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xfs: disallow mounting of realtime + rmap filesystems

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Since the kernel doesn't currently support the realtime rmapbt,
don't allow such filesystems to be mounted.  Support will appear
in a future release.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong
2016-08-26 15:59:19 +10:00
committed by Dave Chinner
parent ed150e1a5c
commit 738f57c16a
1 changed files with 8 additions and 1 deletions
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9
fs/xfs/xfs_super.c
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@ -1574,9 +1574,16 @@ xfs_fs_fill_super(
} }
} }
if (xfs_sb_version_hasrmapbt(&mp->m_sb)) if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
if (mp->m_sb.sb_rblocks) {
xfs_alert(mp,
"EXPERIMENTAL reverse mapping btree not compatible with realtime device!");
error = -EINVAL;
goto out_filestream_unmount;
}
xfs_alert(mp, xfs_alert(mp,
"EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!"); "EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!");
}
error = xfs_mountfs(mp); error = xfs_mountfs(mp);
if (error) if (error)