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"
47 #include "xfs_buf_item.h"
48 #include "xfs_trans_space.h"
49 #include "xfs_utils.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
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 *);
72 STATIC int xfs_qm_mplist_nowait(xfs_mount_t *);
73 STATIC int xfs_qm_dqhashlock_nowait(xfs_dquot_t *);
75 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
76 STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
77 STATIC int xfs_qm_shake(int, gfp_t);
79 static struct shrinker xfs_qm_shaker = {
80 .shrink = xfs_qm_shake,
81 .seeks = DEFAULT_SEEKS,
85 extern mutex_t qcheck_lock;
89 #define XQM_LIST_PRINT(l, NXT, title) \
91 xfs_dquot_t *dqp; int i = 0; \
92 cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
93 for (dqp = (l)->qh_next; dqp != NULL; dqp = dqp->NXT) { \
94 cmn_err(CE_DEBUG, " %d. \"%d (%s)\" " \
95 "bcnt = %d, icnt = %d, refs = %d", \
96 ++i, (int) be32_to_cpu(dqp->q_core.d_id), \
97 DQFLAGTO_TYPESTR(dqp), \
98 (int) be64_to_cpu(dqp->q_core.d_bcount), \
99 (int) be64_to_cpu(dqp->q_core.d_icount), \
100 (int) dqp->q_nrefs); } \
103 #define XQM_LIST_PRINT(l, NXT, title) do { } while (0)
107 * Initialize the XQM structure.
108 * Note that there is not one quota manager per file system.
110 STATIC struct xfs_qm *
113 xfs_dqhash_t *udqhash, *gdqhash;
119 * Initialize the dquot hash tables.
121 udqhash = kmem_zalloc_greedy(&hsize,
122 XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t),
123 XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t),
124 KM_SLEEP | KM_MAYFAIL | KM_LARGE);
125 gdqhash = kmem_zalloc(hsize, KM_SLEEP | KM_LARGE);
126 hsize /= sizeof(xfs_dqhash_t);
129 xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
130 xqm->qm_dqhashmask = hsize - 1;
131 xqm->qm_usr_dqhtable = udqhash;
132 xqm->qm_grp_dqhtable = gdqhash;
133 ASSERT(xqm->qm_usr_dqhtable != NULL);
134 ASSERT(xqm->qm_grp_dqhtable != NULL);
136 for (i = 0; i < hsize; i++) {
137 xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i);
138 xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i);
142 * Freelist of all dquots of all file systems
144 xfs_qm_freelist_init(&(xqm->qm_dqfreelist));
147 * dquot zone. we register our own low-memory callback.
150 xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t),
152 qm_dqzone = xqm->qm_dqzone;
154 xqm->qm_dqzone = qm_dqzone;
156 register_shrinker(&xfs_qm_shaker);
159 * The t_dqinfo portion of transactions.
162 xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t),
164 qm_dqtrxzone = xqm->qm_dqtrxzone;
166 xqm->qm_dqtrxzone = qm_dqtrxzone;
168 atomic_set(&xqm->qm_totaldquots, 0);
169 xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO;
172 mutex_init(&qcheck_lock);
178 * Destroy the global quota manager when its reference count goes to zero.
187 ASSERT(xqm->qm_nrefs == 0);
188 unregister_shrinker(&xfs_qm_shaker);
189 hsize = xqm->qm_dqhashmask + 1;
190 for (i = 0; i < hsize; i++) {
191 xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
192 xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
194 kmem_free(xqm->qm_usr_dqhtable);
195 kmem_free(xqm->qm_grp_dqhtable);
196 xqm->qm_usr_dqhtable = NULL;
197 xqm->qm_grp_dqhtable = NULL;
198 xqm->qm_dqhashmask = 0;
199 xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist));
201 mutex_destroy(&qcheck_lock);
207 * Called at mount time to let XQM know that another file system is
208 * starting quotas. This isn't crucial information as the individual mount
209 * structures are pretty independent, but it helps the XQM keep a
210 * global view of what's going on.
214 xfs_qm_hold_quotafs_ref(
215 struct xfs_mount *mp)
218 * Need to lock the xfs_Gqm structure for things like this. For example,
219 * the structure could disappear between the entry to this routine and
220 * a HOLD operation if not locked.
222 XFS_QM_LOCK(xfs_Gqm);
225 xfs_Gqm = xfs_Gqm_init();
227 * We can keep a list of all filesystems with quotas mounted for
228 * debugging and statistical purposes, but ...
229 * Just take a reference and get out.
231 XFS_QM_HOLD(xfs_Gqm);
232 XFS_QM_UNLOCK(xfs_Gqm);
239 * Release the reference that a filesystem took at mount time,
240 * so that we know when we need to destroy the entire quota manager.
244 xfs_qm_rele_quotafs_ref(
245 struct xfs_mount *mp)
247 xfs_dquot_t *dqp, *nextdqp;
250 ASSERT(xfs_Gqm->qm_nrefs > 0);
253 * Go thru the freelist and destroy all inactive dquots.
255 xfs_qm_freelist_lock(xfs_Gqm);
257 for (dqp = xfs_Gqm->qm_dqfreelist.qh_next;
258 dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) {
260 nextdqp = dqp->dq_flnext;
261 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
262 ASSERT(dqp->q_mount == NULL);
263 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
264 ASSERT(dqp->HL_PREVP == NULL);
265 ASSERT(dqp->MPL_PREVP == NULL);
266 XQM_FREELIST_REMOVE(dqp);
268 xfs_qm_dqdestroy(dqp);
274 xfs_qm_freelist_unlock(xfs_Gqm);
277 * Destroy the entire XQM. If somebody mounts with quotaon, this'll
280 XFS_QM_LOCK(xfs_Gqm);
281 XFS_QM_RELE(xfs_Gqm);
282 if (xfs_Gqm->qm_nrefs == 0) {
283 xfs_qm_destroy(xfs_Gqm);
286 XFS_QM_UNLOCK(xfs_Gqm);
290 * Just destroy the quotainfo structure.
293 xfs_qm_unmount_quotadestroy(
297 xfs_qm_destroy_quotainfo(mp);
302 * This is called from xfs_mountfs to start quotas and initialize all
303 * necessary data structures like quotainfo. This is also responsible for
304 * running a quotacheck as necessary. We are guaranteed that the superblock
305 * is consistently read in at this point.
307 * If we fail here, the mount will continue with quota turned off. We don't
308 * need to inidicate success or failure at all.
318 * If quotas on realtime volumes is not supported, we disable
319 * quotas immediately.
321 if (mp->m_sb.sb_rextents) {
323 "Cannot turn on quotas for realtime filesystem %s",
329 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
332 * Allocate the quotainfo structure inside the mount struct, and
333 * create quotainode(s), and change/rev superblock if necessary.
335 error = xfs_qm_init_quotainfo(mp);
338 * We must turn off quotas.
340 ASSERT(mp->m_quotainfo == NULL);
345 * If any of the quotas are not consistent, do a quotacheck.
347 if (XFS_QM_NEED_QUOTACHECK(mp)) {
348 error = xfs_qm_quotacheck(mp);
350 /* Quotacheck failed and disabled quotas. */
355 * If one type of quotas is off, then it will lose its
356 * quotachecked status, since we won't be doing accounting for
359 if (!XFS_IS_UQUOTA_ON(mp))
360 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
361 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
362 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
366 * We actually don't have to acquire the m_sb_lock at all.
367 * This can only be called from mount, and that's single threaded. XXX
369 spin_lock(&mp->m_sb_lock);
370 sbf = mp->m_sb.sb_qflags;
371 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
372 spin_unlock(&mp->m_sb_lock);
374 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
375 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
377 * We could only have been turning quotas off.
378 * We aren't in very good shape actually because
379 * the incore structures are convinced that quotas are
380 * off, but the on disk superblock doesn't know that !
382 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
383 xfs_fs_cmn_err(CE_ALERT, mp,
384 "XFS mount_quotas: Superblock update failed!");
389 xfs_fs_cmn_err(CE_WARN, mp,
390 "Failed to initialize disk quotas.");
396 * Called from the vfsops layer.
399 xfs_qm_unmount_quotas(
402 xfs_inode_t *uqp, *gqp;
406 * Release the dquots that root inode, et al might be holding,
407 * before we flush quotas and blow away the quotainfo structure.
409 ASSERT(mp->m_rootip);
410 xfs_qm_dqdetach(mp->m_rootip);
412 xfs_qm_dqdetach(mp->m_rbmip);
414 xfs_qm_dqdetach(mp->m_rsumip);
417 * Flush out the quota inodes.
420 if (mp->m_quotainfo) {
421 if ((uqp = mp->m_quotainfo->qi_uquotaip) != NULL) {
422 xfs_ilock(uqp, XFS_ILOCK_EXCL);
424 error = xfs_iflush(uqp, XFS_IFLUSH_SYNC);
425 xfs_iunlock(uqp, XFS_ILOCK_EXCL);
426 if (unlikely(error == EFSCORRUPTED)) {
427 XFS_ERROR_REPORT("xfs_qm_unmount_quotas(1)",
428 XFS_ERRLEVEL_LOW, mp);
432 if ((gqp = mp->m_quotainfo->qi_gquotaip) != NULL) {
433 xfs_ilock(gqp, XFS_ILOCK_EXCL);
435 error = xfs_iflush(gqp, XFS_IFLUSH_SYNC);
436 xfs_iunlock(gqp, XFS_ILOCK_EXCL);
437 if (unlikely(error == EFSCORRUPTED)) {
438 XFS_ERROR_REPORT("xfs_qm_unmount_quotas(2)",
439 XFS_ERRLEVEL_LOW, mp);
446 mp->m_quotainfo->qi_uquotaip = NULL;
450 mp->m_quotainfo->qi_gquotaip = NULL;
453 return XFS_ERROR(error);
457 * Flush all dquots of the given file system to disk. The dquots are
458 * _not_ purged from memory here, just their data written to disk.
470 if (mp->m_quotainfo == NULL)
474 xfs_qm_mplist_lock(mp);
475 FOREACH_DQUOT_IN_MP(dqp, mp) {
477 if (! XFS_DQ_IS_DIRTY(dqp)) {
481 xfs_dqtrace_entry(dqp, "FLUSHALL: DQDIRTY");
482 /* XXX a sentinel would be better */
483 recl = XFS_QI_MPLRECLAIMS(mp);
484 if (!xfs_dqflock_nowait(dqp)) {
486 * If we can't grab the flush lock then check
487 * to see if the dquot has been flushed delayed
488 * write. If so, grab its buffer and send it
489 * out immediately. We'll be able to acquire
490 * the flush lock when the I/O completes.
492 xfs_qm_dqflock_pushbuf_wait(dqp);
495 * Let go of the mplist lock. We don't want to hold it
496 * across a disk write.
498 xfs_qm_mplist_unlock(mp);
499 error = xfs_qm_dqflush(dqp, flags);
504 xfs_qm_mplist_lock(mp);
505 if (recl != XFS_QI_MPLRECLAIMS(mp)) {
506 xfs_qm_mplist_unlock(mp);
507 /* XXX restart limit */
512 xfs_qm_mplist_unlock(mp);
517 * Release the group dquot pointers the user dquots may be
518 * carrying around as a hint. mplist is locked on entry and exit.
521 xfs_qm_detach_gdquots(
524 xfs_dquot_t *dqp, *gdqp;
528 ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
529 dqp = XFS_QI_MPLNEXT(mp);
532 if ((gdqp = dqp->q_gdquot)) {
534 dqp->q_gdquot = NULL;
540 * Can't hold the mplist lock across a dqput.
541 * XXXmust convert to marker based iterations here.
543 nrecl = XFS_QI_MPLRECLAIMS(mp);
544 xfs_qm_mplist_unlock(mp);
547 xfs_qm_mplist_lock(mp);
548 if (nrecl != XFS_QI_MPLRECLAIMS(mp))
556 * Go through all the incore dquots of this file system and take them
557 * off the mplist and hashlist, if the dquot type matches the dqtype
558 * parameter. This is used when turning off quota accounting for
559 * users and/or groups, as well as when the filesystem is unmounting.
564 uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/PQUOTA/GQUOTA */
569 xfs_dquot_t *nextdqp;
572 if (mp->m_quotainfo == NULL)
575 dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
576 dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0;
577 dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
579 xfs_qm_mplist_lock(mp);
582 * In the first pass through all incore dquots of this filesystem,
583 * we release the group dquot pointers the user dquots may be
584 * carrying around as a hint. We need to do this irrespective of
585 * what's being turned off.
587 xfs_qm_detach_gdquots(mp);
591 ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
593 * Try to get rid of all of the unwanted dquots. The idea is to
594 * get them off mplist and hashlist, but leave them on freelist.
596 dqp = XFS_QI_MPLNEXT(mp);
599 * It's OK to look at the type without taking dqlock here.
600 * We're holding the mplist lock here, and that's needed for
603 if ((dqp->dq_flags & dqtype) == 0) {
608 if (! xfs_qm_dqhashlock_nowait(dqp)) {
609 nrecl = XFS_QI_MPLRECLAIMS(mp);
610 xfs_qm_mplist_unlock(mp);
611 XFS_DQ_HASH_LOCK(dqp->q_hash);
612 xfs_qm_mplist_lock(mp);
615 * XXXTheoretically, we can get into a very long
616 * ping pong game here.
617 * No one can be adding dquots to the mplist at
618 * this point, but somebody might be taking things off.
620 if (nrecl != XFS_QI_MPLRECLAIMS(mp)) {
621 XFS_DQ_HASH_UNLOCK(dqp->q_hash);
627 * Take the dquot off the mplist and hashlist. It may remain on
628 * freelist in INACTIVE state.
630 nextdqp = dqp->MPL_NEXT;
631 nmisses += xfs_qm_dqpurge(dqp);
634 xfs_qm_mplist_unlock(mp);
646 * Purge the dquot cache.
647 * None of the dquots should really be busy at this point.
649 if (mp->m_quotainfo) {
650 while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
664 xfs_dquot_t *udqhint, /* hint */
665 xfs_dquot_t **IO_idqpp)
670 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
673 * See if we already have it in the inode itself. IO_idqpp is
674 * &i_udquot or &i_gdquot. This made the code look weird, but
675 * made the logic a lot simpler.
677 if ((dqp = *IO_idqpp)) {
680 xfs_dqtrace_entry(dqp, "DQATTACH: found in ip");
685 * udqhint is the i_udquot field in inode, and is non-NULL only
686 * when the type arg is group/project. Its purpose is to save a
687 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
690 ASSERT(!udqhint || type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
691 if (udqhint && !dolock)
695 * No need to take dqlock to look at the id.
696 * The ID can't change until it gets reclaimed, and it won't
697 * be reclaimed as long as we have a ref from inode and we hold
701 (dqp = udqhint->q_gdquot) &&
702 (be32_to_cpu(dqp->q_core.d_id) == id)) {
703 ASSERT(XFS_DQ_IS_LOCKED(udqhint));
706 ASSERT(*IO_idqpp == NULL);
710 xfs_dqunlock(udqhint);
715 * We can't hold a dquot lock when we call the dqget code.
716 * We'll deadlock in no time, because of (not conforming to)
717 * lock ordering - the inodelock comes before any dquot lock,
718 * and we may drop and reacquire the ilock in xfs_qm_dqget().
721 xfs_dqunlock(udqhint);
723 * Find the dquot from somewhere. This bumps the
724 * reference count of dquot and returns it locked.
725 * This can return ENOENT if dquot didn't exist on
726 * disk and we didn't ask it to allocate;
727 * ESRCH if quotas got turned off suddenly.
729 if ((error = xfs_qm_dqget(ip->i_mount, ip, id, type,
730 doalloc|XFS_QMOPT_DOWARN, &dqp))) {
731 if (udqhint && dolock)
736 xfs_dqtrace_entry(dqp, "DQATTACH: found by dqget");
738 * dqget may have dropped and re-acquired the ilock, but it guarantees
739 * that the dquot returned is the one that should go in the inode.
743 ASSERT(XFS_DQ_IS_LOCKED(dqp));
753 ASSERT(XFS_DQ_IS_LOCKED(dqp));
754 if (! xfs_qm_dqlock_nowait(udqhint)) {
763 ASSERT(XFS_DQ_IS_LOCKED(udqhint));
767 ASSERT(XFS_DQ_IS_LOCKED(dqp));
775 * Given a udquot and gdquot, attach a ptr to the group dquot in the
776 * udquot as a hint for future lookups. The idea sounds simple, but the
777 * execution isn't, because the udquot might have a group dquot attached
778 * already and getting rid of that gets us into lock ordering constraints.
779 * The process is complicated more by the fact that the dquots may or may not
780 * be locked on entry.
783 xfs_qm_dqattach_grouphint(
792 ASSERT(XFS_DQ_IS_LOCKED(udq));
793 ASSERT(XFS_DQ_IS_LOCKED(gdq));
799 if ((tmp = udq->q_gdquot)) {
806 udq->q_gdquot = NULL;
808 * We can't keep any dqlocks when calling dqrele,
809 * because the freelist lock comes before dqlocks.
815 * we took a hard reference once upon a time in dqget,
816 * so give it back when the udquot no longer points at it
817 * dqput() does the unlocking of the dquot.
825 ASSERT(XFS_DQ_IS_LOCKED(udq));
831 ASSERT(XFS_DQ_IS_LOCKED(udq));
832 ASSERT(XFS_DQ_IS_LOCKED(gdq));
834 * Somebody could have attached a gdquot here,
835 * when we dropped the uqlock. If so, just do nothing.
837 if (udq->q_gdquot == NULL) {
849 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
851 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
852 * If XFS_QMOPT_DQLOCK, the dquot(s) will be returned locked. This option pretty
853 * much made this code a complete mess, but it has been pretty useful.
854 * If XFS_QMOPT_ILOCKED, then inode sent is already locked EXCL.
855 * Inode may get unlocked and relocked in here, and the caller must deal with
863 xfs_mount_t *mp = ip->i_mount;
867 if ((! XFS_IS_QUOTA_ON(mp)) ||
868 (! XFS_NOT_DQATTACHED(mp, ip)) ||
869 (ip->i_ino == mp->m_sb.sb_uquotino) ||
870 (ip->i_ino == mp->m_sb.sb_gquotino))
873 ASSERT((flags & XFS_QMOPT_ILOCKED) == 0 ||
874 xfs_isilocked(ip, XFS_ILOCK_EXCL));
876 if (! (flags & XFS_QMOPT_ILOCKED))
877 xfs_ilock(ip, XFS_ILOCK_EXCL);
879 if (XFS_IS_UQUOTA_ON(mp)) {
880 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
881 flags & XFS_QMOPT_DQALLOC,
882 flags & XFS_QMOPT_DQLOCK,
883 NULL, &ip->i_udquot);
889 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
890 if (XFS_IS_OQUOTA_ON(mp)) {
891 error = XFS_IS_GQUOTA_ON(mp) ?
892 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
893 flags & XFS_QMOPT_DQALLOC,
894 flags & XFS_QMOPT_DQLOCK,
895 ip->i_udquot, &ip->i_gdquot) :
896 xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ,
897 flags & XFS_QMOPT_DQALLOC,
898 flags & XFS_QMOPT_DQLOCK,
899 ip->i_udquot, &ip->i_gdquot);
901 * Don't worry about the udquot that we may have
902 * attached above. It'll get detached, if not already.
910 * Attach this group quota to the user quota as a hint.
911 * This WON'T, in general, result in a thrash.
914 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
915 ASSERT(ip->i_udquot);
916 ASSERT(ip->i_gdquot);
919 * We may or may not have the i_udquot locked at this point,
920 * but this check is OK since we don't depend on the i_gdquot to
921 * be accurate 100% all the time. It is just a hint, and this
922 * will succeed in general.
924 if (ip->i_udquot->q_gdquot == ip->i_gdquot)
927 * Attach i_gdquot to the gdquot hint inside the i_udquot.
929 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot,
930 flags & XFS_QMOPT_DQLOCK);
938 if (flags & XFS_QMOPT_DQLOCK)
939 ASSERT(XFS_DQ_IS_LOCKED(ip->i_udquot));
942 if (flags & XFS_QMOPT_DQLOCK)
943 ASSERT(XFS_DQ_IS_LOCKED(ip->i_gdquot));
945 if (XFS_IS_UQUOTA_ON(mp))
946 ASSERT(ip->i_udquot);
947 if (XFS_IS_OQUOTA_ON(mp))
948 ASSERT(ip->i_gdquot);
952 if (! (flags & XFS_QMOPT_ILOCKED))
953 xfs_iunlock(ip, XFS_ILOCK_EXCL);
957 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
963 * Release dquots (and their references) if any.
964 * The inode should be locked EXCL except when this's called by
971 if (!(ip->i_udquot || ip->i_gdquot))
974 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
975 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
977 xfs_dqtrace_entry_ino(ip->i_udquot, "DQDETTACH", ip);
978 xfs_qm_dqrele(ip->i_udquot);
982 xfs_dqtrace_entry_ino(ip->i_gdquot, "DQDETTACH", ip);
983 xfs_qm_dqrele(ip->i_gdquot);
989 * This is called to sync quotas. We can be told to use non-blocking
990 * semantics by either the SYNC_BDFLUSH flag or the absence of the
1004 if (! XFS_IS_QUOTA_ON(mp))
1009 * We won't block unless we are asked to.
1011 nowait = (boolean_t)(flags & SYNC_BDFLUSH || (flags & SYNC_WAIT) == 0);
1014 xfs_qm_mplist_lock(mp);
1016 * dqpurge_all() also takes the mplist lock and iterate thru all dquots
1017 * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared
1018 * when we have the mplist lock, we know that dquots will be consistent
1019 * as long as we have it locked.
1021 if (! XFS_IS_QUOTA_ON(mp)) {
1022 xfs_qm_mplist_unlock(mp);
1025 FOREACH_DQUOT_IN_MP(dqp, mp) {
1027 * If this is vfs_sync calling, then skip the dquots that
1028 * don't 'seem' to be dirty. ie. don't acquire dqlock.
1029 * This is very similar to what xfs_sync does with inodes.
1031 if (flags & SYNC_BDFLUSH) {
1032 if (! XFS_DQ_IS_DIRTY(dqp))
1038 * Try to acquire the dquot lock. We are NOT out of
1039 * lock order, but we just don't want to wait for this
1040 * lock, unless somebody wanted us to.
1042 if (! xfs_qm_dqlock_nowait(dqp))
1049 * Now, find out for sure if this dquot is dirty or not.
1051 if (! XFS_DQ_IS_DIRTY(dqp)) {
1056 /* XXX a sentinel would be better */
1057 recl = XFS_QI_MPLRECLAIMS(mp);
1058 if (!xfs_dqflock_nowait(dqp)) {
1064 * If we can't grab the flush lock then if the caller
1065 * really wanted us to give this our best shot, so
1066 * see if we can give a push to the buffer before we wait
1067 * on the flush lock. At this point, we know that
1068 * even though the dquot is being flushed,
1069 * it has (new) dirty data.
1071 xfs_qm_dqflock_pushbuf_wait(dqp);
1074 * Let go of the mplist lock. We don't want to hold it
1075 * across a disk write
1077 flush_flags = (nowait) ? XFS_QMOPT_DELWRI : XFS_QMOPT_SYNC;
1078 xfs_qm_mplist_unlock(mp);
1079 xfs_dqtrace_entry(dqp, "XQM_SYNC: DQFLUSH");
1080 error = xfs_qm_dqflush(dqp, flush_flags);
1082 if (error && XFS_FORCED_SHUTDOWN(mp))
1083 return 0; /* Need to prevent umount failure */
1087 xfs_qm_mplist_lock(mp);
1088 if (recl != XFS_QI_MPLRECLAIMS(mp)) {
1089 if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS)
1092 xfs_qm_mplist_unlock(mp);
1097 xfs_qm_mplist_unlock(mp);
1103 * This initializes all the quota information that's kept in the
1107 xfs_qm_init_quotainfo(
1110 xfs_quotainfo_t *qinf;
1114 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1117 * Tell XQM that we exist as soon as possible.
1119 if ((error = xfs_qm_hold_quotafs_ref(mp))) {
1123 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
1126 * See if quotainodes are setup, and if not, allocate them,
1127 * and change the superblock accordingly.
1129 if ((error = xfs_qm_init_quotainos(mp))) {
1131 mp->m_quotainfo = NULL;
1135 xfs_qm_list_init(&qinf->qi_dqlist, "mpdqlist", 0);
1136 qinf->qi_dqreclaims = 0;
1138 /* mutex used to serialize quotaoffs */
1139 mutex_init(&qinf->qi_quotaofflock);
1141 /* Precalc some constants */
1142 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1143 ASSERT(qinf->qi_dqchunklen);
1144 qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
1145 do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
1147 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
1150 * We try to get the limits from the superuser's limits fields.
1151 * This is quite hacky, but it is standard quota practice.
1152 * We look at the USR dquot with id == 0 first, but if user quotas
1153 * are not enabled we goto the GRP dquot with id == 0.
1154 * We don't really care to keep separate default limits for user
1155 * and group quotas, at least not at this point.
1157 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0,
1158 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
1159 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
1161 XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN,
1164 xfs_disk_dquot_t *ddqp = &dqp->q_core;
1167 * The warnings and timers set the grace period given to
1168 * a user or group before he or she can not perform any
1169 * more writing. If it is zero, a default is used.
1171 qinf->qi_btimelimit = ddqp->d_btimer ?
1172 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
1173 qinf->qi_itimelimit = ddqp->d_itimer ?
1174 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
1175 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
1176 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
1177 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
1178 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
1179 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
1180 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
1181 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
1182 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
1183 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
1184 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
1185 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
1186 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
1187 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
1188 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
1191 * We sent the XFS_QMOPT_DQSUSER flag to dqget because
1192 * we don't want this dquot cached. We haven't done a
1193 * quotacheck yet, and quotacheck doesn't like incore dquots.
1195 xfs_qm_dqdestroy(dqp);
1197 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
1198 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
1199 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
1200 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
1201 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
1202 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
1210 * Gets called when unmounting a filesystem or when all quotas get
1212 * This purges the quota inodes, destroys locks and frees itself.
1215 xfs_qm_destroy_quotainfo(
1218 xfs_quotainfo_t *qi;
1220 qi = mp->m_quotainfo;
1222 ASSERT(xfs_Gqm != NULL);
1225 * Release the reference that XQM kept, so that we know
1226 * when the XQM structure should be freed. We cannot assume
1227 * that xfs_Gqm is non-null after this point.
1229 xfs_qm_rele_quotafs_ref(mp);
1231 xfs_qm_list_destroy(&qi->qi_dqlist);
1233 if (qi->qi_uquotaip) {
1234 IRELE(qi->qi_uquotaip);
1235 qi->qi_uquotaip = NULL; /* paranoia */
1237 if (qi->qi_gquotaip) {
1238 IRELE(qi->qi_gquotaip);
1239 qi->qi_gquotaip = NULL;
1241 mutex_destroy(&qi->qi_quotaofflock);
1243 mp->m_quotainfo = NULL;
1248 /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
1257 mutex_init(&list->qh_lock);
1258 list->qh_next = NULL;
1259 list->qh_version = 0;
1260 list->qh_nelems = 0;
1264 xfs_qm_list_destroy(
1267 mutex_destroy(&(list->qh_lock));
1272 * Stripped down version of dqattach. This doesn't attach, or even look at the
1273 * dquots attached to the inode. The rationale is that there won't be any
1274 * attached at the time this is called from quotacheck.
1277 xfs_qm_dqget_noattach(
1279 xfs_dquot_t **O_udqpp,
1280 xfs_dquot_t **O_gdqpp)
1284 xfs_dquot_t *udqp, *gdqp;
1286 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1291 if (XFS_IS_UQUOTA_ON(mp)) {
1292 ASSERT(ip->i_udquot == NULL);
1294 * We want the dquot allocated if it doesn't exist.
1296 if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER,
1297 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN,
1300 * Shouldn't be able to turn off quotas here.
1302 ASSERT(error != ESRCH);
1303 ASSERT(error != ENOENT);
1309 if (XFS_IS_OQUOTA_ON(mp)) {
1310 ASSERT(ip->i_gdquot == NULL);
1313 error = XFS_IS_GQUOTA_ON(mp) ?
1314 xfs_qm_dqget(mp, ip,
1315 ip->i_d.di_gid, XFS_DQ_GROUP,
1316 XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN,
1318 xfs_qm_dqget(mp, ip,
1319 ip->i_d.di_projid, XFS_DQ_PROJ,
1320 XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN,
1324 xfs_qm_dqrele(udqp);
1325 ASSERT(error != ESRCH);
1326 ASSERT(error != ENOENT);
1331 /* Reacquire the locks in the right order */
1333 if (! xfs_qm_dqlock_nowait(udqp)) {
1345 if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp));
1346 if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp));
1352 * Create an inode and return with a reference already taken, but unlocked
1353 * This is how we create quota inodes
1366 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
1367 if ((error = xfs_trans_reserve(tp,
1368 XFS_QM_QINOCREATE_SPACE_RES(mp),
1369 XFS_CREATE_LOG_RES(mp), 0,
1370 XFS_TRANS_PERM_LOG_RES,
1371 XFS_CREATE_LOG_COUNT))) {
1372 xfs_trans_cancel(tp, 0);
1376 if ((error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0,
1377 &xfs_zerocr, 0, 1, ip, &committed))) {
1378 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
1384 * Keep an extra reference to this quota inode. This inode is
1385 * locked exclusively and joined to the transaction already.
1387 ASSERT(xfs_isilocked(*ip, XFS_ILOCK_EXCL));
1391 * Make the changes in the superblock, and log those too.
1392 * sbfields arg may contain fields other than *QUOTINO;
1393 * VERSIONNUM for example.
1395 spin_lock(&mp->m_sb_lock);
1396 if (flags & XFS_QMOPT_SBVERSION) {
1397 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
1398 unsigned oldv = mp->m_sb.sb_versionnum;
1400 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
1401 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1402 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
1403 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1404 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
1406 xfs_sb_version_addquota(&mp->m_sb);
1407 mp->m_sb.sb_uquotino = NULLFSINO;
1408 mp->m_sb.sb_gquotino = NULLFSINO;
1410 /* qflags will get updated _after_ quotacheck */
1411 mp->m_sb.sb_qflags = 0;
1412 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
1414 "Old superblock version %x, converting to %x.",
1415 oldv, mp->m_sb.sb_versionnum);
1418 if (flags & XFS_QMOPT_UQUOTA)
1419 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1421 mp->m_sb.sb_gquotino = (*ip)->i_ino;
1422 spin_unlock(&mp->m_sb_lock);
1423 xfs_mod_sb(tp, sbfields);
1425 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
1426 xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!");
1434 xfs_qm_reset_dqcounts(
1440 xfs_disk_dquot_t *ddq;
1443 xfs_buftrace("RESET DQUOTS", bp);
1445 * Reset all counters and timers. They'll be
1446 * started afresh by xfs_qm_quotacheck.
1449 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1450 do_div(j, sizeof(xfs_dqblk_t));
1451 ASSERT(XFS_QM_DQPERBLK(mp) == j);
1453 ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp);
1454 for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) {
1456 * Do a sanity check, and if needed, repair the dqblk. Don't
1457 * output any warnings because it's perfectly possible to
1458 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
1460 (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1464 ddq->d_rtbcount = 0;
1467 ddq->d_rtbtimer = 0;
1470 ddq->d_rtbwarns = 0;
1471 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
1480 xfs_filblks_t blkcnt,
1491 incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ?
1492 XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt;
1493 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1494 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
1498 * Blkcnt arg can be a very big number, and might even be
1499 * larger than the log itself. So, we have to break it up into
1500 * manageable-sized transactions.
1501 * Note that we don't start a permanent transaction here; we might
1502 * not be able to get a log reservation for the whole thing up front,
1503 * and we don't really care to either, because we just discard
1504 * everything if we were to crash in the middle of this loop.
1507 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1508 XFS_FSB_TO_DADDR(mp, bno),
1509 (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp);
1513 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1514 xfs_bdwrite(mp, bp);
1516 * goto the next block.
1519 firstid += XFS_QM_DQPERBLK(mp);
1525 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1526 * caller supplied function for every chunk of dquots that we find.
1534 xfs_bmbt_irec_t *map;
1535 int i, nmaps; /* number of map entries */
1536 int error; /* return value */
1537 xfs_fileoff_t lblkno;
1538 xfs_filblks_t maxlblkcnt;
1540 xfs_fsblock_t rablkno;
1541 xfs_filblks_t rablkcnt;
1545 * This looks racy, but we can't keep an inode lock across a
1546 * trans_reserve. But, this gets called during quotacheck, and that
1547 * happens only at mount time which is single threaded.
1549 if (qip->i_d.di_nblocks == 0)
1552 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1555 maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1557 nmaps = XFS_DQITER_MAP_SIZE;
1559 * We aren't changing the inode itself. Just changing
1560 * some of its data. No new blocks are added here, and
1561 * the inode is never added to the transaction.
1563 xfs_ilock(qip, XFS_ILOCK_SHARED);
1564 error = xfs_bmapi(NULL, qip, lblkno,
1565 maxlblkcnt - lblkno,
1568 0, map, &nmaps, NULL, NULL);
1569 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1573 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1574 for (i = 0; i < nmaps; i++) {
1575 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1576 ASSERT(map[i].br_blockcount);
1579 lblkno += map[i].br_blockcount;
1581 if (map[i].br_startblock == HOLESTARTBLOCK)
1584 firstid = (xfs_dqid_t) map[i].br_startoff *
1585 XFS_QM_DQPERBLK(mp);
1587 * Do a read-ahead on the next extent.
1589 if ((i+1 < nmaps) &&
1590 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1591 rablkcnt = map[i+1].br_blockcount;
1592 rablkno = map[i+1].br_startblock;
1593 while (rablkcnt--) {
1594 xfs_baread(mp->m_ddev_targp,
1595 XFS_FSB_TO_DADDR(mp, rablkno),
1596 (int)XFS_QI_DQCHUNKLEN(mp));
1601 * Iterate thru all the blks in the extent and
1602 * reset the counters of all the dquots inside them.
1604 if ((error = xfs_qm_dqiter_bufs(mp,
1606 map[i].br_startblock,
1607 map[i].br_blockcount,
1615 } while (nmaps > 0);
1623 * Called by dqusage_adjust in doing a quotacheck.
1624 * Given the inode, and a dquot (either USR or GRP, doesn't matter),
1625 * this updates its incore copy as well as the buffer copy. This is
1626 * so that once the quotacheck is done, we can just log all the buffers,
1627 * as opposed to logging numerous updates to individual dquots.
1630 xfs_qm_quotacheck_dqadjust(
1635 ASSERT(XFS_DQ_IS_LOCKED(dqp));
1636 xfs_dqtrace_entry(dqp, "QCHECK DQADJUST");
1638 * Adjust the inode count and the block count to reflect this inode's
1641 be64_add_cpu(&dqp->q_core.d_icount, 1);
1642 dqp->q_res_icount++;
1644 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1645 dqp->q_res_bcount += nblks;
1648 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1649 dqp->q_res_rtbcount += rtblks;
1653 * Set default limits, adjust timers (since we changed usages)
1655 if (! XFS_IS_SUSER_DQUOT(dqp)) {
1656 xfs_qm_adjust_dqlimits(dqp->q_mount, &dqp->q_core);
1657 xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core);
1660 dqp->dq_flags |= XFS_DQ_DIRTY;
1666 xfs_qcnt_t *O_rtblks)
1668 xfs_filblks_t rtblks; /* total rt blks */
1669 xfs_extnum_t idx; /* extent record index */
1670 xfs_ifork_t *ifp; /* inode fork pointer */
1671 xfs_extnum_t nextents; /* number of extent entries */
1674 ASSERT(XFS_IS_REALTIME_INODE(ip));
1675 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1676 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1677 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1681 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1682 for (idx = 0; idx < nextents; idx++)
1683 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1684 *O_rtblks = (xfs_qcnt_t)rtblks;
1689 * callback routine supplied to bulkstat(). Given an inumber, find its
1690 * dquots and update them to account for resources taken by that inode.
1694 xfs_qm_dqusage_adjust(
1695 xfs_mount_t *mp, /* mount point for filesystem */
1696 xfs_ino_t ino, /* inode number to get data for */
1697 void __user *buffer, /* not used */
1698 int ubsize, /* not used */
1699 void *private_data, /* not used */
1700 xfs_daddr_t bno, /* starting block of inode cluster */
1701 int *ubused, /* not used */
1702 void *dip, /* on-disk inode pointer (not used) */
1703 int *res) /* result code value */
1706 xfs_dquot_t *udqp, *gdqp;
1707 xfs_qcnt_t nblks, rtblks;
1710 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1713 * rootino must have its resources accounted for, not so with the quota
1716 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1717 *res = BULKSTAT_RV_NOTHING;
1718 return XFS_ERROR(EINVAL);
1722 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1723 * interface expects the inode to be exclusively locked because that's
1724 * the case in all other instances. It's OK that we do this because
1725 * quotacheck is done only at mount time.
1727 if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) {
1728 *res = BULKSTAT_RV_NOTHING;
1733 * Obtain the locked dquots. In case of an error (eg. allocation
1734 * fails for ENOSPC), we return the negative of the error number
1735 * to bulkstat, so that it can get propagated to quotacheck() and
1736 * making us disable quotas for the file system.
1738 if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) {
1739 xfs_iput(ip, XFS_ILOCK_EXCL);
1740 *res = BULKSTAT_RV_GIVEUP;
1745 if (! XFS_IS_REALTIME_INODE(ip)) {
1746 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks;
1749 * Walk thru the extent list and count the realtime blocks.
1751 if ((error = xfs_qm_get_rtblks(ip, &rtblks))) {
1752 xfs_iput(ip, XFS_ILOCK_EXCL);
1757 *res = BULKSTAT_RV_GIVEUP;
1760 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1762 ASSERT(ip->i_delayed_blks == 0);
1765 * We can't release the inode while holding its dquot locks.
1766 * The inode can go into inactive and might try to acquire the dquotlocks.
1767 * So, just unlock here and do a vn_rele at the end.
1769 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1772 * Add the (disk blocks and inode) resources occupied by this
1773 * inode to its dquots. We do this adjustment in the incore dquot,
1774 * and also copy the changes to its buffer.
1775 * We don't care about putting these changes in a transaction
1776 * envelope because if we crash in the middle of a 'quotacheck'
1777 * we have to start from the beginning anyway.
1778 * Once we're done, we'll log all the dquot bufs.
1780 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1781 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1783 if (XFS_IS_UQUOTA_ON(mp)) {
1785 xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks);
1788 if (XFS_IS_OQUOTA_ON(mp)) {
1790 xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks);
1794 * Now release the inode. This will send it to 'inactive', and
1795 * possibly even free blocks.
1802 *res = BULKSTAT_RV_DIDONE;
1807 * Walk thru all the filesystem inodes and construct a consistent view
1808 * of the disk quota world. If the quotacheck fails, disable quotas.
1814 int done, count, error;
1817 xfs_inode_t *uip, *gip;
1825 ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp));
1826 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1829 * There should be no cached dquots. The (simplistic) quotacheck
1830 * algorithm doesn't like that.
1832 ASSERT(XFS_QI_MPLNDQUOTS(mp) == 0);
1834 cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname);
1837 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1838 * their counters to zero. We need a clean slate.
1839 * We don't log our changes till later.
1841 if ((uip = XFS_QI_UQIP(mp))) {
1842 if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA)))
1844 flags |= XFS_UQUOTA_CHKD;
1847 if ((gip = XFS_QI_GQIP(mp))) {
1848 if ((error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
1849 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA)))
1851 flags |= XFS_OQUOTA_CHKD;
1856 * Iterate thru all the inodes in the file system,
1857 * adjusting the corresponding dquot counters in core.
1859 if ((error = xfs_bulkstat(mp, &lastino, &count,
1860 xfs_qm_dqusage_adjust, NULL,
1861 structsz, NULL, BULKSTAT_FG_IGET, &done)))
1867 * We've made all the changes that we need to make incore.
1868 * Flush them down to disk buffers if everything was updated
1872 error = xfs_qm_dqflush_all(mp, XFS_QMOPT_DELWRI);
1875 * We can get this error if we couldn't do a dquot allocation inside
1876 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1877 * dirty dquots that might be cached, we just want to get rid of them
1878 * and turn quotaoff. The dquots won't be attached to any of the inodes
1879 * at this point (because we intentionally didn't in dqget_noattach).
1882 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_QUOTAOFF);
1887 * We didn't log anything, because if we crashed, we'll have to
1888 * start the quotacheck from scratch anyway. However, we must make
1889 * sure that our dquot changes are secure before we put the
1890 * quotacheck'd stamp on the superblock. So, here we do a synchronous
1893 XFS_bflush(mp->m_ddev_targp);
1896 * If one type of quotas is off, then it will lose its
1897 * quotachecked status, since we won't be doing accounting for
1898 * that type anymore.
1900 mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
1901 mp->m_qflags |= flags;
1903 XQM_LIST_PRINT(&(XFS_QI_MPL_LIST(mp)), MPL_NEXT, "++++ Mp list +++");
1907 cmn_err(CE_WARN, "XFS quotacheck %s: Unsuccessful (Error %d): "
1908 "Disabling quotas.",
1909 mp->m_fsname, error);
1911 * We must turn off quotas.
1913 ASSERT(mp->m_quotainfo != NULL);
1914 ASSERT(xfs_Gqm != NULL);
1915 xfs_qm_destroy_quotainfo(mp);
1916 if (xfs_mount_reset_sbqflags(mp)) {
1917 cmn_err(CE_WARN, "XFS quotacheck %s: "
1918 "Failed to reset quota flags.", mp->m_fsname);
1921 cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname);
1927 * This is called after the superblock has been read in and we're ready to
1928 * iget the quota inodes.
1931 xfs_qm_init_quotainos(
1934 xfs_inode_t *uip, *gip;
1939 ASSERT(mp->m_quotainfo);
1945 * Get the uquota and gquota inodes
1947 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1948 if (XFS_IS_UQUOTA_ON(mp) &&
1949 mp->m_sb.sb_uquotino != NULLFSINO) {
1950 ASSERT(mp->m_sb.sb_uquotino > 0);
1951 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1953 return XFS_ERROR(error);
1955 if (XFS_IS_OQUOTA_ON(mp) &&
1956 mp->m_sb.sb_gquotino != NULLFSINO) {
1957 ASSERT(mp->m_sb.sb_gquotino > 0);
1958 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1962 return XFS_ERROR(error);
1966 flags |= XFS_QMOPT_SBVERSION;
1967 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1968 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
1972 * Create the two inodes, if they don't exist already. The changes
1973 * made above will get added to a transaction and logged in one of
1974 * the qino_alloc calls below. If the device is readonly,
1975 * temporarily switch to read-write to do this.
1977 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1978 if ((error = xfs_qm_qino_alloc(mp, &uip,
1979 sbflags | XFS_SB_UQUOTINO,
1980 flags | XFS_QMOPT_UQUOTA)))
1981 return XFS_ERROR(error);
1983 flags &= ~XFS_QMOPT_SBVERSION;
1985 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
1986 flags |= (XFS_IS_GQUOTA_ON(mp) ?
1987 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1988 error = xfs_qm_qino_alloc(mp, &gip,
1989 sbflags | XFS_SB_GQUOTINO, flags);
1994 return XFS_ERROR(error);
1998 XFS_QI_UQIP(mp) = uip;
1999 XFS_QI_GQIP(mp) = gip;
2006 * Traverse the freelist of dquots and attempt to reclaim a maximum of
2007 * 'howmany' dquots. This operation races with dqlookup(), and attempts to
2008 * favor the lookup function ...
2009 * XXXsup merge this with qm_reclaim_one().
2012 xfs_qm_shake_freelist(
2017 xfs_dquot_t *dqp, *nextdqp;
2029 cmn_err(CE_DEBUG, "Shake free 0x%x", howmany);
2031 /* lock order is : hashchainlock, freelistlock, mplistlock */
2033 xfs_qm_freelist_lock(xfs_Gqm);
2035 for (dqp = xfs_Gqm->qm_dqfreelist.qh_next;
2036 ((dqp != (xfs_dquot_t *) &xfs_Gqm->qm_dqfreelist) &&
2037 nreclaimed < howmany); ) {
2041 * We are racing with dqlookup here. Naturally we don't
2042 * want to reclaim a dquot that lookup wants.
2044 if (dqp->dq_flags & XFS_DQ_WANT) {
2046 xfs_qm_freelist_unlock(xfs_Gqm);
2047 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2049 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
2054 * If the dquot is inactive, we are assured that it is
2055 * not on the mplist or the hashlist, and that makes our
2058 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
2059 ASSERT(dqp->q_mount == NULL);
2060 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
2061 ASSERT(dqp->HL_PREVP == NULL);
2062 ASSERT(dqp->MPL_PREVP == NULL);
2063 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
2064 nextdqp = dqp->dq_flnext;
2068 ASSERT(dqp->MPL_PREVP);
2070 * Try to grab the flush lock. If this dquot is in the process of
2071 * getting flushed to disk, we don't want to reclaim it.
2073 if (!xfs_dqflock_nowait(dqp)) {
2075 dqp = dqp->dq_flnext;
2080 * We have the flush lock so we know that this is not in the
2081 * process of being flushed. So, if this is dirty, flush it
2082 * DELWRI so that we don't get a freelist infested with
2085 if (XFS_DQ_IS_DIRTY(dqp)) {
2087 xfs_dqtrace_entry(dqp, "DQSHAKE: DQDIRTY");
2089 * We flush it delayed write, so don't bother
2090 * releasing the mplock.
2092 error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
2094 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
2095 "xfs_qm_dqflush_all: dquot %p flush failed", dqp);
2097 xfs_dqunlock(dqp); /* dqflush unlocks dqflock */
2098 dqp = dqp->dq_flnext;
2102 * We're trying to get the hashlock out of order. This races
2103 * with dqlookup; so, we giveup and goto the next dquot if
2104 * we couldn't get the hashlock. This way, we won't starve
2105 * a dqlookup process that holds the hashlock that is
2106 * waiting for the freelist lock.
2108 if (! xfs_qm_dqhashlock_nowait(dqp)) {
2111 dqp = dqp->dq_flnext;
2115 * This races with dquot allocation code as well as dqflush_all
2116 * and reclaim code. So, if we failed to grab the mplist lock,
2117 * giveup everything and start over.
2121 if (! xfs_qm_mplist_nowait(dqp->q_mount)) {
2122 /* XXX put a sentinel so that we can come back here */
2125 XFS_DQ_HASH_UNLOCK(hash);
2126 xfs_qm_freelist_unlock(xfs_Gqm);
2127 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2131 xfs_dqtrace_entry(dqp, "DQSHAKE: UNLINKING");
2133 cmn_err(CE_DEBUG, "Shake 0x%p, ID 0x%x\n",
2134 dqp, be32_to_cpu(dqp->q_core.d_id));
2136 ASSERT(dqp->q_nrefs == 0);
2137 nextdqp = dqp->dq_flnext;
2138 XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp);
2139 XQM_HASHLIST_REMOVE(hash, dqp);
2141 xfs_qm_mplist_unlock(dqp->q_mount);
2142 XFS_DQ_HASH_UNLOCK(hash);
2145 XQM_FREELIST_REMOVE(dqp);
2148 XQM_STATS_INC(xqmstats.xs_qm_dqshake_reclaims);
2149 xfs_qm_dqdestroy(dqp);
2152 xfs_qm_freelist_unlock(xfs_Gqm);
2158 * The kmem_shake interface is invoked when memory is running low.
2162 xfs_qm_shake(int nr_to_scan, gfp_t gfp_mask)
2164 int ndqused, nfree, n;
2166 if (!kmem_shake_allow(gfp_mask))
2171 nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */
2172 /* incore dquots in all f/s's */
2173 ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree;
2175 ASSERT(ndqused >= 0);
2177 if (nfree <= ndqused && nfree < ndquot)
2180 ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */
2181 n = nfree - ndqused - ndquot; /* # over target */
2183 return xfs_qm_shake_freelist(MAX(nfree, n));
2188 * Just pop the least recently used dquot off the freelist and
2189 * recycle it. The returned dquot is locked.
2191 STATIC xfs_dquot_t *
2192 xfs_qm_dqreclaim_one(void)
2194 xfs_dquot_t *dqpout;
2203 /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */
2205 xfs_qm_freelist_lock(xfs_Gqm);
2207 FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) {
2211 * We are racing with dqlookup here. Naturally we don't
2212 * want to reclaim a dquot that lookup wants. We release the
2213 * freelist lock and start over, so that lookup will grab
2214 * both the dquot and the freelistlock.
2216 if (dqp->dq_flags & XFS_DQ_WANT) {
2217 ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE));
2218 xfs_dqtrace_entry(dqp, "DQRECLAIM: DQWANT");
2220 xfs_qm_freelist_unlock(xfs_Gqm);
2221 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2223 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
2228 * If the dquot is inactive, we are assured that it is
2229 * not on the mplist or the hashlist, and that makes our
2232 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
2233 ASSERT(dqp->q_mount == NULL);
2234 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
2235 ASSERT(dqp->HL_PREVP == NULL);
2236 ASSERT(dqp->MPL_PREVP == NULL);
2237 XQM_FREELIST_REMOVE(dqp);
2240 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
2244 ASSERT(dqp->q_hash);
2245 ASSERT(dqp->MPL_PREVP);
2248 * Try to grab the flush lock. If this dquot is in the process of
2249 * getting flushed to disk, we don't want to reclaim it.
2251 if (!xfs_dqflock_nowait(dqp)) {
2257 * We have the flush lock so we know that this is not in the
2258 * process of being flushed. So, if this is dirty, flush it
2259 * DELWRI so that we don't get a freelist infested with
2262 if (XFS_DQ_IS_DIRTY(dqp)) {
2264 xfs_dqtrace_entry(dqp, "DQRECLAIM: DQDIRTY");
2266 * We flush it delayed write, so don't bother
2267 * releasing the freelist lock.
2269 error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
2271 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
2272 "xfs_qm_dqreclaim: dquot %p flush failed", dqp);
2274 xfs_dqunlock(dqp); /* dqflush unlocks dqflock */
2278 if (! xfs_qm_mplist_nowait(dqp->q_mount)) {
2284 if (! xfs_qm_dqhashlock_nowait(dqp))
2287 ASSERT(dqp->q_nrefs == 0);
2288 xfs_dqtrace_entry(dqp, "DQRECLAIM: UNLINKING");
2289 XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp);
2290 XQM_HASHLIST_REMOVE(dqp->q_hash, dqp);
2291 XQM_FREELIST_REMOVE(dqp);
2293 XFS_DQ_HASH_UNLOCK(dqp->q_hash);
2295 xfs_qm_mplist_unlock(dqp->q_mount);
2302 xfs_qm_freelist_unlock(xfs_Gqm);
2307 /*------------------------------------------------------------------*/
2310 * Return a new incore dquot. Depending on the number of
2311 * dquots in the system, we either allocate a new one on the kernel heap,
2312 * or reclaim a free one.
2313 * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed
2314 * to reclaim an existing one from the freelist.
2317 xfs_qm_dqalloc_incore(
2318 xfs_dquot_t **O_dqpp)
2323 * Check against high water mark to see if we want to pop
2324 * a nincompoop dquot off the freelist.
2326 if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) {
2328 * Try to recycle a dquot from the freelist.
2330 if ((dqp = xfs_qm_dqreclaim_one())) {
2331 XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
2333 * Just zero the core here. The rest will get
2334 * reinitialized by caller. XXX we shouldn't even
2337 memset(&dqp->q_core, 0, sizeof(dqp->q_core));
2341 XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
2345 * Allocate a brand new dquot on the kernel heap and return it
2346 * to the caller to initialize.
2348 ASSERT(xfs_Gqm->qm_dqzone != NULL);
2349 *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP);
2350 atomic_inc(&xfs_Gqm->qm_totaldquots);
2357 * Start a transaction and write the incore superblock changes to
2358 * disk. flags parameter indicates which fields have changed.
2361 xfs_qm_write_sb_changes(
2369 cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname);
2371 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
2372 if ((error = xfs_trans_reserve(tp, 0,
2373 mp->m_sb.sb_sectsize + 128, 0,
2375 XFS_DEFAULT_LOG_COUNT))) {
2376 xfs_trans_cancel(tp, 0);
2380 xfs_mod_sb(tp, flags);
2381 error = xfs_trans_commit(tp, 0);
2387 /* --------------- utility functions for vnodeops ---------------- */
2391 * Given an inode, a uid and gid (from cred_t) make sure that we have
2392 * allocated relevant dquot(s) on disk, and that we won't exceed inode
2393 * quotas by creating this file.
2394 * This also attaches dquot(s) to the given inode after locking it,
2395 * and returns the dquots corresponding to the uid and/or gid.
2397 * in : inode (unlocked)
2398 * out : udquot, gdquot with references taken and unlocked
2408 xfs_dquot_t **O_udqpp,
2409 xfs_dquot_t **O_gdqpp)
2412 xfs_dquot_t *uq, *gq;
2415 if (!XFS_IS_QUOTA_ON(mp))
2418 lockflags = XFS_ILOCK_EXCL;
2419 xfs_ilock(ip, lockflags);
2421 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
2422 gid = ip->i_d.di_gid;
2425 * Attach the dquot(s) to this inode, doing a dquot allocation
2426 * if necessary. The dquot(s) will not be locked.
2428 if (XFS_NOT_DQATTACHED(mp, ip)) {
2429 if ((error = xfs_qm_dqattach(ip, XFS_QMOPT_DQALLOC |
2430 XFS_QMOPT_ILOCKED))) {
2431 xfs_iunlock(ip, lockflags);
2437 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
2438 if (ip->i_d.di_uid != uid) {
2440 * What we need is the dquot that has this uid, and
2441 * if we send the inode to dqget, the uid of the inode
2442 * takes priority over what's sent in the uid argument.
2443 * We must unlock inode here before calling dqget if
2444 * we're not sending the inode, because otherwise
2445 * we'll deadlock by doing trans_reserve while
2448 xfs_iunlock(ip, lockflags);
2449 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
2454 ASSERT(error != ENOENT);
2458 * Get the ilock in the right order.
2461 lockflags = XFS_ILOCK_SHARED;
2462 xfs_ilock(ip, lockflags);
2465 * Take an extra reference, because we'll return
2468 ASSERT(ip->i_udquot);
2475 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
2476 if (ip->i_d.di_gid != gid) {
2477 xfs_iunlock(ip, lockflags);
2478 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
2485 ASSERT(error != ENOENT);
2489 lockflags = XFS_ILOCK_SHARED;
2490 xfs_ilock(ip, lockflags);
2492 ASSERT(ip->i_gdquot);
2498 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
2499 if (ip->i_d.di_projid != prid) {
2500 xfs_iunlock(ip, lockflags);
2501 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
2508 ASSERT(error != ENOENT);
2512 lockflags = XFS_ILOCK_SHARED;
2513 xfs_ilock(ip, lockflags);
2515 ASSERT(ip->i_gdquot);
2523 xfs_dqtrace_entry_ino(uq, "DQALLOC", ip);
2525 xfs_iunlock(ip, lockflags);
2538 * Actually transfer ownership, and do dquot modifications.
2539 * These were already reserved.
2545 xfs_dquot_t **IO_olddq,
2548 xfs_dquot_t *prevdq;
2549 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
2550 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
2552 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2553 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
2558 ASSERT(prevdq != newdq);
2560 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
2561 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
2563 /* the sparkling new dquot */
2564 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
2565 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
2568 * Take an extra reference, because the inode
2569 * is going to keep this dquot pointer even
2570 * after the trans_commit.
2574 xfs_dqunlock(newdq);
2581 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
2584 xfs_qm_vop_chown_reserve(
2593 uint delblks, blkflags, prjflags = 0;
2594 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
2596 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
2598 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2600 delblks = ip->i_delayed_blks;
2601 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
2602 blkflags = XFS_IS_REALTIME_INODE(ip) ?
2603 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
2605 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
2606 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
2609 * If there are delayed allocation blocks, then we have to
2610 * unreserve those from the old dquot, and add them to the
2614 ASSERT(ip->i_udquot);
2615 unresudq = ip->i_udquot;
2618 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
2619 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
2620 ip->i_d.di_projid != be32_to_cpu(gdqp->q_core.d_id))
2621 prjflags = XFS_QMOPT_ENOSPC;
2624 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
2625 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
2628 ASSERT(ip->i_gdquot);
2629 unresgdq = ip->i_gdquot;
2634 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2635 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
2636 flags | blkflags | prjflags)))
2640 * Do the delayed blks reservations/unreservations now. Since, these
2641 * are done without the help of a transaction, if a reservation fails
2642 * its previous reservations won't be automatically undone by trans
2643 * code. So, we have to do it manually here.
2647 * Do the reservations first. Unreservation can't fail.
2649 ASSERT(delblksudq || delblksgdq);
2650 ASSERT(unresudq || unresgdq);
2651 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2652 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
2653 flags | blkflags | prjflags)))
2655 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2656 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
2664 xfs_qm_vop_rename_dqattach(
2665 xfs_inode_t **i_tab)
2673 if (! XFS_IS_QUOTA_ON(ip->i_mount))
2676 if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) {
2677 error = xfs_qm_dqattach(ip, 0);
2681 for (i = 1; (i < 4 && i_tab[i]); i++) {
2683 * Watch out for duplicate entries in the table.
2685 if ((ip = i_tab[i]) != i_tab[i-1]) {
2686 if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) {
2687 error = xfs_qm_dqattach(ip, 0);
2697 xfs_qm_vop_dqattach_and_dqmod_newinode(
2703 if (!XFS_IS_QUOTA_ON(tp->t_mountp))
2706 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
2707 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
2713 ASSERT(ip->i_udquot == NULL);
2714 ip->i_udquot = udqp;
2715 ASSERT(XFS_IS_UQUOTA_ON(tp->t_mountp));
2716 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
2717 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2723 ASSERT(ip->i_gdquot == NULL);
2724 ip->i_gdquot = gdqp;
2725 ASSERT(XFS_IS_OQUOTA_ON(tp->t_mountp));
2726 ASSERT((XFS_IS_GQUOTA_ON(tp->t_mountp) ?
2727 ip->i_d.di_gid : ip->i_d.di_projid) ==
2728 be32_to_cpu(gdqp->q_core.d_id));
2729 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2733 /* ------------- list stuff -----------------*/
2735 xfs_qm_freelist_init(xfs_frlist_t *ql)
2737 ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql;
2738 mutex_init(&ql->qh_lock);
2744 xfs_qm_freelist_destroy(xfs_frlist_t *ql)
2746 xfs_dquot_t *dqp, *nextdqp;
2748 mutex_lock(&ql->qh_lock);
2749 for (dqp = ql->qh_next;
2750 dqp != (xfs_dquot_t *)ql; ) {
2752 nextdqp = dqp->dq_flnext;
2754 cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp);
2756 XQM_FREELIST_REMOVE(dqp);
2758 xfs_qm_dqdestroy(dqp);
2761 mutex_unlock(&ql->qh_lock);
2762 mutex_destroy(&ql->qh_lock);
2764 ASSERT(ql->qh_nelems == 0);
2768 xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq)
2770 dq->dq_flnext = ql->qh_next;
2771 dq->dq_flprev = (xfs_dquot_t *)ql;
2773 dq->dq_flnext->dq_flprev = dq;
2774 xfs_Gqm->qm_dqfreelist.qh_nelems++;
2775 xfs_Gqm->qm_dqfreelist.qh_version++;
2779 xfs_qm_freelist_unlink(xfs_dquot_t *dq)
2781 xfs_dquot_t *next = dq->dq_flnext;
2782 xfs_dquot_t *prev = dq->dq_flprev;
2784 next->dq_flprev = prev;
2785 prev->dq_flnext = next;
2786 dq->dq_flnext = dq->dq_flprev = dq;
2787 xfs_Gqm->qm_dqfreelist.qh_nelems--;
2788 xfs_Gqm->qm_dqfreelist.qh_version++;
2792 xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq)
2794 xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq);
2798 xfs_qm_dqhashlock_nowait(
2803 locked = mutex_trylock(&((dqp)->q_hash->qh_lock));
2808 xfs_qm_freelist_lock_nowait(
2813 locked = mutex_trylock(&(xqm->qm_dqfreelist.qh_lock));
2818 xfs_qm_mplist_nowait(
2823 ASSERT(mp->m_quotainfo);
2824 locked = mutex_trylock(&(XFS_QI_MPLLOCK(mp)));