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MFC r262812

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- Gracefully handle truncation failures when trying to shrink directories.
  This could cause dirhash panics since the dirhash state would be
  successfully truncated while the directory was not.

Submitted by:   jeffr
This commit is contained in:
scottl 2014-04-15 07:50:18 +00:00
parent ed992167df
commit c804ca5e78
1 changed files with 6 additions and 3 deletions
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9
sys/ufs/ufs/ufs_lookup.c
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@ -1130,12 +1130,15 @@ ufs_direnter(dvp, tvp, dirp, cnp, newdirbp, isrename)
dp->i_endoff && dp->i_endoff < dp->i_size) {
if (tvp != NULL)
VOP_UNLOCK(tvp, 0);
error = UFS_TRUNCATE(dvp, (off_t)dp->i_endoff,
IO_NORMAL | IO_SYNC, cr);
if (error != 0)
vprint("ufs_direnter: failted to truncate", dvp);
#ifdef UFS_DIRHASH
if (dp->i_dirhash != NULL)
if (error == 0 && dp->i_dirhash != NULL)
ufsdirhash_dirtrunc(dp, dp->i_endoff);
#endif
(void) UFS_TRUNCATE(dvp, (off_t)dp->i_endoff,
IO_NORMAL | IO_SYNC, cr);
error = 0;
if (tvp != NULL)
vn_lock(tvp, LK_EXCLUSIVE | LK_RETRY);
}