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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 LT |
49 | #include "xfs_qm.h" |
50 | ||
51 | /* | |
52 | * The global quota manager. There is only one of these for the entire | |
53 | * system, _not_ one per file system. XQM keeps track of the overall | |
54 | * quota functionality, including maintaining the freelist and hash | |
55 | * tables of dquots. | |
56 | */ | |
a0b0b8a5 | 57 | struct mutex xfs_Gqm_lock; |
1da177e4 | 58 | struct xfs_qm *xfs_Gqm; |
6b3f6b5b | 59 | uint ndquot; |
1da177e4 LT |
60 | |
61 | kmem_zone_t *qm_dqzone; | |
62 | kmem_zone_t *qm_dqtrxzone; | |
1da177e4 | 63 | |
7989cb8e | 64 | static cred_t xfs_zerocr; |
dae81d47 | 65 | |
1da177e4 LT |
66 | STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int); |
67 | STATIC void xfs_qm_list_destroy(xfs_dqlist_t *); | |
68 | ||
ba0f32d4 CH |
69 | STATIC void xfs_qm_freelist_init(xfs_frlist_t *); |
70 | STATIC void xfs_qm_freelist_destroy(xfs_frlist_t *); | |
ba0f32d4 | 71 | |
1da177e4 | 72 | STATIC int xfs_qm_init_quotainos(xfs_mount_t *); |
ba0f32d4 | 73 | STATIC int xfs_qm_init_quotainfo(xfs_mount_t *); |
51bfb75b | 74 | STATIC int xfs_qm_shake(int, gfp_t); |
1da177e4 | 75 | |
8e1f936b RR |
76 | static struct shrinker xfs_qm_shaker = { |
77 | .shrink = xfs_qm_shake, | |
78 | .seeks = DEFAULT_SEEKS, | |
79 | }; | |
80 | ||
1da177e4 | 81 | #ifdef DEBUG |
a0b0b8a5 | 82 | extern struct mutex qcheck_lock; |
1da177e4 LT |
83 | #endif |
84 | ||
85 | #ifdef QUOTADEBUG | |
86 | #define XQM_LIST_PRINT(l, NXT, title) \ | |
87 | { \ | |
88 | xfs_dquot_t *dqp; int i = 0; \ | |
89 | cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \ | |
90 | for (dqp = (l)->qh_next; dqp != NULL; dqp = dqp->NXT) { \ | |
91 | cmn_err(CE_DEBUG, " %d. \"%d (%s)\" " \ | |
92 | "bcnt = %d, icnt = %d, refs = %d", \ | |
1149d96a | 93 | ++i, (int) be32_to_cpu(dqp->q_core.d_id), \ |
1da177e4 | 94 | DQFLAGTO_TYPESTR(dqp), \ |
1149d96a CH |
95 | (int) be64_to_cpu(dqp->q_core.d_bcount), \ |
96 | (int) be64_to_cpu(dqp->q_core.d_icount), \ | |
1da177e4 LT |
97 | (int) dqp->q_nrefs); } \ |
98 | } | |
99 | #else | |
100 | #define XQM_LIST_PRINT(l, NXT, title) do { } while (0) | |
101 | #endif | |
102 | ||
103 | /* | |
104 | * Initialize the XQM structure. | |
105 | * Note that there is not one quota manager per file system. | |
106 | */ | |
107 | STATIC struct xfs_qm * | |
108 | xfs_Gqm_init(void) | |
109 | { | |
6b3f6b5b NS |
110 | xfs_dqhash_t *udqhash, *gdqhash; |
111 | xfs_qm_t *xqm; | |
215101c3 NS |
112 | size_t hsize; |
113 | uint i; | |
1da177e4 LT |
114 | |
115 | /* | |
116 | * Initialize the dquot hash tables. | |
117 | */ | |
77e4635a | 118 | udqhash = kmem_zalloc_greedy(&hsize, |
5995cb7d ES |
119 | XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t), |
120 | XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t), | |
77e4635a NS |
121 | KM_SLEEP | KM_MAYFAIL | KM_LARGE); |
122 | gdqhash = kmem_zalloc(hsize, KM_SLEEP | KM_LARGE); | |
123 | hsize /= sizeof(xfs_dqhash_t); | |
6b3f6b5b | 124 | ndquot = hsize << 8; |
1da177e4 | 125 | |
6b3f6b5b NS |
126 | xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP); |
127 | xqm->qm_dqhashmask = hsize - 1; | |
128 | xqm->qm_usr_dqhtable = udqhash; | |
129 | xqm->qm_grp_dqhtable = gdqhash; | |
1da177e4 LT |
130 | ASSERT(xqm->qm_usr_dqhtable != NULL); |
131 | ASSERT(xqm->qm_grp_dqhtable != NULL); | |
132 | ||
133 | for (i = 0; i < hsize; i++) { | |
134 | xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i); | |
135 | xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i); | |
136 | } | |
137 | ||
138 | /* | |
139 | * Freelist of all dquots of all file systems | |
140 | */ | |
141 | xfs_qm_freelist_init(&(xqm->qm_dqfreelist)); | |
142 | ||
143 | /* | |
144 | * dquot zone. we register our own low-memory callback. | |
145 | */ | |
146 | if (!qm_dqzone) { | |
147 | xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t), | |
148 | "xfs_dquots"); | |
149 | qm_dqzone = xqm->qm_dqzone; | |
150 | } else | |
151 | xqm->qm_dqzone = qm_dqzone; | |
152 | ||
8e1f936b | 153 | register_shrinker(&xfs_qm_shaker); |
1da177e4 LT |
154 | |
155 | /* | |
156 | * The t_dqinfo portion of transactions. | |
157 | */ | |
158 | if (!qm_dqtrxzone) { | |
159 | xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t), | |
160 | "xfs_dqtrx"); | |
161 | qm_dqtrxzone = xqm->qm_dqtrxzone; | |
162 | } else | |
163 | xqm->qm_dqtrxzone = qm_dqtrxzone; | |
164 | ||
165 | atomic_set(&xqm->qm_totaldquots, 0); | |
166 | xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO; | |
167 | xqm->qm_nrefs = 0; | |
168 | #ifdef DEBUG | |
c2e81432 | 169 | mutex_init(&qcheck_lock); |
1da177e4 LT |
170 | #endif |
171 | return xqm; | |
172 | } | |
173 | ||
174 | /* | |
175 | * Destroy the global quota manager when its reference count goes to zero. | |
176 | */ | |
ba0f32d4 | 177 | STATIC void |
1da177e4 LT |
178 | xfs_qm_destroy( |
179 | struct xfs_qm *xqm) | |
180 | { | |
181 | int hsize, i; | |
182 | ||
183 | ASSERT(xqm != NULL); | |
184 | ASSERT(xqm->qm_nrefs == 0); | |
8e1f936b | 185 | unregister_shrinker(&xfs_qm_shaker); |
1da177e4 LT |
186 | hsize = xqm->qm_dqhashmask + 1; |
187 | for (i = 0; i < hsize; i++) { | |
188 | xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i])); | |
189 | xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i])); | |
190 | } | |
f0e2d93c DV |
191 | kmem_free(xqm->qm_usr_dqhtable); |
192 | kmem_free(xqm->qm_grp_dqhtable); | |
1da177e4 LT |
193 | xqm->qm_usr_dqhtable = NULL; |
194 | xqm->qm_grp_dqhtable = NULL; | |
195 | xqm->qm_dqhashmask = 0; | |
196 | xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist)); | |
197 | #ifdef DEBUG | |
198 | mutex_destroy(&qcheck_lock); | |
199 | #endif | |
f0e2d93c | 200 | kmem_free(xqm); |
1da177e4 LT |
201 | } |
202 | ||
203 | /* | |
204 | * Called at mount time to let XQM know that another file system is | |
205 | * starting quotas. This isn't crucial information as the individual mount | |
206 | * structures are pretty independent, but it helps the XQM keep a | |
207 | * global view of what's going on. | |
208 | */ | |
209 | /* ARGSUSED */ | |
210 | STATIC int | |
211 | xfs_qm_hold_quotafs_ref( | |
212 | struct xfs_mount *mp) | |
213 | { | |
214 | /* | |
215 | * Need to lock the xfs_Gqm structure for things like this. For example, | |
216 | * the structure could disappear between the entry to this routine and | |
217 | * a HOLD operation if not locked. | |
218 | */ | |
e2494582 | 219 | mutex_lock(&xfs_Gqm_lock); |
1da177e4 LT |
220 | |
221 | if (xfs_Gqm == NULL) | |
222 | xfs_Gqm = xfs_Gqm_init(); | |
223 | /* | |
224 | * We can keep a list of all filesystems with quotas mounted for | |
225 | * debugging and statistical purposes, but ... | |
226 | * Just take a reference and get out. | |
227 | */ | |
e2494582 CH |
228 | xfs_Gqm->qm_nrefs++; |
229 | mutex_unlock(&xfs_Gqm_lock); | |
1da177e4 LT |
230 | |
231 | return 0; | |
232 | } | |
233 | ||
234 | ||
235 | /* | |
236 | * Release the reference that a filesystem took at mount time, | |
237 | * so that we know when we need to destroy the entire quota manager. | |
238 | */ | |
239 | /* ARGSUSED */ | |
240 | STATIC void | |
241 | xfs_qm_rele_quotafs_ref( | |
242 | struct xfs_mount *mp) | |
243 | { | |
244 | xfs_dquot_t *dqp, *nextdqp; | |
245 | ||
246 | ASSERT(xfs_Gqm); | |
247 | ASSERT(xfs_Gqm->qm_nrefs > 0); | |
248 | ||
249 | /* | |
250 | * Go thru the freelist and destroy all inactive dquots. | |
251 | */ | |
252 | xfs_qm_freelist_lock(xfs_Gqm); | |
253 | ||
254 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
255 | dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) { | |
256 | xfs_dqlock(dqp); | |
257 | nextdqp = dqp->dq_flnext; | |
258 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
259 | ASSERT(dqp->q_mount == NULL); | |
260 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
261 | ASSERT(dqp->HL_PREVP == NULL); | |
262 | ASSERT(dqp->MPL_PREVP == NULL); | |
263 | XQM_FREELIST_REMOVE(dqp); | |
264 | xfs_dqunlock(dqp); | |
265 | xfs_qm_dqdestroy(dqp); | |
266 | } else { | |
267 | xfs_dqunlock(dqp); | |
268 | } | |
269 | dqp = nextdqp; | |
270 | } | |
271 | xfs_qm_freelist_unlock(xfs_Gqm); | |
272 | ||
273 | /* | |
274 | * Destroy the entire XQM. If somebody mounts with quotaon, this'll | |
275 | * be restarted. | |
276 | */ | |
e2494582 CH |
277 | mutex_lock(&xfs_Gqm_lock); |
278 | if (--xfs_Gqm->qm_nrefs == 0) { | |
1da177e4 LT |
279 | xfs_qm_destroy(xfs_Gqm); |
280 | xfs_Gqm = NULL; | |
281 | } | |
e2494582 | 282 | mutex_unlock(&xfs_Gqm_lock); |
1da177e4 LT |
283 | } |
284 | ||
1da177e4 LT |
285 | /* |
286 | * Just destroy the quotainfo structure. | |
287 | */ | |
288 | void | |
7d095257 CH |
289 | xfs_qm_unmount( |
290 | struct xfs_mount *mp) | |
1da177e4 | 291 | { |
7d095257 CH |
292 | if (mp->m_quotainfo) { |
293 | xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_UMOUNTING); | |
1da177e4 | 294 | xfs_qm_destroy_quotainfo(mp); |
7d095257 | 295 | } |
1da177e4 LT |
296 | } |
297 | ||
298 | ||
299 | /* | |
300 | * This is called from xfs_mountfs to start quotas and initialize all | |
301 | * necessary data structures like quotainfo. This is also responsible for | |
302 | * running a quotacheck as necessary. We are guaranteed that the superblock | |
303 | * is consistently read in at this point. | |
53aa7915 DC |
304 | * |
305 | * If we fail here, the mount will continue with quota turned off. We don't | |
306 | * need to inidicate success or failure at all. | |
1da177e4 | 307 | */ |
53aa7915 | 308 | void |
1da177e4 | 309 | xfs_qm_mount_quotas( |
4249023a | 310 | xfs_mount_t *mp) |
1da177e4 | 311 | { |
1da177e4 LT |
312 | int error = 0; |
313 | uint sbf; | |
314 | ||
1da177e4 LT |
315 | /* |
316 | * If quotas on realtime volumes is not supported, we disable | |
317 | * quotas immediately. | |
318 | */ | |
319 | if (mp->m_sb.sb_rextents) { | |
320 | cmn_err(CE_NOTE, | |
321 | "Cannot turn on quotas for realtime filesystem %s", | |
322 | mp->m_fsname); | |
323 | mp->m_qflags = 0; | |
324 | goto write_changes; | |
325 | } | |
326 | ||
1da177e4 | 327 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
155ffd07 | 328 | |
1da177e4 LT |
329 | /* |
330 | * Allocate the quotainfo structure inside the mount struct, and | |
331 | * create quotainode(s), and change/rev superblock if necessary. | |
332 | */ | |
53aa7915 DC |
333 | error = xfs_qm_init_quotainfo(mp); |
334 | if (error) { | |
1da177e4 LT |
335 | /* |
336 | * We must turn off quotas. | |
337 | */ | |
338 | ASSERT(mp->m_quotainfo == NULL); | |
339 | mp->m_qflags = 0; | |
340 | goto write_changes; | |
341 | } | |
342 | /* | |
343 | * If any of the quotas are not consistent, do a quotacheck. | |
344 | */ | |
4249023a | 345 | if (XFS_QM_NEED_QUOTACHECK(mp)) { |
53aa7915 DC |
346 | error = xfs_qm_quotacheck(mp); |
347 | if (error) { | |
348 | /* Quotacheck failed and disabled quotas. */ | |
349 | return; | |
1da177e4 | 350 | } |
1da177e4 | 351 | } |
646d5bda DD |
352 | /* |
353 | * If one type of quotas is off, then it will lose its | |
354 | * quotachecked status, since we won't be doing accounting for | |
355 | * that type anymore. | |
356 | */ | |
53aa7915 | 357 | if (!XFS_IS_UQUOTA_ON(mp)) |
646d5bda | 358 | mp->m_qflags &= ~XFS_UQUOTA_CHKD; |
53aa7915 | 359 | if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp))) |
646d5bda | 360 | mp->m_qflags &= ~XFS_OQUOTA_CHKD; |
155ffd07 | 361 | |
1da177e4 LT |
362 | write_changes: |
363 | /* | |
3685c2a1 | 364 | * We actually don't have to acquire the m_sb_lock at all. |
1da177e4 LT |
365 | * This can only be called from mount, and that's single threaded. XXX |
366 | */ | |
3685c2a1 | 367 | spin_lock(&mp->m_sb_lock); |
1da177e4 LT |
368 | sbf = mp->m_sb.sb_qflags; |
369 | mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL; | |
3685c2a1 | 370 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
371 | |
372 | if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) { | |
373 | if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) { | |
374 | /* | |
375 | * We could only have been turning quotas off. | |
376 | * We aren't in very good shape actually because | |
377 | * the incore structures are convinced that quotas are | |
378 | * off, but the on disk superblock doesn't know that ! | |
379 | */ | |
380 | ASSERT(!(XFS_IS_QUOTA_RUNNING(mp))); | |
381 | xfs_fs_cmn_err(CE_ALERT, mp, | |
382 | "XFS mount_quotas: Superblock update failed!"); | |
383 | } | |
384 | } | |
385 | ||
386 | if (error) { | |
387 | xfs_fs_cmn_err(CE_WARN, mp, | |
388 | "Failed to initialize disk quotas."); | |
7d095257 | 389 | return; |
1da177e4 | 390 | } |
7d095257 CH |
391 | |
392 | #ifdef QUOTADEBUG | |
393 | if (XFS_IS_QUOTA_ON(mp)) | |
394 | xfs_qm_internalqcheck(mp); | |
395 | #endif | |
1da177e4 LT |
396 | } |
397 | ||
398 | /* | |
399 | * Called from the vfsops layer. | |
400 | */ | |
e57481dc | 401 | void |
1da177e4 LT |
402 | xfs_qm_unmount_quotas( |
403 | xfs_mount_t *mp) | |
404 | { | |
1da177e4 LT |
405 | /* |
406 | * Release the dquots that root inode, et al might be holding, | |
407 | * before we flush quotas and blow away the quotainfo structure. | |
408 | */ | |
409 | ASSERT(mp->m_rootip); | |
410 | xfs_qm_dqdetach(mp->m_rootip); | |
411 | if (mp->m_rbmip) | |
412 | xfs_qm_dqdetach(mp->m_rbmip); | |
413 | if (mp->m_rsumip) | |
414 | xfs_qm_dqdetach(mp->m_rsumip); | |
415 | ||
416 | /* | |
e57481dc | 417 | * Release the quota inodes. |
1da177e4 | 418 | */ |
1da177e4 | 419 | if (mp->m_quotainfo) { |
e57481dc CH |
420 | if (mp->m_quotainfo->qi_uquotaip) { |
421 | IRELE(mp->m_quotainfo->qi_uquotaip); | |
422 | mp->m_quotainfo->qi_uquotaip = NULL; | |
1da177e4 | 423 | } |
e57481dc CH |
424 | if (mp->m_quotainfo->qi_gquotaip) { |
425 | IRELE(mp->m_quotainfo->qi_gquotaip); | |
426 | mp->m_quotainfo->qi_gquotaip = NULL; | |
1da177e4 LT |
427 | } |
428 | } | |
1da177e4 LT |
429 | } |
430 | ||
431 | /* | |
432 | * Flush all dquots of the given file system to disk. The dquots are | |
433 | * _not_ purged from memory here, just their data written to disk. | |
434 | */ | |
ba0f32d4 | 435 | STATIC int |
1da177e4 LT |
436 | xfs_qm_dqflush_all( |
437 | xfs_mount_t *mp, | |
438 | int flags) | |
439 | { | |
440 | int recl; | |
441 | xfs_dquot_t *dqp; | |
442 | int niters; | |
443 | int error; | |
444 | ||
445 | if (mp->m_quotainfo == NULL) | |
014c2544 | 446 | return 0; |
1da177e4 LT |
447 | niters = 0; |
448 | again: | |
449 | xfs_qm_mplist_lock(mp); | |
450 | FOREACH_DQUOT_IN_MP(dqp, mp) { | |
451 | xfs_dqlock(dqp); | |
452 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
453 | xfs_dqunlock(dqp); | |
454 | continue; | |
455 | } | |
456 | xfs_dqtrace_entry(dqp, "FLUSHALL: DQDIRTY"); | |
457 | /* XXX a sentinel would be better */ | |
458 | recl = XFS_QI_MPLRECLAIMS(mp); | |
e1f49cf2 | 459 | if (!xfs_dqflock_nowait(dqp)) { |
1da177e4 LT |
460 | /* |
461 | * If we can't grab the flush lock then check | |
462 | * to see if the dquot has been flushed delayed | |
463 | * write. If so, grab its buffer and send it | |
464 | * out immediately. We'll be able to acquire | |
465 | * the flush lock when the I/O completes. | |
466 | */ | |
467 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
468 | } | |
469 | /* | |
470 | * Let go of the mplist lock. We don't want to hold it | |
471 | * across a disk write. | |
472 | */ | |
473 | xfs_qm_mplist_unlock(mp); | |
474 | error = xfs_qm_dqflush(dqp, flags); | |
475 | xfs_dqunlock(dqp); | |
476 | if (error) | |
014c2544 | 477 | return error; |
1da177e4 LT |
478 | |
479 | xfs_qm_mplist_lock(mp); | |
480 | if (recl != XFS_QI_MPLRECLAIMS(mp)) { | |
481 | xfs_qm_mplist_unlock(mp); | |
482 | /* XXX restart limit */ | |
483 | goto again; | |
484 | } | |
485 | } | |
486 | ||
487 | xfs_qm_mplist_unlock(mp); | |
488 | /* return ! busy */ | |
014c2544 | 489 | return 0; |
1da177e4 LT |
490 | } |
491 | /* | |
492 | * Release the group dquot pointers the user dquots may be | |
493 | * carrying around as a hint. mplist is locked on entry and exit. | |
494 | */ | |
495 | STATIC void | |
496 | xfs_qm_detach_gdquots( | |
497 | xfs_mount_t *mp) | |
498 | { | |
499 | xfs_dquot_t *dqp, *gdqp; | |
500 | int nrecl; | |
501 | ||
502 | again: | |
503 | ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp)); | |
504 | dqp = XFS_QI_MPLNEXT(mp); | |
505 | while (dqp) { | |
506 | xfs_dqlock(dqp); | |
507 | if ((gdqp = dqp->q_gdquot)) { | |
508 | xfs_dqlock(gdqp); | |
509 | dqp->q_gdquot = NULL; | |
510 | } | |
511 | xfs_dqunlock(dqp); | |
512 | ||
513 | if (gdqp) { | |
514 | /* | |
515 | * Can't hold the mplist lock across a dqput. | |
516 | * XXXmust convert to marker based iterations here. | |
517 | */ | |
518 | nrecl = XFS_QI_MPLRECLAIMS(mp); | |
519 | xfs_qm_mplist_unlock(mp); | |
520 | xfs_qm_dqput(gdqp); | |
521 | ||
522 | xfs_qm_mplist_lock(mp); | |
523 | if (nrecl != XFS_QI_MPLRECLAIMS(mp)) | |
524 | goto again; | |
525 | } | |
526 | dqp = dqp->MPL_NEXT; | |
527 | } | |
528 | } | |
529 | ||
530 | /* | |
531 | * Go through all the incore dquots of this file system and take them | |
532 | * off the mplist and hashlist, if the dquot type matches the dqtype | |
533 | * parameter. This is used when turning off quota accounting for | |
534 | * users and/or groups, as well as when the filesystem is unmounting. | |
535 | */ | |
536 | STATIC int | |
537 | xfs_qm_dqpurge_int( | |
538 | xfs_mount_t *mp, | |
c8ad20ff | 539 | uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/PQUOTA/GQUOTA */ |
1da177e4 LT |
540 | { |
541 | xfs_dquot_t *dqp; | |
542 | uint dqtype; | |
543 | int nrecl; | |
544 | xfs_dquot_t *nextdqp; | |
545 | int nmisses; | |
546 | ||
547 | if (mp->m_quotainfo == NULL) | |
014c2544 | 548 | return 0; |
1da177e4 LT |
549 | |
550 | dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0; | |
c8ad20ff | 551 | dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0; |
1da177e4 LT |
552 | dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0; |
553 | ||
554 | xfs_qm_mplist_lock(mp); | |
555 | ||
556 | /* | |
557 | * In the first pass through all incore dquots of this filesystem, | |
558 | * we release the group dquot pointers the user dquots may be | |
559 | * carrying around as a hint. We need to do this irrespective of | |
560 | * what's being turned off. | |
561 | */ | |
562 | xfs_qm_detach_gdquots(mp); | |
563 | ||
564 | again: | |
565 | nmisses = 0; | |
566 | ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp)); | |
567 | /* | |
568 | * Try to get rid of all of the unwanted dquots. The idea is to | |
569 | * get them off mplist and hashlist, but leave them on freelist. | |
570 | */ | |
571 | dqp = XFS_QI_MPLNEXT(mp); | |
572 | while (dqp) { | |
573 | /* | |
574 | * It's OK to look at the type without taking dqlock here. | |
575 | * We're holding the mplist lock here, and that's needed for | |
576 | * a dqreclaim. | |
577 | */ | |
578 | if ((dqp->dq_flags & dqtype) == 0) { | |
579 | dqp = dqp->MPL_NEXT; | |
580 | continue; | |
581 | } | |
582 | ||
c9a192dc | 583 | if (!mutex_trylock(&dqp->q_hash->qh_lock)) { |
1da177e4 LT |
584 | nrecl = XFS_QI_MPLRECLAIMS(mp); |
585 | xfs_qm_mplist_unlock(mp); | |
c9a192dc | 586 | mutex_lock(&dqp->q_hash->qh_lock); |
1da177e4 LT |
587 | xfs_qm_mplist_lock(mp); |
588 | ||
589 | /* | |
590 | * XXXTheoretically, we can get into a very long | |
591 | * ping pong game here. | |
592 | * No one can be adding dquots to the mplist at | |
593 | * this point, but somebody might be taking things off. | |
594 | */ | |
595 | if (nrecl != XFS_QI_MPLRECLAIMS(mp)) { | |
c9a192dc | 596 | mutex_unlock(&dqp->q_hash->qh_lock); |
1da177e4 LT |
597 | goto again; |
598 | } | |
599 | } | |
600 | ||
601 | /* | |
602 | * Take the dquot off the mplist and hashlist. It may remain on | |
603 | * freelist in INACTIVE state. | |
604 | */ | |
605 | nextdqp = dqp->MPL_NEXT; | |
4f0e8a98 | 606 | nmisses += xfs_qm_dqpurge(dqp); |
1da177e4 LT |
607 | dqp = nextdqp; |
608 | } | |
609 | xfs_qm_mplist_unlock(mp); | |
610 | return nmisses; | |
611 | } | |
612 | ||
613 | int | |
614 | xfs_qm_dqpurge_all( | |
615 | xfs_mount_t *mp, | |
616 | uint flags) | |
617 | { | |
618 | int ndquots; | |
619 | ||
620 | /* | |
621 | * Purge the dquot cache. | |
622 | * None of the dquots should really be busy at this point. | |
623 | */ | |
624 | if (mp->m_quotainfo) { | |
625 | while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) { | |
626 | delay(ndquots * 10); | |
627 | } | |
628 | } | |
629 | return 0; | |
630 | } | |
631 | ||
632 | STATIC int | |
633 | xfs_qm_dqattach_one( | |
634 | xfs_inode_t *ip, | |
635 | xfs_dqid_t id, | |
636 | uint type, | |
637 | uint doalloc, | |
1da177e4 LT |
638 | xfs_dquot_t *udqhint, /* hint */ |
639 | xfs_dquot_t **IO_idqpp) | |
640 | { | |
641 | xfs_dquot_t *dqp; | |
642 | int error; | |
643 | ||
579aa9ca | 644 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 | 645 | error = 0; |
8e9b6e7f | 646 | |
1da177e4 LT |
647 | /* |
648 | * See if we already have it in the inode itself. IO_idqpp is | |
649 | * &i_udquot or &i_gdquot. This made the code look weird, but | |
650 | * made the logic a lot simpler. | |
651 | */ | |
8e9b6e7f CH |
652 | dqp = *IO_idqpp; |
653 | if (dqp) { | |
1da177e4 | 654 | xfs_dqtrace_entry(dqp, "DQATTACH: found in ip"); |
8e9b6e7f | 655 | return 0; |
1da177e4 LT |
656 | } |
657 | ||
658 | /* | |
659 | * udqhint is the i_udquot field in inode, and is non-NULL only | |
c8ad20ff | 660 | * when the type arg is group/project. Its purpose is to save a |
1da177e4 LT |
661 | * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside |
662 | * the user dquot. | |
663 | */ | |
8e9b6e7f CH |
664 | if (udqhint) { |
665 | ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ); | |
1da177e4 LT |
666 | xfs_dqlock(udqhint); |
667 | ||
8e9b6e7f CH |
668 | /* |
669 | * No need to take dqlock to look at the id. | |
670 | * | |
671 | * The ID can't change until it gets reclaimed, and it won't | |
672 | * be reclaimed as long as we have a ref from inode and we | |
673 | * hold the ilock. | |
674 | */ | |
675 | dqp = udqhint->q_gdquot; | |
676 | if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) { | |
677 | xfs_dqlock(dqp); | |
678 | XFS_DQHOLD(dqp); | |
679 | ASSERT(*IO_idqpp == NULL); | |
680 | *IO_idqpp = dqp; | |
681 | ||
1da177e4 LT |
682 | xfs_dqunlock(dqp); |
683 | xfs_dqunlock(udqhint); | |
8e9b6e7f | 684 | return 0; |
1da177e4 | 685 | } |
8e9b6e7f CH |
686 | |
687 | /* | |
688 | * We can't hold a dquot lock when we call the dqget code. | |
689 | * We'll deadlock in no time, because of (not conforming to) | |
690 | * lock ordering - the inodelock comes before any dquot lock, | |
691 | * and we may drop and reacquire the ilock in xfs_qm_dqget(). | |
692 | */ | |
1da177e4 | 693 | xfs_dqunlock(udqhint); |
8e9b6e7f CH |
694 | } |
695 | ||
1da177e4 LT |
696 | /* |
697 | * Find the dquot from somewhere. This bumps the | |
698 | * reference count of dquot and returns it locked. | |
699 | * This can return ENOENT if dquot didn't exist on | |
700 | * disk and we didn't ask it to allocate; | |
701 | * ESRCH if quotas got turned off suddenly. | |
702 | */ | |
8e9b6e7f CH |
703 | error = xfs_qm_dqget(ip->i_mount, ip, id, type, XFS_QMOPT_DOWARN, &dqp); |
704 | if (error) | |
705 | return error; | |
1da177e4 LT |
706 | |
707 | xfs_dqtrace_entry(dqp, "DQATTACH: found by dqget"); | |
8e9b6e7f | 708 | |
1da177e4 LT |
709 | /* |
710 | * dqget may have dropped and re-acquired the ilock, but it guarantees | |
711 | * that the dquot returned is the one that should go in the inode. | |
712 | */ | |
713 | *IO_idqpp = dqp; | |
8e9b6e7f CH |
714 | xfs_dqunlock(dqp); |
715 | return 0; | |
1da177e4 LT |
716 | } |
717 | ||
718 | ||
719 | /* | |
720 | * Given a udquot and gdquot, attach a ptr to the group dquot in the | |
721 | * udquot as a hint for future lookups. The idea sounds simple, but the | |
722 | * execution isn't, because the udquot might have a group dquot attached | |
c41564b5 | 723 | * already and getting rid of that gets us into lock ordering constraints. |
1da177e4 LT |
724 | * The process is complicated more by the fact that the dquots may or may not |
725 | * be locked on entry. | |
726 | */ | |
727 | STATIC void | |
728 | xfs_qm_dqattach_grouphint( | |
729 | xfs_dquot_t *udq, | |
8e9b6e7f | 730 | xfs_dquot_t *gdq) |
1da177e4 LT |
731 | { |
732 | xfs_dquot_t *tmp; | |
733 | ||
8e9b6e7f | 734 | xfs_dqlock(udq); |
1da177e4 LT |
735 | |
736 | if ((tmp = udq->q_gdquot)) { | |
737 | if (tmp == gdq) { | |
8e9b6e7f | 738 | xfs_dqunlock(udq); |
1da177e4 LT |
739 | return; |
740 | } | |
741 | ||
742 | udq->q_gdquot = NULL; | |
743 | /* | |
744 | * We can't keep any dqlocks when calling dqrele, | |
745 | * because the freelist lock comes before dqlocks. | |
746 | */ | |
747 | xfs_dqunlock(udq); | |
1da177e4 LT |
748 | /* |
749 | * we took a hard reference once upon a time in dqget, | |
750 | * so give it back when the udquot no longer points at it | |
751 | * dqput() does the unlocking of the dquot. | |
752 | */ | |
753 | xfs_qm_dqrele(tmp); | |
754 | ||
755 | xfs_dqlock(udq); | |
756 | xfs_dqlock(gdq); | |
757 | ||
758 | } else { | |
759 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
8e9b6e7f | 760 | xfs_dqlock(gdq); |
1da177e4 LT |
761 | } |
762 | ||
763 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
764 | ASSERT(XFS_DQ_IS_LOCKED(gdq)); | |
765 | /* | |
766 | * Somebody could have attached a gdquot here, | |
767 | * when we dropped the uqlock. If so, just do nothing. | |
768 | */ | |
769 | if (udq->q_gdquot == NULL) { | |
770 | XFS_DQHOLD(gdq); | |
771 | udq->q_gdquot = gdq; | |
772 | } | |
8e9b6e7f CH |
773 | |
774 | xfs_dqunlock(gdq); | |
775 | xfs_dqunlock(udq); | |
1da177e4 LT |
776 | } |
777 | ||
778 | ||
779 | /* | |
c8ad20ff NS |
780 | * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON |
781 | * into account. | |
1da177e4 | 782 | * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed. |
1da177e4 LT |
783 | * Inode may get unlocked and relocked in here, and the caller must deal with |
784 | * the consequences. | |
785 | */ | |
786 | int | |
7d095257 | 787 | xfs_qm_dqattach_locked( |
1da177e4 LT |
788 | xfs_inode_t *ip, |
789 | uint flags) | |
790 | { | |
791 | xfs_mount_t *mp = ip->i_mount; | |
792 | uint nquotas = 0; | |
793 | int error = 0; | |
794 | ||
7d095257 CH |
795 | if (!XFS_IS_QUOTA_RUNNING(mp) || |
796 | !XFS_IS_QUOTA_ON(mp) || | |
797 | !XFS_NOT_DQATTACHED(mp, ip) || | |
798 | ip->i_ino == mp->m_sb.sb_uquotino || | |
799 | ip->i_ino == mp->m_sb.sb_gquotino) | |
014c2544 | 800 | return 0; |
1da177e4 | 801 | |
7d095257 | 802 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
803 | |
804 | if (XFS_IS_UQUOTA_ON(mp)) { | |
805 | error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER, | |
806 | flags & XFS_QMOPT_DQALLOC, | |
1da177e4 LT |
807 | NULL, &ip->i_udquot); |
808 | if (error) | |
809 | goto done; | |
810 | nquotas++; | |
811 | } | |
579aa9ca CH |
812 | |
813 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
c8ad20ff NS |
814 | if (XFS_IS_OQUOTA_ON(mp)) { |
815 | error = XFS_IS_GQUOTA_ON(mp) ? | |
816 | xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP, | |
817 | flags & XFS_QMOPT_DQALLOC, | |
c8ad20ff NS |
818 | ip->i_udquot, &ip->i_gdquot) : |
819 | xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ, | |
1da177e4 | 820 | flags & XFS_QMOPT_DQALLOC, |
1da177e4 LT |
821 | ip->i_udquot, &ip->i_gdquot); |
822 | /* | |
823 | * Don't worry about the udquot that we may have | |
824 | * attached above. It'll get detached, if not already. | |
825 | */ | |
826 | if (error) | |
827 | goto done; | |
828 | nquotas++; | |
829 | } | |
830 | ||
831 | /* | |
832 | * Attach this group quota to the user quota as a hint. | |
833 | * This WON'T, in general, result in a thrash. | |
834 | */ | |
835 | if (nquotas == 2) { | |
579aa9ca | 836 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
837 | ASSERT(ip->i_udquot); |
838 | ASSERT(ip->i_gdquot); | |
839 | ||
840 | /* | |
841 | * We may or may not have the i_udquot locked at this point, | |
842 | * but this check is OK since we don't depend on the i_gdquot to | |
843 | * be accurate 100% all the time. It is just a hint, and this | |
844 | * will succeed in general. | |
845 | */ | |
846 | if (ip->i_udquot->q_gdquot == ip->i_gdquot) | |
847 | goto done; | |
848 | /* | |
849 | * Attach i_gdquot to the gdquot hint inside the i_udquot. | |
850 | */ | |
8e9b6e7f | 851 | xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot); |
1da177e4 LT |
852 | } |
853 | ||
7d095257 | 854 | done: |
1da177e4 LT |
855 | #ifdef QUOTADEBUG |
856 | if (! error) { | |
1da177e4 LT |
857 | if (XFS_IS_UQUOTA_ON(mp)) |
858 | ASSERT(ip->i_udquot); | |
c8ad20ff | 859 | if (XFS_IS_OQUOTA_ON(mp)) |
1da177e4 LT |
860 | ASSERT(ip->i_gdquot); |
861 | } | |
7d095257 | 862 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 | 863 | #endif |
7d095257 CH |
864 | return error; |
865 | } | |
1da177e4 | 866 | |
7d095257 CH |
867 | int |
868 | xfs_qm_dqattach( | |
869 | struct xfs_inode *ip, | |
870 | uint flags) | |
871 | { | |
872 | int error; | |
873 | ||
874 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
875 | error = xfs_qm_dqattach_locked(ip, flags); | |
876 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1da177e4 | 877 | |
014c2544 | 878 | return error; |
1da177e4 LT |
879 | } |
880 | ||
881 | /* | |
882 | * Release dquots (and their references) if any. | |
883 | * The inode should be locked EXCL except when this's called by | |
884 | * xfs_ireclaim. | |
885 | */ | |
886 | void | |
887 | xfs_qm_dqdetach( | |
888 | xfs_inode_t *ip) | |
889 | { | |
890 | if (!(ip->i_udquot || ip->i_gdquot)) | |
891 | return; | |
892 | ||
893 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino); | |
894 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino); | |
1da177e4 | 895 | if (ip->i_udquot) { |
c8ad20ff | 896 | xfs_dqtrace_entry_ino(ip->i_udquot, "DQDETTACH", ip); |
1da177e4 LT |
897 | xfs_qm_dqrele(ip->i_udquot); |
898 | ip->i_udquot = NULL; | |
899 | } | |
900 | if (ip->i_gdquot) { | |
c8ad20ff | 901 | xfs_dqtrace_entry_ino(ip->i_gdquot, "DQDETTACH", ip); |
1da177e4 LT |
902 | xfs_qm_dqrele(ip->i_gdquot); |
903 | ip->i_gdquot = NULL; | |
904 | } | |
905 | } | |
906 | ||
1da177e4 LT |
907 | int |
908 | xfs_qm_sync( | |
909 | xfs_mount_t *mp, | |
b09cc771 | 910 | int flags) |
1da177e4 LT |
911 | { |
912 | int recl, restarts; | |
913 | xfs_dquot_t *dqp; | |
914 | uint flush_flags; | |
1da177e4 LT |
915 | int error; |
916 | ||
7d095257 | 917 | if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) |
d757762b DD |
918 | return 0; |
919 | ||
8b5403a6 | 920 | flush_flags = (flags & SYNC_WAIT) ? XFS_QMOPT_SYNC : XFS_QMOPT_DELWRI; |
1da177e4 | 921 | restarts = 0; |
1da177e4 LT |
922 | |
923 | again: | |
924 | xfs_qm_mplist_lock(mp); | |
925 | /* | |
926 | * dqpurge_all() also takes the mplist lock and iterate thru all dquots | |
927 | * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared | |
928 | * when we have the mplist lock, we know that dquots will be consistent | |
929 | * as long as we have it locked. | |
930 | */ | |
931 | if (! XFS_IS_QUOTA_ON(mp)) { | |
932 | xfs_qm_mplist_unlock(mp); | |
014c2544 | 933 | return 0; |
1da177e4 LT |
934 | } |
935 | FOREACH_DQUOT_IN_MP(dqp, mp) { | |
936 | /* | |
937 | * If this is vfs_sync calling, then skip the dquots that | |
938 | * don't 'seem' to be dirty. ie. don't acquire dqlock. | |
939 | * This is very similar to what xfs_sync does with inodes. | |
940 | */ | |
8b5403a6 CH |
941 | if (flags & SYNC_TRYLOCK) { |
942 | if (!XFS_DQ_IS_DIRTY(dqp)) | |
1da177e4 | 943 | continue; |
8b5403a6 | 944 | if (!xfs_qm_dqlock_nowait(dqp)) |
1da177e4 LT |
945 | continue; |
946 | } else { | |
947 | xfs_dqlock(dqp); | |
948 | } | |
949 | ||
950 | /* | |
951 | * Now, find out for sure if this dquot is dirty or not. | |
952 | */ | |
953 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
954 | xfs_dqunlock(dqp); | |
955 | continue; | |
956 | } | |
957 | ||
958 | /* XXX a sentinel would be better */ | |
959 | recl = XFS_QI_MPLRECLAIMS(mp); | |
e1f49cf2 | 960 | if (!xfs_dqflock_nowait(dqp)) { |
8b5403a6 | 961 | if (flags & SYNC_TRYLOCK) { |
1da177e4 LT |
962 | xfs_dqunlock(dqp); |
963 | continue; | |
964 | } | |
965 | /* | |
966 | * If we can't grab the flush lock then if the caller | |
c41564b5 | 967 | * really wanted us to give this our best shot, so |
1da177e4 LT |
968 | * see if we can give a push to the buffer before we wait |
969 | * on the flush lock. At this point, we know that | |
c41564b5 | 970 | * even though the dquot is being flushed, |
1da177e4 LT |
971 | * it has (new) dirty data. |
972 | */ | |
973 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
974 | } | |
975 | /* | |
976 | * Let go of the mplist lock. We don't want to hold it | |
977 | * across a disk write | |
978 | */ | |
1da177e4 LT |
979 | xfs_qm_mplist_unlock(mp); |
980 | xfs_dqtrace_entry(dqp, "XQM_SYNC: DQFLUSH"); | |
981 | error = xfs_qm_dqflush(dqp, flush_flags); | |
982 | xfs_dqunlock(dqp); | |
983 | if (error && XFS_FORCED_SHUTDOWN(mp)) | |
014c2544 | 984 | return 0; /* Need to prevent umount failure */ |
1da177e4 | 985 | else if (error) |
014c2544 | 986 | return error; |
1da177e4 LT |
987 | |
988 | xfs_qm_mplist_lock(mp); | |
989 | if (recl != XFS_QI_MPLRECLAIMS(mp)) { | |
990 | if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS) | |
991 | break; | |
992 | ||
993 | xfs_qm_mplist_unlock(mp); | |
994 | goto again; | |
995 | } | |
996 | } | |
997 | ||
998 | xfs_qm_mplist_unlock(mp); | |
014c2544 | 999 | return 0; |
1da177e4 LT |
1000 | } |
1001 | ||
a4edd1da CH |
1002 | /* |
1003 | * The hash chains and the mplist use the same xfs_dqhash structure as | |
1004 | * their list head, but we can take the mplist qh_lock and one of the | |
1005 | * hash qh_locks at the same time without any problem as they aren't | |
1006 | * related. | |
1007 | */ | |
1008 | static struct lock_class_key xfs_quota_mplist_class; | |
1da177e4 LT |
1009 | |
1010 | /* | |
1011 | * This initializes all the quota information that's kept in the | |
1012 | * mount structure | |
1013 | */ | |
ba0f32d4 | 1014 | STATIC int |
1da177e4 LT |
1015 | xfs_qm_init_quotainfo( |
1016 | xfs_mount_t *mp) | |
1017 | { | |
1018 | xfs_quotainfo_t *qinf; | |
1019 | int error; | |
1020 | xfs_dquot_t *dqp; | |
1021 | ||
1022 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1023 | ||
1024 | /* | |
1025 | * Tell XQM that we exist as soon as possible. | |
1026 | */ | |
1027 | if ((error = xfs_qm_hold_quotafs_ref(mp))) { | |
014c2544 | 1028 | return error; |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP); | |
1032 | ||
1033 | /* | |
1034 | * See if quotainodes are setup, and if not, allocate them, | |
1035 | * and change the superblock accordingly. | |
1036 | */ | |
1037 | if ((error = xfs_qm_init_quotainos(mp))) { | |
f0e2d93c | 1038 | kmem_free(qinf); |
1da177e4 | 1039 | mp->m_quotainfo = NULL; |
014c2544 | 1040 | return error; |
1da177e4 LT |
1041 | } |
1042 | ||
1da177e4 | 1043 | xfs_qm_list_init(&qinf->qi_dqlist, "mpdqlist", 0); |
a4edd1da CH |
1044 | lockdep_set_class(&qinf->qi_dqlist.qh_lock, &xfs_quota_mplist_class); |
1045 | ||
1da177e4 LT |
1046 | qinf->qi_dqreclaims = 0; |
1047 | ||
1048 | /* mutex used to serialize quotaoffs */ | |
794ee1ba | 1049 | mutex_init(&qinf->qi_quotaofflock); |
1da177e4 LT |
1050 | |
1051 | /* Precalc some constants */ | |
1052 | qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1053 | ASSERT(qinf->qi_dqchunklen); | |
1054 | qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen); | |
1055 | do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t)); | |
1056 | ||
1057 | mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD); | |
1058 | ||
1059 | /* | |
1060 | * We try to get the limits from the superuser's limits fields. | |
1061 | * This is quite hacky, but it is standard quota practice. | |
1062 | * We look at the USR dquot with id == 0 first, but if user quotas | |
1063 | * are not enabled we goto the GRP dquot with id == 0. | |
1064 | * We don't really care to keep separate default limits for user | |
1065 | * and group quotas, at least not at this point. | |
1066 | */ | |
1067 | error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0, | |
c8ad20ff NS |
1068 | XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER : |
1069 | (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP : | |
1070 | XFS_DQ_PROJ), | |
1da177e4 LT |
1071 | XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN, |
1072 | &dqp); | |
1073 | if (! error) { | |
1074 | xfs_disk_dquot_t *ddqp = &dqp->q_core; | |
1075 | ||
1076 | /* | |
1077 | * The warnings and timers set the grace period given to | |
1078 | * a user or group before he or she can not perform any | |
1079 | * more writing. If it is zero, a default is used. | |
1080 | */ | |
1149d96a CH |
1081 | qinf->qi_btimelimit = ddqp->d_btimer ? |
1082 | be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT; | |
1083 | qinf->qi_itimelimit = ddqp->d_itimer ? | |
1084 | be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT; | |
1085 | qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ? | |
1086 | be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT; | |
1087 | qinf->qi_bwarnlimit = ddqp->d_bwarns ? | |
1088 | be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT; | |
1089 | qinf->qi_iwarnlimit = ddqp->d_iwarns ? | |
1090 | be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT; | |
1091 | qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ? | |
1092 | be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT; | |
1093 | qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit); | |
1094 | qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit); | |
1095 | qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit); | |
1096 | qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit); | |
1097 | qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit); | |
1098 | qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit); | |
1da177e4 LT |
1099 | |
1100 | /* | |
1101 | * We sent the XFS_QMOPT_DQSUSER flag to dqget because | |
1102 | * we don't want this dquot cached. We haven't done a | |
1103 | * quotacheck yet, and quotacheck doesn't like incore dquots. | |
1104 | */ | |
1105 | xfs_qm_dqdestroy(dqp); | |
1106 | } else { | |
1107 | qinf->qi_btimelimit = XFS_QM_BTIMELIMIT; | |
1108 | qinf->qi_itimelimit = XFS_QM_ITIMELIMIT; | |
1109 | qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT; | |
1110 | qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT; | |
1111 | qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT; | |
06d10dd9 | 1112 | qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT; |
1da177e4 LT |
1113 | } |
1114 | ||
014c2544 | 1115 | return 0; |
1da177e4 LT |
1116 | } |
1117 | ||
1118 | ||
1119 | /* | |
1120 | * Gets called when unmounting a filesystem or when all quotas get | |
1121 | * turned off. | |
1122 | * This purges the quota inodes, destroys locks and frees itself. | |
1123 | */ | |
1124 | void | |
1125 | xfs_qm_destroy_quotainfo( | |
1126 | xfs_mount_t *mp) | |
1127 | { | |
1128 | xfs_quotainfo_t *qi; | |
1129 | ||
1130 | qi = mp->m_quotainfo; | |
1131 | ASSERT(qi != NULL); | |
1132 | ASSERT(xfs_Gqm != NULL); | |
1133 | ||
1134 | /* | |
1135 | * Release the reference that XQM kept, so that we know | |
1136 | * when the XQM structure should be freed. We cannot assume | |
1137 | * that xfs_Gqm is non-null after this point. | |
1138 | */ | |
1139 | xfs_qm_rele_quotafs_ref(mp); | |
1140 | ||
1da177e4 LT |
1141 | xfs_qm_list_destroy(&qi->qi_dqlist); |
1142 | ||
1143 | if (qi->qi_uquotaip) { | |
26cc0021 | 1144 | IRELE(qi->qi_uquotaip); |
1da177e4 LT |
1145 | qi->qi_uquotaip = NULL; /* paranoia */ |
1146 | } | |
1147 | if (qi->qi_gquotaip) { | |
26cc0021 | 1148 | IRELE(qi->qi_gquotaip); |
1da177e4 LT |
1149 | qi->qi_gquotaip = NULL; |
1150 | } | |
1151 | mutex_destroy(&qi->qi_quotaofflock); | |
f0e2d93c | 1152 | kmem_free(qi); |
1da177e4 LT |
1153 | mp->m_quotainfo = NULL; |
1154 | } | |
1155 | ||
1156 | ||
1157 | ||
1158 | /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */ | |
1159 | ||
1160 | /* ARGSUSED */ | |
1161 | STATIC void | |
1162 | xfs_qm_list_init( | |
1163 | xfs_dqlist_t *list, | |
1164 | char *str, | |
1165 | int n) | |
1166 | { | |
794ee1ba | 1167 | mutex_init(&list->qh_lock); |
1da177e4 LT |
1168 | list->qh_next = NULL; |
1169 | list->qh_version = 0; | |
1170 | list->qh_nelems = 0; | |
1171 | } | |
1172 | ||
1173 | STATIC void | |
1174 | xfs_qm_list_destroy( | |
1175 | xfs_dqlist_t *list) | |
1176 | { | |
1177 | mutex_destroy(&(list->qh_lock)); | |
1178 | } | |
1179 | ||
1180 | ||
1181 | /* | |
1182 | * Stripped down version of dqattach. This doesn't attach, or even look at the | |
1183 | * dquots attached to the inode. The rationale is that there won't be any | |
1184 | * attached at the time this is called from quotacheck. | |
1185 | */ | |
1186 | STATIC int | |
1187 | xfs_qm_dqget_noattach( | |
1188 | xfs_inode_t *ip, | |
1189 | xfs_dquot_t **O_udqpp, | |
1190 | xfs_dquot_t **O_gdqpp) | |
1191 | { | |
1192 | int error; | |
1193 | xfs_mount_t *mp; | |
1194 | xfs_dquot_t *udqp, *gdqp; | |
1195 | ||
579aa9ca | 1196 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
1197 | mp = ip->i_mount; |
1198 | udqp = NULL; | |
1199 | gdqp = NULL; | |
1200 | ||
1201 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1202 | ASSERT(ip->i_udquot == NULL); | |
1203 | /* | |
1204 | * We want the dquot allocated if it doesn't exist. | |
1205 | */ | |
1206 | if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER, | |
1207 | XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, | |
1208 | &udqp))) { | |
1209 | /* | |
1210 | * Shouldn't be able to turn off quotas here. | |
1211 | */ | |
1212 | ASSERT(error != ESRCH); | |
1213 | ASSERT(error != ENOENT); | |
014c2544 | 1214 | return error; |
1da177e4 LT |
1215 | } |
1216 | ASSERT(udqp); | |
1217 | } | |
1218 | ||
c8ad20ff | 1219 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1220 | ASSERT(ip->i_gdquot == NULL); |
1221 | if (udqp) | |
1222 | xfs_dqunlock(udqp); | |
c8ad20ff NS |
1223 | error = XFS_IS_GQUOTA_ON(mp) ? |
1224 | xfs_qm_dqget(mp, ip, | |
1225 | ip->i_d.di_gid, XFS_DQ_GROUP, | |
1226 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1227 | &gdqp) : | |
1228 | xfs_qm_dqget(mp, ip, | |
1229 | ip->i_d.di_projid, XFS_DQ_PROJ, | |
1230 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1231 | &gdqp); | |
1232 | if (error) { | |
1da177e4 LT |
1233 | if (udqp) |
1234 | xfs_qm_dqrele(udqp); | |
1235 | ASSERT(error != ESRCH); | |
1236 | ASSERT(error != ENOENT); | |
014c2544 | 1237 | return error; |
1da177e4 LT |
1238 | } |
1239 | ASSERT(gdqp); | |
1240 | ||
1241 | /* Reacquire the locks in the right order */ | |
1242 | if (udqp) { | |
1243 | if (! xfs_qm_dqlock_nowait(udqp)) { | |
1244 | xfs_dqunlock(gdqp); | |
1245 | xfs_dqlock(udqp); | |
1246 | xfs_dqlock(gdqp); | |
1247 | } | |
1248 | } | |
1249 | } | |
1250 | ||
1251 | *O_udqpp = udqp; | |
1252 | *O_gdqpp = gdqp; | |
1253 | ||
1254 | #ifdef QUOTADEBUG | |
1255 | if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp)); | |
1256 | if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp)); | |
1257 | #endif | |
014c2544 | 1258 | return 0; |
1da177e4 LT |
1259 | } |
1260 | ||
1261 | /* | |
1262 | * Create an inode and return with a reference already taken, but unlocked | |
1263 | * This is how we create quota inodes | |
1264 | */ | |
1265 | STATIC int | |
1266 | xfs_qm_qino_alloc( | |
1267 | xfs_mount_t *mp, | |
1268 | xfs_inode_t **ip, | |
1269 | __int64_t sbfields, | |
1270 | uint flags) | |
1271 | { | |
1272 | xfs_trans_t *tp; | |
1273 | int error; | |
1da177e4 LT |
1274 | int committed; |
1275 | ||
061f7209 | 1276 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE); |
1da177e4 LT |
1277 | if ((error = xfs_trans_reserve(tp, |
1278 | XFS_QM_QINOCREATE_SPACE_RES(mp), | |
1279 | XFS_CREATE_LOG_RES(mp), 0, | |
1280 | XFS_TRANS_PERM_LOG_RES, | |
1281 | XFS_CREATE_LOG_COUNT))) { | |
1282 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1283 | return error; |
1da177e4 | 1284 | } |
1da177e4 | 1285 | |
b11f94d5 | 1286 | if ((error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, |
dae81d47 | 1287 | &xfs_zerocr, 0, 1, ip, &committed))) { |
1da177e4 LT |
1288 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | |
1289 | XFS_TRANS_ABORT); | |
014c2544 | 1290 | return error; |
1da177e4 LT |
1291 | } |
1292 | ||
1293 | /* | |
1294 | * Keep an extra reference to this quota inode. This inode is | |
1295 | * locked exclusively and joined to the transaction already. | |
1296 | */ | |
579aa9ca | 1297 | ASSERT(xfs_isilocked(*ip, XFS_ILOCK_EXCL)); |
26cc0021 | 1298 | IHOLD(*ip); |
1da177e4 LT |
1299 | |
1300 | /* | |
1301 | * Make the changes in the superblock, and log those too. | |
1302 | * sbfields arg may contain fields other than *QUOTINO; | |
1303 | * VERSIONNUM for example. | |
1304 | */ | |
3685c2a1 | 1305 | spin_lock(&mp->m_sb_lock); |
1da177e4 LT |
1306 | if (flags & XFS_QMOPT_SBVERSION) { |
1307 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1308 | unsigned oldv = mp->m_sb.sb_versionnum; | |
1309 | #endif | |
62118709 | 1310 | ASSERT(!xfs_sb_version_hasquota(&mp->m_sb)); |
1da177e4 LT |
1311 | ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | |
1312 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) == | |
1313 | (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1314 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)); | |
1315 | ||
62118709 | 1316 | xfs_sb_version_addquota(&mp->m_sb); |
1da177e4 LT |
1317 | mp->m_sb.sb_uquotino = NULLFSINO; |
1318 | mp->m_sb.sb_gquotino = NULLFSINO; | |
1319 | ||
1320 | /* qflags will get updated _after_ quotacheck */ | |
1321 | mp->m_sb.sb_qflags = 0; | |
1322 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1323 | cmn_err(CE_NOTE, | |
1324 | "Old superblock version %x, converting to %x.", | |
1325 | oldv, mp->m_sb.sb_versionnum); | |
1326 | #endif | |
1327 | } | |
1328 | if (flags & XFS_QMOPT_UQUOTA) | |
1329 | mp->m_sb.sb_uquotino = (*ip)->i_ino; | |
1330 | else | |
1331 | mp->m_sb.sb_gquotino = (*ip)->i_ino; | |
3685c2a1 | 1332 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
1333 | xfs_mod_sb(tp, sbfields); |
1334 | ||
1c72bf90 | 1335 | if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) { |
1da177e4 | 1336 | xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!"); |
014c2544 | 1337 | return error; |
1da177e4 | 1338 | } |
014c2544 | 1339 | return 0; |
1da177e4 LT |
1340 | } |
1341 | ||
1342 | ||
5b139738 | 1343 | STATIC void |
1da177e4 LT |
1344 | xfs_qm_reset_dqcounts( |
1345 | xfs_mount_t *mp, | |
1346 | xfs_buf_t *bp, | |
1347 | xfs_dqid_t id, | |
1348 | uint type) | |
1349 | { | |
1350 | xfs_disk_dquot_t *ddq; | |
1351 | int j; | |
1352 | ||
1353 | xfs_buftrace("RESET DQUOTS", bp); | |
1354 | /* | |
1355 | * Reset all counters and timers. They'll be | |
1356 | * started afresh by xfs_qm_quotacheck. | |
1357 | */ | |
1358 | #ifdef DEBUG | |
1359 | j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1360 | do_div(j, sizeof(xfs_dqblk_t)); | |
1361 | ASSERT(XFS_QM_DQPERBLK(mp) == j); | |
1362 | #endif | |
1363 | ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp); | |
1364 | for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) { | |
1365 | /* | |
1366 | * Do a sanity check, and if needed, repair the dqblk. Don't | |
1367 | * output any warnings because it's perfectly possible to | |
c41564b5 | 1368 | * find uninitialised dquot blks. See comment in xfs_qm_dqcheck. |
1da177e4 LT |
1369 | */ |
1370 | (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR, | |
1371 | "xfs_quotacheck"); | |
1149d96a CH |
1372 | ddq->d_bcount = 0; |
1373 | ddq->d_icount = 0; | |
1374 | ddq->d_rtbcount = 0; | |
1375 | ddq->d_btimer = 0; | |
1376 | ddq->d_itimer = 0; | |
1377 | ddq->d_rtbtimer = 0; | |
1378 | ddq->d_bwarns = 0; | |
1379 | ddq->d_iwarns = 0; | |
1380 | ddq->d_rtbwarns = 0; | |
1da177e4 LT |
1381 | ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1); |
1382 | } | |
1da177e4 LT |
1383 | } |
1384 | ||
1385 | STATIC int | |
1386 | xfs_qm_dqiter_bufs( | |
1387 | xfs_mount_t *mp, | |
1388 | xfs_dqid_t firstid, | |
1389 | xfs_fsblock_t bno, | |
1390 | xfs_filblks_t blkcnt, | |
1391 | uint flags) | |
1392 | { | |
1393 | xfs_buf_t *bp; | |
1394 | int error; | |
1395 | int notcommitted; | |
1396 | int incr; | |
c8ad20ff | 1397 | int type; |
1da177e4 LT |
1398 | |
1399 | ASSERT(blkcnt > 0); | |
1400 | notcommitted = 0; | |
1401 | incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ? | |
1402 | XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt; | |
c8ad20ff NS |
1403 | type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER : |
1404 | (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP); | |
1da177e4 LT |
1405 | error = 0; |
1406 | ||
1407 | /* | |
1408 | * Blkcnt arg can be a very big number, and might even be | |
1409 | * larger than the log itself. So, we have to break it up into | |
1410 | * manageable-sized transactions. | |
1411 | * Note that we don't start a permanent transaction here; we might | |
1412 | * not be able to get a log reservation for the whole thing up front, | |
1413 | * and we don't really care to either, because we just discard | |
1414 | * everything if we were to crash in the middle of this loop. | |
1415 | */ | |
1416 | while (blkcnt--) { | |
1417 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, | |
1418 | XFS_FSB_TO_DADDR(mp, bno), | |
1419 | (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp); | |
1420 | if (error) | |
1421 | break; | |
1422 | ||
5b139738 | 1423 | xfs_qm_reset_dqcounts(mp, bp, firstid, type); |
1da177e4 LT |
1424 | xfs_bdwrite(mp, bp); |
1425 | /* | |
1426 | * goto the next block. | |
1427 | */ | |
1428 | bno++; | |
1429 | firstid += XFS_QM_DQPERBLK(mp); | |
1430 | } | |
014c2544 | 1431 | return error; |
1da177e4 LT |
1432 | } |
1433 | ||
1434 | /* | |
c8ad20ff | 1435 | * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a |
1da177e4 LT |
1436 | * caller supplied function for every chunk of dquots that we find. |
1437 | */ | |
1438 | STATIC int | |
1439 | xfs_qm_dqiterate( | |
1440 | xfs_mount_t *mp, | |
1441 | xfs_inode_t *qip, | |
1442 | uint flags) | |
1443 | { | |
1444 | xfs_bmbt_irec_t *map; | |
1445 | int i, nmaps; /* number of map entries */ | |
1446 | int error; /* return value */ | |
1447 | xfs_fileoff_t lblkno; | |
1448 | xfs_filblks_t maxlblkcnt; | |
1449 | xfs_dqid_t firstid; | |
1450 | xfs_fsblock_t rablkno; | |
1451 | xfs_filblks_t rablkcnt; | |
1452 | ||
1453 | error = 0; | |
1454 | /* | |
c41564b5 | 1455 | * This looks racy, but we can't keep an inode lock across a |
1da177e4 LT |
1456 | * trans_reserve. But, this gets called during quotacheck, and that |
1457 | * happens only at mount time which is single threaded. | |
1458 | */ | |
1459 | if (qip->i_d.di_nblocks == 0) | |
014c2544 | 1460 | return 0; |
1da177e4 LT |
1461 | |
1462 | map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP); | |
1463 | ||
1464 | lblkno = 0; | |
1465 | maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); | |
1466 | do { | |
1467 | nmaps = XFS_DQITER_MAP_SIZE; | |
1468 | /* | |
1469 | * We aren't changing the inode itself. Just changing | |
1470 | * some of its data. No new blocks are added here, and | |
1471 | * the inode is never added to the transaction. | |
1472 | */ | |
1473 | xfs_ilock(qip, XFS_ILOCK_SHARED); | |
1474 | error = xfs_bmapi(NULL, qip, lblkno, | |
1475 | maxlblkcnt - lblkno, | |
1476 | XFS_BMAPI_METADATA, | |
1477 | NULL, | |
3e57ecf6 | 1478 | 0, map, &nmaps, NULL, NULL); |
1da177e4 LT |
1479 | xfs_iunlock(qip, XFS_ILOCK_SHARED); |
1480 | if (error) | |
1481 | break; | |
1482 | ||
1483 | ASSERT(nmaps <= XFS_DQITER_MAP_SIZE); | |
1484 | for (i = 0; i < nmaps; i++) { | |
1485 | ASSERT(map[i].br_startblock != DELAYSTARTBLOCK); | |
1486 | ASSERT(map[i].br_blockcount); | |
1487 | ||
1488 | ||
1489 | lblkno += map[i].br_blockcount; | |
1490 | ||
1491 | if (map[i].br_startblock == HOLESTARTBLOCK) | |
1492 | continue; | |
1493 | ||
1494 | firstid = (xfs_dqid_t) map[i].br_startoff * | |
1495 | XFS_QM_DQPERBLK(mp); | |
1496 | /* | |
1497 | * Do a read-ahead on the next extent. | |
1498 | */ | |
1499 | if ((i+1 < nmaps) && | |
1500 | (map[i+1].br_startblock != HOLESTARTBLOCK)) { | |
1501 | rablkcnt = map[i+1].br_blockcount; | |
1502 | rablkno = map[i+1].br_startblock; | |
1503 | while (rablkcnt--) { | |
1504 | xfs_baread(mp->m_ddev_targp, | |
1505 | XFS_FSB_TO_DADDR(mp, rablkno), | |
1506 | (int)XFS_QI_DQCHUNKLEN(mp)); | |
1507 | rablkno++; | |
1508 | } | |
1509 | } | |
1510 | /* | |
1511 | * Iterate thru all the blks in the extent and | |
1512 | * reset the counters of all the dquots inside them. | |
1513 | */ | |
1514 | if ((error = xfs_qm_dqiter_bufs(mp, | |
1515 | firstid, | |
1516 | map[i].br_startblock, | |
1517 | map[i].br_blockcount, | |
1518 | flags))) { | |
1519 | break; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | if (error) | |
1524 | break; | |
1525 | } while (nmaps > 0); | |
1526 | ||
f0e2d93c | 1527 | kmem_free(map); |
1da177e4 | 1528 | |
014c2544 | 1529 | return error; |
1da177e4 LT |
1530 | } |
1531 | ||
1532 | /* | |
1533 | * Called by dqusage_adjust in doing a quotacheck. | |
1534 | * Given the inode, and a dquot (either USR or GRP, doesn't matter), | |
1535 | * this updates its incore copy as well as the buffer copy. This is | |
1536 | * so that once the quotacheck is done, we can just log all the buffers, | |
1537 | * as opposed to logging numerous updates to individual dquots. | |
1538 | */ | |
1539 | STATIC void | |
1540 | xfs_qm_quotacheck_dqadjust( | |
1541 | xfs_dquot_t *dqp, | |
1542 | xfs_qcnt_t nblks, | |
1543 | xfs_qcnt_t rtblks) | |
1544 | { | |
1545 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
1546 | xfs_dqtrace_entry(dqp, "QCHECK DQADJUST"); | |
1547 | /* | |
1548 | * Adjust the inode count and the block count to reflect this inode's | |
1549 | * resource usage. | |
1550 | */ | |
413d57c9 | 1551 | be64_add_cpu(&dqp->q_core.d_icount, 1); |
1da177e4 LT |
1552 | dqp->q_res_icount++; |
1553 | if (nblks) { | |
413d57c9 | 1554 | be64_add_cpu(&dqp->q_core.d_bcount, nblks); |
1da177e4 LT |
1555 | dqp->q_res_bcount += nblks; |
1556 | } | |
1557 | if (rtblks) { | |
413d57c9 | 1558 | be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks); |
1da177e4 LT |
1559 | dqp->q_res_rtbcount += rtblks; |
1560 | } | |
1561 | ||
1562 | /* | |
1563 | * Set default limits, adjust timers (since we changed usages) | |
1564 | */ | |
1565 | if (! XFS_IS_SUSER_DQUOT(dqp)) { | |
1566 | xfs_qm_adjust_dqlimits(dqp->q_mount, &dqp->q_core); | |
1567 | xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core); | |
1568 | } | |
1569 | ||
1570 | dqp->dq_flags |= XFS_DQ_DIRTY; | |
1571 | } | |
1572 | ||
1573 | STATIC int | |
1574 | xfs_qm_get_rtblks( | |
1575 | xfs_inode_t *ip, | |
1576 | xfs_qcnt_t *O_rtblks) | |
1577 | { | |
1578 | xfs_filblks_t rtblks; /* total rt blks */ | |
4eea22f0 | 1579 | xfs_extnum_t idx; /* extent record index */ |
1da177e4 LT |
1580 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1581 | xfs_extnum_t nextents; /* number of extent entries */ | |
1da177e4 LT |
1582 | int error; |
1583 | ||
1584 | ASSERT(XFS_IS_REALTIME_INODE(ip)); | |
1585 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
1586 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1587 | if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK))) | |
014c2544 | 1588 | return error; |
1da177e4 LT |
1589 | } |
1590 | rtblks = 0; | |
4eea22f0 | 1591 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
a6f64d4a CH |
1592 | for (idx = 0; idx < nextents; idx++) |
1593 | rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx)); | |
1da177e4 | 1594 | *O_rtblks = (xfs_qcnt_t)rtblks; |
014c2544 | 1595 | return 0; |
1da177e4 LT |
1596 | } |
1597 | ||
1598 | /* | |
1599 | * callback routine supplied to bulkstat(). Given an inumber, find its | |
1600 | * dquots and update them to account for resources taken by that inode. | |
1601 | */ | |
1602 | /* ARGSUSED */ | |
1603 | STATIC int | |
1604 | xfs_qm_dqusage_adjust( | |
1605 | xfs_mount_t *mp, /* mount point for filesystem */ | |
1606 | xfs_ino_t ino, /* inode number to get data for */ | |
1607 | void __user *buffer, /* not used */ | |
1608 | int ubsize, /* not used */ | |
1609 | void *private_data, /* not used */ | |
1610 | xfs_daddr_t bno, /* starting block of inode cluster */ | |
1611 | int *ubused, /* not used */ | |
1612 | void *dip, /* on-disk inode pointer (not used) */ | |
1613 | int *res) /* result code value */ | |
1614 | { | |
1615 | xfs_inode_t *ip; | |
1616 | xfs_dquot_t *udqp, *gdqp; | |
1617 | xfs_qcnt_t nblks, rtblks; | |
1618 | int error; | |
1619 | ||
1620 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1621 | ||
1622 | /* | |
1623 | * rootino must have its resources accounted for, not so with the quota | |
1624 | * inodes. | |
1625 | */ | |
1626 | if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) { | |
1627 | *res = BULKSTAT_RV_NOTHING; | |
1628 | return XFS_ERROR(EINVAL); | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget | |
1633 | * interface expects the inode to be exclusively locked because that's | |
1634 | * the case in all other instances. It's OK that we do this because | |
1635 | * quotacheck is done only at mount time. | |
1636 | */ | |
1637 | if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) { | |
1638 | *res = BULKSTAT_RV_NOTHING; | |
014c2544 | 1639 | return error; |
1da177e4 LT |
1640 | } |
1641 | ||
1da177e4 LT |
1642 | /* |
1643 | * Obtain the locked dquots. In case of an error (eg. allocation | |
1644 | * fails for ENOSPC), we return the negative of the error number | |
1645 | * to bulkstat, so that it can get propagated to quotacheck() and | |
1646 | * making us disable quotas for the file system. | |
1647 | */ | |
1648 | if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) { | |
1649 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1650 | *res = BULKSTAT_RV_GIVEUP; | |
014c2544 | 1651 | return error; |
1da177e4 LT |
1652 | } |
1653 | ||
1654 | rtblks = 0; | |
1655 | if (! XFS_IS_REALTIME_INODE(ip)) { | |
1656 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks; | |
1657 | } else { | |
1658 | /* | |
1659 | * Walk thru the extent list and count the realtime blocks. | |
1660 | */ | |
1661 | if ((error = xfs_qm_get_rtblks(ip, &rtblks))) { | |
1662 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1663 | if (udqp) | |
1664 | xfs_qm_dqput(udqp); | |
1665 | if (gdqp) | |
1666 | xfs_qm_dqput(gdqp); | |
1667 | *res = BULKSTAT_RV_GIVEUP; | |
014c2544 | 1668 | return error; |
1da177e4 LT |
1669 | } |
1670 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks; | |
1671 | } | |
1672 | ASSERT(ip->i_delayed_blks == 0); | |
1673 | ||
1674 | /* | |
1675 | * We can't release the inode while holding its dquot locks. | |
1676 | * The inode can go into inactive and might try to acquire the dquotlocks. | |
1677 | * So, just unlock here and do a vn_rele at the end. | |
1678 | */ | |
1679 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1680 | ||
1681 | /* | |
1682 | * Add the (disk blocks and inode) resources occupied by this | |
1683 | * inode to its dquots. We do this adjustment in the incore dquot, | |
1684 | * and also copy the changes to its buffer. | |
1685 | * We don't care about putting these changes in a transaction | |
1686 | * envelope because if we crash in the middle of a 'quotacheck' | |
1687 | * we have to start from the beginning anyway. | |
1688 | * Once we're done, we'll log all the dquot bufs. | |
1689 | * | |
c41564b5 | 1690 | * The *QUOTA_ON checks below may look pretty racy, but quotachecks |
1da177e4 LT |
1691 | * and quotaoffs don't race. (Quotachecks happen at mount time only). |
1692 | */ | |
1693 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1694 | ASSERT(udqp); | |
1695 | xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks); | |
1696 | xfs_qm_dqput(udqp); | |
1697 | } | |
c8ad20ff | 1698 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1699 | ASSERT(gdqp); |
1700 | xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks); | |
1701 | xfs_qm_dqput(gdqp); | |
1702 | } | |
1703 | /* | |
1704 | * Now release the inode. This will send it to 'inactive', and | |
1705 | * possibly even free blocks. | |
1706 | */ | |
43355099 | 1707 | IRELE(ip); |
1da177e4 LT |
1708 | |
1709 | /* | |
1710 | * Goto next inode. | |
1711 | */ | |
1712 | *res = BULKSTAT_RV_DIDONE; | |
014c2544 | 1713 | return 0; |
1da177e4 LT |
1714 | } |
1715 | ||
1716 | /* | |
1717 | * Walk thru all the filesystem inodes and construct a consistent view | |
1718 | * of the disk quota world. If the quotacheck fails, disable quotas. | |
1719 | */ | |
1720 | int | |
1721 | xfs_qm_quotacheck( | |
1722 | xfs_mount_t *mp) | |
1723 | { | |
1724 | int done, count, error; | |
1725 | xfs_ino_t lastino; | |
1726 | size_t structsz; | |
1727 | xfs_inode_t *uip, *gip; | |
1728 | uint flags; | |
1729 | ||
1730 | count = INT_MAX; | |
1731 | structsz = 1; | |
1732 | lastino = 0; | |
1733 | flags = 0; | |
1734 | ||
1735 | ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp)); | |
1736 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1737 | ||
1738 | /* | |
1739 | * There should be no cached dquots. The (simplistic) quotacheck | |
1740 | * algorithm doesn't like that. | |
1741 | */ | |
1742 | ASSERT(XFS_QI_MPLNDQUOTS(mp) == 0); | |
1743 | ||
1744 | cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname); | |
1745 | ||
1746 | /* | |
c8ad20ff | 1747 | * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset |
1da177e4 LT |
1748 | * their counters to zero. We need a clean slate. |
1749 | * We don't log our changes till later. | |
1750 | */ | |
1751 | if ((uip = XFS_QI_UQIP(mp))) { | |
1752 | if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA))) | |
1753 | goto error_return; | |
1754 | flags |= XFS_UQUOTA_CHKD; | |
1755 | } | |
1756 | ||
1757 | if ((gip = XFS_QI_GQIP(mp))) { | |
c8ad20ff NS |
1758 | if ((error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ? |
1759 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA))) | |
1da177e4 | 1760 | goto error_return; |
c8ad20ff | 1761 | flags |= XFS_OQUOTA_CHKD; |
1da177e4 LT |
1762 | } |
1763 | ||
1764 | do { | |
1765 | /* | |
1766 | * Iterate thru all the inodes in the file system, | |
1767 | * adjusting the corresponding dquot counters in core. | |
1768 | */ | |
1769 | if ((error = xfs_bulkstat(mp, &lastino, &count, | |
1770 | xfs_qm_dqusage_adjust, NULL, | |
9c48876a | 1771 | structsz, NULL, BULKSTAT_FG_IGET, &done))) |
1da177e4 LT |
1772 | break; |
1773 | ||
1774 | } while (! done); | |
1775 | ||
4b8879df DC |
1776 | /* |
1777 | * We've made all the changes that we need to make incore. | |
1778 | * Flush them down to disk buffers if everything was updated | |
1779 | * successfully. | |
1780 | */ | |
1781 | if (!error) | |
1782 | error = xfs_qm_dqflush_all(mp, XFS_QMOPT_DELWRI); | |
1783 | ||
1da177e4 LT |
1784 | /* |
1785 | * We can get this error if we couldn't do a dquot allocation inside | |
1786 | * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the | |
1787 | * dirty dquots that might be cached, we just want to get rid of them | |
1788 | * and turn quotaoff. The dquots won't be attached to any of the inodes | |
1789 | * at this point (because we intentionally didn't in dqget_noattach). | |
1790 | */ | |
1791 | if (error) { | |
ee2a4f7c | 1792 | xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_QUOTAOFF); |
1da177e4 LT |
1793 | goto error_return; |
1794 | } | |
1da177e4 LT |
1795 | |
1796 | /* | |
1797 | * We didn't log anything, because if we crashed, we'll have to | |
1798 | * start the quotacheck from scratch anyway. However, we must make | |
1799 | * sure that our dquot changes are secure before we put the | |
1800 | * quotacheck'd stamp on the superblock. So, here we do a synchronous | |
1801 | * flush. | |
1802 | */ | |
1803 | XFS_bflush(mp->m_ddev_targp); | |
1804 | ||
1805 | /* | |
1806 | * If one type of quotas is off, then it will lose its | |
1807 | * quotachecked status, since we won't be doing accounting for | |
1808 | * that type anymore. | |
1809 | */ | |
c8ad20ff | 1810 | mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD); |
1da177e4 LT |
1811 | mp->m_qflags |= flags; |
1812 | ||
1813 | XQM_LIST_PRINT(&(XFS_QI_MPL_LIST(mp)), MPL_NEXT, "++++ Mp list +++"); | |
1814 | ||
1815 | error_return: | |
1816 | if (error) { | |
1817 | cmn_err(CE_WARN, "XFS quotacheck %s: Unsuccessful (Error %d): " | |
1818 | "Disabling quotas.", | |
1819 | mp->m_fsname, error); | |
1820 | /* | |
1821 | * We must turn off quotas. | |
1822 | */ | |
1823 | ASSERT(mp->m_quotainfo != NULL); | |
1824 | ASSERT(xfs_Gqm != NULL); | |
1825 | xfs_qm_destroy_quotainfo(mp); | |
31d5577b DC |
1826 | if (xfs_mount_reset_sbqflags(mp)) { |
1827 | cmn_err(CE_WARN, "XFS quotacheck %s: " | |
1828 | "Failed to reset quota flags.", mp->m_fsname); | |
1829 | } | |
1da177e4 LT |
1830 | } else { |
1831 | cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname); | |
1832 | } | |
1833 | return (error); | |
1834 | } | |
1835 | ||
1836 | /* | |
1837 | * This is called after the superblock has been read in and we're ready to | |
1838 | * iget the quota inodes. | |
1839 | */ | |
1840 | STATIC int | |
1841 | xfs_qm_init_quotainos( | |
1842 | xfs_mount_t *mp) | |
1843 | { | |
1844 | xfs_inode_t *uip, *gip; | |
1845 | int error; | |
1846 | __int64_t sbflags; | |
1847 | uint flags; | |
1848 | ||
1849 | ASSERT(mp->m_quotainfo); | |
1850 | uip = gip = NULL; | |
1851 | sbflags = 0; | |
1852 | flags = 0; | |
1853 | ||
1854 | /* | |
1855 | * Get the uquota and gquota inodes | |
1856 | */ | |
62118709 | 1857 | if (xfs_sb_version_hasquota(&mp->m_sb)) { |
1da177e4 LT |
1858 | if (XFS_IS_UQUOTA_ON(mp) && |
1859 | mp->m_sb.sb_uquotino != NULLFSINO) { | |
1860 | ASSERT(mp->m_sb.sb_uquotino > 0); | |
1861 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, | |
1862 | 0, 0, &uip, 0))) | |
1863 | return XFS_ERROR(error); | |
1864 | } | |
c8ad20ff | 1865 | if (XFS_IS_OQUOTA_ON(mp) && |
1da177e4 LT |
1866 | mp->m_sb.sb_gquotino != NULLFSINO) { |
1867 | ASSERT(mp->m_sb.sb_gquotino > 0); | |
1868 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, | |
1869 | 0, 0, &gip, 0))) { | |
1870 | if (uip) | |
43355099 | 1871 | IRELE(uip); |
1da177e4 LT |
1872 | return XFS_ERROR(error); |
1873 | } | |
1874 | } | |
1875 | } else { | |
1876 | flags |= XFS_QMOPT_SBVERSION; | |
1877 | sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1878 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS); | |
1879 | } | |
1880 | ||
1881 | /* | |
1882 | * Create the two inodes, if they don't exist already. The changes | |
1883 | * made above will get added to a transaction and logged in one of | |
1884 | * the qino_alloc calls below. If the device is readonly, | |
1885 | * temporarily switch to read-write to do this. | |
1886 | */ | |
1887 | if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) { | |
1888 | if ((error = xfs_qm_qino_alloc(mp, &uip, | |
1889 | sbflags | XFS_SB_UQUOTINO, | |
1890 | flags | XFS_QMOPT_UQUOTA))) | |
1891 | return XFS_ERROR(error); | |
1892 | ||
1893 | flags &= ~XFS_QMOPT_SBVERSION; | |
1894 | } | |
c8ad20ff NS |
1895 | if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) { |
1896 | flags |= (XFS_IS_GQUOTA_ON(mp) ? | |
1897 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA); | |
1898 | error = xfs_qm_qino_alloc(mp, &gip, | |
1899 | sbflags | XFS_SB_GQUOTINO, flags); | |
1900 | if (error) { | |
1da177e4 | 1901 | if (uip) |
43355099 | 1902 | IRELE(uip); |
1da177e4 LT |
1903 | |
1904 | return XFS_ERROR(error); | |
1905 | } | |
1906 | } | |
1907 | ||
1908 | XFS_QI_UQIP(mp) = uip; | |
1909 | XFS_QI_GQIP(mp) = gip; | |
1910 | ||
014c2544 | 1911 | return 0; |
1da177e4 LT |
1912 | } |
1913 | ||
1914 | ||
1915 | /* | |
1916 | * Traverse the freelist of dquots and attempt to reclaim a maximum of | |
1917 | * 'howmany' dquots. This operation races with dqlookup(), and attempts to | |
1918 | * favor the lookup function ... | |
1919 | * XXXsup merge this with qm_reclaim_one(). | |
1920 | */ | |
1921 | STATIC int | |
1922 | xfs_qm_shake_freelist( | |
1923 | int howmany) | |
1924 | { | |
1925 | int nreclaimed; | |
1926 | xfs_dqhash_t *hash; | |
1927 | xfs_dquot_t *dqp, *nextdqp; | |
1928 | int restarts; | |
1929 | int nflushes; | |
1930 | ||
1931 | if (howmany <= 0) | |
014c2544 | 1932 | return 0; |
1da177e4 LT |
1933 | |
1934 | nreclaimed = 0; | |
1935 | restarts = 0; | |
1936 | nflushes = 0; | |
1937 | ||
1938 | #ifdef QUOTADEBUG | |
1939 | cmn_err(CE_DEBUG, "Shake free 0x%x", howmany); | |
1940 | #endif | |
1941 | /* lock order is : hashchainlock, freelistlock, mplistlock */ | |
1942 | tryagain: | |
1943 | xfs_qm_freelist_lock(xfs_Gqm); | |
1944 | ||
1945 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
1946 | ((dqp != (xfs_dquot_t *) &xfs_Gqm->qm_dqfreelist) && | |
1947 | nreclaimed < howmany); ) { | |
1948 | xfs_dqlock(dqp); | |
1949 | ||
1950 | /* | |
1951 | * We are racing with dqlookup here. Naturally we don't | |
1952 | * want to reclaim a dquot that lookup wants. | |
1953 | */ | |
1954 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
1955 | xfs_dqunlock(dqp); | |
1956 | xfs_qm_freelist_unlock(xfs_Gqm); | |
1957 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 1958 | return nreclaimed; |
1da177e4 LT |
1959 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); |
1960 | goto tryagain; | |
1961 | } | |
1962 | ||
1963 | /* | |
1964 | * If the dquot is inactive, we are assured that it is | |
1965 | * not on the mplist or the hashlist, and that makes our | |
1966 | * life easier. | |
1967 | */ | |
1968 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
1969 | ASSERT(dqp->q_mount == NULL); | |
1970 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
1971 | ASSERT(dqp->HL_PREVP == NULL); | |
1972 | ASSERT(dqp->MPL_PREVP == NULL); | |
1973 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); | |
1974 | nextdqp = dqp->dq_flnext; | |
1975 | goto off_freelist; | |
1976 | } | |
1977 | ||
1978 | ASSERT(dqp->MPL_PREVP); | |
1979 | /* | |
1980 | * Try to grab the flush lock. If this dquot is in the process of | |
1981 | * getting flushed to disk, we don't want to reclaim it. | |
1982 | */ | |
e1f49cf2 | 1983 | if (!xfs_dqflock_nowait(dqp)) { |
1da177e4 LT |
1984 | xfs_dqunlock(dqp); |
1985 | dqp = dqp->dq_flnext; | |
1986 | continue; | |
1987 | } | |
1988 | ||
1989 | /* | |
1990 | * We have the flush lock so we know that this is not in the | |
1991 | * process of being flushed. So, if this is dirty, flush it | |
1992 | * DELWRI so that we don't get a freelist infested with | |
1993 | * dirty dquots. | |
1994 | */ | |
1995 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
3c56836f | 1996 | int error; |
1da177e4 LT |
1997 | xfs_dqtrace_entry(dqp, "DQSHAKE: DQDIRTY"); |
1998 | /* | |
1999 | * We flush it delayed write, so don't bother | |
2000 | * releasing the mplock. | |
2001 | */ | |
3c56836f DC |
2002 | error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); |
2003 | if (error) { | |
2004 | xfs_fs_cmn_err(CE_WARN, dqp->q_mount, | |
2005 | "xfs_qm_dqflush_all: dquot %p flush failed", dqp); | |
2006 | } | |
1da177e4 LT |
2007 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ |
2008 | dqp = dqp->dq_flnext; | |
2009 | continue; | |
2010 | } | |
2011 | /* | |
2012 | * We're trying to get the hashlock out of order. This races | |
2013 | * with dqlookup; so, we giveup and goto the next dquot if | |
2014 | * we couldn't get the hashlock. This way, we won't starve | |
2015 | * a dqlookup process that holds the hashlock that is | |
2016 | * waiting for the freelist lock. | |
2017 | */ | |
c9a192dc | 2018 | if (!mutex_trylock(&dqp->q_hash->qh_lock)) { |
1da177e4 LT |
2019 | xfs_dqfunlock(dqp); |
2020 | xfs_dqunlock(dqp); | |
2021 | dqp = dqp->dq_flnext; | |
2022 | continue; | |
2023 | } | |
2024 | /* | |
2025 | * This races with dquot allocation code as well as dqflush_all | |
2026 | * and reclaim code. So, if we failed to grab the mplist lock, | |
2027 | * giveup everything and start over. | |
2028 | */ | |
2029 | hash = dqp->q_hash; | |
2030 | ASSERT(hash); | |
2031 | if (! xfs_qm_mplist_nowait(dqp->q_mount)) { | |
2032 | /* XXX put a sentinel so that we can come back here */ | |
2033 | xfs_dqfunlock(dqp); | |
2034 | xfs_dqunlock(dqp); | |
c9a192dc | 2035 | mutex_unlock(&hash->qh_lock); |
1da177e4 LT |
2036 | xfs_qm_freelist_unlock(xfs_Gqm); |
2037 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 2038 | return nreclaimed; |
1da177e4 LT |
2039 | goto tryagain; |
2040 | } | |
2041 | xfs_dqtrace_entry(dqp, "DQSHAKE: UNLINKING"); | |
2042 | #ifdef QUOTADEBUG | |
2043 | cmn_err(CE_DEBUG, "Shake 0x%p, ID 0x%x\n", | |
1149d96a | 2044 | dqp, be32_to_cpu(dqp->q_core.d_id)); |
1da177e4 LT |
2045 | #endif |
2046 | ASSERT(dqp->q_nrefs == 0); | |
2047 | nextdqp = dqp->dq_flnext; | |
2048 | XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp); | |
2049 | XQM_HASHLIST_REMOVE(hash, dqp); | |
2050 | xfs_dqfunlock(dqp); | |
2051 | xfs_qm_mplist_unlock(dqp->q_mount); | |
c9a192dc | 2052 | mutex_unlock(&hash->qh_lock); |
1da177e4 LT |
2053 | |
2054 | off_freelist: | |
2055 | XQM_FREELIST_REMOVE(dqp); | |
2056 | xfs_dqunlock(dqp); | |
2057 | nreclaimed++; | |
2058 | XQM_STATS_INC(xqmstats.xs_qm_dqshake_reclaims); | |
2059 | xfs_qm_dqdestroy(dqp); | |
2060 | dqp = nextdqp; | |
2061 | } | |
2062 | xfs_qm_freelist_unlock(xfs_Gqm); | |
014c2544 | 2063 | return nreclaimed; |
1da177e4 LT |
2064 | } |
2065 | ||
2066 | ||
2067 | /* | |
2068 | * The kmem_shake interface is invoked when memory is running low. | |
2069 | */ | |
2070 | /* ARGSUSED */ | |
2071 | STATIC int | |
51bfb75b | 2072 | xfs_qm_shake(int nr_to_scan, gfp_t gfp_mask) |
1da177e4 LT |
2073 | { |
2074 | int ndqused, nfree, n; | |
2075 | ||
2076 | if (!kmem_shake_allow(gfp_mask)) | |
014c2544 | 2077 | return 0; |
1da177e4 | 2078 | if (!xfs_Gqm) |
014c2544 | 2079 | return 0; |
1da177e4 LT |
2080 | |
2081 | nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */ | |
2082 | /* incore dquots in all f/s's */ | |
2083 | ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree; | |
2084 | ||
2085 | ASSERT(ndqused >= 0); | |
2086 | ||
2087 | if (nfree <= ndqused && nfree < ndquot) | |
014c2544 | 2088 | return 0; |
1da177e4 LT |
2089 | |
2090 | ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */ | |
2091 | n = nfree - ndqused - ndquot; /* # over target */ | |
2092 | ||
2093 | return xfs_qm_shake_freelist(MAX(nfree, n)); | |
2094 | } | |
2095 | ||
2096 | ||
2097 | /* | |
2098 | * Just pop the least recently used dquot off the freelist and | |
2099 | * recycle it. The returned dquot is locked. | |
2100 | */ | |
2101 | STATIC xfs_dquot_t * | |
2102 | xfs_qm_dqreclaim_one(void) | |
2103 | { | |
2104 | xfs_dquot_t *dqpout; | |
2105 | xfs_dquot_t *dqp; | |
2106 | int restarts; | |
2107 | int nflushes; | |
2108 | ||
2109 | restarts = 0; | |
2110 | dqpout = NULL; | |
2111 | nflushes = 0; | |
2112 | ||
2113 | /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */ | |
2114 | startagain: | |
2115 | xfs_qm_freelist_lock(xfs_Gqm); | |
2116 | ||
2117 | FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) { | |
2118 | xfs_dqlock(dqp); | |
2119 | ||
2120 | /* | |
2121 | * We are racing with dqlookup here. Naturally we don't | |
2122 | * want to reclaim a dquot that lookup wants. We release the | |
2123 | * freelist lock and start over, so that lookup will grab | |
2124 | * both the dquot and the freelistlock. | |
2125 | */ | |
2126 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
2127 | ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE)); | |
2128 | xfs_dqtrace_entry(dqp, "DQRECLAIM: DQWANT"); | |
2129 | xfs_dqunlock(dqp); | |
2130 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2131 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 2132 | return NULL; |
1da177e4 LT |
2133 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); |
2134 | goto startagain; | |
2135 | } | |
2136 | ||
2137 | /* | |
2138 | * If the dquot is inactive, we are assured that it is | |
2139 | * not on the mplist or the hashlist, and that makes our | |
2140 | * life easier. | |
2141 | */ | |
2142 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
2143 | ASSERT(dqp->q_mount == NULL); | |
2144 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
2145 | ASSERT(dqp->HL_PREVP == NULL); | |
2146 | ASSERT(dqp->MPL_PREVP == NULL); | |
2147 | XQM_FREELIST_REMOVE(dqp); | |
2148 | xfs_dqunlock(dqp); | |
2149 | dqpout = dqp; | |
2150 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); | |
2151 | break; | |
2152 | } | |
2153 | ||
2154 | ASSERT(dqp->q_hash); | |
2155 | ASSERT(dqp->MPL_PREVP); | |
2156 | ||
2157 | /* | |
2158 | * Try to grab the flush lock. If this dquot is in the process of | |
2159 | * getting flushed to disk, we don't want to reclaim it. | |
2160 | */ | |
e1f49cf2 | 2161 | if (!xfs_dqflock_nowait(dqp)) { |
1da177e4 LT |
2162 | xfs_dqunlock(dqp); |
2163 | continue; | |
2164 | } | |
2165 | ||
2166 | /* | |
2167 | * We have the flush lock so we know that this is not in the | |
2168 | * process of being flushed. So, if this is dirty, flush it | |
2169 | * DELWRI so that we don't get a freelist infested with | |
2170 | * dirty dquots. | |
2171 | */ | |
2172 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
3c56836f | 2173 | int error; |
1da177e4 LT |
2174 | xfs_dqtrace_entry(dqp, "DQRECLAIM: DQDIRTY"); |
2175 | /* | |
2176 | * We flush it delayed write, so don't bother | |
2177 | * releasing the freelist lock. | |
2178 | */ | |
3c56836f DC |
2179 | error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); |
2180 | if (error) { | |
2181 | xfs_fs_cmn_err(CE_WARN, dqp->q_mount, | |
2182 | "xfs_qm_dqreclaim: dquot %p flush failed", dqp); | |
2183 | } | |
1da177e4 LT |
2184 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ |
2185 | continue; | |
2186 | } | |
2187 | ||
2188 | if (! xfs_qm_mplist_nowait(dqp->q_mount)) { | |
2189 | xfs_dqfunlock(dqp); | |
2190 | xfs_dqunlock(dqp); | |
2191 | continue; | |
2192 | } | |
2193 | ||
c9a192dc | 2194 | if (!mutex_trylock(&dqp->q_hash->qh_lock)) |
1da177e4 LT |
2195 | goto mplistunlock; |
2196 | ||
2197 | ASSERT(dqp->q_nrefs == 0); | |
2198 | xfs_dqtrace_entry(dqp, "DQRECLAIM: UNLINKING"); | |
2199 | XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp); | |
2200 | XQM_HASHLIST_REMOVE(dqp->q_hash, dqp); | |
2201 | XQM_FREELIST_REMOVE(dqp); | |
2202 | dqpout = dqp; | |
c9a192dc | 2203 | mutex_unlock(&dqp->q_hash->qh_lock); |
1da177e4 LT |
2204 | mplistunlock: |
2205 | xfs_qm_mplist_unlock(dqp->q_mount); | |
2206 | xfs_dqfunlock(dqp); | |
2207 | xfs_dqunlock(dqp); | |
2208 | if (dqpout) | |
2209 | break; | |
2210 | } | |
2211 | ||
2212 | xfs_qm_freelist_unlock(xfs_Gqm); | |
014c2544 | 2213 | return dqpout; |
1da177e4 LT |
2214 | } |
2215 | ||
2216 | ||
2217 | /*------------------------------------------------------------------*/ | |
2218 | ||
2219 | /* | |
2220 | * Return a new incore dquot. Depending on the number of | |
2221 | * dquots in the system, we either allocate a new one on the kernel heap, | |
2222 | * or reclaim a free one. | |
2223 | * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed | |
2224 | * to reclaim an existing one from the freelist. | |
2225 | */ | |
2226 | boolean_t | |
2227 | xfs_qm_dqalloc_incore( | |
2228 | xfs_dquot_t **O_dqpp) | |
2229 | { | |
2230 | xfs_dquot_t *dqp; | |
2231 | ||
2232 | /* | |
2233 | * Check against high water mark to see if we want to pop | |
2234 | * a nincompoop dquot off the freelist. | |
2235 | */ | |
2236 | if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) { | |
2237 | /* | |
2238 | * Try to recycle a dquot from the freelist. | |
2239 | */ | |
2240 | if ((dqp = xfs_qm_dqreclaim_one())) { | |
2241 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaims); | |
2242 | /* | |
2243 | * Just zero the core here. The rest will get | |
2244 | * reinitialized by caller. XXX we shouldn't even | |
2245 | * do this zero ... | |
2246 | */ | |
2247 | memset(&dqp->q_core, 0, sizeof(dqp->q_core)); | |
2248 | *O_dqpp = dqp; | |
014c2544 | 2249 | return B_FALSE; |
1da177e4 LT |
2250 | } |
2251 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses); | |
2252 | } | |
2253 | ||
2254 | /* | |
2255 | * Allocate a brand new dquot on the kernel heap and return it | |
2256 | * to the caller to initialize. | |
2257 | */ | |
2258 | ASSERT(xfs_Gqm->qm_dqzone != NULL); | |
2259 | *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP); | |
2260 | atomic_inc(&xfs_Gqm->qm_totaldquots); | |
2261 | ||
014c2544 | 2262 | return B_TRUE; |
1da177e4 LT |
2263 | } |
2264 | ||
2265 | ||
2266 | /* | |
2267 | * Start a transaction and write the incore superblock changes to | |
2268 | * disk. flags parameter indicates which fields have changed. | |
2269 | */ | |
2270 | int | |
2271 | xfs_qm_write_sb_changes( | |
2272 | xfs_mount_t *mp, | |
2273 | __int64_t flags) | |
2274 | { | |
2275 | xfs_trans_t *tp; | |
2276 | int error; | |
2277 | ||
2278 | #ifdef QUOTADEBUG | |
2279 | cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname); | |
2280 | #endif | |
2281 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE); | |
2282 | if ((error = xfs_trans_reserve(tp, 0, | |
2283 | mp->m_sb.sb_sectsize + 128, 0, | |
2284 | 0, | |
2285 | XFS_DEFAULT_LOG_COUNT))) { | |
2286 | xfs_trans_cancel(tp, 0); | |
014c2544 | 2287 | return error; |
1da177e4 LT |
2288 | } |
2289 | ||
2290 | xfs_mod_sb(tp, flags); | |
e5720eec | 2291 | error = xfs_trans_commit(tp, 0); |
1da177e4 | 2292 | |
e5720eec | 2293 | return error; |
1da177e4 LT |
2294 | } |
2295 | ||
2296 | ||
2297 | /* --------------- utility functions for vnodeops ---------------- */ | |
2298 | ||
2299 | ||
2300 | /* | |
2301 | * Given an inode, a uid and gid (from cred_t) make sure that we have | |
2302 | * allocated relevant dquot(s) on disk, and that we won't exceed inode | |
2303 | * quotas by creating this file. | |
2304 | * This also attaches dquot(s) to the given inode after locking it, | |
2305 | * and returns the dquots corresponding to the uid and/or gid. | |
2306 | * | |
2307 | * in : inode (unlocked) | |
2308 | * out : udquot, gdquot with references taken and unlocked | |
2309 | */ | |
2310 | int | |
2311 | xfs_qm_vop_dqalloc( | |
7d095257 CH |
2312 | struct xfs_inode *ip, |
2313 | uid_t uid, | |
2314 | gid_t gid, | |
2315 | prid_t prid, | |
2316 | uint flags, | |
2317 | struct xfs_dquot **O_udqpp, | |
2318 | struct xfs_dquot **O_gdqpp) | |
1da177e4 | 2319 | { |
7d095257 CH |
2320 | struct xfs_mount *mp = ip->i_mount; |
2321 | struct xfs_dquot *uq, *gq; | |
2322 | int error; | |
2323 | uint lockflags; | |
1da177e4 | 2324 | |
7d095257 | 2325 | if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) |
1da177e4 LT |
2326 | return 0; |
2327 | ||
2328 | lockflags = XFS_ILOCK_EXCL; | |
2329 | xfs_ilock(ip, lockflags); | |
2330 | ||
bd186aa9 | 2331 | if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip)) |
1da177e4 LT |
2332 | gid = ip->i_d.di_gid; |
2333 | ||
2334 | /* | |
2335 | * Attach the dquot(s) to this inode, doing a dquot allocation | |
2336 | * if necessary. The dquot(s) will not be locked. | |
2337 | */ | |
2338 | if (XFS_NOT_DQATTACHED(mp, ip)) { | |
7d095257 CH |
2339 | error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC); |
2340 | if (error) { | |
1da177e4 | 2341 | xfs_iunlock(ip, lockflags); |
014c2544 | 2342 | return error; |
1da177e4 LT |
2343 | } |
2344 | } | |
2345 | ||
2346 | uq = gq = NULL; | |
c8ad20ff | 2347 | if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) { |
1da177e4 LT |
2348 | if (ip->i_d.di_uid != uid) { |
2349 | /* | |
2350 | * What we need is the dquot that has this uid, and | |
2351 | * if we send the inode to dqget, the uid of the inode | |
2352 | * takes priority over what's sent in the uid argument. | |
2353 | * We must unlock inode here before calling dqget if | |
2354 | * we're not sending the inode, because otherwise | |
2355 | * we'll deadlock by doing trans_reserve while | |
2356 | * holding ilock. | |
2357 | */ | |
2358 | xfs_iunlock(ip, lockflags); | |
2359 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid, | |
2360 | XFS_DQ_USER, | |
2361 | XFS_QMOPT_DQALLOC | | |
2362 | XFS_QMOPT_DOWARN, | |
2363 | &uq))) { | |
2364 | ASSERT(error != ENOENT); | |
014c2544 | 2365 | return error; |
1da177e4 LT |
2366 | } |
2367 | /* | |
2368 | * Get the ilock in the right order. | |
2369 | */ | |
2370 | xfs_dqunlock(uq); | |
2371 | lockflags = XFS_ILOCK_SHARED; | |
2372 | xfs_ilock(ip, lockflags); | |
2373 | } else { | |
2374 | /* | |
2375 | * Take an extra reference, because we'll return | |
2376 | * this to caller | |
2377 | */ | |
2378 | ASSERT(ip->i_udquot); | |
2379 | uq = ip->i_udquot; | |
2380 | xfs_dqlock(uq); | |
2381 | XFS_DQHOLD(uq); | |
2382 | xfs_dqunlock(uq); | |
2383 | } | |
2384 | } | |
c8ad20ff | 2385 | if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) { |
1da177e4 LT |
2386 | if (ip->i_d.di_gid != gid) { |
2387 | xfs_iunlock(ip, lockflags); | |
2388 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid, | |
2389 | XFS_DQ_GROUP, | |
2390 | XFS_QMOPT_DQALLOC | | |
2391 | XFS_QMOPT_DOWARN, | |
2392 | &gq))) { | |
2393 | if (uq) | |
2394 | xfs_qm_dqrele(uq); | |
2395 | ASSERT(error != ENOENT); | |
014c2544 | 2396 | return error; |
1da177e4 LT |
2397 | } |
2398 | xfs_dqunlock(gq); | |
2399 | lockflags = XFS_ILOCK_SHARED; | |
2400 | xfs_ilock(ip, lockflags); | |
2401 | } else { | |
2402 | ASSERT(ip->i_gdquot); | |
2403 | gq = ip->i_gdquot; | |
2404 | xfs_dqlock(gq); | |
2405 | XFS_DQHOLD(gq); | |
2406 | xfs_dqunlock(gq); | |
2407 | } | |
c8ad20ff NS |
2408 | } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) { |
2409 | if (ip->i_d.di_projid != prid) { | |
2410 | xfs_iunlock(ip, lockflags); | |
2411 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid, | |
2412 | XFS_DQ_PROJ, | |
2413 | XFS_QMOPT_DQALLOC | | |
2414 | XFS_QMOPT_DOWARN, | |
2415 | &gq))) { | |
2416 | if (uq) | |
2417 | xfs_qm_dqrele(uq); | |
2418 | ASSERT(error != ENOENT); | |
2419 | return (error); | |
2420 | } | |
2421 | xfs_dqunlock(gq); | |
2422 | lockflags = XFS_ILOCK_SHARED; | |
2423 | xfs_ilock(ip, lockflags); | |
2424 | } else { | |
2425 | ASSERT(ip->i_gdquot); | |
2426 | gq = ip->i_gdquot; | |
2427 | xfs_dqlock(gq); | |
2428 | XFS_DQHOLD(gq); | |
2429 | xfs_dqunlock(gq); | |
2430 | } | |
1da177e4 LT |
2431 | } |
2432 | if (uq) | |
2433 | xfs_dqtrace_entry_ino(uq, "DQALLOC", ip); | |
2434 | ||
2435 | xfs_iunlock(ip, lockflags); | |
2436 | if (O_udqpp) | |
2437 | *O_udqpp = uq; | |
2438 | else if (uq) | |
2439 | xfs_qm_dqrele(uq); | |
2440 | if (O_gdqpp) | |
2441 | *O_gdqpp = gq; | |
2442 | else if (gq) | |
2443 | xfs_qm_dqrele(gq); | |
014c2544 | 2444 | return 0; |
1da177e4 LT |
2445 | } |
2446 | ||
2447 | /* | |
2448 | * Actually transfer ownership, and do dquot modifications. | |
2449 | * These were already reserved. | |
2450 | */ | |
2451 | xfs_dquot_t * | |
2452 | xfs_qm_vop_chown( | |
2453 | xfs_trans_t *tp, | |
2454 | xfs_inode_t *ip, | |
2455 | xfs_dquot_t **IO_olddq, | |
2456 | xfs_dquot_t *newdq) | |
2457 | { | |
2458 | xfs_dquot_t *prevdq; | |
06d10dd9 NS |
2459 | uint bfield = XFS_IS_REALTIME_INODE(ip) ? |
2460 | XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT; | |
2461 | ||
7d095257 | 2462 | |
579aa9ca | 2463 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
2464 | ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount)); |
2465 | ||
2466 | /* old dquot */ | |
2467 | prevdq = *IO_olddq; | |
2468 | ASSERT(prevdq); | |
2469 | ASSERT(prevdq != newdq); | |
2470 | ||
06d10dd9 NS |
2471 | xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks)); |
2472 | xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1); | |
1da177e4 LT |
2473 | |
2474 | /* the sparkling new dquot */ | |
06d10dd9 NS |
2475 | xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks); |
2476 | xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1); | |
1da177e4 LT |
2477 | |
2478 | /* | |
2479 | * Take an extra reference, because the inode | |
2480 | * is going to keep this dquot pointer even | |
2481 | * after the trans_commit. | |
2482 | */ | |
2483 | xfs_dqlock(newdq); | |
2484 | XFS_DQHOLD(newdq); | |
2485 | xfs_dqunlock(newdq); | |
2486 | *IO_olddq = newdq; | |
2487 | ||
014c2544 | 2488 | return prevdq; |
1da177e4 LT |
2489 | } |
2490 | ||
2491 | /* | |
c8ad20ff | 2492 | * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID). |
1da177e4 LT |
2493 | */ |
2494 | int | |
2495 | xfs_qm_vop_chown_reserve( | |
2496 | xfs_trans_t *tp, | |
2497 | xfs_inode_t *ip, | |
2498 | xfs_dquot_t *udqp, | |
2499 | xfs_dquot_t *gdqp, | |
2500 | uint flags) | |
2501 | { | |
7d095257 | 2502 | xfs_mount_t *mp = ip->i_mount; |
9a2a7de2 | 2503 | uint delblks, blkflags, prjflags = 0; |
1da177e4 | 2504 | xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq; |
7d095257 CH |
2505 | int error; |
2506 | ||
1da177e4 | 2507 | |
579aa9ca | 2508 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
1da177e4 LT |
2509 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
2510 | ||
2511 | delblks = ip->i_delayed_blks; | |
2512 | delblksudq = delblksgdq = unresudq = unresgdq = NULL; | |
06d10dd9 NS |
2513 | blkflags = XFS_IS_REALTIME_INODE(ip) ? |
2514 | XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
2515 | |
2516 | if (XFS_IS_UQUOTA_ON(mp) && udqp && | |
1149d96a | 2517 | ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) { |
1da177e4 LT |
2518 | delblksudq = udqp; |
2519 | /* | |
2520 | * If there are delayed allocation blocks, then we have to | |
2521 | * unreserve those from the old dquot, and add them to the | |
2522 | * new dquot. | |
2523 | */ | |
2524 | if (delblks) { | |
2525 | ASSERT(ip->i_udquot); | |
2526 | unresudq = ip->i_udquot; | |
2527 | } | |
2528 | } | |
c8ad20ff | 2529 | if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) { |
9a2a7de2 NS |
2530 | if (XFS_IS_PQUOTA_ON(ip->i_mount) && |
2531 | ip->i_d.di_projid != be32_to_cpu(gdqp->q_core.d_id)) | |
2532 | prjflags = XFS_QMOPT_ENOSPC; | |
2533 | ||
2534 | if (prjflags || | |
2535 | (XFS_IS_GQUOTA_ON(ip->i_mount) && | |
2536 | ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) { | |
c8ad20ff NS |
2537 | delblksgdq = gdqp; |
2538 | if (delblks) { | |
2539 | ASSERT(ip->i_gdquot); | |
2540 | unresgdq = ip->i_gdquot; | |
2541 | } | |
1da177e4 LT |
2542 | } |
2543 | } | |
2544 | ||
2545 | if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount, | |
2546 | delblksudq, delblksgdq, ip->i_d.di_nblocks, 1, | |
9a2a7de2 | 2547 | flags | blkflags | prjflags))) |
1da177e4 LT |
2548 | return (error); |
2549 | ||
2550 | /* | |
2551 | * Do the delayed blks reservations/unreservations now. Since, these | |
2552 | * are done without the help of a transaction, if a reservation fails | |
2553 | * its previous reservations won't be automatically undone by trans | |
2554 | * code. So, we have to do it manually here. | |
2555 | */ | |
2556 | if (delblks) { | |
2557 | /* | |
2558 | * Do the reservations first. Unreservation can't fail. | |
2559 | */ | |
2560 | ASSERT(delblksudq || delblksgdq); | |
2561 | ASSERT(unresudq || unresgdq); | |
2562 | if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2563 | delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0, | |
9a2a7de2 | 2564 | flags | blkflags | prjflags))) |
1da177e4 LT |
2565 | return (error); |
2566 | xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2567 | unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0, | |
06d10dd9 | 2568 | blkflags); |
1da177e4 LT |
2569 | } |
2570 | ||
2571 | return (0); | |
2572 | } | |
2573 | ||
2574 | int | |
2575 | xfs_qm_vop_rename_dqattach( | |
7d095257 | 2576 | struct xfs_inode **i_tab) |
1da177e4 | 2577 | { |
7d095257 CH |
2578 | struct xfs_mount *mp = i_tab[0]->i_mount; |
2579 | int i; | |
1da177e4 | 2580 | |
7d095257 | 2581 | if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) |
014c2544 | 2582 | return 0; |
1da177e4 | 2583 | |
7d095257 CH |
2584 | for (i = 0; (i < 4 && i_tab[i]); i++) { |
2585 | struct xfs_inode *ip = i_tab[i]; | |
2586 | int error; | |
2587 | ||
1da177e4 LT |
2588 | /* |
2589 | * Watch out for duplicate entries in the table. | |
2590 | */ | |
7d095257 CH |
2591 | if (i == 0 || ip != i_tab[i-1]) { |
2592 | if (XFS_NOT_DQATTACHED(mp, ip)) { | |
1da177e4 LT |
2593 | error = xfs_qm_dqattach(ip, 0); |
2594 | if (error) | |
014c2544 | 2595 | return error; |
1da177e4 LT |
2596 | } |
2597 | } | |
2598 | } | |
014c2544 | 2599 | return 0; |
1da177e4 LT |
2600 | } |
2601 | ||
2602 | void | |
7d095257 CH |
2603 | xfs_qm_vop_create_dqattach( |
2604 | struct xfs_trans *tp, | |
2605 | struct xfs_inode *ip, | |
2606 | struct xfs_dquot *udqp, | |
2607 | struct xfs_dquot *gdqp) | |
1da177e4 | 2608 | { |
7d095257 CH |
2609 | struct xfs_mount *mp = tp->t_mountp; |
2610 | ||
2611 | if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp)) | |
1da177e4 LT |
2612 | return; |
2613 | ||
579aa9ca | 2614 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
7d095257 | 2615 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
1da177e4 LT |
2616 | |
2617 | if (udqp) { | |
2618 | xfs_dqlock(udqp); | |
2619 | XFS_DQHOLD(udqp); | |
2620 | xfs_dqunlock(udqp); | |
2621 | ASSERT(ip->i_udquot == NULL); | |
2622 | ip->i_udquot = udqp; | |
7d095257 | 2623 | ASSERT(XFS_IS_UQUOTA_ON(mp)); |
1149d96a | 2624 | ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id)); |
1da177e4 LT |
2625 | xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1); |
2626 | } | |
2627 | if (gdqp) { | |
2628 | xfs_dqlock(gdqp); | |
2629 | XFS_DQHOLD(gdqp); | |
2630 | xfs_dqunlock(gdqp); | |
2631 | ASSERT(ip->i_gdquot == NULL); | |
2632 | ip->i_gdquot = gdqp; | |
7d095257 CH |
2633 | ASSERT(XFS_IS_OQUOTA_ON(mp)); |
2634 | ASSERT((XFS_IS_GQUOTA_ON(mp) ? | |
ee2a4f7c NS |
2635 | ip->i_d.di_gid : ip->i_d.di_projid) == |
2636 | be32_to_cpu(gdqp->q_core.d_id)); | |
1da177e4 LT |
2637 | xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1); |
2638 | } | |
2639 | } | |
2640 | ||
2641 | /* ------------- list stuff -----------------*/ | |
ba0f32d4 | 2642 | STATIC void |
1da177e4 LT |
2643 | xfs_qm_freelist_init(xfs_frlist_t *ql) |
2644 | { | |
2645 | ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql; | |
794ee1ba | 2646 | mutex_init(&ql->qh_lock); |
1da177e4 LT |
2647 | ql->qh_version = 0; |
2648 | ql->qh_nelems = 0; | |
2649 | } | |
2650 | ||
ba0f32d4 | 2651 | STATIC void |
1da177e4 LT |
2652 | xfs_qm_freelist_destroy(xfs_frlist_t *ql) |
2653 | { | |
2654 | xfs_dquot_t *dqp, *nextdqp; | |
2655 | ||
794ee1ba | 2656 | mutex_lock(&ql->qh_lock); |
1da177e4 LT |
2657 | for (dqp = ql->qh_next; |
2658 | dqp != (xfs_dquot_t *)ql; ) { | |
2659 | xfs_dqlock(dqp); | |
2660 | nextdqp = dqp->dq_flnext; | |
2661 | #ifdef QUOTADEBUG | |
2662 | cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp); | |
2663 | #endif | |
2664 | XQM_FREELIST_REMOVE(dqp); | |
2665 | xfs_dqunlock(dqp); | |
2666 | xfs_qm_dqdestroy(dqp); | |
2667 | dqp = nextdqp; | |
2668 | } | |
20722a91 | 2669 | mutex_unlock(&ql->qh_lock); |
1da177e4 LT |
2670 | mutex_destroy(&ql->qh_lock); |
2671 | ||
2672 | ASSERT(ql->qh_nelems == 0); | |
2673 | } | |
2674 | ||
ba0f32d4 | 2675 | STATIC void |
1da177e4 LT |
2676 | xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq) |
2677 | { | |
2678 | dq->dq_flnext = ql->qh_next; | |
2679 | dq->dq_flprev = (xfs_dquot_t *)ql; | |
2680 | ql->qh_next = dq; | |
2681 | dq->dq_flnext->dq_flprev = dq; | |
2682 | xfs_Gqm->qm_dqfreelist.qh_nelems++; | |
2683 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2684 | } | |
2685 | ||
2686 | void | |
2687 | xfs_qm_freelist_unlink(xfs_dquot_t *dq) | |
2688 | { | |
2689 | xfs_dquot_t *next = dq->dq_flnext; | |
2690 | xfs_dquot_t *prev = dq->dq_flprev; | |
2691 | ||
2692 | next->dq_flprev = prev; | |
2693 | prev->dq_flnext = next; | |
2694 | dq->dq_flnext = dq->dq_flprev = dq; | |
2695 | xfs_Gqm->qm_dqfreelist.qh_nelems--; | |
2696 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2697 | } | |
2698 | ||
2699 | void | |
2700 | xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq) | |
2701 | { | |
2702 | xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq); | |
2703 | } |