fs/xfs/quota/xfs_qm_syscalls.c

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <linux/capability.h>
  20
  21 #include "xfs.h"
  22 #include "xfs_fs.h"
  23 #include "xfs_bit.h"
  24 #include "xfs_log.h"
  25 #include "xfs_inum.h"
  26 #include "xfs_trans.h"
  27 #include "xfs_sb.h"
  28 #include "xfs_ag.h"
  29 #include "xfs_dir2.h"
  30 #include "xfs_alloc.h"
  31 #include "xfs_dmapi.h"
  32 #include "xfs_quota.h"
  33 #include "xfs_mount.h"
  34 #include "xfs_bmap_btree.h"
  35 #include "xfs_alloc_btree.h"
  36 #include "xfs_ialloc_btree.h"
  37 #include "xfs_dir2_sf.h"
  38 #include "xfs_attr_sf.h"
  39 #include "xfs_dinode.h"
  40 #include "xfs_inode.h"
  41 #include "xfs_ialloc.h"
  42 #include "xfs_itable.h"
  43 #include "xfs_bmap.h"
  44 #include "xfs_btree.h"
  45 #include "xfs_rtalloc.h"
  46 #include "xfs_error.h"
  47 #include "xfs_rw.h"
  48 #include "xfs_acl.h"
  49 #include "xfs_attr.h"
  50 #include "xfs_buf_item.h"
  51 #include "xfs_utils.h"
  52 #include "xfs_qm.h"
  53
  54 #ifdef DEBUG
  55 # define qdprintk(s, args...)   cmn_err(CE_DEBUG, s, ## args)
  56 #else
  57 # define qdprintk(s, args...)   do { } while (0)
  58 #endif
  59
  60 STATIC int      xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
  61 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
  62                                         fs_disk_quota_t *);
  63 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
  64 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
  65                                         fs_disk_quota_t *);
  66 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
  67 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
  68 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
  69 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
  70                                         uint);
  71 STATIC uint     xfs_qm_import_flags(uint);
  72 STATIC uint     xfs_qm_export_flags(uint);
  73 STATIC uint     xfs_qm_import_qtype_flags(uint);
  74 STATIC uint     xfs_qm_export_qtype_flags(uint);
  75 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
  76                                         fs_disk_quota_t *);
  77
  78
  79 /*
  80  * The main distribution switch of all XFS quotactl system calls.
  81  */
  82 int
  83 xfs_qm_quotactl(
  84         xfs_mount_t     *mp,
  85         int             cmd,
  86         int             id,
  87         xfs_caddr_t     addr)
  88 {
  89         int             error;
  90
  91         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
  92
  93         /*
  94          * The following commands are valid even when quotaoff.
  95          */
  96         switch (cmd) {
  97         case Q_XQUOTARM:
  98                 /*
  99                  * Truncate quota files. quota must be off.
 100                  */
 101                 if (XFS_IS_QUOTA_ON(mp))
 102                         return XFS_ERROR(EINVAL);
 103                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 104                         return XFS_ERROR(EROFS);
 105                 return (xfs_qm_scall_trunc_qfiles(mp,
 106                                xfs_qm_import_qtype_flags(*(uint *)addr)));
 107
 108         case Q_XGETQSTAT:
 109                 /*
 110                  * Get quota status information.
 111                  */
 112                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
 113
 114         case Q_XQUOTAON:
 115                 /*
 116                  * QUOTAON - enabling quota enforcement.
 117                  * Quota accounting must be turned on at mount time.
 118                  */
 119                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 120                         return XFS_ERROR(EROFS);
 121                 return (xfs_qm_scall_quotaon(mp,
 122                                           xfs_qm_import_flags(*(uint *)addr)));
 123
 124         case Q_XQUOTAOFF:
 125                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 126                         return XFS_ERROR(EROFS);
 127                 break;
 128
 129         case Q_XQUOTASYNC:
 130                 return (xfs_sync_inodes(mp, SYNC_DELWRI, NULL));
 131
 132         default:
 133                 break;
 134         }
 135
 136         if (! XFS_IS_QUOTA_ON(mp))
 137                 return XFS_ERROR(ESRCH);
 138
 139         switch (cmd) {
 140         case Q_XQUOTAOFF:
 141                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 142                         return XFS_ERROR(EROFS);
 143                 error = xfs_qm_scall_quotaoff(mp,
 144                                             xfs_qm_import_flags(*(uint *)addr),
 145                                             B_FALSE);
 146                 break;
 147
 148         case Q_XGETQUOTA:
 149                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 150                                         (fs_disk_quota_t *)addr);
 151                 break;
 152         case Q_XGETGQUOTA:
 153                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 154                                         (fs_disk_quota_t *)addr);
 155                 break;
 156         case Q_XGETPQUOTA:
 157                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 158                                         (fs_disk_quota_t *)addr);
 159                 break;
 160
 161         case Q_XSETQLIM:
 162                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 163                         return XFS_ERROR(EROFS);
 164                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 165                                              (fs_disk_quota_t *)addr);
 166                 break;
 167         case Q_XSETGQLIM:
 168                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 169                         return XFS_ERROR(EROFS);
 170                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 171                                              (fs_disk_quota_t *)addr);
 172                 break;
 173         case Q_XSETPQLIM:
 174                 if (mp->m_flags & XFS_MOUNT_RDONLY)
 175                         return XFS_ERROR(EROFS);
 176                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 177                                              (fs_disk_quota_t *)addr);
 178                 break;
 179
 180         default:
 181                 error = XFS_ERROR(EINVAL);
 182                 break;
 183         }
 184
 185         return (error);
 186 }
 187
 188 /*
 189  * Turn off quota accounting and/or enforcement for all udquots and/or
 190  * gdquots. Called only at unmount time.
 191  *
 192  * This assumes that there are no dquots of this file system cached
 193  * incore, and modifies the ondisk dquot directly. Therefore, for example,
 194  * it is an error to call this twice, without purging the cache.
 195  */
 196 STATIC int
 197 xfs_qm_scall_quotaoff(
 198         xfs_mount_t             *mp,
 199         uint                    flags,
 200         boolean_t               force)
 201 {
 202         uint                    dqtype;
 203         int                     error;
 204         uint                    inactivate_flags;
 205         xfs_qoff_logitem_t      *qoffstart;
 206         int                     nculprits;
 207
 208         if (!force && !capable(CAP_SYS_ADMIN))
 209                 return XFS_ERROR(EPERM);
 210         /*
 211          * No file system can have quotas enabled on disk but not in core.
 212          * Note that quota utilities (like quotaoff) _expect_
 213          * errno == EEXIST here.
 214          */
 215         if ((mp->m_qflags & flags) == 0)
 216                 return XFS_ERROR(EEXIST);
 217         error = 0;
 218
 219         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 220
 221         /*
 222          * We don't want to deal with two quotaoffs messing up each other,
 223          * so we're going to serialize it. quotaoff isn't exactly a performance
 224          * critical thing.
 225          * If quotaoff, then we must be dealing with the root filesystem.
 226          */
 227         ASSERT(mp->m_quotainfo);
 228         if (mp->m_quotainfo)
 229                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 230
 231         ASSERT(mp->m_quotainfo);
 232
 233         /*
 234          * If we're just turning off quota enforcement, change mp and go.
 235          */
 236         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
 237                 mp->m_qflags &= ~(flags);
 238
 239                 spin_lock(&mp->m_sb_lock);
 240                 mp->m_sb.sb_qflags = mp->m_qflags;
 241                 spin_unlock(&mp->m_sb_lock);
 242                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 243
 244                 /* XXX what to do if error ? Revert back to old vals incore ? */
 245                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
 246                 return (error);
 247         }
 248
 249         dqtype = 0;
 250         inactivate_flags = 0;
 251         /*
 252          * If accounting is off, we must turn enforcement off, clear the
 253          * quota 'CHKD' certificate to make it known that we have to
 254          * do a quotacheck the next time this quota is turned on.
 255          */
 256         if (flags & XFS_UQUOTA_ACCT) {
 257                 dqtype |= XFS_QMOPT_UQUOTA;
 258                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
 259                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
 260         }
 261         if (flags & XFS_GQUOTA_ACCT) {
 262                 dqtype |= XFS_QMOPT_GQUOTA;
 263                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 264                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
 265         } else if (flags & XFS_PQUOTA_ACCT) {
 266                 dqtype |= XFS_QMOPT_PQUOTA;
 267                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 268                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
 269         }
 270
 271         /*
 272          * Nothing to do?  Don't complain. This happens when we're just
 273          * turning off quota enforcement.
 274          */
 275         if ((mp->m_qflags & flags) == 0) {
 276                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 277                 return (0);
 278         }
 279
 280         /*
 281          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
 282          * and synchronously. If we fail to write, we should abort the
 283          * operation as it cannot be recovered safely if we crash.
 284          */
 285         error = xfs_qm_log_quotaoff(mp, &qoffstart, flags);
 286         if (error)
 287                 goto out_error;
 288
 289         /*
 290          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
 291          * to take care of the race between dqget and quotaoff. We don't take
 292          * any special locks to reset these bits. All processes need to check
 293          * these bits *after* taking inode lock(s) to see if the particular
 294          * quota type is in the process of being turned off. If *ACTIVE, it is
 295          * guaranteed that all dquot structures and all quotainode ptrs will all
 296          * stay valid as long as that inode is kept locked.
 297          *
 298          * There is no turning back after this.
 299          */
 300         mp->m_qflags &= ~inactivate_flags;
 301
 302         /*
 303          * Give back all the dquot reference(s) held by inodes.
 304          * Here we go thru every single incore inode in this file system, and
 305          * do a dqrele on the i_udquot/i_gdquot that it may have.
 306          * Essentially, as long as somebody has an inode locked, this guarantees
 307          * that quotas will not be turned off. This is handy because in a
 308          * transaction once we lock the inode(s) and check for quotaon, we can
 309          * depend on the quota inodes (and other things) being valid as long as
 310          * we keep the lock(s).
 311          */
 312         xfs_qm_dqrele_all_inodes(mp, flags);
 313
 314         /*
 315          * Next we make the changes in the quota flag in the mount struct.
 316          * This isn't protected by a particular lock directly, because we
 317          * don't want to take a mrlock everytime we depend on quotas being on.
 318          */
 319         mp->m_qflags &= ~(flags);
 320
 321         /*
 322          * Go through all the dquots of this file system and purge them,
 323          * according to what was turned off. We may not be able to get rid
 324          * of all dquots, because dquots can have temporary references that
 325          * are not attached to inodes. eg. xfs_setattr, xfs_create.
 326          * So, if we couldn't purge all the dquots from the filesystem,
 327          * we can't get rid of the incore data structures.
 328          */
 329         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
 330                 delay(10 * nculprits);
 331
 332         /*
 333          * Transactions that had started before ACTIVE state bit was cleared
 334          * could have logged many dquots, so they'd have higher LSNs than
 335          * the first QUOTAOFF log record does. If we happen to crash when
 336          * the tail of the log has gone past the QUOTAOFF record, but
 337          * before the last dquot modification, those dquots __will__
 338          * recover, and that's not good.
 339          *
 340          * So, we have QUOTAOFF start and end logitems; the start
 341          * logitem won't get overwritten until the end logitem appears...
 342          */
 343         error = xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
 344         if (error) {
 345                 /* We're screwed now. Shutdown is the only option. */
 346                 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
 347                 goto out_error;
 348         }
 349
 350         /*
 351          * If quotas is completely disabled, close shop.
 352          */
 353         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
 354             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
 355                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 356                 xfs_qm_destroy_quotainfo(mp);
 357                 return (0);
 358         }
 359
 360         /*
 361          * Release our quotainode references, and vn_purge them,
 362          * if we don't need them anymore.
 363          */
 364         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
 365                 IRELE(XFS_QI_UQIP(mp));
 366                 XFS_QI_UQIP(mp) = NULL;
 367         }
 368         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
 369                 IRELE(XFS_QI_GQIP(mp));
 370                 XFS_QI_GQIP(mp) = NULL;
 371         }
 372 out_error:
 373         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 374
 375         return (error);
 376 }
 377
 378 STATIC int
 379 xfs_qm_scall_trunc_qfiles(
 380         xfs_mount_t     *mp,
 381         uint            flags)
 382 {
 383         int             error = 0, error2 = 0;
 384         xfs_inode_t     *qip;
 385
 386         if (!capable(CAP_SYS_ADMIN))
 387                 return XFS_ERROR(EPERM);
 388         if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0) {
 389                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
 390                 return XFS_ERROR(EINVAL);
 391         }
 392
 393         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
 394                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
 395                 if (!error) {
 396                         error = xfs_truncate_file(mp, qip);
 397                         IRELE(qip);
 398                 }
 399         }
 400
 401         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
 402             mp->m_sb.sb_gquotino != NULLFSINO) {
 403                 error2 = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
 404                 if (!error2) {
 405                         error2 = xfs_truncate_file(mp, qip);
 406                         IRELE(qip);
 407                 }
 408         }
 409
 410         return error ? error : error2;
 411 }
 412
 413
 414 /*
 415  * Switch on (a given) quota enforcement for a filesystem.  This takes
 416  * effect immediately.
 417  * (Switching on quota accounting must be done at mount time.)
 418  */
 419 STATIC int
 420 xfs_qm_scall_quotaon(
 421         xfs_mount_t     *mp,
 422         uint            flags)
 423 {
 424         int             error;
 425         uint            qf;
 426         uint            accflags;
 427         __int64_t       sbflags;
 428
 429         if (!capable(CAP_SYS_ADMIN))
 430                 return XFS_ERROR(EPERM);
 431
 432         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 433         /*
 434          * Switching on quota accounting must be done at mount time.
 435          */
 436         accflags = flags & XFS_ALL_QUOTA_ACCT;
 437         flags &= ~(XFS_ALL_QUOTA_ACCT);
 438
 439         sbflags = 0;
 440
 441         if (flags == 0) {
 442                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
 443                 return XFS_ERROR(EINVAL);
 444         }
 445
 446         /* No fs can turn on quotas with a delayed effect */
 447         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 448
 449         /*
 450          * Can't enforce without accounting. We check the superblock
 451          * qflags here instead of m_qflags because rootfs can have
 452          * quota acct on ondisk without m_qflags' knowing.
 453          */
 454         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 455             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 456             (flags & XFS_UQUOTA_ENFD))
 457             ||
 458             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 459             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 460             (flags & XFS_GQUOTA_ACCT) == 0 &&
 461             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 462             (flags & XFS_OQUOTA_ENFD))) {
 463                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 464                         flags, mp->m_sb.sb_qflags);
 465                 return XFS_ERROR(EINVAL);
 466         }
 467         /*
 468          * If everything's upto-date incore, then don't waste time.
 469          */
 470         if ((mp->m_qflags & flags) == flags)
 471                 return XFS_ERROR(EEXIST);
 472
 473         /*
 474          * Change sb_qflags on disk but not incore mp->qflags
 475          * if this is the root filesystem.
 476          */
 477         spin_lock(&mp->m_sb_lock);
 478         qf = mp->m_sb.sb_qflags;
 479         mp->m_sb.sb_qflags = qf | flags;
 480         spin_unlock(&mp->m_sb_lock);
 481
 482         /*
 483          * There's nothing to change if it's the same.
 484          */
 485         if ((qf & flags) == flags && sbflags == 0)
 486                 return XFS_ERROR(EEXIST);
 487         sbflags |= XFS_SB_QFLAGS;
 488
 489         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 490                 return (error);
 491         /*
 492          * If we aren't trying to switch on quota enforcement, we are done.
 493          */
 494         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 495              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 496              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 497              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 498              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 499              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 500             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 501                 return (0);
 502
 503         if (! XFS_IS_QUOTA_RUNNING(mp))
 504                 return XFS_ERROR(ESRCH);
 505
 506         /*
 507          * Switch on quota enforcement in core.
 508          */
 509         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 510         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 511         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 512
 513         return (0);
 514 }
 515
 516
 517 /*
 518  * Return quota status information, such as uquota-off, enforcements, etc.
 519  */
 520 STATIC int
 521 xfs_qm_scall_getqstat(
 522         xfs_mount_t     *mp,
 523         fs_quota_stat_t *out)
 524 {
 525         xfs_inode_t     *uip, *gip;
 526         boolean_t       tempuqip, tempgqip;
 527
 528         uip = gip = NULL;
 529         tempuqip = tempgqip = B_FALSE;
 530         memset(out, 0, sizeof(fs_quota_stat_t));
 531
 532         out->qs_version = FS_QSTAT_VERSION;
 533         if (!xfs_sb_version_hasquota(&mp->m_sb)) {
 534                 out->qs_uquota.qfs_ino = NULLFSINO;
 535                 out->qs_gquota.qfs_ino = NULLFSINO;
 536                 return (0);
 537         }
 538         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 539                                                         (XFS_ALL_QUOTA_ACCT|
 540                                                          XFS_ALL_QUOTA_ENFD));
 541         out->qs_pad = 0;
 542         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 543         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 544
 545         if (mp->m_quotainfo) {
 546                 uip = mp->m_quotainfo->qi_uquotaip;
 547                 gip = mp->m_quotainfo->qi_gquotaip;
 548         }
 549         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 550                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 551                                         0, 0, &uip, 0) == 0)
 552                         tempuqip = B_TRUE;
 553         }
 554         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 555                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 556                                         0, 0, &gip, 0) == 0)
 557                         tempgqip = B_TRUE;
 558         }
 559         if (uip) {
 560                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 561                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 562                 if (tempuqip)
 563                         IRELE(uip);
 564         }
 565         if (gip) {
 566                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 567                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 568                 if (tempgqip)
 569                         IRELE(gip);
 570         }
 571         if (mp->m_quotainfo) {
 572                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 573                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 574                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 575                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 576                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 577                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 578         }
 579         return (0);
 580 }
 581
 582 /*
 583  * Adjust quota limits, and start/stop timers accordingly.
 584  */
 585 STATIC int
 586 xfs_qm_scall_setqlim(
 587         xfs_mount_t             *mp,
 588         xfs_dqid_t              id,
 589         uint                    type,
 590         fs_disk_quota_t         *newlim)
 591 {
 592         xfs_disk_dquot_t        *ddq;
 593         xfs_dquot_t             *dqp;
 594         xfs_trans_t             *tp;
 595         int                     error;
 596         xfs_qcnt_t              hard, soft;
 597
 598         if (!capable(CAP_SYS_ADMIN))
 599                 return XFS_ERROR(EPERM);
 600
 601         if ((newlim->d_fieldmask &
 602             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 603                 return (0);
 604
 605         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 606         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 607                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 608                 xfs_trans_cancel(tp, 0);
 609                 return (error);
 610         }
 611
 612         /*
 613          * We don't want to race with a quotaoff so take the quotaoff lock.
 614          * (We don't hold an inode lock, so there's nothing else to stop
 615          * a quotaoff from happening). (XXXThis doesn't currently happen
 616          * because we take the vfslock before calling xfs_qm_sysent).
 617          */
 618         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 619
 620         /*
 621          * Get the dquot (locked), and join it to the transaction.
 622          * Allocate the dquot if this doesn't exist.
 623          */
 624         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 625                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 626                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 627                 ASSERT(error != ENOENT);
 628                 return (error);
 629         }
 630         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 631         xfs_trans_dqjoin(tp, dqp);
 632         ddq = &dqp->q_core;
 633
 634         /*
 635          * Make sure that hardlimits are >= soft limits before changing.
 636          */
 637         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 638                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 639                         be64_to_cpu(ddq->d_blk_hardlimit);
 640         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 641                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 642                         be64_to_cpu(ddq->d_blk_softlimit);
 643         if (hard == 0 || hard >= soft) {
 644                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 645                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 646                 if (id == 0) {
 647                         mp->m_quotainfo->qi_bhardlimit = hard;
 648                         mp->m_quotainfo->qi_bsoftlimit = soft;
 649                 }
 650         } else {
 651                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 652         }
 653         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 654                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 655                         be64_to_cpu(ddq->d_rtb_hardlimit);
 656         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 657                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 658                         be64_to_cpu(ddq->d_rtb_softlimit);
 659         if (hard == 0 || hard >= soft) {
 660                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 661                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 662                 if (id == 0) {
 663                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 664                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 665                 }
 666         } else {
 667                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 668         }
 669
 670         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 671                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 672                         be64_to_cpu(ddq->d_ino_hardlimit);
 673         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 674                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 675                         be64_to_cpu(ddq->d_ino_softlimit);
 676         if (hard == 0 || hard >= soft) {
 677                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 678                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 679                 if (id == 0) {
 680                         mp->m_quotainfo->qi_ihardlimit = hard;
 681                         mp->m_quotainfo->qi_isoftlimit = soft;
 682                 }
 683         } else {
 684                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 685         }
 686
 687         /*
 688          * Update warnings counter(s) if requested
 689          */
 690         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 691                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 692         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 693                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 694         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 695                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 696
 697         if (id == 0) {
 698                 /*
 699                  * Timelimits for the super user set the relative time
 700                  * the other users can be over quota for this file system.
 701                  * If it is zero a default is used.  Ditto for the default
 702                  * soft and hard limit values (already done, above), and
 703                  * for warnings.
 704                  */
 705                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 706                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 707                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 708                 }
 709                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 710                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 711                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 712                 }
 713                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 714                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 715                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 716                 }
 717                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 718                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 719                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 720                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 721                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 722                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 723         } else {
 724                 /*
 725                  * If the user is now over quota, start the timelimit.
 726                  * The user will not be 'warned'.
 727                  * Note that we keep the timers ticking, whether enforcement
 728                  * is on or off. We don't really want to bother with iterating
 729                  * over all ondisk dquots and turning the timers on/off.
 730                  */
 731                 xfs_qm_adjust_dqtimers(mp, ddq);
 732         }
 733         dqp->dq_flags |= XFS_DQ_DIRTY;
 734         xfs_trans_log_dquot(tp, dqp);
 735
 736         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 737         error = xfs_trans_commit(tp, 0);
 738         xfs_qm_dqprint(dqp);
 739         xfs_qm_dqrele(dqp);
 740         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 741
 742         return error;
 743 }
 744
 745 STATIC int
 746 xfs_qm_scall_getquota(
 747         xfs_mount_t     *mp,
 748         xfs_dqid_t      id,
 749         uint            type,
 750         fs_disk_quota_t *out)
 751 {
 752         xfs_dquot_t     *dqp;
 753         int             error;
 754
 755         /*
 756          * Try to get the dquot. We don't want it allocated on disk, so
 757          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 758          * exist, we'll get ENOENT back.
 759          */
 760         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 761                 return (error);
 762         }
 763
 764         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 765         /*
 766          * If everything's NULL, this dquot doesn't quite exist as far as
 767          * our utility programs are concerned.
 768          */
 769         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 770                 xfs_qm_dqput(dqp);
 771                 return XFS_ERROR(ENOENT);
 772         }
 773         /* xfs_qm_dqprint(dqp); */
 774         /*
 775          * Convert the disk dquot to the exportable format
 776          */
 777         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 778         xfs_qm_dqput(dqp);
 779         return (error ? XFS_ERROR(EFAULT) : 0);
 780 }
 781
 782
 783 STATIC int
 784 xfs_qm_log_quotaoff_end(
 785         xfs_mount_t             *mp,
 786         xfs_qoff_logitem_t      *startqoff,
 787         uint                    flags)
 788 {
 789         xfs_trans_t             *tp;
 790         int                     error;
 791         xfs_qoff_logitem_t      *qoffi;
 792
 793         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 794
 795         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 796                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 797                 xfs_trans_cancel(tp, 0);
 798                 return (error);
 799         }
 800
 801         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 802                                         flags & XFS_ALL_QUOTA_ACCT);
 803         xfs_trans_log_quotaoff_item(tp, qoffi);
 804
 805         /*
 806          * We have to make sure that the transaction is secure on disk before we
 807          * return and actually stop quota accounting. So, make it synchronous.
 808          * We don't care about quotoff's performance.
 809          */
 810         xfs_trans_set_sync(tp);
 811         error = xfs_trans_commit(tp, 0);
 812         return (error);
 813 }
 814
 815
 816 STATIC int
 817 xfs_qm_log_quotaoff(
 818         xfs_mount_t            *mp,
 819         xfs_qoff_logitem_t     **qoffstartp,
 820         uint                   flags)
 821 {
 822         xfs_trans_t            *tp;
 823         int                     error;
 824         xfs_qoff_logitem_t     *qoffi=NULL;
 825         uint                    oldsbqflag=0;
 826
 827         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 828         if ((error = xfs_trans_reserve(tp, 0,
 829                                       sizeof(xfs_qoff_logitem_t) * 2 +
 830                                       mp->m_sb.sb_sectsize + 128,
 831                                       0,
 832                                       0,
 833                                       XFS_DEFAULT_LOG_COUNT))) {
 834                 goto error0;
 835         }
 836
 837         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 838         xfs_trans_log_quotaoff_item(tp, qoffi);
 839
 840         spin_lock(&mp->m_sb_lock);
 841         oldsbqflag = mp->m_sb.sb_qflags;
 842         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 843         spin_unlock(&mp->m_sb_lock);
 844
 845         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 846
 847         /*
 848          * We have to make sure that the transaction is secure on disk before we
 849          * return and actually stop quota accounting. So, make it synchronous.
 850          * We don't care about quotoff's performance.
 851          */
 852         xfs_trans_set_sync(tp);
 853         error = xfs_trans_commit(tp, 0);
 854
 855 error0:
 856         if (error) {
 857                 xfs_trans_cancel(tp, 0);
 858                 /*
 859                  * No one else is modifying sb_qflags, so this is OK.
 860                  * We still hold the quotaofflock.
 861                  */
 862                 spin_lock(&mp->m_sb_lock);
 863                 mp->m_sb.sb_qflags = oldsbqflag;
 864                 spin_unlock(&mp->m_sb_lock);
 865         }
 866         *qoffstartp = qoffi;
 867         return (error);
 868 }
 869
 870
 871 /*
 872  * Translate an internal style on-disk-dquot to the exportable format.
 873  * The main differences are that the counters/limits are all in Basic
 874  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 875  * to be converted to the native endianness.
 876  */
 877 STATIC void
 878 xfs_qm_export_dquot(
 879         xfs_mount_t             *mp,
 880         xfs_disk_dquot_t        *src,
 881         struct fs_disk_quota    *dst)
 882 {
 883         memset(dst, 0, sizeof(*dst));
 884         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 885         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 886         dst->d_id = be32_to_cpu(src->d_id);
 887         dst->d_blk_hardlimit =
 888                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 889         dst->d_blk_softlimit =
 890                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 891         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 892         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 893         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 894         dst->d_icount = be64_to_cpu(src->d_icount);
 895         dst->d_btimer = be32_to_cpu(src->d_btimer);
 896         dst->d_itimer = be32_to_cpu(src->d_itimer);
 897         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 898         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 899         dst->d_rtb_hardlimit =
 900                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 901         dst->d_rtb_softlimit =
 902                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 903         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 904         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 905         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 906
 907         /*
 908          * Internally, we don't reset all the timers when quota enforcement
 909          * gets turned off. No need to confuse the user level code,
 910          * so return zeroes in that case.
 911          */
 912         if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
 913             (!XFS_IS_OQUOTA_ENFORCED(mp) &&
 914                         (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
 915                 dst->d_btimer = 0;
 916                 dst->d_itimer = 0;
 917                 dst->d_rtbtimer = 0;
 918         }
 919
 920 #ifdef DEBUG
 921         if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == XFS_USER_QUOTA) ||
 922              (XFS_IS_OQUOTA_ENFORCED(mp) &&
 923                         (dst->d_flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)))) &&
 924             dst->d_id != 0) {
 925                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 926                     (dst->d_blk_softlimit > 0)) {
 927                         ASSERT(dst->d_btimer != 0);
 928                 }
 929                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 930                     (dst->d_ino_softlimit > 0)) {
 931                         ASSERT(dst->d_itimer != 0);
 932                 }
 933         }
 934 #endif
 935 }
 936
 937 STATIC uint
 938 xfs_qm_import_qtype_flags(
 939         uint            uflags)
 940 {
 941         uint            oflags = 0;
 942
 943         /*
 944          * Can't be more than one, or none.
 945          */
 946         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 947                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 948             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 949                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 950             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 951                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 952             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 953                 return (0);
 954
 955         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 956         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 957         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 958         return oflags;
 959 }
 960
 961 STATIC uint
 962 xfs_qm_export_qtype_flags(
 963         uint flags)
 964 {
 965         /*
 966          * Can't be more than one, or none.
 967          */
 968         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 969                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 970         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 971                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 972         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 973                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 974         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 975
 976         return (flags & XFS_DQ_USER) ?
 977                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 978                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 979 }
 980
 981 STATIC uint
 982 xfs_qm_import_flags(
 983         uint uflags)
 984 {
 985         uint flags = 0;
 986
 987         if (uflags & XFS_QUOTA_UDQ_ACCT)
 988                 flags |= XFS_UQUOTA_ACCT;
 989         if (uflags & XFS_QUOTA_PDQ_ACCT)
 990                 flags |= XFS_PQUOTA_ACCT;
 991         if (uflags & XFS_QUOTA_GDQ_ACCT)
 992                 flags |= XFS_GQUOTA_ACCT;
 993         if (uflags & XFS_QUOTA_UDQ_ENFD)
 994                 flags |= XFS_UQUOTA_ENFD;
 995         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 996                 flags |= XFS_OQUOTA_ENFD;
 997         return (flags);
 998 }
 999
1000
1001 STATIC uint
1002 xfs_qm_export_flags(
1003         uint flags)
1004 {
1005         uint uflags;
1006
1007         uflags = 0;
1008         if (flags & XFS_UQUOTA_ACCT)
1009                 uflags |= XFS_QUOTA_UDQ_ACCT;
1010         if (flags & XFS_PQUOTA_ACCT)
1011                 uflags |= XFS_QUOTA_PDQ_ACCT;
1012         if (flags & XFS_GQUOTA_ACCT)
1013                 uflags |= XFS_QUOTA_GDQ_ACCT;
1014         if (flags & XFS_UQUOTA_ENFD)
1015                 uflags |= XFS_QUOTA_UDQ_ENFD;
1016         if (flags & (XFS_OQUOTA_ENFD)) {
1017                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1018                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1019         }
1020         return (uflags);
1021 }
1022
1023
1024 /*
1025  * Go thru all the inodes in the file system, releasing their dquots.
1026  * Note that the mount structure gets modified to indicate that quotas are off
1027  * AFTER this, in the case of quotaoff. This also gets called from
1028  * xfs_rootumount.
1029  */
1030 void
1031 xfs_qm_dqrele_all_inodes(
1032         struct xfs_mount *mp,
1033         uint             flags)
1034 {
1035         xfs_inode_t     *ip, *topino;
1036         uint            ireclaims;
1037         bhv_vnode_t     *vp;
1038         boolean_t       vnode_refd;
1039
1040         ASSERT(mp->m_quotainfo);
1041
1042         XFS_MOUNT_ILOCK(mp);
1043 again:
1044         ip = mp->m_inodes;
1045         if (ip == NULL) {
1046                 XFS_MOUNT_IUNLOCK(mp);
1047                 return;
1048         }
1049         do {
1050                 /* Skip markers inserted by xfs_sync */
1051                 if (ip->i_mount == NULL) {
1052                         ip = ip->i_mnext;
1053                         continue;
1054                 }
1055                 /* Root inode, rbmip and rsumip have associated blocks */
1056                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1057                         ASSERT(ip->i_udquot == NULL);
1058                         ASSERT(ip->i_gdquot == NULL);
1059                         ip = ip->i_mnext;
1060                         continue;
1061                 }
1062                 vp = XFS_ITOV_NULL(ip);
1063                 if (!vp) {
1064                         ASSERT(ip->i_udquot == NULL);
1065                         ASSERT(ip->i_gdquot == NULL);
1066                         ip = ip->i_mnext;
1067                         continue;
1068                 }
1069                 vnode_refd = B_FALSE;
1070                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1071                         ireclaims = mp->m_ireclaims;
1072                         topino = mp->m_inodes;
1073                         vp = vn_grab(vp);
1074                         if (!vp)
1075                                 goto again;
1076
1077                         XFS_MOUNT_IUNLOCK(mp);
1078                         /* XXX restart limit ? */
1079                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1080                         vnode_refd = B_TRUE;
1081                 } else {
1082                         ireclaims = mp->m_ireclaims;
1083                         topino = mp->m_inodes;
1084                         XFS_MOUNT_IUNLOCK(mp);
1085                 }
1086
1087                 /*
1088                  * We don't keep the mountlock across the dqrele() call,
1089                  * since it can take a while..
1090                  */
1091                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1092                         xfs_qm_dqrele(ip->i_udquot);
1093                         ip->i_udquot = NULL;
1094                 }
1095                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1096                         xfs_qm_dqrele(ip->i_gdquot);
1097                         ip->i_gdquot = NULL;
1098                 }
1099                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1100                 /*
1101                  * Wait until we've dropped the ilock and mountlock to
1102                  * do the vn_rele. Or be condemned to an eternity in the
1103                  * inactive code in hell.
1104                  */
1105                 if (vnode_refd)
1106                         IRELE(ip);
1107                 XFS_MOUNT_ILOCK(mp);
1108                 /*
1109                  * If an inode was inserted or removed, we gotta
1110                  * start over again.
1111                  */
1112                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1113                         /* XXX use a sentinel */
1114                         goto again;
1115                 }
1116                 ip = ip->i_mnext;
1117         } while (ip != mp->m_inodes);
1118
1119         XFS_MOUNT_IUNLOCK(mp);
1120 }
1121
1122 /*------------------------------------------------------------------------*/
1123 #ifdef DEBUG
1124 /*
1125  * This contains all the test functions for XFS disk quotas.
1126  * Currently it does a quota accounting check. ie. it walks through
1127  * all inodes in the file system, calculating the dquot accounting fields,
1128  * and prints out any inconsistencies.
1129  */
1130 xfs_dqhash_t *qmtest_udqtab;
1131 xfs_dqhash_t *qmtest_gdqtab;
1132 int           qmtest_hashmask;
1133 int           qmtest_nfails;
1134 mutex_t       qcheck_lock;
1135
1136 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1137                                  (__psunsigned_t)(id)) & \
1138                                 (qmtest_hashmask - 1))
1139
1140 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1141                                      (qmtest_udqtab + \
1142                                       DQTEST_HASHVAL(mp, id)) : \
1143                                      (qmtest_gdqtab + \
1144                                       DQTEST_HASHVAL(mp, id)))
1145
1146 #define DQTEST_LIST_PRINT(l, NXT, title) \
1147 { \
1148           xfs_dqtest_t  *dqp; int i = 0;\
1149           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1150           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1151                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1152                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1153                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1154                          dqp->d_bcount, dqp->d_icount); } \
1155 }
1156
1157 typedef struct dqtest {
1158         xfs_dqmarker_t  q_lists;
1159         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1160         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1161         xfs_dqid_t      d_id;           /* user id or group id */
1162         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1163         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1164 } xfs_dqtest_t;
1165
1166 STATIC void
1167 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1168 {
1169         xfs_dquot_t *d;
1170         if (((d) = (h)->qh_next))
1171                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1172         (dqp)->HL_NEXT = d;
1173         (dqp)->HL_PREVP = &((h)->qh_next);
1174         (h)->qh_next = (xfs_dquot_t *)dqp;
1175         (h)->qh_version++;
1176         (h)->qh_nelems++;
1177 }
1178 STATIC void
1179 xfs_qm_dqtest_print(
1180         xfs_dqtest_t    *d)
1181 {
1182         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1183         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1184         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1185         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1186                 d->d_bcount, (int)d->d_bcount);
1187         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1188                 d->d_icount, (int)d->d_icount);
1189         cmn_err(CE_DEBUG, "---------------------------");
1190 }
1191
1192 STATIC void
1193 xfs_qm_dqtest_failed(
1194         xfs_dqtest_t    *d,
1195         xfs_dquot_t     *dqp,
1196         char            *reason,
1197         xfs_qcnt_t      a,
1198         xfs_qcnt_t      b,
1199         int             error)
1200 {
1201         qmtest_nfails++;
1202         if (error)
1203                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1204                        d->d_id, error, reason);
1205         else
1206                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1207                        d->d_id, reason, (int)a, (int)b);
1208         xfs_qm_dqtest_print(d);
1209         if (dqp)
1210                 xfs_qm_dqprint(dqp);
1211 }
1212
1213 STATIC int
1214 xfs_dqtest_cmp2(
1215         xfs_dqtest_t    *d,
1216         xfs_dquot_t     *dqp)
1217 {
1218         int err = 0;
1219         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1220                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1221                         be64_to_cpu(dqp->q_core.d_icount),
1222                         d->d_icount, 0);
1223                 err++;
1224         }
1225         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1226                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1227                         be64_to_cpu(dqp->q_core.d_bcount),
1228                         d->d_bcount, 0);
1229                 err++;
1230         }
1231         if (dqp->q_core.d_blk_softlimit &&
1232             be64_to_cpu(dqp->q_core.d_bcount) >=
1233             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1234                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1235                         cmn_err(CE_DEBUG,
1236                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1237                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1238                         err++;
1239                 }
1240         }
1241         if (dqp->q_core.d_ino_softlimit &&
1242             be64_to_cpu(dqp->q_core.d_icount) >=
1243             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1244                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1245                         cmn_err(CE_DEBUG,
1246                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1247                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1248                         err++;
1249                 }
1250         }
1251 #ifdef QUOTADEBUG
1252         if (!err) {
1253                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1254                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1255         }
1256 #endif
1257         return (err);
1258 }
1259
1260 STATIC void
1261 xfs_dqtest_cmp(
1262         xfs_dqtest_t    *d)
1263 {
1264         xfs_dquot_t     *dqp;
1265         int             error;
1266
1267         /* xfs_qm_dqtest_print(d); */
1268         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1269                                  &dqp))) {
1270                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1271                 return;
1272         }
1273         xfs_dqtest_cmp2(d, dqp);
1274         xfs_qm_dqput(dqp);
1275 }
1276
1277 STATIC int
1278 xfs_qm_internalqcheck_dqget(
1279         xfs_mount_t     *mp,
1280         xfs_dqid_t      id,
1281         uint            type,
1282         xfs_dqtest_t    **O_dq)
1283 {
1284         xfs_dqtest_t    *d;
1285         xfs_dqhash_t    *h;
1286
1287         h = DQTEST_HASH(mp, id, type);
1288         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1289              d = (xfs_dqtest_t *) d->HL_NEXT) {
1290                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1291                 if (d->d_id == id && mp == d->q_mount) {
1292                         *O_dq = d;
1293                         return (0);
1294                 }
1295         }
1296         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1297         d->dq_flags = type;
1298         d->d_id = id;
1299         d->q_mount = mp;
1300         d->q_hash = h;
1301         xfs_qm_hashinsert(h, d);
1302         *O_dq = d;
1303         return (0);
1304 }
1305
1306 STATIC void
1307 xfs_qm_internalqcheck_get_dquots(
1308         xfs_mount_t     *mp,
1309         xfs_dqid_t      uid,
1310         xfs_dqid_t      projid,
1311         xfs_dqid_t      gid,
1312         xfs_dqtest_t    **ud,
1313         xfs_dqtest_t    **gd)
1314 {
1315         if (XFS_IS_UQUOTA_ON(mp))
1316                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1317         if (XFS_IS_GQUOTA_ON(mp))
1318                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1319         else if (XFS_IS_PQUOTA_ON(mp))
1320                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1321 }
1322
1323
1324 STATIC void
1325 xfs_qm_internalqcheck_dqadjust(
1326         xfs_inode_t             *ip,
1327         xfs_dqtest_t            *d)
1328 {
1329         d->d_icount++;
1330         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1331 }
1332
1333 STATIC int
1334 xfs_qm_internalqcheck_adjust(
1335         xfs_mount_t     *mp,            /* mount point for filesystem */
1336         xfs_ino_t       ino,            /* inode number to get data for */
1337         void            __user *buffer, /* not used */
1338         int             ubsize,         /* not used */
1339         void            *private_data,  /* not used */
1340         xfs_daddr_t     bno,            /* starting block of inode cluster */
1341         int             *ubused,        /* not used */
1342         void            *dip,           /* not used */
1343         int             *res)           /* bulkstat result code */
1344 {
1345         xfs_inode_t             *ip;
1346         xfs_dqtest_t            *ud, *gd;
1347         uint                    lock_flags;
1348         boolean_t               ipreleased;
1349         int                     error;
1350
1351         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1352
1353         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1354                 *res = BULKSTAT_RV_NOTHING;
1355                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1356                         (unsigned long long) ino,
1357                         (unsigned long long) mp->m_sb.sb_uquotino,
1358                         (unsigned long long) mp->m_sb.sb_gquotino);
1359                 return XFS_ERROR(EINVAL);
1360         }
1361         ipreleased = B_FALSE;
1362  again:
1363         lock_flags = XFS_ILOCK_SHARED;
1364         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1365                 *res = BULKSTAT_RV_NOTHING;
1366                 return (error);
1367         }
1368
1369         /*
1370          * This inode can have blocks after eof which can get released
1371          * when we send it to inactive. Since we don't check the dquot
1372          * until the after all our calculations are done, we must get rid
1373          * of those now.
1374          */
1375         if (! ipreleased) {
1376                 xfs_iput(ip, lock_flags);
1377                 ipreleased = B_TRUE;
1378                 goto again;
1379         }
1380         xfs_qm_internalqcheck_get_dquots(mp,
1381                                         (xfs_dqid_t) ip->i_d.di_uid,
1382                                         (xfs_dqid_t) ip->i_d.di_projid,
1383                                         (xfs_dqid_t) ip->i_d.di_gid,
1384                                         &ud, &gd);
1385         if (XFS_IS_UQUOTA_ON(mp)) {
1386                 ASSERT(ud);
1387                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1388         }
1389         if (XFS_IS_OQUOTA_ON(mp)) {
1390                 ASSERT(gd);
1391                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1392         }
1393         xfs_iput(ip, lock_flags);
1394         *res = BULKSTAT_RV_DIDONE;
1395         return (0);
1396 }
1397
1398
1399 /* PRIVATE, debugging */
1400 int
1401 xfs_qm_internalqcheck(
1402         xfs_mount_t     *mp)
1403 {
1404         xfs_ino_t       lastino;
1405         int             done, count;
1406         int             i;
1407         xfs_dqtest_t    *d, *e;
1408         xfs_dqhash_t    *h1;
1409         int             error;
1410
1411         lastino = 0;
1412         qmtest_hashmask = 32;
1413         count = 5;
1414         done = 0;
1415         qmtest_nfails = 0;
1416
1417         if (! XFS_IS_QUOTA_ON(mp))
1418                 return XFS_ERROR(ESRCH);
1419
1420         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1421         XFS_bflush(mp->m_ddev_targp);
1422         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1423         XFS_bflush(mp->m_ddev_targp);
1424
1425         mutex_lock(&qcheck_lock);
1426         /* There should be absolutely no quota activity while this
1427            is going on. */
1428         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1429                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1430         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1431                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1432         do {
1433                 /*
1434                  * Iterate thru all the inodes in the file system,
1435                  * adjusting the corresponding dquot counters
1436                  */
1437                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1438                                  xfs_qm_internalqcheck_adjust, NULL,
1439                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1440                         break;
1441                 }
1442         } while (! done);
1443         if (error) {
1444                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1445         }
1446         cmn_err(CE_DEBUG, "Checking results against system dquots");
1447         for (i = 0; i < qmtest_hashmask; i++) {
1448                 h1 = &qmtest_udqtab[i];
1449                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1450                         xfs_dqtest_cmp(d);
1451                         e = (xfs_dqtest_t *) d->HL_NEXT;
1452                         kmem_free(d);
1453                         d = e;
1454                 }
1455                 h1 = &qmtest_gdqtab[i];
1456                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1457                         xfs_dqtest_cmp(d);
1458                         e = (xfs_dqtest_t *) d->HL_NEXT;
1459                         kmem_free(d);
1460                         d = e;
1461                 }
1462         }
1463
1464         if (qmtest_nfails) {
1465                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1466                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1467         } else {
1468                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1469         }
1470         kmem_free(qmtest_udqtab);
1471         kmem_free(qmtest_gdqtab);
1472         mutex_unlock(&qcheck_lock);
1473         return (qmtest_nfails);
1474 }
1475
1476 #endif /* DEBUG */