Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
[pandora-kernel.git] / fs / xfs / quota / 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_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
44 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
45 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
46                                         uint);
47 STATIC uint     xfs_qm_export_flags(uint);
48 STATIC uint     xfs_qm_export_qtype_flags(uint);
49 STATIC 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  */
61 int
62 xfs_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
230 out_unlock:
231         mutex_unlock(&q->qi_quotaofflock);
232         return error;
233 }
234
235 STATIC int
236 xfs_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_finish(&tp, ip, 0, XFS_DATA_FORK, 1);
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
276 out_unlock:
277         xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
278 out_put:
279         IRELE(ip);
280         return error;
281 }
282
283 int
284 xfs_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  */
309 int
310 xfs_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  */
407 int
408 xfs_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  */
476 int
477 xfs_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_dqprint(dqp);
626         xfs_qm_dqrele(dqp);
627
628  out_unlock:
629         mutex_unlock(&q->qi_quotaofflock);
630         return error;
631 }
632
633 int
634 xfs_qm_scall_getquota(
635         xfs_mount_t     *mp,
636         xfs_dqid_t      id,
637         uint            type,
638         fs_disk_quota_t *out)
639 {
640         xfs_dquot_t     *dqp;
641         int             error;
642
643         /*
644          * Try to get the dquot. We don't want it allocated on disk, so
645          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
646          * exist, we'll get ENOENT back.
647          */
648         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
649                 return (error);
650         }
651
652         /*
653          * If everything's NULL, this dquot doesn't quite exist as far as
654          * our utility programs are concerned.
655          */
656         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
657                 xfs_qm_dqput(dqp);
658                 return XFS_ERROR(ENOENT);
659         }
660         /* xfs_qm_dqprint(dqp); */
661         /*
662          * Convert the disk dquot to the exportable format
663          */
664         xfs_qm_export_dquot(mp, &dqp->q_core, out);
665         xfs_qm_dqput(dqp);
666         return (error ? XFS_ERROR(EFAULT) : 0);
667 }
668
669
670 STATIC int
671 xfs_qm_log_quotaoff_end(
672         xfs_mount_t             *mp,
673         xfs_qoff_logitem_t      *startqoff,
674         uint                    flags)
675 {
676         xfs_trans_t             *tp;
677         int                     error;
678         xfs_qoff_logitem_t      *qoffi;
679
680         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
681
682         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
683                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
684                 xfs_trans_cancel(tp, 0);
685                 return (error);
686         }
687
688         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
689                                         flags & XFS_ALL_QUOTA_ACCT);
690         xfs_trans_log_quotaoff_item(tp, qoffi);
691
692         /*
693          * We have to make sure that the transaction is secure on disk before we
694          * return and actually stop quota accounting. So, make it synchronous.
695          * We don't care about quotoff's performance.
696          */
697         xfs_trans_set_sync(tp);
698         error = xfs_trans_commit(tp, 0);
699         return (error);
700 }
701
702
703 STATIC int
704 xfs_qm_log_quotaoff(
705         xfs_mount_t            *mp,
706         xfs_qoff_logitem_t     **qoffstartp,
707         uint                   flags)
708 {
709         xfs_trans_t            *tp;
710         int                     error;
711         xfs_qoff_logitem_t     *qoffi=NULL;
712         uint                    oldsbqflag=0;
713
714         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
715         if ((error = xfs_trans_reserve(tp, 0,
716                                       sizeof(xfs_qoff_logitem_t) * 2 +
717                                       mp->m_sb.sb_sectsize + 128,
718                                       0,
719                                       0,
720                                       XFS_DEFAULT_LOG_COUNT))) {
721                 goto error0;
722         }
723
724         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
725         xfs_trans_log_quotaoff_item(tp, qoffi);
726
727         spin_lock(&mp->m_sb_lock);
728         oldsbqflag = mp->m_sb.sb_qflags;
729         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
730         spin_unlock(&mp->m_sb_lock);
731
732         xfs_mod_sb(tp, XFS_SB_QFLAGS);
733
734         /*
735          * We have to make sure that the transaction is secure on disk before we
736          * return and actually stop quota accounting. So, make it synchronous.
737          * We don't care about quotoff's performance.
738          */
739         xfs_trans_set_sync(tp);
740         error = xfs_trans_commit(tp, 0);
741
742 error0:
743         if (error) {
744                 xfs_trans_cancel(tp, 0);
745                 /*
746                  * No one else is modifying sb_qflags, so this is OK.
747                  * We still hold the quotaofflock.
748                  */
749                 spin_lock(&mp->m_sb_lock);
750                 mp->m_sb.sb_qflags = oldsbqflag;
751                 spin_unlock(&mp->m_sb_lock);
752         }
753         *qoffstartp = qoffi;
754         return (error);
755 }
756
757
758 /*
759  * Translate an internal style on-disk-dquot to the exportable format.
760  * The main differences are that the counters/limits are all in Basic
761  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
762  * to be converted to the native endianness.
763  */
764 STATIC void
765 xfs_qm_export_dquot(
766         xfs_mount_t             *mp,
767         xfs_disk_dquot_t        *src,
768         struct fs_disk_quota    *dst)
769 {
770         memset(dst, 0, sizeof(*dst));
771         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
772         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
773         dst->d_id = be32_to_cpu(src->d_id);
774         dst->d_blk_hardlimit =
775                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
776         dst->d_blk_softlimit =
777                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
778         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
779         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
780         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
781         dst->d_icount = be64_to_cpu(src->d_icount);
782         dst->d_btimer = be32_to_cpu(src->d_btimer);
783         dst->d_itimer = be32_to_cpu(src->d_itimer);
784         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
785         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
786         dst->d_rtb_hardlimit =
787                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
788         dst->d_rtb_softlimit =
789                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
790         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
791         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
792         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
793
794         /*
795          * Internally, we don't reset all the timers when quota enforcement
796          * gets turned off. No need to confuse the user level code,
797          * so return zeroes in that case.
798          */
799         if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
800             (!XFS_IS_OQUOTA_ENFORCED(mp) &&
801                         (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
802                 dst->d_btimer = 0;
803                 dst->d_itimer = 0;
804                 dst->d_rtbtimer = 0;
805         }
806
807 #ifdef DEBUG
808         if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == FS_USER_QUOTA) ||
809              (XFS_IS_OQUOTA_ENFORCED(mp) &&
810                         (dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) &&
811             dst->d_id != 0) {
812                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
813                     (dst->d_blk_softlimit > 0)) {
814                         ASSERT(dst->d_btimer != 0);
815                 }
816                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
817                     (dst->d_ino_softlimit > 0)) {
818                         ASSERT(dst->d_itimer != 0);
819                 }
820         }
821 #endif
822 }
823
824 STATIC uint
825 xfs_qm_export_qtype_flags(
826         uint flags)
827 {
828         /*
829          * Can't be more than one, or none.
830          */
831         ASSERT((flags & (FS_PROJ_QUOTA | FS_USER_QUOTA)) !=
832                 (FS_PROJ_QUOTA | FS_USER_QUOTA));
833         ASSERT((flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)) !=
834                 (FS_PROJ_QUOTA | FS_GROUP_QUOTA));
835         ASSERT((flags & (FS_USER_QUOTA | FS_GROUP_QUOTA)) !=
836                 (FS_USER_QUOTA | FS_GROUP_QUOTA));
837         ASSERT((flags & (FS_PROJ_QUOTA|FS_USER_QUOTA|FS_GROUP_QUOTA)) != 0);
838
839         return (flags & XFS_DQ_USER) ?
840                 FS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
841                         FS_PROJ_QUOTA : FS_GROUP_QUOTA;
842 }
843
844 STATIC uint
845 xfs_qm_export_flags(
846         uint flags)
847 {
848         uint uflags;
849
850         uflags = 0;
851         if (flags & XFS_UQUOTA_ACCT)
852                 uflags |= FS_QUOTA_UDQ_ACCT;
853         if (flags & XFS_PQUOTA_ACCT)
854                 uflags |= FS_QUOTA_PDQ_ACCT;
855         if (flags & XFS_GQUOTA_ACCT)
856                 uflags |= FS_QUOTA_GDQ_ACCT;
857         if (flags & XFS_UQUOTA_ENFD)
858                 uflags |= FS_QUOTA_UDQ_ENFD;
859         if (flags & (XFS_OQUOTA_ENFD)) {
860                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
861                         FS_QUOTA_GDQ_ENFD : FS_QUOTA_PDQ_ENFD;
862         }
863         return (uflags);
864 }
865
866
867 STATIC int
868 xfs_dqrele_inode(
869         struct xfs_inode        *ip,
870         struct xfs_perag        *pag,
871         int                     flags)
872 {
873         /* skip quota inodes */
874         if (ip == ip->i_mount->m_quotainfo->qi_uquotaip ||
875             ip == ip->i_mount->m_quotainfo->qi_gquotaip) {
876                 ASSERT(ip->i_udquot == NULL);
877                 ASSERT(ip->i_gdquot == NULL);
878                 return 0;
879         }
880
881         xfs_ilock(ip, XFS_ILOCK_EXCL);
882         if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
883                 xfs_qm_dqrele(ip->i_udquot);
884                 ip->i_udquot = NULL;
885         }
886         if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
887                 xfs_qm_dqrele(ip->i_gdquot);
888                 ip->i_gdquot = NULL;
889         }
890         xfs_iunlock(ip, XFS_ILOCK_EXCL);
891         return 0;
892 }
893
894
895 /*
896  * Go thru all the inodes in the file system, releasing their dquots.
897  *
898  * Note that the mount structure gets modified to indicate that quotas are off
899  * AFTER this, in the case of quotaoff.
900  */
901 void
902 xfs_qm_dqrele_all_inodes(
903         struct xfs_mount *mp,
904         uint             flags)
905 {
906         ASSERT(mp->m_quotainfo);
907         xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags);
908 }
909
910 /*------------------------------------------------------------------------*/
911 #ifdef DEBUG
912 /*
913  * This contains all the test functions for XFS disk quotas.
914  * Currently it does a quota accounting check. ie. it walks through
915  * all inodes in the file system, calculating the dquot accounting fields,
916  * and prints out any inconsistencies.
917  */
918 xfs_dqhash_t *qmtest_udqtab;
919 xfs_dqhash_t *qmtest_gdqtab;
920 int           qmtest_hashmask;
921 int           qmtest_nfails;
922 struct mutex  qcheck_lock;
923
924 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
925                                  (__psunsigned_t)(id)) & \
926                                 (qmtest_hashmask - 1))
927
928 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
929                                      (qmtest_udqtab + \
930                                       DQTEST_HASHVAL(mp, id)) : \
931                                      (qmtest_gdqtab + \
932                                       DQTEST_HASHVAL(mp, id)))
933
934 #define DQTEST_LIST_PRINT(l, NXT, title) \
935 { \
936           xfs_dqtest_t  *dqp; int i = 0;\
937           xfs_debug(NULL, "%s (#%d)", title, (int) (l)->qh_nelems); \
938           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
939                dqp = (xfs_dqtest_t *)dqp->NXT) { \
940                 xfs_debug(dqp->q_mount,         \
941                         "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
942                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
943                          dqp->d_bcount, dqp->d_icount); } \
944 }
945
946 typedef struct dqtest {
947         uint             dq_flags;      /* various flags (XFS_DQ_*) */
948         struct list_head q_hashlist;
949         xfs_dqhash_t    *q_hash;        /* the hashchain header */
950         xfs_mount_t     *q_mount;       /* filesystem this relates to */
951         xfs_dqid_t      d_id;           /* user id or group id */
952         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
953         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
954 } xfs_dqtest_t;
955
956 STATIC void
957 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
958 {
959         list_add(&dqp->q_hashlist, &h->qh_list);
960         h->qh_version++;
961         h->qh_nelems++;
962 }
963 STATIC void
964 xfs_qm_dqtest_print(
965         struct xfs_mount        *mp,
966         struct dqtest           *d)
967 {
968         xfs_debug(mp, "-----------DQTEST DQUOT----------------");
969         xfs_debug(mp, "---- dquot ID = %d", d->d_id);
970         xfs_debug(mp, "---- fs       = 0x%p", d->q_mount);
971         xfs_debug(mp, "---- bcount   = %Lu (0x%x)",
972                 d->d_bcount, (int)d->d_bcount);
973         xfs_debug(mp, "---- icount   = %Lu (0x%x)",
974                 d->d_icount, (int)d->d_icount);
975         xfs_debug(mp, "---------------------------");
976 }
977
978 STATIC void
979 xfs_qm_dqtest_failed(
980         xfs_dqtest_t    *d,
981         xfs_dquot_t     *dqp,
982         char            *reason,
983         xfs_qcnt_t      a,
984         xfs_qcnt_t      b,
985         int             error)
986 {
987         qmtest_nfails++;
988         if (error)
989                 xfs_debug(dqp->q_mount,
990                         "quotacheck failed id=%d, err=%d\nreason: %s",
991                         d->d_id, error, reason);
992         else
993                 xfs_debug(dqp->q_mount,
994                         "quotacheck failed id=%d (%s) [%d != %d]",
995                         d->d_id, reason, (int)a, (int)b);
996         xfs_qm_dqtest_print(dqp->q_mount, d);
997         if (dqp)
998                 xfs_qm_dqprint(dqp);
999 }
1000
1001 STATIC int
1002 xfs_dqtest_cmp2(
1003         xfs_dqtest_t    *d,
1004         xfs_dquot_t     *dqp)
1005 {
1006         int err = 0;
1007         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1008                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1009                         be64_to_cpu(dqp->q_core.d_icount),
1010                         d->d_icount, 0);
1011                 err++;
1012         }
1013         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1014                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1015                         be64_to_cpu(dqp->q_core.d_bcount),
1016                         d->d_bcount, 0);
1017                 err++;
1018         }
1019         if (dqp->q_core.d_blk_softlimit &&
1020             be64_to_cpu(dqp->q_core.d_bcount) >=
1021             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1022                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1023                         xfs_debug(dqp->q_mount,
1024                                 "%d [%s] BLK TIMER NOT STARTED",
1025                                 d->d_id, DQFLAGTO_TYPESTR(d));
1026                         err++;
1027                 }
1028         }
1029         if (dqp->q_core.d_ino_softlimit &&
1030             be64_to_cpu(dqp->q_core.d_icount) >=
1031             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1032                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1033                         xfs_debug(dqp->q_mount,
1034                                 "%d [%s] INO TIMER NOT STARTED",
1035                                 d->d_id, DQFLAGTO_TYPESTR(d));
1036                         err++;
1037                 }
1038         }
1039 #ifdef QUOTADEBUG
1040         if (!err) {
1041                 xfs_debug(dqp->q_mount, "%d [%s] qchecked",
1042                         d->d_id, DQFLAGTO_TYPESTR(d));
1043         }
1044 #endif
1045         return (err);
1046 }
1047
1048 STATIC void
1049 xfs_dqtest_cmp(
1050         xfs_dqtest_t    *d)
1051 {
1052         xfs_dquot_t     *dqp;
1053         int             error;
1054
1055         /* xfs_qm_dqtest_print(d); */
1056         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1057                                  &dqp))) {
1058                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1059                 return;
1060         }
1061         xfs_dqtest_cmp2(d, dqp);
1062         xfs_qm_dqput(dqp);
1063 }
1064
1065 STATIC int
1066 xfs_qm_internalqcheck_dqget(
1067         xfs_mount_t     *mp,
1068         xfs_dqid_t      id,
1069         uint            type,
1070         xfs_dqtest_t    **O_dq)
1071 {
1072         xfs_dqtest_t    *d;
1073         xfs_dqhash_t    *h;
1074
1075         h = DQTEST_HASH(mp, id, type);
1076         list_for_each_entry(d, &h->qh_list, q_hashlist) {
1077                 if (d->d_id == id && mp == d->q_mount) {
1078                         *O_dq = d;
1079                         return (0);
1080                 }
1081         }
1082         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1083         d->dq_flags = type;
1084         d->d_id = id;
1085         d->q_mount = mp;
1086         d->q_hash = h;
1087         INIT_LIST_HEAD(&d->q_hashlist);
1088         xfs_qm_hashinsert(h, d);
1089         *O_dq = d;
1090         return (0);
1091 }
1092
1093 STATIC void
1094 xfs_qm_internalqcheck_get_dquots(
1095         xfs_mount_t     *mp,
1096         xfs_dqid_t      uid,
1097         xfs_dqid_t      projid,
1098         xfs_dqid_t      gid,
1099         xfs_dqtest_t    **ud,
1100         xfs_dqtest_t    **gd)
1101 {
1102         if (XFS_IS_UQUOTA_ON(mp))
1103                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1104         if (XFS_IS_GQUOTA_ON(mp))
1105                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1106         else if (XFS_IS_PQUOTA_ON(mp))
1107                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1108 }
1109
1110
1111 STATIC void
1112 xfs_qm_internalqcheck_dqadjust(
1113         xfs_inode_t             *ip,
1114         xfs_dqtest_t            *d)
1115 {
1116         d->d_icount++;
1117         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1118 }
1119
1120 STATIC int
1121 xfs_qm_internalqcheck_adjust(
1122         xfs_mount_t     *mp,            /* mount point for filesystem */
1123         xfs_ino_t       ino,            /* inode number to get data for */
1124         void            __user *buffer, /* not used */
1125         int             ubsize,         /* not used */
1126         int             *ubused,        /* not used */
1127         int             *res)           /* bulkstat result code */
1128 {
1129         xfs_inode_t             *ip;
1130         xfs_dqtest_t            *ud, *gd;
1131         uint                    lock_flags;
1132         boolean_t               ipreleased;
1133         int                     error;
1134
1135         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1136
1137         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1138                 *res = BULKSTAT_RV_NOTHING;
1139                 xfs_debug(mp, "%s: ino=%llu, uqino=%llu, gqino=%llu\n",
1140                         __func__, (unsigned long long) ino,
1141                         (unsigned long long) mp->m_sb.sb_uquotino,
1142                         (unsigned long long) mp->m_sb.sb_gquotino);
1143                 return XFS_ERROR(EINVAL);
1144         }
1145         ipreleased = B_FALSE;
1146  again:
1147         lock_flags = XFS_ILOCK_SHARED;
1148         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip))) {
1149                 *res = BULKSTAT_RV_NOTHING;
1150                 return (error);
1151         }
1152
1153         /*
1154          * This inode can have blocks after eof which can get released
1155          * when we send it to inactive. Since we don't check the dquot
1156          * until the after all our calculations are done, we must get rid
1157          * of those now.
1158          */
1159         if (! ipreleased) {
1160                 xfs_iunlock(ip, lock_flags);
1161                 IRELE(ip);
1162                 ipreleased = B_TRUE;
1163                 goto again;
1164         }
1165         xfs_qm_internalqcheck_get_dquots(mp,
1166                                         (xfs_dqid_t) ip->i_d.di_uid,
1167                                         (xfs_dqid_t) xfs_get_projid(ip),
1168                                         (xfs_dqid_t) ip->i_d.di_gid,
1169                                         &ud, &gd);
1170         if (XFS_IS_UQUOTA_ON(mp)) {
1171                 ASSERT(ud);
1172                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1173         }
1174         if (XFS_IS_OQUOTA_ON(mp)) {
1175                 ASSERT(gd);
1176                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1177         }
1178         xfs_iunlock(ip, lock_flags);
1179         IRELE(ip);
1180         *res = BULKSTAT_RV_DIDONE;
1181         return (0);
1182 }
1183
1184
1185 /* PRIVATE, debugging */
1186 int
1187 xfs_qm_internalqcheck(
1188         xfs_mount_t     *mp)
1189 {
1190         xfs_ino_t       lastino;
1191         int             done, count;
1192         int             i;
1193         int             error;
1194
1195         lastino = 0;
1196         qmtest_hashmask = 32;
1197         count = 5;
1198         done = 0;
1199         qmtest_nfails = 0;
1200
1201         if (! XFS_IS_QUOTA_ON(mp))
1202                 return XFS_ERROR(ESRCH);
1203
1204         xfs_log_force(mp, XFS_LOG_SYNC);
1205         XFS_bflush(mp->m_ddev_targp);
1206         xfs_log_force(mp, XFS_LOG_SYNC);
1207         XFS_bflush(mp->m_ddev_targp);
1208
1209         mutex_lock(&qcheck_lock);
1210         /* There should be absolutely no quota activity while this
1211            is going on. */
1212         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1213                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1214         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1215                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1216         do {
1217                 /*
1218                  * Iterate thru all the inodes in the file system,
1219                  * adjusting the corresponding dquot counters
1220                  */
1221                 error = xfs_bulkstat(mp, &lastino, &count,
1222                                  xfs_qm_internalqcheck_adjust,
1223                                  0, NULL, &done);
1224                 if (error) {
1225                         xfs_debug(mp, "Bulkstat returned error 0x%x", error);
1226                         break;
1227                 }
1228         } while (!done);
1229
1230         xfs_debug(mp, "Checking results against system dquots");
1231         for (i = 0; i < qmtest_hashmask; i++) {
1232                 xfs_dqtest_t    *d, *n;
1233                 xfs_dqhash_t    *h;
1234
1235                 h = &qmtest_udqtab[i];
1236                 list_for_each_entry_safe(d, n, &h->qh_list, q_hashlist) {
1237                         xfs_dqtest_cmp(d);
1238                         kmem_free(d);
1239                 }
1240                 h = &qmtest_gdqtab[i];
1241                 list_for_each_entry_safe(d, n, &h->qh_list, q_hashlist) {
1242                         xfs_dqtest_cmp(d);
1243                         kmem_free(d);
1244                 }
1245         }
1246
1247         if (qmtest_nfails) {
1248                 xfs_debug(mp, "******** quotacheck failed  ********");
1249                 xfs_debug(mp, "failures = %d", qmtest_nfails);
1250         } else {
1251                 xfs_debug(mp, "******** quotacheck successful! ********");
1252         }
1253         kmem_free(qmtest_udqtab);
1254         kmem_free(qmtest_gdqtab);
1255         mutex_unlock(&qcheck_lock);
1256         return (qmtest_nfails);
1257 }
1258
1259 #endif /* DEBUG */