2 * Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
38 #include "xfs_trans.h"
43 #include "xfs_alloc.h"
44 #include "xfs_dmapi.h"
45 #include "xfs_quota.h"
46 #include "xfs_mount.h"
47 #include "xfs_alloc_btree.h"
48 #include "xfs_bmap_btree.h"
49 #include "xfs_ialloc_btree.h"
50 #include "xfs_btree.h"
51 #include "xfs_ialloc.h"
52 #include "xfs_attr_sf.h"
53 #include "xfs_dir_sf.h"
54 #include "xfs_dir2_sf.h"
55 #include "xfs_dinode.h"
56 #include "xfs_inode.h"
59 #include "xfs_rtalloc.h"
60 #include "xfs_error.h"
61 #include "xfs_itable.h"
67 #include "xfs_buf_item.h"
68 #include "xfs_trans_space.h"
69 #include "xfs_utils.h"
74 * The global quota manager. There is only one of these for the entire
75 * system, _not_ one per file system. XQM keeps track of the overall
76 * quota functionality, including maintaining the freelist and hash
80 struct xfs_qm *xfs_Gqm;
82 kmem_zone_t *qm_dqzone;
83 kmem_zone_t *qm_dqtrxzone;
84 kmem_shaker_t xfs_qm_shaker;
86 STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int);
87 STATIC void xfs_qm_list_destroy(xfs_dqlist_t *);
88 STATIC int xfs_qm_quotacheck(xfs_mount_t *);
90 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
91 STATIC int xfs_qm_shake(int, unsigned int);
94 extern mutex_t qcheck_lock;
98 #define XQM_LIST_PRINT(l, NXT, title) \
100 xfs_dquot_t *dqp; int i = 0; \
101 cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
102 for (dqp = (l)->qh_next; dqp != NULL; dqp = dqp->NXT) { \
103 cmn_err(CE_DEBUG, " %d. \"%d (%s)\" " \
104 "bcnt = %d, icnt = %d, refs = %d", \
105 ++i, (int) INT_GET(dqp->q_core.d_id, ARCH_CONVERT), \
106 DQFLAGTO_TYPESTR(dqp), \
107 (int) INT_GET(dqp->q_core.d_bcount, ARCH_CONVERT), \
108 (int) INT_GET(dqp->q_core.d_icount, ARCH_CONVERT), \
109 (int) dqp->q_nrefs); } \
112 #define XQM_LIST_PRINT(l, NXT, title) do { } while (0)
116 * Initialize the XQM structure.
117 * Note that there is not one quota manager per file system.
119 STATIC struct xfs_qm *
125 xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
129 * Initialize the dquot hash tables.
131 hsize = (DQUOT_HASH_HEURISTIC < XFS_QM_NCSIZE_THRESHOLD) ?
132 XFS_QM_HASHSIZE_LOW : XFS_QM_HASHSIZE_HIGH;
133 xqm->qm_dqhashmask = hsize - 1;
135 xqm->qm_usr_dqhtable = (xfs_dqhash_t *)kmem_zalloc(hsize *
136 sizeof(xfs_dqhash_t),
138 xqm->qm_grp_dqhtable = (xfs_dqhash_t *)kmem_zalloc(hsize *
139 sizeof(xfs_dqhash_t),
141 ASSERT(xqm->qm_usr_dqhtable != NULL);
142 ASSERT(xqm->qm_grp_dqhtable != NULL);
144 for (i = 0; i < hsize; i++) {
145 xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i);
146 xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i);
150 * Freelist of all dquots of all file systems
152 xfs_qm_freelist_init(&(xqm->qm_dqfreelist));
155 * dquot zone. we register our own low-memory callback.
158 xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t),
160 qm_dqzone = xqm->qm_dqzone;
162 xqm->qm_dqzone = qm_dqzone;
164 xfs_qm_shaker = kmem_shake_register(xfs_qm_shake);
167 * The t_dqinfo portion of transactions.
170 xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t),
172 qm_dqtrxzone = xqm->qm_dqtrxzone;
174 xqm->qm_dqtrxzone = qm_dqtrxzone;
176 atomic_set(&xqm->qm_totaldquots, 0);
177 xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO;
180 mutex_init(&qcheck_lock, MUTEX_DEFAULT, "qchk");
186 * Destroy the global quota manager when its reference count goes to zero.
195 ASSERT(xqm->qm_nrefs == 0);
196 kmem_shake_deregister(xfs_qm_shaker);
197 hsize = xqm->qm_dqhashmask + 1;
198 for (i = 0; i < hsize; i++) {
199 xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
200 xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
202 kmem_free(xqm->qm_usr_dqhtable, hsize * sizeof(xfs_dqhash_t));
203 kmem_free(xqm->qm_grp_dqhtable, hsize * sizeof(xfs_dqhash_t));
204 xqm->qm_usr_dqhtable = NULL;
205 xqm->qm_grp_dqhtable = NULL;
206 xqm->qm_dqhashmask = 0;
207 xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist));
209 mutex_destroy(&qcheck_lock);
211 kmem_free(xqm, sizeof(xfs_qm_t));
215 * Called at mount time to let XQM know that another file system is
216 * starting quotas. This isn't crucial information as the individual mount
217 * structures are pretty independent, but it helps the XQM keep a
218 * global view of what's going on.
222 xfs_qm_hold_quotafs_ref(
223 struct xfs_mount *mp)
226 * Need to lock the xfs_Gqm structure for things like this. For example,
227 * the structure could disappear between the entry to this routine and
228 * a HOLD operation if not locked.
230 XFS_QM_LOCK(xfs_Gqm);
232 if (xfs_Gqm == NULL) {
233 if ((xfs_Gqm = xfs_Gqm_init()) == NULL) {
234 return (XFS_ERROR(EINVAL));
238 * We can keep a list of all filesystems with quotas mounted for
239 * debugging and statistical purposes, but ...
240 * Just take a reference and get out.
242 XFS_QM_HOLD(xfs_Gqm);
243 XFS_QM_UNLOCK(xfs_Gqm);
250 * Release the reference that a filesystem took at mount time,
251 * so that we know when we need to destroy the entire quota manager.
255 xfs_qm_rele_quotafs_ref(
256 struct xfs_mount *mp)
258 xfs_dquot_t *dqp, *nextdqp;
261 ASSERT(xfs_Gqm->qm_nrefs > 0);
264 * Go thru the freelist and destroy all inactive dquots.
266 xfs_qm_freelist_lock(xfs_Gqm);
268 for (dqp = xfs_Gqm->qm_dqfreelist.qh_next;
269 dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) {
271 nextdqp = dqp->dq_flnext;
272 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
273 ASSERT(dqp->q_mount == NULL);
274 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
275 ASSERT(dqp->HL_PREVP == NULL);
276 ASSERT(dqp->MPL_PREVP == NULL);
277 XQM_FREELIST_REMOVE(dqp);
279 xfs_qm_dqdestroy(dqp);
285 xfs_qm_freelist_unlock(xfs_Gqm);
288 * Destroy the entire XQM. If somebody mounts with quotaon, this'll
291 XFS_QM_LOCK(xfs_Gqm);
292 XFS_QM_RELE(xfs_Gqm);
293 if (xfs_Gqm->qm_nrefs == 0) {
294 xfs_qm_destroy(xfs_Gqm);
297 XFS_QM_UNLOCK(xfs_Gqm);
301 * This is called at mount time from xfs_mountfs to initialize the quotainfo
302 * structure and start the global quotamanager (xfs_Gqm) if it hasn't done
303 * so already. Note that the superblock has not been read in yet.
306 xfs_qm_mount_quotainit(
311 * User or group quotas has to be on.
313 ASSERT(flags & (XFSMNT_UQUOTA | XFSMNT_GQUOTA));
316 * Initialize the flags in the mount structure. From this point
317 * onwards we look at m_qflags to figure out if quotas's ON/OFF, etc.
318 * Note that we enforce nothing if accounting is off.
319 * ie. XFSMNT_*QUOTA must be ON for XFSMNT_*QUOTAENF.
320 * It isn't necessary to take the quotaoff lock to do this; this is
323 if (flags & XFSMNT_UQUOTA) {
324 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
325 if (flags & XFSMNT_UQUOTAENF)
326 mp->m_qflags |= XFS_UQUOTA_ENFD;
328 if (flags & XFSMNT_GQUOTA) {
329 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
330 if (flags & XFSMNT_GQUOTAENF)
331 mp->m_qflags |= XFS_GQUOTA_ENFD;
336 * Just destroy the quotainfo structure.
339 xfs_qm_unmount_quotadestroy(
343 xfs_qm_destroy_quotainfo(mp);
348 * This is called from xfs_mountfs to start quotas and initialize all
349 * necessary data structures like quotainfo. This is also responsible for
350 * running a quotacheck as necessary. We are guaranteed that the superblock
351 * is consistently read in at this point.
362 * If a file system had quotas running earlier, but decided to
363 * mount without -o quota/uquota/gquota options, revoke the
364 * quotachecked license, and bail out.
366 if (! XFS_IS_QUOTA_ON(mp) &&
367 (mp->m_sb.sb_qflags & (XFS_UQUOTA_ACCT|XFS_GQUOTA_ACCT))) {
373 * If quotas on realtime volumes is not supported, we disable
374 * quotas immediately.
376 if (mp->m_sb.sb_rextents) {
378 "Cannot turn on quotas for realtime filesystem %s",
384 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
385 cmn_err(CE_NOTE, "Attempting to turn on disk quotas.");
388 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
390 * Allocate the quotainfo structure inside the mount struct, and
391 * create quotainode(s), and change/rev superblock if necessary.
393 if ((error = xfs_qm_init_quotainfo(mp))) {
395 * We must turn off quotas.
397 ASSERT(mp->m_quotainfo == NULL);
402 * If any of the quotas are not consistent, do a quotacheck.
404 if (XFS_QM_NEED_QUOTACHECK(mp)) {
406 cmn_err(CE_NOTE, "Doing a quotacheck. Please wait.");
408 if ((error = xfs_qm_quotacheck(mp))) {
409 cmn_err(CE_WARN, "Quotacheck unsuccessful (Error %d): "
413 * We must turn off quotas.
415 ASSERT(mp->m_quotainfo != NULL);
416 ASSERT(xfs_Gqm != NULL);
417 xfs_qm_destroy_quotainfo(mp);
422 cmn_err(CE_NOTE, "Done quotacheck.");
427 * We actually don't have to acquire the SB_LOCK at all.
428 * This can only be called from mount, and that's single threaded. XXX
431 sbf = mp->m_sb.sb_qflags;
432 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
433 XFS_SB_UNLOCK(mp, s);
435 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
436 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
438 * We could only have been turning quotas off.
439 * We aren't in very good shape actually because
440 * the incore structures are convinced that quotas are
441 * off, but the on disk superblock doesn't know that !
443 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
444 xfs_fs_cmn_err(CE_ALERT, mp,
445 "XFS mount_quotas: Superblock update failed!");
450 xfs_fs_cmn_err(CE_WARN, mp,
451 "Failed to initialize disk quotas.");
453 return XFS_ERROR(error);
457 * Called from the vfsops layer.
460 xfs_qm_unmount_quotas(
463 xfs_inode_t *uqp, *gqp;
467 * Release the dquots that root inode, et al might be holding,
468 * before we flush quotas and blow away the quotainfo structure.
470 ASSERT(mp->m_rootip);
471 xfs_qm_dqdetach(mp->m_rootip);
473 xfs_qm_dqdetach(mp->m_rbmip);
475 xfs_qm_dqdetach(mp->m_rsumip);
478 * Flush out the quota inodes.
481 if (mp->m_quotainfo) {
482 if ((uqp = mp->m_quotainfo->qi_uquotaip) != NULL) {
483 xfs_ilock(uqp, XFS_ILOCK_EXCL);
485 error = xfs_iflush(uqp, XFS_IFLUSH_SYNC);
486 xfs_iunlock(uqp, XFS_ILOCK_EXCL);
487 if (unlikely(error == EFSCORRUPTED)) {
488 XFS_ERROR_REPORT("xfs_qm_unmount_quotas(1)",
489 XFS_ERRLEVEL_LOW, mp);
493 if ((gqp = mp->m_quotainfo->qi_gquotaip) != NULL) {
494 xfs_ilock(gqp, XFS_ILOCK_EXCL);
496 error = xfs_iflush(gqp, XFS_IFLUSH_SYNC);
497 xfs_iunlock(gqp, XFS_ILOCK_EXCL);
498 if (unlikely(error == EFSCORRUPTED)) {
499 XFS_ERROR_REPORT("xfs_qm_unmount_quotas(2)",
500 XFS_ERRLEVEL_LOW, mp);
506 XFS_PURGE_INODE(uqp);
507 mp->m_quotainfo->qi_uquotaip = NULL;
510 XFS_PURGE_INODE(gqp);
511 mp->m_quotainfo->qi_gquotaip = NULL;
514 return XFS_ERROR(error);
518 * Flush all dquots of the given file system to disk. The dquots are
519 * _not_ purged from memory here, just their data written to disk.
531 if (mp->m_quotainfo == NULL)
535 xfs_qm_mplist_lock(mp);
536 FOREACH_DQUOT_IN_MP(dqp, mp) {
538 if (! XFS_DQ_IS_DIRTY(dqp)) {
542 xfs_dqtrace_entry(dqp, "FLUSHALL: DQDIRTY");
543 /* XXX a sentinel would be better */
544 recl = XFS_QI_MPLRECLAIMS(mp);
545 if (! xfs_qm_dqflock_nowait(dqp)) {
547 * If we can't grab the flush lock then check
548 * to see if the dquot has been flushed delayed
549 * write. If so, grab its buffer and send it
550 * out immediately. We'll be able to acquire
551 * the flush lock when the I/O completes.
553 xfs_qm_dqflock_pushbuf_wait(dqp);
556 * Let go of the mplist lock. We don't want to hold it
557 * across a disk write.
559 xfs_qm_mplist_unlock(mp);
560 error = xfs_qm_dqflush(dqp, flags);
565 xfs_qm_mplist_lock(mp);
566 if (recl != XFS_QI_MPLRECLAIMS(mp)) {
567 xfs_qm_mplist_unlock(mp);
568 /* XXX restart limit */
573 xfs_qm_mplist_unlock(mp);
578 * Release the group dquot pointers the user dquots may be
579 * carrying around as a hint. mplist is locked on entry and exit.
582 xfs_qm_detach_gdquots(
585 xfs_dquot_t *dqp, *gdqp;
589 ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
590 dqp = XFS_QI_MPLNEXT(mp);
593 if ((gdqp = dqp->q_gdquot)) {
595 dqp->q_gdquot = NULL;
601 * Can't hold the mplist lock across a dqput.
602 * XXXmust convert to marker based iterations here.
604 nrecl = XFS_QI_MPLRECLAIMS(mp);
605 xfs_qm_mplist_unlock(mp);
608 xfs_qm_mplist_lock(mp);
609 if (nrecl != XFS_QI_MPLRECLAIMS(mp))
617 * Go through all the incore dquots of this file system and take them
618 * off the mplist and hashlist, if the dquot type matches the dqtype
619 * parameter. This is used when turning off quota accounting for
620 * users and/or groups, as well as when the filesystem is unmounting.
625 uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/GQUOTA */
630 xfs_dquot_t *nextdqp;
633 if (mp->m_quotainfo == NULL)
636 dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
637 dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
639 xfs_qm_mplist_lock(mp);
642 * In the first pass through all incore dquots of this filesystem,
643 * we release the group dquot pointers the user dquots may be
644 * carrying around as a hint. We need to do this irrespective of
645 * what's being turned off.
647 xfs_qm_detach_gdquots(mp);
651 ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
653 * Try to get rid of all of the unwanted dquots. The idea is to
654 * get them off mplist and hashlist, but leave them on freelist.
656 dqp = XFS_QI_MPLNEXT(mp);
659 * It's OK to look at the type without taking dqlock here.
660 * We're holding the mplist lock here, and that's needed for
663 if ((dqp->dq_flags & dqtype) == 0) {
668 if (! xfs_qm_dqhashlock_nowait(dqp)) {
669 nrecl = XFS_QI_MPLRECLAIMS(mp);
670 xfs_qm_mplist_unlock(mp);
671 XFS_DQ_HASH_LOCK(dqp->q_hash);
672 xfs_qm_mplist_lock(mp);
675 * XXXTheoretically, we can get into a very long
676 * ping pong game here.
677 * No one can be adding dquots to the mplist at
678 * this point, but somebody might be taking things off.
680 if (nrecl != XFS_QI_MPLRECLAIMS(mp)) {
681 XFS_DQ_HASH_UNLOCK(dqp->q_hash);
687 * Take the dquot off the mplist and hashlist. It may remain on
688 * freelist in INACTIVE state.
690 nextdqp = dqp->MPL_NEXT;
691 nmisses += xfs_qm_dqpurge(dqp, flags);
694 xfs_qm_mplist_unlock(mp);
706 * Purge the dquot cache.
707 * None of the dquots should really be busy at this point.
709 if (mp->m_quotainfo) {
710 while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
724 xfs_dquot_t *udqhint, /* hint */
725 xfs_dquot_t **IO_idqpp)
730 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
733 * See if we already have it in the inode itself. IO_idqpp is
734 * &i_udquot or &i_gdquot. This made the code look weird, but
735 * made the logic a lot simpler.
737 if ((dqp = *IO_idqpp)) {
740 xfs_dqtrace_entry(dqp, "DQATTACH: found in ip");
745 * udqhint is the i_udquot field in inode, and is non-NULL only
746 * when the type arg is XFS_DQ_GROUP. Its purpose is to save a
747 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
750 ASSERT(!udqhint || type == XFS_DQ_GROUP);
751 if (udqhint && !dolock)
755 * No need to take dqlock to look at the id.
756 * The ID can't change until it gets reclaimed, and it won't
757 * be reclaimed as long as we have a ref from inode and we hold
761 (dqp = udqhint->q_gdquot) &&
762 (INT_GET(dqp->q_core.d_id, ARCH_CONVERT) == id)) {
763 ASSERT(XFS_DQ_IS_LOCKED(udqhint));
766 ASSERT(*IO_idqpp == NULL);
770 xfs_dqunlock(udqhint);
775 * We can't hold a dquot lock when we call the dqget code.
776 * We'll deadlock in no time, because of (not conforming to)
777 * lock ordering - the inodelock comes before any dquot lock,
778 * and we may drop and reacquire the ilock in xfs_qm_dqget().
781 xfs_dqunlock(udqhint);
783 * Find the dquot from somewhere. This bumps the
784 * reference count of dquot and returns it locked.
785 * This can return ENOENT if dquot didn't exist on
786 * disk and we didn't ask it to allocate;
787 * ESRCH if quotas got turned off suddenly.
789 if ((error = xfs_qm_dqget(ip->i_mount, ip, id, type,
790 doalloc|XFS_QMOPT_DOWARN, &dqp))) {
791 if (udqhint && dolock)
796 xfs_dqtrace_entry(dqp, "DQATTACH: found by dqget");
798 * dqget may have dropped and re-acquired the ilock, but it guarantees
799 * that the dquot returned is the one that should go in the inode.
803 ASSERT(XFS_DQ_IS_LOCKED(dqp));
813 ASSERT(XFS_DQ_IS_LOCKED(dqp));
814 if (! xfs_qm_dqlock_nowait(udqhint)) {
823 ASSERT(XFS_DQ_IS_LOCKED(udqhint));
827 ASSERT(XFS_DQ_IS_LOCKED(dqp));
835 * Given a udquot and gdquot, attach a ptr to the group dquot in the
836 * udquot as a hint for future lookups. The idea sounds simple, but the
837 * execution isn't, because the udquot might have a group dquot attached
838 * already and getting rid of that gets us into lock ordering contraints.
839 * The process is complicated more by the fact that the dquots may or may not
840 * be locked on entry.
843 xfs_qm_dqattach_grouphint(
852 ASSERT(XFS_DQ_IS_LOCKED(udq));
853 ASSERT(XFS_DQ_IS_LOCKED(gdq));
859 if ((tmp = udq->q_gdquot)) {
866 udq->q_gdquot = NULL;
868 * We can't keep any dqlocks when calling dqrele,
869 * because the freelist lock comes before dqlocks.
875 * we took a hard reference once upon a time in dqget,
876 * so give it back when the udquot no longer points at it
877 * dqput() does the unlocking of the dquot.
885 ASSERT(XFS_DQ_IS_LOCKED(udq));
891 ASSERT(XFS_DQ_IS_LOCKED(udq));
892 ASSERT(XFS_DQ_IS_LOCKED(gdq));
894 * Somebody could have attached a gdquot here,
895 * when we dropped the uqlock. If so, just do nothing.
897 if (udq->q_gdquot == NULL) {
909 * Given a locked inode, attach dquot(s) to it, taking UQUOTAON / GQUOTAON
911 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
912 * If XFS_QMOPT_DQLOCK, the dquot(s) will be returned locked. This option pretty
913 * much made this code a complete mess, but it has been pretty useful.
914 * If XFS_QMOPT_ILOCKED, then inode sent is already locked EXCL.
915 * Inode may get unlocked and relocked in here, and the caller must deal with
923 xfs_mount_t *mp = ip->i_mount;
927 if ((! XFS_IS_QUOTA_ON(mp)) ||
928 (! XFS_NOT_DQATTACHED(mp, ip)) ||
929 (ip->i_ino == mp->m_sb.sb_uquotino) ||
930 (ip->i_ino == mp->m_sb.sb_gquotino))
933 ASSERT((flags & XFS_QMOPT_ILOCKED) == 0 ||
934 XFS_ISLOCKED_INODE_EXCL(ip));
936 if (! (flags & XFS_QMOPT_ILOCKED))
937 xfs_ilock(ip, XFS_ILOCK_EXCL);
939 if (XFS_IS_UQUOTA_ON(mp)) {
940 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
941 flags & XFS_QMOPT_DQALLOC,
942 flags & XFS_QMOPT_DQLOCK,
943 NULL, &ip->i_udquot);
948 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
949 if (XFS_IS_GQUOTA_ON(mp)) {
950 error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
951 flags & XFS_QMOPT_DQALLOC,
952 flags & XFS_QMOPT_DQLOCK,
953 ip->i_udquot, &ip->i_gdquot);
955 * Don't worry about the udquot that we may have
956 * attached above. It'll get detached, if not already.
964 * Attach this group quota to the user quota as a hint.
965 * This WON'T, in general, result in a thrash.
968 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
969 ASSERT(ip->i_udquot);
970 ASSERT(ip->i_gdquot);
973 * We may or may not have the i_udquot locked at this point,
974 * but this check is OK since we don't depend on the i_gdquot to
975 * be accurate 100% all the time. It is just a hint, and this
976 * will succeed in general.
978 if (ip->i_udquot->q_gdquot == ip->i_gdquot)
981 * Attach i_gdquot to the gdquot hint inside the i_udquot.
983 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot,
984 flags & XFS_QMOPT_DQLOCK);
992 if (flags & XFS_QMOPT_DQLOCK)
993 ASSERT(XFS_DQ_IS_LOCKED(ip->i_udquot));
996 if (flags & XFS_QMOPT_DQLOCK)
997 ASSERT(XFS_DQ_IS_LOCKED(ip->i_gdquot));
999 if (XFS_IS_UQUOTA_ON(mp))
1000 ASSERT(ip->i_udquot);
1001 if (XFS_IS_GQUOTA_ON(mp))
1002 ASSERT(ip->i_gdquot);
1006 if (! (flags & XFS_QMOPT_ILOCKED))
1007 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1011 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
1017 * Release dquots (and their references) if any.
1018 * The inode should be locked EXCL except when this's called by
1025 if (!(ip->i_udquot || ip->i_gdquot))
1028 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
1029 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
1031 xfs_dqtrace_entry_ino(ip->i_udquot, "DQDETTACH", ip);
1033 xfs_qm_dqrele(ip->i_udquot);
1034 ip->i_udquot = NULL;
1037 xfs_qm_dqrele(ip->i_gdquot);
1038 ip->i_gdquot = NULL;
1043 * This is called by VFS_SYNC and flags arg determines the caller,
1044 * and its motives, as done in xfs_sync.
1046 * vfs_sync: SYNC_FSDATA|SYNC_ATTR|SYNC_BDFLUSH 0x31
1047 * syscall sync: SYNC_FSDATA|SYNC_ATTR|SYNC_DELWRI 0x25
1048 * umountroot : SYNC_WAIT | SYNC_CLOSE | SYNC_ATTR | SYNC_FSDATA
1064 * We won't block unless we are asked to.
1066 nowait = (boolean_t)(flags & SYNC_BDFLUSH || (flags & SYNC_WAIT) == 0);
1069 xfs_qm_mplist_lock(mp);
1071 * dqpurge_all() also takes the mplist lock and iterate thru all dquots
1072 * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared
1073 * when we have the mplist lock, we know that dquots will be consistent
1074 * as long as we have it locked.
1076 if (! XFS_IS_QUOTA_ON(mp)) {
1077 xfs_qm_mplist_unlock(mp);
1080 FOREACH_DQUOT_IN_MP(dqp, mp) {
1082 * If this is vfs_sync calling, then skip the dquots that
1083 * don't 'seem' to be dirty. ie. don't acquire dqlock.
1084 * This is very similar to what xfs_sync does with inodes.
1086 if (flags & SYNC_BDFLUSH) {
1087 if (! XFS_DQ_IS_DIRTY(dqp))
1093 * Try to acquire the dquot lock. We are NOT out of
1094 * lock order, but we just don't want to wait for this
1095 * lock, unless somebody wanted us to.
1097 if (! xfs_qm_dqlock_nowait(dqp))
1104 * Now, find out for sure if this dquot is dirty or not.
1106 if (! XFS_DQ_IS_DIRTY(dqp)) {
1111 /* XXX a sentinel would be better */
1112 recl = XFS_QI_MPLRECLAIMS(mp);
1113 if (! xfs_qm_dqflock_nowait(dqp)) {
1119 * If we can't grab the flush lock then if the caller
1120 * really wanted us to give this our best shot,
1121 * see if we can give a push to the buffer before we wait
1122 * on the flush lock. At this point, we know that
1123 * eventhough the dquot is being flushed,
1124 * it has (new) dirty data.
1126 xfs_qm_dqflock_pushbuf_wait(dqp);
1129 * Let go of the mplist lock. We don't want to hold it
1130 * across a disk write
1132 flush_flags = (nowait) ? XFS_QMOPT_DELWRI : XFS_QMOPT_SYNC;
1133 xfs_qm_mplist_unlock(mp);
1134 xfs_dqtrace_entry(dqp, "XQM_SYNC: DQFLUSH");
1135 error = xfs_qm_dqflush(dqp, flush_flags);
1137 if (error && XFS_FORCED_SHUTDOWN(mp))
1138 return(0); /* Need to prevent umount failure */
1142 xfs_qm_mplist_lock(mp);
1143 if (recl != XFS_QI_MPLRECLAIMS(mp)) {
1144 if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS)
1147 xfs_qm_mplist_unlock(mp);
1152 xfs_qm_mplist_unlock(mp);
1158 * This initializes all the quota information that's kept in the
1162 xfs_qm_init_quotainfo(
1165 xfs_quotainfo_t *qinf;
1169 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1172 * Tell XQM that we exist as soon as possible.
1174 if ((error = xfs_qm_hold_quotafs_ref(mp))) {
1178 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
1181 * See if quotainodes are setup, and if not, allocate them,
1182 * and change the superblock accordingly.
1184 if ((error = xfs_qm_init_quotainos(mp))) {
1185 kmem_free(qinf, sizeof(xfs_quotainfo_t));
1186 mp->m_quotainfo = NULL;
1190 spinlock_init(&qinf->qi_pinlock, "xfs_qinf_pin");
1191 xfs_qm_list_init(&qinf->qi_dqlist, "mpdqlist", 0);
1192 qinf->qi_dqreclaims = 0;
1194 /* mutex used to serialize quotaoffs */
1195 mutex_init(&qinf->qi_quotaofflock, MUTEX_DEFAULT, "qoff");
1197 /* Precalc some constants */
1198 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1199 ASSERT(qinf->qi_dqchunklen);
1200 qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
1201 do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
1203 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
1206 * We try to get the limits from the superuser's limits fields.
1207 * This is quite hacky, but it is standard quota practice.
1208 * We look at the USR dquot with id == 0 first, but if user quotas
1209 * are not enabled we goto the GRP dquot with id == 0.
1210 * We don't really care to keep separate default limits for user
1211 * and group quotas, at least not at this point.
1213 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0,
1214 (XFS_IS_UQUOTA_RUNNING(mp)) ?
1215 XFS_DQ_USER : XFS_DQ_GROUP,
1216 XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN,
1220 * The warnings and timers set the grace period given to
1221 * a user or group before he or she can not perform any
1222 * more writing. If it is zero, a default is used.
1224 qinf->qi_btimelimit = INT_GET(dqp->q_core.d_btimer, ARCH_CONVERT) ?
1225 INT_GET(dqp->q_core.d_btimer, ARCH_CONVERT) : XFS_QM_BTIMELIMIT;
1226 qinf->qi_itimelimit = INT_GET(dqp->q_core.d_itimer, ARCH_CONVERT) ?
1227 INT_GET(dqp->q_core.d_itimer, ARCH_CONVERT) : XFS_QM_ITIMELIMIT;
1228 qinf->qi_rtbtimelimit = INT_GET(dqp->q_core.d_rtbtimer, ARCH_CONVERT) ?
1229 INT_GET(dqp->q_core.d_rtbtimer, ARCH_CONVERT) : XFS_QM_RTBTIMELIMIT;
1230 qinf->qi_bwarnlimit = INT_GET(dqp->q_core.d_bwarns, ARCH_CONVERT) ?
1231 INT_GET(dqp->q_core.d_bwarns, ARCH_CONVERT) : XFS_QM_BWARNLIMIT;
1232 qinf->qi_iwarnlimit = INT_GET(dqp->q_core.d_iwarns, ARCH_CONVERT) ?
1233 INT_GET(dqp->q_core.d_iwarns, ARCH_CONVERT) : XFS_QM_IWARNLIMIT;
1236 * We sent the XFS_QMOPT_DQSUSER flag to dqget because
1237 * we don't want this dquot cached. We haven't done a
1238 * quotacheck yet, and quotacheck doesn't like incore dquots.
1240 xfs_qm_dqdestroy(dqp);
1242 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
1243 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
1244 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
1245 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
1246 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
1254 * Gets called when unmounting a filesystem or when all quotas get
1256 * This purges the quota inodes, destroys locks and frees itself.
1259 xfs_qm_destroy_quotainfo(
1262 xfs_quotainfo_t *qi;
1264 qi = mp->m_quotainfo;
1266 ASSERT(xfs_Gqm != NULL);
1269 * Release the reference that XQM kept, so that we know
1270 * when the XQM structure should be freed. We cannot assume
1271 * that xfs_Gqm is non-null after this point.
1273 xfs_qm_rele_quotafs_ref(mp);
1275 spinlock_destroy(&qi->qi_pinlock);
1276 xfs_qm_list_destroy(&qi->qi_dqlist);
1278 if (qi->qi_uquotaip) {
1279 XFS_PURGE_INODE(qi->qi_uquotaip);
1280 qi->qi_uquotaip = NULL; /* paranoia */
1282 if (qi->qi_gquotaip) {
1283 XFS_PURGE_INODE(qi->qi_gquotaip);
1284 qi->qi_gquotaip = NULL;
1286 mutex_destroy(&qi->qi_quotaofflock);
1287 kmem_free(qi, sizeof(xfs_quotainfo_t));
1288 mp->m_quotainfo = NULL;
1293 /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
1302 mutex_init(&list->qh_lock, MUTEX_DEFAULT, str);
1303 list->qh_next = NULL;
1304 list->qh_version = 0;
1305 list->qh_nelems = 0;
1309 xfs_qm_list_destroy(
1312 mutex_destroy(&(list->qh_lock));
1317 * Stripped down version of dqattach. This doesn't attach, or even look at the
1318 * dquots attached to the inode. The rationale is that there won't be any
1319 * attached at the time this is called from quotacheck.
1322 xfs_qm_dqget_noattach(
1324 xfs_dquot_t **O_udqpp,
1325 xfs_dquot_t **O_gdqpp)
1329 xfs_dquot_t *udqp, *gdqp;
1331 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
1336 if (XFS_IS_UQUOTA_ON(mp)) {
1337 ASSERT(ip->i_udquot == NULL);
1339 * We want the dquot allocated if it doesn't exist.
1341 if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER,
1342 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN,
1345 * Shouldn't be able to turn off quotas here.
1347 ASSERT(error != ESRCH);
1348 ASSERT(error != ENOENT);
1354 if (XFS_IS_GQUOTA_ON(mp)) {
1355 ASSERT(ip->i_gdquot == NULL);
1358 if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_gid, XFS_DQ_GROUP,
1359 XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN,
1362 xfs_qm_dqrele(udqp);
1363 ASSERT(error != ESRCH);
1364 ASSERT(error != ENOENT);
1369 /* Reacquire the locks in the right order */
1371 if (! xfs_qm_dqlock_nowait(udqp)) {
1383 if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp));
1384 if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp));
1390 * Create an inode and return with a reference already taken, but unlocked
1391 * This is how we create quota inodes
1406 tp = xfs_trans_alloc(mp,XFS_TRANS_QM_QINOCREATE);
1407 if ((error = xfs_trans_reserve(tp,
1408 XFS_QM_QINOCREATE_SPACE_RES(mp),
1409 XFS_CREATE_LOG_RES(mp), 0,
1410 XFS_TRANS_PERM_LOG_RES,
1411 XFS_CREATE_LOG_COUNT))) {
1412 xfs_trans_cancel(tp, 0);
1415 memset(&zerocr, 0, sizeof(zerocr));
1417 if ((error = xfs_dir_ialloc(&tp, mp->m_rootip, S_IFREG, 1, 0,
1418 &zerocr, 0, 1, ip, &committed))) {
1419 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
1425 * Keep an extra reference to this quota inode. This inode is
1426 * locked exclusively and joined to the transaction already.
1428 ASSERT(XFS_ISLOCKED_INODE_EXCL(*ip));
1429 VN_HOLD(XFS_ITOV((*ip)));
1432 * Make the changes in the superblock, and log those too.
1433 * sbfields arg may contain fields other than *QUOTINO;
1434 * VERSIONNUM for example.
1436 s = XFS_SB_LOCK(mp);
1437 if (flags & XFS_QMOPT_SBVERSION) {
1438 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
1439 unsigned oldv = mp->m_sb.sb_versionnum;
1441 ASSERT(!XFS_SB_VERSION_HASQUOTA(&mp->m_sb));
1442 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1443 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
1444 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1445 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
1447 XFS_SB_VERSION_ADDQUOTA(&mp->m_sb);
1448 mp->m_sb.sb_uquotino = NULLFSINO;
1449 mp->m_sb.sb_gquotino = NULLFSINO;
1451 /* qflags will get updated _after_ quotacheck */
1452 mp->m_sb.sb_qflags = 0;
1453 #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY)
1455 "Old superblock version %x, converting to %x.",
1456 oldv, mp->m_sb.sb_versionnum);
1459 if (flags & XFS_QMOPT_UQUOTA)
1460 mp->m_sb.sb_uquotino = (*ip)->i_ino;
1462 mp->m_sb.sb_gquotino = (*ip)->i_ino;
1463 XFS_SB_UNLOCK(mp, s);
1464 xfs_mod_sb(tp, sbfields);
1466 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES,
1468 xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!");
1476 xfs_qm_reset_dqcounts(
1482 xfs_disk_dquot_t *ddq;
1485 xfs_buftrace("RESET DQUOTS", bp);
1487 * Reset all counters and timers. They'll be
1488 * started afresh by xfs_qm_quotacheck.
1491 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1492 do_div(j, sizeof(xfs_dqblk_t));
1493 ASSERT(XFS_QM_DQPERBLK(mp) == j);
1495 ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp);
1496 for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) {
1498 * Do a sanity check, and if needed, repair the dqblk. Don't
1499 * output any warnings because it's perfectly possible to
1500 * find unitialized dquot blks. See comment in xfs_qm_dqcheck.
1502 (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1504 INT_SET(ddq->d_bcount, ARCH_CONVERT, 0ULL);
1505 INT_SET(ddq->d_icount, ARCH_CONVERT, 0ULL);
1506 INT_SET(ddq->d_rtbcount, ARCH_CONVERT, 0ULL);
1507 INT_SET(ddq->d_btimer, ARCH_CONVERT, (time_t)0);
1508 INT_SET(ddq->d_itimer, ARCH_CONVERT, (time_t)0);
1509 INT_SET(ddq->d_bwarns, ARCH_CONVERT, 0UL);
1510 INT_SET(ddq->d_iwarns, ARCH_CONVERT, 0UL);
1511 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
1522 xfs_filblks_t blkcnt,
1532 incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ?
1533 XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt;
1537 * Blkcnt arg can be a very big number, and might even be
1538 * larger than the log itself. So, we have to break it up into
1539 * manageable-sized transactions.
1540 * Note that we don't start a permanent transaction here; we might
1541 * not be able to get a log reservation for the whole thing up front,
1542 * and we don't really care to either, because we just discard
1543 * everything if we were to crash in the middle of this loop.
1546 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1547 XFS_FSB_TO_DADDR(mp, bno),
1548 (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp);
1552 (void) xfs_qm_reset_dqcounts(mp, bp, firstid,
1553 flags & XFS_QMOPT_UQUOTA ?
1554 XFS_DQ_USER : XFS_DQ_GROUP);
1555 xfs_bdwrite(mp, bp);
1557 * goto the next block.
1560 firstid += XFS_QM_DQPERBLK(mp);
1566 * Iterate over all allocated USR/GRP dquots in the system, calling a
1567 * caller supplied function for every chunk of dquots that we find.
1575 xfs_bmbt_irec_t *map;
1576 int i, nmaps; /* number of map entries */
1577 int error; /* return value */
1578 xfs_fileoff_t lblkno;
1579 xfs_filblks_t maxlblkcnt;
1581 xfs_fsblock_t rablkno;
1582 xfs_filblks_t rablkcnt;
1586 * This looks racey, but we can't keep an inode lock across a
1587 * trans_reserve. But, this gets called during quotacheck, and that
1588 * happens only at mount time which is single threaded.
1590 if (qip->i_d.di_nblocks == 0)
1593 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1596 maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1598 nmaps = XFS_DQITER_MAP_SIZE;
1600 * We aren't changing the inode itself. Just changing
1601 * some of its data. No new blocks are added here, and
1602 * the inode is never added to the transaction.
1604 xfs_ilock(qip, XFS_ILOCK_SHARED);
1605 error = xfs_bmapi(NULL, qip, lblkno,
1606 maxlblkcnt - lblkno,
1609 0, map, &nmaps, NULL);
1610 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1614 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1615 for (i = 0; i < nmaps; i++) {
1616 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1617 ASSERT(map[i].br_blockcount);
1620 lblkno += map[i].br_blockcount;
1622 if (map[i].br_startblock == HOLESTARTBLOCK)
1625 firstid = (xfs_dqid_t) map[i].br_startoff *
1626 XFS_QM_DQPERBLK(mp);
1628 * Do a read-ahead on the next extent.
1630 if ((i+1 < nmaps) &&
1631 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1632 rablkcnt = map[i+1].br_blockcount;
1633 rablkno = map[i+1].br_startblock;
1634 while (rablkcnt--) {
1635 xfs_baread(mp->m_ddev_targp,
1636 XFS_FSB_TO_DADDR(mp, rablkno),
1637 (int)XFS_QI_DQCHUNKLEN(mp));
1642 * Iterate thru all the blks in the extent and
1643 * reset the counters of all the dquots inside them.
1645 if ((error = xfs_qm_dqiter_bufs(mp,
1647 map[i].br_startblock,
1648 map[i].br_blockcount,
1656 } while (nmaps > 0);
1658 kmem_free(map, XFS_DQITER_MAP_SIZE * sizeof(*map));
1664 * Called by dqusage_adjust in doing a quotacheck.
1665 * Given the inode, and a dquot (either USR or GRP, doesn't matter),
1666 * this updates its incore copy as well as the buffer copy. This is
1667 * so that once the quotacheck is done, we can just log all the buffers,
1668 * as opposed to logging numerous updates to individual dquots.
1671 xfs_qm_quotacheck_dqadjust(
1676 ASSERT(XFS_DQ_IS_LOCKED(dqp));
1677 xfs_dqtrace_entry(dqp, "QCHECK DQADJUST");
1679 * Adjust the inode count and the block count to reflect this inode's
1682 INT_MOD(dqp->q_core.d_icount, ARCH_CONVERT, +1);
1683 dqp->q_res_icount++;
1685 INT_MOD(dqp->q_core.d_bcount, ARCH_CONVERT, nblks);
1686 dqp->q_res_bcount += nblks;
1689 INT_MOD(dqp->q_core.d_rtbcount, ARCH_CONVERT, rtblks);
1690 dqp->q_res_rtbcount += rtblks;
1694 * Adjust the timers since we just changed usages
1696 if (! XFS_IS_SUSER_DQUOT(dqp))
1697 xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core);
1699 dqp->dq_flags |= XFS_DQ_DIRTY;
1705 xfs_qcnt_t *O_rtblks)
1707 xfs_filblks_t rtblks; /* total rt blks */
1708 xfs_ifork_t *ifp; /* inode fork pointer */
1709 xfs_extnum_t nextents; /* number of extent entries */
1710 xfs_bmbt_rec_t *base; /* base of extent array */
1711 xfs_bmbt_rec_t *ep; /* pointer to an extent entry */
1714 ASSERT(XFS_IS_REALTIME_INODE(ip));
1715 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1716 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1717 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1721 nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
1722 base = &ifp->if_u1.if_extents[0];
1723 for (ep = base; ep < &base[nextents]; ep++)
1724 rtblks += xfs_bmbt_get_blockcount(ep);
1725 *O_rtblks = (xfs_qcnt_t)rtblks;
1730 * callback routine supplied to bulkstat(). Given an inumber, find its
1731 * dquots and update them to account for resources taken by that inode.
1735 xfs_qm_dqusage_adjust(
1736 xfs_mount_t *mp, /* mount point for filesystem */
1737 xfs_ino_t ino, /* inode number to get data for */
1738 void *buffer, /* not used */
1739 int ubsize, /* not used */
1740 void *private_data, /* not used */
1741 xfs_daddr_t bno, /* starting block of inode cluster */
1742 int *ubused, /* not used */
1743 void *dip, /* on-disk inode pointer (not used) */
1744 int *res) /* result code value */
1747 xfs_dquot_t *udqp, *gdqp;
1748 xfs_qcnt_t nblks, rtblks;
1751 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1754 * rootino must have its resources accounted for, not so with the quota
1757 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1758 *res = BULKSTAT_RV_NOTHING;
1759 return XFS_ERROR(EINVAL);
1763 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1764 * interface expects the inode to be exclusively locked because that's
1765 * the case in all other instances. It's OK that we do this because
1766 * quotacheck is done only at mount time.
1768 if ((error = xfs_iget(mp, NULL, ino, XFS_ILOCK_EXCL, &ip, bno))) {
1769 *res = BULKSTAT_RV_NOTHING;
1773 if (ip->i_d.di_mode == 0) {
1774 xfs_iput_new(ip, XFS_ILOCK_EXCL);
1775 *res = BULKSTAT_RV_NOTHING;
1776 return XFS_ERROR(ENOENT);
1780 * Obtain the locked dquots. In case of an error (eg. allocation
1781 * fails for ENOSPC), we return the negative of the error number
1782 * to bulkstat, so that it can get propagated to quotacheck() and
1783 * making us disable quotas for the file system.
1785 if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) {
1786 xfs_iput(ip, XFS_ILOCK_EXCL);
1787 *res = BULKSTAT_RV_GIVEUP;
1792 if (! XFS_IS_REALTIME_INODE(ip)) {
1793 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks;
1796 * Walk thru the extent list and count the realtime blocks.
1798 if ((error = xfs_qm_get_rtblks(ip, &rtblks))) {
1799 xfs_iput(ip, XFS_ILOCK_EXCL);
1804 *res = BULKSTAT_RV_GIVEUP;
1807 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1809 ASSERT(ip->i_delayed_blks == 0);
1812 * We can't release the inode while holding its dquot locks.
1813 * The inode can go into inactive and might try to acquire the dquotlocks.
1814 * So, just unlock here and do a vn_rele at the end.
1816 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1819 * Add the (disk blocks and inode) resources occupied by this
1820 * inode to its dquots. We do this adjustment in the incore dquot,
1821 * and also copy the changes to its buffer.
1822 * We don't care about putting these changes in a transaction
1823 * envelope because if we crash in the middle of a 'quotacheck'
1824 * we have to start from the beginning anyway.
1825 * Once we're done, we'll log all the dquot bufs.
1827 * The *QUOTA_ON checks below may look pretty racey, but quotachecks
1828 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1830 if (XFS_IS_UQUOTA_ON(mp)) {
1832 xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks);
1835 if (XFS_IS_GQUOTA_ON(mp)) {
1837 xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks);
1841 * Now release the inode. This will send it to 'inactive', and
1842 * possibly even free blocks.
1844 VN_RELE(XFS_ITOV(ip));
1849 *res = BULKSTAT_RV_DIDONE;
1854 * Walk thru all the filesystem inodes and construct a consistent view
1855 * of the disk quota world.
1861 int done, count, error;
1864 xfs_inode_t *uip, *gip;
1872 ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp));
1873 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1876 * There should be no cached dquots. The (simplistic) quotacheck
1877 * algorithm doesn't like that.
1879 ASSERT(XFS_QI_MPLNDQUOTS(mp) == 0);
1881 cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname);
1884 * First we go thru all the dquots on disk, USR and GRP, and reset
1885 * their counters to zero. We need a clean slate.
1886 * We don't log our changes till later.
1888 if ((uip = XFS_QI_UQIP(mp))) {
1889 if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA)))
1891 flags |= XFS_UQUOTA_CHKD;
1894 if ((gip = XFS_QI_GQIP(mp))) {
1895 if ((error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA)))
1897 flags |= XFS_GQUOTA_CHKD;
1902 * Iterate thru all the inodes in the file system,
1903 * adjusting the corresponding dquot counters in core.
1905 if ((error = xfs_bulkstat(mp, &lastino, &count,
1906 xfs_qm_dqusage_adjust, NULL,
1908 BULKSTAT_FG_IGET|BULKSTAT_FG_VFSLOCKED,
1915 * We can get this error if we couldn't do a dquot allocation inside
1916 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1917 * dirty dquots that might be cached, we just want to get rid of them
1918 * and turn quotaoff. The dquots won't be attached to any of the inodes
1919 * at this point (because we intentionally didn't in dqget_noattach).
1922 xfs_qm_dqpurge_all(mp,
1923 XFS_QMOPT_UQUOTA|XFS_QMOPT_GQUOTA|
1924 XFS_QMOPT_QUOTAOFF);
1928 * We've made all the changes that we need to make incore.
1929 * Now flush_them down to disk buffers.
1931 xfs_qm_dqflush_all(mp, XFS_QMOPT_DELWRI);
1934 * We didn't log anything, because if we crashed, we'll have to
1935 * start the quotacheck from scratch anyway. However, we must make
1936 * sure that our dquot changes are secure before we put the
1937 * quotacheck'd stamp on the superblock. So, here we do a synchronous
1940 XFS_bflush(mp->m_ddev_targp);
1943 * If one type of quotas is off, then it will lose its
1944 * quotachecked status, since we won't be doing accounting for
1945 * that type anymore.
1947 mp->m_qflags &= ~(XFS_GQUOTA_CHKD | XFS_UQUOTA_CHKD);
1948 mp->m_qflags |= flags;
1950 XQM_LIST_PRINT(&(XFS_QI_MPL_LIST(mp)), MPL_NEXT, "++++ Mp list +++");
1953 cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname);
1958 * This is called after the superblock has been read in and we're ready to
1959 * iget the quota inodes.
1962 xfs_qm_init_quotainos(
1965 xfs_inode_t *uip, *gip;
1970 ASSERT(mp->m_quotainfo);
1976 * Get the uquota and gquota inodes
1978 if (XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
1979 if (XFS_IS_UQUOTA_ON(mp) &&
1980 mp->m_sb.sb_uquotino != NULLFSINO) {
1981 ASSERT(mp->m_sb.sb_uquotino > 0);
1982 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1984 return XFS_ERROR(error);
1986 if (XFS_IS_GQUOTA_ON(mp) &&
1987 mp->m_sb.sb_gquotino != NULLFSINO) {
1988 ASSERT(mp->m_sb.sb_gquotino > 0);
1989 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1992 VN_RELE(XFS_ITOV(uip));
1993 return XFS_ERROR(error);
1997 flags |= XFS_QMOPT_SBVERSION;
1998 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1999 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
2003 * Create the two inodes, if they don't exist already. The changes
2004 * made above will get added to a transaction and logged in one of
2005 * the qino_alloc calls below. If the device is readonly,
2006 * temporarily switch to read-write to do this.
2008 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
2009 if ((error = xfs_qm_qino_alloc(mp, &uip,
2010 sbflags | XFS_SB_UQUOTINO,
2011 flags | XFS_QMOPT_UQUOTA)))
2012 return XFS_ERROR(error);
2014 flags &= ~XFS_QMOPT_SBVERSION;
2016 if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
2017 if ((error = xfs_qm_qino_alloc(mp, &gip,
2018 sbflags | XFS_SB_GQUOTINO,
2019 flags | XFS_QMOPT_GQUOTA))) {
2021 VN_RELE(XFS_ITOV(uip));
2023 return XFS_ERROR(error);
2027 XFS_QI_UQIP(mp) = uip;
2028 XFS_QI_GQIP(mp) = gip;
2035 * Traverse the freelist of dquots and attempt to reclaim a maximum of
2036 * 'howmany' dquots. This operation races with dqlookup(), and attempts to
2037 * favor the lookup function ...
2038 * XXXsup merge this with qm_reclaim_one().
2041 xfs_qm_shake_freelist(
2046 xfs_dquot_t *dqp, *nextdqp;
2058 cmn_err(CE_DEBUG, "Shake free 0x%x", howmany);
2060 /* lock order is : hashchainlock, freelistlock, mplistlock */
2062 xfs_qm_freelist_lock(xfs_Gqm);
2064 for (dqp = xfs_Gqm->qm_dqfreelist.qh_next;
2065 ((dqp != (xfs_dquot_t *) &xfs_Gqm->qm_dqfreelist) &&
2066 nreclaimed < howmany); ) {
2070 * We are racing with dqlookup here. Naturally we don't
2071 * want to reclaim a dquot that lookup wants.
2073 if (dqp->dq_flags & XFS_DQ_WANT) {
2075 xfs_qm_freelist_unlock(xfs_Gqm);
2076 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2077 return (nreclaimed);
2078 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
2083 * If the dquot is inactive, we are assured that it is
2084 * not on the mplist or the hashlist, and that makes our
2087 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
2088 ASSERT(dqp->q_mount == NULL);
2089 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
2090 ASSERT(dqp->HL_PREVP == NULL);
2091 ASSERT(dqp->MPL_PREVP == NULL);
2092 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
2093 nextdqp = dqp->dq_flnext;
2097 ASSERT(dqp->MPL_PREVP);
2099 * Try to grab the flush lock. If this dquot is in the process of
2100 * getting flushed to disk, we don't want to reclaim it.
2102 if (! xfs_qm_dqflock_nowait(dqp)) {
2104 dqp = dqp->dq_flnext;
2109 * We have the flush lock so we know that this is not in the
2110 * process of being flushed. So, if this is dirty, flush it
2111 * DELWRI so that we don't get a freelist infested with
2114 if (XFS_DQ_IS_DIRTY(dqp)) {
2115 xfs_dqtrace_entry(dqp, "DQSHAKE: DQDIRTY");
2117 * We flush it delayed write, so don't bother
2118 * releasing the mplock.
2120 (void) xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
2121 xfs_dqunlock(dqp); /* dqflush unlocks dqflock */
2122 dqp = dqp->dq_flnext;
2126 * We're trying to get the hashlock out of order. This races
2127 * with dqlookup; so, we giveup and goto the next dquot if
2128 * we couldn't get the hashlock. This way, we won't starve
2129 * a dqlookup process that holds the hashlock that is
2130 * waiting for the freelist lock.
2132 if (! xfs_qm_dqhashlock_nowait(dqp)) {
2135 dqp = dqp->dq_flnext;
2139 * This races with dquot allocation code as well as dqflush_all
2140 * and reclaim code. So, if we failed to grab the mplist lock,
2141 * giveup everything and start over.
2145 if (! xfs_qm_mplist_nowait(dqp->q_mount)) {
2146 /* XXX put a sentinel so that we can come back here */
2149 XFS_DQ_HASH_UNLOCK(hash);
2150 xfs_qm_freelist_unlock(xfs_Gqm);
2151 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2152 return (nreclaimed);
2155 xfs_dqtrace_entry(dqp, "DQSHAKE: UNLINKING");
2157 cmn_err(CE_DEBUG, "Shake 0x%p, ID 0x%x\n",
2158 dqp, INT_GET(dqp->q_core.d_id, ARCH_CONVERT));
2160 ASSERT(dqp->q_nrefs == 0);
2161 nextdqp = dqp->dq_flnext;
2162 XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp);
2163 XQM_HASHLIST_REMOVE(hash, dqp);
2165 xfs_qm_mplist_unlock(dqp->q_mount);
2166 XFS_DQ_HASH_UNLOCK(hash);
2169 XQM_FREELIST_REMOVE(dqp);
2172 XQM_STATS_INC(xqmstats.xs_qm_dqshake_reclaims);
2173 xfs_qm_dqdestroy(dqp);
2176 xfs_qm_freelist_unlock(xfs_Gqm);
2177 return (nreclaimed);
2182 * The kmem_shake interface is invoked when memory is running low.
2186 xfs_qm_shake(int nr_to_scan, unsigned int gfp_mask)
2188 int ndqused, nfree, n;
2190 if (!kmem_shake_allow(gfp_mask))
2195 nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */
2196 /* incore dquots in all f/s's */
2197 ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree;
2199 ASSERT(ndqused >= 0);
2201 if (nfree <= ndqused && nfree < ndquot)
2204 ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */
2205 n = nfree - ndqused - ndquot; /* # over target */
2207 return xfs_qm_shake_freelist(MAX(nfree, n));
2212 * Just pop the least recently used dquot off the freelist and
2213 * recycle it. The returned dquot is locked.
2215 STATIC xfs_dquot_t *
2216 xfs_qm_dqreclaim_one(void)
2218 xfs_dquot_t *dqpout;
2227 /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */
2229 xfs_qm_freelist_lock(xfs_Gqm);
2231 FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) {
2235 * We are racing with dqlookup here. Naturally we don't
2236 * want to reclaim a dquot that lookup wants. We release the
2237 * freelist lock and start over, so that lookup will grab
2238 * both the dquot and the freelistlock.
2240 if (dqp->dq_flags & XFS_DQ_WANT) {
2241 ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE));
2242 xfs_dqtrace_entry(dqp, "DQRECLAIM: DQWANT");
2244 xfs_qm_freelist_unlock(xfs_Gqm);
2245 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2247 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
2252 * If the dquot is inactive, we are assured that it is
2253 * not on the mplist or the hashlist, and that makes our
2256 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
2257 ASSERT(dqp->q_mount == NULL);
2258 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
2259 ASSERT(dqp->HL_PREVP == NULL);
2260 ASSERT(dqp->MPL_PREVP == NULL);
2261 XQM_FREELIST_REMOVE(dqp);
2264 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
2268 ASSERT(dqp->q_hash);
2269 ASSERT(dqp->MPL_PREVP);
2272 * Try to grab the flush lock. If this dquot is in the process of
2273 * getting flushed to disk, we don't want to reclaim it.
2275 if (! xfs_qm_dqflock_nowait(dqp)) {
2281 * We have the flush lock so we know that this is not in the
2282 * process of being flushed. So, if this is dirty, flush it
2283 * DELWRI so that we don't get a freelist infested with
2286 if (XFS_DQ_IS_DIRTY(dqp)) {
2287 xfs_dqtrace_entry(dqp, "DQRECLAIM: DQDIRTY");
2289 * We flush it delayed write, so don't bother
2290 * releasing the freelist lock.
2292 (void) xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
2293 xfs_dqunlock(dqp); /* dqflush unlocks dqflock */
2297 if (! xfs_qm_mplist_nowait(dqp->q_mount)) {
2303 if (! xfs_qm_dqhashlock_nowait(dqp))
2306 ASSERT(dqp->q_nrefs == 0);
2307 xfs_dqtrace_entry(dqp, "DQRECLAIM: UNLINKING");
2308 XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp);
2309 XQM_HASHLIST_REMOVE(dqp->q_hash, dqp);
2310 XQM_FREELIST_REMOVE(dqp);
2312 XFS_DQ_HASH_UNLOCK(dqp->q_hash);
2314 xfs_qm_mplist_unlock(dqp->q_mount);
2321 xfs_qm_freelist_unlock(xfs_Gqm);
2326 /*------------------------------------------------------------------*/
2329 * Return a new incore dquot. Depending on the number of
2330 * dquots in the system, we either allocate a new one on the kernel heap,
2331 * or reclaim a free one.
2332 * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed
2333 * to reclaim an existing one from the freelist.
2336 xfs_qm_dqalloc_incore(
2337 xfs_dquot_t **O_dqpp)
2342 * Check against high water mark to see if we want to pop
2343 * a nincompoop dquot off the freelist.
2345 if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) {
2347 * Try to recycle a dquot from the freelist.
2349 if ((dqp = xfs_qm_dqreclaim_one())) {
2350 XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
2352 * Just zero the core here. The rest will get
2353 * reinitialized by caller. XXX we shouldn't even
2356 memset(&dqp->q_core, 0, sizeof(dqp->q_core));
2360 XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
2364 * Allocate a brand new dquot on the kernel heap and return it
2365 * to the caller to initialize.
2367 ASSERT(xfs_Gqm->qm_dqzone != NULL);
2368 *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP);
2369 atomic_inc(&xfs_Gqm->qm_totaldquots);
2376 * Start a transaction and write the incore superblock changes to
2377 * disk. flags parameter indicates which fields have changed.
2380 xfs_qm_write_sb_changes(
2388 cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname);
2390 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
2391 if ((error = xfs_trans_reserve(tp, 0,
2392 mp->m_sb.sb_sectsize + 128, 0,
2394 XFS_DEFAULT_LOG_COUNT))) {
2395 xfs_trans_cancel(tp, 0);
2399 xfs_mod_sb(tp, flags);
2400 (void) xfs_trans_commit(tp, 0, NULL);
2406 /* --------------- utility functions for vnodeops ---------------- */
2410 * Given an inode, a uid and gid (from cred_t) make sure that we have
2411 * allocated relevant dquot(s) on disk, and that we won't exceed inode
2412 * quotas by creating this file.
2413 * This also attaches dquot(s) to the given inode after locking it,
2414 * and returns the dquots corresponding to the uid and/or gid.
2416 * in : inode (unlocked)
2417 * out : udquot, gdquot with references taken and unlocked
2426 xfs_dquot_t **O_udqpp,
2427 xfs_dquot_t **O_gdqpp)
2430 xfs_dquot_t *uq, *gq;
2433 if (!XFS_IS_QUOTA_ON(mp))
2436 lockflags = XFS_ILOCK_EXCL;
2437 xfs_ilock(ip, lockflags);
2439 if ((flags & XFS_QMOPT_INHERIT) &&
2440 XFS_INHERIT_GID(ip, XFS_MTOVFS(mp)))
2441 gid = ip->i_d.di_gid;
2444 * Attach the dquot(s) to this inode, doing a dquot allocation
2445 * if necessary. The dquot(s) will not be locked.
2447 if (XFS_NOT_DQATTACHED(mp, ip)) {
2448 if ((error = xfs_qm_dqattach(ip, XFS_QMOPT_DQALLOC |
2449 XFS_QMOPT_ILOCKED))) {
2450 xfs_iunlock(ip, lockflags);
2456 if ((flags & XFS_QMOPT_UQUOTA) &&
2457 XFS_IS_UQUOTA_ON(mp)) {
2458 if (ip->i_d.di_uid != uid) {
2460 * What we need is the dquot that has this uid, and
2461 * if we send the inode to dqget, the uid of the inode
2462 * takes priority over what's sent in the uid argument.
2463 * We must unlock inode here before calling dqget if
2464 * we're not sending the inode, because otherwise
2465 * we'll deadlock by doing trans_reserve while
2468 xfs_iunlock(ip, lockflags);
2469 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
2474 ASSERT(error != ENOENT);
2478 * Get the ilock in the right order.
2481 lockflags = XFS_ILOCK_SHARED;
2482 xfs_ilock(ip, lockflags);
2485 * Take an extra reference, because we'll return
2488 ASSERT(ip->i_udquot);
2495 if ((flags & XFS_QMOPT_GQUOTA) &&
2496 XFS_IS_GQUOTA_ON(mp)) {
2497 if (ip->i_d.di_gid != gid) {
2498 xfs_iunlock(ip, lockflags);
2499 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
2506 ASSERT(error != ENOENT);
2510 lockflags = XFS_ILOCK_SHARED;
2511 xfs_ilock(ip, lockflags);
2513 ASSERT(ip->i_gdquot);
2521 xfs_dqtrace_entry_ino(uq, "DQALLOC", ip);
2523 xfs_iunlock(ip, lockflags);
2536 * Actually transfer ownership, and do dquot modifications.
2537 * These were already reserved.
2543 xfs_dquot_t **IO_olddq,
2546 xfs_dquot_t *prevdq;
2547 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
2548 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
2553 ASSERT(prevdq != newdq);
2555 xfs_trans_mod_dquot(tp, prevdq,
2556 XFS_TRANS_DQ_BCOUNT,
2557 -(ip->i_d.di_nblocks));
2558 xfs_trans_mod_dquot(tp, prevdq,
2559 XFS_TRANS_DQ_ICOUNT,
2562 /* the sparkling new dquot */
2563 xfs_trans_mod_dquot(tp, newdq,
2564 XFS_TRANS_DQ_BCOUNT,
2565 ip->i_d.di_nblocks);
2566 xfs_trans_mod_dquot(tp, newdq,
2567 XFS_TRANS_DQ_ICOUNT,
2571 * Take an extra reference, because the inode
2572 * is going to keep this dquot pointer even
2573 * after the trans_commit.
2577 xfs_dqunlock(newdq);
2584 * Quota reservations for setattr(AT_UID|AT_GID).
2587 xfs_qm_vop_chown_reserve(
2597 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
2599 ASSERT(XFS_ISLOCKED_INODE(ip));
2601 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2603 delblks = ip->i_delayed_blks;
2604 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
2606 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
2607 ip->i_d.di_uid != (uid_t)INT_GET(udqp->q_core.d_id, ARCH_CONVERT)) {
2610 * If there are delayed allocation blocks, then we have to
2611 * unreserve those from the old dquot, and add them to the
2615 ASSERT(ip->i_udquot);
2616 unresudq = ip->i_udquot;
2619 if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
2620 ip->i_d.di_gid != INT_GET(gdqp->q_core.d_id, ARCH_CONVERT)) {
2623 ASSERT(ip->i_gdquot);
2624 unresgdq = ip->i_gdquot;
2628 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2629 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
2630 flags | XFS_QMOPT_RES_REGBLKS)))
2634 * Do the delayed blks reservations/unreservations now. Since, these
2635 * are done without the help of a transaction, if a reservation fails
2636 * its previous reservations won't be automatically undone by trans
2637 * code. So, we have to do it manually here.
2641 * Do the reservations first. Unreservation can't fail.
2643 ASSERT(delblksudq || delblksgdq);
2644 ASSERT(unresudq || unresgdq);
2645 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2646 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
2647 flags | XFS_QMOPT_RES_REGBLKS)))
2649 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2650 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
2651 XFS_QMOPT_RES_REGBLKS);
2658 xfs_qm_vop_rename_dqattach(
2659 xfs_inode_t **i_tab)
2667 if (! XFS_IS_QUOTA_ON(ip->i_mount))
2670 if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) {
2671 error = xfs_qm_dqattach(ip, 0);
2675 for (i = 1; (i < 4 && i_tab[i]); i++) {
2677 * Watch out for duplicate entries in the table.
2679 if ((ip = i_tab[i]) != i_tab[i-1]) {
2680 if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) {
2681 error = xfs_qm_dqattach(ip, 0);
2691 xfs_qm_vop_dqattach_and_dqmod_newinode(
2697 if (!XFS_IS_QUOTA_ON(tp->t_mountp))
2700 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
2701 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
2707 ASSERT(ip->i_udquot == NULL);
2708 ip->i_udquot = udqp;
2709 ASSERT(ip->i_d.di_uid == INT_GET(udqp->q_core.d_id, ARCH_CONVERT));
2710 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2716 ASSERT(ip->i_gdquot == NULL);
2717 ip->i_gdquot = gdqp;
2718 ASSERT(ip->i_d.di_gid == INT_GET(gdqp->q_core.d_id, ARCH_CONVERT));
2719 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2723 /* ------------- list stuff -----------------*/
2725 xfs_qm_freelist_init(xfs_frlist_t *ql)
2727 ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql;
2728 mutex_init(&ql->qh_lock, MUTEX_DEFAULT, "dqf");
2734 xfs_qm_freelist_destroy(xfs_frlist_t *ql)
2736 xfs_dquot_t *dqp, *nextdqp;
2738 mutex_lock(&ql->qh_lock, PINOD);
2739 for (dqp = ql->qh_next;
2740 dqp != (xfs_dquot_t *)ql; ) {
2742 nextdqp = dqp->dq_flnext;
2744 cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp);
2746 XQM_FREELIST_REMOVE(dqp);
2748 xfs_qm_dqdestroy(dqp);
2752 * Don't bother about unlocking.
2754 mutex_destroy(&ql->qh_lock);
2756 ASSERT(ql->qh_nelems == 0);
2760 xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq)
2762 dq->dq_flnext = ql->qh_next;
2763 dq->dq_flprev = (xfs_dquot_t *)ql;
2765 dq->dq_flnext->dq_flprev = dq;
2766 xfs_Gqm->qm_dqfreelist.qh_nelems++;
2767 xfs_Gqm->qm_dqfreelist.qh_version++;
2771 xfs_qm_freelist_unlink(xfs_dquot_t *dq)
2773 xfs_dquot_t *next = dq->dq_flnext;
2774 xfs_dquot_t *prev = dq->dq_flprev;
2776 next->dq_flprev = prev;
2777 prev->dq_flnext = next;
2778 dq->dq_flnext = dq->dq_flprev = dq;
2779 xfs_Gqm->qm_dqfreelist.qh_nelems--;
2780 xfs_Gqm->qm_dqfreelist.qh_version++;
2784 xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq)
2786 xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq);
2790 xfs_qm_dqhashlock_nowait(
2795 locked = mutex_trylock(&((dqp)->q_hash->qh_lock));
2800 xfs_qm_freelist_lock_nowait(
2805 locked = mutex_trylock(&(xqm->qm_dqfreelist.qh_lock));
2810 xfs_qm_mplist_nowait(
2815 ASSERT(mp->m_quotainfo);
2816 locked = mutex_trylock(&(XFS_QI_MPLLOCK(mp)));