Commit | Line | Data |
---|---|---|
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 LT |
21 | #include "xfs_log.h" |
22 | #include "xfs_trans.h" | |
23 | #include "xfs_sb.h" | |
24 | #include "xfs_ag.h" | |
1da177e4 | 25 | #include "xfs_alloc.h" |
1da177e4 LT |
26 | #include "xfs_quota.h" |
27 | #include "xfs_mount.h" | |
1da177e4 | 28 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
29 | #include "xfs_inode.h" |
30 | #include "xfs_bmap.h" | |
1da177e4 LT |
31 | #include "xfs_rtalloc.h" |
32 | #include "xfs_error.h" | |
33 | #include "xfs_itable.h" | |
1da177e4 LT |
34 | #include "xfs_attr.h" |
35 | #include "xfs_buf_item.h" | |
36 | #include "xfs_trans_space.h" | |
37 | #include "xfs_trans_priv.h" | |
1da177e4 | 38 | #include "xfs_qm.h" |
3fe58f30 | 39 | #include "xfs_cksum.h" |
0b1b213f | 40 | #include "xfs_trace.h" |
1da177e4 | 41 | |
1da177e4 | 42 | /* |
bf72de31 CH |
43 | * Lock order: |
44 | * | |
45 | * ip->i_lock | |
9f920f11 | 46 | * qi->qi_tree_lock |
b84a3a96 CH |
47 | * dquot->q_qlock (xfs_dqlock() and friends) |
48 | * dquot->q_flush (xfs_dqflock() and friends) | |
49 | * qi->qi_lru_lock | |
bf72de31 CH |
50 | * |
51 | * If two dquots need to be locked the order is user before group/project, | |
52 | * otherwise by the lowest id first, see xfs_dqlock2. | |
53 | */ | |
1da177e4 | 54 | |
1da177e4 LT |
55 | #ifdef DEBUG |
56 | xfs_buftarg_t *xfs_dqerror_target; | |
57 | int xfs_do_dqerror; | |
58 | int xfs_dqreq_num; | |
59 | int xfs_dqerror_mod = 33; | |
60 | #endif | |
61 | ||
a05931ce CH |
62 | struct kmem_zone *xfs_qm_dqtrxzone; |
63 | static struct kmem_zone *xfs_qm_dqzone; | |
64 | ||
98b8c7a0 CH |
65 | static struct lock_class_key xfs_dquot_other_class; |
66 | ||
1da177e4 LT |
67 | /* |
68 | * This is called to free all the memory associated with a dquot | |
69 | */ | |
70 | void | |
71 | xfs_qm_dqdestroy( | |
72 | xfs_dquot_t *dqp) | |
73 | { | |
f8739c3c | 74 | ASSERT(list_empty(&dqp->q_lru)); |
1da177e4 LT |
75 | |
76 | mutex_destroy(&dqp->q_qlock); | |
a05931ce | 77 | kmem_zone_free(xfs_qm_dqzone, dqp); |
0b1b213f | 78 | |
48776fd2 | 79 | XFS_STATS_DEC(xs_qm_dquot); |
1da177e4 LT |
80 | } |
81 | ||
1da177e4 LT |
82 | /* |
83 | * If default limits are in force, push them into the dquot now. | |
84 | * We overwrite the dquot limits only if they are zero and this | |
85 | * is not the root dquot. | |
86 | */ | |
87 | void | |
88 | xfs_qm_adjust_dqlimits( | |
4b6eae2e BF |
89 | struct xfs_mount *mp, |
90 | struct xfs_dquot *dq) | |
1da177e4 | 91 | { |
4b6eae2e BF |
92 | struct xfs_quotainfo *q = mp->m_quotainfo; |
93 | struct xfs_disk_dquot *d = &dq->q_core; | |
b1366451 | 94 | int prealloc = 0; |
1da177e4 LT |
95 | |
96 | ASSERT(d->d_id); | |
97 | ||
b1366451 | 98 | if (q->qi_bsoftlimit && !d->d_blk_softlimit) { |
1149d96a | 99 | d->d_blk_softlimit = cpu_to_be64(q->qi_bsoftlimit); |
b1366451 BF |
100 | prealloc = 1; |
101 | } | |
102 | if (q->qi_bhardlimit && !d->d_blk_hardlimit) { | |
1149d96a | 103 | d->d_blk_hardlimit = cpu_to_be64(q->qi_bhardlimit); |
b1366451 BF |
104 | prealloc = 1; |
105 | } | |
1da177e4 | 106 | if (q->qi_isoftlimit && !d->d_ino_softlimit) |
1149d96a | 107 | d->d_ino_softlimit = cpu_to_be64(q->qi_isoftlimit); |
1da177e4 | 108 | if (q->qi_ihardlimit && !d->d_ino_hardlimit) |
1149d96a | 109 | d->d_ino_hardlimit = cpu_to_be64(q->qi_ihardlimit); |
1da177e4 | 110 | if (q->qi_rtbsoftlimit && !d->d_rtb_softlimit) |
1149d96a | 111 | d->d_rtb_softlimit = cpu_to_be64(q->qi_rtbsoftlimit); |
1da177e4 | 112 | if (q->qi_rtbhardlimit && !d->d_rtb_hardlimit) |
1149d96a | 113 | d->d_rtb_hardlimit = cpu_to_be64(q->qi_rtbhardlimit); |
b1366451 BF |
114 | |
115 | if (prealloc) | |
116 | xfs_dquot_set_prealloc_limits(dq); | |
1da177e4 LT |
117 | } |
118 | ||
119 | /* | |
120 | * Check the limits and timers of a dquot and start or reset timers | |
121 | * if necessary. | |
122 | * This gets called even when quota enforcement is OFF, which makes our | |
123 | * life a little less complicated. (We just don't reject any quota | |
124 | * reservations in that case, when enforcement is off). | |
125 | * We also return 0 as the values of the timers in Q_GETQUOTA calls, when | |
126 | * enforcement's off. | |
127 | * In contrast, warnings are a little different in that they don't | |
754002b4 NS |
128 | * 'automatically' get started when limits get exceeded. They do |
129 | * get reset to zero, however, when we find the count to be under | |
130 | * the soft limit (they are only ever set non-zero via userspace). | |
1da177e4 LT |
131 | */ |
132 | void | |
133 | xfs_qm_adjust_dqtimers( | |
134 | xfs_mount_t *mp, | |
135 | xfs_disk_dquot_t *d) | |
136 | { | |
137 | ASSERT(d->d_id); | |
138 | ||
ea15ab3c | 139 | #ifdef DEBUG |
1149d96a CH |
140 | if (d->d_blk_hardlimit) |
141 | ASSERT(be64_to_cpu(d->d_blk_softlimit) <= | |
142 | be64_to_cpu(d->d_blk_hardlimit)); | |
143 | if (d->d_ino_hardlimit) | |
144 | ASSERT(be64_to_cpu(d->d_ino_softlimit) <= | |
145 | be64_to_cpu(d->d_ino_hardlimit)); | |
146 | if (d->d_rtb_hardlimit) | |
147 | ASSERT(be64_to_cpu(d->d_rtb_softlimit) <= | |
148 | be64_to_cpu(d->d_rtb_hardlimit)); | |
1da177e4 | 149 | #endif |
ea15ab3c | 150 | |
1da177e4 | 151 | if (!d->d_btimer) { |
1149d96a | 152 | if ((d->d_blk_softlimit && |
d0a3fe67 | 153 | (be64_to_cpu(d->d_bcount) > |
1149d96a CH |
154 | be64_to_cpu(d->d_blk_softlimit))) || |
155 | (d->d_blk_hardlimit && | |
d0a3fe67 | 156 | (be64_to_cpu(d->d_bcount) > |
1149d96a CH |
157 | be64_to_cpu(d->d_blk_hardlimit)))) { |
158 | d->d_btimer = cpu_to_be32(get_seconds() + | |
8a7b8a89 | 159 | mp->m_quotainfo->qi_btimelimit); |
754002b4 NS |
160 | } else { |
161 | d->d_bwarns = 0; | |
1da177e4 LT |
162 | } |
163 | } else { | |
164 | if ((!d->d_blk_softlimit || | |
d0a3fe67 | 165 | (be64_to_cpu(d->d_bcount) <= |
1149d96a | 166 | be64_to_cpu(d->d_blk_softlimit))) && |
1da177e4 | 167 | (!d->d_blk_hardlimit || |
d0a3fe67 | 168 | (be64_to_cpu(d->d_bcount) <= |
1149d96a | 169 | be64_to_cpu(d->d_blk_hardlimit)))) { |
1da177e4 LT |
170 | d->d_btimer = 0; |
171 | } | |
172 | } | |
173 | ||
174 | if (!d->d_itimer) { | |
1149d96a | 175 | if ((d->d_ino_softlimit && |
d0a3fe67 | 176 | (be64_to_cpu(d->d_icount) > |
1149d96a CH |
177 | be64_to_cpu(d->d_ino_softlimit))) || |
178 | (d->d_ino_hardlimit && | |
d0a3fe67 | 179 | (be64_to_cpu(d->d_icount) > |
1149d96a CH |
180 | be64_to_cpu(d->d_ino_hardlimit)))) { |
181 | d->d_itimer = cpu_to_be32(get_seconds() + | |
8a7b8a89 | 182 | mp->m_quotainfo->qi_itimelimit); |
754002b4 NS |
183 | } else { |
184 | d->d_iwarns = 0; | |
1da177e4 LT |
185 | } |
186 | } else { | |
187 | if ((!d->d_ino_softlimit || | |
d0a3fe67 | 188 | (be64_to_cpu(d->d_icount) <= |
1149d96a | 189 | be64_to_cpu(d->d_ino_softlimit))) && |
1da177e4 | 190 | (!d->d_ino_hardlimit || |
d0a3fe67 | 191 | (be64_to_cpu(d->d_icount) <= |
1149d96a | 192 | be64_to_cpu(d->d_ino_hardlimit)))) { |
1da177e4 LT |
193 | d->d_itimer = 0; |
194 | } | |
195 | } | |
196 | ||
197 | if (!d->d_rtbtimer) { | |
1149d96a | 198 | if ((d->d_rtb_softlimit && |
d0a3fe67 | 199 | (be64_to_cpu(d->d_rtbcount) > |
1149d96a CH |
200 | be64_to_cpu(d->d_rtb_softlimit))) || |
201 | (d->d_rtb_hardlimit && | |
d0a3fe67 | 202 | (be64_to_cpu(d->d_rtbcount) > |
1149d96a CH |
203 | be64_to_cpu(d->d_rtb_hardlimit)))) { |
204 | d->d_rtbtimer = cpu_to_be32(get_seconds() + | |
8a7b8a89 | 205 | mp->m_quotainfo->qi_rtbtimelimit); |
754002b4 NS |
206 | } else { |
207 | d->d_rtbwarns = 0; | |
1da177e4 LT |
208 | } |
209 | } else { | |
210 | if ((!d->d_rtb_softlimit || | |
d0a3fe67 | 211 | (be64_to_cpu(d->d_rtbcount) <= |
1149d96a | 212 | be64_to_cpu(d->d_rtb_softlimit))) && |
1da177e4 | 213 | (!d->d_rtb_hardlimit || |
d0a3fe67 | 214 | (be64_to_cpu(d->d_rtbcount) <= |
1149d96a | 215 | be64_to_cpu(d->d_rtb_hardlimit)))) { |
1da177e4 LT |
216 | d->d_rtbtimer = 0; |
217 | } | |
218 | } | |
219 | } | |
220 | ||
1da177e4 LT |
221 | /* |
222 | * initialize a buffer full of dquots and log the whole thing | |
223 | */ | |
224 | STATIC void | |
225 | xfs_qm_init_dquot_blk( | |
226 | xfs_trans_t *tp, | |
227 | xfs_mount_t *mp, | |
228 | xfs_dqid_t id, | |
229 | uint type, | |
230 | xfs_buf_t *bp) | |
231 | { | |
8a7b8a89 | 232 | struct xfs_quotainfo *q = mp->m_quotainfo; |
1da177e4 LT |
233 | xfs_dqblk_t *d; |
234 | int curid, i; | |
235 | ||
236 | ASSERT(tp); | |
0c842ad4 | 237 | ASSERT(xfs_buf_islocked(bp)); |
1da177e4 | 238 | |
62926044 | 239 | d = bp->b_addr; |
1da177e4 LT |
240 | |
241 | /* | |
242 | * ID of the first dquot in the block - id's are zero based. | |
243 | */ | |
8a7b8a89 | 244 | curid = id - (id % q->qi_dqperchunk); |
1da177e4 | 245 | ASSERT(curid >= 0); |
8a7b8a89 | 246 | memset(d, 0, BBTOB(q->qi_dqchunklen)); |
49d35a5c CH |
247 | for (i = 0; i < q->qi_dqperchunk; i++, d++, curid++) { |
248 | d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC); | |
249 | d->dd_diskdq.d_version = XFS_DQUOT_VERSION; | |
250 | d->dd_diskdq.d_id = cpu_to_be32(curid); | |
251 | d->dd_diskdq.d_flags = type; | |
3fe58f30 CH |
252 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
253 | uuid_copy(&d->dd_uuid, &mp->m_sb.sb_uuid); | |
49d35a5c CH |
254 | } |
255 | ||
1da177e4 | 256 | xfs_trans_dquot_buf(tp, bp, |
c1155410 DC |
257 | (type & XFS_DQ_USER ? XFS_BLF_UDQUOT_BUF : |
258 | ((type & XFS_DQ_PROJ) ? XFS_BLF_PDQUOT_BUF : | |
259 | XFS_BLF_GDQUOT_BUF))); | |
8a7b8a89 | 260 | xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1); |
1da177e4 LT |
261 | } |
262 | ||
b1366451 BF |
263 | /* |
264 | * Initialize the dynamic speculative preallocation thresholds. The lo/hi | |
265 | * watermarks correspond to the soft and hard limits by default. If a soft limit | |
266 | * is not specified, we use 95% of the hard limit. | |
267 | */ | |
268 | void | |
269 | xfs_dquot_set_prealloc_limits(struct xfs_dquot *dqp) | |
270 | { | |
271 | __uint64_t space; | |
272 | ||
273 | dqp->q_prealloc_hi_wmark = be64_to_cpu(dqp->q_core.d_blk_hardlimit); | |
274 | dqp->q_prealloc_lo_wmark = be64_to_cpu(dqp->q_core.d_blk_softlimit); | |
275 | if (!dqp->q_prealloc_lo_wmark) { | |
276 | dqp->q_prealloc_lo_wmark = dqp->q_prealloc_hi_wmark; | |
277 | do_div(dqp->q_prealloc_lo_wmark, 100); | |
278 | dqp->q_prealloc_lo_wmark *= 95; | |
279 | } | |
280 | ||
281 | space = dqp->q_prealloc_hi_wmark; | |
282 | ||
283 | do_div(space, 100); | |
284 | dqp->q_low_space[XFS_QLOWSP_1_PCNT] = space; | |
285 | dqp->q_low_space[XFS_QLOWSP_3_PCNT] = space * 3; | |
286 | dqp->q_low_space[XFS_QLOWSP_5_PCNT] = space * 5; | |
287 | } | |
288 | ||
3fe58f30 CH |
289 | STATIC void |
290 | xfs_dquot_buf_calc_crc( | |
291 | struct xfs_mount *mp, | |
292 | struct xfs_buf *bp) | |
293 | { | |
294 | struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr; | |
295 | int i; | |
296 | ||
297 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
298 | return; | |
299 | ||
300 | for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++, d++) { | |
301 | xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk), | |
302 | offsetof(struct xfs_dqblk, dd_crc)); | |
303 | } | |
304 | } | |
305 | ||
306 | STATIC bool | |
307 | xfs_dquot_buf_verify_crc( | |
308 | struct xfs_mount *mp, | |
309 | struct xfs_buf *bp) | |
310 | { | |
311 | struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr; | |
312 | int ndquots; | |
313 | int i; | |
314 | ||
315 | if (!xfs_sb_version_hascrc(&mp->m_sb)) | |
316 | return true; | |
317 | ||
318 | /* | |
319 | * if we are in log recovery, the quota subsystem has not been | |
320 | * initialised so we have no quotainfo structure. In that case, we need | |
321 | * to manually calculate the number of dquots in the buffer. | |
322 | */ | |
323 | if (mp->m_quotainfo) | |
324 | ndquots = mp->m_quotainfo->qi_dqperchunk; | |
325 | else | |
326 | ndquots = xfs_qm_calc_dquots_per_chunk(mp, | |
327 | XFS_BB_TO_FSB(mp, bp->b_length)); | |
328 | ||
329 | for (i = 0; i < ndquots; i++, d++) { | |
330 | if (!xfs_verify_cksum((char *)d, sizeof(struct xfs_dqblk), | |
331 | offsetof(struct xfs_dqblk, dd_crc))) | |
332 | return false; | |
333 | if (!uuid_equal(&d->dd_uuid, &mp->m_sb.sb_uuid)) | |
334 | return false; | |
335 | } | |
336 | ||
337 | return true; | |
338 | } | |
339 | ||
340 | STATIC bool | |
b0f539de | 341 | xfs_dquot_buf_verify( |
3fe58f30 | 342 | struct xfs_mount *mp, |
b0f539de DC |
343 | struct xfs_buf *bp) |
344 | { | |
b0f539de | 345 | struct xfs_dqblk *d = (struct xfs_dqblk *)bp->b_addr; |
b0f539de | 346 | xfs_dqid_t id = 0; |
3fe58f30 | 347 | int ndquots; |
b0f539de DC |
348 | int i; |
349 | ||
3fe58f30 CH |
350 | /* |
351 | * if we are in log recovery, the quota subsystem has not been | |
352 | * initialised so we have no quotainfo structure. In that case, we need | |
353 | * to manually calculate the number of dquots in the buffer. | |
354 | */ | |
355 | if (mp->m_quotainfo) | |
356 | ndquots = mp->m_quotainfo->qi_dqperchunk; | |
357 | else | |
358 | ndquots = xfs_qm_calc_dquots_per_chunk(mp, bp->b_length); | |
359 | ||
b0f539de DC |
360 | /* |
361 | * On the first read of the buffer, verify that each dquot is valid. | |
362 | * We don't know what the id of the dquot is supposed to be, just that | |
363 | * they should be increasing monotonically within the buffer. If the | |
364 | * first id is corrupt, then it will fail on the second dquot in the | |
365 | * buffer so corruptions could point to the wrong dquot in this case. | |
366 | */ | |
3fe58f30 CH |
367 | for (i = 0; i < ndquots; i++) { |
368 | struct xfs_disk_dquot *ddq; | |
369 | int error; | |
b0f539de DC |
370 | |
371 | ddq = &d[i].dd_diskdq; | |
372 | ||
373 | if (i == 0) | |
374 | id = be32_to_cpu(ddq->d_id); | |
375 | ||
376 | error = xfs_qm_dqcheck(mp, ddq, id + i, 0, XFS_QMOPT_DOWARN, | |
3fe58f30 CH |
377 | "xfs_dquot_buf_verify"); |
378 | if (error) | |
379 | return false; | |
b0f539de | 380 | } |
3fe58f30 | 381 | return true; |
b0f539de DC |
382 | } |
383 | ||
384 | static void | |
1813dd64 | 385 | xfs_dquot_buf_read_verify( |
b0f539de DC |
386 | struct xfs_buf *bp) |
387 | { | |
3fe58f30 CH |
388 | struct xfs_mount *mp = bp->b_target->bt_mount; |
389 | ||
390 | if (!xfs_dquot_buf_verify_crc(mp, bp) || !xfs_dquot_buf_verify(mp, bp)) { | |
391 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); | |
392 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
393 | } | |
b0f539de | 394 | } |
1da177e4 | 395 | |
b0f539de | 396 | void |
1813dd64 | 397 | xfs_dquot_buf_write_verify( |
b0f539de DC |
398 | struct xfs_buf *bp) |
399 | { | |
3fe58f30 CH |
400 | struct xfs_mount *mp = bp->b_target->bt_mount; |
401 | ||
402 | if (!xfs_dquot_buf_verify(mp, bp)) { | |
403 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); | |
404 | xfs_buf_ioerror(bp, EFSCORRUPTED); | |
405 | return; | |
406 | } | |
407 | xfs_dquot_buf_calc_crc(mp, bp); | |
b0f539de | 408 | } |
1da177e4 | 409 | |
1813dd64 DC |
410 | const struct xfs_buf_ops xfs_dquot_buf_ops = { |
411 | .verify_read = xfs_dquot_buf_read_verify, | |
412 | .verify_write = xfs_dquot_buf_write_verify, | |
413 | }; | |
414 | ||
1da177e4 LT |
415 | /* |
416 | * Allocate a block and fill it with dquots. | |
417 | * This is called when the bmapi finds a hole. | |
418 | */ | |
419 | STATIC int | |
420 | xfs_qm_dqalloc( | |
efa092f3 | 421 | xfs_trans_t **tpp, |
1da177e4 LT |
422 | xfs_mount_t *mp, |
423 | xfs_dquot_t *dqp, | |
424 | xfs_inode_t *quotip, | |
425 | xfs_fileoff_t offset_fsb, | |
426 | xfs_buf_t **O_bpp) | |
427 | { | |
428 | xfs_fsblock_t firstblock; | |
429 | xfs_bmap_free_t flist; | |
430 | xfs_bmbt_irec_t map; | |
431 | int nmaps, error, committed; | |
432 | xfs_buf_t *bp; | |
efa092f3 | 433 | xfs_trans_t *tp = *tpp; |
1da177e4 LT |
434 | |
435 | ASSERT(tp != NULL); | |
0b1b213f CH |
436 | |
437 | trace_xfs_dqalloc(dqp); | |
1da177e4 LT |
438 | |
439 | /* | |
440 | * Initialize the bmap freelist prior to calling bmapi code. | |
441 | */ | |
9d87c319 | 442 | xfs_bmap_init(&flist, &firstblock); |
1da177e4 LT |
443 | xfs_ilock(quotip, XFS_ILOCK_EXCL); |
444 | /* | |
445 | * Return if this type of quotas is turned off while we didn't | |
446 | * have an inode lock | |
447 | */ | |
6967b964 | 448 | if (!xfs_this_quota_on(dqp->q_mount, dqp->dq_flags)) { |
1da177e4 LT |
449 | xfs_iunlock(quotip, XFS_ILOCK_EXCL); |
450 | return (ESRCH); | |
451 | } | |
452 | ||
ddc3415a | 453 | xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL); |
1da177e4 | 454 | nmaps = 1; |
c0dc7828 DC |
455 | error = xfs_bmapi_write(tp, quotip, offset_fsb, |
456 | XFS_DQUOT_CLUSTER_SIZE_FSB, XFS_BMAPI_METADATA, | |
457 | &firstblock, XFS_QM_DQALLOC_SPACE_RES(mp), | |
458 | &map, &nmaps, &flist); | |
459 | if (error) | |
1da177e4 | 460 | goto error0; |
1da177e4 LT |
461 | ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB); |
462 | ASSERT(nmaps == 1); | |
463 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && | |
464 | (map.br_startblock != HOLESTARTBLOCK)); | |
465 | ||
466 | /* | |
467 | * Keep track of the blkno to save a lookup later | |
468 | */ | |
469 | dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock); | |
470 | ||
471 | /* now we can just get the buffer (there's nothing to read yet) */ | |
472 | bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, | |
473 | dqp->q_blkno, | |
8a7b8a89 | 474 | mp->m_quotainfo->qi_dqchunklen, |
1da177e4 | 475 | 0); |
2a30f36d CS |
476 | |
477 | error = xfs_buf_geterror(bp); | |
478 | if (error) | |
1da177e4 | 479 | goto error1; |
1813dd64 | 480 | bp->b_ops = &xfs_dquot_buf_ops; |
2a30f36d | 481 | |
1da177e4 LT |
482 | /* |
483 | * Make a chunk of dquots out of this buffer and log | |
484 | * the entire thing. | |
485 | */ | |
1149d96a | 486 | xfs_qm_init_dquot_blk(tp, mp, be32_to_cpu(dqp->q_core.d_id), |
c8ad20ff | 487 | dqp->dq_flags & XFS_DQ_ALLTYPES, bp); |
1da177e4 | 488 | |
efa092f3 TS |
489 | /* |
490 | * xfs_bmap_finish() may commit the current transaction and | |
491 | * start a second transaction if the freelist is not empty. | |
492 | * | |
493 | * Since we still want to modify this buffer, we need to | |
494 | * ensure that the buffer is not released on commit of | |
495 | * the first transaction and ensure the buffer is added to the | |
496 | * second transaction. | |
497 | * | |
498 | * If there is only one transaction then don't stop the buffer | |
499 | * from being released when it commits later on. | |
500 | */ | |
501 | ||
502 | xfs_trans_bhold(tp, bp); | |
503 | ||
f7c99b6f | 504 | if ((error = xfs_bmap_finish(tpp, &flist, &committed))) { |
1da177e4 LT |
505 | goto error1; |
506 | } | |
507 | ||
efa092f3 TS |
508 | if (committed) { |
509 | tp = *tpp; | |
510 | xfs_trans_bjoin(tp, bp); | |
511 | } else { | |
512 | xfs_trans_bhold_release(tp, bp); | |
513 | } | |
514 | ||
1da177e4 LT |
515 | *O_bpp = bp; |
516 | return 0; | |
517 | ||
518 | error1: | |
519 | xfs_bmap_cancel(&flist); | |
520 | error0: | |
521 | xfs_iunlock(quotip, XFS_ILOCK_EXCL); | |
522 | ||
523 | return (error); | |
524 | } | |
c6319198 DC |
525 | STATIC int |
526 | xfs_qm_dqrepair( | |
527 | struct xfs_mount *mp, | |
528 | struct xfs_trans *tp, | |
529 | struct xfs_dquot *dqp, | |
530 | xfs_dqid_t firstid, | |
531 | struct xfs_buf **bpp) | |
532 | { | |
533 | int error; | |
534 | struct xfs_disk_dquot *ddq; | |
535 | struct xfs_dqblk *d; | |
536 | int i; | |
537 | ||
538 | /* | |
539 | * Read the buffer without verification so we get the corrupted | |
612cfbfe | 540 | * buffer returned to us. make sure we verify it on write, though. |
c6319198 DC |
541 | */ |
542 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, dqp->q_blkno, | |
543 | mp->m_quotainfo->qi_dqchunklen, | |
544 | 0, bpp, NULL); | |
545 | ||
546 | if (error) { | |
547 | ASSERT(*bpp == NULL); | |
548 | return XFS_ERROR(error); | |
549 | } | |
1813dd64 | 550 | (*bpp)->b_ops = &xfs_dquot_buf_ops; |
c6319198 DC |
551 | |
552 | ASSERT(xfs_buf_islocked(*bpp)); | |
553 | d = (struct xfs_dqblk *)(*bpp)->b_addr; | |
554 | ||
555 | /* Do the actual repair of dquots in this buffer */ | |
556 | for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) { | |
557 | ddq = &d[i].dd_diskdq; | |
558 | error = xfs_qm_dqcheck(mp, ddq, firstid + i, | |
559 | dqp->dq_flags & XFS_DQ_ALLTYPES, | |
560 | XFS_QMOPT_DQREPAIR, "xfs_qm_dqrepair"); | |
561 | if (error) { | |
562 | /* repair failed, we're screwed */ | |
563 | xfs_trans_brelse(tp, *bpp); | |
564 | return XFS_ERROR(EIO); | |
565 | } | |
566 | } | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
1da177e4 LT |
571 | /* |
572 | * Maps a dquot to the buffer containing its on-disk version. | |
573 | * This returns a ptr to the buffer containing the on-disk dquot | |
574 | * in the bpp param, and a ptr to the on-disk dquot within that buffer | |
575 | */ | |
576 | STATIC int | |
577 | xfs_qm_dqtobp( | |
efa092f3 | 578 | xfs_trans_t **tpp, |
1da177e4 LT |
579 | xfs_dquot_t *dqp, |
580 | xfs_disk_dquot_t **O_ddpp, | |
581 | xfs_buf_t **O_bpp, | |
582 | uint flags) | |
583 | { | |
584 | xfs_bmbt_irec_t map; | |
acecf1b5 | 585 | int nmaps = 1, error; |
1da177e4 | 586 | xfs_buf_t *bp; |
acecf1b5 CH |
587 | xfs_inode_t *quotip = XFS_DQ_TO_QIP(dqp); |
588 | xfs_mount_t *mp = dqp->q_mount; | |
acecf1b5 | 589 | xfs_dqid_t id = be32_to_cpu(dqp->q_core.d_id); |
efa092f3 | 590 | xfs_trans_t *tp = (tpp ? *tpp : NULL); |
1da177e4 | 591 | |
acecf1b5 | 592 | dqp->q_fileoffset = (xfs_fileoff_t)id / mp->m_quotainfo->qi_dqperchunk; |
1da177e4 | 593 | |
acecf1b5 | 594 | xfs_ilock(quotip, XFS_ILOCK_SHARED); |
6967b964 | 595 | if (!xfs_this_quota_on(dqp->q_mount, dqp->dq_flags)) { |
1da177e4 | 596 | /* |
acecf1b5 CH |
597 | * Return if this type of quotas is turned off while we |
598 | * didn't have the quota inode lock. | |
1da177e4 | 599 | */ |
acecf1b5 CH |
600 | xfs_iunlock(quotip, XFS_ILOCK_SHARED); |
601 | return ESRCH; | |
602 | } | |
603 | ||
604 | /* | |
605 | * Find the block map; no allocations yet | |
606 | */ | |
5c8ed202 DC |
607 | error = xfs_bmapi_read(quotip, dqp->q_fileoffset, |
608 | XFS_DQUOT_CLUSTER_SIZE_FSB, &map, &nmaps, 0); | |
acecf1b5 CH |
609 | |
610 | xfs_iunlock(quotip, XFS_ILOCK_SHARED); | |
611 | if (error) | |
612 | return error; | |
613 | ||
614 | ASSERT(nmaps == 1); | |
615 | ASSERT(map.br_blockcount == 1); | |
616 | ||
617 | /* | |
618 | * Offset of dquot in the (fixed sized) dquot chunk. | |
619 | */ | |
620 | dqp->q_bufoffset = (id % mp->m_quotainfo->qi_dqperchunk) * | |
621 | sizeof(xfs_dqblk_t); | |
622 | ||
623 | ASSERT(map.br_startblock != DELAYSTARTBLOCK); | |
624 | if (map.br_startblock == HOLESTARTBLOCK) { | |
1da177e4 | 625 | /* |
acecf1b5 | 626 | * We don't allocate unless we're asked to |
1da177e4 | 627 | */ |
acecf1b5 CH |
628 | if (!(flags & XFS_QMOPT_DQALLOC)) |
629 | return ENOENT; | |
1da177e4 | 630 | |
acecf1b5 CH |
631 | ASSERT(tp); |
632 | error = xfs_qm_dqalloc(tpp, mp, dqp, quotip, | |
633 | dqp->q_fileoffset, &bp); | |
1da177e4 | 634 | if (error) |
acecf1b5 CH |
635 | return error; |
636 | tp = *tpp; | |
637 | } else { | |
638 | trace_xfs_dqtobp_read(dqp); | |
1da177e4 LT |
639 | |
640 | /* | |
acecf1b5 CH |
641 | * store the blkno etc so that we don't have to do the |
642 | * mapping all the time | |
1da177e4 | 643 | */ |
acecf1b5 | 644 | dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock); |
0b1b213f | 645 | |
8a7b8a89 CH |
646 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, |
647 | dqp->q_blkno, | |
648 | mp->m_quotainfo->qi_dqchunklen, | |
1813dd64 | 649 | 0, &bp, &xfs_dquot_buf_ops); |
acecf1b5 | 650 | |
c6319198 DC |
651 | if (error == EFSCORRUPTED && (flags & XFS_QMOPT_DQREPAIR)) { |
652 | xfs_dqid_t firstid = (xfs_dqid_t)map.br_startoff * | |
653 | mp->m_quotainfo->qi_dqperchunk; | |
654 | ASSERT(bp == NULL); | |
655 | error = xfs_qm_dqrepair(mp, tp, dqp, firstid, &bp); | |
656 | } | |
1da177e4 | 657 | |
c6319198 DC |
658 | if (error) { |
659 | ASSERT(bp == NULL); | |
660 | return XFS_ERROR(error); | |
1da177e4 | 661 | } |
1da177e4 LT |
662 | } |
663 | ||
c6319198 | 664 | ASSERT(xfs_buf_islocked(bp)); |
1da177e4 | 665 | *O_bpp = bp; |
c6319198 | 666 | *O_ddpp = bp->b_addr + dqp->q_bufoffset; |
1da177e4 LT |
667 | |
668 | return (0); | |
669 | } | |
670 | ||
671 | ||
672 | /* | |
673 | * Read in the ondisk dquot using dqtobp() then copy it to an incore version, | |
674 | * and release the buffer immediately. | |
675 | * | |
97e7ade5 | 676 | * If XFS_QMOPT_DQALLOC is set, allocate a dquot on disk if it needed. |
1da177e4 | 677 | */ |
7ae44407 | 678 | int |
1da177e4 | 679 | xfs_qm_dqread( |
97e7ade5 CH |
680 | struct xfs_mount *mp, |
681 | xfs_dqid_t id, | |
682 | uint type, | |
683 | uint flags, | |
684 | struct xfs_dquot **O_dqpp) | |
1da177e4 | 685 | { |
97e7ade5 CH |
686 | struct xfs_dquot *dqp; |
687 | struct xfs_disk_dquot *ddqp; | |
688 | struct xfs_buf *bp; | |
689 | struct xfs_trans *tp = NULL; | |
690 | int error; | |
691 | int cancelflags = 0; | |
efa092f3 | 692 | |
92b2e5b3 | 693 | |
a05931ce | 694 | dqp = kmem_zone_zalloc(xfs_qm_dqzone, KM_SLEEP); |
92b2e5b3 CH |
695 | |
696 | dqp->dq_flags = type; | |
697 | dqp->q_core.d_id = cpu_to_be32(id); | |
698 | dqp->q_mount = mp; | |
f8739c3c | 699 | INIT_LIST_HEAD(&dqp->q_lru); |
92b2e5b3 CH |
700 | mutex_init(&dqp->q_qlock); |
701 | init_waitqueue_head(&dqp->q_pinwait); | |
702 | ||
703 | /* | |
704 | * Because we want to use a counting completion, complete | |
705 | * the flush completion once to allow a single access to | |
706 | * the flush completion without blocking. | |
707 | */ | |
708 | init_completion(&dqp->q_flush); | |
709 | complete(&dqp->q_flush); | |
710 | ||
711 | /* | |
712 | * Make sure group quotas have a different lock class than user | |
713 | * quotas. | |
714 | */ | |
715 | if (!(type & XFS_DQ_USER)) | |
716 | lockdep_set_class(&dqp->q_qlock, &xfs_dquot_other_class); | |
717 | ||
48776fd2 | 718 | XFS_STATS_INC(xs_qm_dquot); |
1da177e4 | 719 | |
0b1b213f CH |
720 | trace_xfs_dqread(dqp); |
721 | ||
97e7ade5 CH |
722 | if (flags & XFS_QMOPT_DQALLOC) { |
723 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC); | |
724 | error = xfs_trans_reserve(tp, XFS_QM_DQALLOC_SPACE_RES(mp), | |
48001044 JL |
725 | XFS_QM_DQALLOC_LOG_RES(mp), 0, |
726 | XFS_TRANS_PERM_LOG_RES, | |
727 | XFS_WRITE_LOG_COUNT); | |
97e7ade5 CH |
728 | if (error) |
729 | goto error1; | |
730 | cancelflags = XFS_TRANS_RELEASE_LOG_RES; | |
731 | } | |
732 | ||
1da177e4 LT |
733 | /* |
734 | * get a pointer to the on-disk dquot and the buffer containing it | |
735 | * dqp already knows its own type (GROUP/USER). | |
736 | */ | |
97e7ade5 CH |
737 | error = xfs_qm_dqtobp(&tp, dqp, &ddqp, &bp, flags); |
738 | if (error) { | |
739 | /* | |
740 | * This can happen if quotas got turned off (ESRCH), | |
741 | * or if the dquot didn't exist on disk and we ask to | |
742 | * allocate (ENOENT). | |
743 | */ | |
744 | trace_xfs_dqread_fail(dqp); | |
745 | cancelflags |= XFS_TRANS_ABORT; | |
746 | goto error1; | |
1da177e4 LT |
747 | } |
748 | ||
749 | /* copy everything from disk dquot to the incore dquot */ | |
750 | memcpy(&dqp->q_core, ddqp, sizeof(xfs_disk_dquot_t)); | |
1da177e4 LT |
751 | xfs_qm_dquot_logitem_init(dqp); |
752 | ||
753 | /* | |
754 | * Reservation counters are defined as reservation plus current usage | |
25985edc | 755 | * to avoid having to add every time. |
1da177e4 | 756 | */ |
1149d96a CH |
757 | dqp->q_res_bcount = be64_to_cpu(ddqp->d_bcount); |
758 | dqp->q_res_icount = be64_to_cpu(ddqp->d_icount); | |
759 | dqp->q_res_rtbcount = be64_to_cpu(ddqp->d_rtbcount); | |
1da177e4 | 760 | |
b1366451 BF |
761 | /* initialize the dquot speculative prealloc thresholds */ |
762 | xfs_dquot_set_prealloc_limits(dqp); | |
763 | ||
1da177e4 | 764 | /* Mark the buf so that this will stay incore a little longer */ |
38f23232 | 765 | xfs_buf_set_ref(bp, XFS_DQUOT_REF); |
1da177e4 LT |
766 | |
767 | /* | |
768 | * We got the buffer with a xfs_trans_read_buf() (in dqtobp()) | |
769 | * So we need to release with xfs_trans_brelse(). | |
770 | * The strategy here is identical to that of inodes; we lock | |
771 | * the dquot in xfs_qm_dqget() before making it accessible to | |
772 | * others. This is because dquots, like inodes, need a good level of | |
773 | * concurrency, and we don't want to take locks on the entire buffers | |
774 | * for dquot accesses. | |
775 | * Note also that the dquot buffer may even be dirty at this point, if | |
776 | * this particular dquot was repaired. We still aren't afraid to | |
777 | * brelse it because we have the changes incore. | |
778 | */ | |
0c842ad4 | 779 | ASSERT(xfs_buf_islocked(bp)); |
1da177e4 LT |
780 | xfs_trans_brelse(tp, bp); |
781 | ||
1da177e4 | 782 | if (tp) { |
97e7ade5 CH |
783 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
784 | if (error) | |
785 | goto error0; | |
1da177e4 LT |
786 | } |
787 | ||
788 | *O_dqpp = dqp; | |
97e7ade5 | 789 | return error; |
1da177e4 | 790 | |
97e7ade5 | 791 | error1: |
1da177e4 LT |
792 | if (tp) |
793 | xfs_trans_cancel(tp, cancelflags); | |
97e7ade5 | 794 | error0: |
1da177e4 LT |
795 | xfs_qm_dqdestroy(dqp); |
796 | *O_dqpp = NULL; | |
97e7ade5 | 797 | return error; |
1da177e4 LT |
798 | } |
799 | ||
1da177e4 LT |
800 | /* |
801 | * Given the file system, inode OR id, and type (UDQUOT/GDQUOT), return a | |
802 | * a locked dquot, doing an allocation (if requested) as needed. | |
803 | * When both an inode and an id are given, the inode's id takes precedence. | |
804 | * That is, if the id changes while we don't hold the ilock inside this | |
805 | * function, the new dquot is returned, not necessarily the one requested | |
806 | * in the id argument. | |
807 | */ | |
808 | int | |
809 | xfs_qm_dqget( | |
810 | xfs_mount_t *mp, | |
811 | xfs_inode_t *ip, /* locked inode (optional) */ | |
c8ad20ff NS |
812 | xfs_dqid_t id, /* uid/projid/gid depending on type */ |
813 | uint type, /* XFS_DQ_USER/XFS_DQ_PROJ/XFS_DQ_GROUP */ | |
1da177e4 LT |
814 | uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */ |
815 | xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */ | |
816 | { | |
9f920f11 CH |
817 | struct xfs_quotainfo *qi = mp->m_quotainfo; |
818 | struct radix_tree_root *tree = XFS_DQUOT_TREE(qi, type); | |
819 | struct xfs_dquot *dqp; | |
820 | int error; | |
1da177e4 LT |
821 | |
822 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
823 | if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) || | |
c8ad20ff | 824 | (! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ) || |
1da177e4 LT |
825 | (! XFS_IS_GQUOTA_ON(mp) && type == XFS_DQ_GROUP)) { |
826 | return (ESRCH); | |
827 | } | |
1da177e4 LT |
828 | |
829 | #ifdef DEBUG | |
830 | if (xfs_do_dqerror) { | |
831 | if ((xfs_dqerror_target == mp->m_ddev_targp) && | |
832 | (xfs_dqreq_num++ % xfs_dqerror_mod) == 0) { | |
0b932ccc | 833 | xfs_debug(mp, "Returning error in dqget"); |
1da177e4 LT |
834 | return (EIO); |
835 | } | |
836 | } | |
1da177e4 | 837 | |
c8ad20ff NS |
838 | ASSERT(type == XFS_DQ_USER || |
839 | type == XFS_DQ_PROJ || | |
840 | type == XFS_DQ_GROUP); | |
1da177e4 | 841 | if (ip) { |
579aa9ca | 842 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
36731410 | 843 | ASSERT(xfs_inode_dquot(ip, type) == NULL); |
1da177e4 LT |
844 | } |
845 | #endif | |
92678554 CH |
846 | |
847 | restart: | |
9f920f11 CH |
848 | mutex_lock(&qi->qi_tree_lock); |
849 | dqp = radix_tree_lookup(tree, id); | |
850 | if (dqp) { | |
851 | xfs_dqlock(dqp); | |
852 | if (dqp->dq_flags & XFS_DQ_FREEING) { | |
853 | xfs_dqunlock(dqp); | |
854 | mutex_unlock(&qi->qi_tree_lock); | |
855 | trace_xfs_dqget_freeing(dqp); | |
856 | delay(1); | |
857 | goto restart; | |
858 | } | |
1da177e4 | 859 | |
9f920f11 CH |
860 | dqp->q_nrefs++; |
861 | mutex_unlock(&qi->qi_tree_lock); | |
862 | ||
863 | trace_xfs_dqget_hit(dqp); | |
48776fd2 | 864 | XFS_STATS_INC(xs_qm_dqcachehits); |
9f920f11 CH |
865 | *O_dqpp = dqp; |
866 | return 0; | |
1da177e4 | 867 | } |
9f920f11 CH |
868 | mutex_unlock(&qi->qi_tree_lock); |
869 | XFS_STATS_INC(xs_qm_dqcachemisses); | |
1da177e4 LT |
870 | |
871 | /* | |
872 | * Dquot cache miss. We don't want to keep the inode lock across | |
873 | * a (potential) disk read. Also we don't want to deal with the lock | |
874 | * ordering between quotainode and this inode. OTOH, dropping the inode | |
875 | * lock here means dealing with a chown that can happen before | |
876 | * we re-acquire the lock. | |
877 | */ | |
878 | if (ip) | |
879 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1da177e4 | 880 | |
97e7ade5 | 881 | error = xfs_qm_dqread(mp, id, type, flags, &dqp); |
1da177e4 | 882 | |
7ae44407 CH |
883 | if (ip) |
884 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
885 | ||
886 | if (error) | |
887 | return error; | |
1da177e4 | 888 | |
1da177e4 | 889 | if (ip) { |
1da177e4 LT |
890 | /* |
891 | * A dquot could be attached to this inode by now, since | |
892 | * we had dropped the ilock. | |
893 | */ | |
36731410 | 894 | if (xfs_this_quota_on(mp, type)) { |
9f920f11 CH |
895 | struct xfs_dquot *dqp1; |
896 | ||
36731410 CS |
897 | dqp1 = xfs_inode_dquot(ip, type); |
898 | if (dqp1) { | |
1da177e4 | 899 | xfs_qm_dqdestroy(dqp); |
36731410 | 900 | dqp = dqp1; |
1da177e4 LT |
901 | xfs_dqlock(dqp); |
902 | goto dqret; | |
903 | } | |
904 | } else { | |
36731410 CS |
905 | /* inode stays locked on return */ |
906 | xfs_qm_dqdestroy(dqp); | |
907 | return XFS_ERROR(ESRCH); | |
1da177e4 LT |
908 | } |
909 | } | |
910 | ||
9f920f11 CH |
911 | mutex_lock(&qi->qi_tree_lock); |
912 | error = -radix_tree_insert(tree, id, dqp); | |
913 | if (unlikely(error)) { | |
914 | WARN_ON(error != EEXIST); | |
915 | ||
1da177e4 | 916 | /* |
9f920f11 CH |
917 | * Duplicate found. Just throw away the new dquot and start |
918 | * over. | |
1da177e4 | 919 | */ |
9f920f11 CH |
920 | mutex_unlock(&qi->qi_tree_lock); |
921 | trace_xfs_dqget_dup(dqp); | |
922 | xfs_qm_dqdestroy(dqp); | |
923 | XFS_STATS_INC(xs_qm_dquot_dups); | |
924 | goto restart; | |
1da177e4 LT |
925 | } |
926 | ||
1da177e4 LT |
927 | /* |
928 | * We return a locked dquot to the caller, with a reference taken | |
929 | */ | |
930 | xfs_dqlock(dqp); | |
931 | dqp->q_nrefs = 1; | |
932 | ||
9f920f11 | 933 | qi->qi_dquots++; |
9f920f11 CH |
934 | mutex_unlock(&qi->qi_tree_lock); |
935 | ||
1da177e4 | 936 | dqret: |
579aa9ca | 937 | ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
0b1b213f | 938 | trace_xfs_dqget_miss(dqp); |
1da177e4 LT |
939 | *O_dqpp = dqp; |
940 | return (0); | |
941 | } | |
942 | ||
943 | ||
f8739c3c CH |
944 | STATIC void |
945 | xfs_qm_dqput_final( | |
bf72de31 | 946 | struct xfs_dquot *dqp) |
1da177e4 | 947 | { |
f8739c3c | 948 | struct xfs_quotainfo *qi = dqp->q_mount->m_quotainfo; |
bf72de31 | 949 | struct xfs_dquot *gdqp; |
1da177e4 | 950 | |
bf72de31 CH |
951 | trace_xfs_dqput_free(dqp); |
952 | ||
f8739c3c CH |
953 | mutex_lock(&qi->qi_lru_lock); |
954 | if (list_empty(&dqp->q_lru)) { | |
955 | list_add_tail(&dqp->q_lru, &qi->qi_lru_list); | |
956 | qi->qi_lru_count++; | |
48776fd2 | 957 | XFS_STATS_INC(xs_qm_dquot_unused); |
bf72de31 | 958 | } |
f8739c3c | 959 | mutex_unlock(&qi->qi_lru_lock); |
bf72de31 | 960 | |
1da177e4 | 961 | /* |
bf72de31 CH |
962 | * If we just added a udquot to the freelist, then we want to release |
963 | * the gdquot reference that it (probably) has. Otherwise it'll keep | |
964 | * the gdquot from getting reclaimed. | |
1da177e4 | 965 | */ |
bf72de31 CH |
966 | gdqp = dqp->q_gdquot; |
967 | if (gdqp) { | |
968 | xfs_dqlock(gdqp); | |
969 | dqp->q_gdquot = NULL; | |
1da177e4 | 970 | } |
bf72de31 | 971 | xfs_dqunlock(dqp); |
1da177e4 | 972 | |
bf72de31 CH |
973 | /* |
974 | * If we had a group quota hint, release it now. | |
975 | */ | |
f8739c3c CH |
976 | if (gdqp) |
977 | xfs_qm_dqput(gdqp); | |
978 | } | |
979 | ||
980 | /* | |
981 | * Release a reference to the dquot (decrement ref-count) and unlock it. | |
982 | * | |
983 | * If there is a group quota attached to this dquot, carefully release that | |
984 | * too without tripping over deadlocks'n'stuff. | |
985 | */ | |
986 | void | |
987 | xfs_qm_dqput( | |
988 | struct xfs_dquot *dqp) | |
989 | { | |
990 | ASSERT(dqp->q_nrefs > 0); | |
991 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
992 | ||
993 | trace_xfs_dqput(dqp); | |
994 | ||
995 | if (--dqp->q_nrefs > 0) | |
996 | xfs_dqunlock(dqp); | |
997 | else | |
998 | xfs_qm_dqput_final(dqp); | |
1da177e4 LT |
999 | } |
1000 | ||
1001 | /* | |
1002 | * Release a dquot. Flush it if dirty, then dqput() it. | |
1003 | * dquot must not be locked. | |
1004 | */ | |
1005 | void | |
1006 | xfs_qm_dqrele( | |
1007 | xfs_dquot_t *dqp) | |
1008 | { | |
7d095257 CH |
1009 | if (!dqp) |
1010 | return; | |
1011 | ||
0b1b213f | 1012 | trace_xfs_dqrele(dqp); |
1da177e4 LT |
1013 | |
1014 | xfs_dqlock(dqp); | |
1015 | /* | |
1016 | * We don't care to flush it if the dquot is dirty here. | |
1017 | * That will create stutters that we want to avoid. | |
1018 | * Instead we do a delayed write when we try to reclaim | |
1019 | * a dirty dquot. Also xfs_sync will take part of the burden... | |
1020 | */ | |
1021 | xfs_qm_dqput(dqp); | |
1022 | } | |
1023 | ||
ca30b2a7 CH |
1024 | /* |
1025 | * This is the dquot flushing I/O completion routine. It is called | |
1026 | * from interrupt level when the buffer containing the dquot is | |
1027 | * flushed to disk. It is responsible for removing the dquot logitem | |
1028 | * from the AIL if it has not been re-logged, and unlocking the dquot's | |
1029 | * flush lock. This behavior is very similar to that of inodes.. | |
1030 | */ | |
1031 | STATIC void | |
1032 | xfs_qm_dqflush_done( | |
1033 | struct xfs_buf *bp, | |
1034 | struct xfs_log_item *lip) | |
1035 | { | |
1036 | xfs_dq_logitem_t *qip = (struct xfs_dq_logitem *)lip; | |
1037 | xfs_dquot_t *dqp = qip->qli_dquot; | |
1038 | struct xfs_ail *ailp = lip->li_ailp; | |
1039 | ||
1040 | /* | |
1041 | * We only want to pull the item from the AIL if its | |
1042 | * location in the log has not changed since we started the flush. | |
1043 | * Thus, we only bother if the dquot's lsn has | |
1044 | * not changed. First we check the lsn outside the lock | |
1045 | * since it's cheaper, and then we recheck while | |
1046 | * holding the lock before removing the dquot from the AIL. | |
1047 | */ | |
1048 | if ((lip->li_flags & XFS_LI_IN_AIL) && | |
1049 | lip->li_lsn == qip->qli_flush_lsn) { | |
1050 | ||
1051 | /* xfs_trans_ail_delete() drops the AIL lock. */ | |
1052 | spin_lock(&ailp->xa_lock); | |
1053 | if (lip->li_lsn == qip->qli_flush_lsn) | |
04913fdd | 1054 | xfs_trans_ail_delete(ailp, lip, SHUTDOWN_CORRUPT_INCORE); |
ca30b2a7 CH |
1055 | else |
1056 | spin_unlock(&ailp->xa_lock); | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * Release the dq's flush lock since we're done with it. | |
1061 | */ | |
1062 | xfs_dqfunlock(dqp); | |
1063 | } | |
1da177e4 LT |
1064 | |
1065 | /* | |
1066 | * Write a modified dquot to disk. | |
1067 | * The dquot must be locked and the flush lock too taken by caller. | |
1068 | * The flush lock will not be unlocked until the dquot reaches the disk, | |
1069 | * but the dquot is free to be unlocked and modified by the caller | |
1070 | * in the interim. Dquot is still locked on return. This behavior is | |
1071 | * identical to that of inodes. | |
1072 | */ | |
1073 | int | |
1074 | xfs_qm_dqflush( | |
fe7257fd CH |
1075 | struct xfs_dquot *dqp, |
1076 | struct xfs_buf **bpp) | |
1da177e4 | 1077 | { |
acecf1b5 CH |
1078 | struct xfs_mount *mp = dqp->q_mount; |
1079 | struct xfs_buf *bp; | |
1080 | struct xfs_disk_dquot *ddqp; | |
1da177e4 | 1081 | int error; |
1da177e4 LT |
1082 | |
1083 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
e1f49cf2 | 1084 | ASSERT(!completion_done(&dqp->q_flush)); |
acecf1b5 | 1085 | |
0b1b213f | 1086 | trace_xfs_dqflush(dqp); |
1da177e4 | 1087 | |
fe7257fd CH |
1088 | *bpp = NULL; |
1089 | ||
1da177e4 LT |
1090 | xfs_qm_dqunpin_wait(dqp); |
1091 | ||
1092 | /* | |
1093 | * This may have been unpinned because the filesystem is shutting | |
1094 | * down forcibly. If that's the case we must not write this dquot | |
dea96095 CH |
1095 | * to disk, because the log record didn't make it to disk. |
1096 | * | |
1097 | * We also have to remove the log item from the AIL in this case, | |
1098 | * as we wait for an emptry AIL as part of the unmount process. | |
1da177e4 | 1099 | */ |
acecf1b5 | 1100 | if (XFS_FORCED_SHUTDOWN(mp)) { |
dea96095 | 1101 | struct xfs_log_item *lip = &dqp->q_logitem.qli_item; |
acecf1b5 | 1102 | dqp->dq_flags &= ~XFS_DQ_DIRTY; |
dea96095 CH |
1103 | |
1104 | spin_lock(&mp->m_ail->xa_lock); | |
1105 | if (lip->li_flags & XFS_LI_IN_AIL) | |
04913fdd DC |
1106 | xfs_trans_ail_delete(mp->m_ail, lip, |
1107 | SHUTDOWN_CORRUPT_INCORE); | |
dea96095 CH |
1108 | else |
1109 | spin_unlock(&mp->m_ail->xa_lock); | |
fe7257fd CH |
1110 | error = XFS_ERROR(EIO); |
1111 | goto out_unlock; | |
1da177e4 LT |
1112 | } |
1113 | ||
1114 | /* | |
1115 | * Get the buffer containing the on-disk dquot | |
1da177e4 | 1116 | */ |
acecf1b5 | 1117 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dqp->q_blkno, |
c3f8fc73 | 1118 | mp->m_quotainfo->qi_dqchunklen, 0, &bp, NULL); |
fe7257fd CH |
1119 | if (error) |
1120 | goto out_unlock; | |
1da177e4 | 1121 | |
acecf1b5 CH |
1122 | /* |
1123 | * Calculate the location of the dquot inside the buffer. | |
1124 | */ | |
62926044 | 1125 | ddqp = bp->b_addr + dqp->q_bufoffset; |
acecf1b5 CH |
1126 | |
1127 | /* | |
1128 | * A simple sanity check in case we got a corrupted dquot.. | |
1129 | */ | |
a0fa2b67 DC |
1130 | error = xfs_qm_dqcheck(mp, &dqp->q_core, be32_to_cpu(ddqp->d_id), 0, |
1131 | XFS_QMOPT_DOWARN, "dqflush (incore copy)"); | |
1132 | if (error) { | |
acecf1b5 CH |
1133 | xfs_buf_relse(bp); |
1134 | xfs_dqfunlock(dqp); | |
1135 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); | |
1da177e4 LT |
1136 | return XFS_ERROR(EIO); |
1137 | } | |
1138 | ||
1139 | /* This is the only portion of data that needs to persist */ | |
acecf1b5 | 1140 | memcpy(ddqp, &dqp->q_core, sizeof(xfs_disk_dquot_t)); |
1da177e4 LT |
1141 | |
1142 | /* | |
1143 | * Clear the dirty field and remember the flush lsn for later use. | |
1144 | */ | |
acecf1b5 | 1145 | dqp->dq_flags &= ~XFS_DQ_DIRTY; |
1da177e4 | 1146 | |
7b2e2a31 DC |
1147 | xfs_trans_ail_copy_lsn(mp->m_ail, &dqp->q_logitem.qli_flush_lsn, |
1148 | &dqp->q_logitem.qli_item.li_lsn); | |
1da177e4 | 1149 | |
3fe58f30 CH |
1150 | /* |
1151 | * copy the lsn into the on-disk dquot now while we have the in memory | |
1152 | * dquot here. This can't be done later in the write verifier as we | |
1153 | * can't get access to the log item at that point in time. | |
1154 | */ | |
1155 | if (xfs_sb_version_hascrc(&mp->m_sb)) { | |
1156 | struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddqp; | |
1157 | ||
1158 | dqb->dd_lsn = cpu_to_be64(dqp->q_logitem.qli_item.li_lsn); | |
1159 | } | |
1160 | ||
1da177e4 LT |
1161 | /* |
1162 | * Attach an iodone routine so that we can remove this dquot from the | |
1163 | * AIL and release the flush lock once the dquot is synced to disk. | |
1164 | */ | |
ca30b2a7 CH |
1165 | xfs_buf_attach_iodone(bp, xfs_qm_dqflush_done, |
1166 | &dqp->q_logitem.qli_item); | |
1167 | ||
1da177e4 LT |
1168 | /* |
1169 | * If the buffer is pinned then push on the log so we won't | |
1170 | * get stuck waiting in the write for too long. | |
1171 | */ | |
811e64c7 | 1172 | if (xfs_buf_ispinned(bp)) { |
0b1b213f | 1173 | trace_xfs_dqflush_force(dqp); |
a14a348b | 1174 | xfs_log_force(mp, 0); |
1da177e4 LT |
1175 | } |
1176 | ||
0b1b213f | 1177 | trace_xfs_dqflush_done(dqp); |
fe7257fd CH |
1178 | *bpp = bp; |
1179 | return 0; | |
0b1b213f | 1180 | |
fe7257fd CH |
1181 | out_unlock: |
1182 | xfs_dqfunlock(dqp); | |
1183 | return XFS_ERROR(EIO); | |
1da177e4 LT |
1184 | } |
1185 | ||
5bb87a33 CH |
1186 | /* |
1187 | * Lock two xfs_dquot structures. | |
1188 | * | |
1189 | * To avoid deadlocks we always lock the quota structure with | |
1190 | * the lowerd id first. | |
1191 | */ | |
1da177e4 LT |
1192 | void |
1193 | xfs_dqlock2( | |
1194 | xfs_dquot_t *d1, | |
1195 | xfs_dquot_t *d2) | |
1196 | { | |
1197 | if (d1 && d2) { | |
1198 | ASSERT(d1 != d2); | |
1149d96a CH |
1199 | if (be32_to_cpu(d1->q_core.d_id) > |
1200 | be32_to_cpu(d2->q_core.d_id)) { | |
5bb87a33 CH |
1201 | mutex_lock(&d2->q_qlock); |
1202 | mutex_lock_nested(&d1->q_qlock, XFS_QLOCK_NESTED); | |
1da177e4 | 1203 | } else { |
5bb87a33 CH |
1204 | mutex_lock(&d1->q_qlock); |
1205 | mutex_lock_nested(&d2->q_qlock, XFS_QLOCK_NESTED); | |
1da177e4 | 1206 | } |
5bb87a33 CH |
1207 | } else if (d1) { |
1208 | mutex_lock(&d1->q_qlock); | |
1209 | } else if (d2) { | |
1210 | mutex_lock(&d2->q_qlock); | |
1da177e4 LT |
1211 | } |
1212 | } | |
1213 | ||
a05931ce CH |
1214 | int __init |
1215 | xfs_qm_init(void) | |
1216 | { | |
1217 | xfs_qm_dqzone = | |
1218 | kmem_zone_init(sizeof(struct xfs_dquot), "xfs_dquot"); | |
1219 | if (!xfs_qm_dqzone) | |
1220 | goto out; | |
1221 | ||
1222 | xfs_qm_dqtrxzone = | |
1223 | kmem_zone_init(sizeof(struct xfs_dquot_acct), "xfs_dqtrx"); | |
1224 | if (!xfs_qm_dqtrxzone) | |
1225 | goto out_free_dqzone; | |
1226 | ||
1227 | return 0; | |
1228 | ||
1229 | out_free_dqzone: | |
1230 | kmem_zone_destroy(xfs_qm_dqzone); | |
1231 | out: | |
1232 | return -ENOMEM; | |
1233 | } | |
1234 | ||
1c2ccc66 | 1235 | void |
a05931ce CH |
1236 | xfs_qm_exit(void) |
1237 | { | |
1238 | kmem_zone_destroy(xfs_qm_dqtrxzone); | |
1239 | kmem_zone_destroy(xfs_qm_dqzone); | |
1240 | } |