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Commit | Line | Data |
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1da177e4 | 1 | /* |
4ce3121f NS |
2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
4ce3121f NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
4ce3121f NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
4ce3121f NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 LT |
18 | #include "xfs.h" |
19 | #include "xfs_fs.h" | |
a844f451 | 20 | #include "xfs_bit.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_sb.h" | |
25 | #include "xfs_ag.h" | |
1da177e4 | 26 | #include "xfs_alloc.h" |
1da177e4 LT |
27 | #include "xfs_quota.h" |
28 | #include "xfs_mount.h" | |
1da177e4 | 29 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
30 | #include "xfs_inode.h" |
31 | #include "xfs_bmap.h" | |
1da177e4 LT |
32 | #include "xfs_rtalloc.h" |
33 | #include "xfs_error.h" | |
34 | #include "xfs_itable.h" | |
1da177e4 LT |
35 | #include "xfs_attr.h" |
36 | #include "xfs_buf_item.h" | |
37 | #include "xfs_trans_space.h" | |
38 | #include "xfs_trans_priv.h" | |
1da177e4 | 39 | #include "xfs_qm.h" |
0b1b213f | 40 | #include "xfs_trace.h" |
1da177e4 LT |
41 | |
42 | ||
43 | /* | |
44 | LOCK ORDER | |
45 | ||
46 | inode lock (ilock) | |
47 | dquot hash-chain lock (hashlock) | |
48 | xqm dquot freelist lock (freelistlock | |
49 | mount's dquot list lock (mplistlock) | |
50 | user dquot lock - lock ordering among dquots is based on the uid or gid | |
51 | group dquot lock - similar to udquots. Between the two dquots, the udquot | |
52 | has to be locked first. | |
53 | pin lock - the dquot lock must be held to take this lock. | |
54 | flush lock - ditto. | |
55 | */ | |
56 | ||
1da177e4 LT |
57 | #ifdef DEBUG |
58 | xfs_buftarg_t *xfs_dqerror_target; | |
59 | int xfs_do_dqerror; | |
60 | int xfs_dqreq_num; | |
61 | int xfs_dqerror_mod = 33; | |
62 | #endif | |
63 | ||
98b8c7a0 CH |
64 | static struct lock_class_key xfs_dquot_other_class; |
65 | ||
1da177e4 LT |
66 | /* |
67 | * Allocate and initialize a dquot. We don't always allocate fresh memory; | |
68 | * we try to reclaim a free dquot if the number of incore dquots are above | |
69 | * a threshold. | |
70 | * The only field inside the core that gets initialized at this point | |
71 | * is the d_id field. The idea is to fill in the entire q_core | |
72 | * when we read in the on disk dquot. | |
73 | */ | |
ba0f32d4 | 74 | STATIC xfs_dquot_t * |
1da177e4 LT |
75 | xfs_qm_dqinit( |
76 | xfs_mount_t *mp, | |
77 | xfs_dqid_t id, | |
78 | uint type) | |
79 | { | |
80 | xfs_dquot_t *dqp; | |
81 | boolean_t brandnewdquot; | |
82 | ||
83 | brandnewdquot = xfs_qm_dqalloc_incore(&dqp); | |
84 | dqp->dq_flags = type; | |
1149d96a | 85 | dqp->q_core.d_id = cpu_to_be32(id); |
1da177e4 LT |
86 | dqp->q_mount = mp; |
87 | ||
88 | /* | |
89 | * No need to re-initialize these if this is a reclaimed dquot. | |
90 | */ | |
91 | if (brandnewdquot) { | |
3a8406f6 | 92 | INIT_LIST_HEAD(&dqp->q_freelist); |
794ee1ba | 93 | mutex_init(&dqp->q_qlock); |
bc3048e3 | 94 | init_waitqueue_head(&dqp->q_pinwait); |
1da177e4 | 95 | |
e1f49cf2 DC |
96 | /* |
97 | * Because we want to use a counting completion, complete | |
98 | * the flush completion once to allow a single access to | |
99 | * the flush completion without blocking. | |
100 | */ | |
101 | init_completion(&dqp->q_flush); | |
102 | complete(&dqp->q_flush); | |
103 | ||
0b1b213f | 104 | trace_xfs_dqinit(dqp); |
1da177e4 LT |
105 | } else { |
106 | /* | |
107 | * Only the q_core portion was zeroed in dqreclaim_one(). | |
108 | * So, we need to reset others. | |
109 | */ | |
3a8406f6 DC |
110 | dqp->q_nrefs = 0; |
111 | dqp->q_blkno = 0; | |
112 | INIT_LIST_HEAD(&dqp->q_mplist); | |
113 | INIT_LIST_HEAD(&dqp->q_hashlist); | |
114 | dqp->q_bufoffset = 0; | |
115 | dqp->q_fileoffset = 0; | |
116 | dqp->q_transp = NULL; | |
117 | dqp->q_gdquot = NULL; | |
118 | dqp->q_res_bcount = 0; | |
119 | dqp->q_res_icount = 0; | |
120 | dqp->q_res_rtbcount = 0; | |
121 | atomic_set(&dqp->q_pincount, 0); | |
122 | dqp->q_hash = NULL; | |
123 | ASSERT(list_empty(&dqp->q_freelist)); | |
1da177e4 | 124 | |
0b1b213f | 125 | trace_xfs_dqreuse(dqp); |
98b8c7a0 CH |
126 | } |
127 | ||
128 | /* | |
129 | * In either case we need to make sure group quotas have a different | |
130 | * lock class than user quotas, to make sure lockdep knows we can | |
131 | * locks of one of each at the same time. | |
132 | */ | |
133 | if (!(type & XFS_DQ_USER)) | |
134 | lockdep_set_class(&dqp->q_qlock, &xfs_dquot_other_class); | |
1da177e4 LT |
135 | |
136 | /* | |
137 | * log item gets initialized later | |
138 | */ | |
139 | return (dqp); | |
140 | } | |
141 | ||
142 | /* | |
143 | * This is called to free all the memory associated with a dquot | |
144 | */ | |
145 | void | |
146 | xfs_qm_dqdestroy( | |
147 | xfs_dquot_t *dqp) | |
148 | { | |
3a8406f6 | 149 | ASSERT(list_empty(&dqp->q_freelist)); |
1da177e4 LT |
150 | |
151 | mutex_destroy(&dqp->q_qlock); | |
1da177e4 | 152 | sv_destroy(&dqp->q_pinwait); |
1da177e4 | 153 | kmem_zone_free(xfs_Gqm->qm_dqzone, dqp); |
0b1b213f | 154 | |
1da177e4 LT |
155 | atomic_dec(&xfs_Gqm->qm_totaldquots); |
156 | } | |
157 | ||
158 | /* | |
159 | * This is what a 'fresh' dquot inside a dquot chunk looks like on disk. | |
160 | */ | |
161 | STATIC void | |
162 | xfs_qm_dqinit_core( | |
163 | xfs_dqid_t id, | |
164 | uint type, | |
165 | xfs_dqblk_t *d) | |
166 | { | |
167 | /* | |
168 | * Caller has zero'd the entire dquot 'chunk' already. | |
169 | */ | |
1149d96a CH |
170 | d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC); |
171 | d->dd_diskdq.d_version = XFS_DQUOT_VERSION; | |
172 | d->dd_diskdq.d_id = cpu_to_be32(id); | |
173 | d->dd_diskdq.d_flags = type; | |
1da177e4 LT |
174 | } |
175 | ||
1da177e4 LT |
176 | /* |
177 | * If default limits are in force, push them into the dquot now. | |
178 | * We overwrite the dquot limits only if they are zero and this | |
179 | * is not the root dquot. | |
180 | */ | |
181 | void | |
182 | xfs_qm_adjust_dqlimits( | |
183 | xfs_mount_t *mp, | |
184 | xfs_disk_dquot_t *d) | |
185 | { | |
186 | xfs_quotainfo_t *q = mp->m_quotainfo; | |
187 | ||
188 | ASSERT(d->d_id); | |
189 | ||
190 | if (q->qi_bsoftlimit && !d->d_blk_softlimit) | |
1149d96a | 191 | d->d_blk_softlimit = cpu_to_be64(q->qi_bsoftlimit); |
1da177e4 | 192 | if (q->qi_bhardlimit && !d->d_blk_hardlimit) |
1149d96a | 193 | d->d_blk_hardlimit = cpu_to_be64(q->qi_bhardlimit); |
1da177e4 | 194 | if (q->qi_isoftlimit && !d->d_ino_softlimit) |
1149d96a | 195 | d->d_ino_softlimit = cpu_to_be64(q->qi_isoftlimit); |
1da177e4 | 196 | if (q->qi_ihardlimit && !d->d_ino_hardlimit) |
1149d96a | 197 | d->d_ino_hardlimit = cpu_to_be64(q->qi_ihardlimit); |
1da177e4 | 198 | if (q->qi_rtbsoftlimit && !d->d_rtb_softlimit) |
1149d96a | 199 | d->d_rtb_softlimit = cpu_to_be64(q->qi_rtbsoftlimit); |
1da177e4 | 200 | if (q->qi_rtbhardlimit && !d->d_rtb_hardlimit) |
1149d96a | 201 | d->d_rtb_hardlimit = cpu_to_be64(q->qi_rtbhardlimit); |
1da177e4 LT |
202 | } |
203 | ||
204 | /* | |
205 | * Check the limits and timers of a dquot and start or reset timers | |
206 | * if necessary. | |
207 | * This gets called even when quota enforcement is OFF, which makes our | |
208 | * life a little less complicated. (We just don't reject any quota | |
209 | * reservations in that case, when enforcement is off). | |
210 | * We also return 0 as the values of the timers in Q_GETQUOTA calls, when | |
211 | * enforcement's off. | |
212 | * In contrast, warnings are a little different in that they don't | |
754002b4 NS |
213 | * 'automatically' get started when limits get exceeded. They do |
214 | * get reset to zero, however, when we find the count to be under | |
215 | * the soft limit (they are only ever set non-zero via userspace). | |
1da177e4 LT |
216 | */ |
217 | void | |
218 | xfs_qm_adjust_dqtimers( | |
219 | xfs_mount_t *mp, | |
220 | xfs_disk_dquot_t *d) | |
221 | { | |
222 | ASSERT(d->d_id); | |
223 | ||
224 | #ifdef QUOTADEBUG | |
1149d96a CH |
225 | if (d->d_blk_hardlimit) |
226 | ASSERT(be64_to_cpu(d->d_blk_softlimit) <= | |
227 | be64_to_cpu(d->d_blk_hardlimit)); | |
228 | if (d->d_ino_hardlimit) | |
229 | ASSERT(be64_to_cpu(d->d_ino_softlimit) <= | |
230 | be64_to_cpu(d->d_ino_hardlimit)); | |
231 | if (d->d_rtb_hardlimit) | |
232 | ASSERT(be64_to_cpu(d->d_rtb_softlimit) <= | |
233 | be64_to_cpu(d->d_rtb_hardlimit)); | |
1da177e4 LT |
234 | #endif |
235 | if (!d->d_btimer) { | |
1149d96a CH |
236 | if ((d->d_blk_softlimit && |
237 | (be64_to_cpu(d->d_bcount) >= | |
238 | be64_to_cpu(d->d_blk_softlimit))) || | |
239 | (d->d_blk_hardlimit && | |
240 | (be64_to_cpu(d->d_bcount) >= | |
241 | be64_to_cpu(d->d_blk_hardlimit)))) { | |
242 | d->d_btimer = cpu_to_be32(get_seconds() + | |
8a7b8a89 | 243 | mp->m_quotainfo->qi_btimelimit); |
754002b4 NS |
244 | } else { |
245 | d->d_bwarns = 0; | |
1da177e4 LT |
246 | } |
247 | } else { | |
248 | if ((!d->d_blk_softlimit || | |
1149d96a CH |
249 | (be64_to_cpu(d->d_bcount) < |
250 | be64_to_cpu(d->d_blk_softlimit))) && | |
1da177e4 | 251 | (!d->d_blk_hardlimit || |
1149d96a CH |
252 | (be64_to_cpu(d->d_bcount) < |
253 | be64_to_cpu(d->d_blk_hardlimit)))) { | |
1da177e4 LT |
254 | d->d_btimer = 0; |
255 | } | |
256 | } | |
257 | ||
258 | if (!d->d_itimer) { | |
1149d96a CH |
259 | if ((d->d_ino_softlimit && |
260 | (be64_to_cpu(d->d_icount) >= | |
261 | be64_to_cpu(d->d_ino_softlimit))) || | |
262 | (d->d_ino_hardlimit && | |
263 | (be64_to_cpu(d->d_icount) >= | |
264 | be64_to_cpu(d->d_ino_hardlimit)))) { | |
265 | d->d_itimer = cpu_to_be32(get_seconds() + | |
8a7b8a89 | 266 | mp->m_quotainfo->qi_itimelimit); |
754002b4 NS |
267 | } else { |
268 | d->d_iwarns = 0; | |
1da177e4 LT |
269 | } |
270 | } else { | |
271 | if ((!d->d_ino_softlimit || | |
1149d96a CH |
272 | (be64_to_cpu(d->d_icount) < |
273 | be64_to_cpu(d->d_ino_softlimit))) && | |
1da177e4 | 274 | (!d->d_ino_hardlimit || |
1149d96a CH |
275 | (be64_to_cpu(d->d_icount) < |
276 | be64_to_cpu(d->d_ino_hardlimit)))) { | |
1da177e4 LT |
277 | d->d_itimer = 0; |
278 | } | |
279 | } | |
280 | ||
281 | if (!d->d_rtbtimer) { | |
1149d96a CH |
282 | if ((d->d_rtb_softlimit && |
283 | (be64_to_cpu(d->d_rtbcount) >= | |
284 | be64_to_cpu(d->d_rtb_softlimit))) || | |
285 | (d->d_rtb_hardlimit && | |
286 | (be64_to_cpu(d->d_rtbcount) >= | |
287 | be64_to_cpu(d->d_rtb_hardlimit)))) { | |
288 | d->d_rtbtimer = cpu_to_be32(get_seconds() + | |
8a7b8a89 | 289 | mp->m_quotainfo->qi_rtbtimelimit); |
754002b4 NS |
290 | } else { |
291 | d->d_rtbwarns = 0; | |
1da177e4 LT |
292 | } |
293 | } else { | |
294 | if ((!d->d_rtb_softlimit || | |
1149d96a CH |
295 | (be64_to_cpu(d->d_rtbcount) < |
296 | be64_to_cpu(d->d_rtb_softlimit))) && | |
1da177e4 | 297 | (!d->d_rtb_hardlimit || |
1149d96a CH |
298 | (be64_to_cpu(d->d_rtbcount) < |
299 | be64_to_cpu(d->d_rtb_hardlimit)))) { | |
1da177e4 LT |
300 | d->d_rtbtimer = 0; |
301 | } | |
302 | } | |
303 | } | |
304 | ||
1da177e4 LT |
305 | /* |
306 | * initialize a buffer full of dquots and log the whole thing | |
307 | */ | |
308 | STATIC void | |
309 | xfs_qm_init_dquot_blk( | |
310 | xfs_trans_t *tp, | |
311 | xfs_mount_t *mp, | |
312 | xfs_dqid_t id, | |
313 | uint type, | |
314 | xfs_buf_t *bp) | |
315 | { | |
8a7b8a89 | 316 | struct xfs_quotainfo *q = mp->m_quotainfo; |
1da177e4 LT |
317 | xfs_dqblk_t *d; |
318 | int curid, i; | |
319 | ||
320 | ASSERT(tp); | |
321 | ASSERT(XFS_BUF_ISBUSY(bp)); | |
322 | ASSERT(XFS_BUF_VALUSEMA(bp) <= 0); | |
323 | ||
324 | d = (xfs_dqblk_t *)XFS_BUF_PTR(bp); | |
325 | ||
326 | /* | |
327 | * ID of the first dquot in the block - id's are zero based. | |
328 | */ | |
8a7b8a89 | 329 | curid = id - (id % q->qi_dqperchunk); |
1da177e4 | 330 | ASSERT(curid >= 0); |
8a7b8a89 CH |
331 | memset(d, 0, BBTOB(q->qi_dqchunklen)); |
332 | for (i = 0; i < q->qi_dqperchunk; i++, d++, curid++) | |
1da177e4 LT |
333 | xfs_qm_dqinit_core(curid, type, d); |
334 | xfs_trans_dquot_buf(tp, bp, | |
c1155410 DC |
335 | (type & XFS_DQ_USER ? XFS_BLF_UDQUOT_BUF : |
336 | ((type & XFS_DQ_PROJ) ? XFS_BLF_PDQUOT_BUF : | |
337 | XFS_BLF_GDQUOT_BUF))); | |
8a7b8a89 | 338 | xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1); |
1da177e4 LT |
339 | } |
340 | ||
341 | ||
342 | ||
343 | /* | |
344 | * Allocate a block and fill it with dquots. | |
345 | * This is called when the bmapi finds a hole. | |
346 | */ | |
347 | STATIC int | |
348 | xfs_qm_dqalloc( | |
efa092f3 | 349 | xfs_trans_t **tpp, |
1da177e4 LT |
350 | xfs_mount_t *mp, |
351 | xfs_dquot_t *dqp, | |
352 | xfs_inode_t *quotip, | |
353 | xfs_fileoff_t offset_fsb, | |
354 | xfs_buf_t **O_bpp) | |
355 | { | |
356 | xfs_fsblock_t firstblock; | |
357 | xfs_bmap_free_t flist; | |
358 | xfs_bmbt_irec_t map; | |
359 | int nmaps, error, committed; | |
360 | xfs_buf_t *bp; | |
efa092f3 | 361 | xfs_trans_t *tp = *tpp; |
1da177e4 LT |
362 | |
363 | ASSERT(tp != NULL); | |
0b1b213f CH |
364 | |
365 | trace_xfs_dqalloc(dqp); | |
1da177e4 LT |
366 | |
367 | /* | |
368 | * Initialize the bmap freelist prior to calling bmapi code. | |
369 | */ | |
9d87c319 | 370 | xfs_bmap_init(&flist, &firstblock); |
1da177e4 LT |
371 | xfs_ilock(quotip, XFS_ILOCK_EXCL); |
372 | /* | |
373 | * Return if this type of quotas is turned off while we didn't | |
374 | * have an inode lock | |
375 | */ | |
376 | if (XFS_IS_THIS_QUOTA_OFF(dqp)) { | |
377 | xfs_iunlock(quotip, XFS_ILOCK_EXCL); | |
378 | return (ESRCH); | |
379 | } | |
380 | ||
381 | /* | |
382 | * xfs_trans_commit normally decrements the vnode ref count | |
383 | * when it unlocks the inode. Since we want to keep the quota | |
384 | * inode around, we bump the vnode ref count now. | |
385 | */ | |
0b1f9177 | 386 | IHOLD(quotip); |
1da177e4 LT |
387 | |
388 | xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL); | |
389 | nmaps = 1; | |
390 | if ((error = xfs_bmapi(tp, quotip, | |
391 | offset_fsb, XFS_DQUOT_CLUSTER_SIZE_FSB, | |
392 | XFS_BMAPI_METADATA | XFS_BMAPI_WRITE, | |
393 | &firstblock, | |
394 | XFS_QM_DQALLOC_SPACE_RES(mp), | |
3e57ecf6 | 395 | &map, &nmaps, &flist, NULL))) { |
1da177e4 LT |
396 | goto error0; |
397 | } | |
398 | ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB); | |
399 | ASSERT(nmaps == 1); | |
400 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
401 | (map.br_startblock != HOLESTARTBLOCK)); | |
402 | ||
403 | /* | |
404 | * Keep track of the blkno to save a lookup later | |
405 | */ | |
406 | dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock); | |
407 | ||
408 | /* now we can just get the buffer (there's nothing to read yet) */ | |
409 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
410 | dqp->q_blkno, | |
8a7b8a89 | 411 | mp->m_quotainfo->qi_dqchunklen, |
1da177e4 LT |
412 | 0); |
413 | if (!bp || (error = XFS_BUF_GETERROR(bp))) | |
414 | goto error1; | |
415 | /* | |
416 | * Make a chunk of dquots out of this buffer and log | |
417 | * the entire thing. | |
418 | */ | |
1149d96a | 419 | xfs_qm_init_dquot_blk(tp, mp, be32_to_cpu(dqp->q_core.d_id), |
c8ad20ff | 420 | dqp->dq_flags & XFS_DQ_ALLTYPES, bp); |
1da177e4 | 421 | |
efa092f3 TS |
422 | /* |
423 | * xfs_bmap_finish() may commit the current transaction and | |
424 | * start a second transaction if the freelist is not empty. | |
425 | * | |
426 | * Since we still want to modify this buffer, we need to | |
427 | * ensure that the buffer is not released on commit of | |
428 | * the first transaction and ensure the buffer is added to the | |
429 | * second transaction. | |
430 | * | |
431 | * If there is only one transaction then don't stop the buffer | |
432 | * from being released when it commits later on. | |
433 | */ | |
434 | ||
435 | xfs_trans_bhold(tp, bp); | |
436 | ||
f7c99b6f | 437 | if ((error = xfs_bmap_finish(tpp, &flist, &committed))) { |
1da177e4 LT |
438 | goto error1; |
439 | } | |
440 | ||
efa092f3 TS |
441 | if (committed) { |
442 | tp = *tpp; | |
443 | xfs_trans_bjoin(tp, bp); | |
444 | } else { | |
445 | xfs_trans_bhold_release(tp, bp); | |
446 | } | |
447 | ||
1da177e4 LT |
448 | *O_bpp = bp; |
449 | return 0; | |
450 | ||
451 | error1: | |
452 | xfs_bmap_cancel(&flist); | |
453 | error0: | |
454 | xfs_iunlock(quotip, XFS_ILOCK_EXCL); | |
455 | ||
456 | return (error); | |
457 | } | |
458 | ||
459 | /* | |
460 | * Maps a dquot to the buffer containing its on-disk version. | |
461 | * This returns a ptr to the buffer containing the on-disk dquot | |
462 | * in the bpp param, and a ptr to the on-disk dquot within that buffer | |
463 | */ | |
464 | STATIC int | |
465 | xfs_qm_dqtobp( | |
efa092f3 | 466 | xfs_trans_t **tpp, |
1da177e4 LT |
467 | xfs_dquot_t *dqp, |
468 | xfs_disk_dquot_t **O_ddpp, | |
469 | xfs_buf_t **O_bpp, | |
470 | uint flags) | |
471 | { | |
472 | xfs_bmbt_irec_t map; | |
473 | int nmaps, error; | |
474 | xfs_buf_t *bp; | |
475 | xfs_inode_t *quotip; | |
476 | xfs_mount_t *mp; | |
477 | xfs_disk_dquot_t *ddq; | |
478 | xfs_dqid_t id; | |
479 | boolean_t newdquot; | |
efa092f3 | 480 | xfs_trans_t *tp = (tpp ? *tpp : NULL); |
1da177e4 LT |
481 | |
482 | mp = dqp->q_mount; | |
1149d96a | 483 | id = be32_to_cpu(dqp->q_core.d_id); |
1da177e4 LT |
484 | nmaps = 1; |
485 | newdquot = B_FALSE; | |
486 | ||
487 | /* | |
488 | * If we don't know where the dquot lives, find out. | |
489 | */ | |
490 | if (dqp->q_blkno == (xfs_daddr_t) 0) { | |
491 | /* We use the id as an index */ | |
8a7b8a89 CH |
492 | dqp->q_fileoffset = (xfs_fileoff_t)id / |
493 | mp->m_quotainfo->qi_dqperchunk; | |
1da177e4 LT |
494 | nmaps = 1; |
495 | quotip = XFS_DQ_TO_QIP(dqp); | |
496 | xfs_ilock(quotip, XFS_ILOCK_SHARED); | |
497 | /* | |
498 | * Return if this type of quotas is turned off while we didn't | |
499 | * have an inode lock | |
500 | */ | |
501 | if (XFS_IS_THIS_QUOTA_OFF(dqp)) { | |
502 | xfs_iunlock(quotip, XFS_ILOCK_SHARED); | |
503 | return (ESRCH); | |
504 | } | |
505 | /* | |
506 | * Find the block map; no allocations yet | |
507 | */ | |
508 | error = xfs_bmapi(NULL, quotip, dqp->q_fileoffset, | |
509 | XFS_DQUOT_CLUSTER_SIZE_FSB, | |
510 | XFS_BMAPI_METADATA, | |
3e57ecf6 | 511 | NULL, 0, &map, &nmaps, NULL, NULL); |
1da177e4 LT |
512 | |
513 | xfs_iunlock(quotip, XFS_ILOCK_SHARED); | |
514 | if (error) | |
515 | return (error); | |
516 | ASSERT(nmaps == 1); | |
517 | ASSERT(map.br_blockcount == 1); | |
518 | ||
519 | /* | |
520 | * offset of dquot in the (fixed sized) dquot chunk. | |
521 | */ | |
8a7b8a89 | 522 | dqp->q_bufoffset = (id % mp->m_quotainfo->qi_dqperchunk) * |
1da177e4 LT |
523 | sizeof(xfs_dqblk_t); |
524 | if (map.br_startblock == HOLESTARTBLOCK) { | |
525 | /* | |
526 | * We don't allocate unless we're asked to | |
527 | */ | |
528 | if (!(flags & XFS_QMOPT_DQALLOC)) | |
529 | return (ENOENT); | |
530 | ||
531 | ASSERT(tp); | |
efa092f3 | 532 | if ((error = xfs_qm_dqalloc(tpp, mp, dqp, quotip, |
1da177e4 LT |
533 | dqp->q_fileoffset, &bp))) |
534 | return (error); | |
efa092f3 | 535 | tp = *tpp; |
1da177e4 LT |
536 | newdquot = B_TRUE; |
537 | } else { | |
538 | /* | |
539 | * store the blkno etc so that we don't have to do the | |
540 | * mapping all the time | |
541 | */ | |
542 | dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock); | |
543 | } | |
544 | } | |
545 | ASSERT(dqp->q_blkno != DELAYSTARTBLOCK); | |
546 | ASSERT(dqp->q_blkno != HOLESTARTBLOCK); | |
547 | ||
548 | /* | |
549 | * Read in the buffer, unless we've just done the allocation | |
550 | * (in which case we already have the buf). | |
551 | */ | |
8a7b8a89 | 552 | if (!newdquot) { |
0b1b213f CH |
553 | trace_xfs_dqtobp_read(dqp); |
554 | ||
8a7b8a89 CH |
555 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, |
556 | dqp->q_blkno, | |
557 | mp->m_quotainfo->qi_dqchunklen, | |
558 | 0, &bp); | |
1da177e4 LT |
559 | if (error || !bp) |
560 | return XFS_ERROR(error); | |
561 | } | |
562 | ASSERT(XFS_BUF_ISBUSY(bp)); | |
563 | ASSERT(XFS_BUF_VALUSEMA(bp) <= 0); | |
564 | ||
565 | /* | |
566 | * calculate the location of the dquot inside the buffer. | |
567 | */ | |
568 | ddq = (xfs_disk_dquot_t *)((char *)XFS_BUF_PTR(bp) + dqp->q_bufoffset); | |
569 | ||
570 | /* | |
571 | * A simple sanity check in case we got a corrupted dquot... | |
572 | */ | |
c8ad20ff | 573 | if (xfs_qm_dqcheck(ddq, id, dqp->dq_flags & XFS_DQ_ALLTYPES, |
1da177e4 LT |
574 | flags & (XFS_QMOPT_DQREPAIR|XFS_QMOPT_DOWARN), |
575 | "dqtobp")) { | |
576 | if (!(flags & XFS_QMOPT_DQREPAIR)) { | |
577 | xfs_trans_brelse(tp, bp); | |
578 | return XFS_ERROR(EIO); | |
579 | } | |
580 | XFS_BUF_BUSY(bp); /* We dirtied this */ | |
581 | } | |
582 | ||
583 | *O_bpp = bp; | |
584 | *O_ddpp = ddq; | |
585 | ||
586 | return (0); | |
587 | } | |
588 | ||
589 | ||
590 | /* | |
591 | * Read in the ondisk dquot using dqtobp() then copy it to an incore version, | |
592 | * and release the buffer immediately. | |
593 | * | |
594 | */ | |
595 | /* ARGSUSED */ | |
596 | STATIC int | |
597 | xfs_qm_dqread( | |
efa092f3 | 598 | xfs_trans_t **tpp, |
1da177e4 LT |
599 | xfs_dqid_t id, |
600 | xfs_dquot_t *dqp, /* dquot to get filled in */ | |
601 | uint flags) | |
602 | { | |
603 | xfs_disk_dquot_t *ddqp; | |
604 | xfs_buf_t *bp; | |
605 | int error; | |
efa092f3 TS |
606 | xfs_trans_t *tp; |
607 | ||
608 | ASSERT(tpp); | |
1da177e4 | 609 | |
0b1b213f CH |
610 | trace_xfs_dqread(dqp); |
611 | ||
1da177e4 LT |
612 | /* |
613 | * get a pointer to the on-disk dquot and the buffer containing it | |
614 | * dqp already knows its own type (GROUP/USER). | |
615 | */ | |
efa092f3 | 616 | if ((error = xfs_qm_dqtobp(tpp, dqp, &ddqp, &bp, flags))) { |
1da177e4 LT |
617 | return (error); |
618 | } | |
efa092f3 | 619 | tp = *tpp; |
1da177e4 LT |
620 | |
621 | /* copy everything from disk dquot to the incore dquot */ | |
622 | memcpy(&dqp->q_core, ddqp, sizeof(xfs_disk_dquot_t)); | |
1149d96a | 623 | ASSERT(be32_to_cpu(dqp->q_core.d_id) == id); |
1da177e4 LT |
624 | xfs_qm_dquot_logitem_init(dqp); |
625 | ||
626 | /* | |
627 | * Reservation counters are defined as reservation plus current usage | |
628 | * to avoid having to add everytime. | |
629 | */ | |
1149d96a CH |
630 | dqp->q_res_bcount = be64_to_cpu(ddqp->d_bcount); |
631 | dqp->q_res_icount = be64_to_cpu(ddqp->d_icount); | |
632 | dqp->q_res_rtbcount = be64_to_cpu(ddqp->d_rtbcount); | |
1da177e4 LT |
633 | |
634 | /* Mark the buf so that this will stay incore a little longer */ | |
635 | XFS_BUF_SET_VTYPE_REF(bp, B_FS_DQUOT, XFS_DQUOT_REF); | |
636 | ||
637 | /* | |
638 | * We got the buffer with a xfs_trans_read_buf() (in dqtobp()) | |
639 | * So we need to release with xfs_trans_brelse(). | |
640 | * The strategy here is identical to that of inodes; we lock | |
641 | * the dquot in xfs_qm_dqget() before making it accessible to | |
642 | * others. This is because dquots, like inodes, need a good level of | |
643 | * concurrency, and we don't want to take locks on the entire buffers | |
644 | * for dquot accesses. | |
645 | * Note also that the dquot buffer may even be dirty at this point, if | |
646 | * this particular dquot was repaired. We still aren't afraid to | |
647 | * brelse it because we have the changes incore. | |
648 | */ | |
649 | ASSERT(XFS_BUF_ISBUSY(bp)); | |
650 | ASSERT(XFS_BUF_VALUSEMA(bp) <= 0); | |
651 | xfs_trans_brelse(tp, bp); | |
652 | ||
653 | return (error); | |
654 | } | |
655 | ||
656 | ||
657 | /* | |
658 | * allocate an incore dquot from the kernel heap, | |
659 | * and fill its core with quota information kept on disk. | |
660 | * If XFS_QMOPT_DQALLOC is set, it'll allocate a dquot on disk | |
661 | * if it wasn't already allocated. | |
662 | */ | |
663 | STATIC int | |
664 | xfs_qm_idtodq( | |
665 | xfs_mount_t *mp, | |
666 | xfs_dqid_t id, /* gid or uid, depending on type */ | |
667 | uint type, /* UDQUOT or GDQUOT */ | |
668 | uint flags, /* DQALLOC, DQREPAIR */ | |
669 | xfs_dquot_t **O_dqpp)/* OUT : incore dquot, not locked */ | |
670 | { | |
671 | xfs_dquot_t *dqp; | |
672 | int error; | |
673 | xfs_trans_t *tp; | |
674 | int cancelflags=0; | |
675 | ||
676 | dqp = xfs_qm_dqinit(mp, id, type); | |
677 | tp = NULL; | |
678 | if (flags & XFS_QMOPT_DQALLOC) { | |
679 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC); | |
8a7b8a89 CH |
680 | error = xfs_trans_reserve(tp, XFS_QM_DQALLOC_SPACE_RES(mp), |
681 | XFS_WRITE_LOG_RES(mp) + | |
682 | BBTOB(mp->m_quotainfo->qi_dqchunklen) - 1 + | |
683 | 128, | |
684 | 0, | |
685 | XFS_TRANS_PERM_LOG_RES, | |
686 | XFS_WRITE_LOG_COUNT); | |
687 | if (error) { | |
1da177e4 LT |
688 | cancelflags = 0; |
689 | goto error0; | |
690 | } | |
691 | cancelflags = XFS_TRANS_RELEASE_LOG_RES; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Read it from disk; xfs_dqread() takes care of | |
696 | * all the necessary initialization of dquot's fields (locks, etc) | |
697 | */ | |
efa092f3 | 698 | if ((error = xfs_qm_dqread(&tp, id, dqp, flags))) { |
1da177e4 LT |
699 | /* |
700 | * This can happen if quotas got turned off (ESRCH), | |
701 | * or if the dquot didn't exist on disk and we ask to | |
702 | * allocate (ENOENT). | |
703 | */ | |
0b1b213f | 704 | trace_xfs_dqread_fail(dqp); |
1da177e4 LT |
705 | cancelflags |= XFS_TRANS_ABORT; |
706 | goto error0; | |
707 | } | |
708 | if (tp) { | |
1c72bf90 | 709 | if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) |
1da177e4 LT |
710 | goto error1; |
711 | } | |
712 | ||
713 | *O_dqpp = dqp; | |
714 | return (0); | |
715 | ||
716 | error0: | |
717 | ASSERT(error); | |
718 | if (tp) | |
719 | xfs_trans_cancel(tp, cancelflags); | |
720 | error1: | |
721 | xfs_qm_dqdestroy(dqp); | |
722 | *O_dqpp = NULL; | |
723 | return (error); | |
724 | } | |
725 | ||
726 | /* | |
727 | * Lookup a dquot in the incore dquot hashtable. We keep two separate | |
728 | * hashtables for user and group dquots; and, these are global tables | |
729 | * inside the XQM, not per-filesystem tables. | |
730 | * The hash chain must be locked by caller, and it is left locked | |
731 | * on return. Returning dquot is locked. | |
732 | */ | |
733 | STATIC int | |
734 | xfs_qm_dqlookup( | |
735 | xfs_mount_t *mp, | |
736 | xfs_dqid_t id, | |
737 | xfs_dqhash_t *qh, | |
738 | xfs_dquot_t **O_dqpp) | |
739 | { | |
740 | xfs_dquot_t *dqp; | |
741 | uint flist_locked; | |
1da177e4 | 742 | |
c9a192dc | 743 | ASSERT(mutex_is_locked(&qh->qh_lock)); |
1da177e4 LT |
744 | |
745 | flist_locked = B_FALSE; | |
746 | ||
747 | /* | |
748 | * Traverse the hashchain looking for a match | |
749 | */ | |
e6a81f13 | 750 | list_for_each_entry(dqp, &qh->qh_list, q_hashlist) { |
1da177e4 LT |
751 | /* |
752 | * We already have the hashlock. We don't need the | |
753 | * dqlock to look at the id field of the dquot, since the | |
754 | * id can't be modified without the hashlock anyway. | |
755 | */ | |
1149d96a | 756 | if (be32_to_cpu(dqp->q_core.d_id) == id && dqp->q_mount == mp) { |
0b1b213f CH |
757 | trace_xfs_dqlookup_found(dqp); |
758 | ||
1da177e4 LT |
759 | /* |
760 | * All in core dquots must be on the dqlist of mp | |
761 | */ | |
3a25404b | 762 | ASSERT(!list_empty(&dqp->q_mplist)); |
1da177e4 LT |
763 | |
764 | xfs_dqlock(dqp); | |
765 | if (dqp->q_nrefs == 0) { | |
3a8406f6 DC |
766 | ASSERT(!list_empty(&dqp->q_freelist)); |
767 | if (!mutex_trylock(&xfs_Gqm->qm_dqfrlist_lock)) { | |
0b1b213f | 768 | trace_xfs_dqlookup_want(dqp); |
1da177e4 LT |
769 | |
770 | /* | |
771 | * We may have raced with dqreclaim_one() | |
772 | * (and lost). So, flag that we don't | |
773 | * want the dquot to be reclaimed. | |
774 | */ | |
775 | dqp->dq_flags |= XFS_DQ_WANT; | |
776 | xfs_dqunlock(dqp); | |
3a8406f6 | 777 | mutex_lock(&xfs_Gqm->qm_dqfrlist_lock); |
1da177e4 LT |
778 | xfs_dqlock(dqp); |
779 | dqp->dq_flags &= ~(XFS_DQ_WANT); | |
780 | } | |
781 | flist_locked = B_TRUE; | |
782 | } | |
783 | ||
784 | /* | |
785 | * id couldn't have changed; we had the hashlock all | |
786 | * along | |
787 | */ | |
1149d96a | 788 | ASSERT(be32_to_cpu(dqp->q_core.d_id) == id); |
1da177e4 LT |
789 | |
790 | if (flist_locked) { | |
791 | if (dqp->q_nrefs != 0) { | |
3a8406f6 | 792 | mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock); |
1da177e4 LT |
793 | flist_locked = B_FALSE; |
794 | } else { | |
3a8406f6 | 795 | /* take it off the freelist */ |
0b1b213f | 796 | trace_xfs_dqlookup_freelist(dqp); |
3a8406f6 DC |
797 | list_del_init(&dqp->q_freelist); |
798 | xfs_Gqm->qm_dqfrlist_cnt--; | |
1da177e4 LT |
799 | } |
800 | } | |
801 | ||
1da177e4 LT |
802 | XFS_DQHOLD(dqp); |
803 | ||
804 | if (flist_locked) | |
3a8406f6 | 805 | mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock); |
1da177e4 LT |
806 | /* |
807 | * move the dquot to the front of the hashchain | |
808 | */ | |
c9a192dc | 809 | ASSERT(mutex_is_locked(&qh->qh_lock)); |
e6a81f13 | 810 | list_move(&dqp->q_hashlist, &qh->qh_list); |
0b1b213f | 811 | trace_xfs_dqlookup_done(dqp); |
1da177e4 | 812 | *O_dqpp = dqp; |
e6a81f13 | 813 | return 0; |
1da177e4 LT |
814 | } |
815 | } | |
816 | ||
817 | *O_dqpp = NULL; | |
c9a192dc | 818 | ASSERT(mutex_is_locked(&qh->qh_lock)); |
1da177e4 LT |
819 | return (1); |
820 | } | |
821 | ||
822 | /* | |
823 | * Given the file system, inode OR id, and type (UDQUOT/GDQUOT), return a | |
824 | * a locked dquot, doing an allocation (if requested) as needed. | |
825 | * When both an inode and an id are given, the inode's id takes precedence. | |
826 | * That is, if the id changes while we don't hold the ilock inside this | |
827 | * function, the new dquot is returned, not necessarily the one requested | |
828 | * in the id argument. | |
829 | */ | |
830 | int | |
831 | xfs_qm_dqget( | |
832 | xfs_mount_t *mp, | |
833 | xfs_inode_t *ip, /* locked inode (optional) */ | |
c8ad20ff NS |
834 | xfs_dqid_t id, /* uid/projid/gid depending on type */ |
835 | uint type, /* XFS_DQ_USER/XFS_DQ_PROJ/XFS_DQ_GROUP */ | |
1da177e4 LT |
836 | uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */ |
837 | xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */ | |
838 | { | |
839 | xfs_dquot_t *dqp; | |
840 | xfs_dqhash_t *h; | |
841 | uint version; | |
842 | int error; | |
843 | ||
844 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
845 | if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) || | |
c8ad20ff | 846 | (! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ) || |
1da177e4 LT |
847 | (! XFS_IS_GQUOTA_ON(mp) && type == XFS_DQ_GROUP)) { |
848 | return (ESRCH); | |
849 | } | |
850 | h = XFS_DQ_HASH(mp, id, type); | |
851 | ||
852 | #ifdef DEBUG | |
853 | if (xfs_do_dqerror) { | |
854 | if ((xfs_dqerror_target == mp->m_ddev_targp) && | |
855 | (xfs_dqreq_num++ % xfs_dqerror_mod) == 0) { | |
856 | cmn_err(CE_DEBUG, "Returning error in dqget"); | |
857 | return (EIO); | |
858 | } | |
859 | } | |
860 | #endif | |
861 | ||
862 | again: | |
863 | ||
864 | #ifdef DEBUG | |
c8ad20ff NS |
865 | ASSERT(type == XFS_DQ_USER || |
866 | type == XFS_DQ_PROJ || | |
867 | type == XFS_DQ_GROUP); | |
1da177e4 | 868 | if (ip) { |
579aa9ca | 869 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
870 | if (type == XFS_DQ_USER) |
871 | ASSERT(ip->i_udquot == NULL); | |
872 | else | |
873 | ASSERT(ip->i_gdquot == NULL); | |
874 | } | |
875 | #endif | |
c9a192dc | 876 | mutex_lock(&h->qh_lock); |
1da177e4 LT |
877 | |
878 | /* | |
879 | * Look in the cache (hashtable). | |
880 | * The chain is kept locked during lookup. | |
881 | */ | |
882 | if (xfs_qm_dqlookup(mp, id, h, O_dqpp) == 0) { | |
883 | XQM_STATS_INC(xqmstats.xs_qm_dqcachehits); | |
884 | /* | |
885 | * The dquot was found, moved to the front of the chain, | |
886 | * taken off the freelist if it was on it, and locked | |
887 | * at this point. Just unlock the hashchain and return. | |
888 | */ | |
889 | ASSERT(*O_dqpp); | |
890 | ASSERT(XFS_DQ_IS_LOCKED(*O_dqpp)); | |
c9a192dc | 891 | mutex_unlock(&h->qh_lock); |
0b1b213f | 892 | trace_xfs_dqget_hit(*O_dqpp); |
1da177e4 LT |
893 | return (0); /* success */ |
894 | } | |
895 | XQM_STATS_INC(xqmstats.xs_qm_dqcachemisses); | |
896 | ||
897 | /* | |
898 | * Dquot cache miss. We don't want to keep the inode lock across | |
899 | * a (potential) disk read. Also we don't want to deal with the lock | |
900 | * ordering between quotainode and this inode. OTOH, dropping the inode | |
901 | * lock here means dealing with a chown that can happen before | |
902 | * we re-acquire the lock. | |
903 | */ | |
904 | if (ip) | |
905 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
906 | /* | |
907 | * Save the hashchain version stamp, and unlock the chain, so that | |
908 | * we don't keep the lock across a disk read | |
909 | */ | |
910 | version = h->qh_version; | |
c9a192dc | 911 | mutex_unlock(&h->qh_lock); |
1da177e4 LT |
912 | |
913 | /* | |
914 | * Allocate the dquot on the kernel heap, and read the ondisk | |
915 | * portion off the disk. Also, do all the necessary initialization | |
916 | * This can return ENOENT if dquot didn't exist on disk and we didn't | |
917 | * ask it to allocate; ESRCH if quotas got turned off suddenly. | |
918 | */ | |
919 | if ((error = xfs_qm_idtodq(mp, id, type, | |
920 | flags & (XFS_QMOPT_DQALLOC|XFS_QMOPT_DQREPAIR| | |
921 | XFS_QMOPT_DOWARN), | |
922 | &dqp))) { | |
923 | if (ip) | |
924 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
925 | return (error); | |
926 | } | |
927 | ||
928 | /* | |
929 | * See if this is mount code calling to look at the overall quota limits | |
930 | * which are stored in the id == 0 user or group's dquot. | |
931 | * Since we may not have done a quotacheck by this point, just return | |
932 | * the dquot without attaching it to any hashtables, lists, etc, or even | |
933 | * taking a reference. | |
934 | * The caller must dqdestroy this once done. | |
935 | */ | |
936 | if (flags & XFS_QMOPT_DQSUSER) { | |
937 | ASSERT(id == 0); | |
938 | ASSERT(! ip); | |
939 | goto dqret; | |
940 | } | |
941 | ||
942 | /* | |
943 | * Dquot lock comes after hashlock in the lock ordering | |
944 | */ | |
945 | if (ip) { | |
946 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
191f8488 | 947 | |
1da177e4 LT |
948 | /* |
949 | * A dquot could be attached to this inode by now, since | |
950 | * we had dropped the ilock. | |
951 | */ | |
952 | if (type == XFS_DQ_USER) { | |
191f8488 CH |
953 | if (!XFS_IS_UQUOTA_ON(mp)) { |
954 | /* inode stays locked on return */ | |
955 | xfs_qm_dqdestroy(dqp); | |
956 | return XFS_ERROR(ESRCH); | |
957 | } | |
1da177e4 LT |
958 | if (ip->i_udquot) { |
959 | xfs_qm_dqdestroy(dqp); | |
960 | dqp = ip->i_udquot; | |
961 | xfs_dqlock(dqp); | |
962 | goto dqret; | |
963 | } | |
964 | } else { | |
191f8488 CH |
965 | if (!XFS_IS_OQUOTA_ON(mp)) { |
966 | /* inode stays locked on return */ | |
967 | xfs_qm_dqdestroy(dqp); | |
968 | return XFS_ERROR(ESRCH); | |
969 | } | |
1da177e4 LT |
970 | if (ip->i_gdquot) { |
971 | xfs_qm_dqdestroy(dqp); | |
972 | dqp = ip->i_gdquot; | |
973 | xfs_dqlock(dqp); | |
974 | goto dqret; | |
975 | } | |
976 | } | |
977 | } | |
978 | ||
979 | /* | |
980 | * Hashlock comes after ilock in lock order | |
981 | */ | |
c9a192dc | 982 | mutex_lock(&h->qh_lock); |
1da177e4 LT |
983 | if (version != h->qh_version) { |
984 | xfs_dquot_t *tmpdqp; | |
985 | /* | |
986 | * Now, see if somebody else put the dquot in the | |
987 | * hashtable before us. This can happen because we didn't | |
988 | * keep the hashchain lock. We don't have to worry about | |
989 | * lock order between the two dquots here since dqp isn't | |
990 | * on any findable lists yet. | |
991 | */ | |
992 | if (xfs_qm_dqlookup(mp, id, h, &tmpdqp) == 0) { | |
993 | /* | |
994 | * Duplicate found. Just throw away the new dquot | |
995 | * and start over. | |
996 | */ | |
997 | xfs_qm_dqput(tmpdqp); | |
c9a192dc | 998 | mutex_unlock(&h->qh_lock); |
1da177e4 LT |
999 | xfs_qm_dqdestroy(dqp); |
1000 | XQM_STATS_INC(xqmstats.xs_qm_dquot_dups); | |
1001 | goto again; | |
1002 | } | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * Put the dquot at the beginning of the hash-chain and mp's list | |
1007 | * LOCK ORDER: hashlock, freelistlock, mplistlock, udqlock, gdqlock .. | |
1008 | */ | |
c9a192dc | 1009 | ASSERT(mutex_is_locked(&h->qh_lock)); |
1da177e4 | 1010 | dqp->q_hash = h; |
e6a81f13 DC |
1011 | list_add(&dqp->q_hashlist, &h->qh_list); |
1012 | h->qh_version++; | |
1da177e4 LT |
1013 | |
1014 | /* | |
1015 | * Attach this dquot to this filesystem's list of all dquots, | |
1016 | * kept inside the mount structure in m_quotainfo field | |
1017 | */ | |
3a25404b | 1018 | mutex_lock(&mp->m_quotainfo->qi_dqlist_lock); |
1da177e4 LT |
1019 | |
1020 | /* | |
1021 | * We return a locked dquot to the caller, with a reference taken | |
1022 | */ | |
1023 | xfs_dqlock(dqp); | |
1024 | dqp->q_nrefs = 1; | |
1025 | ||
3a25404b DC |
1026 | list_add(&dqp->q_mplist, &mp->m_quotainfo->qi_dqlist); |
1027 | mp->m_quotainfo->qi_dquots++; | |
1028 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); | |
c9a192dc | 1029 | mutex_unlock(&h->qh_lock); |
1da177e4 | 1030 | dqret: |
579aa9ca | 1031 | ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
0b1b213f | 1032 | trace_xfs_dqget_miss(dqp); |
1da177e4 LT |
1033 | *O_dqpp = dqp; |
1034 | return (0); | |
1035 | } | |
1036 | ||
1037 | ||
1038 | /* | |
1039 | * Release a reference to the dquot (decrement ref-count) | |
1040 | * and unlock it. If there is a group quota attached to this | |
1041 | * dquot, carefully release that too without tripping over | |
1042 | * deadlocks'n'stuff. | |
1043 | */ | |
1044 | void | |
1045 | xfs_qm_dqput( | |
1046 | xfs_dquot_t *dqp) | |
1047 | { | |
1048 | xfs_dquot_t *gdqp; | |
1049 | ||
1050 | ASSERT(dqp->q_nrefs > 0); | |
1051 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
0b1b213f CH |
1052 | |
1053 | trace_xfs_dqput(dqp); | |
1da177e4 LT |
1054 | |
1055 | if (dqp->q_nrefs != 1) { | |
1056 | dqp->q_nrefs--; | |
1057 | xfs_dqunlock(dqp); | |
1058 | return; | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * drop the dqlock and acquire the freelist and dqlock | |
1063 | * in the right order; but try to get it out-of-order first | |
1064 | */ | |
3a8406f6 | 1065 | if (!mutex_trylock(&xfs_Gqm->qm_dqfrlist_lock)) { |
0b1b213f | 1066 | trace_xfs_dqput_wait(dqp); |
1da177e4 | 1067 | xfs_dqunlock(dqp); |
3a8406f6 | 1068 | mutex_lock(&xfs_Gqm->qm_dqfrlist_lock); |
1da177e4 LT |
1069 | xfs_dqlock(dqp); |
1070 | } | |
1071 | ||
1072 | while (1) { | |
1073 | gdqp = NULL; | |
1074 | ||
1075 | /* We can't depend on nrefs being == 1 here */ | |
1076 | if (--dqp->q_nrefs == 0) { | |
0b1b213f CH |
1077 | trace_xfs_dqput_free(dqp); |
1078 | ||
3a8406f6 DC |
1079 | list_add_tail(&dqp->q_freelist, &xfs_Gqm->qm_dqfrlist); |
1080 | xfs_Gqm->qm_dqfrlist_cnt++; | |
1da177e4 LT |
1081 | |
1082 | /* | |
1083 | * If we just added a udquot to the freelist, then | |
1084 | * we want to release the gdquot reference that | |
1085 | * it (probably) has. Otherwise it'll keep the | |
1086 | * gdquot from getting reclaimed. | |
1087 | */ | |
1088 | if ((gdqp = dqp->q_gdquot)) { | |
1089 | /* | |
1090 | * Avoid a recursive dqput call | |
1091 | */ | |
1092 | xfs_dqlock(gdqp); | |
1093 | dqp->q_gdquot = NULL; | |
1094 | } | |
1da177e4 LT |
1095 | } |
1096 | xfs_dqunlock(dqp); | |
1097 | ||
1098 | /* | |
1099 | * If we had a group quota inside the user quota as a hint, | |
1100 | * release it now. | |
1101 | */ | |
1102 | if (! gdqp) | |
1103 | break; | |
1104 | dqp = gdqp; | |
1105 | } | |
3a8406f6 | 1106 | mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock); |
1da177e4 LT |
1107 | } |
1108 | ||
1109 | /* | |
1110 | * Release a dquot. Flush it if dirty, then dqput() it. | |
1111 | * dquot must not be locked. | |
1112 | */ | |
1113 | void | |
1114 | xfs_qm_dqrele( | |
1115 | xfs_dquot_t *dqp) | |
1116 | { | |
7d095257 CH |
1117 | if (!dqp) |
1118 | return; | |
1119 | ||
0b1b213f | 1120 | trace_xfs_dqrele(dqp); |
1da177e4 LT |
1121 | |
1122 | xfs_dqlock(dqp); | |
1123 | /* | |
1124 | * We don't care to flush it if the dquot is dirty here. | |
1125 | * That will create stutters that we want to avoid. | |
1126 | * Instead we do a delayed write when we try to reclaim | |
1127 | * a dirty dquot. Also xfs_sync will take part of the burden... | |
1128 | */ | |
1129 | xfs_qm_dqput(dqp); | |
1130 | } | |
1131 | ||
ca30b2a7 CH |
1132 | /* |
1133 | * This is the dquot flushing I/O completion routine. It is called | |
1134 | * from interrupt level when the buffer containing the dquot is | |
1135 | * flushed to disk. It is responsible for removing the dquot logitem | |
1136 | * from the AIL if it has not been re-logged, and unlocking the dquot's | |
1137 | * flush lock. This behavior is very similar to that of inodes.. | |
1138 | */ | |
1139 | STATIC void | |
1140 | xfs_qm_dqflush_done( | |
1141 | struct xfs_buf *bp, | |
1142 | struct xfs_log_item *lip) | |
1143 | { | |
1144 | xfs_dq_logitem_t *qip = (struct xfs_dq_logitem *)lip; | |
1145 | xfs_dquot_t *dqp = qip->qli_dquot; | |
1146 | struct xfs_ail *ailp = lip->li_ailp; | |
1147 | ||
1148 | /* | |
1149 | * We only want to pull the item from the AIL if its | |
1150 | * location in the log has not changed since we started the flush. | |
1151 | * Thus, we only bother if the dquot's lsn has | |
1152 | * not changed. First we check the lsn outside the lock | |
1153 | * since it's cheaper, and then we recheck while | |
1154 | * holding the lock before removing the dquot from the AIL. | |
1155 | */ | |
1156 | if ((lip->li_flags & XFS_LI_IN_AIL) && | |
1157 | lip->li_lsn == qip->qli_flush_lsn) { | |
1158 | ||
1159 | /* xfs_trans_ail_delete() drops the AIL lock. */ | |
1160 | spin_lock(&ailp->xa_lock); | |
1161 | if (lip->li_lsn == qip->qli_flush_lsn) | |
1162 | xfs_trans_ail_delete(ailp, lip); | |
1163 | else | |
1164 | spin_unlock(&ailp->xa_lock); | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Release the dq's flush lock since we're done with it. | |
1169 | */ | |
1170 | xfs_dqfunlock(dqp); | |
1171 | } | |
1da177e4 LT |
1172 | |
1173 | /* | |
1174 | * Write a modified dquot to disk. | |
1175 | * The dquot must be locked and the flush lock too taken by caller. | |
1176 | * The flush lock will not be unlocked until the dquot reaches the disk, | |
1177 | * but the dquot is free to be unlocked and modified by the caller | |
1178 | * in the interim. Dquot is still locked on return. This behavior is | |
1179 | * identical to that of inodes. | |
1180 | */ | |
1181 | int | |
1182 | xfs_qm_dqflush( | |
1183 | xfs_dquot_t *dqp, | |
1184 | uint flags) | |
1185 | { | |
1186 | xfs_mount_t *mp; | |
1187 | xfs_buf_t *bp; | |
1188 | xfs_disk_dquot_t *ddqp; | |
1189 | int error; | |
1da177e4 LT |
1190 | |
1191 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
e1f49cf2 | 1192 | ASSERT(!completion_done(&dqp->q_flush)); |
0b1b213f | 1193 | trace_xfs_dqflush(dqp); |
1da177e4 LT |
1194 | |
1195 | /* | |
2f8a3ce1 DC |
1196 | * If not dirty, or it's pinned and we are not supposed to |
1197 | * block, nada. | |
1da177e4 | 1198 | */ |
2f8a3ce1 | 1199 | if (!XFS_DQ_IS_DIRTY(dqp) || |
20026d92 | 1200 | (!(flags & SYNC_WAIT) && atomic_read(&dqp->q_pincount) > 0)) { |
1da177e4 | 1201 | xfs_dqfunlock(dqp); |
2f8a3ce1 | 1202 | return 0; |
1da177e4 | 1203 | } |
1da177e4 LT |
1204 | xfs_qm_dqunpin_wait(dqp); |
1205 | ||
1206 | /* | |
1207 | * This may have been unpinned because the filesystem is shutting | |
1208 | * down forcibly. If that's the case we must not write this dquot | |
1209 | * to disk, because the log record didn't make it to disk! | |
1210 | */ | |
1211 | if (XFS_FORCED_SHUTDOWN(dqp->q_mount)) { | |
1212 | dqp->dq_flags &= ~(XFS_DQ_DIRTY); | |
1213 | xfs_dqfunlock(dqp); | |
1214 | return XFS_ERROR(EIO); | |
1215 | } | |
1216 | ||
1217 | /* | |
1218 | * Get the buffer containing the on-disk dquot | |
1219 | * We don't need a transaction envelope because we know that the | |
1220 | * the ondisk-dquot has already been allocated for. | |
1221 | */ | |
1222 | if ((error = xfs_qm_dqtobp(NULL, dqp, &ddqp, &bp, XFS_QMOPT_DOWARN))) { | |
1da177e4 LT |
1223 | ASSERT(error != ENOENT); |
1224 | /* | |
1225 | * Quotas could have gotten turned off (ESRCH) | |
1226 | */ | |
1227 | xfs_dqfunlock(dqp); | |
1228 | return (error); | |
1229 | } | |
1230 | ||
1149d96a | 1231 | if (xfs_qm_dqcheck(&dqp->q_core, be32_to_cpu(ddqp->d_id), |
c8ad20ff | 1232 | 0, XFS_QMOPT_DOWARN, "dqflush (incore copy)")) { |
7d04a335 | 1233 | xfs_force_shutdown(dqp->q_mount, SHUTDOWN_CORRUPT_INCORE); |
1da177e4 LT |
1234 | return XFS_ERROR(EIO); |
1235 | } | |
1236 | ||
1237 | /* This is the only portion of data that needs to persist */ | |
1238 | memcpy(ddqp, &(dqp->q_core), sizeof(xfs_disk_dquot_t)); | |
1239 | ||
1240 | /* | |
1241 | * Clear the dirty field and remember the flush lsn for later use. | |
1242 | */ | |
1243 | dqp->dq_flags &= ~(XFS_DQ_DIRTY); | |
1244 | mp = dqp->q_mount; | |
1245 | ||
7b2e2a31 DC |
1246 | xfs_trans_ail_copy_lsn(mp->m_ail, &dqp->q_logitem.qli_flush_lsn, |
1247 | &dqp->q_logitem.qli_item.li_lsn); | |
1da177e4 LT |
1248 | |
1249 | /* | |
1250 | * Attach an iodone routine so that we can remove this dquot from the | |
1251 | * AIL and release the flush lock once the dquot is synced to disk. | |
1252 | */ | |
ca30b2a7 CH |
1253 | xfs_buf_attach_iodone(bp, xfs_qm_dqflush_done, |
1254 | &dqp->q_logitem.qli_item); | |
1255 | ||
1da177e4 LT |
1256 | /* |
1257 | * If the buffer is pinned then push on the log so we won't | |
1258 | * get stuck waiting in the write for too long. | |
1259 | */ | |
1260 | if (XFS_BUF_ISPINNED(bp)) { | |
0b1b213f | 1261 | trace_xfs_dqflush_force(dqp); |
a14a348b | 1262 | xfs_log_force(mp, 0); |
1da177e4 LT |
1263 | } |
1264 | ||
20026d92 | 1265 | if (flags & SYNC_WAIT) |
1da177e4 | 1266 | error = xfs_bwrite(mp, bp); |
20026d92 DC |
1267 | else |
1268 | xfs_bdwrite(mp, bp); | |
0b1b213f CH |
1269 | |
1270 | trace_xfs_dqflush_done(dqp); | |
1271 | ||
1da177e4 LT |
1272 | /* |
1273 | * dqp is still locked, but caller is free to unlock it now. | |
1274 | */ | |
20026d92 | 1275 | return error; |
1da177e4 LT |
1276 | |
1277 | } | |
1278 | ||
1da177e4 LT |
1279 | int |
1280 | xfs_qm_dqlock_nowait( | |
1281 | xfs_dquot_t *dqp) | |
1282 | { | |
e1f49cf2 | 1283 | return mutex_trylock(&dqp->q_qlock); |
1da177e4 LT |
1284 | } |
1285 | ||
1286 | void | |
1287 | xfs_dqlock( | |
1288 | xfs_dquot_t *dqp) | |
1289 | { | |
e1f49cf2 | 1290 | mutex_lock(&dqp->q_qlock); |
1da177e4 LT |
1291 | } |
1292 | ||
1293 | void | |
1294 | xfs_dqunlock( | |
1295 | xfs_dquot_t *dqp) | |
1296 | { | |
1297 | mutex_unlock(&(dqp->q_qlock)); | |
1298 | if (dqp->q_logitem.qli_dquot == dqp) { | |
1299 | /* Once was dqp->q_mount, but might just have been cleared */ | |
783a2f65 | 1300 | xfs_trans_unlocked_item(dqp->q_logitem.qli_item.li_ailp, |
1da177e4 LT |
1301 | (xfs_log_item_t*)&(dqp->q_logitem)); |
1302 | } | |
1303 | } | |
1304 | ||
1305 | ||
1306 | void | |
1307 | xfs_dqunlock_nonotify( | |
1308 | xfs_dquot_t *dqp) | |
1309 | { | |
1310 | mutex_unlock(&(dqp->q_qlock)); | |
1311 | } | |
1312 | ||
5bb87a33 CH |
1313 | /* |
1314 | * Lock two xfs_dquot structures. | |
1315 | * | |
1316 | * To avoid deadlocks we always lock the quota structure with | |
1317 | * the lowerd id first. | |
1318 | */ | |
1da177e4 LT |
1319 | void |
1320 | xfs_dqlock2( | |
1321 | xfs_dquot_t *d1, | |
1322 | xfs_dquot_t *d2) | |
1323 | { | |
1324 | if (d1 && d2) { | |
1325 | ASSERT(d1 != d2); | |
1149d96a CH |
1326 | if (be32_to_cpu(d1->q_core.d_id) > |
1327 | be32_to_cpu(d2->q_core.d_id)) { | |
5bb87a33 CH |
1328 | mutex_lock(&d2->q_qlock); |
1329 | mutex_lock_nested(&d1->q_qlock, XFS_QLOCK_NESTED); | |
1da177e4 | 1330 | } else { |
5bb87a33 CH |
1331 | mutex_lock(&d1->q_qlock); |
1332 | mutex_lock_nested(&d2->q_qlock, XFS_QLOCK_NESTED); | |
1da177e4 | 1333 | } |
5bb87a33 CH |
1334 | } else if (d1) { |
1335 | mutex_lock(&d1->q_qlock); | |
1336 | } else if (d2) { | |
1337 | mutex_lock(&d2->q_qlock); | |
1da177e4 LT |
1338 | } |
1339 | } | |
1340 | ||
1341 | ||
1342 | /* | |
1343 | * Take a dquot out of the mount's dqlist as well as the hashlist. | |
1344 | * This is called via unmount as well as quotaoff, and the purge | |
1345 | * will always succeed unless there are soft (temp) references | |
1346 | * outstanding. | |
1347 | * | |
1348 | * This returns 0 if it was purged, 1 if it wasn't. It's not an error code | |
1349 | * that we're returning! XXXsup - not cool. | |
1350 | */ | |
1351 | /* ARGSUSED */ | |
1352 | int | |
1353 | xfs_qm_dqpurge( | |
4f0e8a98 | 1354 | xfs_dquot_t *dqp) |
1da177e4 | 1355 | { |
e6a81f13 | 1356 | xfs_dqhash_t *qh = dqp->q_hash; |
3c56836f | 1357 | xfs_mount_t *mp = dqp->q_mount; |
1da177e4 | 1358 | |
3a25404b | 1359 | ASSERT(mutex_is_locked(&mp->m_quotainfo->qi_dqlist_lock)); |
c9a192dc | 1360 | ASSERT(mutex_is_locked(&dqp->q_hash->qh_lock)); |
1da177e4 LT |
1361 | |
1362 | xfs_dqlock(dqp); | |
1363 | /* | |
1364 | * We really can't afford to purge a dquot that is | |
1365 | * referenced, because these are hard refs. | |
1366 | * It shouldn't happen in general because we went thru _all_ inodes in | |
1367 | * dqrele_all_inodes before calling this and didn't let the mountlock go. | |
1368 | * However it is possible that we have dquots with temporary | |
1369 | * references that are not attached to an inode. e.g. see xfs_setattr(). | |
1370 | */ | |
1371 | if (dqp->q_nrefs != 0) { | |
1372 | xfs_dqunlock(dqp); | |
c9a192dc | 1373 | mutex_unlock(&dqp->q_hash->qh_lock); |
1da177e4 LT |
1374 | return (1); |
1375 | } | |
1376 | ||
3a8406f6 | 1377 | ASSERT(!list_empty(&dqp->q_freelist)); |
1da177e4 LT |
1378 | |
1379 | /* | |
1380 | * If we're turning off quotas, we have to make sure that, for | |
1381 | * example, we don't delete quota disk blocks while dquots are | |
1382 | * in the process of getting written to those disk blocks. | |
1383 | * This dquot might well be on AIL, and we can't leave it there | |
1384 | * if we're turning off quotas. Basically, we need this flush | |
1385 | * lock, and are willing to block on it. | |
1386 | */ | |
e1f49cf2 | 1387 | if (!xfs_dqflock_nowait(dqp)) { |
1da177e4 LT |
1388 | /* |
1389 | * Block on the flush lock after nudging dquot buffer, | |
1390 | * if it is incore. | |
1391 | */ | |
1392 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * XXXIf we're turning this type of quotas off, we don't care | |
1397 | * about the dirty metadata sitting in this dquot. OTOH, if | |
1398 | * we're unmounting, we do care, so we flush it and wait. | |
1399 | */ | |
1400 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
3c56836f | 1401 | int error; |
0b1b213f | 1402 | |
1da177e4 LT |
1403 | /* dqflush unlocks dqflock */ |
1404 | /* | |
1405 | * Given that dqpurge is a very rare occurrence, it is OK | |
1406 | * that we're holding the hashlist and mplist locks | |
1407 | * across the disk write. But, ... XXXsup | |
1408 | * | |
1409 | * We don't care about getting disk errors here. We need | |
1410 | * to purge this dquot anyway, so we go ahead regardless. | |
1411 | */ | |
20026d92 | 1412 | error = xfs_qm_dqflush(dqp, SYNC_WAIT); |
3c56836f DC |
1413 | if (error) |
1414 | xfs_fs_cmn_err(CE_WARN, mp, | |
1415 | "xfs_qm_dqpurge: dquot %p flush failed", dqp); | |
1da177e4 LT |
1416 | xfs_dqflock(dqp); |
1417 | } | |
bc3048e3 | 1418 | ASSERT(atomic_read(&dqp->q_pincount) == 0); |
1da177e4 LT |
1419 | ASSERT(XFS_FORCED_SHUTDOWN(mp) || |
1420 | !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL)); | |
1421 | ||
e6a81f13 DC |
1422 | list_del_init(&dqp->q_hashlist); |
1423 | qh->qh_version++; | |
3a25404b DC |
1424 | list_del_init(&dqp->q_mplist); |
1425 | mp->m_quotainfo->qi_dqreclaims++; | |
1426 | mp->m_quotainfo->qi_dquots--; | |
1da177e4 LT |
1427 | /* |
1428 | * XXX Move this to the front of the freelist, if we can get the | |
1429 | * freelist lock. | |
1430 | */ | |
3a8406f6 | 1431 | ASSERT(!list_empty(&dqp->q_freelist)); |
1da177e4 LT |
1432 | |
1433 | dqp->q_mount = NULL; | |
1434 | dqp->q_hash = NULL; | |
1435 | dqp->dq_flags = XFS_DQ_INACTIVE; | |
1436 | memset(&dqp->q_core, 0, sizeof(dqp->q_core)); | |
1437 | xfs_dqfunlock(dqp); | |
1438 | xfs_dqunlock(dqp); | |
e6a81f13 | 1439 | mutex_unlock(&qh->qh_lock); |
1da177e4 LT |
1440 | return (0); |
1441 | } | |
1442 | ||
1443 | ||
1444 | #ifdef QUOTADEBUG | |
1445 | void | |
1446 | xfs_qm_dqprint(xfs_dquot_t *dqp) | |
1447 | { | |
1448 | cmn_err(CE_DEBUG, "-----------KERNEL DQUOT----------------"); | |
1449 | cmn_err(CE_DEBUG, "---- dquotID = %d", | |
1149d96a | 1450 | (int)be32_to_cpu(dqp->q_core.d_id)); |
c8ad20ff | 1451 | cmn_err(CE_DEBUG, "---- type = %s", DQFLAGTO_TYPESTR(dqp)); |
1da177e4 LT |
1452 | cmn_err(CE_DEBUG, "---- fs = 0x%p", dqp->q_mount); |
1453 | cmn_err(CE_DEBUG, "---- blkno = 0x%x", (int) dqp->q_blkno); | |
1454 | cmn_err(CE_DEBUG, "---- boffset = 0x%x", (int) dqp->q_bufoffset); | |
1455 | cmn_err(CE_DEBUG, "---- blkhlimit = %Lu (0x%x)", | |
1149d96a CH |
1456 | be64_to_cpu(dqp->q_core.d_blk_hardlimit), |
1457 | (int)be64_to_cpu(dqp->q_core.d_blk_hardlimit)); | |
1da177e4 | 1458 | cmn_err(CE_DEBUG, "---- blkslimit = %Lu (0x%x)", |
1149d96a CH |
1459 | be64_to_cpu(dqp->q_core.d_blk_softlimit), |
1460 | (int)be64_to_cpu(dqp->q_core.d_blk_softlimit)); | |
1da177e4 | 1461 | cmn_err(CE_DEBUG, "---- inohlimit = %Lu (0x%x)", |
1149d96a CH |
1462 | be64_to_cpu(dqp->q_core.d_ino_hardlimit), |
1463 | (int)be64_to_cpu(dqp->q_core.d_ino_hardlimit)); | |
1da177e4 | 1464 | cmn_err(CE_DEBUG, "---- inoslimit = %Lu (0x%x)", |
1149d96a CH |
1465 | be64_to_cpu(dqp->q_core.d_ino_softlimit), |
1466 | (int)be64_to_cpu(dqp->q_core.d_ino_softlimit)); | |
1da177e4 | 1467 | cmn_err(CE_DEBUG, "---- bcount = %Lu (0x%x)", |
1149d96a CH |
1468 | be64_to_cpu(dqp->q_core.d_bcount), |
1469 | (int)be64_to_cpu(dqp->q_core.d_bcount)); | |
1da177e4 | 1470 | cmn_err(CE_DEBUG, "---- icount = %Lu (0x%x)", |
1149d96a CH |
1471 | be64_to_cpu(dqp->q_core.d_icount), |
1472 | (int)be64_to_cpu(dqp->q_core.d_icount)); | |
1da177e4 | 1473 | cmn_err(CE_DEBUG, "---- btimer = %d", |
1149d96a | 1474 | (int)be32_to_cpu(dqp->q_core.d_btimer)); |
1da177e4 | 1475 | cmn_err(CE_DEBUG, "---- itimer = %d", |
1149d96a | 1476 | (int)be32_to_cpu(dqp->q_core.d_itimer)); |
1da177e4 LT |
1477 | cmn_err(CE_DEBUG, "---------------------------"); |
1478 | } | |
1479 | #endif | |
1480 | ||
1481 | /* | |
1482 | * Give the buffer a little push if it is incore and | |
1483 | * wait on the flush lock. | |
1484 | */ | |
1485 | void | |
1486 | xfs_qm_dqflock_pushbuf_wait( | |
1487 | xfs_dquot_t *dqp) | |
1488 | { | |
8a7b8a89 | 1489 | xfs_mount_t *mp = dqp->q_mount; |
1da177e4 LT |
1490 | xfs_buf_t *bp; |
1491 | ||
1492 | /* | |
1493 | * Check to see if the dquot has been flushed delayed | |
1494 | * write. If so, grab its buffer and send it | |
1495 | * out immediately. We'll be able to acquire | |
1496 | * the flush lock when the I/O completes. | |
1497 | */ | |
8a7b8a89 CH |
1498 | bp = xfs_incore(mp->m_ddev_targp, dqp->q_blkno, |
1499 | mp->m_quotainfo->qi_dqchunklen, XBF_TRYLOCK); | |
7d6a7bde DC |
1500 | if (!bp) |
1501 | goto out_lock; | |
1502 | ||
1503 | if (XFS_BUF_ISDELAYWRITE(bp)) { | |
1504 | if (XFS_BUF_ISPINNED(bp)) | |
8a7b8a89 | 1505 | xfs_log_force(mp, 0); |
7d6a7bde DC |
1506 | xfs_buf_delwri_promote(bp); |
1507 | wake_up_process(bp->b_target->bt_task); | |
1da177e4 | 1508 | } |
7d6a7bde DC |
1509 | xfs_buf_relse(bp); |
1510 | out_lock: | |
1da177e4 LT |
1511 | xfs_dqflock(dqp); |
1512 | } |