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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | ||
33 | #include "xfs.h" | |
34 | #include "xfs_fs.h" | |
35 | #include "xfs_inum.h" | |
36 | #include "xfs_log.h" | |
37 | #include "xfs_clnt.h" | |
38 | #include "xfs_trans.h" | |
39 | #include "xfs_sb.h" | |
40 | #include "xfs_ag.h" | |
41 | #include "xfs_dir.h" | |
42 | #include "xfs_dir2.h" | |
43 | #include "xfs_alloc.h" | |
44 | #include "xfs_dmapi.h" | |
45 | #include "xfs_quota.h" | |
46 | #include "xfs_mount.h" | |
47 | #include "xfs_alloc_btree.h" | |
48 | #include "xfs_bmap_btree.h" | |
49 | #include "xfs_ialloc_btree.h" | |
50 | #include "xfs_btree.h" | |
51 | #include "xfs_ialloc.h" | |
52 | #include "xfs_attr_sf.h" | |
53 | #include "xfs_dir_sf.h" | |
54 | #include "xfs_dir2_sf.h" | |
55 | #include "xfs_dinode.h" | |
56 | #include "xfs_inode.h" | |
57 | #include "xfs_bmap.h" | |
58 | #include "xfs_bit.h" | |
59 | #include "xfs_rtalloc.h" | |
60 | #include "xfs_error.h" | |
61 | #include "xfs_itable.h" | |
62 | #include "xfs_rw.h" | |
63 | #include "xfs_acl.h" | |
64 | #include "xfs_cap.h" | |
65 | #include "xfs_mac.h" | |
66 | #include "xfs_attr.h" | |
67 | #include "xfs_buf_item.h" | |
68 | #include "xfs_trans_space.h" | |
69 | #include "xfs_utils.h" | |
70 | ||
71 | #include "xfs_qm.h" | |
72 | ||
73 | /* | |
74 | * The global quota manager. There is only one of these for the entire | |
75 | * system, _not_ one per file system. XQM keeps track of the overall | |
76 | * quota functionality, including maintaining the freelist and hash | |
77 | * tables of dquots. | |
78 | */ | |
79 | mutex_t xfs_Gqm_lock; | |
80 | struct xfs_qm *xfs_Gqm; | |
81 | ||
82 | kmem_zone_t *qm_dqzone; | |
83 | kmem_zone_t *qm_dqtrxzone; | |
ba0f32d4 | 84 | STATIC kmem_shaker_t xfs_qm_shaker; |
1da177e4 LT |
85 | |
86 | STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int); | |
87 | STATIC void xfs_qm_list_destroy(xfs_dqlist_t *); | |
88 | ||
ba0f32d4 CH |
89 | STATIC void xfs_qm_freelist_init(xfs_frlist_t *); |
90 | STATIC void xfs_qm_freelist_destroy(xfs_frlist_t *); | |
91 | STATIC int xfs_qm_mplist_nowait(xfs_mount_t *); | |
92 | STATIC int xfs_qm_dqhashlock_nowait(xfs_dquot_t *); | |
93 | ||
1da177e4 | 94 | STATIC int xfs_qm_init_quotainos(xfs_mount_t *); |
ba0f32d4 | 95 | STATIC int xfs_qm_init_quotainfo(xfs_mount_t *); |
1da177e4 LT |
96 | STATIC int xfs_qm_shake(int, unsigned int); |
97 | ||
98 | #ifdef DEBUG | |
99 | extern mutex_t qcheck_lock; | |
100 | #endif | |
101 | ||
102 | #ifdef QUOTADEBUG | |
103 | #define XQM_LIST_PRINT(l, NXT, title) \ | |
104 | { \ | |
105 | xfs_dquot_t *dqp; int i = 0; \ | |
106 | cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \ | |
107 | for (dqp = (l)->qh_next; dqp != NULL; dqp = dqp->NXT) { \ | |
108 | cmn_err(CE_DEBUG, " %d. \"%d (%s)\" " \ | |
109 | "bcnt = %d, icnt = %d, refs = %d", \ | |
110 | ++i, (int) INT_GET(dqp->q_core.d_id, ARCH_CONVERT), \ | |
111 | DQFLAGTO_TYPESTR(dqp), \ | |
112 | (int) INT_GET(dqp->q_core.d_bcount, ARCH_CONVERT), \ | |
113 | (int) INT_GET(dqp->q_core.d_icount, ARCH_CONVERT), \ | |
114 | (int) dqp->q_nrefs); } \ | |
115 | } | |
116 | #else | |
117 | #define XQM_LIST_PRINT(l, NXT, title) do { } while (0) | |
118 | #endif | |
119 | ||
120 | /* | |
121 | * Initialize the XQM structure. | |
122 | * Note that there is not one quota manager per file system. | |
123 | */ | |
124 | STATIC struct xfs_qm * | |
125 | xfs_Gqm_init(void) | |
126 | { | |
127 | xfs_qm_t *xqm; | |
128 | int hsize, i; | |
129 | ||
130 | xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP); | |
131 | ASSERT(xqm); | |
132 | ||
133 | /* | |
134 | * Initialize the dquot hash tables. | |
135 | */ | |
136 | hsize = (DQUOT_HASH_HEURISTIC < XFS_QM_NCSIZE_THRESHOLD) ? | |
137 | XFS_QM_HASHSIZE_LOW : XFS_QM_HASHSIZE_HIGH; | |
138 | xqm->qm_dqhashmask = hsize - 1; | |
139 | ||
140 | xqm->qm_usr_dqhtable = (xfs_dqhash_t *)kmem_zalloc(hsize * | |
141 | sizeof(xfs_dqhash_t), | |
142 | KM_SLEEP); | |
143 | xqm->qm_grp_dqhtable = (xfs_dqhash_t *)kmem_zalloc(hsize * | |
144 | sizeof(xfs_dqhash_t), | |
145 | KM_SLEEP); | |
146 | ASSERT(xqm->qm_usr_dqhtable != NULL); | |
147 | ASSERT(xqm->qm_grp_dqhtable != NULL); | |
148 | ||
149 | for (i = 0; i < hsize; i++) { | |
150 | xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i); | |
151 | xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i); | |
152 | } | |
153 | ||
154 | /* | |
155 | * Freelist of all dquots of all file systems | |
156 | */ | |
157 | xfs_qm_freelist_init(&(xqm->qm_dqfreelist)); | |
158 | ||
159 | /* | |
160 | * dquot zone. we register our own low-memory callback. | |
161 | */ | |
162 | if (!qm_dqzone) { | |
163 | xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t), | |
164 | "xfs_dquots"); | |
165 | qm_dqzone = xqm->qm_dqzone; | |
166 | } else | |
167 | xqm->qm_dqzone = qm_dqzone; | |
168 | ||
169 | xfs_qm_shaker = kmem_shake_register(xfs_qm_shake); | |
170 | ||
171 | /* | |
172 | * The t_dqinfo portion of transactions. | |
173 | */ | |
174 | if (!qm_dqtrxzone) { | |
175 | xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t), | |
176 | "xfs_dqtrx"); | |
177 | qm_dqtrxzone = xqm->qm_dqtrxzone; | |
178 | } else | |
179 | xqm->qm_dqtrxzone = qm_dqtrxzone; | |
180 | ||
181 | atomic_set(&xqm->qm_totaldquots, 0); | |
182 | xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO; | |
183 | xqm->qm_nrefs = 0; | |
184 | #ifdef DEBUG | |
185 | mutex_init(&qcheck_lock, MUTEX_DEFAULT, "qchk"); | |
186 | #endif | |
187 | return xqm; | |
188 | } | |
189 | ||
190 | /* | |
191 | * Destroy the global quota manager when its reference count goes to zero. | |
192 | */ | |
ba0f32d4 | 193 | STATIC void |
1da177e4 LT |
194 | xfs_qm_destroy( |
195 | struct xfs_qm *xqm) | |
196 | { | |
197 | int hsize, i; | |
198 | ||
199 | ASSERT(xqm != NULL); | |
200 | ASSERT(xqm->qm_nrefs == 0); | |
201 | kmem_shake_deregister(xfs_qm_shaker); | |
202 | hsize = xqm->qm_dqhashmask + 1; | |
203 | for (i = 0; i < hsize; i++) { | |
204 | xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i])); | |
205 | xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i])); | |
206 | } | |
207 | kmem_free(xqm->qm_usr_dqhtable, hsize * sizeof(xfs_dqhash_t)); | |
208 | kmem_free(xqm->qm_grp_dqhtable, hsize * sizeof(xfs_dqhash_t)); | |
209 | xqm->qm_usr_dqhtable = NULL; | |
210 | xqm->qm_grp_dqhtable = NULL; | |
211 | xqm->qm_dqhashmask = 0; | |
212 | xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist)); | |
213 | #ifdef DEBUG | |
214 | mutex_destroy(&qcheck_lock); | |
215 | #endif | |
216 | kmem_free(xqm, sizeof(xfs_qm_t)); | |
217 | } | |
218 | ||
219 | /* | |
220 | * Called at mount time to let XQM know that another file system is | |
221 | * starting quotas. This isn't crucial information as the individual mount | |
222 | * structures are pretty independent, but it helps the XQM keep a | |
223 | * global view of what's going on. | |
224 | */ | |
225 | /* ARGSUSED */ | |
226 | STATIC int | |
227 | xfs_qm_hold_quotafs_ref( | |
228 | struct xfs_mount *mp) | |
229 | { | |
230 | /* | |
231 | * Need to lock the xfs_Gqm structure for things like this. For example, | |
232 | * the structure could disappear between the entry to this routine and | |
233 | * a HOLD operation if not locked. | |
234 | */ | |
235 | XFS_QM_LOCK(xfs_Gqm); | |
236 | ||
237 | if (xfs_Gqm == NULL) | |
238 | xfs_Gqm = xfs_Gqm_init(); | |
239 | /* | |
240 | * We can keep a list of all filesystems with quotas mounted for | |
241 | * debugging and statistical purposes, but ... | |
242 | * Just take a reference and get out. | |
243 | */ | |
244 | XFS_QM_HOLD(xfs_Gqm); | |
245 | XFS_QM_UNLOCK(xfs_Gqm); | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | ||
251 | /* | |
252 | * Release the reference that a filesystem took at mount time, | |
253 | * so that we know when we need to destroy the entire quota manager. | |
254 | */ | |
255 | /* ARGSUSED */ | |
256 | STATIC void | |
257 | xfs_qm_rele_quotafs_ref( | |
258 | struct xfs_mount *mp) | |
259 | { | |
260 | xfs_dquot_t *dqp, *nextdqp; | |
261 | ||
262 | ASSERT(xfs_Gqm); | |
263 | ASSERT(xfs_Gqm->qm_nrefs > 0); | |
264 | ||
265 | /* | |
266 | * Go thru the freelist and destroy all inactive dquots. | |
267 | */ | |
268 | xfs_qm_freelist_lock(xfs_Gqm); | |
269 | ||
270 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
271 | dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) { | |
272 | xfs_dqlock(dqp); | |
273 | nextdqp = dqp->dq_flnext; | |
274 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
275 | ASSERT(dqp->q_mount == NULL); | |
276 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
277 | ASSERT(dqp->HL_PREVP == NULL); | |
278 | ASSERT(dqp->MPL_PREVP == NULL); | |
279 | XQM_FREELIST_REMOVE(dqp); | |
280 | xfs_dqunlock(dqp); | |
281 | xfs_qm_dqdestroy(dqp); | |
282 | } else { | |
283 | xfs_dqunlock(dqp); | |
284 | } | |
285 | dqp = nextdqp; | |
286 | } | |
287 | xfs_qm_freelist_unlock(xfs_Gqm); | |
288 | ||
289 | /* | |
290 | * Destroy the entire XQM. If somebody mounts with quotaon, this'll | |
291 | * be restarted. | |
292 | */ | |
293 | XFS_QM_LOCK(xfs_Gqm); | |
294 | XFS_QM_RELE(xfs_Gqm); | |
295 | if (xfs_Gqm->qm_nrefs == 0) { | |
296 | xfs_qm_destroy(xfs_Gqm); | |
297 | xfs_Gqm = NULL; | |
298 | } | |
299 | XFS_QM_UNLOCK(xfs_Gqm); | |
300 | } | |
301 | ||
302 | /* | |
303 | * This is called at mount time from xfs_mountfs to initialize the quotainfo | |
304 | * structure and start the global quotamanager (xfs_Gqm) if it hasn't done | |
305 | * so already. Note that the superblock has not been read in yet. | |
306 | */ | |
307 | void | |
308 | xfs_qm_mount_quotainit( | |
309 | xfs_mount_t *mp, | |
310 | uint flags) | |
311 | { | |
312 | /* | |
c8ad20ff | 313 | * User, projects or group quotas has to be on. |
1da177e4 | 314 | */ |
c8ad20ff | 315 | ASSERT(flags & (XFSMNT_UQUOTA | XFSMNT_PQUOTA | XFSMNT_GQUOTA)); |
1da177e4 LT |
316 | |
317 | /* | |
318 | * Initialize the flags in the mount structure. From this point | |
319 | * onwards we look at m_qflags to figure out if quotas's ON/OFF, etc. | |
320 | * Note that we enforce nothing if accounting is off. | |
321 | * ie. XFSMNT_*QUOTA must be ON for XFSMNT_*QUOTAENF. | |
322 | * It isn't necessary to take the quotaoff lock to do this; this is | |
323 | * called from mount. | |
324 | */ | |
325 | if (flags & XFSMNT_UQUOTA) { | |
326 | mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); | |
327 | if (flags & XFSMNT_UQUOTAENF) | |
328 | mp->m_qflags |= XFS_UQUOTA_ENFD; | |
329 | } | |
330 | if (flags & XFSMNT_GQUOTA) { | |
331 | mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); | |
332 | if (flags & XFSMNT_GQUOTAENF) | |
c8ad20ff NS |
333 | mp->m_qflags |= XFS_OQUOTA_ENFD; |
334 | } else if (flags & XFSMNT_PQUOTA) { | |
335 | mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); | |
336 | if (flags & XFSMNT_PQUOTAENF) | |
337 | mp->m_qflags |= XFS_OQUOTA_ENFD; | |
1da177e4 LT |
338 | } |
339 | } | |
340 | ||
341 | /* | |
342 | * Just destroy the quotainfo structure. | |
343 | */ | |
344 | void | |
345 | xfs_qm_unmount_quotadestroy( | |
346 | xfs_mount_t *mp) | |
347 | { | |
348 | if (mp->m_quotainfo) | |
349 | xfs_qm_destroy_quotainfo(mp); | |
350 | } | |
351 | ||
352 | ||
353 | /* | |
354 | * This is called from xfs_mountfs to start quotas and initialize all | |
355 | * necessary data structures like quotainfo. This is also responsible for | |
356 | * running a quotacheck as necessary. We are guaranteed that the superblock | |
357 | * is consistently read in at this point. | |
358 | */ | |
359 | int | |
360 | xfs_qm_mount_quotas( | |
361 | xfs_mount_t *mp, | |
362 | int mfsi_flags) | |
363 | { | |
364 | unsigned long s; | |
365 | int error = 0; | |
366 | uint sbf; | |
367 | ||
368 | /* | |
369 | * If a file system had quotas running earlier, but decided to | |
c8ad20ff | 370 | * mount without -o uquota/pquota/gquota options, revoke the |
1da177e4 LT |
371 | * quotachecked license, and bail out. |
372 | */ | |
373 | if (! XFS_IS_QUOTA_ON(mp) && | |
c8ad20ff | 374 | (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT)) { |
1da177e4 LT |
375 | mp->m_qflags = 0; |
376 | goto write_changes; | |
377 | } | |
378 | ||
379 | /* | |
380 | * If quotas on realtime volumes is not supported, we disable | |
381 | * quotas immediately. | |
382 | */ | |
383 | if (mp->m_sb.sb_rextents) { | |
384 | cmn_err(CE_NOTE, | |
385 | "Cannot turn on quotas for realtime filesystem %s", | |
386 | mp->m_fsname); | |
387 | mp->m_qflags = 0; | |
388 | goto write_changes; | |
389 | } | |
390 | ||
391 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
392 | cmn_err(CE_NOTE, "Attempting to turn on disk quotas."); | |
393 | #endif | |
394 | ||
395 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
396 | /* | |
397 | * Allocate the quotainfo structure inside the mount struct, and | |
398 | * create quotainode(s), and change/rev superblock if necessary. | |
399 | */ | |
400 | if ((error = xfs_qm_init_quotainfo(mp))) { | |
401 | /* | |
402 | * We must turn off quotas. | |
403 | */ | |
404 | ASSERT(mp->m_quotainfo == NULL); | |
405 | mp->m_qflags = 0; | |
406 | goto write_changes; | |
407 | } | |
408 | /* | |
409 | * If any of the quotas are not consistent, do a quotacheck. | |
410 | */ | |
411 | if (XFS_QM_NEED_QUOTACHECK(mp) && | |
412 | !(mfsi_flags & XFS_MFSI_NO_QUOTACHECK)) { | |
413 | #ifdef DEBUG | |
414 | cmn_err(CE_NOTE, "Doing a quotacheck. Please wait."); | |
415 | #endif | |
416 | if ((error = xfs_qm_quotacheck(mp))) { | |
417 | /* Quotacheck has failed and quotas have | |
418 | * been disabled. | |
419 | */ | |
420 | return XFS_ERROR(error); | |
421 | } | |
422 | #ifdef DEBUG | |
423 | cmn_err(CE_NOTE, "Done quotacheck."); | |
424 | #endif | |
425 | } | |
426 | write_changes: | |
427 | /* | |
428 | * We actually don't have to acquire the SB_LOCK at all. | |
429 | * This can only be called from mount, and that's single threaded. XXX | |
430 | */ | |
431 | s = XFS_SB_LOCK(mp); | |
432 | sbf = mp->m_sb.sb_qflags; | |
433 | mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL; | |
434 | XFS_SB_UNLOCK(mp, s); | |
435 | ||
436 | if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) { | |
437 | if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) { | |
438 | /* | |
439 | * We could only have been turning quotas off. | |
440 | * We aren't in very good shape actually because | |
441 | * the incore structures are convinced that quotas are | |
442 | * off, but the on disk superblock doesn't know that ! | |
443 | */ | |
444 | ASSERT(!(XFS_IS_QUOTA_RUNNING(mp))); | |
445 | xfs_fs_cmn_err(CE_ALERT, mp, | |
446 | "XFS mount_quotas: Superblock update failed!"); | |
447 | } | |
448 | } | |
449 | ||
450 | if (error) { | |
451 | xfs_fs_cmn_err(CE_WARN, mp, | |
452 | "Failed to initialize disk quotas."); | |
453 | } | |
454 | return XFS_ERROR(error); | |
455 | } | |
456 | ||
457 | /* | |
458 | * Called from the vfsops layer. | |
459 | */ | |
460 | int | |
461 | xfs_qm_unmount_quotas( | |
462 | xfs_mount_t *mp) | |
463 | { | |
464 | xfs_inode_t *uqp, *gqp; | |
465 | int error = 0; | |
466 | ||
467 | /* | |
468 | * Release the dquots that root inode, et al might be holding, | |
469 | * before we flush quotas and blow away the quotainfo structure. | |
470 | */ | |
471 | ASSERT(mp->m_rootip); | |
472 | xfs_qm_dqdetach(mp->m_rootip); | |
473 | if (mp->m_rbmip) | |
474 | xfs_qm_dqdetach(mp->m_rbmip); | |
475 | if (mp->m_rsumip) | |
476 | xfs_qm_dqdetach(mp->m_rsumip); | |
477 | ||
478 | /* | |
479 | * Flush out the quota inodes. | |
480 | */ | |
481 | uqp = gqp = NULL; | |
482 | if (mp->m_quotainfo) { | |
483 | if ((uqp = mp->m_quotainfo->qi_uquotaip) != NULL) { | |
484 | xfs_ilock(uqp, XFS_ILOCK_EXCL); | |
485 | xfs_iflock(uqp); | |
486 | error = xfs_iflush(uqp, XFS_IFLUSH_SYNC); | |
487 | xfs_iunlock(uqp, XFS_ILOCK_EXCL); | |
488 | if (unlikely(error == EFSCORRUPTED)) { | |
489 | XFS_ERROR_REPORT("xfs_qm_unmount_quotas(1)", | |
490 | XFS_ERRLEVEL_LOW, mp); | |
491 | goto out; | |
492 | } | |
493 | } | |
494 | if ((gqp = mp->m_quotainfo->qi_gquotaip) != NULL) { | |
495 | xfs_ilock(gqp, XFS_ILOCK_EXCL); | |
496 | xfs_iflock(gqp); | |
497 | error = xfs_iflush(gqp, XFS_IFLUSH_SYNC); | |
498 | xfs_iunlock(gqp, XFS_ILOCK_EXCL); | |
499 | if (unlikely(error == EFSCORRUPTED)) { | |
500 | XFS_ERROR_REPORT("xfs_qm_unmount_quotas(2)", | |
501 | XFS_ERRLEVEL_LOW, mp); | |
502 | goto out; | |
503 | } | |
504 | } | |
505 | } | |
506 | if (uqp) { | |
507 | XFS_PURGE_INODE(uqp); | |
508 | mp->m_quotainfo->qi_uquotaip = NULL; | |
509 | } | |
510 | if (gqp) { | |
511 | XFS_PURGE_INODE(gqp); | |
512 | mp->m_quotainfo->qi_gquotaip = NULL; | |
513 | } | |
514 | out: | |
515 | return XFS_ERROR(error); | |
516 | } | |
517 | ||
518 | /* | |
519 | * Flush all dquots of the given file system to disk. The dquots are | |
520 | * _not_ purged from memory here, just their data written to disk. | |
521 | */ | |
ba0f32d4 | 522 | STATIC int |
1da177e4 LT |
523 | xfs_qm_dqflush_all( |
524 | xfs_mount_t *mp, | |
525 | int flags) | |
526 | { | |
527 | int recl; | |
528 | xfs_dquot_t *dqp; | |
529 | int niters; | |
530 | int error; | |
531 | ||
532 | if (mp->m_quotainfo == NULL) | |
533 | return (0); | |
534 | niters = 0; | |
535 | again: | |
536 | xfs_qm_mplist_lock(mp); | |
537 | FOREACH_DQUOT_IN_MP(dqp, mp) { | |
538 | xfs_dqlock(dqp); | |
539 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
540 | xfs_dqunlock(dqp); | |
541 | continue; | |
542 | } | |
543 | xfs_dqtrace_entry(dqp, "FLUSHALL: DQDIRTY"); | |
544 | /* XXX a sentinel would be better */ | |
545 | recl = XFS_QI_MPLRECLAIMS(mp); | |
546 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
547 | /* | |
548 | * If we can't grab the flush lock then check | |
549 | * to see if the dquot has been flushed delayed | |
550 | * write. If so, grab its buffer and send it | |
551 | * out immediately. We'll be able to acquire | |
552 | * the flush lock when the I/O completes. | |
553 | */ | |
554 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
555 | } | |
556 | /* | |
557 | * Let go of the mplist lock. We don't want to hold it | |
558 | * across a disk write. | |
559 | */ | |
560 | xfs_qm_mplist_unlock(mp); | |
561 | error = xfs_qm_dqflush(dqp, flags); | |
562 | xfs_dqunlock(dqp); | |
563 | if (error) | |
564 | return (error); | |
565 | ||
566 | xfs_qm_mplist_lock(mp); | |
567 | if (recl != XFS_QI_MPLRECLAIMS(mp)) { | |
568 | xfs_qm_mplist_unlock(mp); | |
569 | /* XXX restart limit */ | |
570 | goto again; | |
571 | } | |
572 | } | |
573 | ||
574 | xfs_qm_mplist_unlock(mp); | |
575 | /* return ! busy */ | |
576 | return (0); | |
577 | } | |
578 | /* | |
579 | * Release the group dquot pointers the user dquots may be | |
580 | * carrying around as a hint. mplist is locked on entry and exit. | |
581 | */ | |
582 | STATIC void | |
583 | xfs_qm_detach_gdquots( | |
584 | xfs_mount_t *mp) | |
585 | { | |
586 | xfs_dquot_t *dqp, *gdqp; | |
587 | int nrecl; | |
588 | ||
589 | again: | |
590 | ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp)); | |
591 | dqp = XFS_QI_MPLNEXT(mp); | |
592 | while (dqp) { | |
593 | xfs_dqlock(dqp); | |
594 | if ((gdqp = dqp->q_gdquot)) { | |
595 | xfs_dqlock(gdqp); | |
596 | dqp->q_gdquot = NULL; | |
597 | } | |
598 | xfs_dqunlock(dqp); | |
599 | ||
600 | if (gdqp) { | |
601 | /* | |
602 | * Can't hold the mplist lock across a dqput. | |
603 | * XXXmust convert to marker based iterations here. | |
604 | */ | |
605 | nrecl = XFS_QI_MPLRECLAIMS(mp); | |
606 | xfs_qm_mplist_unlock(mp); | |
607 | xfs_qm_dqput(gdqp); | |
608 | ||
609 | xfs_qm_mplist_lock(mp); | |
610 | if (nrecl != XFS_QI_MPLRECLAIMS(mp)) | |
611 | goto again; | |
612 | } | |
613 | dqp = dqp->MPL_NEXT; | |
614 | } | |
615 | } | |
616 | ||
617 | /* | |
618 | * Go through all the incore dquots of this file system and take them | |
619 | * off the mplist and hashlist, if the dquot type matches the dqtype | |
620 | * parameter. This is used when turning off quota accounting for | |
621 | * users and/or groups, as well as when the filesystem is unmounting. | |
622 | */ | |
623 | STATIC int | |
624 | xfs_qm_dqpurge_int( | |
625 | xfs_mount_t *mp, | |
c8ad20ff | 626 | uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/PQUOTA/GQUOTA */ |
1da177e4 LT |
627 | { |
628 | xfs_dquot_t *dqp; | |
629 | uint dqtype; | |
630 | int nrecl; | |
631 | xfs_dquot_t *nextdqp; | |
632 | int nmisses; | |
633 | ||
634 | if (mp->m_quotainfo == NULL) | |
635 | return (0); | |
636 | ||
637 | dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0; | |
c8ad20ff | 638 | dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0; |
1da177e4 LT |
639 | dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0; |
640 | ||
641 | xfs_qm_mplist_lock(mp); | |
642 | ||
643 | /* | |
644 | * In the first pass through all incore dquots of this filesystem, | |
645 | * we release the group dquot pointers the user dquots may be | |
646 | * carrying around as a hint. We need to do this irrespective of | |
647 | * what's being turned off. | |
648 | */ | |
649 | xfs_qm_detach_gdquots(mp); | |
650 | ||
651 | again: | |
652 | nmisses = 0; | |
653 | ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp)); | |
654 | /* | |
655 | * Try to get rid of all of the unwanted dquots. The idea is to | |
656 | * get them off mplist and hashlist, but leave them on freelist. | |
657 | */ | |
658 | dqp = XFS_QI_MPLNEXT(mp); | |
659 | while (dqp) { | |
660 | /* | |
661 | * It's OK to look at the type without taking dqlock here. | |
662 | * We're holding the mplist lock here, and that's needed for | |
663 | * a dqreclaim. | |
664 | */ | |
665 | if ((dqp->dq_flags & dqtype) == 0) { | |
666 | dqp = dqp->MPL_NEXT; | |
667 | continue; | |
668 | } | |
669 | ||
670 | if (! xfs_qm_dqhashlock_nowait(dqp)) { | |
671 | nrecl = XFS_QI_MPLRECLAIMS(mp); | |
672 | xfs_qm_mplist_unlock(mp); | |
673 | XFS_DQ_HASH_LOCK(dqp->q_hash); | |
674 | xfs_qm_mplist_lock(mp); | |
675 | ||
676 | /* | |
677 | * XXXTheoretically, we can get into a very long | |
678 | * ping pong game here. | |
679 | * No one can be adding dquots to the mplist at | |
680 | * this point, but somebody might be taking things off. | |
681 | */ | |
682 | if (nrecl != XFS_QI_MPLRECLAIMS(mp)) { | |
683 | XFS_DQ_HASH_UNLOCK(dqp->q_hash); | |
684 | goto again; | |
685 | } | |
686 | } | |
687 | ||
688 | /* | |
689 | * Take the dquot off the mplist and hashlist. It may remain on | |
690 | * freelist in INACTIVE state. | |
691 | */ | |
692 | nextdqp = dqp->MPL_NEXT; | |
693 | nmisses += xfs_qm_dqpurge(dqp, flags); | |
694 | dqp = nextdqp; | |
695 | } | |
696 | xfs_qm_mplist_unlock(mp); | |
697 | return nmisses; | |
698 | } | |
699 | ||
700 | int | |
701 | xfs_qm_dqpurge_all( | |
702 | xfs_mount_t *mp, | |
703 | uint flags) | |
704 | { | |
705 | int ndquots; | |
706 | ||
707 | /* | |
708 | * Purge the dquot cache. | |
709 | * None of the dquots should really be busy at this point. | |
710 | */ | |
711 | if (mp->m_quotainfo) { | |
712 | while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) { | |
713 | delay(ndquots * 10); | |
714 | } | |
715 | } | |
716 | return 0; | |
717 | } | |
718 | ||
719 | STATIC int | |
720 | xfs_qm_dqattach_one( | |
721 | xfs_inode_t *ip, | |
722 | xfs_dqid_t id, | |
723 | uint type, | |
724 | uint doalloc, | |
725 | uint dolock, | |
726 | xfs_dquot_t *udqhint, /* hint */ | |
727 | xfs_dquot_t **IO_idqpp) | |
728 | { | |
729 | xfs_dquot_t *dqp; | |
730 | int error; | |
731 | ||
732 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
733 | error = 0; | |
734 | /* | |
735 | * See if we already have it in the inode itself. IO_idqpp is | |
736 | * &i_udquot or &i_gdquot. This made the code look weird, but | |
737 | * made the logic a lot simpler. | |
738 | */ | |
739 | if ((dqp = *IO_idqpp)) { | |
740 | if (dolock) | |
741 | xfs_dqlock(dqp); | |
742 | xfs_dqtrace_entry(dqp, "DQATTACH: found in ip"); | |
743 | goto done; | |
744 | } | |
745 | ||
746 | /* | |
747 | * udqhint is the i_udquot field in inode, and is non-NULL only | |
c8ad20ff | 748 | * when the type arg is group/project. Its purpose is to save a |
1da177e4 LT |
749 | * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside |
750 | * the user dquot. | |
751 | */ | |
c8ad20ff | 752 | ASSERT(!udqhint || type == XFS_DQ_GROUP || type == XFS_DQ_PROJ); |
1da177e4 LT |
753 | if (udqhint && !dolock) |
754 | xfs_dqlock(udqhint); | |
755 | ||
756 | /* | |
757 | * No need to take dqlock to look at the id. | |
758 | * The ID can't change until it gets reclaimed, and it won't | |
759 | * be reclaimed as long as we have a ref from inode and we hold | |
760 | * the ilock. | |
761 | */ | |
762 | if (udqhint && | |
763 | (dqp = udqhint->q_gdquot) && | |
764 | (INT_GET(dqp->q_core.d_id, ARCH_CONVERT) == id)) { | |
765 | ASSERT(XFS_DQ_IS_LOCKED(udqhint)); | |
766 | xfs_dqlock(dqp); | |
767 | XFS_DQHOLD(dqp); | |
768 | ASSERT(*IO_idqpp == NULL); | |
769 | *IO_idqpp = dqp; | |
770 | if (!dolock) { | |
771 | xfs_dqunlock(dqp); | |
772 | xfs_dqunlock(udqhint); | |
773 | } | |
774 | goto done; | |
775 | } | |
776 | /* | |
777 | * We can't hold a dquot lock when we call the dqget code. | |
778 | * We'll deadlock in no time, because of (not conforming to) | |
779 | * lock ordering - the inodelock comes before any dquot lock, | |
780 | * and we may drop and reacquire the ilock in xfs_qm_dqget(). | |
781 | */ | |
782 | if (udqhint) | |
783 | xfs_dqunlock(udqhint); | |
784 | /* | |
785 | * Find the dquot from somewhere. This bumps the | |
786 | * reference count of dquot and returns it locked. | |
787 | * This can return ENOENT if dquot didn't exist on | |
788 | * disk and we didn't ask it to allocate; | |
789 | * ESRCH if quotas got turned off suddenly. | |
790 | */ | |
791 | if ((error = xfs_qm_dqget(ip->i_mount, ip, id, type, | |
792 | doalloc|XFS_QMOPT_DOWARN, &dqp))) { | |
793 | if (udqhint && dolock) | |
794 | xfs_dqlock(udqhint); | |
795 | goto done; | |
796 | } | |
797 | ||
798 | xfs_dqtrace_entry(dqp, "DQATTACH: found by dqget"); | |
799 | /* | |
800 | * dqget may have dropped and re-acquired the ilock, but it guarantees | |
801 | * that the dquot returned is the one that should go in the inode. | |
802 | */ | |
803 | *IO_idqpp = dqp; | |
804 | ASSERT(dqp); | |
805 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
806 | if (! dolock) { | |
807 | xfs_dqunlock(dqp); | |
808 | goto done; | |
809 | } | |
810 | if (! udqhint) | |
811 | goto done; | |
812 | ||
813 | ASSERT(udqhint); | |
814 | ASSERT(dolock); | |
815 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
816 | if (! xfs_qm_dqlock_nowait(udqhint)) { | |
817 | xfs_dqunlock(dqp); | |
818 | xfs_dqlock(udqhint); | |
819 | xfs_dqlock(dqp); | |
820 | } | |
821 | done: | |
822 | #ifdef QUOTADEBUG | |
823 | if (udqhint) { | |
824 | if (dolock) | |
825 | ASSERT(XFS_DQ_IS_LOCKED(udqhint)); | |
826 | } | |
827 | if (! error) { | |
828 | if (dolock) | |
829 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
830 | } | |
831 | #endif | |
832 | return (error); | |
833 | } | |
834 | ||
835 | ||
836 | /* | |
837 | * Given a udquot and gdquot, attach a ptr to the group dquot in the | |
838 | * udquot as a hint for future lookups. The idea sounds simple, but the | |
839 | * execution isn't, because the udquot might have a group dquot attached | |
840 | * already and getting rid of that gets us into lock ordering contraints. | |
841 | * The process is complicated more by the fact that the dquots may or may not | |
842 | * be locked on entry. | |
843 | */ | |
844 | STATIC void | |
845 | xfs_qm_dqattach_grouphint( | |
846 | xfs_dquot_t *udq, | |
847 | xfs_dquot_t *gdq, | |
848 | uint locked) | |
849 | { | |
850 | xfs_dquot_t *tmp; | |
851 | ||
852 | #ifdef QUOTADEBUG | |
853 | if (locked) { | |
854 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
855 | ASSERT(XFS_DQ_IS_LOCKED(gdq)); | |
856 | } | |
857 | #endif | |
858 | if (! locked) | |
859 | xfs_dqlock(udq); | |
860 | ||
861 | if ((tmp = udq->q_gdquot)) { | |
862 | if (tmp == gdq) { | |
863 | if (! locked) | |
864 | xfs_dqunlock(udq); | |
865 | return; | |
866 | } | |
867 | ||
868 | udq->q_gdquot = NULL; | |
869 | /* | |
870 | * We can't keep any dqlocks when calling dqrele, | |
871 | * because the freelist lock comes before dqlocks. | |
872 | */ | |
873 | xfs_dqunlock(udq); | |
874 | if (locked) | |
875 | xfs_dqunlock(gdq); | |
876 | /* | |
877 | * we took a hard reference once upon a time in dqget, | |
878 | * so give it back when the udquot no longer points at it | |
879 | * dqput() does the unlocking of the dquot. | |
880 | */ | |
881 | xfs_qm_dqrele(tmp); | |
882 | ||
883 | xfs_dqlock(udq); | |
884 | xfs_dqlock(gdq); | |
885 | ||
886 | } else { | |
887 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
888 | if (! locked) { | |
889 | xfs_dqlock(gdq); | |
890 | } | |
891 | } | |
892 | ||
893 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
894 | ASSERT(XFS_DQ_IS_LOCKED(gdq)); | |
895 | /* | |
896 | * Somebody could have attached a gdquot here, | |
897 | * when we dropped the uqlock. If so, just do nothing. | |
898 | */ | |
899 | if (udq->q_gdquot == NULL) { | |
900 | XFS_DQHOLD(gdq); | |
901 | udq->q_gdquot = gdq; | |
902 | } | |
903 | if (! locked) { | |
904 | xfs_dqunlock(gdq); | |
905 | xfs_dqunlock(udq); | |
906 | } | |
907 | } | |
908 | ||
909 | ||
910 | /* | |
c8ad20ff NS |
911 | * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON |
912 | * into account. | |
1da177e4 LT |
913 | * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed. |
914 | * If XFS_QMOPT_DQLOCK, the dquot(s) will be returned locked. This option pretty | |
915 | * much made this code a complete mess, but it has been pretty useful. | |
916 | * If XFS_QMOPT_ILOCKED, then inode sent is already locked EXCL. | |
917 | * Inode may get unlocked and relocked in here, and the caller must deal with | |
918 | * the consequences. | |
919 | */ | |
920 | int | |
921 | xfs_qm_dqattach( | |
922 | xfs_inode_t *ip, | |
923 | uint flags) | |
924 | { | |
925 | xfs_mount_t *mp = ip->i_mount; | |
926 | uint nquotas = 0; | |
927 | int error = 0; | |
928 | ||
929 | if ((! XFS_IS_QUOTA_ON(mp)) || | |
930 | (! XFS_NOT_DQATTACHED(mp, ip)) || | |
931 | (ip->i_ino == mp->m_sb.sb_uquotino) || | |
932 | (ip->i_ino == mp->m_sb.sb_gquotino)) | |
933 | return (0); | |
934 | ||
935 | ASSERT((flags & XFS_QMOPT_ILOCKED) == 0 || | |
936 | XFS_ISLOCKED_INODE_EXCL(ip)); | |
937 | ||
938 | if (! (flags & XFS_QMOPT_ILOCKED)) | |
939 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
940 | ||
941 | if (XFS_IS_UQUOTA_ON(mp)) { | |
942 | error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER, | |
943 | flags & XFS_QMOPT_DQALLOC, | |
944 | flags & XFS_QMOPT_DQLOCK, | |
945 | NULL, &ip->i_udquot); | |
946 | if (error) | |
947 | goto done; | |
948 | nquotas++; | |
949 | } | |
950 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
c8ad20ff NS |
951 | if (XFS_IS_OQUOTA_ON(mp)) { |
952 | error = XFS_IS_GQUOTA_ON(mp) ? | |
953 | xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP, | |
954 | flags & XFS_QMOPT_DQALLOC, | |
955 | flags & XFS_QMOPT_DQLOCK, | |
956 | ip->i_udquot, &ip->i_gdquot) : | |
957 | xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ, | |
1da177e4 LT |
958 | flags & XFS_QMOPT_DQALLOC, |
959 | flags & XFS_QMOPT_DQLOCK, | |
960 | ip->i_udquot, &ip->i_gdquot); | |
961 | /* | |
962 | * Don't worry about the udquot that we may have | |
963 | * attached above. It'll get detached, if not already. | |
964 | */ | |
965 | if (error) | |
966 | goto done; | |
967 | nquotas++; | |
968 | } | |
969 | ||
970 | /* | |
971 | * Attach this group quota to the user quota as a hint. | |
972 | * This WON'T, in general, result in a thrash. | |
973 | */ | |
974 | if (nquotas == 2) { | |
975 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
976 | ASSERT(ip->i_udquot); | |
977 | ASSERT(ip->i_gdquot); | |
978 | ||
979 | /* | |
980 | * We may or may not have the i_udquot locked at this point, | |
981 | * but this check is OK since we don't depend on the i_gdquot to | |
982 | * be accurate 100% all the time. It is just a hint, and this | |
983 | * will succeed in general. | |
984 | */ | |
985 | if (ip->i_udquot->q_gdquot == ip->i_gdquot) | |
986 | goto done; | |
987 | /* | |
988 | * Attach i_gdquot to the gdquot hint inside the i_udquot. | |
989 | */ | |
990 | xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot, | |
991 | flags & XFS_QMOPT_DQLOCK); | |
992 | } | |
993 | ||
994 | done: | |
995 | ||
996 | #ifdef QUOTADEBUG | |
997 | if (! error) { | |
998 | if (ip->i_udquot) { | |
999 | if (flags & XFS_QMOPT_DQLOCK) | |
1000 | ASSERT(XFS_DQ_IS_LOCKED(ip->i_udquot)); | |
1001 | } | |
1002 | if (ip->i_gdquot) { | |
1003 | if (flags & XFS_QMOPT_DQLOCK) | |
1004 | ASSERT(XFS_DQ_IS_LOCKED(ip->i_gdquot)); | |
1005 | } | |
1006 | if (XFS_IS_UQUOTA_ON(mp)) | |
1007 | ASSERT(ip->i_udquot); | |
c8ad20ff | 1008 | if (XFS_IS_OQUOTA_ON(mp)) |
1da177e4 LT |
1009 | ASSERT(ip->i_gdquot); |
1010 | } | |
1011 | #endif | |
1012 | ||
1013 | if (! (flags & XFS_QMOPT_ILOCKED)) | |
1014 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1015 | ||
1016 | #ifdef QUOTADEBUG | |
1017 | else | |
1018 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
1019 | #endif | |
1020 | return (error); | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * Release dquots (and their references) if any. | |
1025 | * The inode should be locked EXCL except when this's called by | |
1026 | * xfs_ireclaim. | |
1027 | */ | |
1028 | void | |
1029 | xfs_qm_dqdetach( | |
1030 | xfs_inode_t *ip) | |
1031 | { | |
1032 | if (!(ip->i_udquot || ip->i_gdquot)) | |
1033 | return; | |
1034 | ||
1035 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino); | |
1036 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino); | |
1da177e4 | 1037 | if (ip->i_udquot) { |
c8ad20ff | 1038 | xfs_dqtrace_entry_ino(ip->i_udquot, "DQDETTACH", ip); |
1da177e4 LT |
1039 | xfs_qm_dqrele(ip->i_udquot); |
1040 | ip->i_udquot = NULL; | |
1041 | } | |
1042 | if (ip->i_gdquot) { | |
c8ad20ff | 1043 | xfs_dqtrace_entry_ino(ip->i_gdquot, "DQDETTACH", ip); |
1da177e4 LT |
1044 | xfs_qm_dqrele(ip->i_gdquot); |
1045 | ip->i_gdquot = NULL; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * This is called by VFS_SYNC and flags arg determines the caller, | |
1051 | * and its motives, as done in xfs_sync. | |
1052 | * | |
1053 | * vfs_sync: SYNC_FSDATA|SYNC_ATTR|SYNC_BDFLUSH 0x31 | |
1054 | * syscall sync: SYNC_FSDATA|SYNC_ATTR|SYNC_DELWRI 0x25 | |
1055 | * umountroot : SYNC_WAIT | SYNC_CLOSE | SYNC_ATTR | SYNC_FSDATA | |
1056 | */ | |
1057 | ||
1058 | int | |
1059 | xfs_qm_sync( | |
1060 | xfs_mount_t *mp, | |
1061 | short flags) | |
1062 | { | |
1063 | int recl, restarts; | |
1064 | xfs_dquot_t *dqp; | |
1065 | uint flush_flags; | |
1066 | boolean_t nowait; | |
1067 | int error; | |
1068 | ||
1069 | restarts = 0; | |
1070 | /* | |
1071 | * We won't block unless we are asked to. | |
1072 | */ | |
1073 | nowait = (boolean_t)(flags & SYNC_BDFLUSH || (flags & SYNC_WAIT) == 0); | |
1074 | ||
1075 | again: | |
1076 | xfs_qm_mplist_lock(mp); | |
1077 | /* | |
1078 | * dqpurge_all() also takes the mplist lock and iterate thru all dquots | |
1079 | * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared | |
1080 | * when we have the mplist lock, we know that dquots will be consistent | |
1081 | * as long as we have it locked. | |
1082 | */ | |
1083 | if (! XFS_IS_QUOTA_ON(mp)) { | |
1084 | xfs_qm_mplist_unlock(mp); | |
1085 | return (0); | |
1086 | } | |
1087 | FOREACH_DQUOT_IN_MP(dqp, mp) { | |
1088 | /* | |
1089 | * If this is vfs_sync calling, then skip the dquots that | |
1090 | * don't 'seem' to be dirty. ie. don't acquire dqlock. | |
1091 | * This is very similar to what xfs_sync does with inodes. | |
1092 | */ | |
1093 | if (flags & SYNC_BDFLUSH) { | |
1094 | if (! XFS_DQ_IS_DIRTY(dqp)) | |
1095 | continue; | |
1096 | } | |
1097 | ||
1098 | if (nowait) { | |
1099 | /* | |
1100 | * Try to acquire the dquot lock. We are NOT out of | |
1101 | * lock order, but we just don't want to wait for this | |
1102 | * lock, unless somebody wanted us to. | |
1103 | */ | |
1104 | if (! xfs_qm_dqlock_nowait(dqp)) | |
1105 | continue; | |
1106 | } else { | |
1107 | xfs_dqlock(dqp); | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Now, find out for sure if this dquot is dirty or not. | |
1112 | */ | |
1113 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
1114 | xfs_dqunlock(dqp); | |
1115 | continue; | |
1116 | } | |
1117 | ||
1118 | /* XXX a sentinel would be better */ | |
1119 | recl = XFS_QI_MPLRECLAIMS(mp); | |
1120 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
1121 | if (nowait) { | |
1122 | xfs_dqunlock(dqp); | |
1123 | continue; | |
1124 | } | |
1125 | /* | |
1126 | * If we can't grab the flush lock then if the caller | |
1127 | * really wanted us to give this our best shot, | |
1128 | * see if we can give a push to the buffer before we wait | |
1129 | * on the flush lock. At this point, we know that | |
1130 | * eventhough the dquot is being flushed, | |
1131 | * it has (new) dirty data. | |
1132 | */ | |
1133 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
1134 | } | |
1135 | /* | |
1136 | * Let go of the mplist lock. We don't want to hold it | |
1137 | * across a disk write | |
1138 | */ | |
1139 | flush_flags = (nowait) ? XFS_QMOPT_DELWRI : XFS_QMOPT_SYNC; | |
1140 | xfs_qm_mplist_unlock(mp); | |
1141 | xfs_dqtrace_entry(dqp, "XQM_SYNC: DQFLUSH"); | |
1142 | error = xfs_qm_dqflush(dqp, flush_flags); | |
1143 | xfs_dqunlock(dqp); | |
1144 | if (error && XFS_FORCED_SHUTDOWN(mp)) | |
1145 | return(0); /* Need to prevent umount failure */ | |
1146 | else if (error) | |
1147 | return (error); | |
1148 | ||
1149 | xfs_qm_mplist_lock(mp); | |
1150 | if (recl != XFS_QI_MPLRECLAIMS(mp)) { | |
1151 | if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS) | |
1152 | break; | |
1153 | ||
1154 | xfs_qm_mplist_unlock(mp); | |
1155 | goto again; | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | xfs_qm_mplist_unlock(mp); | |
1160 | return (0); | |
1161 | } | |
1162 | ||
1163 | ||
1164 | /* | |
1165 | * This initializes all the quota information that's kept in the | |
1166 | * mount structure | |
1167 | */ | |
ba0f32d4 | 1168 | STATIC int |
1da177e4 LT |
1169 | xfs_qm_init_quotainfo( |
1170 | xfs_mount_t *mp) | |
1171 | { | |
1172 | xfs_quotainfo_t *qinf; | |
1173 | int error; | |
1174 | xfs_dquot_t *dqp; | |
1175 | ||
1176 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1177 | ||
1178 | /* | |
1179 | * Tell XQM that we exist as soon as possible. | |
1180 | */ | |
1181 | if ((error = xfs_qm_hold_quotafs_ref(mp))) { | |
1182 | return (error); | |
1183 | } | |
1184 | ||
1185 | qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP); | |
1186 | ||
1187 | /* | |
1188 | * See if quotainodes are setup, and if not, allocate them, | |
1189 | * and change the superblock accordingly. | |
1190 | */ | |
1191 | if ((error = xfs_qm_init_quotainos(mp))) { | |
1192 | kmem_free(qinf, sizeof(xfs_quotainfo_t)); | |
1193 | mp->m_quotainfo = NULL; | |
1194 | return (error); | |
1195 | } | |
1196 | ||
1197 | spinlock_init(&qinf->qi_pinlock, "xfs_qinf_pin"); | |
1198 | xfs_qm_list_init(&qinf->qi_dqlist, "mpdqlist", 0); | |
1199 | qinf->qi_dqreclaims = 0; | |
1200 | ||
1201 | /* mutex used to serialize quotaoffs */ | |
1202 | mutex_init(&qinf->qi_quotaofflock, MUTEX_DEFAULT, "qoff"); | |
1203 | ||
1204 | /* Precalc some constants */ | |
1205 | qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1206 | ASSERT(qinf->qi_dqchunklen); | |
1207 | qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen); | |
1208 | do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t)); | |
1209 | ||
1210 | mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD); | |
1211 | ||
1212 | /* | |
1213 | * We try to get the limits from the superuser's limits fields. | |
1214 | * This is quite hacky, but it is standard quota practice. | |
1215 | * We look at the USR dquot with id == 0 first, but if user quotas | |
1216 | * are not enabled we goto the GRP dquot with id == 0. | |
1217 | * We don't really care to keep separate default limits for user | |
1218 | * and group quotas, at least not at this point. | |
1219 | */ | |
1220 | error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0, | |
c8ad20ff NS |
1221 | XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER : |
1222 | (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP : | |
1223 | XFS_DQ_PROJ), | |
1da177e4 LT |
1224 | XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN, |
1225 | &dqp); | |
1226 | if (! error) { | |
1227 | xfs_disk_dquot_t *ddqp = &dqp->q_core; | |
1228 | ||
1229 | /* | |
1230 | * The warnings and timers set the grace period given to | |
1231 | * a user or group before he or she can not perform any | |
1232 | * more writing. If it is zero, a default is used. | |
1233 | */ | |
1234 | qinf->qi_btimelimit = | |
1235 | INT_GET(ddqp->d_btimer, ARCH_CONVERT) ? | |
1236 | INT_GET(ddqp->d_btimer, ARCH_CONVERT) : | |
1237 | XFS_QM_BTIMELIMIT; | |
1238 | qinf->qi_itimelimit = | |
1239 | INT_GET(ddqp->d_itimer, ARCH_CONVERT) ? | |
1240 | INT_GET(ddqp->d_itimer, ARCH_CONVERT) : | |
1241 | XFS_QM_ITIMELIMIT; | |
1242 | qinf->qi_rtbtimelimit = | |
1243 | INT_GET(ddqp->d_rtbtimer, ARCH_CONVERT) ? | |
1244 | INT_GET(ddqp->d_rtbtimer, ARCH_CONVERT) : | |
1245 | XFS_QM_RTBTIMELIMIT; | |
1246 | qinf->qi_bwarnlimit = | |
1247 | INT_GET(ddqp->d_bwarns, ARCH_CONVERT) ? | |
1248 | INT_GET(ddqp->d_bwarns, ARCH_CONVERT) : | |
1249 | XFS_QM_BWARNLIMIT; | |
1250 | qinf->qi_iwarnlimit = | |
1251 | INT_GET(ddqp->d_iwarns, ARCH_CONVERT) ? | |
1252 | INT_GET(ddqp->d_iwarns, ARCH_CONVERT) : | |
1253 | XFS_QM_IWARNLIMIT; | |
1254 | qinf->qi_bhardlimit = | |
1255 | INT_GET(ddqp->d_blk_hardlimit, ARCH_CONVERT); | |
1256 | qinf->qi_bsoftlimit = | |
1257 | INT_GET(ddqp->d_blk_softlimit, ARCH_CONVERT); | |
1258 | qinf->qi_ihardlimit = | |
1259 | INT_GET(ddqp->d_ino_hardlimit, ARCH_CONVERT); | |
1260 | qinf->qi_isoftlimit = | |
1261 | INT_GET(ddqp->d_ino_softlimit, ARCH_CONVERT); | |
1262 | qinf->qi_rtbhardlimit = | |
1263 | INT_GET(ddqp->d_rtb_hardlimit, ARCH_CONVERT); | |
1264 | qinf->qi_rtbsoftlimit = | |
1265 | INT_GET(ddqp->d_rtb_softlimit, ARCH_CONVERT); | |
1266 | ||
1267 | /* | |
1268 | * We sent the XFS_QMOPT_DQSUSER flag to dqget because | |
1269 | * we don't want this dquot cached. We haven't done a | |
1270 | * quotacheck yet, and quotacheck doesn't like incore dquots. | |
1271 | */ | |
1272 | xfs_qm_dqdestroy(dqp); | |
1273 | } else { | |
1274 | qinf->qi_btimelimit = XFS_QM_BTIMELIMIT; | |
1275 | qinf->qi_itimelimit = XFS_QM_ITIMELIMIT; | |
1276 | qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT; | |
1277 | qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT; | |
1278 | qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT; | |
1279 | } | |
1280 | ||
1281 | return (0); | |
1282 | } | |
1283 | ||
1284 | ||
1285 | /* | |
1286 | * Gets called when unmounting a filesystem or when all quotas get | |
1287 | * turned off. | |
1288 | * This purges the quota inodes, destroys locks and frees itself. | |
1289 | */ | |
1290 | void | |
1291 | xfs_qm_destroy_quotainfo( | |
1292 | xfs_mount_t *mp) | |
1293 | { | |
1294 | xfs_quotainfo_t *qi; | |
1295 | ||
1296 | qi = mp->m_quotainfo; | |
1297 | ASSERT(qi != NULL); | |
1298 | ASSERT(xfs_Gqm != NULL); | |
1299 | ||
1300 | /* | |
1301 | * Release the reference that XQM kept, so that we know | |
1302 | * when the XQM structure should be freed. We cannot assume | |
1303 | * that xfs_Gqm is non-null after this point. | |
1304 | */ | |
1305 | xfs_qm_rele_quotafs_ref(mp); | |
1306 | ||
1307 | spinlock_destroy(&qi->qi_pinlock); | |
1308 | xfs_qm_list_destroy(&qi->qi_dqlist); | |
1309 | ||
1310 | if (qi->qi_uquotaip) { | |
1311 | XFS_PURGE_INODE(qi->qi_uquotaip); | |
1312 | qi->qi_uquotaip = NULL; /* paranoia */ | |
1313 | } | |
1314 | if (qi->qi_gquotaip) { | |
1315 | XFS_PURGE_INODE(qi->qi_gquotaip); | |
1316 | qi->qi_gquotaip = NULL; | |
1317 | } | |
1318 | mutex_destroy(&qi->qi_quotaofflock); | |
1319 | kmem_free(qi, sizeof(xfs_quotainfo_t)); | |
1320 | mp->m_quotainfo = NULL; | |
1321 | } | |
1322 | ||
1323 | ||
1324 | ||
1325 | /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */ | |
1326 | ||
1327 | /* ARGSUSED */ | |
1328 | STATIC void | |
1329 | xfs_qm_list_init( | |
1330 | xfs_dqlist_t *list, | |
1331 | char *str, | |
1332 | int n) | |
1333 | { | |
1334 | mutex_init(&list->qh_lock, MUTEX_DEFAULT, str); | |
1335 | list->qh_next = NULL; | |
1336 | list->qh_version = 0; | |
1337 | list->qh_nelems = 0; | |
1338 | } | |
1339 | ||
1340 | STATIC void | |
1341 | xfs_qm_list_destroy( | |
1342 | xfs_dqlist_t *list) | |
1343 | { | |
1344 | mutex_destroy(&(list->qh_lock)); | |
1345 | } | |
1346 | ||
1347 | ||
1348 | /* | |
1349 | * Stripped down version of dqattach. This doesn't attach, or even look at the | |
1350 | * dquots attached to the inode. The rationale is that there won't be any | |
1351 | * attached at the time this is called from quotacheck. | |
1352 | */ | |
1353 | STATIC int | |
1354 | xfs_qm_dqget_noattach( | |
1355 | xfs_inode_t *ip, | |
1356 | xfs_dquot_t **O_udqpp, | |
1357 | xfs_dquot_t **O_gdqpp) | |
1358 | { | |
1359 | int error; | |
1360 | xfs_mount_t *mp; | |
1361 | xfs_dquot_t *udqp, *gdqp; | |
1362 | ||
1363 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
1364 | mp = ip->i_mount; | |
1365 | udqp = NULL; | |
1366 | gdqp = NULL; | |
1367 | ||
1368 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1369 | ASSERT(ip->i_udquot == NULL); | |
1370 | /* | |
1371 | * We want the dquot allocated if it doesn't exist. | |
1372 | */ | |
1373 | if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER, | |
1374 | XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, | |
1375 | &udqp))) { | |
1376 | /* | |
1377 | * Shouldn't be able to turn off quotas here. | |
1378 | */ | |
1379 | ASSERT(error != ESRCH); | |
1380 | ASSERT(error != ENOENT); | |
1381 | return (error); | |
1382 | } | |
1383 | ASSERT(udqp); | |
1384 | } | |
1385 | ||
c8ad20ff | 1386 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1387 | ASSERT(ip->i_gdquot == NULL); |
1388 | if (udqp) | |
1389 | xfs_dqunlock(udqp); | |
c8ad20ff NS |
1390 | error = XFS_IS_GQUOTA_ON(mp) ? |
1391 | xfs_qm_dqget(mp, ip, | |
1392 | ip->i_d.di_gid, XFS_DQ_GROUP, | |
1393 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1394 | &gdqp) : | |
1395 | xfs_qm_dqget(mp, ip, | |
1396 | ip->i_d.di_projid, XFS_DQ_PROJ, | |
1397 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1398 | &gdqp); | |
1399 | if (error) { | |
1da177e4 LT |
1400 | if (udqp) |
1401 | xfs_qm_dqrele(udqp); | |
1402 | ASSERT(error != ESRCH); | |
1403 | ASSERT(error != ENOENT); | |
1404 | return (error); | |
1405 | } | |
1406 | ASSERT(gdqp); | |
1407 | ||
1408 | /* Reacquire the locks in the right order */ | |
1409 | if (udqp) { | |
1410 | if (! xfs_qm_dqlock_nowait(udqp)) { | |
1411 | xfs_dqunlock(gdqp); | |
1412 | xfs_dqlock(udqp); | |
1413 | xfs_dqlock(gdqp); | |
1414 | } | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | *O_udqpp = udqp; | |
1419 | *O_gdqpp = gdqp; | |
1420 | ||
1421 | #ifdef QUOTADEBUG | |
1422 | if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp)); | |
1423 | if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp)); | |
1424 | #endif | |
1425 | return (0); | |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * Create an inode and return with a reference already taken, but unlocked | |
1430 | * This is how we create quota inodes | |
1431 | */ | |
1432 | STATIC int | |
1433 | xfs_qm_qino_alloc( | |
1434 | xfs_mount_t *mp, | |
1435 | xfs_inode_t **ip, | |
1436 | __int64_t sbfields, | |
1437 | uint flags) | |
1438 | { | |
1439 | xfs_trans_t *tp; | |
1440 | int error; | |
1441 | unsigned long s; | |
1442 | cred_t zerocr; | |
1443 | int committed; | |
1444 | ||
1445 | tp = xfs_trans_alloc(mp,XFS_TRANS_QM_QINOCREATE); | |
1446 | if ((error = xfs_trans_reserve(tp, | |
1447 | XFS_QM_QINOCREATE_SPACE_RES(mp), | |
1448 | XFS_CREATE_LOG_RES(mp), 0, | |
1449 | XFS_TRANS_PERM_LOG_RES, | |
1450 | XFS_CREATE_LOG_COUNT))) { | |
1451 | xfs_trans_cancel(tp, 0); | |
1452 | return (error); | |
1453 | } | |
1454 | memset(&zerocr, 0, sizeof(zerocr)); | |
1455 | ||
1456 | if ((error = xfs_dir_ialloc(&tp, mp->m_rootip, S_IFREG, 1, 0, | |
1457 | &zerocr, 0, 1, ip, &committed))) { | |
1458 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | | |
1459 | XFS_TRANS_ABORT); | |
1460 | return (error); | |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * Keep an extra reference to this quota inode. This inode is | |
1465 | * locked exclusively and joined to the transaction already. | |
1466 | */ | |
1467 | ASSERT(XFS_ISLOCKED_INODE_EXCL(*ip)); | |
1468 | VN_HOLD(XFS_ITOV((*ip))); | |
1469 | ||
1470 | /* | |
1471 | * Make the changes in the superblock, and log those too. | |
1472 | * sbfields arg may contain fields other than *QUOTINO; | |
1473 | * VERSIONNUM for example. | |
1474 | */ | |
1475 | s = XFS_SB_LOCK(mp); | |
1476 | if (flags & XFS_QMOPT_SBVERSION) { | |
1477 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1478 | unsigned oldv = mp->m_sb.sb_versionnum; | |
1479 | #endif | |
1480 | ASSERT(!XFS_SB_VERSION_HASQUOTA(&mp->m_sb)); | |
1481 | ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1482 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) == | |
1483 | (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1484 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)); | |
1485 | ||
1486 | XFS_SB_VERSION_ADDQUOTA(&mp->m_sb); | |
1487 | mp->m_sb.sb_uquotino = NULLFSINO; | |
1488 | mp->m_sb.sb_gquotino = NULLFSINO; | |
1489 | ||
1490 | /* qflags will get updated _after_ quotacheck */ | |
1491 | mp->m_sb.sb_qflags = 0; | |
1492 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1493 | cmn_err(CE_NOTE, | |
1494 | "Old superblock version %x, converting to %x.", | |
1495 | oldv, mp->m_sb.sb_versionnum); | |
1496 | #endif | |
1497 | } | |
1498 | if (flags & XFS_QMOPT_UQUOTA) | |
1499 | mp->m_sb.sb_uquotino = (*ip)->i_ino; | |
1500 | else | |
1501 | mp->m_sb.sb_gquotino = (*ip)->i_ino; | |
1502 | XFS_SB_UNLOCK(mp, s); | |
1503 | xfs_mod_sb(tp, sbfields); | |
1504 | ||
1505 | if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, | |
1506 | NULL))) { | |
1507 | xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!"); | |
1508 | return (error); | |
1509 | } | |
1510 | return (0); | |
1511 | } | |
1512 | ||
1513 | ||
1514 | STATIC int | |
1515 | xfs_qm_reset_dqcounts( | |
1516 | xfs_mount_t *mp, | |
1517 | xfs_buf_t *bp, | |
1518 | xfs_dqid_t id, | |
1519 | uint type) | |
1520 | { | |
1521 | xfs_disk_dquot_t *ddq; | |
1522 | int j; | |
1523 | ||
1524 | xfs_buftrace("RESET DQUOTS", bp); | |
1525 | /* | |
1526 | * Reset all counters and timers. They'll be | |
1527 | * started afresh by xfs_qm_quotacheck. | |
1528 | */ | |
1529 | #ifdef DEBUG | |
1530 | j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1531 | do_div(j, sizeof(xfs_dqblk_t)); | |
1532 | ASSERT(XFS_QM_DQPERBLK(mp) == j); | |
1533 | #endif | |
1534 | ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp); | |
1535 | for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) { | |
1536 | /* | |
1537 | * Do a sanity check, and if needed, repair the dqblk. Don't | |
1538 | * output any warnings because it's perfectly possible to | |
1539 | * find unitialized dquot blks. See comment in xfs_qm_dqcheck. | |
1540 | */ | |
1541 | (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR, | |
1542 | "xfs_quotacheck"); | |
1543 | INT_SET(ddq->d_bcount, ARCH_CONVERT, 0ULL); | |
1544 | INT_SET(ddq->d_icount, ARCH_CONVERT, 0ULL); | |
1545 | INT_SET(ddq->d_rtbcount, ARCH_CONVERT, 0ULL); | |
1546 | INT_SET(ddq->d_btimer, ARCH_CONVERT, (time_t)0); | |
1547 | INT_SET(ddq->d_itimer, ARCH_CONVERT, (time_t)0); | |
1548 | INT_SET(ddq->d_bwarns, ARCH_CONVERT, 0UL); | |
1549 | INT_SET(ddq->d_iwarns, ARCH_CONVERT, 0UL); | |
1550 | ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1); | |
1551 | } | |
1552 | ||
1553 | return (0); | |
1554 | } | |
1555 | ||
1556 | STATIC int | |
1557 | xfs_qm_dqiter_bufs( | |
1558 | xfs_mount_t *mp, | |
1559 | xfs_dqid_t firstid, | |
1560 | xfs_fsblock_t bno, | |
1561 | xfs_filblks_t blkcnt, | |
1562 | uint flags) | |
1563 | { | |
1564 | xfs_buf_t *bp; | |
1565 | int error; | |
1566 | int notcommitted; | |
1567 | int incr; | |
c8ad20ff | 1568 | int type; |
1da177e4 LT |
1569 | |
1570 | ASSERT(blkcnt > 0); | |
1571 | notcommitted = 0; | |
1572 | incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ? | |
1573 | XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt; | |
c8ad20ff NS |
1574 | type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER : |
1575 | (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP); | |
1da177e4 LT |
1576 | error = 0; |
1577 | ||
1578 | /* | |
1579 | * Blkcnt arg can be a very big number, and might even be | |
1580 | * larger than the log itself. So, we have to break it up into | |
1581 | * manageable-sized transactions. | |
1582 | * Note that we don't start a permanent transaction here; we might | |
1583 | * not be able to get a log reservation for the whole thing up front, | |
1584 | * and we don't really care to either, because we just discard | |
1585 | * everything if we were to crash in the middle of this loop. | |
1586 | */ | |
1587 | while (blkcnt--) { | |
1588 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, | |
1589 | XFS_FSB_TO_DADDR(mp, bno), | |
1590 | (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp); | |
1591 | if (error) | |
1592 | break; | |
1593 | ||
c8ad20ff | 1594 | (void) xfs_qm_reset_dqcounts(mp, bp, firstid, type); |
1da177e4 LT |
1595 | xfs_bdwrite(mp, bp); |
1596 | /* | |
1597 | * goto the next block. | |
1598 | */ | |
1599 | bno++; | |
1600 | firstid += XFS_QM_DQPERBLK(mp); | |
1601 | } | |
1602 | return (error); | |
1603 | } | |
1604 | ||
1605 | /* | |
c8ad20ff | 1606 | * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a |
1da177e4 LT |
1607 | * caller supplied function for every chunk of dquots that we find. |
1608 | */ | |
1609 | STATIC int | |
1610 | xfs_qm_dqiterate( | |
1611 | xfs_mount_t *mp, | |
1612 | xfs_inode_t *qip, | |
1613 | uint flags) | |
1614 | { | |
1615 | xfs_bmbt_irec_t *map; | |
1616 | int i, nmaps; /* number of map entries */ | |
1617 | int error; /* return value */ | |
1618 | xfs_fileoff_t lblkno; | |
1619 | xfs_filblks_t maxlblkcnt; | |
1620 | xfs_dqid_t firstid; | |
1621 | xfs_fsblock_t rablkno; | |
1622 | xfs_filblks_t rablkcnt; | |
1623 | ||
1624 | error = 0; | |
1625 | /* | |
1626 | * This looks racey, but we can't keep an inode lock across a | |
1627 | * trans_reserve. But, this gets called during quotacheck, and that | |
1628 | * happens only at mount time which is single threaded. | |
1629 | */ | |
1630 | if (qip->i_d.di_nblocks == 0) | |
1631 | return (0); | |
1632 | ||
1633 | map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP); | |
1634 | ||
1635 | lblkno = 0; | |
1636 | maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); | |
1637 | do { | |
1638 | nmaps = XFS_DQITER_MAP_SIZE; | |
1639 | /* | |
1640 | * We aren't changing the inode itself. Just changing | |
1641 | * some of its data. No new blocks are added here, and | |
1642 | * the inode is never added to the transaction. | |
1643 | */ | |
1644 | xfs_ilock(qip, XFS_ILOCK_SHARED); | |
1645 | error = xfs_bmapi(NULL, qip, lblkno, | |
1646 | maxlblkcnt - lblkno, | |
1647 | XFS_BMAPI_METADATA, | |
1648 | NULL, | |
1649 | 0, map, &nmaps, NULL); | |
1650 | xfs_iunlock(qip, XFS_ILOCK_SHARED); | |
1651 | if (error) | |
1652 | break; | |
1653 | ||
1654 | ASSERT(nmaps <= XFS_DQITER_MAP_SIZE); | |
1655 | for (i = 0; i < nmaps; i++) { | |
1656 | ASSERT(map[i].br_startblock != DELAYSTARTBLOCK); | |
1657 | ASSERT(map[i].br_blockcount); | |
1658 | ||
1659 | ||
1660 | lblkno += map[i].br_blockcount; | |
1661 | ||
1662 | if (map[i].br_startblock == HOLESTARTBLOCK) | |
1663 | continue; | |
1664 | ||
1665 | firstid = (xfs_dqid_t) map[i].br_startoff * | |
1666 | XFS_QM_DQPERBLK(mp); | |
1667 | /* | |
1668 | * Do a read-ahead on the next extent. | |
1669 | */ | |
1670 | if ((i+1 < nmaps) && | |
1671 | (map[i+1].br_startblock != HOLESTARTBLOCK)) { | |
1672 | rablkcnt = map[i+1].br_blockcount; | |
1673 | rablkno = map[i+1].br_startblock; | |
1674 | while (rablkcnt--) { | |
1675 | xfs_baread(mp->m_ddev_targp, | |
1676 | XFS_FSB_TO_DADDR(mp, rablkno), | |
1677 | (int)XFS_QI_DQCHUNKLEN(mp)); | |
1678 | rablkno++; | |
1679 | } | |
1680 | } | |
1681 | /* | |
1682 | * Iterate thru all the blks in the extent and | |
1683 | * reset the counters of all the dquots inside them. | |
1684 | */ | |
1685 | if ((error = xfs_qm_dqiter_bufs(mp, | |
1686 | firstid, | |
1687 | map[i].br_startblock, | |
1688 | map[i].br_blockcount, | |
1689 | flags))) { | |
1690 | break; | |
1691 | } | |
1692 | } | |
1693 | ||
1694 | if (error) | |
1695 | break; | |
1696 | } while (nmaps > 0); | |
1697 | ||
1698 | kmem_free(map, XFS_DQITER_MAP_SIZE * sizeof(*map)); | |
1699 | ||
1700 | return (error); | |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * Called by dqusage_adjust in doing a quotacheck. | |
1705 | * Given the inode, and a dquot (either USR or GRP, doesn't matter), | |
1706 | * this updates its incore copy as well as the buffer copy. This is | |
1707 | * so that once the quotacheck is done, we can just log all the buffers, | |
1708 | * as opposed to logging numerous updates to individual dquots. | |
1709 | */ | |
1710 | STATIC void | |
1711 | xfs_qm_quotacheck_dqadjust( | |
1712 | xfs_dquot_t *dqp, | |
1713 | xfs_qcnt_t nblks, | |
1714 | xfs_qcnt_t rtblks) | |
1715 | { | |
1716 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
1717 | xfs_dqtrace_entry(dqp, "QCHECK DQADJUST"); | |
1718 | /* | |
1719 | * Adjust the inode count and the block count to reflect this inode's | |
1720 | * resource usage. | |
1721 | */ | |
1722 | INT_MOD(dqp->q_core.d_icount, ARCH_CONVERT, +1); | |
1723 | dqp->q_res_icount++; | |
1724 | if (nblks) { | |
1725 | INT_MOD(dqp->q_core.d_bcount, ARCH_CONVERT, nblks); | |
1726 | dqp->q_res_bcount += nblks; | |
1727 | } | |
1728 | if (rtblks) { | |
1729 | INT_MOD(dqp->q_core.d_rtbcount, ARCH_CONVERT, rtblks); | |
1730 | dqp->q_res_rtbcount += rtblks; | |
1731 | } | |
1732 | ||
1733 | /* | |
1734 | * Set default limits, adjust timers (since we changed usages) | |
1735 | */ | |
1736 | if (! XFS_IS_SUSER_DQUOT(dqp)) { | |
1737 | xfs_qm_adjust_dqlimits(dqp->q_mount, &dqp->q_core); | |
1738 | xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core); | |
1739 | } | |
1740 | ||
1741 | dqp->dq_flags |= XFS_DQ_DIRTY; | |
1742 | } | |
1743 | ||
1744 | STATIC int | |
1745 | xfs_qm_get_rtblks( | |
1746 | xfs_inode_t *ip, | |
1747 | xfs_qcnt_t *O_rtblks) | |
1748 | { | |
1749 | xfs_filblks_t rtblks; /* total rt blks */ | |
1750 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1751 | xfs_extnum_t nextents; /* number of extent entries */ | |
1752 | xfs_bmbt_rec_t *base; /* base of extent array */ | |
1753 | xfs_bmbt_rec_t *ep; /* pointer to an extent entry */ | |
1754 | int error; | |
1755 | ||
1756 | ASSERT(XFS_IS_REALTIME_INODE(ip)); | |
1757 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
1758 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1759 | if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK))) | |
1760 | return (error); | |
1761 | } | |
1762 | rtblks = 0; | |
1763 | nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); | |
1764 | base = &ifp->if_u1.if_extents[0]; | |
1765 | for (ep = base; ep < &base[nextents]; ep++) | |
1766 | rtblks += xfs_bmbt_get_blockcount(ep); | |
1767 | *O_rtblks = (xfs_qcnt_t)rtblks; | |
1768 | return (0); | |
1769 | } | |
1770 | ||
1771 | /* | |
1772 | * callback routine supplied to bulkstat(). Given an inumber, find its | |
1773 | * dquots and update them to account for resources taken by that inode. | |
1774 | */ | |
1775 | /* ARGSUSED */ | |
1776 | STATIC int | |
1777 | xfs_qm_dqusage_adjust( | |
1778 | xfs_mount_t *mp, /* mount point for filesystem */ | |
1779 | xfs_ino_t ino, /* inode number to get data for */ | |
1780 | void __user *buffer, /* not used */ | |
1781 | int ubsize, /* not used */ | |
1782 | void *private_data, /* not used */ | |
1783 | xfs_daddr_t bno, /* starting block of inode cluster */ | |
1784 | int *ubused, /* not used */ | |
1785 | void *dip, /* on-disk inode pointer (not used) */ | |
1786 | int *res) /* result code value */ | |
1787 | { | |
1788 | xfs_inode_t *ip; | |
1789 | xfs_dquot_t *udqp, *gdqp; | |
1790 | xfs_qcnt_t nblks, rtblks; | |
1791 | int error; | |
1792 | ||
1793 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1794 | ||
1795 | /* | |
1796 | * rootino must have its resources accounted for, not so with the quota | |
1797 | * inodes. | |
1798 | */ | |
1799 | if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) { | |
1800 | *res = BULKSTAT_RV_NOTHING; | |
1801 | return XFS_ERROR(EINVAL); | |
1802 | } | |
1803 | ||
1804 | /* | |
1805 | * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget | |
1806 | * interface expects the inode to be exclusively locked because that's | |
1807 | * the case in all other instances. It's OK that we do this because | |
1808 | * quotacheck is done only at mount time. | |
1809 | */ | |
1810 | if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) { | |
1811 | *res = BULKSTAT_RV_NOTHING; | |
1812 | return (error); | |
1813 | } | |
1814 | ||
1815 | if (ip->i_d.di_mode == 0) { | |
1816 | xfs_iput_new(ip, XFS_ILOCK_EXCL); | |
1817 | *res = BULKSTAT_RV_NOTHING; | |
1818 | return XFS_ERROR(ENOENT); | |
1819 | } | |
1820 | ||
1821 | /* | |
1822 | * Obtain the locked dquots. In case of an error (eg. allocation | |
1823 | * fails for ENOSPC), we return the negative of the error number | |
1824 | * to bulkstat, so that it can get propagated to quotacheck() and | |
1825 | * making us disable quotas for the file system. | |
1826 | */ | |
1827 | if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) { | |
1828 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1829 | *res = BULKSTAT_RV_GIVEUP; | |
1830 | return (error); | |
1831 | } | |
1832 | ||
1833 | rtblks = 0; | |
1834 | if (! XFS_IS_REALTIME_INODE(ip)) { | |
1835 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks; | |
1836 | } else { | |
1837 | /* | |
1838 | * Walk thru the extent list and count the realtime blocks. | |
1839 | */ | |
1840 | if ((error = xfs_qm_get_rtblks(ip, &rtblks))) { | |
1841 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1842 | if (udqp) | |
1843 | xfs_qm_dqput(udqp); | |
1844 | if (gdqp) | |
1845 | xfs_qm_dqput(gdqp); | |
1846 | *res = BULKSTAT_RV_GIVEUP; | |
1847 | return (error); | |
1848 | } | |
1849 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks; | |
1850 | } | |
1851 | ASSERT(ip->i_delayed_blks == 0); | |
1852 | ||
1853 | /* | |
1854 | * We can't release the inode while holding its dquot locks. | |
1855 | * The inode can go into inactive and might try to acquire the dquotlocks. | |
1856 | * So, just unlock here and do a vn_rele at the end. | |
1857 | */ | |
1858 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1859 | ||
1860 | /* | |
1861 | * Add the (disk blocks and inode) resources occupied by this | |
1862 | * inode to its dquots. We do this adjustment in the incore dquot, | |
1863 | * and also copy the changes to its buffer. | |
1864 | * We don't care about putting these changes in a transaction | |
1865 | * envelope because if we crash in the middle of a 'quotacheck' | |
1866 | * we have to start from the beginning anyway. | |
1867 | * Once we're done, we'll log all the dquot bufs. | |
1868 | * | |
1869 | * The *QUOTA_ON checks below may look pretty racey, but quotachecks | |
1870 | * and quotaoffs don't race. (Quotachecks happen at mount time only). | |
1871 | */ | |
1872 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1873 | ASSERT(udqp); | |
1874 | xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks); | |
1875 | xfs_qm_dqput(udqp); | |
1876 | } | |
c8ad20ff | 1877 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1878 | ASSERT(gdqp); |
1879 | xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks); | |
1880 | xfs_qm_dqput(gdqp); | |
1881 | } | |
1882 | /* | |
1883 | * Now release the inode. This will send it to 'inactive', and | |
1884 | * possibly even free blocks. | |
1885 | */ | |
1886 | VN_RELE(XFS_ITOV(ip)); | |
1887 | ||
1888 | /* | |
1889 | * Goto next inode. | |
1890 | */ | |
1891 | *res = BULKSTAT_RV_DIDONE; | |
1892 | return (0); | |
1893 | } | |
1894 | ||
1895 | /* | |
1896 | * Walk thru all the filesystem inodes and construct a consistent view | |
1897 | * of the disk quota world. If the quotacheck fails, disable quotas. | |
1898 | */ | |
1899 | int | |
1900 | xfs_qm_quotacheck( | |
1901 | xfs_mount_t *mp) | |
1902 | { | |
1903 | int done, count, error; | |
1904 | xfs_ino_t lastino; | |
1905 | size_t structsz; | |
1906 | xfs_inode_t *uip, *gip; | |
1907 | uint flags; | |
1908 | ||
1909 | count = INT_MAX; | |
1910 | structsz = 1; | |
1911 | lastino = 0; | |
1912 | flags = 0; | |
1913 | ||
1914 | ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp)); | |
1915 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1916 | ||
1917 | /* | |
1918 | * There should be no cached dquots. The (simplistic) quotacheck | |
1919 | * algorithm doesn't like that. | |
1920 | */ | |
1921 | ASSERT(XFS_QI_MPLNDQUOTS(mp) == 0); | |
1922 | ||
1923 | cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname); | |
1924 | ||
1925 | /* | |
c8ad20ff | 1926 | * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset |
1da177e4 LT |
1927 | * their counters to zero. We need a clean slate. |
1928 | * We don't log our changes till later. | |
1929 | */ | |
1930 | if ((uip = XFS_QI_UQIP(mp))) { | |
1931 | if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA))) | |
1932 | goto error_return; | |
1933 | flags |= XFS_UQUOTA_CHKD; | |
1934 | } | |
1935 | ||
1936 | if ((gip = XFS_QI_GQIP(mp))) { | |
c8ad20ff NS |
1937 | if ((error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ? |
1938 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA))) | |
1da177e4 | 1939 | goto error_return; |
c8ad20ff | 1940 | flags |= XFS_OQUOTA_CHKD; |
1da177e4 LT |
1941 | } |
1942 | ||
1943 | do { | |
1944 | /* | |
1945 | * Iterate thru all the inodes in the file system, | |
1946 | * adjusting the corresponding dquot counters in core. | |
1947 | */ | |
1948 | if ((error = xfs_bulkstat(mp, &lastino, &count, | |
1949 | xfs_qm_dqusage_adjust, NULL, | |
1950 | structsz, NULL, | |
1951 | BULKSTAT_FG_IGET|BULKSTAT_FG_VFSLOCKED, | |
1952 | &done))) | |
1953 | break; | |
1954 | ||
1955 | } while (! done); | |
1956 | ||
1957 | /* | |
1958 | * We can get this error if we couldn't do a dquot allocation inside | |
1959 | * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the | |
1960 | * dirty dquots that might be cached, we just want to get rid of them | |
1961 | * and turn quotaoff. The dquots won't be attached to any of the inodes | |
1962 | * at this point (because we intentionally didn't in dqget_noattach). | |
1963 | */ | |
1964 | if (error) { | |
1965 | xfs_qm_dqpurge_all(mp, | |
1966 | XFS_QMOPT_UQUOTA|XFS_QMOPT_GQUOTA| | |
c8ad20ff | 1967 | XFS_QMOPT_PQUOTA|XFS_QMOPT_QUOTAOFF); |
1da177e4 LT |
1968 | goto error_return; |
1969 | } | |
1970 | /* | |
1971 | * We've made all the changes that we need to make incore. | |
1972 | * Now flush_them down to disk buffers. | |
1973 | */ | |
1974 | xfs_qm_dqflush_all(mp, XFS_QMOPT_DELWRI); | |
1975 | ||
1976 | /* | |
1977 | * We didn't log anything, because if we crashed, we'll have to | |
1978 | * start the quotacheck from scratch anyway. However, we must make | |
1979 | * sure that our dquot changes are secure before we put the | |
1980 | * quotacheck'd stamp on the superblock. So, here we do a synchronous | |
1981 | * flush. | |
1982 | */ | |
1983 | XFS_bflush(mp->m_ddev_targp); | |
1984 | ||
1985 | /* | |
1986 | * If one type of quotas is off, then it will lose its | |
1987 | * quotachecked status, since we won't be doing accounting for | |
1988 | * that type anymore. | |
1989 | */ | |
c8ad20ff | 1990 | mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD); |
1da177e4 LT |
1991 | mp->m_qflags |= flags; |
1992 | ||
1993 | XQM_LIST_PRINT(&(XFS_QI_MPL_LIST(mp)), MPL_NEXT, "++++ Mp list +++"); | |
1994 | ||
1995 | error_return: | |
1996 | if (error) { | |
1997 | cmn_err(CE_WARN, "XFS quotacheck %s: Unsuccessful (Error %d): " | |
1998 | "Disabling quotas.", | |
1999 | mp->m_fsname, error); | |
2000 | /* | |
2001 | * We must turn off quotas. | |
2002 | */ | |
2003 | ASSERT(mp->m_quotainfo != NULL); | |
2004 | ASSERT(xfs_Gqm != NULL); | |
2005 | xfs_qm_destroy_quotainfo(mp); | |
2006 | xfs_mount_reset_sbqflags(mp); | |
2007 | } else { | |
2008 | cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname); | |
2009 | } | |
2010 | return (error); | |
2011 | } | |
2012 | ||
2013 | /* | |
2014 | * This is called after the superblock has been read in and we're ready to | |
2015 | * iget the quota inodes. | |
2016 | */ | |
2017 | STATIC int | |
2018 | xfs_qm_init_quotainos( | |
2019 | xfs_mount_t *mp) | |
2020 | { | |
2021 | xfs_inode_t *uip, *gip; | |
2022 | int error; | |
2023 | __int64_t sbflags; | |
2024 | uint flags; | |
2025 | ||
2026 | ASSERT(mp->m_quotainfo); | |
2027 | uip = gip = NULL; | |
2028 | sbflags = 0; | |
2029 | flags = 0; | |
2030 | ||
2031 | /* | |
2032 | * Get the uquota and gquota inodes | |
2033 | */ | |
2034 | if (XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) { | |
2035 | if (XFS_IS_UQUOTA_ON(mp) && | |
2036 | mp->m_sb.sb_uquotino != NULLFSINO) { | |
2037 | ASSERT(mp->m_sb.sb_uquotino > 0); | |
2038 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, | |
2039 | 0, 0, &uip, 0))) | |
2040 | return XFS_ERROR(error); | |
2041 | } | |
c8ad20ff | 2042 | if (XFS_IS_OQUOTA_ON(mp) && |
1da177e4 LT |
2043 | mp->m_sb.sb_gquotino != NULLFSINO) { |
2044 | ASSERT(mp->m_sb.sb_gquotino > 0); | |
2045 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, | |
2046 | 0, 0, &gip, 0))) { | |
2047 | if (uip) | |
2048 | VN_RELE(XFS_ITOV(uip)); | |
2049 | return XFS_ERROR(error); | |
2050 | } | |
2051 | } | |
2052 | } else { | |
2053 | flags |= XFS_QMOPT_SBVERSION; | |
2054 | sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
2055 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS); | |
2056 | } | |
2057 | ||
2058 | /* | |
2059 | * Create the two inodes, if they don't exist already. The changes | |
2060 | * made above will get added to a transaction and logged in one of | |
2061 | * the qino_alloc calls below. If the device is readonly, | |
2062 | * temporarily switch to read-write to do this. | |
2063 | */ | |
2064 | if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) { | |
2065 | if ((error = xfs_qm_qino_alloc(mp, &uip, | |
2066 | sbflags | XFS_SB_UQUOTINO, | |
2067 | flags | XFS_QMOPT_UQUOTA))) | |
2068 | return XFS_ERROR(error); | |
2069 | ||
2070 | flags &= ~XFS_QMOPT_SBVERSION; | |
2071 | } | |
c8ad20ff NS |
2072 | if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) { |
2073 | flags |= (XFS_IS_GQUOTA_ON(mp) ? | |
2074 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA); | |
2075 | error = xfs_qm_qino_alloc(mp, &gip, | |
2076 | sbflags | XFS_SB_GQUOTINO, flags); | |
2077 | if (error) { | |
1da177e4 LT |
2078 | if (uip) |
2079 | VN_RELE(XFS_ITOV(uip)); | |
2080 | ||
2081 | return XFS_ERROR(error); | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | XFS_QI_UQIP(mp) = uip; | |
2086 | XFS_QI_GQIP(mp) = gip; | |
2087 | ||
2088 | return (0); | |
2089 | } | |
2090 | ||
2091 | ||
2092 | /* | |
2093 | * Traverse the freelist of dquots and attempt to reclaim a maximum of | |
2094 | * 'howmany' dquots. This operation races with dqlookup(), and attempts to | |
2095 | * favor the lookup function ... | |
2096 | * XXXsup merge this with qm_reclaim_one(). | |
2097 | */ | |
2098 | STATIC int | |
2099 | xfs_qm_shake_freelist( | |
2100 | int howmany) | |
2101 | { | |
2102 | int nreclaimed; | |
2103 | xfs_dqhash_t *hash; | |
2104 | xfs_dquot_t *dqp, *nextdqp; | |
2105 | int restarts; | |
2106 | int nflushes; | |
2107 | ||
2108 | if (howmany <= 0) | |
2109 | return (0); | |
2110 | ||
2111 | nreclaimed = 0; | |
2112 | restarts = 0; | |
2113 | nflushes = 0; | |
2114 | ||
2115 | #ifdef QUOTADEBUG | |
2116 | cmn_err(CE_DEBUG, "Shake free 0x%x", howmany); | |
2117 | #endif | |
2118 | /* lock order is : hashchainlock, freelistlock, mplistlock */ | |
2119 | tryagain: | |
2120 | xfs_qm_freelist_lock(xfs_Gqm); | |
2121 | ||
2122 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
2123 | ((dqp != (xfs_dquot_t *) &xfs_Gqm->qm_dqfreelist) && | |
2124 | nreclaimed < howmany); ) { | |
2125 | xfs_dqlock(dqp); | |
2126 | ||
2127 | /* | |
2128 | * We are racing with dqlookup here. Naturally we don't | |
2129 | * want to reclaim a dquot that lookup wants. | |
2130 | */ | |
2131 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
2132 | xfs_dqunlock(dqp); | |
2133 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2134 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
2135 | return (nreclaimed); | |
2136 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); | |
2137 | goto tryagain; | |
2138 | } | |
2139 | ||
2140 | /* | |
2141 | * If the dquot is inactive, we are assured that it is | |
2142 | * not on the mplist or the hashlist, and that makes our | |
2143 | * life easier. | |
2144 | */ | |
2145 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
2146 | ASSERT(dqp->q_mount == NULL); | |
2147 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
2148 | ASSERT(dqp->HL_PREVP == NULL); | |
2149 | ASSERT(dqp->MPL_PREVP == NULL); | |
2150 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); | |
2151 | nextdqp = dqp->dq_flnext; | |
2152 | goto off_freelist; | |
2153 | } | |
2154 | ||
2155 | ASSERT(dqp->MPL_PREVP); | |
2156 | /* | |
2157 | * Try to grab the flush lock. If this dquot is in the process of | |
2158 | * getting flushed to disk, we don't want to reclaim it. | |
2159 | */ | |
2160 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
2161 | xfs_dqunlock(dqp); | |
2162 | dqp = dqp->dq_flnext; | |
2163 | continue; | |
2164 | } | |
2165 | ||
2166 | /* | |
2167 | * We have the flush lock so we know that this is not in the | |
2168 | * process of being flushed. So, if this is dirty, flush it | |
2169 | * DELWRI so that we don't get a freelist infested with | |
2170 | * dirty dquots. | |
2171 | */ | |
2172 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
2173 | xfs_dqtrace_entry(dqp, "DQSHAKE: DQDIRTY"); | |
2174 | /* | |
2175 | * We flush it delayed write, so don't bother | |
2176 | * releasing the mplock. | |
2177 | */ | |
2178 | (void) xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); | |
2179 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ | |
2180 | dqp = dqp->dq_flnext; | |
2181 | continue; | |
2182 | } | |
2183 | /* | |
2184 | * We're trying to get the hashlock out of order. This races | |
2185 | * with dqlookup; so, we giveup and goto the next dquot if | |
2186 | * we couldn't get the hashlock. This way, we won't starve | |
2187 | * a dqlookup process that holds the hashlock that is | |
2188 | * waiting for the freelist lock. | |
2189 | */ | |
2190 | if (! xfs_qm_dqhashlock_nowait(dqp)) { | |
2191 | xfs_dqfunlock(dqp); | |
2192 | xfs_dqunlock(dqp); | |
2193 | dqp = dqp->dq_flnext; | |
2194 | continue; | |
2195 | } | |
2196 | /* | |
2197 | * This races with dquot allocation code as well as dqflush_all | |
2198 | * and reclaim code. So, if we failed to grab the mplist lock, | |
2199 | * giveup everything and start over. | |
2200 | */ | |
2201 | hash = dqp->q_hash; | |
2202 | ASSERT(hash); | |
2203 | if (! xfs_qm_mplist_nowait(dqp->q_mount)) { | |
2204 | /* XXX put a sentinel so that we can come back here */ | |
2205 | xfs_dqfunlock(dqp); | |
2206 | xfs_dqunlock(dqp); | |
2207 | XFS_DQ_HASH_UNLOCK(hash); | |
2208 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2209 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
2210 | return (nreclaimed); | |
2211 | goto tryagain; | |
2212 | } | |
2213 | xfs_dqtrace_entry(dqp, "DQSHAKE: UNLINKING"); | |
2214 | #ifdef QUOTADEBUG | |
2215 | cmn_err(CE_DEBUG, "Shake 0x%p, ID 0x%x\n", | |
2216 | dqp, INT_GET(dqp->q_core.d_id, ARCH_CONVERT)); | |
2217 | #endif | |
2218 | ASSERT(dqp->q_nrefs == 0); | |
2219 | nextdqp = dqp->dq_flnext; | |
2220 | XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp); | |
2221 | XQM_HASHLIST_REMOVE(hash, dqp); | |
2222 | xfs_dqfunlock(dqp); | |
2223 | xfs_qm_mplist_unlock(dqp->q_mount); | |
2224 | XFS_DQ_HASH_UNLOCK(hash); | |
2225 | ||
2226 | off_freelist: | |
2227 | XQM_FREELIST_REMOVE(dqp); | |
2228 | xfs_dqunlock(dqp); | |
2229 | nreclaimed++; | |
2230 | XQM_STATS_INC(xqmstats.xs_qm_dqshake_reclaims); | |
2231 | xfs_qm_dqdestroy(dqp); | |
2232 | dqp = nextdqp; | |
2233 | } | |
2234 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2235 | return (nreclaimed); | |
2236 | } | |
2237 | ||
2238 | ||
2239 | /* | |
2240 | * The kmem_shake interface is invoked when memory is running low. | |
2241 | */ | |
2242 | /* ARGSUSED */ | |
2243 | STATIC int | |
2244 | xfs_qm_shake(int nr_to_scan, unsigned int gfp_mask) | |
2245 | { | |
2246 | int ndqused, nfree, n; | |
2247 | ||
2248 | if (!kmem_shake_allow(gfp_mask)) | |
2249 | return (0); | |
2250 | if (!xfs_Gqm) | |
2251 | return (0); | |
2252 | ||
2253 | nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */ | |
2254 | /* incore dquots in all f/s's */ | |
2255 | ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree; | |
2256 | ||
2257 | ASSERT(ndqused >= 0); | |
2258 | ||
2259 | if (nfree <= ndqused && nfree < ndquot) | |
2260 | return (0); | |
2261 | ||
2262 | ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */ | |
2263 | n = nfree - ndqused - ndquot; /* # over target */ | |
2264 | ||
2265 | return xfs_qm_shake_freelist(MAX(nfree, n)); | |
2266 | } | |
2267 | ||
2268 | ||
2269 | /* | |
2270 | * Just pop the least recently used dquot off the freelist and | |
2271 | * recycle it. The returned dquot is locked. | |
2272 | */ | |
2273 | STATIC xfs_dquot_t * | |
2274 | xfs_qm_dqreclaim_one(void) | |
2275 | { | |
2276 | xfs_dquot_t *dqpout; | |
2277 | xfs_dquot_t *dqp; | |
2278 | int restarts; | |
2279 | int nflushes; | |
2280 | ||
2281 | restarts = 0; | |
2282 | dqpout = NULL; | |
2283 | nflushes = 0; | |
2284 | ||
2285 | /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */ | |
2286 | startagain: | |
2287 | xfs_qm_freelist_lock(xfs_Gqm); | |
2288 | ||
2289 | FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) { | |
2290 | xfs_dqlock(dqp); | |
2291 | ||
2292 | /* | |
2293 | * We are racing with dqlookup here. Naturally we don't | |
2294 | * want to reclaim a dquot that lookup wants. We release the | |
2295 | * freelist lock and start over, so that lookup will grab | |
2296 | * both the dquot and the freelistlock. | |
2297 | */ | |
2298 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
2299 | ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE)); | |
2300 | xfs_dqtrace_entry(dqp, "DQRECLAIM: DQWANT"); | |
2301 | xfs_dqunlock(dqp); | |
2302 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2303 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
2304 | return (NULL); | |
2305 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); | |
2306 | goto startagain; | |
2307 | } | |
2308 | ||
2309 | /* | |
2310 | * If the dquot is inactive, we are assured that it is | |
2311 | * not on the mplist or the hashlist, and that makes our | |
2312 | * life easier. | |
2313 | */ | |
2314 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
2315 | ASSERT(dqp->q_mount == NULL); | |
2316 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
2317 | ASSERT(dqp->HL_PREVP == NULL); | |
2318 | ASSERT(dqp->MPL_PREVP == NULL); | |
2319 | XQM_FREELIST_REMOVE(dqp); | |
2320 | xfs_dqunlock(dqp); | |
2321 | dqpout = dqp; | |
2322 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); | |
2323 | break; | |
2324 | } | |
2325 | ||
2326 | ASSERT(dqp->q_hash); | |
2327 | ASSERT(dqp->MPL_PREVP); | |
2328 | ||
2329 | /* | |
2330 | * Try to grab the flush lock. If this dquot is in the process of | |
2331 | * getting flushed to disk, we don't want to reclaim it. | |
2332 | */ | |
2333 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
2334 | xfs_dqunlock(dqp); | |
2335 | continue; | |
2336 | } | |
2337 | ||
2338 | /* | |
2339 | * We have the flush lock so we know that this is not in the | |
2340 | * process of being flushed. So, if this is dirty, flush it | |
2341 | * DELWRI so that we don't get a freelist infested with | |
2342 | * dirty dquots. | |
2343 | */ | |
2344 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
2345 | xfs_dqtrace_entry(dqp, "DQRECLAIM: DQDIRTY"); | |
2346 | /* | |
2347 | * We flush it delayed write, so don't bother | |
2348 | * releasing the freelist lock. | |
2349 | */ | |
2350 | (void) xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); | |
2351 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ | |
2352 | continue; | |
2353 | } | |
2354 | ||
2355 | if (! xfs_qm_mplist_nowait(dqp->q_mount)) { | |
2356 | xfs_dqfunlock(dqp); | |
2357 | xfs_dqunlock(dqp); | |
2358 | continue; | |
2359 | } | |
2360 | ||
2361 | if (! xfs_qm_dqhashlock_nowait(dqp)) | |
2362 | goto mplistunlock; | |
2363 | ||
2364 | ASSERT(dqp->q_nrefs == 0); | |
2365 | xfs_dqtrace_entry(dqp, "DQRECLAIM: UNLINKING"); | |
2366 | XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp); | |
2367 | XQM_HASHLIST_REMOVE(dqp->q_hash, dqp); | |
2368 | XQM_FREELIST_REMOVE(dqp); | |
2369 | dqpout = dqp; | |
2370 | XFS_DQ_HASH_UNLOCK(dqp->q_hash); | |
2371 | mplistunlock: | |
2372 | xfs_qm_mplist_unlock(dqp->q_mount); | |
2373 | xfs_dqfunlock(dqp); | |
2374 | xfs_dqunlock(dqp); | |
2375 | if (dqpout) | |
2376 | break; | |
2377 | } | |
2378 | ||
2379 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2380 | return (dqpout); | |
2381 | } | |
2382 | ||
2383 | ||
2384 | /*------------------------------------------------------------------*/ | |
2385 | ||
2386 | /* | |
2387 | * Return a new incore dquot. Depending on the number of | |
2388 | * dquots in the system, we either allocate a new one on the kernel heap, | |
2389 | * or reclaim a free one. | |
2390 | * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed | |
2391 | * to reclaim an existing one from the freelist. | |
2392 | */ | |
2393 | boolean_t | |
2394 | xfs_qm_dqalloc_incore( | |
2395 | xfs_dquot_t **O_dqpp) | |
2396 | { | |
2397 | xfs_dquot_t *dqp; | |
2398 | ||
2399 | /* | |
2400 | * Check against high water mark to see if we want to pop | |
2401 | * a nincompoop dquot off the freelist. | |
2402 | */ | |
2403 | if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) { | |
2404 | /* | |
2405 | * Try to recycle a dquot from the freelist. | |
2406 | */ | |
2407 | if ((dqp = xfs_qm_dqreclaim_one())) { | |
2408 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaims); | |
2409 | /* | |
2410 | * Just zero the core here. The rest will get | |
2411 | * reinitialized by caller. XXX we shouldn't even | |
2412 | * do this zero ... | |
2413 | */ | |
2414 | memset(&dqp->q_core, 0, sizeof(dqp->q_core)); | |
2415 | *O_dqpp = dqp; | |
2416 | return (B_FALSE); | |
2417 | } | |
2418 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses); | |
2419 | } | |
2420 | ||
2421 | /* | |
2422 | * Allocate a brand new dquot on the kernel heap and return it | |
2423 | * to the caller to initialize. | |
2424 | */ | |
2425 | ASSERT(xfs_Gqm->qm_dqzone != NULL); | |
2426 | *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP); | |
2427 | atomic_inc(&xfs_Gqm->qm_totaldquots); | |
2428 | ||
2429 | return (B_TRUE); | |
2430 | } | |
2431 | ||
2432 | ||
2433 | /* | |
2434 | * Start a transaction and write the incore superblock changes to | |
2435 | * disk. flags parameter indicates which fields have changed. | |
2436 | */ | |
2437 | int | |
2438 | xfs_qm_write_sb_changes( | |
2439 | xfs_mount_t *mp, | |
2440 | __int64_t flags) | |
2441 | { | |
2442 | xfs_trans_t *tp; | |
2443 | int error; | |
2444 | ||
2445 | #ifdef QUOTADEBUG | |
2446 | cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname); | |
2447 | #endif | |
2448 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE); | |
2449 | if ((error = xfs_trans_reserve(tp, 0, | |
2450 | mp->m_sb.sb_sectsize + 128, 0, | |
2451 | 0, | |
2452 | XFS_DEFAULT_LOG_COUNT))) { | |
2453 | xfs_trans_cancel(tp, 0); | |
2454 | return (error); | |
2455 | } | |
2456 | ||
2457 | xfs_mod_sb(tp, flags); | |
2458 | (void) xfs_trans_commit(tp, 0, NULL); | |
2459 | ||
2460 | return (0); | |
2461 | } | |
2462 | ||
2463 | ||
2464 | /* --------------- utility functions for vnodeops ---------------- */ | |
2465 | ||
2466 | ||
2467 | /* | |
2468 | * Given an inode, a uid and gid (from cred_t) make sure that we have | |
2469 | * allocated relevant dquot(s) on disk, and that we won't exceed inode | |
2470 | * quotas by creating this file. | |
2471 | * This also attaches dquot(s) to the given inode after locking it, | |
2472 | * and returns the dquots corresponding to the uid and/or gid. | |
2473 | * | |
2474 | * in : inode (unlocked) | |
2475 | * out : udquot, gdquot with references taken and unlocked | |
2476 | */ | |
2477 | int | |
2478 | xfs_qm_vop_dqalloc( | |
2479 | xfs_mount_t *mp, | |
2480 | xfs_inode_t *ip, | |
2481 | uid_t uid, | |
2482 | gid_t gid, | |
c8ad20ff | 2483 | prid_t prid, |
1da177e4 LT |
2484 | uint flags, |
2485 | xfs_dquot_t **O_udqpp, | |
2486 | xfs_dquot_t **O_gdqpp) | |
2487 | { | |
2488 | int error; | |
2489 | xfs_dquot_t *uq, *gq; | |
2490 | uint lockflags; | |
2491 | ||
2492 | if (!XFS_IS_QUOTA_ON(mp)) | |
2493 | return 0; | |
2494 | ||
2495 | lockflags = XFS_ILOCK_EXCL; | |
2496 | xfs_ilock(ip, lockflags); | |
2497 | ||
2498 | if ((flags & XFS_QMOPT_INHERIT) && | |
2499 | XFS_INHERIT_GID(ip, XFS_MTOVFS(mp))) | |
2500 | gid = ip->i_d.di_gid; | |
2501 | ||
2502 | /* | |
2503 | * Attach the dquot(s) to this inode, doing a dquot allocation | |
2504 | * if necessary. The dquot(s) will not be locked. | |
2505 | */ | |
2506 | if (XFS_NOT_DQATTACHED(mp, ip)) { | |
2507 | if ((error = xfs_qm_dqattach(ip, XFS_QMOPT_DQALLOC | | |
2508 | XFS_QMOPT_ILOCKED))) { | |
2509 | xfs_iunlock(ip, lockflags); | |
2510 | return (error); | |
2511 | } | |
2512 | } | |
2513 | ||
2514 | uq = gq = NULL; | |
c8ad20ff | 2515 | if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) { |
1da177e4 LT |
2516 | if (ip->i_d.di_uid != uid) { |
2517 | /* | |
2518 | * What we need is the dquot that has this uid, and | |
2519 | * if we send the inode to dqget, the uid of the inode | |
2520 | * takes priority over what's sent in the uid argument. | |
2521 | * We must unlock inode here before calling dqget if | |
2522 | * we're not sending the inode, because otherwise | |
2523 | * we'll deadlock by doing trans_reserve while | |
2524 | * holding ilock. | |
2525 | */ | |
2526 | xfs_iunlock(ip, lockflags); | |
2527 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid, | |
2528 | XFS_DQ_USER, | |
2529 | XFS_QMOPT_DQALLOC | | |
2530 | XFS_QMOPT_DOWARN, | |
2531 | &uq))) { | |
2532 | ASSERT(error != ENOENT); | |
2533 | return (error); | |
2534 | } | |
2535 | /* | |
2536 | * Get the ilock in the right order. | |
2537 | */ | |
2538 | xfs_dqunlock(uq); | |
2539 | lockflags = XFS_ILOCK_SHARED; | |
2540 | xfs_ilock(ip, lockflags); | |
2541 | } else { | |
2542 | /* | |
2543 | * Take an extra reference, because we'll return | |
2544 | * this to caller | |
2545 | */ | |
2546 | ASSERT(ip->i_udquot); | |
2547 | uq = ip->i_udquot; | |
2548 | xfs_dqlock(uq); | |
2549 | XFS_DQHOLD(uq); | |
2550 | xfs_dqunlock(uq); | |
2551 | } | |
2552 | } | |
c8ad20ff | 2553 | if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) { |
1da177e4 LT |
2554 | if (ip->i_d.di_gid != gid) { |
2555 | xfs_iunlock(ip, lockflags); | |
2556 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid, | |
2557 | XFS_DQ_GROUP, | |
2558 | XFS_QMOPT_DQALLOC | | |
2559 | XFS_QMOPT_DOWARN, | |
2560 | &gq))) { | |
2561 | if (uq) | |
2562 | xfs_qm_dqrele(uq); | |
2563 | ASSERT(error != ENOENT); | |
2564 | return (error); | |
2565 | } | |
2566 | xfs_dqunlock(gq); | |
2567 | lockflags = XFS_ILOCK_SHARED; | |
2568 | xfs_ilock(ip, lockflags); | |
2569 | } else { | |
2570 | ASSERT(ip->i_gdquot); | |
2571 | gq = ip->i_gdquot; | |
2572 | xfs_dqlock(gq); | |
2573 | XFS_DQHOLD(gq); | |
2574 | xfs_dqunlock(gq); | |
2575 | } | |
c8ad20ff NS |
2576 | } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) { |
2577 | if (ip->i_d.di_projid != prid) { | |
2578 | xfs_iunlock(ip, lockflags); | |
2579 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid, | |
2580 | XFS_DQ_PROJ, | |
2581 | XFS_QMOPT_DQALLOC | | |
2582 | XFS_QMOPT_DOWARN, | |
2583 | &gq))) { | |
2584 | if (uq) | |
2585 | xfs_qm_dqrele(uq); | |
2586 | ASSERT(error != ENOENT); | |
2587 | return (error); | |
2588 | } | |
2589 | xfs_dqunlock(gq); | |
2590 | lockflags = XFS_ILOCK_SHARED; | |
2591 | xfs_ilock(ip, lockflags); | |
2592 | } else { | |
2593 | ASSERT(ip->i_gdquot); | |
2594 | gq = ip->i_gdquot; | |
2595 | xfs_dqlock(gq); | |
2596 | XFS_DQHOLD(gq); | |
2597 | xfs_dqunlock(gq); | |
2598 | } | |
1da177e4 LT |
2599 | } |
2600 | if (uq) | |
2601 | xfs_dqtrace_entry_ino(uq, "DQALLOC", ip); | |
2602 | ||
2603 | xfs_iunlock(ip, lockflags); | |
2604 | if (O_udqpp) | |
2605 | *O_udqpp = uq; | |
2606 | else if (uq) | |
2607 | xfs_qm_dqrele(uq); | |
2608 | if (O_gdqpp) | |
2609 | *O_gdqpp = gq; | |
2610 | else if (gq) | |
2611 | xfs_qm_dqrele(gq); | |
2612 | return (0); | |
2613 | } | |
2614 | ||
2615 | /* | |
2616 | * Actually transfer ownership, and do dquot modifications. | |
2617 | * These were already reserved. | |
2618 | */ | |
2619 | xfs_dquot_t * | |
2620 | xfs_qm_vop_chown( | |
2621 | xfs_trans_t *tp, | |
2622 | xfs_inode_t *ip, | |
2623 | xfs_dquot_t **IO_olddq, | |
2624 | xfs_dquot_t *newdq) | |
2625 | { | |
2626 | xfs_dquot_t *prevdq; | |
2627 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
2628 | ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount)); | |
2629 | ||
2630 | /* old dquot */ | |
2631 | prevdq = *IO_olddq; | |
2632 | ASSERT(prevdq); | |
2633 | ASSERT(prevdq != newdq); | |
2634 | ||
2635 | xfs_trans_mod_dquot(tp, prevdq, | |
2636 | XFS_TRANS_DQ_BCOUNT, | |
2637 | -(ip->i_d.di_nblocks)); | |
2638 | xfs_trans_mod_dquot(tp, prevdq, | |
2639 | XFS_TRANS_DQ_ICOUNT, | |
2640 | -1); | |
2641 | ||
2642 | /* the sparkling new dquot */ | |
2643 | xfs_trans_mod_dquot(tp, newdq, | |
2644 | XFS_TRANS_DQ_BCOUNT, | |
2645 | ip->i_d.di_nblocks); | |
2646 | xfs_trans_mod_dquot(tp, newdq, | |
2647 | XFS_TRANS_DQ_ICOUNT, | |
2648 | 1); | |
2649 | ||
2650 | /* | |
2651 | * Take an extra reference, because the inode | |
2652 | * is going to keep this dquot pointer even | |
2653 | * after the trans_commit. | |
2654 | */ | |
2655 | xfs_dqlock(newdq); | |
2656 | XFS_DQHOLD(newdq); | |
2657 | xfs_dqunlock(newdq); | |
2658 | *IO_olddq = newdq; | |
2659 | ||
2660 | return (prevdq); | |
2661 | } | |
2662 | ||
2663 | /* | |
c8ad20ff | 2664 | * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID). |
1da177e4 LT |
2665 | */ |
2666 | int | |
2667 | xfs_qm_vop_chown_reserve( | |
2668 | xfs_trans_t *tp, | |
2669 | xfs_inode_t *ip, | |
2670 | xfs_dquot_t *udqp, | |
2671 | xfs_dquot_t *gdqp, | |
2672 | uint flags) | |
2673 | { | |
2674 | int error; | |
2675 | xfs_mount_t *mp; | |
2676 | uint delblks; | |
2677 | xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq; | |
2678 | ||
2679 | ASSERT(XFS_ISLOCKED_INODE(ip)); | |
2680 | mp = ip->i_mount; | |
2681 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
2682 | ||
2683 | delblks = ip->i_delayed_blks; | |
2684 | delblksudq = delblksgdq = unresudq = unresgdq = NULL; | |
2685 | ||
2686 | if (XFS_IS_UQUOTA_ON(mp) && udqp && | |
2687 | ip->i_d.di_uid != (uid_t)INT_GET(udqp->q_core.d_id, ARCH_CONVERT)) { | |
2688 | delblksudq = udqp; | |
2689 | /* | |
2690 | * If there are delayed allocation blocks, then we have to | |
2691 | * unreserve those from the old dquot, and add them to the | |
2692 | * new dquot. | |
2693 | */ | |
2694 | if (delblks) { | |
2695 | ASSERT(ip->i_udquot); | |
2696 | unresudq = ip->i_udquot; | |
2697 | } | |
2698 | } | |
c8ad20ff NS |
2699 | if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) { |
2700 | if ((XFS_IS_GQUOTA_ON(ip->i_mount) && ip->i_d.di_gid != | |
2701 | INT_GET(gdqp->q_core.d_id, ARCH_CONVERT)) || | |
2702 | (XFS_IS_PQUOTA_ON(ip->i_mount) && ip->i_d.di_projid != | |
2703 | INT_GET(gdqp->q_core.d_id, ARCH_CONVERT))) { | |
2704 | delblksgdq = gdqp; | |
2705 | if (delblks) { | |
2706 | ASSERT(ip->i_gdquot); | |
2707 | unresgdq = ip->i_gdquot; | |
2708 | } | |
1da177e4 LT |
2709 | } |
2710 | } | |
2711 | ||
2712 | if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount, | |
2713 | delblksudq, delblksgdq, ip->i_d.di_nblocks, 1, | |
2714 | flags | XFS_QMOPT_RES_REGBLKS))) | |
2715 | return (error); | |
2716 | ||
2717 | /* | |
2718 | * Do the delayed blks reservations/unreservations now. Since, these | |
2719 | * are done without the help of a transaction, if a reservation fails | |
2720 | * its previous reservations won't be automatically undone by trans | |
2721 | * code. So, we have to do it manually here. | |
2722 | */ | |
2723 | if (delblks) { | |
2724 | /* | |
2725 | * Do the reservations first. Unreservation can't fail. | |
2726 | */ | |
2727 | ASSERT(delblksudq || delblksgdq); | |
2728 | ASSERT(unresudq || unresgdq); | |
2729 | if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2730 | delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0, | |
2731 | flags | XFS_QMOPT_RES_REGBLKS))) | |
2732 | return (error); | |
2733 | xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2734 | unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0, | |
2735 | XFS_QMOPT_RES_REGBLKS); | |
2736 | } | |
2737 | ||
2738 | return (0); | |
2739 | } | |
2740 | ||
2741 | int | |
2742 | xfs_qm_vop_rename_dqattach( | |
2743 | xfs_inode_t **i_tab) | |
2744 | { | |
2745 | xfs_inode_t *ip; | |
2746 | int i; | |
2747 | int error; | |
2748 | ||
2749 | ip = i_tab[0]; | |
2750 | ||
2751 | if (! XFS_IS_QUOTA_ON(ip->i_mount)) | |
2752 | return (0); | |
2753 | ||
2754 | if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) { | |
2755 | error = xfs_qm_dqattach(ip, 0); | |
2756 | if (error) | |
2757 | return (error); | |
2758 | } | |
2759 | for (i = 1; (i < 4 && i_tab[i]); i++) { | |
2760 | /* | |
2761 | * Watch out for duplicate entries in the table. | |
2762 | */ | |
2763 | if ((ip = i_tab[i]) != i_tab[i-1]) { | |
2764 | if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) { | |
2765 | error = xfs_qm_dqattach(ip, 0); | |
2766 | if (error) | |
2767 | return (error); | |
2768 | } | |
2769 | } | |
2770 | } | |
2771 | return (0); | |
2772 | } | |
2773 | ||
2774 | void | |
2775 | xfs_qm_vop_dqattach_and_dqmod_newinode( | |
2776 | xfs_trans_t *tp, | |
2777 | xfs_inode_t *ip, | |
2778 | xfs_dquot_t *udqp, | |
2779 | xfs_dquot_t *gdqp) | |
2780 | { | |
2781 | if (!XFS_IS_QUOTA_ON(tp->t_mountp)) | |
2782 | return; | |
2783 | ||
2784 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
2785 | ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp)); | |
2786 | ||
2787 | if (udqp) { | |
2788 | xfs_dqlock(udqp); | |
2789 | XFS_DQHOLD(udqp); | |
2790 | xfs_dqunlock(udqp); | |
2791 | ASSERT(ip->i_udquot == NULL); | |
2792 | ip->i_udquot = udqp; | |
2793 | ASSERT(ip->i_d.di_uid == INT_GET(udqp->q_core.d_id, ARCH_CONVERT)); | |
2794 | xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1); | |
2795 | } | |
2796 | if (gdqp) { | |
2797 | xfs_dqlock(gdqp); | |
2798 | XFS_DQHOLD(gdqp); | |
2799 | xfs_dqunlock(gdqp); | |
2800 | ASSERT(ip->i_gdquot == NULL); | |
2801 | ip->i_gdquot = gdqp; | |
2802 | ASSERT(ip->i_d.di_gid == INT_GET(gdqp->q_core.d_id, ARCH_CONVERT)); | |
2803 | xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1); | |
2804 | } | |
2805 | } | |
2806 | ||
2807 | /* ------------- list stuff -----------------*/ | |
ba0f32d4 | 2808 | STATIC void |
1da177e4 LT |
2809 | xfs_qm_freelist_init(xfs_frlist_t *ql) |
2810 | { | |
2811 | ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql; | |
2812 | mutex_init(&ql->qh_lock, MUTEX_DEFAULT, "dqf"); | |
2813 | ql->qh_version = 0; | |
2814 | ql->qh_nelems = 0; | |
2815 | } | |
2816 | ||
ba0f32d4 | 2817 | STATIC void |
1da177e4 LT |
2818 | xfs_qm_freelist_destroy(xfs_frlist_t *ql) |
2819 | { | |
2820 | xfs_dquot_t *dqp, *nextdqp; | |
2821 | ||
2822 | mutex_lock(&ql->qh_lock, PINOD); | |
2823 | for (dqp = ql->qh_next; | |
2824 | dqp != (xfs_dquot_t *)ql; ) { | |
2825 | xfs_dqlock(dqp); | |
2826 | nextdqp = dqp->dq_flnext; | |
2827 | #ifdef QUOTADEBUG | |
2828 | cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp); | |
2829 | #endif | |
2830 | XQM_FREELIST_REMOVE(dqp); | |
2831 | xfs_dqunlock(dqp); | |
2832 | xfs_qm_dqdestroy(dqp); | |
2833 | dqp = nextdqp; | |
2834 | } | |
2835 | /* | |
2836 | * Don't bother about unlocking. | |
2837 | */ | |
2838 | mutex_destroy(&ql->qh_lock); | |
2839 | ||
2840 | ASSERT(ql->qh_nelems == 0); | |
2841 | } | |
2842 | ||
ba0f32d4 | 2843 | STATIC void |
1da177e4 LT |
2844 | xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq) |
2845 | { | |
2846 | dq->dq_flnext = ql->qh_next; | |
2847 | dq->dq_flprev = (xfs_dquot_t *)ql; | |
2848 | ql->qh_next = dq; | |
2849 | dq->dq_flnext->dq_flprev = dq; | |
2850 | xfs_Gqm->qm_dqfreelist.qh_nelems++; | |
2851 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2852 | } | |
2853 | ||
2854 | void | |
2855 | xfs_qm_freelist_unlink(xfs_dquot_t *dq) | |
2856 | { | |
2857 | xfs_dquot_t *next = dq->dq_flnext; | |
2858 | xfs_dquot_t *prev = dq->dq_flprev; | |
2859 | ||
2860 | next->dq_flprev = prev; | |
2861 | prev->dq_flnext = next; | |
2862 | dq->dq_flnext = dq->dq_flprev = dq; | |
2863 | xfs_Gqm->qm_dqfreelist.qh_nelems--; | |
2864 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2865 | } | |
2866 | ||
2867 | void | |
2868 | xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq) | |
2869 | { | |
2870 | xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq); | |
2871 | } | |
2872 | ||
ba0f32d4 | 2873 | STATIC int |
1da177e4 LT |
2874 | xfs_qm_dqhashlock_nowait( |
2875 | xfs_dquot_t *dqp) | |
2876 | { | |
2877 | int locked; | |
2878 | ||
2879 | locked = mutex_trylock(&((dqp)->q_hash->qh_lock)); | |
2880 | return (locked); | |
2881 | } | |
2882 | ||
2883 | int | |
2884 | xfs_qm_freelist_lock_nowait( | |
2885 | xfs_qm_t *xqm) | |
2886 | { | |
2887 | int locked; | |
2888 | ||
2889 | locked = mutex_trylock(&(xqm->qm_dqfreelist.qh_lock)); | |
2890 | return (locked); | |
2891 | } | |
2892 | ||
ba0f32d4 | 2893 | STATIC int |
1da177e4 LT |
2894 | xfs_qm_mplist_nowait( |
2895 | xfs_mount_t *mp) | |
2896 | { | |
2897 | int locked; | |
2898 | ||
2899 | ASSERT(mp->m_quotainfo); | |
2900 | locked = mutex_trylock(&(XFS_QI_MPLLOCK(mp))); | |
2901 | return (locked); | |
2902 | } |