fs/xfs/quota/xfs_qm_syscalls.c

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