Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / 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 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_dir.h"
27 #include "xfs_dir2.h"
28 #include "xfs_alloc.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_quota.h"
31 #include "xfs_mount.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_dir_sf.h"
36 #include "xfs_dir2_sf.h"
37 #include "xfs_attr_sf.h"
38 #include "xfs_dinode.h"
39 #include "xfs_inode.h"
40 #include "xfs_ialloc.h"
41 #include "xfs_itable.h"
42 #include "xfs_bmap.h"
43 #include "xfs_btree.h"
44 #include "xfs_rtalloc.h"
45 #include "xfs_error.h"
46 #include "xfs_rw.h"
47 #include "xfs_acl.h"
48 #include "xfs_cap.h"
49 #include "xfs_mac.h"
50 #include "xfs_attr.h"
51 #include "xfs_buf_item.h"
52 #include "xfs_utils.h"
53 #include "xfs_qm.h"
54
55 #ifdef DEBUG
56 # define qdprintk(s, args...)   cmn_err(CE_DEBUG, s, ## args)
57 #else
58 # define qdprintk(s, args...)   do { } while (0)
59 #endif
60
61 STATIC int      xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
62 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
63                                         fs_disk_quota_t *);
64 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
65 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
66                                         fs_disk_quota_t *);
67 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
68 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
69 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
70 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
71                                         uint);
72 STATIC uint     xfs_qm_import_flags(uint);
73 STATIC uint     xfs_qm_export_flags(uint);
74 STATIC uint     xfs_qm_import_qtype_flags(uint);
75 STATIC uint     xfs_qm_export_qtype_flags(uint);
76 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
77                                         fs_disk_quota_t *);
78
79
80 /*
81  * The main distribution switch of all XFS quotactl system calls.
82  */
83 int
84 xfs_qm_quotactl(
85         struct bhv_desc *bdp,
86         int             cmd,
87         int             id,
88         xfs_caddr_t     addr)
89 {
90         xfs_mount_t     *mp;
91         int             error;
92         struct vfs      *vfsp;
93
94         vfsp = bhvtovfs(bdp);
95         mp = XFS_VFSTOM(vfsp);
96
97         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
98
99         /*
100          * The following commands are valid even when quotaoff.
101          */
102         switch (cmd) {
103         case Q_XQUOTARM:
104                 /*
105                  * Truncate quota files. quota must be off.
106                  */
107                 if (XFS_IS_QUOTA_ON(mp))
108                         return XFS_ERROR(EINVAL);
109                 if (vfsp->vfs_flag & VFS_RDONLY)
110                         return XFS_ERROR(EROFS);
111                 return (xfs_qm_scall_trunc_qfiles(mp,
112                                xfs_qm_import_qtype_flags(*(uint *)addr)));
113
114         case Q_XGETQSTAT:
115                 /*
116                  * Get quota status information.
117                  */
118                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
119
120         case Q_XQUOTAON:
121                 /*
122                  * QUOTAON - enabling quota enforcement.
123                  * Quota accounting must be turned on at mount time.
124                  */
125                 if (vfsp->vfs_flag & VFS_RDONLY)
126                         return XFS_ERROR(EROFS);
127                 return (xfs_qm_scall_quotaon(mp,
128                                           xfs_qm_import_flags(*(uint *)addr)));
129
130         case Q_XQUOTAOFF:
131                 if (vfsp->vfs_flag & VFS_RDONLY)
132                         return XFS_ERROR(EROFS);
133                 break;
134
135         case Q_XQUOTASYNC:
136                 return (xfs_sync_inodes(mp, SYNC_DELWRI, 0, NULL));
137
138         default:
139                 break;
140         }
141
142         if (! XFS_IS_QUOTA_ON(mp))
143                 return XFS_ERROR(ESRCH);
144
145         switch (cmd) {
146         case Q_XQUOTAOFF:
147                 if (vfsp->vfs_flag & VFS_RDONLY)
148                         return XFS_ERROR(EROFS);
149                 error = xfs_qm_scall_quotaoff(mp,
150                                             xfs_qm_import_flags(*(uint *)addr),
151                                             B_FALSE);
152                 break;
153
154         case Q_XGETQUOTA:
155                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
156                                         (fs_disk_quota_t *)addr);
157                 break;
158         case Q_XGETGQUOTA:
159                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
160                                         (fs_disk_quota_t *)addr);
161                 break;
162         case Q_XGETPQUOTA:
163                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
164                                         (fs_disk_quota_t *)addr);
165                 break;
166
167         case Q_XSETQLIM:
168                 if (vfsp->vfs_flag & VFS_RDONLY)
169                         return XFS_ERROR(EROFS);
170                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
171                                              (fs_disk_quota_t *)addr);
172                 break;
173         case Q_XSETGQLIM:
174                 if (vfsp->vfs_flag & VFS_RDONLY)
175                         return XFS_ERROR(EROFS);
176                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
177                                              (fs_disk_quota_t *)addr);
178                 break;
179         case Q_XSETPQLIM:
180                 if (vfsp->vfs_flag & VFS_RDONLY)
181                         return XFS_ERROR(EROFS);
182                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
183                                              (fs_disk_quota_t *)addr);
184                 break;
185
186         default:
187                 error = XFS_ERROR(EINVAL);
188                 break;
189         }
190
191         return (error);
192 }
193
194 /*
195  * Turn off quota accounting and/or enforcement for all udquots and/or
196  * gdquots. Called only at unmount time.
197  *
198  * This assumes that there are no dquots of this file system cached
199  * incore, and modifies the ondisk dquot directly. Therefore, for example,
200  * it is an error to call this twice, without purging the cache.
201  */
202 STATIC int
203 xfs_qm_scall_quotaoff(
204         xfs_mount_t             *mp,
205         uint                    flags,
206         boolean_t               force)
207 {
208         uint                    dqtype;
209         unsigned long   s;
210         int                     error;
211         uint                    inactivate_flags;
212         xfs_qoff_logitem_t      *qoffstart;
213         int                     nculprits;
214
215         if (!force && !capable(CAP_SYS_ADMIN))
216                 return XFS_ERROR(EPERM);
217         /*
218          * No file system can have quotas enabled on disk but not in core.
219          * Note that quota utilities (like quotaoff) _expect_
220          * errno == EEXIST here.
221          */
222         if ((mp->m_qflags & flags) == 0)
223                 return XFS_ERROR(EEXIST);
224         error = 0;
225
226         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
227
228         /*
229          * We don't want to deal with two quotaoffs messing up each other,
230          * so we're going to serialize it. quotaoff isn't exactly a performance
231          * critical thing.
232          * If quotaoff, then we must be dealing with the root filesystem.
233          */
234         ASSERT(mp->m_quotainfo);
235         if (mp->m_quotainfo)
236                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)), PINOD);
237
238         ASSERT(mp->m_quotainfo);
239
240         /*
241          * If we're just turning off quota enforcement, change mp and go.
242          */
243         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
244                 mp->m_qflags &= ~(flags);
245
246                 s = XFS_SB_LOCK(mp);
247                 mp->m_sb.sb_qflags = mp->m_qflags;
248                 XFS_SB_UNLOCK(mp, s);
249                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
250
251                 /* XXX what to do if error ? Revert back to old vals incore ? */
252                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
253                 return (error);
254         }
255
256         dqtype = 0;
257         inactivate_flags = 0;
258         /*
259          * If accounting is off, we must turn enforcement off, clear the
260          * quota 'CHKD' certificate to make it known that we have to
261          * do a quotacheck the next time this quota is turned on.
262          */
263         if (flags & XFS_UQUOTA_ACCT) {
264                 dqtype |= XFS_QMOPT_UQUOTA;
265                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
266                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
267         }
268         if (flags & XFS_GQUOTA_ACCT) {
269                 dqtype |= XFS_QMOPT_GQUOTA;
270                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
271                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
272         } else if (flags & XFS_PQUOTA_ACCT) {
273                 dqtype |= XFS_QMOPT_PQUOTA;
274                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
275                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
276         }
277
278         /*
279          * Nothing to do?  Don't complain. This happens when we're just
280          * turning off quota enforcement.
281          */
282         if ((mp->m_qflags & flags) == 0) {
283                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
284                 return (0);
285         }
286
287         /*
288          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
289          * and synchronously.
290          */
291         xfs_qm_log_quotaoff(mp, &qoffstart, flags);
292
293         /*
294          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
295          * to take care of the race between dqget and quotaoff. We don't take
296          * any special locks to reset these bits. All processes need to check
297          * these bits *after* taking inode lock(s) to see if the particular
298          * quota type is in the process of being turned off. If *ACTIVE, it is
299          * guaranteed that all dquot structures and all quotainode ptrs will all
300          * stay valid as long as that inode is kept locked.
301          *
302          * There is no turning back after this.
303          */
304         mp->m_qflags &= ~inactivate_flags;
305
306         /*
307          * Give back all the dquot reference(s) held by inodes.
308          * Here we go thru every single incore inode in this file system, and
309          * do a dqrele on the i_udquot/i_gdquot that it may have.
310          * Essentially, as long as somebody has an inode locked, this guarantees
311          * that quotas will not be turned off. This is handy because in a
312          * transaction once we lock the inode(s) and check for quotaon, we can
313          * depend on the quota inodes (and other things) being valid as long as
314          * we keep the lock(s).
315          */
316         xfs_qm_dqrele_all_inodes(mp, flags);
317
318         /*
319          * Next we make the changes in the quota flag in the mount struct.
320          * This isn't protected by a particular lock directly, because we
321          * don't want to take a mrlock everytime we depend on quotas being on.
322          */
323         mp->m_qflags &= ~(flags);
324
325         /*
326          * Go through all the dquots of this file system and purge them,
327          * according to what was turned off. We may not be able to get rid
328          * of all dquots, because dquots can have temporary references that
329          * are not attached to inodes. eg. xfs_setattr, xfs_create.
330          * So, if we couldn't purge all the dquots from the filesystem,
331          * we can't get rid of the incore data structures.
332          */
333         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
334                 delay(10 * nculprits);
335
336         /*
337          * Transactions that had started before ACTIVE state bit was cleared
338          * could have logged many dquots, so they'd have higher LSNs than
339          * the first QUOTAOFF log record does. If we happen to crash when
340          * the tail of the log has gone past the QUOTAOFF record, but
341          * before the last dquot modification, those dquots __will__
342          * recover, and that's not good.
343          *
344          * So, we have QUOTAOFF start and end logitems; the start
345          * logitem won't get overwritten until the end logitem appears...
346          */
347         xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
348
349         /*
350          * If quotas is completely disabled, close shop.
351          */
352         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
353             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
354                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
355                 xfs_qm_destroy_quotainfo(mp);
356                 return (0);
357         }
358
359         /*
360          * Release our quotainode references, and vn_purge them,
361          * if we don't need them anymore.
362          */
363         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
364                 XFS_PURGE_INODE(XFS_QI_UQIP(mp));
365                 XFS_QI_UQIP(mp) = NULL;
366         }
367         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
368                 XFS_PURGE_INODE(XFS_QI_GQIP(mp));
369                 XFS_QI_GQIP(mp) = NULL;
370         }
371         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
372
373         return (error);
374 }
375
376 STATIC int
377 xfs_qm_scall_trunc_qfiles(
378         xfs_mount_t     *mp,
379         uint            flags)
380 {
381         int             error;
382         xfs_inode_t     *qip;
383
384         if (!capable(CAP_SYS_ADMIN))
385                 return XFS_ERROR(EPERM);
386         error = 0;
387         if (!XFS_SB_VERSION_HASQUOTA(&mp->m_sb) || flags == 0) {
388                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
389                 return XFS_ERROR(EINVAL);
390         }
391
392         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
393                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
394                 if (! error) {
395                         (void) xfs_truncate_file(mp, qip);
396                         VN_RELE(XFS_ITOV(qip));
397                 }
398         }
399
400         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
401             mp->m_sb.sb_gquotino != NULLFSINO) {
402                 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
403                 if (! error) {
404                         (void) xfs_truncate_file(mp, qip);
405                         VN_RELE(XFS_ITOV(qip));
406                 }
407         }
408
409         return (error);
410 }
411
412
413 /*
414  * Switch on (a given) quota enforcement for a filesystem.  This takes
415  * effect immediately.
416  * (Switching on quota accounting must be done at mount time.)
417  */
418 STATIC int
419 xfs_qm_scall_quotaon(
420         xfs_mount_t     *mp,
421         uint            flags)
422 {
423         int             error;
424         unsigned long   s;
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_OQUOTA_ENFD))
461             ||
462             ((flags & XFS_GQUOTA_ACCT) == 0 &&
463             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
464             (flags & XFS_OQUOTA_ENFD))) {
465                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
466                         flags, mp->m_sb.sb_qflags);
467                 return XFS_ERROR(EINVAL);
468         }
469         /*
470          * If everything's upto-date incore, then don't waste time.
471          */
472         if ((mp->m_qflags & flags) == flags)
473                 return XFS_ERROR(EEXIST);
474
475         /*
476          * Change sb_qflags on disk but not incore mp->qflags
477          * if this is the root filesystem.
478          */
479         s = XFS_SB_LOCK(mp);
480         qf = mp->m_sb.sb_qflags;
481         mp->m_sb.sb_qflags = qf | flags;
482         XFS_SB_UNLOCK(mp, s);
483
484         /*
485          * There's nothing to change if it's the same.
486          */
487         if ((qf & flags) == flags && sbflags == 0)
488                 return XFS_ERROR(EEXIST);
489         sbflags |= XFS_SB_QFLAGS;
490
491         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
492                 return (error);
493         /*
494          * If we aren't trying to switch on quota enforcement, we are done.
495          */
496         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
497              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
498              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
499              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
500              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
501              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
502             (flags & XFS_ALL_QUOTA_ENFD) == 0)
503                 return (0);
504
505         if (! XFS_IS_QUOTA_RUNNING(mp))
506                 return XFS_ERROR(ESRCH);
507
508         /*
509          * Switch on quota enforcement in core.
510          */
511         mutex_lock(&(XFS_QI_QOFFLOCK(mp)), PINOD);
512         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
513         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
514
515         return (0);
516 }
517
518
519 /*
520  * Return quota status information, such as uquota-off, enforcements, etc.
521  */
522 STATIC int
523 xfs_qm_scall_getqstat(
524         xfs_mount_t     *mp,
525         fs_quota_stat_t *out)
526 {
527         xfs_inode_t     *uip, *gip;
528         boolean_t       tempuqip, tempgqip;
529
530         uip = gip = NULL;
531         tempuqip = tempgqip = B_FALSE;
532         memset(out, 0, sizeof(fs_quota_stat_t));
533
534         out->qs_version = FS_QSTAT_VERSION;
535         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
536                 out->qs_uquota.qfs_ino = NULLFSINO;
537                 out->qs_gquota.qfs_ino = NULLFSINO;
538                 return (0);
539         }
540         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
541                                                         (XFS_ALL_QUOTA_ACCT|
542                                                          XFS_ALL_QUOTA_ENFD));
543         out->qs_pad = 0;
544         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
545         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
546
547         if (mp->m_quotainfo) {
548                 uip = mp->m_quotainfo->qi_uquotaip;
549                 gip = mp->m_quotainfo->qi_gquotaip;
550         }
551         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
552                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
553                                         0, 0, &uip, 0) == 0)
554                         tempuqip = B_TRUE;
555         }
556         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
557                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
558                                         0, 0, &gip, 0) == 0)
559                         tempgqip = B_TRUE;
560         }
561         if (uip) {
562                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
563                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
564                 if (tempuqip)
565                         VN_RELE(XFS_ITOV(uip));
566         }
567         if (gip) {
568                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
569                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
570                 if (tempgqip)
571                         VN_RELE(XFS_ITOV(gip));
572         }
573         if (mp->m_quotainfo) {
574                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
575                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
576                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
577                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
578                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
579                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
580         }
581         return (0);
582 }
583
584 /*
585  * Adjust quota limits, and start/stop timers accordingly.
586  */
587 STATIC int
588 xfs_qm_scall_setqlim(
589         xfs_mount_t             *mp,
590         xfs_dqid_t              id,
591         uint                    type,
592         fs_disk_quota_t         *newlim)
593 {
594         xfs_disk_dquot_t        *ddq;
595         xfs_dquot_t             *dqp;
596         xfs_trans_t             *tp;
597         int                     error;
598         xfs_qcnt_t              hard, soft;
599
600         if (!capable(CAP_SYS_ADMIN))
601                 return XFS_ERROR(EPERM);
602
603         if ((newlim->d_fieldmask &
604             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
605                 return (0);
606
607         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
608         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
609                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
610                 xfs_trans_cancel(tp, 0);
611                 return (error);
612         }
613
614         /*
615          * We don't want to race with a quotaoff so take the quotaoff lock.
616          * (We don't hold an inode lock, so there's nothing else to stop
617          * a quotaoff from happening). (XXXThis doesn't currently happen
618          * because we take the vfslock before calling xfs_qm_sysent).
619          */
620         mutex_lock(&(XFS_QI_QOFFLOCK(mp)), PINOD);
621
622         /*
623          * Get the dquot (locked), and join it to the transaction.
624          * Allocate the dquot if this doesn't exist.
625          */
626         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
627                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
628                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
629                 ASSERT(error != ENOENT);
630                 return (error);
631         }
632         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
633         xfs_trans_dqjoin(tp, dqp);
634         ddq = &dqp->q_core;
635
636         /*
637          * Make sure that hardlimits are >= soft limits before changing.
638          */
639         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
640                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
641                         be64_to_cpu(ddq->d_blk_hardlimit);
642         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
643                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
644                         be64_to_cpu(ddq->d_blk_softlimit);
645         if (hard == 0 || hard >= soft) {
646                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
647                 ddq->d_blk_softlimit = cpu_to_be64(soft);
648                 if (id == 0) {
649                         mp->m_quotainfo->qi_bhardlimit = hard;
650                         mp->m_quotainfo->qi_bsoftlimit = soft;
651                 }
652         } else {
653                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
654         }
655         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
656                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
657                         be64_to_cpu(ddq->d_rtb_hardlimit);
658         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
659                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
660                         be64_to_cpu(ddq->d_rtb_softlimit);
661         if (hard == 0 || hard >= soft) {
662                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
663                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
664                 if (id == 0) {
665                         mp->m_quotainfo->qi_rtbhardlimit = hard;
666                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
667                 }
668         } else {
669                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
670         }
671
672         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
673                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
674                         be64_to_cpu(ddq->d_ino_hardlimit);
675         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
676                 (xfs_qcnt_t) newlim->d_ino_softlimit :
677                         be64_to_cpu(ddq->d_ino_softlimit);
678         if (hard == 0 || hard >= soft) {
679                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
680                 ddq->d_ino_softlimit = cpu_to_be64(soft);
681                 if (id == 0) {
682                         mp->m_quotainfo->qi_ihardlimit = hard;
683                         mp->m_quotainfo->qi_isoftlimit = soft;
684                 }
685         } else {
686                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
687         }
688
689         /*
690          * Update warnings counter(s) if requested
691          */
692         if (newlim->d_fieldmask & FS_DQ_BWARNS)
693                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
694         if (newlim->d_fieldmask & FS_DQ_IWARNS)
695                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
696         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
697                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
698
699         if (id == 0) {
700                 /*
701                  * Timelimits for the super user set the relative time
702                  * the other users can be over quota for this file system.
703                  * If it is zero a default is used.  Ditto for the default
704                  * soft and hard limit values (already done, above), and
705                  * for warnings.
706                  */
707                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
708                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
709                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
710                 }
711                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
712                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
713                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
714                 }
715                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
716                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
717                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
718                 }
719                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
720                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
721                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
722                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
723                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
724                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
725         } else {
726                 /*
727                  * If the user is now over quota, start the timelimit.
728                  * The user will not be 'warned'.
729                  * Note that we keep the timers ticking, whether enforcement
730                  * is on or off. We don't really want to bother with iterating
731                  * over all ondisk dquots and turning the timers on/off.
732                  */
733                 xfs_qm_adjust_dqtimers(mp, ddq);
734         }
735         dqp->dq_flags |= XFS_DQ_DIRTY;
736         xfs_trans_log_dquot(tp, dqp);
737
738         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
739         xfs_trans_commit(tp, 0, NULL);
740         xfs_qm_dqprint(dqp);
741         xfs_qm_dqrele(dqp);
742         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
743
744         return (0);
745 }
746
747 STATIC int
748 xfs_qm_scall_getquota(
749         xfs_mount_t     *mp,
750         xfs_dqid_t      id,
751         uint            type,
752         fs_disk_quota_t *out)
753 {
754         xfs_dquot_t     *dqp;
755         int             error;
756
757         /*
758          * Try to get the dquot. We don't want it allocated on disk, so
759          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
760          * exist, we'll get ENOENT back.
761          */
762         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
763                 return (error);
764         }
765
766         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
767         /*
768          * If everything's NULL, this dquot doesn't quite exist as far as
769          * our utility programs are concerned.
770          */
771         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
772                 xfs_qm_dqput(dqp);
773                 return XFS_ERROR(ENOENT);
774         }
775         /* xfs_qm_dqprint(dqp); */
776         /*
777          * Convert the disk dquot to the exportable format
778          */
779         xfs_qm_export_dquot(mp, &dqp->q_core, out);
780         xfs_qm_dqput(dqp);
781         return (error ? XFS_ERROR(EFAULT) : 0);
782 }
783
784
785 STATIC int
786 xfs_qm_log_quotaoff_end(
787         xfs_mount_t             *mp,
788         xfs_qoff_logitem_t      *startqoff,
789         uint                    flags)
790 {
791         xfs_trans_t             *tp;
792         int                     error;
793         xfs_qoff_logitem_t      *qoffi;
794
795         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
796
797         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
798                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
799                 xfs_trans_cancel(tp, 0);
800                 return (error);
801         }
802
803         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
804                                         flags & XFS_ALL_QUOTA_ACCT);
805         xfs_trans_log_quotaoff_item(tp, qoffi);
806
807         /*
808          * We have to make sure that the transaction is secure on disk before we
809          * return and actually stop quota accounting. So, make it synchronous.
810          * We don't care about quotoff's performance.
811          */
812         xfs_trans_set_sync(tp);
813         error = xfs_trans_commit(tp, 0, NULL);
814         return (error);
815 }
816
817
818 STATIC int
819 xfs_qm_log_quotaoff(
820         xfs_mount_t            *mp,
821         xfs_qoff_logitem_t     **qoffstartp,
822         uint                   flags)
823 {
824         xfs_trans_t            *tp;
825         int                     error;
826         unsigned long   s;
827         xfs_qoff_logitem_t     *qoffi=NULL;
828         uint                    oldsbqflag=0;
829
830         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
831         if ((error = xfs_trans_reserve(tp, 0,
832                                       sizeof(xfs_qoff_logitem_t) * 2 +
833                                       mp->m_sb.sb_sectsize + 128,
834                                       0,
835                                       0,
836                                       XFS_DEFAULT_LOG_COUNT))) {
837                 goto error0;
838         }
839
840         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
841         xfs_trans_log_quotaoff_item(tp, qoffi);
842
843         s = XFS_SB_LOCK(mp);
844         oldsbqflag = mp->m_sb.sb_qflags;
845         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
846         XFS_SB_UNLOCK(mp, s);
847
848         xfs_mod_sb(tp, XFS_SB_QFLAGS);
849
850         /*
851          * We have to make sure that the transaction is secure on disk before we
852          * return and actually stop quota accounting. So, make it synchronous.
853          * We don't care about quotoff's performance.
854          */
855         xfs_trans_set_sync(tp);
856         error = xfs_trans_commit(tp, 0, NULL);
857
858 error0:
859         if (error) {
860                 xfs_trans_cancel(tp, 0);
861                 /*
862                  * No one else is modifying sb_qflags, so this is OK.
863                  * We still hold the quotaofflock.
864                  */
865                 s = XFS_SB_LOCK(mp);
866                 mp->m_sb.sb_qflags = oldsbqflag;
867                 XFS_SB_UNLOCK(mp, s);
868         }
869         *qoffstartp = qoffi;
870         return (error);
871 }
872
873
874 /*
875  * Translate an internal style on-disk-dquot to the exportable format.
876  * The main differences are that the counters/limits are all in Basic
877  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
878  * to be converted to the native endianness.
879  */
880 STATIC void
881 xfs_qm_export_dquot(
882         xfs_mount_t             *mp,
883         xfs_disk_dquot_t        *src,
884         struct fs_disk_quota    *dst)
885 {
886         memset(dst, 0, sizeof(*dst));
887         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
888         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
889         dst->d_id = be32_to_cpu(src->d_id);
890         dst->d_blk_hardlimit =
891                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
892         dst->d_blk_softlimit =
893                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
894         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
895         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
896         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
897         dst->d_icount = be64_to_cpu(src->d_icount);
898         dst->d_btimer = be32_to_cpu(src->d_btimer);
899         dst->d_itimer = be32_to_cpu(src->d_itimer);
900         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
901         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
902         dst->d_rtb_hardlimit =
903                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
904         dst->d_rtb_softlimit =
905                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
906         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
907         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
908         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
909
910         /*
911          * Internally, we don't reset all the timers when quota enforcement
912          * gets turned off. No need to confuse the userlevel code,
913          * so return zeroes in that case.
914          */
915         if (! XFS_IS_QUOTA_ENFORCED(mp)) {
916                 dst->d_btimer = 0;
917                 dst->d_itimer = 0;
918                 dst->d_rtbtimer = 0;
919         }
920
921 #ifdef DEBUG
922         if (XFS_IS_QUOTA_ENFORCED(mp) && dst->d_id != 0) {
923                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
924                     (dst->d_blk_softlimit > 0)) {
925                         ASSERT(dst->d_btimer != 0);
926                 }
927                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
928                     (dst->d_ino_softlimit > 0)) {
929                         ASSERT(dst->d_itimer != 0);
930                 }
931         }
932 #endif
933 }
934
935 STATIC uint
936 xfs_qm_import_qtype_flags(
937         uint            uflags)
938 {
939         uint            oflags = 0;
940
941         /*
942          * Can't be more than one, or none.
943          */
944         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
945                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
946             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
947                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
948             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
949                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
950             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
951                 return (0);
952
953         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
954         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
955         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
956         return oflags;
957 }
958
959 STATIC uint
960 xfs_qm_export_qtype_flags(
961         uint flags)
962 {
963         /*
964          * Can't be more than one, or none.
965          */
966         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
967                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
968         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
969                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
970         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
971                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
972         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
973
974         return (flags & XFS_DQ_USER) ?
975                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
976                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
977 }
978
979 STATIC uint
980 xfs_qm_import_flags(
981         uint uflags)
982 {
983         uint flags = 0;
984
985         if (uflags & XFS_QUOTA_UDQ_ACCT)
986                 flags |= XFS_UQUOTA_ACCT;
987         if (uflags & XFS_QUOTA_PDQ_ACCT)
988                 flags |= XFS_PQUOTA_ACCT;
989         if (uflags & XFS_QUOTA_GDQ_ACCT)
990                 flags |= XFS_GQUOTA_ACCT;
991         if (uflags & XFS_QUOTA_UDQ_ENFD)
992                 flags |= XFS_UQUOTA_ENFD;
993         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
994                 flags |= XFS_OQUOTA_ENFD;
995         return (flags);
996 }
997
998
999 STATIC uint
1000 xfs_qm_export_flags(
1001         uint flags)
1002 {
1003         uint uflags;
1004
1005         uflags = 0;
1006         if (flags & XFS_UQUOTA_ACCT)
1007                 uflags |= XFS_QUOTA_UDQ_ACCT;
1008         if (flags & XFS_PQUOTA_ACCT)
1009                 uflags |= XFS_QUOTA_PDQ_ACCT;
1010         if (flags & XFS_GQUOTA_ACCT)
1011                 uflags |= XFS_QUOTA_GDQ_ACCT;
1012         if (flags & XFS_UQUOTA_ENFD)
1013                 uflags |= XFS_QUOTA_UDQ_ENFD;
1014         if (flags & (XFS_OQUOTA_ENFD)) {
1015                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1016                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1017         }
1018         return (uflags);
1019 }
1020
1021
1022 /*
1023  * Go thru all the inodes in the file system, releasing their dquots.
1024  * Note that the mount structure gets modified to indicate that quotas are off
1025  * AFTER this, in the case of quotaoff. This also gets called from
1026  * xfs_rootumount.
1027  */
1028 void
1029 xfs_qm_dqrele_all_inodes(
1030         struct xfs_mount *mp,
1031         uint             flags)
1032 {
1033         xfs_inode_t     *ip, *topino;
1034         uint            ireclaims;
1035         vnode_t         *vp;
1036         boolean_t       vnode_refd;
1037
1038         ASSERT(mp->m_quotainfo);
1039
1040         XFS_MOUNT_ILOCK(mp);
1041 again:
1042         ip = mp->m_inodes;
1043         if (ip == NULL) {
1044                 XFS_MOUNT_IUNLOCK(mp);
1045                 return;
1046         }
1047         do {
1048                 /* Skip markers inserted by xfs_sync */
1049                 if (ip->i_mount == NULL) {
1050                         ip = ip->i_mnext;
1051                         continue;
1052                 }
1053                 /* Root inode, rbmip and rsumip have associated blocks */
1054                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1055                         ASSERT(ip->i_udquot == NULL);
1056                         ASSERT(ip->i_gdquot == NULL);
1057                         ip = ip->i_mnext;
1058                         continue;
1059                 }
1060                 vp = XFS_ITOV_NULL(ip);
1061                 if (!vp) {
1062                         ASSERT(ip->i_udquot == NULL);
1063                         ASSERT(ip->i_gdquot == NULL);
1064                         ip = ip->i_mnext;
1065                         continue;
1066                 }
1067                 vnode_refd = B_FALSE;
1068                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1069                         ireclaims = mp->m_ireclaims;
1070                         topino = mp->m_inodes;
1071                         vp = vn_grab(vp);
1072                         if (!vp)
1073                                 goto again;
1074
1075                         XFS_MOUNT_IUNLOCK(mp);
1076                         /* XXX restart limit ? */
1077                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1078                         vnode_refd = B_TRUE;
1079                 } else {
1080                         ireclaims = mp->m_ireclaims;
1081                         topino = mp->m_inodes;
1082                         XFS_MOUNT_IUNLOCK(mp);
1083                 }
1084
1085                 /*
1086                  * We don't keep the mountlock across the dqrele() call,
1087                  * since it can take a while..
1088                  */
1089                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1090                         xfs_qm_dqrele(ip->i_udquot);
1091                         ip->i_udquot = NULL;
1092                 }
1093                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1094                         xfs_qm_dqrele(ip->i_gdquot);
1095                         ip->i_gdquot = NULL;
1096                 }
1097                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1098                 /*
1099                  * Wait until we've dropped the ilock and mountlock to
1100                  * do the vn_rele. Or be condemned to an eternity in the
1101                  * inactive code in hell.
1102                  */
1103                 if (vnode_refd)
1104                         VN_RELE(vp);
1105                 XFS_MOUNT_ILOCK(mp);
1106                 /*
1107                  * If an inode was inserted or removed, we gotta
1108                  * start over again.
1109                  */
1110                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1111                         /* XXX use a sentinel */
1112                         goto again;
1113                 }
1114                 ip = ip->i_mnext;
1115         } while (ip != mp->m_inodes);
1116
1117         XFS_MOUNT_IUNLOCK(mp);
1118 }
1119
1120 /*------------------------------------------------------------------------*/
1121 #ifdef DEBUG
1122 /*
1123  * This contains all the test functions for XFS disk quotas.
1124  * Currently it does a quota accounting check. ie. it walks through
1125  * all inodes in the file system, calculating the dquot accounting fields,
1126  * and prints out any inconsistencies.
1127  */
1128 xfs_dqhash_t *qmtest_udqtab;
1129 xfs_dqhash_t *qmtest_gdqtab;
1130 int           qmtest_hashmask;
1131 int           qmtest_nfails;
1132 mutex_t       qcheck_lock;
1133
1134 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1135                                  (__psunsigned_t)(id)) & \
1136                                 (qmtest_hashmask - 1))
1137
1138 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1139                                      (qmtest_udqtab + \
1140                                       DQTEST_HASHVAL(mp, id)) : \
1141                                      (qmtest_gdqtab + \
1142                                       DQTEST_HASHVAL(mp, id)))
1143
1144 #define DQTEST_LIST_PRINT(l, NXT, title) \
1145 { \
1146           xfs_dqtest_t  *dqp; int i = 0;\
1147           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1148           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1149                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1150                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1151                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1152                          dqp->d_bcount, dqp->d_icount); } \
1153 }
1154
1155 typedef struct dqtest {
1156         xfs_dqmarker_t  q_lists;
1157         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1158         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1159         xfs_dqid_t      d_id;           /* user id or group id */
1160         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1161         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1162 } xfs_dqtest_t;
1163
1164 STATIC void
1165 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1166 {
1167         xfs_dquot_t *d;
1168         if (((d) = (h)->qh_next))
1169                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1170         (dqp)->HL_NEXT = d;
1171         (dqp)->HL_PREVP = &((h)->qh_next);
1172         (h)->qh_next = (xfs_dquot_t *)dqp;
1173         (h)->qh_version++;
1174         (h)->qh_nelems++;
1175 }
1176 STATIC void
1177 xfs_qm_dqtest_print(
1178         xfs_dqtest_t    *d)
1179 {
1180         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1181         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1182         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1183         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1184                 d->d_bcount, (int)d->d_bcount);
1185         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1186                 d->d_icount, (int)d->d_icount);
1187         cmn_err(CE_DEBUG, "---------------------------");
1188 }
1189
1190 STATIC void
1191 xfs_qm_dqtest_failed(
1192         xfs_dqtest_t    *d,
1193         xfs_dquot_t     *dqp,
1194         char            *reason,
1195         xfs_qcnt_t      a,
1196         xfs_qcnt_t      b,
1197         int             error)
1198 {
1199         qmtest_nfails++;
1200         if (error)
1201                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1202                        d->d_id, error, reason);
1203         else
1204                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1205                        d->d_id, reason, (int)a, (int)b);
1206         xfs_qm_dqtest_print(d);
1207         if (dqp)
1208                 xfs_qm_dqprint(dqp);
1209 }
1210
1211 STATIC int
1212 xfs_dqtest_cmp2(
1213         xfs_dqtest_t    *d,
1214         xfs_dquot_t     *dqp)
1215 {
1216         int err = 0;
1217         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1218                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1219                         be64_to_cpu(dqp->q_core.d_icount),
1220                         d->d_icount, 0);
1221                 err++;
1222         }
1223         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1224                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1225                         be64_to_cpu(dqp->q_core.d_bcount),
1226                         d->d_bcount, 0);
1227                 err++;
1228         }
1229         if (dqp->q_core.d_blk_softlimit &&
1230             be64_to_cpu(dqp->q_core.d_bcount) >=
1231             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1232                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1233                         cmn_err(CE_DEBUG,
1234                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1235                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1236                         err++;
1237                 }
1238         }
1239         if (dqp->q_core.d_ino_softlimit &&
1240             be64_to_cpu(dqp->q_core.d_icount) >=
1241             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1242                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1243                         cmn_err(CE_DEBUG,
1244                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1245                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1246                         err++;
1247                 }
1248         }
1249 #ifdef QUOTADEBUG
1250         if (!err) {
1251                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1252                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1253         }
1254 #endif
1255         return (err);
1256 }
1257
1258 STATIC void
1259 xfs_dqtest_cmp(
1260         xfs_dqtest_t    *d)
1261 {
1262         xfs_dquot_t     *dqp;
1263         int             error;
1264
1265         /* xfs_qm_dqtest_print(d); */
1266         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1267                                  &dqp))) {
1268                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1269                 return;
1270         }
1271         xfs_dqtest_cmp2(d, dqp);
1272         xfs_qm_dqput(dqp);
1273 }
1274
1275 STATIC int
1276 xfs_qm_internalqcheck_dqget(
1277         xfs_mount_t     *mp,
1278         xfs_dqid_t      id,
1279         uint            type,
1280         xfs_dqtest_t    **O_dq)
1281 {
1282         xfs_dqtest_t    *d;
1283         xfs_dqhash_t    *h;
1284
1285         h = DQTEST_HASH(mp, id, type);
1286         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1287              d = (xfs_dqtest_t *) d->HL_NEXT) {
1288                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1289                 if (d->d_id == id && mp == d->q_mount) {
1290                         *O_dq = d;
1291                         return (0);
1292                 }
1293         }
1294         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1295         d->dq_flags = type;
1296         d->d_id = id;
1297         d->q_mount = mp;
1298         d->q_hash = h;
1299         xfs_qm_hashinsert(h, d);
1300         *O_dq = d;
1301         return (0);
1302 }
1303
1304 STATIC void
1305 xfs_qm_internalqcheck_get_dquots(
1306         xfs_mount_t     *mp,
1307         xfs_dqid_t      uid,
1308         xfs_dqid_t      projid,
1309         xfs_dqid_t      gid,
1310         xfs_dqtest_t    **ud,
1311         xfs_dqtest_t    **gd)
1312 {
1313         if (XFS_IS_UQUOTA_ON(mp))
1314                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1315         if (XFS_IS_GQUOTA_ON(mp))
1316                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1317         else if (XFS_IS_PQUOTA_ON(mp))
1318                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1319 }
1320
1321
1322 STATIC void
1323 xfs_qm_internalqcheck_dqadjust(
1324         xfs_inode_t             *ip,
1325         xfs_dqtest_t            *d)
1326 {
1327         d->d_icount++;
1328         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1329 }
1330
1331 STATIC int
1332 xfs_qm_internalqcheck_adjust(
1333         xfs_mount_t     *mp,            /* mount point for filesystem */
1334         xfs_ino_t       ino,            /* inode number to get data for */
1335         void            __user *buffer, /* not used */
1336         int             ubsize,         /* not used */
1337         void            *private_data,  /* not used */
1338         xfs_daddr_t     bno,            /* starting block of inode cluster */
1339         int             *ubused,        /* not used */
1340         void            *dip,           /* not used */
1341         int             *res)           /* bulkstat result code */
1342 {
1343         xfs_inode_t             *ip;
1344         xfs_dqtest_t            *ud, *gd;
1345         uint                    lock_flags;
1346         boolean_t               ipreleased;
1347         int                     error;
1348
1349         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1350
1351         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1352                 *res = BULKSTAT_RV_NOTHING;
1353                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1354                         (unsigned long long) ino,
1355                         (unsigned long long) mp->m_sb.sb_uquotino,
1356                         (unsigned long long) mp->m_sb.sb_gquotino);
1357                 return XFS_ERROR(EINVAL);
1358         }
1359         ipreleased = B_FALSE;
1360  again:
1361         lock_flags = XFS_ILOCK_SHARED;
1362         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1363                 *res = BULKSTAT_RV_NOTHING;
1364                 return (error);
1365         }
1366
1367         if (ip->i_d.di_mode == 0) {
1368                 xfs_iput_new(ip, lock_flags);
1369                 *res = BULKSTAT_RV_NOTHING;
1370                 return XFS_ERROR(ENOENT);
1371         }
1372
1373         /*
1374          * This inode can have blocks after eof which can get released
1375          * when we send it to inactive. Since we don't check the dquot
1376          * until the after all our calculations are done, we must get rid
1377          * of those now.
1378          */
1379         if (! ipreleased) {
1380                 xfs_iput(ip, lock_flags);
1381                 ipreleased = B_TRUE;
1382                 goto again;
1383         }
1384         xfs_qm_internalqcheck_get_dquots(mp,
1385                                         (xfs_dqid_t) ip->i_d.di_uid,
1386                                         (xfs_dqid_t) ip->i_d.di_projid,
1387                                         (xfs_dqid_t) ip->i_d.di_gid,
1388                                         &ud, &gd);
1389         if (XFS_IS_UQUOTA_ON(mp)) {
1390                 ASSERT(ud);
1391                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1392         }
1393         if (XFS_IS_OQUOTA_ON(mp)) {
1394                 ASSERT(gd);
1395                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1396         }
1397         xfs_iput(ip, lock_flags);
1398         *res = BULKSTAT_RV_DIDONE;
1399         return (0);
1400 }
1401
1402
1403 /* PRIVATE, debugging */
1404 int
1405 xfs_qm_internalqcheck(
1406         xfs_mount_t     *mp)
1407 {
1408         xfs_ino_t       lastino;
1409         int             done, count;
1410         int             i;
1411         xfs_dqtest_t    *d, *e;
1412         xfs_dqhash_t    *h1;
1413         int             error;
1414
1415         lastino = 0;
1416         qmtest_hashmask = 32;
1417         count = 5;
1418         done = 0;
1419         qmtest_nfails = 0;
1420
1421         if (! XFS_IS_QUOTA_ON(mp))
1422                 return XFS_ERROR(ESRCH);
1423
1424         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1425         XFS_bflush(mp->m_ddev_targp);
1426         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1427         XFS_bflush(mp->m_ddev_targp);
1428
1429         mutex_lock(&qcheck_lock, PINOD);
1430         /* There should be absolutely no quota activity while this
1431            is going on. */
1432         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1433                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1434         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1435                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1436         do {
1437                 /*
1438                  * Iterate thru all the inodes in the file system,
1439                  * adjusting the corresponding dquot counters
1440                  */
1441                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1442                                  xfs_qm_internalqcheck_adjust, NULL,
1443                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1444                         break;
1445                 }
1446         } while (! done);
1447         if (error) {
1448                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1449         }
1450         cmn_err(CE_DEBUG, "Checking results against system dquots");
1451         for (i = 0; i < qmtest_hashmask; i++) {
1452                 h1 = &qmtest_udqtab[i];
1453                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1454                         xfs_dqtest_cmp(d);
1455                         e = (xfs_dqtest_t *) d->HL_NEXT;
1456                         kmem_free(d, sizeof(xfs_dqtest_t));
1457                         d = e;
1458                 }
1459                 h1 = &qmtest_gdqtab[i];
1460                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1461                         xfs_dqtest_cmp(d);
1462                         e = (xfs_dqtest_t *) d->HL_NEXT;
1463                         kmem_free(d, sizeof(xfs_dqtest_t));
1464                         d = e;
1465                 }
1466         }
1467
1468         if (qmtest_nfails) {
1469                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1470                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1471         } else {
1472                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1473         }
1474         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1475         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1476         mutex_unlock(&qcheck_lock);
1477         return (qmtest_nfails);
1478 }
1479
1480 #endif /* DEBUG */