[XFS] Use struct inodes instead of vnodes to kill vn_grab
[linux-2.6.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_dir2.h"
30 #include "xfs_alloc.h"
31 #include "xfs_dmapi.h"
32 #include "xfs_quota.h"
33 #include "xfs_mount.h"
34 #include "xfs_bmap_btree.h"
35 #include "xfs_alloc_btree.h"
36 #include "xfs_ialloc_btree.h"
37 #include "xfs_dir2_sf.h"
38 #include "xfs_attr_sf.h"
39 #include "xfs_dinode.h"
40 #include "xfs_inode.h"
41 #include "xfs_ialloc.h"
42 #include "xfs_itable.h"
43 #include "xfs_bmap.h"
44 #include "xfs_btree.h"
45 #include "xfs_rtalloc.h"
46 #include "xfs_error.h"
47 #include "xfs_rw.h"
48 #include "xfs_acl.h"
49 #include "xfs_attr.h"
50 #include "xfs_buf_item.h"
51 #include "xfs_utils.h"
52 #include "xfs_qm.h"
53
54 #ifdef DEBUG
55 # define qdprintk(s, args...)   cmn_err(CE_DEBUG, s, ## args)
56 #else
57 # define qdprintk(s, args...)   do { } while (0)
58 #endif
59
60 STATIC int      xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
61 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
62                                         fs_disk_quota_t *);
63 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
64 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
65                                         fs_disk_quota_t *);
66 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
67 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
68 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
69 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
70                                         uint);
71 STATIC uint     xfs_qm_import_flags(uint);
72 STATIC uint     xfs_qm_export_flags(uint);
73 STATIC uint     xfs_qm_import_qtype_flags(uint);
74 STATIC uint     xfs_qm_export_qtype_flags(uint);
75 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
76                                         fs_disk_quota_t *);
77
78
79 /*
80  * The main distribution switch of all XFS quotactl system calls.
81  */
82 int
83 xfs_qm_quotactl(
84         xfs_mount_t     *mp,
85         int             cmd,
86         int             id,
87         xfs_caddr_t     addr)
88 {
89         int             error;
90
91         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
92
93         /*
94          * The following commands are valid even when quotaoff.
95          */
96         switch (cmd) {
97         case Q_XQUOTARM:
98                 /*
99                  * Truncate quota files. quota must be off.
100                  */
101                 if (XFS_IS_QUOTA_ON(mp))
102                         return XFS_ERROR(EINVAL);
103                 if (mp->m_flags & XFS_MOUNT_RDONLY)
104                         return XFS_ERROR(EROFS);
105                 return (xfs_qm_scall_trunc_qfiles(mp,
106                                xfs_qm_import_qtype_flags(*(uint *)addr)));
107
108         case Q_XGETQSTAT:
109                 /*
110                  * Get quota status information.
111                  */
112                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
113
114         case Q_XQUOTAON:
115                 /*
116                  * QUOTAON - enabling quota enforcement.
117                  * Quota accounting must be turned on at mount time.
118                  */
119                 if (mp->m_flags & XFS_MOUNT_RDONLY)
120                         return XFS_ERROR(EROFS);
121                 return (xfs_qm_scall_quotaon(mp,
122                                           xfs_qm_import_flags(*(uint *)addr)));
123
124         case Q_XQUOTAOFF:
125                 if (mp->m_flags & XFS_MOUNT_RDONLY)
126                         return XFS_ERROR(EROFS);
127                 break;
128
129         case Q_XQUOTASYNC:
130                 return (xfs_sync_inodes(mp, SYNC_DELWRI, NULL));
131
132         default:
133                 break;
134         }
135
136         if (! XFS_IS_QUOTA_ON(mp))
137                 return XFS_ERROR(ESRCH);
138
139         switch (cmd) {
140         case Q_XQUOTAOFF:
141                 if (mp->m_flags & XFS_MOUNT_RDONLY)
142                         return XFS_ERROR(EROFS);
143                 error = xfs_qm_scall_quotaoff(mp,
144                                             xfs_qm_import_flags(*(uint *)addr),
145                                             B_FALSE);
146                 break;
147
148         case Q_XGETQUOTA:
149                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
150                                         (fs_disk_quota_t *)addr);
151                 break;
152         case Q_XGETGQUOTA:
153                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
154                                         (fs_disk_quota_t *)addr);
155                 break;
156         case Q_XGETPQUOTA:
157                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
158                                         (fs_disk_quota_t *)addr);
159                 break;
160
161         case Q_XSETQLIM:
162                 if (mp->m_flags & XFS_MOUNT_RDONLY)
163                         return XFS_ERROR(EROFS);
164                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
165                                              (fs_disk_quota_t *)addr);
166                 break;
167         case Q_XSETGQLIM:
168                 if (mp->m_flags & XFS_MOUNT_RDONLY)
169                         return XFS_ERROR(EROFS);
170                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
171                                              (fs_disk_quota_t *)addr);
172                 break;
173         case Q_XSETPQLIM:
174                 if (mp->m_flags & XFS_MOUNT_RDONLY)
175                         return XFS_ERROR(EROFS);
176                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
177                                              (fs_disk_quota_t *)addr);
178                 break;
179
180         default:
181                 error = XFS_ERROR(EINVAL);
182                 break;
183         }
184
185         return (error);
186 }
187
188 /*
189  * Turn off quota accounting and/or enforcement for all udquots and/or
190  * gdquots. Called only at unmount time.
191  *
192  * This assumes that there are no dquots of this file system cached
193  * incore, and modifies the ondisk dquot directly. Therefore, for example,
194  * it is an error to call this twice, without purging the cache.
195  */
196 STATIC int
197 xfs_qm_scall_quotaoff(
198         xfs_mount_t             *mp,
199         uint                    flags,
200         boolean_t               force)
201 {
202         uint                    dqtype;
203         int                     error;
204         uint                    inactivate_flags;
205         xfs_qoff_logitem_t      *qoffstart;
206         int                     nculprits;
207
208         if (!force && !capable(CAP_SYS_ADMIN))
209                 return XFS_ERROR(EPERM);
210         /*
211          * No file system can have quotas enabled on disk but not in core.
212          * Note that quota utilities (like quotaoff) _expect_
213          * errno == EEXIST here.
214          */
215         if ((mp->m_qflags & flags) == 0)
216                 return XFS_ERROR(EEXIST);
217         error = 0;
218
219         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
220
221         /*
222          * We don't want to deal with two quotaoffs messing up each other,
223          * so we're going to serialize it. quotaoff isn't exactly a performance
224          * critical thing.
225          * If quotaoff, then we must be dealing with the root filesystem.
226          */
227         ASSERT(mp->m_quotainfo);
228         if (mp->m_quotainfo)
229                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
230
231         ASSERT(mp->m_quotainfo);
232
233         /*
234          * If we're just turning off quota enforcement, change mp and go.
235          */
236         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
237                 mp->m_qflags &= ~(flags);
238
239                 spin_lock(&mp->m_sb_lock);
240                 mp->m_sb.sb_qflags = mp->m_qflags;
241                 spin_unlock(&mp->m_sb_lock);
242                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
243
244                 /* XXX what to do if error ? Revert back to old vals incore ? */
245                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
246                 return (error);
247         }
248
249         dqtype = 0;
250         inactivate_flags = 0;
251         /*
252          * If accounting is off, we must turn enforcement off, clear the
253          * quota 'CHKD' certificate to make it known that we have to
254          * do a quotacheck the next time this quota is turned on.
255          */
256         if (flags & XFS_UQUOTA_ACCT) {
257                 dqtype |= XFS_QMOPT_UQUOTA;
258                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
259                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
260         }
261         if (flags & XFS_GQUOTA_ACCT) {
262                 dqtype |= XFS_QMOPT_GQUOTA;
263                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
264                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
265         } else if (flags & XFS_PQUOTA_ACCT) {
266                 dqtype |= XFS_QMOPT_PQUOTA;
267                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
268                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
269         }
270
271         /*
272          * Nothing to do?  Don't complain. This happens when we're just
273          * turning off quota enforcement.
274          */
275         if ((mp->m_qflags & flags) == 0) {
276                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
277                 return (0);
278         }
279
280         /*
281          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
282          * and synchronously. If we fail to write, we should abort the
283          * operation as it cannot be recovered safely if we crash.
284          */
285         error = xfs_qm_log_quotaoff(mp, &qoffstart, flags);
286         if (error)
287                 goto out_error;
288
289         /*
290          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
291          * to take care of the race between dqget and quotaoff. We don't take
292          * any special locks to reset these bits. All processes need to check
293          * these bits *after* taking inode lock(s) to see if the particular
294          * quota type is in the process of being turned off. If *ACTIVE, it is
295          * guaranteed that all dquot structures and all quotainode ptrs will all
296          * stay valid as long as that inode is kept locked.
297          *
298          * There is no turning back after this.
299          */
300         mp->m_qflags &= ~inactivate_flags;
301
302         /*
303          * Give back all the dquot reference(s) held by inodes.
304          * Here we go thru every single incore inode in this file system, and
305          * do a dqrele on the i_udquot/i_gdquot that it may have.
306          * Essentially, as long as somebody has an inode locked, this guarantees
307          * that quotas will not be turned off. This is handy because in a
308          * transaction once we lock the inode(s) and check for quotaon, we can
309          * depend on the quota inodes (and other things) being valid as long as
310          * we keep the lock(s).
311          */
312         xfs_qm_dqrele_all_inodes(mp, flags);
313
314         /*
315          * Next we make the changes in the quota flag in the mount struct.
316          * This isn't protected by a particular lock directly, because we
317          * don't want to take a mrlock everytime we depend on quotas being on.
318          */
319         mp->m_qflags &= ~(flags);
320
321         /*
322          * Go through all the dquots of this file system and purge them,
323          * according to what was turned off. We may not be able to get rid
324          * of all dquots, because dquots can have temporary references that
325          * are not attached to inodes. eg. xfs_setattr, xfs_create.
326          * So, if we couldn't purge all the dquots from the filesystem,
327          * we can't get rid of the incore data structures.
328          */
329         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
330                 delay(10 * nculprits);
331
332         /*
333          * Transactions that had started before ACTIVE state bit was cleared
334          * could have logged many dquots, so they'd have higher LSNs than
335          * the first QUOTAOFF log record does. If we happen to crash when
336          * the tail of the log has gone past the QUOTAOFF record, but
337          * before the last dquot modification, those dquots __will__
338          * recover, and that's not good.
339          *
340          * So, we have QUOTAOFF start and end logitems; the start
341          * logitem won't get overwritten until the end logitem appears...
342          */
343         error = xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
344         if (error) {
345                 /* We're screwed now. Shutdown is the only option. */
346                 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
347                 goto out_error;
348         }
349
350         /*
351          * If quotas is completely disabled, close shop.
352          */
353         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
354             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
355                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
356                 xfs_qm_destroy_quotainfo(mp);
357                 return (0);
358         }
359
360         /*
361          * Release our quotainode references, and vn_purge them,
362          * if we don't need them anymore.
363          */
364         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
365                 IRELE(XFS_QI_UQIP(mp));
366                 XFS_QI_UQIP(mp) = NULL;
367         }
368         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
369                 IRELE(XFS_QI_GQIP(mp));
370                 XFS_QI_GQIP(mp) = NULL;
371         }
372 out_error:
373         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
374
375         return (error);
376 }
377
378 STATIC int
379 xfs_qm_scall_trunc_qfiles(
380         xfs_mount_t     *mp,
381         uint            flags)
382 {
383         int             error = 0, error2 = 0;
384         xfs_inode_t     *qip;
385
386         if (!capable(CAP_SYS_ADMIN))
387                 return XFS_ERROR(EPERM);
388         if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0) {
389                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
390                 return XFS_ERROR(EINVAL);
391         }
392
393         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
394                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
395                 if (!error) {
396                         error = xfs_truncate_file(mp, qip);
397                         IRELE(qip);
398                 }
399         }
400
401         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
402             mp->m_sb.sb_gquotino != NULLFSINO) {
403                 error2 = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
404                 if (!error2) {
405                         error2 = xfs_truncate_file(mp, qip);
406                         IRELE(qip);
407                 }
408         }
409
410         return error ? error : error2;
411 }
412
413
414 /*
415  * Switch on (a given) quota enforcement for a filesystem.  This takes
416  * effect immediately.
417  * (Switching on quota accounting must be done at mount time.)
418  */
419 STATIC int
420 xfs_qm_scall_quotaon(
421         xfs_mount_t     *mp,
422         uint            flags)
423 {
424         int             error;
425         uint            qf;
426         uint            accflags;
427         __int64_t       sbflags;
428
429         if (!capable(CAP_SYS_ADMIN))
430                 return XFS_ERROR(EPERM);
431
432         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
433         /*
434          * Switching on quota accounting must be done at mount time.
435          */
436         accflags = flags & XFS_ALL_QUOTA_ACCT;
437         flags &= ~(XFS_ALL_QUOTA_ACCT);
438
439         sbflags = 0;
440
441         if (flags == 0) {
442                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
443                 return XFS_ERROR(EINVAL);
444         }
445
446         /* No fs can turn on quotas with a delayed effect */
447         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
448
449         /*
450          * Can't enforce without accounting. We check the superblock
451          * qflags here instead of m_qflags because rootfs can have
452          * quota acct on ondisk without m_qflags' knowing.
453          */
454         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
455             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
456             (flags & XFS_UQUOTA_ENFD))
457             ||
458             ((flags & XFS_PQUOTA_ACCT) == 0 &&
459             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
460             (flags & XFS_GQUOTA_ACCT) == 0 &&
461             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
462             (flags & XFS_OQUOTA_ENFD))) {
463                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
464                         flags, mp->m_sb.sb_qflags);
465                 return XFS_ERROR(EINVAL);
466         }
467         /*
468          * If everything's upto-date incore, then don't waste time.
469          */
470         if ((mp->m_qflags & flags) == flags)
471                 return XFS_ERROR(EEXIST);
472
473         /*
474          * Change sb_qflags on disk but not incore mp->qflags
475          * if this is the root filesystem.
476          */
477         spin_lock(&mp->m_sb_lock);
478         qf = mp->m_sb.sb_qflags;
479         mp->m_sb.sb_qflags = qf | flags;
480         spin_unlock(&mp->m_sb_lock);
481
482         /*
483          * There's nothing to change if it's the same.
484          */
485         if ((qf & flags) == flags && sbflags == 0)
486                 return XFS_ERROR(EEXIST);
487         sbflags |= XFS_SB_QFLAGS;
488
489         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
490                 return (error);
491         /*
492          * If we aren't trying to switch on quota enforcement, we are done.
493          */
494         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
495              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
496              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
497              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
498              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
499              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
500             (flags & XFS_ALL_QUOTA_ENFD) == 0)
501                 return (0);
502
503         if (! XFS_IS_QUOTA_RUNNING(mp))
504                 return XFS_ERROR(ESRCH);
505
506         /*
507          * Switch on quota enforcement in core.
508          */
509         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
510         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
511         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
512
513         return (0);
514 }
515
516
517 /*
518  * Return quota status information, such as uquota-off, enforcements, etc.
519  */
520 STATIC int
521 xfs_qm_scall_getqstat(
522         xfs_mount_t     *mp,
523         fs_quota_stat_t *out)
524 {
525         xfs_inode_t     *uip, *gip;
526         boolean_t       tempuqip, tempgqip;
527
528         uip = gip = NULL;
529         tempuqip = tempgqip = B_FALSE;
530         memset(out, 0, sizeof(fs_quota_stat_t));
531
532         out->qs_version = FS_QSTAT_VERSION;
533         if (!xfs_sb_version_hasquota(&mp->m_sb)) {
534                 out->qs_uquota.qfs_ino = NULLFSINO;
535                 out->qs_gquota.qfs_ino = NULLFSINO;
536                 return (0);
537         }
538         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
539                                                         (XFS_ALL_QUOTA_ACCT|
540                                                          XFS_ALL_QUOTA_ENFD));
541         out->qs_pad = 0;
542         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
543         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
544
545         if (mp->m_quotainfo) {
546                 uip = mp->m_quotainfo->qi_uquotaip;
547                 gip = mp->m_quotainfo->qi_gquotaip;
548         }
549         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
550                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
551                                         0, 0, &uip, 0) == 0)
552                         tempuqip = B_TRUE;
553         }
554         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
555                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
556                                         0, 0, &gip, 0) == 0)
557                         tempgqip = B_TRUE;
558         }
559         if (uip) {
560                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
561                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
562                 if (tempuqip)
563                         IRELE(uip);
564         }
565         if (gip) {
566                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
567                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
568                 if (tempgqip)
569                         IRELE(gip);
570         }
571         if (mp->m_quotainfo) {
572                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
573                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
574                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
575                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
576                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
577                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
578         }
579         return (0);
580 }
581
582 /*
583  * Adjust quota limits, and start/stop timers accordingly.
584  */
585 STATIC int
586 xfs_qm_scall_setqlim(
587         xfs_mount_t             *mp,
588         xfs_dqid_t              id,
589         uint                    type,
590         fs_disk_quota_t         *newlim)
591 {
592         xfs_disk_dquot_t        *ddq;
593         xfs_dquot_t             *dqp;
594         xfs_trans_t             *tp;
595         int                     error;
596         xfs_qcnt_t              hard, soft;
597
598         if (!capable(CAP_SYS_ADMIN))
599                 return XFS_ERROR(EPERM);
600
601         if ((newlim->d_fieldmask &
602             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
603                 return (0);
604
605         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
606         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
607                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
608                 xfs_trans_cancel(tp, 0);
609                 return (error);
610         }
611
612         /*
613          * We don't want to race with a quotaoff so take the quotaoff lock.
614          * (We don't hold an inode lock, so there's nothing else to stop
615          * a quotaoff from happening). (XXXThis doesn't currently happen
616          * because we take the vfslock before calling xfs_qm_sysent).
617          */
618         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
619
620         /*
621          * Get the dquot (locked), and join it to the transaction.
622          * Allocate the dquot if this doesn't exist.
623          */
624         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
625                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
626                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
627                 ASSERT(error != ENOENT);
628                 return (error);
629         }
630         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
631         xfs_trans_dqjoin(tp, dqp);
632         ddq = &dqp->q_core;
633
634         /*
635          * Make sure that hardlimits are >= soft limits before changing.
636          */
637         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
638                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
639                         be64_to_cpu(ddq->d_blk_hardlimit);
640         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
641                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
642                         be64_to_cpu(ddq->d_blk_softlimit);
643         if (hard == 0 || hard >= soft) {
644                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
645                 ddq->d_blk_softlimit = cpu_to_be64(soft);
646                 if (id == 0) {
647                         mp->m_quotainfo->qi_bhardlimit = hard;
648                         mp->m_quotainfo->qi_bsoftlimit = soft;
649                 }
650         } else {
651                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
652         }
653         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
654                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
655                         be64_to_cpu(ddq->d_rtb_hardlimit);
656         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
657                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
658                         be64_to_cpu(ddq->d_rtb_softlimit);
659         if (hard == 0 || hard >= soft) {
660                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
661                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
662                 if (id == 0) {
663                         mp->m_quotainfo->qi_rtbhardlimit = hard;
664                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
665                 }
666         } else {
667                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
668         }
669
670         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
671                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
672                         be64_to_cpu(ddq->d_ino_hardlimit);
673         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
674                 (xfs_qcnt_t) newlim->d_ino_softlimit :
675                         be64_to_cpu(ddq->d_ino_softlimit);
676         if (hard == 0 || hard >= soft) {
677                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
678                 ddq->d_ino_softlimit = cpu_to_be64(soft);
679                 if (id == 0) {
680                         mp->m_quotainfo->qi_ihardlimit = hard;
681                         mp->m_quotainfo->qi_isoftlimit = soft;
682                 }
683         } else {
684                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
685         }
686
687         /*
688          * Update warnings counter(s) if requested
689          */
690         if (newlim->d_fieldmask & FS_DQ_BWARNS)
691                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
692         if (newlim->d_fieldmask & FS_DQ_IWARNS)
693                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
694         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
695                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
696
697         if (id == 0) {
698                 /*
699                  * Timelimits for the super user set the relative time
700                  * the other users can be over quota for this file system.
701                  * If it is zero a default is used.  Ditto for the default
702                  * soft and hard limit values (already done, above), and
703                  * for warnings.
704                  */
705                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
706                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
707                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
708                 }
709                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
710                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
711                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
712                 }
713                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
714                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
715                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
716                 }
717                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
718                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
719                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
720                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
721                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
722                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
723         } else {
724                 /*
725                  * If the user is now over quota, start the timelimit.
726                  * The user will not be 'warned'.
727                  * Note that we keep the timers ticking, whether enforcement
728                  * is on or off. We don't really want to bother with iterating
729                  * over all ondisk dquots and turning the timers on/off.
730                  */
731                 xfs_qm_adjust_dqtimers(mp, ddq);
732         }
733         dqp->dq_flags |= XFS_DQ_DIRTY;
734         xfs_trans_log_dquot(tp, dqp);
735
736         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
737         error = xfs_trans_commit(tp, 0);
738         xfs_qm_dqprint(dqp);
739         xfs_qm_dqrele(dqp);
740         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
741
742         return error;
743 }
744
745 STATIC int
746 xfs_qm_scall_getquota(
747         xfs_mount_t     *mp,
748         xfs_dqid_t      id,
749         uint            type,
750         fs_disk_quota_t *out)
751 {
752         xfs_dquot_t     *dqp;
753         int             error;
754
755         /*
756          * Try to get the dquot. We don't want it allocated on disk, so
757          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
758          * exist, we'll get ENOENT back.
759          */
760         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
761                 return (error);
762         }
763
764         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
765         /*
766          * If everything's NULL, this dquot doesn't quite exist as far as
767          * our utility programs are concerned.
768          */
769         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
770                 xfs_qm_dqput(dqp);
771                 return XFS_ERROR(ENOENT);
772         }
773         /* xfs_qm_dqprint(dqp); */
774         /*
775          * Convert the disk dquot to the exportable format
776          */
777         xfs_qm_export_dquot(mp, &dqp->q_core, out);
778         xfs_qm_dqput(dqp);
779         return (error ? XFS_ERROR(EFAULT) : 0);
780 }
781
782
783 STATIC int
784 xfs_qm_log_quotaoff_end(
785         xfs_mount_t             *mp,
786         xfs_qoff_logitem_t      *startqoff,
787         uint                    flags)
788 {
789         xfs_trans_t             *tp;
790         int                     error;
791         xfs_qoff_logitem_t      *qoffi;
792
793         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
794
795         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
796                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
797                 xfs_trans_cancel(tp, 0);
798                 return (error);
799         }
800
801         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
802                                         flags & XFS_ALL_QUOTA_ACCT);
803         xfs_trans_log_quotaoff_item(tp, qoffi);
804
805         /*
806          * We have to make sure that the transaction is secure on disk before we
807          * return and actually stop quota accounting. So, make it synchronous.
808          * We don't care about quotoff's performance.
809          */
810         xfs_trans_set_sync(tp);
811         error = xfs_trans_commit(tp, 0);
812         return (error);
813 }
814
815
816 STATIC int
817 xfs_qm_log_quotaoff(
818         xfs_mount_t            *mp,
819         xfs_qoff_logitem_t     **qoffstartp,
820         uint                   flags)
821 {
822         xfs_trans_t            *tp;
823         int                     error;
824         xfs_qoff_logitem_t     *qoffi=NULL;
825         uint                    oldsbqflag=0;
826
827         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
828         if ((error = xfs_trans_reserve(tp, 0,
829                                       sizeof(xfs_qoff_logitem_t) * 2 +
830                                       mp->m_sb.sb_sectsize + 128,
831                                       0,
832                                       0,
833                                       XFS_DEFAULT_LOG_COUNT))) {
834                 goto error0;
835         }
836
837         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
838         xfs_trans_log_quotaoff_item(tp, qoffi);
839
840         spin_lock(&mp->m_sb_lock);
841         oldsbqflag = mp->m_sb.sb_qflags;
842         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
843         spin_unlock(&mp->m_sb_lock);
844
845         xfs_mod_sb(tp, XFS_SB_QFLAGS);
846
847         /*
848          * We have to make sure that the transaction is secure on disk before we
849          * return and actually stop quota accounting. So, make it synchronous.
850          * We don't care about quotoff's performance.
851          */
852         xfs_trans_set_sync(tp);
853         error = xfs_trans_commit(tp, 0);
854
855 error0:
856         if (error) {
857                 xfs_trans_cancel(tp, 0);
858                 /*
859                  * No one else is modifying sb_qflags, so this is OK.
860                  * We still hold the quotaofflock.
861                  */
862                 spin_lock(&mp->m_sb_lock);
863                 mp->m_sb.sb_qflags = oldsbqflag;
864                 spin_unlock(&mp->m_sb_lock);
865         }
866         *qoffstartp = qoffi;
867         return (error);
868 }
869
870
871 /*
872  * Translate an internal style on-disk-dquot to the exportable format.
873  * The main differences are that the counters/limits are all in Basic
874  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
875  * to be converted to the native endianness.
876  */
877 STATIC void
878 xfs_qm_export_dquot(
879         xfs_mount_t             *mp,
880         xfs_disk_dquot_t        *src,
881         struct fs_disk_quota    *dst)
882 {
883         memset(dst, 0, sizeof(*dst));
884         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
885         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
886         dst->d_id = be32_to_cpu(src->d_id);
887         dst->d_blk_hardlimit =
888                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
889         dst->d_blk_softlimit =
890                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
891         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
892         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
893         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
894         dst->d_icount = be64_to_cpu(src->d_icount);
895         dst->d_btimer = be32_to_cpu(src->d_btimer);
896         dst->d_itimer = be32_to_cpu(src->d_itimer);
897         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
898         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
899         dst->d_rtb_hardlimit =
900                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
901         dst->d_rtb_softlimit =
902                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
903         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
904         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
905         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
906
907         /*
908          * Internally, we don't reset all the timers when quota enforcement
909          * gets turned off. No need to confuse the user level code,
910          * so return zeroes in that case.
911          */
912         if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
913             (!XFS_IS_OQUOTA_ENFORCED(mp) &&
914                         (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
915                 dst->d_btimer = 0;
916                 dst->d_itimer = 0;
917                 dst->d_rtbtimer = 0;
918         }
919
920 #ifdef DEBUG
921         if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == XFS_USER_QUOTA) ||
922              (XFS_IS_OQUOTA_ENFORCED(mp) &&
923                         (dst->d_flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)))) &&
924             dst->d_id != 0) {
925                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
926                     (dst->d_blk_softlimit > 0)) {
927                         ASSERT(dst->d_btimer != 0);
928                 }
929                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
930                     (dst->d_ino_softlimit > 0)) {
931                         ASSERT(dst->d_itimer != 0);
932                 }
933         }
934 #endif
935 }
936
937 STATIC uint
938 xfs_qm_import_qtype_flags(
939         uint            uflags)
940 {
941         uint            oflags = 0;
942
943         /*
944          * Can't be more than one, or none.
945          */
946         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
947                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
948             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
949                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
950             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
951                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
952             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
953                 return (0);
954
955         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
956         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
957         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
958         return oflags;
959 }
960
961 STATIC uint
962 xfs_qm_export_qtype_flags(
963         uint flags)
964 {
965         /*
966          * Can't be more than one, or none.
967          */
968         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
969                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
970         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
971                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
972         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
973                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
974         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
975
976         return (flags & XFS_DQ_USER) ?
977                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
978                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
979 }
980
981 STATIC uint
982 xfs_qm_import_flags(
983         uint uflags)
984 {
985         uint flags = 0;
986
987         if (uflags & XFS_QUOTA_UDQ_ACCT)
988                 flags |= XFS_UQUOTA_ACCT;
989         if (uflags & XFS_QUOTA_PDQ_ACCT)
990                 flags |= XFS_PQUOTA_ACCT;
991         if (uflags & XFS_QUOTA_GDQ_ACCT)
992                 flags |= XFS_GQUOTA_ACCT;
993         if (uflags & XFS_QUOTA_UDQ_ENFD)
994                 flags |= XFS_UQUOTA_ENFD;
995         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
996                 flags |= XFS_OQUOTA_ENFD;
997         return (flags);
998 }
999
1000
1001 STATIC uint
1002 xfs_qm_export_flags(
1003         uint flags)
1004 {
1005         uint uflags;
1006
1007         uflags = 0;
1008         if (flags & XFS_UQUOTA_ACCT)
1009                 uflags |= XFS_QUOTA_UDQ_ACCT;
1010         if (flags & XFS_PQUOTA_ACCT)
1011                 uflags |= XFS_QUOTA_PDQ_ACCT;
1012         if (flags & XFS_GQUOTA_ACCT)
1013                 uflags |= XFS_QUOTA_GDQ_ACCT;
1014         if (flags & XFS_UQUOTA_ENFD)
1015                 uflags |= XFS_QUOTA_UDQ_ENFD;
1016         if (flags & (XFS_OQUOTA_ENFD)) {
1017                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1018                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1019         }
1020         return (uflags);
1021 }
1022
1023
1024 /*
1025  * Release all the dquots on the inodes in an AG.
1026  */
1027 STATIC void
1028 xfs_qm_dqrele_inodes_ag(
1029         xfs_mount_t     *mp,
1030         int             ag,
1031         uint            flags)
1032 {
1033         xfs_inode_t     *ip = NULL;
1034         xfs_perag_t     *pag = &mp->m_perag[ag];
1035         int             first_index = 0;
1036         int             nr_found;
1037
1038         do {
1039                 boolean_t       inode_refed;
1040                 struct inode    *inode;
1041
1042                 /*
1043                  * use a gang lookup to find the next inode in the tree
1044                  * as the tree is sparse and a gang lookup walks to find
1045                  * the number of objects requested.
1046                  */
1047                 read_lock(&pag->pag_ici_lock);
1048                 nr_found = radix_tree_gang_lookup(&pag->pag_ici_root,
1049                                 (void**)&ip, first_index, 1);
1050
1051                 if (!nr_found) {
1052                         read_unlock(&pag->pag_ici_lock);
1053                         break;
1054                 }
1055
1056                 /* update the index for the next lookup */
1057                 first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1);
1058
1059                 /* skip quota inodes and those in reclaim */
1060                 inode = VFS_I(ip);
1061                 if (!inode || ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1062                         ASSERT(ip->i_udquot == NULL);
1063                         ASSERT(ip->i_gdquot == NULL);
1064                         read_unlock(&pag->pag_ici_lock);
1065                         continue;
1066                 }
1067                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1068                         inode = igrab(inode);
1069                         read_unlock(&pag->pag_ici_lock);
1070                         if (!inode)
1071                                 continue;
1072                         inode_refed = B_TRUE;
1073                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1074                 } else {
1075                         read_unlock(&pag->pag_ici_lock);
1076                 }
1077                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1078                         xfs_qm_dqrele(ip->i_udquot);
1079                         ip->i_udquot = NULL;
1080                 }
1081                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) &&
1082                     ip->i_gdquot) {
1083                         xfs_qm_dqrele(ip->i_gdquot);
1084                         ip->i_gdquot = NULL;
1085                 }
1086                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1087                 if (inode_refed)
1088                         IRELE(ip);
1089         } while (nr_found);
1090 }
1091
1092 /*
1093  * Go thru all the inodes in the file system, releasing their dquots.
1094  * Note that the mount structure gets modified to indicate that quotas are off
1095  * AFTER this, in the case of quotaoff. This also gets called from
1096  * xfs_rootumount.
1097  */
1098 void
1099 xfs_qm_dqrele_all_inodes(
1100         struct xfs_mount *mp,
1101         uint             flags)
1102 {
1103         int             i;
1104
1105         ASSERT(mp->m_quotainfo);
1106         for (i = 0; i < mp->m_sb.sb_agcount; i++) {
1107                 if (!mp->m_perag[i].pag_ici_init)
1108                         continue;
1109                 xfs_qm_dqrele_inodes_ag(mp, i, flags);
1110         }
1111 }
1112
1113 /*------------------------------------------------------------------------*/
1114 #ifdef DEBUG
1115 /*
1116  * This contains all the test functions for XFS disk quotas.
1117  * Currently it does a quota accounting check. ie. it walks through
1118  * all inodes in the file system, calculating the dquot accounting fields,
1119  * and prints out any inconsistencies.
1120  */
1121 xfs_dqhash_t *qmtest_udqtab;
1122 xfs_dqhash_t *qmtest_gdqtab;
1123 int           qmtest_hashmask;
1124 int           qmtest_nfails;
1125 mutex_t       qcheck_lock;
1126
1127 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1128                                  (__psunsigned_t)(id)) & \
1129                                 (qmtest_hashmask - 1))
1130
1131 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1132                                      (qmtest_udqtab + \
1133                                       DQTEST_HASHVAL(mp, id)) : \
1134                                      (qmtest_gdqtab + \
1135                                       DQTEST_HASHVAL(mp, id)))
1136
1137 #define DQTEST_LIST_PRINT(l, NXT, title) \
1138 { \
1139           xfs_dqtest_t  *dqp; int i = 0;\
1140           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1141           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1142                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1143                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1144                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1145                          dqp->d_bcount, dqp->d_icount); } \
1146 }
1147
1148 typedef struct dqtest {
1149         xfs_dqmarker_t  q_lists;
1150         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1151         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1152         xfs_dqid_t      d_id;           /* user id or group id */
1153         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1154         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1155 } xfs_dqtest_t;
1156
1157 STATIC void
1158 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1159 {
1160         xfs_dquot_t *d;
1161         if (((d) = (h)->qh_next))
1162                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1163         (dqp)->HL_NEXT = d;
1164         (dqp)->HL_PREVP = &((h)->qh_next);
1165         (h)->qh_next = (xfs_dquot_t *)dqp;
1166         (h)->qh_version++;
1167         (h)->qh_nelems++;
1168 }
1169 STATIC void
1170 xfs_qm_dqtest_print(
1171         xfs_dqtest_t    *d)
1172 {
1173         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1174         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1175         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1176         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1177                 d->d_bcount, (int)d->d_bcount);
1178         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1179                 d->d_icount, (int)d->d_icount);
1180         cmn_err(CE_DEBUG, "---------------------------");
1181 }
1182
1183 STATIC void
1184 xfs_qm_dqtest_failed(
1185         xfs_dqtest_t    *d,
1186         xfs_dquot_t     *dqp,
1187         char            *reason,
1188         xfs_qcnt_t      a,
1189         xfs_qcnt_t      b,
1190         int             error)
1191 {
1192         qmtest_nfails++;
1193         if (error)
1194                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1195                        d->d_id, error, reason);
1196         else
1197                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1198                        d->d_id, reason, (int)a, (int)b);
1199         xfs_qm_dqtest_print(d);
1200         if (dqp)
1201                 xfs_qm_dqprint(dqp);
1202 }
1203
1204 STATIC int
1205 xfs_dqtest_cmp2(
1206         xfs_dqtest_t    *d,
1207         xfs_dquot_t     *dqp)
1208 {
1209         int err = 0;
1210         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1211                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1212                         be64_to_cpu(dqp->q_core.d_icount),
1213                         d->d_icount, 0);
1214                 err++;
1215         }
1216         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1217                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1218                         be64_to_cpu(dqp->q_core.d_bcount),
1219                         d->d_bcount, 0);
1220                 err++;
1221         }
1222         if (dqp->q_core.d_blk_softlimit &&
1223             be64_to_cpu(dqp->q_core.d_bcount) >=
1224             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1225                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1226                         cmn_err(CE_DEBUG,
1227                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1228                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1229                         err++;
1230                 }
1231         }
1232         if (dqp->q_core.d_ino_softlimit &&
1233             be64_to_cpu(dqp->q_core.d_icount) >=
1234             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1235                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1236                         cmn_err(CE_DEBUG,
1237                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1238                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1239                         err++;
1240                 }
1241         }
1242 #ifdef QUOTADEBUG
1243         if (!err) {
1244                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1245                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1246         }
1247 #endif
1248         return (err);
1249 }
1250
1251 STATIC void
1252 xfs_dqtest_cmp(
1253         xfs_dqtest_t    *d)
1254 {
1255         xfs_dquot_t     *dqp;
1256         int             error;
1257
1258         /* xfs_qm_dqtest_print(d); */
1259         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1260                                  &dqp))) {
1261                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1262                 return;
1263         }
1264         xfs_dqtest_cmp2(d, dqp);
1265         xfs_qm_dqput(dqp);
1266 }
1267
1268 STATIC int
1269 xfs_qm_internalqcheck_dqget(
1270         xfs_mount_t     *mp,
1271         xfs_dqid_t      id,
1272         uint            type,
1273         xfs_dqtest_t    **O_dq)
1274 {
1275         xfs_dqtest_t    *d;
1276         xfs_dqhash_t    *h;
1277
1278         h = DQTEST_HASH(mp, id, type);
1279         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1280              d = (xfs_dqtest_t *) d->HL_NEXT) {
1281                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1282                 if (d->d_id == id && mp == d->q_mount) {
1283                         *O_dq = d;
1284                         return (0);
1285                 }
1286         }
1287         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1288         d->dq_flags = type;
1289         d->d_id = id;
1290         d->q_mount = mp;
1291         d->q_hash = h;
1292         xfs_qm_hashinsert(h, d);
1293         *O_dq = d;
1294         return (0);
1295 }
1296
1297 STATIC void
1298 xfs_qm_internalqcheck_get_dquots(
1299         xfs_mount_t     *mp,
1300         xfs_dqid_t      uid,
1301         xfs_dqid_t      projid,
1302         xfs_dqid_t      gid,
1303         xfs_dqtest_t    **ud,
1304         xfs_dqtest_t    **gd)
1305 {
1306         if (XFS_IS_UQUOTA_ON(mp))
1307                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1308         if (XFS_IS_GQUOTA_ON(mp))
1309                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1310         else if (XFS_IS_PQUOTA_ON(mp))
1311                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1312 }
1313
1314
1315 STATIC void
1316 xfs_qm_internalqcheck_dqadjust(
1317         xfs_inode_t             *ip,
1318         xfs_dqtest_t            *d)
1319 {
1320         d->d_icount++;
1321         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1322 }
1323
1324 STATIC int
1325 xfs_qm_internalqcheck_adjust(
1326         xfs_mount_t     *mp,            /* mount point for filesystem */
1327         xfs_ino_t       ino,            /* inode number to get data for */
1328         void            __user *buffer, /* not used */
1329         int             ubsize,         /* not used */
1330         void            *private_data,  /* not used */
1331         xfs_daddr_t     bno,            /* starting block of inode cluster */
1332         int             *ubused,        /* not used */
1333         void            *dip,           /* not used */
1334         int             *res)           /* bulkstat result code */
1335 {
1336         xfs_inode_t             *ip;
1337         xfs_dqtest_t            *ud, *gd;
1338         uint                    lock_flags;
1339         boolean_t               ipreleased;
1340         int                     error;
1341
1342         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1343
1344         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1345                 *res = BULKSTAT_RV_NOTHING;
1346                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1347                         (unsigned long long) ino,
1348                         (unsigned long long) mp->m_sb.sb_uquotino,
1349                         (unsigned long long) mp->m_sb.sb_gquotino);
1350                 return XFS_ERROR(EINVAL);
1351         }
1352         ipreleased = B_FALSE;
1353  again:
1354         lock_flags = XFS_ILOCK_SHARED;
1355         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1356                 *res = BULKSTAT_RV_NOTHING;
1357                 return (error);
1358         }
1359
1360         /*
1361          * This inode can have blocks after eof which can get released
1362          * when we send it to inactive. Since we don't check the dquot
1363          * until the after all our calculations are done, we must get rid
1364          * of those now.
1365          */
1366         if (! ipreleased) {
1367                 xfs_iput(ip, lock_flags);
1368                 ipreleased = B_TRUE;
1369                 goto again;
1370         }
1371         xfs_qm_internalqcheck_get_dquots(mp,
1372                                         (xfs_dqid_t) ip->i_d.di_uid,
1373                                         (xfs_dqid_t) ip->i_d.di_projid,
1374                                         (xfs_dqid_t) ip->i_d.di_gid,
1375                                         &ud, &gd);
1376         if (XFS_IS_UQUOTA_ON(mp)) {
1377                 ASSERT(ud);
1378                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1379         }
1380         if (XFS_IS_OQUOTA_ON(mp)) {
1381                 ASSERT(gd);
1382                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1383         }
1384         xfs_iput(ip, lock_flags);
1385         *res = BULKSTAT_RV_DIDONE;
1386         return (0);
1387 }
1388
1389
1390 /* PRIVATE, debugging */
1391 int
1392 xfs_qm_internalqcheck(
1393         xfs_mount_t     *mp)
1394 {
1395         xfs_ino_t       lastino;
1396         int             done, count;
1397         int             i;
1398         xfs_dqtest_t    *d, *e;
1399         xfs_dqhash_t    *h1;
1400         int             error;
1401
1402         lastino = 0;
1403         qmtest_hashmask = 32;
1404         count = 5;
1405         done = 0;
1406         qmtest_nfails = 0;
1407
1408         if (! XFS_IS_QUOTA_ON(mp))
1409                 return XFS_ERROR(ESRCH);
1410
1411         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1412         XFS_bflush(mp->m_ddev_targp);
1413         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1414         XFS_bflush(mp->m_ddev_targp);
1415
1416         mutex_lock(&qcheck_lock);
1417         /* There should be absolutely no quota activity while this
1418            is going on. */
1419         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1420                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1421         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1422                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1423         do {
1424                 /*
1425                  * Iterate thru all the inodes in the file system,
1426                  * adjusting the corresponding dquot counters
1427                  */
1428                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1429                                  xfs_qm_internalqcheck_adjust, NULL,
1430                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1431                         break;
1432                 }
1433         } while (! done);
1434         if (error) {
1435                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1436         }
1437         cmn_err(CE_DEBUG, "Checking results against system dquots");
1438         for (i = 0; i < qmtest_hashmask; i++) {
1439                 h1 = &qmtest_udqtab[i];
1440                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1441                         xfs_dqtest_cmp(d);
1442                         e = (xfs_dqtest_t *) d->HL_NEXT;
1443                         kmem_free(d);
1444                         d = e;
1445                 }
1446                 h1 = &qmtest_gdqtab[i];
1447                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1448                         xfs_dqtest_cmp(d);
1449                         e = (xfs_dqtest_t *) d->HL_NEXT;
1450                         kmem_free(d);
1451                         d = e;
1452                 }
1453         }
1454
1455         if (qmtest_nfails) {
1456                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1457                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1458         } else {
1459                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1460         }
1461         kmem_free(qmtest_udqtab);
1462         kmem_free(qmtest_gdqtab);
1463         mutex_unlock(&qcheck_lock);
1464         return (qmtest_nfails);
1465 }
1466
1467 #endif /* DEBUG */