[PATCH RFC 2/2] xfstests: common/rc: add cluster size support for ext4

[Jeffle Xu <jefflexu@linux.alibaba.com>]

Inserting and collapsing range on ext4 with 'bigalloc' feature will
fail due to the offset and size should be alligned with the cluster
size.

The previous patch has add support for cluster size in fsx. Detect and
pass the cluster size parameter to fsx if the underlying filesystem
is ext4 with bigalloc.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
---
 common/rc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/common/rc b/common/rc
index 2000bd9..71dde5f 100644
--- a/common/rc
+++ b/common/rc
@@ -3908,6 +3908,15 @@ run_fsx()
 {
 	echo fsx $@
 	local args=`echo $@ | sed -e "s/ BSIZE / $bsize /g" -e "s/ PSIZE / $psize /g"`
+
+	if [ "$FSTYP" == "ext4" ]; then
+		local cluster_size=$(tune2fs -l $TEST_DEV | grep 'Cluster size' | awk '{print $3}')
+		if [ -n $cluster_size ]; then
+			echo "cluster size: $cluster_size"
+			args="$args -u $cluster_size"
+		fi
+	fi
+
 	set -- $here/ltp/fsx $args $FSX_AVOID $TEST_DIR/junk
 	echo "$@" >>$seqres.full
 	rm -f $TEST_DIR/junk
-- 
1.8.3.1