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

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <linux/capability.h>
  20
  21 #include "xfs.h"
  22 #include "xfs_fs.h"
  23 #include "xfs_bit.h"
  24 #include "xfs_log.h"
  25 #include "xfs_inum.h"
  26 #include "xfs_trans.h"
  27 #include "xfs_sb.h"
  28 #include "xfs_ag.h"
  29 #include "xfs_dir2.h"
  30 #include "xfs_alloc.h"
  31 #include "xfs_dmapi.h"
  32 #include "xfs_quota.h"
  33 #include "xfs_mount.h"
  34 #include "xfs_bmap_btree.h"
  35 #include "xfs_alloc_btree.h"
  36 #include "xfs_ialloc_btree.h"
  37 #include "xfs_dir2_sf.h"
  38 #include "xfs_attr_sf.h"
  39 #include "xfs_dinode.h"
  40 #include "xfs_inode.h"
  41 #include "xfs_ialloc.h"
  42 #include "xfs_itable.h"
  43 #include "xfs_bmap.h"
  44 #include "xfs_btree.h"
  45 #include "xfs_rtalloc.h"
  46 #include "xfs_error.h"
  47 #include "xfs_rw.h"
  48 #include "xfs_acl.h"
  49 #include "xfs_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_scall_trunc_qfiles(xfs_mount_t *, uint);
  61 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
  62                                         fs_disk_quota_t *);
  63 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
  64 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
  65                                         fs_disk_quota_t *);
  66 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
  67 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
  68 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
  69 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
  70                                         uint);
  71 STATIC uint     xfs_qm_import_flags(uint);
  72 STATIC uint     xfs_qm_export_flags(uint);
  73 STATIC uint     xfs_qm_import_qtype_flags(uint);
  74 STATIC uint     xfs_qm_export_qtype_flags(uint);
  75 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
  76                                         fs_disk_quota_t *);
  77
  78
  79 /*
  80  * The main distribution switch of all XFS quotactl system calls.
  81  */
  82 int
  83 xfs_qm_quotactl(
  84         struct bhv_desc *bdp,
  85         int             cmd,
  86         int             id,
  87         xfs_caddr_t     addr)
  88 {
  89         xfs_mount_t     *mp;
  90         bhv_vfs_t       *vfsp;
  91         int             error;
  92
  93         vfsp = bhvtovfs(bdp);
  94         mp = XFS_VFSTOM(vfsp);
  95
  96         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
  97
  98         /*
  99          * The following commands are valid even when quotaoff.
 100          */
 101         switch (cmd) {
 102         case Q_XQUOTARM:
 103                 /*
 104                  * Truncate quota files. quota must be off.
 105                  */
 106                 if (XFS_IS_QUOTA_ON(mp))
 107                         return XFS_ERROR(EINVAL);
 108                 if (vfsp->vfs_flag & VFS_RDONLY)
 109                         return XFS_ERROR(EROFS);
 110                 return (xfs_qm_scall_trunc_qfiles(mp,
 111                                xfs_qm_import_qtype_flags(*(uint *)addr)));
 112
 113         case Q_XGETQSTAT:
 114                 /*
 115                  * Get quota status information.
 116                  */
 117                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
 118
 119         case Q_XQUOTAON:
 120                 /*
 121                  * QUOTAON - enabling quota enforcement.
 122                  * Quota accounting must be turned on at mount time.
 123                  */
 124                 if (vfsp->vfs_flag & VFS_RDONLY)
 125                         return XFS_ERROR(EROFS);
 126                 return (xfs_qm_scall_quotaon(mp,
 127                                           xfs_qm_import_flags(*(uint *)addr)));
 128
 129         case Q_XQUOTAOFF:
 130                 if (vfsp->vfs_flag & VFS_RDONLY)
 131                         return XFS_ERROR(EROFS);
 132                 break;
 133
 134         case Q_XQUOTASYNC:
 135                 return (xfs_sync_inodes(mp, SYNC_DELWRI, NULL));
 136
 137         default:
 138                 break;
 139         }
 140
 141         if (! XFS_IS_QUOTA_ON(mp))
 142                 return XFS_ERROR(ESRCH);
 143
 144         switch (cmd) {
 145         case Q_XQUOTAOFF:
 146                 if (vfsp->vfs_flag & VFS_RDONLY)
 147                         return XFS_ERROR(EROFS);
 148                 error = xfs_qm_scall_quotaoff(mp,
 149                                             xfs_qm_import_flags(*(uint *)addr),
 150                                             B_FALSE);
 151                 break;
 152
 153         case Q_XGETQUOTA:
 154                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 155                                         (fs_disk_quota_t *)addr);
 156                 break;
 157         case Q_XGETGQUOTA:
 158                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 159                                         (fs_disk_quota_t *)addr);
 160                 break;
 161         case Q_XGETPQUOTA:
 162                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 163                                         (fs_disk_quota_t *)addr);
 164                 break;
 165
 166         case Q_XSETQLIM:
 167                 if (vfsp->vfs_flag & VFS_RDONLY)
 168                         return XFS_ERROR(EROFS);
 169                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 170                                              (fs_disk_quota_t *)addr);
 171                 break;
 172         case Q_XSETGQLIM:
 173                 if (vfsp->vfs_flag & VFS_RDONLY)
 174                         return XFS_ERROR(EROFS);
 175                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 176                                              (fs_disk_quota_t *)addr);
 177                 break;
 178         case Q_XSETPQLIM:
 179                 if (vfsp->vfs_flag & VFS_RDONLY)
 180                         return XFS_ERROR(EROFS);
 181                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 182                                              (fs_disk_quota_t *)addr);
 183                 break;
 184
 185         default:
 186                 error = XFS_ERROR(EINVAL);
 187                 break;
 188         }
 189
 190         return (error);
 191 }
 192
 193 /*
 194  * Turn off quota accounting and/or enforcement for all udquots and/or
 195  * gdquots. Called only at unmount time.
 196  *
 197  * This assumes that there are no dquots of this file system cached
 198  * incore, and modifies the ondisk dquot directly. Therefore, for example,
 199  * it is an error to call this twice, without purging the cache.
 200  */
 201 STATIC int
 202 xfs_qm_scall_quotaoff(
 203         xfs_mount_t             *mp,
 204         uint                    flags,
 205         boolean_t               force)
 206 {
 207         uint                    dqtype;
 208         unsigned long   s;
 209         int                     error;
 210         uint                    inactivate_flags;
 211         xfs_qoff_logitem_t      *qoffstart;
 212         int                     nculprits;
 213
 214         if (!force && !capable(CAP_SYS_ADMIN))
 215                 return XFS_ERROR(EPERM);
 216         /*
 217          * No file system can have quotas enabled on disk but not in core.
 218          * Note that quota utilities (like quotaoff) _expect_
 219          * errno == EEXIST here.
 220          */
 221         if ((mp->m_qflags & flags) == 0)
 222                 return XFS_ERROR(EEXIST);
 223         error = 0;
 224
 225         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 226
 227         /*
 228          * We don't want to deal with two quotaoffs messing up each other,
 229          * so we're going to serialize it. quotaoff isn't exactly a performance
 230          * critical thing.
 231          * If quotaoff, then we must be dealing with the root filesystem.
 232          */
 233         ASSERT(mp->m_quotainfo);
 234         if (mp->m_quotainfo)
 235                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 236
 237         ASSERT(mp->m_quotainfo);
 238
 239         /*
 240          * If we're just turning off quota enforcement, change mp and go.
 241          */
 242         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
 243                 mp->m_qflags &= ~(flags);
 244
 245                 s = XFS_SB_LOCK(mp);
 246                 mp->m_sb.sb_qflags = mp->m_qflags;
 247                 XFS_SB_UNLOCK(mp, s);
 248                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 249
 250                 /* XXX what to do if error ? Revert back to old vals incore ? */
 251                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
 252                 return (error);
 253         }
 254
 255         dqtype = 0;
 256         inactivate_flags = 0;
 257         /*
 258          * If accounting is off, we must turn enforcement off, clear the
 259          * quota 'CHKD' certificate to make it known that we have to
 260          * do a quotacheck the next time this quota is turned on.
 261          */
 262         if (flags & XFS_UQUOTA_ACCT) {
 263                 dqtype |= XFS_QMOPT_UQUOTA;
 264                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
 265                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
 266         }
 267         if (flags & XFS_GQUOTA_ACCT) {
 268                 dqtype |= XFS_QMOPT_GQUOTA;
 269                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 270                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
 271         } else if (flags & XFS_PQUOTA_ACCT) {
 272                 dqtype |= XFS_QMOPT_PQUOTA;
 273                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 274                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
 275         }
 276
 277         /*
 278          * Nothing to do?  Don't complain. This happens when we're just
 279          * turning off quota enforcement.
 280          */
 281         if ((mp->m_qflags & flags) == 0) {
 282                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 283                 return (0);
 284         }
 285
 286         /*
 287          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
 288          * and synchronously.
 289          */
 290         xfs_qm_log_quotaoff(mp, &qoffstart, flags);
 291
 292         /*
 293          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
 294          * to take care of the race between dqget and quotaoff. We don't take
 295          * any special locks to reset these bits. All processes need to check
 296          * these bits *after* taking inode lock(s) to see if the particular
 297          * quota type is in the process of being turned off. If *ACTIVE, it is
 298          * guaranteed that all dquot structures and all quotainode ptrs will all
 299          * stay valid as long as that inode is kept locked.
 300          *
 301          * There is no turning back after this.
 302          */
 303         mp->m_qflags &= ~inactivate_flags;
 304
 305         /*
 306          * Give back all the dquot reference(s) held by inodes.
 307          * Here we go thru every single incore inode in this file system, and
 308          * do a dqrele on the i_udquot/i_gdquot that it may have.
 309          * Essentially, as long as somebody has an inode locked, this guarantees
 310          * that quotas will not be turned off. This is handy because in a
 311          * transaction once we lock the inode(s) and check for quotaon, we can
 312          * depend on the quota inodes (and other things) being valid as long as
 313          * we keep the lock(s).
 314          */
 315         xfs_qm_dqrele_all_inodes(mp, flags);
 316
 317         /*
 318          * Next we make the changes in the quota flag in the mount struct.
 319          * This isn't protected by a particular lock directly, because we
 320          * don't want to take a mrlock everytime we depend on quotas being on.
 321          */
 322         mp->m_qflags &= ~(flags);
 323
 324         /*
 325          * Go through all the dquots of this file system and purge them,
 326          * according to what was turned off. We may not be able to get rid
 327          * of all dquots, because dquots can have temporary references that
 328          * are not attached to inodes. eg. xfs_setattr, xfs_create.
 329          * So, if we couldn't purge all the dquots from the filesystem,
 330          * we can't get rid of the incore data structures.
 331          */
 332         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
 333                 delay(10 * nculprits);
 334
 335         /*
 336          * Transactions that had started before ACTIVE state bit was cleared
 337          * could have logged many dquots, so they'd have higher LSNs than
 338          * the first QUOTAOFF log record does. If we happen to crash when
 339          * the tail of the log has gone past the QUOTAOFF record, but
 340          * before the last dquot modification, those dquots __will__
 341          * recover, and that's not good.
 342          *
 343          * So, we have QUOTAOFF start and end logitems; the start
 344          * logitem won't get overwritten until the end logitem appears...
 345          */
 346         xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
 347
 348         /*
 349          * If quotas is completely disabled, close shop.
 350          */
 351         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
 352             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
 353                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 354                 xfs_qm_destroy_quotainfo(mp);
 355                 return (0);
 356         }
 357
 358         /*
 359          * Release our quotainode references, and vn_purge them,
 360          * if we don't need them anymore.
 361          */
 362         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
 363                 XFS_PURGE_INODE(XFS_QI_UQIP(mp));
 364                 XFS_QI_UQIP(mp) = NULL;
 365         }
 366         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
 367                 XFS_PURGE_INODE(XFS_QI_GQIP(mp));
 368                 XFS_QI_GQIP(mp) = NULL;
 369         }
 370         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 371
 372         return (error);
 373 }
 374
 375 STATIC int
 376 xfs_qm_scall_trunc_qfiles(
 377         xfs_mount_t     *mp,
 378         uint            flags)
 379 {
 380         int             error;
 381         xfs_inode_t     *qip;
 382
 383         if (!capable(CAP_SYS_ADMIN))
 384                 return XFS_ERROR(EPERM);
 385         error = 0;
 386         if (!XFS_SB_VERSION_HASQUOTA(&mp->m_sb) || flags == 0) {
 387                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
 388                 return XFS_ERROR(EINVAL);
 389         }
 390
 391         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
 392                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
 393                 if (! error) {
 394                         (void) xfs_truncate_file(mp, qip);
 395                         VN_RELE(XFS_ITOV(qip));
 396                 }
 397         }
 398
 399         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
 400             mp->m_sb.sb_gquotino != NULLFSINO) {
 401                 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
 402                 if (! error) {
 403                         (void) xfs_truncate_file(mp, qip);
 404                         VN_RELE(XFS_ITOV(qip));
 405                 }
 406         }
 407
 408         return (error);
 409 }
 410
 411
 412 /*
 413  * Switch on (a given) quota enforcement for a filesystem.  This takes
 414  * effect immediately.
 415  * (Switching on quota accounting must be done at mount time.)
 416  */
 417 STATIC int
 418 xfs_qm_scall_quotaon(
 419         xfs_mount_t     *mp,
 420         uint            flags)
 421 {
 422         int             error;
 423         unsigned long   s;
 424         uint            qf;
 425         uint            accflags;
 426         __int64_t       sbflags;
 427
 428         if (!capable(CAP_SYS_ADMIN))
 429                 return XFS_ERROR(EPERM);
 430
 431         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 432         /*
 433          * Switching on quota accounting must be done at mount time.
 434          */
 435         accflags = flags & XFS_ALL_QUOTA_ACCT;
 436         flags &= ~(XFS_ALL_QUOTA_ACCT);
 437
 438         sbflags = 0;
 439
 440         if (flags == 0) {
 441                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
 442                 return XFS_ERROR(EINVAL);
 443         }
 444
 445         /* No fs can turn on quotas with a delayed effect */
 446         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 447
 448         /*
 449          * Can't enforce without accounting. We check the superblock
 450          * qflags here instead of m_qflags because rootfs can have
 451          * quota acct on ondisk without m_qflags' knowing.
 452          */
 453         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 454             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 455             (flags & XFS_UQUOTA_ENFD))
 456             ||
 457             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 458             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 459             (flags & XFS_GQUOTA_ACCT) == 0 &&
 460             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 461             (flags & XFS_OQUOTA_ENFD))) {
 462                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 463                         flags, mp->m_sb.sb_qflags);
 464                 return XFS_ERROR(EINVAL);
 465         }
 466         /*
 467          * If everything's upto-date incore, then don't waste time.
 468          */
 469         if ((mp->m_qflags & flags) == flags)
 470                 return XFS_ERROR(EEXIST);
 471
 472         /*
 473          * Change sb_qflags on disk but not incore mp->qflags
 474          * if this is the root filesystem.
 475          */
 476         s = XFS_SB_LOCK(mp);
 477         qf = mp->m_sb.sb_qflags;
 478         mp->m_sb.sb_qflags = qf | flags;
 479         XFS_SB_UNLOCK(mp, s);
 480
 481         /*
 482          * There's nothing to change if it's the same.
 483          */
 484         if ((qf & flags) == flags && sbflags == 0)
 485                 return XFS_ERROR(EEXIST);
 486         sbflags |= XFS_SB_QFLAGS;
 487
 488         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 489                 return (error);
 490         /*
 491          * If we aren't trying to switch on quota enforcement, we are done.
 492          */
 493         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 494              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 495              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 496              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 497              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 498              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 499             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 500                 return (0);
 501
 502         if (! XFS_IS_QUOTA_RUNNING(mp))
 503                 return XFS_ERROR(ESRCH);
 504
 505         /*
 506          * Switch on quota enforcement in core.
 507          */
 508         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 509         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 510         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 511
 512         return (0);
 513 }
 514
 515
 516 /*
 517  * Return quota status information, such as uquota-off, enforcements, etc.
 518  */
 519 STATIC int
 520 xfs_qm_scall_getqstat(
 521         xfs_mount_t     *mp,
 522         fs_quota_stat_t *out)
 523 {
 524         xfs_inode_t     *uip, *gip;
 525         boolean_t       tempuqip, tempgqip;
 526
 527         uip = gip = NULL;
 528         tempuqip = tempgqip = B_FALSE;
 529         memset(out, 0, sizeof(fs_quota_stat_t));
 530
 531         out->qs_version = FS_QSTAT_VERSION;
 532         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
 533                 out->qs_uquota.qfs_ino = NULLFSINO;
 534                 out->qs_gquota.qfs_ino = NULLFSINO;
 535                 return (0);
 536         }
 537         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 538                                                         (XFS_ALL_QUOTA_ACCT|
 539                                                          XFS_ALL_QUOTA_ENFD));
 540         out->qs_pad = 0;
 541         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 542         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 543
 544         if (mp->m_quotainfo) {
 545                 uip = mp->m_quotainfo->qi_uquotaip;
 546                 gip = mp->m_quotainfo->qi_gquotaip;
 547         }
 548         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 549                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 550                                         0, 0, &uip, 0) == 0)
 551                         tempuqip = B_TRUE;
 552         }
 553         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 554                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 555                                         0, 0, &gip, 0) == 0)
 556                         tempgqip = B_TRUE;
 557         }
 558         if (uip) {
 559                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 560                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 561                 if (tempuqip)
 562                         VN_RELE(XFS_ITOV(uip));
 563         }
 564         if (gip) {
 565                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 566                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 567                 if (tempgqip)
 568                         VN_RELE(XFS_ITOV(gip));
 569         }
 570         if (mp->m_quotainfo) {
 571                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 572                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 573                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 574                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 575                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 576                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 577         }
 578         return (0);
 579 }
 580
 581 /*
 582  * Adjust quota limits, and start/stop timers accordingly.
 583  */
 584 STATIC int
 585 xfs_qm_scall_setqlim(
 586         xfs_mount_t             *mp,
 587         xfs_dqid_t              id,
 588         uint                    type,
 589         fs_disk_quota_t         *newlim)
 590 {
 591         xfs_disk_dquot_t        *ddq;
 592         xfs_dquot_t             *dqp;
 593         xfs_trans_t             *tp;
 594         int                     error;
 595         xfs_qcnt_t              hard, soft;
 596
 597         if (!capable(CAP_SYS_ADMIN))
 598                 return XFS_ERROR(EPERM);
 599
 600         if ((newlim->d_fieldmask &
 601             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 602                 return (0);
 603
 604         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 605         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 606                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 607                 xfs_trans_cancel(tp, 0);
 608                 return (error);
 609         }
 610
 611         /*
 612          * We don't want to race with a quotaoff so take the quotaoff lock.
 613          * (We don't hold an inode lock, so there's nothing else to stop
 614          * a quotaoff from happening). (XXXThis doesn't currently happen
 615          * because we take the vfslock before calling xfs_qm_sysent).
 616          */
 617         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 618
 619         /*
 620          * Get the dquot (locked), and join it to the transaction.
 621          * Allocate the dquot if this doesn't exist.
 622          */
 623         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 624                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 625                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 626                 ASSERT(error != ENOENT);
 627                 return (error);
 628         }
 629         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 630         xfs_trans_dqjoin(tp, dqp);
 631         ddq = &dqp->q_core;
 632
 633         /*
 634          * Make sure that hardlimits are >= soft limits before changing.
 635          */
 636         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 637                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 638                         be64_to_cpu(ddq->d_blk_hardlimit);
 639         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 640                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 641                         be64_to_cpu(ddq->d_blk_softlimit);
 642         if (hard == 0 || hard >= soft) {
 643                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 644                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 645                 if (id == 0) {
 646                         mp->m_quotainfo->qi_bhardlimit = hard;
 647                         mp->m_quotainfo->qi_bsoftlimit = soft;
 648                 }
 649         } else {
 650                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 651         }
 652         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 653                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 654                         be64_to_cpu(ddq->d_rtb_hardlimit);
 655         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 656                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 657                         be64_to_cpu(ddq->d_rtb_softlimit);
 658         if (hard == 0 || hard >= soft) {
 659                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 660                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 661                 if (id == 0) {
 662                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 663                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 664                 }
 665         } else {
 666                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 667         }
 668
 669         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 670                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 671                         be64_to_cpu(ddq->d_ino_hardlimit);
 672         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 673                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 674                         be64_to_cpu(ddq->d_ino_softlimit);
 675         if (hard == 0 || hard >= soft) {
 676                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 677                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 678                 if (id == 0) {
 679                         mp->m_quotainfo->qi_ihardlimit = hard;
 680                         mp->m_quotainfo->qi_isoftlimit = soft;
 681                 }
 682         } else {
 683                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 684         }
 685
 686         /*
 687          * Update warnings counter(s) if requested
 688          */
 689         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 690                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 691         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 692                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 693         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 694                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 695
 696         if (id == 0) {
 697                 /*
 698                  * Timelimits for the super user set the relative time
 699                  * the other users can be over quota for this file system.
 700                  * If it is zero a default is used.  Ditto for the default
 701                  * soft and hard limit values (already done, above), and
 702                  * for warnings.
 703                  */
 704                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 705                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 706                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 707                 }
 708                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 709                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 710                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 711                 }
 712                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 713                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 714                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 715                 }
 716                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 717                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 718                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 719                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 720                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 721                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 722         } else {
 723                 /*
 724                  * If the user is now over quota, start the timelimit.
 725                  * The user will not be 'warned'.
 726                  * Note that we keep the timers ticking, whether enforcement
 727                  * is on or off. We don't really want to bother with iterating
 728                  * over all ondisk dquots and turning the timers on/off.
 729                  */
 730                 xfs_qm_adjust_dqtimers(mp, ddq);
 731         }
 732         dqp->dq_flags |= XFS_DQ_DIRTY;
 733         xfs_trans_log_dquot(tp, dqp);
 734
 735         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 736         xfs_trans_commit(tp, 0);
 737         xfs_qm_dqprint(dqp);
 738         xfs_qm_dqrele(dqp);
 739         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 740
 741         return (0);
 742 }
 743
 744 STATIC int
 745 xfs_qm_scall_getquota(
 746         xfs_mount_t     *mp,
 747         xfs_dqid_t      id,
 748         uint            type,
 749         fs_disk_quota_t *out)
 750 {
 751         xfs_dquot_t     *dqp;
 752         int             error;
 753
 754         /*
 755          * Try to get the dquot. We don't want it allocated on disk, so
 756          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 757          * exist, we'll get ENOENT back.
 758          */
 759         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 760                 return (error);
 761         }
 762
 763         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 764         /*
 765          * If everything's NULL, this dquot doesn't quite exist as far as
 766          * our utility programs are concerned.
 767          */
 768         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 769                 xfs_qm_dqput(dqp);
 770                 return XFS_ERROR(ENOENT);
 771         }
 772         /* xfs_qm_dqprint(dqp); */
 773         /*
 774          * Convert the disk dquot to the exportable format
 775          */
 776         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 777         xfs_qm_dqput(dqp);
 778         return (error ? XFS_ERROR(EFAULT) : 0);
 779 }
 780
 781
 782 STATIC int
 783 xfs_qm_log_quotaoff_end(
 784         xfs_mount_t             *mp,
 785         xfs_qoff_logitem_t      *startqoff,
 786         uint                    flags)
 787 {
 788         xfs_trans_t             *tp;
 789         int                     error;
 790         xfs_qoff_logitem_t      *qoffi;
 791
 792         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 793
 794         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 795                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 796                 xfs_trans_cancel(tp, 0);
 797                 return (error);
 798         }
 799
 800         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 801                                         flags & XFS_ALL_QUOTA_ACCT);
 802         xfs_trans_log_quotaoff_item(tp, qoffi);
 803
 804         /*
 805          * We have to make sure that the transaction is secure on disk before we
 806          * return and actually stop quota accounting. So, make it synchronous.
 807          * We don't care about quotoff's performance.
 808          */
 809         xfs_trans_set_sync(tp);
 810         error = xfs_trans_commit(tp, 0);
 811         return (error);
 812 }
 813
 814
 815 STATIC int
 816 xfs_qm_log_quotaoff(
 817         xfs_mount_t            *mp,
 818         xfs_qoff_logitem_t     **qoffstartp,
 819         uint                   flags)
 820 {
 821         xfs_trans_t            *tp;
 822         int                     error;
 823         unsigned long   s;
 824         xfs_qoff_logitem_t     *qoffi=NULL;
 825         uint                    oldsbqflag=0;
 826
 827         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 828         if ((error = xfs_trans_reserve(tp, 0,
 829                                       sizeof(xfs_qoff_logitem_t) * 2 +
 830                                       mp->m_sb.sb_sectsize + 128,
 831                                       0,
 832                                       0,
 833                                       XFS_DEFAULT_LOG_COUNT))) {
 834                 goto error0;
 835         }
 836
 837         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 838         xfs_trans_log_quotaoff_item(tp, qoffi);
 839
 840         s = XFS_SB_LOCK(mp);
 841         oldsbqflag = mp->m_sb.sb_qflags;
 842         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 843         XFS_SB_UNLOCK(mp, s);
 844
 845         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 846
 847         /*
 848          * We have to make sure that the transaction is secure on disk before we
 849          * return and actually stop quota accounting. So, make it synchronous.
 850          * We don't care about quotoff's performance.
 851          */
 852         xfs_trans_set_sync(tp);
 853         error = xfs_trans_commit(tp, 0);
 854
 855 error0:
 856         if (error) {
 857                 xfs_trans_cancel(tp, 0);
 858                 /*
 859                  * No one else is modifying sb_qflags, so this is OK.
 860                  * We still hold the quotaofflock.
 861                  */
 862                 s = XFS_SB_LOCK(mp);
 863                 mp->m_sb.sb_qflags = oldsbqflag;
 864                 XFS_SB_UNLOCK(mp, s);
 865         }
 866         *qoffstartp = qoffi;
 867         return (error);
 868 }
 869
 870
 871 /*
 872  * Translate an internal style on-disk-dquot to the exportable format.
 873  * The main differences are that the counters/limits are all in Basic
 874  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 875  * to be converted to the native endianness.
 876  */
 877 STATIC void
 878 xfs_qm_export_dquot(
 879         xfs_mount_t             *mp,
 880         xfs_disk_dquot_t        *src,
 881         struct fs_disk_quota    *dst)
 882 {
 883         memset(dst, 0, sizeof(*dst));
 884         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 885         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 886         dst->d_id = be32_to_cpu(src->d_id);
 887         dst->d_blk_hardlimit =
 888                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 889         dst->d_blk_softlimit =
 890                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 891         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 892         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 893         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 894         dst->d_icount = be64_to_cpu(src->d_icount);
 895         dst->d_btimer = be32_to_cpu(src->d_btimer);
 896         dst->d_itimer = be32_to_cpu(src->d_itimer);
 897         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 898         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 899         dst->d_rtb_hardlimit =
 900                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 901         dst->d_rtb_softlimit =
 902                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 903         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 904         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 905         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 906
 907         /*
 908          * Internally, we don't reset all the timers when quota enforcement
 909          * gets turned off. No need to confuse the user level code,
 910          * so return zeroes in that case.
 911          */
 912         if (! XFS_IS_QUOTA_ENFORCED(mp)) {
 913                 dst->d_btimer = 0;
 914                 dst->d_itimer = 0;
 915                 dst->d_rtbtimer = 0;
 916         }
 917
 918 #ifdef DEBUG
 919         if (XFS_IS_QUOTA_ENFORCED(mp) && dst->d_id != 0) {
 920                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 921                     (dst->d_blk_softlimit > 0)) {
 922                         ASSERT(dst->d_btimer != 0);
 923                 }
 924                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 925                     (dst->d_ino_softlimit > 0)) {
 926                         ASSERT(dst->d_itimer != 0);
 927                 }
 928         }
 929 #endif
 930 }
 931
 932 STATIC uint
 933 xfs_qm_import_qtype_flags(
 934         uint            uflags)
 935 {
 936         uint            oflags = 0;
 937
 938         /*
 939          * Can't be more than one, or none.
 940          */
 941         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 942                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 943             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 944                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 945             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 946                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 947             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 948                 return (0);
 949
 950         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 951         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 952         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 953         return oflags;
 954 }
 955
 956 STATIC uint
 957 xfs_qm_export_qtype_flags(
 958         uint flags)
 959 {
 960         /*
 961          * Can't be more than one, or none.
 962          */
 963         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 964                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 965         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 966                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 967         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 968                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 969         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 970
 971         return (flags & XFS_DQ_USER) ?
 972                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 973                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 974 }
 975
 976 STATIC uint
 977 xfs_qm_import_flags(
 978         uint uflags)
 979 {
 980         uint flags = 0;
 981
 982         if (uflags & XFS_QUOTA_UDQ_ACCT)
 983                 flags |= XFS_UQUOTA_ACCT;
 984         if (uflags & XFS_QUOTA_PDQ_ACCT)
 985                 flags |= XFS_PQUOTA_ACCT;
 986         if (uflags & XFS_QUOTA_GDQ_ACCT)
 987                 flags |= XFS_GQUOTA_ACCT;
 988         if (uflags & XFS_QUOTA_UDQ_ENFD)
 989                 flags |= XFS_UQUOTA_ENFD;
 990         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 991                 flags |= XFS_OQUOTA_ENFD;
 992         return (flags);
 993 }
 994
 995
 996 STATIC uint
 997 xfs_qm_export_flags(
 998         uint flags)
 999 {
1000         uint uflags;
1001
1002         uflags = 0;
1003         if (flags & XFS_UQUOTA_ACCT)
1004                 uflags |= XFS_QUOTA_UDQ_ACCT;
1005         if (flags & XFS_PQUOTA_ACCT)
1006                 uflags |= XFS_QUOTA_PDQ_ACCT;
1007         if (flags & XFS_GQUOTA_ACCT)
1008                 uflags |= XFS_QUOTA_GDQ_ACCT;
1009         if (flags & XFS_UQUOTA_ENFD)
1010                 uflags |= XFS_QUOTA_UDQ_ENFD;
1011         if (flags & (XFS_OQUOTA_ENFD)) {
1012                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1013                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1014         }
1015         return (uflags);
1016 }
1017
1018
1019 /*
1020  * Go thru all the inodes in the file system, releasing their dquots.
1021  * Note that the mount structure gets modified to indicate that quotas are off
1022  * AFTER this, in the case of quotaoff. This also gets called from
1023  * xfs_rootumount.
1024  */
1025 void
1026 xfs_qm_dqrele_all_inodes(
1027         struct xfs_mount *mp,
1028         uint             flags)
1029 {
1030         xfs_inode_t     *ip, *topino;
1031         uint            ireclaims;
1032         bhv_vnode_t     *vp;
1033         boolean_t       vnode_refd;
1034
1035         ASSERT(mp->m_quotainfo);
1036
1037         XFS_MOUNT_ILOCK(mp);
1038 again:
1039         ip = mp->m_inodes;
1040         if (ip == NULL) {
1041                 XFS_MOUNT_IUNLOCK(mp);
1042                 return;
1043         }
1044         do {
1045                 /* Skip markers inserted by xfs_sync */
1046                 if (ip->i_mount == NULL) {
1047                         ip = ip->i_mnext;
1048                         continue;
1049                 }
1050                 /* Root inode, rbmip and rsumip have associated blocks */
1051                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1052                         ASSERT(ip->i_udquot == NULL);
1053                         ASSERT(ip->i_gdquot == NULL);
1054                         ip = ip->i_mnext;
1055                         continue;
1056                 }
1057                 vp = XFS_ITOV_NULL(ip);
1058                 if (!vp) {
1059                         ASSERT(ip->i_udquot == NULL);
1060                         ASSERT(ip->i_gdquot == NULL);
1061                         ip = ip->i_mnext;
1062                         continue;
1063                 }
1064                 vnode_refd = B_FALSE;
1065                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1066                         ireclaims = mp->m_ireclaims;
1067                         topino = mp->m_inodes;
1068                         vp = vn_grab(vp);
1069                         if (!vp)
1070                                 goto again;
1071
1072                         XFS_MOUNT_IUNLOCK(mp);
1073                         /* XXX restart limit ? */
1074                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1075                         vnode_refd = B_TRUE;
1076                 } else {
1077                         ireclaims = mp->m_ireclaims;
1078                         topino = mp->m_inodes;
1079                         XFS_MOUNT_IUNLOCK(mp);
1080                 }
1081
1082                 /*
1083                  * We don't keep the mountlock across the dqrele() call,
1084                  * since it can take a while..
1085                  */
1086                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1087                         xfs_qm_dqrele(ip->i_udquot);
1088                         ip->i_udquot = NULL;
1089                 }
1090                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1091                         xfs_qm_dqrele(ip->i_gdquot);
1092                         ip->i_gdquot = NULL;
1093                 }
1094                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1095                 /*
1096                  * Wait until we've dropped the ilock and mountlock to
1097                  * do the vn_rele. Or be condemned to an eternity in the
1098                  * inactive code in hell.
1099                  */
1100                 if (vnode_refd)
1101                         VN_RELE(vp);
1102                 XFS_MOUNT_ILOCK(mp);
1103                 /*
1104                  * If an inode was inserted or removed, we gotta
1105                  * start over again.
1106                  */
1107                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1108                         /* XXX use a sentinel */
1109                         goto again;
1110                 }
1111                 ip = ip->i_mnext;
1112         } while (ip != mp->m_inodes);
1113
1114         XFS_MOUNT_IUNLOCK(mp);
1115 }
1116
1117 /*------------------------------------------------------------------------*/
1118 #ifdef DEBUG
1119 /*
1120  * This contains all the test functions for XFS disk quotas.
1121  * Currently it does a quota accounting check. ie. it walks through
1122  * all inodes in the file system, calculating the dquot accounting fields,
1123  * and prints out any inconsistencies.
1124  */
1125 xfs_dqhash_t *qmtest_udqtab;
1126 xfs_dqhash_t *qmtest_gdqtab;
1127 int           qmtest_hashmask;
1128 int           qmtest_nfails;
1129 mutex_t       qcheck_lock;
1130
1131 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1132                                  (__psunsigned_t)(id)) & \
1133                                 (qmtest_hashmask - 1))
1134
1135 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1136                                      (qmtest_udqtab + \
1137                                       DQTEST_HASHVAL(mp, id)) : \
1138                                      (qmtest_gdqtab + \
1139                                       DQTEST_HASHVAL(mp, id)))
1140
1141 #define DQTEST_LIST_PRINT(l, NXT, title) \
1142 { \
1143           xfs_dqtest_t  *dqp; int i = 0;\
1144           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1145           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1146                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1147                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1148                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1149                          dqp->d_bcount, dqp->d_icount); } \
1150 }
1151
1152 typedef struct dqtest {
1153         xfs_dqmarker_t  q_lists;
1154         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1155         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1156         xfs_dqid_t      d_id;           /* user id or group id */
1157         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1158         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1159 } xfs_dqtest_t;
1160
1161 STATIC void
1162 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1163 {
1164         xfs_dquot_t *d;
1165         if (((d) = (h)->qh_next))
1166                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1167         (dqp)->HL_NEXT = d;
1168         (dqp)->HL_PREVP = &((h)->qh_next);
1169         (h)->qh_next = (xfs_dquot_t *)dqp;
1170         (h)->qh_version++;
1171         (h)->qh_nelems++;
1172 }
1173 STATIC void
1174 xfs_qm_dqtest_print(
1175         xfs_dqtest_t    *d)
1176 {
1177         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1178         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1179         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1180         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1181                 d->d_bcount, (int)d->d_bcount);
1182         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1183                 d->d_icount, (int)d->d_icount);
1184         cmn_err(CE_DEBUG, "---------------------------");
1185 }
1186
1187 STATIC void
1188 xfs_qm_dqtest_failed(
1189         xfs_dqtest_t    *d,
1190         xfs_dquot_t     *dqp,
1191         char            *reason,
1192         xfs_qcnt_t      a,
1193         xfs_qcnt_t      b,
1194         int             error)
1195 {
1196         qmtest_nfails++;
1197         if (error)
1198                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1199                        d->d_id, error, reason);
1200         else
1201                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1202                        d->d_id, reason, (int)a, (int)b);
1203         xfs_qm_dqtest_print(d);
1204         if (dqp)
1205                 xfs_qm_dqprint(dqp);
1206 }
1207
1208 STATIC int
1209 xfs_dqtest_cmp2(
1210         xfs_dqtest_t    *d,
1211         xfs_dquot_t     *dqp)
1212 {
1213         int err = 0;
1214         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1215                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1216                         be64_to_cpu(dqp->q_core.d_icount),
1217                         d->d_icount, 0);
1218                 err++;
1219         }
1220         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1221                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1222                         be64_to_cpu(dqp->q_core.d_bcount),
1223                         d->d_bcount, 0);
1224                 err++;
1225         }
1226         if (dqp->q_core.d_blk_softlimit &&
1227             be64_to_cpu(dqp->q_core.d_bcount) >=
1228             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1229                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1230                         cmn_err(CE_DEBUG,
1231                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1232                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1233                         err++;
1234                 }
1235         }
1236         if (dqp->q_core.d_ino_softlimit &&
1237             be64_to_cpu(dqp->q_core.d_icount) >=
1238             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1239                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1240                         cmn_err(CE_DEBUG,
1241                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1242                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1243                         err++;
1244                 }
1245         }
1246 #ifdef QUOTADEBUG
1247         if (!err) {
1248                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1249                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1250         }
1251 #endif
1252         return (err);
1253 }
1254
1255 STATIC void
1256 xfs_dqtest_cmp(
1257         xfs_dqtest_t    *d)
1258 {
1259         xfs_dquot_t     *dqp;
1260         int             error;
1261
1262         /* xfs_qm_dqtest_print(d); */
1263         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1264                                  &dqp))) {
1265                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1266                 return;
1267         }
1268         xfs_dqtest_cmp2(d, dqp);
1269         xfs_qm_dqput(dqp);
1270 }
1271
1272 STATIC int
1273 xfs_qm_internalqcheck_dqget(
1274         xfs_mount_t     *mp,
1275         xfs_dqid_t      id,
1276         uint            type,
1277         xfs_dqtest_t    **O_dq)
1278 {
1279         xfs_dqtest_t    *d;
1280         xfs_dqhash_t    *h;
1281
1282         h = DQTEST_HASH(mp, id, type);
1283         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1284              d = (xfs_dqtest_t *) d->HL_NEXT) {
1285                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1286                 if (d->d_id == id && mp == d->q_mount) {
1287                         *O_dq = d;
1288                         return (0);
1289                 }
1290         }
1291         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1292         d->dq_flags = type;
1293         d->d_id = id;
1294         d->q_mount = mp;
1295         d->q_hash = h;
1296         xfs_qm_hashinsert(h, d);
1297         *O_dq = d;
1298         return (0);
1299 }
1300
1301 STATIC void
1302 xfs_qm_internalqcheck_get_dquots(
1303         xfs_mount_t     *mp,
1304         xfs_dqid_t      uid,
1305         xfs_dqid_t      projid,
1306         xfs_dqid_t      gid,
1307         xfs_dqtest_t    **ud,
1308         xfs_dqtest_t    **gd)
1309 {
1310         if (XFS_IS_UQUOTA_ON(mp))
1311                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1312         if (XFS_IS_GQUOTA_ON(mp))
1313                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1314         else if (XFS_IS_PQUOTA_ON(mp))
1315                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1316 }
1317
1318
1319 STATIC void
1320 xfs_qm_internalqcheck_dqadjust(
1321         xfs_inode_t             *ip,
1322         xfs_dqtest_t            *d)
1323 {
1324         d->d_icount++;
1325         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1326 }
1327
1328 STATIC int
1329 xfs_qm_internalqcheck_adjust(
1330         xfs_mount_t     *mp,            /* mount point for filesystem */
1331         xfs_ino_t       ino,            /* inode number to get data for */
1332         void            __user *buffer, /* not used */
1333         int             ubsize,         /* not used */
1334         void            *private_data,  /* not used */
1335         xfs_daddr_t     bno,            /* starting block of inode cluster */
1336         int             *ubused,        /* not used */
1337         void            *dip,           /* not used */
1338         int             *res)           /* bulkstat result code */
1339 {
1340         xfs_inode_t             *ip;
1341         xfs_dqtest_t            *ud, *gd;
1342         uint                    lock_flags;
1343         boolean_t               ipreleased;
1344         int                     error;
1345
1346         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1347
1348         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1349                 *res = BULKSTAT_RV_NOTHING;
1350                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1351                         (unsigned long long) ino,
1352                         (unsigned long long) mp->m_sb.sb_uquotino,
1353                         (unsigned long long) mp->m_sb.sb_gquotino);
1354                 return XFS_ERROR(EINVAL);
1355         }
1356         ipreleased = B_FALSE;
1357  again:
1358         lock_flags = XFS_ILOCK_SHARED;
1359         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1360                 *res = BULKSTAT_RV_NOTHING;
1361                 return (error);
1362         }
1363
1364         if (ip->i_d.di_mode == 0) {
1365                 xfs_iput_new(ip, lock_flags);
1366                 *res = BULKSTAT_RV_NOTHING;
1367                 return XFS_ERROR(ENOENT);
1368         }
1369
1370         /*
1371          * This inode can have blocks after eof which can get released
1372          * when we send it to inactive. Since we don't check the dquot
1373          * until the after all our calculations are done, we must get rid
1374          * of those now.
1375          */
1376         if (! ipreleased) {
1377                 xfs_iput(ip, lock_flags);
1378                 ipreleased = B_TRUE;
1379                 goto again;
1380         }
1381         xfs_qm_internalqcheck_get_dquots(mp,
1382                                         (xfs_dqid_t) ip->i_d.di_uid,
1383                                         (xfs_dqid_t) ip->i_d.di_projid,
1384                                         (xfs_dqid_t) ip->i_d.di_gid,
1385                                         &ud, &gd);
1386         if (XFS_IS_UQUOTA_ON(mp)) {
1387                 ASSERT(ud);
1388                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1389         }
1390         if (XFS_IS_OQUOTA_ON(mp)) {
1391                 ASSERT(gd);
1392                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1393         }
1394         xfs_iput(ip, lock_flags);
1395         *res = BULKSTAT_RV_DIDONE;
1396         return (0);
1397 }
1398
1399
1400 /* PRIVATE, debugging */
1401 int
1402 xfs_qm_internalqcheck(
1403         xfs_mount_t     *mp)
1404 {
1405         xfs_ino_t       lastino;
1406         int             done, count;
1407         int             i;
1408         xfs_dqtest_t    *d, *e;
1409         xfs_dqhash_t    *h1;
1410         int             error;
1411
1412         lastino = 0;
1413         qmtest_hashmask = 32;
1414         count = 5;
1415         done = 0;
1416         qmtest_nfails = 0;
1417
1418         if (! XFS_IS_QUOTA_ON(mp))
1419                 return XFS_ERROR(ESRCH);
1420
1421         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1422         XFS_bflush(mp->m_ddev_targp);
1423         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1424         XFS_bflush(mp->m_ddev_targp);
1425
1426         mutex_lock(&qcheck_lock);
1427         /* There should be absolutely no quota activity while this
1428            is going on. */
1429         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1430                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1431         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1432                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1433         do {
1434                 /*
1435                  * Iterate thru all the inodes in the file system,
1436                  * adjusting the corresponding dquot counters
1437                  */
1438                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1439                                  xfs_qm_internalqcheck_adjust, NULL,
1440                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1441                         break;
1442                 }
1443         } while (! done);
1444         if (error) {
1445                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1446         }
1447         cmn_err(CE_DEBUG, "Checking results against system dquots");
1448         for (i = 0; i < qmtest_hashmask; i++) {
1449                 h1 = &qmtest_udqtab[i];
1450                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1451                         xfs_dqtest_cmp(d);
1452                         e = (xfs_dqtest_t *) d->HL_NEXT;
1453                         kmem_free(d, sizeof(xfs_dqtest_t));
1454                         d = e;
1455                 }
1456                 h1 = &qmtest_gdqtab[i];
1457                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1458                         xfs_dqtest_cmp(d);
1459                         e = (xfs_dqtest_t *) d->HL_NEXT;
1460                         kmem_free(d, sizeof(xfs_dqtest_t));
1461                         d = e;
1462                 }
1463         }
1464
1465         if (qmtest_nfails) {
1466                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1467                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1468         } else {
1469                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1470         }
1471         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1472         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1473         mutex_unlock(&qcheck_lock);
1474         return (qmtest_nfails);
1475 }
1476
1477 #endif /* DEBUG */