[PATCH] common/rc: avoid mkfs option conflicts in _scratch_mkfs_xfs_supported

[Eryu Guan <eguan@xxxxxxxxxx>]

In recent mkfs.xfs updates in xfsprogs, commit 9090e187bc3e ("mkfs:
add respecification detection to generic parsing") added
re-specification detection to "-m" option, it causes several tests
_notrun if MKFS_OPTIONS has the same options as those being tested
in _scratch_mkfs_xfs_supported(), because they're specified multiple
times.

        MKFS_OPTIONS="-m crc=0" ./check xfs/001
        xfs/001 3s ... [not run] mkfs.xfs doesn't have crc feature

Fix it by creating XFS again without MKFS_OPTIONS in
_scratch_mkfs_xfs_supported(), in case there's conflict between
MKFS_OPTIONS and mkfs_opts, like what we do in _scratch_mkfs_xfs().

Signed-off-by: Eryu Guan <eguan@xxxxxxxxxx>
---
 common/rc | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/common/rc b/common/rc
index 883bd7b..ad81461 100644
--- a/common/rc
+++ b/common/rc
@@ -473,11 +473,20 @@ _scratch_mkfs_xfs_opts()
 
 _scratch_mkfs_xfs_supported()
 {
-       mkfs_opts=$*
+       local mkfs_opts=$*
 
        _scratch_options mkfs
 
        $MKFS_XFS_PROG -N $MKFS_OPTIONS $SCRATCH_OPTIONS $mkfs_opts $SCRATCH_DEV
+       local mkfs_status=$?
+
+       # if $mkfs_opts conflits with $MKFS_OPTIONS,
+       # try again without $MKFS_OPTIONS
+       if [ $mkfs_status -ne 0 -a -n "$MKFS_OPTIONS" ]; then
+               $MKFS_XFS_PROG -N $SCRATCH_OPTIONS $mkfs_opts $SCRATCH_DEV
+               mkfs_status=$?
+       fi
+       return $mkfs_status
 }
 
 _scratch_mkfs_xfs()
-- 
2.7.4