[v3,net-next,3/5] selftests: openvswitch: add a test for ipv4 forwarding

Commit Message

Aaron Conole Aug. 1, 2023, 9:22 p.m. UTC

This is a simple ipv4 bidirectional connectivity test.

Signed-off-by: Aaron Conole <[e-mail]>
Reviewed-by: Adrian Moreno <[e-mail]>
---
NOTE: 4 lines flag the line-length checkpatch warning, but there didn't
      seem to be a good way of breaking the lines smaller.

 .../selftests/net/openvswitch/openvswitch.sh  | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)

Patch

diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh
index 5cdacb3c8c925..5d60a9466dab3 100755
--- a/tools/testing/selftests/net/openvswitch/openvswitch.sh
+++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh
@@ -12,6 +12,7 @@  TRACING=0
 
 tests="
 	arp_ping				eth-arp: Basic arp ping between two NS
+	connect_v4				ip4-xon: Basic ipv4 ping between two NS
 	netlink_checks				ovsnl: validate netlink attrs and settings
 	upcall_interfaces			ovs: test the upcall interfaces"
 
@@ -192,6 +193,45 @@  test_arp_ping () {
 	return 0
 }
 
+# connect_v4 test
+#  - client has 1500 byte MTU
+#  - server has 1500 byte MTU
+#  - use ICMP to ping in each direction
+test_connect_v4 () {
+
+	sbx_add "test_connect_v4" || return $?
+
+	ovs_add_dp "test_connect_v4" cv4 || return 1
+
+	info "create namespaces"
+	for ns in client server; do
+		ovs_add_netns_and_veths "test_connect_v4" "cv4" "$ns" \
+		    "${ns:0:1}0" "${ns:0:1}1" || return 1
+	done
+
+
+	ip netns exec client ip addr add 172.31.110.10/24 dev c1
+	ip netns exec client ip link set c1 up
+	ip netns exec server ip addr add 172.31.110.20/24 dev s1
+	ip netns exec server ip link set s1 up
+
+	# Add forwarding for ARP and ip packets - completely wildcarded
+	ovs_add_flow "test_connect_v4" cv4 \
+		'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1
+	ovs_add_flow "test_connect_v4" cv4 \
+		'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1
+	ovs_add_flow "test_connect_v4" cv4 \
+		'in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10)' '2' || return 1
+	ovs_add_flow "test_connect_v4" cv4 \
+		'in_port(2),eth(),eth_type(0x0800),ipv4(src=172.31.110.20)' '1' || return 1
+
+	# do a ping
+	ovs_sbx "test_connect_v4" ip netns exec client ping 172.31.110.20 -c 3 || return 1
+
+	info "done..."
+	return 0
+}
+
 # netlink_validation
 # - Create a dp
 # - check no warning with "old version" simulation