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

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "xfs.h"
  19 #include "xfs_fs.h"
  20 #include "xfs_bit.h"
  21 #include "xfs_log.h"
  22 #include "xfs_inum.h"
  23 #include "xfs_trans.h"
  24 #include "xfs_sb.h"
  25 #include "xfs_ag.h"
  26 #include "xfs_dir.h"
  27 #include "xfs_dir2.h"
  28 #include "xfs_alloc.h"
  29 #include "xfs_dmapi.h"
  30 #include "xfs_quota.h"
  31 #include "xfs_mount.h"
  32 #include "xfs_bmap_btree.h"
  33 #include "xfs_alloc_btree.h"
  34 #include "xfs_ialloc_btree.h"
  35 #include "xfs_dir_sf.h"
  36 #include "xfs_dir2_sf.h"
  37 #include "xfs_attr_sf.h"
  38 #include "xfs_dinode.h"
  39 #include "xfs_inode.h"
  40 #include "xfs_ialloc.h"
  41 #include "xfs_itable.h"
  42 #include "xfs_bmap.h"
  43 #include "xfs_btree.h"
  44 #include "xfs_rtalloc.h"
  45 #include "xfs_error.h"
  46 #include "xfs_rw.h"
  47 #include "xfs_acl.h"
  48 #include "xfs_cap.h"
  49 #include "xfs_mac.h"
  50 #include "xfs_attr.h"
  51 #include "xfs_buf_item.h"
  52 #include "xfs_utils.h"
  53 #include "xfs_qm.h"
  54
  55 #ifdef DEBUG
  56 # define qdprintk(s, args...)   cmn_err(CE_DEBUG, s, ## args)
  57 #else
  58 # define qdprintk(s, args...)   do { } while (0)
  59 #endif
  60
  61 STATIC int      xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
  62 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
  63                                         fs_disk_quota_t *);
  64 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
  65 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
  66                                         fs_disk_quota_t *);
  67 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
  68 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
  69 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
  70 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
  71                                         uint);
  72 STATIC uint     xfs_qm_import_flags(uint);
  73 STATIC uint     xfs_qm_export_flags(uint);
  74 STATIC uint     xfs_qm_import_qtype_flags(uint);
  75 STATIC uint     xfs_qm_export_qtype_flags(uint);
  76 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
  77                                         fs_disk_quota_t *);
  78
  79
  80 /*
  81  * The main distribution switch of all XFS quotactl system calls.
  82  */
  83 int
  84 xfs_qm_quotactl(
  85         struct bhv_desc *bdp,
  86         int             cmd,
  87         int             id,
  88         xfs_caddr_t     addr)
  89 {
  90         xfs_mount_t     *mp;
  91         int             error;
  92         struct vfs      *vfsp;
  93
  94         vfsp = bhvtovfs(bdp);
  95         mp = XFS_VFSTOM(vfsp);
  96
  97         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
  98
  99         /*
 100          * The following commands are valid even when quotaoff.
 101          */
 102         switch (cmd) {
 103         case Q_XQUOTARM:
 104                 /*
 105                  * Truncate quota files. quota must be off.
 106                  */
 107                 if (XFS_IS_QUOTA_ON(mp))
 108                         return XFS_ERROR(EINVAL);
 109                 if (vfsp->vfs_flag & VFS_RDONLY)
 110                         return XFS_ERROR(EROFS);
 111                 return (xfs_qm_scall_trunc_qfiles(mp,
 112                                xfs_qm_import_qtype_flags(*(uint *)addr)));
 113
 114         case Q_XGETQSTAT:
 115                 /*
 116                  * Get quota status information.
 117                  */
 118                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
 119
 120         case Q_XQUOTAON:
 121                 /*
 122                  * QUOTAON - enabling quota enforcement.
 123                  * Quota accounting must be turned on at mount time.
 124                  */
 125                 if (vfsp->vfs_flag & VFS_RDONLY)
 126                         return XFS_ERROR(EROFS);
 127                 return (xfs_qm_scall_quotaon(mp,
 128                                           xfs_qm_import_flags(*(uint *)addr)));
 129
 130         case Q_XQUOTAOFF:
 131                 if (vfsp->vfs_flag & VFS_RDONLY)
 132                         return XFS_ERROR(EROFS);
 133                 break;
 134
 135         case Q_XQUOTASYNC:
 136                 return (xfs_sync_inodes(mp, SYNC_DELWRI, 0, NULL));
 137
 138         default:
 139                 break;
 140         }
 141
 142         if (! XFS_IS_QUOTA_ON(mp))
 143                 return XFS_ERROR(ESRCH);
 144
 145         switch (cmd) {
 146         case Q_XQUOTAOFF:
 147                 if (vfsp->vfs_flag & VFS_RDONLY)
 148                         return XFS_ERROR(EROFS);
 149                 error = xfs_qm_scall_quotaoff(mp,
 150                                             xfs_qm_import_flags(*(uint *)addr),
 151                                             B_FALSE);
 152                 break;
 153
 154         case Q_XGETQUOTA:
 155                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 156                                         (fs_disk_quota_t *)addr);
 157                 break;
 158         case Q_XGETGQUOTA:
 159                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 160                                         (fs_disk_quota_t *)addr);
 161                 break;
 162         case Q_XGETPQUOTA:
 163                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 164                                         (fs_disk_quota_t *)addr);
 165                 break;
 166
 167         case Q_XSETQLIM:
 168                 if (vfsp->vfs_flag & VFS_RDONLY)
 169                         return XFS_ERROR(EROFS);
 170                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 171                                              (fs_disk_quota_t *)addr);
 172                 break;
 173         case Q_XSETGQLIM:
 174                 if (vfsp->vfs_flag & VFS_RDONLY)
 175                         return XFS_ERROR(EROFS);
 176                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 177                                              (fs_disk_quota_t *)addr);
 178                 break;
 179         case Q_XSETPQLIM:
 180                 if (vfsp->vfs_flag & VFS_RDONLY)
 181                         return XFS_ERROR(EROFS);
 182                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 183                                              (fs_disk_quota_t *)addr);
 184                 break;
 185
 186         default:
 187                 error = XFS_ERROR(EINVAL);
 188                 break;
 189         }
 190
 191         return (error);
 192 }
 193
 194 /*
 195  * Turn off quota accounting and/or enforcement for all udquots and/or
 196  * gdquots. Called only at unmount time.
 197  *
 198  * This assumes that there are no dquots of this file system cached
 199  * incore, and modifies the ondisk dquot directly. Therefore, for example,
 200  * it is an error to call this twice, without purging the cache.
 201  */
 202 STATIC int
 203 xfs_qm_scall_quotaoff(
 204         xfs_mount_t             *mp,
 205         uint                    flags,
 206         boolean_t               force)
 207 {
 208         uint                    dqtype;
 209         unsigned long   s;
 210         int                     error;
 211         uint                    inactivate_flags;
 212         xfs_qoff_logitem_t      *qoffstart;
 213         int                     nculprits;
 214
 215         if (!force && !capable(CAP_SYS_ADMIN))
 216                 return XFS_ERROR(EPERM);
 217         /*
 218          * No file system can have quotas enabled on disk but not in core.
 219          * Note that quota utilities (like quotaoff) _expect_
 220          * errno == EEXIST here.
 221          */
 222         if ((mp->m_qflags & flags) == 0)
 223                 return XFS_ERROR(EEXIST);
 224         error = 0;
 225
 226         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 227
 228         /*
 229          * We don't want to deal with two quotaoffs messing up each other,
 230          * so we're going to serialize it. quotaoff isn't exactly a performance
 231          * critical thing.
 232          * If quotaoff, then we must be dealing with the root filesystem.
 233          */
 234         ASSERT(mp->m_quotainfo);
 235         if (mp->m_quotainfo)
 236                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 237
 238         ASSERT(mp->m_quotainfo);
 239
 240         /*
 241          * If we're just turning off quota enforcement, change mp and go.
 242          */
 243         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
 244                 mp->m_qflags &= ~(flags);
 245
 246                 s = XFS_SB_LOCK(mp);
 247                 mp->m_sb.sb_qflags = mp->m_qflags;
 248                 XFS_SB_UNLOCK(mp, s);
 249                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 250
 251                 /* XXX what to do if error ? Revert back to old vals incore ? */
 252                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
 253                 return (error);
 254         }
 255
 256         dqtype = 0;
 257         inactivate_flags = 0;
 258         /*
 259          * If accounting is off, we must turn enforcement off, clear the
 260          * quota 'CHKD' certificate to make it known that we have to
 261          * do a quotacheck the next time this quota is turned on.
 262          */
 263         if (flags & XFS_UQUOTA_ACCT) {
 264                 dqtype |= XFS_QMOPT_UQUOTA;
 265                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
 266                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
 267         }
 268         if (flags & XFS_GQUOTA_ACCT) {
 269                 dqtype |= XFS_QMOPT_GQUOTA;
 270                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 271                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
 272         } else if (flags & XFS_PQUOTA_ACCT) {
 273                 dqtype |= XFS_QMOPT_PQUOTA;
 274                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 275                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
 276         }
 277
 278         /*
 279          * Nothing to do?  Don't complain. This happens when we're just
 280          * turning off quota enforcement.
 281          */
 282         if ((mp->m_qflags & flags) == 0) {
 283                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 284                 return (0);
 285         }
 286
 287         /*
 288          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
 289          * and synchronously.
 290          */
 291         xfs_qm_log_quotaoff(mp, &qoffstart, flags);
 292
 293         /*
 294          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
 295          * to take care of the race between dqget and quotaoff. We don't take
 296          * any special locks to reset these bits. All processes need to check
 297          * these bits *after* taking inode lock(s) to see if the particular
 298          * quota type is in the process of being turned off. If *ACTIVE, it is
 299          * guaranteed that all dquot structures and all quotainode ptrs will all
 300          * stay valid as long as that inode is kept locked.
 301          *
 302          * There is no turning back after this.
 303          */
 304         mp->m_qflags &= ~inactivate_flags;
 305
 306         /*
 307          * Give back all the dquot reference(s) held by inodes.
 308          * Here we go thru every single incore inode in this file system, and
 309          * do a dqrele on the i_udquot/i_gdquot that it may have.
 310          * Essentially, as long as somebody has an inode locked, this guarantees
 311          * that quotas will not be turned off. This is handy because in a
 312          * transaction once we lock the inode(s) and check for quotaon, we can
 313          * depend on the quota inodes (and other things) being valid as long as
 314          * we keep the lock(s).
 315          */
 316         xfs_qm_dqrele_all_inodes(mp, flags);
 317
 318         /*
 319          * Next we make the changes in the quota flag in the mount struct.
 320          * This isn't protected by a particular lock directly, because we
 321          * don't want to take a mrlock everytime we depend on quotas being on.
 322          */
 323         mp->m_qflags &= ~(flags);
 324
 325         /*
 326          * Go through all the dquots of this file system and purge them,
 327          * according to what was turned off. We may not be able to get rid
 328          * of all dquots, because dquots can have temporary references that
 329          * are not attached to inodes. eg. xfs_setattr, xfs_create.
 330          * So, if we couldn't purge all the dquots from the filesystem,
 331          * we can't get rid of the incore data structures.
 332          */
 333         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
 334                 delay(10 * nculprits);
 335
 336         /*
 337          * Transactions that had started before ACTIVE state bit was cleared
 338          * could have logged many dquots, so they'd have higher LSNs than
 339          * the first QUOTAOFF log record does. If we happen to crash when
 340          * the tail of the log has gone past the QUOTAOFF record, but
 341          * before the last dquot modification, those dquots __will__
 342          * recover, and that's not good.
 343          *
 344          * So, we have QUOTAOFF start and end logitems; the start
 345          * logitem won't get overwritten until the end logitem appears...
 346          */
 347         xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
 348
 349         /*
 350          * If quotas is completely disabled, close shop.
 351          */
 352         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
 353             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
 354                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 355                 xfs_qm_destroy_quotainfo(mp);
 356                 return (0);
 357         }
 358
 359         /*
 360          * Release our quotainode references, and vn_purge them,
 361          * if we don't need them anymore.
 362          */
 363         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
 364                 XFS_PURGE_INODE(XFS_QI_UQIP(mp));
 365                 XFS_QI_UQIP(mp) = NULL;
 366         }
 367         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
 368                 XFS_PURGE_INODE(XFS_QI_GQIP(mp));
 369                 XFS_QI_GQIP(mp) = NULL;
 370         }
 371         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 372
 373         return (error);
 374 }
 375
 376 STATIC int
 377 xfs_qm_scall_trunc_qfiles(
 378         xfs_mount_t     *mp,
 379         uint            flags)
 380 {
 381         int             error;
 382         xfs_inode_t     *qip;
 383
 384         if (!capable(CAP_SYS_ADMIN))
 385                 return XFS_ERROR(EPERM);
 386         error = 0;
 387         if (!XFS_SB_VERSION_HASQUOTA(&mp->m_sb) || flags == 0) {
 388                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
 389                 return XFS_ERROR(EINVAL);
 390         }
 391
 392         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
 393                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
 394                 if (! error) {
 395                         (void) xfs_truncate_file(mp, qip);
 396                         VN_RELE(XFS_ITOV(qip));
 397                 }
 398         }
 399
 400         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
 401             mp->m_sb.sb_gquotino != NULLFSINO) {
 402                 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
 403                 if (! error) {
 404                         (void) xfs_truncate_file(mp, qip);
 405                         VN_RELE(XFS_ITOV(qip));
 406                 }
 407         }
 408
 409         return (error);
 410 }
 411
 412
 413 /*
 414  * Switch on (a given) quota enforcement for a filesystem.  This takes
 415  * effect immediately.
 416  * (Switching on quota accounting must be done at mount time.)
 417  */
 418 STATIC int
 419 xfs_qm_scall_quotaon(
 420         xfs_mount_t     *mp,
 421         uint            flags)
 422 {
 423         int             error;
 424         unsigned long   s;
 425         uint            qf;
 426         uint            accflags;
 427         __int64_t       sbflags;
 428
 429         if (!capable(CAP_SYS_ADMIN))
 430                 return XFS_ERROR(EPERM);
 431
 432         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 433         /*
 434          * Switching on quota accounting must be done at mount time.
 435          */
 436         accflags = flags & XFS_ALL_QUOTA_ACCT;
 437         flags &= ~(XFS_ALL_QUOTA_ACCT);
 438
 439         sbflags = 0;
 440
 441         if (flags == 0) {
 442                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
 443                 return XFS_ERROR(EINVAL);
 444         }
 445
 446         /* No fs can turn on quotas with a delayed effect */
 447         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 448
 449         /*
 450          * Can't enforce without accounting. We check the superblock
 451          * qflags here instead of m_qflags because rootfs can have
 452          * quota acct on ondisk without m_qflags' knowing.
 453          */
 454         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 455             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 456             (flags & XFS_UQUOTA_ENFD))
 457             ||
 458             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 459             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 460             (flags & XFS_OQUOTA_ENFD))
 461             ||
 462             ((flags & XFS_GQUOTA_ACCT) == 0 &&
 463             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 464             (flags & XFS_OQUOTA_ENFD))) {
 465                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 466                         flags, mp->m_sb.sb_qflags);
 467                 return XFS_ERROR(EINVAL);
 468         }
 469         /*
 470          * If everything's upto-date incore, then don't waste time.
 471          */
 472         if ((mp->m_qflags & flags) == flags)
 473                 return XFS_ERROR(EEXIST);
 474
 475         /*
 476          * Change sb_qflags on disk but not incore mp->qflags
 477          * if this is the root filesystem.
 478          */
 479         s = XFS_SB_LOCK(mp);
 480         qf = mp->m_sb.sb_qflags;
 481         mp->m_sb.sb_qflags = qf | flags;
 482         XFS_SB_UNLOCK(mp, s);
 483
 484         /*
 485          * There's nothing to change if it's the same.
 486          */
 487         if ((qf & flags) == flags && sbflags == 0)
 488                 return XFS_ERROR(EEXIST);
 489         sbflags |= XFS_SB_QFLAGS;
 490
 491         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 492                 return (error);
 493         /*
 494          * If we aren't trying to switch on quota enforcement, we are done.
 495          */
 496         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 497              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 498              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 499              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 500              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 501              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 502             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 503                 return (0);
 504
 505         if (! XFS_IS_QUOTA_RUNNING(mp))
 506                 return XFS_ERROR(ESRCH);
 507
 508         /*
 509          * Switch on quota enforcement in core.
 510          */
 511         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 512         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 513         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 514
 515         return (0);
 516 }
 517
 518
 519 /*
 520  * Return quota status information, such as uquota-off, enforcements, etc.
 521  */
 522 STATIC int
 523 xfs_qm_scall_getqstat(
 524         xfs_mount_t     *mp,
 525         fs_quota_stat_t *out)
 526 {
 527         xfs_inode_t     *uip, *gip;
 528         boolean_t       tempuqip, tempgqip;
 529
 530         uip = gip = NULL;
 531         tempuqip = tempgqip = B_FALSE;
 532         memset(out, 0, sizeof(fs_quota_stat_t));
 533
 534         out->qs_version = FS_QSTAT_VERSION;
 535         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
 536                 out->qs_uquota.qfs_ino = NULLFSINO;
 537                 out->qs_gquota.qfs_ino = NULLFSINO;
 538                 return (0);
 539         }
 540         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 541                                                         (XFS_ALL_QUOTA_ACCT|
 542                                                          XFS_ALL_QUOTA_ENFD));
 543         out->qs_pad = 0;
 544         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 545         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 546
 547         if (mp->m_quotainfo) {
 548                 uip = mp->m_quotainfo->qi_uquotaip;
 549                 gip = mp->m_quotainfo->qi_gquotaip;
 550         }
 551         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 552                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 553                                         0, 0, &uip, 0) == 0)
 554                         tempuqip = B_TRUE;
 555         }
 556         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 557                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 558                                         0, 0, &gip, 0) == 0)
 559                         tempgqip = B_TRUE;
 560         }
 561         if (uip) {
 562                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 563                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 564                 if (tempuqip)
 565                         VN_RELE(XFS_ITOV(uip));
 566         }
 567         if (gip) {
 568                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 569                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 570                 if (tempgqip)
 571                         VN_RELE(XFS_ITOV(gip));
 572         }
 573         if (mp->m_quotainfo) {
 574                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 575                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 576                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 577                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 578                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 579                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 580         }
 581         return (0);
 582 }
 583
 584 /*
 585  * Adjust quota limits, and start/stop timers accordingly.
 586  */
 587 STATIC int
 588 xfs_qm_scall_setqlim(
 589         xfs_mount_t             *mp,
 590         xfs_dqid_t              id,
 591         uint                    type,
 592         fs_disk_quota_t         *newlim)
 593 {
 594         xfs_disk_dquot_t        *ddq;
 595         xfs_dquot_t             *dqp;
 596         xfs_trans_t             *tp;
 597         int                     error;
 598         xfs_qcnt_t              hard, soft;
 599
 600         if (!capable(CAP_SYS_ADMIN))
 601                 return XFS_ERROR(EPERM);
 602
 603         if ((newlim->d_fieldmask &
 604             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 605                 return (0);
 606
 607         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 608         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 609                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 610                 xfs_trans_cancel(tp, 0);
 611                 return (error);
 612         }
 613
 614         /*
 615          * We don't want to race with a quotaoff so take the quotaoff lock.
 616          * (We don't hold an inode lock, so there's nothing else to stop
 617          * a quotaoff from happening). (XXXThis doesn't currently happen
 618          * because we take the vfslock before calling xfs_qm_sysent).
 619          */
 620         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 621
 622         /*
 623          * Get the dquot (locked), and join it to the transaction.
 624          * Allocate the dquot if this doesn't exist.
 625          */
 626         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 627                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 628                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 629                 ASSERT(error != ENOENT);
 630                 return (error);
 631         }
 632         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 633         xfs_trans_dqjoin(tp, dqp);
 634         ddq = &dqp->q_core;
 635
 636         /*
 637          * Make sure that hardlimits are >= soft limits before changing.
 638          */
 639         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 640                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 641                         be64_to_cpu(ddq->d_blk_hardlimit);
 642         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 643                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 644                         be64_to_cpu(ddq->d_blk_softlimit);
 645         if (hard == 0 || hard >= soft) {
 646                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 647                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 648                 if (id == 0) {
 649                         mp->m_quotainfo->qi_bhardlimit = hard;
 650                         mp->m_quotainfo->qi_bsoftlimit = soft;
 651                 }
 652         } else {
 653                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 654         }
 655         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 656                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 657                         be64_to_cpu(ddq->d_rtb_hardlimit);
 658         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 659                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 660                         be64_to_cpu(ddq->d_rtb_softlimit);
 661         if (hard == 0 || hard >= soft) {
 662                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 663                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 664                 if (id == 0) {
 665                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 666                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 667                 }
 668         } else {
 669                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 670         }
 671
 672         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 673                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 674                         be64_to_cpu(ddq->d_ino_hardlimit);
 675         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 676                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 677                         be64_to_cpu(ddq->d_ino_softlimit);
 678         if (hard == 0 || hard >= soft) {
 679                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 680                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 681                 if (id == 0) {
 682                         mp->m_quotainfo->qi_ihardlimit = hard;
 683                         mp->m_quotainfo->qi_isoftlimit = soft;
 684                 }
 685         } else {
 686                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 687         }
 688
 689         /*
 690          * Update warnings counter(s) if requested
 691          */
 692         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 693                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 694         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 695                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 696         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 697                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 698
 699         if (id == 0) {
 700                 /*
 701                  * Timelimits for the super user set the relative time
 702                  * the other users can be over quota for this file system.
 703                  * If it is zero a default is used.  Ditto for the default
 704                  * soft and hard limit values (already done, above), and
 705                  * for warnings.
 706                  */
 707                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 708                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 709                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 710                 }
 711                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 712                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 713                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 714                 }
 715                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 716                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 717                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 718                 }
 719                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 720                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 721                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 722                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 723                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 724                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 725         } else {
 726                 /*
 727                  * If the user is now over quota, start the timelimit.
 728                  * The user will not be 'warned'.
 729                  * Note that we keep the timers ticking, whether enforcement
 730                  * is on or off. We don't really want to bother with iterating
 731                  * over all ondisk dquots and turning the timers on/off.
 732                  */
 733                 xfs_qm_adjust_dqtimers(mp, ddq);
 734         }
 735         dqp->dq_flags |= XFS_DQ_DIRTY;
 736         xfs_trans_log_dquot(tp, dqp);
 737
 738         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 739         xfs_trans_commit(tp, 0, NULL);
 740         xfs_qm_dqprint(dqp);
 741         xfs_qm_dqrele(dqp);
 742         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 743
 744         return (0);
 745 }
 746
 747 STATIC int
 748 xfs_qm_scall_getquota(
 749         xfs_mount_t     *mp,
 750         xfs_dqid_t      id,
 751         uint            type,
 752         fs_disk_quota_t *out)
 753 {
 754         xfs_dquot_t     *dqp;
 755         int             error;
 756
 757         /*
 758          * Try to get the dquot. We don't want it allocated on disk, so
 759          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 760          * exist, we'll get ENOENT back.
 761          */
 762         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 763                 return (error);
 764         }
 765
 766         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 767         /*
 768          * If everything's NULL, this dquot doesn't quite exist as far as
 769          * our utility programs are concerned.
 770          */
 771         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 772                 xfs_qm_dqput(dqp);
 773                 return XFS_ERROR(ENOENT);
 774         }
 775         /* xfs_qm_dqprint(dqp); */
 776         /*
 777          * Convert the disk dquot to the exportable format
 778          */
 779         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 780         xfs_qm_dqput(dqp);
 781         return (error ? XFS_ERROR(EFAULT) : 0);
 782 }
 783
 784
 785 STATIC int
 786 xfs_qm_log_quotaoff_end(
 787         xfs_mount_t             *mp,
 788         xfs_qoff_logitem_t      *startqoff,
 789         uint                    flags)
 790 {
 791         xfs_trans_t             *tp;
 792         int                     error;
 793         xfs_qoff_logitem_t      *qoffi;
 794
 795         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 796
 797         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 798                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 799                 xfs_trans_cancel(tp, 0);
 800                 return (error);
 801         }
 802
 803         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 804                                         flags & XFS_ALL_QUOTA_ACCT);
 805         xfs_trans_log_quotaoff_item(tp, qoffi);
 806
 807         /*
 808          * We have to make sure that the transaction is secure on disk before we
 809          * return and actually stop quota accounting. So, make it synchronous.
 810          * We don't care about quotoff's performance.
 811          */
 812         xfs_trans_set_sync(tp);
 813         error = xfs_trans_commit(tp, 0, NULL);
 814         return (error);
 815 }
 816
 817
 818 STATIC int
 819 xfs_qm_log_quotaoff(
 820         xfs_mount_t            *mp,
 821         xfs_qoff_logitem_t     **qoffstartp,
 822         uint                   flags)
 823 {
 824         xfs_trans_t            *tp;
 825         int                     error;
 826         unsigned long   s;
 827         xfs_qoff_logitem_t     *qoffi=NULL;
 828         uint                    oldsbqflag=0;
 829
 830         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 831         if ((error = xfs_trans_reserve(tp, 0,
 832                                       sizeof(xfs_qoff_logitem_t) * 2 +
 833                                       mp->m_sb.sb_sectsize + 128,
 834                                       0,
 835                                       0,
 836                                       XFS_DEFAULT_LOG_COUNT))) {
 837                 goto error0;
 838         }
 839
 840         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 841         xfs_trans_log_quotaoff_item(tp, qoffi);
 842
 843         s = XFS_SB_LOCK(mp);
 844         oldsbqflag = mp->m_sb.sb_qflags;
 845         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 846         XFS_SB_UNLOCK(mp, s);
 847
 848         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 849
 850         /*
 851          * We have to make sure that the transaction is secure on disk before we
 852          * return and actually stop quota accounting. So, make it synchronous.
 853          * We don't care about quotoff's performance.
 854          */
 855         xfs_trans_set_sync(tp);
 856         error = xfs_trans_commit(tp, 0, NULL);
 857
 858 error0:
 859         if (error) {
 860                 xfs_trans_cancel(tp, 0);
 861                 /*
 862                  * No one else is modifying sb_qflags, so this is OK.
 863                  * We still hold the quotaofflock.
 864                  */
 865                 s = XFS_SB_LOCK(mp);
 866                 mp->m_sb.sb_qflags = oldsbqflag;
 867                 XFS_SB_UNLOCK(mp, s);
 868         }
 869         *qoffstartp = qoffi;
 870         return (error);
 871 }
 872
 873
 874 /*
 875  * Translate an internal style on-disk-dquot to the exportable format.
 876  * The main differences are that the counters/limits are all in Basic
 877  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 878  * to be converted to the native endianness.
 879  */
 880 STATIC void
 881 xfs_qm_export_dquot(
 882         xfs_mount_t             *mp,
 883         xfs_disk_dquot_t        *src,
 884         struct fs_disk_quota    *dst)
 885 {
 886         memset(dst, 0, sizeof(*dst));
 887         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 888         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 889         dst->d_id = be32_to_cpu(src->d_id);
 890         dst->d_blk_hardlimit =
 891                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 892         dst->d_blk_softlimit =
 893                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 894         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 895         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 896         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 897         dst->d_icount = be64_to_cpu(src->d_icount);
 898         dst->d_btimer = be32_to_cpu(src->d_btimer);
 899         dst->d_itimer = be32_to_cpu(src->d_itimer);
 900         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 901         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 902         dst->d_rtb_hardlimit =
 903                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 904         dst->d_rtb_softlimit =
 905                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 906         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 907         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 908         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 909
 910         /*
 911          * Internally, we don't reset all the timers when quota enforcement
 912          * gets turned off. No need to confuse the userlevel code,
 913          * so return zeroes in that case.
 914          */
 915         if (! XFS_IS_QUOTA_ENFORCED(mp)) {
 916                 dst->d_btimer = 0;
 917                 dst->d_itimer = 0;
 918                 dst->d_rtbtimer = 0;
 919         }
 920
 921 #ifdef DEBUG
 922         if (XFS_IS_QUOTA_ENFORCED(mp) && dst->d_id != 0) {
 923                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 924                     (dst->d_blk_softlimit > 0)) {
 925                         ASSERT(dst->d_btimer != 0);
 926                 }
 927                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 928                     (dst->d_ino_softlimit > 0)) {
 929                         ASSERT(dst->d_itimer != 0);
 930                 }
 931         }
 932 #endif
 933 }
 934
 935 STATIC uint
 936 xfs_qm_import_qtype_flags(
 937         uint            uflags)
 938 {
 939         uint            oflags = 0;
 940
 941         /*
 942          * Can't be more than one, or none.
 943          */
 944         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 945                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 946             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 947                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 948             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 949                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 950             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 951                 return (0);
 952
 953         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 954         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 955         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 956         return oflags;
 957 }
 958
 959 STATIC uint
 960 xfs_qm_export_qtype_flags(
 961         uint flags)
 962 {
 963         /*
 964          * Can't be more than one, or none.
 965          */
 966         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 967                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 968         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 969                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 970         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 971                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 972         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 973
 974         return (flags & XFS_DQ_USER) ?
 975                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 976                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 977 }
 978
 979 STATIC uint
 980 xfs_qm_import_flags(
 981         uint uflags)
 982 {
 983         uint flags = 0;
 984
 985         if (uflags & XFS_QUOTA_UDQ_ACCT)
 986                 flags |= XFS_UQUOTA_ACCT;
 987         if (uflags & XFS_QUOTA_PDQ_ACCT)
 988                 flags |= XFS_PQUOTA_ACCT;
 989         if (uflags & XFS_QUOTA_GDQ_ACCT)
 990                 flags |= XFS_GQUOTA_ACCT;
 991         if (uflags & XFS_QUOTA_UDQ_ENFD)
 992                 flags |= XFS_UQUOTA_ENFD;
 993         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 994                 flags |= XFS_OQUOTA_ENFD;
 995         return (flags);
 996 }
 997
 998
 999 STATIC uint
1000 xfs_qm_export_flags(
1001         uint flags)
1002 {
1003         uint uflags;
1004
1005         uflags = 0;
1006         if (flags & XFS_UQUOTA_ACCT)
1007                 uflags |= XFS_QUOTA_UDQ_ACCT;
1008         if (flags & XFS_PQUOTA_ACCT)
1009                 uflags |= XFS_QUOTA_PDQ_ACCT;
1010         if (flags & XFS_GQUOTA_ACCT)
1011                 uflags |= XFS_QUOTA_GDQ_ACCT;
1012         if (flags & XFS_UQUOTA_ENFD)
1013                 uflags |= XFS_QUOTA_UDQ_ENFD;
1014         if (flags & (XFS_OQUOTA_ENFD)) {
1015                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1016                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1017         }
1018         return (uflags);
1019 }
1020
1021
1022 /*
1023  * Go thru all the inodes in the file system, releasing their dquots.
1024  * Note that the mount structure gets modified to indicate that quotas are off
1025  * AFTER this, in the case of quotaoff. This also gets called from
1026  * xfs_rootumount.
1027  */
1028 void
1029 xfs_qm_dqrele_all_inodes(
1030         struct xfs_mount *mp,
1031         uint             flags)
1032 {
1033         xfs_inode_t     *ip, *topino;
1034         uint            ireclaims;
1035         vnode_t         *vp;
1036         boolean_t       vnode_refd;
1037
1038         ASSERT(mp->m_quotainfo);
1039
1040         XFS_MOUNT_ILOCK(mp);
1041 again:
1042         ip = mp->m_inodes;
1043         if (ip == NULL) {
1044                 XFS_MOUNT_IUNLOCK(mp);
1045                 return;
1046         }
1047         do {
1048                 /* Skip markers inserted by xfs_sync */
1049                 if (ip->i_mount == NULL) {
1050                         ip = ip->i_mnext;
1051                         continue;
1052                 }
1053                 /* Root inode, rbmip and rsumip have associated blocks */
1054                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1055                         ASSERT(ip->i_udquot == NULL);
1056                         ASSERT(ip->i_gdquot == NULL);
1057                         ip = ip->i_mnext;
1058                         continue;
1059                 }
1060                 vp = XFS_ITOV_NULL(ip);
1061                 if (!vp) {
1062                         ASSERT(ip->i_udquot == NULL);
1063                         ASSERT(ip->i_gdquot == NULL);
1064                         ip = ip->i_mnext;
1065                         continue;
1066                 }
1067                 vnode_refd = B_FALSE;
1068                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1069                         ireclaims = mp->m_ireclaims;
1070                         topino = mp->m_inodes;
1071                         vp = vn_grab(vp);
1072                         if (!vp)
1073                                 goto again;
1074
1075                         XFS_MOUNT_IUNLOCK(mp);
1076                         /* XXX restart limit ? */
1077                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1078                         vnode_refd = B_TRUE;
1079                 } else {
1080                         ireclaims = mp->m_ireclaims;
1081                         topino = mp->m_inodes;
1082                         XFS_MOUNT_IUNLOCK(mp);
1083                 }
1084
1085                 /*
1086                  * We don't keep the mountlock across the dqrele() call,
1087                  * since it can take a while..
1088                  */
1089                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1090                         xfs_qm_dqrele(ip->i_udquot);
1091                         ip->i_udquot = NULL;
1092                 }
1093                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1094                         xfs_qm_dqrele(ip->i_gdquot);
1095                         ip->i_gdquot = NULL;
1096                 }
1097                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1098                 /*
1099                  * Wait until we've dropped the ilock and mountlock to
1100                  * do the vn_rele. Or be condemned to an eternity in the
1101                  * inactive code in hell.
1102                  */
1103                 if (vnode_refd)
1104                         VN_RELE(vp);
1105                 XFS_MOUNT_ILOCK(mp);
1106                 /*
1107                  * If an inode was inserted or removed, we gotta
1108                  * start over again.
1109                  */
1110                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1111                         /* XXX use a sentinel */
1112                         goto again;
1113                 }
1114                 ip = ip->i_mnext;
1115         } while (ip != mp->m_inodes);
1116
1117         XFS_MOUNT_IUNLOCK(mp);
1118 }
1119
1120 /*------------------------------------------------------------------------*/
1121 #ifdef DEBUG
1122 /*
1123  * This contains all the test functions for XFS disk quotas.
1124  * Currently it does a quota accounting check. ie. it walks through
1125  * all inodes in the file system, calculating the dquot accounting fields,
1126  * and prints out any inconsistencies.
1127  */
1128 xfs_dqhash_t *qmtest_udqtab;
1129 xfs_dqhash_t *qmtest_gdqtab;
1130 int           qmtest_hashmask;
1131 int           qmtest_nfails;
1132 mutex_t       qcheck_lock;
1133
1134 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1135                                  (__psunsigned_t)(id)) & \
1136                                 (qmtest_hashmask - 1))
1137
1138 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1139                                      (qmtest_udqtab + \
1140                                       DQTEST_HASHVAL(mp, id)) : \
1141                                      (qmtest_gdqtab + \
1142                                       DQTEST_HASHVAL(mp, id)))
1143
1144 #define DQTEST_LIST_PRINT(l, NXT, title) \
1145 { \
1146           xfs_dqtest_t  *dqp; int i = 0;\
1147           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1148           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1149                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1150                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1151                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1152                          dqp->d_bcount, dqp->d_icount); } \
1153 }
1154
1155 typedef struct dqtest {
1156         xfs_dqmarker_t  q_lists;
1157         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1158         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1159         xfs_dqid_t      d_id;           /* user id or group id */
1160         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1161         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1162 } xfs_dqtest_t;
1163
1164 STATIC void
1165 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1166 {
1167         xfs_dquot_t *d;
1168         if (((d) = (h)->qh_next))
1169                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1170         (dqp)->HL_NEXT = d;
1171         (dqp)->HL_PREVP = &((h)->qh_next);
1172         (h)->qh_next = (xfs_dquot_t *)dqp;
1173         (h)->qh_version++;
1174         (h)->qh_nelems++;
1175 }
1176 STATIC void
1177 xfs_qm_dqtest_print(
1178         xfs_dqtest_t    *d)
1179 {
1180         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1181         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1182         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1183         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1184                 d->d_bcount, (int)d->d_bcount);
1185         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1186                 d->d_icount, (int)d->d_icount);
1187         cmn_err(CE_DEBUG, "---------------------------");
1188 }
1189
1190 STATIC void
1191 xfs_qm_dqtest_failed(
1192         xfs_dqtest_t    *d,
1193         xfs_dquot_t     *dqp,
1194         char            *reason,
1195         xfs_qcnt_t      a,
1196         xfs_qcnt_t      b,
1197         int             error)
1198 {
1199         qmtest_nfails++;
1200         if (error)
1201                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1202                        d->d_id, error, reason);
1203         else
1204                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1205                        d->d_id, reason, (int)a, (int)b);
1206         xfs_qm_dqtest_print(d);
1207         if (dqp)
1208                 xfs_qm_dqprint(dqp);
1209 }
1210
1211 STATIC int
1212 xfs_dqtest_cmp2(
1213         xfs_dqtest_t    *d,
1214         xfs_dquot_t     *dqp)
1215 {
1216         int err = 0;
1217         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1218                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1219                         be64_to_cpu(dqp->q_core.d_icount),
1220                         d->d_icount, 0);
1221                 err++;
1222         }
1223         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1224                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1225                         be64_to_cpu(dqp->q_core.d_bcount),
1226                         d->d_bcount, 0);
1227                 err++;
1228         }
1229         if (dqp->q_core.d_blk_softlimit &&
1230             be64_to_cpu(dqp->q_core.d_bcount) >=
1231             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1232                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1233                         cmn_err(CE_DEBUG,
1234                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1235                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1236                         err++;
1237                 }
1238         }
1239         if (dqp->q_core.d_ino_softlimit &&
1240             be64_to_cpu(dqp->q_core.d_icount) >=
1241             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1242                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1243                         cmn_err(CE_DEBUG,
1244                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1245                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1246                         err++;
1247                 }
1248         }
1249 #ifdef QUOTADEBUG
1250         if (!err) {
1251                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1252                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1253         }
1254 #endif
1255         return (err);
1256 }
1257
1258 STATIC void
1259 xfs_dqtest_cmp(
1260         xfs_dqtest_t    *d)
1261 {
1262         xfs_dquot_t     *dqp;
1263         int             error;
1264
1265         /* xfs_qm_dqtest_print(d); */
1266         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1267                                  &dqp))) {
1268                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1269                 return;
1270         }
1271         xfs_dqtest_cmp2(d, dqp);
1272         xfs_qm_dqput(dqp);
1273 }
1274
1275 STATIC int
1276 xfs_qm_internalqcheck_dqget(
1277         xfs_mount_t     *mp,
1278         xfs_dqid_t      id,
1279         uint            type,
1280         xfs_dqtest_t    **O_dq)
1281 {
1282         xfs_dqtest_t    *d;
1283         xfs_dqhash_t    *h;
1284
1285         h = DQTEST_HASH(mp, id, type);
1286         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1287              d = (xfs_dqtest_t *) d->HL_NEXT) {
1288                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1289                 if (d->d_id == id && mp == d->q_mount) {
1290                         *O_dq = d;
1291                         return (0);
1292                 }
1293         }
1294         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1295         d->dq_flags = type;
1296         d->d_id = id;
1297         d->q_mount = mp;
1298         d->q_hash = h;
1299         xfs_qm_hashinsert(h, d);
1300         *O_dq = d;
1301         return (0);
1302 }
1303
1304 STATIC void
1305 xfs_qm_internalqcheck_get_dquots(
1306         xfs_mount_t     *mp,
1307         xfs_dqid_t      uid,
1308         xfs_dqid_t      projid,
1309         xfs_dqid_t      gid,
1310         xfs_dqtest_t    **ud,
1311         xfs_dqtest_t    **gd)
1312 {
1313         if (XFS_IS_UQUOTA_ON(mp))
1314                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1315         if (XFS_IS_GQUOTA_ON(mp))
1316                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1317         else if (XFS_IS_PQUOTA_ON(mp))
1318                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1319 }
1320
1321
1322 STATIC void
1323 xfs_qm_internalqcheck_dqadjust(
1324         xfs_inode_t             *ip,
1325         xfs_dqtest_t            *d)
1326 {
1327         d->d_icount++;
1328         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1329 }
1330
1331 STATIC int
1332 xfs_qm_internalqcheck_adjust(
1333         xfs_mount_t     *mp,            /* mount point for filesystem */
1334         xfs_ino_t       ino,            /* inode number to get data for */
1335         void            __user *buffer, /* not used */
1336         int             ubsize,         /* not used */
1337         void            *private_data,  /* not used */
1338         xfs_daddr_t     bno,            /* starting block of inode cluster */
1339         int             *ubused,        /* not used */
1340         void            *dip,           /* not used */
1341         int             *res)           /* bulkstat result code */
1342 {
1343         xfs_inode_t             *ip;
1344         xfs_dqtest_t            *ud, *gd;
1345         uint                    lock_flags;
1346         boolean_t               ipreleased;
1347         int                     error;
1348
1349         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1350
1351         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1352                 *res = BULKSTAT_RV_NOTHING;
1353                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1354                         (unsigned long long) ino,
1355                         (unsigned long long) mp->m_sb.sb_uquotino,
1356                         (unsigned long long) mp->m_sb.sb_gquotino);
1357                 return XFS_ERROR(EINVAL);
1358         }
1359         ipreleased = B_FALSE;
1360  again:
1361         lock_flags = XFS_ILOCK_SHARED;
1362         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1363                 *res = BULKSTAT_RV_NOTHING;
1364                 return (error);
1365         }
1366
1367         if (ip->i_d.di_mode == 0) {
1368                 xfs_iput_new(ip, lock_flags);
1369                 *res = BULKSTAT_RV_NOTHING;
1370                 return XFS_ERROR(ENOENT);
1371         }
1372
1373         /*
1374          * This inode can have blocks after eof which can get released
1375          * when we send it to inactive. Since we don't check the dquot
1376          * until the after all our calculations are done, we must get rid
1377          * of those now.
1378          */
1379         if (! ipreleased) {
1380                 xfs_iput(ip, lock_flags);
1381                 ipreleased = B_TRUE;
1382                 goto again;
1383         }
1384         xfs_qm_internalqcheck_get_dquots(mp,
1385                                         (xfs_dqid_t) ip->i_d.di_uid,
1386                                         (xfs_dqid_t) ip->i_d.di_projid,
1387                                         (xfs_dqid_t) ip->i_d.di_gid,
1388                                         &ud, &gd);
1389         if (XFS_IS_UQUOTA_ON(mp)) {
1390                 ASSERT(ud);
1391                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1392         }
1393         if (XFS_IS_OQUOTA_ON(mp)) {
1394                 ASSERT(gd);
1395                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1396         }
1397         xfs_iput(ip, lock_flags);
1398         *res = BULKSTAT_RV_DIDONE;
1399         return (0);
1400 }
1401
1402
1403 /* PRIVATE, debugging */
1404 int
1405 xfs_qm_internalqcheck(
1406         xfs_mount_t     *mp)
1407 {
1408         xfs_ino_t       lastino;
1409         int             done, count;
1410         int             i;
1411         xfs_dqtest_t    *d, *e;
1412         xfs_dqhash_t    *h1;
1413         int             error;
1414
1415         lastino = 0;
1416         qmtest_hashmask = 32;
1417         count = 5;
1418         done = 0;
1419         qmtest_nfails = 0;
1420
1421         if (! XFS_IS_QUOTA_ON(mp))
1422                 return XFS_ERROR(ESRCH);
1423
1424         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1425         XFS_bflush(mp->m_ddev_targp);
1426         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1427         XFS_bflush(mp->m_ddev_targp);
1428
1429         mutex_lock(&qcheck_lock);
1430         /* There should be absolutely no quota activity while this
1431            is going on. */
1432         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1433                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1434         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1435                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1436         do {
1437                 /*
1438                  * Iterate thru all the inodes in the file system,
1439                  * adjusting the corresponding dquot counters
1440                  */
1441                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1442                                  xfs_qm_internalqcheck_adjust, NULL,
1443                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1444                         break;
1445                 }
1446         } while (! done);
1447         if (error) {
1448                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1449         }
1450         cmn_err(CE_DEBUG, "Checking results against system dquots");
1451         for (i = 0; i < qmtest_hashmask; i++) {
1452                 h1 = &qmtest_udqtab[i];
1453                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1454                         xfs_dqtest_cmp(d);
1455                         e = (xfs_dqtest_t *) d->HL_NEXT;
1456                         kmem_free(d, sizeof(xfs_dqtest_t));
1457                         d = e;
1458                 }
1459                 h1 = &qmtest_gdqtab[i];
1460                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1461                         xfs_dqtest_cmp(d);
1462                         e = (xfs_dqtest_t *) d->HL_NEXT;
1463                         kmem_free(d, sizeof(xfs_dqtest_t));
1464                         d = e;
1465                 }
1466         }
1467
1468         if (qmtest_nfails) {
1469                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1470                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1471         } else {
1472                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1473         }
1474         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1475         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1476         mutex_unlock(&qcheck_lock);
1477         return (qmtest_nfails);
1478 }
1479
1480 #endif /* DEBUG */