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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott4ce31212005-11-02 14:59:41 +11002 * Copyright (c) 2000-2003 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott4ce31212005-11-02 14:59:41 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott4ce31212005-11-02 14:59:41 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott4ce31212005-11-02 14:59:41 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
19#include "xfs_fs.h"
Dave Chinner6ca1c902013-08-12 20:49:26 +100020#include "xfs_format.h"
Dave Chinner239880e2013-10-23 10:50:10 +110021#include "xfs_log_format.h"
Dave Chinner70a9883c2013-10-23 10:36:05 +110022#include "xfs_shared.h"
Dave Chinner239880e2013-10-23 10:50:10 +110023#include "xfs_trans_resv.h"
Nathan Scotta844f452005-11-02 14:38:42 +110024#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_mount.h"
Darrick J. Wong3ab78df2016-08-03 11:15:38 +100026#include "xfs_defer.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_inode.h"
28#include "xfs_bmap.h"
Dave Chinner68988112013-08-12 20:49:42 +100029#include "xfs_bmap_util.h"
Dave Chinner239880e2013-10-23 10:50:10 +110030#include "xfs_alloc.h"
31#include "xfs_quota.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_error.h"
Dave Chinner239880e2013-10-23 10:50:10 +110033#include "xfs_trans.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_buf_item.h"
35#include "xfs_trans_space.h"
36#include "xfs_trans_priv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include "xfs_qm.h"
Christoph Hellwig3fe58f32013-04-03 16:11:16 +110038#include "xfs_cksum.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000039#include "xfs_trace.h"
Dave Chinner239880e2013-10-23 10:50:10 +110040#include "xfs_log.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110041#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Linus Torvalds1da177e2005-04-16 15:20:36 -070043/*
Christoph Hellwigbf72de32011-12-06 21:58:19 +000044 * Lock order:
45 *
46 * ip->i_lock
Christoph Hellwig9f920f12012-03-13 08:52:35 +000047 * qi->qi_tree_lock
Christoph Hellwigb84a3a92012-03-14 11:53:34 -050048 * dquot->q_qlock (xfs_dqlock() and friends)
49 * dquot->q_flush (xfs_dqflock() and friends)
50 * qi->qi_lru_lock
Christoph Hellwigbf72de32011-12-06 21:58:19 +000051 *
52 * If two dquots need to be locked the order is user before group/project,
53 * otherwise by the lowest id first, see xfs_dqlock2.
54 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#ifdef DEBUG
57xfs_buftarg_t *xfs_dqerror_target;
58int xfs_do_dqerror;
59int xfs_dqreq_num;
60int xfs_dqerror_mod = 33;
61#endif
62
Christoph Hellwiga05931c2012-03-13 08:52:37 +000063struct kmem_zone *xfs_qm_dqtrxzone;
64static struct kmem_zone *xfs_qm_dqzone;
65
Dave Chinnerf112a042013-09-30 09:37:03 +100066static struct lock_class_key xfs_dquot_group_class;
67static struct lock_class_key xfs_dquot_project_class;
Christoph Hellwig98b8c7a2009-01-19 02:03:25 +010068
Linus Torvalds1da177e2005-04-16 15:20:36 -070069/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 * This is called to free all the memory associated with a dquot
71 */
72void
73xfs_qm_dqdestroy(
74 xfs_dquot_t *dqp)
75{
Christoph Hellwigf8739c32012-03-13 08:52:34 +000076 ASSERT(list_empty(&dqp->q_lru));
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Dave Chinnerb1c5ebb2016-07-22 09:52:35 +100078 kmem_free(dqp->q_logitem.qli_item.li_lv_shadow);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 mutex_destroy(&dqp->q_qlock);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000080
Bill O'Donnellff6d6af2015-10-12 18:21:22 +110081 XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot);
82 kmem_zone_free(xfs_qm_dqzone, dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083}
84
85/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 * If default limits are in force, push them into the dquot now.
87 * We overwrite the dquot limits only if they are zero and this
88 * is not the root dquot.
89 */
90void
91xfs_qm_adjust_dqlimits(
Brian Foster4b6eae2e2013-03-18 10:51:45 -040092 struct xfs_mount *mp,
93 struct xfs_dquot *dq)
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
Brian Foster4b6eae2e2013-03-18 10:51:45 -040095 struct xfs_quotainfo *q = mp->m_quotainfo;
96 struct xfs_disk_dquot *d = &dq->q_core;
Carlos Maiolinobe607942016-02-08 11:27:55 +110097 struct xfs_def_quota *defq;
Brian Fosterb1366452013-03-18 10:51:46 -040098 int prealloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100 ASSERT(d->d_id);
Carlos Maiolinobe607942016-02-08 11:27:55 +1100101 defq = xfs_get_defquota(dq, q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Carlos Maiolinobe607942016-02-08 11:27:55 +1100103 if (defq->bsoftlimit && !d->d_blk_softlimit) {
104 d->d_blk_softlimit = cpu_to_be64(defq->bsoftlimit);
Brian Fosterb1366452013-03-18 10:51:46 -0400105 prealloc = 1;
106 }
Carlos Maiolinobe607942016-02-08 11:27:55 +1100107 if (defq->bhardlimit && !d->d_blk_hardlimit) {
108 d->d_blk_hardlimit = cpu_to_be64(defq->bhardlimit);
Brian Fosterb1366452013-03-18 10:51:46 -0400109 prealloc = 1;
110 }
Carlos Maiolinobe607942016-02-08 11:27:55 +1100111 if (defq->isoftlimit && !d->d_ino_softlimit)
112 d->d_ino_softlimit = cpu_to_be64(defq->isoftlimit);
113 if (defq->ihardlimit && !d->d_ino_hardlimit)
114 d->d_ino_hardlimit = cpu_to_be64(defq->ihardlimit);
115 if (defq->rtbsoftlimit && !d->d_rtb_softlimit)
116 d->d_rtb_softlimit = cpu_to_be64(defq->rtbsoftlimit);
117 if (defq->rtbhardlimit && !d->d_rtb_hardlimit)
118 d->d_rtb_hardlimit = cpu_to_be64(defq->rtbhardlimit);
Brian Fosterb1366452013-03-18 10:51:46 -0400119
120 if (prealloc)
121 xfs_dquot_set_prealloc_limits(dq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122}
123
124/*
125 * Check the limits and timers of a dquot and start or reset timers
126 * if necessary.
127 * This gets called even when quota enforcement is OFF, which makes our
128 * life a little less complicated. (We just don't reject any quota
129 * reservations in that case, when enforcement is off).
130 * We also return 0 as the values of the timers in Q_GETQUOTA calls, when
131 * enforcement's off.
132 * In contrast, warnings are a little different in that they don't
Nathan Scott754002b2005-06-21 15:49:06 +1000133 * 'automatically' get started when limits get exceeded. They do
134 * get reset to zero, however, when we find the count to be under
135 * the soft limit (they are only ever set non-zero via userspace).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 */
137void
138xfs_qm_adjust_dqtimers(
139 xfs_mount_t *mp,
140 xfs_disk_dquot_t *d)
141{
142 ASSERT(d->d_id);
143
Christoph Hellwigea15ab32011-07-13 13:43:50 +0200144#ifdef DEBUG
Christoph Hellwig1149d962005-11-02 15:01:12 +1100145 if (d->d_blk_hardlimit)
146 ASSERT(be64_to_cpu(d->d_blk_softlimit) <=
147 be64_to_cpu(d->d_blk_hardlimit));
148 if (d->d_ino_hardlimit)
149 ASSERT(be64_to_cpu(d->d_ino_softlimit) <=
150 be64_to_cpu(d->d_ino_hardlimit));
151 if (d->d_rtb_hardlimit)
152 ASSERT(be64_to_cpu(d->d_rtb_softlimit) <=
153 be64_to_cpu(d->d_rtb_hardlimit));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154#endif
Christoph Hellwigea15ab32011-07-13 13:43:50 +0200155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 if (!d->d_btimer) {
Christoph Hellwig1149d962005-11-02 15:01:12 +1100157 if ((d->d_blk_softlimit &&
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000158 (be64_to_cpu(d->d_bcount) >
Christoph Hellwig1149d962005-11-02 15:01:12 +1100159 be64_to_cpu(d->d_blk_softlimit))) ||
160 (d->d_blk_hardlimit &&
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000161 (be64_to_cpu(d->d_bcount) >
Christoph Hellwig1149d962005-11-02 15:01:12 +1100162 be64_to_cpu(d->d_blk_hardlimit)))) {
163 d->d_btimer = cpu_to_be32(get_seconds() +
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000164 mp->m_quotainfo->qi_btimelimit);
Nathan Scott754002b2005-06-21 15:49:06 +1000165 } else {
166 d->d_bwarns = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 }
168 } else {
169 if ((!d->d_blk_softlimit ||
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000170 (be64_to_cpu(d->d_bcount) <=
Christoph Hellwig1149d962005-11-02 15:01:12 +1100171 be64_to_cpu(d->d_blk_softlimit))) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 (!d->d_blk_hardlimit ||
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000173 (be64_to_cpu(d->d_bcount) <=
Christoph Hellwig1149d962005-11-02 15:01:12 +1100174 be64_to_cpu(d->d_blk_hardlimit)))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 d->d_btimer = 0;
176 }
177 }
178
179 if (!d->d_itimer) {
Christoph Hellwig1149d962005-11-02 15:01:12 +1100180 if ((d->d_ino_softlimit &&
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000181 (be64_to_cpu(d->d_icount) >
Christoph Hellwig1149d962005-11-02 15:01:12 +1100182 be64_to_cpu(d->d_ino_softlimit))) ||
183 (d->d_ino_hardlimit &&
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000184 (be64_to_cpu(d->d_icount) >
Christoph Hellwig1149d962005-11-02 15:01:12 +1100185 be64_to_cpu(d->d_ino_hardlimit)))) {
186 d->d_itimer = cpu_to_be32(get_seconds() +
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000187 mp->m_quotainfo->qi_itimelimit);
Nathan Scott754002b2005-06-21 15:49:06 +1000188 } else {
189 d->d_iwarns = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 }
191 } else {
192 if ((!d->d_ino_softlimit ||
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000193 (be64_to_cpu(d->d_icount) <=
Christoph Hellwig1149d962005-11-02 15:01:12 +1100194 be64_to_cpu(d->d_ino_softlimit))) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 (!d->d_ino_hardlimit ||
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000196 (be64_to_cpu(d->d_icount) <=
Christoph Hellwig1149d962005-11-02 15:01:12 +1100197 be64_to_cpu(d->d_ino_hardlimit)))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 d->d_itimer = 0;
199 }
200 }
201
202 if (!d->d_rtbtimer) {
Christoph Hellwig1149d962005-11-02 15:01:12 +1100203 if ((d->d_rtb_softlimit &&
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000204 (be64_to_cpu(d->d_rtbcount) >
Christoph Hellwig1149d962005-11-02 15:01:12 +1100205 be64_to_cpu(d->d_rtb_softlimit))) ||
206 (d->d_rtb_hardlimit &&
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000207 (be64_to_cpu(d->d_rtbcount) >
Christoph Hellwig1149d962005-11-02 15:01:12 +1100208 be64_to_cpu(d->d_rtb_hardlimit)))) {
209 d->d_rtbtimer = cpu_to_be32(get_seconds() +
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000210 mp->m_quotainfo->qi_rtbtimelimit);
Nathan Scott754002b2005-06-21 15:49:06 +1000211 } else {
212 d->d_rtbwarns = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 }
214 } else {
215 if ((!d->d_rtb_softlimit ||
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000216 (be64_to_cpu(d->d_rtbcount) <=
Christoph Hellwig1149d962005-11-02 15:01:12 +1100217 be64_to_cpu(d->d_rtb_softlimit))) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 (!d->d_rtb_hardlimit ||
Mitsuo Hayasakad0a3fe62012-02-06 12:50:07 +0000219 (be64_to_cpu(d->d_rtbcount) <=
Christoph Hellwig1149d962005-11-02 15:01:12 +1100220 be64_to_cpu(d->d_rtb_hardlimit)))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 d->d_rtbtimer = 0;
222 }
223 }
224}
225
226/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 * initialize a buffer full of dquots and log the whole thing
228 */
229STATIC void
230xfs_qm_init_dquot_blk(
231 xfs_trans_t *tp,
232 xfs_mount_t *mp,
233 xfs_dqid_t id,
234 uint type,
235 xfs_buf_t *bp)
236{
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000237 struct xfs_quotainfo *q = mp->m_quotainfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 xfs_dqblk_t *d;
Eric Sandeena484bcd2016-02-08 11:22:58 +1100239 xfs_dqid_t curid;
240 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
242 ASSERT(tp);
Christoph Hellwig0c842ad2011-07-08 14:36:19 +0200243 ASSERT(xfs_buf_islocked(bp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Chandra Seetharaman62926042011-07-22 23:40:15 +0000245 d = bp->b_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 /*
248 * ID of the first dquot in the block - id's are zero based.
249 */
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000250 curid = id - (id % q->qi_dqperchunk);
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000251 memset(d, 0, BBTOB(q->qi_dqchunklen));
Christoph Hellwig49d35a52011-12-06 21:58:23 +0000252 for (i = 0; i < q->qi_dqperchunk; i++, d++, curid++) {
253 d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
254 d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
255 d->dd_diskdq.d_id = cpu_to_be32(curid);
256 d->dd_diskdq.d_flags = type;
Dave Chinner6fcdc592013-06-03 15:28:46 +1000257 if (xfs_sb_version_hascrc(&mp->m_sb)) {
Dave Chinner92863452015-08-19 10:32:01 +1000258 uuid_copy(&d->dd_uuid, &mp->m_sb.sb_meta_uuid);
Dave Chinner6fcdc592013-06-03 15:28:46 +1000259 xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk),
260 XFS_DQUOT_CRC_OFF);
261 }
Christoph Hellwig49d35a52011-12-06 21:58:23 +0000262 }
263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 xfs_trans_dquot_buf(tp, bp,
Dave Chinnerc1155412010-05-07 11:05:19 +1000265 (type & XFS_DQ_USER ? XFS_BLF_UDQUOT_BUF :
266 ((type & XFS_DQ_PROJ) ? XFS_BLF_PDQUOT_BUF :
267 XFS_BLF_GDQUOT_BUF)));
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000268 xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269}
270
Brian Fosterb1366452013-03-18 10:51:46 -0400271/*
272 * Initialize the dynamic speculative preallocation thresholds. The lo/hi
273 * watermarks correspond to the soft and hard limits by default. If a soft limit
274 * is not specified, we use 95% of the hard limit.
275 */
276void
277xfs_dquot_set_prealloc_limits(struct xfs_dquot *dqp)
278{
279 __uint64_t space;
280
281 dqp->q_prealloc_hi_wmark = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
282 dqp->q_prealloc_lo_wmark = be64_to_cpu(dqp->q_core.d_blk_softlimit);
283 if (!dqp->q_prealloc_lo_wmark) {
284 dqp->q_prealloc_lo_wmark = dqp->q_prealloc_hi_wmark;
285 do_div(dqp->q_prealloc_lo_wmark, 100);
286 dqp->q_prealloc_lo_wmark *= 95;
287 }
288
289 space = dqp->q_prealloc_hi_wmark;
290
291 do_div(space, 100);
292 dqp->q_low_space[XFS_QLOWSP_1_PCNT] = space;
293 dqp->q_low_space[XFS_QLOWSP_3_PCNT] = space * 3;
294 dqp->q_low_space[XFS_QLOWSP_5_PCNT] = space * 5;
295}
296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297/*
298 * Allocate a block and fill it with dquots.
299 * This is called when the bmapi finds a hole.
300 */
301STATIC int
302xfs_qm_dqalloc(
Tim Shimminefa092f2005-09-05 08:29:01 +1000303 xfs_trans_t **tpp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 xfs_mount_t *mp,
305 xfs_dquot_t *dqp,
306 xfs_inode_t *quotip,
307 xfs_fileoff_t offset_fsb,
308 xfs_buf_t **O_bpp)
309{
310 xfs_fsblock_t firstblock;
Darrick J. Wong2c3234d2016-08-03 11:19:29 +1000311 struct xfs_defer_ops dfops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 xfs_bmbt_irec_t map;
Eric Sandeenf6106ef2016-01-11 11:34:01 +1100313 int nmaps, error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 xfs_buf_t *bp;
Tim Shimminefa092f2005-09-05 08:29:01 +1000315 xfs_trans_t *tp = *tpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317 ASSERT(tp != NULL);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000318
319 trace_xfs_dqalloc(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321 /*
322 * Initialize the bmap freelist prior to calling bmapi code.
323 */
Darrick J. Wong2c3234d2016-08-03 11:19:29 +1000324 xfs_defer_init(&dfops, &firstblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 xfs_ilock(quotip, XFS_ILOCK_EXCL);
326 /*
327 * Return if this type of quotas is turned off while we didn't
328 * have an inode lock
329 */
Chandra Seetharaman6967b962012-01-23 17:31:25 +0000330 if (!xfs_this_quota_on(dqp->q_mount, dqp->dq_flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 xfs_iunlock(quotip, XFS_ILOCK_EXCL);
Dave Chinner24513372014-06-25 14:58:08 +1000332 return -ESRCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 }
334
Christoph Hellwigddc34152011-09-19 15:00:54 +0000335 xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 nmaps = 1;
Dave Chinnerc0dc7822011-09-18 20:40:52 +0000337 error = xfs_bmapi_write(tp, quotip, offset_fsb,
338 XFS_DQUOT_CLUSTER_SIZE_FSB, XFS_BMAPI_METADATA,
339 &firstblock, XFS_QM_DQALLOC_SPACE_RES(mp),
Darrick J. Wong2c3234d2016-08-03 11:19:29 +1000340 &map, &nmaps, &dfops);
Dave Chinnerc0dc7822011-09-18 20:40:52 +0000341 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB);
344 ASSERT(nmaps == 1);
345 ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
346 (map.br_startblock != HOLESTARTBLOCK));
347
348 /*
349 * Keep track of the blkno to save a lookup later
350 */
351 dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
352
353 /* now we can just get the buffer (there's nothing to read yet) */
354 bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
355 dqp->q_blkno,
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000356 mp->m_quotainfo->qi_dqchunklen,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 0);
Dave Chinner36de9552014-06-06 16:02:12 +1000358 if (!bp) {
Dave Chinner24513372014-06-25 14:58:08 +1000359 error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 goto error1;
Dave Chinner36de9552014-06-06 16:02:12 +1000361 }
Dave Chinner1813dd62012-11-14 17:54:40 +1100362 bp->b_ops = &xfs_dquot_buf_ops;
Chandra Seetharaman2a30f36d2011-09-20 13:56:55 +0000363
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 /*
365 * Make a chunk of dquots out of this buffer and log
366 * the entire thing.
367 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100368 xfs_qm_init_dquot_blk(tp, mp, be32_to_cpu(dqp->q_core.d_id),
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000369 dqp->dq_flags & XFS_DQ_ALLTYPES, bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
Tim Shimminefa092f2005-09-05 08:29:01 +1000371 /*
Darrick J. Wong310a75a2016-08-03 11:18:10 +1000372 * xfs_defer_finish() may commit the current transaction and
Tim Shimminefa092f2005-09-05 08:29:01 +1000373 * start a second transaction if the freelist is not empty.
374 *
375 * Since we still want to modify this buffer, we need to
376 * ensure that the buffer is not released on commit of
377 * the first transaction and ensure the buffer is added to the
378 * second transaction.
379 *
380 * If there is only one transaction then don't stop the buffer
381 * from being released when it commits later on.
382 */
383
384 xfs_trans_bhold(tp, bp);
385
Darrick J. Wong2c3234d2016-08-03 11:19:29 +1000386 error = xfs_defer_finish(tpp, &dfops, NULL);
Eric Sandeenf6106ef2016-01-11 11:34:01 +1100387 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 goto error1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Eric Sandeenf6106ef2016-01-11 11:34:01 +1100390 /* Transaction was committed? */
391 if (*tpp != tp) {
Tim Shimminefa092f2005-09-05 08:29:01 +1000392 tp = *tpp;
393 xfs_trans_bjoin(tp, bp);
394 } else {
395 xfs_trans_bhold_release(tp, bp);
396 }
397
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 *O_bpp = bp;
399 return 0;
400
Eric Sandeenf6106ef2016-01-11 11:34:01 +1100401error1:
Darrick J. Wong2c3234d2016-08-03 11:19:29 +1000402 xfs_defer_cancel(&dfops);
Eric Sandeenf6106ef2016-01-11 11:34:01 +1100403error0:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 xfs_iunlock(quotip, XFS_ILOCK_EXCL);
405
Eric Sandeend99831f2014-06-22 15:03:54 +1000406 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407}
Dave Chinner9aede1d2013-10-15 09:17:52 +1100408
Dave Chinnerc6319192012-11-14 17:50:13 +1100409STATIC int
410xfs_qm_dqrepair(
411 struct xfs_mount *mp,
412 struct xfs_trans *tp,
413 struct xfs_dquot *dqp,
414 xfs_dqid_t firstid,
415 struct xfs_buf **bpp)
416{
417 int error;
418 struct xfs_disk_dquot *ddq;
419 struct xfs_dqblk *d;
420 int i;
421
422 /*
423 * Read the buffer without verification so we get the corrupted
Dave Chinner612cfbf2012-11-14 17:52:32 +1100424 * buffer returned to us. make sure we verify it on write, though.
Dave Chinnerc6319192012-11-14 17:50:13 +1100425 */
426 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, dqp->q_blkno,
427 mp->m_quotainfo->qi_dqchunklen,
428 0, bpp, NULL);
429
430 if (error) {
431 ASSERT(*bpp == NULL);
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000432 return error;
Dave Chinnerc6319192012-11-14 17:50:13 +1100433 }
Dave Chinner1813dd62012-11-14 17:54:40 +1100434 (*bpp)->b_ops = &xfs_dquot_buf_ops;
Dave Chinnerc6319192012-11-14 17:50:13 +1100435
436 ASSERT(xfs_buf_islocked(*bpp));
437 d = (struct xfs_dqblk *)(*bpp)->b_addr;
438
439 /* Do the actual repair of dquots in this buffer */
440 for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) {
441 ddq = &d[i].dd_diskdq;
Dave Chinner9aede1d2013-10-15 09:17:52 +1100442 error = xfs_dqcheck(mp, ddq, firstid + i,
Dave Chinnerc6319192012-11-14 17:50:13 +1100443 dqp->dq_flags & XFS_DQ_ALLTYPES,
444 XFS_QMOPT_DQREPAIR, "xfs_qm_dqrepair");
445 if (error) {
446 /* repair failed, we're screwed */
447 xfs_trans_brelse(tp, *bpp);
Dave Chinner24513372014-06-25 14:58:08 +1000448 return -EIO;
Dave Chinnerc6319192012-11-14 17:50:13 +1100449 }
450 }
451
452 return 0;
453}
454
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455/*
456 * Maps a dquot to the buffer containing its on-disk version.
457 * This returns a ptr to the buffer containing the on-disk dquot
458 * in the bpp param, and a ptr to the on-disk dquot within that buffer
459 */
460STATIC int
461xfs_qm_dqtobp(
Tim Shimminefa092f2005-09-05 08:29:01 +1000462 xfs_trans_t **tpp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 xfs_dquot_t *dqp,
464 xfs_disk_dquot_t **O_ddpp,
465 xfs_buf_t **O_bpp,
466 uint flags)
467{
Chandra Seetharaman113a5682013-06-27 17:25:07 -0500468 struct xfs_bmbt_irec map;
469 int nmaps = 1, error;
470 struct xfs_buf *bp;
Eric Sandeen4d4d9522016-02-08 11:23:23 +1100471 struct xfs_inode *quotip;
Chandra Seetharaman113a5682013-06-27 17:25:07 -0500472 struct xfs_mount *mp = dqp->q_mount;
473 xfs_dqid_t id = be32_to_cpu(dqp->q_core.d_id);
474 struct xfs_trans *tp = (tpp ? *tpp : NULL);
Christoph Hellwigf4df8ad2013-12-06 12:30:13 -0800475 uint lock_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
Eric Sandeen4d4d9522016-02-08 11:23:23 +1100477 quotip = xfs_quota_inode(dqp->q_mount, dqp->dq_flags);
Christoph Hellwigacecf1b2010-09-06 01:44:45 +0000478 dqp->q_fileoffset = (xfs_fileoff_t)id / mp->m_quotainfo->qi_dqperchunk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Christoph Hellwigf4df8ad2013-12-06 12:30:13 -0800480 lock_mode = xfs_ilock_data_map_shared(quotip);
Chandra Seetharaman6967b962012-01-23 17:31:25 +0000481 if (!xfs_this_quota_on(dqp->q_mount, dqp->dq_flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 /*
Christoph Hellwigacecf1b2010-09-06 01:44:45 +0000483 * Return if this type of quotas is turned off while we
484 * didn't have the quota inode lock.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 */
Christoph Hellwigf4df8ad2013-12-06 12:30:13 -0800486 xfs_iunlock(quotip, lock_mode);
Dave Chinner24513372014-06-25 14:58:08 +1000487 return -ESRCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
490 /*
Christoph Hellwigacecf1b2010-09-06 01:44:45 +0000491 * Find the block map; no allocations yet
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 */
Dave Chinner5c8ed202011-09-18 20:40:45 +0000493 error = xfs_bmapi_read(quotip, dqp->q_fileoffset,
494 XFS_DQUOT_CLUSTER_SIZE_FSB, &map, &nmaps, 0);
Christoph Hellwigacecf1b2010-09-06 01:44:45 +0000495
Christoph Hellwigf4df8ad2013-12-06 12:30:13 -0800496 xfs_iunlock(quotip, lock_mode);
Christoph Hellwigacecf1b2010-09-06 01:44:45 +0000497 if (error)
498 return error;
499
500 ASSERT(nmaps == 1);
501 ASSERT(map.br_blockcount == 1);
502
503 /*
504 * Offset of dquot in the (fixed sized) dquot chunk.
505 */
506 dqp->q_bufoffset = (id % mp->m_quotainfo->qi_dqperchunk) *
507 sizeof(xfs_dqblk_t);
508
509 ASSERT(map.br_startblock != DELAYSTARTBLOCK);
510 if (map.br_startblock == HOLESTARTBLOCK) {
511 /*
512 * We don't allocate unless we're asked to
513 */
514 if (!(flags & XFS_QMOPT_DQALLOC))
Dave Chinner24513372014-06-25 14:58:08 +1000515 return -ENOENT;
Christoph Hellwigacecf1b2010-09-06 01:44:45 +0000516
517 ASSERT(tp);
518 error = xfs_qm_dqalloc(tpp, mp, dqp, quotip,
519 dqp->q_fileoffset, &bp);
520 if (error)
521 return error;
522 tp = *tpp;
523 } else {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000524 trace_xfs_dqtobp_read(dqp);
525
Christoph Hellwigacecf1b2010-09-06 01:44:45 +0000526 /*
527 * store the blkno etc so that we don't have to do the
528 * mapping all the time
529 */
530 dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
531
Christoph Hellwig8a7b8a82010-04-20 17:01:30 +1000532 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
533 dqp->q_blkno,
534 mp->m_quotainfo->qi_dqchunklen,
Dave Chinner1813dd62012-11-14 17:54:40 +1100535 0, &bp, &xfs_dquot_buf_ops);
Dave Chinnerc6319192012-11-14 17:50:13 +1100536
Dave Chinner24513372014-06-25 14:58:08 +1000537 if (error == -EFSCORRUPTED && (flags & XFS_QMOPT_DQREPAIR)) {
Dave Chinnerc6319192012-11-14 17:50:13 +1100538 xfs_dqid_t firstid = (xfs_dqid_t)map.br_startoff *
539 mp->m_quotainfo->qi_dqperchunk;
540 ASSERT(bp == NULL);
541 error = xfs_qm_dqrepair(mp, tp, dqp, firstid, &bp);
542 }
543
544 if (error) {
545 ASSERT(bp == NULL);
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000546 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 }
549
Dave Chinnerc6319192012-11-14 17:50:13 +1100550 ASSERT(xfs_buf_islocked(bp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 *O_bpp = bp;
Dave Chinnerc6319192012-11-14 17:50:13 +1100552 *O_ddpp = bp->b_addr + dqp->q_bufoffset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Eric Sandeend99831f2014-06-22 15:03:54 +1000554 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555}
556
557
558/*
559 * Read in the ondisk dquot using dqtobp() then copy it to an incore version,
560 * and release the buffer immediately.
561 *
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000562 * If XFS_QMOPT_DQALLOC is set, allocate a dquot on disk if it needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 */
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000564int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565xfs_qm_dqread(
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000566 struct xfs_mount *mp,
567 xfs_dqid_t id,
568 uint type,
569 uint flags,
570 struct xfs_dquot **O_dqpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571{
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000572 struct xfs_dquot *dqp;
573 struct xfs_disk_dquot *ddqp;
574 struct xfs_buf *bp;
575 struct xfs_trans *tp = NULL;
576 int error;
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +0000577
Christoph Hellwiga05931c2012-03-13 08:52:37 +0000578 dqp = kmem_zone_zalloc(xfs_qm_dqzone, KM_SLEEP);
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +0000579
580 dqp->dq_flags = type;
581 dqp->q_core.d_id = cpu_to_be32(id);
582 dqp->q_mount = mp;
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000583 INIT_LIST_HEAD(&dqp->q_lru);
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +0000584 mutex_init(&dqp->q_qlock);
585 init_waitqueue_head(&dqp->q_pinwait);
586
587 /*
588 * Because we want to use a counting completion, complete
589 * the flush completion once to allow a single access to
590 * the flush completion without blocking.
591 */
592 init_completion(&dqp->q_flush);
593 complete(&dqp->q_flush);
594
595 /*
596 * Make sure group quotas have a different lock class than user
597 * quotas.
598 */
Dave Chinnerf112a042013-09-30 09:37:03 +1000599 switch (type) {
600 case XFS_DQ_USER:
601 /* uses the default lock class */
602 break;
603 case XFS_DQ_GROUP:
604 lockdep_set_class(&dqp->q_qlock, &xfs_dquot_group_class);
605 break;
606 case XFS_DQ_PROJ:
607 lockdep_set_class(&dqp->q_qlock, &xfs_dquot_project_class);
608 break;
609 default:
610 ASSERT(0);
611 break;
612 }
Christoph Hellwig92b2e5b32012-02-01 13:57:20 +0000613
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100614 XFS_STATS_INC(mp, xs_qm_dquot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000616 trace_xfs_dqread(dqp);
617
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000618 if (flags & XFS_QMOPT_DQALLOC) {
Christoph Hellwig253f4912016-04-06 09:19:55 +1000619 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_qm_dqalloc,
620 XFS_QM_DQALLOC_SPACE_RES(mp), 0, 0, &tp);
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000621 if (error)
Christoph Hellwig253f4912016-04-06 09:19:55 +1000622 goto error0;
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000623 }
624
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 /*
626 * get a pointer to the on-disk dquot and the buffer containing it
627 * dqp already knows its own type (GROUP/USER).
628 */
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000629 error = xfs_qm_dqtobp(&tp, dqp, &ddqp, &bp, flags);
630 if (error) {
631 /*
632 * This can happen if quotas got turned off (ESRCH),
633 * or if the dquot didn't exist on disk and we ask to
634 * allocate (ENOENT).
635 */
636 trace_xfs_dqread_fail(dqp);
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000637 goto error1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 }
639
640 /* copy everything from disk dquot to the incore dquot */
641 memcpy(&dqp->q_core, ddqp, sizeof(xfs_disk_dquot_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 xfs_qm_dquot_logitem_init(dqp);
643
644 /*
645 * Reservation counters are defined as reservation plus current usage
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300646 * to avoid having to add every time.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100648 dqp->q_res_bcount = be64_to_cpu(ddqp->d_bcount);
649 dqp->q_res_icount = be64_to_cpu(ddqp->d_icount);
650 dqp->q_res_rtbcount = be64_to_cpu(ddqp->d_rtbcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Brian Fosterb1366452013-03-18 10:51:46 -0400652 /* initialize the dquot speculative prealloc thresholds */
653 xfs_dquot_set_prealloc_limits(dqp);
654
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 /* Mark the buf so that this will stay incore a little longer */
Christoph Hellwig38f23232011-10-10 16:52:45 +0000656 xfs_buf_set_ref(bp, XFS_DQUOT_REF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
658 /*
659 * We got the buffer with a xfs_trans_read_buf() (in dqtobp())
660 * So we need to release with xfs_trans_brelse().
661 * The strategy here is identical to that of inodes; we lock
662 * the dquot in xfs_qm_dqget() before making it accessible to
663 * others. This is because dquots, like inodes, need a good level of
664 * concurrency, and we don't want to take locks on the entire buffers
665 * for dquot accesses.
666 * Note also that the dquot buffer may even be dirty at this point, if
667 * this particular dquot was repaired. We still aren't afraid to
668 * brelse it because we have the changes incore.
669 */
Christoph Hellwig0c842ad2011-07-08 14:36:19 +0200670 ASSERT(xfs_buf_islocked(bp));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 xfs_trans_brelse(tp, bp);
672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 if (tp) {
Christoph Hellwig70393312015-06-04 13:48:08 +1000674 error = xfs_trans_commit(tp);
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000675 if (error)
676 goto error0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 }
678
679 *O_dqpp = dqp;
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000680 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000682error1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 if (tp)
Christoph Hellwig4906e212015-06-04 13:47:56 +1000684 xfs_trans_cancel(tp);
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000685error0:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 xfs_qm_dqdestroy(dqp);
687 *O_dqpp = NULL;
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000688 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689}
690
691/*
Eric Sandeen296c24e2016-02-08 11:27:38 +1100692 * Advance to the next id in the current chunk, or if at the
693 * end of the chunk, skip ahead to first id in next allocated chunk
694 * using the SEEK_DATA interface.
695 */
Eryu Guan6e3e6d52016-04-06 09:47:21 +1000696static int
Eric Sandeen296c24e2016-02-08 11:27:38 +1100697xfs_dq_get_next_id(
698 xfs_mount_t *mp,
699 uint type,
700 xfs_dqid_t *id,
701 loff_t eof)
702{
703 struct xfs_inode *quotip;
704 xfs_fsblock_t start;
705 loff_t offset;
706 uint lock;
707 xfs_dqid_t next_id;
708 int error = 0;
709
710 /* Simple advance */
711 next_id = *id + 1;
712
713 /* If new ID is within the current chunk, advancing it sufficed */
714 if (next_id % mp->m_quotainfo->qi_dqperchunk) {
715 *id = next_id;
716 return 0;
717 }
718
719 /* Nope, next_id is now past the current chunk, so find the next one */
720 start = (xfs_fsblock_t)next_id / mp->m_quotainfo->qi_dqperchunk;
721
722 quotip = xfs_quota_inode(mp, type);
723 lock = xfs_ilock_data_map_shared(quotip);
724
725 offset = __xfs_seek_hole_data(VFS_I(quotip), XFS_FSB_TO_B(mp, start),
726 eof, SEEK_DATA);
727 if (offset < 0)
728 error = offset;
729
730 xfs_iunlock(quotip, lock);
731
732 /* -ENXIO is essentially "no more data" */
733 if (error)
734 return (error == -ENXIO ? -ENOENT: error);
735
736 /* Convert next data offset back to a quota id */
737 *id = XFS_B_TO_FSB(mp, offset) * mp->m_quotainfo->qi_dqperchunk;
738 return 0;
739}
740
741/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 * Given the file system, inode OR id, and type (UDQUOT/GDQUOT), return a
743 * a locked dquot, doing an allocation (if requested) as needed.
744 * When both an inode and an id are given, the inode's id takes precedence.
745 * That is, if the id changes while we don't hold the ilock inside this
746 * function, the new dquot is returned, not necessarily the one requested
747 * in the id argument.
748 */
749int
750xfs_qm_dqget(
751 xfs_mount_t *mp,
752 xfs_inode_t *ip, /* locked inode (optional) */
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000753 xfs_dqid_t id, /* uid/projid/gid depending on type */
754 uint type, /* XFS_DQ_USER/XFS_DQ_PROJ/XFS_DQ_GROUP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
756 xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */
757{
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000758 struct xfs_quotainfo *qi = mp->m_quotainfo;
Chandra Seetharaman329e0872013-06-27 17:25:05 -0500759 struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000760 struct xfs_dquot *dqp;
Eric Sandeen296c24e2016-02-08 11:27:38 +1100761 loff_t eof = 0;
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000762 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
764 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
765 if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) ||
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000766 (! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 (! XFS_IS_GQUOTA_ON(mp) && type == XFS_DQ_GROUP)) {
Dave Chinner24513372014-06-25 14:58:08 +1000768 return -ESRCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
771#ifdef DEBUG
772 if (xfs_do_dqerror) {
773 if ((xfs_dqerror_target == mp->m_ddev_targp) &&
774 (xfs_dqreq_num++ % xfs_dqerror_mod) == 0) {
Dave Chinner0b932cc2011-03-07 10:08:35 +1100775 xfs_debug(mp, "Returning error in dqget");
Dave Chinner24513372014-06-25 14:58:08 +1000776 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 }
778 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000780 ASSERT(type == XFS_DQ_USER ||
781 type == XFS_DQ_PROJ ||
782 type == XFS_DQ_GROUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 if (ip) {
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000784 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Chandra Seetharaman36731412012-01-23 17:31:30 +0000785 ASSERT(xfs_inode_dquot(ip, type) == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 }
787#endif
Christoph Hellwig92678552011-12-06 21:58:18 +0000788
Eric Sandeen296c24e2016-02-08 11:27:38 +1100789 /* Get the end of the quota file if we need it */
790 if (flags & XFS_QMOPT_DQNEXT) {
791 struct xfs_inode *quotip;
792 xfs_fileoff_t last;
793 uint lock_mode;
794
795 quotip = xfs_quota_inode(mp, type);
796 lock_mode = xfs_ilock_data_map_shared(quotip);
797 error = xfs_bmap_last_offset(quotip, &last, XFS_DATA_FORK);
798 xfs_iunlock(quotip, lock_mode);
799 if (error)
800 return error;
801 eof = XFS_FSB_TO_B(mp, last);
802 }
803
Christoph Hellwig92678552011-12-06 21:58:18 +0000804restart:
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000805 mutex_lock(&qi->qi_tree_lock);
806 dqp = radix_tree_lookup(tree, id);
807 if (dqp) {
808 xfs_dqlock(dqp);
809 if (dqp->dq_flags & XFS_DQ_FREEING) {
810 xfs_dqunlock(dqp);
811 mutex_unlock(&qi->qi_tree_lock);
812 trace_xfs_dqget_freeing(dqp);
813 delay(1);
814 goto restart;
815 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
Eric Sandeen296c24e2016-02-08 11:27:38 +1100817 /* uninit / unused quota found in radix tree, keep looking */
818 if (flags & XFS_QMOPT_DQNEXT) {
819 if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
820 xfs_dqunlock(dqp);
821 mutex_unlock(&qi->qi_tree_lock);
822 error = xfs_dq_get_next_id(mp, type, &id, eof);
823 if (error)
824 return error;
825 goto restart;
826 }
827 }
828
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000829 dqp->q_nrefs++;
830 mutex_unlock(&qi->qi_tree_lock);
831
832 trace_xfs_dqget_hit(dqp);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100833 XFS_STATS_INC(mp, xs_qm_dqcachehits);
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000834 *O_dqpp = dqp;
835 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 }
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000837 mutex_unlock(&qi->qi_tree_lock);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100838 XFS_STATS_INC(mp, xs_qm_dqcachemisses);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
840 /*
841 * Dquot cache miss. We don't want to keep the inode lock across
842 * a (potential) disk read. Also we don't want to deal with the lock
843 * ordering between quotainode and this inode. OTOH, dropping the inode
844 * lock here means dealing with a chown that can happen before
845 * we re-acquire the lock.
846 */
847 if (ip)
848 xfs_iunlock(ip, XFS_ILOCK_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Christoph Hellwig97e7ade2011-12-06 21:58:24 +0000850 error = xfs_qm_dqread(mp, id, type, flags, &dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000852 if (ip)
853 xfs_ilock(ip, XFS_ILOCK_EXCL);
854
Eric Sandeen296c24e2016-02-08 11:27:38 +1100855 /* If we are asked to find next active id, keep looking */
856 if (error == -ENOENT && (flags & XFS_QMOPT_DQNEXT)) {
857 error = xfs_dq_get_next_id(mp, type, &id, eof);
858 if (!error)
859 goto restart;
860 }
861
Christoph Hellwig7ae44402011-12-06 21:58:25 +0000862 if (error)
863 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 if (ip) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 /*
867 * A dquot could be attached to this inode by now, since
868 * we had dropped the ilock.
869 */
Chandra Seetharaman36731412012-01-23 17:31:30 +0000870 if (xfs_this_quota_on(mp, type)) {
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000871 struct xfs_dquot *dqp1;
872
Chandra Seetharaman36731412012-01-23 17:31:30 +0000873 dqp1 = xfs_inode_dquot(ip, type);
874 if (dqp1) {
Christoph Hellwig191f8482010-04-20 17:01:53 +1000875 xfs_qm_dqdestroy(dqp);
Chandra Seetharaman36731412012-01-23 17:31:30 +0000876 dqp = dqp1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 xfs_dqlock(dqp);
878 goto dqret;
879 }
880 } else {
Chandra Seetharaman36731412012-01-23 17:31:30 +0000881 /* inode stays locked on return */
882 xfs_qm_dqdestroy(dqp);
Dave Chinner24513372014-06-25 14:58:08 +1000883 return -ESRCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 }
885 }
886
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000887 mutex_lock(&qi->qi_tree_lock);
Dave Chinner24513372014-06-25 14:58:08 +1000888 error = radix_tree_insert(tree, id, dqp);
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000889 if (unlikely(error)) {
Dave Chinner24513372014-06-25 14:58:08 +1000890 WARN_ON(error != -EEXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000892 /*
893 * Duplicate found. Just throw away the new dquot and start
894 * over.
895 */
896 mutex_unlock(&qi->qi_tree_lock);
897 trace_xfs_dqget_dup(dqp);
898 xfs_qm_dqdestroy(dqp);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100899 XFS_STATS_INC(mp, xs_qm_dquot_dups);
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000900 goto restart;
901 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902
903 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 * We return a locked dquot to the caller, with a reference taken
905 */
906 xfs_dqlock(dqp);
907 dqp->q_nrefs = 1;
908
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000909 qi->qi_dquots++;
Christoph Hellwig9f920f12012-03-13 08:52:35 +0000910 mutex_unlock(&qi->qi_tree_lock);
911
Eric Sandeen296c24e2016-02-08 11:27:38 +1100912 /* If we are asked to find next active id, keep looking */
913 if (flags & XFS_QMOPT_DQNEXT) {
914 if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
915 xfs_qm_dqput(dqp);
916 error = xfs_dq_get_next_id(mp, type, &id, eof);
917 if (error)
918 return error;
919 goto restart;
920 }
921 }
922
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 dqret:
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000924 ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000925 trace_xfs_dqget_miss(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 *O_dqpp = dqp;
Eric Sandeend99831f2014-06-22 15:03:54 +1000927 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928}
929
Christoph Hellwigf8739c32012-03-13 08:52:34 +0000930/*
931 * Release a reference to the dquot (decrement ref-count) and unlock it.
932 *
933 * If there is a group quota attached to this dquot, carefully release that
934 * too without tripping over deadlocks'n'stuff.
935 */
936void
937xfs_qm_dqput(
938 struct xfs_dquot *dqp)
939{
940 ASSERT(dqp->q_nrefs > 0);
941 ASSERT(XFS_DQ_IS_LOCKED(dqp));
942
943 trace_xfs_dqput(dqp);
944
Dave Chinner3c35337572014-05-05 17:30:15 +1000945 if (--dqp->q_nrefs == 0) {
946 struct xfs_quotainfo *qi = dqp->q_mount->m_quotainfo;
947 trace_xfs_dqput_free(dqp);
948
949 if (list_lru_add(&qi->qi_lru, &dqp->q_lru))
Bill O'Donnellff6d6af2015-10-12 18:21:22 +1100950 XFS_STATS_INC(dqp->q_mount, xs_qm_dquot_unused);
Dave Chinner3c35337572014-05-05 17:30:15 +1000951 }
952 xfs_dqunlock(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953}
954
955/*
956 * Release a dquot. Flush it if dirty, then dqput() it.
957 * dquot must not be locked.
958 */
959void
960xfs_qm_dqrele(
961 xfs_dquot_t *dqp)
962{
Christoph Hellwig7d095252009-06-08 15:33:32 +0200963 if (!dqp)
964 return;
965
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000966 trace_xfs_dqrele(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967
968 xfs_dqlock(dqp);
969 /*
970 * We don't care to flush it if the dquot is dirty here.
971 * That will create stutters that we want to avoid.
972 * Instead we do a delayed write when we try to reclaim
973 * a dirty dquot. Also xfs_sync will take part of the burden...
974 */
975 xfs_qm_dqput(dqp);
976}
977
Christoph Hellwigca30b2a2010-06-23 18:11:15 +1000978/*
979 * This is the dquot flushing I/O completion routine. It is called
980 * from interrupt level when the buffer containing the dquot is
981 * flushed to disk. It is responsible for removing the dquot logitem
982 * from the AIL if it has not been re-logged, and unlocking the dquot's
983 * flush lock. This behavior is very similar to that of inodes..
984 */
985STATIC void
986xfs_qm_dqflush_done(
987 struct xfs_buf *bp,
988 struct xfs_log_item *lip)
989{
990 xfs_dq_logitem_t *qip = (struct xfs_dq_logitem *)lip;
991 xfs_dquot_t *dqp = qip->qli_dquot;
992 struct xfs_ail *ailp = lip->li_ailp;
993
994 /*
995 * We only want to pull the item from the AIL if its
996 * location in the log has not changed since we started the flush.
997 * Thus, we only bother if the dquot's lsn has
998 * not changed. First we check the lsn outside the lock
999 * since it's cheaper, and then we recheck while
1000 * holding the lock before removing the dquot from the AIL.
1001 */
1002 if ((lip->li_flags & XFS_LI_IN_AIL) &&
1003 lip->li_lsn == qip->qli_flush_lsn) {
1004
1005 /* xfs_trans_ail_delete() drops the AIL lock. */
1006 spin_lock(&ailp->xa_lock);
1007 if (lip->li_lsn == qip->qli_flush_lsn)
Dave Chinner04913fd2012-04-23 15:58:41 +10001008 xfs_trans_ail_delete(ailp, lip, SHUTDOWN_CORRUPT_INCORE);
Christoph Hellwigca30b2a2010-06-23 18:11:15 +10001009 else
1010 spin_unlock(&ailp->xa_lock);
1011 }
1012
1013 /*
1014 * Release the dq's flush lock since we're done with it.
1015 */
1016 xfs_dqfunlock(dqp);
1017}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018
1019/*
1020 * Write a modified dquot to disk.
1021 * The dquot must be locked and the flush lock too taken by caller.
1022 * The flush lock will not be unlocked until the dquot reaches the disk,
1023 * but the dquot is free to be unlocked and modified by the caller
1024 * in the interim. Dquot is still locked on return. This behavior is
1025 * identical to that of inodes.
1026 */
1027int
1028xfs_qm_dqflush(
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001029 struct xfs_dquot *dqp,
1030 struct xfs_buf **bpp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031{
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001032 struct xfs_mount *mp = dqp->q_mount;
1033 struct xfs_buf *bp;
1034 struct xfs_disk_dquot *ddqp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036
1037 ASSERT(XFS_DQ_IS_LOCKED(dqp));
David Chinnere1f49cf2008-08-13 16:41:43 +10001038 ASSERT(!completion_done(&dqp->q_flush));
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001039
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001040 trace_xfs_dqflush(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001042 *bpp = NULL;
1043
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 xfs_qm_dqunpin_wait(dqp);
1045
1046 /*
1047 * This may have been unpinned because the filesystem is shutting
1048 * down forcibly. If that's the case we must not write this dquot
Christoph Hellwigdea96092012-04-23 15:58:31 +10001049 * to disk, because the log record didn't make it to disk.
1050 *
1051 * We also have to remove the log item from the AIL in this case,
1052 * as we wait for an emptry AIL as part of the unmount process.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 */
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001054 if (XFS_FORCED_SHUTDOWN(mp)) {
Christoph Hellwigdea96092012-04-23 15:58:31 +10001055 struct xfs_log_item *lip = &dqp->q_logitem.qli_item;
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001056 dqp->dq_flags &= ~XFS_DQ_DIRTY;
Christoph Hellwigdea96092012-04-23 15:58:31 +10001057
Brian Foster146e54b2015-08-19 10:01:08 +10001058 xfs_trans_ail_remove(lip, SHUTDOWN_CORRUPT_INCORE);
1059
Dave Chinner24513372014-06-25 14:58:08 +10001060 error = -EIO;
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001061 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 }
1063
1064 /*
1065 * Get the buffer containing the on-disk dquot
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 */
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001067 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dqp->q_blkno,
Dave Chinner5fd364f2014-08-04 12:43:26 +10001068 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1069 &xfs_dquot_buf_ops);
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001070 if (error)
1071 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001073 /*
1074 * Calculate the location of the dquot inside the buffer.
1075 */
Chandra Seetharaman62926042011-07-22 23:40:15 +00001076 ddqp = bp->b_addr + dqp->q_bufoffset;
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001077
1078 /*
1079 * A simple sanity check in case we got a corrupted dquot..
1080 */
Dave Chinner9aede1d2013-10-15 09:17:52 +11001081 error = xfs_dqcheck(mp, &dqp->q_core, be32_to_cpu(ddqp->d_id), 0,
Dave Chinnera0fa2b62011-03-07 10:01:35 +11001082 XFS_QMOPT_DOWARN, "dqflush (incore copy)");
1083 if (error) {
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001084 xfs_buf_relse(bp);
1085 xfs_dqfunlock(dqp);
1086 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
Dave Chinner24513372014-06-25 14:58:08 +10001087 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 }
1089
1090 /* This is the only portion of data that needs to persist */
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001091 memcpy(ddqp, &dqp->q_core, sizeof(xfs_disk_dquot_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092
1093 /*
1094 * Clear the dirty field and remember the flush lsn for later use.
1095 */
Christoph Hellwigacecf1b2010-09-06 01:44:45 +00001096 dqp->dq_flags &= ~XFS_DQ_DIRTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097
David Chinner7b2e2a32008-10-30 17:39:12 +11001098 xfs_trans_ail_copy_lsn(mp->m_ail, &dqp->q_logitem.qli_flush_lsn,
1099 &dqp->q_logitem.qli_item.li_lsn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100
1101 /*
Christoph Hellwig3fe58f32013-04-03 16:11:16 +11001102 * copy the lsn into the on-disk dquot now while we have the in memory
1103 * dquot here. This can't be done later in the write verifier as we
1104 * can't get access to the log item at that point in time.
Dave Chinner6fcdc592013-06-03 15:28:46 +10001105 *
1106 * We also calculate the CRC here so that the on-disk dquot in the
1107 * buffer always has a valid CRC. This ensures there is no possibility
1108 * of a dquot without an up-to-date CRC getting to disk.
Christoph Hellwig3fe58f32013-04-03 16:11:16 +11001109 */
1110 if (xfs_sb_version_hascrc(&mp->m_sb)) {
1111 struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddqp;
1112
1113 dqb->dd_lsn = cpu_to_be64(dqp->q_logitem.qli_item.li_lsn);
Dave Chinner6fcdc592013-06-03 15:28:46 +10001114 xfs_update_cksum((char *)dqb, sizeof(struct xfs_dqblk),
1115 XFS_DQUOT_CRC_OFF);
Christoph Hellwig3fe58f32013-04-03 16:11:16 +11001116 }
1117
1118 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 * Attach an iodone routine so that we can remove this dquot from the
1120 * AIL and release the flush lock once the dquot is synced to disk.
1121 */
Christoph Hellwigca30b2a2010-06-23 18:11:15 +10001122 xfs_buf_attach_iodone(bp, xfs_qm_dqflush_done,
1123 &dqp->q_logitem.qli_item);
1124
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 /*
1126 * If the buffer is pinned then push on the log so we won't
1127 * get stuck waiting in the write for too long.
1128 */
Chandra Seetharaman811e64c2011-07-22 23:40:27 +00001129 if (xfs_buf_ispinned(bp)) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001130 trace_xfs_dqflush_force(dqp);
Christoph Hellwiga14a3482010-01-19 09:56:46 +00001131 xfs_log_force(mp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 }
1133
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001134 trace_xfs_dqflush_done(dqp);
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001135 *bpp = bp;
1136 return 0;
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001137
Christoph Hellwigfe7257f2012-04-23 15:58:37 +10001138out_unlock:
1139 xfs_dqfunlock(dqp);
Dave Chinner24513372014-06-25 14:58:08 +10001140 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141}
1142
Christoph Hellwig5bb87a32009-01-19 02:03:19 +01001143/*
1144 * Lock two xfs_dquot structures.
1145 *
1146 * To avoid deadlocks we always lock the quota structure with
1147 * the lowerd id first.
1148 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149void
1150xfs_dqlock2(
1151 xfs_dquot_t *d1,
1152 xfs_dquot_t *d2)
1153{
1154 if (d1 && d2) {
1155 ASSERT(d1 != d2);
Christoph Hellwig1149d962005-11-02 15:01:12 +11001156 if (be32_to_cpu(d1->q_core.d_id) >
1157 be32_to_cpu(d2->q_core.d_id)) {
Christoph Hellwig5bb87a32009-01-19 02:03:19 +01001158 mutex_lock(&d2->q_qlock);
1159 mutex_lock_nested(&d1->q_qlock, XFS_QLOCK_NESTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 } else {
Christoph Hellwig5bb87a32009-01-19 02:03:19 +01001161 mutex_lock(&d1->q_qlock);
1162 mutex_lock_nested(&d2->q_qlock, XFS_QLOCK_NESTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 }
Christoph Hellwig5bb87a32009-01-19 02:03:19 +01001164 } else if (d1) {
1165 mutex_lock(&d1->q_qlock);
1166 } else if (d2) {
1167 mutex_lock(&d2->q_qlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 }
1169}
1170
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001171int __init
1172xfs_qm_init(void)
1173{
1174 xfs_qm_dqzone =
1175 kmem_zone_init(sizeof(struct xfs_dquot), "xfs_dquot");
1176 if (!xfs_qm_dqzone)
1177 goto out;
1178
1179 xfs_qm_dqtrxzone =
1180 kmem_zone_init(sizeof(struct xfs_dquot_acct), "xfs_dqtrx");
1181 if (!xfs_qm_dqtrxzone)
1182 goto out_free_dqzone;
1183
1184 return 0;
1185
1186out_free_dqzone:
1187 kmem_zone_destroy(xfs_qm_dqzone);
1188out:
1189 return -ENOMEM;
1190}
1191
Gerard Snitselaar1c2ccc62012-03-16 18:36:18 +00001192void
Christoph Hellwiga05931c2012-03-13 08:52:37 +00001193xfs_qm_exit(void)
1194{
1195 kmem_zone_destroy(xfs_qm_dqtrxzone);
1196 kmem_zone_destroy(xfs_qm_dqzone);
1197}