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
24 #include "xfs_trans.h"
28 #include "xfs_alloc.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_quota.h"
31 #include "xfs_mount.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_dir2_sf.h"
36 #include "xfs_attr_sf.h"
37 #include "xfs_dinode.h"
38 #include "xfs_inode.h"
39 #include "xfs_btree.h"
40 #include "xfs_ialloc.h"
41 #include "xfs_itable.h"
42 #include "xfs_rtalloc.h"
43 #include "xfs_error.h"
48 #include "xfs_buf_item.h"
49 #include "xfs_trans_space.h"
50 #include "xfs_utils.h"
54 * The global quota manager. There is only one of these for the entire
55 * system, _not_ one per file system. XQM keeps track of the overall
56 * quota functionality, including maintaining the freelist and hash
60 struct xfs_qm *xfs_Gqm;
63 kmem_zone_t *qm_dqzone;
64 kmem_zone_t *qm_dqtrxzone;
65 static struct shrinker *xfs_qm_shaker;
67 static cred_t xfs_zerocr;
69 STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int);
70 STATIC void xfs_qm_list_destroy(xfs_dqlist_t *);
72 STATIC void xfs_qm_freelist_init(xfs_frlist_t *);
73 STATIC void xfs_qm_freelist_destroy(xfs_frlist_t *);
74 STATIC int xfs_qm_mplist_nowait(xfs_mount_t *);
75 STATIC int xfs_qm_dqhashlock_nowait(xfs_dquot_t *);
77 STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
78 STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
79 STATIC int xfs_qm_shake(int, gfp_t);
82 extern mutex_t qcheck_lock;
86 #define XQM_LIST_PRINT(l, NXT, title) \
88 xfs_dquot_t *dqp; int i = 0; \
89 cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
90 for (dqp = (l)->qh_next; dqp != NULL; dqp = dqp->NXT) { \
91 cmn_err(CE_DEBUG, " %d. \"%d (%s)\" " \
92 "bcnt = %d, icnt = %d, refs = %d", \
93 ++i, (int) be32_to_cpu(dqp->q_core.d_id), \
94 DQFLAGTO_TYPESTR(dqp), \
95 (int) be64_to_cpu(dqp->q_core.d_bcount), \
96 (int) be64_to_cpu(dqp->q_core.d_icount), \
97 (int) dqp->q_nrefs); } \
100 #define XQM_LIST_PRINT(l, NXT, title) do { } while (0)
104 * Initialize the XQM structure.
105 * Note that there is not one quota manager per file system.
107 STATIC struct xfs_qm *
110 xfs_dqhash_t *udqhash, *gdqhash;
116 * Initialize the dquot hash tables.
118 udqhash = kmem_zalloc_greedy(&hsize,
119 XFS_QM_HASHSIZE_LOW, XFS_QM_HASHSIZE_HIGH,
120 KM_SLEEP | KM_MAYFAIL | KM_LARGE);
121 gdqhash = kmem_zalloc(hsize, KM_SLEEP | KM_LARGE);
122 hsize /= sizeof(xfs_dqhash_t);
125 xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
126 xqm->qm_dqhashmask = hsize - 1;
127 xqm->qm_usr_dqhtable = udqhash;
128 xqm->qm_grp_dqhtable = gdqhash;
129 ASSERT(xqm->qm_usr_dqhtable != NULL);
130 ASSERT(xqm->qm_grp_dqhtable != NULL);
132 for (i = 0; i < hsize; i++) {
133 xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i);
134 xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i);
138 * Freelist of all dquots of all file systems
140 xfs_qm_freelist_init(&(xqm->qm_dqfreelist));
143 * dquot zone. we register our own low-memory callback.
146 xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t),
148 qm_dqzone = xqm->qm_dqzone;
150 xqm->qm_dqzone = qm_dqzone;
152 xfs_qm_shaker = set_shrinker(DEFAULT_SEEKS, xfs_qm_shake);
155 * The t_dqinfo portion of transactions.
158 xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t),
160 qm_dqtrxzone = xqm->qm_dqtrxzone;
162 xqm->qm_dqtrxzone = qm_dqtrxzone;
164 atomic_set(&xqm->qm_totaldquots, 0);
165 xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO;
168 mutex_init(&qcheck_lock);
174 * Destroy the global quota manager when its reference count goes to zero.
183 ASSERT(xqm->qm_nrefs == 0);
184 remove_shrinker(xfs_qm_shaker);
185 hsize = xqm->qm_dqhashmask + 1;
186 for (i = 0; i < hsize; i++) {
187 xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
188 xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
190 kmem_free(xqm->qm_usr_dqhtable, hsize * sizeof(xfs_dqhash_t));
191 kmem_free(xqm->qm_grp_dqhtable, hsize * sizeof(xfs_dqhash_t));
192 xqm->qm_usr_dqhtable = NULL;
193 xqm->qm_grp_dqhtable = NULL;
194 xqm->qm_dqhashmask = 0;
195 xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist));
197 mutex_destroy(&qcheck_lock);
199 kmem_free(xqm, sizeof(xfs_qm_t));
203 * Called at mount time to let XQM know that another file system is
204 * starting quotas. This isn't crucial information as the individual mount
205 * structures are pretty independent, but it helps the XQM keep a
206 * global view of what's going on.
210 xfs_qm_hold_quotafs_ref(
211 struct xfs_mount *mp)
214 * Need to lock the xfs_Gqm structure for things like this. For example,
215 * the structure could disappear between the entry to this routine and
216 * a HOLD operation if not locked.
218 XFS_QM_LOCK(xfs_Gqm);
221 xfs_Gqm = xfs_Gqm_init();
223 * We can keep a list of all filesystems with quotas mounted for
224 * debugging and statistical purposes, but ...
225 * Just take a reference and get out.
227 XFS_QM_HOLD(xfs_Gqm);
228 XFS_QM_UNLOCK(xfs_Gqm);
235 * Release the reference that a filesystem took at mount time,
236 * so that we know when we need to destroy the entire quota manager.
240 xfs_qm_rele_quotafs_ref(
241 struct xfs_mount *mp)
243 xfs_dquot_t *dqp, *nextdqp;
246 ASSERT(xfs_Gqm->qm_nrefs > 0);
249 * Go thru the freelist and destroy all inactive dquots.
251 xfs_qm_freelist_lock(xfs_Gqm);
253 for (dqp = xfs_Gqm->qm_dqfreelist.qh_next;
254 dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) {
256 nextdqp = dqp->dq_flnext;
257 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
258 ASSERT(dqp->q_mount == NULL);
259 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
260 ASSERT(dqp->HL_PREVP == NULL);
261 ASSERT(dqp->MPL_PREVP == NULL);
262 XQM_FREELIST_REMOVE(dqp);
264 xfs_qm_dqdestroy(dqp);
270 xfs_qm_freelist_unlock(xfs_Gqm);
273 * Destroy the entire XQM. If somebody mounts with quotaon, this'll
276 XFS_QM_LOCK(xfs_Gqm);
277 XFS_QM_RELE(xfs_Gqm);
278 if (xfs_Gqm->qm_nrefs == 0) {
279 xfs_qm_destroy(xfs_Gqm);
282 XFS_QM_UNLOCK(xfs_Gqm);
286 * This is called at mount time from xfs_mountfs to initialize the quotainfo
287 * structure and start the global quota manager (xfs_Gqm) if it hasn't done
288 * so already. Note that the superblock has not been read in yet.
291 xfs_qm_mount_quotainit(
296 * User, projects or group quotas has to be on.
298 ASSERT(flags & (XFSMNT_UQUOTA | XFSMNT_PQUOTA | XFSMNT_GQUOTA));
301 * Initialize the flags in the mount structure. From this point
302 * onwards we look at m_qflags to figure out if quotas's ON/OFF, etc.
303 * Note that we enforce nothing if accounting is off.
304 * ie. XFSMNT_*QUOTA must be ON for XFSMNT_*QUOTAENF.
305 * It isn't necessary to take the quotaoff lock to do this; this is
308 if (flags & XFSMNT_UQUOTA) {
309 mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
310 if (flags & XFSMNT_UQUOTAENF)
311 mp->m_qflags |= XFS_UQUOTA_ENFD;
313 if (flags & XFSMNT_GQUOTA) {
314 mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
315 if (flags & XFSMNT_GQUOTAENF)
316 mp->m_qflags |= XFS_OQUOTA_ENFD;
317 } else if (flags & XFSMNT_PQUOTA) {
318 mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
319 if (flags & XFSMNT_PQUOTAENF)
320 mp->m_qflags |= XFS_OQUOTA_ENFD;
325 * Just destroy the quotainfo structure.
328 xfs_qm_unmount_quotadestroy(
332 xfs_qm_destroy_quotainfo(mp);
337 * This is called from xfs_mountfs to start quotas and initialize all
338 * necessary data structures like quotainfo. This is also responsible for
339 * running a quotacheck as necessary. We are guaranteed that the superblock
340 * is consistently read in at this point.
353 * If quotas on realtime volumes is not supported, we disable
354 * quotas immediately.
356 if (mp->m_sb.sb_rextents) {
358 "Cannot turn on quotas for realtime filesystem %s",
364 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
367 * Allocate the quotainfo structure inside the mount struct, and
368 * create quotainode(s), and change/rev superblock if necessary.
370 if ((error = xfs_qm_init_quotainfo(mp))) {
372 * We must turn off quotas.
374 ASSERT(mp->m_quotainfo == NULL);
379 * If any of the quotas are not consistent, do a quotacheck.
381 if (XFS_QM_NEED_QUOTACHECK(mp) &&
382 !(mfsi_flags & XFS_MFSI_NO_QUOTACHECK)) {
383 if ((error = xfs_qm_quotacheck(mp))) {
384 /* Quotacheck has failed and quotas have
387 return XFS_ERROR(error);
391 * If one type of quotas is off, then it will lose its
392 * quotachecked status, since we won't be doing accounting for
395 if (!XFS_IS_UQUOTA_ON(mp)) {
396 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
398 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp))) {
399 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
404 * We actually don't have to acquire the SB_LOCK at all.
405 * This can only be called from mount, and that's single threaded. XXX
408 sbf = mp->m_sb.sb_qflags;
409 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
410 XFS_SB_UNLOCK(mp, s);
412 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
413 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
415 * We could only have been turning quotas off.
416 * We aren't in very good shape actually because
417 * the incore structures are convinced that quotas are
418 * off, but the on disk superblock doesn't know that !
420 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
421 xfs_fs_cmn_err(CE_ALERT, mp,
422 "XFS mount_quotas: Superblock update failed!");
427 xfs_fs_cmn_err(CE_WARN, mp,
428 "Failed to initialize disk quotas.");
430 return XFS_ERROR(error);
434 * Called from the vfsops layer.
437 xfs_qm_unmount_quotas(
440 xfs_inode_t *uqp, *gqp;
444 * Release the dquots that root inode, et al might be holding,
445 * before we flush quotas and blow away the quotainfo structure.
447 ASSERT(mp->m_rootip);
448 xfs_qm_dqdetach(mp->m_rootip);
450 xfs_qm_dqdetach(mp->m_rbmip);
452 xfs_qm_dqdetach(mp->m_rsumip);
455 * Flush out the quota inodes.
458 if (mp->m_quotainfo) {
459 if ((uqp = mp->m_quotainfo->qi_uquotaip) != NULL) {
460 xfs_ilock(uqp, XFS_ILOCK_EXCL);
462 error = xfs_iflush(uqp, XFS_IFLUSH_SYNC);
463 xfs_iunlock(uqp, XFS_ILOCK_EXCL);
464 if (unlikely(error == EFSCORRUPTED)) {
465 XFS_ERROR_REPORT("xfs_qm_unmount_quotas(1)",
466 XFS_ERRLEVEL_LOW, mp);
470 if ((gqp = mp->m_quotainfo->qi_gquotaip) != NULL) {
471 xfs_ilock(gqp, XFS_ILOCK_EXCL);
473 error = xfs_iflush(gqp, XFS_IFLUSH_SYNC);
474 xfs_iunlock(gqp, XFS_ILOCK_EXCL);
475 if (unlikely(error == EFSCORRUPTED)) {
476 XFS_ERROR_REPORT("xfs_qm_unmount_quotas(2)",
477 XFS_ERRLEVEL_LOW, mp);
483 XFS_PURGE_INODE(uqp);
484 mp->m_quotainfo->qi_uquotaip = NULL;
487 XFS_PURGE_INODE(gqp);
488 mp->m_quotainfo->qi_gquotaip = NULL;
491 return XFS_ERROR(error);
495 * Flush all dquots of the given file system to disk. The dquots are
496 * _not_ purged from memory here, just their data written to disk.
508 if (mp->m_quotainfo == NULL)
512 xfs_qm_mplist_lock(mp);
513 FOREACH_DQUOT_IN_MP(dqp, mp) {
515 if (! XFS_DQ_IS_DIRTY(dqp)) {
519 xfs_dqtrace_entry(dqp, "FLUSHALL: DQDIRTY");
520 /* XXX a sentinel would be better */
521 recl = XFS_QI_MPLRECLAIMS(mp);
522 if (! xfs_qm_dqflock_nowait(dqp)) {
524 * If we can't grab the flush lock then check
525 * to see if the dquot has been flushed delayed
526 * write. If so, grab its buffer and send it
527 * out immediately. We'll be able to acquire
528 * the flush lock when the I/O completes.
530 xfs_qm_dqflock_pushbuf_wait(dqp);
533 * Let go of the mplist lock. We don't want to hold it
534 * across a disk write.
536 xfs_qm_mplist_unlock(mp);
537 error = xfs_qm_dqflush(dqp, flags);
542 xfs_qm_mplist_lock(mp);
543 if (recl != XFS_QI_MPLRECLAIMS(mp)) {
544 xfs_qm_mplist_unlock(mp);
545 /* XXX restart limit */
550 xfs_qm_mplist_unlock(mp);
555 * Release the group dquot pointers the user dquots may be
556 * carrying around as a hint. mplist is locked on entry and exit.
559 xfs_qm_detach_gdquots(
562 xfs_dquot_t *dqp, *gdqp;
566 ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
567 dqp = XFS_QI_MPLNEXT(mp);
570 if ((gdqp = dqp->q_gdquot)) {
572 dqp->q_gdquot = NULL;
578 * Can't hold the mplist lock across a dqput.
579 * XXXmust convert to marker based iterations here.
581 nrecl = XFS_QI_MPLRECLAIMS(mp);
582 xfs_qm_mplist_unlock(mp);
585 xfs_qm_mplist_lock(mp);
586 if (nrecl != XFS_QI_MPLRECLAIMS(mp))
594 * Go through all the incore dquots of this file system and take them
595 * off the mplist and hashlist, if the dquot type matches the dqtype
596 * parameter. This is used when turning off quota accounting for
597 * users and/or groups, as well as when the filesystem is unmounting.
602 uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/PQUOTA/GQUOTA */
607 xfs_dquot_t *nextdqp;
610 if (mp->m_quotainfo == NULL)
613 dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
614 dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0;
615 dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
617 xfs_qm_mplist_lock(mp);
620 * In the first pass through all incore dquots of this filesystem,
621 * we release the group dquot pointers the user dquots may be
622 * carrying around as a hint. We need to do this irrespective of
623 * what's being turned off.
625 xfs_qm_detach_gdquots(mp);
629 ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
631 * Try to get rid of all of the unwanted dquots. The idea is to
632 * get them off mplist and hashlist, but leave them on freelist.
634 dqp = XFS_QI_MPLNEXT(mp);
637 * It's OK to look at the type without taking dqlock here.
638 * We're holding the mplist lock here, and that's needed for
641 if ((dqp->dq_flags & dqtype) == 0) {
646 if (! xfs_qm_dqhashlock_nowait(dqp)) {
647 nrecl = XFS_QI_MPLRECLAIMS(mp);
648 xfs_qm_mplist_unlock(mp);
649 XFS_DQ_HASH_LOCK(dqp->q_hash);
650 xfs_qm_mplist_lock(mp);
653 * XXXTheoretically, we can get into a very long
654 * ping pong game here.
655 * No one can be adding dquots to the mplist at
656 * this point, but somebody might be taking things off.
658 if (nrecl != XFS_QI_MPLRECLAIMS(mp)) {
659 XFS_DQ_HASH_UNLOCK(dqp->q_hash);
665 * Take the dquot off the mplist and hashlist. It may remain on
666 * freelist in INACTIVE state.
668 nextdqp = dqp->MPL_NEXT;
669 nmisses += xfs_qm_dqpurge(dqp, flags);
672 xfs_qm_mplist_unlock(mp);
684 * Purge the dquot cache.
685 * None of the dquots should really be busy at this point.
687 if (mp->m_quotainfo) {
688 while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
702 xfs_dquot_t *udqhint, /* hint */
703 xfs_dquot_t **IO_idqpp)
708 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
711 * See if we already have it in the inode itself. IO_idqpp is
712 * &i_udquot or &i_gdquot. This made the code look weird, but
713 * made the logic a lot simpler.
715 if ((dqp = *IO_idqpp)) {
718 xfs_dqtrace_entry(dqp, "DQATTACH: found in ip");
723 * udqhint is the i_udquot field in inode, and is non-NULL only
724 * when the type arg is group/project. Its purpose is to save a
725 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
728 ASSERT(!udqhint || type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
729 if (udqhint && !dolock)
733 * No need to take dqlock to look at the id.
734 * The ID can't change until it gets reclaimed, and it won't
735 * be reclaimed as long as we have a ref from inode and we hold
739 (dqp = udqhint->q_gdquot) &&
740 (be32_to_cpu(dqp->q_core.d_id) == id)) {
741 ASSERT(XFS_DQ_IS_LOCKED(udqhint));
744 ASSERT(*IO_idqpp == NULL);
748 xfs_dqunlock(udqhint);
753 * We can't hold a dquot lock when we call the dqget code.
754 * We'll deadlock in no time, because of (not conforming to)
755 * lock ordering - the inodelock comes before any dquot lock,
756 * and we may drop and reacquire the ilock in xfs_qm_dqget().
759 xfs_dqunlock(udqhint);
761 * Find the dquot from somewhere. This bumps the
762 * reference count of dquot and returns it locked.
763 * This can return ENOENT if dquot didn't exist on
764 * disk and we didn't ask it to allocate;
765 * ESRCH if quotas got turned off suddenly.
767 if ((error = xfs_qm_dqget(ip->i_mount, ip, id, type,
768 doalloc|XFS_QMOPT_DOWARN, &dqp))) {
769 if (udqhint && dolock)
774 xfs_dqtrace_entry(dqp, "DQATTACH: found by dqget");
776 * dqget may have dropped and re-acquired the ilock, but it guarantees
777 * that the dquot returned is the one that should go in the inode.
781 ASSERT(XFS_DQ_IS_LOCKED(dqp));
791 ASSERT(XFS_DQ_IS_LOCKED(dqp));
792 if (! xfs_qm_dqlock_nowait(udqhint)) {
801 ASSERT(XFS_DQ_IS_LOCKED(udqhint));
805 ASSERT(XFS_DQ_IS_LOCKED(dqp));
813 * Given a udquot and gdquot, attach a ptr to the group dquot in the
814 * udquot as a hint for future lookups. The idea sounds simple, but the
815 * execution isn't, because the udquot might have a group dquot attached
816 * already and getting rid of that gets us into lock ordering constraints.
817 * The process is complicated more by the fact that the dquots may or may not
818 * be locked on entry.
821 xfs_qm_dqattach_grouphint(
830 ASSERT(XFS_DQ_IS_LOCKED(udq));
831 ASSERT(XFS_DQ_IS_LOCKED(gdq));
837 if ((tmp = udq->q_gdquot)) {
844 udq->q_gdquot = NULL;
846 * We can't keep any dqlocks when calling dqrele,
847 * because the freelist lock comes before dqlocks.
853 * we took a hard reference once upon a time in dqget,
854 * so give it back when the udquot no longer points at it
855 * dqput() does the unlocking of the dquot.
863 ASSERT(XFS_DQ_IS_LOCKED(udq));
869 ASSERT(XFS_DQ_IS_LOCKED(udq));
870 ASSERT(XFS_DQ_IS_LOCKED(gdq));
872 * Somebody could have attached a gdquot here,
873 * when we dropped the uqlock. If so, just do nothing.
875 if (udq->q_gdquot == NULL) {
887 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
889 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
890 * If XFS_QMOPT_DQLOCK, the dquot(s) will be returned locked. This option pretty
891 * much made this code a complete mess, but it has been pretty useful.
892 * If XFS_QMOPT_ILOCKED, then inode sent is already locked EXCL.
893 * Inode may get unlocked and relocked in here, and the caller must deal with
901 xfs_mount_t *mp = ip->i_mount;
905 if ((! XFS_IS_QUOTA_ON(mp)) ||
906 (! XFS_NOT_DQATTACHED(mp, ip)) ||
907 (ip->i_ino == mp->m_sb.sb_uquotino) ||
908 (ip->i_ino == mp->m_sb.sb_gquotino))
911 ASSERT((flags & XFS_QMOPT_ILOCKED) == 0 ||
912 XFS_ISLOCKED_INODE_EXCL(ip));
914 if (! (flags & XFS_QMOPT_ILOCKED))
915 xfs_ilock(ip, XFS_ILOCK_EXCL);
917 if (XFS_IS_UQUOTA_ON(mp)) {
918 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
919 flags & XFS_QMOPT_DQALLOC,
920 flags & XFS_QMOPT_DQLOCK,
921 NULL, &ip->i_udquot);
926 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
927 if (XFS_IS_OQUOTA_ON(mp)) {
928 error = XFS_IS_GQUOTA_ON(mp) ?
929 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
930 flags & XFS_QMOPT_DQALLOC,
931 flags & XFS_QMOPT_DQLOCK,
932 ip->i_udquot, &ip->i_gdquot) :
933 xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ,
934 flags & XFS_QMOPT_DQALLOC,
935 flags & XFS_QMOPT_DQLOCK,
936 ip->i_udquot, &ip->i_gdquot);
938 * Don't worry about the udquot that we may have
939 * attached above. It'll get detached, if not already.
947 * Attach this group quota to the user quota as a hint.
948 * This WON'T, in general, result in a thrash.
951 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
952 ASSERT(ip->i_udquot);
953 ASSERT(ip->i_gdquot);
956 * We may or may not have the i_udquot locked at this point,
957 * but this check is OK since we don't depend on the i_gdquot to
958 * be accurate 100% all the time. It is just a hint, and this
959 * will succeed in general.
961 if (ip->i_udquot->q_gdquot == ip->i_gdquot)
964 * Attach i_gdquot to the gdquot hint inside the i_udquot.
966 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot,
967 flags & XFS_QMOPT_DQLOCK);
975 if (flags & XFS_QMOPT_DQLOCK)
976 ASSERT(XFS_DQ_IS_LOCKED(ip->i_udquot));
979 if (flags & XFS_QMOPT_DQLOCK)
980 ASSERT(XFS_DQ_IS_LOCKED(ip->i_gdquot));
982 if (XFS_IS_UQUOTA_ON(mp))
983 ASSERT(ip->i_udquot);
984 if (XFS_IS_OQUOTA_ON(mp))
985 ASSERT(ip->i_gdquot);
989 if (! (flags & XFS_QMOPT_ILOCKED))
990 xfs_iunlock(ip, XFS_ILOCK_EXCL);
994 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
1000 * Release dquots (and their references) if any.
1001 * The inode should be locked EXCL except when this's called by
1008 if (!(ip->i_udquot || ip->i_gdquot))
1011 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
1012 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
1014 xfs_dqtrace_entry_ino(ip->i_udquot, "DQDETTACH", ip);
1015 xfs_qm_dqrele(ip->i_udquot);
1016 ip->i_udquot = NULL;
1019 xfs_dqtrace_entry_ino(ip->i_gdquot, "DQDETTACH", ip);
1020 xfs_qm_dqrele(ip->i_gdquot);
1021 ip->i_gdquot = NULL;
1026 * This is called by VFS_SYNC and flags arg determines the caller,
1027 * and its motives, as done in xfs_sync.
1029 * vfs_sync: SYNC_FSDATA|SYNC_ATTR|SYNC_BDFLUSH 0x31
1030 * syscall sync: SYNC_FSDATA|SYNC_ATTR|SYNC_DELWRI 0x25
1031 * umountroot : SYNC_WAIT | SYNC_CLOSE | SYNC_ATTR | SYNC_FSDATA
1047 * We won't block unless we are asked to.
1049 nowait = (boolean_t)(flags & SYNC_BDFLUSH || (flags & SYNC_WAIT) == 0);
1052 xfs_qm_mplist_lock(mp);
1054 * dqpurge_all() also takes the mplist lock and iterate thru all dquots
1055 * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared
1056 * when we have the mplist lock, we know that dquots will be consistent
1057 * as long as we have it locked.
1059 if (! XFS_IS_QUOTA_ON(mp)) {
1060 xfs_qm_mplist_unlock(mp);
1063 FOREACH_DQUOT_IN_MP(dqp, mp) {
1065 * If this is vfs_sync calling, then skip the dquots that
1066 * don't 'seem' to be dirty. ie. don't acquire dqlock.
1067 * This is very similar to what xfs_sync does with inodes.
1069 if (flags & SYNC_BDFLUSH) {
1070 if (! XFS_DQ_IS_DIRTY(dqp))
1076 * Try to acquire the dquot lock. We are NOT out of
1077 * lock order, but we just don't want to wait for this
1078 * lock, unless somebody wanted us to.
1080 if (! xfs_qm_dqlock_nowait(dqp))
1087 * Now, find out for sure if this dquot is dirty or not.
1089 if (! XFS_DQ_IS_DIRTY(dqp)) {
1094 /* XXX a sentinel would be better */
1095 recl = XFS_QI_MPLRECLAIMS(mp);
1096 if (! xfs_qm_dqflock_nowait(dqp)) {
1102 * If we can't grab the flush lock then if the caller
1103 * really wanted us to give this our best shot, so
1104 * see if we can give a push to the buffer before we wait
1105 * on the flush lock. At this point, we know that
1106 * even though the dquot is being flushed,
1107 * it has (new) dirty data.
1109 xfs_qm_dqflock_pushbuf_wait(dqp);
1112 * Let go of the mplist lock. We don't want to hold it
1113 * across a disk write
1115 flush_flags = (nowait) ? XFS_QMOPT_DELWRI : XFS_QMOPT_SYNC;
1116 xfs_qm_mplist_unlock(mp);
1117 xfs_dqtrace_entry(dqp, "XQM_SYNC: DQFLUSH");
1118 error = xfs_qm_dqflush(dqp, flush_flags);
1120 if (error && XFS_FORCED_SHUTDOWN(mp))
1121 return 0; /* Need to prevent umount failure */
1125 xfs_qm_mplist_lock(mp);
1126 if (recl != XFS_QI_MPLRECLAIMS(mp)) {
1127 if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS)
1130 xfs_qm_mplist_unlock(mp);
1135 xfs_qm_mplist_unlock(mp);
1141 * This initializes all the quota information that's kept in the
1145 xfs_qm_init_quotainfo(
1148 xfs_quotainfo_t *qinf;
1152 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1155 * Tell XQM that we exist as soon as possible.
1157 if ((error = xfs_qm_hold_quotafs_ref(mp))) {
1161 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
1164 * See if quotainodes are setup, and if not, allocate them,
1165 * and change the superblock accordingly.
1167 if ((error = xfs_qm_init_quotainos(mp))) {
1168 kmem_free(qinf, sizeof(xfs_quotainfo_t));
1169 mp->m_quotainfo = NULL;
1173 spinlock_init(&qinf->qi_pinlock, "xfs_qinf_pin");
1174 xfs_qm_list_init(&qinf->qi_dqlist, "mpdqlist", 0);
1175 qinf->qi_dqreclaims = 0;
1177 /* mutex used to serialize quotaoffs */
1178 mutex_init(&qinf->qi_quotaofflock);
1180 /* Precalc some constants */
1181 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1182 ASSERT(qinf->qi_dqchunklen);
1183 qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
1184 do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
1186 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
1189 * We try to get the limits from the superuser's limits fields.
1190 * This is quite hacky, but it is standard quota practice.
1191 * We look at the USR dquot with id == 0 first, but if user quotas
1192 * are not enabled we goto the GRP dquot with id == 0.
1193 * We don't really care to keep separate default limits for user
1194 * and group quotas, at least not at this point.
1196 error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0,
1197 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
1198 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
1200 XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN,
1203 xfs_disk_dquot_t *ddqp = &dqp->q_core;
1206 * The warnings and timers set the grace period given to
1207 * a user or group before he or she can not perform any
1208 * more writing. If it is zero, a default is used.
1210 qinf->qi_btimelimit = ddqp->d_btimer ?
1211 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
1212 qinf->qi_itimelimit = ddqp->d_itimer ?
1213 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
1214 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
1215 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
1216 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
1217 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
1218 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
1219 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
1220 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
1221 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
1222 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
1223 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
1224 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
1225 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
1226 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
1227 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
1230 * We sent the XFS_QMOPT_DQSUSER flag to dqget because
1231 * we don't want this dquot cached. We haven't done a
1232 * quotacheck yet, and quotacheck doesn't like incore dquots.
1234 xfs_qm_dqdestroy(dqp);
1236 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
1237 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
1238 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
1239 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
1240 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
1241 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
1249 * Gets called when unmounting a filesystem or when all quotas get
1251 * This purges the quota inodes, destroys locks and frees itself.
1254 xfs_qm_destroy_quotainfo(
1257 xfs_quotainfo_t *qi;
1259 qi = mp->m_quotainfo;
1261 ASSERT(xfs_Gqm != NULL);
1264 * Release the reference that XQM kept, so that we know
1265 * when the XQM structure should be freed. We cannot assume
1266 * that xfs_Gqm is non-null after this point.
1268 xfs_qm_rele_quotafs_ref(mp);
1270 spinlock_destroy(&qi->qi_pinlock);
1271 xfs_qm_list_destroy(&qi->qi_dqlist);
1273 if (qi->qi_uquotaip) {
1274 XFS_PURGE_INODE(qi->qi_uquotaip);
1275 qi->qi_uquotaip = NULL; /* paranoia */
1277 if (qi->qi_gquotaip) {
1278 XFS_PURGE_INODE(qi->qi_gquotaip);
1279 qi->qi_gquotaip = NULL;
1281 mutex_destroy(&qi->qi_quotaofflock);
1282 kmem_free(qi, sizeof(xfs_quotainfo_t));
1283 mp->m_quotainfo = NULL;
1288 /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
1297 mutex_init(&list->qh_lock);
1298 list->qh_next = NULL;
1299 list->qh_version = 0;
1300 list->qh_nelems = 0;
1304 xfs_qm_list_destroy(
1307 mutex_destroy(&(list->qh_lock));
1312 * Stripped down version of dqattach. This doesn't attach, or even look at the
1313 * dquots attached to the inode. The rationale is that there won't be any
1314 * attached at the time this is called from quotacheck.
1317 xfs_qm_dqget_noattach(
1319 xfs_dquot_t **O_udqpp,
1320 xfs_dquot_t **O_gdqpp)
1324 xfs_dquot_t *udqp, *gdqp;
1326 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
1331 if (XFS_IS_UQUOTA_ON(mp)) {
1332 ASSERT(ip->i_udquot == NULL);
1334 * We want the dquot allocated if it doesn't exist.
1336 if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER,
1337 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN,
1340 * Shouldn't be able to turn off quotas here.
1342 ASSERT(error != ESRCH);
1343 ASSERT(error != ENOENT);
1349 if (XFS_IS_OQUOTA_ON(mp)) {
1350 ASSERT(ip->i_gdquot == NULL);
1353 error = XFS_IS_GQUOTA_ON(mp) ?
1354 xfs_qm_dqget(mp, ip,
1355 ip->i_d.di_gid, XFS_DQ_GROUP,
1356 XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN,
1358 xfs_qm_dqget(mp, ip,
1359 ip->i_d.di_projid, XFS_DQ_PROJ,
1360 XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN,
1364 xfs_qm_dqrele(udqp);
1365 ASSERT(error != ESRCH);
1366 ASSERT(error != ENOENT);
1371 /* Reacquire the locks in the right order */
1373 if (! xfs_qm_dqlock_nowait(udqp)) {
1385 if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp));
1386 if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp));
1392 * Create an inode and return with a reference already taken, but unlocked
1393 * This is how we create quota inodes
1407 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
1408 if ((error = xfs_trans_reserve(tp,
1409 XFS_QM_QINOCREATE_SPACE_RES(mp),
1410 XFS_CREATE_LOG_RES(mp), 0,
1411 XFS_TRANS_PERM_LOG_RES,
1412 XFS_CREATE_LOG_COUNT))) {
1413 xfs_trans_cancel(tp, 0);
1417 if ((error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0,
1418 &xfs_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))) {
1467 xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!");
1475 xfs_qm_reset_dqcounts(
1481 xfs_disk_dquot_t *ddq;
1484 xfs_buftrace("RESET DQUOTS", bp);
1486 * Reset all counters and timers. They'll be
1487 * started afresh by xfs_qm_quotacheck.
1490 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
1491 do_div(j, sizeof(xfs_dqblk_t));
1492 ASSERT(XFS_QM_DQPERBLK(mp) == j);
1494 ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp);
1495 for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) {
1497 * Do a sanity check, and if needed, repair the dqblk. Don't
1498 * output any warnings because it's perfectly possible to
1499 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
1501 (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1505 ddq->d_rtbcount = 0;
1508 ddq->d_rtbtimer = 0;
1511 ddq->d_rtbwarns = 0;
1512 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
1523 xfs_filblks_t blkcnt,
1534 incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ?
1535 XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt;
1536 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
1537 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
1541 * Blkcnt arg can be a very big number, and might even be
1542 * larger than the log itself. So, we have to break it up into
1543 * manageable-sized transactions.
1544 * Note that we don't start a permanent transaction here; we might
1545 * not be able to get a log reservation for the whole thing up front,
1546 * and we don't really care to either, because we just discard
1547 * everything if we were to crash in the middle of this loop.
1550 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1551 XFS_FSB_TO_DADDR(mp, bno),
1552 (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp);
1556 (void) xfs_qm_reset_dqcounts(mp, bp, firstid, type);
1557 xfs_bdwrite(mp, bp);
1559 * goto the next block.
1562 firstid += XFS_QM_DQPERBLK(mp);
1568 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1569 * caller supplied function for every chunk of dquots that we find.
1577 xfs_bmbt_irec_t *map;
1578 int i, nmaps; /* number of map entries */
1579 int error; /* return value */
1580 xfs_fileoff_t lblkno;
1581 xfs_filblks_t maxlblkcnt;
1583 xfs_fsblock_t rablkno;
1584 xfs_filblks_t rablkcnt;
1588 * This looks racy, but we can't keep an inode lock across a
1589 * trans_reserve. But, this gets called during quotacheck, and that
1590 * happens only at mount time which is single threaded.
1592 if (qip->i_d.di_nblocks == 0)
1595 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
1598 maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
1600 nmaps = XFS_DQITER_MAP_SIZE;
1602 * We aren't changing the inode itself. Just changing
1603 * some of its data. No new blocks are added here, and
1604 * the inode is never added to the transaction.
1606 xfs_ilock(qip, XFS_ILOCK_SHARED);
1607 error = xfs_bmapi(NULL, qip, lblkno,
1608 maxlblkcnt - lblkno,
1611 0, map, &nmaps, NULL, NULL);
1612 xfs_iunlock(qip, XFS_ILOCK_SHARED);
1616 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1617 for (i = 0; i < nmaps; i++) {
1618 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1619 ASSERT(map[i].br_blockcount);
1622 lblkno += map[i].br_blockcount;
1624 if (map[i].br_startblock == HOLESTARTBLOCK)
1627 firstid = (xfs_dqid_t) map[i].br_startoff *
1628 XFS_QM_DQPERBLK(mp);
1630 * Do a read-ahead on the next extent.
1632 if ((i+1 < nmaps) &&
1633 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1634 rablkcnt = map[i+1].br_blockcount;
1635 rablkno = map[i+1].br_startblock;
1636 while (rablkcnt--) {
1637 xfs_baread(mp->m_ddev_targp,
1638 XFS_FSB_TO_DADDR(mp, rablkno),
1639 (int)XFS_QI_DQCHUNKLEN(mp));
1644 * Iterate thru all the blks in the extent and
1645 * reset the counters of all the dquots inside them.
1647 if ((error = xfs_qm_dqiter_bufs(mp,
1649 map[i].br_startblock,
1650 map[i].br_blockcount,
1658 } while (nmaps > 0);
1660 kmem_free(map, XFS_DQITER_MAP_SIZE * sizeof(*map));
1666 * Called by dqusage_adjust in doing a quotacheck.
1667 * Given the inode, and a dquot (either USR or GRP, doesn't matter),
1668 * this updates its incore copy as well as the buffer copy. This is
1669 * so that once the quotacheck is done, we can just log all the buffers,
1670 * as opposed to logging numerous updates to individual dquots.
1673 xfs_qm_quotacheck_dqadjust(
1678 ASSERT(XFS_DQ_IS_LOCKED(dqp));
1679 xfs_dqtrace_entry(dqp, "QCHECK DQADJUST");
1681 * Adjust the inode count and the block count to reflect this inode's
1684 be64_add(&dqp->q_core.d_icount, 1);
1685 dqp->q_res_icount++;
1687 be64_add(&dqp->q_core.d_bcount, nblks);
1688 dqp->q_res_bcount += nblks;
1691 be64_add(&dqp->q_core.d_rtbcount, rtblks);
1692 dqp->q_res_rtbcount += rtblks;
1696 * Set default limits, adjust timers (since we changed usages)
1698 if (! XFS_IS_SUSER_DQUOT(dqp)) {
1699 xfs_qm_adjust_dqlimits(dqp->q_mount, &dqp->q_core);
1700 xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core);
1703 dqp->dq_flags |= XFS_DQ_DIRTY;
1709 xfs_qcnt_t *O_rtblks)
1711 xfs_filblks_t rtblks; /* total rt blks */
1712 xfs_extnum_t idx; /* extent record index */
1713 xfs_ifork_t *ifp; /* inode fork pointer */
1714 xfs_extnum_t nextents; /* number of extent entries */
1715 xfs_bmbt_rec_t *ep; /* pointer to an extent entry */
1718 ASSERT(XFS_IS_REALTIME_INODE(ip));
1719 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1720 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1721 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1725 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1726 for (idx = 0; idx < nextents; idx++) {
1727 ep = xfs_iext_get_ext(ifp, idx);
1728 rtblks += xfs_bmbt_get_blockcount(ep);
1730 *O_rtblks = (xfs_qcnt_t)rtblks;
1735 * callback routine supplied to bulkstat(). Given an inumber, find its
1736 * dquots and update them to account for resources taken by that inode.
1740 xfs_qm_dqusage_adjust(
1741 xfs_mount_t *mp, /* mount point for filesystem */
1742 xfs_ino_t ino, /* inode number to get data for */
1743 void __user *buffer, /* not used */
1744 int ubsize, /* not used */
1745 void *private_data, /* not used */
1746 xfs_daddr_t bno, /* starting block of inode cluster */
1747 int *ubused, /* not used */
1748 void *dip, /* on-disk inode pointer (not used) */
1749 int *res) /* result code value */
1752 xfs_dquot_t *udqp, *gdqp;
1753 xfs_qcnt_t nblks, rtblks;
1756 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1759 * rootino must have its resources accounted for, not so with the quota
1762 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1763 *res = BULKSTAT_RV_NOTHING;
1764 return XFS_ERROR(EINVAL);
1768 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1769 * interface expects the inode to be exclusively locked because that's
1770 * the case in all other instances. It's OK that we do this because
1771 * quotacheck is done only at mount time.
1773 if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) {
1774 *res = BULKSTAT_RV_NOTHING;
1778 if (ip->i_d.di_mode == 0) {
1779 xfs_iput_new(ip, XFS_ILOCK_EXCL);
1780 *res = BULKSTAT_RV_NOTHING;
1781 return XFS_ERROR(ENOENT);
1785 * Obtain the locked dquots. In case of an error (eg. allocation
1786 * fails for ENOSPC), we return the negative of the error number
1787 * to bulkstat, so that it can get propagated to quotacheck() and
1788 * making us disable quotas for the file system.
1790 if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) {
1791 xfs_iput(ip, XFS_ILOCK_EXCL);
1792 *res = BULKSTAT_RV_GIVEUP;
1797 if (! XFS_IS_REALTIME_INODE(ip)) {
1798 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks;
1801 * Walk thru the extent list and count the realtime blocks.
1803 if ((error = xfs_qm_get_rtblks(ip, &rtblks))) {
1804 xfs_iput(ip, XFS_ILOCK_EXCL);
1809 *res = BULKSTAT_RV_GIVEUP;
1812 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1814 ASSERT(ip->i_delayed_blks == 0);
1817 * We can't release the inode while holding its dquot locks.
1818 * The inode can go into inactive and might try to acquire the dquotlocks.
1819 * So, just unlock here and do a vn_rele at the end.
1821 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1824 * Add the (disk blocks and inode) resources occupied by this
1825 * inode to its dquots. We do this adjustment in the incore dquot,
1826 * and also copy the changes to its buffer.
1827 * We don't care about putting these changes in a transaction
1828 * envelope because if we crash in the middle of a 'quotacheck'
1829 * we have to start from the beginning anyway.
1830 * Once we're done, we'll log all the dquot bufs.
1832 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1833 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1835 if (XFS_IS_UQUOTA_ON(mp)) {
1837 xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks);
1840 if (XFS_IS_OQUOTA_ON(mp)) {
1842 xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks);
1846 * Now release the inode. This will send it to 'inactive', and
1847 * possibly even free blocks.
1849 VN_RELE(XFS_ITOV(ip));
1854 *res = BULKSTAT_RV_DIDONE;
1859 * Walk thru all the filesystem inodes and construct a consistent view
1860 * of the disk quota world. If the quotacheck fails, disable quotas.
1866 int done, count, error;
1869 xfs_inode_t *uip, *gip;
1877 ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp));
1878 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1881 * There should be no cached dquots. The (simplistic) quotacheck
1882 * algorithm doesn't like that.
1884 ASSERT(XFS_QI_MPLNDQUOTS(mp) == 0);
1886 cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname);
1889 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1890 * their counters to zero. We need a clean slate.
1891 * We don't log our changes till later.
1893 if ((uip = XFS_QI_UQIP(mp))) {
1894 if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA)))
1896 flags |= XFS_UQUOTA_CHKD;
1899 if ((gip = XFS_QI_GQIP(mp))) {
1900 if ((error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
1901 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA)))
1903 flags |= XFS_OQUOTA_CHKD;
1908 * Iterate thru all the inodes in the file system,
1909 * adjusting the corresponding dquot counters in core.
1911 if ((error = xfs_bulkstat(mp, &lastino, &count,
1912 xfs_qm_dqusage_adjust, NULL,
1913 structsz, NULL, BULKSTAT_FG_IGET, &done)))
1919 * We can get this error if we couldn't do a dquot allocation inside
1920 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1921 * dirty dquots that might be cached, we just want to get rid of them
1922 * and turn quotaoff. The dquots won't be attached to any of the inodes
1923 * at this point (because we intentionally didn't in dqget_noattach).
1926 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_QUOTAOFF);
1930 * We've made all the changes that we need to make incore.
1931 * Now flush_them down to disk buffers.
1933 xfs_qm_dqflush_all(mp, XFS_QMOPT_DELWRI);
1936 * We didn't log anything, because if we crashed, we'll have to
1937 * start the quotacheck from scratch anyway. However, we must make
1938 * sure that our dquot changes are secure before we put the
1939 * quotacheck'd stamp on the superblock. So, here we do a synchronous
1942 XFS_bflush(mp->m_ddev_targp);
1945 * If one type of quotas is off, then it will lose its
1946 * quotachecked status, since we won't be doing accounting for
1947 * that type anymore.
1949 mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
1950 mp->m_qflags |= flags;
1952 XQM_LIST_PRINT(&(XFS_QI_MPL_LIST(mp)), MPL_NEXT, "++++ Mp list +++");
1956 cmn_err(CE_WARN, "XFS quotacheck %s: Unsuccessful (Error %d): "
1957 "Disabling quotas.",
1958 mp->m_fsname, error);
1960 * We must turn off quotas.
1962 ASSERT(mp->m_quotainfo != NULL);
1963 ASSERT(xfs_Gqm != NULL);
1964 xfs_qm_destroy_quotainfo(mp);
1965 (void)xfs_mount_reset_sbqflags(mp);
1967 cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname);
1973 * This is called after the superblock has been read in and we're ready to
1974 * iget the quota inodes.
1977 xfs_qm_init_quotainos(
1980 xfs_inode_t *uip, *gip;
1985 ASSERT(mp->m_quotainfo);
1991 * Get the uquota and gquota inodes
1993 if (XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
1994 if (XFS_IS_UQUOTA_ON(mp) &&
1995 mp->m_sb.sb_uquotino != NULLFSINO) {
1996 ASSERT(mp->m_sb.sb_uquotino > 0);
1997 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1999 return XFS_ERROR(error);
2001 if (XFS_IS_OQUOTA_ON(mp) &&
2002 mp->m_sb.sb_gquotino != NULLFSINO) {
2003 ASSERT(mp->m_sb.sb_gquotino > 0);
2004 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
2007 VN_RELE(XFS_ITOV(uip));
2008 return XFS_ERROR(error);
2012 flags |= XFS_QMOPT_SBVERSION;
2013 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
2014 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
2018 * Create the two inodes, if they don't exist already. The changes
2019 * made above will get added to a transaction and logged in one of
2020 * the qino_alloc calls below. If the device is readonly,
2021 * temporarily switch to read-write to do this.
2023 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
2024 if ((error = xfs_qm_qino_alloc(mp, &uip,
2025 sbflags | XFS_SB_UQUOTINO,
2026 flags | XFS_QMOPT_UQUOTA)))
2027 return XFS_ERROR(error);
2029 flags &= ~XFS_QMOPT_SBVERSION;
2031 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
2032 flags |= (XFS_IS_GQUOTA_ON(mp) ?
2033 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
2034 error = xfs_qm_qino_alloc(mp, &gip,
2035 sbflags | XFS_SB_GQUOTINO, flags);
2038 VN_RELE(XFS_ITOV(uip));
2040 return XFS_ERROR(error);
2044 XFS_QI_UQIP(mp) = uip;
2045 XFS_QI_GQIP(mp) = gip;
2052 * Traverse the freelist of dquots and attempt to reclaim a maximum of
2053 * 'howmany' dquots. This operation races with dqlookup(), and attempts to
2054 * favor the lookup function ...
2055 * XXXsup merge this with qm_reclaim_one().
2058 xfs_qm_shake_freelist(
2063 xfs_dquot_t *dqp, *nextdqp;
2075 cmn_err(CE_DEBUG, "Shake free 0x%x", howmany);
2077 /* lock order is : hashchainlock, freelistlock, mplistlock */
2079 xfs_qm_freelist_lock(xfs_Gqm);
2081 for (dqp = xfs_Gqm->qm_dqfreelist.qh_next;
2082 ((dqp != (xfs_dquot_t *) &xfs_Gqm->qm_dqfreelist) &&
2083 nreclaimed < howmany); ) {
2087 * We are racing with dqlookup here. Naturally we don't
2088 * want to reclaim a dquot that lookup wants.
2090 if (dqp->dq_flags & XFS_DQ_WANT) {
2092 xfs_qm_freelist_unlock(xfs_Gqm);
2093 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2095 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
2100 * If the dquot is inactive, we are assured that it is
2101 * not on the mplist or the hashlist, and that makes our
2104 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
2105 ASSERT(dqp->q_mount == NULL);
2106 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
2107 ASSERT(dqp->HL_PREVP == NULL);
2108 ASSERT(dqp->MPL_PREVP == NULL);
2109 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
2110 nextdqp = dqp->dq_flnext;
2114 ASSERT(dqp->MPL_PREVP);
2116 * Try to grab the flush lock. If this dquot is in the process of
2117 * getting flushed to disk, we don't want to reclaim it.
2119 if (! xfs_qm_dqflock_nowait(dqp)) {
2121 dqp = dqp->dq_flnext;
2126 * We have the flush lock so we know that this is not in the
2127 * process of being flushed. So, if this is dirty, flush it
2128 * DELWRI so that we don't get a freelist infested with
2131 if (XFS_DQ_IS_DIRTY(dqp)) {
2132 xfs_dqtrace_entry(dqp, "DQSHAKE: DQDIRTY");
2134 * We flush it delayed write, so don't bother
2135 * releasing the mplock.
2137 (void) xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
2138 xfs_dqunlock(dqp); /* dqflush unlocks dqflock */
2139 dqp = dqp->dq_flnext;
2143 * We're trying to get the hashlock out of order. This races
2144 * with dqlookup; so, we giveup and goto the next dquot if
2145 * we couldn't get the hashlock. This way, we won't starve
2146 * a dqlookup process that holds the hashlock that is
2147 * waiting for the freelist lock.
2149 if (! xfs_qm_dqhashlock_nowait(dqp)) {
2152 dqp = dqp->dq_flnext;
2156 * This races with dquot allocation code as well as dqflush_all
2157 * and reclaim code. So, if we failed to grab the mplist lock,
2158 * giveup everything and start over.
2162 if (! xfs_qm_mplist_nowait(dqp->q_mount)) {
2163 /* XXX put a sentinel so that we can come back here */
2166 XFS_DQ_HASH_UNLOCK(hash);
2167 xfs_qm_freelist_unlock(xfs_Gqm);
2168 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2172 xfs_dqtrace_entry(dqp, "DQSHAKE: UNLINKING");
2174 cmn_err(CE_DEBUG, "Shake 0x%p, ID 0x%x\n",
2175 dqp, be32_to_cpu(dqp->q_core.d_id));
2177 ASSERT(dqp->q_nrefs == 0);
2178 nextdqp = dqp->dq_flnext;
2179 XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp);
2180 XQM_HASHLIST_REMOVE(hash, dqp);
2182 xfs_qm_mplist_unlock(dqp->q_mount);
2183 XFS_DQ_HASH_UNLOCK(hash);
2186 XQM_FREELIST_REMOVE(dqp);
2189 XQM_STATS_INC(xqmstats.xs_qm_dqshake_reclaims);
2190 xfs_qm_dqdestroy(dqp);
2193 xfs_qm_freelist_unlock(xfs_Gqm);
2199 * The kmem_shake interface is invoked when memory is running low.
2203 xfs_qm_shake(int nr_to_scan, gfp_t gfp_mask)
2205 int ndqused, nfree, n;
2207 if (!kmem_shake_allow(gfp_mask))
2212 nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */
2213 /* incore dquots in all f/s's */
2214 ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree;
2216 ASSERT(ndqused >= 0);
2218 if (nfree <= ndqused && nfree < ndquot)
2221 ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */
2222 n = nfree - ndqused - ndquot; /* # over target */
2224 return xfs_qm_shake_freelist(MAX(nfree, n));
2229 * Just pop the least recently used dquot off the freelist and
2230 * recycle it. The returned dquot is locked.
2232 STATIC xfs_dquot_t *
2233 xfs_qm_dqreclaim_one(void)
2235 xfs_dquot_t *dqpout;
2244 /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */
2246 xfs_qm_freelist_lock(xfs_Gqm);
2248 FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) {
2252 * We are racing with dqlookup here. Naturally we don't
2253 * want to reclaim a dquot that lookup wants. We release the
2254 * freelist lock and start over, so that lookup will grab
2255 * both the dquot and the freelistlock.
2257 if (dqp->dq_flags & XFS_DQ_WANT) {
2258 ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE));
2259 xfs_dqtrace_entry(dqp, "DQRECLAIM: DQWANT");
2261 xfs_qm_freelist_unlock(xfs_Gqm);
2262 if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
2264 XQM_STATS_INC(xqmstats.xs_qm_dqwants);
2269 * If the dquot is inactive, we are assured that it is
2270 * not on the mplist or the hashlist, and that makes our
2273 if (dqp->dq_flags & XFS_DQ_INACTIVE) {
2274 ASSERT(dqp->q_mount == NULL);
2275 ASSERT(! XFS_DQ_IS_DIRTY(dqp));
2276 ASSERT(dqp->HL_PREVP == NULL);
2277 ASSERT(dqp->MPL_PREVP == NULL);
2278 XQM_FREELIST_REMOVE(dqp);
2281 XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
2285 ASSERT(dqp->q_hash);
2286 ASSERT(dqp->MPL_PREVP);
2289 * Try to grab the flush lock. If this dquot is in the process of
2290 * getting flushed to disk, we don't want to reclaim it.
2292 if (! xfs_qm_dqflock_nowait(dqp)) {
2298 * We have the flush lock so we know that this is not in the
2299 * process of being flushed. So, if this is dirty, flush it
2300 * DELWRI so that we don't get a freelist infested with
2303 if (XFS_DQ_IS_DIRTY(dqp)) {
2304 xfs_dqtrace_entry(dqp, "DQRECLAIM: DQDIRTY");
2306 * We flush it delayed write, so don't bother
2307 * releasing the freelist lock.
2309 (void) xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
2310 xfs_dqunlock(dqp); /* dqflush unlocks dqflock */
2314 if (! xfs_qm_mplist_nowait(dqp->q_mount)) {
2320 if (! xfs_qm_dqhashlock_nowait(dqp))
2323 ASSERT(dqp->q_nrefs == 0);
2324 xfs_dqtrace_entry(dqp, "DQRECLAIM: UNLINKING");
2325 XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp);
2326 XQM_HASHLIST_REMOVE(dqp->q_hash, dqp);
2327 XQM_FREELIST_REMOVE(dqp);
2329 XFS_DQ_HASH_UNLOCK(dqp->q_hash);
2331 xfs_qm_mplist_unlock(dqp->q_mount);
2338 xfs_qm_freelist_unlock(xfs_Gqm);
2343 /*------------------------------------------------------------------*/
2346 * Return a new incore dquot. Depending on the number of
2347 * dquots in the system, we either allocate a new one on the kernel heap,
2348 * or reclaim a free one.
2349 * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed
2350 * to reclaim an existing one from the freelist.
2353 xfs_qm_dqalloc_incore(
2354 xfs_dquot_t **O_dqpp)
2359 * Check against high water mark to see if we want to pop
2360 * a nincompoop dquot off the freelist.
2362 if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) {
2364 * Try to recycle a dquot from the freelist.
2366 if ((dqp = xfs_qm_dqreclaim_one())) {
2367 XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
2369 * Just zero the core here. The rest will get
2370 * reinitialized by caller. XXX we shouldn't even
2373 memset(&dqp->q_core, 0, sizeof(dqp->q_core));
2377 XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
2381 * Allocate a brand new dquot on the kernel heap and return it
2382 * to the caller to initialize.
2384 ASSERT(xfs_Gqm->qm_dqzone != NULL);
2385 *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP);
2386 atomic_inc(&xfs_Gqm->qm_totaldquots);
2393 * Start a transaction and write the incore superblock changes to
2394 * disk. flags parameter indicates which fields have changed.
2397 xfs_qm_write_sb_changes(
2405 cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname);
2407 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
2408 if ((error = xfs_trans_reserve(tp, 0,
2409 mp->m_sb.sb_sectsize + 128, 0,
2411 XFS_DEFAULT_LOG_COUNT))) {
2412 xfs_trans_cancel(tp, 0);
2416 xfs_mod_sb(tp, flags);
2417 (void) xfs_trans_commit(tp, 0);
2423 /* --------------- utility functions for vnodeops ---------------- */
2427 * Given an inode, a uid and gid (from cred_t) make sure that we have
2428 * allocated relevant dquot(s) on disk, and that we won't exceed inode
2429 * quotas by creating this file.
2430 * This also attaches dquot(s) to the given inode after locking it,
2431 * and returns the dquots corresponding to the uid and/or gid.
2433 * in : inode (unlocked)
2434 * out : udquot, gdquot with references taken and unlocked
2444 xfs_dquot_t **O_udqpp,
2445 xfs_dquot_t **O_gdqpp)
2448 xfs_dquot_t *uq, *gq;
2451 if (!XFS_IS_QUOTA_ON(mp))
2454 lockflags = XFS_ILOCK_EXCL;
2455 xfs_ilock(ip, lockflags);
2457 if ((flags & XFS_QMOPT_INHERIT) &&
2458 XFS_INHERIT_GID(ip, XFS_MTOVFS(mp)))
2459 gid = ip->i_d.di_gid;
2462 * Attach the dquot(s) to this inode, doing a dquot allocation
2463 * if necessary. The dquot(s) will not be locked.
2465 if (XFS_NOT_DQATTACHED(mp, ip)) {
2466 if ((error = xfs_qm_dqattach(ip, XFS_QMOPT_DQALLOC |
2467 XFS_QMOPT_ILOCKED))) {
2468 xfs_iunlock(ip, lockflags);
2474 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
2475 if (ip->i_d.di_uid != uid) {
2477 * What we need is the dquot that has this uid, and
2478 * if we send the inode to dqget, the uid of the inode
2479 * takes priority over what's sent in the uid argument.
2480 * We must unlock inode here before calling dqget if
2481 * we're not sending the inode, because otherwise
2482 * we'll deadlock by doing trans_reserve while
2485 xfs_iunlock(ip, lockflags);
2486 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
2491 ASSERT(error != ENOENT);
2495 * Get the ilock in the right order.
2498 lockflags = XFS_ILOCK_SHARED;
2499 xfs_ilock(ip, lockflags);
2502 * Take an extra reference, because we'll return
2505 ASSERT(ip->i_udquot);
2512 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
2513 if (ip->i_d.di_gid != gid) {
2514 xfs_iunlock(ip, lockflags);
2515 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
2522 ASSERT(error != ENOENT);
2526 lockflags = XFS_ILOCK_SHARED;
2527 xfs_ilock(ip, lockflags);
2529 ASSERT(ip->i_gdquot);
2535 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
2536 if (ip->i_d.di_projid != prid) {
2537 xfs_iunlock(ip, lockflags);
2538 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
2545 ASSERT(error != ENOENT);
2549 lockflags = XFS_ILOCK_SHARED;
2550 xfs_ilock(ip, lockflags);
2552 ASSERT(ip->i_gdquot);
2560 xfs_dqtrace_entry_ino(uq, "DQALLOC", ip);
2562 xfs_iunlock(ip, lockflags);
2575 * Actually transfer ownership, and do dquot modifications.
2576 * These were already reserved.
2582 xfs_dquot_t **IO_olddq,
2585 xfs_dquot_t *prevdq;
2586 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
2587 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
2589 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
2590 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
2595 ASSERT(prevdq != newdq);
2597 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
2598 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
2600 /* the sparkling new dquot */
2601 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
2602 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
2605 * Take an extra reference, because the inode
2606 * is going to keep this dquot pointer even
2607 * after the trans_commit.
2611 xfs_dqunlock(newdq);
2618 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
2621 xfs_qm_vop_chown_reserve(
2630 uint delblks, blkflags, prjflags = 0;
2631 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
2633 ASSERT(XFS_ISLOCKED_INODE(ip));
2635 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
2637 delblks = ip->i_delayed_blks;
2638 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
2639 blkflags = XFS_IS_REALTIME_INODE(ip) ?
2640 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
2642 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
2643 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
2646 * If there are delayed allocation blocks, then we have to
2647 * unreserve those from the old dquot, and add them to the
2651 ASSERT(ip->i_udquot);
2652 unresudq = ip->i_udquot;
2655 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
2656 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
2657 ip->i_d.di_projid != be32_to_cpu(gdqp->q_core.d_id))
2658 prjflags = XFS_QMOPT_ENOSPC;
2661 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
2662 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
2665 ASSERT(ip->i_gdquot);
2666 unresgdq = ip->i_gdquot;
2671 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
2672 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
2673 flags | blkflags | prjflags)))
2677 * Do the delayed blks reservations/unreservations now. Since, these
2678 * are done without the help of a transaction, if a reservation fails
2679 * its previous reservations won't be automatically undone by trans
2680 * code. So, we have to do it manually here.
2684 * Do the reservations first. Unreservation can't fail.
2686 ASSERT(delblksudq || delblksgdq);
2687 ASSERT(unresudq || unresgdq);
2688 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2689 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
2690 flags | blkflags | prjflags)))
2692 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
2693 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
2701 xfs_qm_vop_rename_dqattach(
2702 xfs_inode_t **i_tab)
2710 if (! XFS_IS_QUOTA_ON(ip->i_mount))
2713 if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) {
2714 error = xfs_qm_dqattach(ip, 0);
2718 for (i = 1; (i < 4 && i_tab[i]); i++) {
2720 * Watch out for duplicate entries in the table.
2722 if ((ip = i_tab[i]) != i_tab[i-1]) {
2723 if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) {
2724 error = xfs_qm_dqattach(ip, 0);
2734 xfs_qm_vop_dqattach_and_dqmod_newinode(
2740 if (!XFS_IS_QUOTA_ON(tp->t_mountp))
2743 ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
2744 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
2750 ASSERT(ip->i_udquot == NULL);
2751 ip->i_udquot = udqp;
2752 ASSERT(XFS_IS_UQUOTA_ON(tp->t_mountp));
2753 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
2754 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
2760 ASSERT(ip->i_gdquot == NULL);
2761 ip->i_gdquot = gdqp;
2762 ASSERT(XFS_IS_OQUOTA_ON(tp->t_mountp));
2763 ASSERT((XFS_IS_GQUOTA_ON(tp->t_mountp) ?
2764 ip->i_d.di_gid : ip->i_d.di_projid) ==
2765 be32_to_cpu(gdqp->q_core.d_id));
2766 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
2770 /* ------------- list stuff -----------------*/
2772 xfs_qm_freelist_init(xfs_frlist_t *ql)
2774 ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql;
2775 mutex_init(&ql->qh_lock);
2781 xfs_qm_freelist_destroy(xfs_frlist_t *ql)
2783 xfs_dquot_t *dqp, *nextdqp;
2785 mutex_lock(&ql->qh_lock);
2786 for (dqp = ql->qh_next;
2787 dqp != (xfs_dquot_t *)ql; ) {
2789 nextdqp = dqp->dq_flnext;
2791 cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp);
2793 XQM_FREELIST_REMOVE(dqp);
2795 xfs_qm_dqdestroy(dqp);
2798 mutex_unlock(&ql->qh_lock);
2799 mutex_destroy(&ql->qh_lock);
2801 ASSERT(ql->qh_nelems == 0);
2805 xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq)
2807 dq->dq_flnext = ql->qh_next;
2808 dq->dq_flprev = (xfs_dquot_t *)ql;
2810 dq->dq_flnext->dq_flprev = dq;
2811 xfs_Gqm->qm_dqfreelist.qh_nelems++;
2812 xfs_Gqm->qm_dqfreelist.qh_version++;
2816 xfs_qm_freelist_unlink(xfs_dquot_t *dq)
2818 xfs_dquot_t *next = dq->dq_flnext;
2819 xfs_dquot_t *prev = dq->dq_flprev;
2821 next->dq_flprev = prev;
2822 prev->dq_flnext = next;
2823 dq->dq_flnext = dq->dq_flprev = dq;
2824 xfs_Gqm->qm_dqfreelist.qh_nelems--;
2825 xfs_Gqm->qm_dqfreelist.qh_version++;
2829 xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq)
2831 xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq);
2835 xfs_qm_dqhashlock_nowait(
2840 locked = mutex_trylock(&((dqp)->q_hash->qh_lock));
2845 xfs_qm_freelist_lock_nowait(
2850 locked = mutex_trylock(&(xqm->qm_dqfreelist.qh_lock));
2855 xfs_qm_mplist_nowait(
2860 ASSERT(mp->m_quotainfo);
2861 locked = mutex_trylock(&(XFS_QI_MPLLOCK(mp)));