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1da177e4 1/*
4ce3121f
NS
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
1da177e4 4 *
4ce3121f
NS
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
1da177e4
LT
7 * published by the Free Software Foundation.
8 *
4ce3121f
NS
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
1da177e4 13 *
4ce3121f
NS
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4 17 */
1da177e4
LT
18#include "xfs.h"
19#include "xfs_fs.h"
a844f451 20#include "xfs_bit.h"
1da177e4 21#include "xfs_log.h"
1da177e4
LT
22#include "xfs_trans.h"
23#include "xfs_sb.h"
24#include "xfs_ag.h"
1da177e4 25#include "xfs_alloc.h"
1da177e4
LT
26#include "xfs_quota.h"
27#include "xfs_mount.h"
1da177e4
LT
28#include "xfs_bmap_btree.h"
29#include "xfs_ialloc_btree.h"
1da177e4
LT
30#include "xfs_dinode.h"
31#include "xfs_inode.h"
a844f451
NS
32#include "xfs_ialloc.h"
33#include "xfs_itable.h"
1da177e4
LT
34#include "xfs_rtalloc.h"
35#include "xfs_error.h"
a844f451 36#include "xfs_bmap.h"
1da177e4
LT
37#include "xfs_attr.h"
38#include "xfs_buf_item.h"
39#include "xfs_trans_space.h"
40#include "xfs_utils.h"
1da177e4 41#include "xfs_qm.h"
0b1b213f 42#include "xfs_trace.h"
33479e05 43#include "xfs_icache.h"
1da177e4
LT
44
45/*
46 * The global quota manager. There is only one of these for the entire
47 * system, _not_ one per file system. XQM keeps track of the overall
48 * quota functionality, including maintaining the freelist and hash
49 * tables of dquots.
50 */
1da177e4 51STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
ba0f32d4 52STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
1495f230 53STATIC int xfs_qm_shake(struct shrinker *, struct shrink_control *);
1da177e4 54
b84a3a96
CH
55/*
56 * We use the batch lookup interface to iterate over the dquots as it
57 * currently is the only interface into the radix tree code that allows
58 * fuzzy lookups instead of exact matches. Holding the lock over multiple
59 * operations is fine as all callers are used either during mount/umount
60 * or quotaoff.
61 */
62#define XFS_DQ_LOOKUP_BATCH 32
63
64STATIC int
65xfs_qm_dquot_walk(
66 struct xfs_mount *mp,
67 int type,
43ff2122
CH
68 int (*execute)(struct xfs_dquot *dqp, void *data),
69 void *data)
b84a3a96
CH
70{
71 struct xfs_quotainfo *qi = mp->m_quotainfo;
72 struct radix_tree_root *tree = XFS_DQUOT_TREE(qi, type);
73 uint32_t next_index;
74 int last_error = 0;
75 int skipped;
76 int nr_found;
77
78restart:
79 skipped = 0;
80 next_index = 0;
81 nr_found = 0;
82
83 while (1) {
84 struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
85 int error = 0;
86 int i;
87
88 mutex_lock(&qi->qi_tree_lock);
89 nr_found = radix_tree_gang_lookup(tree, (void **)batch,
90 next_index, XFS_DQ_LOOKUP_BATCH);
91 if (!nr_found) {
92 mutex_unlock(&qi->qi_tree_lock);
93 break;
94 }
95
96 for (i = 0; i < nr_found; i++) {
97 struct xfs_dquot *dqp = batch[i];
98
99 next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
100
43ff2122 101 error = execute(batch[i], data);
b84a3a96
CH
102 if (error == EAGAIN) {
103 skipped++;
104 continue;
105 }
106 if (error && last_error != EFSCORRUPTED)
107 last_error = error;
108 }
109
110 mutex_unlock(&qi->qi_tree_lock);
111
112 /* bail out if the filesystem is corrupted. */
113 if (last_error == EFSCORRUPTED) {
114 skipped = 0;
115 break;
116 }
117 }
118
119 if (skipped) {
120 delay(1);
121 goto restart;
122 }
123
124 return last_error;
125}
126
127
128/*
129 * Purge a dquot from all tracking data structures and free it.
130 */
131STATIC int
132xfs_qm_dqpurge(
43ff2122
CH
133 struct xfs_dquot *dqp,
134 void *data)
b84a3a96
CH
135{
136 struct xfs_mount *mp = dqp->q_mount;
137 struct xfs_quotainfo *qi = mp->m_quotainfo;
138 struct xfs_dquot *gdqp = NULL;
139
140 xfs_dqlock(dqp);
141 if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
142 xfs_dqunlock(dqp);
143 return EAGAIN;
144 }
145
146 /*
147 * If this quota has a group hint attached, prepare for releasing it
148 * now.
149 */
150 gdqp = dqp->q_gdquot;
151 if (gdqp) {
152 xfs_dqlock(gdqp);
153 dqp->q_gdquot = NULL;
154 }
155
156 dqp->dq_flags |= XFS_DQ_FREEING;
157
43ff2122 158 xfs_dqflock(dqp);
b84a3a96
CH
159
160 /*
161 * If we are turning this type of quotas off, we don't care
162 * about the dirty metadata sitting in this dquot. OTOH, if
163 * we're unmounting, we do care, so we flush it and wait.
164 */
165 if (XFS_DQ_IS_DIRTY(dqp)) {
fe7257fd
CH
166 struct xfs_buf *bp = NULL;
167 int error;
b84a3a96
CH
168
169 /*
170 * We don't care about getting disk errors here. We need
171 * to purge this dquot anyway, so we go ahead regardless.
172 */
fe7257fd
CH
173 error = xfs_qm_dqflush(dqp, &bp);
174 if (error) {
b84a3a96
CH
175 xfs_warn(mp, "%s: dquot %p flush failed",
176 __func__, dqp);
fe7257fd
CH
177 } else {
178 error = xfs_bwrite(bp);
179 xfs_buf_relse(bp);
180 }
b84a3a96
CH
181 xfs_dqflock(dqp);
182 }
183
184 ASSERT(atomic_read(&dqp->q_pincount) == 0);
185 ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
186 !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
187
188 xfs_dqfunlock(dqp);
189 xfs_dqunlock(dqp);
190
191 radix_tree_delete(XFS_DQUOT_TREE(qi, dqp->q_core.d_flags),
192 be32_to_cpu(dqp->q_core.d_id));
193 qi->qi_dquots--;
194
195 /*
196 * We move dquots to the freelist as soon as their reference count
197 * hits zero, so it really should be on the freelist here.
198 */
199 mutex_lock(&qi->qi_lru_lock);
200 ASSERT(!list_empty(&dqp->q_lru));
201 list_del_init(&dqp->q_lru);
202 qi->qi_lru_count--;
203 XFS_STATS_DEC(xs_qm_dquot_unused);
204 mutex_unlock(&qi->qi_lru_lock);
205
206 xfs_qm_dqdestroy(dqp);
207
208 if (gdqp)
209 xfs_qm_dqput(gdqp);
210 return 0;
211}
212
213/*
214 * Purge the dquot cache.
215 */
216void
217xfs_qm_dqpurge_all(
218 struct xfs_mount *mp,
219 uint flags)
220{
221 if (flags & XFS_QMOPT_UQUOTA)
43ff2122 222 xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
b84a3a96 223 if (flags & XFS_QMOPT_GQUOTA)
43ff2122 224 xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
b84a3a96 225 if (flags & XFS_QMOPT_PQUOTA)
43ff2122 226 xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
b84a3a96
CH
227}
228
1da177e4
LT
229/*
230 * Just destroy the quotainfo structure.
231 */
232void
7d095257
CH
233xfs_qm_unmount(
234 struct xfs_mount *mp)
1da177e4 235{
7d095257 236 if (mp->m_quotainfo) {
8112e9dc 237 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1da177e4 238 xfs_qm_destroy_quotainfo(mp);
7d095257 239 }
1da177e4
LT
240}
241
242
243/*
244 * This is called from xfs_mountfs to start quotas and initialize all
245 * necessary data structures like quotainfo. This is also responsible for
246 * running a quotacheck as necessary. We are guaranteed that the superblock
247 * is consistently read in at this point.
53aa7915
DC
248 *
249 * If we fail here, the mount will continue with quota turned off. We don't
250 * need to inidicate success or failure at all.
1da177e4 251 */
53aa7915 252void
1da177e4 253xfs_qm_mount_quotas(
4249023a 254 xfs_mount_t *mp)
1da177e4 255{
1da177e4
LT
256 int error = 0;
257 uint sbf;
258
1da177e4
LT
259 /*
260 * If quotas on realtime volumes is not supported, we disable
261 * quotas immediately.
262 */
263 if (mp->m_sb.sb_rextents) {
0b932ccc 264 xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
1da177e4
LT
265 mp->m_qflags = 0;
266 goto write_changes;
267 }
268
1da177e4 269 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
155ffd07 270
1da177e4
LT
271 /*
272 * Allocate the quotainfo structure inside the mount struct, and
273 * create quotainode(s), and change/rev superblock if necessary.
274 */
53aa7915
DC
275 error = xfs_qm_init_quotainfo(mp);
276 if (error) {
1da177e4
LT
277 /*
278 * We must turn off quotas.
279 */
280 ASSERT(mp->m_quotainfo == NULL);
281 mp->m_qflags = 0;
282 goto write_changes;
283 }
284 /*
285 * If any of the quotas are not consistent, do a quotacheck.
286 */
4249023a 287 if (XFS_QM_NEED_QUOTACHECK(mp)) {
53aa7915
DC
288 error = xfs_qm_quotacheck(mp);
289 if (error) {
290 /* Quotacheck failed and disabled quotas. */
291 return;
1da177e4 292 }
1da177e4 293 }
646d5bda
DD
294 /*
295 * If one type of quotas is off, then it will lose its
296 * quotachecked status, since we won't be doing accounting for
297 * that type anymore.
298 */
53aa7915 299 if (!XFS_IS_UQUOTA_ON(mp))
646d5bda 300 mp->m_qflags &= ~XFS_UQUOTA_CHKD;
53aa7915 301 if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
646d5bda 302 mp->m_qflags &= ~XFS_OQUOTA_CHKD;
155ffd07 303
1da177e4
LT
304 write_changes:
305 /*
3685c2a1 306 * We actually don't have to acquire the m_sb_lock at all.
1da177e4
LT
307 * This can only be called from mount, and that's single threaded. XXX
308 */
3685c2a1 309 spin_lock(&mp->m_sb_lock);
1da177e4
LT
310 sbf = mp->m_sb.sb_qflags;
311 mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
3685c2a1 312 spin_unlock(&mp->m_sb_lock);
1da177e4
LT
313
314 if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
315 if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
316 /*
317 * We could only have been turning quotas off.
318 * We aren't in very good shape actually because
319 * the incore structures are convinced that quotas are
320 * off, but the on disk superblock doesn't know that !
321 */
322 ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
53487786
DC
323 xfs_alert(mp, "%s: Superblock update failed!",
324 __func__);
1da177e4
LT
325 }
326 }
327
328 if (error) {
53487786 329 xfs_warn(mp, "Failed to initialize disk quotas.");
7d095257 330 return;
1da177e4 331 }
1da177e4
LT
332}
333
334/*
335 * Called from the vfsops layer.
336 */
e57481dc 337void
1da177e4
LT
338xfs_qm_unmount_quotas(
339 xfs_mount_t *mp)
340{
1da177e4
LT
341 /*
342 * Release the dquots that root inode, et al might be holding,
343 * before we flush quotas and blow away the quotainfo structure.
344 */
345 ASSERT(mp->m_rootip);
346 xfs_qm_dqdetach(mp->m_rootip);
347 if (mp->m_rbmip)
348 xfs_qm_dqdetach(mp->m_rbmip);
349 if (mp->m_rsumip)
350 xfs_qm_dqdetach(mp->m_rsumip);
351
352 /*
e57481dc 353 * Release the quota inodes.
1da177e4 354 */
1da177e4 355 if (mp->m_quotainfo) {
e57481dc
CH
356 if (mp->m_quotainfo->qi_uquotaip) {
357 IRELE(mp->m_quotainfo->qi_uquotaip);
358 mp->m_quotainfo->qi_uquotaip = NULL;
1da177e4 359 }
e57481dc
CH
360 if (mp->m_quotainfo->qi_gquotaip) {
361 IRELE(mp->m_quotainfo->qi_gquotaip);
362 mp->m_quotainfo->qi_gquotaip = NULL;
1da177e4
LT
363 }
364 }
1da177e4
LT
365}
366
1da177e4
LT
367STATIC int
368xfs_qm_dqattach_one(
369 xfs_inode_t *ip,
370 xfs_dqid_t id,
371 uint type,
372 uint doalloc,
1da177e4
LT
373 xfs_dquot_t *udqhint, /* hint */
374 xfs_dquot_t **IO_idqpp)
375{
376 xfs_dquot_t *dqp;
377 int error;
378
579aa9ca 379 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1da177e4 380 error = 0;
8e9b6e7f 381
1da177e4
LT
382 /*
383 * See if we already have it in the inode itself. IO_idqpp is
384 * &i_udquot or &i_gdquot. This made the code look weird, but
385 * made the logic a lot simpler.
386 */
8e9b6e7f
CH
387 dqp = *IO_idqpp;
388 if (dqp) {
0b1b213f 389 trace_xfs_dqattach_found(dqp);
8e9b6e7f 390 return 0;
1da177e4
LT
391 }
392
393 /*
394 * udqhint is the i_udquot field in inode, and is non-NULL only
c8ad20ff 395 * when the type arg is group/project. Its purpose is to save a
1da177e4
LT
396 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
397 * the user dquot.
398 */
8e9b6e7f
CH
399 if (udqhint) {
400 ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
1da177e4
LT
401 xfs_dqlock(udqhint);
402
8e9b6e7f
CH
403 /*
404 * No need to take dqlock to look at the id.
405 *
406 * The ID can't change until it gets reclaimed, and it won't
407 * be reclaimed as long as we have a ref from inode and we
408 * hold the ilock.
409 */
410 dqp = udqhint->q_gdquot;
411 if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
8e9b6e7f 412 ASSERT(*IO_idqpp == NULL);
8e9b6e7f 413
78e55892 414 *IO_idqpp = xfs_qm_dqhold(dqp);
1da177e4 415 xfs_dqunlock(udqhint);
8e9b6e7f 416 return 0;
1da177e4 417 }
8e9b6e7f
CH
418
419 /*
420 * We can't hold a dquot lock when we call the dqget code.
421 * We'll deadlock in no time, because of (not conforming to)
422 * lock ordering - the inodelock comes before any dquot lock,
423 * and we may drop and reacquire the ilock in xfs_qm_dqget().
424 */
1da177e4 425 xfs_dqunlock(udqhint);
8e9b6e7f
CH
426 }
427
1da177e4
LT
428 /*
429 * Find the dquot from somewhere. This bumps the
430 * reference count of dquot and returns it locked.
431 * This can return ENOENT if dquot didn't exist on
432 * disk and we didn't ask it to allocate;
433 * ESRCH if quotas got turned off suddenly.
434 */
db3e74b5
MH
435 error = xfs_qm_dqget(ip->i_mount, ip, id, type,
436 doalloc | XFS_QMOPT_DOWARN, &dqp);
8e9b6e7f
CH
437 if (error)
438 return error;
1da177e4 439
0b1b213f 440 trace_xfs_dqattach_get(dqp);
8e9b6e7f 441
1da177e4
LT
442 /*
443 * dqget may have dropped and re-acquired the ilock, but it guarantees
444 * that the dquot returned is the one that should go in the inode.
445 */
446 *IO_idqpp = dqp;
8e9b6e7f
CH
447 xfs_dqunlock(dqp);
448 return 0;
1da177e4
LT
449}
450
451
452/*
453 * Given a udquot and gdquot, attach a ptr to the group dquot in the
ab680bb7 454 * udquot as a hint for future lookups.
1da177e4
LT
455 */
456STATIC void
457xfs_qm_dqattach_grouphint(
458 xfs_dquot_t *udq,
8e9b6e7f 459 xfs_dquot_t *gdq)
1da177e4
LT
460{
461 xfs_dquot_t *tmp;
462
8e9b6e7f 463 xfs_dqlock(udq);
1da177e4 464
ab680bb7
CH
465 tmp = udq->q_gdquot;
466 if (tmp) {
467 if (tmp == gdq)
468 goto done;
1da177e4
LT
469
470 udq->q_gdquot = NULL;
1da177e4 471 xfs_qm_dqrele(tmp);
1da177e4 472 }
8e9b6e7f 473
78e55892 474 udq->q_gdquot = xfs_qm_dqhold(gdq);
ab680bb7 475done:
8e9b6e7f 476 xfs_dqunlock(udq);
1da177e4
LT
477}
478
b4d05e30
CH
479static bool
480xfs_qm_need_dqattach(
481 struct xfs_inode *ip)
482{
483 struct xfs_mount *mp = ip->i_mount;
484
485 if (!XFS_IS_QUOTA_RUNNING(mp))
486 return false;
487 if (!XFS_IS_QUOTA_ON(mp))
488 return false;
489 if (!XFS_NOT_DQATTACHED(mp, ip))
490 return false;
491 if (ip->i_ino == mp->m_sb.sb_uquotino ||
492 ip->i_ino == mp->m_sb.sb_gquotino)
493 return false;
494 return true;
495}
1da177e4
LT
496
497/*
c8ad20ff
NS
498 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
499 * into account.
1da177e4 500 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
1da177e4
LT
501 * Inode may get unlocked and relocked in here, and the caller must deal with
502 * the consequences.
503 */
504int
7d095257 505xfs_qm_dqattach_locked(
1da177e4
LT
506 xfs_inode_t *ip,
507 uint flags)
508{
509 xfs_mount_t *mp = ip->i_mount;
510 uint nquotas = 0;
511 int error = 0;
512
b4d05e30 513 if (!xfs_qm_need_dqattach(ip))
014c2544 514 return 0;
1da177e4 515
7d095257 516 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1da177e4
LT
517
518 if (XFS_IS_UQUOTA_ON(mp)) {
519 error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
520 flags & XFS_QMOPT_DQALLOC,
1da177e4
LT
521 NULL, &ip->i_udquot);
522 if (error)
523 goto done;
524 nquotas++;
525 }
579aa9ca
CH
526
527 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
c8ad20ff
NS
528 if (XFS_IS_OQUOTA_ON(mp)) {
529 error = XFS_IS_GQUOTA_ON(mp) ?
530 xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
531 flags & XFS_QMOPT_DQALLOC,
c8ad20ff 532 ip->i_udquot, &ip->i_gdquot) :
6743099c 533 xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
1da177e4 534 flags & XFS_QMOPT_DQALLOC,
1da177e4
LT
535 ip->i_udquot, &ip->i_gdquot);
536 /*
537 * Don't worry about the udquot that we may have
538 * attached above. It'll get detached, if not already.
539 */
540 if (error)
541 goto done;
542 nquotas++;
543 }
544
545 /*
546 * Attach this group quota to the user quota as a hint.
547 * This WON'T, in general, result in a thrash.
548 */
549 if (nquotas == 2) {
579aa9ca 550 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1da177e4
LT
551 ASSERT(ip->i_udquot);
552 ASSERT(ip->i_gdquot);
553
554 /*
ab680bb7
CH
555 * We do not have i_udquot locked at this point, but this check
556 * is OK since we don't depend on the i_gdquot to be accurate
557 * 100% all the time. It is just a hint, and this will
558 * succeed in general.
1da177e4 559 */
ab680bb7
CH
560 if (ip->i_udquot->q_gdquot != ip->i_gdquot)
561 xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
1da177e4
LT
562 }
563
7d095257 564 done:
ea15ab3c
CH
565#ifdef DEBUG
566 if (!error) {
1da177e4
LT
567 if (XFS_IS_UQUOTA_ON(mp))
568 ASSERT(ip->i_udquot);
c8ad20ff 569 if (XFS_IS_OQUOTA_ON(mp))
1da177e4
LT
570 ASSERT(ip->i_gdquot);
571 }
7d095257 572 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1da177e4 573#endif
7d095257
CH
574 return error;
575}
1da177e4 576
7d095257
CH
577int
578xfs_qm_dqattach(
579 struct xfs_inode *ip,
580 uint flags)
581{
582 int error;
583
b4d05e30
CH
584 if (!xfs_qm_need_dqattach(ip))
585 return 0;
586
7d095257
CH
587 xfs_ilock(ip, XFS_ILOCK_EXCL);
588 error = xfs_qm_dqattach_locked(ip, flags);
589 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1da177e4 590
014c2544 591 return error;
1da177e4
LT
592}
593
594/*
595 * Release dquots (and their references) if any.
596 * The inode should be locked EXCL except when this's called by
597 * xfs_ireclaim.
598 */
599void
600xfs_qm_dqdetach(
601 xfs_inode_t *ip)
602{
603 if (!(ip->i_udquot || ip->i_gdquot))
604 return;
605
0b1b213f
CH
606 trace_xfs_dquot_dqdetach(ip);
607
1da177e4
LT
608 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
609 ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
1da177e4
LT
610 if (ip->i_udquot) {
611 xfs_qm_dqrele(ip->i_udquot);
612 ip->i_udquot = NULL;
613 }
614 if (ip->i_gdquot) {
615 xfs_qm_dqrele(ip->i_gdquot);
616 ip->i_gdquot = NULL;
617 }
618}
619
3fe58f30
CH
620int
621xfs_qm_calc_dquots_per_chunk(
622 struct xfs_mount *mp,
623 unsigned int nbblks) /* basic block units */
624{
625 unsigned int ndquots;
626
627 ASSERT(nbblks > 0);
628 ndquots = BBTOB(nbblks);
629 do_div(ndquots, sizeof(xfs_dqblk_t));
630
631 return ndquots;
632}
633
1da177e4
LT
634/*
635 * This initializes all the quota information that's kept in the
636 * mount structure
637 */
ba0f32d4 638STATIC int
1da177e4
LT
639xfs_qm_init_quotainfo(
640 xfs_mount_t *mp)
641{
642 xfs_quotainfo_t *qinf;
643 int error;
644 xfs_dquot_t *dqp;
645
646 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
647
1da177e4
LT
648 qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
649
650 /*
651 * See if quotainodes are setup, and if not, allocate them,
652 * and change the superblock accordingly.
653 */
654 if ((error = xfs_qm_init_quotainos(mp))) {
f0e2d93c 655 kmem_free(qinf);
1da177e4 656 mp->m_quotainfo = NULL;
014c2544 657 return error;
1da177e4
LT
658 }
659
9f920f11
CH
660 INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
661 INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
662 mutex_init(&qinf->qi_tree_lock);
663
f8739c3c
CH
664 INIT_LIST_HEAD(&qinf->qi_lru_list);
665 qinf->qi_lru_count = 0;
666 mutex_init(&qinf->qi_lru_lock);
667
1da177e4 668 /* mutex used to serialize quotaoffs */
794ee1ba 669 mutex_init(&qinf->qi_quotaofflock);
1da177e4
LT
670
671 /* Precalc some constants */
672 qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
3fe58f30
CH
673 qinf->qi_dqperchunk = xfs_qm_calc_dquots_per_chunk(mp,
674 qinf->qi_dqchunklen);
1da177e4
LT
675
676 mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
677
678 /*
679 * We try to get the limits from the superuser's limits fields.
680 * This is quite hacky, but it is standard quota practice.
7ae44407 681 *
1da177e4
LT
682 * We look at the USR dquot with id == 0 first, but if user quotas
683 * are not enabled we goto the GRP dquot with id == 0.
684 * We don't really care to keep separate default limits for user
685 * and group quotas, at least not at this point.
7ae44407
CH
686 *
687 * Since we may not have done a quotacheck by this point, just read
688 * the dquot without attaching it to any hashtables or lists.
1da177e4 689 */
7ae44407
CH
690 error = xfs_qm_dqread(mp, 0,
691 XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
692 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
693 XFS_DQ_PROJ),
694 XFS_QMOPT_DOWARN, &dqp);
695 if (!error) {
1da177e4
LT
696 xfs_disk_dquot_t *ddqp = &dqp->q_core;
697
698 /*
699 * The warnings and timers set the grace period given to
700 * a user or group before he or she can not perform any
701 * more writing. If it is zero, a default is used.
702 */
1149d96a
CH
703 qinf->qi_btimelimit = ddqp->d_btimer ?
704 be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
705 qinf->qi_itimelimit = ddqp->d_itimer ?
706 be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
707 qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
708 be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
709 qinf->qi_bwarnlimit = ddqp->d_bwarns ?
710 be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
711 qinf->qi_iwarnlimit = ddqp->d_iwarns ?
712 be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
713 qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
714 be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
715 qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
716 qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
717 qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
718 qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
719 qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
720 qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
1da177e4 721
1da177e4
LT
722 xfs_qm_dqdestroy(dqp);
723 } else {
724 qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
725 qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
726 qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
727 qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
728 qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
06d10dd9 729 qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
1da177e4
LT
730 }
731
f8739c3c
CH
732 qinf->qi_shrinker.shrink = xfs_qm_shake;
733 qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
734 register_shrinker(&qinf->qi_shrinker);
014c2544 735 return 0;
1da177e4
LT
736}
737
738
739/*
740 * Gets called when unmounting a filesystem or when all quotas get
741 * turned off.
742 * This purges the quota inodes, destroys locks and frees itself.
743 */
744void
745xfs_qm_destroy_quotainfo(
746 xfs_mount_t *mp)
747{
748 xfs_quotainfo_t *qi;
749
750 qi = mp->m_quotainfo;
751 ASSERT(qi != NULL);
1da177e4 752
f8739c3c
CH
753 unregister_shrinker(&qi->qi_shrinker);
754
1da177e4 755 if (qi->qi_uquotaip) {
26cc0021 756 IRELE(qi->qi_uquotaip);
1da177e4
LT
757 qi->qi_uquotaip = NULL; /* paranoia */
758 }
759 if (qi->qi_gquotaip) {
26cc0021 760 IRELE(qi->qi_gquotaip);
1da177e4
LT
761 qi->qi_gquotaip = NULL;
762 }
763 mutex_destroy(&qi->qi_quotaofflock);
f0e2d93c 764 kmem_free(qi);
1da177e4
LT
765 mp->m_quotainfo = NULL;
766}
767
1da177e4
LT
768/*
769 * Create an inode and return with a reference already taken, but unlocked
770 * This is how we create quota inodes
771 */
772STATIC int
773xfs_qm_qino_alloc(
774 xfs_mount_t *mp,
775 xfs_inode_t **ip,
776 __int64_t sbfields,
777 uint flags)
778{
779 xfs_trans_t *tp;
780 int error;
1da177e4
LT
781 int committed;
782
061f7209 783 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
1da177e4
LT
784 if ((error = xfs_trans_reserve(tp,
785 XFS_QM_QINOCREATE_SPACE_RES(mp),
786 XFS_CREATE_LOG_RES(mp), 0,
787 XFS_TRANS_PERM_LOG_RES,
788 XFS_CREATE_LOG_COUNT))) {
789 xfs_trans_cancel(tp, 0);
014c2544 790 return error;
1da177e4 791 }
1da177e4 792
6c77b0ea
CH
793 error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip, &committed);
794 if (error) {
1da177e4
LT
795 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
796 XFS_TRANS_ABORT);
014c2544 797 return error;
1da177e4
LT
798 }
799
1da177e4
LT
800 /*
801 * Make the changes in the superblock, and log those too.
802 * sbfields arg may contain fields other than *QUOTINO;
803 * VERSIONNUM for example.
804 */
3685c2a1 805 spin_lock(&mp->m_sb_lock);
1da177e4 806 if (flags & XFS_QMOPT_SBVERSION) {
62118709 807 ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
1da177e4
LT
808 ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
809 XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
810 (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
811 XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
812
62118709 813 xfs_sb_version_addquota(&mp->m_sb);
1da177e4
LT
814 mp->m_sb.sb_uquotino = NULLFSINO;
815 mp->m_sb.sb_gquotino = NULLFSINO;
816
817 /* qflags will get updated _after_ quotacheck */
818 mp->m_sb.sb_qflags = 0;
1da177e4
LT
819 }
820 if (flags & XFS_QMOPT_UQUOTA)
821 mp->m_sb.sb_uquotino = (*ip)->i_ino;
822 else
823 mp->m_sb.sb_gquotino = (*ip)->i_ino;
3685c2a1 824 spin_unlock(&mp->m_sb_lock);
1da177e4
LT
825 xfs_mod_sb(tp, sbfields);
826
1c72bf90 827 if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
53487786 828 xfs_alert(mp, "%s failed (error %d)!", __func__, error);
014c2544 829 return error;
1da177e4 830 }
014c2544 831 return 0;
1da177e4
LT
832}
833
834
5b139738 835STATIC void
1da177e4
LT
836xfs_qm_reset_dqcounts(
837 xfs_mount_t *mp,
838 xfs_buf_t *bp,
839 xfs_dqid_t id,
840 uint type)
841{
842 xfs_disk_dquot_t *ddq;
843 int j;
844
0b1b213f
CH
845 trace_xfs_reset_dqcounts(bp, _RET_IP_);
846
1da177e4
LT
847 /*
848 * Reset all counters and timers. They'll be
849 * started afresh by xfs_qm_quotacheck.
850 */
851#ifdef DEBUG
852 j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
853 do_div(j, sizeof(xfs_dqblk_t));
8a7b8a89 854 ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
1da177e4 855#endif
62926044 856 ddq = bp->b_addr;
8a7b8a89 857 for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
1da177e4
LT
858 /*
859 * Do a sanity check, and if needed, repair the dqblk. Don't
860 * output any warnings because it's perfectly possible to
c41564b5 861 * find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
1da177e4 862 */
a0fa2b67 863 (void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
1da177e4 864 "xfs_quotacheck");
1149d96a
CH
865 ddq->d_bcount = 0;
866 ddq->d_icount = 0;
867 ddq->d_rtbcount = 0;
868 ddq->d_btimer = 0;
869 ddq->d_itimer = 0;
870 ddq->d_rtbtimer = 0;
871 ddq->d_bwarns = 0;
872 ddq->d_iwarns = 0;
873 ddq->d_rtbwarns = 0;
1da177e4
LT
874 ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
875 }
1da177e4
LT
876}
877
878STATIC int
879xfs_qm_dqiter_bufs(
43ff2122
CH
880 struct xfs_mount *mp,
881 xfs_dqid_t firstid,
882 xfs_fsblock_t bno,
883 xfs_filblks_t blkcnt,
884 uint flags,
885 struct list_head *buffer_list)
1da177e4 886{
43ff2122
CH
887 struct xfs_buf *bp;
888 int error;
889 int type;
1da177e4
LT
890
891 ASSERT(blkcnt > 0);
c8ad20ff
NS
892 type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
893 (flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
1da177e4
LT
894 error = 0;
895
896 /*
897 * Blkcnt arg can be a very big number, and might even be
898 * larger than the log itself. So, we have to break it up into
899 * manageable-sized transactions.
900 * Note that we don't start a permanent transaction here; we might
901 * not be able to get a log reservation for the whole thing up front,
902 * and we don't really care to either, because we just discard
903 * everything if we were to crash in the middle of this loop.
904 */
905 while (blkcnt--) {
906 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
907 XFS_FSB_TO_DADDR(mp, bno),
c6319198 908 mp->m_quotainfo->qi_dqchunklen, 0, &bp,
1813dd64 909 &xfs_dquot_buf_ops);
1da177e4
LT
910 if (error)
911 break;
912
3fe58f30
CH
913 /*
914 * XXX(hch): need to figure out if it makes sense to validate
915 * the CRC here.
916 */
5b139738 917 xfs_qm_reset_dqcounts(mp, bp, firstid, type);
43ff2122 918 xfs_buf_delwri_queue(bp, buffer_list);
61551f1e 919 xfs_buf_relse(bp);
1da177e4
LT
920 /*
921 * goto the next block.
922 */
923 bno++;
8a7b8a89 924 firstid += mp->m_quotainfo->qi_dqperchunk;
1da177e4 925 }
43ff2122 926
014c2544 927 return error;
1da177e4
LT
928}
929
930/*
c8ad20ff 931 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
1da177e4
LT
932 * caller supplied function for every chunk of dquots that we find.
933 */
934STATIC int
935xfs_qm_dqiterate(
43ff2122
CH
936 struct xfs_mount *mp,
937 struct xfs_inode *qip,
938 uint flags,
939 struct list_head *buffer_list)
1da177e4 940{
43ff2122 941 struct xfs_bmbt_irec *map;
1da177e4
LT
942 int i, nmaps; /* number of map entries */
943 int error; /* return value */
944 xfs_fileoff_t lblkno;
945 xfs_filblks_t maxlblkcnt;
946 xfs_dqid_t firstid;
947 xfs_fsblock_t rablkno;
948 xfs_filblks_t rablkcnt;
949
950 error = 0;
951 /*
c41564b5 952 * This looks racy, but we can't keep an inode lock across a
1da177e4
LT
953 * trans_reserve. But, this gets called during quotacheck, and that
954 * happens only at mount time which is single threaded.
955 */
956 if (qip->i_d.di_nblocks == 0)
014c2544 957 return 0;
1da177e4
LT
958
959 map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
960
961 lblkno = 0;
32972383 962 maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
1da177e4
LT
963 do {
964 nmaps = XFS_DQITER_MAP_SIZE;
965 /*
966 * We aren't changing the inode itself. Just changing
967 * some of its data. No new blocks are added here, and
968 * the inode is never added to the transaction.
969 */
970 xfs_ilock(qip, XFS_ILOCK_SHARED);
5c8ed202
DC
971 error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
972 map, &nmaps, 0);
1da177e4
LT
973 xfs_iunlock(qip, XFS_ILOCK_SHARED);
974 if (error)
975 break;
976
977 ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
978 for (i = 0; i < nmaps; i++) {
979 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
980 ASSERT(map[i].br_blockcount);
981
982
983 lblkno += map[i].br_blockcount;
984
985 if (map[i].br_startblock == HOLESTARTBLOCK)
986 continue;
987
988 firstid = (xfs_dqid_t) map[i].br_startoff *
8a7b8a89 989 mp->m_quotainfo->qi_dqperchunk;
1da177e4
LT
990 /*
991 * Do a read-ahead on the next extent.
992 */
993 if ((i+1 < nmaps) &&
994 (map[i+1].br_startblock != HOLESTARTBLOCK)) {
995 rablkcnt = map[i+1].br_blockcount;
996 rablkno = map[i+1].br_startblock;
997 while (rablkcnt--) {
1a1a3e97 998 xfs_buf_readahead(mp->m_ddev_targp,
1da177e4 999 XFS_FSB_TO_DADDR(mp, rablkno),
c3f8fc73
DC
1000 mp->m_quotainfo->qi_dqchunklen,
1001 NULL);
1da177e4
LT
1002 rablkno++;
1003 }
1004 }
1005 /*
1006 * Iterate thru all the blks in the extent and
1007 * reset the counters of all the dquots inside them.
1008 */
43ff2122
CH
1009 error = xfs_qm_dqiter_bufs(mp, firstid,
1010 map[i].br_startblock,
1011 map[i].br_blockcount,
1012 flags, buffer_list);
1013 if (error)
1014 goto out;
1da177e4 1015 }
1da177e4
LT
1016 } while (nmaps > 0);
1017
43ff2122 1018out:
f0e2d93c 1019 kmem_free(map);
014c2544 1020 return error;
1da177e4
LT
1021}
1022
1023/*
1024 * Called by dqusage_adjust in doing a quotacheck.
52fda114
CH
1025 *
1026 * Given the inode, and a dquot id this updates both the incore dqout as well
1027 * as the buffer copy. This is so that once the quotacheck is done, we can
1028 * just log all the buffers, as opposed to logging numerous updates to
1029 * individual dquots.
1da177e4 1030 */
52fda114 1031STATIC int
1da177e4 1032xfs_qm_quotacheck_dqadjust(
52fda114
CH
1033 struct xfs_inode *ip,
1034 xfs_dqid_t id,
1035 uint type,
1da177e4
LT
1036 xfs_qcnt_t nblks,
1037 xfs_qcnt_t rtblks)
1038{
52fda114
CH
1039 struct xfs_mount *mp = ip->i_mount;
1040 struct xfs_dquot *dqp;
1041 int error;
1042
1043 error = xfs_qm_dqget(mp, ip, id, type,
1044 XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1045 if (error) {
1046 /*
1047 * Shouldn't be able to turn off quotas here.
1048 */
1049 ASSERT(error != ESRCH);
1050 ASSERT(error != ENOENT);
1051 return error;
1052 }
0b1b213f
CH
1053
1054 trace_xfs_dqadjust(dqp);
1055
1da177e4
LT
1056 /*
1057 * Adjust the inode count and the block count to reflect this inode's
1058 * resource usage.
1059 */
413d57c9 1060 be64_add_cpu(&dqp->q_core.d_icount, 1);
1da177e4
LT
1061 dqp->q_res_icount++;
1062 if (nblks) {
413d57c9 1063 be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1da177e4
LT
1064 dqp->q_res_bcount += nblks;
1065 }
1066 if (rtblks) {
413d57c9 1067 be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1da177e4
LT
1068 dqp->q_res_rtbcount += rtblks;
1069 }
1070
1071 /*
1072 * Set default limits, adjust timers (since we changed usages)
191f8488
CH
1073 *
1074 * There are no timers for the default values set in the root dquot.
1da177e4 1075 */
191f8488 1076 if (dqp->q_core.d_id) {
4b6eae2e 1077 xfs_qm_adjust_dqlimits(mp, dqp);
52fda114 1078 xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1da177e4
LT
1079 }
1080
1081 dqp->dq_flags |= XFS_DQ_DIRTY;
52fda114
CH
1082 xfs_qm_dqput(dqp);
1083 return 0;
1da177e4
LT
1084}
1085
1086STATIC int
1087xfs_qm_get_rtblks(
1088 xfs_inode_t *ip,
1089 xfs_qcnt_t *O_rtblks)
1090{
1091 xfs_filblks_t rtblks; /* total rt blks */
4eea22f0 1092 xfs_extnum_t idx; /* extent record index */
1da177e4
LT
1093 xfs_ifork_t *ifp; /* inode fork pointer */
1094 xfs_extnum_t nextents; /* number of extent entries */
1da177e4
LT
1095 int error;
1096
1097 ASSERT(XFS_IS_REALTIME_INODE(ip));
1098 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1099 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1100 if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
014c2544 1101 return error;
1da177e4
LT
1102 }
1103 rtblks = 0;
4eea22f0 1104 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
a6f64d4a
CH
1105 for (idx = 0; idx < nextents; idx++)
1106 rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1da177e4 1107 *O_rtblks = (xfs_qcnt_t)rtblks;
014c2544 1108 return 0;
1da177e4
LT
1109}
1110
1111/*
1112 * callback routine supplied to bulkstat(). Given an inumber, find its
1113 * dquots and update them to account for resources taken by that inode.
1114 */
1115/* ARGSUSED */
1116STATIC int
1117xfs_qm_dqusage_adjust(
1118 xfs_mount_t *mp, /* mount point for filesystem */
1119 xfs_ino_t ino, /* inode number to get data for */
1120 void __user *buffer, /* not used */
1121 int ubsize, /* not used */
1da177e4 1122 int *ubused, /* not used */
1da177e4
LT
1123 int *res) /* result code value */
1124{
1125 xfs_inode_t *ip;
52fda114 1126 xfs_qcnt_t nblks, rtblks = 0;
1da177e4
LT
1127 int error;
1128
1129 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1130
1131 /*
1132 * rootino must have its resources accounted for, not so with the quota
1133 * inodes.
1134 */
1135 if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1136 *res = BULKSTAT_RV_NOTHING;
1137 return XFS_ERROR(EINVAL);
1138 }
1139
1140 /*
1141 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1142 * interface expects the inode to be exclusively locked because that's
1143 * the case in all other instances. It's OK that we do this because
1144 * quotacheck is done only at mount time.
1145 */
52fda114
CH
1146 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1147 if (error) {
1da177e4 1148 *res = BULKSTAT_RV_NOTHING;
014c2544 1149 return error;
1da177e4
LT
1150 }
1151
52fda114 1152 ASSERT(ip->i_delayed_blks == 0);
1da177e4 1153
52fda114 1154 if (XFS_IS_REALTIME_INODE(ip)) {
1da177e4
LT
1155 /*
1156 * Walk thru the extent list and count the realtime blocks.
1157 */
52fda114
CH
1158 error = xfs_qm_get_rtblks(ip, &rtblks);
1159 if (error)
1160 goto error0;
1da177e4 1161 }
1da177e4 1162
52fda114 1163 nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1da177e4
LT
1164
1165 /*
1166 * Add the (disk blocks and inode) resources occupied by this
1167 * inode to its dquots. We do this adjustment in the incore dquot,
1168 * and also copy the changes to its buffer.
1169 * We don't care about putting these changes in a transaction
1170 * envelope because if we crash in the middle of a 'quotacheck'
1171 * we have to start from the beginning anyway.
1172 * Once we're done, we'll log all the dquot bufs.
1173 *
c41564b5 1174 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1da177e4
LT
1175 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1176 */
1177 if (XFS_IS_UQUOTA_ON(mp)) {
52fda114
CH
1178 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1179 XFS_DQ_USER, nblks, rtblks);
1180 if (error)
1181 goto error0;
1da177e4 1182 }
52fda114
CH
1183
1184 if (XFS_IS_GQUOTA_ON(mp)) {
1185 error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1186 XFS_DQ_GROUP, nblks, rtblks);
1187 if (error)
1188 goto error0;
1da177e4 1189 }
1da177e4 1190
52fda114 1191 if (XFS_IS_PQUOTA_ON(mp)) {
6743099c 1192 error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
52fda114
CH
1193 XFS_DQ_PROJ, nblks, rtblks);
1194 if (error)
1195 goto error0;
1196 }
1197
1198 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1199 IRELE(ip);
1da177e4 1200 *res = BULKSTAT_RV_DIDONE;
014c2544 1201 return 0;
52fda114
CH
1202
1203error0:
1204 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1205 IRELE(ip);
1206 *res = BULKSTAT_RV_GIVEUP;
1207 return error;
1da177e4
LT
1208}
1209
b84a3a96
CH
1210STATIC int
1211xfs_qm_flush_one(
43ff2122
CH
1212 struct xfs_dquot *dqp,
1213 void *data)
b84a3a96 1214{
43ff2122 1215 struct list_head *buffer_list = data;
fe7257fd 1216 struct xfs_buf *bp = NULL;
b84a3a96
CH
1217 int error = 0;
1218
1219 xfs_dqlock(dqp);
1220 if (dqp->dq_flags & XFS_DQ_FREEING)
1221 goto out_unlock;
1222 if (!XFS_DQ_IS_DIRTY(dqp))
1223 goto out_unlock;
1224
43ff2122 1225 xfs_dqflock(dqp);
fe7257fd
CH
1226 error = xfs_qm_dqflush(dqp, &bp);
1227 if (error)
1228 goto out_unlock;
b84a3a96 1229
43ff2122 1230 xfs_buf_delwri_queue(bp, buffer_list);
fe7257fd 1231 xfs_buf_relse(bp);
b84a3a96
CH
1232out_unlock:
1233 xfs_dqunlock(dqp);
1234 return error;
1235}
1236
1da177e4
LT
1237/*
1238 * Walk thru all the filesystem inodes and construct a consistent view
1239 * of the disk quota world. If the quotacheck fails, disable quotas.
1240 */
1241int
1242xfs_qm_quotacheck(
1243 xfs_mount_t *mp)
1244{
b84a3a96 1245 int done, count, error, error2;
1da177e4
LT
1246 xfs_ino_t lastino;
1247 size_t structsz;
1248 xfs_inode_t *uip, *gip;
1249 uint flags;
43ff2122 1250 LIST_HEAD (buffer_list);
1da177e4
LT
1251
1252 count = INT_MAX;
1253 structsz = 1;
1254 lastino = 0;
1255 flags = 0;
1256
8a7b8a89 1257 ASSERT(mp->m_quotainfo->qi_uquotaip || mp->m_quotainfo->qi_gquotaip);
1da177e4
LT
1258 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1259
0b932ccc 1260 xfs_notice(mp, "Quotacheck needed: Please wait.");
1da177e4
LT
1261
1262 /*
c8ad20ff 1263 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1da177e4
LT
1264 * their counters to zero. We need a clean slate.
1265 * We don't log our changes till later.
1266 */
8a7b8a89
CH
1267 uip = mp->m_quotainfo->qi_uquotaip;
1268 if (uip) {
43ff2122
CH
1269 error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1270 &buffer_list);
8a7b8a89 1271 if (error)
1da177e4
LT
1272 goto error_return;
1273 flags |= XFS_UQUOTA_CHKD;
1274 }
1275
8a7b8a89
CH
1276 gip = mp->m_quotainfo->qi_gquotaip;
1277 if (gip) {
1278 error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
43ff2122
CH
1279 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA,
1280 &buffer_list);
8a7b8a89 1281 if (error)
1da177e4 1282 goto error_return;
c8ad20ff 1283 flags |= XFS_OQUOTA_CHKD;
1da177e4
LT
1284 }
1285
1286 do {
1287 /*
1288 * Iterate thru all the inodes in the file system,
1289 * adjusting the corresponding dquot counters in core.
1290 */
7dce11db
CH
1291 error = xfs_bulkstat(mp, &lastino, &count,
1292 xfs_qm_dqusage_adjust,
1293 structsz, NULL, &done);
1294 if (error)
1da177e4
LT
1295 break;
1296
7dce11db 1297 } while (!done);
1da177e4 1298
4b8879df 1299 /*
b84a3a96
CH
1300 * We've made all the changes that we need to make incore. Flush them
1301 * down to disk buffers if everything was updated successfully.
4b8879df 1302 */
43ff2122
CH
1303 if (XFS_IS_UQUOTA_ON(mp)) {
1304 error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1305 &buffer_list);
1306 }
b84a3a96 1307 if (XFS_IS_GQUOTA_ON(mp)) {
43ff2122
CH
1308 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1309 &buffer_list);
b84a3a96
CH
1310 if (!error)
1311 error = error2;
1312 }
1313 if (XFS_IS_PQUOTA_ON(mp)) {
43ff2122
CH
1314 error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1315 &buffer_list);
b84a3a96
CH
1316 if (!error)
1317 error = error2;
1318 }
4b8879df 1319
43ff2122
CH
1320 error2 = xfs_buf_delwri_submit(&buffer_list);
1321 if (!error)
1322 error = error2;
1323
1da177e4
LT
1324 /*
1325 * We can get this error if we couldn't do a dquot allocation inside
1326 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1327 * dirty dquots that might be cached, we just want to get rid of them
1328 * and turn quotaoff. The dquots won't be attached to any of the inodes
1329 * at this point (because we intentionally didn't in dqget_noattach).
1330 */
1331 if (error) {
8112e9dc 1332 xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1da177e4
LT
1333 goto error_return;
1334 }
1da177e4 1335
1da177e4
LT
1336 /*
1337 * If one type of quotas is off, then it will lose its
1338 * quotachecked status, since we won't be doing accounting for
1339 * that type anymore.
1340 */
4177af3a 1341 mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1da177e4
LT
1342 mp->m_qflags |= flags;
1343
1da177e4 1344 error_return:
43ff2122
CH
1345 while (!list_empty(&buffer_list)) {
1346 struct xfs_buf *bp =
1347 list_first_entry(&buffer_list, struct xfs_buf, b_list);
1348 list_del_init(&bp->b_list);
1349 xfs_buf_relse(bp);
1350 }
1351
1da177e4 1352 if (error) {
0b932ccc
DC
1353 xfs_warn(mp,
1354 "Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1355 error);
1da177e4
LT
1356 /*
1357 * We must turn off quotas.
1358 */
1359 ASSERT(mp->m_quotainfo != NULL);
1da177e4 1360 xfs_qm_destroy_quotainfo(mp);
31d5577b 1361 if (xfs_mount_reset_sbqflags(mp)) {
0b932ccc
DC
1362 xfs_warn(mp,
1363 "Quotacheck: Failed to reset quota flags.");
31d5577b 1364 }
0b932ccc
DC
1365 } else
1366 xfs_notice(mp, "Quotacheck: Done.");
1da177e4
LT
1367 return (error);
1368}
1369
1370/*
1371 * This is called after the superblock has been read in and we're ready to
1372 * iget the quota inodes.
1373 */
1374STATIC int
1375xfs_qm_init_quotainos(
1376 xfs_mount_t *mp)
1377{
1378 xfs_inode_t *uip, *gip;
1379 int error;
1380 __int64_t sbflags;
1381 uint flags;
1382
1383 ASSERT(mp->m_quotainfo);
1384 uip = gip = NULL;
1385 sbflags = 0;
1386 flags = 0;
1387
1388 /*
1389 * Get the uquota and gquota inodes
1390 */
62118709 1391 if (xfs_sb_version_hasquota(&mp->m_sb)) {
1da177e4
LT
1392 if (XFS_IS_UQUOTA_ON(mp) &&
1393 mp->m_sb.sb_uquotino != NULLFSINO) {
1394 ASSERT(mp->m_sb.sb_uquotino > 0);
1395 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
7b6259e7 1396 0, 0, &uip)))
1da177e4
LT
1397 return XFS_ERROR(error);
1398 }
c8ad20ff 1399 if (XFS_IS_OQUOTA_ON(mp) &&
1da177e4
LT
1400 mp->m_sb.sb_gquotino != NULLFSINO) {
1401 ASSERT(mp->m_sb.sb_gquotino > 0);
1402 if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
7b6259e7 1403 0, 0, &gip))) {
1da177e4 1404 if (uip)
43355099 1405 IRELE(uip);
1da177e4
LT
1406 return XFS_ERROR(error);
1407 }
1408 }
1409 } else {
1410 flags |= XFS_QMOPT_SBVERSION;
1411 sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
1412 XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
1413 }
1414
1415 /*
1416 * Create the two inodes, if they don't exist already. The changes
1417 * made above will get added to a transaction and logged in one of
1418 * the qino_alloc calls below. If the device is readonly,
1419 * temporarily switch to read-write to do this.
1420 */
1421 if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1422 if ((error = xfs_qm_qino_alloc(mp, &uip,
1423 sbflags | XFS_SB_UQUOTINO,
1424 flags | XFS_QMOPT_UQUOTA)))
1425 return XFS_ERROR(error);
1426
1427 flags &= ~XFS_QMOPT_SBVERSION;
1428 }
c8ad20ff
NS
1429 if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
1430 flags |= (XFS_IS_GQUOTA_ON(mp) ?
1431 XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
1432 error = xfs_qm_qino_alloc(mp, &gip,
1433 sbflags | XFS_SB_GQUOTINO, flags);
1434 if (error) {
1da177e4 1435 if (uip)
43355099 1436 IRELE(uip);
1da177e4
LT
1437
1438 return XFS_ERROR(error);
1439 }
1440 }
1441
8a7b8a89
CH
1442 mp->m_quotainfo->qi_uquotaip = uip;
1443 mp->m_quotainfo->qi_gquotaip = gip;
1da177e4 1444
014c2544 1445 return 0;
1da177e4
LT
1446}
1447
92b2e5b3
CH
1448STATIC void
1449xfs_qm_dqfree_one(
1450 struct xfs_dquot *dqp)
1451{
1452 struct xfs_mount *mp = dqp->q_mount;
1453 struct xfs_quotainfo *qi = mp->m_quotainfo;
1da177e4 1454
9f920f11
CH
1455 mutex_lock(&qi->qi_tree_lock);
1456 radix_tree_delete(XFS_DQUOT_TREE(qi, dqp->q_core.d_flags),
1457 be32_to_cpu(dqp->q_core.d_id));
368e1361 1458
92b2e5b3 1459 qi->qi_dquots--;
b84a3a96 1460 mutex_unlock(&qi->qi_tree_lock);
92b2e5b3
CH
1461
1462 xfs_qm_dqdestroy(dqp);
1463}
1464
1465STATIC void
1466xfs_qm_dqreclaim_one(
1467 struct xfs_dquot *dqp,
43ff2122 1468 struct list_head *buffer_list,
92b2e5b3 1469 struct list_head *dispose_list)
1da177e4 1470{
92b2e5b3 1471 struct xfs_mount *mp = dqp->q_mount;
f8739c3c 1472 struct xfs_quotainfo *qi = mp->m_quotainfo;
92b2e5b3 1473 int error;
1da177e4 1474
92b2e5b3 1475 if (!xfs_dqlock_nowait(dqp))
b870553c 1476 goto out_move_tail;
bf72de31 1477
92b2e5b3
CH
1478 /*
1479 * This dquot has acquired a reference in the meantime remove it from
1480 * the freelist and try again.
1481 */
1482 if (dqp->q_nrefs) {
1483 xfs_dqunlock(dqp);
1da177e4 1484
92b2e5b3 1485 trace_xfs_dqreclaim_want(dqp);
48776fd2 1486 XFS_STATS_INC(xs_qm_dqwants);
1da177e4 1487
f8739c3c
CH
1488 list_del_init(&dqp->q_lru);
1489 qi->qi_lru_count--;
48776fd2 1490 XFS_STATS_DEC(xs_qm_dquot_unused);
92b2e5b3
CH
1491 return;
1492 }
368e1361 1493
92b2e5b3
CH
1494 /*
1495 * Try to grab the flush lock. If this dquot is in the process of
1496 * getting flushed to disk, we don't want to reclaim it.
1497 */
1498 if (!xfs_dqflock_nowait(dqp))
b870553c 1499 goto out_unlock_move_tail;
0b1b213f 1500
92b2e5b3 1501 if (XFS_DQ_IS_DIRTY(dqp)) {
fe7257fd
CH
1502 struct xfs_buf *bp = NULL;
1503
92b2e5b3 1504 trace_xfs_dqreclaim_dirty(dqp);
0b1b213f 1505
fe7257fd 1506 error = xfs_qm_dqflush(dqp, &bp);
92b2e5b3
CH
1507 if (error) {
1508 xfs_warn(mp, "%s: dquot %p flush failed",
1509 __func__, dqp);
b870553c 1510 goto out_unlock_move_tail;
1da177e4 1511 }
368e1361 1512
43ff2122 1513 xfs_buf_delwri_queue(bp, buffer_list);
fe7257fd 1514 xfs_buf_relse(bp);
1da177e4 1515 /*
92b2e5b3
CH
1516 * Give the dquot another try on the freelist, as the
1517 * flushing will take some time.
1da177e4 1518 */
b870553c 1519 goto out_unlock_move_tail;
92b2e5b3
CH
1520 }
1521 xfs_dqfunlock(dqp);
92678554 1522
92b2e5b3
CH
1523 /*
1524 * Prevent lookups now that we are past the point of no return.
1525 */
1526 dqp->dq_flags |= XFS_DQ_FREEING;
1527 xfs_dqunlock(dqp);
92678554 1528
92b2e5b3 1529 ASSERT(dqp->q_nrefs == 0);
f8739c3c
CH
1530 list_move_tail(&dqp->q_lru, dispose_list);
1531 qi->qi_lru_count--;
48776fd2 1532 XFS_STATS_DEC(xs_qm_dquot_unused);
92678554 1533
92b2e5b3 1534 trace_xfs_dqreclaim_done(dqp);
48776fd2 1535 XFS_STATS_INC(xs_qm_dqreclaims);
92b2e5b3 1536 return;
1da177e4 1537
92b2e5b3
CH
1538 /*
1539 * Move the dquot to the tail of the list so that we don't spin on it.
1540 */
b870553c
DC
1541out_unlock_move_tail:
1542 xfs_dqunlock(dqp);
1543out_move_tail:
f8739c3c 1544 list_move_tail(&dqp->q_lru, &qi->qi_lru_list);
92b2e5b3 1545 trace_xfs_dqreclaim_busy(dqp);
48776fd2 1546 XFS_STATS_INC(xs_qm_dqreclaim_misses);
368e1361 1547}
1da177e4 1548
1da177e4 1549STATIC int
7f8275d0 1550xfs_qm_shake(
92b2e5b3
CH
1551 struct shrinker *shrink,
1552 struct shrink_control *sc)
1da177e4 1553{
f8739c3c
CH
1554 struct xfs_quotainfo *qi =
1555 container_of(shrink, struct xfs_quotainfo, qi_shrinker);
92b2e5b3 1556 int nr_to_scan = sc->nr_to_scan;
43ff2122 1557 LIST_HEAD (buffer_list);
92b2e5b3
CH
1558 LIST_HEAD (dispose_list);
1559 struct xfs_dquot *dqp;
43ff2122 1560 int error;
1da177e4 1561
92b2e5b3 1562 if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT))
014c2544 1563 return 0;
92b2e5b3
CH
1564 if (!nr_to_scan)
1565 goto out;
1da177e4 1566
f8739c3c
CH
1567 mutex_lock(&qi->qi_lru_lock);
1568 while (!list_empty(&qi->qi_lru_list)) {
92b2e5b3
CH
1569 if (nr_to_scan-- <= 0)
1570 break;
f8739c3c
CH
1571 dqp = list_first_entry(&qi->qi_lru_list, struct xfs_dquot,
1572 q_lru);
43ff2122 1573 xfs_qm_dqreclaim_one(dqp, &buffer_list, &dispose_list);
1da177e4 1574 }
f8739c3c 1575 mutex_unlock(&qi->qi_lru_lock);
1da177e4 1576
43ff2122
CH
1577 error = xfs_buf_delwri_submit(&buffer_list);
1578 if (error)
1579 xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
1580
92b2e5b3 1581 while (!list_empty(&dispose_list)) {
f8739c3c
CH
1582 dqp = list_first_entry(&dispose_list, struct xfs_dquot, q_lru);
1583 list_del_init(&dqp->q_lru);
92b2e5b3
CH
1584 xfs_qm_dqfree_one(dqp);
1585 }
43ff2122 1586
92b2e5b3 1587out:
f8739c3c 1588 return (qi->qi_lru_count / 100) * sysctl_vfs_cache_pressure;
1da177e4
LT
1589}
1590
1da177e4
LT
1591/*
1592 * Start a transaction and write the incore superblock changes to
1593 * disk. flags parameter indicates which fields have changed.
1594 */
1595int
1596xfs_qm_write_sb_changes(
1597 xfs_mount_t *mp,
1598 __int64_t flags)
1599{
1600 xfs_trans_t *tp;
1601 int error;
1602
1da177e4 1603 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
f910a8c6
JL
1604 error = xfs_trans_reserve(tp, 0, XFS_QM_SBCHANGE_LOG_RES(mp),
1605 0, 0, XFS_DEFAULT_LOG_COUNT);
1606 if (error) {
1da177e4 1607 xfs_trans_cancel(tp, 0);
014c2544 1608 return error;
1da177e4
LT
1609 }
1610
1611 xfs_mod_sb(tp, flags);
e5720eec 1612 error = xfs_trans_commit(tp, 0);
1da177e4 1613
e5720eec 1614 return error;
1da177e4
LT
1615}
1616
1617
1618/* --------------- utility functions for vnodeops ---------------- */
1619
1620
1621/*
6c77b0ea 1622 * Given an inode, a uid, gid and prid make sure that we have
1da177e4
LT
1623 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1624 * quotas by creating this file.
1625 * This also attaches dquot(s) to the given inode after locking it,
1626 * and returns the dquots corresponding to the uid and/or gid.
1627 *
1628 * in : inode (unlocked)
1629 * out : udquot, gdquot with references taken and unlocked
1630 */
1631int
1632xfs_qm_vop_dqalloc(
7d095257
CH
1633 struct xfs_inode *ip,
1634 uid_t uid,
1635 gid_t gid,
1636 prid_t prid,
1637 uint flags,
1638 struct xfs_dquot **O_udqpp,
1639 struct xfs_dquot **O_gdqpp)
1da177e4 1640{
7d095257
CH
1641 struct xfs_mount *mp = ip->i_mount;
1642 struct xfs_dquot *uq, *gq;
1643 int error;
1644 uint lockflags;
1da177e4 1645
7d095257 1646 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1da177e4
LT
1647 return 0;
1648
1649 lockflags = XFS_ILOCK_EXCL;
1650 xfs_ilock(ip, lockflags);
1651
bd186aa9 1652 if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1da177e4
LT
1653 gid = ip->i_d.di_gid;
1654
1655 /*
1656 * Attach the dquot(s) to this inode, doing a dquot allocation
1657 * if necessary. The dquot(s) will not be locked.
1658 */
1659 if (XFS_NOT_DQATTACHED(mp, ip)) {
7d095257
CH
1660 error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1661 if (error) {
1da177e4 1662 xfs_iunlock(ip, lockflags);
014c2544 1663 return error;
1da177e4
LT
1664 }
1665 }
1666
1667 uq = gq = NULL;
c8ad20ff 1668 if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1da177e4
LT
1669 if (ip->i_d.di_uid != uid) {
1670 /*
1671 * What we need is the dquot that has this uid, and
1672 * if we send the inode to dqget, the uid of the inode
1673 * takes priority over what's sent in the uid argument.
1674 * We must unlock inode here before calling dqget if
1675 * we're not sending the inode, because otherwise
1676 * we'll deadlock by doing trans_reserve while
1677 * holding ilock.
1678 */
1679 xfs_iunlock(ip, lockflags);
1680 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
1681 XFS_DQ_USER,
1682 XFS_QMOPT_DQALLOC |
1683 XFS_QMOPT_DOWARN,
1684 &uq))) {
1685 ASSERT(error != ENOENT);
014c2544 1686 return error;
1da177e4
LT
1687 }
1688 /*
1689 * Get the ilock in the right order.
1690 */
1691 xfs_dqunlock(uq);
1692 lockflags = XFS_ILOCK_SHARED;
1693 xfs_ilock(ip, lockflags);
1694 } else {
1695 /*
1696 * Take an extra reference, because we'll return
1697 * this to caller
1698 */
1699 ASSERT(ip->i_udquot);
78e55892 1700 uq = xfs_qm_dqhold(ip->i_udquot);
1da177e4
LT
1701 }
1702 }
c8ad20ff 1703 if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1da177e4
LT
1704 if (ip->i_d.di_gid != gid) {
1705 xfs_iunlock(ip, lockflags);
1706 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
1707 XFS_DQ_GROUP,
1708 XFS_QMOPT_DQALLOC |
1709 XFS_QMOPT_DOWARN,
1710 &gq))) {
1711 if (uq)
1712 xfs_qm_dqrele(uq);
1713 ASSERT(error != ENOENT);
014c2544 1714 return error;
1da177e4
LT
1715 }
1716 xfs_dqunlock(gq);
1717 lockflags = XFS_ILOCK_SHARED;
1718 xfs_ilock(ip, lockflags);
1719 } else {
1720 ASSERT(ip->i_gdquot);
78e55892 1721 gq = xfs_qm_dqhold(ip->i_gdquot);
1da177e4 1722 }
c8ad20ff 1723 } else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
6743099c 1724 if (xfs_get_projid(ip) != prid) {
c8ad20ff
NS
1725 xfs_iunlock(ip, lockflags);
1726 if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1727 XFS_DQ_PROJ,
1728 XFS_QMOPT_DQALLOC |
1729 XFS_QMOPT_DOWARN,
1730 &gq))) {
1731 if (uq)
1732 xfs_qm_dqrele(uq);
1733 ASSERT(error != ENOENT);
1734 return (error);
1735 }
1736 xfs_dqunlock(gq);
1737 lockflags = XFS_ILOCK_SHARED;
1738 xfs_ilock(ip, lockflags);
1739 } else {
1740 ASSERT(ip->i_gdquot);
78e55892 1741 gq = xfs_qm_dqhold(ip->i_gdquot);
c8ad20ff 1742 }
1da177e4
LT
1743 }
1744 if (uq)
0b1b213f 1745 trace_xfs_dquot_dqalloc(ip);
1da177e4
LT
1746
1747 xfs_iunlock(ip, lockflags);
1748 if (O_udqpp)
1749 *O_udqpp = uq;
1750 else if (uq)
1751 xfs_qm_dqrele(uq);
1752 if (O_gdqpp)
1753 *O_gdqpp = gq;
1754 else if (gq)
1755 xfs_qm_dqrele(gq);
014c2544 1756 return 0;
1da177e4
LT
1757}
1758
1759/*
1760 * Actually transfer ownership, and do dquot modifications.
1761 * These were already reserved.
1762 */
1763xfs_dquot_t *
1764xfs_qm_vop_chown(
1765 xfs_trans_t *tp,
1766 xfs_inode_t *ip,
1767 xfs_dquot_t **IO_olddq,
1768 xfs_dquot_t *newdq)
1769{
1770 xfs_dquot_t *prevdq;
06d10dd9
NS
1771 uint bfield = XFS_IS_REALTIME_INODE(ip) ?
1772 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1773
7d095257 1774
579aa9ca 1775 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1da177e4
LT
1776 ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1777
1778 /* old dquot */
1779 prevdq = *IO_olddq;
1780 ASSERT(prevdq);
1781 ASSERT(prevdq != newdq);
1782
06d10dd9
NS
1783 xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1784 xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1da177e4
LT
1785
1786 /* the sparkling new dquot */
06d10dd9
NS
1787 xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1788 xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1da177e4
LT
1789
1790 /*
78e55892
CH
1791 * Take an extra reference, because the inode is going to keep
1792 * this dquot pointer even after the trans_commit.
1da177e4 1793 */
78e55892 1794 *IO_olddq = xfs_qm_dqhold(newdq);
1da177e4 1795
014c2544 1796 return prevdq;
1da177e4
LT
1797}
1798
1799/*
c8ad20ff 1800 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1da177e4
LT
1801 */
1802int
1803xfs_qm_vop_chown_reserve(
1804 xfs_trans_t *tp,
1805 xfs_inode_t *ip,
1806 xfs_dquot_t *udqp,
1807 xfs_dquot_t *gdqp,
1808 uint flags)
1809{
7d095257 1810 xfs_mount_t *mp = ip->i_mount;
9a2a7de2 1811 uint delblks, blkflags, prjflags = 0;
1da177e4 1812 xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
7d095257
CH
1813 int error;
1814
1da177e4 1815
579aa9ca 1816 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1da177e4
LT
1817 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1818
1819 delblks = ip->i_delayed_blks;
1820 delblksudq = delblksgdq = unresudq = unresgdq = NULL;
06d10dd9
NS
1821 blkflags = XFS_IS_REALTIME_INODE(ip) ?
1822 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1da177e4
LT
1823
1824 if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1149d96a 1825 ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
1da177e4
LT
1826 delblksudq = udqp;
1827 /*
1828 * If there are delayed allocation blocks, then we have to
1829 * unreserve those from the old dquot, and add them to the
1830 * new dquot.
1831 */
1832 if (delblks) {
1833 ASSERT(ip->i_udquot);
1834 unresudq = ip->i_udquot;
1835 }
1836 }
c8ad20ff 1837 if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
9a2a7de2 1838 if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
6743099c 1839 xfs_get_projid(ip) != be32_to_cpu(gdqp->q_core.d_id))
9a2a7de2
NS
1840 prjflags = XFS_QMOPT_ENOSPC;
1841
1842 if (prjflags ||
1843 (XFS_IS_GQUOTA_ON(ip->i_mount) &&
1844 ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
c8ad20ff
NS
1845 delblksgdq = gdqp;
1846 if (delblks) {
1847 ASSERT(ip->i_gdquot);
1848 unresgdq = ip->i_gdquot;
1849 }
1da177e4
LT
1850 }
1851 }
1852
1853 if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1854 delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
9a2a7de2 1855 flags | blkflags | prjflags)))
1da177e4
LT
1856 return (error);
1857
1858 /*
1859 * Do the delayed blks reservations/unreservations now. Since, these
1860 * are done without the help of a transaction, if a reservation fails
1861 * its previous reservations won't be automatically undone by trans
1862 * code. So, we have to do it manually here.
1863 */
1864 if (delblks) {
1865 /*
1866 * Do the reservations first. Unreservation can't fail.
1867 */
1868 ASSERT(delblksudq || delblksgdq);
1869 ASSERT(unresudq || unresgdq);
1870 if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1871 delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
9a2a7de2 1872 flags | blkflags | prjflags)))
1da177e4
LT
1873 return (error);
1874 xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1875 unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
06d10dd9 1876 blkflags);
1da177e4
LT
1877 }
1878
1879 return (0);
1880}
1881
1882int
1883xfs_qm_vop_rename_dqattach(
7d095257 1884 struct xfs_inode **i_tab)
1da177e4 1885{
7d095257
CH
1886 struct xfs_mount *mp = i_tab[0]->i_mount;
1887 int i;
1da177e4 1888
7d095257 1889 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
014c2544 1890 return 0;
1da177e4 1891
7d095257
CH
1892 for (i = 0; (i < 4 && i_tab[i]); i++) {
1893 struct xfs_inode *ip = i_tab[i];
1894 int error;
1895
1da177e4
LT
1896 /*
1897 * Watch out for duplicate entries in the table.
1898 */
7d095257
CH
1899 if (i == 0 || ip != i_tab[i-1]) {
1900 if (XFS_NOT_DQATTACHED(mp, ip)) {
1da177e4
LT
1901 error = xfs_qm_dqattach(ip, 0);
1902 if (error)
014c2544 1903 return error;
1da177e4
LT
1904 }
1905 }
1906 }
014c2544 1907 return 0;
1da177e4
LT
1908}
1909
1910void
7d095257
CH
1911xfs_qm_vop_create_dqattach(
1912 struct xfs_trans *tp,
1913 struct xfs_inode *ip,
1914 struct xfs_dquot *udqp,
1915 struct xfs_dquot *gdqp)
1da177e4 1916{
7d095257
CH
1917 struct xfs_mount *mp = tp->t_mountp;
1918
1919 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1da177e4
LT
1920 return;
1921
579aa9ca 1922 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
7d095257 1923 ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1da177e4
LT
1924
1925 if (udqp) {
1da177e4 1926 ASSERT(ip->i_udquot == NULL);
7d095257 1927 ASSERT(XFS_IS_UQUOTA_ON(mp));
1149d96a 1928 ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
78e55892
CH
1929
1930 ip->i_udquot = xfs_qm_dqhold(udqp);
1da177e4
LT
1931 xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1932 }
1933 if (gdqp) {
1da177e4 1934 ASSERT(ip->i_gdquot == NULL);
7d095257
CH
1935 ASSERT(XFS_IS_OQUOTA_ON(mp));
1936 ASSERT((XFS_IS_GQUOTA_ON(mp) ?
6743099c 1937 ip->i_d.di_gid : xfs_get_projid(ip)) ==
ee2a4f7c 1938 be32_to_cpu(gdqp->q_core.d_id));
78e55892
CH
1939
1940 ip->i_gdquot = xfs_qm_dqhold(gdqp);
1da177e4
LT
1941 xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1942 }
1943}
1944