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