| blob | 603459229904e0b6701b4a883b262041967e9a0a |
1 /*
2 * Copyright (c) 2000-2006 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 */
56 STATIC int
60 {
68 /*
69 * If it's a directory with any blocks, read-ahead block 0
70 * as we're almost certain to have the next operation be a read there.
71 */
77 }
79 }
81 /*
82 * xfs_getattr
83 */
84 STATIC int
90 {
114 #if XFS_BIG_INUMS
116 #endif
119 /*
120 * Quick exit for non-stat callers
121 */
127 /*
128 * Copy from in-core inode.
129 */
135 /*
136 * Check vnode type block/char vs. everything else.
137 */
151 /*
152 * If the file blocks are being allocated from a
153 * realtime partition, then return the inode's
154 * realtime extent size or the realtime volume's
155 * extent size.
156 */
159 }
161 }
169 /*
170 * Exit for stat callers. See if any of the rest of the fields
171 * to be filled in are needed.
172 */
178 /*
179 * Convert di_flags to xflags.
180 */
183 /*
184 * Exit for inode revalidate. See if any of the rest of
185 * the fields to be filled in are needed.
186 */
202 else
206 all_done:
210 }
213 /*
214 * xfs_setattr
215 */
216 int
222 {
228 uint lock_flags;
246 /*
247 * Cannot set certain attributes.
248 */
252 }
260 /*
261 * Timestamps do not need to be logged and hence do not
262 * need to be done within a transaction.
263 */
271 }
276 /*
277 * If disk quotas is on, we make sure that the dquots do exist on disk,
278 * before we start any other transactions. Trying to do this later
279 * is messy. We don't care to take a readlock to look at the ids
280 * in inode here, because we can't hold it across the trans_reserve.
281 * If the IDs do change before we take the ilock, we're covered
282 * because the i_*dquot fields will get updated anyway.
283 */
293 }
299 }
305 }
306 /*
307 * We take a reference when we initialize udqp and gdqp,
308 * so it is important that we never blindly double trip on
309 * the same variable. See xfs_create() for an example.
310 */
317 }
319 /*
320 * For the other attributes, we acquire the inode lock and
321 * first do an error checking pass.
322 */
337 }
338 }
348 }
349 }
352 }
356 /* boolean: are we the file owner? */
359 /*
360 * Change various properties of a file.
361 * Only the owner or users with CAP_FOWNER
362 * capability may do these things.
363 */
367 /*
368 * CAP_FOWNER overrides the following restrictions:
369 *
370 * The user ID of the calling process must be equal
371 * to the file owner ID, except in cases where the
372 * CAP_FSETID capability is applicable.
373 */
377 }
379 /*
380 * CAP_FSETID overrides the following restrictions:
381 *
382 * The effective user ID of the calling process shall match
383 * the file owner when setting the set-user-ID and
384 * set-group-ID bits on that file.
385 *
386 * The effective group ID or one of the supplementary group
387 * IDs of the calling process shall match the group owner of
388 * the file when setting the set-group-ID bit on that file
389 */
398 #if 0
399 /* Linux allows this, Irix doesn't. */
402 #endif
405 }
406 }
408 /*
409 * Change file ownership. Must be the owner or privileged.
410 * If the system was configured with the "restricted_chown"
411 * option, the owner is not permitted to give away the file,
412 * and can change the group id only to a group of which he
413 * or she is a member.
414 */
416 /*
417 * These IDs could have changed since we last looked at them.
418 * But, we're assured that if the ownership did change
419 * while we didn't have the inode locked, inode's dquot(s)
420 * would have changed also.
421 */
428 iprojid;
430 /*
431 * CAP_CHOWN overrides the following restrictions:
432 *
433 * If _POSIX_CHOWN_RESTRICTED is defined, this capability
434 * shall override the restriction that a process cannot
435 * change the user ID of a file it owns and the restriction
436 * that the group ID supplied to the chown() function
437 * shall be equal to either the group ID or one of the
438 * supplementary group IDs of the calling process.
439 */
446 }
447 /*
448 * Do a quota reservation only if uid/projid/gid is actually
449 * going to change.
450 */
460 }
461 }
463 /*
464 * Truncate file. Must have write permission and not be a directory.
465 */
467 /* Short circuit the truncate case for zero length files */
476 }
484 }
485 /*
486 * Make sure that the dquots are attached to the inode.
487 */
490 }
492 /*
493 * Change file access or modified times.
494 */
501 }
502 }
503 }
505 /*
506 * Change extent size or realtime flag.
507 */
509 /*
510 * Can't change extent size if any extents are allocated.
511 */
517 }
519 /*
520 * Can't change realtime flag if any extents are allocated.
521 */
528 }
529 /*
530 * Extent size must be a multiple of the appropriate block
531 * size, if set at all.
532 */
534 xfs_extlen_t size;
543 }
547 }
548 }
549 /*
550 * If realtime flag is set then must have realtime data.
551 */
559 }
560 }
562 /*
563 * Can't modify an immutable/append-only file unless
564 * we have appropriate permission.
565 */
574 }
575 }
577 /*
578 * Now we can make the changes. Before we join the inode
579 * to the transaction, if XFS_AT_SIZE is set then take care of
580 * the part of the truncation that must be done without the
581 * inode lock. This needs to be done before joining the inode
582 * to the transaction, because the inode cannot be unlocked
583 * once it is a part of the transaction.
584 */
590 }
593 /*
594 * We are going to log the inode size change in this
595 * transaction so any previous writes that are beyond the on
596 * disk EOF and the new EOF that have not been written out need
597 * to be written here. If we do not write the data out, we
598 * expose ourselves to the null files problem.
599 *
600 * Only flush from the on disk size to the smaller of the in
601 * memory file size or the new size as that's the range we
602 * really care about here and prevents waiting for other data
603 * not within the range we care about here.
604 */
611 }
613 /* wait for all I/O to complete */
623 }
627 XFS_TRANS_PERM_LOG_RES,
628 XFS_ITRUNCATE_LOG_COUNT))) {
633 }
636 }
641 }
643 /* determine whether mandatory locking mode changes */
646 /*
647 * Truncate file. Must have write permission and not be a directory.
648 */
655 /*
656 * signal a sync transaction unless
657 * we're truncating an already unlinked
658 * file on a wsync filesystem
659 */
662 XFS_DATA_FORK,
668 /*
669 * Truncated "down", so we're removing references
670 * to old data here - if we now delay flushing for
671 * a long time, we expose ourselves unduly to the
672 * notorious NULL files problem. So, we mark this
673 * vnode and flush it when the file is closed, and
674 * do not wait the usual (long) time for writeout.
675 */
677 }
678 /*
679 * Have to do this even if the file's size doesn't change.
680 */
682 }
684 /*
685 * Change file access modes.
686 */
693 }
695 /*
696 * Change file ownership. Must be the owner or privileged.
697 * If the system was configured with the "restricted_chown"
698 * option, the owner is not permitted to give away the file,
699 * and can change the group id only to a group of which he
700 * or she is a member.
701 */
703 /*
704 * CAP_FSETID overrides the following restrictions:
705 *
706 * The set-user-ID and set-group-ID bits of a file will be
707 * cleared upon successful return from chown()
708 */
712 }
714 /*
715 * Change the ownerships and register quota modifications
716 * in the transaction.
717 */
724 }
726 }
734 }
736 }
744 }
746 /*
747 * We may have to rev the inode as well as
748 * the superblock version number since projids didn't
749 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
750 */
753 }
757 }
760 /*
761 * Change file access or modified times.
762 */
769 }
775 }
778 }
780 /*
781 * Change XFS-added attributes.
782 */
785 /*
786 * Converting bytes to fs blocks.
787 */
790 }
792 uint di_flags;
794 /* can't set PREALLOC this way, just preserve it */
825 }
828 }
830 }
833 }
835 /*
836 * Change file inode change time only if XFS_AT_CTIME set
837 * AND we have been called by a DMI function.
838 */
845 }
847 /*
848 * Send out timestamp changes that need to be set to the
849 * current time. Not done when called by a DMI function.
850 */
856 /*
857 * If this is a synchronous mount, make sure that the
858 * transaction goes to disk before returning to the user.
859 * This is slightly sub-optimal in that truncates require
860 * two sync transactions instead of one for wsync filesystems.
861 * One for the truncate and one for the timestamps since we
862 * don't want to change the timestamps unless we're sure the
863 * truncate worked. Truncates are less than 1% of the laddis
864 * mix so this probably isn't worth the trouble to optimize.
865 */
872 }
874 /*
875 * If the (regular) file's mandatory locking mode changed, then
876 * notify the vnode. We do this under the inode lock to prevent
877 * racing calls to vop_vnode_change.
878 */
882 mandlock_after);
883 }
887 /*
888 * Release any dquot(s) the inode had kept before chown.
889 */
897 }
904 }
907 abort_return:
909 /* FALLTHROUGH */
910 error_return:
915 }
918 }
920 }
923 /*
924 * xfs_access
925 * Null conversion from vnode mode bits to inode mode bits, as in efs.
926 */
927 STATIC int
932 {
944 }
947 /*
948 * The maximum pathlen is 1024 bytes. Since the minimum file system
949 * blocksize is 512 bytes, we can get a max of 2 extents back from
950 * bmapi.
951 */
952 #define SYMLINK_MAPS 2
954 /*
955 * xfs_readlink
956 *
957 */
958 STATIC int
964 {
967 xfs_off_t offset;
974 xfs_daddr_t d;
998 }
1002 }
1004 /*
1005 * See if the symlink is stored inline.
1006 */
1011 }
1013 /*
1014 * Symlink not inline. Call bmap to get it in.
1015 */
1023 }
1036 }
1043 }
1045 }
1047 error_return:
1050 }
1053 /*
1054 * xfs_fsync
1055 *
1056 * This is called to sync the inode and its data out to disk.
1057 * We need to hold the I/O lock while flushing the data, and
1058 * the inode lock while flushing the inode. The inode lock CANNOT
1059 * be held while flushing the data, so acquire after we're done
1060 * with that.
1061 */
1062 STATIC int
1067 xfs_off_t start,
1068 xfs_off_t stop)
1069 {
1088 /*
1089 * We always need to make sure that the required inode state
1090 * is safe on disk. The vnode might be clean but because
1091 * of committed transactions that haven't hit the disk yet.
1092 * Likewise, there could be unflushed non-transactional
1093 * changes to the inode core that have to go to disk.
1094 *
1095 * The following code depends on one assumption: that
1096 * any transaction that changes an inode logs the core
1097 * because it has to change some field in the inode core
1098 * (typically nextents or nblocks). That assumption
1099 * implies that any transactions against an inode will
1100 * catch any non-transactional updates. If inode-altering
1101 * transactions exist that violate this assumption, the
1102 * code breaks. Right now, it figures that if the involved
1103 * update_* field is clear and the inode is unpinned, the
1104 * inode is clean. Either it's been flushed or it's been
1105 * committed and the commit has hit the disk unpinning the inode.
1106 * (Note that xfs_inode_item_format() called at commit clears
1107 * the update_* fields.)
1108 */
1111 /* If we are flushing data then we care about update_size
1112 * being set, otherwise we care about update_core
1113 */
1117 /*
1118 * Timestamps/size haven't changed since last inode
1119 * flush or inode transaction commit. That means
1120 * either nothing got written or a transaction
1121 * committed which caught the updates. If the
1122 * latter happened and the transaction hasn't
1123 * hit the disk yet, the inode will be still
1124 * be pinned. If it is, force the log.
1125 */
1131 XFS_LOG_FORCE |
1136 /*
1137 * If the inode is not pinned and nothing
1138 * has changed we don't need to flush the
1139 * cache.
1140 */
1142 }
1145 /*
1146 * Kick off a transaction to log the inode
1147 * core to get the updates. Make it
1148 * sync if FSYNC_WAIT is passed in (which
1149 * is done by everybody but specfs). The
1150 * sync transaction will also force the log.
1151 */
1159 }
1162 /*
1163 * Note - it's possible that we might have pushed
1164 * ourselves out of the way during trans_reserve
1165 * which would flush the inode. But there's no
1166 * guarantee that the inode buffer has actually
1167 * gone out yet (it's delwri). Plus the buffer
1168 * could be pinned anyway if it's part of an
1169 * inode in another recent transaction. So we
1170 * play it safe and fire off the transaction anyway.
1171 */
1180 }
1183 /*
1184 * If the log write didn't issue an ordered tag we need
1185 * to flush the disk cache for the data device now.
1186 */
1190 /*
1191 * If this inode is on the RT dev we need to flush that
1192 * cache as well.
1193 */
1196 }
1199 }
1201 /*
1202 * This is called by xfs_inactive to free any blocks beyond eof
1203 * when the link count isn't zero and by xfs_dm_punch_hole() when
1204 * punching a hole to EOF.
1205 */
1206 int
1211 {
1214 xfs_fileoff_t end_fsb;
1215 xfs_fileoff_t last_fsb;
1216 xfs_filblks_t map_len;
1218 xfs_bmbt_irec_t imap;
1221 /*
1222 * Figure out if there are any blocks beyond the end
1223 * of the file. If not, then there is nothing to do.
1224 */
1240 /*
1241 * Attach the dquots to the inode up front.
1242 */
1246 /*
1247 * There are blocks after the end of file.
1248 * Free them up now by truncating the file to
1249 * its current size.
1250 */
1253 /*
1254 * Do the xfs_itruncate_start() call before
1255 * reserving any log space because
1256 * itruncate_start will call into the buffer
1257 * cache and we can't
1258 * do that within a transaction.
1259 */
1269 }
1274 XFS_ITRUNCATE_LOG_COUNT);
1280 }
1284 XFS_IOLOCK_EXCL |
1285 XFS_ILOCK_EXCL);
1290 XFS_DATA_FORK,
1292 /*
1293 * If we get an error at this point we
1294 * simply don't bother truncating the file.
1295 */
1299 XFS_TRANS_ABORT));
1302 XFS_TRANS_RELEASE_LOG_RES);
1303 }
1306 }
1308 }
1310 /*
1311 * Free a symlink that has blocks associated with it.
1312 */
1313 STATIC int
1317 {
1322 xfs_fsblock_t first_block;
1323 xfs_bmap_free_t free_list;
1335 /*
1336 * We're freeing a symlink that has some
1337 * blocks allocated to it. Free the
1338 * blocks here. We know that we've got
1339 * either 1 or 2 extents and that we can
1340 * free them all in one bunmapi call.
1341 */
1349 }
1350 /*
1351 * Lock the inode, fix the size, and join it to the transaction.
1352 * Hold it so in the normal path, we still have it locked for
1353 * the second transaction. In the error paths we need it
1354 * held so the cancel won't rele it, see below.
1355 */
1362 /*
1363 * Find the block(s) so we can inval and unmap them.
1364 */
1372 /*
1373 * Invalidate the block(s).
1374 */
1380 }
1381 /*
1382 * Unmap the dead block(s) to the free_list.
1383 */
1388 /*
1389 * Commit the first transaction. This logs the EFI and the inode.
1390 */
1393 /*
1394 * The transaction must have been committed, since there were
1395 * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
1396 * The new tp has the extent freeing and EFDs.
1397 */
1399 /*
1400 * The first xact was committed, so add the inode to the new one.
1401 * Mark it dirty so it will be logged and moved forward in the log as
1402 * part of every commit.
1403 */
1407 /*
1408 * Get a new, empty transaction to return to our caller.
1409 */
1411 /*
1412 * Commit the transaction containing extent freeing and EFDs.
1413 * If we get an error on the commit here or on the reserve below,
1414 * we need to unlock the inode since the new transaction doesn't
1415 * have the inode attached.
1416 */
1422 }
1423 /*
1424 * Remove the memory for extent descriptions (just bookkeeping).
1425 */
1429 /*
1430 * Put an itruncate log reservation in the new transaction
1431 * for our caller.
1432 */
1437 }
1438 /*
1439 * Return with the inode locked but not joined to the transaction.
1440 */
1444 error1:
1446 error0:
1447 /*
1448 * Have to come here with the inode locked and either
1449 * (held and in the transaction) or (not in the transaction).
1450 * If the inode isn't held then cancel would iput it, but
1451 * that's wrong since this is inactive and the vnode ref
1452 * count is 0 already.
1453 * Cancel won't do anything to the inode if held, but it still
1454 * needs to be locked until the cancel is done, if it was
1455 * joined to the transaction.
1456 */
1462 }
1464 STATIC int
1468 {
1472 /*
1473 * We're freeing a symlink which fit into
1474 * the inode. Just free the memory used
1475 * to hold the old symlink.
1476 */
1480 XFS_ITRUNCATE_LOG_COUNT);
1486 }
1489 /*
1490 * Zero length symlinks _can_ exist.
1491 */
1495 XFS_DATA_FORK);
1497 }
1499 }
1501 STATIC int
1505 {
1522 }
1528 XFS_INACTIVE_LOG_COUNT);
1535 }
1546 }
1548 STATIC int
1551 {
1564 /* If this is a read-only mount, don't do this (would generate I/O) */
1569 /*
1570 * If we are using filestreams, and we have an unlinked
1571 * file that we are processing the last close on, then nothing
1572 * will be able to reopen and write to this file. Purge this
1573 * inode from the filestreams cache so that it doesn't delay
1574 * teardown of the inode.
1575 */
1579 /*
1580 * If we previously truncated this file and removed old data
1581 * in the process, we want to initiate "early" writeout on
1582 * the last close. This is an attempt to combat the notorious
1583 * NULL files problem which is particularly noticable from a
1584 * truncate down, buffered (re-)write (delalloc), followed by
1585 * a crash. What we are effectively doing here is
1586 * significantly reducing the time window where we'd otherwise
1587 * be exposed to that problem.
1588 */
1591 }
1593 #ifdef HAVE_REFCACHE
1594 /* If we are in the NFS reference cache then don't do this now */
1597 #endif
1609 /* Update linux inode block count after free above */
1612 }
1613 }
1616 }
1618 /*
1619 * xfs_inactive
1620 *
1621 * This is called when the vnode reference count for the vnode
1622 * goes to zero. If the file has been unlinked, then it must
1623 * now be truncated. Also, we clear all of the read-ahead state
1624 * kept for the inode here since the file is now closed.
1625 */
1626 STATIC int
1630 {
1633 xfs_bmap_free_t free_list;
1634 xfs_fsblock_t first_block;
1646 /*
1647 * If the inode is already free, then there can be nothing
1648 * to clean up here.
1649 */
1654 }
1656 /*
1657 * Only do a truncate if it's a regular file with
1658 * some actual space in it. It's OK to look at the
1659 * inode's fields without the lock because we're the
1660 * only one with a reference to the inode.
1661 */
1672 }
1676 /* If this is a read-only mount, don't do this (would generate I/O) */
1691 /* Update linux inode block count after free above */
1694 }
1696 }
1705 /*
1706 * Do the xfs_itruncate_start() call before
1707 * reserving any log space because itruncate_start
1708 * will call into the buffer cache and we can't
1709 * do that within a transaction.
1710 */
1718 }
1723 XFS_ITRUNCATE_LOG_COUNT);
1725 /* Don't call itruncate_cleanup */
1730 }
1736 /*
1737 * normally, we have to run xfs_itruncate_finish sync.
1738 * But if filesystem is wsync and we're in the inactive
1739 * path, then we know that nlink == 0, and that the
1740 * xaction that made nlink == 0 is permanently committed
1741 * since xfs_remove runs as a synchronous transaction.
1742 */
1751 }
1754 /*
1755 * If we get an error while cleaning up a
1756 * symlink we bail out.
1757 */
1765 }
1773 XFS_INACTIVE_LOG_COUNT);
1778 }
1783 }
1785 /*
1786 * If there are attributes associated with the file
1787 * then blow them away now. The code calls a routine
1788 * that recursively deconstructs the attribute fork.
1789 * We need to just commit the current transaction
1790 * because we can't use it for xfs_attr_inactive().
1791 */
1794 /*
1795 * If we got an error, the transaction is already
1796 * cancelled, and the inode is unlocked. Just get out.
1797 */
1802 }
1804 /*
1805 * Free the inode.
1806 */
1810 /*
1811 * If we fail to free the inode, shut down. The cancel
1812 * might do that, we need to make sure. Otherwise the
1813 * inode might be lost for a long time or forever.
1814 */
1820 }
1823 /*
1824 * Credit the quota account(s). The inode is gone.
1825 */
1828 /*
1829 * Just ignore errors at this point. There is
1830 * nothing we can do except to try to keep going.
1831 */
1834 }
1835 /*
1836 * Release the dquots held by inode, if any.
1837 */
1842 out:
1844 }
1847 /*
1848 * xfs_lookup
1849 */
1850 STATIC int
1858 {
1860 xfs_ino_t e_inum;
1862 uint lock_mode;
1878 }
1881 }
1884 /*
1885 * xfs_create (create a new file).
1886 */
1887 STATIC int
1894 {
1901 xfs_dev_t rdev;
1903 xfs_bmap_free_t free_list;
1904 xfs_fsblock_t first_block;
1905 boolean_t dp_joined_to_trans;
1907 uint cancel_flags;
1909 xfs_prid_t prid;
1911 uint resblks;
1934 }
1939 /* Return through std_return after this point. */
1946 else
1949 /*
1950 * Make sure that we have allocated dquot(s) on disk.
1951 */
1964 /*
1965 * Initially assume that the file does not exist and
1966 * reserve the resources for that case. If that is not
1967 * the case we'll drop the one we have and get a more
1968 * appropriate transaction later.
1969 */
1976 }
1981 }
1989 /*
1990 * Reserve disk quota and the inode.
1991 */
2006 }
2009 /*
2010 * At this point, we've gotten a newly allocated inode.
2011 * It is locked (and joined to the transaction).
2012 */
2016 /*
2017 * Now we join the directory inode to the transaction.
2018 * We do not do it earlier because xfs_dir_ialloc
2019 * might commit the previous transaction (and release
2020 * all the locks).
2021 */
2033 }
2037 /*
2038 * If this is a synchronous mount, make sure that the
2039 * create transaction goes to disk before returning to
2040 * the user.
2041 */
2044 }
2048 /*
2049 * Attach the dquot(s) to the inodes and modify them incore.
2050 * These ids of the inode couldn't have changed since the new
2051 * inode has been locked ever since it was created.
2052 */
2055 /*
2056 * xfs_trans_commit normally decrements the vnode ref count
2057 * when it unlocks the inode. Since we want to return the
2058 * vnode to the caller, we bump the vnode ref count now.
2059 */
2067 }
2074 }
2079 /*
2080 * Propagate the fact that the vnode changed after the
2081 * xfs_inode locks have been released.
2082 */
2087 /* Fallthrough to std_return with error = 0 */
2089 std_return:
2092 DM_EVENT_POSTCREATE)) {
2098 }
2101 abort_return:
2103 /* FALLTHROUGH */
2105 error_return:
2116 abort_rele:
2117 /*
2118 * Wait until after the current transaction is aborted to
2119 * release the inode. This prevents recursive transactions
2120 * and deadlocks from xfs_inactive.
2121 */
2130 }
2132 #ifdef DEBUG
2133 /*
2134 * Some counters to see if (and how often) we are hitting some deadlock
2135 * prevention code paths.
2136 */
2141 #endif
2143 /*
2144 * The following routine will lock the inodes associated with the
2145 * directory and the named entry in the directory. The locks are
2146 * acquired in increasing inode number.
2147 *
2148 * If the entry is "..", then only the directory is locked. The
2149 * vnode ref count will still include that from the .. entry in
2150 * this case.
2151 *
2152 * There is a deadlock we need to worry about. If the locked directory is
2153 * in the AIL, it might be blocking up the log. The next inode we lock
2154 * could be already locked by another thread waiting for log space (e.g
2155 * a permanent log reservation with a long running transaction (see
2156 * xfs_itruncate_finish)). To solve this, we must check if the directory
2157 * is in the ail and use lock_nowait. If we can't lock, we need to
2158 * drop the inode lock on the directory and try again. xfs_iunlock will
2159 * potentially push the tail if we were holding up the log.
2160 */
2161 STATIC int
2165 {
2167 xfs_ino_t e_inum;
2171 #ifdef DEBUG
2172 xfs_rm_locks++;
2173 #endif
2176 again:
2183 /*
2184 * We want to lock in increasing inum. Since we've already
2185 * acquired the lock on the directory, we may need to release
2186 * if if the inum of the entry turns out to be less.
2187 */
2189 /*
2190 * We are already in the right order, so just
2191 * lock on the inode of the entry.
2192 * We need to use nowait if dp is in the AIL.
2193 */
2198 attempts++;
2199 #ifdef DEBUG
2200 xfs_rm_attempts++;
2201 #endif
2203 /*
2204 * Unlock dp and try again.
2205 * xfs_iunlock will try to push the tail
2206 * if the inode is in the AIL.
2207 */
2213 #ifdef DEBUG
2214 xfs_rm_lock_delays++;
2215 #endif
2216 }
2218 }
2221 }
2228 }
2229 /* else e_inum == dp->i_ino */
2230 /* This can happen if we're asked to lock /x/..
2231 * the entry is "..", which is also the parent directory.
2232 */
2235 }
2237 #ifdef DEBUG
2243 #endif
2245 /*
2246 * Bump the subclass so xfs_lock_inodes() acquires each lock with
2247 * a different value
2248 */
2251 {
2258 }
2260 /*
2261 * The following routine will lock n inodes in exclusive mode.
2262 * We assume the caller calls us with the inodes in i_ino order.
2263 *
2264 * We need to detect deadlock where an inode that we lock
2265 * is in the AIL and we start waiting for another inode that is locked
2266 * by a thread in a long running transaction (such as truncate). This can
2267 * result in deadlock since the long running trans might need to wait
2268 * for the inode we just locked in order to push the tail and free space
2269 * in the log.
2270 */
2271 void
2276 uint lock_mode)
2277 {
2289 }
2291 again:
2298 /*
2299 * If try_lock is not set yet, make sure all locked inodes
2300 * are not in the AIL.
2301 * If any are, set try_lock to be used later.
2302 */
2308 try_lock++;
2309 }
2310 }
2311 }
2313 /*
2314 * If any of the previous locks we have locked is in the AIL,
2315 * we must TRY to get the second and subsequent locks. If
2316 * we can't get any, we must release all we have
2317 * and try again.
2318 */
2321 /* try_lock must be 0 if i is 0. */
2322 /*
2323 * try_lock means we have an inode locked
2324 * that is in the AIL.
2325 */
2328 attempts++;
2330 /*
2331 * Unlock all previous guys and try again.
2332 * xfs_iunlock will try to push the tail
2333 * if the inode is in the AIL.
2334 */
2338 /*
2339 * Check to see if we've already
2340 * unlocked this one.
2341 * Not the first one going back,
2342 * and the inode ptr is the same.
2343 */
2349 }
2353 #ifdef DEBUG
2354 xfs_lock_delays++;
2355 #endif
2356 }
2360 }
2363 }
2364 }
2366 #ifdef DEBUG
2372 xfs_locked_n++;
2373 }
2374 #endif
2375 }
2377 #ifdef DEBUG
2378 #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);}
2381 #define REMOVE_DEBUG_TRACE(x)
2385 /*
2386 * xfs_remove
2387 *
2388 */
2389 STATIC int
2394 {
2401 xfs_bmap_free_t free_list;
2402 xfs_fsblock_t first_block;
2407 uint resblks;
2424 }
2432 }
2434 /* From this point on, return through std_return */
2437 /*
2438 * We need to get a reference to ip before we get our log
2439 * reservation. The reason for this is that we cannot call
2440 * xfs_iget for an inode for which we do not have a reference
2441 * once we've acquired a log reservation. This is because the
2442 * inode we are trying to get might be in xfs_inactive going
2443 * for a log reservation. Since we'll have to wait for the
2444 * inactive code to complete before returning from xfs_iget,
2445 * we need to make sure that we don't have log space reserved
2446 * when we call xfs_iget. Instead we get an unlocked reference
2447 * to the inode before getting our log reservation.
2448 */
2453 }
2468 }
2472 /*
2473 * We try to get the real space reservation first,
2474 * allowing for directory btree deletion(s) implying
2475 * possible bmap insert(s). If we can't get the space
2476 * reservation then we use 0 instead, and avoid the bmap
2477 * btree insert(s) in the directory code by, if the bmap
2478 * insert tries to happen, instead trimming the LAST
2479 * block from the directory.
2480 */
2488 }
2495 }
2503 }
2505 /*
2506 * At this point, we've gotten both the directory and the entry
2507 * inodes locked.
2508 */
2511 /*
2512 * Increment vnode ref count only in this case since
2513 * there's an extra vnode reference in the case where
2514 * dp == ip.
2515 */
2518 }
2520 /*
2521 * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
2522 */
2530 }
2540 }
2542 /* Determine if this is the last link while
2543 * we are in the transaction.
2544 */
2547 /*
2548 * Take an extra ref on the inode so that it doesn't
2549 * go to xfs_inactive() from within the commit.
2550 */
2553 /*
2554 * If this is a synchronous mount, make sure that the
2555 * remove transaction goes to disk before returning to
2556 * the user.
2557 */
2560 }
2566 }
2572 }
2574 /*
2575 * Before we drop our extra reference to the inode, purge it
2576 * from the refcache if it is there. By waiting until afterwards
2577 * to do the IRELE, we ensure that we won't go inactive in the
2578 * xfs_refcache_purge_ip routine (although that would be OK).
2579 */
2582 /*
2583 * If we are using filestreams, kill the stream association.
2584 * If the file is still open it may get a new one but that
2585 * will get killed on last close in xfs_close() so we don't
2586 * have to worry about that.
2587 */
2593 /*
2594 * Let interposed file systems know about removed links.
2595 */
2600 /* Fall through to std_return with error = 0 */
2601 std_return:
2603 DM_EVENT_POSTREMOVE)) {
2608 }
2611 error1:
2617 error_rele:
2618 /*
2619 * In this case make sure to not release the inode until after
2620 * the current transaction is aborted. Releasing it beforehand
2621 * can cause us to go to xfs_inactive and start a recursive
2622 * transaction which can easily deadlock with the current one.
2623 */
2628 /*
2629 * Before we drop our extra reference to the inode, purge it
2630 * from the refcache if it is there. By waiting until afterwards
2631 * to do the IRELE, we ensure that we won't go inactive in the
2632 * xfs_refcache_purge_ip routine (although that would be OK).
2633 */
2639 }
2642 /*
2643 * xfs_link
2644 *
2645 */
2646 STATIC int
2652 {
2658 xfs_bmap_free_t free_list;
2659 xfs_fsblock_t first_block;
2687 }
2689 /* Return through std_return after this point. */
2706 }
2710 }
2718 }
2722 /*
2723 * Increment vnode ref counts since xfs_trans_commit &
2724 * xfs_trans_cancel will both unlock the inodes and
2725 * decrement the associated ref counts.
2726 */
2732 /*
2733 * If the source has too many links, we can't make any more to it.
2734 */
2738 }
2740 /*
2741 * If we are using project inheritance, we only allow hard link
2742 * creation in our tree when the project IDs are the same; else
2743 * the tree quota mechanism could be circumvented.
2744 */
2749 }
2759 resblks);
2770 /*
2771 * If this is a synchronous mount, make sure that the
2772 * link transaction goes to disk before returning to
2773 * the user.
2774 */
2777 }
2783 }
2789 /* Fall through to std_return with error = 0. */
2790 std_return:
2792 DM_EVENT_POSTLINK)) {
2797 }
2800 abort_return:
2802 /* FALLTHROUGH */
2804 error_return:
2807 }
2810 /*
2811 * xfs_mkdir
2812 *
2813 */
2814 STATIC int
2821 {
2831 xfs_bmap_free_t free_list;
2832 xfs_fsblock_t first_block;
2834 boolean_t dp_joined_to_trans;
2837 xfs_prid_t prid;
2839 uint resblks;
2864 }
2866 /* Return through std_return after this point. */
2876 else
2879 /*
2880 * Make sure that we have allocated dquot(s) on disk.
2881 */
2896 XFS_TRANS_PERM_LOG_RES,
2897 XFS_MKDIR_LOG_COUNT);
2898 }
2903 }
2907 /*
2908 * Check for directory link count overflow.
2909 */
2913 }
2915 /*
2916 * Reserve disk quota and the inode.
2917 */
2925 /*
2926 * create the directory inode.
2927 */
2935 }
2938 /*
2939 * Now we add the directory inode to the transaction.
2940 * We waited until now since xfs_dir_ialloc might start
2941 * a new transaction. Had we joined the transaction
2942 * earlier, the locks might have gotten released.
2943 */
2956 }
2959 /*
2960 * Bump the in memory version number of the parent directory
2961 * so that other processes accessing it will recognize that
2962 * the directory has changed.
2963 */
2982 /*
2983 * Attach the dquots to the new inode and modify the icount incore.
2984 */
2987 /*
2988 * If this is a synchronous mount, make sure that the
2989 * mkdir transaction goes to disk before returning to
2990 * the user.
2991 */
2994 }
3000 }
3007 }
3009 /* Fall through to std_return with error = 0 or errno from
3010 * xfs_trans_commit. */
3012 std_return:
3015 DM_EVENT_POSTCREATE)) {
3019 DM_RIGHT_NULL,
3022 }
3025 error2:
3026 error1:
3028 abort_return:
3030 error_return:
3037 }
3040 }
3043 /*
3044 * xfs_rmdir
3045 *
3046 */
3047 STATIC int
3052 {
3059 xfs_bmap_free_t free_list;
3060 xfs_fsblock_t first_block;
3067 uint resblks;
3082 }
3091 }
3093 /* Return through std_return after this point. */
3097 /*
3098 * We need to get a reference to cdp before we get our log
3099 * reservation. The reason for this is that we cannot call
3100 * xfs_iget for an inode for which we do not have a reference
3101 * once we've acquired a log reservation. This is because the
3102 * inode we are trying to get might be in xfs_inactive going
3103 * for a log reservation. Since we'll have to wait for the
3104 * inactive code to complete before returning from xfs_iget,
3105 * we need to make sure that we don't have log space reserved
3106 * when we call xfs_iget. Instead we get an unlocked reference
3107 * to the inode before getting our log reservation.
3108 */
3113 }
3117 /*
3118 * Get the dquots for the inodes.
3119 */
3127 }
3131 /*
3132 * We try to get the real space reservation first,
3133 * allowing for directory btree deletion(s) implying
3134 * possible bmap insert(s). If we can't get the space
3135 * reservation then we use 0 instead, and avoid the bmap
3136 * btree insert(s) in the directory code by, if the bmap
3137 * insert tries to happen, instead trimming the LAST
3138 * block from the directory.
3139 */
3147 }
3153 }
3156 /*
3157 * Now lock the child directory inode and the parent directory
3158 * inode in the proper order. This will take care of validating
3159 * that the directory entry for the child directory inode has
3160 * not changed while we were obtaining a log reservation.
3161 */
3167 }
3171 /*
3172 * Only increment the parent directory vnode count if
3173 * we didn't bump it in looking up cdp. The only time
3174 * we don't bump it is when we're looking up ".".
3175 */
3177 }
3186 }
3190 }
3199 /*
3200 * Bump the in memory generation count on the parent
3201 * directory so that other can know that it has changed.
3202 */
3205 /*
3206 * Drop the link from cdp's "..".
3207 */
3211 }
3213 /*
3214 * Drop the link from dp to cdp.
3215 */
3219 }
3221 /*
3222 * Drop the "." link from cdp to self.
3223 */
3227 }
3229 /* Determine these before committing transaction */
3232 /*
3233 * Take an extra ref on the child vnode so that it
3234 * does not go to xfs_inactive() from within the commit.
3235 */
3238 /*
3239 * If this is a synchronous mount, make sure that the
3240 * rmdir transaction goes to disk before returning to
3241 * the user.
3242 */
3245 }
3251 XFS_TRANS_ABORT));
3254 }
3260 }
3263 /*
3264 * Let interposed file systems know about removed links.
3265 */
3270 /* Fall through to std_return with error = 0 or the errno
3271 * from xfs_trans_commit. */
3272 std_return:
3279 }
3282 error1:
3285 /* FALLTHROUGH */
3287 error_return:
3290 }
3293 /*
3294 * Read dp's entries starting at uiop->uio_offset and translate them into
3295 * bufsize bytes worth of struct dirents starting at bufbase.
3296 */
3297 STATIC int
3303 {
3307 uint lock_mode;
3320 }
3323 STATIC int
3331 {
3338 xfs_bmap_free_t free_list;
3339 xfs_fsblock_t first_block;
3340 boolean_t dp_joined_to_trans;
3342 uint cancel_flags;
3344 xfs_fileoff_t first_fsb;
3345 xfs_filblks_t fs_blocks;
3348 xfs_daddr_t d;
3353 xfs_prid_t prid;
3355 uint resblks;
3376 /*
3377 * Check component lengths of the target path name.
3378 */
3387 /*
3388 * Skip any slashes.
3389 */
3391 total++;
3392 path++;
3393 }
3395 /*
3396 * Count up to the next slash or end of path.
3397 * Error out if the component is bigger than MAXNAMELEN.
3398 */
3403 }
3404 }
3405 }
3406 }
3414 }
3416 /* Return through std_return after this point. */
3423 else
3426 /*
3427 * Make sure that we have allocated dquot(s) on disk.
3428 */
3437 /*
3438 * The symlink will fit into the inode data fork?
3439 * There can't be any attributes so we get the whole variable part.
3440 */
3443 else
3452 }
3457 }
3461 /*
3462 * Check whether the directory allows new symlinks or not.
3463 */
3467 }
3469 /*
3470 * Reserve disk quota : blocks and inode.
3471 */
3476 /*
3477 * Check for ability to enter directory entry, if no space reserved.
3478 */
3482 /*
3483 * Initialize the bmap freelist prior to calling either
3484 * bmapi or the directory create code.
3485 */
3488 /*
3489 * Allocate an inode for the symlink.
3490 */
3497 }
3504 /*
3505 * Also attach the dquot(s) to it, if applicable.
3506 */
3511 /*
3512 * If the symlink will fit into the inode, write it inline.
3513 */
3519 /*
3520 * The inode was initially created in extent format.
3521 */
3538 }
3554 }
3561 }
3562 }
3564 /*
3565 * Create the directory entry for the symlink.
3566 */
3574 /*
3575 * Bump the in memory version number of the parent directory
3576 * so that other processes accessing it will recognize that
3577 * the directory has changed.
3578 */
3581 /*
3582 * If this is a synchronous mount, make sure that the
3583 * symlink transaction goes to disk before returning to
3584 * the user.
3585 */
3588 }
3590 /*
3591 * xfs_trans_commit normally decrements the vnode ref count
3592 * when it unlocks the inode. Since we want to return the
3593 * vnode to the caller, we bump the vnode ref count now.
3594 */
3600 }
3605 /* Fall through to std_return with error = 0 or errno from
3606 * xfs_trans_commit */
3607 std_return:
3609 DM_EVENT_POSTSYMLINK)) {
3615 }
3623 }
3626 error2:
3628 error1:
3631 error_return:
3638 }
3641 }
3644 /*
3645 * xfs_fid2
3646 *
3647 * A fid routine that takes a pointer to a previously allocated
3648 * fid structure (like xfs_fast_fid) but uses a 64 bit inode number.
3649 */
3650 STATIC int
3654 {
3666 /*
3667 * use memcpy because the inode is a long long and there's no
3668 * assurance that xfid->fid_ino is properly aligned.
3669 */
3674 }
3677 /*
3678 * xfs_rwlock
3679 */
3680 int
3683 bhv_vrwlock_t locktype)
3684 {
3702 }
3705 }
3708 /*
3709 * xfs_rwunlock
3710 */
3711 void
3714 bhv_vrwlock_t locktype)
3715 {
3724 /*
3725 * In the write case, we may have added a new entry to
3726 * the reference cache. This might store a pointer to
3727 * an inode to be released in this inode. If it is there,
3728 * clear the pointer and release the inode after unlocking
3729 * this one.
3730 */
3736 }
3738 }
3740 STATIC int
3744 {
3757 /*
3758 * Bypass inodes which have already been cleaned by
3759 * the inode flush clustering code inside xfs_iflush
3760 */
3768 xfs_lsn_t sync_lsn;
3781 }
3785 }
3786 }
3788 /*
3789 * We make this non-blocking if the inode is contended,
3790 * return EAGAIN to indicate to the caller that they
3791 * did not succeed. This prevents the flush path from
3792 * blocking on inodes inside another operation right
3793 * now, they get caught later by xfs_sync.
3794 */
3805 }
3808 }
3812 else
3817 }
3820 }
3822 int
3825 u_int evmask,
3826 u_int16_t state,
3828 {
3848 }
3860 }
3862 STATIC int
3865 {
3876 /* bad inode, get out here ASAP */
3880 }
3886 /*
3887 * Make sure the atime in the XFS inode is correct before freeing the
3888 * Linux inode.
3889 */
3892 /*
3893 * If we have nothing to flush with this inode then complete the
3894 * teardown now, otherwise break the link between the xfs inode and the
3895 * linux inode and clean up the xfs inode later. This avoids flushing
3896 * the inode to disk during the delete operation itself.
3897 *
3898 * When breaking the link, we need to set the XFS_IRECLAIMABLE flag
3899 * first to ensure that xfs_iunpin() will never see an xfs inode
3900 * that has a linux inode being reclaimed. Synchronisation is provided
3901 * by the i_flags_lock.
3902 */
3910 /* Protect sync and unpin from us */
3918 }
3920 }
3922 int
3927 {
3935 /* The hash lock here protects a thread in xfs_iget_core from
3936 * racing with us on linking the inode back with a vnode.
3937 * Once we have the XFS_IRECLAIM flag set it will not touch
3938 * us.
3939 */
3949 }
3951 }
3956 /*
3957 * If the inode is still dirty, then flush it out. If the inode
3958 * is not in the AIL, then it will be OK to flush it delwri as
3959 * long as xfs_iflush() does not keep any references to the inode.
3960 * We leave that decision up to xfs_iflush() since it has the
3961 * knowledge of whether it's OK to simply do a delwri flush of
3962 * the inode or whether we need to wait until the inode is
3963 * pulled from the AIL.
3964 * We get the flush lock regardless, though, just to make sure
3965 * we don't free it while it is being flushed.
3966 */
3971 }
3977 /*
3978 * If we hit an error, typically because of filesystem
3979 * shutdown, we don't need to let vn_reclaim to know
3980 * because we're gonna reclaim the inode anyway.
3981 */
3985 }
3987 }
3994 /*
3995 * We are not interested in doing an iflush if we're
3996 * in the process of shutting down the filesystem forcibly.
3997 * So, just reclaim the inode.
3998 */
4001 }
4003 reclaim:
4006 }
4008 int
4010 {
4026 }
4027 }
4030 XFS_IFLUSH_DELWRI_ELSE_ASYNC))
4034 }
4037 }
4041 }
4043 /*
4044 * xfs_alloc_file_space()
4045 * This routine allocates disk space for the given file.
4046 *
4047 * If alloc_type == 0, this request is for an ALLOCSP type
4048 * request which will change the file size. In this case, no
4049 * DMAPI event will be generated by the call. A TRUNCATE event
4050 * will be generated later by xfs_setattr.
4051 *
4052 * If alloc_type != 0, this request is for a RESVSP type
4053 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
4054 * lower block boundary byte address is less than the file's
4055 * length.
4056 *
4057 * RETURNS:
4058 * 0 on success
4059 * errno on error
4060 *
4061 */
4062 STATIC int
4065 xfs_off_t offset,
4066 xfs_off_t len,
4069 {
4071 xfs_off_t count;
4072 xfs_filblks_t allocated_fsb;
4073 xfs_filblks_t allocatesize_fsb;
4075 xfs_fileoff_t startoffset_fsb;
4076 xfs_fsblock_t firstfsb;
4083 xfs_bmap_free_t free_list;
4109 /* Generate a DMAPI event if needed. */
4113 xfs_off_t end_dmi_offset;
4123 }
4125 /*
4126 * Allocate file space until done or until there is an error
4127 */
4128 retry:
4132 /*
4133 * Determine space reservations for data/realtime.
4134 */
4147 }
4159 }
4161 /*
4162 * Allocate and setup the transaction.
4163 */
4167 XFS_TRANS_PERM_LOG_RES,
4168 XFS_WRITE_LOG_COUNT);
4169 /*
4170 * Check for running out of space
4171 */
4173 /*
4174 * Free the transaction structure.
4175 */
4179 }
4189 /*
4190 * Issue the xfs_bmapi() call to allocate the blocks
4191 */
4199 }
4201 /*
4202 * Complete the transaction
4203 */
4207 }
4213 }
4220 }
4224 }
4225 dmapi_enospc_check:
4235 /* else fall through with error from XFS_SEND_DATA */
4236 }
4248 }
4250 /*
4251 * Zero file bytes between startoff and endoff inclusive.
4252 * The iolock is held exclusive and no blocks are buffered.
4253 */
4254 STATIC int
4257 xfs_off_t startoff,
4258 xfs_off_t endoff)
4259 {
4260 xfs_bmbt_irec_t imap;
4261 xfs_fileoff_t offset_fsb;
4262 xfs_off_t lastoffset;
4263 xfs_off_t offset;
4299 }
4311 }
4312 }
4315 }
4317 /*
4318 * xfs_free_file_space()
4319 * This routine frees disk space for the given file.
4320 *
4321 * This routine is only called by xfs_change_file_space
4322 * for an UNRESVSP type call.
4323 *
4324 * RETURNS:
4325 * 0 on success
4326 * errno on error
4327 *
4328 */
4329 STATIC int
4332 xfs_off_t offset,
4333 xfs_off_t len,
4335 {
4339 xfs_off_t end_dmi_offset;
4340 xfs_fileoff_t endoffset_fsb;
4342 xfs_fsblock_t firstfsb;
4343 xfs_bmap_free_t free_list;
4344 xfs_bmbt_irec_t imap;
4345 xfs_off_t ioffset;
4349 uint resblks;
4350 uint rounding;
4352 xfs_fileoff_t startoffset_fsb;
4382 }
4389 }
4401 }
4403 /*
4404 * Need to zero the stuff we're not freeing, on disk.
4405 * If its a realtime file & can't use unwritten extents then we
4406 * actually need to zero the extent edges. Otherwise xfs_bunmapi
4407 * will take care of it for us.
4408 */
4417 xfs_daddr_t block;
4424 }
4433 mod++;
4436 }
4437 }
4439 /*
4440 * One contiguous piece to clear
4441 */
4444 /*
4445 * Some full blocks, possibly two pieces to clear
4446 */
4455 }
4457 /*
4458 * free file space until done or until there is an error
4459 */
4463 /*
4464 * allocate and setup the transaction. Allow this
4465 * transaction to dip into the reserve blocks to ensure
4466 * the freeing of the space succeeds at ENOSPC.
4467 */
4471 resblks,
4474 XFS_TRANS_PERM_LOG_RES,
4475 XFS_WRITE_LOG_COUNT);
4477 /*
4478 * check for running out of space
4479 */
4481 /*
4482 * Free the transaction structure.
4483 */
4487 }
4491 XFS_QMOPT_RES_REGBLKS);
4498 /*
4499 * issue the bunmapi() call to free the blocks
4500 */
4507 }
4509 /*
4510 * complete the transaction
4511 */
4515 }
4519 }
4521 out_unlock_iolock:
4526 error0:
4528 error1:
4531 XFS_ILOCK_EXCL);
4533 }
4535 /*
4536 * xfs_change_file_space()
4537 * This routine allocates or frees disk space for the given file.
4538 * The user specified parameters are checked for alignment and size
4539 * limitations.
4540 *
4541 * RETURNS:
4542 * 0 on success
4543 * errno on error
4544 *
4545 */
4546 int
4551 xfs_off_t offset,
4554 {
4557 xfs_fsize_t fsize;
4561 xfs_off_t startoffset;
4562 xfs_off_t llen;
4564 bhv_vattr_t va;
4573 /*
4574 * must be a regular file and have write permission
4575 */
4584 }
4599 }
4614 /*
4615 * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
4616 * file space.
4617 * These calls do NOT zero the data space allocated to the file,
4618 * nor do they change the file size.
4619 *
4620 * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
4621 * space.
4622 * These calls cause the new file data to be zeroed and the file
4623 * size to be changed.
4624 */
4640 attr_flags)))
4653 }
4669 }
4671 /*
4672 * update the inode timestamp, mode, and prealloc flag bits
4673 */
4678 /* ASSERT(0); */
4681 }
4691 /*
4692 * Note that we don't have to worry about mandatory
4693 * file locking being disabled here because we only
4694 * clear the S_ISGID bit if the Group execute bit is
4695 * on, but if it was on then mandatory locking wouldn't
4696 * have been enabled.
4697 */
4702 }
4716 }
4718 bhv_vnodeops_t xfs_vnodeops = {
4722 #ifdef HAVE_SPLICE
4725 #endif
4759 };