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 #include <linux/vs_base.h>
  21
  22 #include "xfs.h"
  23 #include "xfs_fs.h"
  24 #include "xfs_bit.h"
  25 #include "xfs_log.h"
  26 #include "xfs_inum.h"
  27 #include "xfs_trans.h"
  28 #include "xfs_sb.h"
  29 #include "xfs_ag.h"
  30 #include "xfs_dir.h"
  31 #include "xfs_dir2.h"
  32 #include "xfs_alloc.h"
  33 #include "xfs_dmapi.h"
  34 #include "xfs_quota.h"
  35 #include "xfs_mount.h"
  36 #include "xfs_bmap_btree.h"
  37 #include "xfs_alloc_btree.h"
  38 #include "xfs_ialloc_btree.h"
  39 #include "xfs_dir_sf.h"
  40 #include "xfs_dir2_sf.h"
  41 #include "xfs_attr_sf.h"
  42 #include "xfs_dinode.h"
  43 #include "xfs_inode.h"
  44 #include "xfs_ialloc.h"
  45 #include "xfs_itable.h"
  46 #include "xfs_bmap.h"
  47 #include "xfs_btree.h"
  48 #include "xfs_rtalloc.h"
  49 #include "xfs_error.h"
  50 #include "xfs_rw.h"
  51 #include "xfs_acl.h"
  52 #include "xfs_cap.h"
  53 #include "xfs_mac.h"
  54 #include "xfs_attr.h"
  55 #include "xfs_buf_item.h"
  56 #include "xfs_utils.h"
  57 #include "xfs_qm.h"
  58
  59 #ifdef DEBUG
  60 # define qdprintk(s, args...)   cmn_err(CE_DEBUG, s, ## args)
  61 #else
  62 # define qdprintk(s, args...)   do { } while (0)
  63 #endif
  64
  65 STATIC int      xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
  66 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
  67                                         fs_disk_quota_t *);
  68 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
  69 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
  70                                         fs_disk_quota_t *);
  71 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
  72 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
  73 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
  74 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
  75                                         uint);
  76 STATIC uint     xfs_qm_import_flags(uint);
  77 STATIC uint     xfs_qm_export_flags(uint);
  78 STATIC uint     xfs_qm_import_qtype_flags(uint);
  79 STATIC uint     xfs_qm_export_qtype_flags(uint);
  80 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
  81                                         fs_disk_quota_t *);
  82
  83
  84 /*
  85  * The main distribution switch of all XFS quotactl system calls.
  86  */
  87 int
  88 xfs_qm_quotactl(
  89         struct bhv_desc *bdp,
  90         int             cmd,
  91         int             id,
  92         xfs_caddr_t     addr)
  93 {
  94         xfs_mount_t     *mp;
  95         int             error;
  96         struct vfs      *vfsp;
  97
  98         vfsp = bhvtovfs(bdp);
  99         mp = XFS_VFSTOM(vfsp);
 100
 101         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
 102
 103         /*
 104          * The following commands are valid even when quotaoff.
 105          */
 106         switch (cmd) {
 107         case Q_XQUOTARM:
 108                 /*
 109                  * Truncate quota files. quota must be off.
 110                  */
 111                 if (XFS_IS_QUOTA_ON(mp))
 112                         return XFS_ERROR(EINVAL);
 113                 if (vfsp->vfs_flag & VFS_RDONLY)
 114                         return XFS_ERROR(EROFS);
 115                 return (xfs_qm_scall_trunc_qfiles(mp,
 116                                xfs_qm_import_qtype_flags(*(uint *)addr)));
 117
 118         case Q_XGETQSTAT:
 119                 /*
 120                  * Get quota status information.
 121                  */
 122                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
 123
 124         case Q_XQUOTAON:
 125                 /*
 126                  * QUOTAON - enabling quota enforcement.
 127                  * Quota accounting must be turned on at mount time.
 128                  */
 129                 if (vfsp->vfs_flag & VFS_RDONLY)
 130                         return XFS_ERROR(EROFS);
 131                 return (xfs_qm_scall_quotaon(mp,
 132                                           xfs_qm_import_flags(*(uint *)addr)));
 133
 134         case Q_XQUOTAOFF:
 135                 if (vfsp->vfs_flag & VFS_RDONLY)
 136                         return XFS_ERROR(EROFS);
 137                 break;
 138
 139         case Q_XQUOTASYNC:
 140                 return (xfs_sync_inodes(mp, SYNC_DELWRI, 0, NULL));
 141
 142         default:
 143                 break;
 144         }
 145
 146         if (! XFS_IS_QUOTA_ON(mp))
 147                 return XFS_ERROR(ESRCH);
 148
 149         switch (cmd) {
 150         case Q_XQUOTAOFF:
 151                 if (vfsp->vfs_flag & VFS_RDONLY)
 152                         return XFS_ERROR(EROFS);
 153                 error = xfs_qm_scall_quotaoff(mp,
 154                                             xfs_qm_import_flags(*(uint *)addr),
 155                                             B_FALSE);
 156                 break;
 157
 158         case Q_XGETQUOTA:
 159                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 160                                         (fs_disk_quota_t *)addr);
 161                 break;
 162         case Q_XGETGQUOTA:
 163                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 164                                         (fs_disk_quota_t *)addr);
 165                 break;
 166         case Q_XGETPQUOTA:
 167                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 168                                         (fs_disk_quota_t *)addr);
 169                 break;
 170
 171         case Q_XSETQLIM:
 172                 if (vfsp->vfs_flag & VFS_RDONLY)
 173                         return XFS_ERROR(EROFS);
 174                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 175                                              (fs_disk_quota_t *)addr);
 176                 break;
 177         case Q_XSETGQLIM:
 178                 if (vfsp->vfs_flag & VFS_RDONLY)
 179                         return XFS_ERROR(EROFS);
 180                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 181                                              (fs_disk_quota_t *)addr);
 182                 break;
 183         case Q_XSETPQLIM:
 184                 if (vfsp->vfs_flag & VFS_RDONLY)
 185                         return XFS_ERROR(EROFS);
 186                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 187                                              (fs_disk_quota_t *)addr);
 188                 break;
 189
 190         default:
 191                 error = XFS_ERROR(EINVAL);
 192                 break;
 193         }
 194
 195         return (error);
 196 }
 197
 198 /*
 199  * Turn off quota accounting and/or enforcement for all udquots and/or
 200  * gdquots. Called only at unmount time.
 201  *
 202  * This assumes that there are no dquots of this file system cached
 203  * incore, and modifies the ondisk dquot directly. Therefore, for example,
 204  * it is an error to call this twice, without purging the cache.
 205  */
 206 STATIC int
 207 xfs_qm_scall_quotaoff(
 208         xfs_mount_t             *mp,
 209         uint                    flags,
 210         boolean_t               force)
 211 {
 212         uint                    dqtype;
 213         unsigned long   s;
 214         int                     error;
 215         uint                    inactivate_flags;
 216         xfs_qoff_logitem_t      *qoffstart;
 217         int                     nculprits;
 218
 219         if (!force && !vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
 220                 return XFS_ERROR(EPERM);
 221         /*
 222          * No file system can have quotas enabled on disk but not in core.
 223          * Note that quota utilities (like quotaoff) _expect_
 224          * errno == EEXIST here.
 225          */
 226         if ((mp->m_qflags & flags) == 0)
 227                 return XFS_ERROR(EEXIST);
 228         error = 0;
 229
 230         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 231
 232         /*
 233          * We don't want to deal with two quotaoffs messing up each other,
 234          * so we're going to serialize it. quotaoff isn't exactly a performance
 235          * critical thing.
 236          * If quotaoff, then we must be dealing with the root filesystem.
 237          */
 238         ASSERT(mp->m_quotainfo);
 239         if (mp->m_quotainfo)
 240                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 241
 242         ASSERT(mp->m_quotainfo);
 243
 244         /*
 245          * If we're just turning off quota enforcement, change mp and go.
 246          */
 247         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
 248                 mp->m_qflags &= ~(flags);
 249
 250                 s = XFS_SB_LOCK(mp);
 251                 mp->m_sb.sb_qflags = mp->m_qflags;
 252                 XFS_SB_UNLOCK(mp, s);
 253                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 254
 255                 /* XXX what to do if error ? Revert back to old vals incore ? */
 256                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
 257                 return (error);
 258         }
 259
 260         dqtype = 0;
 261         inactivate_flags = 0;
 262         /*
 263          * If accounting is off, we must turn enforcement off, clear the
 264          * quota 'CHKD' certificate to make it known that we have to
 265          * do a quotacheck the next time this quota is turned on.
 266          */
 267         if (flags & XFS_UQUOTA_ACCT) {
 268                 dqtype |= XFS_QMOPT_UQUOTA;
 269                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
 270                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
 271         }
 272         if (flags & XFS_GQUOTA_ACCT) {
 273                 dqtype |= XFS_QMOPT_GQUOTA;
 274                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 275                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
 276         } else if (flags & XFS_PQUOTA_ACCT) {
 277                 dqtype |= XFS_QMOPT_PQUOTA;
 278                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 279                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
 280         }
 281
 282         /*
 283          * Nothing to do?  Don't complain. This happens when we're just
 284          * turning off quota enforcement.
 285          */
 286         if ((mp->m_qflags & flags) == 0) {
 287                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 288                 return (0);
 289         }
 290
 291         /*
 292          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
 293          * and synchronously.
 294          */
 295         xfs_qm_log_quotaoff(mp, &qoffstart, flags);
 296
 297         /*
 298          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
 299          * to take care of the race between dqget and quotaoff. We don't take
 300          * any special locks to reset these bits. All processes need to check
 301          * these bits *after* taking inode lock(s) to see if the particular
 302          * quota type is in the process of being turned off. If *ACTIVE, it is
 303          * guaranteed that all dquot structures and all quotainode ptrs will all
 304          * stay valid as long as that inode is kept locked.
 305          *
 306          * There is no turning back after this.
 307          */
 308         mp->m_qflags &= ~inactivate_flags;
 309
 310         /*
 311          * Give back all the dquot reference(s) held by inodes.
 312          * Here we go thru every single incore inode in this file system, and
 313          * do a dqrele on the i_udquot/i_gdquot that it may have.
 314          * Essentially, as long as somebody has an inode locked, this guarantees
 315          * that quotas will not be turned off. This is handy because in a
 316          * transaction once we lock the inode(s) and check for quotaon, we can
 317          * depend on the quota inodes (and other things) being valid as long as
 318          * we keep the lock(s).
 319          */
 320         xfs_qm_dqrele_all_inodes(mp, flags);
 321
 322         /*
 323          * Next we make the changes in the quota flag in the mount struct.
 324          * This isn't protected by a particular lock directly, because we
 325          * don't want to take a mrlock everytime we depend on quotas being on.
 326          */
 327         mp->m_qflags &= ~(flags);
 328
 329         /*
 330          * Go through all the dquots of this file system and purge them,
 331          * according to what was turned off. We may not be able to get rid
 332          * of all dquots, because dquots can have temporary references that
 333          * are not attached to inodes. eg. xfs_setattr, xfs_create.
 334          * So, if we couldn't purge all the dquots from the filesystem,
 335          * we can't get rid of the incore data structures.
 336          */
 337         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
 338                 delay(10 * nculprits);
 339
 340         /*
 341          * Transactions that had started before ACTIVE state bit was cleared
 342          * could have logged many dquots, so they'd have higher LSNs than
 343          * the first QUOTAOFF log record does. If we happen to crash when
 344          * the tail of the log has gone past the QUOTAOFF record, but
 345          * before the last dquot modification, those dquots __will__
 346          * recover, and that's not good.
 347          *
 348          * So, we have QUOTAOFF start and end logitems; the start
 349          * logitem won't get overwritten until the end logitem appears...
 350          */
 351         xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
 352
 353         /*
 354          * If quotas is completely disabled, close shop.
 355          */
 356         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
 357             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
 358                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 359                 xfs_qm_destroy_quotainfo(mp);
 360                 return (0);
 361         }
 362
 363         /*
 364          * Release our quotainode references, and vn_purge them,
 365          * if we don't need them anymore.
 366          */
 367         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
 368                 XFS_PURGE_INODE(XFS_QI_UQIP(mp));
 369                 XFS_QI_UQIP(mp) = NULL;
 370         }
 371         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
 372                 XFS_PURGE_INODE(XFS_QI_GQIP(mp));
 373                 XFS_QI_GQIP(mp) = NULL;
 374         }
 375         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 376
 377         return (error);
 378 }
 379
 380 STATIC int
 381 xfs_qm_scall_trunc_qfiles(
 382         xfs_mount_t     *mp,
 383         uint            flags)
 384 {
 385         int             error;
 386         xfs_inode_t     *qip;
 387
 388         if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
 389                 return XFS_ERROR(EPERM);
 390         error = 0;
 391         if (!XFS_SB_VERSION_HASQUOTA(&mp->m_sb) || flags == 0) {
 392                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
 393                 return XFS_ERROR(EINVAL);
 394         }
 395
 396         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
 397                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
 398                 if (! error) {
 399                         (void) xfs_truncate_file(mp, qip);
 400                         VN_RELE(XFS_ITOV(qip));
 401                 }
 402         }
 403
 404         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
 405             mp->m_sb.sb_gquotino != NULLFSINO) {
 406                 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
 407                 if (! error) {
 408                         (void) xfs_truncate_file(mp, qip);
 409                         VN_RELE(XFS_ITOV(qip));
 410                 }
 411         }
 412
 413         return (error);
 414 }
 415
 416
 417 /*
 418  * Switch on (a given) quota enforcement for a filesystem.  This takes
 419  * effect immediately.
 420  * (Switching on quota accounting must be done at mount time.)
 421  */
 422 STATIC int
 423 xfs_qm_scall_quotaon(
 424         xfs_mount_t     *mp,
 425         uint            flags)
 426 {
 427         int             error;
 428         unsigned long   s;
 429         uint            qf;
 430         uint            accflags;
 431         __int64_t       sbflags;
 432
 433         if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
 434                 return XFS_ERROR(EPERM);
 435
 436         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 437         /*
 438          * Switching on quota accounting must be done at mount time.
 439          */
 440         accflags = flags & XFS_ALL_QUOTA_ACCT;
 441         flags &= ~(XFS_ALL_QUOTA_ACCT);
 442
 443         sbflags = 0;
 444
 445         if (flags == 0) {
 446                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
 447                 return XFS_ERROR(EINVAL);
 448         }
 449
 450         /* No fs can turn on quotas with a delayed effect */
 451         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 452
 453         /*
 454          * Can't enforce without accounting. We check the superblock
 455          * qflags here instead of m_qflags because rootfs can have
 456          * quota acct on ondisk without m_qflags' knowing.
 457          */
 458         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 459             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 460             (flags & XFS_UQUOTA_ENFD))
 461             ||
 462             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 463             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 464             (flags & XFS_OQUOTA_ENFD))
 465             ||
 466             ((flags & XFS_GQUOTA_ACCT) == 0 &&
 467             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 468             (flags & XFS_OQUOTA_ENFD))) {
 469                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 470                         flags, mp->m_sb.sb_qflags);
 471                 return XFS_ERROR(EINVAL);
 472         }
 473         /*
 474          * If everything's upto-date incore, then don't waste time.
 475          */
 476         if ((mp->m_qflags & flags) == flags)
 477                 return XFS_ERROR(EEXIST);
 478
 479         /*
 480          * Change sb_qflags on disk but not incore mp->qflags
 481          * if this is the root filesystem.
 482          */
 483         s = XFS_SB_LOCK(mp);
 484         qf = mp->m_sb.sb_qflags;
 485         mp->m_sb.sb_qflags = qf | flags;
 486         XFS_SB_UNLOCK(mp, s);
 487
 488         /*
 489          * There's nothing to change if it's the same.
 490          */
 491         if ((qf & flags) == flags && sbflags == 0)
 492                 return XFS_ERROR(EEXIST);
 493         sbflags |= XFS_SB_QFLAGS;
 494
 495         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 496                 return (error);
 497         /*
 498          * If we aren't trying to switch on quota enforcement, we are done.
 499          */
 500         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 501              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 502              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 503              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 504              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 505              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 506             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 507                 return (0);
 508
 509         if (! XFS_IS_QUOTA_RUNNING(mp))
 510                 return XFS_ERROR(ESRCH);
 511
 512         /*
 513          * Switch on quota enforcement in core.
 514          */
 515         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 516         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 517         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 518
 519         return (0);
 520 }
 521
 522
 523 /*
 524  * Return quota status information, such as uquota-off, enforcements, etc.
 525  */
 526 STATIC int
 527 xfs_qm_scall_getqstat(
 528         xfs_mount_t     *mp,
 529         fs_quota_stat_t *out)
 530 {
 531         xfs_inode_t     *uip, *gip;
 532         boolean_t       tempuqip, tempgqip;
 533
 534         uip = gip = NULL;
 535         tempuqip = tempgqip = B_FALSE;
 536         memset(out, 0, sizeof(fs_quota_stat_t));
 537
 538         out->qs_version = FS_QSTAT_VERSION;
 539         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
 540                 out->qs_uquota.qfs_ino = NULLFSINO;
 541                 out->qs_gquota.qfs_ino = NULLFSINO;
 542                 return (0);
 543         }
 544         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 545                                                         (XFS_ALL_QUOTA_ACCT|
 546                                                          XFS_ALL_QUOTA_ENFD));
 547         out->qs_pad = 0;
 548         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 549         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 550
 551         if (mp->m_quotainfo) {
 552                 uip = mp->m_quotainfo->qi_uquotaip;
 553                 gip = mp->m_quotainfo->qi_gquotaip;
 554         }
 555         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 556                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 557                                         0, 0, &uip, 0) == 0)
 558                         tempuqip = B_TRUE;
 559         }
 560         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 561                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 562                                         0, 0, &gip, 0) == 0)
 563                         tempgqip = B_TRUE;
 564         }
 565         if (uip) {
 566                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 567                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 568                 if (tempuqip)
 569                         VN_RELE(XFS_ITOV(uip));
 570         }
 571         if (gip) {
 572                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 573                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 574                 if (tempgqip)
 575                         VN_RELE(XFS_ITOV(gip));
 576         }
 577         if (mp->m_quotainfo) {
 578                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 579                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 580                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 581                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 582                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 583                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 584         }
 585         return (0);
 586 }
 587
 588 /*
 589  * Adjust quota limits, and start/stop timers accordingly.
 590  */
 591 STATIC int
 592 xfs_qm_scall_setqlim(
 593         xfs_mount_t             *mp,
 594         xfs_dqid_t              id,
 595         uint                    type,
 596         fs_disk_quota_t         *newlim)
 597 {
 598         xfs_disk_dquot_t        *ddq;
 599         xfs_dquot_t             *dqp;
 600         xfs_trans_t             *tp;
 601         int                     error;
 602         xfs_qcnt_t              hard, soft;
 603
 604         if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
 605                 return XFS_ERROR(EPERM);
 606
 607         if ((newlim->d_fieldmask &
 608             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 609                 return (0);
 610
 611         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 612         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 613                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 614                 xfs_trans_cancel(tp, 0);
 615                 return (error);
 616         }
 617
 618         /*
 619          * We don't want to race with a quotaoff so take the quotaoff lock.
 620          * (We don't hold an inode lock, so there's nothing else to stop
 621          * a quotaoff from happening). (XXXThis doesn't currently happen
 622          * because we take the vfslock before calling xfs_qm_sysent).
 623          */
 624         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 625
 626         /*
 627          * Get the dquot (locked), and join it to the transaction.
 628          * Allocate the dquot if this doesn't exist.
 629          */
 630         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 631                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 632                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 633                 ASSERT(error != ENOENT);
 634                 return (error);
 635         }
 636         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 637         xfs_trans_dqjoin(tp, dqp);
 638         ddq = &dqp->q_core;
 639
 640         /*
 641          * Make sure that hardlimits are >= soft limits before changing.
 642          */
 643         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 644                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 645                         be64_to_cpu(ddq->d_blk_hardlimit);
 646         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 647                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 648                         be64_to_cpu(ddq->d_blk_softlimit);
 649         if (hard == 0 || hard >= soft) {
 650                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 651                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 652                 if (id == 0) {
 653                         mp->m_quotainfo->qi_bhardlimit = hard;
 654                         mp->m_quotainfo->qi_bsoftlimit = soft;
 655                 }
 656         } else {
 657                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 658         }
 659         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 660                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 661                         be64_to_cpu(ddq->d_rtb_hardlimit);
 662         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 663                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 664                         be64_to_cpu(ddq->d_rtb_softlimit);
 665         if (hard == 0 || hard >= soft) {
 666                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 667                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 668                 if (id == 0) {
 669                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 670                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 671                 }
 672         } else {
 673                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 674         }
 675
 676         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 677                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 678                         be64_to_cpu(ddq->d_ino_hardlimit);
 679         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 680                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 681                         be64_to_cpu(ddq->d_ino_softlimit);
 682         if (hard == 0 || hard >= soft) {
 683                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 684                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 685                 if (id == 0) {
 686                         mp->m_quotainfo->qi_ihardlimit = hard;
 687                         mp->m_quotainfo->qi_isoftlimit = soft;
 688                 }
 689         } else {
 690                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 691         }
 692
 693         /*
 694          * Update warnings counter(s) if requested
 695          */
 696         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 697                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 698         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 699                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 700         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 701                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 702
 703         if (id == 0) {
 704                 /*
 705                  * Timelimits for the super user set the relative time
 706                  * the other users can be over quota for this file system.
 707                  * If it is zero a default is used.  Ditto for the default
 708                  * soft and hard limit values (already done, above), and
 709                  * for warnings.
 710                  */
 711                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 712                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 713                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 714                 }
 715                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 716                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 717                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 718                 }
 719                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 720                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 721                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 722                 }
 723                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 724                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 725                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 726                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 727                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 728                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 729         } else {
 730                 /*
 731                  * If the user is now over quota, start the timelimit.
 732                  * The user will not be 'warned'.
 733                  * Note that we keep the timers ticking, whether enforcement
 734                  * is on or off. We don't really want to bother with iterating
 735                  * over all ondisk dquots and turning the timers on/off.
 736                  */
 737                 xfs_qm_adjust_dqtimers(mp, ddq);
 738         }
 739         dqp->dq_flags |= XFS_DQ_DIRTY;
 740         xfs_trans_log_dquot(tp, dqp);
 741
 742         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 743         xfs_trans_commit(tp, 0, NULL);
 744         xfs_qm_dqprint(dqp);
 745         xfs_qm_dqrele(dqp);
 746         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 747
 748         return (0);
 749 }
 750
 751 STATIC int
 752 xfs_qm_scall_getquota(
 753         xfs_mount_t     *mp,
 754         xfs_dqid_t      id,
 755         uint            type,
 756         fs_disk_quota_t *out)
 757 {
 758         xfs_dquot_t     *dqp;
 759         int             error;
 760
 761         /*
 762          * Try to get the dquot. We don't want it allocated on disk, so
 763          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 764          * exist, we'll get ENOENT back.
 765          */
 766         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 767                 return (error);
 768         }
 769
 770         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 771         /*
 772          * If everything's NULL, this dquot doesn't quite exist as far as
 773          * our utility programs are concerned.
 774          */
 775         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 776                 xfs_qm_dqput(dqp);
 777                 return XFS_ERROR(ENOENT);
 778         }
 779         /* xfs_qm_dqprint(dqp); */
 780         /*
 781          * Convert the disk dquot to the exportable format
 782          */
 783         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 784         xfs_qm_dqput(dqp);
 785         return (error ? XFS_ERROR(EFAULT) : 0);
 786 }
 787
 788
 789 STATIC int
 790 xfs_qm_log_quotaoff_end(
 791         xfs_mount_t             *mp,
 792         xfs_qoff_logitem_t      *startqoff,
 793         uint                    flags)
 794 {
 795         xfs_trans_t             *tp;
 796         int                     error;
 797         xfs_qoff_logitem_t      *qoffi;
 798
 799         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 800
 801         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 802                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 803                 xfs_trans_cancel(tp, 0);
 804                 return (error);
 805         }
 806
 807         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 808                                         flags & XFS_ALL_QUOTA_ACCT);
 809         xfs_trans_log_quotaoff_item(tp, qoffi);
 810
 811         /*
 812          * We have to make sure that the transaction is secure on disk before we
 813          * return and actually stop quota accounting. So, make it synchronous.
 814          * We don't care about quotoff's performance.
 815          */
 816         xfs_trans_set_sync(tp);
 817         error = xfs_trans_commit(tp, 0, NULL);
 818         return (error);
 819 }
 820
 821
 822 STATIC int
 823 xfs_qm_log_quotaoff(
 824         xfs_mount_t            *mp,
 825         xfs_qoff_logitem_t     **qoffstartp,
 826         uint                   flags)
 827 {
 828         xfs_trans_t            *tp;
 829         int                     error;
 830         unsigned long   s;
 831         xfs_qoff_logitem_t     *qoffi=NULL;
 832         uint                    oldsbqflag=0;
 833
 834         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 835         if ((error = xfs_trans_reserve(tp, 0,
 836                                       sizeof(xfs_qoff_logitem_t) * 2 +
 837                                       mp->m_sb.sb_sectsize + 128,
 838                                       0,
 839                                       0,
 840                                       XFS_DEFAULT_LOG_COUNT))) {
 841                 goto error0;
 842         }
 843
 844         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 845         xfs_trans_log_quotaoff_item(tp, qoffi);
 846
 847         s = XFS_SB_LOCK(mp);
 848         oldsbqflag = mp->m_sb.sb_qflags;
 849         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 850         XFS_SB_UNLOCK(mp, s);
 851
 852         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 853
 854         /*
 855          * We have to make sure that the transaction is secure on disk before we
 856          * return and actually stop quota accounting. So, make it synchronous.
 857          * We don't care about quotoff's performance.
 858          */
 859         xfs_trans_set_sync(tp);
 860         error = xfs_trans_commit(tp, 0, NULL);
 861
 862 error0:
 863         if (error) {
 864                 xfs_trans_cancel(tp, 0);
 865                 /*
 866                  * No one else is modifying sb_qflags, so this is OK.
 867                  * We still hold the quotaofflock.
 868                  */
 869                 s = XFS_SB_LOCK(mp);
 870                 mp->m_sb.sb_qflags = oldsbqflag;
 871                 XFS_SB_UNLOCK(mp, s);
 872         }
 873         *qoffstartp = qoffi;
 874         return (error);
 875 }
 876
 877
 878 /*
 879  * Translate an internal style on-disk-dquot to the exportable format.
 880  * The main differences are that the counters/limits are all in Basic
 881  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 882  * to be converted to the native endianness.
 883  */
 884 STATIC void
 885 xfs_qm_export_dquot(
 886         xfs_mount_t             *mp,
 887         xfs_disk_dquot_t        *src,
 888         struct fs_disk_quota    *dst)
 889 {
 890         memset(dst, 0, sizeof(*dst));
 891         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 892         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 893         dst->d_id = be32_to_cpu(src->d_id);
 894         dst->d_blk_hardlimit =
 895                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 896         dst->d_blk_softlimit =
 897                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 898         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 899         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 900         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 901         dst->d_icount = be64_to_cpu(src->d_icount);
 902         dst->d_btimer = be32_to_cpu(src->d_btimer);
 903         dst->d_itimer = be32_to_cpu(src->d_itimer);
 904         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 905         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 906         dst->d_rtb_hardlimit =
 907                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 908         dst->d_rtb_softlimit =
 909                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 910         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 911         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 912         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 913
 914         /*
 915          * Internally, we don't reset all the timers when quota enforcement
 916          * gets turned off. No need to confuse the user level code,
 917          * so return zeroes in that case.
 918          */
 919         if (! XFS_IS_QUOTA_ENFORCED(mp)) {
 920                 dst->d_btimer = 0;
 921                 dst->d_itimer = 0;
 922                 dst->d_rtbtimer = 0;
 923         }
 924
 925 #ifdef DEBUG
 926         if (XFS_IS_QUOTA_ENFORCED(mp) && dst->d_id != 0) {
 927                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 928                     (dst->d_blk_softlimit > 0)) {
 929                         ASSERT(dst->d_btimer != 0);
 930                 }
 931                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 932                     (dst->d_ino_softlimit > 0)) {
 933                         ASSERT(dst->d_itimer != 0);
 934                 }
 935         }
 936 #endif
 937 }
 938
 939 STATIC uint
 940 xfs_qm_import_qtype_flags(
 941         uint            uflags)
 942 {
 943         uint            oflags = 0;
 944
 945         /*
 946          * Can't be more than one, or none.
 947          */
 948         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 949                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 950             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 951                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 952             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 953                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 954             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 955                 return (0);
 956
 957         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 958         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 959         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 960         return oflags;
 961 }
 962
 963 STATIC uint
 964 xfs_qm_export_qtype_flags(
 965         uint flags)
 966 {
 967         /*
 968          * Can't be more than one, or none.
 969          */
 970         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 971                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 972         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 973                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 974         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 975                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 976         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 977
 978         return (flags & XFS_DQ_USER) ?
 979                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 980                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 981 }
 982
 983 STATIC uint
 984 xfs_qm_import_flags(
 985         uint uflags)
 986 {
 987         uint flags = 0;
 988
 989         if (uflags & XFS_QUOTA_UDQ_ACCT)
 990                 flags |= XFS_UQUOTA_ACCT;
 991         if (uflags & XFS_QUOTA_PDQ_ACCT)
 992                 flags |= XFS_PQUOTA_ACCT;
 993         if (uflags & XFS_QUOTA_GDQ_ACCT)
 994                 flags |= XFS_GQUOTA_ACCT;
 995         if (uflags & XFS_QUOTA_UDQ_ENFD)
 996                 flags |= XFS_UQUOTA_ENFD;
 997         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 998                 flags |= XFS_OQUOTA_ENFD;
 999         return (flags);
1000 }
1001
1002
1003 STATIC uint
1004 xfs_qm_export_flags(
1005         uint flags)
1006 {
1007         uint uflags;
1008
1009         uflags = 0;
1010         if (flags & XFS_UQUOTA_ACCT)
1011                 uflags |= XFS_QUOTA_UDQ_ACCT;
1012         if (flags & XFS_PQUOTA_ACCT)
1013                 uflags |= XFS_QUOTA_PDQ_ACCT;
1014         if (flags & XFS_GQUOTA_ACCT)
1015                 uflags |= XFS_QUOTA_GDQ_ACCT;
1016         if (flags & XFS_UQUOTA_ENFD)
1017                 uflags |= XFS_QUOTA_UDQ_ENFD;
1018         if (flags & (XFS_OQUOTA_ENFD)) {
1019                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1020                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1021         }
1022         return (uflags);
1023 }
1024
1025
1026 /*
1027  * Go thru all the inodes in the file system, releasing their dquots.
1028  * Note that the mount structure gets modified to indicate that quotas are off
1029  * AFTER this, in the case of quotaoff. This also gets called from
1030  * xfs_rootumount.
1031  */
1032 void
1033 xfs_qm_dqrele_all_inodes(
1034         struct xfs_mount *mp,
1035         uint             flags)
1036 {
1037         xfs_inode_t     *ip, *topino;
1038         uint            ireclaims;
1039         vnode_t         *vp;
1040         boolean_t       vnode_refd;
1041
1042         ASSERT(mp->m_quotainfo);
1043
1044         XFS_MOUNT_ILOCK(mp);
1045 again:
1046         ip = mp->m_inodes;
1047         if (ip == NULL) {
1048                 XFS_MOUNT_IUNLOCK(mp);
1049                 return;
1050         }
1051         do {
1052                 /* Skip markers inserted by xfs_sync */
1053                 if (ip->i_mount == NULL) {
1054                         ip = ip->i_mnext;
1055                         continue;
1056                 }
1057                 /* Root inode, rbmip and rsumip have associated blocks */
1058                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1059                         ASSERT(ip->i_udquot == NULL);
1060                         ASSERT(ip->i_gdquot == NULL);
1061                         ip = ip->i_mnext;
1062                         continue;
1063                 }
1064                 vp = XFS_ITOV_NULL(ip);
1065                 if (!vp) {
1066                         ASSERT(ip->i_udquot == NULL);
1067                         ASSERT(ip->i_gdquot == NULL);
1068                         ip = ip->i_mnext;
1069                         continue;
1070                 }
1071                 vnode_refd = B_FALSE;
1072                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1073                         ireclaims = mp->m_ireclaims;
1074                         topino = mp->m_inodes;
1075                         vp = vn_grab(vp);
1076                         if (!vp)
1077                                 goto again;
1078
1079                         XFS_MOUNT_IUNLOCK(mp);
1080                         /* XXX restart limit ? */
1081                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1082                         vnode_refd = B_TRUE;
1083                 } else {
1084                         ireclaims = mp->m_ireclaims;
1085                         topino = mp->m_inodes;
1086                         XFS_MOUNT_IUNLOCK(mp);
1087                 }
1088
1089                 /*
1090                  * We don't keep the mountlock across the dqrele() call,
1091                  * since it can take a while..
1092                  */
1093                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1094                         xfs_qm_dqrele(ip->i_udquot);
1095                         ip->i_udquot = NULL;
1096                 }
1097                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1098                         xfs_qm_dqrele(ip->i_gdquot);
1099                         ip->i_gdquot = NULL;
1100                 }
1101                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1102                 /*
1103                  * Wait until we've dropped the ilock and mountlock to
1104                  * do the vn_rele. Or be condemned to an eternity in the
1105                  * inactive code in hell.
1106                  */
1107                 if (vnode_refd)
1108                         VN_RELE(vp);
1109                 XFS_MOUNT_ILOCK(mp);
1110                 /*
1111                  * If an inode was inserted or removed, we gotta
1112                  * start over again.
1113                  */
1114                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1115                         /* XXX use a sentinel */
1116                         goto again;
1117                 }
1118                 ip = ip->i_mnext;
1119         } while (ip != mp->m_inodes);
1120
1121         XFS_MOUNT_IUNLOCK(mp);
1122 }
1123
1124 /*------------------------------------------------------------------------*/
1125 #ifdef DEBUG
1126 /*
1127  * This contains all the test functions for XFS disk quotas.
1128  * Currently it does a quota accounting check. ie. it walks through
1129  * all inodes in the file system, calculating the dquot accounting fields,
1130  * and prints out any inconsistencies.
1131  */
1132 xfs_dqhash_t *qmtest_udqtab;
1133 xfs_dqhash_t *qmtest_gdqtab;
1134 int           qmtest_hashmask;
1135 int           qmtest_nfails;
1136 mutex_t       qcheck_lock;
1137
1138 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1139                                  (__psunsigned_t)(id)) & \
1140                                 (qmtest_hashmask - 1))
1141
1142 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1143                                      (qmtest_udqtab + \
1144                                       DQTEST_HASHVAL(mp, id)) : \
1145                                      (qmtest_gdqtab + \
1146                                       DQTEST_HASHVAL(mp, id)))
1147
1148 #define DQTEST_LIST_PRINT(l, NXT, title) \
1149 { \
1150           xfs_dqtest_t  *dqp; int i = 0;\
1151           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1152           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1153                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1154                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1155                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1156                          dqp->d_bcount, dqp->d_icount); } \
1157 }
1158
1159 typedef struct dqtest {
1160         xfs_dqmarker_t  q_lists;
1161         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1162         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1163         xfs_dqid_t      d_id;           /* user id or group id */
1164         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1165         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1166 } xfs_dqtest_t;
1167
1168 STATIC void
1169 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1170 {
1171         xfs_dquot_t *d;
1172         if (((d) = (h)->qh_next))
1173                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1174         (dqp)->HL_NEXT = d;
1175         (dqp)->HL_PREVP = &((h)->qh_next);
1176         (h)->qh_next = (xfs_dquot_t *)dqp;
1177         (h)->qh_version++;
1178         (h)->qh_nelems++;
1179 }
1180 STATIC void
1181 xfs_qm_dqtest_print(
1182         xfs_dqtest_t    *d)
1183 {
1184         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1185         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1186         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1187         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1188                 d->d_bcount, (int)d->d_bcount);
1189         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1190                 d->d_icount, (int)d->d_icount);
1191         cmn_err(CE_DEBUG, "---------------------------");
1192 }
1193
1194 STATIC void
1195 xfs_qm_dqtest_failed(
1196         xfs_dqtest_t    *d,
1197         xfs_dquot_t     *dqp,
1198         char            *reason,
1199         xfs_qcnt_t      a,
1200         xfs_qcnt_t      b,
1201         int             error)
1202 {
1203         qmtest_nfails++;
1204         if (error)
1205                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1206                        d->d_id, error, reason);
1207         else
1208                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1209                        d->d_id, reason, (int)a, (int)b);
1210         xfs_qm_dqtest_print(d);
1211         if (dqp)
1212                 xfs_qm_dqprint(dqp);
1213 }
1214
1215 STATIC int
1216 xfs_dqtest_cmp2(
1217         xfs_dqtest_t    *d,
1218         xfs_dquot_t     *dqp)
1219 {
1220         int err = 0;
1221         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1222                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1223                         be64_to_cpu(dqp->q_core.d_icount),
1224                         d->d_icount, 0);
1225                 err++;
1226         }
1227         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1228                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1229                         be64_to_cpu(dqp->q_core.d_bcount),
1230                         d->d_bcount, 0);
1231                 err++;
1232         }
1233         if (dqp->q_core.d_blk_softlimit &&
1234             be64_to_cpu(dqp->q_core.d_bcount) >=
1235             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1236                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1237                         cmn_err(CE_DEBUG,
1238                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1239                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1240                         err++;
1241                 }
1242         }
1243         if (dqp->q_core.d_ino_softlimit &&
1244             be64_to_cpu(dqp->q_core.d_icount) >=
1245             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1246                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1247                         cmn_err(CE_DEBUG,
1248                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1249                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1250                         err++;
1251                 }
1252         }
1253 #ifdef QUOTADEBUG
1254         if (!err) {
1255                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1256                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1257         }
1258 #endif
1259         return (err);
1260 }
1261
1262 STATIC void
1263 xfs_dqtest_cmp(
1264         xfs_dqtest_t    *d)
1265 {
1266         xfs_dquot_t     *dqp;
1267         int             error;
1268
1269         /* xfs_qm_dqtest_print(d); */
1270         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1271                                  &dqp))) {
1272                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1273                 return;
1274         }
1275         xfs_dqtest_cmp2(d, dqp);
1276         xfs_qm_dqput(dqp);
1277 }
1278
1279 STATIC int
1280 xfs_qm_internalqcheck_dqget(
1281         xfs_mount_t     *mp,
1282         xfs_dqid_t      id,
1283         uint            type,
1284         xfs_dqtest_t    **O_dq)
1285 {
1286         xfs_dqtest_t    *d;
1287         xfs_dqhash_t    *h;
1288
1289         h = DQTEST_HASH(mp, id, type);
1290         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1291              d = (xfs_dqtest_t *) d->HL_NEXT) {
1292                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1293                 if (d->d_id == id && mp == d->q_mount) {
1294                         *O_dq = d;
1295                         return (0);
1296                 }
1297         }
1298         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1299         d->dq_flags = type;
1300         d->d_id = id;
1301         d->q_mount = mp;
1302         d->q_hash = h;
1303         xfs_qm_hashinsert(h, d);
1304         *O_dq = d;
1305         return (0);
1306 }
1307
1308 STATIC void
1309 xfs_qm_internalqcheck_get_dquots(
1310         xfs_mount_t     *mp,
1311         xfs_dqid_t      uid,
1312         xfs_dqid_t      projid,
1313         xfs_dqid_t      gid,
1314         xfs_dqtest_t    **ud,
1315         xfs_dqtest_t    **gd)
1316 {
1317         if (XFS_IS_UQUOTA_ON(mp))
1318                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1319         if (XFS_IS_GQUOTA_ON(mp))
1320                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1321         else if (XFS_IS_PQUOTA_ON(mp))
1322                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1323 }
1324
1325
1326 STATIC void
1327 xfs_qm_internalqcheck_dqadjust(
1328         xfs_inode_t             *ip,
1329         xfs_dqtest_t            *d)
1330 {
1331         d->d_icount++;
1332         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1333 }
1334
1335 STATIC int
1336 xfs_qm_internalqcheck_adjust(
1337         xfs_mount_t     *mp,            /* mount point for filesystem */
1338         xfs_ino_t       ino,            /* inode number to get data for */
1339         void            __user *buffer, /* not used */
1340         int             ubsize,         /* not used */
1341         void            *private_data,  /* not used */
1342         xfs_daddr_t     bno,            /* starting block of inode cluster */
1343         int             *ubused,        /* not used */
1344         void            *dip,           /* not used */
1345         int             *res)           /* bulkstat result code */
1346 {
1347         xfs_inode_t             *ip;
1348         xfs_dqtest_t            *ud, *gd;
1349         uint                    lock_flags;
1350         boolean_t               ipreleased;
1351         int                     error;
1352
1353         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1354
1355         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1356                 *res = BULKSTAT_RV_NOTHING;
1357                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1358                         (unsigned long long) ino,
1359                         (unsigned long long) mp->m_sb.sb_uquotino,
1360                         (unsigned long long) mp->m_sb.sb_gquotino);
1361                 return XFS_ERROR(EINVAL);
1362         }
1363         ipreleased = B_FALSE;
1364  again:
1365         lock_flags = XFS_ILOCK_SHARED;
1366         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1367                 *res = BULKSTAT_RV_NOTHING;
1368                 return (error);
1369         }
1370
1371         if (ip->i_d.di_mode == 0) {
1372                 xfs_iput_new(ip, lock_flags);
1373                 *res = BULKSTAT_RV_NOTHING;
1374                 return XFS_ERROR(ENOENT);
1375         }
1376
1377         /*
1378          * This inode can have blocks after eof which can get released
1379          * when we send it to inactive. Since we don't check the dquot
1380          * until the after all our calculations are done, we must get rid
1381          * of those now.
1382          */
1383         if (! ipreleased) {
1384                 xfs_iput(ip, lock_flags);
1385                 ipreleased = B_TRUE;
1386                 goto again;
1387         }
1388         xfs_qm_internalqcheck_get_dquots(mp,
1389                                         (xfs_dqid_t) ip->i_d.di_uid,
1390                                         (xfs_dqid_t) ip->i_d.di_projid,
1391                                         (xfs_dqid_t) ip->i_d.di_gid,
1392                                         &ud, &gd);
1393         if (XFS_IS_UQUOTA_ON(mp)) {
1394                 ASSERT(ud);
1395                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1396         }
1397         if (XFS_IS_OQUOTA_ON(mp)) {
1398                 ASSERT(gd);
1399                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1400         }
1401         xfs_iput(ip, lock_flags);
1402         *res = BULKSTAT_RV_DIDONE;
1403         return (0);
1404 }
1405
1406
1407 /* PRIVATE, debugging */
1408 int
1409 xfs_qm_internalqcheck(
1410         xfs_mount_t     *mp)
1411 {
1412         xfs_ino_t       lastino;
1413         int             done, count;
1414         int             i;
1415         xfs_dqtest_t    *d, *e;
1416         xfs_dqhash_t    *h1;
1417         int             error;
1418
1419         lastino = 0;
1420         qmtest_hashmask = 32;
1421         count = 5;
1422         done = 0;
1423         qmtest_nfails = 0;
1424
1425         if (! XFS_IS_QUOTA_ON(mp))
1426                 return XFS_ERROR(ESRCH);
1427
1428         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1429         XFS_bflush(mp->m_ddev_targp);
1430         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1431         XFS_bflush(mp->m_ddev_targp);
1432
1433         mutex_lock(&qcheck_lock);
1434         /* There should be absolutely no quota activity while this
1435            is going on. */
1436         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1437                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1438         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1439                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1440         do {
1441                 /*
1442                  * Iterate thru all the inodes in the file system,
1443                  * adjusting the corresponding dquot counters
1444                  */
1445                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1446                                  xfs_qm_internalqcheck_adjust, NULL,
1447                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1448                         break;
1449                 }
1450         } while (! done);
1451         if (error) {
1452                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1453         }
1454         cmn_err(CE_DEBUG, "Checking results against system dquots");
1455         for (i = 0; i < qmtest_hashmask; i++) {
1456                 h1 = &qmtest_udqtab[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                 h1 = &qmtest_gdqtab[i];
1464                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1465                         xfs_dqtest_cmp(d);
1466                         e = (xfs_dqtest_t *) d->HL_NEXT;
1467                         kmem_free(d, sizeof(xfs_dqtest_t));
1468                         d = e;
1469                 }
1470         }
1471
1472         if (qmtest_nfails) {
1473                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1474                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1475         } else {
1476                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1477         }
1478         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1479         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1480         mutex_unlock(&qcheck_lock);
1481         return (qmtest_nfails);
1482 }
1483
1484 #endif /* DEBUG */