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1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18
19#include <linux/capability.h>
20
21#include "xfs.h"
22#include "xfs_fs.h"
23#include "xfs_bit.h"
24#include "xfs_log.h"
25#include "xfs_inum.h"
26#include "xfs_trans.h"
27#include "xfs_sb.h"
28#include "xfs_ag.h"
29#include "xfs_alloc.h"
30#include "xfs_quota.h"
31#include "xfs_mount.h"
32#include "xfs_bmap_btree.h"
33#include "xfs_inode.h"
34#include "xfs_itable.h"
35#include "xfs_bmap.h"
36#include "xfs_rtalloc.h"
37#include "xfs_error.h"
38#include "xfs_attr.h"
39#include "xfs_buf_item.h"
40#include "xfs_utils.h"
41#include "xfs_qm.h"
42#include "xfs_trace.h"
43
44STATIC int xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
45STATIC int xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
46 uint);
47STATIC uint xfs_qm_export_flags(uint);
48STATIC uint xfs_qm_export_qtype_flags(uint);
49STATIC void xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
50 fs_disk_quota_t *);
51
52
53/*
54 * Turn off quota accounting and/or enforcement for all udquots and/or
55 * gdquots. Called only at unmount time.
56 *
57 * This assumes that there are no dquots of this file system cached
58 * incore, and modifies the ondisk dquot directly. Therefore, for example,
59 * it is an error to call this twice, without purging the cache.
60 */
61int
62xfs_qm_scall_quotaoff(
63 xfs_mount_t *mp,
64 uint flags)
65{
66 struct xfs_quotainfo *q = mp->m_quotainfo;
67 uint dqtype;
68 int error;
69 uint inactivate_flags;
70 xfs_qoff_logitem_t *qoffstart;
71 int nculprits;
72
73 /*
74 * No file system can have quotas enabled on disk but not in core.
75 * Note that quota utilities (like quotaoff) _expect_
76 * errno == EEXIST here.
77 */
78 if ((mp->m_qflags & flags) == 0)
79 return XFS_ERROR(EEXIST);
80 error = 0;
81
82 flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
83
84 /*
85 * We don't want to deal with two quotaoffs messing up each other,
86 * so we're going to serialize it. quotaoff isn't exactly a performance
87 * critical thing.
88 * If quotaoff, then we must be dealing with the root filesystem.
89 */
90 ASSERT(q);
91 mutex_lock(&q->qi_quotaofflock);
92
93 /*
94 * If we're just turning off quota enforcement, change mp and go.
95 */
96 if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
97 mp->m_qflags &= ~(flags);
98
99 spin_lock(&mp->m_sb_lock);
100 mp->m_sb.sb_qflags = mp->m_qflags;
101 spin_unlock(&mp->m_sb_lock);
102 mutex_unlock(&q->qi_quotaofflock);
103
104 /* XXX what to do if error ? Revert back to old vals incore ? */
105 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
106 return (error);
107 }
108
109 dqtype = 0;
110 inactivate_flags = 0;
111 /*
112 * If accounting is off, we must turn enforcement off, clear the
113 * quota 'CHKD' certificate to make it known that we have to
114 * do a quotacheck the next time this quota is turned on.
115 */
116 if (flags & XFS_UQUOTA_ACCT) {
117 dqtype |= XFS_QMOPT_UQUOTA;
118 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
119 inactivate_flags |= XFS_UQUOTA_ACTIVE;
120 }
121 if (flags & XFS_GQUOTA_ACCT) {
122 dqtype |= XFS_QMOPT_GQUOTA;
123 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
124 inactivate_flags |= XFS_GQUOTA_ACTIVE;
125 } else if (flags & XFS_PQUOTA_ACCT) {
126 dqtype |= XFS_QMOPT_PQUOTA;
127 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
128 inactivate_flags |= XFS_PQUOTA_ACTIVE;
129 }
130
131 /*
132 * Nothing to do? Don't complain. This happens when we're just
133 * turning off quota enforcement.
134 */
135 if ((mp->m_qflags & flags) == 0)
136 goto out_unlock;
137
138 /*
139 * Write the LI_QUOTAOFF log record, and do SB changes atomically,
140 * and synchronously. If we fail to write, we should abort the
141 * operation as it cannot be recovered safely if we crash.
142 */
143 error = xfs_qm_log_quotaoff(mp, &qoffstart, flags);
144 if (error)
145 goto out_unlock;
146
147 /*
148 * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
149 * to take care of the race between dqget and quotaoff. We don't take
150 * any special locks to reset these bits. All processes need to check
151 * these bits *after* taking inode lock(s) to see if the particular
152 * quota type is in the process of being turned off. If *ACTIVE, it is
153 * guaranteed that all dquot structures and all quotainode ptrs will all
154 * stay valid as long as that inode is kept locked.
155 *
156 * There is no turning back after this.
157 */
158 mp->m_qflags &= ~inactivate_flags;
159
160 /*
161 * Give back all the dquot reference(s) held by inodes.
162 * Here we go thru every single incore inode in this file system, and
163 * do a dqrele on the i_udquot/i_gdquot that it may have.
164 * Essentially, as long as somebody has an inode locked, this guarantees
165 * that quotas will not be turned off. This is handy because in a
166 * transaction once we lock the inode(s) and check for quotaon, we can
167 * depend on the quota inodes (and other things) being valid as long as
168 * we keep the lock(s).
169 */
170 xfs_qm_dqrele_all_inodes(mp, flags);
171
172 /*
173 * Next we make the changes in the quota flag in the mount struct.
174 * This isn't protected by a particular lock directly, because we
175 * don't want to take a mrlock every time we depend on quotas being on.
176 */
177 mp->m_qflags &= ~(flags);
178
179 /*
180 * Go through all the dquots of this file system and purge them,
181 * according to what was turned off. We may not be able to get rid
182 * of all dquots, because dquots can have temporary references that
183 * are not attached to inodes. eg. xfs_setattr, xfs_create.
184 * So, if we couldn't purge all the dquots from the filesystem,
185 * we can't get rid of the incore data structures.
186 */
187 while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype)))
188 delay(10 * nculprits);
189
190 /*
191 * Transactions that had started before ACTIVE state bit was cleared
192 * could have logged many dquots, so they'd have higher LSNs than
193 * the first QUOTAOFF log record does. If we happen to crash when
194 * the tail of the log has gone past the QUOTAOFF record, but
195 * before the last dquot modification, those dquots __will__
196 * recover, and that's not good.
197 *
198 * So, we have QUOTAOFF start and end logitems; the start
199 * logitem won't get overwritten until the end logitem appears...
200 */
201 error = xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
202 if (error) {
203 /* We're screwed now. Shutdown is the only option. */
204 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
205 goto out_unlock;
206 }
207
208 /*
209 * If quotas is completely disabled, close shop.
210 */
211 if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
212 ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
213 mutex_unlock(&q->qi_quotaofflock);
214 xfs_qm_destroy_quotainfo(mp);
215 return (0);
216 }
217
218 /*
219 * Release our quotainode references if we don't need them anymore.
220 */
221 if ((dqtype & XFS_QMOPT_UQUOTA) && q->qi_uquotaip) {
222 IRELE(q->qi_uquotaip);
223 q->qi_uquotaip = NULL;
224 }
225 if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && q->qi_gquotaip) {
226 IRELE(q->qi_gquotaip);
227 q->qi_gquotaip = NULL;
228 }
229
230out_unlock:
231 mutex_unlock(&q->qi_quotaofflock);
232 return error;
233}
234
235STATIC int
236xfs_qm_scall_trunc_qfile(
237 struct xfs_mount *mp,
238 xfs_ino_t ino)
239{
240 struct xfs_inode *ip;
241 struct xfs_trans *tp;
242 int error;
243
244 if (ino == NULLFSINO)
245 return 0;
246
247 error = xfs_iget(mp, NULL, ino, 0, 0, &ip);
248 if (error)
249 return error;
250
251 xfs_ilock(ip, XFS_IOLOCK_EXCL);
252
253 tp = xfs_trans_alloc(mp, XFS_TRANS_TRUNCATE_FILE);
254 error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
255 XFS_TRANS_PERM_LOG_RES,
256 XFS_ITRUNCATE_LOG_COUNT);
257 if (error) {
258 xfs_trans_cancel(tp, 0);
259 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
260 goto out_put;
261 }
262
263 xfs_ilock(ip, XFS_ILOCK_EXCL);
264 xfs_trans_ijoin(tp, ip);
265
266 error = xfs_itruncate_data(&tp, ip, 0);
267 if (error) {
268 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
269 XFS_TRANS_ABORT);
270 goto out_unlock;
271 }
272
273 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
274 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
275
276out_unlock:
277 xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
278out_put:
279 IRELE(ip);
280 return error;
281}
282
283int
284xfs_qm_scall_trunc_qfiles(
285 xfs_mount_t *mp,
286 uint flags)
287{
288 int error = 0, error2 = 0;
289
290 if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0) {
291 xfs_debug(mp, "%s: flags=%x m_qflags=%x\n",
292 __func__, flags, mp->m_qflags);
293 return XFS_ERROR(EINVAL);
294 }
295
296 if (flags & XFS_DQ_USER)
297 error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_uquotino);
298 if (flags & (XFS_DQ_GROUP|XFS_DQ_PROJ))
299 error2 = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_gquotino);
300
301 return error ? error : error2;
302}
303
304/*
305 * Switch on (a given) quota enforcement for a filesystem. This takes
306 * effect immediately.
307 * (Switching on quota accounting must be done at mount time.)
308 */
309int
310xfs_qm_scall_quotaon(
311 xfs_mount_t *mp,
312 uint flags)
313{
314 int error;
315 uint qf;
316 __int64_t sbflags;
317
318 flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
319 /*
320 * Switching on quota accounting must be done at mount time.
321 */
322 flags &= ~(XFS_ALL_QUOTA_ACCT);
323
324 sbflags = 0;
325
326 if (flags == 0) {
327 xfs_debug(mp, "%s: zero flags, m_qflags=%x\n",
328 __func__, mp->m_qflags);
329 return XFS_ERROR(EINVAL);
330 }
331
332 /* No fs can turn on quotas with a delayed effect */
333 ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
334
335 /*
336 * Can't enforce without accounting. We check the superblock
337 * qflags here instead of m_qflags because rootfs can have
338 * quota acct on ondisk without m_qflags' knowing.
339 */
340 if (((flags & XFS_UQUOTA_ACCT) == 0 &&
341 (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
342 (flags & XFS_UQUOTA_ENFD))
343 ||
344 ((flags & XFS_PQUOTA_ACCT) == 0 &&
345 (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
346 (flags & XFS_GQUOTA_ACCT) == 0 &&
347 (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
348 (flags & XFS_OQUOTA_ENFD))) {
349 xfs_debug(mp,
350 "%s: Can't enforce without acct, flags=%x sbflags=%x\n",
351 __func__, flags, mp->m_sb.sb_qflags);
352 return XFS_ERROR(EINVAL);
353 }
354 /*
355 * If everything's up to-date incore, then don't waste time.
356 */
357 if ((mp->m_qflags & flags) == flags)
358 return XFS_ERROR(EEXIST);
359
360 /*
361 * Change sb_qflags on disk but not incore mp->qflags
362 * if this is the root filesystem.
363 */
364 spin_lock(&mp->m_sb_lock);
365 qf = mp->m_sb.sb_qflags;
366 mp->m_sb.sb_qflags = qf | flags;
367 spin_unlock(&mp->m_sb_lock);
368
369 /*
370 * There's nothing to change if it's the same.
371 */
372 if ((qf & flags) == flags && sbflags == 0)
373 return XFS_ERROR(EEXIST);
374 sbflags |= XFS_SB_QFLAGS;
375
376 if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
377 return (error);
378 /*
379 * If we aren't trying to switch on quota enforcement, we are done.
380 */
381 if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
382 (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
383 ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
384 (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
385 ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
386 (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
387 (flags & XFS_ALL_QUOTA_ENFD) == 0)
388 return (0);
389
390 if (! XFS_IS_QUOTA_RUNNING(mp))
391 return XFS_ERROR(ESRCH);
392
393 /*
394 * Switch on quota enforcement in core.
395 */
396 mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
397 mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
398 mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
399
400 return (0);
401}
402
403
404/*
405 * Return quota status information, such as uquota-off, enforcements, etc.
406 */
407int
408xfs_qm_scall_getqstat(
409 struct xfs_mount *mp,
410 struct fs_quota_stat *out)
411{
412 struct xfs_quotainfo *q = mp->m_quotainfo;
413 struct xfs_inode *uip, *gip;
414 boolean_t tempuqip, tempgqip;
415
416 uip = gip = NULL;
417 tempuqip = tempgqip = B_FALSE;
418 memset(out, 0, sizeof(fs_quota_stat_t));
419
420 out->qs_version = FS_QSTAT_VERSION;
421 if (!xfs_sb_version_hasquota(&mp->m_sb)) {
422 out->qs_uquota.qfs_ino = NULLFSINO;
423 out->qs_gquota.qfs_ino = NULLFSINO;
424 return (0);
425 }
426 out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
427 (XFS_ALL_QUOTA_ACCT|
428 XFS_ALL_QUOTA_ENFD));
429 out->qs_pad = 0;
430 out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
431 out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
432
433 if (q) {
434 uip = q->qi_uquotaip;
435 gip = q->qi_gquotaip;
436 }
437 if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
438 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
439 0, 0, &uip) == 0)
440 tempuqip = B_TRUE;
441 }
442 if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
443 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
444 0, 0, &gip) == 0)
445 tempgqip = B_TRUE;
446 }
447 if (uip) {
448 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
449 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
450 if (tempuqip)
451 IRELE(uip);
452 }
453 if (gip) {
454 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
455 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
456 if (tempgqip)
457 IRELE(gip);
458 }
459 if (q) {
460 out->qs_incoredqs = q->qi_dquots;
461 out->qs_btimelimit = q->qi_btimelimit;
462 out->qs_itimelimit = q->qi_itimelimit;
463 out->qs_rtbtimelimit = q->qi_rtbtimelimit;
464 out->qs_bwarnlimit = q->qi_bwarnlimit;
465 out->qs_iwarnlimit = q->qi_iwarnlimit;
466 }
467 return 0;
468}
469
470#define XFS_DQ_MASK \
471 (FS_DQ_LIMIT_MASK | FS_DQ_TIMER_MASK | FS_DQ_WARNS_MASK)
472
473/*
474 * Adjust quota limits, and start/stop timers accordingly.
475 */
476int
477xfs_qm_scall_setqlim(
478 xfs_mount_t *mp,
479 xfs_dqid_t id,
480 uint type,
481 fs_disk_quota_t *newlim)
482{
483 struct xfs_quotainfo *q = mp->m_quotainfo;
484 xfs_disk_dquot_t *ddq;
485 xfs_dquot_t *dqp;
486 xfs_trans_t *tp;
487 int error;
488 xfs_qcnt_t hard, soft;
489
490 if (newlim->d_fieldmask & ~XFS_DQ_MASK)
491 return EINVAL;
492 if ((newlim->d_fieldmask & XFS_DQ_MASK) == 0)
493 return 0;
494
495 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
496 if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
497 0, 0, XFS_DEFAULT_LOG_COUNT))) {
498 xfs_trans_cancel(tp, 0);
499 return (error);
500 }
501
502 /*
503 * We don't want to race with a quotaoff so take the quotaoff lock.
504 * (We don't hold an inode lock, so there's nothing else to stop
505 * a quotaoff from happening). (XXXThis doesn't currently happen
506 * because we take the vfslock before calling xfs_qm_sysent).
507 */
508 mutex_lock(&q->qi_quotaofflock);
509
510 /*
511 * Get the dquot (locked), and join it to the transaction.
512 * Allocate the dquot if this doesn't exist.
513 */
514 if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
515 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
516 ASSERT(error != ENOENT);
517 goto out_unlock;
518 }
519 xfs_trans_dqjoin(tp, dqp);
520 ddq = &dqp->q_core;
521
522 /*
523 * Make sure that hardlimits are >= soft limits before changing.
524 */
525 hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
526 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
527 be64_to_cpu(ddq->d_blk_hardlimit);
528 soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
529 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
530 be64_to_cpu(ddq->d_blk_softlimit);
531 if (hard == 0 || hard >= soft) {
532 ddq->d_blk_hardlimit = cpu_to_be64(hard);
533 ddq->d_blk_softlimit = cpu_to_be64(soft);
534 if (id == 0) {
535 q->qi_bhardlimit = hard;
536 q->qi_bsoftlimit = soft;
537 }
538 } else {
539 xfs_debug(mp, "blkhard %Ld < blksoft %Ld\n", hard, soft);
540 }
541 hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
542 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
543 be64_to_cpu(ddq->d_rtb_hardlimit);
544 soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
545 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
546 be64_to_cpu(ddq->d_rtb_softlimit);
547 if (hard == 0 || hard >= soft) {
548 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
549 ddq->d_rtb_softlimit = cpu_to_be64(soft);
550 if (id == 0) {
551 q->qi_rtbhardlimit = hard;
552 q->qi_rtbsoftlimit = soft;
553 }
554 } else {
555 xfs_debug(mp, "rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
556 }
557
558 hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
559 (xfs_qcnt_t) newlim->d_ino_hardlimit :
560 be64_to_cpu(ddq->d_ino_hardlimit);
561 soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
562 (xfs_qcnt_t) newlim->d_ino_softlimit :
563 be64_to_cpu(ddq->d_ino_softlimit);
564 if (hard == 0 || hard >= soft) {
565 ddq->d_ino_hardlimit = cpu_to_be64(hard);
566 ddq->d_ino_softlimit = cpu_to_be64(soft);
567 if (id == 0) {
568 q->qi_ihardlimit = hard;
569 q->qi_isoftlimit = soft;
570 }
571 } else {
572 xfs_debug(mp, "ihard %Ld < isoft %Ld\n", hard, soft);
573 }
574
575 /*
576 * Update warnings counter(s) if requested
577 */
578 if (newlim->d_fieldmask & FS_DQ_BWARNS)
579 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
580 if (newlim->d_fieldmask & FS_DQ_IWARNS)
581 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
582 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
583 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
584
585 if (id == 0) {
586 /*
587 * Timelimits for the super user set the relative time
588 * the other users can be over quota for this file system.
589 * If it is zero a default is used. Ditto for the default
590 * soft and hard limit values (already done, above), and
591 * for warnings.
592 */
593 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
594 q->qi_btimelimit = newlim->d_btimer;
595 ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
596 }
597 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
598 q->qi_itimelimit = newlim->d_itimer;
599 ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
600 }
601 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
602 q->qi_rtbtimelimit = newlim->d_rtbtimer;
603 ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
604 }
605 if (newlim->d_fieldmask & FS_DQ_BWARNS)
606 q->qi_bwarnlimit = newlim->d_bwarns;
607 if (newlim->d_fieldmask & FS_DQ_IWARNS)
608 q->qi_iwarnlimit = newlim->d_iwarns;
609 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
610 q->qi_rtbwarnlimit = newlim->d_rtbwarns;
611 } else {
612 /*
613 * If the user is now over quota, start the timelimit.
614 * The user will not be 'warned'.
615 * Note that we keep the timers ticking, whether enforcement
616 * is on or off. We don't really want to bother with iterating
617 * over all ondisk dquots and turning the timers on/off.
618 */
619 xfs_qm_adjust_dqtimers(mp, ddq);
620 }
621 dqp->dq_flags |= XFS_DQ_DIRTY;
622 xfs_trans_log_dquot(tp, dqp);
623
624 error = xfs_trans_commit(tp, 0);
625 xfs_qm_dqrele(dqp);
626
627 out_unlock:
628 mutex_unlock(&q->qi_quotaofflock);
629 return error;
630}
631
632int
633xfs_qm_scall_getquota(
634 xfs_mount_t *mp,
635 xfs_dqid_t id,
636 uint type,
637 fs_disk_quota_t *out)
638{
639 xfs_dquot_t *dqp;
640 int error;
641
642 /*
643 * Try to get the dquot. We don't want it allocated on disk, so
644 * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
645 * exist, we'll get ENOENT back.
646 */
647 if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
648 return (error);
649 }
650
651 /*
652 * If everything's NULL, this dquot doesn't quite exist as far as
653 * our utility programs are concerned.
654 */
655 if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
656 xfs_qm_dqput(dqp);
657 return XFS_ERROR(ENOENT);
658 }
659 /*
660 * Convert the disk dquot to the exportable format
661 */
662 xfs_qm_export_dquot(mp, &dqp->q_core, out);
663 xfs_qm_dqput(dqp);
664 return (error ? XFS_ERROR(EFAULT) : 0);
665}
666
667
668STATIC int
669xfs_qm_log_quotaoff_end(
670 xfs_mount_t *mp,
671 xfs_qoff_logitem_t *startqoff,
672 uint flags)
673{
674 xfs_trans_t *tp;
675 int error;
676 xfs_qoff_logitem_t *qoffi;
677
678 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
679
680 if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
681 0, 0, XFS_DEFAULT_LOG_COUNT))) {
682 xfs_trans_cancel(tp, 0);
683 return (error);
684 }
685
686 qoffi = xfs_trans_get_qoff_item(tp, startqoff,
687 flags & XFS_ALL_QUOTA_ACCT);
688 xfs_trans_log_quotaoff_item(tp, qoffi);
689
690 /*
691 * We have to make sure that the transaction is secure on disk before we
692 * return and actually stop quota accounting. So, make it synchronous.
693 * We don't care about quotoff's performance.
694 */
695 xfs_trans_set_sync(tp);
696 error = xfs_trans_commit(tp, 0);
697 return (error);
698}
699
700
701STATIC int
702xfs_qm_log_quotaoff(
703 xfs_mount_t *mp,
704 xfs_qoff_logitem_t **qoffstartp,
705 uint flags)
706{
707 xfs_trans_t *tp;
708 int error;
709 xfs_qoff_logitem_t *qoffi=NULL;
710 uint oldsbqflag=0;
711
712 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
713 if ((error = xfs_trans_reserve(tp, 0,
714 sizeof(xfs_qoff_logitem_t) * 2 +
715 mp->m_sb.sb_sectsize + 128,
716 0,
717 0,
718 XFS_DEFAULT_LOG_COUNT))) {
719 goto error0;
720 }
721
722 qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
723 xfs_trans_log_quotaoff_item(tp, qoffi);
724
725 spin_lock(&mp->m_sb_lock);
726 oldsbqflag = mp->m_sb.sb_qflags;
727 mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
728 spin_unlock(&mp->m_sb_lock);
729
730 xfs_mod_sb(tp, XFS_SB_QFLAGS);
731
732 /*
733 * We have to make sure that the transaction is secure on disk before we
734 * return and actually stop quota accounting. So, make it synchronous.
735 * We don't care about quotoff's performance.
736 */
737 xfs_trans_set_sync(tp);
738 error = xfs_trans_commit(tp, 0);
739
740error0:
741 if (error) {
742 xfs_trans_cancel(tp, 0);
743 /*
744 * No one else is modifying sb_qflags, so this is OK.
745 * We still hold the quotaofflock.
746 */
747 spin_lock(&mp->m_sb_lock);
748 mp->m_sb.sb_qflags = oldsbqflag;
749 spin_unlock(&mp->m_sb_lock);
750 }
751 *qoffstartp = qoffi;
752 return (error);
753}
754
755
756/*
757 * Translate an internal style on-disk-dquot to the exportable format.
758 * The main differences are that the counters/limits are all in Basic
759 * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
760 * to be converted to the native endianness.
761 */
762STATIC void
763xfs_qm_export_dquot(
764 xfs_mount_t *mp,
765 xfs_disk_dquot_t *src,
766 struct fs_disk_quota *dst)
767{
768 memset(dst, 0, sizeof(*dst));
769 dst->d_version = FS_DQUOT_VERSION; /* different from src->d_version */
770 dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
771 dst->d_id = be32_to_cpu(src->d_id);
772 dst->d_blk_hardlimit =
773 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
774 dst->d_blk_softlimit =
775 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
776 dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
777 dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
778 dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
779 dst->d_icount = be64_to_cpu(src->d_icount);
780 dst->d_btimer = be32_to_cpu(src->d_btimer);
781 dst->d_itimer = be32_to_cpu(src->d_itimer);
782 dst->d_iwarns = be16_to_cpu(src->d_iwarns);
783 dst->d_bwarns = be16_to_cpu(src->d_bwarns);
784 dst->d_rtb_hardlimit =
785 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
786 dst->d_rtb_softlimit =
787 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
788 dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
789 dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
790 dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
791
792 /*
793 * Internally, we don't reset all the timers when quota enforcement
794 * gets turned off. No need to confuse the user level code,
795 * so return zeroes in that case.
796 */
797 if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
798 (!XFS_IS_OQUOTA_ENFORCED(mp) &&
799 (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
800 dst->d_btimer = 0;
801 dst->d_itimer = 0;
802 dst->d_rtbtimer = 0;
803 }
804
805#ifdef DEBUG
806 if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == FS_USER_QUOTA) ||
807 (XFS_IS_OQUOTA_ENFORCED(mp) &&
808 (dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) &&
809 dst->d_id != 0) {
810 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
811 (dst->d_blk_softlimit > 0)) {
812 ASSERT(dst->d_btimer != 0);
813 }
814 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
815 (dst->d_ino_softlimit > 0)) {
816 ASSERT(dst->d_itimer != 0);
817 }
818 }
819#endif
820}
821
822STATIC uint
823xfs_qm_export_qtype_flags(
824 uint flags)
825{
826 /*
827 * Can't be more than one, or none.
828 */
829 ASSERT((flags & (FS_PROJ_QUOTA | FS_USER_QUOTA)) !=
830 (FS_PROJ_QUOTA | FS_USER_QUOTA));
831 ASSERT((flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)) !=
832 (FS_PROJ_QUOTA | FS_GROUP_QUOTA));
833 ASSERT((flags & (FS_USER_QUOTA | FS_GROUP_QUOTA)) !=
834 (FS_USER_QUOTA | FS_GROUP_QUOTA));
835 ASSERT((flags & (FS_PROJ_QUOTA|FS_USER_QUOTA|FS_GROUP_QUOTA)) != 0);
836
837 return (flags & XFS_DQ_USER) ?
838 FS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
839 FS_PROJ_QUOTA : FS_GROUP_QUOTA;
840}
841
842STATIC uint
843xfs_qm_export_flags(
844 uint flags)
845{
846 uint uflags;
847
848 uflags = 0;
849 if (flags & XFS_UQUOTA_ACCT)
850 uflags |= FS_QUOTA_UDQ_ACCT;
851 if (flags & XFS_PQUOTA_ACCT)
852 uflags |= FS_QUOTA_PDQ_ACCT;
853 if (flags & XFS_GQUOTA_ACCT)
854 uflags |= FS_QUOTA_GDQ_ACCT;
855 if (flags & XFS_UQUOTA_ENFD)
856 uflags |= FS_QUOTA_UDQ_ENFD;
857 if (flags & (XFS_OQUOTA_ENFD)) {
858 uflags |= (flags & XFS_GQUOTA_ACCT) ?
859 FS_QUOTA_GDQ_ENFD : FS_QUOTA_PDQ_ENFD;
860 }
861 return (uflags);
862}
863
864
865STATIC int
866xfs_dqrele_inode(
867 struct xfs_inode *ip,
868 struct xfs_perag *pag,
869 int flags)
870{
871 /* skip quota inodes */
872 if (ip == ip->i_mount->m_quotainfo->qi_uquotaip ||
873 ip == ip->i_mount->m_quotainfo->qi_gquotaip) {
874 ASSERT(ip->i_udquot == NULL);
875 ASSERT(ip->i_gdquot == NULL);
876 return 0;
877 }
878
879 xfs_ilock(ip, XFS_ILOCK_EXCL);
880 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
881 xfs_qm_dqrele(ip->i_udquot);
882 ip->i_udquot = NULL;
883 }
884 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
885 xfs_qm_dqrele(ip->i_gdquot);
886 ip->i_gdquot = NULL;
887 }
888 xfs_iunlock(ip, XFS_ILOCK_EXCL);
889 return 0;
890}
891
892
893/*
894 * Go thru all the inodes in the file system, releasing their dquots.
895 *
896 * Note that the mount structure gets modified to indicate that quotas are off
897 * AFTER this, in the case of quotaoff.
898 */
899void
900xfs_qm_dqrele_all_inodes(
901 struct xfs_mount *mp,
902 uint flags)
903{
904 ASSERT(mp->m_quotainfo);
905 xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags);
906}
1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18
19#include <linux/capability.h>
20
21#include "xfs.h"
22#include "xfs_fs.h"
23#include "xfs_shared.h"
24#include "xfs_format.h"
25#include "xfs_log_format.h"
26#include "xfs_trans_resv.h"
27#include "xfs_bit.h"
28#include "xfs_sb.h"
29#include "xfs_ag.h"
30#include "xfs_mount.h"
31#include "xfs_inode.h"
32#include "xfs_trans.h"
33#include "xfs_error.h"
34#include "xfs_quota.h"
35#include "xfs_qm.h"
36#include "xfs_trace.h"
37#include "xfs_icache.h"
38
39STATIC int xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
40STATIC int xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
41 uint);
42STATIC uint xfs_qm_export_flags(uint);
43STATIC uint xfs_qm_export_qtype_flags(uint);
44
45/*
46 * Turn off quota accounting and/or enforcement for all udquots and/or
47 * gdquots. Called only at unmount time.
48 *
49 * This assumes that there are no dquots of this file system cached
50 * incore, and modifies the ondisk dquot directly. Therefore, for example,
51 * it is an error to call this twice, without purging the cache.
52 */
53int
54xfs_qm_scall_quotaoff(
55 xfs_mount_t *mp,
56 uint flags)
57{
58 struct xfs_quotainfo *q = mp->m_quotainfo;
59 uint dqtype;
60 int error;
61 uint inactivate_flags;
62 xfs_qoff_logitem_t *qoffstart;
63
64 /*
65 * No file system can have quotas enabled on disk but not in core.
66 * Note that quota utilities (like quotaoff) _expect_
67 * errno == EEXIST here.
68 */
69 if ((mp->m_qflags & flags) == 0)
70 return XFS_ERROR(EEXIST);
71 error = 0;
72
73 flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
74
75 /*
76 * We don't want to deal with two quotaoffs messing up each other,
77 * so we're going to serialize it. quotaoff isn't exactly a performance
78 * critical thing.
79 * If quotaoff, then we must be dealing with the root filesystem.
80 */
81 ASSERT(q);
82 mutex_lock(&q->qi_quotaofflock);
83
84 /*
85 * If we're just turning off quota enforcement, change mp and go.
86 */
87 if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
88 mp->m_qflags &= ~(flags);
89
90 spin_lock(&mp->m_sb_lock);
91 mp->m_sb.sb_qflags = mp->m_qflags;
92 spin_unlock(&mp->m_sb_lock);
93 mutex_unlock(&q->qi_quotaofflock);
94
95 /* XXX what to do if error ? Revert back to old vals incore ? */
96 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
97 return (error);
98 }
99
100 dqtype = 0;
101 inactivate_flags = 0;
102 /*
103 * If accounting is off, we must turn enforcement off, clear the
104 * quota 'CHKD' certificate to make it known that we have to
105 * do a quotacheck the next time this quota is turned on.
106 */
107 if (flags & XFS_UQUOTA_ACCT) {
108 dqtype |= XFS_QMOPT_UQUOTA;
109 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
110 inactivate_flags |= XFS_UQUOTA_ACTIVE;
111 }
112 if (flags & XFS_GQUOTA_ACCT) {
113 dqtype |= XFS_QMOPT_GQUOTA;
114 flags |= (XFS_GQUOTA_CHKD | XFS_GQUOTA_ENFD);
115 inactivate_flags |= XFS_GQUOTA_ACTIVE;
116 }
117 if (flags & XFS_PQUOTA_ACCT) {
118 dqtype |= XFS_QMOPT_PQUOTA;
119 flags |= (XFS_PQUOTA_CHKD | XFS_PQUOTA_ENFD);
120 inactivate_flags |= XFS_PQUOTA_ACTIVE;
121 }
122
123 /*
124 * Nothing to do? Don't complain. This happens when we're just
125 * turning off quota enforcement.
126 */
127 if ((mp->m_qflags & flags) == 0)
128 goto out_unlock;
129
130 /*
131 * Write the LI_QUOTAOFF log record, and do SB changes atomically,
132 * and synchronously. If we fail to write, we should abort the
133 * operation as it cannot be recovered safely if we crash.
134 */
135 error = xfs_qm_log_quotaoff(mp, &qoffstart, flags);
136 if (error)
137 goto out_unlock;
138
139 /*
140 * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
141 * to take care of the race between dqget and quotaoff. We don't take
142 * any special locks to reset these bits. All processes need to check
143 * these bits *after* taking inode lock(s) to see if the particular
144 * quota type is in the process of being turned off. If *ACTIVE, it is
145 * guaranteed that all dquot structures and all quotainode ptrs will all
146 * stay valid as long as that inode is kept locked.
147 *
148 * There is no turning back after this.
149 */
150 mp->m_qflags &= ~inactivate_flags;
151
152 /*
153 * Give back all the dquot reference(s) held by inodes.
154 * Here we go thru every single incore inode in this file system, and
155 * do a dqrele on the i_udquot/i_gdquot that it may have.
156 * Essentially, as long as somebody has an inode locked, this guarantees
157 * that quotas will not be turned off. This is handy because in a
158 * transaction once we lock the inode(s) and check for quotaon, we can
159 * depend on the quota inodes (and other things) being valid as long as
160 * we keep the lock(s).
161 */
162 xfs_qm_dqrele_all_inodes(mp, flags);
163
164 /*
165 * Next we make the changes in the quota flag in the mount struct.
166 * This isn't protected by a particular lock directly, because we
167 * don't want to take a mrlock every time we depend on quotas being on.
168 */
169 mp->m_qflags &= ~flags;
170
171 /*
172 * Go through all the dquots of this file system and purge them,
173 * according to what was turned off.
174 */
175 xfs_qm_dqpurge_all(mp, dqtype);
176
177 /*
178 * Transactions that had started before ACTIVE state bit was cleared
179 * could have logged many dquots, so they'd have higher LSNs than
180 * the first QUOTAOFF log record does. If we happen to crash when
181 * the tail of the log has gone past the QUOTAOFF record, but
182 * before the last dquot modification, those dquots __will__
183 * recover, and that's not good.
184 *
185 * So, we have QUOTAOFF start and end logitems; the start
186 * logitem won't get overwritten until the end logitem appears...
187 */
188 error = xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
189 if (error) {
190 /* We're screwed now. Shutdown is the only option. */
191 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
192 goto out_unlock;
193 }
194
195 /*
196 * If all quotas are completely turned off, close shop.
197 */
198 if (mp->m_qflags == 0) {
199 mutex_unlock(&q->qi_quotaofflock);
200 xfs_qm_destroy_quotainfo(mp);
201 return (0);
202 }
203
204 /*
205 * Release our quotainode references if we don't need them anymore.
206 */
207 if ((dqtype & XFS_QMOPT_UQUOTA) && q->qi_uquotaip) {
208 IRELE(q->qi_uquotaip);
209 q->qi_uquotaip = NULL;
210 }
211 if ((dqtype & XFS_QMOPT_GQUOTA) && q->qi_gquotaip) {
212 IRELE(q->qi_gquotaip);
213 q->qi_gquotaip = NULL;
214 }
215 if ((dqtype & XFS_QMOPT_PQUOTA) && q->qi_pquotaip) {
216 IRELE(q->qi_pquotaip);
217 q->qi_pquotaip = NULL;
218 }
219
220out_unlock:
221 mutex_unlock(&q->qi_quotaofflock);
222 return error;
223}
224
225STATIC int
226xfs_qm_scall_trunc_qfile(
227 struct xfs_mount *mp,
228 xfs_ino_t ino)
229{
230 struct xfs_inode *ip;
231 struct xfs_trans *tp;
232 int error;
233
234 if (ino == NULLFSINO)
235 return 0;
236
237 error = xfs_iget(mp, NULL, ino, 0, 0, &ip);
238 if (error)
239 return error;
240
241 xfs_ilock(ip, XFS_IOLOCK_EXCL);
242
243 tp = xfs_trans_alloc(mp, XFS_TRANS_TRUNCATE_FILE);
244 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
245 if (error) {
246 xfs_trans_cancel(tp, 0);
247 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
248 goto out_put;
249 }
250
251 xfs_ilock(ip, XFS_ILOCK_EXCL);
252 xfs_trans_ijoin(tp, ip, 0);
253
254 ip->i_d.di_size = 0;
255 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
256
257 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0);
258 if (error) {
259 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
260 XFS_TRANS_ABORT);
261 goto out_unlock;
262 }
263
264 ASSERT(ip->i_d.di_nextents == 0);
265
266 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
267 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
268
269out_unlock:
270 xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
271out_put:
272 IRELE(ip);
273 return error;
274}
275
276int
277xfs_qm_scall_trunc_qfiles(
278 xfs_mount_t *mp,
279 uint flags)
280{
281 int error;
282
283 if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0) {
284 xfs_debug(mp, "%s: flags=%x m_qflags=%x",
285 __func__, flags, mp->m_qflags);
286 return XFS_ERROR(EINVAL);
287 }
288
289 if (flags & XFS_DQ_USER) {
290 error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_uquotino);
291 if (error)
292 return error;
293 }
294 if (flags & XFS_DQ_GROUP) {
295 error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_gquotino);
296 if (error)
297 return error;
298 }
299 if (flags & XFS_DQ_PROJ)
300 error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_pquotino);
301
302 return error;
303}
304
305/*
306 * Switch on (a given) quota enforcement for a filesystem. This takes
307 * effect immediately.
308 * (Switching on quota accounting must be done at mount time.)
309 */
310int
311xfs_qm_scall_quotaon(
312 xfs_mount_t *mp,
313 uint flags)
314{
315 int error;
316 uint qf;
317 __int64_t sbflags;
318
319 flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
320 /*
321 * Switching on quota accounting must be done at mount time.
322 */
323 flags &= ~(XFS_ALL_QUOTA_ACCT);
324
325 sbflags = 0;
326
327 if (flags == 0) {
328 xfs_debug(mp, "%s: zero flags, m_qflags=%x",
329 __func__, mp->m_qflags);
330 return XFS_ERROR(EINVAL);
331 }
332
333 /* No fs can turn on quotas with a delayed effect */
334 ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
335
336 /*
337 * Can't enforce without accounting. We check the superblock
338 * qflags here instead of m_qflags because rootfs can have
339 * quota acct on ondisk without m_qflags' knowing.
340 */
341 if (((flags & XFS_UQUOTA_ACCT) == 0 &&
342 (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
343 (flags & XFS_UQUOTA_ENFD)) ||
344 ((flags & XFS_GQUOTA_ACCT) == 0 &&
345 (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
346 (flags & XFS_GQUOTA_ENFD)) ||
347 ((flags & XFS_PQUOTA_ACCT) == 0 &&
348 (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
349 (flags & XFS_PQUOTA_ENFD))) {
350 xfs_debug(mp,
351 "%s: Can't enforce without acct, flags=%x sbflags=%x",
352 __func__, flags, mp->m_sb.sb_qflags);
353 return XFS_ERROR(EINVAL);
354 }
355 /*
356 * If everything's up to-date incore, then don't waste time.
357 */
358 if ((mp->m_qflags & flags) == flags)
359 return XFS_ERROR(EEXIST);
360
361 /*
362 * Change sb_qflags on disk but not incore mp->qflags
363 * if this is the root filesystem.
364 */
365 spin_lock(&mp->m_sb_lock);
366 qf = mp->m_sb.sb_qflags;
367 mp->m_sb.sb_qflags = qf | flags;
368 spin_unlock(&mp->m_sb_lock);
369
370 /*
371 * There's nothing to change if it's the same.
372 */
373 if ((qf & flags) == flags && sbflags == 0)
374 return XFS_ERROR(EEXIST);
375 sbflags |= XFS_SB_QFLAGS;
376
377 if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
378 return (error);
379 /*
380 * If we aren't trying to switch on quota enforcement, we are done.
381 */
382 if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
383 (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
384 ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
385 (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
386 ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
387 (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
388 (flags & XFS_ALL_QUOTA_ENFD) == 0)
389 return (0);
390
391 if (! XFS_IS_QUOTA_RUNNING(mp))
392 return XFS_ERROR(ESRCH);
393
394 /*
395 * Switch on quota enforcement in core.
396 */
397 mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
398 mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
399 mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
400
401 return (0);
402}
403
404
405/*
406 * Return quota status information, such as uquota-off, enforcements, etc.
407 * for Q_XGETQSTAT command.
408 */
409int
410xfs_qm_scall_getqstat(
411 struct xfs_mount *mp,
412 struct fs_quota_stat *out)
413{
414 struct xfs_quotainfo *q = mp->m_quotainfo;
415 struct xfs_inode *uip = NULL;
416 struct xfs_inode *gip = NULL;
417 struct xfs_inode *pip = NULL;
418 bool tempuqip = false;
419 bool tempgqip = false;
420 bool temppqip = false;
421
422 memset(out, 0, sizeof(fs_quota_stat_t));
423
424 out->qs_version = FS_QSTAT_VERSION;
425 if (!xfs_sb_version_hasquota(&mp->m_sb)) {
426 out->qs_uquota.qfs_ino = NULLFSINO;
427 out->qs_gquota.qfs_ino = NULLFSINO;
428 return (0);
429 }
430
431 out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
432 (XFS_ALL_QUOTA_ACCT|
433 XFS_ALL_QUOTA_ENFD));
434 if (q) {
435 uip = q->qi_uquotaip;
436 gip = q->qi_gquotaip;
437 pip = q->qi_pquotaip;
438 }
439 if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
440 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
441 0, 0, &uip) == 0)
442 tempuqip = true;
443 }
444 if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
445 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
446 0, 0, &gip) == 0)
447 tempgqip = true;
448 }
449 /*
450 * Q_XGETQSTAT doesn't have room for both group and project quotas.
451 * So, allow the project quota values to be copied out only if
452 * there is no group quota information available.
453 */
454 if (!gip) {
455 if (!pip && mp->m_sb.sb_pquotino != NULLFSINO) {
456 if (xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
457 0, 0, &pip) == 0)
458 temppqip = true;
459 }
460 } else
461 pip = NULL;
462 if (uip) {
463 out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
464 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
465 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
466 if (tempuqip)
467 IRELE(uip);
468 }
469
470 if (gip) {
471 out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
472 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
473 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
474 if (tempgqip)
475 IRELE(gip);
476 }
477 if (pip) {
478 out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
479 out->qs_gquota.qfs_nblks = pip->i_d.di_nblocks;
480 out->qs_gquota.qfs_nextents = pip->i_d.di_nextents;
481 if (temppqip)
482 IRELE(pip);
483 }
484 if (q) {
485 out->qs_incoredqs = q->qi_dquots;
486 out->qs_btimelimit = q->qi_btimelimit;
487 out->qs_itimelimit = q->qi_itimelimit;
488 out->qs_rtbtimelimit = q->qi_rtbtimelimit;
489 out->qs_bwarnlimit = q->qi_bwarnlimit;
490 out->qs_iwarnlimit = q->qi_iwarnlimit;
491 }
492 return 0;
493}
494
495/*
496 * Return quota status information, such as uquota-off, enforcements, etc.
497 * for Q_XGETQSTATV command, to support separate project quota field.
498 */
499int
500xfs_qm_scall_getqstatv(
501 struct xfs_mount *mp,
502 struct fs_quota_statv *out)
503{
504 struct xfs_quotainfo *q = mp->m_quotainfo;
505 struct xfs_inode *uip = NULL;
506 struct xfs_inode *gip = NULL;
507 struct xfs_inode *pip = NULL;
508 bool tempuqip = false;
509 bool tempgqip = false;
510 bool temppqip = false;
511
512 if (!xfs_sb_version_hasquota(&mp->m_sb)) {
513 out->qs_uquota.qfs_ino = NULLFSINO;
514 out->qs_gquota.qfs_ino = NULLFSINO;
515 out->qs_pquota.qfs_ino = NULLFSINO;
516 return (0);
517 }
518
519 out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
520 (XFS_ALL_QUOTA_ACCT|
521 XFS_ALL_QUOTA_ENFD));
522 out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
523 out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
524 out->qs_pquota.qfs_ino = mp->m_sb.sb_pquotino;
525
526 if (q) {
527 uip = q->qi_uquotaip;
528 gip = q->qi_gquotaip;
529 pip = q->qi_pquotaip;
530 }
531 if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
532 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
533 0, 0, &uip) == 0)
534 tempuqip = true;
535 }
536 if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
537 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
538 0, 0, &gip) == 0)
539 tempgqip = true;
540 }
541 if (!pip && mp->m_sb.sb_pquotino != NULLFSINO) {
542 if (xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
543 0, 0, &pip) == 0)
544 temppqip = true;
545 }
546 if (uip) {
547 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
548 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
549 if (tempuqip)
550 IRELE(uip);
551 }
552
553 if (gip) {
554 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
555 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
556 if (tempgqip)
557 IRELE(gip);
558 }
559 if (pip) {
560 out->qs_pquota.qfs_nblks = pip->i_d.di_nblocks;
561 out->qs_pquota.qfs_nextents = pip->i_d.di_nextents;
562 if (temppqip)
563 IRELE(pip);
564 }
565 if (q) {
566 out->qs_incoredqs = q->qi_dquots;
567 out->qs_btimelimit = q->qi_btimelimit;
568 out->qs_itimelimit = q->qi_itimelimit;
569 out->qs_rtbtimelimit = q->qi_rtbtimelimit;
570 out->qs_bwarnlimit = q->qi_bwarnlimit;
571 out->qs_iwarnlimit = q->qi_iwarnlimit;
572 }
573 return 0;
574}
575
576#define XFS_DQ_MASK \
577 (FS_DQ_LIMIT_MASK | FS_DQ_TIMER_MASK | FS_DQ_WARNS_MASK)
578
579/*
580 * Adjust quota limits, and start/stop timers accordingly.
581 */
582int
583xfs_qm_scall_setqlim(
584 struct xfs_mount *mp,
585 xfs_dqid_t id,
586 uint type,
587 fs_disk_quota_t *newlim)
588{
589 struct xfs_quotainfo *q = mp->m_quotainfo;
590 struct xfs_disk_dquot *ddq;
591 struct xfs_dquot *dqp;
592 struct xfs_trans *tp;
593 int error;
594 xfs_qcnt_t hard, soft;
595
596 if (newlim->d_fieldmask & ~XFS_DQ_MASK)
597 return EINVAL;
598 if ((newlim->d_fieldmask & XFS_DQ_MASK) == 0)
599 return 0;
600
601 /*
602 * We don't want to race with a quotaoff so take the quotaoff lock.
603 * We don't hold an inode lock, so there's nothing else to stop
604 * a quotaoff from happening.
605 */
606 mutex_lock(&q->qi_quotaofflock);
607
608 /*
609 * Get the dquot (locked) before we start, as we need to do a
610 * transaction to allocate it if it doesn't exist. Once we have the
611 * dquot, unlock it so we can start the next transaction safely. We hold
612 * a reference to the dquot, so it's safe to do this unlock/lock without
613 * it being reclaimed in the mean time.
614 */
615 error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp);
616 if (error) {
617 ASSERT(error != ENOENT);
618 goto out_unlock;
619 }
620 xfs_dqunlock(dqp);
621
622 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
623 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_setqlim, 0, 0);
624 if (error) {
625 xfs_trans_cancel(tp, 0);
626 goto out_rele;
627 }
628
629 xfs_dqlock(dqp);
630 xfs_trans_dqjoin(tp, dqp);
631 ddq = &dqp->q_core;
632
633 /*
634 * Make sure that hardlimits are >= soft limits before changing.
635 */
636 hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
637 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
638 be64_to_cpu(ddq->d_blk_hardlimit);
639 soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
640 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
641 be64_to_cpu(ddq->d_blk_softlimit);
642 if (hard == 0 || hard >= soft) {
643 ddq->d_blk_hardlimit = cpu_to_be64(hard);
644 ddq->d_blk_softlimit = cpu_to_be64(soft);
645 xfs_dquot_set_prealloc_limits(dqp);
646 if (id == 0) {
647 q->qi_bhardlimit = hard;
648 q->qi_bsoftlimit = soft;
649 }
650 } else {
651 xfs_debug(mp, "blkhard %Ld < blksoft %Ld", hard, soft);
652 }
653 hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
654 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
655 be64_to_cpu(ddq->d_rtb_hardlimit);
656 soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
657 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
658 be64_to_cpu(ddq->d_rtb_softlimit);
659 if (hard == 0 || hard >= soft) {
660 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
661 ddq->d_rtb_softlimit = cpu_to_be64(soft);
662 if (id == 0) {
663 q->qi_rtbhardlimit = hard;
664 q->qi_rtbsoftlimit = soft;
665 }
666 } else {
667 xfs_debug(mp, "rtbhard %Ld < rtbsoft %Ld", hard, soft);
668 }
669
670 hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
671 (xfs_qcnt_t) newlim->d_ino_hardlimit :
672 be64_to_cpu(ddq->d_ino_hardlimit);
673 soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
674 (xfs_qcnt_t) newlim->d_ino_softlimit :
675 be64_to_cpu(ddq->d_ino_softlimit);
676 if (hard == 0 || hard >= soft) {
677 ddq->d_ino_hardlimit = cpu_to_be64(hard);
678 ddq->d_ino_softlimit = cpu_to_be64(soft);
679 if (id == 0) {
680 q->qi_ihardlimit = hard;
681 q->qi_isoftlimit = soft;
682 }
683 } else {
684 xfs_debug(mp, "ihard %Ld < isoft %Ld", hard, soft);
685 }
686
687 /*
688 * Update warnings counter(s) if requested
689 */
690 if (newlim->d_fieldmask & FS_DQ_BWARNS)
691 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
692 if (newlim->d_fieldmask & FS_DQ_IWARNS)
693 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
694 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
695 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
696
697 if (id == 0) {
698 /*
699 * Timelimits for the super user set the relative time
700 * the other users can be over quota for this file system.
701 * If it is zero a default is used. Ditto for the default
702 * soft and hard limit values (already done, above), and
703 * for warnings.
704 */
705 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
706 q->qi_btimelimit = newlim->d_btimer;
707 ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
708 }
709 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
710 q->qi_itimelimit = newlim->d_itimer;
711 ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
712 }
713 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
714 q->qi_rtbtimelimit = newlim->d_rtbtimer;
715 ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
716 }
717 if (newlim->d_fieldmask & FS_DQ_BWARNS)
718 q->qi_bwarnlimit = newlim->d_bwarns;
719 if (newlim->d_fieldmask & FS_DQ_IWARNS)
720 q->qi_iwarnlimit = newlim->d_iwarns;
721 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
722 q->qi_rtbwarnlimit = newlim->d_rtbwarns;
723 } else {
724 /*
725 * If the user is now over quota, start the timelimit.
726 * The user will not be 'warned'.
727 * Note that we keep the timers ticking, whether enforcement
728 * is on or off. We don't really want to bother with iterating
729 * over all ondisk dquots and turning the timers on/off.
730 */
731 xfs_qm_adjust_dqtimers(mp, ddq);
732 }
733 dqp->dq_flags |= XFS_DQ_DIRTY;
734 xfs_trans_log_dquot(tp, dqp);
735
736 error = xfs_trans_commit(tp, 0);
737
738out_rele:
739 xfs_qm_dqrele(dqp);
740out_unlock:
741 mutex_unlock(&q->qi_quotaofflock);
742 return error;
743}
744
745STATIC int
746xfs_qm_log_quotaoff_end(
747 xfs_mount_t *mp,
748 xfs_qoff_logitem_t *startqoff,
749 uint flags)
750{
751 xfs_trans_t *tp;
752 int error;
753 xfs_qoff_logitem_t *qoffi;
754
755 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
756
757 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_equotaoff, 0, 0);
758 if (error) {
759 xfs_trans_cancel(tp, 0);
760 return (error);
761 }
762
763 qoffi = xfs_trans_get_qoff_item(tp, startqoff,
764 flags & XFS_ALL_QUOTA_ACCT);
765 xfs_trans_log_quotaoff_item(tp, qoffi);
766
767 /*
768 * We have to make sure that the transaction is secure on disk before we
769 * return and actually stop quota accounting. So, make it synchronous.
770 * We don't care about quotoff's performance.
771 */
772 xfs_trans_set_sync(tp);
773 error = xfs_trans_commit(tp, 0);
774 return (error);
775}
776
777
778STATIC int
779xfs_qm_log_quotaoff(
780 xfs_mount_t *mp,
781 xfs_qoff_logitem_t **qoffstartp,
782 uint flags)
783{
784 xfs_trans_t *tp;
785 int error;
786 xfs_qoff_logitem_t *qoffi=NULL;
787 uint oldsbqflag=0;
788
789 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
790 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_quotaoff, 0, 0);
791 if (error)
792 goto error0;
793
794 qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
795 xfs_trans_log_quotaoff_item(tp, qoffi);
796
797 spin_lock(&mp->m_sb_lock);
798 oldsbqflag = mp->m_sb.sb_qflags;
799 mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
800 spin_unlock(&mp->m_sb_lock);
801
802 xfs_mod_sb(tp, XFS_SB_QFLAGS);
803
804 /*
805 * We have to make sure that the transaction is secure on disk before we
806 * return and actually stop quota accounting. So, make it synchronous.
807 * We don't care about quotoff's performance.
808 */
809 xfs_trans_set_sync(tp);
810 error = xfs_trans_commit(tp, 0);
811
812error0:
813 if (error) {
814 xfs_trans_cancel(tp, 0);
815 /*
816 * No one else is modifying sb_qflags, so this is OK.
817 * We still hold the quotaofflock.
818 */
819 spin_lock(&mp->m_sb_lock);
820 mp->m_sb.sb_qflags = oldsbqflag;
821 spin_unlock(&mp->m_sb_lock);
822 }
823 *qoffstartp = qoffi;
824 return (error);
825}
826
827
828int
829xfs_qm_scall_getquota(
830 struct xfs_mount *mp,
831 xfs_dqid_t id,
832 uint type,
833 struct fs_disk_quota *dst)
834{
835 struct xfs_dquot *dqp;
836 int error;
837
838 /*
839 * Try to get the dquot. We don't want it allocated on disk, so
840 * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
841 * exist, we'll get ENOENT back.
842 */
843 error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp);
844 if (error)
845 return error;
846
847 /*
848 * If everything's NULL, this dquot doesn't quite exist as far as
849 * our utility programs are concerned.
850 */
851 if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
852 error = XFS_ERROR(ENOENT);
853 goto out_put;
854 }
855
856 memset(dst, 0, sizeof(*dst));
857 dst->d_version = FS_DQUOT_VERSION;
858 dst->d_flags = xfs_qm_export_qtype_flags(dqp->q_core.d_flags);
859 dst->d_id = be32_to_cpu(dqp->q_core.d_id);
860 dst->d_blk_hardlimit =
861 XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_blk_hardlimit));
862 dst->d_blk_softlimit =
863 XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_blk_softlimit));
864 dst->d_ino_hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
865 dst->d_ino_softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
866 dst->d_bcount = XFS_FSB_TO_BB(mp, dqp->q_res_bcount);
867 dst->d_icount = dqp->q_res_icount;
868 dst->d_btimer = be32_to_cpu(dqp->q_core.d_btimer);
869 dst->d_itimer = be32_to_cpu(dqp->q_core.d_itimer);
870 dst->d_iwarns = be16_to_cpu(dqp->q_core.d_iwarns);
871 dst->d_bwarns = be16_to_cpu(dqp->q_core.d_bwarns);
872 dst->d_rtb_hardlimit =
873 XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_rtb_hardlimit));
874 dst->d_rtb_softlimit =
875 XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_rtb_softlimit));
876 dst->d_rtbcount = XFS_FSB_TO_BB(mp, dqp->q_res_rtbcount);
877 dst->d_rtbtimer = be32_to_cpu(dqp->q_core.d_rtbtimer);
878 dst->d_rtbwarns = be16_to_cpu(dqp->q_core.d_rtbwarns);
879
880 /*
881 * Internally, we don't reset all the timers when quota enforcement
882 * gets turned off. No need to confuse the user level code,
883 * so return zeroes in that case.
884 */
885 if ((!XFS_IS_UQUOTA_ENFORCED(mp) &&
886 dqp->q_core.d_flags == XFS_DQ_USER) ||
887 (!XFS_IS_GQUOTA_ENFORCED(mp) &&
888 dqp->q_core.d_flags == XFS_DQ_GROUP) ||
889 (!XFS_IS_PQUOTA_ENFORCED(mp) &&
890 dqp->q_core.d_flags == XFS_DQ_PROJ)) {
891 dst->d_btimer = 0;
892 dst->d_itimer = 0;
893 dst->d_rtbtimer = 0;
894 }
895
896#ifdef DEBUG
897 if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == FS_USER_QUOTA) ||
898 (XFS_IS_GQUOTA_ENFORCED(mp) && dst->d_flags == FS_GROUP_QUOTA) ||
899 (XFS_IS_PQUOTA_ENFORCED(mp) && dst->d_flags == FS_PROJ_QUOTA)) &&
900 dst->d_id != 0) {
901 if ((dst->d_bcount > dst->d_blk_softlimit) &&
902 (dst->d_blk_softlimit > 0)) {
903 ASSERT(dst->d_btimer != 0);
904 }
905 if ((dst->d_icount > dst->d_ino_softlimit) &&
906 (dst->d_ino_softlimit > 0)) {
907 ASSERT(dst->d_itimer != 0);
908 }
909 }
910#endif
911out_put:
912 xfs_qm_dqput(dqp);
913 return error;
914}
915
916STATIC uint
917xfs_qm_export_qtype_flags(
918 uint flags)
919{
920 /*
921 * Can't be more than one, or none.
922 */
923 ASSERT((flags & (FS_PROJ_QUOTA | FS_USER_QUOTA)) !=
924 (FS_PROJ_QUOTA | FS_USER_QUOTA));
925 ASSERT((flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)) !=
926 (FS_PROJ_QUOTA | FS_GROUP_QUOTA));
927 ASSERT((flags & (FS_USER_QUOTA | FS_GROUP_QUOTA)) !=
928 (FS_USER_QUOTA | FS_GROUP_QUOTA));
929 ASSERT((flags & (FS_PROJ_QUOTA|FS_USER_QUOTA|FS_GROUP_QUOTA)) != 0);
930
931 return (flags & XFS_DQ_USER) ?
932 FS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
933 FS_PROJ_QUOTA : FS_GROUP_QUOTA;
934}
935
936STATIC uint
937xfs_qm_export_flags(
938 uint flags)
939{
940 uint uflags;
941
942 uflags = 0;
943 if (flags & XFS_UQUOTA_ACCT)
944 uflags |= FS_QUOTA_UDQ_ACCT;
945 if (flags & XFS_GQUOTA_ACCT)
946 uflags |= FS_QUOTA_GDQ_ACCT;
947 if (flags & XFS_PQUOTA_ACCT)
948 uflags |= FS_QUOTA_PDQ_ACCT;
949 if (flags & XFS_UQUOTA_ENFD)
950 uflags |= FS_QUOTA_UDQ_ENFD;
951 if (flags & XFS_GQUOTA_ENFD)
952 uflags |= FS_QUOTA_GDQ_ENFD;
953 if (flags & XFS_PQUOTA_ENFD)
954 uflags |= FS_QUOTA_PDQ_ENFD;
955 return (uflags);
956}
957
958
959STATIC int
960xfs_dqrele_inode(
961 struct xfs_inode *ip,
962 struct xfs_perag *pag,
963 int flags,
964 void *args)
965{
966 /* skip quota inodes */
967 if (ip == ip->i_mount->m_quotainfo->qi_uquotaip ||
968 ip == ip->i_mount->m_quotainfo->qi_gquotaip ||
969 ip == ip->i_mount->m_quotainfo->qi_pquotaip) {
970 ASSERT(ip->i_udquot == NULL);
971 ASSERT(ip->i_gdquot == NULL);
972 ASSERT(ip->i_pdquot == NULL);
973 return 0;
974 }
975
976 xfs_ilock(ip, XFS_ILOCK_EXCL);
977 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
978 xfs_qm_dqrele(ip->i_udquot);
979 ip->i_udquot = NULL;
980 }
981 if ((flags & XFS_GQUOTA_ACCT) && ip->i_gdquot) {
982 xfs_qm_dqrele(ip->i_gdquot);
983 ip->i_gdquot = NULL;
984 }
985 if ((flags & XFS_PQUOTA_ACCT) && ip->i_pdquot) {
986 xfs_qm_dqrele(ip->i_pdquot);
987 ip->i_pdquot = NULL;
988 }
989 xfs_iunlock(ip, XFS_ILOCK_EXCL);
990 return 0;
991}
992
993
994/*
995 * Go thru all the inodes in the file system, releasing their dquots.
996 *
997 * Note that the mount structure gets modified to indicate that quotas are off
998 * AFTER this, in the case of quotaoff.
999 */
1000void
1001xfs_qm_dqrele_all_inodes(
1002 struct xfs_mount *mp,
1003 uint flags)
1004{
1005 ASSERT(mp->m_quotainfo);
1006 xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags, NULL);
1007}