selftests: mlxsw: vxlan: Add test for error path

Test that when two VXLAN tunnels with conflicting configurations (i.e.,
different TTL) are enslaved to the same VLAN-aware bridge, then the
enslavement of a port to the bridge is denied.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/drivers/net/mlxsw/vxlan.sh b/tools/testing/selftests/drivers/net/mlxsw/vxlan.sh
index 56b95fd414d6e8cf93d606301ad294fa40d0c961..15eb0dc9a68516e2e9de119e8775545f8ef02e51 100755 (executable)
--- a/tools/testing/selftests/drivers/net/mlxsw/vxlan.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/vxlan.sh
@@ -854,6 +854,26 @@ sanitization_vlan_aware_test()
        bridge vlan del vid 10 dev vxlan20
        bridge vlan add vid 20 dev vxlan20 pvid untagged
 
+       # Test that when two VXLAN tunnels with conflicting configurations
+       # (i.e., different TTL) are enslaved to the same VLAN-aware bridge,
+       # then the enslavement of a port to the bridge is denied.
+
+       # Use the offload indication of the local route to ensure the VXLAN
+       # configuration was correctly rollbacked.
+       ip address add 198.51.100.1/32 dev lo
+
+       ip link set dev vxlan10 type vxlan ttl 10
+       ip link set dev $swp1 master br0 &> /dev/null
+       check_fail $?
+
+       ip route show table local | grep 198.51.100.1 | grep -q offload
+       check_fail $?
+
+       log_test "vlan-aware - failed enslavement to bridge due to conflict"
+
+       ip link set dev vxlan10 type vxlan ttl 20
+       ip address del 198.51.100.1/32 dev lo
+
        ip link del dev vxlan20
        ip link del dev vxlan10
        ip link del dev br0