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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// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6
7
8#include "xfs.h"
9#include "xfs_fs.h"
10#include "xfs_shared.h"
11#include "xfs_format.h"
12#include "xfs_log_format.h"
13#include "xfs_trans_resv.h"
14#include "xfs_sb.h"
15#include "xfs_mount.h"
16#include "xfs_inode.h"
17#include "xfs_trans.h"
18#include "xfs_quota.h"
19#include "xfs_qm.h"
20#include "xfs_icache.h"
21
22int
23xfs_qm_scall_quotaoff(
24 xfs_mount_t *mp,
25 uint flags)
26{
27 /*
28 * No file system can have quotas enabled on disk but not in core.
29 * Note that quota utilities (like quotaoff) _expect_
30 * errno == -EEXIST here.
31 */
32 if ((mp->m_qflags & flags) == 0)
33 return -EEXIST;
34
35 /*
36 * We do not support actually turning off quota accounting any more.
37 * Just log a warning and ignore the accounting related flags.
38 */
39 if (flags & XFS_ALL_QUOTA_ACCT)
40 xfs_info(mp, "disabling of quota accounting not supported.");
41
42 mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
43 mp->m_qflags &= ~(flags & XFS_ALL_QUOTA_ENFD);
44 spin_lock(&mp->m_sb_lock);
45 mp->m_sb.sb_qflags = mp->m_qflags;
46 spin_unlock(&mp->m_sb_lock);
47 mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
48
49 /* XXX what to do if error ? Revert back to old vals incore ? */
50 return xfs_sync_sb(mp, false);
51}
52
53STATIC int
54xfs_qm_scall_trunc_qfile(
55 struct xfs_mount *mp,
56 xfs_dqtype_t type)
57{
58 struct xfs_inode *ip;
59 struct xfs_trans *tp;
60 int error;
61
62 error = xfs_qm_qino_load(mp, type, &ip);
63 if (error == -ENOENT)
64 return 0;
65 if (error)
66 return error;
67
68 xfs_ilock(ip, XFS_IOLOCK_EXCL);
69
70 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
71 if (error) {
72 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
73 goto out_put;
74 }
75
76 xfs_ilock(ip, XFS_ILOCK_EXCL);
77 xfs_trans_ijoin(tp, ip, 0);
78
79 ip->i_disk_size = 0;
80 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
81
82 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0);
83 if (error) {
84 xfs_trans_cancel(tp);
85 goto out_unlock;
86 }
87
88 ASSERT(ip->i_df.if_nextents == 0);
89
90 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
91 error = xfs_trans_commit(tp);
92
93out_unlock:
94 xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
95out_put:
96 xfs_irele(ip);
97 return error;
98}
99
100int
101xfs_qm_scall_trunc_qfiles(
102 xfs_mount_t *mp,
103 uint flags)
104{
105 int error = -EINVAL;
106
107 if (!xfs_has_quota(mp) || flags == 0 ||
108 (flags & ~XFS_QMOPT_QUOTALL)) {
109 xfs_debug(mp, "%s: flags=%x m_qflags=%x",
110 __func__, flags, mp->m_qflags);
111 return -EINVAL;
112 }
113
114 if (flags & XFS_QMOPT_UQUOTA) {
115 error = xfs_qm_scall_trunc_qfile(mp, XFS_DQTYPE_USER);
116 if (error)
117 return error;
118 }
119 if (flags & XFS_QMOPT_GQUOTA) {
120 error = xfs_qm_scall_trunc_qfile(mp, XFS_DQTYPE_GROUP);
121 if (error)
122 return error;
123 }
124 if (flags & XFS_QMOPT_PQUOTA)
125 error = xfs_qm_scall_trunc_qfile(mp, XFS_DQTYPE_PROJ);
126
127 return error;
128}
129
130/*
131 * Switch on (a given) quota enforcement for a filesystem. This takes
132 * effect immediately.
133 * (Switching on quota accounting must be done at mount time.)
134 */
135int
136xfs_qm_scall_quotaon(
137 xfs_mount_t *mp,
138 uint flags)
139{
140 int error;
141 uint qf;
142
143 /*
144 * Switching on quota accounting must be done at mount time,
145 * only consider quota enforcement stuff here.
146 */
147 flags &= XFS_ALL_QUOTA_ENFD;
148
149 if (flags == 0) {
150 xfs_debug(mp, "%s: zero flags, m_qflags=%x",
151 __func__, mp->m_qflags);
152 return -EINVAL;
153 }
154
155 /*
156 * Can't enforce without accounting. We check the superblock
157 * qflags here instead of m_qflags because rootfs can have
158 * quota acct on ondisk without m_qflags' knowing.
159 */
160 if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
161 (flags & XFS_UQUOTA_ENFD)) ||
162 ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
163 (flags & XFS_GQUOTA_ENFD)) ||
164 ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
165 (flags & XFS_PQUOTA_ENFD))) {
166 xfs_debug(mp,
167 "%s: Can't enforce without acct, flags=%x sbflags=%x",
168 __func__, flags, mp->m_sb.sb_qflags);
169 return -EINVAL;
170 }
171 /*
172 * If everything's up to-date incore, then don't waste time.
173 */
174 if ((mp->m_qflags & flags) == flags)
175 return -EEXIST;
176
177 /*
178 * Change sb_qflags on disk but not incore mp->qflags
179 * if this is the root filesystem.
180 */
181 spin_lock(&mp->m_sb_lock);
182 qf = mp->m_sb.sb_qflags;
183 mp->m_sb.sb_qflags = qf | flags;
184 spin_unlock(&mp->m_sb_lock);
185
186 /*
187 * There's nothing to change if it's the same.
188 */
189 if ((qf & flags) == flags)
190 return -EEXIST;
191
192 error = xfs_sync_sb(mp, false);
193 if (error)
194 return error;
195 /*
196 * If we aren't trying to switch on quota enforcement, we are done.
197 */
198 if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
199 (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
200 ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
201 (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
202 ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
203 (mp->m_qflags & XFS_GQUOTA_ACCT)))
204 return 0;
205
206 if (!XFS_IS_QUOTA_ON(mp))
207 return -ESRCH;
208
209 /*
210 * Switch on quota enforcement in core.
211 */
212 mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
213 mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
214 mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
215
216 return 0;
217}
218
219#define XFS_QC_MASK (QC_LIMIT_MASK | QC_TIMER_MASK)
220
221/*
222 * Adjust limits of this quota, and the defaults if passed in. Returns true
223 * if the new limits made sense and were applied, false otherwise.
224 */
225static inline bool
226xfs_setqlim_limits(
227 struct xfs_mount *mp,
228 struct xfs_dquot_res *res,
229 struct xfs_quota_limits *qlim,
230 xfs_qcnt_t hard,
231 xfs_qcnt_t soft,
232 const char *tag)
233{
234 /* The hard limit can't be less than the soft limit. */
235 if (hard != 0 && hard < soft) {
236 xfs_debug(mp, "%shard %lld < %ssoft %lld", tag, hard, tag,
237 soft);
238 return false;
239 }
240
241 res->hardlimit = hard;
242 res->softlimit = soft;
243 if (qlim) {
244 qlim->hard = hard;
245 qlim->soft = soft;
246 }
247
248 return true;
249}
250
251static inline void
252xfs_setqlim_timer(
253 struct xfs_mount *mp,
254 struct xfs_dquot_res *res,
255 struct xfs_quota_limits *qlim,
256 s64 timer)
257{
258 if (qlim) {
259 /* Set the length of the default grace period. */
260 res->timer = xfs_dquot_set_grace_period(timer);
261 qlim->time = res->timer;
262 } else {
263 /* Set the grace period expiration on a quota. */
264 res->timer = xfs_dquot_set_timeout(mp, timer);
265 }
266}
267
268/*
269 * Adjust quota limits, and start/stop timers accordingly.
270 */
271int
272xfs_qm_scall_setqlim(
273 struct xfs_mount *mp,
274 xfs_dqid_t id,
275 xfs_dqtype_t type,
276 struct qc_dqblk *newlim)
277{
278 struct xfs_quotainfo *q = mp->m_quotainfo;
279 struct xfs_dquot *dqp;
280 struct xfs_trans *tp;
281 struct xfs_def_quota *defq;
282 struct xfs_dquot_res *res;
283 struct xfs_quota_limits *qlim;
284 int error;
285 xfs_qcnt_t hard, soft;
286
287 if (newlim->d_fieldmask & ~XFS_QC_MASK)
288 return -EINVAL;
289 if ((newlim->d_fieldmask & XFS_QC_MASK) == 0)
290 return 0;
291
292 /*
293 * Get the dquot (locked) before we start, as we need to do a
294 * transaction to allocate it if it doesn't exist. Once we have the
295 * dquot, unlock it so we can start the next transaction safely. We hold
296 * a reference to the dquot, so it's safe to do this unlock/lock without
297 * it being reclaimed in the mean time.
298 */
299 error = xfs_qm_dqget(mp, id, type, true, &dqp);
300 if (error) {
301 ASSERT(error != -ENOENT);
302 return error;
303 }
304
305 defq = xfs_get_defquota(q, xfs_dquot_type(dqp));
306 xfs_dqunlock(dqp);
307
308 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_qm_setqlim, 0, 0, 0, &tp);
309 if (error)
310 goto out_rele;
311
312 xfs_dqlock(dqp);
313 xfs_trans_dqjoin(tp, dqp);
314
315 /*
316 * Update quota limits, warnings, and timers, and the defaults
317 * if we're touching id == 0.
318 *
319 * Make sure that hardlimits are >= soft limits before changing.
320 *
321 * Update warnings counter(s) if requested.
322 *
323 * Timelimits for the super user set the relative time the other users
324 * can be over quota for this file system. If it is zero a default is
325 * used. Ditto for the default soft and hard limit values (already
326 * done, above), and for warnings.
327 *
328 * For other IDs, userspace can bump out the grace period if over
329 * the soft limit.
330 */
331
332 /* Blocks on the data device. */
333 hard = (newlim->d_fieldmask & QC_SPC_HARD) ?
334 (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_hardlimit) :
335 dqp->q_blk.hardlimit;
336 soft = (newlim->d_fieldmask & QC_SPC_SOFT) ?
337 (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_softlimit) :
338 dqp->q_blk.softlimit;
339 res = &dqp->q_blk;
340 qlim = id == 0 ? &defq->blk : NULL;
341
342 if (xfs_setqlim_limits(mp, res, qlim, hard, soft, "blk"))
343 xfs_dquot_set_prealloc_limits(dqp);
344 if (newlim->d_fieldmask & QC_SPC_TIMER)
345 xfs_setqlim_timer(mp, res, qlim, newlim->d_spc_timer);
346
347 /* Blocks on the realtime device. */
348 hard = (newlim->d_fieldmask & QC_RT_SPC_HARD) ?
349 (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_hardlimit) :
350 dqp->q_rtb.hardlimit;
351 soft = (newlim->d_fieldmask & QC_RT_SPC_SOFT) ?
352 (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_softlimit) :
353 dqp->q_rtb.softlimit;
354 res = &dqp->q_rtb;
355 qlim = id == 0 ? &defq->rtb : NULL;
356
357 xfs_setqlim_limits(mp, res, qlim, hard, soft, "rtb");
358 if (newlim->d_fieldmask & QC_RT_SPC_TIMER)
359 xfs_setqlim_timer(mp, res, qlim, newlim->d_rt_spc_timer);
360
361 /* Inodes */
362 hard = (newlim->d_fieldmask & QC_INO_HARD) ?
363 (xfs_qcnt_t) newlim->d_ino_hardlimit :
364 dqp->q_ino.hardlimit;
365 soft = (newlim->d_fieldmask & QC_INO_SOFT) ?
366 (xfs_qcnt_t) newlim->d_ino_softlimit :
367 dqp->q_ino.softlimit;
368 res = &dqp->q_ino;
369 qlim = id == 0 ? &defq->ino : NULL;
370
371 xfs_setqlim_limits(mp, res, qlim, hard, soft, "ino");
372 if (newlim->d_fieldmask & QC_INO_TIMER)
373 xfs_setqlim_timer(mp, res, qlim, newlim->d_ino_timer);
374
375 if (id != 0) {
376 /*
377 * If the user is now over quota, start the timelimit.
378 * The user will not be 'warned'.
379 * Note that we keep the timers ticking, whether enforcement
380 * is on or off. We don't really want to bother with iterating
381 * over all ondisk dquots and turning the timers on/off.
382 */
383 xfs_qm_adjust_dqtimers(dqp);
384 }
385 dqp->q_flags |= XFS_DQFLAG_DIRTY;
386 xfs_trans_log_dquot(tp, dqp);
387
388 error = xfs_trans_commit(tp);
389
390out_rele:
391 xfs_qm_dqrele(dqp);
392 return error;
393}
394
395/* Fill out the quota context. */
396static void
397xfs_qm_scall_getquota_fill_qc(
398 struct xfs_mount *mp,
399 xfs_dqtype_t type,
400 const struct xfs_dquot *dqp,
401 struct qc_dqblk *dst)
402{
403 memset(dst, 0, sizeof(*dst));
404 dst->d_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_blk.hardlimit);
405 dst->d_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_blk.softlimit);
406 dst->d_ino_hardlimit = dqp->q_ino.hardlimit;
407 dst->d_ino_softlimit = dqp->q_ino.softlimit;
408 dst->d_space = XFS_FSB_TO_B(mp, dqp->q_blk.reserved);
409 dst->d_ino_count = dqp->q_ino.reserved;
410 dst->d_spc_timer = dqp->q_blk.timer;
411 dst->d_ino_timer = dqp->q_ino.timer;
412 dst->d_ino_warns = 0;
413 dst->d_spc_warns = 0;
414 dst->d_rt_spc_hardlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.hardlimit);
415 dst->d_rt_spc_softlimit = XFS_FSB_TO_B(mp, dqp->q_rtb.softlimit);
416 dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_rtb.reserved);
417 dst->d_rt_spc_timer = dqp->q_rtb.timer;
418 dst->d_rt_spc_warns = 0;
419
420 /*
421 * Internally, we don't reset all the timers when quota enforcement
422 * gets turned off. No need to confuse the user level code,
423 * so return zeroes in that case.
424 */
425 if (!xfs_dquot_is_enforced(dqp)) {
426 dst->d_spc_timer = 0;
427 dst->d_ino_timer = 0;
428 dst->d_rt_spc_timer = 0;
429 }
430}
431
432/* Return the quota information for the dquot matching id. */
433int
434xfs_qm_scall_getquota(
435 struct xfs_mount *mp,
436 xfs_dqid_t id,
437 xfs_dqtype_t type,
438 struct qc_dqblk *dst)
439{
440 struct xfs_dquot *dqp;
441 int error;
442
443 /*
444 * Expedite pending inodegc work at the start of a quota reporting
445 * scan but don't block waiting for it to complete.
446 */
447 if (id == 0)
448 xfs_inodegc_push(mp);
449
450 /*
451 * Try to get the dquot. We don't want it allocated on disk, so don't
452 * set doalloc. If it doesn't exist, we'll get ENOENT back.
453 */
454 error = xfs_qm_dqget(mp, id, type, false, &dqp);
455 if (error)
456 return error;
457
458 /*
459 * If everything's NULL, this dquot doesn't quite exist as far as
460 * our utility programs are concerned.
461 */
462 if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
463 error = -ENOENT;
464 goto out_put;
465 }
466
467 xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst);
468
469out_put:
470 xfs_qm_dqput(dqp);
471 return error;
472}
473
474/*
475 * Return the quota information for the first initialized dquot whose id
476 * is at least as high as id.
477 */
478int
479xfs_qm_scall_getquota_next(
480 struct xfs_mount *mp,
481 xfs_dqid_t *id,
482 xfs_dqtype_t type,
483 struct qc_dqblk *dst)
484{
485 struct xfs_dquot *dqp;
486 int error;
487
488 /* Flush inodegc work at the start of a quota reporting scan. */
489 if (*id == 0)
490 xfs_inodegc_push(mp);
491
492 error = xfs_qm_dqget_next(mp, *id, type, &dqp);
493 if (error)
494 return error;
495
496 /* Fill in the ID we actually read from disk */
497 *id = dqp->q_id;
498
499 xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst);
500
501 xfs_qm_dqput(dqp);
502 return error;
503}