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