selftests: mlxsw: Test nexthop offload indication

Test that IPv4 and IPv6 nexthops are correctly marked with offload
indication in response to neighbour events.

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

diff --git a/tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh b/tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh
index 1c30f30..5c39e5f 100755 (executable)
--- a/tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/rtnetlink.sh
@@ -28,6 +28,7 @@ ALL_TESTS="
        vlan_interface_uppers_test
        bridge_extern_learn_test
        neigh_offload_test
+       nexthop_offload_test
        devlink_reload_test
 "
 NUM_NETIFS=2
@@ -607,6 +608,52 @@ neigh_offload_test()
        ip -4 address del 192.0.2.1/24 dev $swp1
 }
 
+nexthop_offload_test()
+{
+       # Test that IPv4 and IPv6 nexthops are marked as offloaded
+       RET=0
+
+       sysctl_set net.ipv6.conf.$swp2.keep_addr_on_down 1
+       simple_if_init $swp1 192.0.2.1/24 2001:db8:1::1/64
+       simple_if_init $swp2 192.0.2.2/24 2001:db8:1::2/64
+       setup_wait
+
+       ip -4 route add 198.51.100.0/24 vrf v$swp1 \
+               nexthop via 192.0.2.2 dev $swp1
+       ip -6 route add 2001:db8:2::/64 vrf v$swp1 \
+               nexthop via 2001:db8:1::2 dev $swp1
+
+       ip -4 route show 198.51.100.0/24 vrf v$swp1 | grep -q offload
+       check_err $? "ipv4 nexthop not marked as offloaded when should"
+       ip -6 route show 2001:db8:2::/64 vrf v$swp1 | grep -q offload
+       check_err $? "ipv6 nexthop not marked as offloaded when should"
+
+       ip link set dev $swp2 down
+       sleep 1
+
+       ip -4 route show 198.51.100.0/24 vrf v$swp1 | grep -q offload
+       check_fail $? "ipv4 nexthop marked as offloaded when should not"
+       ip -6 route show 2001:db8:2::/64 vrf v$swp1 | grep -q offload
+       check_fail $? "ipv6 nexthop marked as offloaded when should not"
+
+       ip link set dev $swp2 up
+       setup_wait
+
+       ip -4 route show 198.51.100.0/24 vrf v$swp1 | grep -q offload
+       check_err $? "ipv4 nexthop not marked as offloaded after neigh add"
+       ip -6 route show 2001:db8:2::/64 vrf v$swp1 | grep -q offload
+       check_err $? "ipv6 nexthop not marked as offloaded after neigh add"
+
+       log_test "nexthop offload indication"
+
+       ip -6 route del 2001:db8:2::/64 vrf v$swp1
+       ip -4 route del 198.51.100.0/24 vrf v$swp1
+
+       simple_if_fini $swp2 192.0.2.2/24 2001:db8:1::2/64
+       simple_if_fini $swp1 192.0.2.1/24 2001:db8:1::1/64
+       sysctl_restore net.ipv6.conf.$swp2.keep_addr_on_down
+}
+
 devlink_reload_test()
 {
        # Test that after executing all the above configuration tests, a