocks are added here, and
1483 * the inode is never added to the transaction.
1485 xfs_ilock(qip, XFS_ILOCK_SHARED);
1486 error = xfs_bmapi(NULL, qip, lblkno,
1487 maxlblkcnt - lblkno,
1490 0, map, &nmaps, NULL, NULL);
1491 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1495 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1496 for (i = 0; i < nmaps; i++) {
1497 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1498 ASSERT(map[i].br_blockcount);
1501 lblkno += map[i].br_blockcount;
1503 if (map[i].br_startblock == HOLESTARTBLOCK)
1506 firstid = (xfs_dqid_t) map[i].br_startoff *
1507 XFS_QM_DQPERBLK(mp);
1509 * Do a read-ahead on the next extent.
1511 if ((i+1 < nmaps) &&
1512 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1513 rablkcnt = map[i+1].br_blockcount;
1514 rablkno = map[i+1].br_startblock;
1515 while (rablkcnt--) {
1516 xfs_baread(mp->m_ddev_targp,
1517 XFS_FSB_TO_DADDR(mp, rablkno),
1518 (int)XFS_QI_DQCHUNKLEN(mp));
1523 * Iterate thru all the blks in the extent and
1524 * reset the counters of all the dquots inside them.
1526 if ((error = xfs_qm_dqiter_bufs(mp,
1528 map[i].br_startblock,
1529 map[i].br_blockcount,
1537 } while (nmaps > 0);
1545 * Called by dqusage_adjust in doing a quotacheck.
1546 * Given the inode, and a dquot (either USR or GRP, doesn't matter),
1547 * this updates its incore copy as well as the buffer copy. This is
1548 * so that once the quotacheck is done, we can just log all the buffers,
1549 * as opposed to logging numerous updates to individual dquots.
1552 xfs_qm_quotacheck_dqadjust(
1557 ASSERT(XFS_DQ_IS_LOCKED(dqp));
1559 trace_xfs_dqadjust(dqp);
1562 * Adjust the inode count and the block count to reflect this inode's
1565 be64_add_cpu(&dqp->q_core.d_icount, 1);
1566 dqp->q_res_icount++;
1568 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1569 dqp->q_res_bcount += nblks;
1572 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1573 dqp->q_res_rtbcount += rtblks;
1577 * Set default limits, adjust timers (since we changed usages)
1579 if (! XFS_IS_SUSER_DQUOT(dqp)) {
1580 xfs_qm_adjust_dqlimits(dqp->q_mount, &dqp->q_core);
1581 xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core);
1584 dqp->dq_flags |= XFS_DQ_DIRTY;
1590 xfs_qcnt_t *O_rtblks)
1592 xfs_filblks_t rtblks; /* total rt blks */
1593 xfs_extnum_t idx; /* extent record index */
1594 xfs_ifork_t *ifp; /* inode fork pointer */
1595 xfs_extnum_t nextents; /* number of extent entries */
1598 ASSERT(XFS_IS_REALTIME_INODE(ip));
1599 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1600 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1601 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1605 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1606 for (idx = 0; idx < nextents; idx++)
1607 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1608 *O_rtblks = (xfs_qcnt_t)rtblks;
1613 * callback routine supplied to bulkstat(). Given an inumber, find its
1614 * dquots and update them to account for resources taken by that inode.
1618 xfs_qm_dqusage_adjust(
1619 xfs_mount_t *mp, /* mount point for filesystem */
1620 xfs_ino_t ino, /* inode number to get data for */
1621 void __user *buffer, /* not used */
1622 int ubsize, /* not used */
1623 void *private_data, /* not used */
1624 xfs_daddr_t bno, /* starting block of inode cluster */
1625 int *ubused, /* not used */
1626 void *dip, /* on-disk inode pointer (not used) */
1627 int *res) /* result code value */
1630 xfs_dquot_t *udqp, *gdqp;
1631 xfs_qcnt_t nblks, rtblks;
1634 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1637 * rootino must have its resources accounted for, not so with the quota
1640 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1641 *res = BULKSTAT_RV_NOTHING;
1642 return XFS_ERROR(EINVAL);
1646 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1647 * interface expects the inode to be exclusively locked because that's
1648 * the case in all other instances. It's OK that we do this because
1649 * quotacheck is done only at mount time.
1651 if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) {
1652 *res = BULKSTAT_RV_NOTHING;
1657 * Obtain the locked dquots. In case of an error (eg. allocation
1658 * fails for ENOSPC), we return the negative of the error number
1659 * to bulkstat, so that it can get propagated to quotacheck() and
1660 * making us disable quotas for the file system.
1662 if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) {
1663 xfs_iput(ip, XFS_ILOCK_EXCL);
1664 *res = BULKSTAT_RV_GIVEUP;
1669 if (! XFS_IS_REALTIME_INODE(ip)) {
1670 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks;
1673 * Walk thru the extent list and count the realtime blocks.
1675 if ((error = xfs_qm_get_rtblks(ip, &rtblks))) {
1676 xfs_iput(ip, XFS_ILOCK_EXCL);
1681 *res = BULKSTAT_RV_GIVEUP;
1684 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1686 ASSERT(ip->i_delayed_blks == 0);
1689 * We can't release the inode while holding its dquot locks.
1690 * The inode can go into inactive and might try to acquire the dquotlocks.
1691 * So, just unlock here and do a vn_rele at the end.
1693 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1696 * Add the (disk blocks and inode) resources occupied by this
1697 * inode to its dquots. We do this adjustment in the incore dquot,
1698 * and also copy the changes to its buffer.
1699 * We don't care about putting these changes in a transaction
1700 * envelope because if we crash in the middle of a 'quotacheck'
1701 * we have to start from the beginning anyway.
1702 * Once we're done, we'll log all the dquot bufs.
1704 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1705 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1707 if (XFS_IS_UQUOTA_ON(mp)) {
1709 xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks);
1712 if (XFS_IS_OQUOTA_ON(mp)) {
1714 xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks);
1718 * Now release the inode. This will send it to 'inactive', and
1719 * possibly even free blocks.
1726 *res = BULKSTAT_RV_DIDONE;
1731 * Walk thru all the filesystem inodes and construct a consistent view
1732 * of the disk quota world. If the quotacheck fails, disable quotas.
1738 int done, count, error;
1741 xfs_inode_t *uip, *gip;
1749 ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp));
1750 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1753 * There should be no cached dquots. The (simplistic) quotacheck
1754 * algorithm doesn't like that.
1756 ASSERT(list_empty(&mp->m_quotainfo->qi_dqlist));
1758 cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname);
1761 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1762 * their counters to zero. We need a clean slate.
1763 * We don't log our changes till later.
1765 if ((uip = XFS_QI_UQIP(mp))) {
1766 if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA)))
1768 flags |= XFS_UQUOTA_CHKD;
1771 if ((gip = XFS_QI_GQIP(mp))) {
1772 if ((error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
1773 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA)))
1775 flags |= XFS_OQUOTA_CHKD;
1780 * Iterate thru all the inodes in the file system,
1781 * adjusting the corresponding dquot counters in core.
1783 if ((error = xfs_bulkstat(mp, &lastino, &count,
1784 xfs_qm_dqusage_adjust, NULL,
1785 structsz, NULL, BULKSTAT_FG_IGET, &done)))
1791 * We've made all the changes that we need to make incore.
1792 * Flush them down to disk buffers if everything was updated
1796 error = xfs_qm_dqflush_all(mp, 0);
1799 * We can get this error if we couldn't do a dquot allocation inside
1800 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1801 * dirty dquots that might be cached, we just want to get rid of them
1802 * and turn quotaoff. The dquots won't be attached to any of the inodes
1803 * at this point (because we intentionally didn't in dqget_noattach).
1806 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_QUOTAOFF);
1811 * We didn't log anything, because if we crashed, we'll have to
1812 * start the quotacheck from scratch anyway. However, we must make
1813 * sure that our dquot changes are secure before we put the
1814 * quotacheck'd stamp on the superblock. So, here we do a synchronous
1817 XFS_bflush(mp->m_ddev_targp);
1820 * If one type of quotas is off, then it will lose its
1821 * quotachecked status, since we won't be doing accounting for
1822 * that type anymore.
1824 mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
1825 mp->m_qflags |= flags;
1827 xfs_qm_dquot_list_print(mp);
1831 cmn_err(CE_WARN, "XFS quotacheck %s: Unsuccessful (Error %d): "
1832 "Disabling quotas.",
1833 mp->m_fsname, error);
1835 * We must turn off quotas.
1837 ASSERT(mp->m_quotainfo != NULL);
1838 ASSERT(xfs_Gqm != NULL);
1839 xfs_qm_destroy_quotainfo(mp);
1840 if (xfs_mount_reset_sbqflags(mp)) {
1841 cmn_err(CE_WARN, "XFS quotacheck %s: "
1842 "Failed to reset quota flags.", mp->m_fsname);
1845 cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname);
1851 * This is called after the superblock has been read in and we're ready to
1852 * iget the quota inodes.
1855 xfs_qm_init_quotainos(
1858 xfs_inode_t *uip, *gip;
1863 ASSERT(mp->m_quotainfo);
1869 * Get the uquota and gquota inodes
1871 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1872 if (XFS_IS_UQUOTA_ON(mp) &&
1873 mp->m_sb.sb_uquotino != NULLFSINO) {
1874 ASSERT(mp->m_sb.sb_uquotino > 0);
1875 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1877 return XFS_ERROR(error);
1879 if (XFS_IS_OQUOTA_ON(mp) &&
1880 mp->m_sb.sb_gquotino != NULLFSINO) {
1881 ASSERT(mp->m_sb.sb_gquotino > 0);
1882 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1886 return XFS_ERROR(error);
1890 flags |= XFS_QMOPT_SBVERSION;
1891 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1892 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
1896 * Create the two inodes, if they don't exist already. The changes
1897 * made above will get added to a transaction and logged in one of
1898 * the qino_alloc calls below. If the device is readonly,
1899 * temporarily switch to read-write to do this.
1901 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1902 if ((error = xfs_qm_qino_alloc(mp, &uip,
1903 sbflags | XFS_SB_UQUOTINO,
1904 flags | XFS_QMOPT_UQUOTA)))
1905 return XFS_ERROR(error);
1907 flags &= ~XFS_QMOPT_SBVERSION;
1909 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
1910 flags |= (XFS_IS_GQUOTA_ON(mp) ?
1911 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1912 error = xfs_qm_qino_alloc(mp, &gip,
1913 sbflags | XFS_SB_GQUOTINO, flags);
1918 return XFS_ERROR(error);
1922 XFS_QI_UQIP(mp) = uip;
1923 XFS_QI_GQIP(mp) = gip;
1930 * Traverse the freelist of dquots and attempt to reclaim a maximum of
1931 * 'howmany' dquots. This operation races with dqlookup(), and attempts to
1932 * favor the lookup function ...
1933 * XXXsup merge this with qm_reclaim_one().
1936 xfs_qm_shake_freelist(
1941 xfs_dquot_t *dqp, *nextdqp;
1953 cmn_err(CE_DEBUG, "Shake free 0x%x", howmany);
1955 /* lock order is : hashchainlock, freelistlock, mplistlock */
1957 xfs_qm_freelist_lock(xfs_Gqm);
1959 for (dqp = xfs_Gqm->qm_dqfreelist.qh_next;
1960 ((dqp != (xfs_dquot_t *) &xfs_Gqm->qm_dqfreelist) &&
1961 nreclaimed < howmany); ) {
1962 struct xfs_mount *mp = dqp->q_mount;
1966 * We are racing with dqlookup here. Naturally we don't
1967 * want to reclaim a dquot that lookup wants.
1969 if (dqp->dq_flags & XFS_DQ_WANT) {
1971 xfs_qm_freelist_unlock(xfs_Gqm);
1972 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
1974 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
1979 * If the dquot is inactive, we are assured that it is
1980 * not on the mplist or the hashlist, and that makes our
1983 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
1985 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
1986 ASSERT(dqp->HL_PREVP == NULL);
1987 ASSERT(list_empty(&dqp->q_mplist));
1988 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
1989 nextdqp = dqp->dq_flnext;
1993 ASSERT(!list_empty(&dqp->q_mplist));
1995 * Try to grab the flush lock. If this dquot is in the process of
1996 * getting flushed to disk, we don't want to reclaim it.
1998 if (!xfs_dqflock_nowait(dqp)) {
2000 dqp = dqp->dq_flnext;
2005 * We have the flush lock so we know that this is not in the
2006 * process of being flushed. So, if this is dirty, flush it
2007 * DELWRI so that we don't get a freelist infested with
2010 if (XFS_DQ_IS_DIRTY(dqp)) {
2013 trace_xfs_dqshake_dirty(dqp);
2016 * We flush it delayed write, so don't bother
2017 * releasing the mplock.
2019 error = xfs_qm_dqflush(dqp, 0);
2021 xfs_fs_cmn_err(CE_WARN, mp,
2022 "xfs_qm_dqflush_all: dquot %p flush failed", dqp);
2024 xfs_dqunlock(dqp); /* dqflush unlocks dqflock */
2025 dqp = dqp->dq_flnext;
2029 * We're trying to get the hashlock out of order. This races
2030 * with dqlookup; so, we giveup and goto the next dquot if
2031 * we couldn't get the hashlock. This way, we won't starve
2032 * a dqlookup process that holds the hashlock that is
2033 * waiting for the freelist lock.
2035 if (!mutex_trylock(&dqp->q_hash->qh_lock)) {
2038 dqp = dqp->dq_flnext;
2042 * This races with dquot allocation code as well as dqflush_all
2043 * and reclaim code. So, if we failed to grab the mplist lock,
2044 * giveup everything and start over.
2048 if (!mutex_trylock(&mp->m_quotainfo->qi_dqlist_lock)) {
2049 /* XXX put a sentinel so that we can come back here */
2052 mutex_unlock(&hash->qh_lock);
2053 xfs_qm_freelist_unlock(xfs_Gqm);
2054 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2059 trace_xfs_dqshake_unlink(dqp);
2062 cmn_err(CE_DEBUG, "Shake 0x%p, ID 0x%x\n",
2063 dqp, be32_to_cpu(dqp->q_core.d_id));
2065 ASSERT(dqp->q_nrefs == 0);
2066 nextdqp = dqp->dq_flnext;
2067 XQM_HASHLIST_REMOVE(hash, dqp);
2068 list_del_init(&dqp->q_mplist);
2069 mp->m_quotainfo->qi_dquots--;
2070 mp->m_quotainfo->qi_dqreclaims++;
2072 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
2073 mutex_unlock(&hash->qh_lock);
2076 XQM_FREELIST_REMOVE(dqp);
2079 XQM_STATS_INC(xqmstats.xs_qm_dqshake_reclaims);
2080 xfs_qm_dqdestroy(dqp);
2083 xfs_qm_freelist_unlock(xfs_Gqm);
2089 * The kmem_shake interface is invoked when memory is running low.
2093 xfs_qm_shake(int nr_to_scan, gfp_t gfp_mask)
2095 int ndqused, nfree, n;
2097 if (!kmem_shake_allow(gfp_mask))
2102 nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */
2103 /* incore dquots in all f/s's */
2104 ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree;
2106 ASSERT(ndqused >= 0);
2108 if (nfree <= ndqused && nfree < ndquot)
2111 ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */
2112 n = nfree - ndqused - ndquot; /* # over target */
2114 return xfs_qm_shake_freelist(MAX(nfree, n));
2119 * Just pop the least recently used dquot off the freelist and
2120 * recycle it. The returned dquot is locked.
2122 STATIC xfs_dquot_t *
2123 xfs_qm_dqreclaim_one(void)
2125 xfs_dquot_t *dqpout;
2134 /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */
2136 xfs_qm_freelist_lock(xfs_Gqm);
2138 FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) {
2139 struct xfs_mount *mp = dqp->q_mount;
2143 * We are racing with dqlookup here. Naturally we don't
2144 * want to reclaim a dquot that lookup wants. We release the
2145 * freelist lock and start over, so that lookup will grab
2146 * both the dquot and the freelistlock.
2148 if (dqp->dq_flags & XFS_DQ_WANT) {
2149 ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE));
2151 trace_xfs_dqreclaim_want(dqp);
2154 xfs_qm_freelist_unlock(xfs_Gqm);
2155 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2157 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
2162 * If the dquot is inactive, we are assured that it is
2163 * not on the mplist or the hashlist, and that makes our
2166 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
2168 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
2169 ASSERT(dqp->HL_PREVP == NULL);
2170 ASSERT(list_empty(&dqp->q_mplist));
2171 XQM_FREELIST_REMOVE(dqp);
2174 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
2178 ASSERT(dqp->q_hash);
2179 ASSERT(!list_empty(&dqp->q_mplist));
2182 * Try to grab the flush lock. If this dquot is in the process of
2183 * getting flushed to disk, we don't want to reclaim it.
2185 if (!xfs_dqflock_nowait(dqp)) {
2191 * We have the flush lock so we know that this is not in the
2192 * process of being flushed. So, if this is dirty, flush it
2193 * DELWRI so that we don't get a freelist infested with
2196 if (XFS_DQ_IS_DIRTY(dqp)) {
2199 trace_xfs_dqreclaim_dirty(dqp);
2202 * We flush it delayed write, so don't bother
2203 * releasing the freelist lock.
2205 error = xfs_qm_dqflush(dqp, 0);
2207 xfs_fs_cmn_err(CE_WARN, mp,
2208 "xfs_qm_dqreclaim: dquot %p flush failed", dqp);
2210 xfs_dqunlock(dqp); /* dqflush unlocks dqflock */
2214 if (!mutex_trylock(&mp->m_quotainfo->qi_dqlist_lock)) {
2220 if (!mutex_trylock(&dqp->q_hash->qh_lock))
2223 trace_xfs_dqreclaim_unlink(dqp);
2225 ASSERT(dqp->q_nrefs == 0);
2226 list_del_init(&dqp->q_mplist);
2227 mp->m_quotainfo->qi_dquots--;
2228 mp->m_quotainfo->qi_dqreclaims++;
2229 XQM_HASHLIST_REMOVE(dqp->q_hash, dqp);
2230 XQM_FREELIST_REMOVE(dqp);
2232 mutex_unlock(&dqp->q_hash->qh_lock);
2234 mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
2241 xfs_qm_freelist_unlock(xfs_Gqm);
2246 /*------------------------------------------------------------------*/
2249 * Return a new incore dquot. Depending on the number of
2250 * dquots in the system, we either allocate a new one on the kernel heap,
2251 * or reclaim a free one.
2252 * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed
2253 * to reclaim an existing one from the freelist.
2256 xfs_qm_dqalloc_incore(
2257 xfs_dquot_t **O_dqpp)
2262 * Check against high water mark to see if we want to pop
2263 * a nincompoop dquot off the freelist.
2265 if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) {
2267 * Try to recycle a dquot from the freelist.
2269 if ((dqp = xfs_qm_dqreclaim_one())) {
2270 XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
2272 * Just zero the core here. The rest will get
2273 * reinitialized by caller. XXX we shouldn't even
2276 memset(&dqp->q_core, 0, sizeof(dqp->q_core));
2280 XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
2284 * Allocate a brand new dquot on the kernel heap and return it
2285 * to the caller to initialize.
2287 ASSERT(xfs_Gqm->qm_dqzone != NULL);
2288 *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP);
2289 atomic_inc(&xfs_Gqm->qm_totaldquots);
2296 * Start a transaction and write the incore superblock changes to
2297 * disk. flags parameter indicates which fields have changed.
2300 xfs_qm_write_sb_changes(
2308 cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname);
2310 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
2311 if ((error = xfs_trans_reserve(tp, 0,
2312 mp->m_sb.sb_sectsize + 128, 0,
2314 XFS_DEFAULT_LOG_COUNT))) {
2315 xfs_trans_cancel(tp, 0);
2319 xfs_mod_sb(tp, flags);
2320 error = xfs_trans_commit(tp, 0);
2326 /* --------------- utility functions for vnodeops ---------------- */
2330 * Given an inode, a uid and gid (from cred_t) make sure that we have
2331 * allocated relevant dquot(s) on disk, and that we won't exceed inode
2332 * quotas by creating this file.
2333 * This also attaches dquot(s) to the given inode after locking it,
2334 * and returns the dquots corresponding to the uid and/or gid.
2336 * in : inode (unlocked)
2337 * out : udquot, gdquot with references taken and unlocked
2341 struct xfs_inode *ip,
2346 struct xfs_dquot **O_udqpp,
2347 struct xfs_dquot **O_gdqpp)
2349 struct xfs_mount *mp = ip->i_mount;
2350 struct xfs_dquot *uq, *gq;
2354 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2357 lockflags = XFS_ILOCK_EXCL;
2358 xfs_ilock(ip, lockflags);
2360 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
2361 gid = ip->i_d.di_gid;
2364 * Attach the dquot(s) to this inode, doing a dquot allocation
2365 * if necessary. The dquot(s) will not be locked.
2367 if (XFS_NOT_DQATTACHED(mp, ip)) {
2368 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
2370 xfs_iunlock(ip, lockflags);
2376 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
2377 if (ip->i_d.di_uid != uid) {
2379 * What we need is the dquot that has this uid, and
2380 * if we send the inode to dqget, the uid of the inode
2381 * takes priority over what's sent in the uid argument.
2382 * We must unlock inode here before calling dqget if
2383 * we're not sending the inode, because otherwise
2384 * we'll deadlock by doing trans_reserve while
2387 xfs_iunlock(ip, lockflags);
2388 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
2393 ASSERT(error != ENOENT);
2397 * Get the ilock in the right order.
2400 lockflags = XFS_ILOCK_SHARED;
2401 xfs_ilock(ip, lockflags);
2404 * Take an extra reference, because we'll return
2407 ASSERT(ip->i_udquot);
2414 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
2415 if (ip->i_d.di_gid != gid) {
2416 xfs_iunlock(ip, lockflags);
2417 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
2424 ASSERT(error != ENOENT);
2428 lockflags = XFS_ILOCK_SHARED;
2429 xfs_ilock(ip, lockflags);
2431 ASSERT(ip->i_gdquot);
2437 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
2438 if (ip->i_d.di_projid != prid) {
2439 xfs_iunlock(ip, lockflags);
2440 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
2447 ASSERT(error != ENOENT);
2451 lockflags = XFS_ILOCK_SHARED;
2452 xfs_ilock(ip, lockflags);
2454 ASSERT(ip->i_gdquot);
2462 trace_xfs_dquot_dqalloc(ip);
2464 xfs_iunlock(ip, lockflags);
2477 * Actually transfer ownership, and do dquot modifications.
2478 * These were already reserved.
2484 xfs_dquot_t **IO_olddq,
2487 xfs_dquot_t *prevdq;
2488 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
2489 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
2492 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2493 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
2498 ASSERT(prevdq != newdq);
2500 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
2501 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
2503 /* the sparkling new dquot */
2504 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
2505 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
2508 * Take an extra reference, because the inode
2509 * is going to keep this dquot pointer even
2510 * after the trans_commit.
2514 xfs_dqunlock(newdq);
2521 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
2524 xfs_qm_vop_chown_reserve(
2531 xfs_mount_t *mp = ip->i_mount;
2532 uint delblks, blkflags, prjflags = 0;
2533 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
2537 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
2538 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2540 delblks = ip->i_delayed_blks;
2541 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
2542 blkflags = XFS_IS_REALTIME_INODE(ip) ?
2543 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
2545 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
2546 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
2549 * If there are delayed allocation blocks, then we have to
2550 * unreserve those from the old dquot, and add them to the
2554 ASSERT(ip->i_udquot);
2555 unresudq = ip->i_udquot;
2558 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
2559 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
2560 ip->i_d.di_projid != be32_to_cpu(gdqp->q_core.d_id))
2561 prjflags = XFS_QMOPT_ENOSPC;
2564 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
2565 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
2568 ASSERT(ip->i_gdquot);
2569 unresgdq = ip->i_gdquot;
2574 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2575 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
2576 flags | blkflags | prjflags)))
2580 * Do the delayed blks reservations/unreservations now. Since, these
2581 * are done without the help of a transaction, if a reservation fails
2582 * its previous reservations won't be automatically undone by trans
2583 * code. So, we have to do it manually here.
2587 * Do the reservations first. Unreservation can't fail.
2589 ASSERT(delblksudq || delblksgdq);
2590 ASSERT(unresudq || unresgdq);
2591 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2592 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
2593 flags | blkflags | prjflags)))
2595 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2596 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
2604 xfs_qm_vop_rename_dqattach(
2605 struct xfs_inode **i_tab)
2607 struct xfs_mount *mp = i_tab[0]->i_mount;
2610 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2613 for (i = 0; (i < 4 && i_tab[i]); i++) {
2614 struct xfs_inode *ip = i_tab[i];
2618 * Watch out for duplicate entries in the table.
2620 if (i == 0 || ip != i_tab[i-1]) {
2621 if (XFS_NOT_DQATTACHED(mp, ip)) {
2622 error = xfs_qm_dqattach(ip, 0);
2632 xfs_qm_vop_create_dqattach(
2633 struct xfs_trans *tp,
2634 struct xfs_inode *ip,
2635 struct xfs_dquot *udqp,
2636 struct xfs_dquot *gdqp)
2638 struct xfs_mount *mp = tp->t_mountp;
2640 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
2643 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2644 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2650 ASSERT(ip->i_udquot == NULL);
2651 ip->i_udquot = udqp;
2652 ASSERT(XFS_IS_UQUOTA_ON(mp));
2653 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
2654 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2660 ASSERT(ip->i_gdquot == NULL);
2661 ip->i_gdquot = gdqp;
2662 ASSERT(XFS_IS_OQUOTA_ON(mp));
2663 ASSERT((XFS_IS_GQUOTA_ON(mp) ?
2664 ip->i_d.di_gid : ip->i_d.di_projid) ==
2665 be32_to_cpu(gdqp->q_core.d_id));
2666 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2670 /* ------------- list stuff -----------------*/
2672 xfs_qm_freelist_init(xfs_frlist_t *ql)
2674 ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql;
2675 mutex_init(&ql->qh_lock);
2681 xfs_qm_freelist_destroy(xfs_frlist_t *ql)
2683 xfs_dquot_t *dqp, *nextdqp;
2685 mutex_lock(&ql->qh_lock);
2686 for (dqp = ql->qh_next;
2687 dqp != (xfs_dquot_t *)ql; ) {
2689 nextdqp = dqp->dq_flnext;
2691 cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp);
2693 XQM_FREELIST_REMOVE(dqp);
2695 xfs_qm_dqdestroy(dqp);
2698 mutex_unlock(&ql->qh_lock);
2699 mutex_destroy(&ql->qh_lock);
2701 ASSERT(ql->qh_nelems == 0);
2705 xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq)
2707 dq->dq_flnext = ql->qh_next;
2708 dq->dq_flprev = (xfs_dquot_t *)ql;
2710 dq->dq_flnext->dq_flprev = dq;
2711 xfs_Gqm->qm_dqfreelist.qh_nelems++;
2712 xfs_Gqm->qm_dqfreelist.qh_version++;
2716 xfs_qm_freelist_unlink(xfs_dquot_t *dq)
2718 xfs_dquot_t *next = dq->dq_flnext;
2719 xfs_dquot_t *prev = dq->dq_flprev;
2721 next->dq_flprev = prev;
2722 prev->dq_flnext = next;
2723 dq->dq_flnext = dq->dq_flprev = dq;
2724 xfs_Gqm->qm_dqfreelist.qh_nelems--;
2725 xfs_Gqm->qm_dqfreelist.qh_version++;
2729 xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq)
2731 xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq);