fs/xfs/quota/xfs_qm_syscalls.c

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <linux/capability.h>
  20
  21 #include "xfs.h"
  22 #include "xfs_fs.h"
  23 #include "xfs_bit.h"
  24 #include "xfs_log.h"
  25 #include "xfs_inum.h"
  26 #include "xfs_trans.h"
  27 #include "xfs_sb.h"
  28 #include "xfs_ag.h"
  29 #include "xfs_dir2.h"
  30 #include "xfs_alloc.h"
  31 #include "xfs_dmapi.h"
  32 #include "xfs_quota.h"
  33 #include "xfs_mount.h"
  34 #include "xfs_bmap_btree.h"
  35 #include "xfs_alloc_btree.h"
  36 #include "xfs_ialloc_btree.h"
  37 #include "xfs_dir2_sf.h"
  38 #include "xfs_attr_sf.h"
  39 #include "xfs_dinode.h"
  40 #include "xfs_inode.h"
  41 #include "xfs_ialloc.h"
  42 #include "xfs_itable.h"
  43 #include "xfs_bmap.h"
  44 #include "xfs_btree.h"
  45 #include "xfs_rtalloc.h"
  46 #include "xfs_error.h"
  47 #include "xfs_rw.h"
  48 #include "xfs_acl.h"
  49 #include "xfs_attr.h"
  50 #include "xfs_buf_item.h"
  51 #include "xfs_utils.h"
  52 #include "xfs_qm.h"
  53
  54 #ifdef DEBUG
  55 # define qdprintk(s, args...)   cmn_err(CE_DEBUG, s, ## args)
  56 #else
  57 # define qdprintk(s, args...)   do { } while (0)
  58 #endif
  59
  60 STATIC int      xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
  61 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
  62                                         fs_disk_quota_t *);
  63 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
  64 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
  65                                         fs_disk_quota_t *);
  66 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
  67 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
  68 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
  69 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
  70                                         uint);
  71 STATIC uint     xfs_qm_import_flags(uint);
  72 STATIC uint     xfs_qm_export_flags(uint);
  73 STATIC uint     xfs_qm_import_qtype_flags(uint);
  74 STATIC uint     xfs_qm_export_qtype_flags(uint);
  75 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
  76                                         fs_disk_quota_t *);
  77
  78
  79 /*
  80  * The main distribution switch of all XFS quotactl system calls.
  81  */
  82 int
  83 xfs_qm_quotactl(
  84         xfs_mount_t     *mp,
  85         int             cmd,
  86         int             id,
  87         xfs_caddr_t     addr)
  88 {
  89         int             error;
  90
  91         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
  92
  93         /*
  94          * The following commands are valid even when quotaoff.
  95          */
  96         switch (cmd) {
  97         case Q_XQUOTARM:
  98                 /*
  99                  * Truncate quota files. quota must be off.
 100                  */
 101                 if (XFS_IS_QUOTA_ON(mp))
 102                         return XFS_ERROR(EINVAL);
 103                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 104                         return XFS_ERROR(EROFS);
 105                 return (xfs_qm_scall_trunc_qfiles(mp,
 106                                xfs_qm_import_qtype_flags(*(uint *)addr)));
 107
 108         case Q_XGETQSTAT:
 109                 /*
 110                  * Get quota status information.
 111                  */
 112                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
 113
 114         case Q_XQUOTAON:
 115                 /*
 116                  * QUOTAON - enabling quota enforcement.
 117                  * Quota accounting must be turned on at mount time.
 118                  */
 119                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 120                         return XFS_ERROR(EROFS);
 121                 return (xfs_qm_scall_quotaon(mp,
 122                                           xfs_qm_import_flags(*(uint *)addr)));
 123
 124         case Q_XQUOTAOFF:
 125                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 126                         return XFS_ERROR(EROFS);
 127                 break;
 128
 129         case Q_XQUOTASYNC:
 130                 return (xfs_sync_inodes(mp, SYNC_DELWRI, NULL));
 131
 132         default:
 133                 break;
 134         }
 135
 136         if (! XFS_IS_QUOTA_ON(mp))
 137                 return XFS_ERROR(ESRCH);
 138
 139         switch (cmd) {
 140         case Q_XQUOTAOFF:
 141                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 142                         return XFS_ERROR(EROFS);
 143                 error = xfs_qm_scall_quotaoff(mp,
 144                                             xfs_qm_import_flags(*(uint *)addr),
 145                                             B_FALSE);
 146                 break;
 147
 148         case Q_XGETQUOTA:
 149                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 150                                         (fs_disk_quota_t *)addr);
 151                 break;
 152         case Q_XGETGQUOTA:
 153                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 154                                         (fs_disk_quota_t *)addr);
 155                 break;
 156         case Q_XGETPQUOTA:
 157                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 158                                         (fs_disk_quota_t *)addr);
 159                 break;
 160
 161         case Q_XSETQLIM:
 162                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 163                         return XFS_ERROR(EROFS);
 164                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 165                                              (fs_disk_quota_t *)addr);
 166                 break;
 167         case Q_XSETGQLIM:
 168                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 169                         return XFS_ERROR(EROFS);
 170                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 171                                              (fs_disk_quota_t *)addr);
 172                 break;
 173         case Q_XSETPQLIM:
 174                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 175                         return XFS_ERROR(EROFS);
 176                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 177                                              (fs_disk_quota_t *)addr);
 178                 break;
 179
 180         default:
 181                 error = XFS_ERROR(EINVAL);
 182                 break;
 183         }
 184
 185         return (error);
 186 }
 187
 188 /*
 189  * Turn off quota accounting and/or enforcement for all udquots and/or
 190  * gdquots. Called only at unmount time.
 191  *
 192  * This assumes that there are no dquots of this file system cached
 193  * incore, and modifies the ondisk dquot directly. Therefore, for example,
 194  * it is an error to call this twice, without purging the cache.
 195  */
 196 STATIC int
 197 xfs_qm_scall_quotaoff(
 198         xfs_mount_t             *mp,
 199         uint                    flags,
 200         boolean_t               force)
 201 {
 202         uint                    dqtype;
 203         int                     error;
 204         uint                    inactivate_flags;
 205         xfs_qoff_logitem_t      *qoffstart;
 206         int                     nculprits;
 207
 208         if (!force && !capable(CAP_SYS_ADMIN))
 209                 return XFS_ERROR(EPERM);
 210         /*
 211          * No file system can have quotas enabled on disk but not in core.
 212          * Note that quota utilities (like quotaoff) _expect_
 213          * errno == EEXIST here.
 214          */
 215         if ((mp->m_qflags & flags) == 0)
 216                 return XFS_ERROR(EEXIST);
 217         error = 0;
 218
 219         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 220
 221         /*
 222          * We don't want to deal with two quotaoffs messing up each other,
 223          * so we're going to serialize it. quotaoff isn't exactly a performance
 224          * critical thing.
 225          * If quotaoff, then we must be dealing with the root filesystem.
 226          */
 227         ASSERT(mp->m_quotainfo);
 228         if (mp->m_quotainfo)
 229                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 230
 231         ASSERT(mp->m_quotainfo);
 232
 233         /*
 234          * If we're just turning off quota enforcement, change mp and go.
 235          */
 236         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
 237                 mp->m_qflags &= ~(flags);
 238
 239                 spin_lock(&mp->m_sb_lock);
 240                 mp->m_sb.sb_qflags = mp->m_qflags;
 241                 spin_unlock(&mp->m_sb_lock);
 242                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 243
 244                 /* XXX what to do if error ? Revert back to old vals incore ? */
 245                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
 246                 return (error);
 247         }
 248
 249         dqtype = 0;
 250         inactivate_flags = 0;
 251         /*
 252          * If accounting is off, we must turn enforcement off, clear the
 253          * quota 'CHKD' certificate to make it known that we have to
 254          * do a quotacheck the next time this quota is turned on.
 255          */
 256         if (flags & XFS_UQUOTA_ACCT) {
 257                 dqtype |= XFS_QMOPT_UQUOTA;
 258                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
 259                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
 260         }
 261         if (flags & XFS_GQUOTA_ACCT) {
 262                 dqtype |= XFS_QMOPT_GQUOTA;
 263                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 264                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
 265         } else if (flags & XFS_PQUOTA_ACCT) {
 266                 dqtype |= XFS_QMOPT_PQUOTA;
 267                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 268                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
 269         }
 270
 271         /*
 272          * Nothing to do?  Don't complain. This happens when we're just
 273          * turning off quota enforcement.
 274          */
 275         if ((mp->m_qflags & flags) == 0) {
 276                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 277                 return (0);
 278         }
 279
 280         /*
 281          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
 282          * and synchronously.
 283          */
 284         xfs_qm_log_quotaoff(mp, &qoffstart, flags);
 285
 286         /*
 287          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
 288          * to take care of the race between dqget and quotaoff. We don't take
 289          * any special locks to reset these bits. All processes need to check
 290          * these bits *after* taking inode lock(s) to see if the particular
 291          * quota type is in the process of being turned off. If *ACTIVE, it is
 292          * guaranteed that all dquot structures and all quotainode ptrs will all
 293          * stay valid as long as that inode is kept locked.
 294          *
 295          * There is no turning back after this.
 296          */
 297         mp->m_qflags &= ~inactivate_flags;
 298
 299         /*
 300          * Give back all the dquot reference(s) held by inodes.
 301          * Here we go thru every single incore inode in this file system, and
 302          * do a dqrele on the i_udquot/i_gdquot that it may have.
 303          * Essentially, as long as somebody has an inode locked, this guarantees
 304          * that quotas will not be turned off. This is handy because in a
 305          * transaction once we lock the inode(s) and check for quotaon, we can
 306          * depend on the quota inodes (and other things) being valid as long as
 307          * we keep the lock(s).
 308          */
 309         xfs_qm_dqrele_all_inodes(mp, flags);
 310
 311         /*
 312          * Next we make the changes in the quota flag in the mount struct.
 313          * This isn't protected by a particular lock directly, because we
 314          * don't want to take a mrlock everytime we depend on quotas being on.
 315          */
 316         mp->m_qflags &= ~(flags);
 317
 318         /*
 319          * Go through all the dquots of this file system and purge them,
 320          * according to what was turned off. We may not be able to get rid
 321          * of all dquots, because dquots can have temporary references that
 322          * are not attached to inodes. eg. xfs_setattr, xfs_create.
 323          * So, if we couldn't purge all the dquots from the filesystem,
 324          * we can't get rid of the incore data structures.
 325          */
 326         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
 327                 delay(10 * nculprits);
 328
 329         /*
 330          * Transactions that had started before ACTIVE state bit was cleared
 331          * could have logged many dquots, so they'd have higher LSNs than
 332          * the first QUOTAOFF log record does. If we happen to crash when
 333          * the tail of the log has gone past the QUOTAOFF record, but
 334          * before the last dquot modification, those dquots __will__
 335          * recover, and that's not good.
 336          *
 337          * So, we have QUOTAOFF start and end logitems; the start
 338          * logitem won't get overwritten until the end logitem appears...
 339          */
 340         xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
 341
 342         /*
 343          * If quotas is completely disabled, close shop.
 344          */
 345         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
 346             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
 347                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 348                 xfs_qm_destroy_quotainfo(mp);
 349                 return (0);
 350         }
 351
 352         /*
 353          * Release our quotainode references, and vn_purge them,
 354          * if we don't need them anymore.
 355          */
 356         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
 357                 XFS_PURGE_INODE(XFS_QI_UQIP(mp));
 358                 XFS_QI_UQIP(mp) = NULL;
 359         }
 360         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
 361                 XFS_PURGE_INODE(XFS_QI_GQIP(mp));
 362                 XFS_QI_GQIP(mp) = NULL;
 363         }
 364         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 365
 366         return (error);
 367 }
 368
 369 STATIC int
 370 xfs_qm_scall_trunc_qfiles(
 371         xfs_mount_t     *mp,
 372         uint            flags)
 373 {
 374         int             error;
 375         xfs_inode_t     *qip;
 376
 377         if (!capable(CAP_SYS_ADMIN))
 378                 return XFS_ERROR(EPERM);
 379         error = 0;
 380         if (!XFS_SB_VERSION_HASQUOTA(&mp->m_sb) || flags == 0) {
 381                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
 382                 return XFS_ERROR(EINVAL);
 383         }
 384
 385         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
 386                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
 387                 if (! error) {
 388                         (void) xfs_truncate_file(mp, qip);
 389                         VN_RELE(XFS_ITOV(qip));
 390                 }
 391         }
 392
 393         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
 394             mp->m_sb.sb_gquotino != NULLFSINO) {
 395                 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
 396                 if (! error) {
 397                         (void) xfs_truncate_file(mp, qip);
 398                         VN_RELE(XFS_ITOV(qip));
 399                 }
 400         }
 401
 402         return (error);
 403 }
 404
 405
 406 /*
 407  * Switch on (a given) quota enforcement for a filesystem.  This takes
 408  * effect immediately.
 409  * (Switching on quota accounting must be done at mount time.)
 410  */
 411 STATIC int
 412 xfs_qm_scall_quotaon(
 413         xfs_mount_t     *mp,
 414         uint            flags)
 415 {
 416         int             error;
 417         uint            qf;
 418         uint            accflags;
 419         __int64_t       sbflags;
 420
 421         if (!capable(CAP_SYS_ADMIN))
 422                 return XFS_ERROR(EPERM);
 423
 424         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 425         /*
 426          * Switching on quota accounting must be done at mount time.
 427          */
 428         accflags = flags & XFS_ALL_QUOTA_ACCT;
 429         flags &= ~(XFS_ALL_QUOTA_ACCT);
 430
 431         sbflags = 0;
 432
 433         if (flags == 0) {
 434                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
 435                 return XFS_ERROR(EINVAL);
 436         }
 437
 438         /* No fs can turn on quotas with a delayed effect */
 439         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 440
 441         /*
 442          * Can't enforce without accounting. We check the superblock
 443          * qflags here instead of m_qflags because rootfs can have
 444          * quota acct on ondisk without m_qflags' knowing.
 445          */
 446         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 447             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 448             (flags & XFS_UQUOTA_ENFD))
 449             ||
 450             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 451             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 452             (flags & XFS_GQUOTA_ACCT) == 0 &&
 453             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 454             (flags & XFS_OQUOTA_ENFD))) {
 455                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 456                         flags, mp->m_sb.sb_qflags);
 457                 return XFS_ERROR(EINVAL);
 458         }
 459         /*
 460          * If everything's upto-date incore, then don't waste time.
 461          */
 462         if ((mp->m_qflags & flags) == flags)
 463                 return XFS_ERROR(EEXIST);
 464
 465         /*
 466          * Change sb_qflags on disk but not incore mp->qflags
 467          * if this is the root filesystem.
 468          */
 469         spin_lock(&mp->m_sb_lock);
 470         qf = mp->m_sb.sb_qflags;
 471         mp->m_sb.sb_qflags = qf | flags;
 472         spin_unlock(&mp->m_sb_lock);
 473
 474         /*
 475          * There's nothing to change if it's the same.
 476          */
 477         if ((qf & flags) == flags && sbflags == 0)
 478                 return XFS_ERROR(EEXIST);
 479         sbflags |= XFS_SB_QFLAGS;
 480
 481         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 482                 return (error);
 483         /*
 484          * If we aren't trying to switch on quota enforcement, we are done.
 485          */
 486         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 487              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 488              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 489              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 490              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 491              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 492             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 493                 return (0);
 494
 495         if (! XFS_IS_QUOTA_RUNNING(mp))
 496                 return XFS_ERROR(ESRCH);
 497
 498         /*
 499          * Switch on quota enforcement in core.
 500          */
 501         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 502         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 503         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 504
 505         return (0);
 506 }
 507
 508
 509 /*
 510  * Return quota status information, such as uquota-off, enforcements, etc.
 511  */
 512 STATIC int
 513 xfs_qm_scall_getqstat(
 514         xfs_mount_t     *mp,
 515         fs_quota_stat_t *out)
 516 {
 517         xfs_inode_t     *uip, *gip;
 518         boolean_t       tempuqip, tempgqip;
 519
 520         uip = gip = NULL;
 521         tempuqip = tempgqip = B_FALSE;
 522         memset(out, 0, sizeof(fs_quota_stat_t));
 523
 524         out->qs_version = FS_QSTAT_VERSION;
 525         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
 526                 out->qs_uquota.qfs_ino = NULLFSINO;
 527                 out->qs_gquota.qfs_ino = NULLFSINO;
 528                 return (0);
 529         }
 530         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 531                                                         (XFS_ALL_QUOTA_ACCT|
 532                                                          XFS_ALL_QUOTA_ENFD));
 533         out->qs_pad = 0;
 534         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 535         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 536
 537         if (mp->m_quotainfo) {
 538                 uip = mp->m_quotainfo->qi_uquotaip;
 539                 gip = mp->m_quotainfo->qi_gquotaip;
 540         }
 541         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 542                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 543                                         0, 0, &uip, 0) == 0)
 544                         tempuqip = B_TRUE;
 545         }
 546         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 547                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 548                                         0, 0, &gip, 0) == 0)
 549                         tempgqip = B_TRUE;
 550         }
 551         if (uip) {
 552                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 553                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 554                 if (tempuqip)
 555                         VN_RELE(XFS_ITOV(uip));
 556         }
 557         if (gip) {
 558                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 559                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 560                 if (tempgqip)
 561                         VN_RELE(XFS_ITOV(gip));
 562         }
 563         if (mp->m_quotainfo) {
 564                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 565                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 566                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 567                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 568                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 569                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 570         }
 571         return (0);
 572 }
 573
 574 /*
 575  * Adjust quota limits, and start/stop timers accordingly.
 576  */
 577 STATIC int
 578 xfs_qm_scall_setqlim(
 579         xfs_mount_t             *mp,
 580         xfs_dqid_t              id,
 581         uint                    type,
 582         fs_disk_quota_t         *newlim)
 583 {
 584         xfs_disk_dquot_t        *ddq;
 585         xfs_dquot_t             *dqp;
 586         xfs_trans_t             *tp;
 587         int                     error;
 588         xfs_qcnt_t              hard, soft;
 589
 590         if (!capable(CAP_SYS_ADMIN))
 591                 return XFS_ERROR(EPERM);
 592
 593         if ((newlim->d_fieldmask &
 594             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 595                 return (0);
 596
 597         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 598         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 599                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 600                 xfs_trans_cancel(tp, 0);
 601                 return (error);
 602         }
 603
 604         /*
 605          * We don't want to race with a quotaoff so take the quotaoff lock.
 606          * (We don't hold an inode lock, so there's nothing else to stop
 607          * a quotaoff from happening). (XXXThis doesn't currently happen
 608          * because we take the vfslock before calling xfs_qm_sysent).
 609          */
 610         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 611
 612         /*
 613          * Get the dquot (locked), and join it to the transaction.
 614          * Allocate the dquot if this doesn't exist.
 615          */
 616         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 617                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 618                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 619                 ASSERT(error != ENOENT);
 620                 return (error);
 621         }
 622         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 623         xfs_trans_dqjoin(tp, dqp);
 624         ddq = &dqp->q_core;
 625
 626         /*
 627          * Make sure that hardlimits are >= soft limits before changing.
 628          */
 629         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 630                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 631                         be64_to_cpu(ddq->d_blk_hardlimit);
 632         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 633                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 634                         be64_to_cpu(ddq->d_blk_softlimit);
 635         if (hard == 0 || hard >= soft) {
 636                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 637                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 638                 if (id == 0) {
 639                         mp->m_quotainfo->qi_bhardlimit = hard;
 640                         mp->m_quotainfo->qi_bsoftlimit = soft;
 641                 }
 642         } else {
 643                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 644         }
 645         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 646                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 647                         be64_to_cpu(ddq->d_rtb_hardlimit);
 648         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 649                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 650                         be64_to_cpu(ddq->d_rtb_softlimit);
 651         if (hard == 0 || hard >= soft) {
 652                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 653                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 654                 if (id == 0) {
 655                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 656                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 657                 }
 658         } else {
 659                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 660         }
 661
 662         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 663                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 664                         be64_to_cpu(ddq->d_ino_hardlimit);
 665         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 666                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 667                         be64_to_cpu(ddq->d_ino_softlimit);
 668         if (hard == 0 || hard >= soft) {
 669                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 670                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 671                 if (id == 0) {
 672                         mp->m_quotainfo->qi_ihardlimit = hard;
 673                         mp->m_quotainfo->qi_isoftlimit = soft;
 674                 }
 675         } else {
 676                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 677         }
 678
 679         /*
 680          * Update warnings counter(s) if requested
 681          */
 682         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 683                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 684         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 685                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 686         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 687                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 688
 689         if (id == 0) {
 690                 /*
 691                  * Timelimits for the super user set the relative time
 692                  * the other users can be over quota for this file system.
 693                  * If it is zero a default is used.  Ditto for the default
 694                  * soft and hard limit values (already done, above), and
 695                  * for warnings.
 696                  */
 697                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 698                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 699                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 700                 }
 701                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 702                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 703                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 704                 }
 705                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 706                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 707                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 708                 }
 709                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 710                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 711                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 712                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 713                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 714                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 715         } else {
 716                 /*
 717                  * If the user is now over quota, start the timelimit.
 718                  * The user will not be 'warned'.
 719                  * Note that we keep the timers ticking, whether enforcement
 720                  * is on or off. We don't really want to bother with iterating
 721                  * over all ondisk dquots and turning the timers on/off.
 722                  */
 723                 xfs_qm_adjust_dqtimers(mp, ddq);
 724         }
 725         dqp->dq_flags |= XFS_DQ_DIRTY;
 726         xfs_trans_log_dquot(tp, dqp);
 727
 728         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 729         xfs_trans_commit(tp, 0);
 730         xfs_qm_dqprint(dqp);
 731         xfs_qm_dqrele(dqp);
 732         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 733
 734         return (0);
 735 }
 736
 737 STATIC int
 738 xfs_qm_scall_getquota(
 739         xfs_mount_t     *mp,
 740         xfs_dqid_t      id,
 741         uint            type,
 742         fs_disk_quota_t *out)
 743 {
 744         xfs_dquot_t     *dqp;
 745         int             error;
 746
 747         /*
 748          * Try to get the dquot. We don't want it allocated on disk, so
 749          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 750          * exist, we'll get ENOENT back.
 751          */
 752         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 753                 return (error);
 754         }
 755
 756         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 757         /*
 758          * If everything's NULL, this dquot doesn't quite exist as far as
 759          * our utility programs are concerned.
 760          */
 761         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 762                 xfs_qm_dqput(dqp);
 763                 return XFS_ERROR(ENOENT);
 764         }
 765         /* xfs_qm_dqprint(dqp); */
 766         /*
 767          * Convert the disk dquot to the exportable format
 768          */
 769         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 770         xfs_qm_dqput(dqp);
 771         return (error ? XFS_ERROR(EFAULT) : 0);
 772 }
 773
 774
 775 STATIC int
 776 xfs_qm_log_quotaoff_end(
 777         xfs_mount_t             *mp,
 778         xfs_qoff_logitem_t      *startqoff,
 779         uint                    flags)
 780 {
 781         xfs_trans_t             *tp;
 782         int                     error;
 783         xfs_qoff_logitem_t      *qoffi;
 784
 785         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 786
 787         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 788                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 789                 xfs_trans_cancel(tp, 0);
 790                 return (error);
 791         }
 792
 793         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 794                                         flags & XFS_ALL_QUOTA_ACCT);
 795         xfs_trans_log_quotaoff_item(tp, qoffi);
 796
 797         /*
 798          * We have to make sure that the transaction is secure on disk before we
 799          * return and actually stop quota accounting. So, make it synchronous.
 800          * We don't care about quotoff's performance.
 801          */
 802         xfs_trans_set_sync(tp);
 803         error = xfs_trans_commit(tp, 0);
 804         return (error);
 805 }
 806
 807
 808 STATIC int
 809 xfs_qm_log_quotaoff(
 810         xfs_mount_t            *mp,
 811         xfs_qoff_logitem_t     **qoffstartp,
 812         uint                   flags)
 813 {
 814         xfs_trans_t            *tp;
 815         int                     error;
 816         xfs_qoff_logitem_t     *qoffi=NULL;
 817         uint                    oldsbqflag=0;
 818
 819         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 820         if ((error = xfs_trans_reserve(tp, 0,
 821                                       sizeof(xfs_qoff_logitem_t) * 2 +
 822                                       mp->m_sb.sb_sectsize + 128,
 823                                       0,
 824                                       0,
 825                                       XFS_DEFAULT_LOG_COUNT))) {
 826                 goto error0;
 827         }
 828
 829         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 830         xfs_trans_log_quotaoff_item(tp, qoffi);
 831
 832         spin_lock(&mp->m_sb_lock);
 833         oldsbqflag = mp->m_sb.sb_qflags;
 834         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 835         spin_unlock(&mp->m_sb_lock);
 836
 837         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 838
 839         /*
 840          * We have to make sure that the transaction is secure on disk before we
 841          * return and actually stop quota accounting. So, make it synchronous.
 842          * We don't care about quotoff's performance.
 843          */
 844         xfs_trans_set_sync(tp);
 845         error = xfs_trans_commit(tp, 0);
 846
 847 error0:
 848         if (error) {
 849                 xfs_trans_cancel(tp, 0);
 850                 /*
 851                  * No one else is modifying sb_qflags, so this is OK.
 852                  * We still hold the quotaofflock.
 853                  */
 854                 spin_lock(&mp->m_sb_lock);
 855                 mp->m_sb.sb_qflags = oldsbqflag;
 856                 spin_unlock(&mp->m_sb_lock);
 857         }
 858         *qoffstartp = qoffi;
 859         return (error);
 860 }
 861
 862
 863 /*
 864  * Translate an internal style on-disk-dquot to the exportable format.
 865  * The main differences are that the counters/limits are all in Basic
 866  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 867  * to be converted to the native endianness.
 868  */
 869 STATIC void
 870 xfs_qm_export_dquot(
 871         xfs_mount_t             *mp,
 872         xfs_disk_dquot_t        *src,
 873         struct fs_disk_quota    *dst)
 874 {
 875         memset(dst, 0, sizeof(*dst));
 876         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 877         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 878         dst->d_id = be32_to_cpu(src->d_id);
 879         dst->d_blk_hardlimit =
 880                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 881         dst->d_blk_softlimit =
 882                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 883         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 884         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 885         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 886         dst->d_icount = be64_to_cpu(src->d_icount);
 887         dst->d_btimer = be32_to_cpu(src->d_btimer);
 888         dst->d_itimer = be32_to_cpu(src->d_itimer);
 889         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 890         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 891         dst->d_rtb_hardlimit =
 892                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 893         dst->d_rtb_softlimit =
 894                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 895         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 896         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 897         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 898
 899         /*
 900          * Internally, we don't reset all the timers when quota enforcement
 901          * gets turned off. No need to confuse the user level code,
 902          * so return zeroes in that case.
 903          */
 904         if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
 905             (!XFS_IS_OQUOTA_ENFORCED(mp) &&
 906                         (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
 907                 dst->d_btimer = 0;
 908                 dst->d_itimer = 0;
 909                 dst->d_rtbtimer = 0;
 910         }
 911
 912 #ifdef DEBUG
 913         if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == XFS_USER_QUOTA) ||
 914              (XFS_IS_OQUOTA_ENFORCED(mp) &&
 915                         (dst->d_flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)))) &&
 916             dst->d_id != 0) {
 917                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 918                     (dst->d_blk_softlimit > 0)) {
 919                         ASSERT(dst->d_btimer != 0);
 920                 }
 921                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 922                     (dst->d_ino_softlimit > 0)) {
 923                         ASSERT(dst->d_itimer != 0);
 924                 }
 925         }
 926 #endif
 927 }
 928
 929 STATIC uint
 930 xfs_qm_import_qtype_flags(
 931         uint            uflags)
 932 {
 933         uint            oflags = 0;
 934
 935         /*
 936          * Can't be more than one, or none.
 937          */
 938         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 939                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 940             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 941                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 942             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 943                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 944             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 945                 return (0);
 946
 947         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 948         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 949         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 950         return oflags;
 951 }
 952
 953 STATIC uint
 954 xfs_qm_export_qtype_flags(
 955         uint flags)
 956 {
 957         /*
 958          * Can't be more than one, or none.
 959          */
 960         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 961                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 962         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 963                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 964         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 965                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 966         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 967
 968         return (flags & XFS_DQ_USER) ?
 969                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 970                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 971 }
 972
 973 STATIC uint
 974 xfs_qm_import_flags(
 975         uint uflags)
 976 {
 977         uint flags = 0;
 978
 979         if (uflags & XFS_QUOTA_UDQ_ACCT)
 980                 flags |= XFS_UQUOTA_ACCT;
 981         if (uflags & XFS_QUOTA_PDQ_ACCT)
 982                 flags |= XFS_PQUOTA_ACCT;
 983         if (uflags & XFS_QUOTA_GDQ_ACCT)
 984                 flags |= XFS_GQUOTA_ACCT;
 985         if (uflags & XFS_QUOTA_UDQ_ENFD)
 986                 flags |= XFS_UQUOTA_ENFD;
 987         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 988                 flags |= XFS_OQUOTA_ENFD;
 989         return (flags);
 990 }
 991
 992
 993 STATIC uint
 994 xfs_qm_export_flags(
 995         uint flags)
 996 {
 997         uint uflags;
 998
 999         uflags = 0;
1000         if (flags & XFS_UQUOTA_ACCT)
1001                 uflags |= XFS_QUOTA_UDQ_ACCT;
1002         if (flags & XFS_PQUOTA_ACCT)
1003                 uflags |= XFS_QUOTA_PDQ_ACCT;
1004         if (flags & XFS_GQUOTA_ACCT)
1005                 uflags |= XFS_QUOTA_GDQ_ACCT;
1006         if (flags & XFS_UQUOTA_ENFD)
1007                 uflags |= XFS_QUOTA_UDQ_ENFD;
1008         if (flags & (XFS_OQUOTA_ENFD)) {
1009                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1010                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1011         }
1012         return (uflags);
1013 }
1014
1015
1016 /*
1017  * Go thru all the inodes in the file system, releasing their dquots.
1018  * Note that the mount structure gets modified to indicate that quotas are off
1019  * AFTER this, in the case of quotaoff. This also gets called from
1020  * xfs_rootumount.
1021  */
1022 void
1023 xfs_qm_dqrele_all_inodes(
1024         struct xfs_mount *mp,
1025         uint             flags)
1026 {
1027         xfs_inode_t     *ip, *topino;
1028         uint            ireclaims;
1029         bhv_vnode_t     *vp;
1030         boolean_t       vnode_refd;
1031
1032         ASSERT(mp->m_quotainfo);
1033
1034         XFS_MOUNT_ILOCK(mp);
1035 again:
1036         ip = mp->m_inodes;
1037         if (ip == NULL) {
1038                 XFS_MOUNT_IUNLOCK(mp);
1039                 return;
1040         }
1041         do {
1042                 /* Skip markers inserted by xfs_sync */
1043                 if (ip->i_mount == NULL) {
1044                         ip = ip->i_mnext;
1045                         continue;
1046                 }
1047                 /* Root inode, rbmip and rsumip have associated blocks */
1048                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1049                         ASSERT(ip->i_udquot == NULL);
1050                         ASSERT(ip->i_gdquot == NULL);
1051                         ip = ip->i_mnext;
1052                         continue;
1053                 }
1054                 vp = XFS_ITOV_NULL(ip);
1055                 if (!vp) {
1056                         ASSERT(ip->i_udquot == NULL);
1057                         ASSERT(ip->i_gdquot == NULL);
1058                         ip = ip->i_mnext;
1059                         continue;
1060                 }
1061                 vnode_refd = B_FALSE;
1062                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1063                         ireclaims = mp->m_ireclaims;
1064                         topino = mp->m_inodes;
1065                         vp = vn_grab(vp);
1066                         if (!vp)
1067                                 goto again;
1068
1069                         XFS_MOUNT_IUNLOCK(mp);
1070                         /* XXX restart limit ? */
1071                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1072                         vnode_refd = B_TRUE;
1073                 } else {
1074                         ireclaims = mp->m_ireclaims;
1075                         topino = mp->m_inodes;
1076                         XFS_MOUNT_IUNLOCK(mp);
1077                 }
1078
1079                 /*
1080                  * We don't keep the mountlock across the dqrele() call,
1081                  * since it can take a while..
1082                  */
1083                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1084                         xfs_qm_dqrele(ip->i_udquot);
1085                         ip->i_udquot = NULL;
1086                 }
1087                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1088                         xfs_qm_dqrele(ip->i_gdquot);
1089                         ip->i_gdquot = NULL;
1090                 }
1091                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1092                 /*
1093                  * Wait until we've dropped the ilock and mountlock to
1094                  * do the vn_rele. Or be condemned to an eternity in the
1095                  * inactive code in hell.
1096                  */
1097                 if (vnode_refd)
1098                         VN_RELE(vp);
1099                 XFS_MOUNT_ILOCK(mp);
1100                 /*
1101                  * If an inode was inserted or removed, we gotta
1102                  * start over again.
1103                  */
1104                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1105                         /* XXX use a sentinel */
1106                         goto again;
1107                 }
1108                 ip = ip->i_mnext;
1109         } while (ip != mp->m_inodes);
1110
1111         XFS_MOUNT_IUNLOCK(mp);
1112 }
1113
1114 /*------------------------------------------------------------------------*/
1115 #ifdef DEBUG
1116 /*
1117  * This contains all the test functions for XFS disk quotas.
1118  * Currently it does a quota accounting check. ie. it walks through
1119  * all inodes in the file system, calculating the dquot accounting fields,
1120  * and prints out any inconsistencies.
1121  */
1122 xfs_dqhash_t *qmtest_udqtab;
1123 xfs_dqhash_t *qmtest_gdqtab;
1124 int           qmtest_hashmask;
1125 int           qmtest_nfails;
1126 mutex_t       qcheck_lock;
1127
1128 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1129                                  (__psunsigned_t)(id)) & \
1130                                 (qmtest_hashmask - 1))
1131
1132 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1133                                      (qmtest_udqtab + \
1134                                       DQTEST_HASHVAL(mp, id)) : \
1135                                      (qmtest_gdqtab + \
1136                                       DQTEST_HASHVAL(mp, id)))
1137
1138 #define DQTEST_LIST_PRINT(l, NXT, title) \
1139 { \
1140           xfs_dqtest_t  *dqp; int i = 0;\
1141           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1142           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1143                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1144                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1145                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1146                          dqp->d_bcount, dqp->d_icount); } \
1147 }
1148
1149 typedef struct dqtest {
1150         xfs_dqmarker_t  q_lists;
1151         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1152         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1153         xfs_dqid_t      d_id;           /* user id or group id */
1154         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1155         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1156 } xfs_dqtest_t;
1157
1158 STATIC void
1159 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1160 {
1161         xfs_dquot_t *d;
1162         if (((d) = (h)->qh_next))
1163                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1164         (dqp)->HL_NEXT = d;
1165         (dqp)->HL_PREVP = &((h)->qh_next);
1166         (h)->qh_next = (xfs_dquot_t *)dqp;
1167         (h)->qh_version++;
1168         (h)->qh_nelems++;
1169 }
1170 STATIC void
1171 xfs_qm_dqtest_print(
1172         xfs_dqtest_t    *d)
1173 {
1174         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1175         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1176         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1177         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1178                 d->d_bcount, (int)d->d_bcount);
1179         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1180                 d->d_icount, (int)d->d_icount);
1181         cmn_err(CE_DEBUG, "---------------------------");
1182 }
1183
1184 STATIC void
1185 xfs_qm_dqtest_failed(
1186         xfs_dqtest_t    *d,
1187         xfs_dquot_t     *dqp,
1188         char            *reason,
1189         xfs_qcnt_t      a,
1190         xfs_qcnt_t      b,
1191         int             error)
1192 {
1193         qmtest_nfails++;
1194         if (error)
1195                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1196                        d->d_id, error, reason);
1197         else
1198                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1199                        d->d_id, reason, (int)a, (int)b);
1200         xfs_qm_dqtest_print(d);
1201         if (dqp)
1202                 xfs_qm_dqprint(dqp);
1203 }
1204
1205 STATIC int
1206 xfs_dqtest_cmp2(
1207         xfs_dqtest_t    *d,
1208         xfs_dquot_t     *dqp)
1209 {
1210         int err = 0;
1211         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1212                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1213                         be64_to_cpu(dqp->q_core.d_icount),
1214                         d->d_icount, 0);
1215                 err++;
1216         }
1217         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1218                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1219                         be64_to_cpu(dqp->q_core.d_bcount),
1220                         d->d_bcount, 0);
1221                 err++;
1222         }
1223         if (dqp->q_core.d_blk_softlimit &&
1224             be64_to_cpu(dqp->q_core.d_bcount) >=
1225             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1226                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1227                         cmn_err(CE_DEBUG,
1228                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1229                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1230                         err++;
1231                 }
1232         }
1233         if (dqp->q_core.d_ino_softlimit &&
1234             be64_to_cpu(dqp->q_core.d_icount) >=
1235             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1236                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1237                         cmn_err(CE_DEBUG,
1238                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1239                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1240                         err++;
1241                 }
1242         }
1243 #ifdef QUOTADEBUG
1244         if (!err) {
1245                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1246                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1247         }
1248 #endif
1249         return (err);
1250 }
1251
1252 STATIC void
1253 xfs_dqtest_cmp(
1254         xfs_dqtest_t    *d)
1255 {
1256         xfs_dquot_t     *dqp;
1257         int             error;
1258
1259         /* xfs_qm_dqtest_print(d); */
1260         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1261                                  &dqp))) {
1262                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1263                 return;
1264         }
1265         xfs_dqtest_cmp2(d, dqp);
1266         xfs_qm_dqput(dqp);
1267 }
1268
1269 STATIC int
1270 xfs_qm_internalqcheck_dqget(
1271         xfs_mount_t     *mp,
1272         xfs_dqid_t      id,
1273         uint            type,
1274         xfs_dqtest_t    **O_dq)
1275 {
1276         xfs_dqtest_t    *d;
1277         xfs_dqhash_t    *h;
1278
1279         h = DQTEST_HASH(mp, id, type);
1280         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1281              d = (xfs_dqtest_t *) d->HL_NEXT) {
1282                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1283                 if (d->d_id == id && mp == d->q_mount) {
1284                         *O_dq = d;
1285                         return (0);
1286                 }
1287         }
1288         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1289         d->dq_flags = type;
1290         d->d_id = id;
1291         d->q_mount = mp;
1292         d->q_hash = h;
1293         xfs_qm_hashinsert(h, d);
1294         *O_dq = d;
1295         return (0);
1296 }
1297
1298 STATIC void
1299 xfs_qm_internalqcheck_get_dquots(
1300         xfs_mount_t     *mp,
1301         xfs_dqid_t      uid,
1302         xfs_dqid_t      projid,
1303         xfs_dqid_t      gid,
1304         xfs_dqtest_t    **ud,
1305         xfs_dqtest_t    **gd)
1306 {
1307         if (XFS_IS_UQUOTA_ON(mp))
1308                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1309         if (XFS_IS_GQUOTA_ON(mp))
1310                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1311         else if (XFS_IS_PQUOTA_ON(mp))
1312                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1313 }
1314
1315
1316 STATIC void
1317 xfs_qm_internalqcheck_dqadjust(
1318         xfs_inode_t             *ip,
1319         xfs_dqtest_t            *d)
1320 {
1321         d->d_icount++;
1322         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1323 }
1324
1325 STATIC int
1326 xfs_qm_internalqcheck_adjust(
1327         xfs_mount_t     *mp,            /* mount point for filesystem */
1328         xfs_ino_t       ino,            /* inode number to get data for */
1329         void            __user *buffer, /* not used */
1330         int             ubsize,         /* not used */
1331         void            *private_data,  /* not used */
1332         xfs_daddr_t     bno,            /* starting block of inode cluster */
1333         int             *ubused,        /* not used */
1334         void            *dip,           /* not used */
1335         int             *res)           /* bulkstat result code */
1336 {
1337         xfs_inode_t             *ip;
1338         xfs_dqtest_t            *ud, *gd;
1339         uint                    lock_flags;
1340         boolean_t               ipreleased;
1341         int                     error;
1342
1343         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1344
1345         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1346                 *res = BULKSTAT_RV_NOTHING;
1347                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1348                         (unsigned long long) ino,
1349                         (unsigned long long) mp->m_sb.sb_uquotino,
1350                         (unsigned long long) mp->m_sb.sb_gquotino);
1351                 return XFS_ERROR(EINVAL);
1352         }
1353         ipreleased = B_FALSE;
1354  again:
1355         lock_flags = XFS_ILOCK_SHARED;
1356         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1357                 *res = BULKSTAT_RV_NOTHING;
1358                 return (error);
1359         }
1360
1361         if (ip->i_d.di_mode == 0) {
1362                 xfs_iput_new(ip, lock_flags);
1363                 *res = BULKSTAT_RV_NOTHING;
1364                 return XFS_ERROR(ENOENT);
1365         }
1366
1367         /*
1368          * This inode can have blocks after eof which can get released
1369          * when we send it to inactive. Since we don't check the dquot
1370          * until the after all our calculations are done, we must get rid
1371          * of those now.
1372          */
1373         if (! ipreleased) {
1374                 xfs_iput(ip, lock_flags);
1375                 ipreleased = B_TRUE;
1376                 goto again;
1377         }
1378         xfs_qm_internalqcheck_get_dquots(mp,
1379                                         (xfs_dqid_t) ip->i_d.di_uid,
1380                                         (xfs_dqid_t) ip->i_d.di_projid,
1381                                         (xfs_dqid_t) ip->i_d.di_gid,
1382                                         &ud, &gd);
1383         if (XFS_IS_UQUOTA_ON(mp)) {
1384                 ASSERT(ud);
1385                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1386         }
1387         if (XFS_IS_OQUOTA_ON(mp)) {
1388                 ASSERT(gd);
1389                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1390         }
1391         xfs_iput(ip, lock_flags);
1392         *res = BULKSTAT_RV_DIDONE;
1393         return (0);
1394 }
1395
1396
1397 /* PRIVATE, debugging */
1398 int
1399 xfs_qm_internalqcheck(
1400         xfs_mount_t     *mp)
1401 {
1402         xfs_ino_t       lastino;
1403         int             done, count;
1404         int             i;
1405         xfs_dqtest_t    *d, *e;
1406         xfs_dqhash_t    *h1;
1407         int             error;
1408
1409         lastino = 0;
1410         qmtest_hashmask = 32;
1411         count = 5;
1412         done = 0;
1413         qmtest_nfails = 0;
1414
1415         if (! XFS_IS_QUOTA_ON(mp))
1416                 return XFS_ERROR(ESRCH);
1417
1418         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1419         XFS_bflush(mp->m_ddev_targp);
1420         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1421         XFS_bflush(mp->m_ddev_targp);
1422
1423         mutex_lock(&qcheck_lock);
1424         /* There should be absolutely no quota activity while this
1425            is going on. */
1426         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1427                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1428         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1429                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1430         do {
1431                 /*
1432                  * Iterate thru all the inodes in the file system,
1433                  * adjusting the corresponding dquot counters
1434                  */
1435                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1436                                  xfs_qm_internalqcheck_adjust, NULL,
1437                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1438                         break;
1439                 }
1440         } while (! done);
1441         if (error) {
1442                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1443         }
1444         cmn_err(CE_DEBUG, "Checking results against system dquots");
1445         for (i = 0; i < qmtest_hashmask; i++) {
1446                 h1 = &qmtest_udqtab[i];
1447                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1448                         xfs_dqtest_cmp(d);
1449                         e = (xfs_dqtest_t *) d->HL_NEXT;
1450                         kmem_free(d, sizeof(xfs_dqtest_t));
1451                         d = e;
1452                 }
1453                 h1 = &qmtest_gdqtab[i];
1454                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1455                         xfs_dqtest_cmp(d);
1456                         e = (xfs_dqtest_t *) d->HL_NEXT;
1457                         kmem_free(d, sizeof(xfs_dqtest_t));
1458                         d = e;
1459                 }
1460         }
1461
1462         if (qmtest_nfails) {
1463                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1464                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1465         } else {
1466                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1467         }
1468         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1469         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1470         mutex_unlock(&qcheck_lock);
1471         return (qmtest_nfails);
1472 }
1473
1474 #endif /* DEBUG */