err.no Git - linux-2.6/blob - 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         unsigned long   s;
 204         int                     error;
 205         uint                    inactivate_flags;
 206         xfs_qoff_logitem_t      *qoffstart;
 207         int                     nculprits;
 208
 209         if (!force && !capable(CAP_SYS_ADMIN))
 210                 return XFS_ERROR(EPERM);
 211         /*
 212          * No file system can have quotas enabled on disk but not in core.
 213          * Note that quota utilities (like quotaoff) _expect_
 214          * errno == EEXIST here.
 215          */
 216         if ((mp->m_qflags & flags) == 0)
 217                 return XFS_ERROR(EEXIST);
 218         error = 0;
 219
 220         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 221
 222         /*
 223          * We don't want to deal with two quotaoffs messing up each other,
 224          * so we're going to serialize it. quotaoff isn't exactly a performance
 225          * critical thing.
 226          * If quotaoff, then we must be dealing with the root filesystem.
 227          */
 228         ASSERT(mp->m_quotainfo);
 229         if (mp->m_quotainfo)
 230                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 231
 232         ASSERT(mp->m_quotainfo);
 233
 234         /*
 235          * If we're just turning off quota enforcement, change mp and go.
 236          */
 237         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
 238                 mp->m_qflags &= ~(flags);
 239
 240                 s = XFS_SB_LOCK(mp);
 241                 mp->m_sb.sb_qflags = mp->m_qflags;
 242                 XFS_SB_UNLOCK(mp, s);
 243                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 244
 245                 /* XXX what to do if error ? Revert back to old vals incore ? */
 246                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
 247                 return (error);
 248         }
 249
 250         dqtype = 0;
 251         inactivate_flags = 0;
 252         /*
 253          * If accounting is off, we must turn enforcement off, clear the
 254          * quota 'CHKD' certificate to make it known that we have to
 255          * do a quotacheck the next time this quota is turned on.
 256          */
 257         if (flags & XFS_UQUOTA_ACCT) {
 258                 dqtype |= XFS_QMOPT_UQUOTA;
 259                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
 260                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
 261         }
 262         if (flags & XFS_GQUOTA_ACCT) {
 263                 dqtype |= XFS_QMOPT_GQUOTA;
 264                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 265                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
 266         } else if (flags & XFS_PQUOTA_ACCT) {
 267                 dqtype |= XFS_QMOPT_PQUOTA;
 268                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 269                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
 270         }
 271
 272         /*
 273          * Nothing to do?  Don't complain. This happens when we're just
 274          * turning off quota enforcement.
 275          */
 276         if ((mp->m_qflags & flags) == 0) {
 277                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 278                 return (0);
 279         }
 280
 281         /*
 282          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
 283          * and synchronously.
 284          */
 285         xfs_qm_log_quotaoff(mp, &qoffstart, flags);
 286
 287         /*
 288          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
 289          * to take care of the race between dqget and quotaoff. We don't take
 290          * any special locks to reset these bits. All processes need to check
 291          * these bits *after* taking inode lock(s) to see if the particular
 292          * quota type is in the process of being turned off. If *ACTIVE, it is
 293          * guaranteed that all dquot structures and all quotainode ptrs will all
 294          * stay valid as long as that inode is kept locked.
 295          *
 296          * There is no turning back after this.
 297          */
 298         mp->m_qflags &= ~inactivate_flags;
 299
 300         /*
 301          * Give back all the dquot reference(s) held by inodes.
 302          * Here we go thru every single incore inode in this file system, and
 303          * do a dqrele on the i_udquot/i_gdquot that it may have.
 304          * Essentially, as long as somebody has an inode locked, this guarantees
 305          * that quotas will not be turned off. This is handy because in a
 306          * transaction once we lock the inode(s) and check for quotaon, we can
 307          * depend on the quota inodes (and other things) being valid as long as
 308          * we keep the lock(s).
 309          */
 310         xfs_qm_dqrele_all_inodes(mp, flags);
 311
 312         /*
 313          * Next we make the changes in the quota flag in the mount struct.
 314          * This isn't protected by a particular lock directly, because we
 315          * don't want to take a mrlock everytime we depend on quotas being on.
 316          */
 317         mp->m_qflags &= ~(flags);
 318
 319         /*
 320          * Go through all the dquots of this file system and purge them,
 321          * according to what was turned off. We may not be able to get rid
 322          * of all dquots, because dquots can have temporary references that
 323          * are not attached to inodes. eg. xfs_setattr, xfs_create.
 324          * So, if we couldn't purge all the dquots from the filesystem,
 325          * we can't get rid of the incore data structures.
 326          */
 327         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
 328                 delay(10 * nculprits);
 329
 330         /*
 331          * Transactions that had started before ACTIVE state bit was cleared
 332          * could have logged many dquots, so they'd have higher LSNs than
 333          * the first QUOTAOFF log record does. If we happen to crash when
 334          * the tail of the log has gone past the QUOTAOFF record, but
 335          * before the last dquot modification, those dquots __will__
 336          * recover, and that's not good.
 337          *
 338          * So, we have QUOTAOFF start and end logitems; the start
 339          * logitem won't get overwritten until the end logitem appears...
 340          */
 341         xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
 342
 343         /*
 344          * If quotas is completely disabled, close shop.
 345          */
 346         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
 347             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
 348                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 349                 xfs_qm_destroy_quotainfo(mp);
 350                 return (0);
 351         }
 352
 353         /*
 354          * Release our quotainode references, and vn_purge them,
 355          * if we don't need them anymore.
 356          */
 357         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
 358                 XFS_PURGE_INODE(XFS_QI_UQIP(mp));
 359                 XFS_QI_UQIP(mp) = NULL;
 360         }
 361         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
 362                 XFS_PURGE_INODE(XFS_QI_GQIP(mp));
 363                 XFS_QI_GQIP(mp) = NULL;
 364         }
 365         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 366
 367         return (error);
 368 }
 369
 370 STATIC int
 371 xfs_qm_scall_trunc_qfiles(
 372         xfs_mount_t     *mp,
 373         uint            flags)
 374 {
 375         int             error;
 376         xfs_inode_t     *qip;
 377
 378         if (!capable(CAP_SYS_ADMIN))
 379                 return XFS_ERROR(EPERM);
 380         error = 0;
 381         if (!XFS_SB_VERSION_HASQUOTA(&mp->m_sb) || flags == 0) {
 382                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
 383                 return XFS_ERROR(EINVAL);
 384         }
 385
 386         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
 387                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
 388                 if (! error) {
 389                         (void) xfs_truncate_file(mp, qip);
 390                         VN_RELE(XFS_ITOV(qip));
 391                 }
 392         }
 393
 394         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
 395             mp->m_sb.sb_gquotino != NULLFSINO) {
 396                 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
 397                 if (! error) {
 398                         (void) xfs_truncate_file(mp, qip);
 399                         VN_RELE(XFS_ITOV(qip));
 400                 }
 401         }
 402
 403         return (error);
 404 }
 405
 406
 407 /*
 408  * Switch on (a given) quota enforcement for a filesystem.  This takes
 409  * effect immediately.
 410  * (Switching on quota accounting must be done at mount time.)
 411  */
 412 STATIC int
 413 xfs_qm_scall_quotaon(
 414         xfs_mount_t     *mp,
 415         uint            flags)
 416 {
 417         int             error;
 418         unsigned long   s;
 419         uint            qf;
 420         uint            accflags;
 421         __int64_t       sbflags;
 422
 423         if (!capable(CAP_SYS_ADMIN))
 424                 return XFS_ERROR(EPERM);
 425
 426         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 427         /*
 428          * Switching on quota accounting must be done at mount time.
 429          */
 430         accflags = flags & XFS_ALL_QUOTA_ACCT;
 431         flags &= ~(XFS_ALL_QUOTA_ACCT);
 432
 433         sbflags = 0;
 434
 435         if (flags == 0) {
 436                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
 437                 return XFS_ERROR(EINVAL);
 438         }
 439
 440         /* No fs can turn on quotas with a delayed effect */
 441         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 442
 443         /*
 444          * Can't enforce without accounting. We check the superblock
 445          * qflags here instead of m_qflags because rootfs can have
 446          * quota acct on ondisk without m_qflags' knowing.
 447          */
 448         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 449             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 450             (flags & XFS_UQUOTA_ENFD))
 451             ||
 452             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 453             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 454             (flags & XFS_GQUOTA_ACCT) == 0 &&
 455             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 456             (flags & XFS_OQUOTA_ENFD))) {
 457                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 458                         flags, mp->m_sb.sb_qflags);
 459                 return XFS_ERROR(EINVAL);
 460         }
 461         /*
 462          * If everything's upto-date incore, then don't waste time.
 463          */
 464         if ((mp->m_qflags & flags) == flags)
 465                 return XFS_ERROR(EEXIST);
 466
 467         /*
 468          * Change sb_qflags on disk but not incore mp->qflags
 469          * if this is the root filesystem.
 470          */
 471         s = XFS_SB_LOCK(mp);
 472         qf = mp->m_sb.sb_qflags;
 473         mp->m_sb.sb_qflags = qf | flags;
 474         XFS_SB_UNLOCK(mp, s);
 475
 476         /*
 477          * There's nothing to change if it's the same.
 478          */
 479         if ((qf & flags) == flags && sbflags == 0)
 480                 return XFS_ERROR(EEXIST);
 481         sbflags |= XFS_SB_QFLAGS;
 482
 483         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 484                 return (error);
 485         /*
 486          * If we aren't trying to switch on quota enforcement, we are done.
 487          */
 488         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 489              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 490              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 491              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 492              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 493              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 494             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 495                 return (0);
 496
 497         if (! XFS_IS_QUOTA_RUNNING(mp))
 498                 return XFS_ERROR(ESRCH);
 499
 500         /*
 501          * Switch on quota enforcement in core.
 502          */
 503         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 504         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 505         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 506
 507         return (0);
 508 }
 509
 510
 511 /*
 512  * Return quota status information, such as uquota-off, enforcements, etc.
 513  */
 514 STATIC int
 515 xfs_qm_scall_getqstat(
 516         xfs_mount_t     *mp,
 517         fs_quota_stat_t *out)
 518 {
 519         xfs_inode_t     *uip, *gip;
 520         boolean_t       tempuqip, tempgqip;
 521
 522         uip = gip = NULL;
 523         tempuqip = tempgqip = B_FALSE;
 524         memset(out, 0, sizeof(fs_quota_stat_t));
 525
 526         out->qs_version = FS_QSTAT_VERSION;
 527         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
 528                 out->qs_uquota.qfs_ino = NULLFSINO;
 529                 out->qs_gquota.qfs_ino = NULLFSINO;
 530                 return (0);
 531         }
 532         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 533                                                         (XFS_ALL_QUOTA_ACCT|
 534                                                          XFS_ALL_QUOTA_ENFD));
 535         out->qs_pad = 0;
 536         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 537         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 538
 539         if (mp->m_quotainfo) {
 540                 uip = mp->m_quotainfo->qi_uquotaip;
 541                 gip = mp->m_quotainfo->qi_gquotaip;
 542         }
 543         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 544                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 545                                         0, 0, &uip, 0) == 0)
 546                         tempuqip = B_TRUE;
 547         }
 548         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 549                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 550                                         0, 0, &gip, 0) == 0)
 551                         tempgqip = B_TRUE;
 552         }
 553         if (uip) {
 554                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 555                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 556                 if (tempuqip)
 557                         VN_RELE(XFS_ITOV(uip));
 558         }
 559         if (gip) {
 560                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 561                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 562                 if (tempgqip)
 563                         VN_RELE(XFS_ITOV(gip));
 564         }
 565         if (mp->m_quotainfo) {
 566                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 567                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 568                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 569                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 570                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 571                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 572         }
 573         return (0);
 574 }
 575
 576 /*
 577  * Adjust quota limits, and start/stop timers accordingly.
 578  */
 579 STATIC int
 580 xfs_qm_scall_setqlim(
 581         xfs_mount_t             *mp,
 582         xfs_dqid_t              id,
 583         uint                    type,
 584         fs_disk_quota_t         *newlim)
 585 {
 586         xfs_disk_dquot_t        *ddq;
 587         xfs_dquot_t             *dqp;
 588         xfs_trans_t             *tp;
 589         int                     error;
 590         xfs_qcnt_t              hard, soft;
 591
 592         if (!capable(CAP_SYS_ADMIN))
 593                 return XFS_ERROR(EPERM);
 594
 595         if ((newlim->d_fieldmask &
 596             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 597                 return (0);
 598
 599         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 600         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 601                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 602                 xfs_trans_cancel(tp, 0);
 603                 return (error);
 604         }
 605
 606         /*
 607          * We don't want to race with a quotaoff so take the quotaoff lock.
 608          * (We don't hold an inode lock, so there's nothing else to stop
 609          * a quotaoff from happening). (XXXThis doesn't currently happen
 610          * because we take the vfslock before calling xfs_qm_sysent).
 611          */
 612         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 613
 614         /*
 615          * Get the dquot (locked), and join it to the transaction.
 616          * Allocate the dquot if this doesn't exist.
 617          */
 618         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 619                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 620                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 621                 ASSERT(error != ENOENT);
 622                 return (error);
 623         }
 624         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 625         xfs_trans_dqjoin(tp, dqp);
 626         ddq = &dqp->q_core;
 627
 628         /*
 629          * Make sure that hardlimits are >= soft limits before changing.
 630          */
 631         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 632                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 633                         be64_to_cpu(ddq->d_blk_hardlimit);
 634         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 635                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 636                         be64_to_cpu(ddq->d_blk_softlimit);
 637         if (hard == 0 || hard >= soft) {
 638                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 639                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 640                 if (id == 0) {
 641                         mp->m_quotainfo->qi_bhardlimit = hard;
 642                         mp->m_quotainfo->qi_bsoftlimit = soft;
 643                 }
 644         } else {
 645                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 646         }
 647         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 648                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 649                         be64_to_cpu(ddq->d_rtb_hardlimit);
 650         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 651                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 652                         be64_to_cpu(ddq->d_rtb_softlimit);
 653         if (hard == 0 || hard >= soft) {
 654                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 655                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 656                 if (id == 0) {
 657                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 658                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 659                 }
 660         } else {
 661                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 662         }
 663
 664         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 665                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 666                         be64_to_cpu(ddq->d_ino_hardlimit);
 667         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 668                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 669                         be64_to_cpu(ddq->d_ino_softlimit);
 670         if (hard == 0 || hard >= soft) {
 671                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 672                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 673                 if (id == 0) {
 674                         mp->m_quotainfo->qi_ihardlimit = hard;
 675                         mp->m_quotainfo->qi_isoftlimit = soft;
 676                 }
 677         } else {
 678                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 679         }
 680
 681         /*
 682          * Update warnings counter(s) if requested
 683          */
 684         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 685                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 686         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 687                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 688         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 689                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 690
 691         if (id == 0) {
 692                 /*
 693                  * Timelimits for the super user set the relative time
 694                  * the other users can be over quota for this file system.
 695                  * If it is zero a default is used.  Ditto for the default
 696                  * soft and hard limit values (already done, above), and
 697                  * for warnings.
 698                  */
 699                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 700                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 701                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 702                 }
 703                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 704                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 705                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 706                 }
 707                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 708                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 709                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 710                 }
 711                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 712                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 713                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 714                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 715                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 716                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 717         } else {
 718                 /*
 719                  * If the user is now over quota, start the timelimit.
 720                  * The user will not be 'warned'.
 721                  * Note that we keep the timers ticking, whether enforcement
 722                  * is on or off. We don't really want to bother with iterating
 723                  * over all ondisk dquots and turning the timers on/off.
 724                  */
 725                 xfs_qm_adjust_dqtimers(mp, ddq);
 726         }
 727         dqp->dq_flags |= XFS_DQ_DIRTY;
 728         xfs_trans_log_dquot(tp, dqp);
 729
 730         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 731         xfs_trans_commit(tp, 0);
 732         xfs_qm_dqprint(dqp);
 733         xfs_qm_dqrele(dqp);
 734         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 735
 736         return (0);
 737 }
 738
 739 STATIC int
 740 xfs_qm_scall_getquota(
 741         xfs_mount_t     *mp,
 742         xfs_dqid_t      id,
 743         uint            type,
 744         fs_disk_quota_t *out)
 745 {
 746         xfs_dquot_t     *dqp;
 747         int             error;
 748
 749         /*
 750          * Try to get the dquot. We don't want it allocated on disk, so
 751          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 752          * exist, we'll get ENOENT back.
 753          */
 754         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 755                 return (error);
 756         }
 757
 758         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 759         /*
 760          * If everything's NULL, this dquot doesn't quite exist as far as
 761          * our utility programs are concerned.
 762          */
 763         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 764                 xfs_qm_dqput(dqp);
 765                 return XFS_ERROR(ENOENT);
 766         }
 767         /* xfs_qm_dqprint(dqp); */
 768         /*
 769          * Convert the disk dquot to the exportable format
 770          */
 771         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 772         xfs_qm_dqput(dqp);
 773         return (error ? XFS_ERROR(EFAULT) : 0);
 774 }
 775
 776
 777 STATIC int
 778 xfs_qm_log_quotaoff_end(
 779         xfs_mount_t             *mp,
 780         xfs_qoff_logitem_t      *startqoff,
 781         uint                    flags)
 782 {
 783         xfs_trans_t             *tp;
 784         int                     error;
 785         xfs_qoff_logitem_t      *qoffi;
 786
 787         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 788
 789         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 790                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 791                 xfs_trans_cancel(tp, 0);
 792                 return (error);
 793         }
 794
 795         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 796                                         flags & XFS_ALL_QUOTA_ACCT);
 797         xfs_trans_log_quotaoff_item(tp, qoffi);
 798
 799         /*
 800          * We have to make sure that the transaction is secure on disk before we
 801          * return and actually stop quota accounting. So, make it synchronous.
 802          * We don't care about quotoff's performance.
 803          */
 804         xfs_trans_set_sync(tp);
 805         error = xfs_trans_commit(tp, 0);
 806         return (error);
 807 }
 808
 809
 810 STATIC int
 811 xfs_qm_log_quotaoff(
 812         xfs_mount_t            *mp,
 813         xfs_qoff_logitem_t     **qoffstartp,
 814         uint                   flags)
 815 {
 816         xfs_trans_t            *tp;
 817         int                     error;
 818         unsigned long   s;
 819         xfs_qoff_logitem_t     *qoffi=NULL;
 820         uint                    oldsbqflag=0;
 821
 822         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 823         if ((error = xfs_trans_reserve(tp, 0,
 824                                       sizeof(xfs_qoff_logitem_t) * 2 +
 825                                       mp->m_sb.sb_sectsize + 128,
 826                                       0,
 827                                       0,
 828                                       XFS_DEFAULT_LOG_COUNT))) {
 829                 goto error0;
 830         }
 831
 832         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 833         xfs_trans_log_quotaoff_item(tp, qoffi);
 834
 835         s = XFS_SB_LOCK(mp);
 836         oldsbqflag = mp->m_sb.sb_qflags;
 837         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 838         XFS_SB_UNLOCK(mp, s);
 839
 840         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 841
 842         /*
 843          * We have to make sure that the transaction is secure on disk before we
 844          * return and actually stop quota accounting. So, make it synchronous.
 845          * We don't care about quotoff's performance.
 846          */
 847         xfs_trans_set_sync(tp);
 848         error = xfs_trans_commit(tp, 0);
 849
 850 error0:
 851         if (error) {
 852                 xfs_trans_cancel(tp, 0);
 853                 /*
 854                  * No one else is modifying sb_qflags, so this is OK.
 855                  * We still hold the quotaofflock.
 856                  */
 857                 s = XFS_SB_LOCK(mp);
 858                 mp->m_sb.sb_qflags = oldsbqflag;
 859                 XFS_SB_UNLOCK(mp, s);
 860         }
 861         *qoffstartp = qoffi;
 862         return (error);
 863 }
 864
 865
 866 /*
 867  * Translate an internal style on-disk-dquot to the exportable format.
 868  * The main differences are that the counters/limits are all in Basic
 869  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 870  * to be converted to the native endianness.
 871  */
 872 STATIC void
 873 xfs_qm_export_dquot(
 874         xfs_mount_t             *mp,
 875         xfs_disk_dquot_t        *src,
 876         struct fs_disk_quota    *dst)
 877 {
 878         memset(dst, 0, sizeof(*dst));
 879         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 880         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 881         dst->d_id = be32_to_cpu(src->d_id);
 882         dst->d_blk_hardlimit =
 883                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 884         dst->d_blk_softlimit =
 885                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 886         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 887         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 888         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 889         dst->d_icount = be64_to_cpu(src->d_icount);
 890         dst->d_btimer = be32_to_cpu(src->d_btimer);
 891         dst->d_itimer = be32_to_cpu(src->d_itimer);
 892         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 893         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 894         dst->d_rtb_hardlimit =
 895                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 896         dst->d_rtb_softlimit =
 897                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 898         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 899         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 900         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 901
 902         /*
 903          * Internally, we don't reset all the timers when quota enforcement
 904          * gets turned off. No need to confuse the user level code,
 905          * so return zeroes in that case.
 906          */
 907         if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
 908             (!XFS_IS_OQUOTA_ENFORCED(mp) &&
 909                         (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
 910                 dst->d_btimer = 0;
 911                 dst->d_itimer = 0;
 912                 dst->d_rtbtimer = 0;
 913         }
 914
 915 #ifdef DEBUG
 916         if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == XFS_USER_QUOTA) ||
 917              (XFS_IS_OQUOTA_ENFORCED(mp) &&
 918                         (dst->d_flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)))) &&
 919             dst->d_id != 0) {
 920                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 921                     (dst->d_blk_softlimit > 0)) {
 922                         ASSERT(dst->d_btimer != 0);
 923                 }
 924                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 925                     (dst->d_ino_softlimit > 0)) {
 926                         ASSERT(dst->d_itimer != 0);
 927                 }
 928         }
 929 #endif
 930 }
 931
 932 STATIC uint
 933 xfs_qm_import_qtype_flags(
 934         uint            uflags)
 935 {
 936         uint            oflags = 0;
 937
 938         /*
 939          * Can't be more than one, or none.
 940          */
 941         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 942                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 943             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 944                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 945             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 946                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 947             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 948                 return (0);
 949
 950         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 951         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 952         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 953         return oflags;
 954 }
 955
 956 STATIC uint
 957 xfs_qm_export_qtype_flags(
 958         uint flags)
 959 {
 960         /*
 961          * Can't be more than one, or none.
 962          */
 963         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 964                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 965         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 966                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 967         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 968                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 969         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 970
 971         return (flags & XFS_DQ_USER) ?
 972                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 973                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 974 }
 975
 976 STATIC uint
 977 xfs_qm_import_flags(
 978         uint uflags)
 979 {
 980         uint flags = 0;
 981
 982         if (uflags & XFS_QUOTA_UDQ_ACCT)
 983                 flags |= XFS_UQUOTA_ACCT;
 984         if (uflags & XFS_QUOTA_PDQ_ACCT)
 985                 flags |= XFS_PQUOTA_ACCT;
 986         if (uflags & XFS_QUOTA_GDQ_ACCT)
 987                 flags |= XFS_GQUOTA_ACCT;
 988         if (uflags & XFS_QUOTA_UDQ_ENFD)
 989                 flags |= XFS_UQUOTA_ENFD;
 990         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 991                 flags |= XFS_OQUOTA_ENFD;
 992         return (flags);
 993 }
 994
 995
 996 STATIC uint
 997 xfs_qm_export_flags(
 998         uint flags)
 999 {
1000         uint uflags;
1001
1002         uflags = 0;
1003         if (flags & XFS_UQUOTA_ACCT)
1004                 uflags |= XFS_QUOTA_UDQ_ACCT;
1005         if (flags & XFS_PQUOTA_ACCT)
1006                 uflags |= XFS_QUOTA_PDQ_ACCT;
1007         if (flags & XFS_GQUOTA_ACCT)
1008                 uflags |= XFS_QUOTA_GDQ_ACCT;
1009         if (flags & XFS_UQUOTA_ENFD)
1010                 uflags |= XFS_QUOTA_UDQ_ENFD;
1011         if (flags & (XFS_OQUOTA_ENFD)) {
1012                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1013                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1014         }
1015         return (uflags);
1016 }
1017
1018
1019 /*
1020  * Go thru all the inodes in the file system, releasing their dquots.
1021  * Note that the mount structure gets modified to indicate that quotas are off
1022  * AFTER this, in the case of quotaoff. This also gets called from
1023  * xfs_rootumount.
1024  */
1025 void
1026 xfs_qm_dqrele_all_inodes(
1027         struct xfs_mount *mp,
1028         uint             flags)
1029 {
1030         xfs_inode_t     *ip, *topino;
1031         uint            ireclaims;
1032         bhv_vnode_t     *vp;
1033         boolean_t       vnode_refd;
1034
1035         ASSERT(mp->m_quotainfo);
1036
1037         XFS_MOUNT_ILOCK(mp);
1038 again:
1039         ip = mp->m_inodes;
1040         if (ip == NULL) {
1041                 XFS_MOUNT_IUNLOCK(mp);
1042                 return;
1043         }
1044         do {
1045                 /* Skip markers inserted by xfs_sync */
1046                 if (ip->i_mount == NULL) {
1047                         ip = ip->i_mnext;
1048                         continue;
1049                 }
1050                 /* Root inode, rbmip and rsumip have associated blocks */
1051                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1052                         ASSERT(ip->i_udquot == NULL);
1053                         ASSERT(ip->i_gdquot == NULL);
1054                         ip = ip->i_mnext;
1055                         continue;
1056                 }
1057                 vp = XFS_ITOV_NULL(ip);
1058                 if (!vp) {
1059                         ASSERT(ip->i_udquot == NULL);
1060                         ASSERT(ip->i_gdquot == NULL);
1061                         ip = ip->i_mnext;
1062                         continue;
1063                 }
1064                 vnode_refd = B_FALSE;
1065                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1066                         ireclaims = mp->m_ireclaims;
1067                         topino = mp->m_inodes;
1068                         vp = vn_grab(vp);
1069                         if (!vp)
1070                                 goto again;
1071
1072                         XFS_MOUNT_IUNLOCK(mp);
1073                         /* XXX restart limit ? */
1074                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1075                         vnode_refd = B_TRUE;
1076                 } else {
1077                         ireclaims = mp->m_ireclaims;
1078                         topino = mp->m_inodes;
1079                         XFS_MOUNT_IUNLOCK(mp);
1080                 }
1081
1082                 /*
1083                  * We don't keep the mountlock across the dqrele() call,
1084                  * since it can take a while..
1085                  */
1086                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1087                         xfs_qm_dqrele(ip->i_udquot);
1088                         ip->i_udquot = NULL;
1089                 }
1090                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1091                         xfs_qm_dqrele(ip->i_gdquot);
1092                         ip->i_gdquot = NULL;
1093                 }
1094                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1095                 /*
1096                  * Wait until we've dropped the ilock and mountlock to
1097                  * do the vn_rele. Or be condemned to an eternity in the
1098                  * inactive code in hell.
1099                  */
1100                 if (vnode_refd)
1101                         VN_RELE(vp);
1102                 XFS_MOUNT_ILOCK(mp);
1103                 /*
1104                  * If an inode was inserted or removed, we gotta
1105                  * start over again.
1106                  */
1107                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1108                         /* XXX use a sentinel */
1109                         goto again;
1110                 }
1111                 ip = ip->i_mnext;
1112         } while (ip != mp->m_inodes);
1113
1114         XFS_MOUNT_IUNLOCK(mp);
1115 }
1116
1117 /*------------------------------------------------------------------------*/
1118 #ifdef DEBUG
1119 /*
1120  * This contains all the test functions for XFS disk quotas.
1121  * Currently it does a quota accounting check. ie. it walks through
1122  * all inodes in the file system, calculating the dquot accounting fields,
1123  * and prints out any inconsistencies.
1124  */
1125 xfs_dqhash_t *qmtest_udqtab;
1126 xfs_dqhash_t *qmtest_gdqtab;
1127 int           qmtest_hashmask;
1128 int           qmtest_nfails;
1129 mutex_t       qcheck_lock;
1130
1131 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1132                                  (__psunsigned_t)(id)) & \
1133                                 (qmtest_hashmask - 1))
1134
1135 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1136                                      (qmtest_udqtab + \
1137                                       DQTEST_HASHVAL(mp, id)) : \
1138                                      (qmtest_gdqtab + \
1139                                       DQTEST_HASHVAL(mp, id)))
1140
1141 #define DQTEST_LIST_PRINT(l, NXT, title) \
1142 { \
1143           xfs_dqtest_t  *dqp; int i = 0;\
1144           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1145           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1146                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1147                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1148                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1149                          dqp->d_bcount, dqp->d_icount); } \
1150 }
1151
1152 typedef struct dqtest {
1153         xfs_dqmarker_t  q_lists;
1154         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1155         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1156         xfs_dqid_t      d_id;           /* user id or group id */
1157         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1158         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1159 } xfs_dqtest_t;
1160
1161 STATIC void
1162 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1163 {
1164         xfs_dquot_t *d;
1165         if (((d) = (h)->qh_next))
1166                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1167         (dqp)->HL_NEXT = d;
1168         (dqp)->HL_PREVP = &((h)->qh_next);
1169         (h)->qh_next = (xfs_dquot_t *)dqp;
1170         (h)->qh_version++;
1171         (h)->qh_nelems++;
1172 }
1173 STATIC void
1174 xfs_qm_dqtest_print(
1175         xfs_dqtest_t    *d)
1176 {
1177         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1178         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1179         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1180         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1181                 d->d_bcount, (int)d->d_bcount);
1182         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1183                 d->d_icount, (int)d->d_icount);
1184         cmn_err(CE_DEBUG, "---------------------------");
1185 }
1186
1187 STATIC void
1188 xfs_qm_dqtest_failed(
1189         xfs_dqtest_t    *d,
1190         xfs_dquot_t     *dqp,
1191         char            *reason,
1192         xfs_qcnt_t      a,
1193         xfs_qcnt_t      b,
1194         int             error)
1195 {
1196         qmtest_nfails++;
1197         if (error)
1198                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1199                        d->d_id, error, reason);
1200         else
1201                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1202                        d->d_id, reason, (int)a, (int)b);
1203         xfs_qm_dqtest_print(d);
1204         if (dqp)
1205                 xfs_qm_dqprint(dqp);
1206 }
1207
1208 STATIC int
1209 xfs_dqtest_cmp2(
1210         xfs_dqtest_t    *d,
1211         xfs_dquot_t     *dqp)
1212 {
1213         int err = 0;
1214         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1215                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1216                         be64_to_cpu(dqp->q_core.d_icount),
1217                         d->d_icount, 0);
1218                 err++;
1219         }
1220         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1221                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1222                         be64_to_cpu(dqp->q_core.d_bcount),
1223                         d->d_bcount, 0);
1224                 err++;
1225         }
1226         if (dqp->q_core.d_blk_softlimit &&
1227             be64_to_cpu(dqp->q_core.d_bcount) >=
1228             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1229                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1230                         cmn_err(CE_DEBUG,
1231                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1232                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1233                         err++;
1234                 }
1235         }
1236         if (dqp->q_core.d_ino_softlimit &&
1237             be64_to_cpu(dqp->q_core.d_icount) >=
1238             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1239                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1240                         cmn_err(CE_DEBUG,
1241                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1242                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1243                         err++;
1244                 }
1245         }
1246 #ifdef QUOTADEBUG
1247         if (!err) {
1248                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1249                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1250         }
1251 #endif
1252         return (err);
1253 }
1254
1255 STATIC void
1256 xfs_dqtest_cmp(
1257         xfs_dqtest_t    *d)
1258 {
1259         xfs_dquot_t     *dqp;
1260         int             error;
1261
1262         /* xfs_qm_dqtest_print(d); */
1263         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1264                                  &dqp))) {
1265                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1266                 return;
1267         }
1268         xfs_dqtest_cmp2(d, dqp);
1269         xfs_qm_dqput(dqp);
1270 }
1271
1272 STATIC int
1273 xfs_qm_internalqcheck_dqget(
1274         xfs_mount_t     *mp,
1275         xfs_dqid_t      id,
1276         uint            type,
1277         xfs_dqtest_t    **O_dq)
1278 {
1279         xfs_dqtest_t    *d;
1280         xfs_dqhash_t    *h;
1281
1282         h = DQTEST_HASH(mp, id, type);
1283         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1284              d = (xfs_dqtest_t *) d->HL_NEXT) {
1285                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1286                 if (d->d_id == id && mp == d->q_mount) {
1287                         *O_dq = d;
1288                         return (0);
1289                 }
1290         }
1291         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1292         d->dq_flags = type;
1293         d->d_id = id;
1294         d->q_mount = mp;
1295         d->q_hash = h;
1296         xfs_qm_hashinsert(h, d);
1297         *O_dq = d;
1298         return (0);
1299 }
1300
1301 STATIC void
1302 xfs_qm_internalqcheck_get_dquots(
1303         xfs_mount_t     *mp,
1304         xfs_dqid_t      uid,
1305         xfs_dqid_t      projid,
1306         xfs_dqid_t      gid,
1307         xfs_dqtest_t    **ud,
1308         xfs_dqtest_t    **gd)
1309 {
1310         if (XFS_IS_UQUOTA_ON(mp))
1311                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1312         if (XFS_IS_GQUOTA_ON(mp))
1313                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1314         else if (XFS_IS_PQUOTA_ON(mp))
1315                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1316 }
1317
1318
1319 STATIC void
1320 xfs_qm_internalqcheck_dqadjust(
1321         xfs_inode_t             *ip,
1322         xfs_dqtest_t            *d)
1323 {
1324         d->d_icount++;
1325         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1326 }
1327
1328 STATIC int
1329 xfs_qm_internalqcheck_adjust(
1330         xfs_mount_t     *mp,            /* mount point for filesystem */
1331         xfs_ino_t       ino,            /* inode number to get data for */
1332         void            __user *buffer, /* not used */
1333         int             ubsize,         /* not used */
1334         void            *private_data,  /* not used */
1335         xfs_daddr_t     bno,            /* starting block of inode cluster */
1336         int             *ubused,        /* not used */
1337         void            *dip,           /* not used */
1338         int             *res)           /* bulkstat result code */
1339 {
1340         xfs_inode_t             *ip;
1341         xfs_dqtest_t            *ud, *gd;
1342         uint                    lock_flags;
1343         boolean_t               ipreleased;
1344         int                     error;
1345
1346         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1347
1348         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1349                 *res = BULKSTAT_RV_NOTHING;
1350                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1351                         (unsigned long long) ino,
1352                         (unsigned long long) mp->m_sb.sb_uquotino,
1353                         (unsigned long long) mp->m_sb.sb_gquotino);
1354                 return XFS_ERROR(EINVAL);
1355         }
1356         ipreleased = B_FALSE;
1357  again:
1358         lock_flags = XFS_ILOCK_SHARED;
1359         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1360                 *res = BULKSTAT_RV_NOTHING;
1361                 return (error);
1362         }
1363
1364         if (ip->i_d.di_mode == 0) {
1365                 xfs_iput_new(ip, lock_flags);
1366                 *res = BULKSTAT_RV_NOTHING;
1367                 return XFS_ERROR(ENOENT);
1368         }
1369
1370         /*
1371          * This inode can have blocks after eof which can get released
1372          * when we send it to inactive. Since we don't check the dquot
1373          * until the after all our calculations are done, we must get rid
1374          * of those now.
1375          */
1376         if (! ipreleased) {
1377                 xfs_iput(ip, lock_flags);
1378                 ipreleased = B_TRUE;
1379                 goto again;
1380         }
1381         xfs_qm_internalqcheck_get_dquots(mp,
1382                                         (xfs_dqid_t) ip->i_d.di_uid,
1383                                         (xfs_dqid_t) ip->i_d.di_projid,
1384                                         (xfs_dqid_t) ip->i_d.di_gid,
1385                                         &ud, &gd);
1386         if (XFS_IS_UQUOTA_ON(mp)) {
1387                 ASSERT(ud);
1388                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1389         }
1390         if (XFS_IS_OQUOTA_ON(mp)) {
1391                 ASSERT(gd);
1392                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1393         }
1394         xfs_iput(ip, lock_flags);
1395         *res = BULKSTAT_RV_DIDONE;
1396         return (0);
1397 }
1398
1399
1400 /* PRIVATE, debugging */
1401 int
1402 xfs_qm_internalqcheck(
1403         xfs_mount_t     *mp)
1404 {
1405         xfs_ino_t       lastino;
1406         int             done, count;
1407         int             i;
1408         xfs_dqtest_t    *d, *e;
1409         xfs_dqhash_t    *h1;
1410         int             error;
1411
1412         lastino = 0;
1413         qmtest_hashmask = 32;
1414         count = 5;
1415         done = 0;
1416         qmtest_nfails = 0;
1417
1418         if (! XFS_IS_QUOTA_ON(mp))
1419                 return XFS_ERROR(ESRCH);
1420
1421         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1422         XFS_bflush(mp->m_ddev_targp);
1423         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1424         XFS_bflush(mp->m_ddev_targp);
1425
1426         mutex_lock(&qcheck_lock);
1427         /* There should be absolutely no quota activity while this
1428            is going on. */
1429         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1430                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1431         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1432                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1433         do {
1434                 /*
1435                  * Iterate thru all the inodes in the file system,
1436                  * adjusting the corresponding dquot counters
1437                  */
1438                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1439                                  xfs_qm_internalqcheck_adjust, NULL,
1440                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1441                         break;
1442                 }
1443         } while (! done);
1444         if (error) {
1445                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1446         }
1447         cmn_err(CE_DEBUG, "Checking results against system dquots");
1448         for (i = 0; i < qmtest_hashmask; i++) {
1449                 h1 = &qmtest_udqtab[i];
1450                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1451                         xfs_dqtest_cmp(d);
1452                         e = (xfs_dqtest_t *) d->HL_NEXT;
1453                         kmem_free(d, sizeof(xfs_dqtest_t));
1454                         d = e;
1455                 }
1456                 h1 = &qmtest_gdqtab[i];
1457                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1458                         xfs_dqtest_cmp(d);
1459                         e = (xfs_dqtest_t *) d->HL_NEXT;
1460                         kmem_free(d, sizeof(xfs_dqtest_t));
1461                         d = e;
1462                 }
1463         }
1464
1465         if (qmtest_nfails) {
1466                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1467                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1468         } else {
1469                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1470         }
1471         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1472         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1473         mutex_unlock(&qcheck_lock);
1474         return (qmtest_nfails);
1475 }
1476
1477 #endif /* DEBUG */