[PATCH bpf-next 1/2] selftest/bpf: add missed ip6ip6 test back

[Hangbin Liu <liuhangbin@gmail.com>]

In comment 173ca26e9b51 ("samples/bpf: add comprehensive ipip, ipip6,
ip6ip6 test") we added ip6ip6 test for bpf tunnel testing. But in commit
933a741e3b82 ("selftests/bpf: bpf tunnel test.") when we moved it to
the current folder, we didn't add it.

This patch add the ip6ip6 test back to bpf tunnel test. Since the
underlay network is the same, we can reuse the ipip6 framework directly.
Iperf test is removed as currect framework simplified it in purpose.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
 tools/testing/selftests/bpf/test_tunnel.sh | 39 ++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_tunnel.sh b/tools/testing/selftests/bpf/test_tunnel.sh
index bd12ec97a44d..76a00d2ef988 100755
--- a/tools/testing/selftests/bpf/test_tunnel.sh
+++ b/tools/testing/selftests/bpf/test_tunnel.sh
@@ -24,12 +24,12 @@
 # Root namespace with metadata-mode tunnel + BPF
 # Device names and addresses:
 # 	veth1 IP: 172.16.1.200, IPv6: 00::22 (underlay)
-# 	tunnel dev <type>11, ex: gre11, IPv4: 10.1.1.200 (overlay)
+# 	tunnel dev <type>11, ex: gre11, IPv4: 10.1.1.200, IPv6: 1::22 (overlay)
 #
 # Namespace at_ns0 with native tunnel
 # Device names and addresses:
 # 	veth0 IPv4: 172.16.1.100, IPv6: 00::11 (underlay)
-# 	tunnel dev <type>00, ex: gre00, IPv4: 10.1.1.100 (overlay)
+# 	tunnel dev <type>00, ex: gre00, IPv4: 10.1.1.100, IPv6: 1::11 (overlay)
 #
 #
 # End-to-end ping packet flow
@@ -262,11 +262,13 @@ add_ipip6tnl_tunnel()
 		ip link add dev $DEV_NS type $TYPE \
 		local ::11 remote ::22
 	ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
+	ip netns exec at_ns0 ip addr add dev $DEV_NS 1::11/96
 	ip netns exec at_ns0 ip link set dev $DEV_NS up
 
 	# root namespace
 	ip link add dev $DEV type $TYPE external
 	ip addr add dev $DEV 10.1.1.200/24
+	ip addr add dev $DEV 1::22/96
 	ip link set dev $DEV up
 }
 
@@ -553,6 +555,34 @@ test_ipip6()
         echo -e ${GREEN}"PASS: $TYPE"${NC}
 }
 
+test_ip6ip6()
+{
+	TYPE=ip6tnl
+	DEV_NS=ip6ip6tnl00
+	DEV=ip6ip6tnl11
+	ret=0
+
+	check $TYPE
+	config_device
+	add_ipip6tnl_tunnel
+	ip link set dev veth1 mtu 1500
+	attach_bpf $DEV ipip6_set_tunnel ipip6_get_tunnel
+	# underlay
+	ping6 $PING_ARG ::11
+	# ip6 over ip6
+	ping6 $PING_ARG 1::11
+	check_err $?
+	ip netns exec at_ns0 ping6 $PING_ARG 1::22
+	check_err $?
+	cleanup
+
+	if [ $ret -ne 0 ]; then
+                echo -e ${RED}"FAIL: ip6$TYPE"${NC}
+                return 1
+        fi
+        echo -e ${GREEN}"PASS: ip6$TYPE"${NC}
+}
+
 setup_xfrm_tunnel()
 {
 	auth=0x$(printf '1%.0s' {1..40})
@@ -646,6 +676,7 @@ cleanup()
 	ip link del veth1 2> /dev/null
 	ip link del ipip11 2> /dev/null
 	ip link del ipip6tnl11 2> /dev/null
+	ip link del ip6ip6tnl11 2> /dev/null
 	ip link del gretap11 2> /dev/null
 	ip link del ip6gre11 2> /dev/null
 	ip link del ip6gretap11 2> /dev/null
@@ -742,6 +773,10 @@ bpf_tunnel_test()
 	test_ipip6
 	errors=$(( $errors + $? ))
 
+	echo "Testing IP6IP6 tunnel..."
+	test_ip6ip6
+	errors=$(( $errors + $? ))
+
 	echo "Testing IPSec tunnel..."
 	test_xfrm_tunnel
 	errors=$(( $errors + $? ))
-- 
2.25.4