git.oblomov.eu Git - linux-2.6/blob - fs/xfs/quota/xfs_qm_syscalls.c

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <linux/capability.h>
  20
  21 #include "xfs.h"
  22 #include "xfs_fs.h"
  23 #include "xfs_bit.h"
  24 #include "xfs_log.h"
  25 #include "xfs_inum.h"
  26 #include "xfs_trans.h"
  27 #include "xfs_sb.h"
  28 #include "xfs_ag.h"
  29 #include "xfs_dir2.h"
  30 #include "xfs_alloc.h"
  31 #include "xfs_dmapi.h"
  32 #include "xfs_quota.h"
  33 #include "xfs_mount.h"
  34 #include "xfs_bmap_btree.h"
  35 #include "xfs_alloc_btree.h"
  36 #include "xfs_ialloc_btree.h"
  37 #include "xfs_dir2_sf.h"
  38 #include "xfs_attr_sf.h"
  39 #include "xfs_dinode.h"
  40 #include "xfs_inode.h"
  41 #include "xfs_ialloc.h"
  42 #include "xfs_itable.h"
  43 #include "xfs_bmap.h"
  44 #include "xfs_btree.h"
  45 #include "xfs_rtalloc.h"
  46 #include "xfs_error.h"
  47 #include "xfs_rw.h"
  48 #include "xfs_acl.h"
  49 #include "xfs_cap.h"
  50 #include "xfs_mac.h"
  51 #include "xfs_attr.h"
  52 #include "xfs_buf_item.h"
  53 #include "xfs_utils.h"
  54 #include "xfs_qm.h"
  55
  56 #ifdef DEBUG
  57 # define qdprintk(s, args...)   cmn_err(CE_DEBUG, s, ## args)
  58 #else
  59 # define qdprintk(s, args...)   do { } while (0)
  60 #endif
  61
  62 STATIC int      xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
  63 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
  64                                         fs_disk_quota_t *);
  65 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
  66 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
  67                                         fs_disk_quota_t *);
  68 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
  69 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
  70 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
  71 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
  72                                         uint);
  73 STATIC uint     xfs_qm_import_flags(uint);
  74 STATIC uint     xfs_qm_export_flags(uint);
  75 STATIC uint     xfs_qm_import_qtype_flags(uint);
  76 STATIC uint     xfs_qm_export_qtype_flags(uint);
  77 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
  78                                         fs_disk_quota_t *);
  79
  80
  81 /*
  82  * The main distribution switch of all XFS quotactl system calls.
  83  */
  84 int
  85 xfs_qm_quotactl(
  86         struct bhv_desc *bdp,
  87         int             cmd,
  88         int             id,
  89         xfs_caddr_t     addr)
  90 {
  91         xfs_mount_t     *mp;
  92         bhv_vfs_t       *vfsp;
  93         int             error;
  94
  95         vfsp = bhvtovfs(bdp);
  96         mp = XFS_VFSTOM(vfsp);
  97
  98         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
  99
 100         /*
 101          * The following commands are valid even when quotaoff.
 102          */
 103         switch (cmd) {
 104         case Q_XQUOTARM:
 105                 /*
 106                  * Truncate quota files. quota must be off.
 107                  */
 108                 if (XFS_IS_QUOTA_ON(mp))
 109                         return XFS_ERROR(EINVAL);
 110                 if (vfsp->vfs_flag & VFS_RDONLY)
 111                         return XFS_ERROR(EROFS);
 112                 return (xfs_qm_scall_trunc_qfiles(mp,
 113                                xfs_qm_import_qtype_flags(*(uint *)addr)));
 114
 115         case Q_XGETQSTAT:
 116                 /*
 117                  * Get quota status information.
 118                  */
 119                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
 120
 121         case Q_XQUOTAON:
 122                 /*
 123                  * QUOTAON - enabling quota enforcement.
 124                  * Quota accounting must be turned on at mount time.
 125                  */
 126                 if (vfsp->vfs_flag & VFS_RDONLY)
 127                         return XFS_ERROR(EROFS);
 128                 return (xfs_qm_scall_quotaon(mp,
 129                                           xfs_qm_import_flags(*(uint *)addr)));
 130
 131         case Q_XQUOTAOFF:
 132                 if (vfsp->vfs_flag & VFS_RDONLY)
 133                         return XFS_ERROR(EROFS);
 134                 break;
 135
 136         case Q_XQUOTASYNC:
 137                 return (xfs_sync_inodes(mp, SYNC_DELWRI, 0, NULL));
 138
 139         default:
 140                 break;
 141         }
 142
 143         if (! XFS_IS_QUOTA_ON(mp))
 144                 return XFS_ERROR(ESRCH);
 145
 146         switch (cmd) {
 147         case Q_XQUOTAOFF:
 148                 if (vfsp->vfs_flag & VFS_RDONLY)
 149                         return XFS_ERROR(EROFS);
 150                 error = xfs_qm_scall_quotaoff(mp,
 151                                             xfs_qm_import_flags(*(uint *)addr),
 152                                             B_FALSE);
 153                 break;
 154
 155         case Q_XGETQUOTA:
 156                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 157                                         (fs_disk_quota_t *)addr);
 158                 break;
 159         case Q_XGETGQUOTA:
 160                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 161                                         (fs_disk_quota_t *)addr);
 162                 break;
 163         case Q_XGETPQUOTA:
 164                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 165                                         (fs_disk_quota_t *)addr);
 166                 break;
 167
 168         case Q_XSETQLIM:
 169                 if (vfsp->vfs_flag & VFS_RDONLY)
 170                         return XFS_ERROR(EROFS);
 171                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 172                                              (fs_disk_quota_t *)addr);
 173                 break;
 174         case Q_XSETGQLIM:
 175                 if (vfsp->vfs_flag & VFS_RDONLY)
 176                         return XFS_ERROR(EROFS);
 177                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 178                                              (fs_disk_quota_t *)addr);
 179                 break;
 180         case Q_XSETPQLIM:
 181                 if (vfsp->vfs_flag & VFS_RDONLY)
 182                         return XFS_ERROR(EROFS);
 183                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 184                                              (fs_disk_quota_t *)addr);
 185                 break;
 186
 187         default:
 188                 error = XFS_ERROR(EINVAL);
 189                 break;
 190         }
 191
 192         return (error);
 193 }
 194
 195 /*
 196  * Turn off quota accounting and/or enforcement for all udquots and/or
 197  * gdquots. Called only at unmount time.
 198  *
 199  * This assumes that there are no dquots of this file system cached
 200  * incore, and modifies the ondisk dquot directly. Therefore, for example,
 201  * it is an error to call this twice, without purging the cache.
 202  */
 203 STATIC int
 204 xfs_qm_scall_quotaoff(
 205         xfs_mount_t             *mp,
 206         uint                    flags,
 207         boolean_t               force)
 208 {
 209         uint                    dqtype;
 210         unsigned long   s;
 211         int                     error;
 212         uint                    inactivate_flags;
 213         xfs_qoff_logitem_t      *qoffstart;
 214         int                     nculprits;
 215
 216         if (!force && !capable(CAP_SYS_ADMIN))
 217                 return XFS_ERROR(EPERM);
 218         /*
 219          * No file system can have quotas enabled on disk but not in core.
 220          * Note that quota utilities (like quotaoff) _expect_
 221          * errno == EEXIST here.
 222          */
 223         if ((mp->m_qflags & flags) == 0)
 224                 return XFS_ERROR(EEXIST);
 225         error = 0;
 226
 227         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 228
 229         /*
 230          * We don't want to deal with two quotaoffs messing up each other,
 231          * so we're going to serialize it. quotaoff isn't exactly a performance
 232          * critical thing.
 233          * If quotaoff, then we must be dealing with the root filesystem.
 234          */
 235         ASSERT(mp->m_quotainfo);
 236         if (mp->m_quotainfo)
 237                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 238
 239         ASSERT(mp->m_quotainfo);
 240
 241         /*
 242          * If we're just turning off quota enforcement, change mp and go.
 243          */
 244         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
 245                 mp->m_qflags &= ~(flags);
 246
 247                 s = XFS_SB_LOCK(mp);
 248                 mp->m_sb.sb_qflags = mp->m_qflags;
 249                 XFS_SB_UNLOCK(mp, s);
 250                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 251
 252                 /* XXX what to do if error ? Revert back to old vals incore ? */
 253                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
 254                 return (error);
 255         }
 256
 257         dqtype = 0;
 258         inactivate_flags = 0;
 259         /*
 260          * If accounting is off, we must turn enforcement off, clear the
 261          * quota 'CHKD' certificate to make it known that we have to
 262          * do a quotacheck the next time this quota is turned on.
 263          */
 264         if (flags & XFS_UQUOTA_ACCT) {
 265                 dqtype |= XFS_QMOPT_UQUOTA;
 266                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
 267                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
 268         }
 269         if (flags & XFS_GQUOTA_ACCT) {
 270                 dqtype |= XFS_QMOPT_GQUOTA;
 271                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 272                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
 273         } else if (flags & XFS_PQUOTA_ACCT) {
 274                 dqtype |= XFS_QMOPT_PQUOTA;
 275                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 276                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
 277         }
 278
 279         /*
 280          * Nothing to do?  Don't complain. This happens when we're just
 281          * turning off quota enforcement.
 282          */
 283         if ((mp->m_qflags & flags) == 0) {
 284                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 285                 return (0);
 286         }
 287
 288         /*
 289          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
 290          * and synchronously.
 291          */
 292         xfs_qm_log_quotaoff(mp, &qoffstart, flags);
 293
 294         /*
 295          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
 296          * to take care of the race between dqget and quotaoff. We don't take
 297          * any special locks to reset these bits. All processes need to check
 298          * these bits *after* taking inode lock(s) to see if the particular
 299          * quota type is in the process of being turned off. If *ACTIVE, it is
 300          * guaranteed that all dquot structures and all quotainode ptrs will all
 301          * stay valid as long as that inode is kept locked.
 302          *
 303          * There is no turning back after this.
 304          */
 305         mp->m_qflags &= ~inactivate_flags;
 306
 307         /*
 308          * Give back all the dquot reference(s) held by inodes.
 309          * Here we go thru every single incore inode in this file system, and
 310          * do a dqrele on the i_udquot/i_gdquot that it may have.
 311          * Essentially, as long as somebody has an inode locked, this guarantees
 312          * that quotas will not be turned off. This is handy because in a
 313          * transaction once we lock the inode(s) and check for quotaon, we can
 314          * depend on the quota inodes (and other things) being valid as long as
 315          * we keep the lock(s).
 316          */
 317         xfs_qm_dqrele_all_inodes(mp, flags);
 318
 319         /*
 320          * Next we make the changes in the quota flag in the mount struct.
 321          * This isn't protected by a particular lock directly, because we
 322          * don't want to take a mrlock everytime we depend on quotas being on.
 323          */
 324         mp->m_qflags &= ~(flags);
 325
 326         /*
 327          * Go through all the dquots of this file system and purge them,
 328          * according to what was turned off. We may not be able to get rid
 329          * of all dquots, because dquots can have temporary references that
 330          * are not attached to inodes. eg. xfs_setattr, xfs_create.
 331          * So, if we couldn't purge all the dquots from the filesystem,
 332          * we can't get rid of the incore data structures.
 333          */
 334         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
 335                 delay(10 * nculprits);
 336
 337         /*
 338          * Transactions that had started before ACTIVE state bit was cleared
 339          * could have logged many dquots, so they'd have higher LSNs than
 340          * the first QUOTAOFF log record does. If we happen to crash when
 341          * the tail of the log has gone past the QUOTAOFF record, but
 342          * before the last dquot modification, those dquots __will__
 343          * recover, and that's not good.
 344          *
 345          * So, we have QUOTAOFF start and end logitems; the start
 346          * logitem won't get overwritten until the end logitem appears...
 347          */
 348         xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
 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                 XFS_PURGE_INODE(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                 XFS_PURGE_INODE(XFS_QI_GQIP(mp));
 370                 XFS_QI_GQIP(mp) = NULL;
 371         }
 372         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 373
 374         return (error);
 375 }
 376
 377 STATIC int
 378 xfs_qm_scall_trunc_qfiles(
 379         xfs_mount_t     *mp,
 380         uint            flags)
 381 {
 382         int             error;
 383         xfs_inode_t     *qip;
 384
 385         if (!capable(CAP_SYS_ADMIN))
 386                 return XFS_ERROR(EPERM);
 387         error = 0;
 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                         (void) xfs_truncate_file(mp, qip);
 397                         VN_RELE(XFS_ITOV(qip));
 398                 }
 399         }
 400
 401         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
 402             mp->m_sb.sb_gquotino != NULLFSINO) {
 403                 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
 404                 if (! error) {
 405                         (void) xfs_truncate_file(mp, qip);
 406                         VN_RELE(XFS_ITOV(qip));
 407                 }
 408         }
 409
 410         return (error);
 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         unsigned long   s;
 426         uint            qf;
 427         uint            accflags;
 428         __int64_t       sbflags;
 429
 430         if (!capable(CAP_SYS_ADMIN))
 431                 return XFS_ERROR(EPERM);
 432
 433         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 434         /*
 435          * Switching on quota accounting must be done at mount time.
 436          */
 437         accflags = flags & XFS_ALL_QUOTA_ACCT;
 438         flags &= ~(XFS_ALL_QUOTA_ACCT);
 439
 440         sbflags = 0;
 441
 442         if (flags == 0) {
 443                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
 444                 return XFS_ERROR(EINVAL);
 445         }
 446
 447         /* No fs can turn on quotas with a delayed effect */
 448         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 449
 450         /*
 451          * Can't enforce without accounting. We check the superblock
 452          * qflags here instead of m_qflags because rootfs can have
 453          * quota acct on ondisk without m_qflags' knowing.
 454          */
 455         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 456             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 457             (flags & XFS_UQUOTA_ENFD))
 458             ||
 459             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 460             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 461             (flags & XFS_OQUOTA_ENFD))
 462             ||
 463             ((flags & XFS_GQUOTA_ACCT) == 0 &&
 464             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 465             (flags & XFS_OQUOTA_ENFD))) {
 466                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 467                         flags, mp->m_sb.sb_qflags);
 468                 return XFS_ERROR(EINVAL);
 469         }
 470         /*
 471          * If everything's upto-date incore, then don't waste time.
 472          */
 473         if ((mp->m_qflags & flags) == flags)
 474                 return XFS_ERROR(EEXIST);
 475
 476         /*
 477          * Change sb_qflags on disk but not incore mp->qflags
 478          * if this is the root filesystem.
 479          */
 480         s = XFS_SB_LOCK(mp);
 481         qf = mp->m_sb.sb_qflags;
 482         mp->m_sb.sb_qflags = qf | flags;
 483         XFS_SB_UNLOCK(mp, s);
 484
 485         /*
 486          * There's nothing to change if it's the same.
 487          */
 488         if ((qf & flags) == flags && sbflags == 0)
 489                 return XFS_ERROR(EEXIST);
 490         sbflags |= XFS_SB_QFLAGS;
 491
 492         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 493                 return (error);
 494         /*
 495          * If we aren't trying to switch on quota enforcement, we are done.
 496          */
 497         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 498              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 499              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 500              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 501              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 502              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 503             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 504                 return (0);
 505
 506         if (! XFS_IS_QUOTA_RUNNING(mp))
 507                 return XFS_ERROR(ESRCH);
 508
 509         /*
 510          * Switch on quota enforcement in core.
 511          */
 512         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 513         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 514         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 515
 516         return (0);
 517 }
 518
 519
 520 /*
 521  * Return quota status information, such as uquota-off, enforcements, etc.
 522  */
 523 STATIC int
 524 xfs_qm_scall_getqstat(
 525         xfs_mount_t     *mp,
 526         fs_quota_stat_t *out)
 527 {
 528         xfs_inode_t     *uip, *gip;
 529         boolean_t       tempuqip, tempgqip;
 530
 531         uip = gip = NULL;
 532         tempuqip = tempgqip = B_FALSE;
 533         memset(out, 0, sizeof(fs_quota_stat_t));
 534
 535         out->qs_version = FS_QSTAT_VERSION;
 536         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
 537                 out->qs_uquota.qfs_ino = NULLFSINO;
 538                 out->qs_gquota.qfs_ino = NULLFSINO;
 539                 return (0);
 540         }
 541         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 542                                                         (XFS_ALL_QUOTA_ACCT|
 543                                                          XFS_ALL_QUOTA_ENFD));
 544         out->qs_pad = 0;
 545         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 546         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 547
 548         if (mp->m_quotainfo) {
 549                 uip = mp->m_quotainfo->qi_uquotaip;
 550                 gip = mp->m_quotainfo->qi_gquotaip;
 551         }
 552         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 553                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 554                                         0, 0, &uip, 0) == 0)
 555                         tempuqip = B_TRUE;
 556         }
 557         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 558                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 559                                         0, 0, &gip, 0) == 0)
 560                         tempgqip = B_TRUE;
 561         }
 562         if (uip) {
 563                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 564                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 565                 if (tempuqip)
 566                         VN_RELE(XFS_ITOV(uip));
 567         }
 568         if (gip) {
 569                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 570                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 571                 if (tempgqip)
 572                         VN_RELE(XFS_ITOV(gip));
 573         }
 574         if (mp->m_quotainfo) {
 575                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 576                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 577                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 578                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 579                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 580                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 581         }
 582         return (0);
 583 }
 584
 585 /*
 586  * Adjust quota limits, and start/stop timers accordingly.
 587  */
 588 STATIC int
 589 xfs_qm_scall_setqlim(
 590         xfs_mount_t             *mp,
 591         xfs_dqid_t              id,
 592         uint                    type,
 593         fs_disk_quota_t         *newlim)
 594 {
 595         xfs_disk_dquot_t        *ddq;
 596         xfs_dquot_t             *dqp;
 597         xfs_trans_t             *tp;
 598         int                     error;
 599         xfs_qcnt_t              hard, soft;
 600
 601         if (!capable(CAP_SYS_ADMIN))
 602                 return XFS_ERROR(EPERM);
 603
 604         if ((newlim->d_fieldmask &
 605             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 606                 return (0);
 607
 608         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 609         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 610                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 611                 xfs_trans_cancel(tp, 0);
 612                 return (error);
 613         }
 614
 615         /*
 616          * We don't want to race with a quotaoff so take the quotaoff lock.
 617          * (We don't hold an inode lock, so there's nothing else to stop
 618          * a quotaoff from happening). (XXXThis doesn't currently happen
 619          * because we take the vfslock before calling xfs_qm_sysent).
 620          */
 621         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 622
 623         /*
 624          * Get the dquot (locked), and join it to the transaction.
 625          * Allocate the dquot if this doesn't exist.
 626          */
 627         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 628                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 629                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 630                 ASSERT(error != ENOENT);
 631                 return (error);
 632         }
 633         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 634         xfs_trans_dqjoin(tp, dqp);
 635         ddq = &dqp->q_core;
 636
 637         /*
 638          * Make sure that hardlimits are >= soft limits before changing.
 639          */
 640         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 641                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 642                         be64_to_cpu(ddq->d_blk_hardlimit);
 643         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 644                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 645                         be64_to_cpu(ddq->d_blk_softlimit);
 646         if (hard == 0 || hard >= soft) {
 647                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 648                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 649                 if (id == 0) {
 650                         mp->m_quotainfo->qi_bhardlimit = hard;
 651                         mp->m_quotainfo->qi_bsoftlimit = soft;
 652                 }
 653         } else {
 654                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 655         }
 656         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 657                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 658                         be64_to_cpu(ddq->d_rtb_hardlimit);
 659         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 660                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 661                         be64_to_cpu(ddq->d_rtb_softlimit);
 662         if (hard == 0 || hard >= soft) {
 663                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 664                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 665                 if (id == 0) {
 666                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 667                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 668                 }
 669         } else {
 670                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 671         }
 672
 673         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 674                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 675                         be64_to_cpu(ddq->d_ino_hardlimit);
 676         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 677                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 678                         be64_to_cpu(ddq->d_ino_softlimit);
 679         if (hard == 0 || hard >= soft) {
 680                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 681                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 682                 if (id == 0) {
 683                         mp->m_quotainfo->qi_ihardlimit = hard;
 684                         mp->m_quotainfo->qi_isoftlimit = soft;
 685                 }
 686         } else {
 687                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 688         }
 689
 690         /*
 691          * Update warnings counter(s) if requested
 692          */
 693         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 694                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 695         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 696                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 697         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 698                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 699
 700         if (id == 0) {
 701                 /*
 702                  * Timelimits for the super user set the relative time
 703                  * the other users can be over quota for this file system.
 704                  * If it is zero a default is used.  Ditto for the default
 705                  * soft and hard limit values (already done, above), and
 706                  * for warnings.
 707                  */
 708                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 709                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 710                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 711                 }
 712                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 713                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 714                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 715                 }
 716                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 717                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 718                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 719                 }
 720                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 721                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 722                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 723                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 724                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 725                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 726         } else {
 727                 /*
 728                  * If the user is now over quota, start the timelimit.
 729                  * The user will not be 'warned'.
 730                  * Note that we keep the timers ticking, whether enforcement
 731                  * is on or off. We don't really want to bother with iterating
 732                  * over all ondisk dquots and turning the timers on/off.
 733                  */
 734                 xfs_qm_adjust_dqtimers(mp, ddq);
 735         }
 736         dqp->dq_flags |= XFS_DQ_DIRTY;
 737         xfs_trans_log_dquot(tp, dqp);
 738
 739         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 740         xfs_trans_commit(tp, 0, NULL);
 741         xfs_qm_dqprint(dqp);
 742         xfs_qm_dqrele(dqp);
 743         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 744
 745         return (0);
 746 }
 747
 748 STATIC int
 749 xfs_qm_scall_getquota(
 750         xfs_mount_t     *mp,
 751         xfs_dqid_t      id,
 752         uint            type,
 753         fs_disk_quota_t *out)
 754 {
 755         xfs_dquot_t     *dqp;
 756         int             error;
 757
 758         /*
 759          * Try to get the dquot. We don't want it allocated on disk, so
 760          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 761          * exist, we'll get ENOENT back.
 762          */
 763         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 764                 return (error);
 765         }
 766
 767         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 768         /*
 769          * If everything's NULL, this dquot doesn't quite exist as far as
 770          * our utility programs are concerned.
 771          */
 772         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 773                 xfs_qm_dqput(dqp);
 774                 return XFS_ERROR(ENOENT);
 775         }
 776         /* xfs_qm_dqprint(dqp); */
 777         /*
 778          * Convert the disk dquot to the exportable format
 779          */
 780         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 781         xfs_qm_dqput(dqp);
 782         return (error ? XFS_ERROR(EFAULT) : 0);
 783 }
 784
 785
 786 STATIC int
 787 xfs_qm_log_quotaoff_end(
 788         xfs_mount_t             *mp,
 789         xfs_qoff_logitem_t      *startqoff,
 790         uint                    flags)
 791 {
 792         xfs_trans_t             *tp;
 793         int                     error;
 794         xfs_qoff_logitem_t      *qoffi;
 795
 796         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 797
 798         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 799                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 800                 xfs_trans_cancel(tp, 0);
 801                 return (error);
 802         }
 803
 804         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 805                                         flags & XFS_ALL_QUOTA_ACCT);
 806         xfs_trans_log_quotaoff_item(tp, qoffi);
 807
 808         /*
 809          * We have to make sure that the transaction is secure on disk before we
 810          * return and actually stop quota accounting. So, make it synchronous.
 811          * We don't care about quotoff's performance.
 812          */
 813         xfs_trans_set_sync(tp);
 814         error = xfs_trans_commit(tp, 0, NULL);
 815         return (error);
 816 }
 817
 818
 819 STATIC int
 820 xfs_qm_log_quotaoff(
 821         xfs_mount_t            *mp,
 822         xfs_qoff_logitem_t     **qoffstartp,
 823         uint                   flags)
 824 {
 825         xfs_trans_t            *tp;
 826         int                     error;
 827         unsigned long   s;
 828         xfs_qoff_logitem_t     *qoffi=NULL;
 829         uint                    oldsbqflag=0;
 830
 831         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 832         if ((error = xfs_trans_reserve(tp, 0,
 833                                       sizeof(xfs_qoff_logitem_t) * 2 +
 834                                       mp->m_sb.sb_sectsize + 128,
 835                                       0,
 836                                       0,
 837                                       XFS_DEFAULT_LOG_COUNT))) {
 838                 goto error0;
 839         }
 840
 841         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 842         xfs_trans_log_quotaoff_item(tp, qoffi);
 843
 844         s = XFS_SB_LOCK(mp);
 845         oldsbqflag = mp->m_sb.sb_qflags;
 846         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 847         XFS_SB_UNLOCK(mp, s);
 848
 849         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 850
 851         /*
 852          * We have to make sure that the transaction is secure on disk before we
 853          * return and actually stop quota accounting. So, make it synchronous.
 854          * We don't care about quotoff's performance.
 855          */
 856         xfs_trans_set_sync(tp);
 857         error = xfs_trans_commit(tp, 0, NULL);
 858
 859 error0:
 860         if (error) {
 861                 xfs_trans_cancel(tp, 0);
 862                 /*
 863                  * No one else is modifying sb_qflags, so this is OK.
 864                  * We still hold the quotaofflock.
 865                  */
 866                 s = XFS_SB_LOCK(mp);
 867                 mp->m_sb.sb_qflags = oldsbqflag;
 868                 XFS_SB_UNLOCK(mp, s);
 869         }
 870         *qoffstartp = qoffi;
 871         return (error);
 872 }
 873
 874
 875 /*
 876  * Translate an internal style on-disk-dquot to the exportable format.
 877  * The main differences are that the counters/limits are all in Basic
 878  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 879  * to be converted to the native endianness.
 880  */
 881 STATIC void
 882 xfs_qm_export_dquot(
 883         xfs_mount_t             *mp,
 884         xfs_disk_dquot_t        *src,
 885         struct fs_disk_quota    *dst)
 886 {
 887         memset(dst, 0, sizeof(*dst));
 888         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 889         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 890         dst->d_id = be32_to_cpu(src->d_id);
 891         dst->d_blk_hardlimit =
 892                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 893         dst->d_blk_softlimit =
 894                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 895         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 896         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 897         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 898         dst->d_icount = be64_to_cpu(src->d_icount);
 899         dst->d_btimer = be32_to_cpu(src->d_btimer);
 900         dst->d_itimer = be32_to_cpu(src->d_itimer);
 901         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 902         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 903         dst->d_rtb_hardlimit =
 904                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 905         dst->d_rtb_softlimit =
 906                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 907         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 908         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 909         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 910
 911         /*
 912          * Internally, we don't reset all the timers when quota enforcement
 913          * gets turned off. No need to confuse the user level code,
 914          * so return zeroes in that case.
 915          */
 916         if (! XFS_IS_QUOTA_ENFORCED(mp)) {
 917                 dst->d_btimer = 0;
 918                 dst->d_itimer = 0;
 919                 dst->d_rtbtimer = 0;
 920         }
 921
 922 #ifdef DEBUG
 923         if (XFS_IS_QUOTA_ENFORCED(mp) && dst->d_id != 0) {
 924                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 925                     (dst->d_blk_softlimit > 0)) {
 926                         ASSERT(dst->d_btimer != 0);
 927                 }
 928                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 929                     (dst->d_ino_softlimit > 0)) {
 930                         ASSERT(dst->d_itimer != 0);
 931                 }
 932         }
 933 #endif
 934 }
 935
 936 STATIC uint
 937 xfs_qm_import_qtype_flags(
 938         uint            uflags)
 939 {
 940         uint            oflags = 0;
 941
 942         /*
 943          * Can't be more than one, or none.
 944          */
 945         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 946                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 947             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 948                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 949             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 950                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 951             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 952                 return (0);
 953
 954         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 955         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 956         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 957         return oflags;
 958 }
 959
 960 STATIC uint
 961 xfs_qm_export_qtype_flags(
 962         uint flags)
 963 {
 964         /*
 965          * Can't be more than one, or none.
 966          */
 967         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 968                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 969         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 970                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 971         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 972                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 973         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 974
 975         return (flags & XFS_DQ_USER) ?
 976                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 977                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 978 }
 979
 980 STATIC uint
 981 xfs_qm_import_flags(
 982         uint uflags)
 983 {
 984         uint flags = 0;
 985
 986         if (uflags & XFS_QUOTA_UDQ_ACCT)
 987                 flags |= XFS_UQUOTA_ACCT;
 988         if (uflags & XFS_QUOTA_PDQ_ACCT)
 989                 flags |= XFS_PQUOTA_ACCT;
 990         if (uflags & XFS_QUOTA_GDQ_ACCT)
 991                 flags |= XFS_GQUOTA_ACCT;
 992         if (uflags & XFS_QUOTA_UDQ_ENFD)
 993                 flags |= XFS_UQUOTA_ENFD;
 994         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 995                 flags |= XFS_OQUOTA_ENFD;
 996         return (flags);
 997 }
 998
 999
1000 STATIC uint
1001 xfs_qm_export_flags(
1002         uint flags)
1003 {
1004         uint uflags;
1005
1006         uflags = 0;
1007         if (flags & XFS_UQUOTA_ACCT)
1008                 uflags |= XFS_QUOTA_UDQ_ACCT;
1009         if (flags & XFS_PQUOTA_ACCT)
1010                 uflags |= XFS_QUOTA_PDQ_ACCT;
1011         if (flags & XFS_GQUOTA_ACCT)
1012                 uflags |= XFS_QUOTA_GDQ_ACCT;
1013         if (flags & XFS_UQUOTA_ENFD)
1014                 uflags |= XFS_QUOTA_UDQ_ENFD;
1015         if (flags & (XFS_OQUOTA_ENFD)) {
1016                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1017                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1018         }
1019         return (uflags);
1020 }
1021
1022
1023 /*
1024  * Go thru all the inodes in the file system, releasing their dquots.
1025  * Note that the mount structure gets modified to indicate that quotas are off
1026  * AFTER this, in the case of quotaoff. This also gets called from
1027  * xfs_rootumount.
1028  */
1029 void
1030 xfs_qm_dqrele_all_inodes(
1031         struct xfs_mount *mp,
1032         uint             flags)
1033 {
1034         xfs_inode_t     *ip, *topino;
1035         uint            ireclaims;
1036         bhv_vnode_t     *vp;
1037         boolean_t       vnode_refd;
1038
1039         ASSERT(mp->m_quotainfo);
1040
1041         XFS_MOUNT_ILOCK(mp);
1042 again:
1043         ip = mp->m_inodes;
1044         if (ip == NULL) {
1045                 XFS_MOUNT_IUNLOCK(mp);
1046                 return;
1047         }
1048         do {
1049                 /* Skip markers inserted by xfs_sync */
1050                 if (ip->i_mount == NULL) {
1051                         ip = ip->i_mnext;
1052                         continue;
1053                 }
1054                 /* Root inode, rbmip and rsumip have associated blocks */
1055                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1056                         ASSERT(ip->i_udquot == NULL);
1057                         ASSERT(ip->i_gdquot == NULL);
1058                         ip = ip->i_mnext;
1059                         continue;
1060                 }
1061                 vp = XFS_ITOV_NULL(ip);
1062                 if (!vp) {
1063                         ASSERT(ip->i_udquot == NULL);
1064                         ASSERT(ip->i_gdquot == NULL);
1065                         ip = ip->i_mnext;
1066                         continue;
1067                 }
1068                 vnode_refd = B_FALSE;
1069                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1070                         ireclaims = mp->m_ireclaims;
1071                         topino = mp->m_inodes;
1072                         vp = vn_grab(vp);
1073                         if (!vp)
1074                                 goto again;
1075
1076                         XFS_MOUNT_IUNLOCK(mp);
1077                         /* XXX restart limit ? */
1078                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1079                         vnode_refd = B_TRUE;
1080                 } else {
1081                         ireclaims = mp->m_ireclaims;
1082                         topino = mp->m_inodes;
1083                         XFS_MOUNT_IUNLOCK(mp);
1084                 }
1085
1086                 /*
1087                  * We don't keep the mountlock across the dqrele() call,
1088                  * since it can take a while..
1089                  */
1090                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1091                         xfs_qm_dqrele(ip->i_udquot);
1092                         ip->i_udquot = NULL;
1093                 }
1094                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1095                         xfs_qm_dqrele(ip->i_gdquot);
1096                         ip->i_gdquot = NULL;
1097                 }
1098                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1099                 /*
1100                  * Wait until we've dropped the ilock and mountlock to
1101                  * do the vn_rele. Or be condemned to an eternity in the
1102                  * inactive code in hell.
1103                  */
1104                 if (vnode_refd)
1105                         VN_RELE(vp);
1106                 XFS_MOUNT_ILOCK(mp);
1107                 /*
1108                  * If an inode was inserted or removed, we gotta
1109                  * start over again.
1110                  */
1111                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1112                         /* XXX use a sentinel */
1113                         goto again;
1114                 }
1115                 ip = ip->i_mnext;
1116         } while (ip != mp->m_inodes);
1117
1118         XFS_MOUNT_IUNLOCK(mp);
1119 }
1120
1121 /*------------------------------------------------------------------------*/
1122 #ifdef DEBUG
1123 /*
1124  * This contains all the test functions for XFS disk quotas.
1125  * Currently it does a quota accounting check. ie. it walks through
1126  * all inodes in the file system, calculating the dquot accounting fields,
1127  * and prints out any inconsistencies.
1128  */
1129 xfs_dqhash_t *qmtest_udqtab;
1130 xfs_dqhash_t *qmtest_gdqtab;
1131 int           qmtest_hashmask;
1132 int           qmtest_nfails;
1133 mutex_t       qcheck_lock;
1134
1135 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1136                                  (__psunsigned_t)(id)) & \
1137                                 (qmtest_hashmask - 1))
1138
1139 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1140                                      (qmtest_udqtab + \
1141                                       DQTEST_HASHVAL(mp, id)) : \
1142                                      (qmtest_gdqtab + \
1143                                       DQTEST_HASHVAL(mp, id)))
1144
1145 #define DQTEST_LIST_PRINT(l, NXT, title) \
1146 { \
1147           xfs_dqtest_t  *dqp; int i = 0;\
1148           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1149           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1150                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1151                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1152                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1153                          dqp->d_bcount, dqp->d_icount); } \
1154 }
1155
1156 typedef struct dqtest {
1157         xfs_dqmarker_t  q_lists;
1158         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1159         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1160         xfs_dqid_t      d_id;           /* user id or group id */
1161         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1162         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1163 } xfs_dqtest_t;
1164
1165 STATIC void
1166 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1167 {
1168         xfs_dquot_t *d;
1169         if (((d) = (h)->qh_next))
1170                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1171         (dqp)->HL_NEXT = d;
1172         (dqp)->HL_PREVP = &((h)->qh_next);
1173         (h)->qh_next = (xfs_dquot_t *)dqp;
1174         (h)->qh_version++;
1175         (h)->qh_nelems++;
1176 }
1177 STATIC void
1178 xfs_qm_dqtest_print(
1179         xfs_dqtest_t    *d)
1180 {
1181         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1182         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1183         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1184         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1185                 d->d_bcount, (int)d->d_bcount);
1186         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1187                 d->d_icount, (int)d->d_icount);
1188         cmn_err(CE_DEBUG, "---------------------------");
1189 }
1190
1191 STATIC void
1192 xfs_qm_dqtest_failed(
1193         xfs_dqtest_t    *d,
1194         xfs_dquot_t     *dqp,
1195         char            *reason,
1196         xfs_qcnt_t      a,
1197         xfs_qcnt_t      b,
1198         int             error)
1199 {
1200         qmtest_nfails++;
1201         if (error)
1202                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1203                        d->d_id, error, reason);
1204         else
1205                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1206                        d->d_id, reason, (int)a, (int)b);
1207         xfs_qm_dqtest_print(d);
1208         if (dqp)
1209                 xfs_qm_dqprint(dqp);
1210 }
1211
1212 STATIC int
1213 xfs_dqtest_cmp2(
1214         xfs_dqtest_t    *d,
1215         xfs_dquot_t     *dqp)
1216 {
1217         int err = 0;
1218         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1219                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1220                         be64_to_cpu(dqp->q_core.d_icount),
1221                         d->d_icount, 0);
1222                 err++;
1223         }
1224         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1225                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1226                         be64_to_cpu(dqp->q_core.d_bcount),
1227                         d->d_bcount, 0);
1228                 err++;
1229         }
1230         if (dqp->q_core.d_blk_softlimit &&
1231             be64_to_cpu(dqp->q_core.d_bcount) >=
1232             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1233                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1234                         cmn_err(CE_DEBUG,
1235                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1236                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1237                         err++;
1238                 }
1239         }
1240         if (dqp->q_core.d_ino_softlimit &&
1241             be64_to_cpu(dqp->q_core.d_icount) >=
1242             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1243                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1244                         cmn_err(CE_DEBUG,
1245                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1246                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1247                         err++;
1248                 }
1249         }
1250 #ifdef QUOTADEBUG
1251         if (!err) {
1252                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1253                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1254         }
1255 #endif
1256         return (err);
1257 }
1258
1259 STATIC void
1260 xfs_dqtest_cmp(
1261         xfs_dqtest_t    *d)
1262 {
1263         xfs_dquot_t     *dqp;
1264         int             error;
1265
1266         /* xfs_qm_dqtest_print(d); */
1267         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1268                                  &dqp))) {
1269                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1270                 return;
1271         }
1272         xfs_dqtest_cmp2(d, dqp);
1273         xfs_qm_dqput(dqp);
1274 }
1275
1276 STATIC int
1277 xfs_qm_internalqcheck_dqget(
1278         xfs_mount_t     *mp,
1279         xfs_dqid_t      id,
1280         uint            type,
1281         xfs_dqtest_t    **O_dq)
1282 {
1283         xfs_dqtest_t    *d;
1284         xfs_dqhash_t    *h;
1285
1286         h = DQTEST_HASH(mp, id, type);
1287         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1288              d = (xfs_dqtest_t *) d->HL_NEXT) {
1289                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1290                 if (d->d_id == id && mp == d->q_mount) {
1291                         *O_dq = d;
1292                         return (0);
1293                 }
1294         }
1295         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1296         d->dq_flags = type;
1297         d->d_id = id;
1298         d->q_mount = mp;
1299         d->q_hash = h;
1300         xfs_qm_hashinsert(h, d);
1301         *O_dq = d;
1302         return (0);
1303 }
1304
1305 STATIC void
1306 xfs_qm_internalqcheck_get_dquots(
1307         xfs_mount_t     *mp,
1308         xfs_dqid_t      uid,
1309         xfs_dqid_t      projid,
1310         xfs_dqid_t      gid,
1311         xfs_dqtest_t    **ud,
1312         xfs_dqtest_t    **gd)
1313 {
1314         if (XFS_IS_UQUOTA_ON(mp))
1315                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1316         if (XFS_IS_GQUOTA_ON(mp))
1317                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1318         else if (XFS_IS_PQUOTA_ON(mp))
1319                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1320 }
1321
1322
1323 STATIC void
1324 xfs_qm_internalqcheck_dqadjust(
1325         xfs_inode_t             *ip,
1326         xfs_dqtest_t            *d)
1327 {
1328         d->d_icount++;
1329         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1330 }
1331
1332 STATIC int
1333 xfs_qm_internalqcheck_adjust(
1334         xfs_mount_t     *mp,            /* mount point for filesystem */
1335         xfs_ino_t       ino,            /* inode number to get data for */
1336         void            __user *buffer, /* not used */
1337         int             ubsize,         /* not used */
1338         void            *private_data,  /* not used */
1339         xfs_daddr_t     bno,            /* starting block of inode cluster */
1340         int             *ubused,        /* not used */
1341         void            *dip,           /* not used */
1342         int             *res)           /* bulkstat result code */
1343 {
1344         xfs_inode_t             *ip;
1345         xfs_dqtest_t            *ud, *gd;
1346         uint                    lock_flags;
1347         boolean_t               ipreleased;
1348         int                     error;
1349
1350         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1351
1352         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1353                 *res = BULKSTAT_RV_NOTHING;
1354                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1355                         (unsigned long long) ino,
1356                         (unsigned long long) mp->m_sb.sb_uquotino,
1357                         (unsigned long long) mp->m_sb.sb_gquotino);
1358                 return XFS_ERROR(EINVAL);
1359         }
1360         ipreleased = B_FALSE;
1361  again:
1362         lock_flags = XFS_ILOCK_SHARED;
1363         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1364                 *res = BULKSTAT_RV_NOTHING;
1365                 return (error);
1366         }
1367
1368         if (ip->i_d.di_mode == 0) {
1369                 xfs_iput_new(ip, lock_flags);
1370                 *res = BULKSTAT_RV_NOTHING;
1371                 return XFS_ERROR(ENOENT);
1372         }
1373
1374         /*
1375          * This inode can have blocks after eof which can get released
1376          * when we send it to inactive. Since we don't check the dquot
1377          * until the after all our calculations are done, we must get rid
1378          * of those now.
1379          */
1380         if (! ipreleased) {
1381                 xfs_iput(ip, lock_flags);
1382                 ipreleased = B_TRUE;
1383                 goto again;
1384         }
1385         xfs_qm_internalqcheck_get_dquots(mp,
1386                                         (xfs_dqid_t) ip->i_d.di_uid,
1387                                         (xfs_dqid_t) ip->i_d.di_projid,
1388                                         (xfs_dqid_t) ip->i_d.di_gid,
1389                                         &ud, &gd);
1390         if (XFS_IS_UQUOTA_ON(mp)) {
1391                 ASSERT(ud);
1392                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1393         }
1394         if (XFS_IS_OQUOTA_ON(mp)) {
1395                 ASSERT(gd);
1396                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1397         }
1398         xfs_iput(ip, lock_flags);
1399         *res = BULKSTAT_RV_DIDONE;
1400         return (0);
1401 }
1402
1403
1404 /* PRIVATE, debugging */
1405 int
1406 xfs_qm_internalqcheck(
1407         xfs_mount_t     *mp)
1408 {
1409         xfs_ino_t       lastino;
1410         int             done, count;
1411         int             i;
1412         xfs_dqtest_t    *d, *e;
1413         xfs_dqhash_t    *h1;
1414         int             error;
1415
1416         lastino = 0;
1417         qmtest_hashmask = 32;
1418         count = 5;
1419         done = 0;
1420         qmtest_nfails = 0;
1421
1422         if (! XFS_IS_QUOTA_ON(mp))
1423                 return XFS_ERROR(ESRCH);
1424
1425         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1426         XFS_bflush(mp->m_ddev_targp);
1427         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1428         XFS_bflush(mp->m_ddev_targp);
1429
1430         mutex_lock(&qcheck_lock);
1431         /* There should be absolutely no quota activity while this
1432            is going on. */
1433         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1434                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1435         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1436                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1437         do {
1438                 /*
1439                  * Iterate thru all the inodes in the file system,
1440                  * adjusting the corresponding dquot counters
1441                  */
1442                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1443                                  xfs_qm_internalqcheck_adjust, NULL,
1444                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1445                         break;
1446                 }
1447         } while (! done);
1448         if (error) {
1449                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1450         }
1451         cmn_err(CE_DEBUG, "Checking results against system dquots");
1452         for (i = 0; i < qmtest_hashmask; i++) {
1453                 h1 = &qmtest_udqtab[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                 h1 = &qmtest_gdqtab[i];
1461                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1462                         xfs_dqtest_cmp(d);
1463                         e = (xfs_dqtest_t *) d->HL_NEXT;
1464                         kmem_free(d, sizeof(xfs_dqtest_t));
1465                         d = e;
1466                 }
1467         }
1468
1469         if (qmtest_nfails) {
1470                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1471                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1472         } else {
1473                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1474         }
1475         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1476         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1477         mutex_unlock(&qcheck_lock);
1478         return (qmtest_nfails);
1479 }
1480
1481 #endif /* DEBUG */