This patch added a new function chk_rst_nr() to check the numbers
of the MP_RST sending and receiving mibs.

Showed in the output whether the inverted namespaces check order is used.
Since if we pass -Cz to mptcp_join.sh, the MP_RST information is showed
twice.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 .../testing/selftests/net/mptcp/mptcp_join.sh | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index f71494b87d5e..3252865352f3 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -802,6 +802,55 @@ chk_fail_nr()
 	[ "${dump_stats}" = 1 ] && dump_stats
 }
 
+chk_rst_nr()
+{
+	local rst_tx=$1
+	local rst_rx=$2
+	local ns_invert=${3:-""}
+	local count
+	local dump_stats
+
+	if [ -z $ns_invert ]; then
+		ns_tx=$ns1
+		ns_rx=$ns2
+	elif [ $ns_invert = "invert" ]; then
+		ns_tx=$ns2
+		ns_rx=$ns1
+	fi
+
+	printf "%-${nr_blank}s %s" " " "rtx"
+	count=`ip netns exec $ns_tx nstat -as | grep MPTcpExtMPRstTx | awk '{print $2}'`
+	[ -z "$count" ] && count=0
+	if [ "$count" != "$rst_tx" ]; then
+		echo "[fail] got $count MP_RST[s] TX expected $rst_tx"
+		ret=1
+		dump_stats=1
+	else
+		echo -n "[ ok ]"
+	fi
+
+	echo -n " - rstrx "
+	count=`ip netns exec $ns_rx nstat -as | grep MPTcpExtMPRstRx | awk '{print $2}'`
+	[ -z "$count" ] && count=0
+	if [ "$count" != "$rst_rx" ]; then
+		echo "[fail] got $count MP_RST[s] RX expected $rst_rx"
+		ret=1
+		dump_stats=1
+	else
+		if [ -z $ns_invert ]; then
+			echo "[ ok ]"
+		elif [ $ns_invert = "invert" ]; then
+			echo -n "[ ok ]"
+		fi
+	fi
+
+	if [ ! -z $ns_invert ] && [ $ns_invert = "invert" ]; then
+		echo " - invert"
+	fi
+
+	[ "${dump_stats}" = 1 ] && dump_stats
+}
+
 chk_infi_nr()
 {
 	local mp_infi_nr_tx=$1
@@ -920,6 +969,7 @@ chk_join_nr()
 	if [ $checksum -eq 1 ]; then
 		chk_csum_nr
 		chk_fail_nr 0 0
+		chk_rst_nr 0 0
 		chk_infi_nr 0 0
 	fi
 }
-- 
2.34.1