From mboxrd@z Thu Jan 1 00:00:00 1970 From: William Tu Subject: [PATCH net-next 2/2] samples/bpf: add ip6erspan sample code Date: Tue, 5 Dec 2017 15:15:45 -0800 Message-ID: <1512515745-21003-3-git-send-email-u9012063@gmail.com> References: <1512515745-21003-1-git-send-email-u9012063@gmail.com> To: netdev@vger.kernel.org Return-path: Received: from mail-pg0-f67.google.com ([74.125.83.67]:43513 "EHLO mail-pg0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752841AbdLEXP5 (ORCPT ); Tue, 5 Dec 2017 18:15:57 -0500 Received: by mail-pg0-f67.google.com with SMTP id b18so1267612pgv.10 for ; Tue, 05 Dec 2017 15:15:57 -0800 (PST) Received: from sc9-mailhost2.vmware.com ([208.91.2.1]) by smtp.gmail.com with ESMTPSA id t202sm1298227pgb.75.2017.12.05.15.15.55 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 05 Dec 2017 15:15:55 -0800 (PST) In-Reply-To: <1512515745-21003-1-git-send-email-u9012063@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: Extend the existing tests for ip6erspan. Signed-off-by: William Tu --- samples/bpf/tcbpf2_kern.c | 58 ++++++++++++++++++++++++++++++++++++++++++ samples/bpf/test_tunnel_bpf.sh | 37 +++++++++++++++++++++++++++ 2 files changed, 95 insertions(+) diff --git a/samples/bpf/tcbpf2_kern.c b/samples/bpf/tcbpf2_kern.c index 15a469220e19..79ad061079dd 100644 --- a/samples/bpf/tcbpf2_kern.c +++ b/samples/bpf/tcbpf2_kern.c @@ -181,6 +181,64 @@ int _erspan_get_tunnel(struct __sk_buff *skb) return TC_ACT_OK; } +SEC("ip4ip6erspan_set_tunnel") +int _ip4ip6erspan_set_tunnel(struct __sk_buff *skb) +{ + struct bpf_tunnel_key key; + struct erspan_metadata md; + int ret; + + __builtin_memset(&key, 0x0, sizeof(key)); + key.remote_ipv6[3] = _htonl(0x11); + key.tunnel_id = 2; + key.tunnel_tos = 0; + key.tunnel_ttl = 64; + + ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key), + BPF_F_TUNINFO_IPV6); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + md.index = htonl(123); + ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md)); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + return TC_ACT_OK; +} + +SEC("ip4ip6erspan_get_tunnel") +int _ip4ip6erspan_get_tunnel(struct __sk_buff *skb) +{ + char fmt[] = "key %d remote ip6 ::%x erspan index 0x%x\n"; + struct bpf_tunnel_key key; + struct erspan_metadata md; + u32 index; + int ret; + + ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), BPF_F_TUNINFO_IPV6); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + ret = bpf_skb_get_tunnel_opt(skb, &md, sizeof(md)); + if (ret < 0) { + ERROR(ret); + return TC_ACT_SHOT; + } + + index = bpf_ntohl(md.index); + bpf_trace_printk(fmt, sizeof(fmt), + key.tunnel_id, key.remote_ipv6[0], index); + + return TC_ACT_OK; +} + SEC("vxlan_set_tunnel") int _vxlan_set_tunnel(struct __sk_buff *skb) { diff --git a/samples/bpf/test_tunnel_bpf.sh b/samples/bpf/test_tunnel_bpf.sh index 226f45381b76..f53efb62f699 100755 --- a/samples/bpf/test_tunnel_bpf.sh +++ b/samples/bpf/test_tunnel_bpf.sh @@ -70,6 +70,28 @@ function add_erspan_tunnel { ip addr add dev $DEV 10.1.1.200/24 } +function add_ip6erspan_tunnel { + + # assign ipv6 address + ip netns exec at_ns0 ip addr add ::11/96 dev veth0 + ip netns exec at_ns0 ip link set dev veth0 up + ip addr add dev veth1 ::22/96 + ip link set dev veth1 up + + # in namespace + ip netns exec at_ns0 \ + ip link add dev $DEV_NS type $TYPE seq key 2 erspan 123 \ + 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 link set dev $DEV_NS up + + # out of namespace + ip link add dev $DEV type $TYPE external + ip addr add dev $DEV 10.1.1.200/24 + ip link set dev $DEV up +} + function add_vxlan_tunnel { # Set static ARP entry here because iptables set-mark works # on L3 packet, as a result not applying to ARP packets, @@ -184,6 +206,18 @@ function test_erspan { cleanup } +function test_ip6erspan { + TYPE=ip6erspan + DEV_NS=ip6erspan00 + DEV=ip6erspan11 + config_device + add_ip6erspan_tunnel + attach_bpf $DEV ip4ip6erspan_set_tunnel ip4ip6erspan_get_tunnel + ping6 -c 3 ::11 + ip netns exec at_ns0 ping -c 1 10.1.1.200 + cleanup +} + function test_vxlan { TYPE=vxlan DEV_NS=vxlan00 @@ -239,6 +273,7 @@ function cleanup { ip link del vxlan11 ip link del geneve11 ip link del erspan11 + ip link del ip6erspan11 pkill tcpdump pkill cat set -ex @@ -254,6 +289,8 @@ echo "Testing IP6GRETAP tunnel..." test_ip6gretap echo "Testing ERSPAN tunnel..." test_erspan +echo "Testing IP6ERSPAN tunnel..." +test_ip6erspan echo "Testing VXLAN tunnel..." test_vxlan echo "Testing GENEVE tunnel..." -- 2.7.4