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         __int64_t       sbflags;
 317
 318         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 319         /*
 320          * Switching on quota accounting must be done at mount time.
 321          */
 322         flags &= ~(XFS_ALL_QUOTA_ACCT);
 323
 324         sbflags = 0;
 325
 326         if (flags == 0) {
 327                 xfs_debug(mp, "%s: zero flags, m_qflags=%x\n",
 328                         __func__, mp->m_qflags);
 329                 return XFS_ERROR(EINVAL);
 330         }
 331
 332         /* No fs can turn on quotas with a delayed effect */
 333         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 334
 335         /*
 336          * Can't enforce without accounting. We check the superblock
 337          * qflags here instead of m_qflags because rootfs can have
 338          * quota acct on ondisk without m_qflags' knowing.
 339          */
 340         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 341             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 342             (flags & XFS_UQUOTA_ENFD))
 343             ||
 344             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 345             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 346             (flags & XFS_GQUOTA_ACCT) == 0 &&
 347             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 348             (flags & XFS_OQUOTA_ENFD))) {
 349                 xfs_debug(mp,
 350                         "%s: Can't enforce without acct, flags=%x sbflags=%x\n",
 351                         __func__, flags, mp->m_sb.sb_qflags);
 352                 return XFS_ERROR(EINVAL);
 353         }
 354         /*
 355          * If everything's up to-date incore, then don't waste time.
 356          */
 357         if ((mp->m_qflags & flags) == flags)
 358                 return XFS_ERROR(EEXIST);
 359
 360         /*
 361          * Change sb_qflags on disk but not incore mp->qflags
 362          * if this is the root filesystem.
 363          */
 364         spin_lock(&mp->m_sb_lock);
 365         qf = mp->m_sb.sb_qflags;
 366         mp->m_sb.sb_qflags = qf | flags;
 367         spin_unlock(&mp->m_sb_lock);
 368
 369         /*
 370          * There's nothing to change if it's the same.
 371          */
 372         if ((qf & flags) == flags && sbflags == 0)
 373                 return XFS_ERROR(EEXIST);
 374         sbflags |= XFS_SB_QFLAGS;
 375
 376         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 377                 return (error);
 378         /*
 379          * If we aren't trying to switch on quota enforcement, we are done.
 380          */
 381         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 382              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 383              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 384              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 385              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 386              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 387             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 388                 return (0);
 389
 390         if (! XFS_IS_QUOTA_RUNNING(mp))
 391                 return XFS_ERROR(ESRCH);
 392
 393         /*
 394          * Switch on quota enforcement in core.
 395          */
 396         mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
 397         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 398         mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
 399
 400         return (0);
 401 }
 402
 403
 404 /*
 405  * Return quota status information, such as uquota-off, enforcements, etc.
 406  */
 407 int
 408 xfs_qm_scall_getqstat(
 409         struct xfs_mount        *mp,
 410         struct fs_quota_stat    *out)
 411 {
 412         struct xfs_quotainfo    *q = mp->m_quotainfo;
 413         struct xfs_inode        *uip, *gip;
 414         boolean_t               tempuqip, tempgqip;
 415
 416         uip = gip = NULL;
 417         tempuqip = tempgqip = B_FALSE;
 418         memset(out, 0, sizeof(fs_quota_stat_t));
 419
 420         out->qs_version = FS_QSTAT_VERSION;
 421         if (!xfs_sb_version_hasquota(&mp->m_sb)) {
 422                 out->qs_uquota.qfs_ino = NULLFSINO;
 423                 out->qs_gquota.qfs_ino = NULLFSINO;
 424                 return (0);
 425         }
 426         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 427                                                         (XFS_ALL_QUOTA_ACCT|
 428                                                          XFS_ALL_QUOTA_ENFD));
 429         out->qs_pad = 0;
 430         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 431         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 432
 433         if (q) {
 434                 uip = q->qi_uquotaip;
 435                 gip = q->qi_gquotaip;
 436         }
 437         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 438                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 439                                         0, 0, &uip) == 0)
 440                         tempuqip = B_TRUE;
 441         }
 442         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 443                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 444                                         0, 0, &gip) == 0)
 445                         tempgqip = B_TRUE;
 446         }
 447         if (uip) {
 448                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 449                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 450                 if (tempuqip)
 451                         IRELE(uip);
 452         }
 453         if (gip) {
 454                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 455                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 456                 if (tempgqip)
 457                         IRELE(gip);
 458         }
 459         if (q) {
 460                 out->qs_incoredqs = q->qi_dquots;
 461                 out->qs_btimelimit = q->qi_btimelimit;
 462                 out->qs_itimelimit = q->qi_itimelimit;
 463                 out->qs_rtbtimelimit = q->qi_rtbtimelimit;
 464                 out->qs_bwarnlimit = q->qi_bwarnlimit;
 465                 out->qs_iwarnlimit = q->qi_iwarnlimit;
 466         }
 467         return 0;
 468 }
 469
 470 #define XFS_DQ_MASK \
 471         (FS_DQ_LIMIT_MASK | FS_DQ_TIMER_MASK | FS_DQ_WARNS_MASK)
 472
 473 /*
 474  * Adjust quota limits, and start/stop timers accordingly.
 475  */
 476 int
 477 xfs_qm_scall_setqlim(
 478         xfs_mount_t             *mp,
 479         xfs_dqid_t              id,
 480         uint                    type,
 481         fs_disk_quota_t         *newlim)
 482 {
 483         struct xfs_quotainfo    *q = mp->m_quotainfo;
 484         xfs_disk_dquot_t        *ddq;
 485         xfs_dquot_t             *dqp;
 486         xfs_trans_t             *tp;
 487         int                     error;
 488         xfs_qcnt_t              hard, soft;
 489
 490         if (newlim->d_fieldmask & ~XFS_DQ_MASK)
 491                 return EINVAL;
 492         if ((newlim->d_fieldmask & XFS_DQ_MASK) == 0)
 493                 return 0;
 494
 495         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 496         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 497                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 498                 xfs_trans_cancel(tp, 0);
 499                 return (error);
 500         }
 501
 502         /*
 503          * We don't want to race with a quotaoff so take the quotaoff lock.
 504          * (We don't hold an inode lock, so there's nothing else to stop
 505          * a quotaoff from happening). (XXXThis doesn't currently happen
 506          * because we take the vfslock before calling xfs_qm_sysent).
 507          */
 508         mutex_lock(&q->qi_quotaofflock);
 509
 510         /*
 511          * Get the dquot (locked), and join it to the transaction.
 512          * Allocate the dquot if this doesn't exist.
 513          */
 514         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 515                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 516                 ASSERT(error != ENOENT);
 517                 goto out_unlock;
 518         }
 519         xfs_trans_dqjoin(tp, dqp);
 520         ddq = &dqp->q_core;
 521
 522         /*
 523          * Make sure that hardlimits are >= soft limits before changing.
 524          */
 525         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 526                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 527                         be64_to_cpu(ddq->d_blk_hardlimit);
 528         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 529                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 530                         be64_to_cpu(ddq->d_blk_softlimit);
 531         if (hard == 0 || hard >= soft) {
 532                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 533                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 534                 if (id == 0) {
 535                         q->qi_bhardlimit = hard;
 536                         q->qi_bsoftlimit = soft;
 537                 }
 538         } else {
 539                 xfs_debug(mp, "blkhard %Ld < blksoft %Ld\n", hard, soft);
 540         }
 541         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 542                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 543                         be64_to_cpu(ddq->d_rtb_hardlimit);
 544         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 545                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 546                         be64_to_cpu(ddq->d_rtb_softlimit);
 547         if (hard == 0 || hard >= soft) {
 548                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 549                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 550                 if (id == 0) {
 551                         q->qi_rtbhardlimit = hard;
 552                         q->qi_rtbsoftlimit = soft;
 553                 }
 554         } else {
 555                 xfs_debug(mp, "rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 556         }
 557
 558         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 559                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 560                         be64_to_cpu(ddq->d_ino_hardlimit);
 561         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 562                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 563                         be64_to_cpu(ddq->d_ino_softlimit);
 564         if (hard == 0 || hard >= soft) {
 565                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 566                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 567                 if (id == 0) {
 568                         q->qi_ihardlimit = hard;
 569                         q->qi_isoftlimit = soft;
 570                 }
 571         } else {
 572                 xfs_debug(mp, "ihard %Ld < isoft %Ld\n", hard, soft);
 573         }
 574
 575         /*
 576          * Update warnings counter(s) if requested
 577          */
 578         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 579                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 580         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 581                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 582         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 583                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 584
 585         if (id == 0) {
 586                 /*
 587                  * Timelimits for the super user set the relative time
 588                  * the other users can be over quota for this file system.
 589                  * If it is zero a default is used.  Ditto for the default
 590                  * soft and hard limit values (already done, above), and
 591                  * for warnings.
 592                  */
 593                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 594                         q->qi_btimelimit = newlim->d_btimer;
 595                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 596                 }
 597                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 598                         q->qi_itimelimit = newlim->d_itimer;
 599                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 600                 }
 601                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 602                         q->qi_rtbtimelimit = newlim->d_rtbtimer;
 603                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 604                 }
 605                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 606                         q->qi_bwarnlimit = newlim->d_bwarns;
 607                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 608                         q->qi_iwarnlimit = newlim->d_iwarns;
 609                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 610                         q->qi_rtbwarnlimit = newlim->d_rtbwarns;
 611         } else {
 612                 /*
 613                  * If the user is now over quota, start the timelimit.
 614                  * The user will not be 'warned'.
 615                  * Note that we keep the timers ticking, whether enforcement
 616                  * is on or off. We don't really want to bother with iterating
 617                  * over all ondisk dquots and turning the timers on/off.
 618                  */
 619                 xfs_qm_adjust_dqtimers(mp, ddq);
 620         }
 621         dqp->dq_flags |= XFS_DQ_DIRTY;
 622         xfs_trans_log_dquot(tp, dqp);
 623
 624         error = xfs_trans_commit(tp, 0);
 625         xfs_qm_dqprint(dqp);
 626         xfs_qm_dqrele(dqp);
 627
 628  out_unlock:
 629         mutex_unlock(&q->qi_quotaofflock);
 630         return error;
 631 }
 632
 633 int
 634 xfs_qm_scall_getquota(
 635         xfs_mount_t     *mp,
 636         xfs_dqid_t      id,
 637         uint            type,
 638         fs_disk_quota_t *out)
 639 {
 640         xfs_dquot_t     *dqp;
 641         int             error;
 642
 643         /*
 644          * Try to get the dquot. We don't want it allocated on disk, so
 645          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 646          * exist, we'll get ENOENT back.
 647          */
 648         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 649                 return (error);
 650         }
 651
 652         /*
 653          * If everything's NULL, this dquot doesn't quite exist as far as
 654          * our utility programs are concerned.
 655          */
 656         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 657                 xfs_qm_dqput(dqp);
 658                 return XFS_ERROR(ENOENT);
 659         }
 660         /* xfs_qm_dqprint(dqp); */
 661         /*
 662          * Convert the disk dquot to the exportable format
 663          */
 664         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 665         xfs_qm_dqput(dqp);
 666         return (error ? XFS_ERROR(EFAULT) : 0);
 667 }
 668
 669
 670 STATIC int
 671 xfs_qm_log_quotaoff_end(
 672         xfs_mount_t             *mp,
 673         xfs_qoff_logitem_t      *startqoff,
 674         uint                    flags)
 675 {
 676         xfs_trans_t             *tp;
 677         int                     error;
 678         xfs_qoff_logitem_t      *qoffi;
 679
 680         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 681
 682         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 683                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 684                 xfs_trans_cancel(tp, 0);
 685                 return (error);
 686         }
 687
 688         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 689                                         flags & XFS_ALL_QUOTA_ACCT);
 690         xfs_trans_log_quotaoff_item(tp, qoffi);
 691
 692         /*
 693          * We have to make sure that the transaction is secure on disk before we
 694          * return and actually stop quota accounting. So, make it synchronous.
 695          * We don't care about quotoff's performance.
 696          */
 697         xfs_trans_set_sync(tp);
 698         error = xfs_trans_commit(tp, 0);
 699         return (error);
 700 }
 701
 702
 703 STATIC int
 704 xfs_qm_log_quotaoff(
 705         xfs_mount_t            *mp,
 706         xfs_qoff_logitem_t     **qoffstartp,
 707         uint                   flags)
 708 {
 709         xfs_trans_t            *tp;
 710         int                     error;
 711         xfs_qoff_logitem_t     *qoffi=NULL;
 712         uint                    oldsbqflag=0;
 713
 714         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 715         if ((error = xfs_trans_reserve(tp, 0,
 716                                       sizeof(xfs_qoff_logitem_t) * 2 +
 717                                       mp->m_sb.sb_sectsize + 128,
 718                                       0,
 719                                       0,
 720                                       XFS_DEFAULT_LOG_COUNT))) {
 721                 goto error0;
 722         }
 723
 724         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 725         xfs_trans_log_quotaoff_item(tp, qoffi);
 726
 727         spin_lock(&mp->m_sb_lock);
 728         oldsbqflag = mp->m_sb.sb_qflags;
 729         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 730         spin_unlock(&mp->m_sb_lock);
 731
 732         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 733
 734         /*
 735          * We have to make sure that the transaction is secure on disk before we
 736          * return and actually stop quota accounting. So, make it synchronous.
 737          * We don't care about quotoff's performance.
 738          */
 739         xfs_trans_set_sync(tp);
 740         error = xfs_trans_commit(tp, 0);
 741
 742 error0:
 743         if (error) {
 744                 xfs_trans_cancel(tp, 0);
 745                 /*
 746                  * No one else is modifying sb_qflags, so this is OK.
 747                  * We still hold the quotaofflock.
 748                  */
 749                 spin_lock(&mp->m_sb_lock);
 750                 mp->m_sb.sb_qflags = oldsbqflag;
 751                 spin_unlock(&mp->m_sb_lock);
 752         }
 753         *qoffstartp = qoffi;
 754         return (error);
 755 }
 756
 757
 758 /*
 759  * Translate an internal style on-disk-dquot to the exportable format.
 760  * The main differences are that the counters/limits are all in Basic
 761  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 762  * to be converted to the native endianness.
 763  */
 764 STATIC void
 765 xfs_qm_export_dquot(
 766         xfs_mount_t             *mp,
 767         xfs_disk_dquot_t        *src,
 768         struct fs_disk_quota    *dst)
 769 {
 770         memset(dst, 0, sizeof(*dst));
 771         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 772         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 773         dst->d_id = be32_to_cpu(src->d_id);
 774         dst->d_blk_hardlimit =
 775                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 776         dst->d_blk_softlimit =
 777                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 778         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 779         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 780         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 781         dst->d_icount = be64_to_cpu(src->d_icount);
 782         dst->d_btimer = be32_to_cpu(src->d_btimer);
 783         dst->d_itimer = be32_to_cpu(src->d_itimer);
 784         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 785         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 786         dst->d_rtb_hardlimit =
 787                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 788         dst->d_rtb_softlimit =
 789                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 790         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 791         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 792         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 793
 794         /*
 795          * Internally, we don't reset all the timers when quota enforcement
 796          * gets turned off. No need to confuse the user level code,
 797          * so return zeroes in that case.
 798          */
 799         if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
 800             (!XFS_IS_OQUOTA_ENFORCED(mp) &&
 801                         (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
 802                 dst->d_btimer = 0;
 803                 dst->d_itimer = 0;
 804                 dst->d_rtbtimer = 0;
 805         }
 806
 807 #ifdef DEBUG
 808         if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == FS_USER_QUOTA) ||
 809              (XFS_IS_OQUOTA_ENFORCED(mp) &&
 810                         (dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) &&
 811             dst->d_id != 0) {
 812                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 813                     (dst->d_blk_softlimit > 0)) {
 814                         ASSERT(dst->d_btimer != 0);
 815                 }
 816                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 817                     (dst->d_ino_softlimit > 0)) {
 818                         ASSERT(dst->d_itimer != 0);
 819                 }
 820         }
 821 #endif
 822 }
 823
 824 STATIC uint
 825 xfs_qm_export_qtype_flags(
 826         uint flags)
 827 {
 828         /*
 829          * Can't be more than one, or none.
 830          */
 831         ASSERT((flags & (FS_PROJ_QUOTA | FS_USER_QUOTA)) !=
 832                 (FS_PROJ_QUOTA | FS_USER_QUOTA));
 833         ASSERT((flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)) !=
 834                 (FS_PROJ_QUOTA | FS_GROUP_QUOTA));
 835         ASSERT((flags & (FS_USER_QUOTA | FS_GROUP_QUOTA)) !=
 836                 (FS_USER_QUOTA | FS_GROUP_QUOTA));
 837         ASSERT((flags & (FS_PROJ_QUOTA|FS_USER_QUOTA|FS_GROUP_QUOTA)) != 0);
 838
 839         return (flags & XFS_DQ_USER) ?
 840                 FS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 841                         FS_PROJ_QUOTA : FS_GROUP_QUOTA;
 842 }
 843
 844 STATIC uint
 845 xfs_qm_export_flags(
 846         uint flags)
 847 {
 848         uint uflags;
 849
 850         uflags = 0;
 851         if (flags & XFS_UQUOTA_ACCT)
 852                 uflags |= FS_QUOTA_UDQ_ACCT;
 853         if (flags & XFS_PQUOTA_ACCT)
 854                 uflags |= FS_QUOTA_PDQ_ACCT;
 855         if (flags & XFS_GQUOTA_ACCT)
 856                 uflags |= FS_QUOTA_GDQ_ACCT;
 857         if (flags & XFS_UQUOTA_ENFD)
 858                 uflags |= FS_QUOTA_UDQ_ENFD;
 859         if (flags & (XFS_OQUOTA_ENFD)) {
 860                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
 861                         FS_QUOTA_GDQ_ENFD : FS_QUOTA_PDQ_ENFD;
 862         }
 863         return (uflags);
 864 }
 865
 866
 867 STATIC int
 868 xfs_dqrele_inode(
 869         struct xfs_inode        *ip,
 870         struct xfs_perag        *pag,
 871         int                     flags)
 872 {
 873         /* skip quota inodes */
 874         if (ip == ip->i_mount->m_quotainfo->qi_uquotaip ||
 875             ip == ip->i_mount->m_quotainfo->qi_gquotaip) {
 876                 ASSERT(ip->i_udquot == NULL);
 877                 ASSERT(ip->i_gdquot == NULL);
 878                 return 0;
 879         }
 880
 881         xfs_ilock(ip, XFS_ILOCK_EXCL);
 882         if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
 883                 xfs_qm_dqrele(ip->i_udquot);
 884                 ip->i_udquot = NULL;
 885         }
 886         if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
 887                 xfs_qm_dqrele(ip->i_gdquot);
 888                 ip->i_gdquot = NULL;
 889         }
 890         xfs_iunlock(ip, XFS_ILOCK_EXCL);
 891         return 0;
 892 }
 893
 894
 895 /*
 896  * Go thru all the inodes in the file system, releasing their dquots.
 897  *
 898  * Note that the mount structure gets modified to indicate that quotas are off
 899  * AFTER this, in the case of quotaoff.
 900  */
 901 void
 902 xfs_qm_dqrele_all_inodes(
 903         struct xfs_mount *mp,
 904         uint             flags)
 905 {
 906         ASSERT(mp->m_quotainfo);
 907         xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags);
 908 }
 909
 910 /*------------------------------------------------------------------------*/
 911 #ifdef DEBUG
 912 /*
 913  * This contains all the test functions for XFS disk quotas.
 914  * Currently it does a quota accounting check. ie. it walks through
 915  * all inodes in the file system, calculating the dquot accounting fields,
 916  * and prints out any inconsistencies.
 917  */
 918 xfs_dqhash_t *qmtest_udqtab;
 919 xfs_dqhash_t *qmtest_gdqtab;
 920 int           qmtest_hashmask;
 921 int           qmtest_nfails;
 922 struct mutex  qcheck_lock;
 923
 924 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
 925                                  (__psunsigned_t)(id)) & \
 926                                 (qmtest_hashmask - 1))
 927
 928 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
 929                                      (qmtest_udqtab + \
 930                                       DQTEST_HASHVAL(mp, id)) : \
 931                                      (qmtest_gdqtab + \
 932                                       DQTEST_HASHVAL(mp, id)))
 933
 934 #define DQTEST_LIST_PRINT(l, NXT, title) \
 935 { \
 936           xfs_dqtest_t  *dqp; int i = 0;\
 937           xfs_debug(NULL, "%s (#%d)", title, (int) (l)->qh_nelems); \
 938           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
 939                dqp = (xfs_dqtest_t *)dqp->NXT) { \
 940                 xfs_debug(dqp->q_mount,         \
 941                         "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
 942                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
 943                          dqp->d_bcount, dqp->d_icount); } \
 944 }
 945
 946 typedef struct dqtest {
 947         uint             dq_flags;      /* various flags (XFS_DQ_*) */
 948         struct list_head q_hashlist;
 949         xfs_dqhash_t    *q_hash;        /* the hashchain header */
 950         xfs_mount_t     *q_mount;       /* filesystem this relates to */
 951         xfs_dqid_t      d_id;           /* user id or group id */
 952         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
 953         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
 954 } xfs_dqtest_t;
 955
 956 STATIC void
 957 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
 958 {
 959         list_add(&dqp->q_hashlist, &h->qh_list);
 960         h->qh_version++;
 961         h->qh_nelems++;
 962 }
 963 STATIC void
 964 xfs_qm_dqtest_print(
 965         struct xfs_mount        *mp,
 966         struct dqtest           *d)
 967 {
 968         xfs_debug(mp, "-----------DQTEST DQUOT----------------");
 969         xfs_debug(mp, "---- dquot ID = %d", d->d_id);
 970         xfs_debug(mp, "---- fs       = 0x%p", d->q_mount);
 971         xfs_debug(mp, "---- bcount   = %Lu (0x%x)",
 972                 d->d_bcount, (int)d->d_bcount);
 973         xfs_debug(mp, "---- icount   = %Lu (0x%x)",
 974                 d->d_icount, (int)d->d_icount);
 975         xfs_debug(mp, "---------------------------");
 976 }
 977
 978 STATIC void
 979 xfs_qm_dqtest_failed(
 980         xfs_dqtest_t    *d,
 981         xfs_dquot_t     *dqp,
 982         char            *reason,
 983         xfs_qcnt_t      a,
 984         xfs_qcnt_t      b,
 985         int             error)
 986 {
 987         qmtest_nfails++;
 988         if (error)
 989                 xfs_debug(dqp->q_mount,
 990                         "quotacheck failed id=%d, err=%d\nreason: %s",
 991                         d->d_id, error, reason);
 992         else
 993                 xfs_debug(dqp->q_mount,
 994                         "quotacheck failed id=%d (%s) [%d != %d]",
 995                         d->d_id, reason, (int)a, (int)b);
 996         xfs_qm_dqtest_print(dqp->q_mount, d);
 997         if (dqp)
 998                 xfs_qm_dqprint(dqp);
 999 }
1000
1001 STATIC int
1002 xfs_dqtest_cmp2(
1003         xfs_dqtest_t    *d,
1004         xfs_dquot_t     *dqp)
1005 {
1006         int err = 0;
1007         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1008                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1009                         be64_to_cpu(dqp->q_core.d_icount),
1010                         d->d_icount, 0);
1011                 err++;
1012         }
1013         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1014                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1015                         be64_to_cpu(dqp->q_core.d_bcount),
1016                         d->d_bcount, 0);
1017                 err++;
1018         }
1019         if (dqp->q_core.d_blk_softlimit &&
1020             be64_to_cpu(dqp->q_core.d_bcount) >=
1021             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1022                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1023                         xfs_debug(dqp->q_mount,
1024                                 "%d [%s] BLK TIMER NOT STARTED",
1025                                 d->d_id, DQFLAGTO_TYPESTR(d));
1026                         err++;
1027                 }
1028         }
1029         if (dqp->q_core.d_ino_softlimit &&
1030             be64_to_cpu(dqp->q_core.d_icount) >=
1031             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1032                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1033                         xfs_debug(dqp->q_mount,
1034                                 "%d [%s] INO TIMER NOT STARTED",
1035                                 d->d_id, DQFLAGTO_TYPESTR(d));
1036                         err++;
1037                 }
1038         }
1039 #ifdef QUOTADEBUG
1040         if (!err) {
1041                 xfs_debug(dqp->q_mount, "%d [%s] qchecked",
1042                         d->d_id, DQFLAGTO_TYPESTR(d));
1043         }
1044 #endif
1045         return (err);
1046 }
1047
1048 STATIC void
1049 xfs_dqtest_cmp(
1050         xfs_dqtest_t    *d)
1051 {
1052         xfs_dquot_t     *dqp;
1053         int             error;
1054
1055         /* xfs_qm_dqtest_print(d); */
1056         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1057                                  &dqp))) {
1058                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1059                 return;
1060         }
1061         xfs_dqtest_cmp2(d, dqp);
1062         xfs_qm_dqput(dqp);
1063 }
1064
1065 STATIC int
1066 xfs_qm_internalqcheck_dqget(
1067         xfs_mount_t     *mp,
1068         xfs_dqid_t      id,
1069         uint            type,
1070         xfs_dqtest_t    **O_dq)
1071 {
1072         xfs_dqtest_t    *d;
1073         xfs_dqhash_t    *h;
1074
1075         h = DQTEST_HASH(mp, id, type);
1076         list_for_each_entry(d, &h->qh_list, q_hashlist) {
1077                 if (d->d_id == id && mp == d->q_mount) {
1078                         *O_dq = d;
1079                         return (0);
1080                 }
1081         }
1082         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1083         d->dq_flags = type;
1084         d->d_id = id;
1085         d->q_mount = mp;
1086         d->q_hash = h;
1087         INIT_LIST_HEAD(&d->q_hashlist);
1088         xfs_qm_hashinsert(h, d);
1089         *O_dq = d;
1090         return (0);
1091 }
1092
1093 STATIC void
1094 xfs_qm_internalqcheck_get_dquots(
1095         xfs_mount_t     *mp,
1096         xfs_dqid_t      uid,
1097         xfs_dqid_t      projid,
1098         xfs_dqid_t      gid,
1099         xfs_dqtest_t    **ud,
1100         xfs_dqtest_t    **gd)
1101 {
1102         if (XFS_IS_UQUOTA_ON(mp))
1103                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1104         if (XFS_IS_GQUOTA_ON(mp))
1105                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1106         else if (XFS_IS_PQUOTA_ON(mp))
1107                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1108 }
1109
1110
1111 STATIC void
1112 xfs_qm_internalqcheck_dqadjust(
1113         xfs_inode_t             *ip,
1114         xfs_dqtest_t            *d)
1115 {
1116         d->d_icount++;
1117         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1118 }
1119
1120 STATIC int
1121 xfs_qm_internalqcheck_adjust(
1122         xfs_mount_t     *mp,            /* mount point for filesystem */
1123         xfs_ino_t       ino,            /* inode number to get data for */
1124         void            __user *buffer, /* not used */
1125         int             ubsize,         /* not used */
1126         int             *ubused,        /* not used */
1127         int             *res)           /* bulkstat result code */
1128 {
1129         xfs_inode_t             *ip;
1130         xfs_dqtest_t            *ud, *gd;
1131         uint                    lock_flags;
1132         boolean_t               ipreleased;
1133         int                     error;
1134
1135         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1136
1137         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1138                 *res = BULKSTAT_RV_NOTHING;
1139                 xfs_debug(mp, "%s: ino=%llu, uqino=%llu, gqino=%llu\n",
1140                         __func__, (unsigned long long) ino,
1141                         (unsigned long long) mp->m_sb.sb_uquotino,
1142                         (unsigned long long) mp->m_sb.sb_gquotino);
1143                 return XFS_ERROR(EINVAL);
1144         }
1145         ipreleased = B_FALSE;
1146  again:
1147         lock_flags = XFS_ILOCK_SHARED;
1148         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip))) {
1149                 *res = BULKSTAT_RV_NOTHING;
1150                 return (error);
1151         }
1152
1153         /*
1154          * This inode can have blocks after eof which can get released
1155          * when we send it to inactive. Since we don't check the dquot
1156          * until the after all our calculations are done, we must get rid
1157          * of those now.
1158          */
1159         if (! ipreleased) {
1160                 xfs_iunlock(ip, lock_flags);
1161                 IRELE(ip);
1162                 ipreleased = B_TRUE;
1163                 goto again;
1164         }
1165         xfs_qm_internalqcheck_get_dquots(mp,
1166                                         (xfs_dqid_t) ip->i_d.di_uid,
1167                                         (xfs_dqid_t) xfs_get_projid(ip),
1168                                         (xfs_dqid_t) ip->i_d.di_gid,
1169                                         &ud, &gd);
1170         if (XFS_IS_UQUOTA_ON(mp)) {
1171                 ASSERT(ud);
1172                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1173         }
1174         if (XFS_IS_OQUOTA_ON(mp)) {
1175                 ASSERT(gd);
1176                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1177         }
1178         xfs_iunlock(ip, lock_flags);
1179         IRELE(ip);
1180         *res = BULKSTAT_RV_DIDONE;
1181         return (0);
1182 }
1183
1184
1185 /* PRIVATE, debugging */
1186 int
1187 xfs_qm_internalqcheck(
1188         xfs_mount_t     *mp)
1189 {
1190         xfs_ino_t       lastino;
1191         int             done, count;
1192         int             i;
1193         int             error;
1194
1195         lastino = 0;
1196         qmtest_hashmask = 32;
1197         count = 5;
1198         done = 0;
1199         qmtest_nfails = 0;
1200
1201         if (! XFS_IS_QUOTA_ON(mp))
1202                 return XFS_ERROR(ESRCH);
1203
1204         xfs_log_force(mp, XFS_LOG_SYNC);
1205         XFS_bflush(mp->m_ddev_targp);
1206         xfs_log_force(mp, XFS_LOG_SYNC);
1207         XFS_bflush(mp->m_ddev_targp);
1208
1209         mutex_lock(&qcheck_lock);
1210         /* There should be absolutely no quota activity while this
1211            is going on. */
1212         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1213                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1214         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1215                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1216         do {
1217                 /*
1218                  * Iterate thru all the inodes in the file system,
1219                  * adjusting the corresponding dquot counters
1220                  */
1221                 error = xfs_bulkstat(mp, &lastino, &count,
1222                                  xfs_qm_internalqcheck_adjust,
1223                                  0, NULL, &done);
1224                 if (error) {
1225                         xfs_debug(mp, "Bulkstat returned error 0x%x", error);
1226                         break;
1227                 }
1228         } while (!done);
1229
1230         xfs_debug(mp, "Checking results against system dquots");
1231         for (i = 0; i < qmtest_hashmask; i++) {
1232                 xfs_dqtest_t    *d, *n;
1233                 xfs_dqhash_t    *h;
1234
1235                 h = &qmtest_udqtab[i];
1236                 list_for_each_entry_safe(d, n, &h->qh_list, q_hashlist) {
1237                         xfs_dqtest_cmp(d);
1238                         kmem_free(d);
1239                 }
1240                 h = &qmtest_gdqtab[i];
1241                 list_for_each_entry_safe(d, n, &h->qh_list, q_hashlist) {
1242                         xfs_dqtest_cmp(d);
1243                         kmem_free(d);
1244                 }
1245         }
1246
1247         if (qmtest_nfails) {
1248                 xfs_debug(mp, "******** quotacheck failed  ********");
1249                 xfs_debug(mp, "failures = %d", qmtest_nfails);
1250         } else {
1251                 xfs_debug(mp, "******** quotacheck successful! ********");
1252         }
1253         kmem_free(qmtest_udqtab);
1254         kmem_free(qmtest_gdqtab);
1255         mutex_unlock(&qcheck_lock);
1256         return (qmtest_nfails);
1257 }
1258
1259 #endif /* DEBUG */