Commit | Line | Data |
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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_clnt.h" |
24 | #include "xfs_trans.h" | |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 LT |
27 | #include "xfs_dir2.h" |
28 | #include "xfs_alloc.h" | |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_quota.h" | |
31 | #include "xfs_mount.h" | |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 | 34 | #include "xfs_ialloc_btree.h" |
1da177e4 | 35 | #include "xfs_dir2_sf.h" |
a844f451 | 36 | #include "xfs_attr_sf.h" |
1da177e4 LT |
37 | #include "xfs_dinode.h" |
38 | #include "xfs_inode.h" | |
a844f451 NS |
39 | #include "xfs_btree.h" |
40 | #include "xfs_ialloc.h" | |
41 | #include "xfs_itable.h" | |
1da177e4 LT |
42 | #include "xfs_rtalloc.h" |
43 | #include "xfs_error.h" | |
a844f451 | 44 | #include "xfs_bmap.h" |
1da177e4 LT |
45 | #include "xfs_rw.h" |
46 | #include "xfs_acl.h" | |
1da177e4 LT |
47 | #include "xfs_attr.h" |
48 | #include "xfs_buf_item.h" | |
49 | #include "xfs_trans_space.h" | |
50 | #include "xfs_utils.h" | |
1da177e4 LT |
51 | #include "xfs_qm.h" |
52 | ||
53 | /* | |
54 | * The global quota manager. There is only one of these for the entire | |
55 | * system, _not_ one per file system. XQM keeps track of the overall | |
56 | * quota functionality, including maintaining the freelist and hash | |
57 | * tables of dquots. | |
58 | */ | |
6b3f6b5b | 59 | mutex_t xfs_Gqm_lock; |
1da177e4 | 60 | struct xfs_qm *xfs_Gqm; |
6b3f6b5b | 61 | uint ndquot; |
1da177e4 LT |
62 | |
63 | kmem_zone_t *qm_dqzone; | |
64 | kmem_zone_t *qm_dqtrxzone; | |
1da177e4 | 65 | |
7989cb8e | 66 | static cred_t xfs_zerocr; |
dae81d47 | 67 | |
1da177e4 LT |
68 | STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int); |
69 | STATIC void xfs_qm_list_destroy(xfs_dqlist_t *); | |
70 | ||
ba0f32d4 CH |
71 | STATIC void xfs_qm_freelist_init(xfs_frlist_t *); |
72 | STATIC void xfs_qm_freelist_destroy(xfs_frlist_t *); | |
73 | STATIC int xfs_qm_mplist_nowait(xfs_mount_t *); | |
74 | STATIC int xfs_qm_dqhashlock_nowait(xfs_dquot_t *); | |
75 | ||
1da177e4 | 76 | STATIC int xfs_qm_init_quotainos(xfs_mount_t *); |
ba0f32d4 | 77 | STATIC int xfs_qm_init_quotainfo(xfs_mount_t *); |
51bfb75b | 78 | STATIC int xfs_qm_shake(int, gfp_t); |
1da177e4 | 79 | |
8e1f936b RR |
80 | static struct shrinker xfs_qm_shaker = { |
81 | .shrink = xfs_qm_shake, | |
82 | .seeks = DEFAULT_SEEKS, | |
83 | }; | |
84 | ||
1da177e4 LT |
85 | #ifdef DEBUG |
86 | extern mutex_t qcheck_lock; | |
87 | #endif | |
88 | ||
89 | #ifdef QUOTADEBUG | |
90 | #define XQM_LIST_PRINT(l, NXT, title) \ | |
91 | { \ | |
92 | xfs_dquot_t *dqp; int i = 0; \ | |
93 | cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \ | |
94 | for (dqp = (l)->qh_next; dqp != NULL; dqp = dqp->NXT) { \ | |
95 | cmn_err(CE_DEBUG, " %d. \"%d (%s)\" " \ | |
96 | "bcnt = %d, icnt = %d, refs = %d", \ | |
1149d96a | 97 | ++i, (int) be32_to_cpu(dqp->q_core.d_id), \ |
1da177e4 | 98 | DQFLAGTO_TYPESTR(dqp), \ |
1149d96a CH |
99 | (int) be64_to_cpu(dqp->q_core.d_bcount), \ |
100 | (int) be64_to_cpu(dqp->q_core.d_icount), \ | |
1da177e4 LT |
101 | (int) dqp->q_nrefs); } \ |
102 | } | |
103 | #else | |
104 | #define XQM_LIST_PRINT(l, NXT, title) do { } while (0) | |
105 | #endif | |
106 | ||
107 | /* | |
108 | * Initialize the XQM structure. | |
109 | * Note that there is not one quota manager per file system. | |
110 | */ | |
111 | STATIC struct xfs_qm * | |
112 | xfs_Gqm_init(void) | |
113 | { | |
6b3f6b5b NS |
114 | xfs_dqhash_t *udqhash, *gdqhash; |
115 | xfs_qm_t *xqm; | |
215101c3 NS |
116 | size_t hsize; |
117 | uint i; | |
1da177e4 LT |
118 | |
119 | /* | |
120 | * Initialize the dquot hash tables. | |
121 | */ | |
77e4635a | 122 | udqhash = kmem_zalloc_greedy(&hsize, |
5995cb7d ES |
123 | XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t), |
124 | XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t), | |
77e4635a NS |
125 | KM_SLEEP | KM_MAYFAIL | KM_LARGE); |
126 | gdqhash = kmem_zalloc(hsize, KM_SLEEP | KM_LARGE); | |
127 | hsize /= sizeof(xfs_dqhash_t); | |
6b3f6b5b | 128 | ndquot = hsize << 8; |
1da177e4 | 129 | |
6b3f6b5b NS |
130 | xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP); |
131 | xqm->qm_dqhashmask = hsize - 1; | |
132 | xqm->qm_usr_dqhtable = udqhash; | |
133 | xqm->qm_grp_dqhtable = gdqhash; | |
1da177e4 LT |
134 | ASSERT(xqm->qm_usr_dqhtable != NULL); |
135 | ASSERT(xqm->qm_grp_dqhtable != NULL); | |
136 | ||
137 | for (i = 0; i < hsize; i++) { | |
138 | xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i); | |
139 | xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Freelist of all dquots of all file systems | |
144 | */ | |
145 | xfs_qm_freelist_init(&(xqm->qm_dqfreelist)); | |
146 | ||
147 | /* | |
148 | * dquot zone. we register our own low-memory callback. | |
149 | */ | |
150 | if (!qm_dqzone) { | |
151 | xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t), | |
152 | "xfs_dquots"); | |
153 | qm_dqzone = xqm->qm_dqzone; | |
154 | } else | |
155 | xqm->qm_dqzone = qm_dqzone; | |
156 | ||
8e1f936b | 157 | register_shrinker(&xfs_qm_shaker); |
1da177e4 LT |
158 | |
159 | /* | |
160 | * The t_dqinfo portion of transactions. | |
161 | */ | |
162 | if (!qm_dqtrxzone) { | |
163 | xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t), | |
164 | "xfs_dqtrx"); | |
165 | qm_dqtrxzone = xqm->qm_dqtrxzone; | |
166 | } else | |
167 | xqm->qm_dqtrxzone = qm_dqtrxzone; | |
168 | ||
169 | atomic_set(&xqm->qm_totaldquots, 0); | |
170 | xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO; | |
171 | xqm->qm_nrefs = 0; | |
172 | #ifdef DEBUG | |
c2e81432 | 173 | mutex_init(&qcheck_lock); |
1da177e4 LT |
174 | #endif |
175 | return xqm; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Destroy the global quota manager when its reference count goes to zero. | |
180 | */ | |
ba0f32d4 | 181 | STATIC void |
1da177e4 LT |
182 | xfs_qm_destroy( |
183 | struct xfs_qm *xqm) | |
184 | { | |
185 | int hsize, i; | |
186 | ||
187 | ASSERT(xqm != NULL); | |
188 | ASSERT(xqm->qm_nrefs == 0); | |
8e1f936b | 189 | unregister_shrinker(&xfs_qm_shaker); |
1da177e4 LT |
190 | hsize = xqm->qm_dqhashmask + 1; |
191 | for (i = 0; i < hsize; i++) { | |
192 | xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i])); | |
193 | xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i])); | |
194 | } | |
195 | kmem_free(xqm->qm_usr_dqhtable, hsize * sizeof(xfs_dqhash_t)); | |
196 | kmem_free(xqm->qm_grp_dqhtable, hsize * sizeof(xfs_dqhash_t)); | |
197 | xqm->qm_usr_dqhtable = NULL; | |
198 | xqm->qm_grp_dqhtable = NULL; | |
199 | xqm->qm_dqhashmask = 0; | |
200 | xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist)); | |
201 | #ifdef DEBUG | |
202 | mutex_destroy(&qcheck_lock); | |
203 | #endif | |
204 | kmem_free(xqm, sizeof(xfs_qm_t)); | |
205 | } | |
206 | ||
207 | /* | |
208 | * Called at mount time to let XQM know that another file system is | |
209 | * starting quotas. This isn't crucial information as the individual mount | |
210 | * structures are pretty independent, but it helps the XQM keep a | |
211 | * global view of what's going on. | |
212 | */ | |
213 | /* ARGSUSED */ | |
214 | STATIC int | |
215 | xfs_qm_hold_quotafs_ref( | |
216 | struct xfs_mount *mp) | |
217 | { | |
218 | /* | |
219 | * Need to lock the xfs_Gqm structure for things like this. For example, | |
220 | * the structure could disappear between the entry to this routine and | |
221 | * a HOLD operation if not locked. | |
222 | */ | |
223 | XFS_QM_LOCK(xfs_Gqm); | |
224 | ||
225 | if (xfs_Gqm == NULL) | |
226 | xfs_Gqm = xfs_Gqm_init(); | |
227 | /* | |
228 | * We can keep a list of all filesystems with quotas mounted for | |
229 | * debugging and statistical purposes, but ... | |
230 | * Just take a reference and get out. | |
231 | */ | |
232 | XFS_QM_HOLD(xfs_Gqm); | |
233 | XFS_QM_UNLOCK(xfs_Gqm); | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | ||
239 | /* | |
240 | * Release the reference that a filesystem took at mount time, | |
241 | * so that we know when we need to destroy the entire quota manager. | |
242 | */ | |
243 | /* ARGSUSED */ | |
244 | STATIC void | |
245 | xfs_qm_rele_quotafs_ref( | |
246 | struct xfs_mount *mp) | |
247 | { | |
248 | xfs_dquot_t *dqp, *nextdqp; | |
249 | ||
250 | ASSERT(xfs_Gqm); | |
251 | ASSERT(xfs_Gqm->qm_nrefs > 0); | |
252 | ||
253 | /* | |
254 | * Go thru the freelist and destroy all inactive dquots. | |
255 | */ | |
256 | xfs_qm_freelist_lock(xfs_Gqm); | |
257 | ||
258 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
259 | dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) { | |
260 | xfs_dqlock(dqp); | |
261 | nextdqp = dqp->dq_flnext; | |
262 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
263 | ASSERT(dqp->q_mount == NULL); | |
264 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
265 | ASSERT(dqp->HL_PREVP == NULL); | |
266 | ASSERT(dqp->MPL_PREVP == NULL); | |
267 | XQM_FREELIST_REMOVE(dqp); | |
268 | xfs_dqunlock(dqp); | |
269 | xfs_qm_dqdestroy(dqp); | |
270 | } else { | |
271 | xfs_dqunlock(dqp); | |
272 | } | |
273 | dqp = nextdqp; | |
274 | } | |
275 | xfs_qm_freelist_unlock(xfs_Gqm); | |
276 | ||
277 | /* | |
278 | * Destroy the entire XQM. If somebody mounts with quotaon, this'll | |
279 | * be restarted. | |
280 | */ | |
281 | XFS_QM_LOCK(xfs_Gqm); | |
282 | XFS_QM_RELE(xfs_Gqm); | |
283 | if (xfs_Gqm->qm_nrefs == 0) { | |
284 | xfs_qm_destroy(xfs_Gqm); | |
285 | xfs_Gqm = NULL; | |
286 | } | |
287 | XFS_QM_UNLOCK(xfs_Gqm); | |
288 | } | |
289 | ||
1da177e4 LT |
290 | /* |
291 | * Just destroy the quotainfo structure. | |
292 | */ | |
293 | void | |
294 | xfs_qm_unmount_quotadestroy( | |
295 | xfs_mount_t *mp) | |
296 | { | |
297 | if (mp->m_quotainfo) | |
298 | xfs_qm_destroy_quotainfo(mp); | |
299 | } | |
300 | ||
301 | ||
302 | /* | |
303 | * This is called from xfs_mountfs to start quotas and initialize all | |
304 | * necessary data structures like quotainfo. This is also responsible for | |
305 | * running a quotacheck as necessary. We are guaranteed that the superblock | |
306 | * is consistently read in at this point. | |
53aa7915 DC |
307 | * |
308 | * If we fail here, the mount will continue with quota turned off. We don't | |
309 | * need to inidicate success or failure at all. | |
1da177e4 | 310 | */ |
53aa7915 | 311 | void |
1da177e4 LT |
312 | xfs_qm_mount_quotas( |
313 | xfs_mount_t *mp, | |
314 | int mfsi_flags) | |
315 | { | |
1da177e4 LT |
316 | int error = 0; |
317 | uint sbf; | |
318 | ||
1da177e4 LT |
319 | /* |
320 | * If quotas on realtime volumes is not supported, we disable | |
321 | * quotas immediately. | |
322 | */ | |
323 | if (mp->m_sb.sb_rextents) { | |
324 | cmn_err(CE_NOTE, | |
325 | "Cannot turn on quotas for realtime filesystem %s", | |
326 | mp->m_fsname); | |
327 | mp->m_qflags = 0; | |
328 | goto write_changes; | |
329 | } | |
330 | ||
1da177e4 | 331 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
155ffd07 | 332 | |
1da177e4 LT |
333 | /* |
334 | * Allocate the quotainfo structure inside the mount struct, and | |
335 | * create quotainode(s), and change/rev superblock if necessary. | |
336 | */ | |
53aa7915 DC |
337 | error = xfs_qm_init_quotainfo(mp); |
338 | if (error) { | |
1da177e4 LT |
339 | /* |
340 | * We must turn off quotas. | |
341 | */ | |
342 | ASSERT(mp->m_quotainfo == NULL); | |
343 | mp->m_qflags = 0; | |
344 | goto write_changes; | |
345 | } | |
346 | /* | |
347 | * If any of the quotas are not consistent, do a quotacheck. | |
348 | */ | |
349 | if (XFS_QM_NEED_QUOTACHECK(mp) && | |
53aa7915 DC |
350 | !(mfsi_flags & XFS_MFSI_NO_QUOTACHECK)) { |
351 | error = xfs_qm_quotacheck(mp); | |
352 | if (error) { | |
353 | /* Quotacheck failed and disabled quotas. */ | |
354 | return; | |
1da177e4 | 355 | } |
1da177e4 | 356 | } |
646d5bda DD |
357 | /* |
358 | * If one type of quotas is off, then it will lose its | |
359 | * quotachecked status, since we won't be doing accounting for | |
360 | * that type anymore. | |
361 | */ | |
53aa7915 | 362 | if (!XFS_IS_UQUOTA_ON(mp)) |
646d5bda | 363 | mp->m_qflags &= ~XFS_UQUOTA_CHKD; |
53aa7915 | 364 | if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp))) |
646d5bda | 365 | mp->m_qflags &= ~XFS_OQUOTA_CHKD; |
155ffd07 | 366 | |
1da177e4 LT |
367 | write_changes: |
368 | /* | |
3685c2a1 | 369 | * We actually don't have to acquire the m_sb_lock at all. |
1da177e4 LT |
370 | * This can only be called from mount, and that's single threaded. XXX |
371 | */ | |
3685c2a1 | 372 | spin_lock(&mp->m_sb_lock); |
1da177e4 LT |
373 | sbf = mp->m_sb.sb_qflags; |
374 | mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL; | |
3685c2a1 | 375 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
376 | |
377 | if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) { | |
378 | if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) { | |
379 | /* | |
380 | * We could only have been turning quotas off. | |
381 | * We aren't in very good shape actually because | |
382 | * the incore structures are convinced that quotas are | |
383 | * off, but the on disk superblock doesn't know that ! | |
384 | */ | |
385 | ASSERT(!(XFS_IS_QUOTA_RUNNING(mp))); | |
386 | xfs_fs_cmn_err(CE_ALERT, mp, | |
387 | "XFS mount_quotas: Superblock update failed!"); | |
388 | } | |
389 | } | |
390 | ||
391 | if (error) { | |
392 | xfs_fs_cmn_err(CE_WARN, mp, | |
393 | "Failed to initialize disk quotas."); | |
394 | } | |
53aa7915 | 395 | return; |
1da177e4 LT |
396 | } |
397 | ||
398 | /* | |
399 | * Called from the vfsops layer. | |
400 | */ | |
401 | int | |
402 | xfs_qm_unmount_quotas( | |
403 | xfs_mount_t *mp) | |
404 | { | |
405 | xfs_inode_t *uqp, *gqp; | |
406 | int error = 0; | |
407 | ||
408 | /* | |
409 | * Release the dquots that root inode, et al might be holding, | |
410 | * before we flush quotas and blow away the quotainfo structure. | |
411 | */ | |
412 | ASSERT(mp->m_rootip); | |
413 | xfs_qm_dqdetach(mp->m_rootip); | |
414 | if (mp->m_rbmip) | |
415 | xfs_qm_dqdetach(mp->m_rbmip); | |
416 | if (mp->m_rsumip) | |
417 | xfs_qm_dqdetach(mp->m_rsumip); | |
418 | ||
419 | /* | |
420 | * Flush out the quota inodes. | |
421 | */ | |
422 | uqp = gqp = NULL; | |
423 | if (mp->m_quotainfo) { | |
424 | if ((uqp = mp->m_quotainfo->qi_uquotaip) != NULL) { | |
425 | xfs_ilock(uqp, XFS_ILOCK_EXCL); | |
426 | xfs_iflock(uqp); | |
427 | error = xfs_iflush(uqp, XFS_IFLUSH_SYNC); | |
428 | xfs_iunlock(uqp, XFS_ILOCK_EXCL); | |
429 | if (unlikely(error == EFSCORRUPTED)) { | |
430 | XFS_ERROR_REPORT("xfs_qm_unmount_quotas(1)", | |
431 | XFS_ERRLEVEL_LOW, mp); | |
432 | goto out; | |
433 | } | |
434 | } | |
435 | if ((gqp = mp->m_quotainfo->qi_gquotaip) != NULL) { | |
436 | xfs_ilock(gqp, XFS_ILOCK_EXCL); | |
437 | xfs_iflock(gqp); | |
438 | error = xfs_iflush(gqp, XFS_IFLUSH_SYNC); | |
439 | xfs_iunlock(gqp, XFS_ILOCK_EXCL); | |
440 | if (unlikely(error == EFSCORRUPTED)) { | |
441 | XFS_ERROR_REPORT("xfs_qm_unmount_quotas(2)", | |
442 | XFS_ERRLEVEL_LOW, mp); | |
443 | goto out; | |
444 | } | |
445 | } | |
446 | } | |
447 | if (uqp) { | |
448 | XFS_PURGE_INODE(uqp); | |
449 | mp->m_quotainfo->qi_uquotaip = NULL; | |
450 | } | |
451 | if (gqp) { | |
452 | XFS_PURGE_INODE(gqp); | |
453 | mp->m_quotainfo->qi_gquotaip = NULL; | |
454 | } | |
455 | out: | |
456 | return XFS_ERROR(error); | |
457 | } | |
458 | ||
459 | /* | |
460 | * Flush all dquots of the given file system to disk. The dquots are | |
461 | * _not_ purged from memory here, just their data written to disk. | |
462 | */ | |
ba0f32d4 | 463 | STATIC int |
1da177e4 LT |
464 | xfs_qm_dqflush_all( |
465 | xfs_mount_t *mp, | |
466 | int flags) | |
467 | { | |
468 | int recl; | |
469 | xfs_dquot_t *dqp; | |
470 | int niters; | |
471 | int error; | |
472 | ||
473 | if (mp->m_quotainfo == NULL) | |
014c2544 | 474 | return 0; |
1da177e4 LT |
475 | niters = 0; |
476 | again: | |
477 | xfs_qm_mplist_lock(mp); | |
478 | FOREACH_DQUOT_IN_MP(dqp, mp) { | |
479 | xfs_dqlock(dqp); | |
480 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
481 | xfs_dqunlock(dqp); | |
482 | continue; | |
483 | } | |
484 | xfs_dqtrace_entry(dqp, "FLUSHALL: DQDIRTY"); | |
485 | /* XXX a sentinel would be better */ | |
486 | recl = XFS_QI_MPLRECLAIMS(mp); | |
487 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
488 | /* | |
489 | * If we can't grab the flush lock then check | |
490 | * to see if the dquot has been flushed delayed | |
491 | * write. If so, grab its buffer and send it | |
492 | * out immediately. We'll be able to acquire | |
493 | * the flush lock when the I/O completes. | |
494 | */ | |
495 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
496 | } | |
497 | /* | |
498 | * Let go of the mplist lock. We don't want to hold it | |
499 | * across a disk write. | |
500 | */ | |
501 | xfs_qm_mplist_unlock(mp); | |
502 | error = xfs_qm_dqflush(dqp, flags); | |
503 | xfs_dqunlock(dqp); | |
504 | if (error) | |
014c2544 | 505 | return error; |
1da177e4 LT |
506 | |
507 | xfs_qm_mplist_lock(mp); | |
508 | if (recl != XFS_QI_MPLRECLAIMS(mp)) { | |
509 | xfs_qm_mplist_unlock(mp); | |
510 | /* XXX restart limit */ | |
511 | goto again; | |
512 | } | |
513 | } | |
514 | ||
515 | xfs_qm_mplist_unlock(mp); | |
516 | /* return ! busy */ | |
014c2544 | 517 | return 0; |
1da177e4 LT |
518 | } |
519 | /* | |
520 | * Release the group dquot pointers the user dquots may be | |
521 | * carrying around as a hint. mplist is locked on entry and exit. | |
522 | */ | |
523 | STATIC void | |
524 | xfs_qm_detach_gdquots( | |
525 | xfs_mount_t *mp) | |
526 | { | |
527 | xfs_dquot_t *dqp, *gdqp; | |
528 | int nrecl; | |
529 | ||
530 | again: | |
531 | ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp)); | |
532 | dqp = XFS_QI_MPLNEXT(mp); | |
533 | while (dqp) { | |
534 | xfs_dqlock(dqp); | |
535 | if ((gdqp = dqp->q_gdquot)) { | |
536 | xfs_dqlock(gdqp); | |
537 | dqp->q_gdquot = NULL; | |
538 | } | |
539 | xfs_dqunlock(dqp); | |
540 | ||
541 | if (gdqp) { | |
542 | /* | |
543 | * Can't hold the mplist lock across a dqput. | |
544 | * XXXmust convert to marker based iterations here. | |
545 | */ | |
546 | nrecl = XFS_QI_MPLRECLAIMS(mp); | |
547 | xfs_qm_mplist_unlock(mp); | |
548 | xfs_qm_dqput(gdqp); | |
549 | ||
550 | xfs_qm_mplist_lock(mp); | |
551 | if (nrecl != XFS_QI_MPLRECLAIMS(mp)) | |
552 | goto again; | |
553 | } | |
554 | dqp = dqp->MPL_NEXT; | |
555 | } | |
556 | } | |
557 | ||
558 | /* | |
559 | * Go through all the incore dquots of this file system and take them | |
560 | * off the mplist and hashlist, if the dquot type matches the dqtype | |
561 | * parameter. This is used when turning off quota accounting for | |
562 | * users and/or groups, as well as when the filesystem is unmounting. | |
563 | */ | |
564 | STATIC int | |
565 | xfs_qm_dqpurge_int( | |
566 | xfs_mount_t *mp, | |
c8ad20ff | 567 | uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/PQUOTA/GQUOTA */ |
1da177e4 LT |
568 | { |
569 | xfs_dquot_t *dqp; | |
570 | uint dqtype; | |
571 | int nrecl; | |
572 | xfs_dquot_t *nextdqp; | |
573 | int nmisses; | |
574 | ||
575 | if (mp->m_quotainfo == NULL) | |
014c2544 | 576 | return 0; |
1da177e4 LT |
577 | |
578 | dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0; | |
c8ad20ff | 579 | dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0; |
1da177e4 LT |
580 | dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0; |
581 | ||
582 | xfs_qm_mplist_lock(mp); | |
583 | ||
584 | /* | |
585 | * In the first pass through all incore dquots of this filesystem, | |
586 | * we release the group dquot pointers the user dquots may be | |
587 | * carrying around as a hint. We need to do this irrespective of | |
588 | * what's being turned off. | |
589 | */ | |
590 | xfs_qm_detach_gdquots(mp); | |
591 | ||
592 | again: | |
593 | nmisses = 0; | |
594 | ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp)); | |
595 | /* | |
596 | * Try to get rid of all of the unwanted dquots. The idea is to | |
597 | * get them off mplist and hashlist, but leave them on freelist. | |
598 | */ | |
599 | dqp = XFS_QI_MPLNEXT(mp); | |
600 | while (dqp) { | |
601 | /* | |
602 | * It's OK to look at the type without taking dqlock here. | |
603 | * We're holding the mplist lock here, and that's needed for | |
604 | * a dqreclaim. | |
605 | */ | |
606 | if ((dqp->dq_flags & dqtype) == 0) { | |
607 | dqp = dqp->MPL_NEXT; | |
608 | continue; | |
609 | } | |
610 | ||
611 | if (! xfs_qm_dqhashlock_nowait(dqp)) { | |
612 | nrecl = XFS_QI_MPLRECLAIMS(mp); | |
613 | xfs_qm_mplist_unlock(mp); | |
614 | XFS_DQ_HASH_LOCK(dqp->q_hash); | |
615 | xfs_qm_mplist_lock(mp); | |
616 | ||
617 | /* | |
618 | * XXXTheoretically, we can get into a very long | |
619 | * ping pong game here. | |
620 | * No one can be adding dquots to the mplist at | |
621 | * this point, but somebody might be taking things off. | |
622 | */ | |
623 | if (nrecl != XFS_QI_MPLRECLAIMS(mp)) { | |
624 | XFS_DQ_HASH_UNLOCK(dqp->q_hash); | |
625 | goto again; | |
626 | } | |
627 | } | |
628 | ||
629 | /* | |
630 | * Take the dquot off the mplist and hashlist. It may remain on | |
631 | * freelist in INACTIVE state. | |
632 | */ | |
633 | nextdqp = dqp->MPL_NEXT; | |
634 | nmisses += xfs_qm_dqpurge(dqp, flags); | |
635 | dqp = nextdqp; | |
636 | } | |
637 | xfs_qm_mplist_unlock(mp); | |
638 | return nmisses; | |
639 | } | |
640 | ||
641 | int | |
642 | xfs_qm_dqpurge_all( | |
643 | xfs_mount_t *mp, | |
644 | uint flags) | |
645 | { | |
646 | int ndquots; | |
647 | ||
648 | /* | |
649 | * Purge the dquot cache. | |
650 | * None of the dquots should really be busy at this point. | |
651 | */ | |
652 | if (mp->m_quotainfo) { | |
653 | while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) { | |
654 | delay(ndquots * 10); | |
655 | } | |
656 | } | |
657 | return 0; | |
658 | } | |
659 | ||
660 | STATIC int | |
661 | xfs_qm_dqattach_one( | |
662 | xfs_inode_t *ip, | |
663 | xfs_dqid_t id, | |
664 | uint type, | |
665 | uint doalloc, | |
666 | uint dolock, | |
667 | xfs_dquot_t *udqhint, /* hint */ | |
668 | xfs_dquot_t **IO_idqpp) | |
669 | { | |
670 | xfs_dquot_t *dqp; | |
671 | int error; | |
672 | ||
579aa9ca | 673 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
674 | error = 0; |
675 | /* | |
676 | * See if we already have it in the inode itself. IO_idqpp is | |
677 | * &i_udquot or &i_gdquot. This made the code look weird, but | |
678 | * made the logic a lot simpler. | |
679 | */ | |
680 | if ((dqp = *IO_idqpp)) { | |
681 | if (dolock) | |
682 | xfs_dqlock(dqp); | |
683 | xfs_dqtrace_entry(dqp, "DQATTACH: found in ip"); | |
684 | goto done; | |
685 | } | |
686 | ||
687 | /* | |
688 | * udqhint is the i_udquot field in inode, and is non-NULL only | |
c8ad20ff | 689 | * when the type arg is group/project. Its purpose is to save a |
1da177e4 LT |
690 | * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside |
691 | * the user dquot. | |
692 | */ | |
c8ad20ff | 693 | ASSERT(!udqhint || type == XFS_DQ_GROUP || type == XFS_DQ_PROJ); |
1da177e4 LT |
694 | if (udqhint && !dolock) |
695 | xfs_dqlock(udqhint); | |
696 | ||
697 | /* | |
698 | * No need to take dqlock to look at the id. | |
699 | * The ID can't change until it gets reclaimed, and it won't | |
700 | * be reclaimed as long as we have a ref from inode and we hold | |
701 | * the ilock. | |
702 | */ | |
703 | if (udqhint && | |
704 | (dqp = udqhint->q_gdquot) && | |
1149d96a | 705 | (be32_to_cpu(dqp->q_core.d_id) == id)) { |
1da177e4 LT |
706 | ASSERT(XFS_DQ_IS_LOCKED(udqhint)); |
707 | xfs_dqlock(dqp); | |
708 | XFS_DQHOLD(dqp); | |
709 | ASSERT(*IO_idqpp == NULL); | |
710 | *IO_idqpp = dqp; | |
711 | if (!dolock) { | |
712 | xfs_dqunlock(dqp); | |
713 | xfs_dqunlock(udqhint); | |
714 | } | |
715 | goto done; | |
716 | } | |
717 | /* | |
718 | * We can't hold a dquot lock when we call the dqget code. | |
719 | * We'll deadlock in no time, because of (not conforming to) | |
720 | * lock ordering - the inodelock comes before any dquot lock, | |
721 | * and we may drop and reacquire the ilock in xfs_qm_dqget(). | |
722 | */ | |
723 | if (udqhint) | |
724 | xfs_dqunlock(udqhint); | |
725 | /* | |
726 | * Find the dquot from somewhere. This bumps the | |
727 | * reference count of dquot and returns it locked. | |
728 | * This can return ENOENT if dquot didn't exist on | |
729 | * disk and we didn't ask it to allocate; | |
730 | * ESRCH if quotas got turned off suddenly. | |
731 | */ | |
732 | if ((error = xfs_qm_dqget(ip->i_mount, ip, id, type, | |
733 | doalloc|XFS_QMOPT_DOWARN, &dqp))) { | |
734 | if (udqhint && dolock) | |
735 | xfs_dqlock(udqhint); | |
736 | goto done; | |
737 | } | |
738 | ||
739 | xfs_dqtrace_entry(dqp, "DQATTACH: found by dqget"); | |
740 | /* | |
741 | * dqget may have dropped and re-acquired the ilock, but it guarantees | |
742 | * that the dquot returned is the one that should go in the inode. | |
743 | */ | |
744 | *IO_idqpp = dqp; | |
745 | ASSERT(dqp); | |
746 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
747 | if (! dolock) { | |
748 | xfs_dqunlock(dqp); | |
749 | goto done; | |
750 | } | |
751 | if (! udqhint) | |
752 | goto done; | |
753 | ||
754 | ASSERT(udqhint); | |
755 | ASSERT(dolock); | |
756 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
757 | if (! xfs_qm_dqlock_nowait(udqhint)) { | |
758 | xfs_dqunlock(dqp); | |
759 | xfs_dqlock(udqhint); | |
760 | xfs_dqlock(dqp); | |
761 | } | |
762 | done: | |
763 | #ifdef QUOTADEBUG | |
764 | if (udqhint) { | |
765 | if (dolock) | |
766 | ASSERT(XFS_DQ_IS_LOCKED(udqhint)); | |
767 | } | |
768 | if (! error) { | |
769 | if (dolock) | |
770 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
771 | } | |
772 | #endif | |
014c2544 | 773 | return error; |
1da177e4 LT |
774 | } |
775 | ||
776 | ||
777 | /* | |
778 | * Given a udquot and gdquot, attach a ptr to the group dquot in the | |
779 | * udquot as a hint for future lookups. The idea sounds simple, but the | |
780 | * execution isn't, because the udquot might have a group dquot attached | |
c41564b5 | 781 | * already and getting rid of that gets us into lock ordering constraints. |
1da177e4 LT |
782 | * The process is complicated more by the fact that the dquots may or may not |
783 | * be locked on entry. | |
784 | */ | |
785 | STATIC void | |
786 | xfs_qm_dqattach_grouphint( | |
787 | xfs_dquot_t *udq, | |
788 | xfs_dquot_t *gdq, | |
789 | uint locked) | |
790 | { | |
791 | xfs_dquot_t *tmp; | |
792 | ||
793 | #ifdef QUOTADEBUG | |
794 | if (locked) { | |
795 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
796 | ASSERT(XFS_DQ_IS_LOCKED(gdq)); | |
797 | } | |
798 | #endif | |
799 | if (! locked) | |
800 | xfs_dqlock(udq); | |
801 | ||
802 | if ((tmp = udq->q_gdquot)) { | |
803 | if (tmp == gdq) { | |
804 | if (! locked) | |
805 | xfs_dqunlock(udq); | |
806 | return; | |
807 | } | |
808 | ||
809 | udq->q_gdquot = NULL; | |
810 | /* | |
811 | * We can't keep any dqlocks when calling dqrele, | |
812 | * because the freelist lock comes before dqlocks. | |
813 | */ | |
814 | xfs_dqunlock(udq); | |
815 | if (locked) | |
816 | xfs_dqunlock(gdq); | |
817 | /* | |
818 | * we took a hard reference once upon a time in dqget, | |
819 | * so give it back when the udquot no longer points at it | |
820 | * dqput() does the unlocking of the dquot. | |
821 | */ | |
822 | xfs_qm_dqrele(tmp); | |
823 | ||
824 | xfs_dqlock(udq); | |
825 | xfs_dqlock(gdq); | |
826 | ||
827 | } else { | |
828 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
829 | if (! locked) { | |
830 | xfs_dqlock(gdq); | |
831 | } | |
832 | } | |
833 | ||
834 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
835 | ASSERT(XFS_DQ_IS_LOCKED(gdq)); | |
836 | /* | |
837 | * Somebody could have attached a gdquot here, | |
838 | * when we dropped the uqlock. If so, just do nothing. | |
839 | */ | |
840 | if (udq->q_gdquot == NULL) { | |
841 | XFS_DQHOLD(gdq); | |
842 | udq->q_gdquot = gdq; | |
843 | } | |
844 | if (! locked) { | |
845 | xfs_dqunlock(gdq); | |
846 | xfs_dqunlock(udq); | |
847 | } | |
848 | } | |
849 | ||
850 | ||
851 | /* | |
c8ad20ff NS |
852 | * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON |
853 | * into account. | |
1da177e4 LT |
854 | * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed. |
855 | * If XFS_QMOPT_DQLOCK, the dquot(s) will be returned locked. This option pretty | |
856 | * much made this code a complete mess, but it has been pretty useful. | |
857 | * If XFS_QMOPT_ILOCKED, then inode sent is already locked EXCL. | |
858 | * Inode may get unlocked and relocked in here, and the caller must deal with | |
859 | * the consequences. | |
860 | */ | |
861 | int | |
862 | xfs_qm_dqattach( | |
863 | xfs_inode_t *ip, | |
864 | uint flags) | |
865 | { | |
866 | xfs_mount_t *mp = ip->i_mount; | |
867 | uint nquotas = 0; | |
868 | int error = 0; | |
869 | ||
870 | if ((! XFS_IS_QUOTA_ON(mp)) || | |
871 | (! XFS_NOT_DQATTACHED(mp, ip)) || | |
872 | (ip->i_ino == mp->m_sb.sb_uquotino) || | |
873 | (ip->i_ino == mp->m_sb.sb_gquotino)) | |
014c2544 | 874 | return 0; |
1da177e4 LT |
875 | |
876 | ASSERT((flags & XFS_QMOPT_ILOCKED) == 0 || | |
579aa9ca | 877 | xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
878 | |
879 | if (! (flags & XFS_QMOPT_ILOCKED)) | |
880 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
881 | ||
882 | if (XFS_IS_UQUOTA_ON(mp)) { | |
883 | error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER, | |
884 | flags & XFS_QMOPT_DQALLOC, | |
885 | flags & XFS_QMOPT_DQLOCK, | |
886 | NULL, &ip->i_udquot); | |
887 | if (error) | |
888 | goto done; | |
889 | nquotas++; | |
890 | } | |
579aa9ca CH |
891 | |
892 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
c8ad20ff NS |
893 | if (XFS_IS_OQUOTA_ON(mp)) { |
894 | error = XFS_IS_GQUOTA_ON(mp) ? | |
895 | xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP, | |
896 | flags & XFS_QMOPT_DQALLOC, | |
897 | flags & XFS_QMOPT_DQLOCK, | |
898 | ip->i_udquot, &ip->i_gdquot) : | |
899 | xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ, | |
1da177e4 LT |
900 | flags & XFS_QMOPT_DQALLOC, |
901 | flags & XFS_QMOPT_DQLOCK, | |
902 | ip->i_udquot, &ip->i_gdquot); | |
903 | /* | |
904 | * Don't worry about the udquot that we may have | |
905 | * attached above. It'll get detached, if not already. | |
906 | */ | |
907 | if (error) | |
908 | goto done; | |
909 | nquotas++; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Attach this group quota to the user quota as a hint. | |
914 | * This WON'T, in general, result in a thrash. | |
915 | */ | |
916 | if (nquotas == 2) { | |
579aa9ca | 917 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
918 | ASSERT(ip->i_udquot); |
919 | ASSERT(ip->i_gdquot); | |
920 | ||
921 | /* | |
922 | * We may or may not have the i_udquot locked at this point, | |
923 | * but this check is OK since we don't depend on the i_gdquot to | |
924 | * be accurate 100% all the time. It is just a hint, and this | |
925 | * will succeed in general. | |
926 | */ | |
927 | if (ip->i_udquot->q_gdquot == ip->i_gdquot) | |
928 | goto done; | |
929 | /* | |
930 | * Attach i_gdquot to the gdquot hint inside the i_udquot. | |
931 | */ | |
932 | xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot, | |
933 | flags & XFS_QMOPT_DQLOCK); | |
934 | } | |
935 | ||
936 | done: | |
937 | ||
938 | #ifdef QUOTADEBUG | |
939 | if (! error) { | |
940 | if (ip->i_udquot) { | |
941 | if (flags & XFS_QMOPT_DQLOCK) | |
942 | ASSERT(XFS_DQ_IS_LOCKED(ip->i_udquot)); | |
943 | } | |
944 | if (ip->i_gdquot) { | |
945 | if (flags & XFS_QMOPT_DQLOCK) | |
946 | ASSERT(XFS_DQ_IS_LOCKED(ip->i_gdquot)); | |
947 | } | |
948 | if (XFS_IS_UQUOTA_ON(mp)) | |
949 | ASSERT(ip->i_udquot); | |
c8ad20ff | 950 | if (XFS_IS_OQUOTA_ON(mp)) |
1da177e4 LT |
951 | ASSERT(ip->i_gdquot); |
952 | } | |
953 | #endif | |
954 | ||
955 | if (! (flags & XFS_QMOPT_ILOCKED)) | |
956 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
957 | ||
958 | #ifdef QUOTADEBUG | |
959 | else | |
579aa9ca | 960 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 | 961 | #endif |
014c2544 | 962 | return error; |
1da177e4 LT |
963 | } |
964 | ||
965 | /* | |
966 | * Release dquots (and their references) if any. | |
967 | * The inode should be locked EXCL except when this's called by | |
968 | * xfs_ireclaim. | |
969 | */ | |
970 | void | |
971 | xfs_qm_dqdetach( | |
972 | xfs_inode_t *ip) | |
973 | { | |
974 | if (!(ip->i_udquot || ip->i_gdquot)) | |
975 | return; | |
976 | ||
977 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino); | |
978 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino); | |
1da177e4 | 979 | if (ip->i_udquot) { |
c8ad20ff | 980 | xfs_dqtrace_entry_ino(ip->i_udquot, "DQDETTACH", ip); |
1da177e4 LT |
981 | xfs_qm_dqrele(ip->i_udquot); |
982 | ip->i_udquot = NULL; | |
983 | } | |
984 | if (ip->i_gdquot) { | |
c8ad20ff | 985 | xfs_dqtrace_entry_ino(ip->i_gdquot, "DQDETTACH", ip); |
1da177e4 LT |
986 | xfs_qm_dqrele(ip->i_gdquot); |
987 | ip->i_gdquot = NULL; | |
988 | } | |
989 | } | |
990 | ||
991 | /* | |
992 | * This is called by VFS_SYNC and flags arg determines the caller, | |
993 | * and its motives, as done in xfs_sync. | |
994 | * | |
995 | * vfs_sync: SYNC_FSDATA|SYNC_ATTR|SYNC_BDFLUSH 0x31 | |
996 | * syscall sync: SYNC_FSDATA|SYNC_ATTR|SYNC_DELWRI 0x25 | |
997 | * umountroot : SYNC_WAIT | SYNC_CLOSE | SYNC_ATTR | SYNC_FSDATA | |
998 | */ | |
999 | ||
1000 | int | |
1001 | xfs_qm_sync( | |
1002 | xfs_mount_t *mp, | |
b09cc771 | 1003 | int flags) |
1da177e4 LT |
1004 | { |
1005 | int recl, restarts; | |
1006 | xfs_dquot_t *dqp; | |
1007 | uint flush_flags; | |
1008 | boolean_t nowait; | |
1009 | int error; | |
1010 | ||
d757762b DD |
1011 | if (! XFS_IS_QUOTA_ON(mp)) |
1012 | return 0; | |
1013 | ||
1da177e4 LT |
1014 | restarts = 0; |
1015 | /* | |
1016 | * We won't block unless we are asked to. | |
1017 | */ | |
1018 | nowait = (boolean_t)(flags & SYNC_BDFLUSH || (flags & SYNC_WAIT) == 0); | |
1019 | ||
1020 | again: | |
1021 | xfs_qm_mplist_lock(mp); | |
1022 | /* | |
1023 | * dqpurge_all() also takes the mplist lock and iterate thru all dquots | |
1024 | * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared | |
1025 | * when we have the mplist lock, we know that dquots will be consistent | |
1026 | * as long as we have it locked. | |
1027 | */ | |
1028 | if (! XFS_IS_QUOTA_ON(mp)) { | |
1029 | xfs_qm_mplist_unlock(mp); | |
014c2544 | 1030 | return 0; |
1da177e4 LT |
1031 | } |
1032 | FOREACH_DQUOT_IN_MP(dqp, mp) { | |
1033 | /* | |
1034 | * If this is vfs_sync calling, then skip the dquots that | |
1035 | * don't 'seem' to be dirty. ie. don't acquire dqlock. | |
1036 | * This is very similar to what xfs_sync does with inodes. | |
1037 | */ | |
1038 | if (flags & SYNC_BDFLUSH) { | |
1039 | if (! XFS_DQ_IS_DIRTY(dqp)) | |
1040 | continue; | |
1041 | } | |
1042 | ||
1043 | if (nowait) { | |
1044 | /* | |
1045 | * Try to acquire the dquot lock. We are NOT out of | |
1046 | * lock order, but we just don't want to wait for this | |
1047 | * lock, unless somebody wanted us to. | |
1048 | */ | |
1049 | if (! xfs_qm_dqlock_nowait(dqp)) | |
1050 | continue; | |
1051 | } else { | |
1052 | xfs_dqlock(dqp); | |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * Now, find out for sure if this dquot is dirty or not. | |
1057 | */ | |
1058 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
1059 | xfs_dqunlock(dqp); | |
1060 | continue; | |
1061 | } | |
1062 | ||
1063 | /* XXX a sentinel would be better */ | |
1064 | recl = XFS_QI_MPLRECLAIMS(mp); | |
1065 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
1066 | if (nowait) { | |
1067 | xfs_dqunlock(dqp); | |
1068 | continue; | |
1069 | } | |
1070 | /* | |
1071 | * If we can't grab the flush lock then if the caller | |
c41564b5 | 1072 | * really wanted us to give this our best shot, so |
1da177e4 LT |
1073 | * see if we can give a push to the buffer before we wait |
1074 | * on the flush lock. At this point, we know that | |
c41564b5 | 1075 | * even though the dquot is being flushed, |
1da177e4 LT |
1076 | * it has (new) dirty data. |
1077 | */ | |
1078 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
1079 | } | |
1080 | /* | |
1081 | * Let go of the mplist lock. We don't want to hold it | |
1082 | * across a disk write | |
1083 | */ | |
1084 | flush_flags = (nowait) ? XFS_QMOPT_DELWRI : XFS_QMOPT_SYNC; | |
1085 | xfs_qm_mplist_unlock(mp); | |
1086 | xfs_dqtrace_entry(dqp, "XQM_SYNC: DQFLUSH"); | |
1087 | error = xfs_qm_dqflush(dqp, flush_flags); | |
1088 | xfs_dqunlock(dqp); | |
1089 | if (error && XFS_FORCED_SHUTDOWN(mp)) | |
014c2544 | 1090 | return 0; /* Need to prevent umount failure */ |
1da177e4 | 1091 | else if (error) |
014c2544 | 1092 | return error; |
1da177e4 LT |
1093 | |
1094 | xfs_qm_mplist_lock(mp); | |
1095 | if (recl != XFS_QI_MPLRECLAIMS(mp)) { | |
1096 | if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS) | |
1097 | break; | |
1098 | ||
1099 | xfs_qm_mplist_unlock(mp); | |
1100 | goto again; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | xfs_qm_mplist_unlock(mp); | |
014c2544 | 1105 | return 0; |
1da177e4 LT |
1106 | } |
1107 | ||
1108 | ||
1109 | /* | |
1110 | * This initializes all the quota information that's kept in the | |
1111 | * mount structure | |
1112 | */ | |
ba0f32d4 | 1113 | STATIC int |
1da177e4 LT |
1114 | xfs_qm_init_quotainfo( |
1115 | xfs_mount_t *mp) | |
1116 | { | |
1117 | xfs_quotainfo_t *qinf; | |
1118 | int error; | |
1119 | xfs_dquot_t *dqp; | |
1120 | ||
1121 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1122 | ||
1123 | /* | |
1124 | * Tell XQM that we exist as soon as possible. | |
1125 | */ | |
1126 | if ((error = xfs_qm_hold_quotafs_ref(mp))) { | |
014c2544 | 1127 | return error; |
1da177e4 LT |
1128 | } |
1129 | ||
1130 | qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP); | |
1131 | ||
1132 | /* | |
1133 | * See if quotainodes are setup, and if not, allocate them, | |
1134 | * and change the superblock accordingly. | |
1135 | */ | |
1136 | if ((error = xfs_qm_init_quotainos(mp))) { | |
1137 | kmem_free(qinf, sizeof(xfs_quotainfo_t)); | |
1138 | mp->m_quotainfo = NULL; | |
014c2544 | 1139 | return error; |
1da177e4 LT |
1140 | } |
1141 | ||
007c61c6 | 1142 | spin_lock_init(&qinf->qi_pinlock); |
1da177e4 LT |
1143 | xfs_qm_list_init(&qinf->qi_dqlist, "mpdqlist", 0); |
1144 | qinf->qi_dqreclaims = 0; | |
1145 | ||
1146 | /* mutex used to serialize quotaoffs */ | |
794ee1ba | 1147 | mutex_init(&qinf->qi_quotaofflock); |
1da177e4 LT |
1148 | |
1149 | /* Precalc some constants */ | |
1150 | qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1151 | ASSERT(qinf->qi_dqchunklen); | |
1152 | qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen); | |
1153 | do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t)); | |
1154 | ||
1155 | mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD); | |
1156 | ||
1157 | /* | |
1158 | * We try to get the limits from the superuser's limits fields. | |
1159 | * This is quite hacky, but it is standard quota practice. | |
1160 | * We look at the USR dquot with id == 0 first, but if user quotas | |
1161 | * are not enabled we goto the GRP dquot with id == 0. | |
1162 | * We don't really care to keep separate default limits for user | |
1163 | * and group quotas, at least not at this point. | |
1164 | */ | |
1165 | error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0, | |
c8ad20ff NS |
1166 | XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER : |
1167 | (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP : | |
1168 | XFS_DQ_PROJ), | |
1da177e4 LT |
1169 | XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN, |
1170 | &dqp); | |
1171 | if (! error) { | |
1172 | xfs_disk_dquot_t *ddqp = &dqp->q_core; | |
1173 | ||
1174 | /* | |
1175 | * The warnings and timers set the grace period given to | |
1176 | * a user or group before he or she can not perform any | |
1177 | * more writing. If it is zero, a default is used. | |
1178 | */ | |
1149d96a CH |
1179 | qinf->qi_btimelimit = ddqp->d_btimer ? |
1180 | be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT; | |
1181 | qinf->qi_itimelimit = ddqp->d_itimer ? | |
1182 | be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT; | |
1183 | qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ? | |
1184 | be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT; | |
1185 | qinf->qi_bwarnlimit = ddqp->d_bwarns ? | |
1186 | be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT; | |
1187 | qinf->qi_iwarnlimit = ddqp->d_iwarns ? | |
1188 | be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT; | |
1189 | qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ? | |
1190 | be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT; | |
1191 | qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit); | |
1192 | qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit); | |
1193 | qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit); | |
1194 | qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit); | |
1195 | qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit); | |
1196 | qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit); | |
1da177e4 LT |
1197 | |
1198 | /* | |
1199 | * We sent the XFS_QMOPT_DQSUSER flag to dqget because | |
1200 | * we don't want this dquot cached. We haven't done a | |
1201 | * quotacheck yet, and quotacheck doesn't like incore dquots. | |
1202 | */ | |
1203 | xfs_qm_dqdestroy(dqp); | |
1204 | } else { | |
1205 | qinf->qi_btimelimit = XFS_QM_BTIMELIMIT; | |
1206 | qinf->qi_itimelimit = XFS_QM_ITIMELIMIT; | |
1207 | qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT; | |
1208 | qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT; | |
1209 | qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT; | |
06d10dd9 | 1210 | qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT; |
1da177e4 LT |
1211 | } |
1212 | ||
014c2544 | 1213 | return 0; |
1da177e4 LT |
1214 | } |
1215 | ||
1216 | ||
1217 | /* | |
1218 | * Gets called when unmounting a filesystem or when all quotas get | |
1219 | * turned off. | |
1220 | * This purges the quota inodes, destroys locks and frees itself. | |
1221 | */ | |
1222 | void | |
1223 | xfs_qm_destroy_quotainfo( | |
1224 | xfs_mount_t *mp) | |
1225 | { | |
1226 | xfs_quotainfo_t *qi; | |
1227 | ||
1228 | qi = mp->m_quotainfo; | |
1229 | ASSERT(qi != NULL); | |
1230 | ASSERT(xfs_Gqm != NULL); | |
1231 | ||
1232 | /* | |
1233 | * Release the reference that XQM kept, so that we know | |
1234 | * when the XQM structure should be freed. We cannot assume | |
1235 | * that xfs_Gqm is non-null after this point. | |
1236 | */ | |
1237 | xfs_qm_rele_quotafs_ref(mp); | |
1238 | ||
1239 | spinlock_destroy(&qi->qi_pinlock); | |
1240 | xfs_qm_list_destroy(&qi->qi_dqlist); | |
1241 | ||
1242 | if (qi->qi_uquotaip) { | |
1243 | XFS_PURGE_INODE(qi->qi_uquotaip); | |
1244 | qi->qi_uquotaip = NULL; /* paranoia */ | |
1245 | } | |
1246 | if (qi->qi_gquotaip) { | |
1247 | XFS_PURGE_INODE(qi->qi_gquotaip); | |
1248 | qi->qi_gquotaip = NULL; | |
1249 | } | |
1250 | mutex_destroy(&qi->qi_quotaofflock); | |
1251 | kmem_free(qi, sizeof(xfs_quotainfo_t)); | |
1252 | mp->m_quotainfo = NULL; | |
1253 | } | |
1254 | ||
1255 | ||
1256 | ||
1257 | /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */ | |
1258 | ||
1259 | /* ARGSUSED */ | |
1260 | STATIC void | |
1261 | xfs_qm_list_init( | |
1262 | xfs_dqlist_t *list, | |
1263 | char *str, | |
1264 | int n) | |
1265 | { | |
794ee1ba | 1266 | mutex_init(&list->qh_lock); |
1da177e4 LT |
1267 | list->qh_next = NULL; |
1268 | list->qh_version = 0; | |
1269 | list->qh_nelems = 0; | |
1270 | } | |
1271 | ||
1272 | STATIC void | |
1273 | xfs_qm_list_destroy( | |
1274 | xfs_dqlist_t *list) | |
1275 | { | |
1276 | mutex_destroy(&(list->qh_lock)); | |
1277 | } | |
1278 | ||
1279 | ||
1280 | /* | |
1281 | * Stripped down version of dqattach. This doesn't attach, or even look at the | |
1282 | * dquots attached to the inode. The rationale is that there won't be any | |
1283 | * attached at the time this is called from quotacheck. | |
1284 | */ | |
1285 | STATIC int | |
1286 | xfs_qm_dqget_noattach( | |
1287 | xfs_inode_t *ip, | |
1288 | xfs_dquot_t **O_udqpp, | |
1289 | xfs_dquot_t **O_gdqpp) | |
1290 | { | |
1291 | int error; | |
1292 | xfs_mount_t *mp; | |
1293 | xfs_dquot_t *udqp, *gdqp; | |
1294 | ||
579aa9ca | 1295 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
1296 | mp = ip->i_mount; |
1297 | udqp = NULL; | |
1298 | gdqp = NULL; | |
1299 | ||
1300 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1301 | ASSERT(ip->i_udquot == NULL); | |
1302 | /* | |
1303 | * We want the dquot allocated if it doesn't exist. | |
1304 | */ | |
1305 | if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER, | |
1306 | XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, | |
1307 | &udqp))) { | |
1308 | /* | |
1309 | * Shouldn't be able to turn off quotas here. | |
1310 | */ | |
1311 | ASSERT(error != ESRCH); | |
1312 | ASSERT(error != ENOENT); | |
014c2544 | 1313 | return error; |
1da177e4 LT |
1314 | } |
1315 | ASSERT(udqp); | |
1316 | } | |
1317 | ||
c8ad20ff | 1318 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1319 | ASSERT(ip->i_gdquot == NULL); |
1320 | if (udqp) | |
1321 | xfs_dqunlock(udqp); | |
c8ad20ff NS |
1322 | error = XFS_IS_GQUOTA_ON(mp) ? |
1323 | xfs_qm_dqget(mp, ip, | |
1324 | ip->i_d.di_gid, XFS_DQ_GROUP, | |
1325 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1326 | &gdqp) : | |
1327 | xfs_qm_dqget(mp, ip, | |
1328 | ip->i_d.di_projid, XFS_DQ_PROJ, | |
1329 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1330 | &gdqp); | |
1331 | if (error) { | |
1da177e4 LT |
1332 | if (udqp) |
1333 | xfs_qm_dqrele(udqp); | |
1334 | ASSERT(error != ESRCH); | |
1335 | ASSERT(error != ENOENT); | |
014c2544 | 1336 | return error; |
1da177e4 LT |
1337 | } |
1338 | ASSERT(gdqp); | |
1339 | ||
1340 | /* Reacquire the locks in the right order */ | |
1341 | if (udqp) { | |
1342 | if (! xfs_qm_dqlock_nowait(udqp)) { | |
1343 | xfs_dqunlock(gdqp); | |
1344 | xfs_dqlock(udqp); | |
1345 | xfs_dqlock(gdqp); | |
1346 | } | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | *O_udqpp = udqp; | |
1351 | *O_gdqpp = gdqp; | |
1352 | ||
1353 | #ifdef QUOTADEBUG | |
1354 | if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp)); | |
1355 | if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp)); | |
1356 | #endif | |
014c2544 | 1357 | return 0; |
1da177e4 LT |
1358 | } |
1359 | ||
1360 | /* | |
1361 | * Create an inode and return with a reference already taken, but unlocked | |
1362 | * This is how we create quota inodes | |
1363 | */ | |
1364 | STATIC int | |
1365 | xfs_qm_qino_alloc( | |
1366 | xfs_mount_t *mp, | |
1367 | xfs_inode_t **ip, | |
1368 | __int64_t sbfields, | |
1369 | uint flags) | |
1370 | { | |
1371 | xfs_trans_t *tp; | |
1372 | int error; | |
1da177e4 LT |
1373 | int committed; |
1374 | ||
061f7209 | 1375 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE); |
1da177e4 LT |
1376 | if ((error = xfs_trans_reserve(tp, |
1377 | XFS_QM_QINOCREATE_SPACE_RES(mp), | |
1378 | XFS_CREATE_LOG_RES(mp), 0, | |
1379 | XFS_TRANS_PERM_LOG_RES, | |
1380 | XFS_CREATE_LOG_COUNT))) { | |
1381 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1382 | return error; |
1da177e4 | 1383 | } |
1da177e4 | 1384 | |
b11f94d5 | 1385 | if ((error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, |
dae81d47 | 1386 | &xfs_zerocr, 0, 1, ip, &committed))) { |
1da177e4 LT |
1387 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | |
1388 | XFS_TRANS_ABORT); | |
014c2544 | 1389 | return error; |
1da177e4 LT |
1390 | } |
1391 | ||
1392 | /* | |
1393 | * Keep an extra reference to this quota inode. This inode is | |
1394 | * locked exclusively and joined to the transaction already. | |
1395 | */ | |
579aa9ca | 1396 | ASSERT(xfs_isilocked(*ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
1397 | VN_HOLD(XFS_ITOV((*ip))); |
1398 | ||
1399 | /* | |
1400 | * Make the changes in the superblock, and log those too. | |
1401 | * sbfields arg may contain fields other than *QUOTINO; | |
1402 | * VERSIONNUM for example. | |
1403 | */ | |
3685c2a1 | 1404 | spin_lock(&mp->m_sb_lock); |
1da177e4 LT |
1405 | if (flags & XFS_QMOPT_SBVERSION) { |
1406 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1407 | unsigned oldv = mp->m_sb.sb_versionnum; | |
1408 | #endif | |
62118709 | 1409 | ASSERT(!xfs_sb_version_hasquota(&mp->m_sb)); |
1da177e4 LT |
1410 | ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | |
1411 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) == | |
1412 | (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1413 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)); | |
1414 | ||
62118709 | 1415 | xfs_sb_version_addquota(&mp->m_sb); |
1da177e4 LT |
1416 | mp->m_sb.sb_uquotino = NULLFSINO; |
1417 | mp->m_sb.sb_gquotino = NULLFSINO; | |
1418 | ||
1419 | /* qflags will get updated _after_ quotacheck */ | |
1420 | mp->m_sb.sb_qflags = 0; | |
1421 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1422 | cmn_err(CE_NOTE, | |
1423 | "Old superblock version %x, converting to %x.", | |
1424 | oldv, mp->m_sb.sb_versionnum); | |
1425 | #endif | |
1426 | } | |
1427 | if (flags & XFS_QMOPT_UQUOTA) | |
1428 | mp->m_sb.sb_uquotino = (*ip)->i_ino; | |
1429 | else | |
1430 | mp->m_sb.sb_gquotino = (*ip)->i_ino; | |
3685c2a1 | 1431 | spin_unlock(&mp->m_sb_lock); |
1da177e4 LT |
1432 | xfs_mod_sb(tp, sbfields); |
1433 | ||
1c72bf90 | 1434 | if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) { |
1da177e4 | 1435 | xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!"); |
014c2544 | 1436 | return error; |
1da177e4 | 1437 | } |
014c2544 | 1438 | return 0; |
1da177e4 LT |
1439 | } |
1440 | ||
1441 | ||
5b139738 | 1442 | STATIC void |
1da177e4 LT |
1443 | xfs_qm_reset_dqcounts( |
1444 | xfs_mount_t *mp, | |
1445 | xfs_buf_t *bp, | |
1446 | xfs_dqid_t id, | |
1447 | uint type) | |
1448 | { | |
1449 | xfs_disk_dquot_t *ddq; | |
1450 | int j; | |
1451 | ||
1452 | xfs_buftrace("RESET DQUOTS", bp); | |
1453 | /* | |
1454 | * Reset all counters and timers. They'll be | |
1455 | * started afresh by xfs_qm_quotacheck. | |
1456 | */ | |
1457 | #ifdef DEBUG | |
1458 | j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1459 | do_div(j, sizeof(xfs_dqblk_t)); | |
1460 | ASSERT(XFS_QM_DQPERBLK(mp) == j); | |
1461 | #endif | |
1462 | ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp); | |
1463 | for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) { | |
1464 | /* | |
1465 | * Do a sanity check, and if needed, repair the dqblk. Don't | |
1466 | * output any warnings because it's perfectly possible to | |
c41564b5 | 1467 | * find uninitialised dquot blks. See comment in xfs_qm_dqcheck. |
1da177e4 LT |
1468 | */ |
1469 | (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR, | |
1470 | "xfs_quotacheck"); | |
1149d96a CH |
1471 | ddq->d_bcount = 0; |
1472 | ddq->d_icount = 0; | |
1473 | ddq->d_rtbcount = 0; | |
1474 | ddq->d_btimer = 0; | |
1475 | ddq->d_itimer = 0; | |
1476 | ddq->d_rtbtimer = 0; | |
1477 | ddq->d_bwarns = 0; | |
1478 | ddq->d_iwarns = 0; | |
1479 | ddq->d_rtbwarns = 0; | |
1da177e4 LT |
1480 | ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1); |
1481 | } | |
1da177e4 LT |
1482 | } |
1483 | ||
1484 | STATIC int | |
1485 | xfs_qm_dqiter_bufs( | |
1486 | xfs_mount_t *mp, | |
1487 | xfs_dqid_t firstid, | |
1488 | xfs_fsblock_t bno, | |
1489 | xfs_filblks_t blkcnt, | |
1490 | uint flags) | |
1491 | { | |
1492 | xfs_buf_t *bp; | |
1493 | int error; | |
1494 | int notcommitted; | |
1495 | int incr; | |
c8ad20ff | 1496 | int type; |
1da177e4 LT |
1497 | |
1498 | ASSERT(blkcnt > 0); | |
1499 | notcommitted = 0; | |
1500 | incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ? | |
1501 | XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt; | |
c8ad20ff NS |
1502 | type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER : |
1503 | (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP); | |
1da177e4 LT |
1504 | error = 0; |
1505 | ||
1506 | /* | |
1507 | * Blkcnt arg can be a very big number, and might even be | |
1508 | * larger than the log itself. So, we have to break it up into | |
1509 | * manageable-sized transactions. | |
1510 | * Note that we don't start a permanent transaction here; we might | |
1511 | * not be able to get a log reservation for the whole thing up front, | |
1512 | * and we don't really care to either, because we just discard | |
1513 | * everything if we were to crash in the middle of this loop. | |
1514 | */ | |
1515 | while (blkcnt--) { | |
1516 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, | |
1517 | XFS_FSB_TO_DADDR(mp, bno), | |
1518 | (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp); | |
1519 | if (error) | |
1520 | break; | |
1521 | ||
5b139738 | 1522 | xfs_qm_reset_dqcounts(mp, bp, firstid, type); |
1da177e4 LT |
1523 | xfs_bdwrite(mp, bp); |
1524 | /* | |
1525 | * goto the next block. | |
1526 | */ | |
1527 | bno++; | |
1528 | firstid += XFS_QM_DQPERBLK(mp); | |
1529 | } | |
014c2544 | 1530 | return error; |
1da177e4 LT |
1531 | } |
1532 | ||
1533 | /* | |
c8ad20ff | 1534 | * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a |
1da177e4 LT |
1535 | * caller supplied function for every chunk of dquots that we find. |
1536 | */ | |
1537 | STATIC int | |
1538 | xfs_qm_dqiterate( | |
1539 | xfs_mount_t *mp, | |
1540 | xfs_inode_t *qip, | |
1541 | uint flags) | |
1542 | { | |
1543 | xfs_bmbt_irec_t *map; | |
1544 | int i, nmaps; /* number of map entries */ | |
1545 | int error; /* return value */ | |
1546 | xfs_fileoff_t lblkno; | |
1547 | xfs_filblks_t maxlblkcnt; | |
1548 | xfs_dqid_t firstid; | |
1549 | xfs_fsblock_t rablkno; | |
1550 | xfs_filblks_t rablkcnt; | |
1551 | ||
1552 | error = 0; | |
1553 | /* | |
c41564b5 | 1554 | * This looks racy, but we can't keep an inode lock across a |
1da177e4 LT |
1555 | * trans_reserve. But, this gets called during quotacheck, and that |
1556 | * happens only at mount time which is single threaded. | |
1557 | */ | |
1558 | if (qip->i_d.di_nblocks == 0) | |
014c2544 | 1559 | return 0; |
1da177e4 LT |
1560 | |
1561 | map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP); | |
1562 | ||
1563 | lblkno = 0; | |
1564 | maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); | |
1565 | do { | |
1566 | nmaps = XFS_DQITER_MAP_SIZE; | |
1567 | /* | |
1568 | * We aren't changing the inode itself. Just changing | |
1569 | * some of its data. No new blocks are added here, and | |
1570 | * the inode is never added to the transaction. | |
1571 | */ | |
1572 | xfs_ilock(qip, XFS_ILOCK_SHARED); | |
1573 | error = xfs_bmapi(NULL, qip, lblkno, | |
1574 | maxlblkcnt - lblkno, | |
1575 | XFS_BMAPI_METADATA, | |
1576 | NULL, | |
3e57ecf6 | 1577 | 0, map, &nmaps, NULL, NULL); |
1da177e4 LT |
1578 | xfs_iunlock(qip, XFS_ILOCK_SHARED); |
1579 | if (error) | |
1580 | break; | |
1581 | ||
1582 | ASSERT(nmaps <= XFS_DQITER_MAP_SIZE); | |
1583 | for (i = 0; i < nmaps; i++) { | |
1584 | ASSERT(map[i].br_startblock != DELAYSTARTBLOCK); | |
1585 | ASSERT(map[i].br_blockcount); | |
1586 | ||
1587 | ||
1588 | lblkno += map[i].br_blockcount; | |
1589 | ||
1590 | if (map[i].br_startblock == HOLESTARTBLOCK) | |
1591 | continue; | |
1592 | ||
1593 | firstid = (xfs_dqid_t) map[i].br_startoff * | |
1594 | XFS_QM_DQPERBLK(mp); | |
1595 | /* | |
1596 | * Do a read-ahead on the next extent. | |
1597 | */ | |
1598 | if ((i+1 < nmaps) && | |
1599 | (map[i+1].br_startblock != HOLESTARTBLOCK)) { | |
1600 | rablkcnt = map[i+1].br_blockcount; | |
1601 | rablkno = map[i+1].br_startblock; | |
1602 | while (rablkcnt--) { | |
1603 | xfs_baread(mp->m_ddev_targp, | |
1604 | XFS_FSB_TO_DADDR(mp, rablkno), | |
1605 | (int)XFS_QI_DQCHUNKLEN(mp)); | |
1606 | rablkno++; | |
1607 | } | |
1608 | } | |
1609 | /* | |
1610 | * Iterate thru all the blks in the extent and | |
1611 | * reset the counters of all the dquots inside them. | |
1612 | */ | |
1613 | if ((error = xfs_qm_dqiter_bufs(mp, | |
1614 | firstid, | |
1615 | map[i].br_startblock, | |
1616 | map[i].br_blockcount, | |
1617 | flags))) { | |
1618 | break; | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | if (error) | |
1623 | break; | |
1624 | } while (nmaps > 0); | |
1625 | ||
1626 | kmem_free(map, XFS_DQITER_MAP_SIZE * sizeof(*map)); | |
1627 | ||
014c2544 | 1628 | return error; |
1da177e4 LT |
1629 | } |
1630 | ||
1631 | /* | |
1632 | * Called by dqusage_adjust in doing a quotacheck. | |
1633 | * Given the inode, and a dquot (either USR or GRP, doesn't matter), | |
1634 | * this updates its incore copy as well as the buffer copy. This is | |
1635 | * so that once the quotacheck is done, we can just log all the buffers, | |
1636 | * as opposed to logging numerous updates to individual dquots. | |
1637 | */ | |
1638 | STATIC void | |
1639 | xfs_qm_quotacheck_dqadjust( | |
1640 | xfs_dquot_t *dqp, | |
1641 | xfs_qcnt_t nblks, | |
1642 | xfs_qcnt_t rtblks) | |
1643 | { | |
1644 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
1645 | xfs_dqtrace_entry(dqp, "QCHECK DQADJUST"); | |
1646 | /* | |
1647 | * Adjust the inode count and the block count to reflect this inode's | |
1648 | * resource usage. | |
1649 | */ | |
413d57c9 | 1650 | be64_add_cpu(&dqp->q_core.d_icount, 1); |
1da177e4 LT |
1651 | dqp->q_res_icount++; |
1652 | if (nblks) { | |
413d57c9 | 1653 | be64_add_cpu(&dqp->q_core.d_bcount, nblks); |
1da177e4 LT |
1654 | dqp->q_res_bcount += nblks; |
1655 | } | |
1656 | if (rtblks) { | |
413d57c9 | 1657 | be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks); |
1da177e4 LT |
1658 | dqp->q_res_rtbcount += rtblks; |
1659 | } | |
1660 | ||
1661 | /* | |
1662 | * Set default limits, adjust timers (since we changed usages) | |
1663 | */ | |
1664 | if (! XFS_IS_SUSER_DQUOT(dqp)) { | |
1665 | xfs_qm_adjust_dqlimits(dqp->q_mount, &dqp->q_core); | |
1666 | xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core); | |
1667 | } | |
1668 | ||
1669 | dqp->dq_flags |= XFS_DQ_DIRTY; | |
1670 | } | |
1671 | ||
1672 | STATIC int | |
1673 | xfs_qm_get_rtblks( | |
1674 | xfs_inode_t *ip, | |
1675 | xfs_qcnt_t *O_rtblks) | |
1676 | { | |
1677 | xfs_filblks_t rtblks; /* total rt blks */ | |
4eea22f0 | 1678 | xfs_extnum_t idx; /* extent record index */ |
1da177e4 LT |
1679 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1680 | xfs_extnum_t nextents; /* number of extent entries */ | |
1da177e4 LT |
1681 | int error; |
1682 | ||
1683 | ASSERT(XFS_IS_REALTIME_INODE(ip)); | |
1684 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
1685 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1686 | if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK))) | |
014c2544 | 1687 | return error; |
1da177e4 LT |
1688 | } |
1689 | rtblks = 0; | |
4eea22f0 | 1690 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
a6f64d4a CH |
1691 | for (idx = 0; idx < nextents; idx++) |
1692 | rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx)); | |
1da177e4 | 1693 | *O_rtblks = (xfs_qcnt_t)rtblks; |
014c2544 | 1694 | return 0; |
1da177e4 LT |
1695 | } |
1696 | ||
1697 | /* | |
1698 | * callback routine supplied to bulkstat(). Given an inumber, find its | |
1699 | * dquots and update them to account for resources taken by that inode. | |
1700 | */ | |
1701 | /* ARGSUSED */ | |
1702 | STATIC int | |
1703 | xfs_qm_dqusage_adjust( | |
1704 | xfs_mount_t *mp, /* mount point for filesystem */ | |
1705 | xfs_ino_t ino, /* inode number to get data for */ | |
1706 | void __user *buffer, /* not used */ | |
1707 | int ubsize, /* not used */ | |
1708 | void *private_data, /* not used */ | |
1709 | xfs_daddr_t bno, /* starting block of inode cluster */ | |
1710 | int *ubused, /* not used */ | |
1711 | void *dip, /* on-disk inode pointer (not used) */ | |
1712 | int *res) /* result code value */ | |
1713 | { | |
1714 | xfs_inode_t *ip; | |
1715 | xfs_dquot_t *udqp, *gdqp; | |
1716 | xfs_qcnt_t nblks, rtblks; | |
1717 | int error; | |
1718 | ||
1719 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1720 | ||
1721 | /* | |
1722 | * rootino must have its resources accounted for, not so with the quota | |
1723 | * inodes. | |
1724 | */ | |
1725 | if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) { | |
1726 | *res = BULKSTAT_RV_NOTHING; | |
1727 | return XFS_ERROR(EINVAL); | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget | |
1732 | * interface expects the inode to be exclusively locked because that's | |
1733 | * the case in all other instances. It's OK that we do this because | |
1734 | * quotacheck is done only at mount time. | |
1735 | */ | |
1736 | if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) { | |
1737 | *res = BULKSTAT_RV_NOTHING; | |
014c2544 | 1738 | return error; |
1da177e4 LT |
1739 | } |
1740 | ||
1da177e4 LT |
1741 | /* |
1742 | * Obtain the locked dquots. In case of an error (eg. allocation | |
1743 | * fails for ENOSPC), we return the negative of the error number | |
1744 | * to bulkstat, so that it can get propagated to quotacheck() and | |
1745 | * making us disable quotas for the file system. | |
1746 | */ | |
1747 | if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) { | |
1748 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1749 | *res = BULKSTAT_RV_GIVEUP; | |
014c2544 | 1750 | return error; |
1da177e4 LT |
1751 | } |
1752 | ||
1753 | rtblks = 0; | |
1754 | if (! XFS_IS_REALTIME_INODE(ip)) { | |
1755 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks; | |
1756 | } else { | |
1757 | /* | |
1758 | * Walk thru the extent list and count the realtime blocks. | |
1759 | */ | |
1760 | if ((error = xfs_qm_get_rtblks(ip, &rtblks))) { | |
1761 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1762 | if (udqp) | |
1763 | xfs_qm_dqput(udqp); | |
1764 | if (gdqp) | |
1765 | xfs_qm_dqput(gdqp); | |
1766 | *res = BULKSTAT_RV_GIVEUP; | |
014c2544 | 1767 | return error; |
1da177e4 LT |
1768 | } |
1769 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks; | |
1770 | } | |
1771 | ASSERT(ip->i_delayed_blks == 0); | |
1772 | ||
1773 | /* | |
1774 | * We can't release the inode while holding its dquot locks. | |
1775 | * The inode can go into inactive and might try to acquire the dquotlocks. | |
1776 | * So, just unlock here and do a vn_rele at the end. | |
1777 | */ | |
1778 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1779 | ||
1780 | /* | |
1781 | * Add the (disk blocks and inode) resources occupied by this | |
1782 | * inode to its dquots. We do this adjustment in the incore dquot, | |
1783 | * and also copy the changes to its buffer. | |
1784 | * We don't care about putting these changes in a transaction | |
1785 | * envelope because if we crash in the middle of a 'quotacheck' | |
1786 | * we have to start from the beginning anyway. | |
1787 | * Once we're done, we'll log all the dquot bufs. | |
1788 | * | |
c41564b5 | 1789 | * The *QUOTA_ON checks below may look pretty racy, but quotachecks |
1da177e4 LT |
1790 | * and quotaoffs don't race. (Quotachecks happen at mount time only). |
1791 | */ | |
1792 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1793 | ASSERT(udqp); | |
1794 | xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks); | |
1795 | xfs_qm_dqput(udqp); | |
1796 | } | |
c8ad20ff | 1797 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1798 | ASSERT(gdqp); |
1799 | xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks); | |
1800 | xfs_qm_dqput(gdqp); | |
1801 | } | |
1802 | /* | |
1803 | * Now release the inode. This will send it to 'inactive', and | |
1804 | * possibly even free blocks. | |
1805 | */ | |
43355099 | 1806 | IRELE(ip); |
1da177e4 LT |
1807 | |
1808 | /* | |
1809 | * Goto next inode. | |
1810 | */ | |
1811 | *res = BULKSTAT_RV_DIDONE; | |
014c2544 | 1812 | return 0; |
1da177e4 LT |
1813 | } |
1814 | ||
1815 | /* | |
1816 | * Walk thru all the filesystem inodes and construct a consistent view | |
1817 | * of the disk quota world. If the quotacheck fails, disable quotas. | |
1818 | */ | |
1819 | int | |
1820 | xfs_qm_quotacheck( | |
1821 | xfs_mount_t *mp) | |
1822 | { | |
1823 | int done, count, error; | |
1824 | xfs_ino_t lastino; | |
1825 | size_t structsz; | |
1826 | xfs_inode_t *uip, *gip; | |
1827 | uint flags; | |
1828 | ||
1829 | count = INT_MAX; | |
1830 | structsz = 1; | |
1831 | lastino = 0; | |
1832 | flags = 0; | |
1833 | ||
1834 | ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp)); | |
1835 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1836 | ||
1837 | /* | |
1838 | * There should be no cached dquots. The (simplistic) quotacheck | |
1839 | * algorithm doesn't like that. | |
1840 | */ | |
1841 | ASSERT(XFS_QI_MPLNDQUOTS(mp) == 0); | |
1842 | ||
1843 | cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname); | |
1844 | ||
1845 | /* | |
c8ad20ff | 1846 | * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset |
1da177e4 LT |
1847 | * their counters to zero. We need a clean slate. |
1848 | * We don't log our changes till later. | |
1849 | */ | |
1850 | if ((uip = XFS_QI_UQIP(mp))) { | |
1851 | if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA))) | |
1852 | goto error_return; | |
1853 | flags |= XFS_UQUOTA_CHKD; | |
1854 | } | |
1855 | ||
1856 | if ((gip = XFS_QI_GQIP(mp))) { | |
c8ad20ff NS |
1857 | if ((error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ? |
1858 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA))) | |
1da177e4 | 1859 | goto error_return; |
c8ad20ff | 1860 | flags |= XFS_OQUOTA_CHKD; |
1da177e4 LT |
1861 | } |
1862 | ||
1863 | do { | |
1864 | /* | |
1865 | * Iterate thru all the inodes in the file system, | |
1866 | * adjusting the corresponding dquot counters in core. | |
1867 | */ | |
1868 | if ((error = xfs_bulkstat(mp, &lastino, &count, | |
1869 | xfs_qm_dqusage_adjust, NULL, | |
9c48876a | 1870 | structsz, NULL, BULKSTAT_FG_IGET, &done))) |
1da177e4 LT |
1871 | break; |
1872 | ||
1873 | } while (! done); | |
1874 | ||
4b8879df DC |
1875 | /* |
1876 | * We've made all the changes that we need to make incore. | |
1877 | * Flush them down to disk buffers if everything was updated | |
1878 | * successfully. | |
1879 | */ | |
1880 | if (!error) | |
1881 | error = xfs_qm_dqflush_all(mp, XFS_QMOPT_DELWRI); | |
1882 | ||
1da177e4 LT |
1883 | /* |
1884 | * We can get this error if we couldn't do a dquot allocation inside | |
1885 | * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the | |
1886 | * dirty dquots that might be cached, we just want to get rid of them | |
1887 | * and turn quotaoff. The dquots won't be attached to any of the inodes | |
1888 | * at this point (because we intentionally didn't in dqget_noattach). | |
1889 | */ | |
1890 | if (error) { | |
ee2a4f7c | 1891 | xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_QUOTAOFF); |
1da177e4 LT |
1892 | goto error_return; |
1893 | } | |
1da177e4 LT |
1894 | |
1895 | /* | |
1896 | * We didn't log anything, because if we crashed, we'll have to | |
1897 | * start the quotacheck from scratch anyway. However, we must make | |
1898 | * sure that our dquot changes are secure before we put the | |
1899 | * quotacheck'd stamp on the superblock. So, here we do a synchronous | |
1900 | * flush. | |
1901 | */ | |
1902 | XFS_bflush(mp->m_ddev_targp); | |
1903 | ||
1904 | /* | |
1905 | * If one type of quotas is off, then it will lose its | |
1906 | * quotachecked status, since we won't be doing accounting for | |
1907 | * that type anymore. | |
1908 | */ | |
c8ad20ff | 1909 | mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD); |
1da177e4 LT |
1910 | mp->m_qflags |= flags; |
1911 | ||
1912 | XQM_LIST_PRINT(&(XFS_QI_MPL_LIST(mp)), MPL_NEXT, "++++ Mp list +++"); | |
1913 | ||
1914 | error_return: | |
1915 | if (error) { | |
1916 | cmn_err(CE_WARN, "XFS quotacheck %s: Unsuccessful (Error %d): " | |
1917 | "Disabling quotas.", | |
1918 | mp->m_fsname, error); | |
1919 | /* | |
1920 | * We must turn off quotas. | |
1921 | */ | |
1922 | ASSERT(mp->m_quotainfo != NULL); | |
1923 | ASSERT(xfs_Gqm != NULL); | |
1924 | xfs_qm_destroy_quotainfo(mp); | |
31d5577b DC |
1925 | if (xfs_mount_reset_sbqflags(mp)) { |
1926 | cmn_err(CE_WARN, "XFS quotacheck %s: " | |
1927 | "Failed to reset quota flags.", mp->m_fsname); | |
1928 | } | |
1da177e4 LT |
1929 | } else { |
1930 | cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname); | |
1931 | } | |
1932 | return (error); | |
1933 | } | |
1934 | ||
1935 | /* | |
1936 | * This is called after the superblock has been read in and we're ready to | |
1937 | * iget the quota inodes. | |
1938 | */ | |
1939 | STATIC int | |
1940 | xfs_qm_init_quotainos( | |
1941 | xfs_mount_t *mp) | |
1942 | { | |
1943 | xfs_inode_t *uip, *gip; | |
1944 | int error; | |
1945 | __int64_t sbflags; | |
1946 | uint flags; | |
1947 | ||
1948 | ASSERT(mp->m_quotainfo); | |
1949 | uip = gip = NULL; | |
1950 | sbflags = 0; | |
1951 | flags = 0; | |
1952 | ||
1953 | /* | |
1954 | * Get the uquota and gquota inodes | |
1955 | */ | |
62118709 | 1956 | if (xfs_sb_version_hasquota(&mp->m_sb)) { |
1da177e4 LT |
1957 | if (XFS_IS_UQUOTA_ON(mp) && |
1958 | mp->m_sb.sb_uquotino != NULLFSINO) { | |
1959 | ASSERT(mp->m_sb.sb_uquotino > 0); | |
1960 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, | |
1961 | 0, 0, &uip, 0))) | |
1962 | return XFS_ERROR(error); | |
1963 | } | |
c8ad20ff | 1964 | if (XFS_IS_OQUOTA_ON(mp) && |
1da177e4 LT |
1965 | mp->m_sb.sb_gquotino != NULLFSINO) { |
1966 | ASSERT(mp->m_sb.sb_gquotino > 0); | |
1967 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, | |
1968 | 0, 0, &gip, 0))) { | |
1969 | if (uip) | |
43355099 | 1970 | IRELE(uip); |
1da177e4 LT |
1971 | return XFS_ERROR(error); |
1972 | } | |
1973 | } | |
1974 | } else { | |
1975 | flags |= XFS_QMOPT_SBVERSION; | |
1976 | sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1977 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS); | |
1978 | } | |
1979 | ||
1980 | /* | |
1981 | * Create the two inodes, if they don't exist already. The changes | |
1982 | * made above will get added to a transaction and logged in one of | |
1983 | * the qino_alloc calls below. If the device is readonly, | |
1984 | * temporarily switch to read-write to do this. | |
1985 | */ | |
1986 | if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) { | |
1987 | if ((error = xfs_qm_qino_alloc(mp, &uip, | |
1988 | sbflags | XFS_SB_UQUOTINO, | |
1989 | flags | XFS_QMOPT_UQUOTA))) | |
1990 | return XFS_ERROR(error); | |
1991 | ||
1992 | flags &= ~XFS_QMOPT_SBVERSION; | |
1993 | } | |
c8ad20ff NS |
1994 | if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) { |
1995 | flags |= (XFS_IS_GQUOTA_ON(mp) ? | |
1996 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA); | |
1997 | error = xfs_qm_qino_alloc(mp, &gip, | |
1998 | sbflags | XFS_SB_GQUOTINO, flags); | |
1999 | if (error) { | |
1da177e4 | 2000 | if (uip) |
43355099 | 2001 | IRELE(uip); |
1da177e4 LT |
2002 | |
2003 | return XFS_ERROR(error); | |
2004 | } | |
2005 | } | |
2006 | ||
2007 | XFS_QI_UQIP(mp) = uip; | |
2008 | XFS_QI_GQIP(mp) = gip; | |
2009 | ||
014c2544 | 2010 | return 0; |
1da177e4 LT |
2011 | } |
2012 | ||
2013 | ||
2014 | /* | |
2015 | * Traverse the freelist of dquots and attempt to reclaim a maximum of | |
2016 | * 'howmany' dquots. This operation races with dqlookup(), and attempts to | |
2017 | * favor the lookup function ... | |
2018 | * XXXsup merge this with qm_reclaim_one(). | |
2019 | */ | |
2020 | STATIC int | |
2021 | xfs_qm_shake_freelist( | |
2022 | int howmany) | |
2023 | { | |
2024 | int nreclaimed; | |
2025 | xfs_dqhash_t *hash; | |
2026 | xfs_dquot_t *dqp, *nextdqp; | |
2027 | int restarts; | |
2028 | int nflushes; | |
2029 | ||
2030 | if (howmany <= 0) | |
014c2544 | 2031 | return 0; |
1da177e4 LT |
2032 | |
2033 | nreclaimed = 0; | |
2034 | restarts = 0; | |
2035 | nflushes = 0; | |
2036 | ||
2037 | #ifdef QUOTADEBUG | |
2038 | cmn_err(CE_DEBUG, "Shake free 0x%x", howmany); | |
2039 | #endif | |
2040 | /* lock order is : hashchainlock, freelistlock, mplistlock */ | |
2041 | tryagain: | |
2042 | xfs_qm_freelist_lock(xfs_Gqm); | |
2043 | ||
2044 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
2045 | ((dqp != (xfs_dquot_t *) &xfs_Gqm->qm_dqfreelist) && | |
2046 | nreclaimed < howmany); ) { | |
2047 | xfs_dqlock(dqp); | |
2048 | ||
2049 | /* | |
2050 | * We are racing with dqlookup here. Naturally we don't | |
2051 | * want to reclaim a dquot that lookup wants. | |
2052 | */ | |
2053 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
2054 | xfs_dqunlock(dqp); | |
2055 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2056 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 2057 | return nreclaimed; |
1da177e4 LT |
2058 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); |
2059 | goto tryagain; | |
2060 | } | |
2061 | ||
2062 | /* | |
2063 | * If the dquot is inactive, we are assured that it is | |
2064 | * not on the mplist or the hashlist, and that makes our | |
2065 | * life easier. | |
2066 | */ | |
2067 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
2068 | ASSERT(dqp->q_mount == NULL); | |
2069 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
2070 | ASSERT(dqp->HL_PREVP == NULL); | |
2071 | ASSERT(dqp->MPL_PREVP == NULL); | |
2072 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); | |
2073 | nextdqp = dqp->dq_flnext; | |
2074 | goto off_freelist; | |
2075 | } | |
2076 | ||
2077 | ASSERT(dqp->MPL_PREVP); | |
2078 | /* | |
2079 | * Try to grab the flush lock. If this dquot is in the process of | |
2080 | * getting flushed to disk, we don't want to reclaim it. | |
2081 | */ | |
2082 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
2083 | xfs_dqunlock(dqp); | |
2084 | dqp = dqp->dq_flnext; | |
2085 | continue; | |
2086 | } | |
2087 | ||
2088 | /* | |
2089 | * We have the flush lock so we know that this is not in the | |
2090 | * process of being flushed. So, if this is dirty, flush it | |
2091 | * DELWRI so that we don't get a freelist infested with | |
2092 | * dirty dquots. | |
2093 | */ | |
2094 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
3c56836f | 2095 | int error; |
1da177e4 LT |
2096 | xfs_dqtrace_entry(dqp, "DQSHAKE: DQDIRTY"); |
2097 | /* | |
2098 | * We flush it delayed write, so don't bother | |
2099 | * releasing the mplock. | |
2100 | */ | |
3c56836f DC |
2101 | error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); |
2102 | if (error) { | |
2103 | xfs_fs_cmn_err(CE_WARN, dqp->q_mount, | |
2104 | "xfs_qm_dqflush_all: dquot %p flush failed", dqp); | |
2105 | } | |
1da177e4 LT |
2106 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ |
2107 | dqp = dqp->dq_flnext; | |
2108 | continue; | |
2109 | } | |
2110 | /* | |
2111 | * We're trying to get the hashlock out of order. This races | |
2112 | * with dqlookup; so, we giveup and goto the next dquot if | |
2113 | * we couldn't get the hashlock. This way, we won't starve | |
2114 | * a dqlookup process that holds the hashlock that is | |
2115 | * waiting for the freelist lock. | |
2116 | */ | |
2117 | if (! xfs_qm_dqhashlock_nowait(dqp)) { | |
2118 | xfs_dqfunlock(dqp); | |
2119 | xfs_dqunlock(dqp); | |
2120 | dqp = dqp->dq_flnext; | |
2121 | continue; | |
2122 | } | |
2123 | /* | |
2124 | * This races with dquot allocation code as well as dqflush_all | |
2125 | * and reclaim code. So, if we failed to grab the mplist lock, | |
2126 | * giveup everything and start over. | |
2127 | */ | |
2128 | hash = dqp->q_hash; | |
2129 | ASSERT(hash); | |
2130 | if (! xfs_qm_mplist_nowait(dqp->q_mount)) { | |
2131 | /* XXX put a sentinel so that we can come back here */ | |
2132 | xfs_dqfunlock(dqp); | |
2133 | xfs_dqunlock(dqp); | |
2134 | XFS_DQ_HASH_UNLOCK(hash); | |
2135 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2136 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 2137 | return nreclaimed; |
1da177e4 LT |
2138 | goto tryagain; |
2139 | } | |
2140 | xfs_dqtrace_entry(dqp, "DQSHAKE: UNLINKING"); | |
2141 | #ifdef QUOTADEBUG | |
2142 | cmn_err(CE_DEBUG, "Shake 0x%p, ID 0x%x\n", | |
1149d96a | 2143 | dqp, be32_to_cpu(dqp->q_core.d_id)); |
1da177e4 LT |
2144 | #endif |
2145 | ASSERT(dqp->q_nrefs == 0); | |
2146 | nextdqp = dqp->dq_flnext; | |
2147 | XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp); | |
2148 | XQM_HASHLIST_REMOVE(hash, dqp); | |
2149 | xfs_dqfunlock(dqp); | |
2150 | xfs_qm_mplist_unlock(dqp->q_mount); | |
2151 | XFS_DQ_HASH_UNLOCK(hash); | |
2152 | ||
2153 | off_freelist: | |
2154 | XQM_FREELIST_REMOVE(dqp); | |
2155 | xfs_dqunlock(dqp); | |
2156 | nreclaimed++; | |
2157 | XQM_STATS_INC(xqmstats.xs_qm_dqshake_reclaims); | |
2158 | xfs_qm_dqdestroy(dqp); | |
2159 | dqp = nextdqp; | |
2160 | } | |
2161 | xfs_qm_freelist_unlock(xfs_Gqm); | |
014c2544 | 2162 | return nreclaimed; |
1da177e4 LT |
2163 | } |
2164 | ||
2165 | ||
2166 | /* | |
2167 | * The kmem_shake interface is invoked when memory is running low. | |
2168 | */ | |
2169 | /* ARGSUSED */ | |
2170 | STATIC int | |
51bfb75b | 2171 | xfs_qm_shake(int nr_to_scan, gfp_t gfp_mask) |
1da177e4 LT |
2172 | { |
2173 | int ndqused, nfree, n; | |
2174 | ||
2175 | if (!kmem_shake_allow(gfp_mask)) | |
014c2544 | 2176 | return 0; |
1da177e4 | 2177 | if (!xfs_Gqm) |
014c2544 | 2178 | return 0; |
1da177e4 LT |
2179 | |
2180 | nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */ | |
2181 | /* incore dquots in all f/s's */ | |
2182 | ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree; | |
2183 | ||
2184 | ASSERT(ndqused >= 0); | |
2185 | ||
2186 | if (nfree <= ndqused && nfree < ndquot) | |
014c2544 | 2187 | return 0; |
1da177e4 LT |
2188 | |
2189 | ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */ | |
2190 | n = nfree - ndqused - ndquot; /* # over target */ | |
2191 | ||
2192 | return xfs_qm_shake_freelist(MAX(nfree, n)); | |
2193 | } | |
2194 | ||
2195 | ||
2196 | /* | |
2197 | * Just pop the least recently used dquot off the freelist and | |
2198 | * recycle it. The returned dquot is locked. | |
2199 | */ | |
2200 | STATIC xfs_dquot_t * | |
2201 | xfs_qm_dqreclaim_one(void) | |
2202 | { | |
2203 | xfs_dquot_t *dqpout; | |
2204 | xfs_dquot_t *dqp; | |
2205 | int restarts; | |
2206 | int nflushes; | |
2207 | ||
2208 | restarts = 0; | |
2209 | dqpout = NULL; | |
2210 | nflushes = 0; | |
2211 | ||
2212 | /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */ | |
2213 | startagain: | |
2214 | xfs_qm_freelist_lock(xfs_Gqm); | |
2215 | ||
2216 | FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) { | |
2217 | xfs_dqlock(dqp); | |
2218 | ||
2219 | /* | |
2220 | * We are racing with dqlookup here. Naturally we don't | |
2221 | * want to reclaim a dquot that lookup wants. We release the | |
2222 | * freelist lock and start over, so that lookup will grab | |
2223 | * both the dquot and the freelistlock. | |
2224 | */ | |
2225 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
2226 | ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE)); | |
2227 | xfs_dqtrace_entry(dqp, "DQRECLAIM: DQWANT"); | |
2228 | xfs_dqunlock(dqp); | |
2229 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2230 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 2231 | return NULL; |
1da177e4 LT |
2232 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); |
2233 | goto startagain; | |
2234 | } | |
2235 | ||
2236 | /* | |
2237 | * If the dquot is inactive, we are assured that it is | |
2238 | * not on the mplist or the hashlist, and that makes our | |
2239 | * life easier. | |
2240 | */ | |
2241 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
2242 | ASSERT(dqp->q_mount == NULL); | |
2243 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
2244 | ASSERT(dqp->HL_PREVP == NULL); | |
2245 | ASSERT(dqp->MPL_PREVP == NULL); | |
2246 | XQM_FREELIST_REMOVE(dqp); | |
2247 | xfs_dqunlock(dqp); | |
2248 | dqpout = dqp; | |
2249 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); | |
2250 | break; | |
2251 | } | |
2252 | ||
2253 | ASSERT(dqp->q_hash); | |
2254 | ASSERT(dqp->MPL_PREVP); | |
2255 | ||
2256 | /* | |
2257 | * Try to grab the flush lock. If this dquot is in the process of | |
2258 | * getting flushed to disk, we don't want to reclaim it. | |
2259 | */ | |
2260 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
2261 | xfs_dqunlock(dqp); | |
2262 | continue; | |
2263 | } | |
2264 | ||
2265 | /* | |
2266 | * We have the flush lock so we know that this is not in the | |
2267 | * process of being flushed. So, if this is dirty, flush it | |
2268 | * DELWRI so that we don't get a freelist infested with | |
2269 | * dirty dquots. | |
2270 | */ | |
2271 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
3c56836f | 2272 | int error; |
1da177e4 LT |
2273 | xfs_dqtrace_entry(dqp, "DQRECLAIM: DQDIRTY"); |
2274 | /* | |
2275 | * We flush it delayed write, so don't bother | |
2276 | * releasing the freelist lock. | |
2277 | */ | |
3c56836f DC |
2278 | error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); |
2279 | if (error) { | |
2280 | xfs_fs_cmn_err(CE_WARN, dqp->q_mount, | |
2281 | "xfs_qm_dqreclaim: dquot %p flush failed", dqp); | |
2282 | } | |
1da177e4 LT |
2283 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ |
2284 | continue; | |
2285 | } | |
2286 | ||
2287 | if (! xfs_qm_mplist_nowait(dqp->q_mount)) { | |
2288 | xfs_dqfunlock(dqp); | |
2289 | xfs_dqunlock(dqp); | |
2290 | continue; | |
2291 | } | |
2292 | ||
2293 | if (! xfs_qm_dqhashlock_nowait(dqp)) | |
2294 | goto mplistunlock; | |
2295 | ||
2296 | ASSERT(dqp->q_nrefs == 0); | |
2297 | xfs_dqtrace_entry(dqp, "DQRECLAIM: UNLINKING"); | |
2298 | XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp); | |
2299 | XQM_HASHLIST_REMOVE(dqp->q_hash, dqp); | |
2300 | XQM_FREELIST_REMOVE(dqp); | |
2301 | dqpout = dqp; | |
2302 | XFS_DQ_HASH_UNLOCK(dqp->q_hash); | |
2303 | mplistunlock: | |
2304 | xfs_qm_mplist_unlock(dqp->q_mount); | |
2305 | xfs_dqfunlock(dqp); | |
2306 | xfs_dqunlock(dqp); | |
2307 | if (dqpout) | |
2308 | break; | |
2309 | } | |
2310 | ||
2311 | xfs_qm_freelist_unlock(xfs_Gqm); | |
014c2544 | 2312 | return dqpout; |
1da177e4 LT |
2313 | } |
2314 | ||
2315 | ||
2316 | /*------------------------------------------------------------------*/ | |
2317 | ||
2318 | /* | |
2319 | * Return a new incore dquot. Depending on the number of | |
2320 | * dquots in the system, we either allocate a new one on the kernel heap, | |
2321 | * or reclaim a free one. | |
2322 | * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed | |
2323 | * to reclaim an existing one from the freelist. | |
2324 | */ | |
2325 | boolean_t | |
2326 | xfs_qm_dqalloc_incore( | |
2327 | xfs_dquot_t **O_dqpp) | |
2328 | { | |
2329 | xfs_dquot_t *dqp; | |
2330 | ||
2331 | /* | |
2332 | * Check against high water mark to see if we want to pop | |
2333 | * a nincompoop dquot off the freelist. | |
2334 | */ | |
2335 | if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) { | |
2336 | /* | |
2337 | * Try to recycle a dquot from the freelist. | |
2338 | */ | |
2339 | if ((dqp = xfs_qm_dqreclaim_one())) { | |
2340 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaims); | |
2341 | /* | |
2342 | * Just zero the core here. The rest will get | |
2343 | * reinitialized by caller. XXX we shouldn't even | |
2344 | * do this zero ... | |
2345 | */ | |
2346 | memset(&dqp->q_core, 0, sizeof(dqp->q_core)); | |
2347 | *O_dqpp = dqp; | |
014c2544 | 2348 | return B_FALSE; |
1da177e4 LT |
2349 | } |
2350 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses); | |
2351 | } | |
2352 | ||
2353 | /* | |
2354 | * Allocate a brand new dquot on the kernel heap and return it | |
2355 | * to the caller to initialize. | |
2356 | */ | |
2357 | ASSERT(xfs_Gqm->qm_dqzone != NULL); | |
2358 | *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP); | |
2359 | atomic_inc(&xfs_Gqm->qm_totaldquots); | |
2360 | ||
014c2544 | 2361 | return B_TRUE; |
1da177e4 LT |
2362 | } |
2363 | ||
2364 | ||
2365 | /* | |
2366 | * Start a transaction and write the incore superblock changes to | |
2367 | * disk. flags parameter indicates which fields have changed. | |
2368 | */ | |
2369 | int | |
2370 | xfs_qm_write_sb_changes( | |
2371 | xfs_mount_t *mp, | |
2372 | __int64_t flags) | |
2373 | { | |
2374 | xfs_trans_t *tp; | |
2375 | int error; | |
2376 | ||
2377 | #ifdef QUOTADEBUG | |
2378 | cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname); | |
2379 | #endif | |
2380 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE); | |
2381 | if ((error = xfs_trans_reserve(tp, 0, | |
2382 | mp->m_sb.sb_sectsize + 128, 0, | |
2383 | 0, | |
2384 | XFS_DEFAULT_LOG_COUNT))) { | |
2385 | xfs_trans_cancel(tp, 0); | |
014c2544 | 2386 | return error; |
1da177e4 LT |
2387 | } |
2388 | ||
2389 | xfs_mod_sb(tp, flags); | |
e5720eec | 2390 | error = xfs_trans_commit(tp, 0); |
1da177e4 | 2391 | |
e5720eec | 2392 | return error; |
1da177e4 LT |
2393 | } |
2394 | ||
2395 | ||
2396 | /* --------------- utility functions for vnodeops ---------------- */ | |
2397 | ||
2398 | ||
2399 | /* | |
2400 | * Given an inode, a uid and gid (from cred_t) make sure that we have | |
2401 | * allocated relevant dquot(s) on disk, and that we won't exceed inode | |
2402 | * quotas by creating this file. | |
2403 | * This also attaches dquot(s) to the given inode after locking it, | |
2404 | * and returns the dquots corresponding to the uid and/or gid. | |
2405 | * | |
2406 | * in : inode (unlocked) | |
2407 | * out : udquot, gdquot with references taken and unlocked | |
2408 | */ | |
2409 | int | |
2410 | xfs_qm_vop_dqalloc( | |
2411 | xfs_mount_t *mp, | |
2412 | xfs_inode_t *ip, | |
2413 | uid_t uid, | |
2414 | gid_t gid, | |
c8ad20ff | 2415 | prid_t prid, |
1da177e4 LT |
2416 | uint flags, |
2417 | xfs_dquot_t **O_udqpp, | |
2418 | xfs_dquot_t **O_gdqpp) | |
2419 | { | |
2420 | int error; | |
2421 | xfs_dquot_t *uq, *gq; | |
2422 | uint lockflags; | |
2423 | ||
2424 | if (!XFS_IS_QUOTA_ON(mp)) | |
2425 | return 0; | |
2426 | ||
2427 | lockflags = XFS_ILOCK_EXCL; | |
2428 | xfs_ilock(ip, lockflags); | |
2429 | ||
bd186aa9 | 2430 | if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip)) |
1da177e4 LT |
2431 | gid = ip->i_d.di_gid; |
2432 | ||
2433 | /* | |
2434 | * Attach the dquot(s) to this inode, doing a dquot allocation | |
2435 | * if necessary. The dquot(s) will not be locked. | |
2436 | */ | |
2437 | if (XFS_NOT_DQATTACHED(mp, ip)) { | |
2438 | if ((error = xfs_qm_dqattach(ip, XFS_QMOPT_DQALLOC | | |
2439 | XFS_QMOPT_ILOCKED))) { | |
2440 | xfs_iunlock(ip, lockflags); | |
014c2544 | 2441 | return error; |
1da177e4 LT |
2442 | } |
2443 | } | |
2444 | ||
2445 | uq = gq = NULL; | |
c8ad20ff | 2446 | if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) { |
1da177e4 LT |
2447 | if (ip->i_d.di_uid != uid) { |
2448 | /* | |
2449 | * What we need is the dquot that has this uid, and | |
2450 | * if we send the inode to dqget, the uid of the inode | |
2451 | * takes priority over what's sent in the uid argument. | |
2452 | * We must unlock inode here before calling dqget if | |
2453 | * we're not sending the inode, because otherwise | |
2454 | * we'll deadlock by doing trans_reserve while | |
2455 | * holding ilock. | |
2456 | */ | |
2457 | xfs_iunlock(ip, lockflags); | |
2458 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid, | |
2459 | XFS_DQ_USER, | |
2460 | XFS_QMOPT_DQALLOC | | |
2461 | XFS_QMOPT_DOWARN, | |
2462 | &uq))) { | |
2463 | ASSERT(error != ENOENT); | |
014c2544 | 2464 | return error; |
1da177e4 LT |
2465 | } |
2466 | /* | |
2467 | * Get the ilock in the right order. | |
2468 | */ | |
2469 | xfs_dqunlock(uq); | |
2470 | lockflags = XFS_ILOCK_SHARED; | |
2471 | xfs_ilock(ip, lockflags); | |
2472 | } else { | |
2473 | /* | |
2474 | * Take an extra reference, because we'll return | |
2475 | * this to caller | |
2476 | */ | |
2477 | ASSERT(ip->i_udquot); | |
2478 | uq = ip->i_udquot; | |
2479 | xfs_dqlock(uq); | |
2480 | XFS_DQHOLD(uq); | |
2481 | xfs_dqunlock(uq); | |
2482 | } | |
2483 | } | |
c8ad20ff | 2484 | if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) { |
1da177e4 LT |
2485 | if (ip->i_d.di_gid != gid) { |
2486 | xfs_iunlock(ip, lockflags); | |
2487 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid, | |
2488 | XFS_DQ_GROUP, | |
2489 | XFS_QMOPT_DQALLOC | | |
2490 | XFS_QMOPT_DOWARN, | |
2491 | &gq))) { | |
2492 | if (uq) | |
2493 | xfs_qm_dqrele(uq); | |
2494 | ASSERT(error != ENOENT); | |
014c2544 | 2495 | return error; |
1da177e4 LT |
2496 | } |
2497 | xfs_dqunlock(gq); | |
2498 | lockflags = XFS_ILOCK_SHARED; | |
2499 | xfs_ilock(ip, lockflags); | |
2500 | } else { | |
2501 | ASSERT(ip->i_gdquot); | |
2502 | gq = ip->i_gdquot; | |
2503 | xfs_dqlock(gq); | |
2504 | XFS_DQHOLD(gq); | |
2505 | xfs_dqunlock(gq); | |
2506 | } | |
c8ad20ff NS |
2507 | } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) { |
2508 | if (ip->i_d.di_projid != prid) { | |
2509 | xfs_iunlock(ip, lockflags); | |
2510 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid, | |
2511 | XFS_DQ_PROJ, | |
2512 | XFS_QMOPT_DQALLOC | | |
2513 | XFS_QMOPT_DOWARN, | |
2514 | &gq))) { | |
2515 | if (uq) | |
2516 | xfs_qm_dqrele(uq); | |
2517 | ASSERT(error != ENOENT); | |
2518 | return (error); | |
2519 | } | |
2520 | xfs_dqunlock(gq); | |
2521 | lockflags = XFS_ILOCK_SHARED; | |
2522 | xfs_ilock(ip, lockflags); | |
2523 | } else { | |
2524 | ASSERT(ip->i_gdquot); | |
2525 | gq = ip->i_gdquot; | |
2526 | xfs_dqlock(gq); | |
2527 | XFS_DQHOLD(gq); | |
2528 | xfs_dqunlock(gq); | |
2529 | } | |
1da177e4 LT |
2530 | } |
2531 | if (uq) | |
2532 | xfs_dqtrace_entry_ino(uq, "DQALLOC", ip); | |
2533 | ||
2534 | xfs_iunlock(ip, lockflags); | |
2535 | if (O_udqpp) | |
2536 | *O_udqpp = uq; | |
2537 | else if (uq) | |
2538 | xfs_qm_dqrele(uq); | |
2539 | if (O_gdqpp) | |
2540 | *O_gdqpp = gq; | |
2541 | else if (gq) | |
2542 | xfs_qm_dqrele(gq); | |
014c2544 | 2543 | return 0; |
1da177e4 LT |
2544 | } |
2545 | ||
2546 | /* | |
2547 | * Actually transfer ownership, and do dquot modifications. | |
2548 | * These were already reserved. | |
2549 | */ | |
2550 | xfs_dquot_t * | |
2551 | xfs_qm_vop_chown( | |
2552 | xfs_trans_t *tp, | |
2553 | xfs_inode_t *ip, | |
2554 | xfs_dquot_t **IO_olddq, | |
2555 | xfs_dquot_t *newdq) | |
2556 | { | |
2557 | xfs_dquot_t *prevdq; | |
06d10dd9 NS |
2558 | uint bfield = XFS_IS_REALTIME_INODE(ip) ? |
2559 | XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT; | |
2560 | ||
579aa9ca | 2561 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
2562 | ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount)); |
2563 | ||
2564 | /* old dquot */ | |
2565 | prevdq = *IO_olddq; | |
2566 | ASSERT(prevdq); | |
2567 | ASSERT(prevdq != newdq); | |
2568 | ||
06d10dd9 NS |
2569 | xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks)); |
2570 | xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1); | |
1da177e4 LT |
2571 | |
2572 | /* the sparkling new dquot */ | |
06d10dd9 NS |
2573 | xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks); |
2574 | xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1); | |
1da177e4 LT |
2575 | |
2576 | /* | |
2577 | * Take an extra reference, because the inode | |
2578 | * is going to keep this dquot pointer even | |
2579 | * after the trans_commit. | |
2580 | */ | |
2581 | xfs_dqlock(newdq); | |
2582 | XFS_DQHOLD(newdq); | |
2583 | xfs_dqunlock(newdq); | |
2584 | *IO_olddq = newdq; | |
2585 | ||
014c2544 | 2586 | return prevdq; |
1da177e4 LT |
2587 | } |
2588 | ||
2589 | /* | |
c8ad20ff | 2590 | * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID). |
1da177e4 LT |
2591 | */ |
2592 | int | |
2593 | xfs_qm_vop_chown_reserve( | |
2594 | xfs_trans_t *tp, | |
2595 | xfs_inode_t *ip, | |
2596 | xfs_dquot_t *udqp, | |
2597 | xfs_dquot_t *gdqp, | |
2598 | uint flags) | |
2599 | { | |
2600 | int error; | |
2601 | xfs_mount_t *mp; | |
9a2a7de2 | 2602 | uint delblks, blkflags, prjflags = 0; |
1da177e4 LT |
2603 | xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq; |
2604 | ||
579aa9ca | 2605 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
1da177e4 LT |
2606 | mp = ip->i_mount; |
2607 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
2608 | ||
2609 | delblks = ip->i_delayed_blks; | |
2610 | delblksudq = delblksgdq = unresudq = unresgdq = NULL; | |
06d10dd9 NS |
2611 | blkflags = XFS_IS_REALTIME_INODE(ip) ? |
2612 | XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
2613 | |
2614 | if (XFS_IS_UQUOTA_ON(mp) && udqp && | |
1149d96a | 2615 | ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) { |
1da177e4 LT |
2616 | delblksudq = udqp; |
2617 | /* | |
2618 | * If there are delayed allocation blocks, then we have to | |
2619 | * unreserve those from the old dquot, and add them to the | |
2620 | * new dquot. | |
2621 | */ | |
2622 | if (delblks) { | |
2623 | ASSERT(ip->i_udquot); | |
2624 | unresudq = ip->i_udquot; | |
2625 | } | |
2626 | } | |
c8ad20ff | 2627 | if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) { |
9a2a7de2 NS |
2628 | if (XFS_IS_PQUOTA_ON(ip->i_mount) && |
2629 | ip->i_d.di_projid != be32_to_cpu(gdqp->q_core.d_id)) | |
2630 | prjflags = XFS_QMOPT_ENOSPC; | |
2631 | ||
2632 | if (prjflags || | |
2633 | (XFS_IS_GQUOTA_ON(ip->i_mount) && | |
2634 | ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) { | |
c8ad20ff NS |
2635 | delblksgdq = gdqp; |
2636 | if (delblks) { | |
2637 | ASSERT(ip->i_gdquot); | |
2638 | unresgdq = ip->i_gdquot; | |
2639 | } | |
1da177e4 LT |
2640 | } |
2641 | } | |
2642 | ||
2643 | if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount, | |
2644 | delblksudq, delblksgdq, ip->i_d.di_nblocks, 1, | |
9a2a7de2 | 2645 | flags | blkflags | prjflags))) |
1da177e4 LT |
2646 | return (error); |
2647 | ||
2648 | /* | |
2649 | * Do the delayed blks reservations/unreservations now. Since, these | |
2650 | * are done without the help of a transaction, if a reservation fails | |
2651 | * its previous reservations won't be automatically undone by trans | |
2652 | * code. So, we have to do it manually here. | |
2653 | */ | |
2654 | if (delblks) { | |
2655 | /* | |
2656 | * Do the reservations first. Unreservation can't fail. | |
2657 | */ | |
2658 | ASSERT(delblksudq || delblksgdq); | |
2659 | ASSERT(unresudq || unresgdq); | |
2660 | if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2661 | delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0, | |
9a2a7de2 | 2662 | flags | blkflags | prjflags))) |
1da177e4 LT |
2663 | return (error); |
2664 | xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2665 | unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0, | |
06d10dd9 | 2666 | blkflags); |
1da177e4 LT |
2667 | } |
2668 | ||
2669 | return (0); | |
2670 | } | |
2671 | ||
2672 | int | |
2673 | xfs_qm_vop_rename_dqattach( | |
2674 | xfs_inode_t **i_tab) | |
2675 | { | |
2676 | xfs_inode_t *ip; | |
2677 | int i; | |
2678 | int error; | |
2679 | ||
2680 | ip = i_tab[0]; | |
2681 | ||
2682 | if (! XFS_IS_QUOTA_ON(ip->i_mount)) | |
014c2544 | 2683 | return 0; |
1da177e4 LT |
2684 | |
2685 | if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) { | |
2686 | error = xfs_qm_dqattach(ip, 0); | |
2687 | if (error) | |
014c2544 | 2688 | return error; |
1da177e4 LT |
2689 | } |
2690 | for (i = 1; (i < 4 && i_tab[i]); i++) { | |
2691 | /* | |
2692 | * Watch out for duplicate entries in the table. | |
2693 | */ | |
2694 | if ((ip = i_tab[i]) != i_tab[i-1]) { | |
2695 | if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) { | |
2696 | error = xfs_qm_dqattach(ip, 0); | |
2697 | if (error) | |
014c2544 | 2698 | return error; |
1da177e4 LT |
2699 | } |
2700 | } | |
2701 | } | |
014c2544 | 2702 | return 0; |
1da177e4 LT |
2703 | } |
2704 | ||
2705 | void | |
2706 | xfs_qm_vop_dqattach_and_dqmod_newinode( | |
2707 | xfs_trans_t *tp, | |
2708 | xfs_inode_t *ip, | |
2709 | xfs_dquot_t *udqp, | |
2710 | xfs_dquot_t *gdqp) | |
2711 | { | |
2712 | if (!XFS_IS_QUOTA_ON(tp->t_mountp)) | |
2713 | return; | |
2714 | ||
579aa9ca | 2715 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
2716 | ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp)); |
2717 | ||
2718 | if (udqp) { | |
2719 | xfs_dqlock(udqp); | |
2720 | XFS_DQHOLD(udqp); | |
2721 | xfs_dqunlock(udqp); | |
2722 | ASSERT(ip->i_udquot == NULL); | |
2723 | ip->i_udquot = udqp; | |
ee2a4f7c | 2724 | ASSERT(XFS_IS_UQUOTA_ON(tp->t_mountp)); |
1149d96a | 2725 | ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id)); |
1da177e4 LT |
2726 | xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1); |
2727 | } | |
2728 | if (gdqp) { | |
2729 | xfs_dqlock(gdqp); | |
2730 | XFS_DQHOLD(gdqp); | |
2731 | xfs_dqunlock(gdqp); | |
2732 | ASSERT(ip->i_gdquot == NULL); | |
2733 | ip->i_gdquot = gdqp; | |
ee2a4f7c NS |
2734 | ASSERT(XFS_IS_OQUOTA_ON(tp->t_mountp)); |
2735 | ASSERT((XFS_IS_GQUOTA_ON(tp->t_mountp) ? | |
2736 | ip->i_d.di_gid : ip->i_d.di_projid) == | |
2737 | be32_to_cpu(gdqp->q_core.d_id)); | |
1da177e4 LT |
2738 | xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1); |
2739 | } | |
2740 | } | |
2741 | ||
2742 | /* ------------- list stuff -----------------*/ | |
ba0f32d4 | 2743 | STATIC void |
1da177e4 LT |
2744 | xfs_qm_freelist_init(xfs_frlist_t *ql) |
2745 | { | |
2746 | ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql; | |
794ee1ba | 2747 | mutex_init(&ql->qh_lock); |
1da177e4 LT |
2748 | ql->qh_version = 0; |
2749 | ql->qh_nelems = 0; | |
2750 | } | |
2751 | ||
ba0f32d4 | 2752 | STATIC void |
1da177e4 LT |
2753 | xfs_qm_freelist_destroy(xfs_frlist_t *ql) |
2754 | { | |
2755 | xfs_dquot_t *dqp, *nextdqp; | |
2756 | ||
794ee1ba | 2757 | mutex_lock(&ql->qh_lock); |
1da177e4 LT |
2758 | for (dqp = ql->qh_next; |
2759 | dqp != (xfs_dquot_t *)ql; ) { | |
2760 | xfs_dqlock(dqp); | |
2761 | nextdqp = dqp->dq_flnext; | |
2762 | #ifdef QUOTADEBUG | |
2763 | cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp); | |
2764 | #endif | |
2765 | XQM_FREELIST_REMOVE(dqp); | |
2766 | xfs_dqunlock(dqp); | |
2767 | xfs_qm_dqdestroy(dqp); | |
2768 | dqp = nextdqp; | |
2769 | } | |
20722a91 | 2770 | mutex_unlock(&ql->qh_lock); |
1da177e4 LT |
2771 | mutex_destroy(&ql->qh_lock); |
2772 | ||
2773 | ASSERT(ql->qh_nelems == 0); | |
2774 | } | |
2775 | ||
ba0f32d4 | 2776 | STATIC void |
1da177e4 LT |
2777 | xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq) |
2778 | { | |
2779 | dq->dq_flnext = ql->qh_next; | |
2780 | dq->dq_flprev = (xfs_dquot_t *)ql; | |
2781 | ql->qh_next = dq; | |
2782 | dq->dq_flnext->dq_flprev = dq; | |
2783 | xfs_Gqm->qm_dqfreelist.qh_nelems++; | |
2784 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2785 | } | |
2786 | ||
2787 | void | |
2788 | xfs_qm_freelist_unlink(xfs_dquot_t *dq) | |
2789 | { | |
2790 | xfs_dquot_t *next = dq->dq_flnext; | |
2791 | xfs_dquot_t *prev = dq->dq_flprev; | |
2792 | ||
2793 | next->dq_flprev = prev; | |
2794 | prev->dq_flnext = next; | |
2795 | dq->dq_flnext = dq->dq_flprev = dq; | |
2796 | xfs_Gqm->qm_dqfreelist.qh_nelems--; | |
2797 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2798 | } | |
2799 | ||
2800 | void | |
2801 | xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq) | |
2802 | { | |
2803 | xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq); | |
2804 | } | |
2805 | ||
ba0f32d4 | 2806 | STATIC int |
1da177e4 LT |
2807 | xfs_qm_dqhashlock_nowait( |
2808 | xfs_dquot_t *dqp) | |
2809 | { | |
2810 | int locked; | |
2811 | ||
2812 | locked = mutex_trylock(&((dqp)->q_hash->qh_lock)); | |
014c2544 | 2813 | return locked; |
1da177e4 LT |
2814 | } |
2815 | ||
2816 | int | |
2817 | xfs_qm_freelist_lock_nowait( | |
2818 | xfs_qm_t *xqm) | |
2819 | { | |
2820 | int locked; | |
2821 | ||
2822 | locked = mutex_trylock(&(xqm->qm_dqfreelist.qh_lock)); | |
014c2544 | 2823 | return locked; |
1da177e4 LT |
2824 | } |
2825 | ||
ba0f32d4 | 2826 | STATIC int |
1da177e4 LT |
2827 | xfs_qm_mplist_nowait( |
2828 | xfs_mount_t *mp) | |
2829 | { | |
2830 | int locked; | |
2831 | ||
2832 | ASSERT(mp->m_quotainfo); | |
2833 | locked = mutex_trylock(&(XFS_QI_MPLLOCK(mp))); | |
014c2544 | 2834 | return locked; |
1da177e4 | 2835 | } |