[MPTCP][PATCH v7 mptcp-next 5/5] selftests: mptcp: add MP_FAIL mibs check

[Geliang Tang <geliangtang@gmail.com>]

From: Geliang Tang <geliangtang@xiaomi.com>

This patch added a function chk_fail_nr to check the mibs for MP_FAIL.

Signed-off-by: Geliang Tang <geliangtang@xiaomi.com>
---
 .../testing/selftests/net/mptcp/mptcp_join.sh | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index 937e861e9490..551fcce7c2f2 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -566,6 +566,43 @@ chk_csum_nr()
 	fi
 }
 
+chk_fail_nr()
+{
+	local mp_fail_nr_tx=$1
+	local mp_fail_nr_rx=$2
+	local count
+	local dump_stats
+
+	printf "%-39s %s" " " "ftx"
+	count=`ip netns exec $ns1 nstat -as | grep MPTcpExtMPFailTx | awk '{print $2}'`
+	[ -z "$count" ] && count=0
+	if [ "$count" != "$mp_fail_nr_tx" ]; then
+		echo "[fail] got $count MP_FAIL[s] TX expected $mp_fail_nr_tx"
+		ret=1
+		dump_stats=1
+	else
+		echo -n "[ ok ]"
+	fi
+
+	echo -n " - frx   "
+	count=`ip netns exec $ns2 nstat -as | grep MPTcpExtMPFailRx | awk '{print $2}'`
+	[ -z "$count" ] && count=0
+	if [ "$count" != "$mp_fail_nr_rx" ]; then
+		echo "[fail] got $count MP_FAIL[s] RX expected $mp_fail_nr_rx"
+		ret=1
+		dump_stats=1
+	else
+		echo "[ ok ]"
+	fi
+
+	if [ "${dump_stats}" = 1 ]; then
+		echo Server ns stats
+		ip netns exec $ns1 nstat -as | grep MPTcp
+		echo Client ns stats
+		ip netns exec $ns2 nstat -as | grep MPTcp
+	fi
+}
+
 chk_join_nr()
 {
 	local msg="$1"
@@ -615,6 +652,7 @@ chk_join_nr()
 	fi
 	if [ $checksum -eq 1 ]; then
 		chk_csum_nr
+		chk_fail_nr 0 0
 	fi
 }
 
-- 
2.31.1