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_OQUOTA_ENFD))
 460             ||
 461             ((flags & XFS_GQUOTA_ACCT) == 0 &&
 462             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 463             (flags & XFS_OQUOTA_ENFD))) {
 464                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 465                         flags, mp->m_sb.sb_qflags);
 466                 return XFS_ERROR(EINVAL);
 467         }
 468         /*
 469          * If everything's upto-date incore, then don't waste time.
 470          */
 471         if ((mp->m_qflags & flags) == flags)
 472                 return XFS_ERROR(EEXIST);
 473
 474         /*
 475          * Change sb_qflags on disk but not incore mp->qflags
 476          * if this is the root filesystem.
 477          */
 478         s = XFS_SB_LOCK(mp);
 479         qf = mp->m_sb.sb_qflags;
 480         mp->m_sb.sb_qflags = qf | flags;
 481         XFS_SB_UNLOCK(mp, s);
 482
 483         /*
 484          * There's nothing to change if it's the same.
 485          */
 486         if ((qf & flags) == flags && sbflags == 0)
 487                 return XFS_ERROR(EEXIST);
 488         sbflags |= XFS_SB_QFLAGS;
 489
 490         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 491                 return (error);
 492         /*
 493          * If we aren't trying to switch on quota enforcement, we are done.
 494          */
 495         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 496              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 497              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 498              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 499              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 500              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 501             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 502                 return (0);
 503
 504         if (! XFS_IS_QUOTA_RUNNING(mp))
 505                 return XFS_ERROR(ESRCH);
 506
 507         /*
 508          * Switch on quota enforcement in core.
 509          */
 510         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 511         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 512         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 513
 514         return (0);
 515 }
 516
 517
 518 /*
 519  * Return quota status information, such as uquota-off, enforcements, etc.
 520  */
 521 STATIC int
 522 xfs_qm_scall_getqstat(
 523         xfs_mount_t     *mp,
 524         fs_quota_stat_t *out)
 525 {
 526         xfs_inode_t     *uip, *gip;
 527         boolean_t       tempuqip, tempgqip;
 528
 529         uip = gip = NULL;
 530         tempuqip = tempgqip = B_FALSE;
 531         memset(out, 0, sizeof(fs_quota_stat_t));
 532
 533         out->qs_version = FS_QSTAT_VERSION;
 534         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
 535                 out->qs_uquota.qfs_ino = NULLFSINO;
 536                 out->qs_gquota.qfs_ino = NULLFSINO;
 537                 return (0);
 538         }
 539         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 540                                                         (XFS_ALL_QUOTA_ACCT|
 541                                                          XFS_ALL_QUOTA_ENFD));
 542         out->qs_pad = 0;
 543         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 544         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 545
 546         if (mp->m_quotainfo) {
 547                 uip = mp->m_quotainfo->qi_uquotaip;
 548                 gip = mp->m_quotainfo->qi_gquotaip;
 549         }
 550         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 551                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 552                                         0, 0, &uip, 0) == 0)
 553                         tempuqip = B_TRUE;
 554         }
 555         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 556                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 557                                         0, 0, &gip, 0) == 0)
 558                         tempgqip = B_TRUE;
 559         }
 560         if (uip) {
 561                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 562                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 563                 if (tempuqip)
 564                         VN_RELE(XFS_ITOV(uip));
 565         }
 566         if (gip) {
 567                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 568                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 569                 if (tempgqip)
 570                         VN_RELE(XFS_ITOV(gip));
 571         }
 572         if (mp->m_quotainfo) {
 573                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 574                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 575                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 576                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 577                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 578                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 579         }
 580         return (0);
 581 }
 582
 583 /*
 584  * Adjust quota limits, and start/stop timers accordingly.
 585  */
 586 STATIC int
 587 xfs_qm_scall_setqlim(
 588         xfs_mount_t             *mp,
 589         xfs_dqid_t              id,
 590         uint                    type,
 591         fs_disk_quota_t         *newlim)
 592 {
 593         xfs_disk_dquot_t        *ddq;
 594         xfs_dquot_t             *dqp;
 595         xfs_trans_t             *tp;
 596         int                     error;
 597         xfs_qcnt_t              hard, soft;
 598
 599         if (!capable(CAP_SYS_ADMIN))
 600                 return XFS_ERROR(EPERM);
 601
 602         if ((newlim->d_fieldmask &
 603             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 604                 return (0);
 605
 606         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 607         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 608                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 609                 xfs_trans_cancel(tp, 0);
 610                 return (error);
 611         }
 612
 613         /*
 614          * We don't want to race with a quotaoff so take the quotaoff lock.
 615          * (We don't hold an inode lock, so there's nothing else to stop
 616          * a quotaoff from happening). (XXXThis doesn't currently happen
 617          * because we take the vfslock before calling xfs_qm_sysent).
 618          */
 619         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 620
 621         /*
 622          * Get the dquot (locked), and join it to the transaction.
 623          * Allocate the dquot if this doesn't exist.
 624          */
 625         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 626                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 627                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 628                 ASSERT(error != ENOENT);
 629                 return (error);
 630         }
 631         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 632         xfs_trans_dqjoin(tp, dqp);
 633         ddq = &dqp->q_core;
 634
 635         /*
 636          * Make sure that hardlimits are >= soft limits before changing.
 637          */
 638         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 639                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 640                         be64_to_cpu(ddq->d_blk_hardlimit);
 641         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 642                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 643                         be64_to_cpu(ddq->d_blk_softlimit);
 644         if (hard == 0 || hard >= soft) {
 645                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 646                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 647                 if (id == 0) {
 648                         mp->m_quotainfo->qi_bhardlimit = hard;
 649                         mp->m_quotainfo->qi_bsoftlimit = soft;
 650                 }
 651         } else {
 652                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 653         }
 654         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 655                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 656                         be64_to_cpu(ddq->d_rtb_hardlimit);
 657         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 658                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 659                         be64_to_cpu(ddq->d_rtb_softlimit);
 660         if (hard == 0 || hard >= soft) {
 661                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 662                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 663                 if (id == 0) {
 664                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 665                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 666                 }
 667         } else {
 668                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 669         }
 670
 671         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 672                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 673                         be64_to_cpu(ddq->d_ino_hardlimit);
 674         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 675                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 676                         be64_to_cpu(ddq->d_ino_softlimit);
 677         if (hard == 0 || hard >= soft) {
 678                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 679                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 680                 if (id == 0) {
 681                         mp->m_quotainfo->qi_ihardlimit = hard;
 682                         mp->m_quotainfo->qi_isoftlimit = soft;
 683                 }
 684         } else {
 685                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 686         }
 687
 688         /*
 689          * Update warnings counter(s) if requested
 690          */
 691         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 692                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 693         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 694                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 695         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 696                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 697
 698         if (id == 0) {
 699                 /*
 700                  * Timelimits for the super user set the relative time
 701                  * the other users can be over quota for this file system.
 702                  * If it is zero a default is used.  Ditto for the default
 703                  * soft and hard limit values (already done, above), and
 704                  * for warnings.
 705                  */
 706                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 707                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 708                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 709                 }
 710                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 711                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 712                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 713                 }
 714                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 715                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 716                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 717                 }
 718                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 719                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 720                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 721                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 722                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 723                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 724         } else {
 725                 /*
 726                  * If the user is now over quota, start the timelimit.
 727                  * The user will not be 'warned'.
 728                  * Note that we keep the timers ticking, whether enforcement
 729                  * is on or off. We don't really want to bother with iterating
 730                  * over all ondisk dquots and turning the timers on/off.
 731                  */
 732                 xfs_qm_adjust_dqtimers(mp, ddq);
 733         }
 734         dqp->dq_flags |= XFS_DQ_DIRTY;
 735         xfs_trans_log_dquot(tp, dqp);
 736
 737         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 738         xfs_trans_commit(tp, 0, NULL);
 739         xfs_qm_dqprint(dqp);
 740         xfs_qm_dqrele(dqp);
 741         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 742
 743         return (0);
 744 }
 745
 746 STATIC int
 747 xfs_qm_scall_getquota(
 748         xfs_mount_t     *mp,
 749         xfs_dqid_t      id,
 750         uint            type,
 751         fs_disk_quota_t *out)
 752 {
 753         xfs_dquot_t     *dqp;
 754         int             error;
 755
 756         /*
 757          * Try to get the dquot. We don't want it allocated on disk, so
 758          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 759          * exist, we'll get ENOENT back.
 760          */
 761         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 762                 return (error);
 763         }
 764
 765         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 766         /*
 767          * If everything's NULL, this dquot doesn't quite exist as far as
 768          * our utility programs are concerned.
 769          */
 770         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 771                 xfs_qm_dqput(dqp);
 772                 return XFS_ERROR(ENOENT);
 773         }
 774         /* xfs_qm_dqprint(dqp); */
 775         /*
 776          * Convert the disk dquot to the exportable format
 777          */
 778         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 779         xfs_qm_dqput(dqp);
 780         return (error ? XFS_ERROR(EFAULT) : 0);
 781 }
 782
 783
 784 STATIC int
 785 xfs_qm_log_quotaoff_end(
 786         xfs_mount_t             *mp,
 787         xfs_qoff_logitem_t      *startqoff,
 788         uint                    flags)
 789 {
 790         xfs_trans_t             *tp;
 791         int                     error;
 792         xfs_qoff_logitem_t      *qoffi;
 793
 794         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 795
 796         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 797                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 798                 xfs_trans_cancel(tp, 0);
 799                 return (error);
 800         }
 801
 802         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 803                                         flags & XFS_ALL_QUOTA_ACCT);
 804         xfs_trans_log_quotaoff_item(tp, qoffi);
 805
 806         /*
 807          * We have to make sure that the transaction is secure on disk before we
 808          * return and actually stop quota accounting. So, make it synchronous.
 809          * We don't care about quotoff's performance.
 810          */
 811         xfs_trans_set_sync(tp);
 812         error = xfs_trans_commit(tp, 0, NULL);
 813         return (error);
 814 }
 815
 816
 817 STATIC int
 818 xfs_qm_log_quotaoff(
 819         xfs_mount_t            *mp,
 820         xfs_qoff_logitem_t     **qoffstartp,
 821         uint                   flags)
 822 {
 823         xfs_trans_t            *tp;
 824         int                     error;
 825         unsigned long   s;
 826         xfs_qoff_logitem_t     *qoffi=NULL;
 827         uint                    oldsbqflag=0;
 828
 829         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 830         if ((error = xfs_trans_reserve(tp, 0,
 831                                       sizeof(xfs_qoff_logitem_t) * 2 +
 832                                       mp->m_sb.sb_sectsize + 128,
 833                                       0,
 834                                       0,
 835                                       XFS_DEFAULT_LOG_COUNT))) {
 836                 goto error0;
 837         }
 838
 839         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 840         xfs_trans_log_quotaoff_item(tp, qoffi);
 841
 842         s = XFS_SB_LOCK(mp);
 843         oldsbqflag = mp->m_sb.sb_qflags;
 844         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 845         XFS_SB_UNLOCK(mp, s);
 846
 847         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 848
 849         /*
 850          * We have to make sure that the transaction is secure on disk before we
 851          * return and actually stop quota accounting. So, make it synchronous.
 852          * We don't care about quotoff's performance.
 853          */
 854         xfs_trans_set_sync(tp);
 855         error = xfs_trans_commit(tp, 0, NULL);
 856
 857 error0:
 858         if (error) {
 859                 xfs_trans_cancel(tp, 0);
 860                 /*
 861                  * No one else is modifying sb_qflags, so this is OK.
 862                  * We still hold the quotaofflock.
 863                  */
 864                 s = XFS_SB_LOCK(mp);
 865                 mp->m_sb.sb_qflags = oldsbqflag;
 866                 XFS_SB_UNLOCK(mp, s);
 867         }
 868         *qoffstartp = qoffi;
 869         return (error);
 870 }
 871
 872
 873 /*
 874  * Translate an internal style on-disk-dquot to the exportable format.
 875  * The main differences are that the counters/limits are all in Basic
 876  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 877  * to be converted to the native endianness.
 878  */
 879 STATIC void
 880 xfs_qm_export_dquot(
 881         xfs_mount_t             *mp,
 882         xfs_disk_dquot_t        *src,
 883         struct fs_disk_quota    *dst)
 884 {
 885         memset(dst, 0, sizeof(*dst));
 886         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 887         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 888         dst->d_id = be32_to_cpu(src->d_id);
 889         dst->d_blk_hardlimit =
 890                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 891         dst->d_blk_softlimit =
 892                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 893         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 894         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 895         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 896         dst->d_icount = be64_to_cpu(src->d_icount);
 897         dst->d_btimer = be32_to_cpu(src->d_btimer);
 898         dst->d_itimer = be32_to_cpu(src->d_itimer);
 899         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 900         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 901         dst->d_rtb_hardlimit =
 902                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 903         dst->d_rtb_softlimit =
 904                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 905         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 906         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 907         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 908
 909         /*
 910          * Internally, we don't reset all the timers when quota enforcement
 911          * gets turned off. No need to confuse the user level code,
 912          * so return zeroes in that case.
 913          */
 914         if (! XFS_IS_QUOTA_ENFORCED(mp)) {
 915                 dst->d_btimer = 0;
 916                 dst->d_itimer = 0;
 917                 dst->d_rtbtimer = 0;
 918         }
 919
 920 #ifdef DEBUG
 921         if (XFS_IS_QUOTA_ENFORCED(mp) && dst->d_id != 0) {
 922                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 923                     (dst->d_blk_softlimit > 0)) {
 924                         ASSERT(dst->d_btimer != 0);
 925                 }
 926                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 927                     (dst->d_ino_softlimit > 0)) {
 928                         ASSERT(dst->d_itimer != 0);
 929                 }
 930         }
 931 #endif
 932 }
 933
 934 STATIC uint
 935 xfs_qm_import_qtype_flags(
 936         uint            uflags)
 937 {
 938         uint            oflags = 0;
 939
 940         /*
 941          * Can't be more than one, or none.
 942          */
 943         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 944                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 945             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 946                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 947             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 948                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 949             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 950                 return (0);
 951
 952         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 953         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 954         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 955         return oflags;
 956 }
 957
 958 STATIC uint
 959 xfs_qm_export_qtype_flags(
 960         uint flags)
 961 {
 962         /*
 963          * Can't be more than one, or none.
 964          */
 965         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 966                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 967         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 968                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 969         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 970                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 971         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 972
 973         return (flags & XFS_DQ_USER) ?
 974                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 975                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 976 }
 977
 978 STATIC uint
 979 xfs_qm_import_flags(
 980         uint uflags)
 981 {
 982         uint flags = 0;
 983
 984         if (uflags & XFS_QUOTA_UDQ_ACCT)
 985                 flags |= XFS_UQUOTA_ACCT;
 986         if (uflags & XFS_QUOTA_PDQ_ACCT)
 987                 flags |= XFS_PQUOTA_ACCT;
 988         if (uflags & XFS_QUOTA_GDQ_ACCT)
 989                 flags |= XFS_GQUOTA_ACCT;
 990         if (uflags & XFS_QUOTA_UDQ_ENFD)
 991                 flags |= XFS_UQUOTA_ENFD;
 992         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 993                 flags |= XFS_OQUOTA_ENFD;
 994         return (flags);
 995 }
 996
 997
 998 STATIC uint
 999 xfs_qm_export_flags(
1000         uint flags)
1001 {
1002         uint uflags;
1003
1004         uflags = 0;
1005         if (flags & XFS_UQUOTA_ACCT)
1006                 uflags |= XFS_QUOTA_UDQ_ACCT;
1007         if (flags & XFS_PQUOTA_ACCT)
1008                 uflags |= XFS_QUOTA_PDQ_ACCT;
1009         if (flags & XFS_GQUOTA_ACCT)
1010                 uflags |= XFS_QUOTA_GDQ_ACCT;
1011         if (flags & XFS_UQUOTA_ENFD)
1012                 uflags |= XFS_QUOTA_UDQ_ENFD;
1013         if (flags & (XFS_OQUOTA_ENFD)) {
1014                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1015                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1016         }
1017         return (uflags);
1018 }
1019
1020
1021 /*
1022  * Go thru all the inodes in the file system, releasing their dquots.
1023  * Note that the mount structure gets modified to indicate that quotas are off
1024  * AFTER this, in the case of quotaoff. This also gets called from
1025  * xfs_rootumount.
1026  */
1027 void
1028 xfs_qm_dqrele_all_inodes(
1029         struct xfs_mount *mp,
1030         uint             flags)
1031 {
1032         xfs_inode_t     *ip, *topino;
1033         uint            ireclaims;
1034         bhv_vnode_t     *vp;
1035         boolean_t       vnode_refd;
1036
1037         ASSERT(mp->m_quotainfo);
1038
1039         XFS_MOUNT_ILOCK(mp);
1040 again:
1041         ip = mp->m_inodes;
1042         if (ip == NULL) {
1043                 XFS_MOUNT_IUNLOCK(mp);
1044                 return;
1045         }
1046         do {
1047                 /* Skip markers inserted by xfs_sync */
1048                 if (ip->i_mount == NULL) {
1049                         ip = ip->i_mnext;
1050                         continue;
1051                 }
1052                 /* Root inode, rbmip and rsumip have associated blocks */
1053                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1054                         ASSERT(ip->i_udquot == NULL);
1055                         ASSERT(ip->i_gdquot == NULL);
1056                         ip = ip->i_mnext;
1057                         continue;
1058                 }
1059                 vp = XFS_ITOV_NULL(ip);
1060                 if (!vp) {
1061                         ASSERT(ip->i_udquot == NULL);
1062                         ASSERT(ip->i_gdquot == NULL);
1063                         ip = ip->i_mnext;
1064                         continue;
1065                 }
1066                 vnode_refd = B_FALSE;
1067                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1068                         ireclaims = mp->m_ireclaims;
1069                         topino = mp->m_inodes;
1070                         vp = vn_grab(vp);
1071                         if (!vp)
1072                                 goto again;
1073
1074                         XFS_MOUNT_IUNLOCK(mp);
1075                         /* XXX restart limit ? */
1076                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1077                         vnode_refd = B_TRUE;
1078                 } else {
1079                         ireclaims = mp->m_ireclaims;
1080                         topino = mp->m_inodes;
1081                         XFS_MOUNT_IUNLOCK(mp);
1082                 }
1083
1084                 /*
1085                  * We don't keep the mountlock across the dqrele() call,
1086                  * since it can take a while..
1087                  */
1088                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1089                         xfs_qm_dqrele(ip->i_udquot);
1090                         ip->i_udquot = NULL;
1091                 }
1092                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1093                         xfs_qm_dqrele(ip->i_gdquot);
1094                         ip->i_gdquot = NULL;
1095                 }
1096                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1097                 /*
1098                  * Wait until we've dropped the ilock and mountlock to
1099                  * do the vn_rele. Or be condemned to an eternity in the
1100                  * inactive code in hell.
1101                  */
1102                 if (vnode_refd)
1103                         VN_RELE(vp);
1104                 XFS_MOUNT_ILOCK(mp);
1105                 /*
1106                  * If an inode was inserted or removed, we gotta
1107                  * start over again.
1108                  */
1109                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1110                         /* XXX use a sentinel */
1111                         goto again;
1112                 }
1113                 ip = ip->i_mnext;
1114         } while (ip != mp->m_inodes);
1115
1116         XFS_MOUNT_IUNLOCK(mp);
1117 }
1118
1119 /*------------------------------------------------------------------------*/
1120 #ifdef DEBUG
1121 /*
1122  * This contains all the test functions for XFS disk quotas.
1123  * Currently it does a quota accounting check. ie. it walks through
1124  * all inodes in the file system, calculating the dquot accounting fields,
1125  * and prints out any inconsistencies.
1126  */
1127 xfs_dqhash_t *qmtest_udqtab;
1128 xfs_dqhash_t *qmtest_gdqtab;
1129 int           qmtest_hashmask;
1130 int           qmtest_nfails;
1131 mutex_t       qcheck_lock;
1132
1133 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1134                                  (__psunsigned_t)(id)) & \
1135                                 (qmtest_hashmask - 1))
1136
1137 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1138                                      (qmtest_udqtab + \
1139                                       DQTEST_HASHVAL(mp, id)) : \
1140                                      (qmtest_gdqtab + \
1141                                       DQTEST_HASHVAL(mp, id)))
1142
1143 #define DQTEST_LIST_PRINT(l, NXT, title) \
1144 { \
1145           xfs_dqtest_t  *dqp; int i = 0;\
1146           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1147           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1148                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1149                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1150                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1151                          dqp->d_bcount, dqp->d_icount); } \
1152 }
1153
1154 typedef struct dqtest {
1155         xfs_dqmarker_t  q_lists;
1156         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1157         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1158         xfs_dqid_t      d_id;           /* user id or group id */
1159         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1160         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1161 } xfs_dqtest_t;
1162
1163 STATIC void
1164 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1165 {
1166         xfs_dquot_t *d;
1167         if (((d) = (h)->qh_next))
1168                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1169         (dqp)->HL_NEXT = d;
1170         (dqp)->HL_PREVP = &((h)->qh_next);
1171         (h)->qh_next = (xfs_dquot_t *)dqp;
1172         (h)->qh_version++;
1173         (h)->qh_nelems++;
1174 }
1175 STATIC void
1176 xfs_qm_dqtest_print(
1177         xfs_dqtest_t    *d)
1178 {
1179         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1180         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1181         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1182         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1183                 d->d_bcount, (int)d->d_bcount);
1184         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1185                 d->d_icount, (int)d->d_icount);
1186         cmn_err(CE_DEBUG, "---------------------------");
1187 }
1188
1189 STATIC void
1190 xfs_qm_dqtest_failed(
1191         xfs_dqtest_t    *d,
1192         xfs_dquot_t     *dqp,
1193         char            *reason,
1194         xfs_qcnt_t      a,
1195         xfs_qcnt_t      b,
1196         int             error)
1197 {
1198         qmtest_nfails++;
1199         if (error)
1200                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1201                        d->d_id, error, reason);
1202         else
1203                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1204                        d->d_id, reason, (int)a, (int)b);
1205         xfs_qm_dqtest_print(d);
1206         if (dqp)
1207                 xfs_qm_dqprint(dqp);
1208 }
1209
1210 STATIC int
1211 xfs_dqtest_cmp2(
1212         xfs_dqtest_t    *d,
1213         xfs_dquot_t     *dqp)
1214 {
1215         int err = 0;
1216         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1217                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1218                         be64_to_cpu(dqp->q_core.d_icount),
1219                         d->d_icount, 0);
1220                 err++;
1221         }
1222         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1223                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1224                         be64_to_cpu(dqp->q_core.d_bcount),
1225                         d->d_bcount, 0);
1226                 err++;
1227         }
1228         if (dqp->q_core.d_blk_softlimit &&
1229             be64_to_cpu(dqp->q_core.d_bcount) >=
1230             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1231                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1232                         cmn_err(CE_DEBUG,
1233                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1234                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1235                         err++;
1236                 }
1237         }
1238         if (dqp->q_core.d_ino_softlimit &&
1239             be64_to_cpu(dqp->q_core.d_icount) >=
1240             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1241                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1242                         cmn_err(CE_DEBUG,
1243                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1244                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1245                         err++;
1246                 }
1247         }
1248 #ifdef QUOTADEBUG
1249         if (!err) {
1250                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1251                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1252         }
1253 #endif
1254         return (err);
1255 }
1256
1257 STATIC void
1258 xfs_dqtest_cmp(
1259         xfs_dqtest_t    *d)
1260 {
1261         xfs_dquot_t     *dqp;
1262         int             error;
1263
1264         /* xfs_qm_dqtest_print(d); */
1265         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1266                                  &dqp))) {
1267                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1268                 return;
1269         }
1270         xfs_dqtest_cmp2(d, dqp);
1271         xfs_qm_dqput(dqp);
1272 }
1273
1274 STATIC int
1275 xfs_qm_internalqcheck_dqget(
1276         xfs_mount_t     *mp,
1277         xfs_dqid_t      id,
1278         uint            type,
1279         xfs_dqtest_t    **O_dq)
1280 {
1281         xfs_dqtest_t    *d;
1282         xfs_dqhash_t    *h;
1283
1284         h = DQTEST_HASH(mp, id, type);
1285         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1286              d = (xfs_dqtest_t *) d->HL_NEXT) {
1287                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1288                 if (d->d_id == id && mp == d->q_mount) {
1289                         *O_dq = d;
1290                         return (0);
1291                 }
1292         }
1293         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1294         d->dq_flags = type;
1295         d->d_id = id;
1296         d->q_mount = mp;
1297         d->q_hash = h;
1298         xfs_qm_hashinsert(h, d);
1299         *O_dq = d;
1300         return (0);
1301 }
1302
1303 STATIC void
1304 xfs_qm_internalqcheck_get_dquots(
1305         xfs_mount_t     *mp,
1306         xfs_dqid_t      uid,
1307         xfs_dqid_t      projid,
1308         xfs_dqid_t      gid,
1309         xfs_dqtest_t    **ud,
1310         xfs_dqtest_t    **gd)
1311 {
1312         if (XFS_IS_UQUOTA_ON(mp))
1313                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1314         if (XFS_IS_GQUOTA_ON(mp))
1315                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1316         else if (XFS_IS_PQUOTA_ON(mp))
1317                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1318 }
1319
1320
1321 STATIC void
1322 xfs_qm_internalqcheck_dqadjust(
1323         xfs_inode_t             *ip,
1324         xfs_dqtest_t            *d)
1325 {
1326         d->d_icount++;
1327         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1328 }
1329
1330 STATIC int
1331 xfs_qm_internalqcheck_adjust(
1332         xfs_mount_t     *mp,            /* mount point for filesystem */
1333         xfs_ino_t       ino,            /* inode number to get data for */
1334         void            __user *buffer, /* not used */
1335         int             ubsize,         /* not used */
1336         void            *private_data,  /* not used */
1337         xfs_daddr_t     bno,            /* starting block of inode cluster */
1338         int             *ubused,        /* not used */
1339         void            *dip,           /* not used */
1340         int             *res)           /* bulkstat result code */
1341 {
1342         xfs_inode_t             *ip;
1343         xfs_dqtest_t            *ud, *gd;
1344         uint                    lock_flags;
1345         boolean_t               ipreleased;
1346         int                     error;
1347
1348         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1349
1350         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1351                 *res = BULKSTAT_RV_NOTHING;
1352                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1353                         (unsigned long long) ino,
1354                         (unsigned long long) mp->m_sb.sb_uquotino,
1355                         (unsigned long long) mp->m_sb.sb_gquotino);
1356                 return XFS_ERROR(EINVAL);
1357         }
1358         ipreleased = B_FALSE;
1359  again:
1360         lock_flags = XFS_ILOCK_SHARED;
1361         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1362                 *res = BULKSTAT_RV_NOTHING;
1363                 return (error);
1364         }
1365
1366         if (ip->i_d.di_mode == 0) {
1367                 xfs_iput_new(ip, lock_flags);
1368                 *res = BULKSTAT_RV_NOTHING;
1369                 return XFS_ERROR(ENOENT);
1370         }
1371
1372         /*
1373          * This inode can have blocks after eof which can get released
1374          * when we send it to inactive. Since we don't check the dquot
1375          * until the after all our calculations are done, we must get rid
1376          * of those now.
1377          */
1378         if (! ipreleased) {
1379                 xfs_iput(ip, lock_flags);
1380                 ipreleased = B_TRUE;
1381                 goto again;
1382         }
1383         xfs_qm_internalqcheck_get_dquots(mp,
1384                                         (xfs_dqid_t) ip->i_d.di_uid,
1385                                         (xfs_dqid_t) ip->i_d.di_projid,
1386                                         (xfs_dqid_t) ip->i_d.di_gid,
1387                                         &ud, &gd);
1388         if (XFS_IS_UQUOTA_ON(mp)) {
1389                 ASSERT(ud);
1390                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1391         }
1392         if (XFS_IS_OQUOTA_ON(mp)) {
1393                 ASSERT(gd);
1394                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1395         }
1396         xfs_iput(ip, lock_flags);
1397         *res = BULKSTAT_RV_DIDONE;
1398         return (0);
1399 }
1400
1401
1402 /* PRIVATE, debugging */
1403 int
1404 xfs_qm_internalqcheck(
1405         xfs_mount_t     *mp)
1406 {
1407         xfs_ino_t       lastino;
1408         int             done, count;
1409         int             i;
1410         xfs_dqtest_t    *d, *e;
1411         xfs_dqhash_t    *h1;
1412         int             error;
1413
1414         lastino = 0;
1415         qmtest_hashmask = 32;
1416         count = 5;
1417         done = 0;
1418         qmtest_nfails = 0;
1419
1420         if (! XFS_IS_QUOTA_ON(mp))
1421                 return XFS_ERROR(ESRCH);
1422
1423         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1424         XFS_bflush(mp->m_ddev_targp);
1425         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1426         XFS_bflush(mp->m_ddev_targp);
1427
1428         mutex_lock(&qcheck_lock);
1429         /* There should be absolutely no quota activity while this
1430            is going on. */
1431         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1432                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1433         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1434                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1435         do {
1436                 /*
1437                  * Iterate thru all the inodes in the file system,
1438                  * adjusting the corresponding dquot counters
1439                  */
1440                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1441                                  xfs_qm_internalqcheck_adjust, NULL,
1442                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1443                         break;
1444                 }
1445         } while (! done);
1446         if (error) {
1447                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1448         }
1449         cmn_err(CE_DEBUG, "Checking results against system dquots");
1450         for (i = 0; i < qmtest_hashmask; i++) {
1451                 h1 = &qmtest_udqtab[i];
1452                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1453                         xfs_dqtest_cmp(d);
1454                         e = (xfs_dqtest_t *) d->HL_NEXT;
1455                         kmem_free(d, sizeof(xfs_dqtest_t));
1456                         d = e;
1457                 }
1458                 h1 = &qmtest_gdqtab[i];
1459                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1460                         xfs_dqtest_cmp(d);
1461                         e = (xfs_dqtest_t *) d->HL_NEXT;
1462                         kmem_free(d, sizeof(xfs_dqtest_t));
1463                         d = e;
1464                 }
1465         }
1466
1467         if (qmtest_nfails) {
1468                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1469                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1470         } else {
1471                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1472         }
1473         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1474         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1475         mutex_unlock(&qcheck_lock);
1476         return (qmtest_nfails);
1477 }
1478
1479 #endif /* DEBUG */