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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"
Nathan Scotta844f452005-11-02 14:38:42 +110020#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110022#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_dir2.h"
27#include "xfs_alloc.h"
28#include "xfs_dmapi.h"
29#include "xfs_quota.h"
30#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_bmap_btree.h"
Nathan Scotta844f452005-11-02 14:38:42 +110032#include "xfs_alloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_ialloc_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_dir2_sf.h"
Nathan Scotta844f452005-11-02 14:38:42 +110035#include "xfs_attr_sf.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include "xfs_dinode.h"
37#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110038#include "xfs_btree.h"
39#include "xfs_ialloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include "xfs_rtalloc.h"
42#include "xfs_error.h"
43#include "xfs_itable.h"
44#include "xfs_rw.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include "xfs_attr.h"
46#include "xfs_buf_item.h"
47#include "xfs_trans_space.h"
48#include "xfs_trans_priv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include "xfs_qm.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000050#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52
53/*
54 LOCK ORDER
55
56 inode lock (ilock)
57 dquot hash-chain lock (hashlock)
58 xqm dquot freelist lock (freelistlock
59 mount's dquot list lock (mplistlock)
60 user dquot lock - lock ordering among dquots is based on the uid or gid
61 group dquot lock - similar to udquots. Between the two dquots, the udquot
62 has to be locked first.
63 pin lock - the dquot lock must be held to take this lock.
64 flush lock - ditto.
65*/
66
67STATIC void xfs_qm_dqflush_done(xfs_buf_t *, xfs_dq_logitem_t *);
68
69#ifdef DEBUG
70xfs_buftarg_t *xfs_dqerror_target;
71int xfs_do_dqerror;
72int xfs_dqreq_num;
73int xfs_dqerror_mod = 33;
74#endif
75
Christoph Hellwig98b8c7a2009-01-19 02:03:25 +010076static struct lock_class_key xfs_dquot_other_class;
77
Linus Torvalds1da177e2005-04-16 15:20:36 -070078/*
79 * Allocate and initialize a dquot. We don't always allocate fresh memory;
80 * we try to reclaim a free dquot if the number of incore dquots are above
81 * a threshold.
82 * The only field inside the core that gets initialized at this point
83 * is the d_id field. The idea is to fill in the entire q_core
84 * when we read in the on disk dquot.
85 */
Christoph Hellwigba0f32d2005-06-21 15:36:52 +100086STATIC xfs_dquot_t *
Linus Torvalds1da177e2005-04-16 15:20:36 -070087xfs_qm_dqinit(
88 xfs_mount_t *mp,
89 xfs_dqid_t id,
90 uint type)
91{
92 xfs_dquot_t *dqp;
93 boolean_t brandnewdquot;
94
95 brandnewdquot = xfs_qm_dqalloc_incore(&dqp);
96 dqp->dq_flags = type;
Christoph Hellwig1149d962005-11-02 15:01:12 +110097 dqp->q_core.d_id = cpu_to_be32(id);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 dqp->q_mount = mp;
99
100 /*
101 * No need to re-initialize these if this is a reclaimed dquot.
102 */
103 if (brandnewdquot) {
104 dqp->dq_flnext = dqp->dq_flprev = dqp;
Jes Sorensen794ee1b2006-01-09 15:59:21 -0800105 mutex_init(&dqp->q_qlock);
Peter Leckiebc3048e2008-10-30 17:05:04 +1100106 init_waitqueue_head(&dqp->q_pinwait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
David Chinnere1f49cf2008-08-13 16:41:43 +1000108 /*
109 * Because we want to use a counting completion, complete
110 * the flush completion once to allow a single access to
111 * the flush completion without blocking.
112 */
113 init_completion(&dqp->q_flush);
114 complete(&dqp->q_flush);
115
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000116 trace_xfs_dqinit(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 } else {
118 /*
119 * Only the q_core portion was zeroed in dqreclaim_one().
120 * So, we need to reset others.
121 */
122 dqp->q_nrefs = 0;
123 dqp->q_blkno = 0;
124 dqp->MPL_NEXT = dqp->HL_NEXT = NULL;
125 dqp->HL_PREVP = dqp->MPL_PREVP = NULL;
126 dqp->q_bufoffset = 0;
127 dqp->q_fileoffset = 0;
128 dqp->q_transp = NULL;
129 dqp->q_gdquot = NULL;
130 dqp->q_res_bcount = 0;
131 dqp->q_res_icount = 0;
132 dqp->q_res_rtbcount = 0;
Peter Leckiebc3048e2008-10-30 17:05:04 +1100133 atomic_set(&dqp->q_pincount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 dqp->q_hash = NULL;
135 ASSERT(dqp->dq_flnext == dqp->dq_flprev);
136
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000137 trace_xfs_dqreuse(dqp);
Christoph Hellwig98b8c7a2009-01-19 02:03:25 +0100138 }
139
140 /*
141 * In either case we need to make sure group quotas have a different
142 * lock class than user quotas, to make sure lockdep knows we can
143 * locks of one of each at the same time.
144 */
145 if (!(type & XFS_DQ_USER))
146 lockdep_set_class(&dqp->q_qlock, &xfs_dquot_other_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
148 /*
149 * log item gets initialized later
150 */
151 return (dqp);
152}
153
154/*
155 * This is called to free all the memory associated with a dquot
156 */
157void
158xfs_qm_dqdestroy(
159 xfs_dquot_t *dqp)
160{
161 ASSERT(! XFS_DQ_IS_ON_FREELIST(dqp));
162
163 mutex_destroy(&dqp->q_qlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 sv_destroy(&dqp->q_pinwait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 kmem_zone_free(xfs_Gqm->qm_dqzone, dqp);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 atomic_dec(&xfs_Gqm->qm_totaldquots);
168}
169
170/*
171 * This is what a 'fresh' dquot inside a dquot chunk looks like on disk.
172 */
173STATIC void
174xfs_qm_dqinit_core(
175 xfs_dqid_t id,
176 uint type,
177 xfs_dqblk_t *d)
178{
179 /*
180 * Caller has zero'd the entire dquot 'chunk' already.
181 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100182 d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
183 d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
184 d->dd_diskdq.d_id = cpu_to_be32(id);
185 d->dd_diskdq.d_flags = type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186}
187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188/*
189 * If default limits are in force, push them into the dquot now.
190 * We overwrite the dquot limits only if they are zero and this
191 * is not the root dquot.
192 */
193void
194xfs_qm_adjust_dqlimits(
195 xfs_mount_t *mp,
196 xfs_disk_dquot_t *d)
197{
198 xfs_quotainfo_t *q = mp->m_quotainfo;
199
200 ASSERT(d->d_id);
201
202 if (q->qi_bsoftlimit && !d->d_blk_softlimit)
Christoph Hellwig1149d962005-11-02 15:01:12 +1100203 d->d_blk_softlimit = cpu_to_be64(q->qi_bsoftlimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 if (q->qi_bhardlimit && !d->d_blk_hardlimit)
Christoph Hellwig1149d962005-11-02 15:01:12 +1100205 d->d_blk_hardlimit = cpu_to_be64(q->qi_bhardlimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 if (q->qi_isoftlimit && !d->d_ino_softlimit)
Christoph Hellwig1149d962005-11-02 15:01:12 +1100207 d->d_ino_softlimit = cpu_to_be64(q->qi_isoftlimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 if (q->qi_ihardlimit && !d->d_ino_hardlimit)
Christoph Hellwig1149d962005-11-02 15:01:12 +1100209 d->d_ino_hardlimit = cpu_to_be64(q->qi_ihardlimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 if (q->qi_rtbsoftlimit && !d->d_rtb_softlimit)
Christoph Hellwig1149d962005-11-02 15:01:12 +1100211 d->d_rtb_softlimit = cpu_to_be64(q->qi_rtbsoftlimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 if (q->qi_rtbhardlimit && !d->d_rtb_hardlimit)
Christoph Hellwig1149d962005-11-02 15:01:12 +1100213 d->d_rtb_hardlimit = cpu_to_be64(q->qi_rtbhardlimit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
216/*
217 * Check the limits and timers of a dquot and start or reset timers
218 * if necessary.
219 * This gets called even when quota enforcement is OFF, which makes our
220 * life a little less complicated. (We just don't reject any quota
221 * reservations in that case, when enforcement is off).
222 * We also return 0 as the values of the timers in Q_GETQUOTA calls, when
223 * enforcement's off.
224 * In contrast, warnings are a little different in that they don't
Nathan Scott754002b2005-06-21 15:49:06 +1000225 * 'automatically' get started when limits get exceeded. They do
226 * get reset to zero, however, when we find the count to be under
227 * the soft limit (they are only ever set non-zero via userspace).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 */
229void
230xfs_qm_adjust_dqtimers(
231 xfs_mount_t *mp,
232 xfs_disk_dquot_t *d)
233{
234 ASSERT(d->d_id);
235
236#ifdef QUOTADEBUG
Christoph Hellwig1149d962005-11-02 15:01:12 +1100237 if (d->d_blk_hardlimit)
238 ASSERT(be64_to_cpu(d->d_blk_softlimit) <=
239 be64_to_cpu(d->d_blk_hardlimit));
240 if (d->d_ino_hardlimit)
241 ASSERT(be64_to_cpu(d->d_ino_softlimit) <=
242 be64_to_cpu(d->d_ino_hardlimit));
243 if (d->d_rtb_hardlimit)
244 ASSERT(be64_to_cpu(d->d_rtb_softlimit) <=
245 be64_to_cpu(d->d_rtb_hardlimit));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246#endif
247 if (!d->d_btimer) {
Christoph Hellwig1149d962005-11-02 15:01:12 +1100248 if ((d->d_blk_softlimit &&
249 (be64_to_cpu(d->d_bcount) >=
250 be64_to_cpu(d->d_blk_softlimit))) ||
251 (d->d_blk_hardlimit &&
252 (be64_to_cpu(d->d_bcount) >=
253 be64_to_cpu(d->d_blk_hardlimit)))) {
254 d->d_btimer = cpu_to_be32(get_seconds() +
255 XFS_QI_BTIMELIMIT(mp));
Nathan Scott754002b2005-06-21 15:49:06 +1000256 } else {
257 d->d_bwarns = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 }
259 } else {
260 if ((!d->d_blk_softlimit ||
Christoph Hellwig1149d962005-11-02 15:01:12 +1100261 (be64_to_cpu(d->d_bcount) <
262 be64_to_cpu(d->d_blk_softlimit))) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 (!d->d_blk_hardlimit ||
Christoph Hellwig1149d962005-11-02 15:01:12 +1100264 (be64_to_cpu(d->d_bcount) <
265 be64_to_cpu(d->d_blk_hardlimit)))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 d->d_btimer = 0;
267 }
268 }
269
270 if (!d->d_itimer) {
Christoph Hellwig1149d962005-11-02 15:01:12 +1100271 if ((d->d_ino_softlimit &&
272 (be64_to_cpu(d->d_icount) >=
273 be64_to_cpu(d->d_ino_softlimit))) ||
274 (d->d_ino_hardlimit &&
275 (be64_to_cpu(d->d_icount) >=
276 be64_to_cpu(d->d_ino_hardlimit)))) {
277 d->d_itimer = cpu_to_be32(get_seconds() +
278 XFS_QI_ITIMELIMIT(mp));
Nathan Scott754002b2005-06-21 15:49:06 +1000279 } else {
280 d->d_iwarns = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 }
282 } else {
283 if ((!d->d_ino_softlimit ||
Christoph Hellwig1149d962005-11-02 15:01:12 +1100284 (be64_to_cpu(d->d_icount) <
285 be64_to_cpu(d->d_ino_softlimit))) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 (!d->d_ino_hardlimit ||
Christoph Hellwig1149d962005-11-02 15:01:12 +1100287 (be64_to_cpu(d->d_icount) <
288 be64_to_cpu(d->d_ino_hardlimit)))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 d->d_itimer = 0;
290 }
291 }
292
293 if (!d->d_rtbtimer) {
Christoph Hellwig1149d962005-11-02 15:01:12 +1100294 if ((d->d_rtb_softlimit &&
295 (be64_to_cpu(d->d_rtbcount) >=
296 be64_to_cpu(d->d_rtb_softlimit))) ||
297 (d->d_rtb_hardlimit &&
298 (be64_to_cpu(d->d_rtbcount) >=
299 be64_to_cpu(d->d_rtb_hardlimit)))) {
300 d->d_rtbtimer = cpu_to_be32(get_seconds() +
301 XFS_QI_RTBTIMELIMIT(mp));
Nathan Scott754002b2005-06-21 15:49:06 +1000302 } else {
303 d->d_rtbwarns = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 }
305 } else {
306 if ((!d->d_rtb_softlimit ||
Christoph Hellwig1149d962005-11-02 15:01:12 +1100307 (be64_to_cpu(d->d_rtbcount) <
308 be64_to_cpu(d->d_rtb_softlimit))) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 (!d->d_rtb_hardlimit ||
Christoph Hellwig1149d962005-11-02 15:01:12 +1100310 (be64_to_cpu(d->d_rtbcount) <
311 be64_to_cpu(d->d_rtb_hardlimit)))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 d->d_rtbtimer = 0;
313 }
314 }
315}
316
317/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 * initialize a buffer full of dquots and log the whole thing
319 */
320STATIC void
321xfs_qm_init_dquot_blk(
322 xfs_trans_t *tp,
323 xfs_mount_t *mp,
324 xfs_dqid_t id,
325 uint type,
326 xfs_buf_t *bp)
327{
328 xfs_dqblk_t *d;
329 int curid, i;
330
331 ASSERT(tp);
332 ASSERT(XFS_BUF_ISBUSY(bp));
333 ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
334
335 d = (xfs_dqblk_t *)XFS_BUF_PTR(bp);
336
337 /*
338 * ID of the first dquot in the block - id's are zero based.
339 */
340 curid = id - (id % XFS_QM_DQPERBLK(mp));
341 ASSERT(curid >= 0);
342 memset(d, 0, BBTOB(XFS_QI_DQCHUNKLEN(mp)));
343 for (i = 0; i < XFS_QM_DQPERBLK(mp); i++, d++, curid++)
344 xfs_qm_dqinit_core(curid, type, d);
345 xfs_trans_dquot_buf(tp, bp,
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000346 (type & XFS_DQ_USER ? XFS_BLI_UDQUOT_BUF :
347 ((type & XFS_DQ_PROJ) ? XFS_BLI_PDQUOT_BUF :
348 XFS_BLI_GDQUOT_BUF)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 xfs_trans_log_buf(tp, bp, 0, BBTOB(XFS_QI_DQCHUNKLEN(mp)) - 1);
350}
351
352
353
354/*
355 * Allocate a block and fill it with dquots.
356 * This is called when the bmapi finds a hole.
357 */
358STATIC int
359xfs_qm_dqalloc(
Tim Shimminefa092f2005-09-05 08:29:01 +1000360 xfs_trans_t **tpp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 xfs_mount_t *mp,
362 xfs_dquot_t *dqp,
363 xfs_inode_t *quotip,
364 xfs_fileoff_t offset_fsb,
365 xfs_buf_t **O_bpp)
366{
367 xfs_fsblock_t firstblock;
368 xfs_bmap_free_t flist;
369 xfs_bmbt_irec_t map;
370 int nmaps, error, committed;
371 xfs_buf_t *bp;
Tim Shimminefa092f2005-09-05 08:29:01 +1000372 xfs_trans_t *tp = *tpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374 ASSERT(tp != NULL);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000375
376 trace_xfs_dqalloc(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378 /*
379 * Initialize the bmap freelist prior to calling bmapi code.
380 */
Eric Sandeen9d87c312009-01-14 23:22:07 -0600381 xfs_bmap_init(&flist, &firstblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 xfs_ilock(quotip, XFS_ILOCK_EXCL);
383 /*
384 * Return if this type of quotas is turned off while we didn't
385 * have an inode lock
386 */
387 if (XFS_IS_THIS_QUOTA_OFF(dqp)) {
388 xfs_iunlock(quotip, XFS_ILOCK_EXCL);
389 return (ESRCH);
390 }
391
392 /*
393 * xfs_trans_commit normally decrements the vnode ref count
394 * when it unlocks the inode. Since we want to keep the quota
395 * inode around, we bump the vnode ref count now.
396 */
Christoph Hellwig0b1f91772008-08-13 16:13:09 +1000397 IHOLD(quotip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
399 xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL);
400 nmaps = 1;
401 if ((error = xfs_bmapi(tp, quotip,
402 offset_fsb, XFS_DQUOT_CLUSTER_SIZE_FSB,
403 XFS_BMAPI_METADATA | XFS_BMAPI_WRITE,
404 &firstblock,
405 XFS_QM_DQALLOC_SPACE_RES(mp),
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000406 &map, &nmaps, &flist, NULL))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 goto error0;
408 }
409 ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB);
410 ASSERT(nmaps == 1);
411 ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
412 (map.br_startblock != HOLESTARTBLOCK));
413
414 /*
415 * Keep track of the blkno to save a lookup later
416 */
417 dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
418
419 /* now we can just get the buffer (there's nothing to read yet) */
420 bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
421 dqp->q_blkno,
422 XFS_QI_DQCHUNKLEN(mp),
423 0);
424 if (!bp || (error = XFS_BUF_GETERROR(bp)))
425 goto error1;
426 /*
427 * Make a chunk of dquots out of this buffer and log
428 * the entire thing.
429 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100430 xfs_qm_init_dquot_blk(tp, mp, be32_to_cpu(dqp->q_core.d_id),
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000431 dqp->dq_flags & XFS_DQ_ALLTYPES, bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
Tim Shimminefa092f2005-09-05 08:29:01 +1000433 /*
434 * xfs_bmap_finish() may commit the current transaction and
435 * start a second transaction if the freelist is not empty.
436 *
437 * Since we still want to modify this buffer, we need to
438 * ensure that the buffer is not released on commit of
439 * the first transaction and ensure the buffer is added to the
440 * second transaction.
441 *
442 * If there is only one transaction then don't stop the buffer
443 * from being released when it commits later on.
444 */
445
446 xfs_trans_bhold(tp, bp);
447
Eric Sandeenf7c99b62007-02-10 18:37:16 +1100448 if ((error = xfs_bmap_finish(tpp, &flist, &committed))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 goto error1;
450 }
451
Tim Shimminefa092f2005-09-05 08:29:01 +1000452 if (committed) {
453 tp = *tpp;
454 xfs_trans_bjoin(tp, bp);
455 } else {
456 xfs_trans_bhold_release(tp, bp);
457 }
458
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 *O_bpp = bp;
460 return 0;
461
462 error1:
463 xfs_bmap_cancel(&flist);
464 error0:
465 xfs_iunlock(quotip, XFS_ILOCK_EXCL);
466
467 return (error);
468}
469
470/*
471 * Maps a dquot to the buffer containing its on-disk version.
472 * This returns a ptr to the buffer containing the on-disk dquot
473 * in the bpp param, and a ptr to the on-disk dquot within that buffer
474 */
475STATIC int
476xfs_qm_dqtobp(
Tim Shimminefa092f2005-09-05 08:29:01 +1000477 xfs_trans_t **tpp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 xfs_dquot_t *dqp,
479 xfs_disk_dquot_t **O_ddpp,
480 xfs_buf_t **O_bpp,
481 uint flags)
482{
483 xfs_bmbt_irec_t map;
484 int nmaps, error;
485 xfs_buf_t *bp;
486 xfs_inode_t *quotip;
487 xfs_mount_t *mp;
488 xfs_disk_dquot_t *ddq;
489 xfs_dqid_t id;
490 boolean_t newdquot;
Tim Shimminefa092f2005-09-05 08:29:01 +1000491 xfs_trans_t *tp = (tpp ? *tpp : NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
493 mp = dqp->q_mount;
Christoph Hellwig1149d962005-11-02 15:01:12 +1100494 id = be32_to_cpu(dqp->q_core.d_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 nmaps = 1;
496 newdquot = B_FALSE;
497
498 /*
499 * If we don't know where the dquot lives, find out.
500 */
501 if (dqp->q_blkno == (xfs_daddr_t) 0) {
502 /* We use the id as an index */
Nathan Scottc310ab62005-11-02 10:31:41 +1100503 dqp->q_fileoffset = (xfs_fileoff_t)id / XFS_QM_DQPERBLK(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 nmaps = 1;
505 quotip = XFS_DQ_TO_QIP(dqp);
506 xfs_ilock(quotip, XFS_ILOCK_SHARED);
507 /*
508 * Return if this type of quotas is turned off while we didn't
509 * have an inode lock
510 */
511 if (XFS_IS_THIS_QUOTA_OFF(dqp)) {
512 xfs_iunlock(quotip, XFS_ILOCK_SHARED);
513 return (ESRCH);
514 }
515 /*
516 * Find the block map; no allocations yet
517 */
518 error = xfs_bmapi(NULL, quotip, dqp->q_fileoffset,
519 XFS_DQUOT_CLUSTER_SIZE_FSB,
520 XFS_BMAPI_METADATA,
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000521 NULL, 0, &map, &nmaps, NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523 xfs_iunlock(quotip, XFS_ILOCK_SHARED);
524 if (error)
525 return (error);
526 ASSERT(nmaps == 1);
527 ASSERT(map.br_blockcount == 1);
528
529 /*
530 * offset of dquot in the (fixed sized) dquot chunk.
531 */
532 dqp->q_bufoffset = (id % XFS_QM_DQPERBLK(mp)) *
533 sizeof(xfs_dqblk_t);
534 if (map.br_startblock == HOLESTARTBLOCK) {
535 /*
536 * We don't allocate unless we're asked to
537 */
538 if (!(flags & XFS_QMOPT_DQALLOC))
539 return (ENOENT);
540
541 ASSERT(tp);
Tim Shimminefa092f2005-09-05 08:29:01 +1000542 if ((error = xfs_qm_dqalloc(tpp, mp, dqp, quotip,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 dqp->q_fileoffset, &bp)))
544 return (error);
Tim Shimminefa092f2005-09-05 08:29:01 +1000545 tp = *tpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 newdquot = B_TRUE;
547 } else {
548 /*
549 * store the blkno etc so that we don't have to do the
550 * mapping all the time
551 */
552 dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
553 }
554 }
555 ASSERT(dqp->q_blkno != DELAYSTARTBLOCK);
556 ASSERT(dqp->q_blkno != HOLESTARTBLOCK);
557
558 /*
559 * Read in the buffer, unless we've just done the allocation
560 * (in which case we already have the buf).
561 */
562 if (! newdquot) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000563 trace_xfs_dqtobp_read(dqp);
564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 if ((error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
566 dqp->q_blkno,
567 XFS_QI_DQCHUNKLEN(mp),
568 0, &bp))) {
569 return (error);
570 }
571 if (error || !bp)
572 return XFS_ERROR(error);
573 }
574 ASSERT(XFS_BUF_ISBUSY(bp));
575 ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
576
577 /*
578 * calculate the location of the dquot inside the buffer.
579 */
580 ddq = (xfs_disk_dquot_t *)((char *)XFS_BUF_PTR(bp) + dqp->q_bufoffset);
581
582 /*
583 * A simple sanity check in case we got a corrupted dquot...
584 */
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000585 if (xfs_qm_dqcheck(ddq, id, dqp->dq_flags & XFS_DQ_ALLTYPES,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 flags & (XFS_QMOPT_DQREPAIR|XFS_QMOPT_DOWARN),
587 "dqtobp")) {
588 if (!(flags & XFS_QMOPT_DQREPAIR)) {
589 xfs_trans_brelse(tp, bp);
590 return XFS_ERROR(EIO);
591 }
592 XFS_BUF_BUSY(bp); /* We dirtied this */
593 }
594
595 *O_bpp = bp;
596 *O_ddpp = ddq;
597
598 return (0);
599}
600
601
602/*
603 * Read in the ondisk dquot using dqtobp() then copy it to an incore version,
604 * and release the buffer immediately.
605 *
606 */
607/* ARGSUSED */
608STATIC int
609xfs_qm_dqread(
Tim Shimminefa092f2005-09-05 08:29:01 +1000610 xfs_trans_t **tpp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 xfs_dqid_t id,
612 xfs_dquot_t *dqp, /* dquot to get filled in */
613 uint flags)
614{
615 xfs_disk_dquot_t *ddqp;
616 xfs_buf_t *bp;
617 int error;
Tim Shimminefa092f2005-09-05 08:29:01 +1000618 xfs_trans_t *tp;
619
620 ASSERT(tpp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000622 trace_xfs_dqread(dqp);
623
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 /*
625 * get a pointer to the on-disk dquot and the buffer containing it
626 * dqp already knows its own type (GROUP/USER).
627 */
Tim Shimminefa092f2005-09-05 08:29:01 +1000628 if ((error = xfs_qm_dqtobp(tpp, dqp, &ddqp, &bp, flags))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 return (error);
630 }
Tim Shimminefa092f2005-09-05 08:29:01 +1000631 tp = *tpp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
633 /* copy everything from disk dquot to the incore dquot */
634 memcpy(&dqp->q_core, ddqp, sizeof(xfs_disk_dquot_t));
Christoph Hellwig1149d962005-11-02 15:01:12 +1100635 ASSERT(be32_to_cpu(dqp->q_core.d_id) == id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 xfs_qm_dquot_logitem_init(dqp);
637
638 /*
639 * Reservation counters are defined as reservation plus current usage
640 * to avoid having to add everytime.
641 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100642 dqp->q_res_bcount = be64_to_cpu(ddqp->d_bcount);
643 dqp->q_res_icount = be64_to_cpu(ddqp->d_icount);
644 dqp->q_res_rtbcount = be64_to_cpu(ddqp->d_rtbcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
646 /* Mark the buf so that this will stay incore a little longer */
647 XFS_BUF_SET_VTYPE_REF(bp, B_FS_DQUOT, XFS_DQUOT_REF);
648
649 /*
650 * We got the buffer with a xfs_trans_read_buf() (in dqtobp())
651 * So we need to release with xfs_trans_brelse().
652 * The strategy here is identical to that of inodes; we lock
653 * the dquot in xfs_qm_dqget() before making it accessible to
654 * others. This is because dquots, like inodes, need a good level of
655 * concurrency, and we don't want to take locks on the entire buffers
656 * for dquot accesses.
657 * Note also that the dquot buffer may even be dirty at this point, if
658 * this particular dquot was repaired. We still aren't afraid to
659 * brelse it because we have the changes incore.
660 */
661 ASSERT(XFS_BUF_ISBUSY(bp));
662 ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
663 xfs_trans_brelse(tp, bp);
664
665 return (error);
666}
667
668
669/*
670 * allocate an incore dquot from the kernel heap,
671 * and fill its core with quota information kept on disk.
672 * If XFS_QMOPT_DQALLOC is set, it'll allocate a dquot on disk
673 * if it wasn't already allocated.
674 */
675STATIC int
676xfs_qm_idtodq(
677 xfs_mount_t *mp,
678 xfs_dqid_t id, /* gid or uid, depending on type */
679 uint type, /* UDQUOT or GDQUOT */
680 uint flags, /* DQALLOC, DQREPAIR */
681 xfs_dquot_t **O_dqpp)/* OUT : incore dquot, not locked */
682{
683 xfs_dquot_t *dqp;
684 int error;
685 xfs_trans_t *tp;
686 int cancelflags=0;
687
688 dqp = xfs_qm_dqinit(mp, id, type);
689 tp = NULL;
690 if (flags & XFS_QMOPT_DQALLOC) {
691 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC);
692 if ((error = xfs_trans_reserve(tp,
693 XFS_QM_DQALLOC_SPACE_RES(mp),
694 XFS_WRITE_LOG_RES(mp) +
695 BBTOB(XFS_QI_DQCHUNKLEN(mp)) - 1 +
696 128,
697 0,
698 XFS_TRANS_PERM_LOG_RES,
699 XFS_WRITE_LOG_COUNT))) {
700 cancelflags = 0;
701 goto error0;
702 }
703 cancelflags = XFS_TRANS_RELEASE_LOG_RES;
704 }
705
706 /*
707 * Read it from disk; xfs_dqread() takes care of
708 * all the necessary initialization of dquot's fields (locks, etc)
709 */
Tim Shimminefa092f2005-09-05 08:29:01 +1000710 if ((error = xfs_qm_dqread(&tp, id, dqp, flags))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 /*
712 * This can happen if quotas got turned off (ESRCH),
713 * or if the dquot didn't exist on disk and we ask to
714 * allocate (ENOENT).
715 */
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000716 trace_xfs_dqread_fail(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 cancelflags |= XFS_TRANS_ABORT;
718 goto error0;
719 }
720 if (tp) {
Eric Sandeen1c72bf92007-05-08 13:48:42 +1000721 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 goto error1;
723 }
724
725 *O_dqpp = dqp;
726 return (0);
727
728 error0:
729 ASSERT(error);
730 if (tp)
731 xfs_trans_cancel(tp, cancelflags);
732 error1:
733 xfs_qm_dqdestroy(dqp);
734 *O_dqpp = NULL;
735 return (error);
736}
737
738/*
739 * Lookup a dquot in the incore dquot hashtable. We keep two separate
740 * hashtables for user and group dquots; and, these are global tables
741 * inside the XQM, not per-filesystem tables.
742 * The hash chain must be locked by caller, and it is left locked
743 * on return. Returning dquot is locked.
744 */
745STATIC int
746xfs_qm_dqlookup(
747 xfs_mount_t *mp,
748 xfs_dqid_t id,
749 xfs_dqhash_t *qh,
750 xfs_dquot_t **O_dqpp)
751{
752 xfs_dquot_t *dqp;
753 uint flist_locked;
754 xfs_dquot_t *d;
755
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100756 ASSERT(mutex_is_locked(&qh->qh_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
758 flist_locked = B_FALSE;
759
760 /*
761 * Traverse the hashchain looking for a match
762 */
763 for (dqp = qh->qh_next; dqp != NULL; dqp = dqp->HL_NEXT) {
764 /*
765 * We already have the hashlock. We don't need the
766 * dqlock to look at the id field of the dquot, since the
767 * id can't be modified without the hashlock anyway.
768 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100769 if (be32_to_cpu(dqp->q_core.d_id) == id && dqp->q_mount == mp) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000770 trace_xfs_dqlookup_found(dqp);
771
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 /*
773 * All in core dquots must be on the dqlist of mp
774 */
775 ASSERT(dqp->MPL_PREVP != NULL);
776
777 xfs_dqlock(dqp);
778 if (dqp->q_nrefs == 0) {
779 ASSERT (XFS_DQ_IS_ON_FREELIST(dqp));
780 if (! xfs_qm_freelist_lock_nowait(xfs_Gqm)) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000781 trace_xfs_dqlookup_want(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
783 /*
784 * We may have raced with dqreclaim_one()
785 * (and lost). So, flag that we don't
786 * want the dquot to be reclaimed.
787 */
788 dqp->dq_flags |= XFS_DQ_WANT;
789 xfs_dqunlock(dqp);
790 xfs_qm_freelist_lock(xfs_Gqm);
791 xfs_dqlock(dqp);
792 dqp->dq_flags &= ~(XFS_DQ_WANT);
793 }
794 flist_locked = B_TRUE;
795 }
796
797 /*
798 * id couldn't have changed; we had the hashlock all
799 * along
800 */
Christoph Hellwig1149d962005-11-02 15:01:12 +1100801 ASSERT(be32_to_cpu(dqp->q_core.d_id) == id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
803 if (flist_locked) {
804 if (dqp->q_nrefs != 0) {
805 xfs_qm_freelist_unlock(xfs_Gqm);
806 flist_locked = B_FALSE;
807 } else {
808 /*
809 * take it off the freelist
810 */
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000811 trace_xfs_dqlookup_freelist(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 XQM_FREELIST_REMOVE(dqp);
813 /* xfs_qm_freelist_print(&(xfs_Gqm->
814 qm_dqfreelist),
815 "after removal"); */
816 }
817 }
818
819 /*
820 * grab a reference
821 */
822 XFS_DQHOLD(dqp);
823
824 if (flist_locked)
825 xfs_qm_freelist_unlock(xfs_Gqm);
826 /*
827 * move the dquot to the front of the hashchain
828 */
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100829 ASSERT(mutex_is_locked(&qh->qh_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 if (dqp->HL_PREVP != &qh->qh_next) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000831 trace_xfs_dqlookup_move(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 if ((d = dqp->HL_NEXT))
833 d->HL_PREVP = dqp->HL_PREVP;
834 *(dqp->HL_PREVP) = d;
835 d = qh->qh_next;
836 d->HL_PREVP = &dqp->HL_NEXT;
837 dqp->HL_NEXT = d;
838 dqp->HL_PREVP = &qh->qh_next;
839 qh->qh_next = dqp;
840 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000841 trace_xfs_dqlookup_done(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 *O_dqpp = dqp;
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100843 ASSERT(mutex_is_locked(&qh->qh_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 return (0);
845 }
846 }
847
848 *O_dqpp = NULL;
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100849 ASSERT(mutex_is_locked(&qh->qh_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 return (1);
851}
852
853/*
854 * Given the file system, inode OR id, and type (UDQUOT/GDQUOT), return a
855 * a locked dquot, doing an allocation (if requested) as needed.
856 * When both an inode and an id are given, the inode's id takes precedence.
857 * That is, if the id changes while we don't hold the ilock inside this
858 * function, the new dquot is returned, not necessarily the one requested
859 * in the id argument.
860 */
861int
862xfs_qm_dqget(
863 xfs_mount_t *mp,
864 xfs_inode_t *ip, /* locked inode (optional) */
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000865 xfs_dqid_t id, /* uid/projid/gid depending on type */
866 uint type, /* XFS_DQ_USER/XFS_DQ_PROJ/XFS_DQ_GROUP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
868 xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */
869{
870 xfs_dquot_t *dqp;
871 xfs_dqhash_t *h;
872 uint version;
873 int error;
874
875 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
876 if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) ||
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000877 (! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 (! XFS_IS_GQUOTA_ON(mp) && type == XFS_DQ_GROUP)) {
879 return (ESRCH);
880 }
881 h = XFS_DQ_HASH(mp, id, type);
882
883#ifdef DEBUG
884 if (xfs_do_dqerror) {
885 if ((xfs_dqerror_target == mp->m_ddev_targp) &&
886 (xfs_dqreq_num++ % xfs_dqerror_mod) == 0) {
887 cmn_err(CE_DEBUG, "Returning error in dqget");
888 return (EIO);
889 }
890 }
891#endif
892
893 again:
894
895#ifdef DEBUG
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000896 ASSERT(type == XFS_DQ_USER ||
897 type == XFS_DQ_PROJ ||
898 type == XFS_DQ_GROUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 if (ip) {
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000900 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 if (type == XFS_DQ_USER)
902 ASSERT(ip->i_udquot == NULL);
903 else
904 ASSERT(ip->i_gdquot == NULL);
905 }
906#endif
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100907 mutex_lock(&h->qh_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
909 /*
910 * Look in the cache (hashtable).
911 * The chain is kept locked during lookup.
912 */
913 if (xfs_qm_dqlookup(mp, id, h, O_dqpp) == 0) {
914 XQM_STATS_INC(xqmstats.xs_qm_dqcachehits);
915 /*
916 * The dquot was found, moved to the front of the chain,
917 * taken off the freelist if it was on it, and locked
918 * at this point. Just unlock the hashchain and return.
919 */
920 ASSERT(*O_dqpp);
921 ASSERT(XFS_DQ_IS_LOCKED(*O_dqpp));
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100922 mutex_unlock(&h->qh_lock);
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000923 trace_xfs_dqget_hit(*O_dqpp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 return (0); /* success */
925 }
926 XQM_STATS_INC(xqmstats.xs_qm_dqcachemisses);
927
928 /*
929 * Dquot cache miss. We don't want to keep the inode lock across
930 * a (potential) disk read. Also we don't want to deal with the lock
931 * ordering between quotainode and this inode. OTOH, dropping the inode
932 * lock here means dealing with a chown that can happen before
933 * we re-acquire the lock.
934 */
935 if (ip)
936 xfs_iunlock(ip, XFS_ILOCK_EXCL);
937 /*
938 * Save the hashchain version stamp, and unlock the chain, so that
939 * we don't keep the lock across a disk read
940 */
941 version = h->qh_version;
Christoph Hellwigc9a192d2009-02-09 08:47:22 +0100942 mutex_unlock(&h->qh_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
944 /*
945 * Allocate the dquot on the kernel heap, and read the ondisk
946 * portion off the disk. Also, do all the necessary initialization
947 * This can return ENOENT if dquot didn't exist on disk and we didn't
948 * ask it to allocate; ESRCH if quotas got turned off suddenly.
949 */
950 if ((error = xfs_qm_idtodq(mp, id, type,
951 flags & (XFS_QMOPT_DQALLOC|XFS_QMOPT_DQREPAIR|
952 XFS_QMOPT_DOWARN),
953 &dqp))) {
954 if (ip)
955 xfs_ilock(ip, XFS_ILOCK_EXCL);
956 return (error);
957 }
958
959 /*
960 * See if this is mount code calling to look at the overall quota limits
961 * which are stored in the id == 0 user or group's dquot.
962 * Since we may not have done a quotacheck by this point, just return
963 * the dquot without attaching it to any hashtables, lists, etc, or even
964 * taking a reference.
965 * The caller must dqdestroy this once done.
966 */
967 if (flags & XFS_QMOPT_DQSUSER) {
968 ASSERT(id == 0);
969 ASSERT(! ip);
970 goto dqret;
971 }
972
973 /*
974 * Dquot lock comes after hashlock in the lock ordering
975 */
976 if (ip) {
977 xfs_ilock(ip, XFS_ILOCK_EXCL);
978 if (! XFS_IS_DQTYPE_ON(mp, type)) {
979 /* inode stays locked on return */
980 xfs_qm_dqdestroy(dqp);
981 return XFS_ERROR(ESRCH);
982 }
983 /*
984 * A dquot could be attached to this inode by now, since
985 * we had dropped the ilock.
986 */
987 if (type == XFS_DQ_USER) {
988 if (ip->i_udquot) {
989 xfs_qm_dqdestroy(dqp);
990 dqp = ip->i_udquot;
991 xfs_dqlock(dqp);
992 goto dqret;
993 }
994 } else {
995 if (ip->i_gdquot) {
996 xfs_qm_dqdestroy(dqp);
997 dqp = ip->i_gdquot;
998 xfs_dqlock(dqp);
999 goto dqret;
1000 }
1001 }
1002 }
1003
1004 /*
1005 * Hashlock comes after ilock in lock order
1006 */
Christoph Hellwigc9a192d2009-02-09 08:47:22 +01001007 mutex_lock(&h->qh_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 if (version != h->qh_version) {
1009 xfs_dquot_t *tmpdqp;
1010 /*
1011 * Now, see if somebody else put the dquot in the
1012 * hashtable before us. This can happen because we didn't
1013 * keep the hashchain lock. We don't have to worry about
1014 * lock order between the two dquots here since dqp isn't
1015 * on any findable lists yet.
1016 */
1017 if (xfs_qm_dqlookup(mp, id, h, &tmpdqp) == 0) {
1018 /*
1019 * Duplicate found. Just throw away the new dquot
1020 * and start over.
1021 */
1022 xfs_qm_dqput(tmpdqp);
Christoph Hellwigc9a192d2009-02-09 08:47:22 +01001023 mutex_unlock(&h->qh_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 xfs_qm_dqdestroy(dqp);
1025 XQM_STATS_INC(xqmstats.xs_qm_dquot_dups);
1026 goto again;
1027 }
1028 }
1029
1030 /*
1031 * Put the dquot at the beginning of the hash-chain and mp's list
1032 * LOCK ORDER: hashlock, freelistlock, mplistlock, udqlock, gdqlock ..
1033 */
Christoph Hellwigc9a192d2009-02-09 08:47:22 +01001034 ASSERT(mutex_is_locked(&h->qh_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 dqp->q_hash = h;
1036 XQM_HASHLIST_INSERT(h, dqp);
1037
1038 /*
1039 * Attach this dquot to this filesystem's list of all dquots,
1040 * kept inside the mount structure in m_quotainfo field
1041 */
1042 xfs_qm_mplist_lock(mp);
1043
1044 /*
1045 * We return a locked dquot to the caller, with a reference taken
1046 */
1047 xfs_dqlock(dqp);
1048 dqp->q_nrefs = 1;
1049
1050 XQM_MPLIST_INSERT(&(XFS_QI_MPL_LIST(mp)), dqp);
1051
1052 xfs_qm_mplist_unlock(mp);
Christoph Hellwigc9a192d2009-02-09 08:47:22 +01001053 mutex_unlock(&h->qh_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 dqret:
Christoph Hellwig579aa9c2008-04-22 17:34:00 +10001055 ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001056 trace_xfs_dqget_miss(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 *O_dqpp = dqp;
1058 return (0);
1059}
1060
1061
1062/*
1063 * Release a reference to the dquot (decrement ref-count)
1064 * and unlock it. If there is a group quota attached to this
1065 * dquot, carefully release that too without tripping over
1066 * deadlocks'n'stuff.
1067 */
1068void
1069xfs_qm_dqput(
1070 xfs_dquot_t *dqp)
1071{
1072 xfs_dquot_t *gdqp;
1073
1074 ASSERT(dqp->q_nrefs > 0);
1075 ASSERT(XFS_DQ_IS_LOCKED(dqp));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001076
1077 trace_xfs_dqput(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078
1079 if (dqp->q_nrefs != 1) {
1080 dqp->q_nrefs--;
1081 xfs_dqunlock(dqp);
1082 return;
1083 }
1084
1085 /*
1086 * drop the dqlock and acquire the freelist and dqlock
1087 * in the right order; but try to get it out-of-order first
1088 */
1089 if (! xfs_qm_freelist_lock_nowait(xfs_Gqm)) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001090 trace_xfs_dqput_wait(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 xfs_dqunlock(dqp);
1092 xfs_qm_freelist_lock(xfs_Gqm);
1093 xfs_dqlock(dqp);
1094 }
1095
1096 while (1) {
1097 gdqp = NULL;
1098
1099 /* We can't depend on nrefs being == 1 here */
1100 if (--dqp->q_nrefs == 0) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001101 trace_xfs_dqput_free(dqp);
1102
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 /*
1104 * insert at end of the freelist.
1105 */
1106 XQM_FREELIST_INSERT(&(xfs_Gqm->qm_dqfreelist), dqp);
1107
1108 /*
1109 * If we just added a udquot to the freelist, then
1110 * we want to release the gdquot reference that
1111 * it (probably) has. Otherwise it'll keep the
1112 * gdquot from getting reclaimed.
1113 */
1114 if ((gdqp = dqp->q_gdquot)) {
1115 /*
1116 * Avoid a recursive dqput call
1117 */
1118 xfs_dqlock(gdqp);
1119 dqp->q_gdquot = NULL;
1120 }
1121
1122 /* xfs_qm_freelist_print(&(xfs_Gqm->qm_dqfreelist),
1123 "@@@@@++ Free list (after append) @@@@@+");
1124 */
1125 }
1126 xfs_dqunlock(dqp);
1127
1128 /*
1129 * If we had a group quota inside the user quota as a hint,
1130 * release it now.
1131 */
1132 if (! gdqp)
1133 break;
1134 dqp = gdqp;
1135 }
1136 xfs_qm_freelist_unlock(xfs_Gqm);
1137}
1138
1139/*
1140 * Release a dquot. Flush it if dirty, then dqput() it.
1141 * dquot must not be locked.
1142 */
1143void
1144xfs_qm_dqrele(
1145 xfs_dquot_t *dqp)
1146{
Christoph Hellwig7d095252009-06-08 15:33:32 +02001147 if (!dqp)
1148 return;
1149
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001150 trace_xfs_dqrele(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
1152 xfs_dqlock(dqp);
1153 /*
1154 * We don't care to flush it if the dquot is dirty here.
1155 * That will create stutters that we want to avoid.
1156 * Instead we do a delayed write when we try to reclaim
1157 * a dirty dquot. Also xfs_sync will take part of the burden...
1158 */
1159 xfs_qm_dqput(dqp);
1160}
1161
1162
1163/*
1164 * Write a modified dquot to disk.
1165 * The dquot must be locked and the flush lock too taken by caller.
1166 * The flush lock will not be unlocked until the dquot reaches the disk,
1167 * but the dquot is free to be unlocked and modified by the caller
1168 * in the interim. Dquot is still locked on return. This behavior is
1169 * identical to that of inodes.
1170 */
1171int
1172xfs_qm_dqflush(
1173 xfs_dquot_t *dqp,
1174 uint flags)
1175{
1176 xfs_mount_t *mp;
1177 xfs_buf_t *bp;
1178 xfs_disk_dquot_t *ddqp;
1179 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180
1181 ASSERT(XFS_DQ_IS_LOCKED(dqp));
David Chinnere1f49cf2008-08-13 16:41:43 +10001182 ASSERT(!completion_done(&dqp->q_flush));
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001183 trace_xfs_dqflush(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184
1185 /*
David Chinner2f8a3ce2008-10-30 17:07:20 +11001186 * If not dirty, or it's pinned and we are not supposed to
1187 * block, nada.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 */
David Chinner2f8a3ce2008-10-30 17:07:20 +11001189 if (!XFS_DQ_IS_DIRTY(dqp) ||
1190 (!(flags & XFS_QMOPT_SYNC) && atomic_read(&dqp->q_pincount) > 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 xfs_dqfunlock(dqp);
David Chinner2f8a3ce2008-10-30 17:07:20 +11001192 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 xfs_qm_dqunpin_wait(dqp);
1195
1196 /*
1197 * This may have been unpinned because the filesystem is shutting
1198 * down forcibly. If that's the case we must not write this dquot
1199 * to disk, because the log record didn't make it to disk!
1200 */
1201 if (XFS_FORCED_SHUTDOWN(dqp->q_mount)) {
1202 dqp->dq_flags &= ~(XFS_DQ_DIRTY);
1203 xfs_dqfunlock(dqp);
1204 return XFS_ERROR(EIO);
1205 }
1206
1207 /*
1208 * Get the buffer containing the on-disk dquot
1209 * We don't need a transaction envelope because we know that the
1210 * the ondisk-dquot has already been allocated for.
1211 */
1212 if ((error = xfs_qm_dqtobp(NULL, dqp, &ddqp, &bp, XFS_QMOPT_DOWARN))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 ASSERT(error != ENOENT);
1214 /*
1215 * Quotas could have gotten turned off (ESRCH)
1216 */
1217 xfs_dqfunlock(dqp);
1218 return (error);
1219 }
1220
Christoph Hellwig1149d962005-11-02 15:01:12 +11001221 if (xfs_qm_dqcheck(&dqp->q_core, be32_to_cpu(ddqp->d_id),
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001222 0, XFS_QMOPT_DOWARN, "dqflush (incore copy)")) {
Nathan Scott7d04a332006-06-09 14:58:38 +10001223 xfs_force_shutdown(dqp->q_mount, SHUTDOWN_CORRUPT_INCORE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 return XFS_ERROR(EIO);
1225 }
1226
1227 /* This is the only portion of data that needs to persist */
1228 memcpy(ddqp, &(dqp->q_core), sizeof(xfs_disk_dquot_t));
1229
1230 /*
1231 * Clear the dirty field and remember the flush lsn for later use.
1232 */
1233 dqp->dq_flags &= ~(XFS_DQ_DIRTY);
1234 mp = dqp->q_mount;
1235
David Chinner7b2e2a32008-10-30 17:39:12 +11001236 xfs_trans_ail_copy_lsn(mp->m_ail, &dqp->q_logitem.qli_flush_lsn,
1237 &dqp->q_logitem.qli_item.li_lsn);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
1239 /*
1240 * Attach an iodone routine so that we can remove this dquot from the
1241 * AIL and release the flush lock once the dquot is synced to disk.
1242 */
1243 xfs_buf_attach_iodone(bp, (void(*)(xfs_buf_t *, xfs_log_item_t *))
1244 xfs_qm_dqflush_done, &(dqp->q_logitem.qli_item));
1245 /*
1246 * If the buffer is pinned then push on the log so we won't
1247 * get stuck waiting in the write for too long.
1248 */
1249 if (XFS_BUF_ISPINNED(bp)) {
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001250 trace_xfs_dqflush_force(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
1252 }
1253
1254 if (flags & XFS_QMOPT_DELWRI) {
1255 xfs_bdwrite(mp, bp);
1256 } else if (flags & XFS_QMOPT_ASYNC) {
David Chinnerdb7a19f2008-04-10 12:22:24 +10001257 error = xfs_bawrite(mp, bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 } else {
1259 error = xfs_bwrite(mp, bp);
1260 }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001261
1262 trace_xfs_dqflush_done(dqp);
1263
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 /*
1265 * dqp is still locked, but caller is free to unlock it now.
1266 */
1267 return (error);
1268
1269}
1270
1271/*
1272 * This is the dquot flushing I/O completion routine. It is called
1273 * from interrupt level when the buffer containing the dquot is
1274 * flushed to disk. It is responsible for removing the dquot logitem
1275 * from the AIL if it has not been re-logged, and unlocking the dquot's
1276 * flush lock. This behavior is very similar to that of inodes..
1277 */
1278/*ARGSUSED*/
1279STATIC void
1280xfs_qm_dqflush_done(
1281 xfs_buf_t *bp,
1282 xfs_dq_logitem_t *qip)
1283{
1284 xfs_dquot_t *dqp;
David Chinner783a2f62008-10-30 17:39:58 +11001285 struct xfs_ail *ailp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286
1287 dqp = qip->qli_dquot;
David Chinner783a2f62008-10-30 17:39:58 +11001288 ailp = qip->qli_item.li_ailp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289
1290 /*
1291 * We only want to pull the item from the AIL if its
1292 * location in the log has not changed since we started the flush.
1293 * Thus, we only bother if the dquot's lsn has
1294 * not changed. First we check the lsn outside the lock
1295 * since it's cheaper, and then we recheck while
1296 * holding the lock before removing the dquot from the AIL.
1297 */
1298 if ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
1299 qip->qli_item.li_lsn == qip->qli_flush_lsn) {
1300
David Chinner783a2f62008-10-30 17:39:58 +11001301 /* xfs_trans_ail_delete() drops the AIL lock. */
1302 spin_lock(&ailp->xa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 if (qip->qli_item.li_lsn == qip->qli_flush_lsn)
David Chinner783a2f62008-10-30 17:39:58 +11001304 xfs_trans_ail_delete(ailp, (xfs_log_item_t*)qip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 else
David Chinner783a2f62008-10-30 17:39:58 +11001306 spin_unlock(&ailp->xa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 }
1308
1309 /*
1310 * Release the dq's flush lock since we're done with it.
1311 */
1312 xfs_dqfunlock(dqp);
1313}
1314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315int
1316xfs_qm_dqlock_nowait(
1317 xfs_dquot_t *dqp)
1318{
David Chinnere1f49cf2008-08-13 16:41:43 +10001319 return mutex_trylock(&dqp->q_qlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320}
1321
1322void
1323xfs_dqlock(
1324 xfs_dquot_t *dqp)
1325{
David Chinnere1f49cf2008-08-13 16:41:43 +10001326 mutex_lock(&dqp->q_qlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327}
1328
1329void
1330xfs_dqunlock(
1331 xfs_dquot_t *dqp)
1332{
1333 mutex_unlock(&(dqp->q_qlock));
1334 if (dqp->q_logitem.qli_dquot == dqp) {
1335 /* Once was dqp->q_mount, but might just have been cleared */
David Chinner783a2f62008-10-30 17:39:58 +11001336 xfs_trans_unlocked_item(dqp->q_logitem.qli_item.li_ailp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 (xfs_log_item_t*)&(dqp->q_logitem));
1338 }
1339}
1340
1341
1342void
1343xfs_dqunlock_nonotify(
1344 xfs_dquot_t *dqp)
1345{
1346 mutex_unlock(&(dqp->q_qlock));
1347}
1348
Christoph Hellwig5bb87a32009-01-19 02:03:19 +01001349/*
1350 * Lock two xfs_dquot structures.
1351 *
1352 * To avoid deadlocks we always lock the quota structure with
1353 * the lowerd id first.
1354 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355void
1356xfs_dqlock2(
1357 xfs_dquot_t *d1,
1358 xfs_dquot_t *d2)
1359{
1360 if (d1 && d2) {
1361 ASSERT(d1 != d2);
Christoph Hellwig1149d962005-11-02 15:01:12 +11001362 if (be32_to_cpu(d1->q_core.d_id) >
1363 be32_to_cpu(d2->q_core.d_id)) {
Christoph Hellwig5bb87a32009-01-19 02:03:19 +01001364 mutex_lock(&d2->q_qlock);
1365 mutex_lock_nested(&d1->q_qlock, XFS_QLOCK_NESTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 } else {
Christoph Hellwig5bb87a32009-01-19 02:03:19 +01001367 mutex_lock(&d1->q_qlock);
1368 mutex_lock_nested(&d2->q_qlock, XFS_QLOCK_NESTED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 }
Christoph Hellwig5bb87a32009-01-19 02:03:19 +01001370 } else if (d1) {
1371 mutex_lock(&d1->q_qlock);
1372 } else if (d2) {
1373 mutex_lock(&d2->q_qlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 }
1375}
1376
1377
1378/*
1379 * Take a dquot out of the mount's dqlist as well as the hashlist.
1380 * This is called via unmount as well as quotaoff, and the purge
1381 * will always succeed unless there are soft (temp) references
1382 * outstanding.
1383 *
1384 * This returns 0 if it was purged, 1 if it wasn't. It's not an error code
1385 * that we're returning! XXXsup - not cool.
1386 */
1387/* ARGSUSED */
1388int
1389xfs_qm_dqpurge(
Denys Vlasenko4f0e8a92008-05-19 16:34:04 +10001390 xfs_dquot_t *dqp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391{
1392 xfs_dqhash_t *thishash;
David Chinner3c568362008-04-10 12:20:24 +10001393 xfs_mount_t *mp = dqp->q_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394
1395 ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
Christoph Hellwigc9a192d2009-02-09 08:47:22 +01001396 ASSERT(mutex_is_locked(&dqp->q_hash->qh_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397
1398 xfs_dqlock(dqp);
1399 /*
1400 * We really can't afford to purge a dquot that is
1401 * referenced, because these are hard refs.
1402 * It shouldn't happen in general because we went thru _all_ inodes in
1403 * dqrele_all_inodes before calling this and didn't let the mountlock go.
1404 * However it is possible that we have dquots with temporary
1405 * references that are not attached to an inode. e.g. see xfs_setattr().
1406 */
1407 if (dqp->q_nrefs != 0) {
1408 xfs_dqunlock(dqp);
Christoph Hellwigc9a192d2009-02-09 08:47:22 +01001409 mutex_unlock(&dqp->q_hash->qh_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 return (1);
1411 }
1412
1413 ASSERT(XFS_DQ_IS_ON_FREELIST(dqp));
1414
1415 /*
1416 * If we're turning off quotas, we have to make sure that, for
1417 * example, we don't delete quota disk blocks while dquots are
1418 * in the process of getting written to those disk blocks.
1419 * This dquot might well be on AIL, and we can't leave it there
1420 * if we're turning off quotas. Basically, we need this flush
1421 * lock, and are willing to block on it.
1422 */
David Chinnere1f49cf2008-08-13 16:41:43 +10001423 if (!xfs_dqflock_nowait(dqp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 /*
1425 * Block on the flush lock after nudging dquot buffer,
1426 * if it is incore.
1427 */
1428 xfs_qm_dqflock_pushbuf_wait(dqp);
1429 }
1430
1431 /*
1432 * XXXIf we're turning this type of quotas off, we don't care
1433 * about the dirty metadata sitting in this dquot. OTOH, if
1434 * we're unmounting, we do care, so we flush it and wait.
1435 */
1436 if (XFS_DQ_IS_DIRTY(dqp)) {
David Chinner3c568362008-04-10 12:20:24 +10001437 int error;
Christoph Hellwig0b1b2132009-12-14 23:14:59 +00001438
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 /* dqflush unlocks dqflock */
1440 /*
1441 * Given that dqpurge is a very rare occurrence, it is OK
1442 * that we're holding the hashlist and mplist locks
1443 * across the disk write. But, ... XXXsup
1444 *
1445 * We don't care about getting disk errors here. We need
1446 * to purge this dquot anyway, so we go ahead regardless.
1447 */
David Chinner3c568362008-04-10 12:20:24 +10001448 error = xfs_qm_dqflush(dqp, XFS_QMOPT_SYNC);
1449 if (error)
1450 xfs_fs_cmn_err(CE_WARN, mp,
1451 "xfs_qm_dqpurge: dquot %p flush failed", dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 xfs_dqflock(dqp);
1453 }
Peter Leckiebc3048e2008-10-30 17:05:04 +11001454 ASSERT(atomic_read(&dqp->q_pincount) == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
1456 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
1457
1458 thishash = dqp->q_hash;
1459 XQM_HASHLIST_REMOVE(thishash, dqp);
1460 XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(mp)), dqp);
1461 /*
1462 * XXX Move this to the front of the freelist, if we can get the
1463 * freelist lock.
1464 */
1465 ASSERT(XFS_DQ_IS_ON_FREELIST(dqp));
1466
1467 dqp->q_mount = NULL;
1468 dqp->q_hash = NULL;
1469 dqp->dq_flags = XFS_DQ_INACTIVE;
1470 memset(&dqp->q_core, 0, sizeof(dqp->q_core));
1471 xfs_dqfunlock(dqp);
1472 xfs_dqunlock(dqp);
Christoph Hellwigc9a192d2009-02-09 08:47:22 +01001473 mutex_unlock(&thishash->qh_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 return (0);
1475}
1476
1477
1478#ifdef QUOTADEBUG
1479void
1480xfs_qm_dqprint(xfs_dquot_t *dqp)
1481{
1482 cmn_err(CE_DEBUG, "-----------KERNEL DQUOT----------------");
1483 cmn_err(CE_DEBUG, "---- dquotID = %d",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001484 (int)be32_to_cpu(dqp->q_core.d_id));
Nathan Scottc8ad20f2005-06-21 15:38:48 +10001485 cmn_err(CE_DEBUG, "---- type = %s", DQFLAGTO_TYPESTR(dqp));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 cmn_err(CE_DEBUG, "---- fs = 0x%p", dqp->q_mount);
1487 cmn_err(CE_DEBUG, "---- blkno = 0x%x", (int) dqp->q_blkno);
1488 cmn_err(CE_DEBUG, "---- boffset = 0x%x", (int) dqp->q_bufoffset);
1489 cmn_err(CE_DEBUG, "---- blkhlimit = %Lu (0x%x)",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001490 be64_to_cpu(dqp->q_core.d_blk_hardlimit),
1491 (int)be64_to_cpu(dqp->q_core.d_blk_hardlimit));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 cmn_err(CE_DEBUG, "---- blkslimit = %Lu (0x%x)",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001493 be64_to_cpu(dqp->q_core.d_blk_softlimit),
1494 (int)be64_to_cpu(dqp->q_core.d_blk_softlimit));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 cmn_err(CE_DEBUG, "---- inohlimit = %Lu (0x%x)",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001496 be64_to_cpu(dqp->q_core.d_ino_hardlimit),
1497 (int)be64_to_cpu(dqp->q_core.d_ino_hardlimit));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 cmn_err(CE_DEBUG, "---- inoslimit = %Lu (0x%x)",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001499 be64_to_cpu(dqp->q_core.d_ino_softlimit),
1500 (int)be64_to_cpu(dqp->q_core.d_ino_softlimit));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501 cmn_err(CE_DEBUG, "---- bcount = %Lu (0x%x)",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001502 be64_to_cpu(dqp->q_core.d_bcount),
1503 (int)be64_to_cpu(dqp->q_core.d_bcount));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 cmn_err(CE_DEBUG, "---- icount = %Lu (0x%x)",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001505 be64_to_cpu(dqp->q_core.d_icount),
1506 (int)be64_to_cpu(dqp->q_core.d_icount));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 cmn_err(CE_DEBUG, "---- btimer = %d",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001508 (int)be32_to_cpu(dqp->q_core.d_btimer));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509 cmn_err(CE_DEBUG, "---- itimer = %d",
Christoph Hellwig1149d962005-11-02 15:01:12 +11001510 (int)be32_to_cpu(dqp->q_core.d_itimer));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 cmn_err(CE_DEBUG, "---------------------------");
1512}
1513#endif
1514
1515/*
1516 * Give the buffer a little push if it is incore and
1517 * wait on the flush lock.
1518 */
1519void
1520xfs_qm_dqflock_pushbuf_wait(
1521 xfs_dquot_t *dqp)
1522{
1523 xfs_buf_t *bp;
1524
1525 /*
1526 * Check to see if the dquot has been flushed delayed
1527 * write. If so, grab its buffer and send it
1528 * out immediately. We'll be able to acquire
1529 * the flush lock when the I/O completes.
1530 */
1531 bp = xfs_incore(dqp->q_mount->m_ddev_targp, dqp->q_blkno,
1532 XFS_QI_DQCHUNKLEN(dqp->q_mount),
1533 XFS_INCORE_TRYLOCK);
1534 if (bp != NULL) {
1535 if (XFS_BUF_ISDELAYWRITE(bp)) {
David Chinnerdb7a19f2008-04-10 12:22:24 +10001536 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537 if (XFS_BUF_ISPINNED(bp)) {
1538 xfs_log_force(dqp->q_mount,
1539 (xfs_lsn_t)0,
1540 XFS_LOG_FORCE);
1541 }
David Chinnerdb7a19f2008-04-10 12:22:24 +10001542 error = xfs_bawrite(dqp->q_mount, bp);
1543 if (error)
1544 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
1545 "xfs_qm_dqflock_pushbuf_wait: "
1546 "pushbuf error %d on dqp %p, bp %p",
1547 error, dqp, bp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 } else {
1549 xfs_buf_relse(bp);
1550 }
1551 }
1552 xfs_dqflock(dqp);
1553}