netdev - [PATCH net-next 3/4] selftests: forwarding: Test redirecting ip6gre and ip6tnl packets to Ethernet

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Date:   Wed, 30 Jun 2021 14:51:45 +0200
From:   Guillaume Nault <gnault@...hat.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, David Ahern <dsahern@...il.com>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org
Subject: [PATCH net-next 3/4] selftests: forwarding: Test redirecting ip6gre
 and ip6tnl packets to Ethernet

Add selftests for the following commit:
  * da5a2e49f064 ("ip6_tunnel: allow redirecting ip6gre and ipxip6
    packets to eth devices").

Like with the previous tc_redirect_l2l3.sh tests, verify that the
following tc filter works on the ingress qdisc of ip6gre and ip6tnl
devices:
  $ tc filter add dev tunnel0 ingress matchall       \
      action vlan push_eth dst_mac 00:00:5e:00:53:01 \
                           src_mac 00:00:5e:00:53:00 \
      action mirred egress redirect dev eth0

Signed-off-by: Guillaume Nault <gnault@...hat.com>
---
 tools/testing/selftests/net/forwarding/config |  2 ++
 .../net/forwarding/tc_redirect_l2l3.sh        | 36 +++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/config b/tools/testing/selftests/net/forwarding/config
index c543b441a8b5..5d3ab2b63c53 100644
--- a/tools/testing/selftests/net/forwarding/config
+++ b/tools/testing/selftests/net/forwarding/config
@@ -19,3 +19,5 @@ CONFIG_NET_NS=y
 CONFIG_NET_IPGRE=m
 CONFIG_NET_IPIP=m
 CONFIG_IPV6_SIT=m
+CONFIG_IPV6_GRE=m
+CONFIG_IPV6_TUNNEL=m
diff --git a/tools/testing/selftests/net/forwarding/tc_redirect_l2l3.sh b/tools/testing/selftests/net/forwarding/tc_redirect_l2l3.sh
index fd9e15a6417b..207b92775a6c 100755
--- a/tools/testing/selftests/net/forwarding/tc_redirect_l2l3.sh
+++ b/tools/testing/selftests/net/forwarding/tc_redirect_l2l3.sh
@@ -25,6 +25,8 @@ ALL_TESTS="
 	redir_gre
 	redir_ipip
 	redir_sit
+	redir_ip6gre
+	redir_ip6tnl
 "
 
 NUM_NETIFS=0
@@ -318,6 +320,40 @@ redir_sit()
 	cleanup_tunnel
 }
 
+redir_ip6gre()
+{
+	setup_tunnel "ipv6" "classical" "ip6gre"
+	ping_test ipv4 "IP6GRE, classical mode: IPv6 / GRE / IPv4"
+	ping_test ipv6 "IP6GRE, classical mode: IPv6 / GRE / IPv6"
+	ping_test ipv4-mpls "IP6GRE, classical mode: IPv6 / GRE / MPLS / IPv4"
+	ping_test ipv6-mpls "IP6GRE, classical mode: IPv6 / GRE / MPLS / IPv6"
+	cleanup_tunnel
+
+	setup_tunnel "ipv6" "collect_md" "ip6gre" "external" "nocsum"
+	ping_test ipv4 "IP6GRE, external mode: IPv6 / GRE / IPv4"
+	ping_test ipv6 "IP6GRE, external mode: IPv6 / GRE / IPv6"
+	ping_test ipv4-mpls "IP6GRE, external mode: IPv6 / GRE / MPLS / IPv4"
+	ping_test ipv6-mpls "IP6GRE, external mode: IPv6 / GRE / MPLS / IPv6"
+	cleanup_tunnel
+}
+
+redir_ip6tnl()
+{
+	setup_tunnel "ipv6" "classical" "ip6tnl" "mode any"
+	ping_test ipv4 "IP6TNL, classical mode: IPv6 / IPv4"
+	ping_test ipv6 "IP6TNL, classical mode: IPv6 / IPv6"
+	ping_test ipv4-mpls "IP6TNL, classical mode: IPv6 / MPLS / IPv4"
+	ping_test ipv6-mpls "IP6TNL, classical mode: IPv6 / MPLS / IPv6"
+	cleanup_tunnel
+
+	setup_tunnel "ipv6" "collect_md" "ip6tnl" "mode any external"
+	ping_test ipv4 "IP6TNL, external mode: IPv6 / IPv4"
+	ping_test ipv6 "IP6TNL, external mode: IPv6 / IPv6"
+	ping_test ipv4-mpls "IP6TNL, external mode: IPv6 / MPLS / IPv4"
+	ping_test ipv6-mpls "IP6TNL, external mode: IPv6 / MPLS / IPv6"
+	cleanup_tunnel
+}
+
 exit_cleanup()
 {
 	if [ "${TESTS_COMPLETED}" = "no" ]; then
-- 
2.21.3