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xfs: disable noattr2/attr2 mount options for CRC enabled filesystems

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attr2 format is always enabled for v5 superblock filesystems, so the
mount options to enable or disable it need to be cause mount errors.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

(cherry picked from commit d3eaace84e)
This commit is contained in:
Dave Chinner 2013-06-05 12:09:09 +10:00 committed by Ben Myers
parent ad868afddb
commit f763fd440e
2 changed files with 14 additions and 0 deletions
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3
Documentation/filesystems/xfs.txt
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@ -33,6 +33,9 @@ When mounting an XFS filesystem, the following options are accepted.
removing extended attributes) the on-disk superblock feature
bit field will be updated to reflect this format being in use.
CRC enabled filesystems always use the attr2 format, and so
will reject the noattr2 mount option if it is set.
barrier
Enables the use of block layer write barriers for writes into
the journal and unwritten extent conversion. This allows for

11
fs/xfs/xfs_super.c
View File

@ -1372,6 +1372,17 @@ xfs_finish_flags(
}
}
/*
* V5 filesystems always use attr2 format for attributes.
*/
if (xfs_sb_version_hascrc(&mp->m_sb) &&
(mp->m_flags & XFS_MOUNT_NOATTR2)) {
xfs_warn(mp,
"Cannot mount a V5 filesystem as %s. %s is always enabled for V5 filesystems.",
MNTOPT_NOATTR2, MNTOPT_ATTR2);
return XFS_ERROR(EINVAL);
}
/*
* mkfs'ed attr2 will turn on attr2 mount unless explicitly
* told by noattr2 to turn it off