Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
4ce3121f NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
4ce3121f NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
4ce3121f NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
4ce3121f NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 LT |
18 | #include "xfs.h" |
19 | #include "xfs_fs.h" | |
a844f451 | 20 | #include "xfs_bit.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_clnt.h" |
24 | #include "xfs_trans.h" | |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
27 | #include "xfs_dir.h" | |
28 | #include "xfs_dir2.h" | |
29 | #include "xfs_alloc.h" | |
30 | #include "xfs_dmapi.h" | |
31 | #include "xfs_quota.h" | |
32 | #include "xfs_mount.h" | |
1da177e4 | 33 | #include "xfs_bmap_btree.h" |
a844f451 | 34 | #include "xfs_alloc_btree.h" |
1da177e4 | 35 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
36 | #include "xfs_dir_sf.h" |
37 | #include "xfs_dir2_sf.h" | |
a844f451 | 38 | #include "xfs_attr_sf.h" |
1da177e4 LT |
39 | #include "xfs_dinode.h" |
40 | #include "xfs_inode.h" | |
a844f451 NS |
41 | #include "xfs_btree.h" |
42 | #include "xfs_ialloc.h" | |
43 | #include "xfs_itable.h" | |
1da177e4 LT |
44 | #include "xfs_rtalloc.h" |
45 | #include "xfs_error.h" | |
a844f451 | 46 | #include "xfs_bmap.h" |
1da177e4 LT |
47 | #include "xfs_rw.h" |
48 | #include "xfs_acl.h" | |
49 | #include "xfs_cap.h" | |
50 | #include "xfs_mac.h" | |
51 | #include "xfs_attr.h" | |
52 | #include "xfs_buf_item.h" | |
53 | #include "xfs_trans_space.h" | |
54 | #include "xfs_utils.h" | |
1da177e4 LT |
55 | #include "xfs_qm.h" |
56 | ||
57 | /* | |
58 | * The global quota manager. There is only one of these for the entire | |
59 | * system, _not_ one per file system. XQM keeps track of the overall | |
60 | * quota functionality, including maintaining the freelist and hash | |
61 | * tables of dquots. | |
62 | */ | |
6b3f6b5b | 63 | mutex_t xfs_Gqm_lock; |
1da177e4 | 64 | struct xfs_qm *xfs_Gqm; |
6b3f6b5b | 65 | uint ndquot; |
1da177e4 LT |
66 | |
67 | kmem_zone_t *qm_dqzone; | |
68 | kmem_zone_t *qm_dqtrxzone; | |
ba0f32d4 | 69 | STATIC kmem_shaker_t xfs_qm_shaker; |
1da177e4 LT |
70 | |
71 | STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int); | |
72 | STATIC void xfs_qm_list_destroy(xfs_dqlist_t *); | |
73 | ||
ba0f32d4 CH |
74 | STATIC void xfs_qm_freelist_init(xfs_frlist_t *); |
75 | STATIC void xfs_qm_freelist_destroy(xfs_frlist_t *); | |
76 | STATIC int xfs_qm_mplist_nowait(xfs_mount_t *); | |
77 | STATIC int xfs_qm_dqhashlock_nowait(xfs_dquot_t *); | |
78 | ||
1da177e4 | 79 | STATIC int xfs_qm_init_quotainos(xfs_mount_t *); |
ba0f32d4 | 80 | STATIC int xfs_qm_init_quotainfo(xfs_mount_t *); |
51bfb75b | 81 | STATIC int xfs_qm_shake(int, gfp_t); |
1da177e4 LT |
82 | |
83 | #ifdef DEBUG | |
84 | extern mutex_t qcheck_lock; | |
85 | #endif | |
86 | ||
87 | #ifdef QUOTADEBUG | |
88 | #define XQM_LIST_PRINT(l, NXT, title) \ | |
89 | { \ | |
90 | xfs_dquot_t *dqp; int i = 0; \ | |
91 | cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \ | |
92 | for (dqp = (l)->qh_next; dqp != NULL; dqp = dqp->NXT) { \ | |
93 | cmn_err(CE_DEBUG, " %d. \"%d (%s)\" " \ | |
94 | "bcnt = %d, icnt = %d, refs = %d", \ | |
1149d96a | 95 | ++i, (int) be32_to_cpu(dqp->q_core.d_id), \ |
1da177e4 | 96 | DQFLAGTO_TYPESTR(dqp), \ |
1149d96a CH |
97 | (int) be64_to_cpu(dqp->q_core.d_bcount), \ |
98 | (int) be64_to_cpu(dqp->q_core.d_icount), \ | |
1da177e4 LT |
99 | (int) dqp->q_nrefs); } \ |
100 | } | |
101 | #else | |
102 | #define XQM_LIST_PRINT(l, NXT, title) do { } while (0) | |
103 | #endif | |
104 | ||
105 | /* | |
106 | * Initialize the XQM structure. | |
107 | * Note that there is not one quota manager per file system. | |
108 | */ | |
109 | STATIC struct xfs_qm * | |
110 | xfs_Gqm_init(void) | |
111 | { | |
6b3f6b5b NS |
112 | xfs_dqhash_t *udqhash, *gdqhash; |
113 | xfs_qm_t *xqm; | |
114 | uint i, hsize, flags = KM_SLEEP | KM_MAYFAIL; | |
1da177e4 LT |
115 | |
116 | /* | |
117 | * Initialize the dquot hash tables. | |
118 | */ | |
6b3f6b5b NS |
119 | hsize = XFS_QM_HASHSIZE_HIGH; |
120 | while (!(udqhash = kmem_zalloc(hsize * sizeof(xfs_dqhash_t), flags))) { | |
121 | if ((hsize >>= 1) <= XFS_QM_HASHSIZE_LOW) | |
122 | flags = KM_SLEEP; | |
123 | } | |
124 | gdqhash = kmem_zalloc(hsize * sizeof(xfs_dqhash_t), KM_SLEEP); | |
125 | ndquot = hsize << 8; | |
1da177e4 | 126 | |
6b3f6b5b NS |
127 | xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP); |
128 | xqm->qm_dqhashmask = hsize - 1; | |
129 | xqm->qm_usr_dqhtable = udqhash; | |
130 | xqm->qm_grp_dqhtable = gdqhash; | |
1da177e4 LT |
131 | ASSERT(xqm->qm_usr_dqhtable != NULL); |
132 | ASSERT(xqm->qm_grp_dqhtable != NULL); | |
133 | ||
134 | for (i = 0; i < hsize; i++) { | |
135 | xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i); | |
136 | xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i); | |
137 | } | |
138 | ||
139 | /* | |
140 | * Freelist of all dquots of all file systems | |
141 | */ | |
142 | xfs_qm_freelist_init(&(xqm->qm_dqfreelist)); | |
143 | ||
144 | /* | |
145 | * dquot zone. we register our own low-memory callback. | |
146 | */ | |
147 | if (!qm_dqzone) { | |
148 | xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t), | |
149 | "xfs_dquots"); | |
150 | qm_dqzone = xqm->qm_dqzone; | |
151 | } else | |
152 | xqm->qm_dqzone = qm_dqzone; | |
153 | ||
154 | xfs_qm_shaker = kmem_shake_register(xfs_qm_shake); | |
155 | ||
156 | /* | |
157 | * The t_dqinfo portion of transactions. | |
158 | */ | |
159 | if (!qm_dqtrxzone) { | |
160 | xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t), | |
161 | "xfs_dqtrx"); | |
162 | qm_dqtrxzone = xqm->qm_dqtrxzone; | |
163 | } else | |
164 | xqm->qm_dqtrxzone = qm_dqtrxzone; | |
165 | ||
166 | atomic_set(&xqm->qm_totaldquots, 0); | |
167 | xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO; | |
168 | xqm->qm_nrefs = 0; | |
169 | #ifdef DEBUG | |
794ee1ba | 170 | xfs_mutex_init(&qcheck_lock, MUTEX_DEFAULT, "qchk"); |
1da177e4 LT |
171 | #endif |
172 | return xqm; | |
173 | } | |
174 | ||
175 | /* | |
176 | * Destroy the global quota manager when its reference count goes to zero. | |
177 | */ | |
ba0f32d4 | 178 | STATIC void |
1da177e4 LT |
179 | xfs_qm_destroy( |
180 | struct xfs_qm *xqm) | |
181 | { | |
182 | int hsize, i; | |
183 | ||
184 | ASSERT(xqm != NULL); | |
185 | ASSERT(xqm->qm_nrefs == 0); | |
186 | kmem_shake_deregister(xfs_qm_shaker); | |
187 | hsize = xqm->qm_dqhashmask + 1; | |
188 | for (i = 0; i < hsize; i++) { | |
189 | xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i])); | |
190 | xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i])); | |
191 | } | |
192 | kmem_free(xqm->qm_usr_dqhtable, hsize * sizeof(xfs_dqhash_t)); | |
193 | kmem_free(xqm->qm_grp_dqhtable, hsize * sizeof(xfs_dqhash_t)); | |
194 | xqm->qm_usr_dqhtable = NULL; | |
195 | xqm->qm_grp_dqhtable = NULL; | |
196 | xqm->qm_dqhashmask = 0; | |
197 | xfs_qm_freelist_destroy(&(xqm->qm_dqfreelist)); | |
198 | #ifdef DEBUG | |
199 | mutex_destroy(&qcheck_lock); | |
200 | #endif | |
201 | kmem_free(xqm, sizeof(xfs_qm_t)); | |
202 | } | |
203 | ||
204 | /* | |
205 | * Called at mount time to let XQM know that another file system is | |
206 | * starting quotas. This isn't crucial information as the individual mount | |
207 | * structures are pretty independent, but it helps the XQM keep a | |
208 | * global view of what's going on. | |
209 | */ | |
210 | /* ARGSUSED */ | |
211 | STATIC int | |
212 | xfs_qm_hold_quotafs_ref( | |
213 | struct xfs_mount *mp) | |
214 | { | |
215 | /* | |
216 | * Need to lock the xfs_Gqm structure for things like this. For example, | |
217 | * the structure could disappear between the entry to this routine and | |
218 | * a HOLD operation if not locked. | |
219 | */ | |
220 | XFS_QM_LOCK(xfs_Gqm); | |
221 | ||
222 | if (xfs_Gqm == NULL) | |
223 | xfs_Gqm = xfs_Gqm_init(); | |
224 | /* | |
225 | * We can keep a list of all filesystems with quotas mounted for | |
226 | * debugging and statistical purposes, but ... | |
227 | * Just take a reference and get out. | |
228 | */ | |
229 | XFS_QM_HOLD(xfs_Gqm); | |
230 | XFS_QM_UNLOCK(xfs_Gqm); | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | ||
236 | /* | |
237 | * Release the reference that a filesystem took at mount time, | |
238 | * so that we know when we need to destroy the entire quota manager. | |
239 | */ | |
240 | /* ARGSUSED */ | |
241 | STATIC void | |
242 | xfs_qm_rele_quotafs_ref( | |
243 | struct xfs_mount *mp) | |
244 | { | |
245 | xfs_dquot_t *dqp, *nextdqp; | |
246 | ||
247 | ASSERT(xfs_Gqm); | |
248 | ASSERT(xfs_Gqm->qm_nrefs > 0); | |
249 | ||
250 | /* | |
251 | * Go thru the freelist and destroy all inactive dquots. | |
252 | */ | |
253 | xfs_qm_freelist_lock(xfs_Gqm); | |
254 | ||
255 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
256 | dqp != (xfs_dquot_t *)&(xfs_Gqm->qm_dqfreelist); ) { | |
257 | xfs_dqlock(dqp); | |
258 | nextdqp = dqp->dq_flnext; | |
259 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
260 | ASSERT(dqp->q_mount == NULL); | |
261 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
262 | ASSERT(dqp->HL_PREVP == NULL); | |
263 | ASSERT(dqp->MPL_PREVP == NULL); | |
264 | XQM_FREELIST_REMOVE(dqp); | |
265 | xfs_dqunlock(dqp); | |
266 | xfs_qm_dqdestroy(dqp); | |
267 | } else { | |
268 | xfs_dqunlock(dqp); | |
269 | } | |
270 | dqp = nextdqp; | |
271 | } | |
272 | xfs_qm_freelist_unlock(xfs_Gqm); | |
273 | ||
274 | /* | |
275 | * Destroy the entire XQM. If somebody mounts with quotaon, this'll | |
276 | * be restarted. | |
277 | */ | |
278 | XFS_QM_LOCK(xfs_Gqm); | |
279 | XFS_QM_RELE(xfs_Gqm); | |
280 | if (xfs_Gqm->qm_nrefs == 0) { | |
281 | xfs_qm_destroy(xfs_Gqm); | |
282 | xfs_Gqm = NULL; | |
283 | } | |
284 | XFS_QM_UNLOCK(xfs_Gqm); | |
285 | } | |
286 | ||
287 | /* | |
288 | * This is called at mount time from xfs_mountfs to initialize the quotainfo | |
289 | * structure and start the global quotamanager (xfs_Gqm) if it hasn't done | |
290 | * so already. Note that the superblock has not been read in yet. | |
291 | */ | |
292 | void | |
293 | xfs_qm_mount_quotainit( | |
294 | xfs_mount_t *mp, | |
295 | uint flags) | |
296 | { | |
297 | /* | |
c8ad20ff | 298 | * User, projects or group quotas has to be on. |
1da177e4 | 299 | */ |
c8ad20ff | 300 | ASSERT(flags & (XFSMNT_UQUOTA | XFSMNT_PQUOTA | XFSMNT_GQUOTA)); |
1da177e4 LT |
301 | |
302 | /* | |
303 | * Initialize the flags in the mount structure. From this point | |
304 | * onwards we look at m_qflags to figure out if quotas's ON/OFF, etc. | |
305 | * Note that we enforce nothing if accounting is off. | |
306 | * ie. XFSMNT_*QUOTA must be ON for XFSMNT_*QUOTAENF. | |
307 | * It isn't necessary to take the quotaoff lock to do this; this is | |
308 | * called from mount. | |
309 | */ | |
310 | if (flags & XFSMNT_UQUOTA) { | |
311 | mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); | |
312 | if (flags & XFSMNT_UQUOTAENF) | |
313 | mp->m_qflags |= XFS_UQUOTA_ENFD; | |
314 | } | |
315 | if (flags & XFSMNT_GQUOTA) { | |
316 | mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); | |
317 | if (flags & XFSMNT_GQUOTAENF) | |
c8ad20ff NS |
318 | mp->m_qflags |= XFS_OQUOTA_ENFD; |
319 | } else if (flags & XFSMNT_PQUOTA) { | |
320 | mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); | |
321 | if (flags & XFSMNT_PQUOTAENF) | |
322 | mp->m_qflags |= XFS_OQUOTA_ENFD; | |
1da177e4 LT |
323 | } |
324 | } | |
325 | ||
326 | /* | |
327 | * Just destroy the quotainfo structure. | |
328 | */ | |
329 | void | |
330 | xfs_qm_unmount_quotadestroy( | |
331 | xfs_mount_t *mp) | |
332 | { | |
333 | if (mp->m_quotainfo) | |
334 | xfs_qm_destroy_quotainfo(mp); | |
335 | } | |
336 | ||
337 | ||
338 | /* | |
339 | * This is called from xfs_mountfs to start quotas and initialize all | |
340 | * necessary data structures like quotainfo. This is also responsible for | |
341 | * running a quotacheck as necessary. We are guaranteed that the superblock | |
342 | * is consistently read in at this point. | |
343 | */ | |
344 | int | |
345 | xfs_qm_mount_quotas( | |
346 | xfs_mount_t *mp, | |
347 | int mfsi_flags) | |
348 | { | |
349 | unsigned long s; | |
350 | int error = 0; | |
351 | uint sbf; | |
352 | ||
1da177e4 LT |
353 | |
354 | /* | |
355 | * If quotas on realtime volumes is not supported, we disable | |
356 | * quotas immediately. | |
357 | */ | |
358 | if (mp->m_sb.sb_rextents) { | |
359 | cmn_err(CE_NOTE, | |
360 | "Cannot turn on quotas for realtime filesystem %s", | |
361 | mp->m_fsname); | |
362 | mp->m_qflags = 0; | |
363 | goto write_changes; | |
364 | } | |
365 | ||
1da177e4 | 366 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
155ffd07 | 367 | |
1da177e4 LT |
368 | /* |
369 | * Allocate the quotainfo structure inside the mount struct, and | |
370 | * create quotainode(s), and change/rev superblock if necessary. | |
371 | */ | |
372 | if ((error = xfs_qm_init_quotainfo(mp))) { | |
373 | /* | |
374 | * We must turn off quotas. | |
375 | */ | |
376 | ASSERT(mp->m_quotainfo == NULL); | |
377 | mp->m_qflags = 0; | |
378 | goto write_changes; | |
379 | } | |
380 | /* | |
381 | * If any of the quotas are not consistent, do a quotacheck. | |
382 | */ | |
383 | if (XFS_QM_NEED_QUOTACHECK(mp) && | |
384 | !(mfsi_flags & XFS_MFSI_NO_QUOTACHECK)) { | |
1da177e4 LT |
385 | if ((error = xfs_qm_quotacheck(mp))) { |
386 | /* Quotacheck has failed and quotas have | |
387 | * been disabled. | |
388 | */ | |
389 | return XFS_ERROR(error); | |
390 | } | |
1da177e4 | 391 | } |
155ffd07 | 392 | |
1da177e4 LT |
393 | write_changes: |
394 | /* | |
395 | * We actually don't have to acquire the SB_LOCK at all. | |
396 | * This can only be called from mount, and that's single threaded. XXX | |
397 | */ | |
398 | s = XFS_SB_LOCK(mp); | |
399 | sbf = mp->m_sb.sb_qflags; | |
400 | mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL; | |
401 | XFS_SB_UNLOCK(mp, s); | |
402 | ||
403 | if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) { | |
404 | if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) { | |
405 | /* | |
406 | * We could only have been turning quotas off. | |
407 | * We aren't in very good shape actually because | |
408 | * the incore structures are convinced that quotas are | |
409 | * off, but the on disk superblock doesn't know that ! | |
410 | */ | |
411 | ASSERT(!(XFS_IS_QUOTA_RUNNING(mp))); | |
412 | xfs_fs_cmn_err(CE_ALERT, mp, | |
413 | "XFS mount_quotas: Superblock update failed!"); | |
414 | } | |
415 | } | |
416 | ||
417 | if (error) { | |
418 | xfs_fs_cmn_err(CE_WARN, mp, | |
419 | "Failed to initialize disk quotas."); | |
420 | } | |
421 | return XFS_ERROR(error); | |
422 | } | |
423 | ||
424 | /* | |
425 | * Called from the vfsops layer. | |
426 | */ | |
427 | int | |
428 | xfs_qm_unmount_quotas( | |
429 | xfs_mount_t *mp) | |
430 | { | |
431 | xfs_inode_t *uqp, *gqp; | |
432 | int error = 0; | |
433 | ||
434 | /* | |
435 | * Release the dquots that root inode, et al might be holding, | |
436 | * before we flush quotas and blow away the quotainfo structure. | |
437 | */ | |
438 | ASSERT(mp->m_rootip); | |
439 | xfs_qm_dqdetach(mp->m_rootip); | |
440 | if (mp->m_rbmip) | |
441 | xfs_qm_dqdetach(mp->m_rbmip); | |
442 | if (mp->m_rsumip) | |
443 | xfs_qm_dqdetach(mp->m_rsumip); | |
444 | ||
445 | /* | |
446 | * Flush out the quota inodes. | |
447 | */ | |
448 | uqp = gqp = NULL; | |
449 | if (mp->m_quotainfo) { | |
450 | if ((uqp = mp->m_quotainfo->qi_uquotaip) != NULL) { | |
451 | xfs_ilock(uqp, XFS_ILOCK_EXCL); | |
452 | xfs_iflock(uqp); | |
453 | error = xfs_iflush(uqp, XFS_IFLUSH_SYNC); | |
454 | xfs_iunlock(uqp, XFS_ILOCK_EXCL); | |
455 | if (unlikely(error == EFSCORRUPTED)) { | |
456 | XFS_ERROR_REPORT("xfs_qm_unmount_quotas(1)", | |
457 | XFS_ERRLEVEL_LOW, mp); | |
458 | goto out; | |
459 | } | |
460 | } | |
461 | if ((gqp = mp->m_quotainfo->qi_gquotaip) != NULL) { | |
462 | xfs_ilock(gqp, XFS_ILOCK_EXCL); | |
463 | xfs_iflock(gqp); | |
464 | error = xfs_iflush(gqp, XFS_IFLUSH_SYNC); | |
465 | xfs_iunlock(gqp, XFS_ILOCK_EXCL); | |
466 | if (unlikely(error == EFSCORRUPTED)) { | |
467 | XFS_ERROR_REPORT("xfs_qm_unmount_quotas(2)", | |
468 | XFS_ERRLEVEL_LOW, mp); | |
469 | goto out; | |
470 | } | |
471 | } | |
472 | } | |
473 | if (uqp) { | |
474 | XFS_PURGE_INODE(uqp); | |
475 | mp->m_quotainfo->qi_uquotaip = NULL; | |
476 | } | |
477 | if (gqp) { | |
478 | XFS_PURGE_INODE(gqp); | |
479 | mp->m_quotainfo->qi_gquotaip = NULL; | |
480 | } | |
481 | out: | |
482 | return XFS_ERROR(error); | |
483 | } | |
484 | ||
485 | /* | |
486 | * Flush all dquots of the given file system to disk. The dquots are | |
487 | * _not_ purged from memory here, just their data written to disk. | |
488 | */ | |
ba0f32d4 | 489 | STATIC int |
1da177e4 LT |
490 | xfs_qm_dqflush_all( |
491 | xfs_mount_t *mp, | |
492 | int flags) | |
493 | { | |
494 | int recl; | |
495 | xfs_dquot_t *dqp; | |
496 | int niters; | |
497 | int error; | |
498 | ||
499 | if (mp->m_quotainfo == NULL) | |
014c2544 | 500 | return 0; |
1da177e4 LT |
501 | niters = 0; |
502 | again: | |
503 | xfs_qm_mplist_lock(mp); | |
504 | FOREACH_DQUOT_IN_MP(dqp, mp) { | |
505 | xfs_dqlock(dqp); | |
506 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
507 | xfs_dqunlock(dqp); | |
508 | continue; | |
509 | } | |
510 | xfs_dqtrace_entry(dqp, "FLUSHALL: DQDIRTY"); | |
511 | /* XXX a sentinel would be better */ | |
512 | recl = XFS_QI_MPLRECLAIMS(mp); | |
513 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
514 | /* | |
515 | * If we can't grab the flush lock then check | |
516 | * to see if the dquot has been flushed delayed | |
517 | * write. If so, grab its buffer and send it | |
518 | * out immediately. We'll be able to acquire | |
519 | * the flush lock when the I/O completes. | |
520 | */ | |
521 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
522 | } | |
523 | /* | |
524 | * Let go of the mplist lock. We don't want to hold it | |
525 | * across a disk write. | |
526 | */ | |
527 | xfs_qm_mplist_unlock(mp); | |
528 | error = xfs_qm_dqflush(dqp, flags); | |
529 | xfs_dqunlock(dqp); | |
530 | if (error) | |
014c2544 | 531 | return error; |
1da177e4 LT |
532 | |
533 | xfs_qm_mplist_lock(mp); | |
534 | if (recl != XFS_QI_MPLRECLAIMS(mp)) { | |
535 | xfs_qm_mplist_unlock(mp); | |
536 | /* XXX restart limit */ | |
537 | goto again; | |
538 | } | |
539 | } | |
540 | ||
541 | xfs_qm_mplist_unlock(mp); | |
542 | /* return ! busy */ | |
014c2544 | 543 | return 0; |
1da177e4 LT |
544 | } |
545 | /* | |
546 | * Release the group dquot pointers the user dquots may be | |
547 | * carrying around as a hint. mplist is locked on entry and exit. | |
548 | */ | |
549 | STATIC void | |
550 | xfs_qm_detach_gdquots( | |
551 | xfs_mount_t *mp) | |
552 | { | |
553 | xfs_dquot_t *dqp, *gdqp; | |
554 | int nrecl; | |
555 | ||
556 | again: | |
557 | ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp)); | |
558 | dqp = XFS_QI_MPLNEXT(mp); | |
559 | while (dqp) { | |
560 | xfs_dqlock(dqp); | |
561 | if ((gdqp = dqp->q_gdquot)) { | |
562 | xfs_dqlock(gdqp); | |
563 | dqp->q_gdquot = NULL; | |
564 | } | |
565 | xfs_dqunlock(dqp); | |
566 | ||
567 | if (gdqp) { | |
568 | /* | |
569 | * Can't hold the mplist lock across a dqput. | |
570 | * XXXmust convert to marker based iterations here. | |
571 | */ | |
572 | nrecl = XFS_QI_MPLRECLAIMS(mp); | |
573 | xfs_qm_mplist_unlock(mp); | |
574 | xfs_qm_dqput(gdqp); | |
575 | ||
576 | xfs_qm_mplist_lock(mp); | |
577 | if (nrecl != XFS_QI_MPLRECLAIMS(mp)) | |
578 | goto again; | |
579 | } | |
580 | dqp = dqp->MPL_NEXT; | |
581 | } | |
582 | } | |
583 | ||
584 | /* | |
585 | * Go through all the incore dquots of this file system and take them | |
586 | * off the mplist and hashlist, if the dquot type matches the dqtype | |
587 | * parameter. This is used when turning off quota accounting for | |
588 | * users and/or groups, as well as when the filesystem is unmounting. | |
589 | */ | |
590 | STATIC int | |
591 | xfs_qm_dqpurge_int( | |
592 | xfs_mount_t *mp, | |
c8ad20ff | 593 | uint flags) /* QUOTAOFF/UMOUNTING/UQUOTA/PQUOTA/GQUOTA */ |
1da177e4 LT |
594 | { |
595 | xfs_dquot_t *dqp; | |
596 | uint dqtype; | |
597 | int nrecl; | |
598 | xfs_dquot_t *nextdqp; | |
599 | int nmisses; | |
600 | ||
601 | if (mp->m_quotainfo == NULL) | |
014c2544 | 602 | return 0; |
1da177e4 LT |
603 | |
604 | dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0; | |
c8ad20ff | 605 | dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0; |
1da177e4 LT |
606 | dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0; |
607 | ||
608 | xfs_qm_mplist_lock(mp); | |
609 | ||
610 | /* | |
611 | * In the first pass through all incore dquots of this filesystem, | |
612 | * we release the group dquot pointers the user dquots may be | |
613 | * carrying around as a hint. We need to do this irrespective of | |
614 | * what's being turned off. | |
615 | */ | |
616 | xfs_qm_detach_gdquots(mp); | |
617 | ||
618 | again: | |
619 | nmisses = 0; | |
620 | ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp)); | |
621 | /* | |
622 | * Try to get rid of all of the unwanted dquots. The idea is to | |
623 | * get them off mplist and hashlist, but leave them on freelist. | |
624 | */ | |
625 | dqp = XFS_QI_MPLNEXT(mp); | |
626 | while (dqp) { | |
627 | /* | |
628 | * It's OK to look at the type without taking dqlock here. | |
629 | * We're holding the mplist lock here, and that's needed for | |
630 | * a dqreclaim. | |
631 | */ | |
632 | if ((dqp->dq_flags & dqtype) == 0) { | |
633 | dqp = dqp->MPL_NEXT; | |
634 | continue; | |
635 | } | |
636 | ||
637 | if (! xfs_qm_dqhashlock_nowait(dqp)) { | |
638 | nrecl = XFS_QI_MPLRECLAIMS(mp); | |
639 | xfs_qm_mplist_unlock(mp); | |
640 | XFS_DQ_HASH_LOCK(dqp->q_hash); | |
641 | xfs_qm_mplist_lock(mp); | |
642 | ||
643 | /* | |
644 | * XXXTheoretically, we can get into a very long | |
645 | * ping pong game here. | |
646 | * No one can be adding dquots to the mplist at | |
647 | * this point, but somebody might be taking things off. | |
648 | */ | |
649 | if (nrecl != XFS_QI_MPLRECLAIMS(mp)) { | |
650 | XFS_DQ_HASH_UNLOCK(dqp->q_hash); | |
651 | goto again; | |
652 | } | |
653 | } | |
654 | ||
655 | /* | |
656 | * Take the dquot off the mplist and hashlist. It may remain on | |
657 | * freelist in INACTIVE state. | |
658 | */ | |
659 | nextdqp = dqp->MPL_NEXT; | |
660 | nmisses += xfs_qm_dqpurge(dqp, flags); | |
661 | dqp = nextdqp; | |
662 | } | |
663 | xfs_qm_mplist_unlock(mp); | |
664 | return nmisses; | |
665 | } | |
666 | ||
667 | int | |
668 | xfs_qm_dqpurge_all( | |
669 | xfs_mount_t *mp, | |
670 | uint flags) | |
671 | { | |
672 | int ndquots; | |
673 | ||
674 | /* | |
675 | * Purge the dquot cache. | |
676 | * None of the dquots should really be busy at this point. | |
677 | */ | |
678 | if (mp->m_quotainfo) { | |
679 | while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) { | |
680 | delay(ndquots * 10); | |
681 | } | |
682 | } | |
683 | return 0; | |
684 | } | |
685 | ||
686 | STATIC int | |
687 | xfs_qm_dqattach_one( | |
688 | xfs_inode_t *ip, | |
689 | xfs_dqid_t id, | |
690 | uint type, | |
691 | uint doalloc, | |
692 | uint dolock, | |
693 | xfs_dquot_t *udqhint, /* hint */ | |
694 | xfs_dquot_t **IO_idqpp) | |
695 | { | |
696 | xfs_dquot_t *dqp; | |
697 | int error; | |
698 | ||
699 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
700 | error = 0; | |
701 | /* | |
702 | * See if we already have it in the inode itself. IO_idqpp is | |
703 | * &i_udquot or &i_gdquot. This made the code look weird, but | |
704 | * made the logic a lot simpler. | |
705 | */ | |
706 | if ((dqp = *IO_idqpp)) { | |
707 | if (dolock) | |
708 | xfs_dqlock(dqp); | |
709 | xfs_dqtrace_entry(dqp, "DQATTACH: found in ip"); | |
710 | goto done; | |
711 | } | |
712 | ||
713 | /* | |
714 | * udqhint is the i_udquot field in inode, and is non-NULL only | |
c8ad20ff | 715 | * when the type arg is group/project. Its purpose is to save a |
1da177e4 LT |
716 | * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside |
717 | * the user dquot. | |
718 | */ | |
c8ad20ff | 719 | ASSERT(!udqhint || type == XFS_DQ_GROUP || type == XFS_DQ_PROJ); |
1da177e4 LT |
720 | if (udqhint && !dolock) |
721 | xfs_dqlock(udqhint); | |
722 | ||
723 | /* | |
724 | * No need to take dqlock to look at the id. | |
725 | * The ID can't change until it gets reclaimed, and it won't | |
726 | * be reclaimed as long as we have a ref from inode and we hold | |
727 | * the ilock. | |
728 | */ | |
729 | if (udqhint && | |
730 | (dqp = udqhint->q_gdquot) && | |
1149d96a | 731 | (be32_to_cpu(dqp->q_core.d_id) == id)) { |
1da177e4 LT |
732 | ASSERT(XFS_DQ_IS_LOCKED(udqhint)); |
733 | xfs_dqlock(dqp); | |
734 | XFS_DQHOLD(dqp); | |
735 | ASSERT(*IO_idqpp == NULL); | |
736 | *IO_idqpp = dqp; | |
737 | if (!dolock) { | |
738 | xfs_dqunlock(dqp); | |
739 | xfs_dqunlock(udqhint); | |
740 | } | |
741 | goto done; | |
742 | } | |
743 | /* | |
744 | * We can't hold a dquot lock when we call the dqget code. | |
745 | * We'll deadlock in no time, because of (not conforming to) | |
746 | * lock ordering - the inodelock comes before any dquot lock, | |
747 | * and we may drop and reacquire the ilock in xfs_qm_dqget(). | |
748 | */ | |
749 | if (udqhint) | |
750 | xfs_dqunlock(udqhint); | |
751 | /* | |
752 | * Find the dquot from somewhere. This bumps the | |
753 | * reference count of dquot and returns it locked. | |
754 | * This can return ENOENT if dquot didn't exist on | |
755 | * disk and we didn't ask it to allocate; | |
756 | * ESRCH if quotas got turned off suddenly. | |
757 | */ | |
758 | if ((error = xfs_qm_dqget(ip->i_mount, ip, id, type, | |
759 | doalloc|XFS_QMOPT_DOWARN, &dqp))) { | |
760 | if (udqhint && dolock) | |
761 | xfs_dqlock(udqhint); | |
762 | goto done; | |
763 | } | |
764 | ||
765 | xfs_dqtrace_entry(dqp, "DQATTACH: found by dqget"); | |
766 | /* | |
767 | * dqget may have dropped and re-acquired the ilock, but it guarantees | |
768 | * that the dquot returned is the one that should go in the inode. | |
769 | */ | |
770 | *IO_idqpp = dqp; | |
771 | ASSERT(dqp); | |
772 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
773 | if (! dolock) { | |
774 | xfs_dqunlock(dqp); | |
775 | goto done; | |
776 | } | |
777 | if (! udqhint) | |
778 | goto done; | |
779 | ||
780 | ASSERT(udqhint); | |
781 | ASSERT(dolock); | |
782 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
783 | if (! xfs_qm_dqlock_nowait(udqhint)) { | |
784 | xfs_dqunlock(dqp); | |
785 | xfs_dqlock(udqhint); | |
786 | xfs_dqlock(dqp); | |
787 | } | |
788 | done: | |
789 | #ifdef QUOTADEBUG | |
790 | if (udqhint) { | |
791 | if (dolock) | |
792 | ASSERT(XFS_DQ_IS_LOCKED(udqhint)); | |
793 | } | |
794 | if (! error) { | |
795 | if (dolock) | |
796 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
797 | } | |
798 | #endif | |
014c2544 | 799 | return error; |
1da177e4 LT |
800 | } |
801 | ||
802 | ||
803 | /* | |
804 | * Given a udquot and gdquot, attach a ptr to the group dquot in the | |
805 | * udquot as a hint for future lookups. The idea sounds simple, but the | |
806 | * execution isn't, because the udquot might have a group dquot attached | |
807 | * already and getting rid of that gets us into lock ordering contraints. | |
808 | * The process is complicated more by the fact that the dquots may or may not | |
809 | * be locked on entry. | |
810 | */ | |
811 | STATIC void | |
812 | xfs_qm_dqattach_grouphint( | |
813 | xfs_dquot_t *udq, | |
814 | xfs_dquot_t *gdq, | |
815 | uint locked) | |
816 | { | |
817 | xfs_dquot_t *tmp; | |
818 | ||
819 | #ifdef QUOTADEBUG | |
820 | if (locked) { | |
821 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
822 | ASSERT(XFS_DQ_IS_LOCKED(gdq)); | |
823 | } | |
824 | #endif | |
825 | if (! locked) | |
826 | xfs_dqlock(udq); | |
827 | ||
828 | if ((tmp = udq->q_gdquot)) { | |
829 | if (tmp == gdq) { | |
830 | if (! locked) | |
831 | xfs_dqunlock(udq); | |
832 | return; | |
833 | } | |
834 | ||
835 | udq->q_gdquot = NULL; | |
836 | /* | |
837 | * We can't keep any dqlocks when calling dqrele, | |
838 | * because the freelist lock comes before dqlocks. | |
839 | */ | |
840 | xfs_dqunlock(udq); | |
841 | if (locked) | |
842 | xfs_dqunlock(gdq); | |
843 | /* | |
844 | * we took a hard reference once upon a time in dqget, | |
845 | * so give it back when the udquot no longer points at it | |
846 | * dqput() does the unlocking of the dquot. | |
847 | */ | |
848 | xfs_qm_dqrele(tmp); | |
849 | ||
850 | xfs_dqlock(udq); | |
851 | xfs_dqlock(gdq); | |
852 | ||
853 | } else { | |
854 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
855 | if (! locked) { | |
856 | xfs_dqlock(gdq); | |
857 | } | |
858 | } | |
859 | ||
860 | ASSERT(XFS_DQ_IS_LOCKED(udq)); | |
861 | ASSERT(XFS_DQ_IS_LOCKED(gdq)); | |
862 | /* | |
863 | * Somebody could have attached a gdquot here, | |
864 | * when we dropped the uqlock. If so, just do nothing. | |
865 | */ | |
866 | if (udq->q_gdquot == NULL) { | |
867 | XFS_DQHOLD(gdq); | |
868 | udq->q_gdquot = gdq; | |
869 | } | |
870 | if (! locked) { | |
871 | xfs_dqunlock(gdq); | |
872 | xfs_dqunlock(udq); | |
873 | } | |
874 | } | |
875 | ||
876 | ||
877 | /* | |
c8ad20ff NS |
878 | * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON |
879 | * into account. | |
1da177e4 LT |
880 | * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed. |
881 | * If XFS_QMOPT_DQLOCK, the dquot(s) will be returned locked. This option pretty | |
882 | * much made this code a complete mess, but it has been pretty useful. | |
883 | * If XFS_QMOPT_ILOCKED, then inode sent is already locked EXCL. | |
884 | * Inode may get unlocked and relocked in here, and the caller must deal with | |
885 | * the consequences. | |
886 | */ | |
887 | int | |
888 | xfs_qm_dqattach( | |
889 | xfs_inode_t *ip, | |
890 | uint flags) | |
891 | { | |
892 | xfs_mount_t *mp = ip->i_mount; | |
893 | uint nquotas = 0; | |
894 | int error = 0; | |
895 | ||
896 | if ((! XFS_IS_QUOTA_ON(mp)) || | |
897 | (! XFS_NOT_DQATTACHED(mp, ip)) || | |
898 | (ip->i_ino == mp->m_sb.sb_uquotino) || | |
899 | (ip->i_ino == mp->m_sb.sb_gquotino)) | |
014c2544 | 900 | return 0; |
1da177e4 LT |
901 | |
902 | ASSERT((flags & XFS_QMOPT_ILOCKED) == 0 || | |
903 | XFS_ISLOCKED_INODE_EXCL(ip)); | |
904 | ||
905 | if (! (flags & XFS_QMOPT_ILOCKED)) | |
906 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
907 | ||
908 | if (XFS_IS_UQUOTA_ON(mp)) { | |
909 | error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER, | |
910 | flags & XFS_QMOPT_DQALLOC, | |
911 | flags & XFS_QMOPT_DQLOCK, | |
912 | NULL, &ip->i_udquot); | |
913 | if (error) | |
914 | goto done; | |
915 | nquotas++; | |
916 | } | |
917 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
c8ad20ff NS |
918 | if (XFS_IS_OQUOTA_ON(mp)) { |
919 | error = XFS_IS_GQUOTA_ON(mp) ? | |
920 | xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP, | |
921 | flags & XFS_QMOPT_DQALLOC, | |
922 | flags & XFS_QMOPT_DQLOCK, | |
923 | ip->i_udquot, &ip->i_gdquot) : | |
924 | xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ, | |
1da177e4 LT |
925 | flags & XFS_QMOPT_DQALLOC, |
926 | flags & XFS_QMOPT_DQLOCK, | |
927 | ip->i_udquot, &ip->i_gdquot); | |
928 | /* | |
929 | * Don't worry about the udquot that we may have | |
930 | * attached above. It'll get detached, if not already. | |
931 | */ | |
932 | if (error) | |
933 | goto done; | |
934 | nquotas++; | |
935 | } | |
936 | ||
937 | /* | |
938 | * Attach this group quota to the user quota as a hint. | |
939 | * This WON'T, in general, result in a thrash. | |
940 | */ | |
941 | if (nquotas == 2) { | |
942 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
943 | ASSERT(ip->i_udquot); | |
944 | ASSERT(ip->i_gdquot); | |
945 | ||
946 | /* | |
947 | * We may or may not have the i_udquot locked at this point, | |
948 | * but this check is OK since we don't depend on the i_gdquot to | |
949 | * be accurate 100% all the time. It is just a hint, and this | |
950 | * will succeed in general. | |
951 | */ | |
952 | if (ip->i_udquot->q_gdquot == ip->i_gdquot) | |
953 | goto done; | |
954 | /* | |
955 | * Attach i_gdquot to the gdquot hint inside the i_udquot. | |
956 | */ | |
957 | xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot, | |
958 | flags & XFS_QMOPT_DQLOCK); | |
959 | } | |
960 | ||
961 | done: | |
962 | ||
963 | #ifdef QUOTADEBUG | |
964 | if (! error) { | |
965 | if (ip->i_udquot) { | |
966 | if (flags & XFS_QMOPT_DQLOCK) | |
967 | ASSERT(XFS_DQ_IS_LOCKED(ip->i_udquot)); | |
968 | } | |
969 | if (ip->i_gdquot) { | |
970 | if (flags & XFS_QMOPT_DQLOCK) | |
971 | ASSERT(XFS_DQ_IS_LOCKED(ip->i_gdquot)); | |
972 | } | |
973 | if (XFS_IS_UQUOTA_ON(mp)) | |
974 | ASSERT(ip->i_udquot); | |
c8ad20ff | 975 | if (XFS_IS_OQUOTA_ON(mp)) |
1da177e4 LT |
976 | ASSERT(ip->i_gdquot); |
977 | } | |
978 | #endif | |
979 | ||
980 | if (! (flags & XFS_QMOPT_ILOCKED)) | |
981 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
982 | ||
983 | #ifdef QUOTADEBUG | |
984 | else | |
985 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
986 | #endif | |
014c2544 | 987 | return error; |
1da177e4 LT |
988 | } |
989 | ||
990 | /* | |
991 | * Release dquots (and their references) if any. | |
992 | * The inode should be locked EXCL except when this's called by | |
993 | * xfs_ireclaim. | |
994 | */ | |
995 | void | |
996 | xfs_qm_dqdetach( | |
997 | xfs_inode_t *ip) | |
998 | { | |
999 | if (!(ip->i_udquot || ip->i_gdquot)) | |
1000 | return; | |
1001 | ||
1002 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino); | |
1003 | ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino); | |
1da177e4 | 1004 | if (ip->i_udquot) { |
c8ad20ff | 1005 | xfs_dqtrace_entry_ino(ip->i_udquot, "DQDETTACH", ip); |
1da177e4 LT |
1006 | xfs_qm_dqrele(ip->i_udquot); |
1007 | ip->i_udquot = NULL; | |
1008 | } | |
1009 | if (ip->i_gdquot) { | |
c8ad20ff | 1010 | xfs_dqtrace_entry_ino(ip->i_gdquot, "DQDETTACH", ip); |
1da177e4 LT |
1011 | xfs_qm_dqrele(ip->i_gdquot); |
1012 | ip->i_gdquot = NULL; | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * This is called by VFS_SYNC and flags arg determines the caller, | |
1018 | * and its motives, as done in xfs_sync. | |
1019 | * | |
1020 | * vfs_sync: SYNC_FSDATA|SYNC_ATTR|SYNC_BDFLUSH 0x31 | |
1021 | * syscall sync: SYNC_FSDATA|SYNC_ATTR|SYNC_DELWRI 0x25 | |
1022 | * umountroot : SYNC_WAIT | SYNC_CLOSE | SYNC_ATTR | SYNC_FSDATA | |
1023 | */ | |
1024 | ||
1025 | int | |
1026 | xfs_qm_sync( | |
1027 | xfs_mount_t *mp, | |
1028 | short flags) | |
1029 | { | |
1030 | int recl, restarts; | |
1031 | xfs_dquot_t *dqp; | |
1032 | uint flush_flags; | |
1033 | boolean_t nowait; | |
1034 | int error; | |
1035 | ||
1036 | restarts = 0; | |
1037 | /* | |
1038 | * We won't block unless we are asked to. | |
1039 | */ | |
1040 | nowait = (boolean_t)(flags & SYNC_BDFLUSH || (flags & SYNC_WAIT) == 0); | |
1041 | ||
1042 | again: | |
1043 | xfs_qm_mplist_lock(mp); | |
1044 | /* | |
1045 | * dqpurge_all() also takes the mplist lock and iterate thru all dquots | |
1046 | * in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared | |
1047 | * when we have the mplist lock, we know that dquots will be consistent | |
1048 | * as long as we have it locked. | |
1049 | */ | |
1050 | if (! XFS_IS_QUOTA_ON(mp)) { | |
1051 | xfs_qm_mplist_unlock(mp); | |
014c2544 | 1052 | return 0; |
1da177e4 LT |
1053 | } |
1054 | FOREACH_DQUOT_IN_MP(dqp, mp) { | |
1055 | /* | |
1056 | * If this is vfs_sync calling, then skip the dquots that | |
1057 | * don't 'seem' to be dirty. ie. don't acquire dqlock. | |
1058 | * This is very similar to what xfs_sync does with inodes. | |
1059 | */ | |
1060 | if (flags & SYNC_BDFLUSH) { | |
1061 | if (! XFS_DQ_IS_DIRTY(dqp)) | |
1062 | continue; | |
1063 | } | |
1064 | ||
1065 | if (nowait) { | |
1066 | /* | |
1067 | * Try to acquire the dquot lock. We are NOT out of | |
1068 | * lock order, but we just don't want to wait for this | |
1069 | * lock, unless somebody wanted us to. | |
1070 | */ | |
1071 | if (! xfs_qm_dqlock_nowait(dqp)) | |
1072 | continue; | |
1073 | } else { | |
1074 | xfs_dqlock(dqp); | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * Now, find out for sure if this dquot is dirty or not. | |
1079 | */ | |
1080 | if (! XFS_DQ_IS_DIRTY(dqp)) { | |
1081 | xfs_dqunlock(dqp); | |
1082 | continue; | |
1083 | } | |
1084 | ||
1085 | /* XXX a sentinel would be better */ | |
1086 | recl = XFS_QI_MPLRECLAIMS(mp); | |
1087 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
1088 | if (nowait) { | |
1089 | xfs_dqunlock(dqp); | |
1090 | continue; | |
1091 | } | |
1092 | /* | |
1093 | * If we can't grab the flush lock then if the caller | |
1094 | * really wanted us to give this our best shot, | |
1095 | * see if we can give a push to the buffer before we wait | |
1096 | * on the flush lock. At this point, we know that | |
1097 | * eventhough the dquot is being flushed, | |
1098 | * it has (new) dirty data. | |
1099 | */ | |
1100 | xfs_qm_dqflock_pushbuf_wait(dqp); | |
1101 | } | |
1102 | /* | |
1103 | * Let go of the mplist lock. We don't want to hold it | |
1104 | * across a disk write | |
1105 | */ | |
1106 | flush_flags = (nowait) ? XFS_QMOPT_DELWRI : XFS_QMOPT_SYNC; | |
1107 | xfs_qm_mplist_unlock(mp); | |
1108 | xfs_dqtrace_entry(dqp, "XQM_SYNC: DQFLUSH"); | |
1109 | error = xfs_qm_dqflush(dqp, flush_flags); | |
1110 | xfs_dqunlock(dqp); | |
1111 | if (error && XFS_FORCED_SHUTDOWN(mp)) | |
014c2544 | 1112 | return 0; /* Need to prevent umount failure */ |
1da177e4 | 1113 | else if (error) |
014c2544 | 1114 | return error; |
1da177e4 LT |
1115 | |
1116 | xfs_qm_mplist_lock(mp); | |
1117 | if (recl != XFS_QI_MPLRECLAIMS(mp)) { | |
1118 | if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS) | |
1119 | break; | |
1120 | ||
1121 | xfs_qm_mplist_unlock(mp); | |
1122 | goto again; | |
1123 | } | |
1124 | } | |
1125 | ||
1126 | xfs_qm_mplist_unlock(mp); | |
014c2544 | 1127 | return 0; |
1da177e4 LT |
1128 | } |
1129 | ||
1130 | ||
1131 | /* | |
1132 | * This initializes all the quota information that's kept in the | |
1133 | * mount structure | |
1134 | */ | |
ba0f32d4 | 1135 | STATIC int |
1da177e4 LT |
1136 | xfs_qm_init_quotainfo( |
1137 | xfs_mount_t *mp) | |
1138 | { | |
1139 | xfs_quotainfo_t *qinf; | |
1140 | int error; | |
1141 | xfs_dquot_t *dqp; | |
1142 | ||
1143 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1144 | ||
1145 | /* | |
1146 | * Tell XQM that we exist as soon as possible. | |
1147 | */ | |
1148 | if ((error = xfs_qm_hold_quotafs_ref(mp))) { | |
014c2544 | 1149 | return error; |
1da177e4 LT |
1150 | } |
1151 | ||
1152 | qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP); | |
1153 | ||
1154 | /* | |
1155 | * See if quotainodes are setup, and if not, allocate them, | |
1156 | * and change the superblock accordingly. | |
1157 | */ | |
1158 | if ((error = xfs_qm_init_quotainos(mp))) { | |
1159 | kmem_free(qinf, sizeof(xfs_quotainfo_t)); | |
1160 | mp->m_quotainfo = NULL; | |
014c2544 | 1161 | return error; |
1da177e4 LT |
1162 | } |
1163 | ||
1164 | spinlock_init(&qinf->qi_pinlock, "xfs_qinf_pin"); | |
1165 | xfs_qm_list_init(&qinf->qi_dqlist, "mpdqlist", 0); | |
1166 | qinf->qi_dqreclaims = 0; | |
1167 | ||
1168 | /* mutex used to serialize quotaoffs */ | |
794ee1ba | 1169 | mutex_init(&qinf->qi_quotaofflock); |
1da177e4 LT |
1170 | |
1171 | /* Precalc some constants */ | |
1172 | qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1173 | ASSERT(qinf->qi_dqchunklen); | |
1174 | qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen); | |
1175 | do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t)); | |
1176 | ||
1177 | mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD); | |
1178 | ||
1179 | /* | |
1180 | * We try to get the limits from the superuser's limits fields. | |
1181 | * This is quite hacky, but it is standard quota practice. | |
1182 | * We look at the USR dquot with id == 0 first, but if user quotas | |
1183 | * are not enabled we goto the GRP dquot with id == 0. | |
1184 | * We don't really care to keep separate default limits for user | |
1185 | * and group quotas, at least not at this point. | |
1186 | */ | |
1187 | error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0, | |
c8ad20ff NS |
1188 | XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER : |
1189 | (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP : | |
1190 | XFS_DQ_PROJ), | |
1da177e4 LT |
1191 | XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN, |
1192 | &dqp); | |
1193 | if (! error) { | |
1194 | xfs_disk_dquot_t *ddqp = &dqp->q_core; | |
1195 | ||
1196 | /* | |
1197 | * The warnings and timers set the grace period given to | |
1198 | * a user or group before he or she can not perform any | |
1199 | * more writing. If it is zero, a default is used. | |
1200 | */ | |
1149d96a CH |
1201 | qinf->qi_btimelimit = ddqp->d_btimer ? |
1202 | be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT; | |
1203 | qinf->qi_itimelimit = ddqp->d_itimer ? | |
1204 | be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT; | |
1205 | qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ? | |
1206 | be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT; | |
1207 | qinf->qi_bwarnlimit = ddqp->d_bwarns ? | |
1208 | be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT; | |
1209 | qinf->qi_iwarnlimit = ddqp->d_iwarns ? | |
1210 | be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT; | |
1211 | qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ? | |
1212 | be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT; | |
1213 | qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit); | |
1214 | qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit); | |
1215 | qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit); | |
1216 | qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit); | |
1217 | qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit); | |
1218 | qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit); | |
1da177e4 LT |
1219 | |
1220 | /* | |
1221 | * We sent the XFS_QMOPT_DQSUSER flag to dqget because | |
1222 | * we don't want this dquot cached. We haven't done a | |
1223 | * quotacheck yet, and quotacheck doesn't like incore dquots. | |
1224 | */ | |
1225 | xfs_qm_dqdestroy(dqp); | |
1226 | } else { | |
1227 | qinf->qi_btimelimit = XFS_QM_BTIMELIMIT; | |
1228 | qinf->qi_itimelimit = XFS_QM_ITIMELIMIT; | |
1229 | qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT; | |
1230 | qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT; | |
1231 | qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT; | |
06d10dd9 | 1232 | qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT; |
1da177e4 LT |
1233 | } |
1234 | ||
014c2544 | 1235 | return 0; |
1da177e4 LT |
1236 | } |
1237 | ||
1238 | ||
1239 | /* | |
1240 | * Gets called when unmounting a filesystem or when all quotas get | |
1241 | * turned off. | |
1242 | * This purges the quota inodes, destroys locks and frees itself. | |
1243 | */ | |
1244 | void | |
1245 | xfs_qm_destroy_quotainfo( | |
1246 | xfs_mount_t *mp) | |
1247 | { | |
1248 | xfs_quotainfo_t *qi; | |
1249 | ||
1250 | qi = mp->m_quotainfo; | |
1251 | ASSERT(qi != NULL); | |
1252 | ASSERT(xfs_Gqm != NULL); | |
1253 | ||
1254 | /* | |
1255 | * Release the reference that XQM kept, so that we know | |
1256 | * when the XQM structure should be freed. We cannot assume | |
1257 | * that xfs_Gqm is non-null after this point. | |
1258 | */ | |
1259 | xfs_qm_rele_quotafs_ref(mp); | |
1260 | ||
1261 | spinlock_destroy(&qi->qi_pinlock); | |
1262 | xfs_qm_list_destroy(&qi->qi_dqlist); | |
1263 | ||
1264 | if (qi->qi_uquotaip) { | |
1265 | XFS_PURGE_INODE(qi->qi_uquotaip); | |
1266 | qi->qi_uquotaip = NULL; /* paranoia */ | |
1267 | } | |
1268 | if (qi->qi_gquotaip) { | |
1269 | XFS_PURGE_INODE(qi->qi_gquotaip); | |
1270 | qi->qi_gquotaip = NULL; | |
1271 | } | |
1272 | mutex_destroy(&qi->qi_quotaofflock); | |
1273 | kmem_free(qi, sizeof(xfs_quotainfo_t)); | |
1274 | mp->m_quotainfo = NULL; | |
1275 | } | |
1276 | ||
1277 | ||
1278 | ||
1279 | /* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */ | |
1280 | ||
1281 | /* ARGSUSED */ | |
1282 | STATIC void | |
1283 | xfs_qm_list_init( | |
1284 | xfs_dqlist_t *list, | |
1285 | char *str, | |
1286 | int n) | |
1287 | { | |
794ee1ba | 1288 | mutex_init(&list->qh_lock); |
1da177e4 LT |
1289 | list->qh_next = NULL; |
1290 | list->qh_version = 0; | |
1291 | list->qh_nelems = 0; | |
1292 | } | |
1293 | ||
1294 | STATIC void | |
1295 | xfs_qm_list_destroy( | |
1296 | xfs_dqlist_t *list) | |
1297 | { | |
1298 | mutex_destroy(&(list->qh_lock)); | |
1299 | } | |
1300 | ||
1301 | ||
1302 | /* | |
1303 | * Stripped down version of dqattach. This doesn't attach, or even look at the | |
1304 | * dquots attached to the inode. The rationale is that there won't be any | |
1305 | * attached at the time this is called from quotacheck. | |
1306 | */ | |
1307 | STATIC int | |
1308 | xfs_qm_dqget_noattach( | |
1309 | xfs_inode_t *ip, | |
1310 | xfs_dquot_t **O_udqpp, | |
1311 | xfs_dquot_t **O_gdqpp) | |
1312 | { | |
1313 | int error; | |
1314 | xfs_mount_t *mp; | |
1315 | xfs_dquot_t *udqp, *gdqp; | |
1316 | ||
1317 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
1318 | mp = ip->i_mount; | |
1319 | udqp = NULL; | |
1320 | gdqp = NULL; | |
1321 | ||
1322 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1323 | ASSERT(ip->i_udquot == NULL); | |
1324 | /* | |
1325 | * We want the dquot allocated if it doesn't exist. | |
1326 | */ | |
1327 | if ((error = xfs_qm_dqget(mp, ip, ip->i_d.di_uid, XFS_DQ_USER, | |
1328 | XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, | |
1329 | &udqp))) { | |
1330 | /* | |
1331 | * Shouldn't be able to turn off quotas here. | |
1332 | */ | |
1333 | ASSERT(error != ESRCH); | |
1334 | ASSERT(error != ENOENT); | |
014c2544 | 1335 | return error; |
1da177e4 LT |
1336 | } |
1337 | ASSERT(udqp); | |
1338 | } | |
1339 | ||
c8ad20ff | 1340 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1341 | ASSERT(ip->i_gdquot == NULL); |
1342 | if (udqp) | |
1343 | xfs_dqunlock(udqp); | |
c8ad20ff NS |
1344 | error = XFS_IS_GQUOTA_ON(mp) ? |
1345 | xfs_qm_dqget(mp, ip, | |
1346 | ip->i_d.di_gid, XFS_DQ_GROUP, | |
1347 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1348 | &gdqp) : | |
1349 | xfs_qm_dqget(mp, ip, | |
1350 | ip->i_d.di_projid, XFS_DQ_PROJ, | |
1351 | XFS_QMOPT_DQALLOC|XFS_QMOPT_DOWARN, | |
1352 | &gdqp); | |
1353 | if (error) { | |
1da177e4 LT |
1354 | if (udqp) |
1355 | xfs_qm_dqrele(udqp); | |
1356 | ASSERT(error != ESRCH); | |
1357 | ASSERT(error != ENOENT); | |
014c2544 | 1358 | return error; |
1da177e4 LT |
1359 | } |
1360 | ASSERT(gdqp); | |
1361 | ||
1362 | /* Reacquire the locks in the right order */ | |
1363 | if (udqp) { | |
1364 | if (! xfs_qm_dqlock_nowait(udqp)) { | |
1365 | xfs_dqunlock(gdqp); | |
1366 | xfs_dqlock(udqp); | |
1367 | xfs_dqlock(gdqp); | |
1368 | } | |
1369 | } | |
1370 | } | |
1371 | ||
1372 | *O_udqpp = udqp; | |
1373 | *O_gdqpp = gdqp; | |
1374 | ||
1375 | #ifdef QUOTADEBUG | |
1376 | if (udqp) ASSERT(XFS_DQ_IS_LOCKED(udqp)); | |
1377 | if (gdqp) ASSERT(XFS_DQ_IS_LOCKED(gdqp)); | |
1378 | #endif | |
014c2544 | 1379 | return 0; |
1da177e4 LT |
1380 | } |
1381 | ||
1382 | /* | |
1383 | * Create an inode and return with a reference already taken, but unlocked | |
1384 | * This is how we create quota inodes | |
1385 | */ | |
1386 | STATIC int | |
1387 | xfs_qm_qino_alloc( | |
1388 | xfs_mount_t *mp, | |
1389 | xfs_inode_t **ip, | |
1390 | __int64_t sbfields, | |
1391 | uint flags) | |
1392 | { | |
1393 | xfs_trans_t *tp; | |
1394 | int error; | |
061f7209 | 1395 | unsigned long s; |
1da177e4 | 1396 | cred_t zerocr; |
061f7209 | 1397 | xfs_inode_t zeroino; |
1da177e4 LT |
1398 | int committed; |
1399 | ||
061f7209 | 1400 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE); |
1da177e4 LT |
1401 | if ((error = xfs_trans_reserve(tp, |
1402 | XFS_QM_QINOCREATE_SPACE_RES(mp), | |
1403 | XFS_CREATE_LOG_RES(mp), 0, | |
1404 | XFS_TRANS_PERM_LOG_RES, | |
1405 | XFS_CREATE_LOG_COUNT))) { | |
1406 | xfs_trans_cancel(tp, 0); | |
014c2544 | 1407 | return error; |
1da177e4 LT |
1408 | } |
1409 | memset(&zerocr, 0, sizeof(zerocr)); | |
061f7209 | 1410 | memset(&zeroino, 0, sizeof(zeroino)); |
1da177e4 | 1411 | |
061f7209 | 1412 | if ((error = xfs_dir_ialloc(&tp, &zeroino, S_IFREG, 1, 0, |
1da177e4 LT |
1413 | &zerocr, 0, 1, ip, &committed))) { |
1414 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | | |
1415 | XFS_TRANS_ABORT); | |
014c2544 | 1416 | return error; |
1da177e4 LT |
1417 | } |
1418 | ||
1419 | /* | |
1420 | * Keep an extra reference to this quota inode. This inode is | |
1421 | * locked exclusively and joined to the transaction already. | |
1422 | */ | |
1423 | ASSERT(XFS_ISLOCKED_INODE_EXCL(*ip)); | |
1424 | VN_HOLD(XFS_ITOV((*ip))); | |
1425 | ||
1426 | /* | |
1427 | * Make the changes in the superblock, and log those too. | |
1428 | * sbfields arg may contain fields other than *QUOTINO; | |
1429 | * VERSIONNUM for example. | |
1430 | */ | |
1431 | s = XFS_SB_LOCK(mp); | |
1432 | if (flags & XFS_QMOPT_SBVERSION) { | |
1433 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1434 | unsigned oldv = mp->m_sb.sb_versionnum; | |
1435 | #endif | |
1436 | ASSERT(!XFS_SB_VERSION_HASQUOTA(&mp->m_sb)); | |
1437 | ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1438 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) == | |
1439 | (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
1440 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS)); | |
1441 | ||
1442 | XFS_SB_VERSION_ADDQUOTA(&mp->m_sb); | |
1443 | mp->m_sb.sb_uquotino = NULLFSINO; | |
1444 | mp->m_sb.sb_gquotino = NULLFSINO; | |
1445 | ||
1446 | /* qflags will get updated _after_ quotacheck */ | |
1447 | mp->m_sb.sb_qflags = 0; | |
1448 | #if defined(DEBUG) && defined(XFS_LOUD_RECOVERY) | |
1449 | cmn_err(CE_NOTE, | |
1450 | "Old superblock version %x, converting to %x.", | |
1451 | oldv, mp->m_sb.sb_versionnum); | |
1452 | #endif | |
1453 | } | |
1454 | if (flags & XFS_QMOPT_UQUOTA) | |
1455 | mp->m_sb.sb_uquotino = (*ip)->i_ino; | |
1456 | else | |
1457 | mp->m_sb.sb_gquotino = (*ip)->i_ino; | |
1458 | XFS_SB_UNLOCK(mp, s); | |
1459 | xfs_mod_sb(tp, sbfields); | |
1460 | ||
1461 | if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, | |
1462 | NULL))) { | |
1463 | xfs_fs_cmn_err(CE_ALERT, mp, "XFS qino_alloc failed!"); | |
014c2544 | 1464 | return error; |
1da177e4 | 1465 | } |
014c2544 | 1466 | return 0; |
1da177e4 LT |
1467 | } |
1468 | ||
1469 | ||
1470 | STATIC int | |
1471 | xfs_qm_reset_dqcounts( | |
1472 | xfs_mount_t *mp, | |
1473 | xfs_buf_t *bp, | |
1474 | xfs_dqid_t id, | |
1475 | uint type) | |
1476 | { | |
1477 | xfs_disk_dquot_t *ddq; | |
1478 | int j; | |
1479 | ||
1480 | xfs_buftrace("RESET DQUOTS", bp); | |
1481 | /* | |
1482 | * Reset all counters and timers. They'll be | |
1483 | * started afresh by xfs_qm_quotacheck. | |
1484 | */ | |
1485 | #ifdef DEBUG | |
1486 | j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB); | |
1487 | do_div(j, sizeof(xfs_dqblk_t)); | |
1488 | ASSERT(XFS_QM_DQPERBLK(mp) == j); | |
1489 | #endif | |
1490 | ddq = (xfs_disk_dquot_t *)XFS_BUF_PTR(bp); | |
1491 | for (j = 0; j < XFS_QM_DQPERBLK(mp); j++) { | |
1492 | /* | |
1493 | * Do a sanity check, and if needed, repair the dqblk. Don't | |
1494 | * output any warnings because it's perfectly possible to | |
1495 | * find unitialized dquot blks. See comment in xfs_qm_dqcheck. | |
1496 | */ | |
1497 | (void) xfs_qm_dqcheck(ddq, id+j, type, XFS_QMOPT_DQREPAIR, | |
1498 | "xfs_quotacheck"); | |
1149d96a CH |
1499 | ddq->d_bcount = 0; |
1500 | ddq->d_icount = 0; | |
1501 | ddq->d_rtbcount = 0; | |
1502 | ddq->d_btimer = 0; | |
1503 | ddq->d_itimer = 0; | |
1504 | ddq->d_rtbtimer = 0; | |
1505 | ddq->d_bwarns = 0; | |
1506 | ddq->d_iwarns = 0; | |
1507 | ddq->d_rtbwarns = 0; | |
1da177e4 LT |
1508 | ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1); |
1509 | } | |
1510 | ||
014c2544 | 1511 | return 0; |
1da177e4 LT |
1512 | } |
1513 | ||
1514 | STATIC int | |
1515 | xfs_qm_dqiter_bufs( | |
1516 | xfs_mount_t *mp, | |
1517 | xfs_dqid_t firstid, | |
1518 | xfs_fsblock_t bno, | |
1519 | xfs_filblks_t blkcnt, | |
1520 | uint flags) | |
1521 | { | |
1522 | xfs_buf_t *bp; | |
1523 | int error; | |
1524 | int notcommitted; | |
1525 | int incr; | |
c8ad20ff | 1526 | int type; |
1da177e4 LT |
1527 | |
1528 | ASSERT(blkcnt > 0); | |
1529 | notcommitted = 0; | |
1530 | incr = (blkcnt > XFS_QM_MAX_DQCLUSTER_LOGSZ) ? | |
1531 | XFS_QM_MAX_DQCLUSTER_LOGSZ : blkcnt; | |
c8ad20ff NS |
1532 | type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER : |
1533 | (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP); | |
1da177e4 LT |
1534 | error = 0; |
1535 | ||
1536 | /* | |
1537 | * Blkcnt arg can be a very big number, and might even be | |
1538 | * larger than the log itself. So, we have to break it up into | |
1539 | * manageable-sized transactions. | |
1540 | * Note that we don't start a permanent transaction here; we might | |
1541 | * not be able to get a log reservation for the whole thing up front, | |
1542 | * and we don't really care to either, because we just discard | |
1543 | * everything if we were to crash in the middle of this loop. | |
1544 | */ | |
1545 | while (blkcnt--) { | |
1546 | error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, | |
1547 | XFS_FSB_TO_DADDR(mp, bno), | |
1548 | (int)XFS_QI_DQCHUNKLEN(mp), 0, &bp); | |
1549 | if (error) | |
1550 | break; | |
1551 | ||
c8ad20ff | 1552 | (void) xfs_qm_reset_dqcounts(mp, bp, firstid, type); |
1da177e4 LT |
1553 | xfs_bdwrite(mp, bp); |
1554 | /* | |
1555 | * goto the next block. | |
1556 | */ | |
1557 | bno++; | |
1558 | firstid += XFS_QM_DQPERBLK(mp); | |
1559 | } | |
014c2544 | 1560 | return error; |
1da177e4 LT |
1561 | } |
1562 | ||
1563 | /* | |
c8ad20ff | 1564 | * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a |
1da177e4 LT |
1565 | * caller supplied function for every chunk of dquots that we find. |
1566 | */ | |
1567 | STATIC int | |
1568 | xfs_qm_dqiterate( | |
1569 | xfs_mount_t *mp, | |
1570 | xfs_inode_t *qip, | |
1571 | uint flags) | |
1572 | { | |
1573 | xfs_bmbt_irec_t *map; | |
1574 | int i, nmaps; /* number of map entries */ | |
1575 | int error; /* return value */ | |
1576 | xfs_fileoff_t lblkno; | |
1577 | xfs_filblks_t maxlblkcnt; | |
1578 | xfs_dqid_t firstid; | |
1579 | xfs_fsblock_t rablkno; | |
1580 | xfs_filblks_t rablkcnt; | |
1581 | ||
1582 | error = 0; | |
1583 | /* | |
1584 | * This looks racey, but we can't keep an inode lock across a | |
1585 | * trans_reserve. But, this gets called during quotacheck, and that | |
1586 | * happens only at mount time which is single threaded. | |
1587 | */ | |
1588 | if (qip->i_d.di_nblocks == 0) | |
014c2544 | 1589 | return 0; |
1da177e4 LT |
1590 | |
1591 | map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP); | |
1592 | ||
1593 | lblkno = 0; | |
1594 | maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); | |
1595 | do { | |
1596 | nmaps = XFS_DQITER_MAP_SIZE; | |
1597 | /* | |
1598 | * We aren't changing the inode itself. Just changing | |
1599 | * some of its data. No new blocks are added here, and | |
1600 | * the inode is never added to the transaction. | |
1601 | */ | |
1602 | xfs_ilock(qip, XFS_ILOCK_SHARED); | |
1603 | error = xfs_bmapi(NULL, qip, lblkno, | |
1604 | maxlblkcnt - lblkno, | |
1605 | XFS_BMAPI_METADATA, | |
1606 | NULL, | |
1607 | 0, map, &nmaps, NULL); | |
1608 | xfs_iunlock(qip, XFS_ILOCK_SHARED); | |
1609 | if (error) | |
1610 | break; | |
1611 | ||
1612 | ASSERT(nmaps <= XFS_DQITER_MAP_SIZE); | |
1613 | for (i = 0; i < nmaps; i++) { | |
1614 | ASSERT(map[i].br_startblock != DELAYSTARTBLOCK); | |
1615 | ASSERT(map[i].br_blockcount); | |
1616 | ||
1617 | ||
1618 | lblkno += map[i].br_blockcount; | |
1619 | ||
1620 | if (map[i].br_startblock == HOLESTARTBLOCK) | |
1621 | continue; | |
1622 | ||
1623 | firstid = (xfs_dqid_t) map[i].br_startoff * | |
1624 | XFS_QM_DQPERBLK(mp); | |
1625 | /* | |
1626 | * Do a read-ahead on the next extent. | |
1627 | */ | |
1628 | if ((i+1 < nmaps) && | |
1629 | (map[i+1].br_startblock != HOLESTARTBLOCK)) { | |
1630 | rablkcnt = map[i+1].br_blockcount; | |
1631 | rablkno = map[i+1].br_startblock; | |
1632 | while (rablkcnt--) { | |
1633 | xfs_baread(mp->m_ddev_targp, | |
1634 | XFS_FSB_TO_DADDR(mp, rablkno), | |
1635 | (int)XFS_QI_DQCHUNKLEN(mp)); | |
1636 | rablkno++; | |
1637 | } | |
1638 | } | |
1639 | /* | |
1640 | * Iterate thru all the blks in the extent and | |
1641 | * reset the counters of all the dquots inside them. | |
1642 | */ | |
1643 | if ((error = xfs_qm_dqiter_bufs(mp, | |
1644 | firstid, | |
1645 | map[i].br_startblock, | |
1646 | map[i].br_blockcount, | |
1647 | flags))) { | |
1648 | break; | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | if (error) | |
1653 | break; | |
1654 | } while (nmaps > 0); | |
1655 | ||
1656 | kmem_free(map, XFS_DQITER_MAP_SIZE * sizeof(*map)); | |
1657 | ||
014c2544 | 1658 | return error; |
1da177e4 LT |
1659 | } |
1660 | ||
1661 | /* | |
1662 | * Called by dqusage_adjust in doing a quotacheck. | |
1663 | * Given the inode, and a dquot (either USR or GRP, doesn't matter), | |
1664 | * this updates its incore copy as well as the buffer copy. This is | |
1665 | * so that once the quotacheck is done, we can just log all the buffers, | |
1666 | * as opposed to logging numerous updates to individual dquots. | |
1667 | */ | |
1668 | STATIC void | |
1669 | xfs_qm_quotacheck_dqadjust( | |
1670 | xfs_dquot_t *dqp, | |
1671 | xfs_qcnt_t nblks, | |
1672 | xfs_qcnt_t rtblks) | |
1673 | { | |
1674 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
1675 | xfs_dqtrace_entry(dqp, "QCHECK DQADJUST"); | |
1676 | /* | |
1677 | * Adjust the inode count and the block count to reflect this inode's | |
1678 | * resource usage. | |
1679 | */ | |
1149d96a | 1680 | be64_add(&dqp->q_core.d_icount, 1); |
1da177e4 LT |
1681 | dqp->q_res_icount++; |
1682 | if (nblks) { | |
1149d96a | 1683 | be64_add(&dqp->q_core.d_bcount, nblks); |
1da177e4 LT |
1684 | dqp->q_res_bcount += nblks; |
1685 | } | |
1686 | if (rtblks) { | |
1149d96a | 1687 | be64_add(&dqp->q_core.d_rtbcount, rtblks); |
1da177e4 LT |
1688 | dqp->q_res_rtbcount += rtblks; |
1689 | } | |
1690 | ||
1691 | /* | |
1692 | * Set default limits, adjust timers (since we changed usages) | |
1693 | */ | |
1694 | if (! XFS_IS_SUSER_DQUOT(dqp)) { | |
1695 | xfs_qm_adjust_dqlimits(dqp->q_mount, &dqp->q_core); | |
1696 | xfs_qm_adjust_dqtimers(dqp->q_mount, &dqp->q_core); | |
1697 | } | |
1698 | ||
1699 | dqp->dq_flags |= XFS_DQ_DIRTY; | |
1700 | } | |
1701 | ||
1702 | STATIC int | |
1703 | xfs_qm_get_rtblks( | |
1704 | xfs_inode_t *ip, | |
1705 | xfs_qcnt_t *O_rtblks) | |
1706 | { | |
1707 | xfs_filblks_t rtblks; /* total rt blks */ | |
1708 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1709 | xfs_extnum_t nextents; /* number of extent entries */ | |
1710 | xfs_bmbt_rec_t *base; /* base of extent array */ | |
1711 | xfs_bmbt_rec_t *ep; /* pointer to an extent entry */ | |
1712 | int error; | |
1713 | ||
1714 | ASSERT(XFS_IS_REALTIME_INODE(ip)); | |
1715 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
1716 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1717 | if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK))) | |
014c2544 | 1718 | return error; |
1da177e4 LT |
1719 | } |
1720 | rtblks = 0; | |
1721 | nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); | |
1722 | base = &ifp->if_u1.if_extents[0]; | |
1723 | for (ep = base; ep < &base[nextents]; ep++) | |
1724 | rtblks += xfs_bmbt_get_blockcount(ep); | |
1725 | *O_rtblks = (xfs_qcnt_t)rtblks; | |
014c2544 | 1726 | return 0; |
1da177e4 LT |
1727 | } |
1728 | ||
1729 | /* | |
1730 | * callback routine supplied to bulkstat(). Given an inumber, find its | |
1731 | * dquots and update them to account for resources taken by that inode. | |
1732 | */ | |
1733 | /* ARGSUSED */ | |
1734 | STATIC int | |
1735 | xfs_qm_dqusage_adjust( | |
1736 | xfs_mount_t *mp, /* mount point for filesystem */ | |
1737 | xfs_ino_t ino, /* inode number to get data for */ | |
1738 | void __user *buffer, /* not used */ | |
1739 | int ubsize, /* not used */ | |
1740 | void *private_data, /* not used */ | |
1741 | xfs_daddr_t bno, /* starting block of inode cluster */ | |
1742 | int *ubused, /* not used */ | |
1743 | void *dip, /* on-disk inode pointer (not used) */ | |
1744 | int *res) /* result code value */ | |
1745 | { | |
1746 | xfs_inode_t *ip; | |
1747 | xfs_dquot_t *udqp, *gdqp; | |
1748 | xfs_qcnt_t nblks, rtblks; | |
1749 | int error; | |
1750 | ||
1751 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1752 | ||
1753 | /* | |
1754 | * rootino must have its resources accounted for, not so with the quota | |
1755 | * inodes. | |
1756 | */ | |
1757 | if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) { | |
1758 | *res = BULKSTAT_RV_NOTHING; | |
1759 | return XFS_ERROR(EINVAL); | |
1760 | } | |
1761 | ||
1762 | /* | |
1763 | * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget | |
1764 | * interface expects the inode to be exclusively locked because that's | |
1765 | * the case in all other instances. It's OK that we do this because | |
1766 | * quotacheck is done only at mount time. | |
1767 | */ | |
1768 | if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) { | |
1769 | *res = BULKSTAT_RV_NOTHING; | |
014c2544 | 1770 | return error; |
1da177e4 LT |
1771 | } |
1772 | ||
1773 | if (ip->i_d.di_mode == 0) { | |
1774 | xfs_iput_new(ip, XFS_ILOCK_EXCL); | |
1775 | *res = BULKSTAT_RV_NOTHING; | |
1776 | return XFS_ERROR(ENOENT); | |
1777 | } | |
1778 | ||
1779 | /* | |
1780 | * Obtain the locked dquots. In case of an error (eg. allocation | |
1781 | * fails for ENOSPC), we return the negative of the error number | |
1782 | * to bulkstat, so that it can get propagated to quotacheck() and | |
1783 | * making us disable quotas for the file system. | |
1784 | */ | |
1785 | if ((error = xfs_qm_dqget_noattach(ip, &udqp, &gdqp))) { | |
1786 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1787 | *res = BULKSTAT_RV_GIVEUP; | |
014c2544 | 1788 | return error; |
1da177e4 LT |
1789 | } |
1790 | ||
1791 | rtblks = 0; | |
1792 | if (! XFS_IS_REALTIME_INODE(ip)) { | |
1793 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks; | |
1794 | } else { | |
1795 | /* | |
1796 | * Walk thru the extent list and count the realtime blocks. | |
1797 | */ | |
1798 | if ((error = xfs_qm_get_rtblks(ip, &rtblks))) { | |
1799 | xfs_iput(ip, XFS_ILOCK_EXCL); | |
1800 | if (udqp) | |
1801 | xfs_qm_dqput(udqp); | |
1802 | if (gdqp) | |
1803 | xfs_qm_dqput(gdqp); | |
1804 | *res = BULKSTAT_RV_GIVEUP; | |
014c2544 | 1805 | return error; |
1da177e4 LT |
1806 | } |
1807 | nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks; | |
1808 | } | |
1809 | ASSERT(ip->i_delayed_blks == 0); | |
1810 | ||
1811 | /* | |
1812 | * We can't release the inode while holding its dquot locks. | |
1813 | * The inode can go into inactive and might try to acquire the dquotlocks. | |
1814 | * So, just unlock here and do a vn_rele at the end. | |
1815 | */ | |
1816 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1817 | ||
1818 | /* | |
1819 | * Add the (disk blocks and inode) resources occupied by this | |
1820 | * inode to its dquots. We do this adjustment in the incore dquot, | |
1821 | * and also copy the changes to its buffer. | |
1822 | * We don't care about putting these changes in a transaction | |
1823 | * envelope because if we crash in the middle of a 'quotacheck' | |
1824 | * we have to start from the beginning anyway. | |
1825 | * Once we're done, we'll log all the dquot bufs. | |
1826 | * | |
1827 | * The *QUOTA_ON checks below may look pretty racey, but quotachecks | |
1828 | * and quotaoffs don't race. (Quotachecks happen at mount time only). | |
1829 | */ | |
1830 | if (XFS_IS_UQUOTA_ON(mp)) { | |
1831 | ASSERT(udqp); | |
1832 | xfs_qm_quotacheck_dqadjust(udqp, nblks, rtblks); | |
1833 | xfs_qm_dqput(udqp); | |
1834 | } | |
c8ad20ff | 1835 | if (XFS_IS_OQUOTA_ON(mp)) { |
1da177e4 LT |
1836 | ASSERT(gdqp); |
1837 | xfs_qm_quotacheck_dqadjust(gdqp, nblks, rtblks); | |
1838 | xfs_qm_dqput(gdqp); | |
1839 | } | |
1840 | /* | |
1841 | * Now release the inode. This will send it to 'inactive', and | |
1842 | * possibly even free blocks. | |
1843 | */ | |
1844 | VN_RELE(XFS_ITOV(ip)); | |
1845 | ||
1846 | /* | |
1847 | * Goto next inode. | |
1848 | */ | |
1849 | *res = BULKSTAT_RV_DIDONE; | |
014c2544 | 1850 | return 0; |
1da177e4 LT |
1851 | } |
1852 | ||
1853 | /* | |
1854 | * Walk thru all the filesystem inodes and construct a consistent view | |
1855 | * of the disk quota world. If the quotacheck fails, disable quotas. | |
1856 | */ | |
1857 | int | |
1858 | xfs_qm_quotacheck( | |
1859 | xfs_mount_t *mp) | |
1860 | { | |
1861 | int done, count, error; | |
1862 | xfs_ino_t lastino; | |
1863 | size_t structsz; | |
1864 | xfs_inode_t *uip, *gip; | |
1865 | uint flags; | |
1866 | ||
1867 | count = INT_MAX; | |
1868 | structsz = 1; | |
1869 | lastino = 0; | |
1870 | flags = 0; | |
1871 | ||
1872 | ASSERT(XFS_QI_UQIP(mp) || XFS_QI_GQIP(mp)); | |
1873 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
1874 | ||
1875 | /* | |
1876 | * There should be no cached dquots. The (simplistic) quotacheck | |
1877 | * algorithm doesn't like that. | |
1878 | */ | |
1879 | ASSERT(XFS_QI_MPLNDQUOTS(mp) == 0); | |
1880 | ||
1881 | cmn_err(CE_NOTE, "XFS quotacheck %s: Please wait.", mp->m_fsname); | |
1882 | ||
1883 | /* | |
c8ad20ff | 1884 | * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset |
1da177e4 LT |
1885 | * their counters to zero. We need a clean slate. |
1886 | * We don't log our changes till later. | |
1887 | */ | |
1888 | if ((uip = XFS_QI_UQIP(mp))) { | |
1889 | if ((error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA))) | |
1890 | goto error_return; | |
1891 | flags |= XFS_UQUOTA_CHKD; | |
1892 | } | |
1893 | ||
1894 | if ((gip = XFS_QI_GQIP(mp))) { | |
c8ad20ff NS |
1895 | if ((error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ? |
1896 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA))) | |
1da177e4 | 1897 | goto error_return; |
c8ad20ff | 1898 | flags |= XFS_OQUOTA_CHKD; |
1da177e4 LT |
1899 | } |
1900 | ||
1901 | do { | |
1902 | /* | |
1903 | * Iterate thru all the inodes in the file system, | |
1904 | * adjusting the corresponding dquot counters in core. | |
1905 | */ | |
1906 | if ((error = xfs_bulkstat(mp, &lastino, &count, | |
1907 | xfs_qm_dqusage_adjust, NULL, | |
1908 | structsz, NULL, | |
1909 | BULKSTAT_FG_IGET|BULKSTAT_FG_VFSLOCKED, | |
1910 | &done))) | |
1911 | break; | |
1912 | ||
1913 | } while (! done); | |
1914 | ||
1915 | /* | |
1916 | * We can get this error if we couldn't do a dquot allocation inside | |
1917 | * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the | |
1918 | * dirty dquots that might be cached, we just want to get rid of them | |
1919 | * and turn quotaoff. The dquots won't be attached to any of the inodes | |
1920 | * at this point (because we intentionally didn't in dqget_noattach). | |
1921 | */ | |
1922 | if (error) { | |
ee2a4f7c | 1923 | xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_QUOTAOFF); |
1da177e4 LT |
1924 | goto error_return; |
1925 | } | |
1926 | /* | |
1927 | * We've made all the changes that we need to make incore. | |
1928 | * Now flush_them down to disk buffers. | |
1929 | */ | |
1930 | xfs_qm_dqflush_all(mp, XFS_QMOPT_DELWRI); | |
1931 | ||
1932 | /* | |
1933 | * We didn't log anything, because if we crashed, we'll have to | |
1934 | * start the quotacheck from scratch anyway. However, we must make | |
1935 | * sure that our dquot changes are secure before we put the | |
1936 | * quotacheck'd stamp on the superblock. So, here we do a synchronous | |
1937 | * flush. | |
1938 | */ | |
1939 | XFS_bflush(mp->m_ddev_targp); | |
1940 | ||
1941 | /* | |
1942 | * If one type of quotas is off, then it will lose its | |
1943 | * quotachecked status, since we won't be doing accounting for | |
1944 | * that type anymore. | |
1945 | */ | |
c8ad20ff | 1946 | mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD); |
1da177e4 LT |
1947 | mp->m_qflags |= flags; |
1948 | ||
1949 | XQM_LIST_PRINT(&(XFS_QI_MPL_LIST(mp)), MPL_NEXT, "++++ Mp list +++"); | |
1950 | ||
1951 | error_return: | |
1952 | if (error) { | |
1953 | cmn_err(CE_WARN, "XFS quotacheck %s: Unsuccessful (Error %d): " | |
1954 | "Disabling quotas.", | |
1955 | mp->m_fsname, error); | |
1956 | /* | |
1957 | * We must turn off quotas. | |
1958 | */ | |
1959 | ASSERT(mp->m_quotainfo != NULL); | |
1960 | ASSERT(xfs_Gqm != NULL); | |
1961 | xfs_qm_destroy_quotainfo(mp); | |
4cd4a034 | 1962 | (void)xfs_mount_reset_sbqflags(mp); |
1da177e4 LT |
1963 | } else { |
1964 | cmn_err(CE_NOTE, "XFS quotacheck %s: Done.", mp->m_fsname); | |
1965 | } | |
1966 | return (error); | |
1967 | } | |
1968 | ||
1969 | /* | |
1970 | * This is called after the superblock has been read in and we're ready to | |
1971 | * iget the quota inodes. | |
1972 | */ | |
1973 | STATIC int | |
1974 | xfs_qm_init_quotainos( | |
1975 | xfs_mount_t *mp) | |
1976 | { | |
1977 | xfs_inode_t *uip, *gip; | |
1978 | int error; | |
1979 | __int64_t sbflags; | |
1980 | uint flags; | |
1981 | ||
1982 | ASSERT(mp->m_quotainfo); | |
1983 | uip = gip = NULL; | |
1984 | sbflags = 0; | |
1985 | flags = 0; | |
1986 | ||
1987 | /* | |
1988 | * Get the uquota and gquota inodes | |
1989 | */ | |
1990 | if (XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) { | |
1991 | if (XFS_IS_UQUOTA_ON(mp) && | |
1992 | mp->m_sb.sb_uquotino != NULLFSINO) { | |
1993 | ASSERT(mp->m_sb.sb_uquotino > 0); | |
1994 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, | |
1995 | 0, 0, &uip, 0))) | |
1996 | return XFS_ERROR(error); | |
1997 | } | |
c8ad20ff | 1998 | if (XFS_IS_OQUOTA_ON(mp) && |
1da177e4 LT |
1999 | mp->m_sb.sb_gquotino != NULLFSINO) { |
2000 | ASSERT(mp->m_sb.sb_gquotino > 0); | |
2001 | if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, | |
2002 | 0, 0, &gip, 0))) { | |
2003 | if (uip) | |
2004 | VN_RELE(XFS_ITOV(uip)); | |
2005 | return XFS_ERROR(error); | |
2006 | } | |
2007 | } | |
2008 | } else { | |
2009 | flags |= XFS_QMOPT_SBVERSION; | |
2010 | sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | | |
2011 | XFS_SB_GQUOTINO | XFS_SB_QFLAGS); | |
2012 | } | |
2013 | ||
2014 | /* | |
2015 | * Create the two inodes, if they don't exist already. The changes | |
2016 | * made above will get added to a transaction and logged in one of | |
2017 | * the qino_alloc calls below. If the device is readonly, | |
2018 | * temporarily switch to read-write to do this. | |
2019 | */ | |
2020 | if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) { | |
2021 | if ((error = xfs_qm_qino_alloc(mp, &uip, | |
2022 | sbflags | XFS_SB_UQUOTINO, | |
2023 | flags | XFS_QMOPT_UQUOTA))) | |
2024 | return XFS_ERROR(error); | |
2025 | ||
2026 | flags &= ~XFS_QMOPT_SBVERSION; | |
2027 | } | |
c8ad20ff NS |
2028 | if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) { |
2029 | flags |= (XFS_IS_GQUOTA_ON(mp) ? | |
2030 | XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA); | |
2031 | error = xfs_qm_qino_alloc(mp, &gip, | |
2032 | sbflags | XFS_SB_GQUOTINO, flags); | |
2033 | if (error) { | |
1da177e4 LT |
2034 | if (uip) |
2035 | VN_RELE(XFS_ITOV(uip)); | |
2036 | ||
2037 | return XFS_ERROR(error); | |
2038 | } | |
2039 | } | |
2040 | ||
2041 | XFS_QI_UQIP(mp) = uip; | |
2042 | XFS_QI_GQIP(mp) = gip; | |
2043 | ||
014c2544 | 2044 | return 0; |
1da177e4 LT |
2045 | } |
2046 | ||
2047 | ||
2048 | /* | |
2049 | * Traverse the freelist of dquots and attempt to reclaim a maximum of | |
2050 | * 'howmany' dquots. This operation races with dqlookup(), and attempts to | |
2051 | * favor the lookup function ... | |
2052 | * XXXsup merge this with qm_reclaim_one(). | |
2053 | */ | |
2054 | STATIC int | |
2055 | xfs_qm_shake_freelist( | |
2056 | int howmany) | |
2057 | { | |
2058 | int nreclaimed; | |
2059 | xfs_dqhash_t *hash; | |
2060 | xfs_dquot_t *dqp, *nextdqp; | |
2061 | int restarts; | |
2062 | int nflushes; | |
2063 | ||
2064 | if (howmany <= 0) | |
014c2544 | 2065 | return 0; |
1da177e4 LT |
2066 | |
2067 | nreclaimed = 0; | |
2068 | restarts = 0; | |
2069 | nflushes = 0; | |
2070 | ||
2071 | #ifdef QUOTADEBUG | |
2072 | cmn_err(CE_DEBUG, "Shake free 0x%x", howmany); | |
2073 | #endif | |
2074 | /* lock order is : hashchainlock, freelistlock, mplistlock */ | |
2075 | tryagain: | |
2076 | xfs_qm_freelist_lock(xfs_Gqm); | |
2077 | ||
2078 | for (dqp = xfs_Gqm->qm_dqfreelist.qh_next; | |
2079 | ((dqp != (xfs_dquot_t *) &xfs_Gqm->qm_dqfreelist) && | |
2080 | nreclaimed < howmany); ) { | |
2081 | xfs_dqlock(dqp); | |
2082 | ||
2083 | /* | |
2084 | * We are racing with dqlookup here. Naturally we don't | |
2085 | * want to reclaim a dquot that lookup wants. | |
2086 | */ | |
2087 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
2088 | xfs_dqunlock(dqp); | |
2089 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2090 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 2091 | return nreclaimed; |
1da177e4 LT |
2092 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); |
2093 | goto tryagain; | |
2094 | } | |
2095 | ||
2096 | /* | |
2097 | * If the dquot is inactive, we are assured that it is | |
2098 | * not on the mplist or the hashlist, and that makes our | |
2099 | * life easier. | |
2100 | */ | |
2101 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
2102 | ASSERT(dqp->q_mount == NULL); | |
2103 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
2104 | ASSERT(dqp->HL_PREVP == NULL); | |
2105 | ASSERT(dqp->MPL_PREVP == NULL); | |
2106 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); | |
2107 | nextdqp = dqp->dq_flnext; | |
2108 | goto off_freelist; | |
2109 | } | |
2110 | ||
2111 | ASSERT(dqp->MPL_PREVP); | |
2112 | /* | |
2113 | * Try to grab the flush lock. If this dquot is in the process of | |
2114 | * getting flushed to disk, we don't want to reclaim it. | |
2115 | */ | |
2116 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
2117 | xfs_dqunlock(dqp); | |
2118 | dqp = dqp->dq_flnext; | |
2119 | continue; | |
2120 | } | |
2121 | ||
2122 | /* | |
2123 | * We have the flush lock so we know that this is not in the | |
2124 | * process of being flushed. So, if this is dirty, flush it | |
2125 | * DELWRI so that we don't get a freelist infested with | |
2126 | * dirty dquots. | |
2127 | */ | |
2128 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
2129 | xfs_dqtrace_entry(dqp, "DQSHAKE: DQDIRTY"); | |
2130 | /* | |
2131 | * We flush it delayed write, so don't bother | |
2132 | * releasing the mplock. | |
2133 | */ | |
2134 | (void) xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); | |
2135 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ | |
2136 | dqp = dqp->dq_flnext; | |
2137 | continue; | |
2138 | } | |
2139 | /* | |
2140 | * We're trying to get the hashlock out of order. This races | |
2141 | * with dqlookup; so, we giveup and goto the next dquot if | |
2142 | * we couldn't get the hashlock. This way, we won't starve | |
2143 | * a dqlookup process that holds the hashlock that is | |
2144 | * waiting for the freelist lock. | |
2145 | */ | |
2146 | if (! xfs_qm_dqhashlock_nowait(dqp)) { | |
2147 | xfs_dqfunlock(dqp); | |
2148 | xfs_dqunlock(dqp); | |
2149 | dqp = dqp->dq_flnext; | |
2150 | continue; | |
2151 | } | |
2152 | /* | |
2153 | * This races with dquot allocation code as well as dqflush_all | |
2154 | * and reclaim code. So, if we failed to grab the mplist lock, | |
2155 | * giveup everything and start over. | |
2156 | */ | |
2157 | hash = dqp->q_hash; | |
2158 | ASSERT(hash); | |
2159 | if (! xfs_qm_mplist_nowait(dqp->q_mount)) { | |
2160 | /* XXX put a sentinel so that we can come back here */ | |
2161 | xfs_dqfunlock(dqp); | |
2162 | xfs_dqunlock(dqp); | |
2163 | XFS_DQ_HASH_UNLOCK(hash); | |
2164 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2165 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 2166 | return nreclaimed; |
1da177e4 LT |
2167 | goto tryagain; |
2168 | } | |
2169 | xfs_dqtrace_entry(dqp, "DQSHAKE: UNLINKING"); | |
2170 | #ifdef QUOTADEBUG | |
2171 | cmn_err(CE_DEBUG, "Shake 0x%p, ID 0x%x\n", | |
1149d96a | 2172 | dqp, be32_to_cpu(dqp->q_core.d_id)); |
1da177e4 LT |
2173 | #endif |
2174 | ASSERT(dqp->q_nrefs == 0); | |
2175 | nextdqp = dqp->dq_flnext; | |
2176 | XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp); | |
2177 | XQM_HASHLIST_REMOVE(hash, dqp); | |
2178 | xfs_dqfunlock(dqp); | |
2179 | xfs_qm_mplist_unlock(dqp->q_mount); | |
2180 | XFS_DQ_HASH_UNLOCK(hash); | |
2181 | ||
2182 | off_freelist: | |
2183 | XQM_FREELIST_REMOVE(dqp); | |
2184 | xfs_dqunlock(dqp); | |
2185 | nreclaimed++; | |
2186 | XQM_STATS_INC(xqmstats.xs_qm_dqshake_reclaims); | |
2187 | xfs_qm_dqdestroy(dqp); | |
2188 | dqp = nextdqp; | |
2189 | } | |
2190 | xfs_qm_freelist_unlock(xfs_Gqm); | |
014c2544 | 2191 | return nreclaimed; |
1da177e4 LT |
2192 | } |
2193 | ||
2194 | ||
2195 | /* | |
2196 | * The kmem_shake interface is invoked when memory is running low. | |
2197 | */ | |
2198 | /* ARGSUSED */ | |
2199 | STATIC int | |
51bfb75b | 2200 | xfs_qm_shake(int nr_to_scan, gfp_t gfp_mask) |
1da177e4 LT |
2201 | { |
2202 | int ndqused, nfree, n; | |
2203 | ||
2204 | if (!kmem_shake_allow(gfp_mask)) | |
014c2544 | 2205 | return 0; |
1da177e4 | 2206 | if (!xfs_Gqm) |
014c2544 | 2207 | return 0; |
1da177e4 LT |
2208 | |
2209 | nfree = xfs_Gqm->qm_dqfreelist.qh_nelems; /* free dquots */ | |
2210 | /* incore dquots in all f/s's */ | |
2211 | ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree; | |
2212 | ||
2213 | ASSERT(ndqused >= 0); | |
2214 | ||
2215 | if (nfree <= ndqused && nfree < ndquot) | |
014c2544 | 2216 | return 0; |
1da177e4 LT |
2217 | |
2218 | ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */ | |
2219 | n = nfree - ndqused - ndquot; /* # over target */ | |
2220 | ||
2221 | return xfs_qm_shake_freelist(MAX(nfree, n)); | |
2222 | } | |
2223 | ||
2224 | ||
2225 | /* | |
2226 | * Just pop the least recently used dquot off the freelist and | |
2227 | * recycle it. The returned dquot is locked. | |
2228 | */ | |
2229 | STATIC xfs_dquot_t * | |
2230 | xfs_qm_dqreclaim_one(void) | |
2231 | { | |
2232 | xfs_dquot_t *dqpout; | |
2233 | xfs_dquot_t *dqp; | |
2234 | int restarts; | |
2235 | int nflushes; | |
2236 | ||
2237 | restarts = 0; | |
2238 | dqpout = NULL; | |
2239 | nflushes = 0; | |
2240 | ||
2241 | /* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */ | |
2242 | startagain: | |
2243 | xfs_qm_freelist_lock(xfs_Gqm); | |
2244 | ||
2245 | FOREACH_DQUOT_IN_FREELIST(dqp, &(xfs_Gqm->qm_dqfreelist)) { | |
2246 | xfs_dqlock(dqp); | |
2247 | ||
2248 | /* | |
2249 | * We are racing with dqlookup here. Naturally we don't | |
2250 | * want to reclaim a dquot that lookup wants. We release the | |
2251 | * freelist lock and start over, so that lookup will grab | |
2252 | * both the dquot and the freelistlock. | |
2253 | */ | |
2254 | if (dqp->dq_flags & XFS_DQ_WANT) { | |
2255 | ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE)); | |
2256 | xfs_dqtrace_entry(dqp, "DQRECLAIM: DQWANT"); | |
2257 | xfs_dqunlock(dqp); | |
2258 | xfs_qm_freelist_unlock(xfs_Gqm); | |
2259 | if (++restarts >= XFS_QM_RECLAIM_MAX_RESTARTS) | |
014c2544 | 2260 | return NULL; |
1da177e4 LT |
2261 | XQM_STATS_INC(xqmstats.xs_qm_dqwants); |
2262 | goto startagain; | |
2263 | } | |
2264 | ||
2265 | /* | |
2266 | * If the dquot is inactive, we are assured that it is | |
2267 | * not on the mplist or the hashlist, and that makes our | |
2268 | * life easier. | |
2269 | */ | |
2270 | if (dqp->dq_flags & XFS_DQ_INACTIVE) { | |
2271 | ASSERT(dqp->q_mount == NULL); | |
2272 | ASSERT(! XFS_DQ_IS_DIRTY(dqp)); | |
2273 | ASSERT(dqp->HL_PREVP == NULL); | |
2274 | ASSERT(dqp->MPL_PREVP == NULL); | |
2275 | XQM_FREELIST_REMOVE(dqp); | |
2276 | xfs_dqunlock(dqp); | |
2277 | dqpout = dqp; | |
2278 | XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims); | |
2279 | break; | |
2280 | } | |
2281 | ||
2282 | ASSERT(dqp->q_hash); | |
2283 | ASSERT(dqp->MPL_PREVP); | |
2284 | ||
2285 | /* | |
2286 | * Try to grab the flush lock. If this dquot is in the process of | |
2287 | * getting flushed to disk, we don't want to reclaim it. | |
2288 | */ | |
2289 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
2290 | xfs_dqunlock(dqp); | |
2291 | continue; | |
2292 | } | |
2293 | ||
2294 | /* | |
2295 | * We have the flush lock so we know that this is not in the | |
2296 | * process of being flushed. So, if this is dirty, flush it | |
2297 | * DELWRI so that we don't get a freelist infested with | |
2298 | * dirty dquots. | |
2299 | */ | |
2300 | if (XFS_DQ_IS_DIRTY(dqp)) { | |
2301 | xfs_dqtrace_entry(dqp, "DQRECLAIM: DQDIRTY"); | |
2302 | /* | |
2303 | * We flush it delayed write, so don't bother | |
2304 | * releasing the freelist lock. | |
2305 | */ | |
2306 | (void) xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); | |
2307 | xfs_dqunlock(dqp); /* dqflush unlocks dqflock */ | |
2308 | continue; | |
2309 | } | |
2310 | ||
2311 | if (! xfs_qm_mplist_nowait(dqp->q_mount)) { | |
2312 | xfs_dqfunlock(dqp); | |
2313 | xfs_dqunlock(dqp); | |
2314 | continue; | |
2315 | } | |
2316 | ||
2317 | if (! xfs_qm_dqhashlock_nowait(dqp)) | |
2318 | goto mplistunlock; | |
2319 | ||
2320 | ASSERT(dqp->q_nrefs == 0); | |
2321 | xfs_dqtrace_entry(dqp, "DQRECLAIM: UNLINKING"); | |
2322 | XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(dqp->q_mount)), dqp); | |
2323 | XQM_HASHLIST_REMOVE(dqp->q_hash, dqp); | |
2324 | XQM_FREELIST_REMOVE(dqp); | |
2325 | dqpout = dqp; | |
2326 | XFS_DQ_HASH_UNLOCK(dqp->q_hash); | |
2327 | mplistunlock: | |
2328 | xfs_qm_mplist_unlock(dqp->q_mount); | |
2329 | xfs_dqfunlock(dqp); | |
2330 | xfs_dqunlock(dqp); | |
2331 | if (dqpout) | |
2332 | break; | |
2333 | } | |
2334 | ||
2335 | xfs_qm_freelist_unlock(xfs_Gqm); | |
014c2544 | 2336 | return dqpout; |
1da177e4 LT |
2337 | } |
2338 | ||
2339 | ||
2340 | /*------------------------------------------------------------------*/ | |
2341 | ||
2342 | /* | |
2343 | * Return a new incore dquot. Depending on the number of | |
2344 | * dquots in the system, we either allocate a new one on the kernel heap, | |
2345 | * or reclaim a free one. | |
2346 | * Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed | |
2347 | * to reclaim an existing one from the freelist. | |
2348 | */ | |
2349 | boolean_t | |
2350 | xfs_qm_dqalloc_incore( | |
2351 | xfs_dquot_t **O_dqpp) | |
2352 | { | |
2353 | xfs_dquot_t *dqp; | |
2354 | ||
2355 | /* | |
2356 | * Check against high water mark to see if we want to pop | |
2357 | * a nincompoop dquot off the freelist. | |
2358 | */ | |
2359 | if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) { | |
2360 | /* | |
2361 | * Try to recycle a dquot from the freelist. | |
2362 | */ | |
2363 | if ((dqp = xfs_qm_dqreclaim_one())) { | |
2364 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaims); | |
2365 | /* | |
2366 | * Just zero the core here. The rest will get | |
2367 | * reinitialized by caller. XXX we shouldn't even | |
2368 | * do this zero ... | |
2369 | */ | |
2370 | memset(&dqp->q_core, 0, sizeof(dqp->q_core)); | |
2371 | *O_dqpp = dqp; | |
014c2544 | 2372 | return B_FALSE; |
1da177e4 LT |
2373 | } |
2374 | XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses); | |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * Allocate a brand new dquot on the kernel heap and return it | |
2379 | * to the caller to initialize. | |
2380 | */ | |
2381 | ASSERT(xfs_Gqm->qm_dqzone != NULL); | |
2382 | *O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP); | |
2383 | atomic_inc(&xfs_Gqm->qm_totaldquots); | |
2384 | ||
014c2544 | 2385 | return B_TRUE; |
1da177e4 LT |
2386 | } |
2387 | ||
2388 | ||
2389 | /* | |
2390 | * Start a transaction and write the incore superblock changes to | |
2391 | * disk. flags parameter indicates which fields have changed. | |
2392 | */ | |
2393 | int | |
2394 | xfs_qm_write_sb_changes( | |
2395 | xfs_mount_t *mp, | |
2396 | __int64_t flags) | |
2397 | { | |
2398 | xfs_trans_t *tp; | |
2399 | int error; | |
2400 | ||
2401 | #ifdef QUOTADEBUG | |
2402 | cmn_err(CE_NOTE, "Writing superblock quota changes :%s", mp->m_fsname); | |
2403 | #endif | |
2404 | tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE); | |
2405 | if ((error = xfs_trans_reserve(tp, 0, | |
2406 | mp->m_sb.sb_sectsize + 128, 0, | |
2407 | 0, | |
2408 | XFS_DEFAULT_LOG_COUNT))) { | |
2409 | xfs_trans_cancel(tp, 0); | |
014c2544 | 2410 | return error; |
1da177e4 LT |
2411 | } |
2412 | ||
2413 | xfs_mod_sb(tp, flags); | |
2414 | (void) xfs_trans_commit(tp, 0, NULL); | |
2415 | ||
014c2544 | 2416 | return 0; |
1da177e4 LT |
2417 | } |
2418 | ||
2419 | ||
2420 | /* --------------- utility functions for vnodeops ---------------- */ | |
2421 | ||
2422 | ||
2423 | /* | |
2424 | * Given an inode, a uid and gid (from cred_t) make sure that we have | |
2425 | * allocated relevant dquot(s) on disk, and that we won't exceed inode | |
2426 | * quotas by creating this file. | |
2427 | * This also attaches dquot(s) to the given inode after locking it, | |
2428 | * and returns the dquots corresponding to the uid and/or gid. | |
2429 | * | |
2430 | * in : inode (unlocked) | |
2431 | * out : udquot, gdquot with references taken and unlocked | |
2432 | */ | |
2433 | int | |
2434 | xfs_qm_vop_dqalloc( | |
2435 | xfs_mount_t *mp, | |
2436 | xfs_inode_t *ip, | |
2437 | uid_t uid, | |
2438 | gid_t gid, | |
c8ad20ff | 2439 | prid_t prid, |
1da177e4 LT |
2440 | uint flags, |
2441 | xfs_dquot_t **O_udqpp, | |
2442 | xfs_dquot_t **O_gdqpp) | |
2443 | { | |
2444 | int error; | |
2445 | xfs_dquot_t *uq, *gq; | |
2446 | uint lockflags; | |
2447 | ||
2448 | if (!XFS_IS_QUOTA_ON(mp)) | |
2449 | return 0; | |
2450 | ||
2451 | lockflags = XFS_ILOCK_EXCL; | |
2452 | xfs_ilock(ip, lockflags); | |
2453 | ||
2454 | if ((flags & XFS_QMOPT_INHERIT) && | |
2455 | XFS_INHERIT_GID(ip, XFS_MTOVFS(mp))) | |
2456 | gid = ip->i_d.di_gid; | |
2457 | ||
2458 | /* | |
2459 | * Attach the dquot(s) to this inode, doing a dquot allocation | |
2460 | * if necessary. The dquot(s) will not be locked. | |
2461 | */ | |
2462 | if (XFS_NOT_DQATTACHED(mp, ip)) { | |
2463 | if ((error = xfs_qm_dqattach(ip, XFS_QMOPT_DQALLOC | | |
2464 | XFS_QMOPT_ILOCKED))) { | |
2465 | xfs_iunlock(ip, lockflags); | |
014c2544 | 2466 | return error; |
1da177e4 LT |
2467 | } |
2468 | } | |
2469 | ||
2470 | uq = gq = NULL; | |
c8ad20ff | 2471 | if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) { |
1da177e4 LT |
2472 | if (ip->i_d.di_uid != uid) { |
2473 | /* | |
2474 | * What we need is the dquot that has this uid, and | |
2475 | * if we send the inode to dqget, the uid of the inode | |
2476 | * takes priority over what's sent in the uid argument. | |
2477 | * We must unlock inode here before calling dqget if | |
2478 | * we're not sending the inode, because otherwise | |
2479 | * we'll deadlock by doing trans_reserve while | |
2480 | * holding ilock. | |
2481 | */ | |
2482 | xfs_iunlock(ip, lockflags); | |
2483 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid, | |
2484 | XFS_DQ_USER, | |
2485 | XFS_QMOPT_DQALLOC | | |
2486 | XFS_QMOPT_DOWARN, | |
2487 | &uq))) { | |
2488 | ASSERT(error != ENOENT); | |
014c2544 | 2489 | return error; |
1da177e4 LT |
2490 | } |
2491 | /* | |
2492 | * Get the ilock in the right order. | |
2493 | */ | |
2494 | xfs_dqunlock(uq); | |
2495 | lockflags = XFS_ILOCK_SHARED; | |
2496 | xfs_ilock(ip, lockflags); | |
2497 | } else { | |
2498 | /* | |
2499 | * Take an extra reference, because we'll return | |
2500 | * this to caller | |
2501 | */ | |
2502 | ASSERT(ip->i_udquot); | |
2503 | uq = ip->i_udquot; | |
2504 | xfs_dqlock(uq); | |
2505 | XFS_DQHOLD(uq); | |
2506 | xfs_dqunlock(uq); | |
2507 | } | |
2508 | } | |
c8ad20ff | 2509 | if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) { |
1da177e4 LT |
2510 | if (ip->i_d.di_gid != gid) { |
2511 | xfs_iunlock(ip, lockflags); | |
2512 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid, | |
2513 | XFS_DQ_GROUP, | |
2514 | XFS_QMOPT_DQALLOC | | |
2515 | XFS_QMOPT_DOWARN, | |
2516 | &gq))) { | |
2517 | if (uq) | |
2518 | xfs_qm_dqrele(uq); | |
2519 | ASSERT(error != ENOENT); | |
014c2544 | 2520 | return error; |
1da177e4 LT |
2521 | } |
2522 | xfs_dqunlock(gq); | |
2523 | lockflags = XFS_ILOCK_SHARED; | |
2524 | xfs_ilock(ip, lockflags); | |
2525 | } else { | |
2526 | ASSERT(ip->i_gdquot); | |
2527 | gq = ip->i_gdquot; | |
2528 | xfs_dqlock(gq); | |
2529 | XFS_DQHOLD(gq); | |
2530 | xfs_dqunlock(gq); | |
2531 | } | |
c8ad20ff NS |
2532 | } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) { |
2533 | if (ip->i_d.di_projid != prid) { | |
2534 | xfs_iunlock(ip, lockflags); | |
2535 | if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid, | |
2536 | XFS_DQ_PROJ, | |
2537 | XFS_QMOPT_DQALLOC | | |
2538 | XFS_QMOPT_DOWARN, | |
2539 | &gq))) { | |
2540 | if (uq) | |
2541 | xfs_qm_dqrele(uq); | |
2542 | ASSERT(error != ENOENT); | |
2543 | return (error); | |
2544 | } | |
2545 | xfs_dqunlock(gq); | |
2546 | lockflags = XFS_ILOCK_SHARED; | |
2547 | xfs_ilock(ip, lockflags); | |
2548 | } else { | |
2549 | ASSERT(ip->i_gdquot); | |
2550 | gq = ip->i_gdquot; | |
2551 | xfs_dqlock(gq); | |
2552 | XFS_DQHOLD(gq); | |
2553 | xfs_dqunlock(gq); | |
2554 | } | |
1da177e4 LT |
2555 | } |
2556 | if (uq) | |
2557 | xfs_dqtrace_entry_ino(uq, "DQALLOC", ip); | |
2558 | ||
2559 | xfs_iunlock(ip, lockflags); | |
2560 | if (O_udqpp) | |
2561 | *O_udqpp = uq; | |
2562 | else if (uq) | |
2563 | xfs_qm_dqrele(uq); | |
2564 | if (O_gdqpp) | |
2565 | *O_gdqpp = gq; | |
2566 | else if (gq) | |
2567 | xfs_qm_dqrele(gq); | |
014c2544 | 2568 | return 0; |
1da177e4 LT |
2569 | } |
2570 | ||
2571 | /* | |
2572 | * Actually transfer ownership, and do dquot modifications. | |
2573 | * These were already reserved. | |
2574 | */ | |
2575 | xfs_dquot_t * | |
2576 | xfs_qm_vop_chown( | |
2577 | xfs_trans_t *tp, | |
2578 | xfs_inode_t *ip, | |
2579 | xfs_dquot_t **IO_olddq, | |
2580 | xfs_dquot_t *newdq) | |
2581 | { | |
2582 | xfs_dquot_t *prevdq; | |
06d10dd9 NS |
2583 | uint bfield = XFS_IS_REALTIME_INODE(ip) ? |
2584 | XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT; | |
2585 | ||
1da177e4 LT |
2586 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); |
2587 | ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount)); | |
2588 | ||
2589 | /* old dquot */ | |
2590 | prevdq = *IO_olddq; | |
2591 | ASSERT(prevdq); | |
2592 | ASSERT(prevdq != newdq); | |
2593 | ||
06d10dd9 NS |
2594 | xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks)); |
2595 | xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1); | |
1da177e4 LT |
2596 | |
2597 | /* the sparkling new dquot */ | |
06d10dd9 NS |
2598 | xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks); |
2599 | xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1); | |
1da177e4 LT |
2600 | |
2601 | /* | |
2602 | * Take an extra reference, because the inode | |
2603 | * is going to keep this dquot pointer even | |
2604 | * after the trans_commit. | |
2605 | */ | |
2606 | xfs_dqlock(newdq); | |
2607 | XFS_DQHOLD(newdq); | |
2608 | xfs_dqunlock(newdq); | |
2609 | *IO_olddq = newdq; | |
2610 | ||
014c2544 | 2611 | return prevdq; |
1da177e4 LT |
2612 | } |
2613 | ||
2614 | /* | |
c8ad20ff | 2615 | * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID). |
1da177e4 LT |
2616 | */ |
2617 | int | |
2618 | xfs_qm_vop_chown_reserve( | |
2619 | xfs_trans_t *tp, | |
2620 | xfs_inode_t *ip, | |
2621 | xfs_dquot_t *udqp, | |
2622 | xfs_dquot_t *gdqp, | |
2623 | uint flags) | |
2624 | { | |
2625 | int error; | |
2626 | xfs_mount_t *mp; | |
06d10dd9 | 2627 | uint delblks, blkflags; |
1da177e4 LT |
2628 | xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq; |
2629 | ||
2630 | ASSERT(XFS_ISLOCKED_INODE(ip)); | |
2631 | mp = ip->i_mount; | |
2632 | ASSERT(XFS_IS_QUOTA_RUNNING(mp)); | |
2633 | ||
2634 | delblks = ip->i_delayed_blks; | |
2635 | delblksudq = delblksgdq = unresudq = unresgdq = NULL; | |
06d10dd9 NS |
2636 | blkflags = XFS_IS_REALTIME_INODE(ip) ? |
2637 | XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS; | |
1da177e4 LT |
2638 | |
2639 | if (XFS_IS_UQUOTA_ON(mp) && udqp && | |
1149d96a | 2640 | ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) { |
1da177e4 LT |
2641 | delblksudq = udqp; |
2642 | /* | |
2643 | * If there are delayed allocation blocks, then we have to | |
2644 | * unreserve those from the old dquot, and add them to the | |
2645 | * new dquot. | |
2646 | */ | |
2647 | if (delblks) { | |
2648 | ASSERT(ip->i_udquot); | |
2649 | unresudq = ip->i_udquot; | |
2650 | } | |
2651 | } | |
c8ad20ff | 2652 | if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) { |
1149d96a CH |
2653 | if ((XFS_IS_GQUOTA_ON(ip->i_mount) && |
2654 | ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) || | |
2655 | (XFS_IS_PQUOTA_ON(ip->i_mount) && | |
2656 | ip->i_d.di_projid != be32_to_cpu(gdqp->q_core.d_id))) { | |
c8ad20ff NS |
2657 | delblksgdq = gdqp; |
2658 | if (delblks) { | |
2659 | ASSERT(ip->i_gdquot); | |
2660 | unresgdq = ip->i_gdquot; | |
2661 | } | |
1da177e4 LT |
2662 | } |
2663 | } | |
2664 | ||
2665 | if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount, | |
2666 | delblksudq, delblksgdq, ip->i_d.di_nblocks, 1, | |
06d10dd9 | 2667 | flags | blkflags))) |
1da177e4 LT |
2668 | return (error); |
2669 | ||
2670 | /* | |
2671 | * Do the delayed blks reservations/unreservations now. Since, these | |
2672 | * are done without the help of a transaction, if a reservation fails | |
2673 | * its previous reservations won't be automatically undone by trans | |
2674 | * code. So, we have to do it manually here. | |
2675 | */ | |
2676 | if (delblks) { | |
2677 | /* | |
2678 | * Do the reservations first. Unreservation can't fail. | |
2679 | */ | |
2680 | ASSERT(delblksudq || delblksgdq); | |
2681 | ASSERT(unresudq || unresgdq); | |
2682 | if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2683 | delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0, | |
06d10dd9 | 2684 | flags | blkflags))) |
1da177e4 LT |
2685 | return (error); |
2686 | xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, | |
2687 | unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0, | |
06d10dd9 | 2688 | blkflags); |
1da177e4 LT |
2689 | } |
2690 | ||
2691 | return (0); | |
2692 | } | |
2693 | ||
2694 | int | |
2695 | xfs_qm_vop_rename_dqattach( | |
2696 | xfs_inode_t **i_tab) | |
2697 | { | |
2698 | xfs_inode_t *ip; | |
2699 | int i; | |
2700 | int error; | |
2701 | ||
2702 | ip = i_tab[0]; | |
2703 | ||
2704 | if (! XFS_IS_QUOTA_ON(ip->i_mount)) | |
014c2544 | 2705 | return 0; |
1da177e4 LT |
2706 | |
2707 | if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) { | |
2708 | error = xfs_qm_dqattach(ip, 0); | |
2709 | if (error) | |
014c2544 | 2710 | return error; |
1da177e4 LT |
2711 | } |
2712 | for (i = 1; (i < 4 && i_tab[i]); i++) { | |
2713 | /* | |
2714 | * Watch out for duplicate entries in the table. | |
2715 | */ | |
2716 | if ((ip = i_tab[i]) != i_tab[i-1]) { | |
2717 | if (XFS_NOT_DQATTACHED(ip->i_mount, ip)) { | |
2718 | error = xfs_qm_dqattach(ip, 0); | |
2719 | if (error) | |
014c2544 | 2720 | return error; |
1da177e4 LT |
2721 | } |
2722 | } | |
2723 | } | |
014c2544 | 2724 | return 0; |
1da177e4 LT |
2725 | } |
2726 | ||
2727 | void | |
2728 | xfs_qm_vop_dqattach_and_dqmod_newinode( | |
2729 | xfs_trans_t *tp, | |
2730 | xfs_inode_t *ip, | |
2731 | xfs_dquot_t *udqp, | |
2732 | xfs_dquot_t *gdqp) | |
2733 | { | |
2734 | if (!XFS_IS_QUOTA_ON(tp->t_mountp)) | |
2735 | return; | |
2736 | ||
2737 | ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); | |
2738 | ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp)); | |
2739 | ||
2740 | if (udqp) { | |
2741 | xfs_dqlock(udqp); | |
2742 | XFS_DQHOLD(udqp); | |
2743 | xfs_dqunlock(udqp); | |
2744 | ASSERT(ip->i_udquot == NULL); | |
2745 | ip->i_udquot = udqp; | |
ee2a4f7c | 2746 | ASSERT(XFS_IS_UQUOTA_ON(tp->t_mountp)); |
1149d96a | 2747 | ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id)); |
1da177e4 LT |
2748 | xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1); |
2749 | } | |
2750 | if (gdqp) { | |
2751 | xfs_dqlock(gdqp); | |
2752 | XFS_DQHOLD(gdqp); | |
2753 | xfs_dqunlock(gdqp); | |
2754 | ASSERT(ip->i_gdquot == NULL); | |
2755 | ip->i_gdquot = gdqp; | |
ee2a4f7c NS |
2756 | ASSERT(XFS_IS_OQUOTA_ON(tp->t_mountp)); |
2757 | ASSERT((XFS_IS_GQUOTA_ON(tp->t_mountp) ? | |
2758 | ip->i_d.di_gid : ip->i_d.di_projid) == | |
2759 | be32_to_cpu(gdqp->q_core.d_id)); | |
1da177e4 LT |
2760 | xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1); |
2761 | } | |
2762 | } | |
2763 | ||
2764 | /* ------------- list stuff -----------------*/ | |
ba0f32d4 | 2765 | STATIC void |
1da177e4 LT |
2766 | xfs_qm_freelist_init(xfs_frlist_t *ql) |
2767 | { | |
2768 | ql->qh_next = ql->qh_prev = (xfs_dquot_t *) ql; | |
794ee1ba | 2769 | mutex_init(&ql->qh_lock); |
1da177e4 LT |
2770 | ql->qh_version = 0; |
2771 | ql->qh_nelems = 0; | |
2772 | } | |
2773 | ||
ba0f32d4 | 2774 | STATIC void |
1da177e4 LT |
2775 | xfs_qm_freelist_destroy(xfs_frlist_t *ql) |
2776 | { | |
2777 | xfs_dquot_t *dqp, *nextdqp; | |
2778 | ||
794ee1ba | 2779 | mutex_lock(&ql->qh_lock); |
1da177e4 LT |
2780 | for (dqp = ql->qh_next; |
2781 | dqp != (xfs_dquot_t *)ql; ) { | |
2782 | xfs_dqlock(dqp); | |
2783 | nextdqp = dqp->dq_flnext; | |
2784 | #ifdef QUOTADEBUG | |
2785 | cmn_err(CE_DEBUG, "FREELIST destroy 0x%p", dqp); | |
2786 | #endif | |
2787 | XQM_FREELIST_REMOVE(dqp); | |
2788 | xfs_dqunlock(dqp); | |
2789 | xfs_qm_dqdestroy(dqp); | |
2790 | dqp = nextdqp; | |
2791 | } | |
2792 | /* | |
2793 | * Don't bother about unlocking. | |
2794 | */ | |
2795 | mutex_destroy(&ql->qh_lock); | |
2796 | ||
2797 | ASSERT(ql->qh_nelems == 0); | |
2798 | } | |
2799 | ||
ba0f32d4 | 2800 | STATIC void |
1da177e4 LT |
2801 | xfs_qm_freelist_insert(xfs_frlist_t *ql, xfs_dquot_t *dq) |
2802 | { | |
2803 | dq->dq_flnext = ql->qh_next; | |
2804 | dq->dq_flprev = (xfs_dquot_t *)ql; | |
2805 | ql->qh_next = dq; | |
2806 | dq->dq_flnext->dq_flprev = dq; | |
2807 | xfs_Gqm->qm_dqfreelist.qh_nelems++; | |
2808 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2809 | } | |
2810 | ||
2811 | void | |
2812 | xfs_qm_freelist_unlink(xfs_dquot_t *dq) | |
2813 | { | |
2814 | xfs_dquot_t *next = dq->dq_flnext; | |
2815 | xfs_dquot_t *prev = dq->dq_flprev; | |
2816 | ||
2817 | next->dq_flprev = prev; | |
2818 | prev->dq_flnext = next; | |
2819 | dq->dq_flnext = dq->dq_flprev = dq; | |
2820 | xfs_Gqm->qm_dqfreelist.qh_nelems--; | |
2821 | xfs_Gqm->qm_dqfreelist.qh_version++; | |
2822 | } | |
2823 | ||
2824 | void | |
2825 | xfs_qm_freelist_append(xfs_frlist_t *ql, xfs_dquot_t *dq) | |
2826 | { | |
2827 | xfs_qm_freelist_insert((xfs_frlist_t *)ql->qh_prev, dq); | |
2828 | } | |
2829 | ||
ba0f32d4 | 2830 | STATIC int |
1da177e4 LT |
2831 | xfs_qm_dqhashlock_nowait( |
2832 | xfs_dquot_t *dqp) | |
2833 | { | |
2834 | int locked; | |
2835 | ||
2836 | locked = mutex_trylock(&((dqp)->q_hash->qh_lock)); | |
014c2544 | 2837 | return locked; |
1da177e4 LT |
2838 | } |
2839 | ||
2840 | int | |
2841 | xfs_qm_freelist_lock_nowait( | |
2842 | xfs_qm_t *xqm) | |
2843 | { | |
2844 | int locked; | |
2845 | ||
2846 | locked = mutex_trylock(&(xqm->qm_dqfreelist.qh_lock)); | |
014c2544 | 2847 | return locked; |
1da177e4 LT |
2848 | } |
2849 | ||
ba0f32d4 | 2850 | STATIC int |
1da177e4 LT |
2851 | xfs_qm_mplist_nowait( |
2852 | xfs_mount_t *mp) | |
2853 | { | |
2854 | int locked; | |
2855 | ||
2856 | ASSERT(mp->m_quotainfo); | |
2857 | locked = mutex_trylock(&(XFS_QI_MPLLOCK(mp))); | |
014c2544 | 2858 | return locked; |
1da177e4 | 2859 | } |