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