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1da177e4 | 1 | /* |
4ce3121f NS |
2 | * Copyright (c) 2000-2005 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 LT |
26 | #include "xfs_dir2.h" |
27 | #include "xfs_alloc.h" | |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_quota.h" | |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 | 34 | #include "xfs_dir2_sf.h" |
a844f451 | 35 | #include "xfs_attr_sf.h" |
1da177e4 LT |
36 | #include "xfs_dinode.h" |
37 | #include "xfs_inode.h" | |
a844f451 NS |
38 | #include "xfs_btree.h" |
39 | #include "xfs_ialloc.h" | |
40 | #include "xfs_itable.h" | |
1da177e4 LT |
41 | #include "xfs_rtalloc.h" |
42 | #include "xfs_error.h" | |
a844f451 | 43 | #include "xfs_bmap.h" |
1da177e4 | 44 | #include "xfs_rw.h" |
1da177e4 LT |
45 | #include "xfs_attr.h" |
46 | #include "xfs_buf_item.h" | |
47 | #include "xfs_trans_space.h" | |
48 | #include "xfs_utils.h" | |
1da177e4 | 49 | #include "xfs_qm.h" |
0b1b213f | 50 | #include "xfs_trace.h" |
1da177e4 LT |
51 | |
52 | /* | |
53 | * The global quota manager. There is only one of these for the entire | |
54 | * system, _not_ one per file system. XQM keeps track of the overall | |
55 | * quota functionality, including maintaining the freelist and hash | |
56 | * tables of dquots. | |
57 | */ | |
a0b0b8a5 | 58 | struct mutex xfs_Gqm_lock; |
1da177e4 | 59 | struct xfs_qm *xfs_Gqm; |
6b3f6b5b | 60 | uint ndquot; |
1da177e4 LT |
61 | |
62 | kmem_zone_t *qm_dqzone; | |
63 | kmem_zone_t *qm_dqtrxzone; | |
1da177e4 | 64 | |
7989cb8e | 65 | static cred_t xfs_zerocr; |
dae81d47 | 66 | |
1da177e4 LT |
67 | STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int); |
68 | STATIC void xfs_qm_list_destroy(xfs_dqlist_t *); | |
69 | ||
ba0f32d4 CH |
70 | STATIC void xfs_qm_freelist_init(xfs_frlist_t *); |
71 | STATIC void xfs_qm_freelist_destroy(xfs_frlist_t *); | |
ba0f32d4 | 72 | |
1da177e4 | 73 | STATIC int xfs_qm_init_quotainos(xfs_mount_t *); |
ba0f32d4 | 74 | STATIC int xfs_qm_init_quotainfo(xfs_mount_t *); |
51bfb75b | 75 | STATIC int xfs_qm_shake(int, gfp_t); |
1da177e4 | 76 | |
8e1f936b RR |
77 | static struct shrinker xfs_qm_shaker = { |
78 | .shrink = xfs_qm_shake, | |
79 | .seeks = DEFAULT_SEEKS, | |
80 | }; | |
81 | ||
1da177e4 | 82 | #ifdef DEBUG |
a0b0b8a5 | 83 | extern struct mutex qcheck_lock; |
1da177e4 LT |
84 | #endif |
85 | ||
86 | #ifdef QUOTADEBUG | |
3a25404b DC |
87 | static void |
88 | xfs_qm_dquot_list_print( | |
89 | struct xfs_mount *mp) | |
90 | { | |
91 | xfs_dquot_t *dqp; | |
92 | int i = 0; | |
93 | ||
94 | list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist_lock, qi_mplist) { | |
95 | cmn_err(CE_DEBUG, " %d. \"%d (%s)\" " | |
96 | "bcnt = %lld, icnt = %lld, refs = %d", | |
97 | i++, be32_to_cpu(dqp->q_core.d_id), | |
98 | DQFLAGTO_TYPESTR(dqp), | |
99 | (long long)be64_to_cpu(dqp->q_core.d_bcount), | |
100 | (long long)be64_to_cpu(dqp->q_core.d_icount), | |
101 | dqp->q_nrefs); | |
102 | } | |
1da177e4 LT |
103 | } |
104 | #else | |
3a25404b | 105 | static void xfs_qm_dquot_list_print(struct xfs_mount *mp) { } |
1da177e4 LT |
106 | #endif |
107 | ||
108 | /* | |
109 | * Initialize the XQM structure. | |
110 | * Note that there is not one quota manager per file system. | |
111 | */ | |
112 | STATIC struct xfs_qm * | |
113 | xfs_Gqm_init(void) | |
114 | { | |
6b3f6b5b NS |
115 | xfs_dqhash_t *udqhash, *gdqhash; |
116 | xfs_qm_t *xqm; | |
215101c3 NS |
117 | size_t hsize; |
118 | uint i; | |
1da177e4 LT |
119 | |
120 | /* | |
121 | * Initialize the dquot hash tables. | |
122 | */ | |
77e4635a | 123 | udqhash = kmem_zalloc_greedy(&hsize, |
5995cb7d | 124 | XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t), |
bdfb0430 CH |
125 | XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t)); |
126 | if (!udqhash) | |
127 | goto out; | |
128 | ||
129 | gdqhash = kmem_zalloc_large(hsize); | |
d67b1b03 | 130 | if (!gdqhash) |
bdfb0430 CH |
131 | goto out_free_udqhash; |
132 | ||
77e4635a | 133 | hsize /= sizeof(xfs_dqhash_t); |
6b3f6b5b | 134 | ndquot = hsize << 8; |
1da177e4 | 135 | |
6b3f6b5b NS |
136 | xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP); |
137 | xqm->qm_dqhashmask = hsize - 1; | |
138 | xqm->qm_usr_dqhtable = udqhash; | |
139 | xqm->qm_grp_dqhtable = gdqhash; | |
1da177e4 LT |
140 | ASSERT(xqm->qm_usr_dqhtable != NULL); |
141 | ASSERT(xqm->qm_grp_dqhtable != NULL); | |
142 | ||
143 | for (i = 0; i < hsize; i++) { | |
144 | xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i); | |
145 | xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i); | |
146 | } | |
147 | ||
148 | /* | |
149 | * Freelist of all dquots of all file systems | |
150 | */ | |
151 | xfs_qm_freelist_init(&(xqm->qm_dqfreelist)); | |
152 | ||
153 | /* | |
154 | * dquot zone. we register our own low-memory callback. | |
155 | */ | |
156 | if (!qm_dqzone) { | |
157 | xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t), | |
158 | "xfs_dquots"); | |
159 | qm_dqzone = xqm->qm_dqzone; | |
160 | } else | |
161 | xqm->qm_dqzone = qm_dqzone; | |
162 | ||
8e1f936b | 163 | register_shrinker(&xfs_qm_shaker); |
1da177e4 LT |
164 | |
165 | /* | |
166 | * The t_dqinfo portion of transactions. | |
167 | */ | |
168 | if (!qm_dqtrxzone) { | |
169 | xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t), | |
170 | "xfs_dqtrx"); | |
171 | qm_dqtrxzone = xqm->qm_dqtrxzone; | |
172 | } else | |
173 | xqm->qm_dqtrxzone = qm_dqtrxzone; | |
174 | ||
175 | atomic_set(&xqm->qm_totaldquots, 0); | |
176 | xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO; | |
177 | xqm->qm_nrefs = 0; | |
178 | #ifdef DEBUG | |
c2e81432 | 179 | mutex_init(&qcheck_lock); |
1da177e4 LT |
180 | #endif |
181 | return xqm; | |
bdfb0430 CH |
182 | |
183 | out_free_udqhash: | |
184 | kmem_free_large(udqhash); | |
185 | out: | |
186 | return NULL; | |
1da177e4 LT |
187 | } |
188 | ||
189 | /* | |
190 | * Destroy the global quota manager when its reference count goes to zero. | |
191 | */ | |
ba0f32d4 | 192 | STATIC void |
1da177e4 LT |
193 | xfs_qm_destroy( |
194 | struct xfs_qm *xqm) | |
195 | { | |
196 | int hsize, i; | |
197 | ||
198 | ASSERT(xqm != NULL); | |
199 | ASSERT(xqm->qm_nrefs == 0); | |
8e1f936b | 200 | unregister_shrinker(&xfs_qm_shaker); |
1da177e4 LT |
201 | hsize = xqm->qm_dqhashmask + 1; |
202 | for (i = 0; i < hsize; i++) { | |
203 | xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i])); | |
204 | xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i])); | |
205 | } | |
bdfb0430 CH |
206 | kmem_free_large(xqm->qm_usr_dqhtable); |
207 | kmem_free_large(xqm->qm_grp_dqhtable); | |
1da177e4 LT |
208 | xqm->qm_usr_dqhtable = NULL; |
209 | xqm->qm_grp_dqhtable = NULL; | |
210 | xqm->qm_dqhashmask = 0; | |
211 | xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist)); | |
212 | #ifdef DEBUG | |
213 | mutex_destroy(&qcheck_lock); | |
214 | #endif | |
f0e2d93c | 215 | kmem_free(xqm); |
1da177e4 LT |
216 | } |
217 | ||
218 | /* | |
219 | * Called at mount time to let XQM know that another file system is | |
220 | * starting quotas. This isn't crucial information as the individual mount | |
221 | * structures are pretty independent, but it helps the XQM keep a | |
222 | * global view of what's going on. | |
223 | */ | |
224 | /* ARGSUSED */ | |
225 | STATIC int | |
226 | xfs_qm_hold_quotafs_ref( | |
227 | struct xfs_mount *mp) | |
228 | { | |
229 | /* | |
230 | * Need to lock the xfs_Gqm structure for things like this. For example, | |
231 | * the structure could disappear between the entry to this routine and | |
232 | * a HOLD operation if not locked. | |
233 | */ | |
e2494582 | 234 | mutex_lock(&xfs_Gqm_lock); |
1da177e4 | 235 | |
bdfb0430 | 236 | if (!xfs_Gqm) { |
1da177e4 | 237 | xfs_Gqm = xfs_Gqm_init(); |
bdfb0430 CH |
238 | if (!xfs_Gqm) |
239 | return ENOMEM; | |
240 | } | |
241 | ||
1da177e4 LT |
242 | /* |
243 | * We can keep a list of all filesystems with quotas mounted for | |
244 | * debugging and statistical purposes, but ... | |
245 | * Just take a reference and get out. | |
246 | */ | |
e2494582 CH |
247 | xfs_Gqm->qm_nrefs++; |
248 | mutex_unlock(&xfs_Gqm_lock); | |
1da177e4 LT |
249 | |
250 | return 0; | |
251 | } | |
252 | ||
253 | ||
254 | /* | |
255 | * Release the reference that a filesystem took at mount time, | |
256 | * so that we know when we need to destroy the entire quota manager. | |
257 | */ | |
258 | /* ARGSUSED */ | |
259 | STATIC void | |
260 | xfs_qm_rele_quotafs_ref( | |
261 | struct xfs_mount *mp) | |
262 | { | |
263 | xfs_dquot_t *dqp, *nextdqp; | |
264 | ||
265 | ASSERT(xfs_Gqm); | |
266 | ASSERT(xfs_Gqm->qm_nrefs > 0); | |
267 | ||
268 | /* | |
269 | * Go thru the freelist and destroy all inactive dquots. | |
270 | */ | |
271 | xfs_qm_freelist_lock(xfs_Gqm); | |
272 | ||
273 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
274 | dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) { | |
275 | xfs_dqlock(dqp); | |
276 | nextdqp = dqp->dq_flnext; | |
277 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
278 | ASSERT(dqp->q_mount == NULL); | |
279 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
280 | ASSERT(dqp->HL_PREVP == NULL); | |
3a25404b | 281 | ASSERT(list_empty(&dqp->q_mplist)); |
1da177e4 LT |
282 | XQM_FREELIST_REMOVE(dqp); |
283 | xfs_dqunlock(dqp); | |
284 | xfs_qm_dqdestroy(dqp); | |
285 | } else { | |
286 | xfs_dqunlock(dqp); | |
287 | } | |
288 | dqp = nextdqp; | |
289 | } | |
290 | xfs_qm_freelist_unlock(xfs_Gqm); | |
291 | ||
292 | /* | |
293 | * Destroy the entire XQM. If somebody mounts with quotaon, this'll | |
294 | * be restarted. | |
295 | */ | |
e2494582 CH |
296 | mutex_lock(&xfs_Gqm_lock); |
297 | if (--xfs_Gqm->qm_nrefs == 0) { | |
1da177e4 LT |
298 | xfs_qm_destroy(xfs_Gqm); |
299 | xfs_Gqm = NULL; | |
300 | } | |
e2494582 | 301 | mutex_unlock(&xfs_Gqm_lock); |
1da177e4 LT |
302 | } |
303 | ||
1da177e4 LT |
304 | /* |
305 | * Just destroy the quotainfo structure. | |
306 | */ | |
307 | void | |
7d095257 CH |
308 | xfs_qm_unmount( |
309 | struct xfs_mount *mp) | |
1da177e4 | 310 | { |
7d095257 CH |
311 | if (mp->m_quotainfo) { |
312 | xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_UMOUNTING); | |
1da177e4 | 313 | xfs_qm_destroy_quotainfo(mp); |
7d095257 | 314 | } |
1da177e4 LT |
315 | } |
316 | ||
317 | ||
318 | /* | |
319 | * This is called from xfs_mountfs to start quotas and initialize all | |
320 | * necessary data structures like quotainfo. This is also responsible for | |
321 | * running a quotacheck as necessary. We are guaranteed that the superblock | |
322 | * is consistently read in at this point. | |
53aa7915 DC |
323 | * |
324 | * If we fail here, the mount will continue with quota turned off. We don't | |
325 | * need to inidicate success or failure at all. | |
1da177e4 | 326 | */ |
53aa7915 | 327 | void |
1da177e4 | 328 | xfs_qm_mount_quotas( |
4249023a | 329 | xfs_mount_t *mp) |
1da177e4 | 330 | { |
1da177e4 LT |
331 | int error = 0; |
332 | uint sbf; | |
333 | ||
1da177e4 LT |
334 | /* |
335 | * If quotas on realtime volumes is not supported, we disable | |
336 | * quotas immediately. | |
337 | */ | |
338 | if (mp->m_sb.sb_rextents) { | |
339 | cmn_err(CE_NOTE, | |
340 | "Cannot turn on quotas for realtime filesystem %s", | |
341 | mp->m_fsname); | |
342 | mp->m_qflags = 0; | |
343 | goto write_changes; | |
344 | } | |
345 | ||
1da177e4 | 346 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
155ffd07 | 347 | |
1da177e4 LT |
348 | /* |
349 | * Allocate the quotainfo structure inside the mount struct, and | |
350 | * create quotainode(s), and change/rev superblock if necessary. | |
351 | */ | |
53aa7915 DC |
352 | error = xfs_qm_init_quotainfo(mp); |
353 | if (error) { | |
1da177e4 LT |
354 | /* |
355 | * We must turn off quotas. | |
356 | */ | |
357 | ASSERT(mp->m_quotainfo == NULL); | |
358 | mp->m_qflags = 0; | |
359 | goto write_changes; | |
360 | } | |
361 | /* | |
362 | * If any of the quotas are not consistent, do a quotacheck. | |
363 | */ | |
4249023a | 364 | if (XFS_QM_NEED_QUOTACHECK(mp)) { |
53aa7915 DC |
365 | error = xfs_qm_quotacheck(mp); |
366 | if (error) { | |
367 | /* Quotacheck failed and disabled quotas. */ | |
368 | return; | |
1da177e4 | 369 | } |
1da177e4 | 370 | } |
646d5bda DD |
371 | /* |
372 | * If one type of quotas is off, then it will lose its | |
373 | * quotachecked status, since we won't be doing accounting for | |
374 | * that type anymore. | |
375 | */ | |
53aa7915 | 376 | if (!XFS_IS_UQUOTA_ON(mp)) |
646d5bda | 377 | mp->m_qflags &= ~XFS_UQUOTA_CHKD; |
53aa7915 | 378 | if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp))) |
646d5bda | 379 | mp->m_qflags &= ~XFS_OQUOTA_CHKD; |
155ffd07 | 380 | |
1da177e4 LT |
381 | write_changes: |
382 | /* | |
3685c2a1 | 383 | * We actually don't have to acquire the m_sb_lock at all. |
1da177e4 LT |
384 | * This can only be called from mount, and that's single threaded. XXX |
385 | */ | |
3685c2a1 | 386 | spin_lock(&mp->m_sb_lock); |
1da177e4 LT |
387 | sbf = mp->m_sb.sb_qflags; |
388 | mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL; | |
3685c2a1 | 389 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
390 | |
391 | if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) { | |
392 | if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) { | |
393 | /* | |
394 | * We could only have been turning quotas off. | |
395 | * We aren't in very good shape actually because | |
396 | * the incore structures are convinced that quotas are | |
397 | * off, but the on disk superblock doesn't know that ! | |
398 | */ | |
399 | ASSERT(!(XFS_IS_QUOTA_RUNNING(mp))); | |
400 | xfs_fs_cmn_err(CE_ALERT, mp, | |
401 | "XFS mount_quotas: Superblock update failed!"); | |
402 | } | |
403 | } | |
404 | ||
405 | if (error) { | |
406 | xfs_fs_cmn_err(CE_WARN, mp, | |
407 | "Failed to initialize disk quotas."); | |
7d095257 | 408 | return; |
1da177e4 | 409 | } |
7d095257 CH |
410 | |
411 | #ifdef QUOTADEBUG | |
412 | if (XFS_IS_QUOTA_ON(mp)) | |
413 | xfs_qm_internalqcheck(mp); | |
414 | #endif | |
1da177e4 LT |
415 | } |
416 | ||
417 | /* | |
418 | * Called from the vfsops layer. | |
419 | */ | |
e57481dc | 420 | void |
1da177e4 LT |
421 | xfs_qm_unmount_quotas( |
422 | xfs_mount_t *mp) | |
423 | { | |
1da177e4 LT |
424 | /* |
425 | * Release the dquots that root inode, et al might be holding, | |
426 | * before we flush quotas and blow away the quotainfo structure. | |
427 | */ | |
428 | ASSERT(mp->m_rootip); | |
429 | xfs_qm_dqdetach(mp->m_rootip); | |
430 | if (mp->m_rbmip) | |
431 | xfs_qm_dqdetach(mp->m_rbmip); | |
432 | if (mp->m_rsumip) | |
433 | xfs_qm_dqdetach(mp->m_rsumip); | |
434 | ||
435 | /* | |
e57481dc | 436 | * Release the quota inodes. |
1da177e4 | 437 | */ |
1da177e4 | 438 | if (mp->m_quotainfo) { |
e57481dc CH |
439 | if (mp->m_quotainfo->qi_uquotaip) { |
440 | IRELE(mp->m_quotainfo->qi_uquotaip); | |
441 | mp->m_quotainfo->qi_uquotaip = NULL; | |
1da177e4 | 442 | } |
e57481dc CH |
443 | if (mp->m_quotainfo->qi_gquotaip) { |
444 | IRELE(mp->m_quotainfo->qi_gquotaip); | |
445 | mp->m_quotainfo->qi_gquotaip = NULL; | |
1da177e4 LT |
446 | } |
447 | } | |
1da177e4 LT |
448 | } |
449 | ||
450 | /* | |
451 | * Flush all dquots of the given file system to disk. The dquots are | |
452 | * _not_ purged from memory here, just their data written to disk. | |
453 | */ | |
ba0f32d4 | 454 | STATIC int |
1da177e4 LT |
455 | xfs_qm_dqflush_all( |
456 | xfs_mount_t *mp, | |
20026d92 | 457 | int sync_mode) |
1da177e4 LT |
458 | { |
459 | int recl; | |
460 | xfs_dquot_t *dqp; | |
461 | int niters; | |
462 | int error; | |
463 | ||
464 | if (mp->m_quotainfo == NULL) | |
014c2544 | 465 | return 0; |
1da177e4 LT |
466 | niters = 0; |
467 | again: | |
3a25404b DC |
468 | mutex_lock(&mp->m_quotainfo->qi_dqlist_lock); |
469 | list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist, q_mplist) { | |
1da177e4 LT |
470 | xfs_dqlock(dqp); |
471 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
472 | xfs_dqunlock(dqp); | |
473 | continue; | |
474 | } | |
0b1b213f | 475 | |
1da177e4 | 476 | /* XXX a sentinel would be better */ |
3a25404b | 477 | recl = mp->m_quotainfo->qi_dqreclaims; |
e1f49cf2 | 478 | if (!xfs_dqflock_nowait(dqp)) { |
1da177e4 LT |
479 | /* |
480 | * If we can't grab the flush lock then check | |
481 | * to see if the dquot has been flushed delayed | |
482 | * write. If so, grab its buffer and send it | |
483 | * out immediately. We'll be able to acquire | |
484 | * the flush lock when the I/O completes. | |
485 | */ | |
486 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
487 | } | |
488 | /* | |
489 | * Let go of the mplist lock. We don't want to hold it | |
490 | * across a disk write. | |
491 | */ | |
3a25404b | 492 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); |
20026d92 | 493 | error = xfs_qm_dqflush(dqp, sync_mode); |
1da177e4 LT |
494 | xfs_dqunlock(dqp); |
495 | if (error) | |
014c2544 | 496 | return error; |
1da177e4 | 497 | |
3a25404b DC |
498 | mutex_lock(&mp->m_quotainfo->qi_dqlist_lock); |
499 | if (recl != mp->m_quotainfo->qi_dqreclaims) { | |
500 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); | |
1da177e4 LT |
501 | /* XXX restart limit */ |
502 | goto again; | |
503 | } | |
504 | } | |
505 | ||
3a25404b | 506 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); |
1da177e4 | 507 | /* return ! busy */ |
014c2544 | 508 | return 0; |
1da177e4 LT |
509 | } |
510 | /* | |
511 | * Release the group dquot pointers the user dquots may be | |
512 | * carrying around as a hint. mplist is locked on entry and exit. | |
513 | */ | |
514 | STATIC void | |
515 | xfs_qm_detach_gdquots( | |
516 | xfs_mount_t *mp) | |
517 | { | |
518 | xfs_dquot_t *dqp, *gdqp; | |
519 | int nrecl; | |
520 | ||
521 | again: | |
3a25404b DC |
522 | ASSERT(mutex_is_locked(&mp->m_quotainfo->qi_dqlist_lock)); |
523 | list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist, q_mplist) { | |
1da177e4 LT |
524 | xfs_dqlock(dqp); |
525 | if ((gdqp = dqp->q_gdquot)) { | |
526 | xfs_dqlock(gdqp); | |
527 | dqp->q_gdquot = NULL; | |
528 | } | |
529 | xfs_dqunlock(dqp); | |
530 | ||
531 | if (gdqp) { | |
532 | /* | |
533 | * Can't hold the mplist lock across a dqput. | |
534 | * XXXmust convert to marker based iterations here. | |
535 | */ | |
3a25404b DC |
536 | nrecl = mp->m_quotainfo->qi_dqreclaims; |
537 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); | |
1da177e4 LT |
538 | xfs_qm_dqput(gdqp); |
539 | ||
3a25404b DC |
540 | mutex_lock(&mp->m_quotainfo->qi_dqlist_lock); |
541 | if (nrecl != mp->m_quotainfo->qi_dqreclaims) | |
1da177e4 LT |
542 | goto again; |
543 | } | |
1da177e4 LT |
544 | } |
545 | } | |
546 | ||
547 | /* | |
548 | * Go through all the incore dquots of this file system and take them | |
549 | * off the mplist and hashlist, if the dquot type matches the dqtype | |
550 | * parameter. This is used when turning off quota accounting for | |
551 | * users and/or groups, as well as when the filesystem is unmounting. | |
552 | */ | |
553 | STATIC int | |
554 | xfs_qm_dqpurge_int( | |
555 | xfs_mount_t *mp, | |
c8ad20ff | 556 | uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/PQUOTA/GQUOTA */ |
1da177e4 | 557 | { |
3a25404b | 558 | xfs_dquot_t *dqp, *n; |
1da177e4 LT |
559 | uint dqtype; |
560 | int nrecl; | |
1da177e4 LT |
561 | int nmisses; |
562 | ||
563 | if (mp->m_quotainfo == NULL) | |
014c2544 | 564 | return 0; |
1da177e4 LT |
565 | |
566 | dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0; | |
c8ad20ff | 567 | dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0; |
1da177e4 LT |
568 | dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0; |
569 | ||
3a25404b | 570 | mutex_lock(&mp->m_quotainfo->qi_dqlist_lock); |
1da177e4 LT |
571 | |
572 | /* | |
573 | * In the first pass through all incore dquots of this filesystem, | |
574 | * we release the group dquot pointers the user dquots may be | |
575 | * carrying around as a hint. We need to do this irrespective of | |
576 | * what's being turned off. | |
577 | */ | |
578 | xfs_qm_detach_gdquots(mp); | |
579 | ||
580 | again: | |
581 | nmisses = 0; | |
3a25404b | 582 | ASSERT(mutex_is_locked(&mp->m_quotainfo->qi_dqlist_lock)); |
1da177e4 LT |
583 | /* |
584 | * Try to get rid of all of the unwanted dquots. The idea is to | |
585 | * get them off mplist and hashlist, but leave them on freelist. | |
586 | */ | |
3a25404b | 587 | list_for_each_entry_safe(dqp, n, &mp->m_quotainfo->qi_dqlist, q_mplist) { |
1da177e4 LT |
588 | /* |
589 | * It's OK to look at the type without taking dqlock here. | |
590 | * We're holding the mplist lock here, and that's needed for | |
591 | * a dqreclaim. | |
592 | */ | |
3a25404b | 593 | if ((dqp->dq_flags & dqtype) == 0) |
1da177e4 | 594 | continue; |
1da177e4 | 595 | |
c9a192dc | 596 | if (!mutex_trylock(&dqp->q_hash->qh_lock)) { |
3a25404b DC |
597 | nrecl = mp->m_quotainfo->qi_dqreclaims; |
598 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); | |
c9a192dc | 599 | mutex_lock(&dqp->q_hash->qh_lock); |
3a25404b | 600 | mutex_lock(&mp->m_quotainfo->qi_dqlist_lock); |
1da177e4 LT |
601 | |
602 | /* | |
603 | * XXXTheoretically, we can get into a very long | |
604 | * ping pong game here. | |
605 | * No one can be adding dquots to the mplist at | |
606 | * this point, but somebody might be taking things off. | |
607 | */ | |
3a25404b | 608 | if (nrecl != mp->m_quotainfo->qi_dqreclaims) { |
c9a192dc | 609 | mutex_unlock(&dqp->q_hash->qh_lock); |
1da177e4 LT |
610 | goto again; |
611 | } | |
612 | } | |
613 | ||
614 | /* | |
615 | * Take the dquot off the mplist and hashlist. It may remain on | |
616 | * freelist in INACTIVE state. | |
617 | */ | |
4f0e8a98 | 618 | nmisses += xfs_qm_dqpurge(dqp); |
1da177e4 | 619 | } |
3a25404b | 620 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); |
1da177e4 LT |
621 | return nmisses; |
622 | } | |
623 | ||
624 | int | |
625 | xfs_qm_dqpurge_all( | |
626 | xfs_mount_t *mp, | |
627 | uint flags) | |
628 | { | |
629 | int ndquots; | |
630 | ||
631 | /* | |
632 | * Purge the dquot cache. | |
633 | * None of the dquots should really be busy at this point. | |
634 | */ | |
635 | if (mp->m_quotainfo) { | |
636 | while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) { | |
637 | delay(ndquots * 10); | |
638 | } | |
639 | } | |
640 | return 0; | |
641 | } | |
642 | ||
643 | STATIC int | |
644 | xfs_qm_dqattach_one( | |
645 | xfs_inode_t *ip, | |
646 | xfs_dqid_t id, | |
647 | uint type, | |
648 | uint doalloc, | |
1da177e4 LT |
649 | xfs_dquot_t *udqhint, /* hint */ |
650 | xfs_dquot_t **IO_idqpp) | |
651 | { | |
652 | xfs_dquot_t *dqp; | |
653 | int error; | |
654 | ||
579aa9ca | 655 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 | 656 | error = 0; |
8e9b6e7f | 657 | |
1da177e4 LT |
658 | /* |
659 | * See if we already have it in the inode itself. IO_idqpp is | |
660 | * &i_udquot or &i_gdquot. This made the code look weird, but | |
661 | * made the logic a lot simpler. | |
662 | */ | |
8e9b6e7f CH |
663 | dqp = *IO_idqpp; |
664 | if (dqp) { | |
0b1b213f | 665 | trace_xfs_dqattach_found(dqp); |
8e9b6e7f | 666 | return 0; |
1da177e4 LT |
667 | } |
668 | ||
669 | /* | |
670 | * udqhint is the i_udquot field in inode, and is non-NULL only | |
c8ad20ff | 671 | * when the type arg is group/project. Its purpose is to save a |
1da177e4 LT |
672 | * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside |
673 | * the user dquot. | |
674 | */ | |
8e9b6e7f CH |
675 | if (udqhint) { |
676 | ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ); | |
1da177e4 LT |
677 | xfs_dqlock(udqhint); |
678 | ||
8e9b6e7f CH |
679 | /* |
680 | * No need to take dqlock to look at the id. | |
681 | * | |
682 | * The ID can't change until it gets reclaimed, and it won't | |
683 | * be reclaimed as long as we have a ref from inode and we | |
684 | * hold the ilock. | |
685 | */ | |
686 | dqp = udqhint->q_gdquot; | |
687 | if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) { | |
688 | xfs_dqlock(dqp); | |
689 | XFS_DQHOLD(dqp); | |
690 | ASSERT(*IO_idqpp == NULL); | |
691 | *IO_idqpp = dqp; | |
692 | ||
1da177e4 LT |
693 | xfs_dqunlock(dqp); |
694 | xfs_dqunlock(udqhint); | |
8e9b6e7f | 695 | return 0; |
1da177e4 | 696 | } |
8e9b6e7f CH |
697 | |
698 | /* | |
699 | * We can't hold a dquot lock when we call the dqget code. | |
700 | * We'll deadlock in no time, because of (not conforming to) | |
701 | * lock ordering - the inodelock comes before any dquot lock, | |
702 | * and we may drop and reacquire the ilock in xfs_qm_dqget(). | |
703 | */ | |
1da177e4 | 704 | xfs_dqunlock(udqhint); |
8e9b6e7f CH |
705 | } |
706 | ||
1da177e4 LT |
707 | /* |
708 | * Find the dquot from somewhere. This bumps the | |
709 | * reference count of dquot and returns it locked. | |
710 | * This can return ENOENT if dquot didn't exist on | |
711 | * disk and we didn't ask it to allocate; | |
712 | * ESRCH if quotas got turned off suddenly. | |
713 | */ | |
8e9b6e7f CH |
714 | error = xfs_qm_dqget(ip->i_mount, ip, id, type, XFS_QMOPT_DOWARN, &dqp); |
715 | if (error) | |
716 | return error; | |
1da177e4 | 717 | |
0b1b213f | 718 | trace_xfs_dqattach_get(dqp); |
8e9b6e7f | 719 | |
1da177e4 LT |
720 | /* |
721 | * dqget may have dropped and re-acquired the ilock, but it guarantees | |
722 | * that the dquot returned is the one that should go in the inode. | |
723 | */ | |
724 | *IO_idqpp = dqp; | |
8e9b6e7f CH |
725 | xfs_dqunlock(dqp); |
726 | return 0; | |
1da177e4 LT |
727 | } |
728 | ||
729 | ||
730 | /* | |
731 | * Given a udquot and gdquot, attach a ptr to the group dquot in the | |
732 | * udquot as a hint for future lookups. The idea sounds simple, but the | |
733 | * execution isn't, because the udquot might have a group dquot attached | |
c41564b5 | 734 | * already and getting rid of that gets us into lock ordering constraints. |
1da177e4 LT |
735 | * The process is complicated more by the fact that the dquots may or may not |
736 | * be locked on entry. | |
737 | */ | |
738 | STATIC void | |
739 | xfs_qm_dqattach_grouphint( | |
740 | xfs_dquot_t *udq, | |
8e9b6e7f | 741 | xfs_dquot_t *gdq) |
1da177e4 LT |
742 | { |
743 | xfs_dquot_t *tmp; | |
744 | ||
8e9b6e7f | 745 | xfs_dqlock(udq); |
1da177e4 LT |
746 | |
747 | if ((tmp = udq->q_gdquot)) { | |
748 | if (tmp == gdq) { | |
8e9b6e7f | 749 | xfs_dqunlock(udq); |
1da177e4 LT |
750 | return; |
751 | } | |
752 | ||
753 | udq->q_gdquot = NULL; | |
754 | /* | |
755 | * We can't keep any dqlocks when calling dqrele, | |
756 | * because the freelist lock comes before dqlocks. | |
757 | */ | |
758 | xfs_dqunlock(udq); | |
1da177e4 LT |
759 | /* |
760 | * we took a hard reference once upon a time in dqget, | |
761 | * so give it back when the udquot no longer points at it | |
762 | * dqput() does the unlocking of the dquot. | |
763 | */ | |
764 | xfs_qm_dqrele(tmp); | |
765 | ||
766 | xfs_dqlock(udq); | |
767 | xfs_dqlock(gdq); | |
768 | ||
769 | } else { | |
770 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
8e9b6e7f | 771 | xfs_dqlock(gdq); |
1da177e4 LT |
772 | } |
773 | ||
774 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
775 | ASSERT(XFS_DQ_IS_LOCKED(gdq)); | |
776 | /* | |
777 | * Somebody could have attached a gdquot here, | |
778 | * when we dropped the uqlock. If so, just do nothing. | |
779 | */ | |
780 | if (udq->q_gdquot == NULL) { | |
781 | XFS_DQHOLD(gdq); | |
782 | udq->q_gdquot = gdq; | |
783 | } | |
8e9b6e7f CH |
784 | |
785 | xfs_dqunlock(gdq); | |
786 | xfs_dqunlock(udq); | |
1da177e4 LT |
787 | } |
788 | ||
789 | ||
790 | /* | |
c8ad20ff NS |
791 | * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON |
792 | * into account. | |
1da177e4 | 793 | * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed. |
1da177e4 LT |
794 | * Inode may get unlocked and relocked in here, and the caller must deal with |
795 | * the consequences. | |
796 | */ | |
797 | int | |
7d095257 | 798 | xfs_qm_dqattach_locked( |
1da177e4 LT |
799 | xfs_inode_t *ip, |
800 | uint flags) | |
801 | { | |
802 | xfs_mount_t *mp = ip->i_mount; | |
803 | uint nquotas = 0; | |
804 | int error = 0; | |
805 | ||
7d095257 CH |
806 | if (!XFS_IS_QUOTA_RUNNING(mp) || |
807 | !XFS_IS_QUOTA_ON(mp) || | |
808 | !XFS_NOT_DQATTACHED(mp, ip) || | |
809 | ip->i_ino == mp->m_sb.sb_uquotino || | |
810 | ip->i_ino == mp->m_sb.sb_gquotino) | |
014c2544 | 811 | return 0; |
1da177e4 | 812 | |
7d095257 | 813 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
814 | |
815 | if (XFS_IS_UQUOTA_ON(mp)) { | |
816 | error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER, | |
817 | flags & XFS_QMOPT_DQALLOC, | |
1da177e4 LT |
818 | NULL, &ip->i_udquot); |
819 | if (error) | |
820 | goto done; | |
821 | nquotas++; | |
822 | } | |
579aa9ca CH |
823 | |
824 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
c8ad20ff NS |
825 | if (XFS_IS_OQUOTA_ON(mp)) { |
826 | error = XFS_IS_GQUOTA_ON(mp) ? | |
827 | xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP, | |
828 | flags & XFS_QMOPT_DQALLOC, | |
c8ad20ff NS |
829 | ip->i_udquot, &ip->i_gdquot) : |
830 | xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ, | |
1da177e4 | 831 | flags & XFS_QMOPT_DQALLOC, |
1da177e4 LT |
832 | ip->i_udquot, &ip->i_gdquot); |
833 | /* | |
834 | * Don't worry about the udquot that we may have | |
835 | * attached above. It'll get detached, if not already. | |
836 | */ | |
837 | if (error) | |
838 | goto done; | |
839 | nquotas++; | |
840 | } | |
841 | ||
842 | /* | |
843 | * Attach this group quota to the user quota as a hint. | |
844 | * This WON'T, in general, result in a thrash. | |
845 | */ | |
846 | if (nquotas == 2) { | |
579aa9ca | 847 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
848 | ASSERT(ip->i_udquot); |
849 | ASSERT(ip->i_gdquot); | |
850 | ||
851 | /* | |
852 | * We may or may not have the i_udquot locked at this point, | |
853 | * but this check is OK since we don't depend on the i_gdquot to | |
854 | * be accurate 100% all the time. It is just a hint, and this | |
855 | * will succeed in general. | |
856 | */ | |
857 | if (ip->i_udquot->q_gdquot == ip->i_gdquot) | |
858 | goto done; | |
859 | /* | |
860 | * Attach i_gdquot to the gdquot hint inside the i_udquot. | |
861 | */ | |
8e9b6e7f | 862 | xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot); |
1da177e4 LT |
863 | } |
864 | ||
7d095257 | 865 | done: |
1da177e4 LT |
866 | #ifdef QUOTADEBUG |
867 | if (! error) { | |
1da177e4 LT |
868 | if (XFS_IS_UQUOTA_ON(mp)) |
869 | ASSERT(ip->i_udquot); | |
c8ad20ff | 870 | if (XFS_IS_OQUOTA_ON(mp)) |
1da177e4 LT |
871 | ASSERT(ip->i_gdquot); |
872 | } | |
7d095257 | 873 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 | 874 | #endif |
7d095257 CH |
875 | return error; |
876 | } | |
1da177e4 | 877 | |
7d095257 CH |
878 | int |
879 | xfs_qm_dqattach( | |
880 | struct xfs_inode *ip, | |
881 | uint flags) | |
882 | { | |
883 | int error; | |
884 | ||
885 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
886 | error = xfs_qm_dqattach_locked(ip, flags); | |
887 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1da177e4 | 888 | |
014c2544 | 889 | return error; |
1da177e4 LT |
890 | } |
891 | ||
892 | /* | |
893 | * Release dquots (and their references) if any. | |
894 | * The inode should be locked EXCL except when this's called by | |
895 | * xfs_ireclaim. | |
896 | */ | |
897 | void | |
898 | xfs_qm_dqdetach( | |
899 | xfs_inode_t *ip) | |
900 | { | |
901 | if (!(ip->i_udquot || ip->i_gdquot)) | |
902 | return; | |
903 | ||
0b1b213f CH |
904 | trace_xfs_dquot_dqdetach(ip); |
905 | ||
1da177e4 LT |
906 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino); |
907 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino); | |
1da177e4 LT |
908 | if (ip->i_udquot) { |
909 | xfs_qm_dqrele(ip->i_udquot); | |
910 | ip->i_udquot = NULL; | |
911 | } | |
912 | if (ip->i_gdquot) { | |
913 | xfs_qm_dqrele(ip->i_gdquot); | |
914 | ip->i_gdquot = NULL; | |
915 | } | |
916 | } | |
917 | ||
1da177e4 LT |
918 | int |
919 | xfs_qm_sync( | |
920 | xfs_mount_t *mp, | |
b09cc771 | 921 | int flags) |
1da177e4 LT |
922 | { |
923 | int recl, restarts; | |
924 | xfs_dquot_t *dqp; | |
1da177e4 LT |
925 | int error; |
926 | ||
7d095257 | 927 | if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) |
d757762b DD |
928 | return 0; |
929 | ||
1da177e4 | 930 | restarts = 0; |
1da177e4 LT |
931 | |
932 | again: | |
3a25404b | 933 | mutex_lock(&mp->m_quotainfo->qi_dqlist_lock); |
1da177e4 LT |
934 | /* |
935 | * dqpurge_all() also takes the mplist lock and iterate thru all dquots | |
936 | * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared | |
937 | * when we have the mplist lock, we know that dquots will be consistent | |
938 | * as long as we have it locked. | |
939 | */ | |
3a25404b DC |
940 | if (!XFS_IS_QUOTA_ON(mp)) { |
941 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); | |
014c2544 | 942 | return 0; |
1da177e4 | 943 | } |
3a25404b DC |
944 | ASSERT(mutex_is_locked(&mp->m_quotainfo->qi_dqlist_lock)); |
945 | list_for_each_entry(dqp, &mp->m_quotainfo->qi_dqlist, q_mplist) { | |
1da177e4 LT |
946 | /* |
947 | * If this is vfs_sync calling, then skip the dquots that | |
948 | * don't 'seem' to be dirty. ie. don't acquire dqlock. | |
949 | * This is very similar to what xfs_sync does with inodes. | |
950 | */ | |
8b5403a6 CH |
951 | if (flags & SYNC_TRYLOCK) { |
952 | if (!XFS_DQ_IS_DIRTY(dqp)) | |
1da177e4 | 953 | continue; |
8b5403a6 | 954 | if (!xfs_qm_dqlock_nowait(dqp)) |
1da177e4 LT |
955 | continue; |
956 | } else { | |
957 | xfs_dqlock(dqp); | |
958 | } | |
959 | ||
960 | /* | |
961 | * Now, find out for sure if this dquot is dirty or not. | |
962 | */ | |
963 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
964 | xfs_dqunlock(dqp); | |
965 | continue; | |
966 | } | |
967 | ||
968 | /* XXX a sentinel would be better */ | |
3a25404b | 969 | recl = mp->m_quotainfo->qi_dqreclaims; |
e1f49cf2 | 970 | if (!xfs_dqflock_nowait(dqp)) { |
8b5403a6 | 971 | if (flags & SYNC_TRYLOCK) { |
1da177e4 LT |
972 | xfs_dqunlock(dqp); |
973 | continue; | |
974 | } | |
975 | /* | |
976 | * If we can't grab the flush lock then if the caller | |
c41564b5 | 977 | * really wanted us to give this our best shot, so |
1da177e4 LT |
978 | * see if we can give a push to the buffer before we wait |
979 | * on the flush lock. At this point, we know that | |
c41564b5 | 980 | * even though the dquot is being flushed, |
1da177e4 LT |
981 | * it has (new) dirty data. |
982 | */ | |
983 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
984 | } | |
985 | /* | |
986 | * Let go of the mplist lock. We don't want to hold it | |
987 | * across a disk write | |
988 | */ | |
3a25404b | 989 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); |
20026d92 | 990 | error = xfs_qm_dqflush(dqp, flags); |
1da177e4 LT |
991 | xfs_dqunlock(dqp); |
992 | if (error && XFS_FORCED_SHUTDOWN(mp)) | |
014c2544 | 993 | return 0; /* Need to prevent umount failure */ |
1da177e4 | 994 | else if (error) |
014c2544 | 995 | return error; |
1da177e4 | 996 | |
3a25404b DC |
997 | mutex_lock(&mp->m_quotainfo->qi_dqlist_lock); |
998 | if (recl != mp->m_quotainfo->qi_dqreclaims) { | |
1da177e4 LT |
999 | if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS) |
1000 | break; | |
1001 | ||
3a25404b | 1002 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); |
1da177e4 LT |
1003 | goto again; |
1004 | } | |
1005 | } | |
1006 | ||
3a25404b | 1007 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); |
014c2544 | 1008 | return 0; |
1da177e4 LT |
1009 | } |
1010 | ||
a4edd1da CH |
1011 | /* |
1012 | * The hash chains and the mplist use the same xfs_dqhash structure as | |
1013 | * their list head, but we can take the mplist qh_lock and one of the | |
1014 | * hash qh_locks at the same time without any problem as they aren't | |
1015 | * related. | |
1016 | */ | |
1017 | static struct lock_class_key xfs_quota_mplist_class; | |
1da177e4 LT |
1018 | |
1019 | /* | |
1020 | * This initializes all the quota information that's kept in the | |
1021 | * mount structure | |
1022 | */ | |
ba0f32d4 | 1023 | STATIC int |
1da177e4 LT |
1024 | xfs_qm_init_quotainfo( |
1025 | xfs_mount_t *mp) | |
1026 | { | |
1027 | xfs_quotainfo_t *qinf; | |
1028 | int error; | |
1029 | xfs_dquot_t *dqp; | |
1030 | ||
1031 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1032 | ||
1033 | /* | |
1034 | * Tell XQM that we exist as soon as possible. | |
1035 | */ | |
1036 | if ((error = xfs_qm_hold_quotafs_ref(mp))) { | |
014c2544 | 1037 | return error; |
1da177e4 LT |
1038 | } |
1039 | ||
1040 | qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP); | |
1041 | ||
1042 | /* | |
1043 | * See if quotainodes are setup, and if not, allocate them, | |
1044 | * and change the superblock accordingly. | |
1045 | */ | |
1046 | if ((error = xfs_qm_init_quotainos(mp))) { | |
f0e2d93c | 1047 | kmem_free(qinf); |
1da177e4 | 1048 | mp->m_quotainfo = NULL; |
014c2544 | 1049 | return error; |
1da177e4 LT |
1050 | } |
1051 | ||
3a25404b DC |
1052 | INIT_LIST_HEAD(&qinf->qi_dqlist); |
1053 | mutex_init(&qinf->qi_dqlist_lock); | |
1054 | lockdep_set_class(&qinf->qi_dqlist_lock, &xfs_quota_mplist_class); | |
a4edd1da | 1055 | |
1da177e4 LT |
1056 | qinf->qi_dqreclaims = 0; |
1057 | ||
1058 | /* mutex used to serialize quotaoffs */ | |
794ee1ba | 1059 | mutex_init(&qinf->qi_quotaofflock); |
1da177e4 LT |
1060 | |
1061 | /* Precalc some constants */ | |
1062 | qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1063 | ASSERT(qinf->qi_dqchunklen); | |
1064 | qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen); | |
1065 | do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t)); | |
1066 | ||
1067 | mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD); | |
1068 | ||
1069 | /* | |
1070 | * We try to get the limits from the superuser's limits fields. | |
1071 | * This is quite hacky, but it is standard quota practice. | |
1072 | * We look at the USR dquot with id == 0 first, but if user quotas | |
1073 | * are not enabled we goto the GRP dquot with id == 0. | |
1074 | * We don't really care to keep separate default limits for user | |
1075 | * and group quotas, at least not at this point. | |
1076 | */ | |
1077 | error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0, | |
c8ad20ff NS |
1078 | XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER : |
1079 | (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP : | |
1080 | XFS_DQ_PROJ), | |
1da177e4 LT |
1081 | XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN, |
1082 | &dqp); | |
1083 | if (! error) { | |
1084 | xfs_disk_dquot_t *ddqp = &dqp->q_core; | |
1085 | ||
1086 | /* | |
1087 | * The warnings and timers set the grace period given to | |
1088 | * a user or group before he or she can not perform any | |
1089 | * more writing. If it is zero, a default is used. | |
1090 | */ | |
1149d96a CH |
1091 | qinf->qi_btimelimit = ddqp->d_btimer ? |
1092 | be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT; | |
1093 | qinf->qi_itimelimit = ddqp->d_itimer ? | |
1094 | be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT; | |
1095 | qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ? | |
1096 | be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT; | |
1097 | qinf->qi_bwarnlimit = ddqp->d_bwarns ? | |
1098 | be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT; | |
1099 | qinf->qi_iwarnlimit = ddqp->d_iwarns ? | |
1100 | be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT; | |
1101 | qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ? | |
1102 | be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT; | |
1103 | qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit); | |
1104 | qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit); | |
1105 | qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit); | |
1106 | qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit); | |
1107 | qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit); | |
1108 | qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit); | |
1da177e4 LT |
1109 | |
1110 | /* | |
1111 | * We sent the XFS_QMOPT_DQSUSER flag to dqget because | |
1112 | * we don't want this dquot cached. We haven't done a | |
1113 | * quotacheck yet, and quotacheck doesn't like incore dquots. | |
1114 | */ | |
1115 | xfs_qm_dqdestroy(dqp); | |
1116 | } else { | |
1117 | qinf->qi_btimelimit = XFS_QM_BTIMELIMIT; | |
1118 | qinf->qi_itimelimit = XFS_QM_ITIMELIMIT; | |
1119 | qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT; | |
1120 | qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT; | |
1121 | qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT; | |
06d10dd9 | 1122 | qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT; |
1da177e4 LT |
1123 | } |
1124 | ||
014c2544 | 1125 | return 0; |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | ||
1129 | /* | |
1130 | * Gets called when unmounting a filesystem or when all quotas get | |
1131 | * turned off. | |
1132 | * This purges the quota inodes, destroys locks and frees itself. | |
1133 | */ | |
1134 | void | |
1135 | xfs_qm_destroy_quotainfo( | |
1136 | xfs_mount_t *mp) | |
1137 | { | |
1138 | xfs_quotainfo_t *qi; | |
1139 | ||
1140 | qi = mp->m_quotainfo; | |
1141 | ASSERT(qi != NULL); | |
1142 | ASSERT(xfs_Gqm != NULL); | |
1143 | ||
1144 | /* | |
1145 | * Release the reference that XQM kept, so that we know | |
1146 | * when the XQM structure should be freed. We cannot assume | |
1147 | * that xfs_Gqm is non-null after this point. | |
1148 | */ | |
1149 | xfs_qm_rele_quotafs_ref(mp); | |
1150 | ||
3a25404b DC |
1151 | ASSERT(list_empty(&qi->qi_dqlist)); |
1152 | mutex_destroy(&qi->qi_dqlist_lock); | |
1da177e4 LT |
1153 | |
1154 | if (qi->qi_uquotaip) { | |
26cc0021 | 1155 | IRELE(qi->qi_uquotaip); |
1da177e4 LT |
1156 | qi->qi_uquotaip = NULL; /* paranoia */ |
1157 | } | |
1158 | if (qi->qi_gquotaip) { | |
26cc0021 | 1159 | IRELE(qi->qi_gquotaip); |
1da177e4 LT |
1160 | qi->qi_gquotaip = NULL; |
1161 | } | |
1162 | mutex_destroy(&qi->qi_quotaofflock); | |
f0e2d93c | 1163 | kmem_free(qi); |
1da177e4 LT |
1164 | mp->m_quotainfo = NULL; |
1165 | } | |
1166 | ||
1167 | ||
1168 | ||
1169 | /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */ | |
1170 | ||
1171 | /* ARGSUSED */ | |
1172 | STATIC void | |
1173 | xfs_qm_list_init( | |
1174 | xfs_dqlist_t *list, | |
1175 | char *str, | |
1176 | int n) | |
1177 | { | |
794ee1ba | 1178 | mutex_init(&list->qh_lock); |
1da177e4 LT |
1179 | list->qh_next = NULL; |
1180 | list->qh_version = 0; | |
1181 | list->qh_nelems = 0; | |
1182 | } | |
1183 | ||
1184 | STATIC void | |
1185 | xfs_qm_list_destroy( | |
1186 | xfs_dqlist_t *list) | |
1187 | { | |
1188 | mutex_destroy(&(list->qh_lock)); | |
1189 | } | |
1190 | ||
1191 | ||
1192 | /* | |
1193 | * Stripped down version of dqattach. This doesn't attach, or even look at the | |
1194 | * dquots attached to the inode. The rationale is that there won't be any | |
1195 | * attached at the time this is called from quotacheck. | |
1196 | */ | |
1197 | STATIC int | |
1198 | xfs_qm_dqget_noattach( | |
1199 | xfs_inode_t *ip, | |
1200 | xfs_dquot_t **O_udqpp, | |
1201 | xfs_dquot_t **O_gdqpp) | |
1202 | { | |
1203 | int error; | |
1204 | xfs_mount_t *mp; | |
1205 | xfs_dquot_t *udqp, *gdqp; | |
1206 | ||
579aa9ca | 1207 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
1208 | mp = ip->i_mount; |
1209 | udqp = NULL; | |
1210 | gdqp = NULL; | |
1211 | ||
1212 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1213 | ASSERT(ip->i_udquot == NULL); | |
1214 | /* | |
1215 | * We want the dquot allocated if it doesn't exist. | |
1216 | */ | |
1217 | if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER, | |
1218 | XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, | |
1219 | &udqp))) { | |
1220 | /* | |
1221 | * Shouldn't be able to turn off quotas here. | |
1222 | */ | |
1223 | ASSERT(error != ESRCH); | |
1224 | ASSERT(error != ENOENT); | |
014c2544 | 1225 | return error; |
1da177e4 LT |
1226 | } |
1227 | ASSERT(udqp); | |
1228 | } | |
1229 | ||
c8ad20ff | 1230 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1231 | ASSERT(ip->i_gdquot == NULL); |
1232 | if (udqp) | |
1233 | xfs_dqunlock(udqp); | |
c8ad20ff NS |
1234 | error = XFS_IS_GQUOTA_ON(mp) ? |
1235 | xfs_qm_dqget(mp, ip, | |
1236 | ip->i_d.di_gid, XFS_DQ_GROUP, | |
1237 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1238 | &gdqp) : | |
1239 | xfs_qm_dqget(mp, ip, | |
1240 | ip->i_d.di_projid, XFS_DQ_PROJ, | |
1241 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1242 | &gdqp); | |
1243 | if (error) { | |
1da177e4 LT |
1244 | if (udqp) |
1245 | xfs_qm_dqrele(udqp); | |
1246 | ASSERT(error != ESRCH); | |
1247 | ASSERT(error != ENOENT); | |
014c2544 | 1248 | return error; |
1da177e4 LT |
1249 | } |
1250 | ASSERT(gdqp); | |
1251 | ||
1252 | /* Reacquire the locks in the right order */ | |
1253 | if (udqp) { | |
1254 | if (! xfs_qm_dqlock_nowait(udqp)) { | |
1255 | xfs_dqunlock(gdqp); | |
1256 | xfs_dqlock(udqp); | |
1257 | xfs_dqlock(gdqp); | |
1258 | } | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | *O_udqpp = udqp; | |
1263 | *O_gdqpp = gdqp; | |
1264 | ||
1265 | #ifdef QUOTADEBUG | |
1266 | if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp)); | |
1267 | if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp)); | |
1268 | #endif | |
014c2544 | 1269 | return 0; |
1da177e4 LT |
1270 | } |
1271 | ||
1272 | /* | |
1273 | * Create an inode and return with a reference already taken, but unlocked | |
1274 | * This is how we create quota inodes | |
1275 | */ | |
1276 | STATIC int | |
1277 | xfs_qm_qino_alloc( | |
1278 | xfs_mount_t *mp, | |
1279 | xfs_inode_t **ip, | |
1280 | __int64_t sbfields, | |
1281 | uint flags) | |
1282 | { | |
1283 | xfs_trans_t *tp; | |
1284 | int error; | |
1da177e4 LT |
1285 | int committed; |
1286 | ||
061f7209 | 1287 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE); |
1da177e4 LT |
1288 | if ((error = xfs_trans_reserve(tp, |
1289 | XFS_QM_QINOCREATE_SPACE_RES(mp), | |
1290 | XFS_CREATE_LOG_RES(mp), 0, | |
1291 | XFS_TRANS_PERM_LOG_RES, | |
1292 | XFS_CREATE_LOG_COUNT))) { | |
1293 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1294 | return error; |
1da177e4 | 1295 | } |
1da177e4 | 1296 | |
b11f94d5 | 1297 | if ((error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, |
dae81d47 | 1298 | &xfs_zerocr, 0, 1, ip, &committed))) { |
1da177e4 LT |
1299 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | |
1300 | XFS_TRANS_ABORT); | |
014c2544 | 1301 | return error; |
1da177e4 LT |
1302 | } |
1303 | ||
1304 | /* | |
1305 | * Keep an extra reference to this quota inode. This inode is | |
1306 | * locked exclusively and joined to the transaction already. | |
1307 | */ | |
579aa9ca | 1308 | ASSERT(xfs_isilocked(*ip, XFS_ILOCK_EXCL)); |
26cc0021 | 1309 | IHOLD(*ip); |
1da177e4 LT |
1310 | |
1311 | /* | |
1312 | * Make the changes in the superblock, and log those too. | |
1313 | * sbfields arg may contain fields other than *QUOTINO; | |
1314 | * VERSIONNUM for example. | |
1315 | */ | |
3685c2a1 | 1316 | spin_lock(&mp->m_sb_lock); |
1da177e4 LT |
1317 | if (flags & XFS_QMOPT_SBVERSION) { |
1318 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1319 | unsigned oldv = mp->m_sb.sb_versionnum; | |
1320 | #endif | |
62118709 | 1321 | ASSERT(!xfs_sb_version_hasquota(&mp->m_sb)); |
1da177e4 LT |
1322 | ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | |
1323 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) == | |
1324 | (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1325 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)); | |
1326 | ||
62118709 | 1327 | xfs_sb_version_addquota(&mp->m_sb); |
1da177e4 LT |
1328 | mp->m_sb.sb_uquotino = NULLFSINO; |
1329 | mp->m_sb.sb_gquotino = NULLFSINO; | |
1330 | ||
1331 | /* qflags will get updated _after_ quotacheck */ | |
1332 | mp->m_sb.sb_qflags = 0; | |
1333 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1334 | cmn_err(CE_NOTE, | |
1335 | "Old superblock version %x, converting to %x.", | |
1336 | oldv, mp->m_sb.sb_versionnum); | |
1337 | #endif | |
1338 | } | |
1339 | if (flags & XFS_QMOPT_UQUOTA) | |
1340 | mp->m_sb.sb_uquotino = (*ip)->i_ino; | |
1341 | else | |
1342 | mp->m_sb.sb_gquotino = (*ip)->i_ino; | |
3685c2a1 | 1343 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
1344 | xfs_mod_sb(tp, sbfields); |
1345 | ||
1c72bf90 | 1346 | if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) { |
1da177e4 | 1347 | xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!"); |
014c2544 | 1348 | return error; |
1da177e4 | 1349 | } |
014c2544 | 1350 | return 0; |
1da177e4 LT |
1351 | } |
1352 | ||
1353 | ||
5b139738 | 1354 | STATIC void |
1da177e4 LT |
1355 | xfs_qm_reset_dqcounts( |
1356 | xfs_mount_t *mp, | |
1357 | xfs_buf_t *bp, | |
1358 | xfs_dqid_t id, | |
1359 | uint type) | |
1360 | { | |
1361 | xfs_disk_dquot_t *ddq; | |
1362 | int j; | |
1363 | ||
0b1b213f CH |
1364 | trace_xfs_reset_dqcounts(bp, _RET_IP_); |
1365 | ||
1da177e4 LT |
1366 | /* |
1367 | * Reset all counters and timers. They'll be | |
1368 | * started afresh by xfs_qm_quotacheck. | |
1369 | */ | |
1370 | #ifdef DEBUG | |
1371 | j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1372 | do_div(j, sizeof(xfs_dqblk_t)); | |
1373 | ASSERT(XFS_QM_DQPERBLK(mp) == j); | |
1374 | #endif | |
1375 | ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp); | |
1376 | for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) { | |
1377 | /* | |
1378 | * Do a sanity check, and if needed, repair the dqblk. Don't | |
1379 | * output any warnings because it's perfectly possible to | |
c41564b5 | 1380 | * find uninitialised dquot blks. See comment in xfs_qm_dqcheck. |
1da177e4 LT |
1381 | */ |
1382 | (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR, | |
1383 | "xfs_quotacheck"); | |
1149d96a CH |
1384 | ddq->d_bcount = 0; |
1385 | ddq->d_icount = 0; | |
1386 | ddq->d_rtbcount = 0; | |
1387 | ddq->d_btimer = 0; | |
1388 | ddq->d_itimer = 0; | |
1389 | ddq->d_rtbtimer = 0; | |
1390 | ddq->d_bwarns = 0; | |
1391 | ddq->d_iwarns = 0; | |
1392 | ddq->d_rtbwarns = 0; | |
1da177e4 LT |
1393 | ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1); |
1394 | } | |
1da177e4 LT |
1395 | } |
1396 | ||
1397 | STATIC int | |
1398 | xfs_qm_dqiter_bufs( | |
1399 | xfs_mount_t *mp, | |
1400 | xfs_dqid_t firstid, | |
1401 | xfs_fsblock_t bno, | |
1402 | xfs_filblks_t blkcnt, | |
1403 | uint flags) | |
1404 | { | |
1405 | xfs_buf_t *bp; | |
1406 | int error; | |
1407 | int notcommitted; | |
1408 | int incr; | |
c8ad20ff | 1409 | int type; |
1da177e4 LT |
1410 | |
1411 | ASSERT(blkcnt > 0); | |
1412 | notcommitted = 0; | |
1413 | incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ? | |
1414 | XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt; | |
c8ad20ff NS |
1415 | type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER : |
1416 | (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP); | |
1da177e4 LT |
1417 | error = 0; |
1418 | ||
1419 | /* | |
1420 | * Blkcnt arg can be a very big number, and might even be | |
1421 | * larger than the log itself. So, we have to break it up into | |
1422 | * manageable-sized transactions. | |
1423 | * Note that we don't start a permanent transaction here; we might | |
1424 | * not be able to get a log reservation for the whole thing up front, | |
1425 | * and we don't really care to either, because we just discard | |
1426 | * everything if we were to crash in the middle of this loop. | |
1427 | */ | |
1428 | while (blkcnt--) { | |
1429 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, | |
1430 | XFS_FSB_TO_DADDR(mp, bno), | |
1431 | (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp); | |
1432 | if (error) | |
1433 | break; | |
1434 | ||
5b139738 | 1435 | xfs_qm_reset_dqcounts(mp, bp, firstid, type); |
1da177e4 LT |
1436 | xfs_bdwrite(mp, bp); |
1437 | /* | |
1438 | * goto the next block. | |
1439 | */ | |
1440 | bno++; | |
1441 | firstid += XFS_QM_DQPERBLK(mp); | |
1442 | } | |
014c2544 | 1443 | return error; |
1da177e4 LT |
1444 | } |
1445 | ||
1446 | /* | |
c8ad20ff | 1447 | * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a |
1da177e4 LT |
1448 | * caller supplied function for every chunk of dquots that we find. |
1449 | */ | |
1450 | STATIC int | |
1451 | xfs_qm_dqiterate( | |
1452 | xfs_mount_t *mp, | |
1453 | xfs_inode_t *qip, | |
1454 | uint flags) | |
1455 | { | |
1456 | xfs_bmbt_irec_t *map; | |
1457 | int i, nmaps; /* number of map entries */ | |
1458 | int error; /* return value */ | |
1459 | xfs_fileoff_t lblkno; | |
1460 | xfs_filblks_t maxlblkcnt; | |
1461 | xfs_dqid_t firstid; | |
1462 | xfs_fsblock_t rablkno; | |
1463 | xfs_filblks_t rablkcnt; | |
1464 | ||
1465 | error = 0; | |
1466 | /* | |
c41564b5 | 1467 | * This looks racy, but we can't keep an inode lock across a |
1da177e4 LT |
1468 | * trans_reserve. But, this gets called during quotacheck, and that |
1469 | * happens only at mount time which is single threaded. | |
1470 | */ | |
1471 | if (qip->i_d.di_nblocks == 0) | |
014c2544 | 1472 | return 0; |
1da177e4 LT |
1473 | |
1474 | map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP); | |
1475 | ||
1476 | lblkno = 0; | |
1477 | maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); | |
1478 | do { | |
1479 | nmaps = XFS_DQITER_MAP_SIZE; | |
1480 | /* | |
1481 | * We aren't changing the inode itself. Just changing | |
1482 | * some of its data. No new blocks are added here, and | |
1483 | * the inode is never added to the transaction. | |
1484 | */ | |
1485 | xfs_ilock(qip, XFS_ILOCK_SHARED); | |
1486 | error = xfs_bmapi(NULL, qip, lblkno, | |
1487 | maxlblkcnt - lblkno, | |
1488 | XFS_BMAPI_METADATA, | |
1489 | NULL, | |
3e57ecf6 | 1490 | 0, map, &nmaps, NULL, NULL); |
1da177e4 LT |
1491 | xfs_iunlock(qip, XFS_ILOCK_SHARED); |
1492 | if (error) | |
1493 | break; | |
1494 | ||
1495 | ASSERT(nmaps <= XFS_DQITER_MAP_SIZE); | |
1496 | for (i = 0; i < nmaps; i++) { | |
1497 | ASSERT(map[i].br_startblock != DELAYSTARTBLOCK); | |
1498 | ASSERT(map[i].br_blockcount); | |
1499 | ||
1500 | ||
1501 | lblkno += map[i].br_blockcount; | |
1502 | ||
1503 | if (map[i].br_startblock == HOLESTARTBLOCK) | |
1504 | continue; | |
1505 | ||
1506 | firstid = (xfs_dqid_t) map[i].br_startoff * | |
1507 | XFS_QM_DQPERBLK(mp); | |
1508 | /* | |
1509 | * Do a read-ahead on the next extent. | |
1510 | */ | |
1511 | if ((i+1 < nmaps) && | |
1512 | (map[i+1].br_startblock != HOLESTARTBLOCK)) { | |
1513 | rablkcnt = map[i+1].br_blockcount; | |
1514 | rablkno = map[i+1].br_startblock; | |
1515 | while (rablkcnt--) { | |
1516 | xfs_baread(mp->m_ddev_targp, | |
1517 | XFS_FSB_TO_DADDR(mp, rablkno), | |
1518 | (int)XFS_QI_DQCHUNKLEN(mp)); | |
1519 | rablkno++; | |
1520 | } | |
1521 | } | |
1522 | /* | |
1523 | * Iterate thru all the blks in the extent and | |
1524 | * reset the counters of all the dquots inside them. | |
1525 | */ | |
1526 | if ((error = xfs_qm_dqiter_bufs(mp, | |
1527 | firstid, | |
1528 | map[i].br_startblock, | |
1529 | map[i].br_blockcount, | |
1530 | flags))) { | |
1531 | break; | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | if (error) | |
1536 | break; | |
1537 | } while (nmaps > 0); | |
1538 | ||
f0e2d93c | 1539 | kmem_free(map); |
1da177e4 | 1540 | |
014c2544 | 1541 | return error; |
1da177e4 LT |
1542 | } |
1543 | ||
1544 | /* | |
1545 | * Called by dqusage_adjust in doing a quotacheck. | |
1546 | * Given the inode, and a dquot (either USR or GRP, doesn't matter), | |
1547 | * this updates its incore copy as well as the buffer copy. This is | |
1548 | * so that once the quotacheck is done, we can just log all the buffers, | |
1549 | * as opposed to logging numerous updates to individual dquots. | |
1550 | */ | |
1551 | STATIC void | |
1552 | xfs_qm_quotacheck_dqadjust( | |
1553 | xfs_dquot_t *dqp, | |
1554 | xfs_qcnt_t nblks, | |
1555 | xfs_qcnt_t rtblks) | |
1556 | { | |
1557 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
0b1b213f CH |
1558 | |
1559 | trace_xfs_dqadjust(dqp); | |
1560 | ||
1da177e4 LT |
1561 | /* |
1562 | * Adjust the inode count and the block count to reflect this inode's | |
1563 | * resource usage. | |
1564 | */ | |
413d57c9 | 1565 | be64_add_cpu(&dqp->q_core.d_icount, 1); |
1da177e4 LT |
1566 | dqp->q_res_icount++; |
1567 | if (nblks) { | |
413d57c9 | 1568 | be64_add_cpu(&dqp->q_core.d_bcount, nblks); |
1da177e4 LT |
1569 | dqp->q_res_bcount += nblks; |
1570 | } | |
1571 | if (rtblks) { | |
413d57c9 | 1572 | be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks); |
1da177e4 LT |
1573 | dqp->q_res_rtbcount += rtblks; |
1574 | } | |
1575 | ||
1576 | /* | |
1577 | * Set default limits, adjust timers (since we changed usages) | |
1578 | */ | |
1579 | if (! XFS_IS_SUSER_DQUOT(dqp)) { | |
1580 | xfs_qm_adjust_dqlimits(dqp->q_mount, &dqp->q_core); | |
1581 | xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core); | |
1582 | } | |
1583 | ||
1584 | dqp->dq_flags |= XFS_DQ_DIRTY; | |
1585 | } | |
1586 | ||
1587 | STATIC int | |
1588 | xfs_qm_get_rtblks( | |
1589 | xfs_inode_t *ip, | |
1590 | xfs_qcnt_t *O_rtblks) | |
1591 | { | |
1592 | xfs_filblks_t rtblks; /* total rt blks */ | |
4eea22f0 | 1593 | xfs_extnum_t idx; /* extent record index */ |
1da177e4 LT |
1594 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1595 | xfs_extnum_t nextents; /* number of extent entries */ | |
1da177e4 LT |
1596 | int error; |
1597 | ||
1598 | ASSERT(XFS_IS_REALTIME_INODE(ip)); | |
1599 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
1600 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1601 | if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK))) | |
014c2544 | 1602 | return error; |
1da177e4 LT |
1603 | } |
1604 | rtblks = 0; | |
4eea22f0 | 1605 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
a6f64d4a CH |
1606 | for (idx = 0; idx < nextents; idx++) |
1607 | rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx)); | |
1da177e4 | 1608 | *O_rtblks = (xfs_qcnt_t)rtblks; |
014c2544 | 1609 | return 0; |
1da177e4 LT |
1610 | } |
1611 | ||
1612 | /* | |
1613 | * callback routine supplied to bulkstat(). Given an inumber, find its | |
1614 | * dquots and update them to account for resources taken by that inode. | |
1615 | */ | |
1616 | /* ARGSUSED */ | |
1617 | STATIC int | |
1618 | xfs_qm_dqusage_adjust( | |
1619 | xfs_mount_t *mp, /* mount point for filesystem */ | |
1620 | xfs_ino_t ino, /* inode number to get data for */ | |
1621 | void __user *buffer, /* not used */ | |
1622 | int ubsize, /* not used */ | |
1623 | void *private_data, /* not used */ | |
1624 | xfs_daddr_t bno, /* starting block of inode cluster */ | |
1625 | int *ubused, /* not used */ | |
1626 | void *dip, /* on-disk inode pointer (not used) */ | |
1627 | int *res) /* result code value */ | |
1628 | { | |
1629 | xfs_inode_t *ip; | |
1630 | xfs_dquot_t *udqp, *gdqp; | |
1631 | xfs_qcnt_t nblks, rtblks; | |
1632 | int error; | |
1633 | ||
1634 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1635 | ||
1636 | /* | |
1637 | * rootino must have its resources accounted for, not so with the quota | |
1638 | * inodes. | |
1639 | */ | |
1640 | if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) { | |
1641 | *res = BULKSTAT_RV_NOTHING; | |
1642 | return XFS_ERROR(EINVAL); | |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget | |
1647 | * interface expects the inode to be exclusively locked because that's | |
1648 | * the case in all other instances. It's OK that we do this because | |
1649 | * quotacheck is done only at mount time. | |
1650 | */ | |
1651 | if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) { | |
1652 | *res = BULKSTAT_RV_NOTHING; | |
014c2544 | 1653 | return error; |
1da177e4 LT |
1654 | } |
1655 | ||
1da177e4 LT |
1656 | /* |
1657 | * Obtain the locked dquots. In case of an error (eg. allocation | |
1658 | * fails for ENOSPC), we return the negative of the error number | |
1659 | * to bulkstat, so that it can get propagated to quotacheck() and | |
1660 | * making us disable quotas for the file system. | |
1661 | */ | |
1662 | if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) { | |
1663 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1664 | *res = BULKSTAT_RV_GIVEUP; | |
014c2544 | 1665 | return error; |
1da177e4 LT |
1666 | } |
1667 | ||
1668 | rtblks = 0; | |
1669 | if (! XFS_IS_REALTIME_INODE(ip)) { | |
1670 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks; | |
1671 | } else { | |
1672 | /* | |
1673 | * Walk thru the extent list and count the realtime blocks. | |
1674 | */ | |
1675 | if ((error = xfs_qm_get_rtblks(ip, &rtblks))) { | |
1676 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1677 | if (udqp) | |
1678 | xfs_qm_dqput(udqp); | |
1679 | if (gdqp) | |
1680 | xfs_qm_dqput(gdqp); | |
1681 | *res = BULKSTAT_RV_GIVEUP; | |
014c2544 | 1682 | return error; |
1da177e4 LT |
1683 | } |
1684 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks; | |
1685 | } | |
1686 | ASSERT(ip->i_delayed_blks == 0); | |
1687 | ||
1688 | /* | |
1689 | * We can't release the inode while holding its dquot locks. | |
1690 | * The inode can go into inactive and might try to acquire the dquotlocks. | |
1691 | * So, just unlock here and do a vn_rele at the end. | |
1692 | */ | |
1693 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1694 | ||
1695 | /* | |
1696 | * Add the (disk blocks and inode) resources occupied by this | |
1697 | * inode to its dquots. We do this adjustment in the incore dquot, | |
1698 | * and also copy the changes to its buffer. | |
1699 | * We don't care about putting these changes in a transaction | |
1700 | * envelope because if we crash in the middle of a 'quotacheck' | |
1701 | * we have to start from the beginning anyway. | |
1702 | * Once we're done, we'll log all the dquot bufs. | |
1703 | * | |
c41564b5 | 1704 | * The *QUOTA_ON checks below may look pretty racy, but quotachecks |
1da177e4 LT |
1705 | * and quotaoffs don't race. (Quotachecks happen at mount time only). |
1706 | */ | |
1707 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1708 | ASSERT(udqp); | |
1709 | xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks); | |
1710 | xfs_qm_dqput(udqp); | |
1711 | } | |
c8ad20ff | 1712 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1713 | ASSERT(gdqp); |
1714 | xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks); | |
1715 | xfs_qm_dqput(gdqp); | |
1716 | } | |
1717 | /* | |
1718 | * Now release the inode. This will send it to 'inactive', and | |
1719 | * possibly even free blocks. | |
1720 | */ | |
43355099 | 1721 | IRELE(ip); |
1da177e4 LT |
1722 | |
1723 | /* | |
1724 | * Goto next inode. | |
1725 | */ | |
1726 | *res = BULKSTAT_RV_DIDONE; | |
014c2544 | 1727 | return 0; |
1da177e4 LT |
1728 | } |
1729 | ||
1730 | /* | |
1731 | * Walk thru all the filesystem inodes and construct a consistent view | |
1732 | * of the disk quota world. If the quotacheck fails, disable quotas. | |
1733 | */ | |
1734 | int | |
1735 | xfs_qm_quotacheck( | |
1736 | xfs_mount_t *mp) | |
1737 | { | |
1738 | int done, count, error; | |
1739 | xfs_ino_t lastino; | |
1740 | size_t structsz; | |
1741 | xfs_inode_t *uip, *gip; | |
1742 | uint flags; | |
1743 | ||
1744 | count = INT_MAX; | |
1745 | structsz = 1; | |
1746 | lastino = 0; | |
1747 | flags = 0; | |
1748 | ||
1749 | ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp)); | |
1750 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1751 | ||
1752 | /* | |
1753 | * There should be no cached dquots. The (simplistic) quotacheck | |
1754 | * algorithm doesn't like that. | |
1755 | */ | |
3a25404b | 1756 | ASSERT(list_empty(&mp->m_quotainfo->qi_dqlist)); |
1da177e4 LT |
1757 | |
1758 | cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname); | |
1759 | ||
1760 | /* | |
c8ad20ff | 1761 | * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset |
1da177e4 LT |
1762 | * their counters to zero. We need a clean slate. |
1763 | * We don't log our changes till later. | |
1764 | */ | |
1765 | if ((uip = XFS_QI_UQIP(mp))) { | |
1766 | if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA))) | |
1767 | goto error_return; | |
1768 | flags |= XFS_UQUOTA_CHKD; | |
1769 | } | |
1770 | ||
1771 | if ((gip = XFS_QI_GQIP(mp))) { | |
c8ad20ff NS |
1772 | if ((error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ? |
1773 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA))) | |
1da177e4 | 1774 | goto error_return; |
c8ad20ff | 1775 | flags |= XFS_OQUOTA_CHKD; |
1da177e4 LT |
1776 | } |
1777 | ||
1778 | do { | |
1779 | /* | |
1780 | * Iterate thru all the inodes in the file system, | |
1781 | * adjusting the corresponding dquot counters in core. | |
1782 | */ | |
1783 | if ((error = xfs_bulkstat(mp, &lastino, &count, | |
1784 | xfs_qm_dqusage_adjust, NULL, | |
9c48876a | 1785 | structsz, NULL, BULKSTAT_FG_IGET, &done))) |
1da177e4 LT |
1786 | break; |
1787 | ||
1788 | } while (! done); | |
1789 | ||
4b8879df DC |
1790 | /* |
1791 | * We've made all the changes that we need to make incore. | |
1792 | * Flush them down to disk buffers if everything was updated | |
1793 | * successfully. | |
1794 | */ | |
1795 | if (!error) | |
20026d92 | 1796 | error = xfs_qm_dqflush_all(mp, 0); |
4b8879df | 1797 | |
1da177e4 LT |
1798 | /* |
1799 | * We can get this error if we couldn't do a dquot allocation inside | |
1800 | * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the | |
1801 | * dirty dquots that might be cached, we just want to get rid of them | |
1802 | * and turn quotaoff. The dquots won't be attached to any of the inodes | |
1803 | * at this point (because we intentionally didn't in dqget_noattach). | |
1804 | */ | |
1805 | if (error) { | |
ee2a4f7c | 1806 | xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_QUOTAOFF); |
1da177e4 LT |
1807 | goto error_return; |
1808 | } | |
1da177e4 LT |
1809 | |
1810 | /* | |
1811 | * We didn't log anything, because if we crashed, we'll have to | |
1812 | * start the quotacheck from scratch anyway. However, we must make | |
1813 | * sure that our dquot changes are secure before we put the | |
1814 | * quotacheck'd stamp on the superblock. So, here we do a synchronous | |
1815 | * flush. | |
1816 | */ | |
1817 | XFS_bflush(mp->m_ddev_targp); | |
1818 | ||
1819 | /* | |
1820 | * If one type of quotas is off, then it will lose its | |
1821 | * quotachecked status, since we won't be doing accounting for | |
1822 | * that type anymore. | |
1823 | */ | |
c8ad20ff | 1824 | mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD); |
1da177e4 LT |
1825 | mp->m_qflags |= flags; |
1826 | ||
3a25404b | 1827 | xfs_qm_dquot_list_print(mp); |
1da177e4 LT |
1828 | |
1829 | error_return: | |
1830 | if (error) { | |
1831 | cmn_err(CE_WARN, "XFS quotacheck %s: Unsuccessful (Error %d): " | |
1832 | "Disabling quotas.", | |
1833 | mp->m_fsname, error); | |
1834 | /* | |
1835 | * We must turn off quotas. | |
1836 | */ | |
1837 | ASSERT(mp->m_quotainfo != NULL); | |
1838 | ASSERT(xfs_Gqm != NULL); | |
1839 | xfs_qm_destroy_quotainfo(mp); | |
31d5577b DC |
1840 | if (xfs_mount_reset_sbqflags(mp)) { |
1841 | cmn_err(CE_WARN, "XFS quotacheck %s: " | |
1842 | "Failed to reset quota flags.", mp->m_fsname); | |
1843 | } | |
1da177e4 LT |
1844 | } else { |
1845 | cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname); | |
1846 | } | |
1847 | return (error); | |
1848 | } | |
1849 | ||
1850 | /* | |
1851 | * This is called after the superblock has been read in and we're ready to | |
1852 | * iget the quota inodes. | |
1853 | */ | |
1854 | STATIC int | |
1855 | xfs_qm_init_quotainos( | |
1856 | xfs_mount_t *mp) | |
1857 | { | |
1858 | xfs_inode_t *uip, *gip; | |
1859 | int error; | |
1860 | __int64_t sbflags; | |
1861 | uint flags; | |
1862 | ||
1863 | ASSERT(mp->m_quotainfo); | |
1864 | uip = gip = NULL; | |
1865 | sbflags = 0; | |
1866 | flags = 0; | |
1867 | ||
1868 | /* | |
1869 | * Get the uquota and gquota inodes | |
1870 | */ | |
62118709 | 1871 | if (xfs_sb_version_hasquota(&mp->m_sb)) { |
1da177e4 LT |
1872 | if (XFS_IS_UQUOTA_ON(mp) && |
1873 | mp->m_sb.sb_uquotino != NULLFSINO) { | |
1874 | ASSERT(mp->m_sb.sb_uquotino > 0); | |
1875 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, | |
1876 | 0, 0, &uip, 0))) | |
1877 | return XFS_ERROR(error); | |
1878 | } | |
c8ad20ff | 1879 | if (XFS_IS_OQUOTA_ON(mp) && |
1da177e4 LT |
1880 | mp->m_sb.sb_gquotino != NULLFSINO) { |
1881 | ASSERT(mp->m_sb.sb_gquotino > 0); | |
1882 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, | |
1883 | 0, 0, &gip, 0))) { | |
1884 | if (uip) | |
43355099 | 1885 | IRELE(uip); |
1da177e4 LT |
1886 | return XFS_ERROR(error); |
1887 | } | |
1888 | } | |
1889 | } else { | |
1890 | flags |= XFS_QMOPT_SBVERSION; | |
1891 | sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1892 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS); | |
1893 | } | |
1894 | ||
1895 | /* | |
1896 | * Create the two inodes, if they don't exist already. The changes | |
1897 | * made above will get added to a transaction and logged in one of | |
1898 | * the qino_alloc calls below. If the device is readonly, | |
1899 | * temporarily switch to read-write to do this. | |
1900 | */ | |
1901 | if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) { | |
1902 | if ((error = xfs_qm_qino_alloc(mp, &uip, | |
1903 | sbflags | XFS_SB_UQUOTINO, | |
1904 | flags | XFS_QMOPT_UQUOTA))) | |
1905 | return XFS_ERROR(error); | |
1906 | ||
1907 | flags &= ~XFS_QMOPT_SBVERSION; | |
1908 | } | |
c8ad20ff NS |
1909 | if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) { |
1910 | flags |= (XFS_IS_GQUOTA_ON(mp) ? | |
1911 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA); | |
1912 | error = xfs_qm_qino_alloc(mp, &gip, | |
1913 | sbflags | XFS_SB_GQUOTINO, flags); | |
1914 | if (error) { | |
1da177e4 | 1915 | if (uip) |
43355099 | 1916 | IRELE(uip); |
1da177e4 LT |
1917 | |
1918 | return XFS_ERROR(error); | |
1919 | } | |
1920 | } | |
1921 | ||
1922 | XFS_QI_UQIP(mp) = uip; | |
1923 | XFS_QI_GQIP(mp) = gip; | |
1924 | ||
014c2544 | 1925 | return 0; |
1da177e4 LT |
1926 | } |
1927 | ||
1928 | ||
368e1361 | 1929 | |
1da177e4 | 1930 | /* |
368e1361 DC |
1931 | * Just pop the least recently used dquot off the freelist and |
1932 | * recycle it. The returned dquot is locked. | |
1da177e4 | 1933 | */ |
368e1361 DC |
1934 | STATIC xfs_dquot_t * |
1935 | xfs_qm_dqreclaim_one(void) | |
1da177e4 | 1936 | { |
368e1361 DC |
1937 | xfs_dquot_t *dqpout; |
1938 | xfs_dquot_t *dqp; | |
1da177e4 | 1939 | int restarts; |
1da177e4 | 1940 | |
1da177e4 | 1941 | restarts = 0; |
368e1361 | 1942 | dqpout = NULL; |
1da177e4 | 1943 | |
368e1361 DC |
1944 | /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */ |
1945 | startagain: | |
1da177e4 LT |
1946 | xfs_qm_freelist_lock(xfs_Gqm); |
1947 | ||
368e1361 | 1948 | FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) { |
3a25404b | 1949 | struct xfs_mount *mp = dqp->q_mount; |
1da177e4 LT |
1950 | xfs_dqlock(dqp); |
1951 | ||
1952 | /* | |
1953 | * We are racing with dqlookup here. Naturally we don't | |
368e1361 DC |
1954 | * want to reclaim a dquot that lookup wants. We release the |
1955 | * freelist lock and start over, so that lookup will grab | |
1956 | * both the dquot and the freelistlock. | |
1da177e4 LT |
1957 | */ |
1958 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
368e1361 DC |
1959 | ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE)); |
1960 | ||
1961 | trace_xfs_dqreclaim_want(dqp); | |
1962 | ||
1da177e4 LT |
1963 | xfs_dqunlock(dqp); |
1964 | xfs_qm_freelist_unlock(xfs_Gqm); | |
1965 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
368e1361 | 1966 | return NULL; |
1da177e4 | 1967 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); |
368e1361 | 1968 | goto startagain; |
1da177e4 LT |
1969 | } |
1970 | ||
1971 | /* | |
1972 | * If the dquot is inactive, we are assured that it is | |
1973 | * not on the mplist or the hashlist, and that makes our | |
1974 | * life easier. | |
1975 | */ | |
1976 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
3a25404b | 1977 | ASSERT(mp == NULL); |
1da177e4 LT |
1978 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); |
1979 | ASSERT(dqp->HL_PREVP == NULL); | |
3a25404b | 1980 | ASSERT(list_empty(&dqp->q_mplist)); |
368e1361 DC |
1981 | XQM_FREELIST_REMOVE(dqp); |
1982 | xfs_dqunlock(dqp); | |
1983 | dqpout = dqp; | |
1da177e4 | 1984 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); |
368e1361 | 1985 | break; |
1da177e4 LT |
1986 | } |
1987 | ||
368e1361 | 1988 | ASSERT(dqp->q_hash); |
3a25404b | 1989 | ASSERT(!list_empty(&dqp->q_mplist)); |
368e1361 | 1990 | |
1da177e4 LT |
1991 | /* |
1992 | * Try to grab the flush lock. If this dquot is in the process of | |
1993 | * getting flushed to disk, we don't want to reclaim it. | |
1994 | */ | |
e1f49cf2 | 1995 | if (!xfs_dqflock_nowait(dqp)) { |
1da177e4 | 1996 | xfs_dqunlock(dqp); |
1da177e4 LT |
1997 | continue; |
1998 | } | |
1999 | ||
2000 | /* | |
2001 | * We have the flush lock so we know that this is not in the | |
2002 | * process of being flushed. So, if this is dirty, flush it | |
2003 | * DELWRI so that we don't get a freelist infested with | |
2004 | * dirty dquots. | |
2005 | */ | |
2006 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
3c56836f | 2007 | int error; |
0b1b213f | 2008 | |
368e1361 | 2009 | trace_xfs_dqreclaim_dirty(dqp); |
0b1b213f | 2010 | |
1da177e4 LT |
2011 | /* |
2012 | * We flush it delayed write, so don't bother | |
368e1361 | 2013 | * releasing the freelist lock. |
1da177e4 | 2014 | */ |
20026d92 | 2015 | error = xfs_qm_dqflush(dqp, 0); |
3c56836f | 2016 | if (error) { |
3a25404b | 2017 | xfs_fs_cmn_err(CE_WARN, mp, |
368e1361 | 2018 | "xfs_qm_dqreclaim: dquot %p flush failed", dqp); |
3c56836f | 2019 | } |
1da177e4 | 2020 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ |
1da177e4 LT |
2021 | continue; |
2022 | } | |
368e1361 | 2023 | |
1da177e4 LT |
2024 | /* |
2025 | * We're trying to get the hashlock out of order. This races | |
2026 | * with dqlookup; so, we giveup and goto the next dquot if | |
2027 | * we couldn't get the hashlock. This way, we won't starve | |
2028 | * a dqlookup process that holds the hashlock that is | |
2029 | * waiting for the freelist lock. | |
2030 | */ | |
c9a192dc | 2031 | if (!mutex_trylock(&dqp->q_hash->qh_lock)) { |
368e1361 DC |
2032 | restarts++; |
2033 | goto dqfunlock; | |
1da177e4 | 2034 | } |
368e1361 | 2035 | |
1da177e4 LT |
2036 | /* |
2037 | * This races with dquot allocation code as well as dqflush_all | |
2038 | * and reclaim code. So, if we failed to grab the mplist lock, | |
2039 | * giveup everything and start over. | |
2040 | */ | |
3a25404b | 2041 | if (!mutex_trylock(&mp->m_quotainfo->qi_dqlist_lock)) { |
368e1361 DC |
2042 | restarts++; |
2043 | mutex_unlock(&dqp->q_hash->qh_lock); | |
1da177e4 LT |
2044 | xfs_dqfunlock(dqp); |
2045 | xfs_dqunlock(dqp); | |
1da177e4 | 2046 | xfs_qm_freelist_unlock(xfs_Gqm); |
368e1361 DC |
2047 | if (restarts++ >= XFS_QM_RECLAIM_MAX_RESTARTS) |
2048 | return NULL; | |
2049 | goto startagain; | |
1da177e4 | 2050 | } |
0b1b213f | 2051 | |
1da177e4 | 2052 | ASSERT(dqp->q_nrefs == 0); |
3a25404b DC |
2053 | list_del_init(&dqp->q_mplist); |
2054 | mp->m_quotainfo->qi_dquots--; | |
2055 | mp->m_quotainfo->qi_dqreclaims++; | |
368e1361 | 2056 | XQM_HASHLIST_REMOVE(dqp->q_hash, dqp); |
1da177e4 | 2057 | XQM_FREELIST_REMOVE(dqp); |
368e1361 DC |
2058 | dqpout = dqp; |
2059 | mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock); | |
2060 | mutex_unlock(&dqp->q_hash->qh_lock); | |
2061 | dqfunlock: | |
2062 | xfs_dqfunlock(dqp); | |
1da177e4 | 2063 | xfs_dqunlock(dqp); |
368e1361 DC |
2064 | if (dqpout) |
2065 | break; | |
2066 | if (restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
2067 | return NULL; | |
1da177e4 LT |
2068 | } |
2069 | xfs_qm_freelist_unlock(xfs_Gqm); | |
368e1361 | 2070 | return dqpout; |
1da177e4 LT |
2071 | } |
2072 | ||
368e1361 DC |
2073 | /* |
2074 | * Traverse the freelist of dquots and attempt to reclaim a maximum of | |
2075 | * 'howmany' dquots. This operation races with dqlookup(), and attempts to | |
2076 | * favor the lookup function ... | |
2077 | */ | |
2078 | STATIC int | |
2079 | xfs_qm_shake_freelist( | |
2080 | int howmany) | |
2081 | { | |
2082 | int nreclaimed = 0; | |
2083 | xfs_dquot_t *dqp; | |
2084 | ||
2085 | if (howmany <= 0) | |
2086 | return 0; | |
2087 | ||
2088 | while (nreclaimed < howmany) { | |
2089 | dqp = xfs_qm_dqreclaim_one(); | |
2090 | if (!dqp) | |
2091 | return nreclaimed; | |
2092 | xfs_qm_dqdestroy(dqp); | |
2093 | nreclaimed++; | |
2094 | } | |
2095 | return nreclaimed; | |
2096 | } | |
1da177e4 LT |
2097 | |
2098 | /* | |
2099 | * The kmem_shake interface is invoked when memory is running low. | |
2100 | */ | |
2101 | /* ARGSUSED */ | |
2102 | STATIC int | |
51bfb75b | 2103 | xfs_qm_shake(int nr_to_scan, gfp_t gfp_mask) |
1da177e4 LT |
2104 | { |
2105 | int ndqused, nfree, n; | |
2106 | ||
2107 | if (!kmem_shake_allow(gfp_mask)) | |
014c2544 | 2108 | return 0; |
1da177e4 | 2109 | if (!xfs_Gqm) |
014c2544 | 2110 | return 0; |
1da177e4 LT |
2111 | |
2112 | nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */ | |
2113 | /* incore dquots in all f/s's */ | |
2114 | ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree; | |
2115 | ||
2116 | ASSERT(ndqused >= 0); | |
2117 | ||
2118 | if (nfree <= ndqused && nfree < ndquot) | |
014c2544 | 2119 | return 0; |
1da177e4 LT |
2120 | |
2121 | ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */ | |
2122 | n = nfree - ndqused - ndquot; /* # over target */ | |
2123 | ||
2124 | return xfs_qm_shake_freelist(MAX(nfree, n)); | |
2125 | } | |
2126 | ||
2127 | ||
1da177e4 LT |
2128 | /*------------------------------------------------------------------*/ |
2129 | ||
2130 | /* | |
2131 | * Return a new incore dquot. Depending on the number of | |
2132 | * dquots in the system, we either allocate a new one on the kernel heap, | |
2133 | * or reclaim a free one. | |
2134 | * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed | |
2135 | * to reclaim an existing one from the freelist. | |
2136 | */ | |
2137 | boolean_t | |
2138 | xfs_qm_dqalloc_incore( | |
2139 | xfs_dquot_t **O_dqpp) | |
2140 | { | |
2141 | xfs_dquot_t *dqp; | |
2142 | ||
2143 | /* | |
2144 | * Check against high water mark to see if we want to pop | |
2145 | * a nincompoop dquot off the freelist. | |
2146 | */ | |
2147 | if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) { | |
2148 | /* | |
2149 | * Try to recycle a dquot from the freelist. | |
2150 | */ | |
2151 | if ((dqp = xfs_qm_dqreclaim_one())) { | |
2152 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaims); | |
2153 | /* | |
2154 | * Just zero the core here. The rest will get | |
2155 | * reinitialized by caller. XXX we shouldn't even | |
2156 | * do this zero ... | |
2157 | */ | |
2158 | memset(&dqp->q_core, 0, sizeof(dqp->q_core)); | |
2159 | *O_dqpp = dqp; | |
014c2544 | 2160 | return B_FALSE; |
1da177e4 LT |
2161 | } |
2162 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses); | |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | * Allocate a brand new dquot on the kernel heap and return it | |
2167 | * to the caller to initialize. | |
2168 | */ | |
2169 | ASSERT(xfs_Gqm->qm_dqzone != NULL); | |
2170 | *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP); | |
2171 | atomic_inc(&xfs_Gqm->qm_totaldquots); | |
2172 | ||
014c2544 | 2173 | return B_TRUE; |
1da177e4 LT |
2174 | } |
2175 | ||
2176 | ||
2177 | /* | |
2178 | * Start a transaction and write the incore superblock changes to | |
2179 | * disk. flags parameter indicates which fields have changed. | |
2180 | */ | |
2181 | int | |
2182 | xfs_qm_write_sb_changes( | |
2183 | xfs_mount_t *mp, | |
2184 | __int64_t flags) | |
2185 | { | |
2186 | xfs_trans_t *tp; | |
2187 | int error; | |
2188 | ||
2189 | #ifdef QUOTADEBUG | |
2190 | cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname); | |
2191 | #endif | |
2192 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE); | |
2193 | if ((error = xfs_trans_reserve(tp, 0, | |
2194 | mp->m_sb.sb_sectsize + 128, 0, | |
2195 | 0, | |
2196 | XFS_DEFAULT_LOG_COUNT))) { | |
2197 | xfs_trans_cancel(tp, 0); | |
014c2544 | 2198 | return error; |
1da177e4 LT |
2199 | } |
2200 | ||
2201 | xfs_mod_sb(tp, flags); | |
e5720eec | 2202 | error = xfs_trans_commit(tp, 0); |
1da177e4 | 2203 | |
e5720eec | 2204 | return error; |
1da177e4 LT |
2205 | } |
2206 | ||
2207 | ||
2208 | /* --------------- utility functions for vnodeops ---------------- */ | |
2209 | ||
2210 | ||
2211 | /* | |
2212 | * Given an inode, a uid and gid (from cred_t) make sure that we have | |
2213 | * allocated relevant dquot(s) on disk, and that we won't exceed inode | |
2214 | * quotas by creating this file. | |
2215 | * This also attaches dquot(s) to the given inode after locking it, | |
2216 | * and returns the dquots corresponding to the uid and/or gid. | |
2217 | * | |
2218 | * in : inode (unlocked) | |
2219 | * out : udquot, gdquot with references taken and unlocked | |
2220 | */ | |
2221 | int | |
2222 | xfs_qm_vop_dqalloc( | |
7d095257 CH |
2223 | struct xfs_inode *ip, |
2224 | uid_t uid, | |
2225 | gid_t gid, | |
2226 | prid_t prid, | |
2227 | uint flags, | |
2228 | struct xfs_dquot **O_udqpp, | |
2229 | struct xfs_dquot **O_gdqpp) | |
1da177e4 | 2230 | { |
7d095257 CH |
2231 | struct xfs_mount *mp = ip->i_mount; |
2232 | struct xfs_dquot *uq, *gq; | |
2233 | int error; | |
2234 | uint lockflags; | |
1da177e4 | 2235 | |
7d095257 | 2236 | if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) |
1da177e4 LT |
2237 | return 0; |
2238 | ||
2239 | lockflags = XFS_ILOCK_EXCL; | |
2240 | xfs_ilock(ip, lockflags); | |
2241 | ||
bd186aa9 | 2242 | if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip)) |
1da177e4 LT |
2243 | gid = ip->i_d.di_gid; |
2244 | ||
2245 | /* | |
2246 | * Attach the dquot(s) to this inode, doing a dquot allocation | |
2247 | * if necessary. The dquot(s) will not be locked. | |
2248 | */ | |
2249 | if (XFS_NOT_DQATTACHED(mp, ip)) { | |
7d095257 CH |
2250 | error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC); |
2251 | if (error) { | |
1da177e4 | 2252 | xfs_iunlock(ip, lockflags); |
014c2544 | 2253 | return error; |
1da177e4 LT |
2254 | } |
2255 | } | |
2256 | ||
2257 | uq = gq = NULL; | |
c8ad20ff | 2258 | if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) { |
1da177e4 LT |
2259 | if (ip->i_d.di_uid != uid) { |
2260 | /* | |
2261 | * What we need is the dquot that has this uid, and | |
2262 | * if we send the inode to dqget, the uid of the inode | |
2263 | * takes priority over what's sent in the uid argument. | |
2264 | * We must unlock inode here before calling dqget if | |
2265 | * we're not sending the inode, because otherwise | |
2266 | * we'll deadlock by doing trans_reserve while | |
2267 | * holding ilock. | |
2268 | */ | |
2269 | xfs_iunlock(ip, lockflags); | |
2270 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid, | |
2271 | XFS_DQ_USER, | |
2272 | XFS_QMOPT_DQALLOC | | |
2273 | XFS_QMOPT_DOWARN, | |
2274 | &uq))) { | |
2275 | ASSERT(error != ENOENT); | |
014c2544 | 2276 | return error; |
1da177e4 LT |
2277 | } |
2278 | /* | |
2279 | * Get the ilock in the right order. | |
2280 | */ | |
2281 | xfs_dqunlock(uq); | |
2282 | lockflags = XFS_ILOCK_SHARED; | |
2283 | xfs_ilock(ip, lockflags); | |
2284 | } else { | |
2285 | /* | |
2286 | * Take an extra reference, because we'll return | |
2287 | * this to caller | |
2288 | */ | |
2289 | ASSERT(ip->i_udquot); | |
2290 | uq = ip->i_udquot; | |
2291 | xfs_dqlock(uq); | |
2292 | XFS_DQHOLD(uq); | |
2293 | xfs_dqunlock(uq); | |
2294 | } | |
2295 | } | |
c8ad20ff | 2296 | if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) { |
1da177e4 LT |
2297 | if (ip->i_d.di_gid != gid) { |
2298 | xfs_iunlock(ip, lockflags); | |
2299 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid, | |
2300 | XFS_DQ_GROUP, | |
2301 | XFS_QMOPT_DQALLOC | | |
2302 | XFS_QMOPT_DOWARN, | |
2303 | &gq))) { | |
2304 | if (uq) | |
2305 | xfs_qm_dqrele(uq); | |
2306 | ASSERT(error != ENOENT); | |
014c2544 | 2307 | return error; |
1da177e4 LT |
2308 | } |
2309 | xfs_dqunlock(gq); | |
2310 | lockflags = XFS_ILOCK_SHARED; | |
2311 | xfs_ilock(ip, lockflags); | |
2312 | } else { | |
2313 | ASSERT(ip->i_gdquot); | |
2314 | gq = ip->i_gdquot; | |
2315 | xfs_dqlock(gq); | |
2316 | XFS_DQHOLD(gq); | |
2317 | xfs_dqunlock(gq); | |
2318 | } | |
c8ad20ff NS |
2319 | } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) { |
2320 | if (ip->i_d.di_projid != prid) { | |
2321 | xfs_iunlock(ip, lockflags); | |
2322 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid, | |
2323 | XFS_DQ_PROJ, | |
2324 | XFS_QMOPT_DQALLOC | | |
2325 | XFS_QMOPT_DOWARN, | |
2326 | &gq))) { | |
2327 | if (uq) | |
2328 | xfs_qm_dqrele(uq); | |
2329 | ASSERT(error != ENOENT); | |
2330 | return (error); | |
2331 | } | |
2332 | xfs_dqunlock(gq); | |
2333 | lockflags = XFS_ILOCK_SHARED; | |
2334 | xfs_ilock(ip, lockflags); | |
2335 | } else { | |
2336 | ASSERT(ip->i_gdquot); | |
2337 | gq = ip->i_gdquot; | |
2338 | xfs_dqlock(gq); | |
2339 | XFS_DQHOLD(gq); | |
2340 | xfs_dqunlock(gq); | |
2341 | } | |
1da177e4 LT |
2342 | } |
2343 | if (uq) | |
0b1b213f | 2344 | trace_xfs_dquot_dqalloc(ip); |
1da177e4 LT |
2345 | |
2346 | xfs_iunlock(ip, lockflags); | |
2347 | if (O_udqpp) | |
2348 | *O_udqpp = uq; | |
2349 | else if (uq) | |
2350 | xfs_qm_dqrele(uq); | |
2351 | if (O_gdqpp) | |
2352 | *O_gdqpp = gq; | |
2353 | else if (gq) | |
2354 | xfs_qm_dqrele(gq); | |
014c2544 | 2355 | return 0; |
1da177e4 LT |
2356 | } |
2357 | ||
2358 | /* | |
2359 | * Actually transfer ownership, and do dquot modifications. | |
2360 | * These were already reserved. | |
2361 | */ | |
2362 | xfs_dquot_t * | |
2363 | xfs_qm_vop_chown( | |
2364 | xfs_trans_t *tp, | |
2365 | xfs_inode_t *ip, | |
2366 | xfs_dquot_t **IO_olddq, | |
2367 | xfs_dquot_t *newdq) | |
2368 | { | |
2369 | xfs_dquot_t *prevdq; | |
06d10dd9 NS |
2370 | uint bfield = XFS_IS_REALTIME_INODE(ip) ? |
2371 | XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT; | |
2372 | ||
7d095257 | 2373 | |
579aa9ca | 2374 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
2375 | ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount)); |
2376 | ||
2377 | /* old dquot */ | |
2378 | prevdq = *IO_olddq; | |
2379 | ASSERT(prevdq); | |
2380 | ASSERT(prevdq != newdq); | |
2381 | ||
06d10dd9 NS |
2382 | xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks)); |
2383 | xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1); | |
1da177e4 LT |
2384 | |
2385 | /* the sparkling new dquot */ | |
06d10dd9 NS |
2386 | xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks); |
2387 | xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1); | |
1da177e4 LT |
2388 | |
2389 | /* | |
2390 | * Take an extra reference, because the inode | |
2391 | * is going to keep this dquot pointer even | |
2392 | * after the trans_commit. | |
2393 | */ | |
2394 | xfs_dqlock(newdq); | |
2395 | XFS_DQHOLD(newdq); | |
2396 | xfs_dqunlock(newdq); | |
2397 | *IO_olddq = newdq; | |
2398 | ||
014c2544 | 2399 | return prevdq; |
1da177e4 LT |
2400 | } |
2401 | ||
2402 | /* | |
c8ad20ff | 2403 | * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID). |
1da177e4 LT |
2404 | */ |
2405 | int | |
2406 | xfs_qm_vop_chown_reserve( | |
2407 | xfs_trans_t *tp, | |
2408 | xfs_inode_t *ip, | |
2409 | xfs_dquot_t *udqp, | |
2410 | xfs_dquot_t *gdqp, | |
2411 | uint flags) | |
2412 | { | |
7d095257 | 2413 | xfs_mount_t *mp = ip->i_mount; |
9a2a7de2 | 2414 | uint delblks, blkflags, prjflags = 0; |
1da177e4 | 2415 | xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq; |
7d095257 CH |
2416 | int error; |
2417 | ||
1da177e4 | 2418 | |
579aa9ca | 2419 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
1da177e4 LT |
2420 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
2421 | ||
2422 | delblks = ip->i_delayed_blks; | |
2423 | delblksudq = delblksgdq = unresudq = unresgdq = NULL; | |
06d10dd9 NS |
2424 | blkflags = XFS_IS_REALTIME_INODE(ip) ? |
2425 | XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
2426 | |
2427 | if (XFS_IS_UQUOTA_ON(mp) && udqp && | |
1149d96a | 2428 | ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) { |
1da177e4 LT |
2429 | delblksudq = udqp; |
2430 | /* | |
2431 | * If there are delayed allocation blocks, then we have to | |
2432 | * unreserve those from the old dquot, and add them to the | |
2433 | * new dquot. | |
2434 | */ | |
2435 | if (delblks) { | |
2436 | ASSERT(ip->i_udquot); | |
2437 | unresudq = ip->i_udquot; | |
2438 | } | |
2439 | } | |
c8ad20ff | 2440 | if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) { |
9a2a7de2 NS |
2441 | if (XFS_IS_PQUOTA_ON(ip->i_mount) && |
2442 | ip->i_d.di_projid != be32_to_cpu(gdqp->q_core.d_id)) | |
2443 | prjflags = XFS_QMOPT_ENOSPC; | |
2444 | ||
2445 | if (prjflags || | |
2446 | (XFS_IS_GQUOTA_ON(ip->i_mount) && | |
2447 | ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) { | |
c8ad20ff NS |
2448 | delblksgdq = gdqp; |
2449 | if (delblks) { | |
2450 | ASSERT(ip->i_gdquot); | |
2451 | unresgdq = ip->i_gdquot; | |
2452 | } | |
1da177e4 LT |
2453 | } |
2454 | } | |
2455 | ||
2456 | if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount, | |
2457 | delblksudq, delblksgdq, ip->i_d.di_nblocks, 1, | |
9a2a7de2 | 2458 | flags | blkflags | prjflags))) |
1da177e4 LT |
2459 | return (error); |
2460 | ||
2461 | /* | |
2462 | * Do the delayed blks reservations/unreservations now. Since, these | |
2463 | * are done without the help of a transaction, if a reservation fails | |
2464 | * its previous reservations won't be automatically undone by trans | |
2465 | * code. So, we have to do it manually here. | |
2466 | */ | |
2467 | if (delblks) { | |
2468 | /* | |
2469 | * Do the reservations first. Unreservation can't fail. | |
2470 | */ | |
2471 | ASSERT(delblksudq || delblksgdq); | |
2472 | ASSERT(unresudq || unresgdq); | |
2473 | if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2474 | delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0, | |
9a2a7de2 | 2475 | flags | blkflags | prjflags))) |
1da177e4 LT |
2476 | return (error); |
2477 | xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2478 | unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0, | |
06d10dd9 | 2479 | blkflags); |
1da177e4 LT |
2480 | } |
2481 | ||
2482 | return (0); | |
2483 | } | |
2484 | ||
2485 | int | |
2486 | xfs_qm_vop_rename_dqattach( | |
7d095257 | 2487 | struct xfs_inode **i_tab) |
1da177e4 | 2488 | { |
7d095257 CH |
2489 | struct xfs_mount *mp = i_tab[0]->i_mount; |
2490 | int i; | |
1da177e4 | 2491 | |
7d095257 | 2492 | if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) |
014c2544 | 2493 | return 0; |
1da177e4 | 2494 | |
7d095257 CH |
2495 | for (i = 0; (i < 4 && i_tab[i]); i++) { |
2496 | struct xfs_inode *ip = i_tab[i]; | |
2497 | int error; | |
2498 | ||
1da177e4 LT |
2499 | /* |
2500 | * Watch out for duplicate entries in the table. | |
2501 | */ | |
7d095257 CH |
2502 | if (i == 0 || ip != i_tab[i-1]) { |
2503 | if (XFS_NOT_DQATTACHED(mp, ip)) { | |
1da177e4 LT |
2504 | error = xfs_qm_dqattach(ip, 0); |
2505 | if (error) | |
014c2544 | 2506 | return error; |
1da177e4 LT |
2507 | } |
2508 | } | |
2509 | } | |
014c2544 | 2510 | return 0; |
1da177e4 LT |
2511 | } |
2512 | ||
2513 | void | |
7d095257 CH |
2514 | xfs_qm_vop_create_dqattach( |
2515 | struct xfs_trans *tp, | |
2516 | struct xfs_inode *ip, | |
2517 | struct xfs_dquot *udqp, | |
2518 | struct xfs_dquot *gdqp) | |
1da177e4 | 2519 | { |
7d095257 CH |
2520 | struct xfs_mount *mp = tp->t_mountp; |
2521 | ||
2522 | if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) | |
1da177e4 LT |
2523 | return; |
2524 | ||
579aa9ca | 2525 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
7d095257 | 2526 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
1da177e4 LT |
2527 | |
2528 | if (udqp) { | |
2529 | xfs_dqlock(udqp); | |
2530 | XFS_DQHOLD(udqp); | |
2531 | xfs_dqunlock(udqp); | |
2532 | ASSERT(ip->i_udquot == NULL); | |
2533 | ip->i_udquot = udqp; | |
7d095257 | 2534 | ASSERT(XFS_IS_UQUOTA_ON(mp)); |
1149d96a | 2535 | ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id)); |
1da177e4 LT |
2536 | xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1); |
2537 | } | |
2538 | if (gdqp) { | |
2539 | xfs_dqlock(gdqp); | |
2540 | XFS_DQHOLD(gdqp); | |
2541 | xfs_dqunlock(gdqp); | |
2542 | ASSERT(ip->i_gdquot == NULL); | |
2543 | ip->i_gdquot = gdqp; | |
7d095257 CH |
2544 | ASSERT(XFS_IS_OQUOTA_ON(mp)); |
2545 | ASSERT((XFS_IS_GQUOTA_ON(mp) ? | |
ee2a4f7c NS |
2546 | ip->i_d.di_gid : ip->i_d.di_projid) == |
2547 | be32_to_cpu(gdqp->q_core.d_id)); | |
1da177e4 LT |
2548 | xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1); |
2549 | } | |
2550 | } | |
2551 | ||
2552 | /* ------------- list stuff -----------------*/ | |
ba0f32d4 | 2553 | STATIC void |
1da177e4 LT |
2554 | xfs_qm_freelist_init(xfs_frlist_t *ql) |
2555 | { | |
2556 | ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql; | |
794ee1ba | 2557 | mutex_init(&ql->qh_lock); |
1da177e4 LT |
2558 | ql->qh_version = 0; |
2559 | ql->qh_nelems = 0; | |
2560 | } | |
2561 | ||
ba0f32d4 | 2562 | STATIC void |
1da177e4 LT |
2563 | xfs_qm_freelist_destroy(xfs_frlist_t *ql) |
2564 | { | |
2565 | xfs_dquot_t *dqp, *nextdqp; | |
2566 | ||
794ee1ba | 2567 | mutex_lock(&ql->qh_lock); |
1da177e4 LT |
2568 | for (dqp = ql->qh_next; |
2569 | dqp != (xfs_dquot_t *)ql; ) { | |
2570 | xfs_dqlock(dqp); | |
2571 | nextdqp = dqp->dq_flnext; | |
2572 | #ifdef QUOTADEBUG | |
2573 | cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp); | |
2574 | #endif | |
2575 | XQM_FREELIST_REMOVE(dqp); | |
2576 | xfs_dqunlock(dqp); | |
2577 | xfs_qm_dqdestroy(dqp); | |
2578 | dqp = nextdqp; | |
2579 | } | |
20722a91 | 2580 | mutex_unlock(&ql->qh_lock); |
1da177e4 LT |
2581 | mutex_destroy(&ql->qh_lock); |
2582 | ||
2583 | ASSERT(ql->qh_nelems == 0); | |
2584 | } | |
2585 | ||
ba0f32d4 | 2586 | STATIC void |
1da177e4 LT |
2587 | xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq) |
2588 | { | |
2589 | dq->dq_flnext = ql->qh_next; | |
2590 | dq->dq_flprev = (xfs_dquot_t *)ql; | |
2591 | ql->qh_next = dq; | |
2592 | dq->dq_flnext->dq_flprev = dq; | |
2593 | xfs_Gqm->qm_dqfreelist.qh_nelems++; | |
2594 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2595 | } | |
2596 | ||
2597 | void | |
2598 | xfs_qm_freelist_unlink(xfs_dquot_t *dq) | |
2599 | { | |
2600 | xfs_dquot_t *next = dq->dq_flnext; | |
2601 | xfs_dquot_t *prev = dq->dq_flprev; | |
2602 | ||
2603 | next->dq_flprev = prev; | |
2604 | prev->dq_flnext = next; | |
2605 | dq->dq_flnext = dq->dq_flprev = dq; | |
2606 | xfs_Gqm->qm_dqfreelist.qh_nelems--; | |
2607 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2608 | } | |
2609 | ||
2610 | void | |
2611 | xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq) | |
2612 | { | |
2613 | xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq); | |
2614 | } |