Commit a1c82704 authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by David S. Miller
Browse files

samples/bpf: extend test_tunnel_bpf.sh with IPIP test 



extend existing tests for vxlan, geneve, gre to include IPIP tunnel.
It tests both traditional tunnel configuration and
dynamic via bpf helpers.

Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8d79266b

samples/bpf/tcbpf2_kern.c

+58 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2016 VMware

 * Copyright (c) 2016 Facebook

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of version 2 of the GNU General Public
@@ -188,4 +189,61 @@ int _geneve_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ipip_set_tunnel")

int _ipip_set_tunnel(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key = {};

	void *data = (void *)(long)skb->data;

	struct iphdr *iph = data;

	struct tcphdr *tcp = data + sizeof(*iph);

	void *data_end = (void *)(long)skb->data_end;

	int ret;



	/* single length check */

	if (data + sizeof(*iph) + sizeof(*tcp) > data_end) {

		ERROR(1);

		return TC_ACT_SHOT;

	}



	key.tunnel_ttl = 64;

	if (iph->protocol == IPPROTO_ICMP) {

		key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */

	} else {

		if (iph->protocol != IPPROTO_TCP || iph->ihl != 5)

			return TC_ACT_SHOT;



		if (tcp->dest == htons(5200))

			key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */

		else if (tcp->dest == htons(5201))

			key.remote_ipv4 = 0xac100165; /* 172.16.1.101 */

		else

			return TC_ACT_SHOT;

	}



	ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key), 0);

	if (ret < 0) {

		ERROR(ret);

		return TC_ACT_SHOT;

	}



	return TC_ACT_OK;

}



SEC("ipip_get_tunnel")

int _ipip_get_tunnel(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;

	char fmt[] = "remote ip 0x%x\n";



	ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);

	if (ret < 0) {

		ERROR(ret);

		return TC_ACT_SHOT;

	}



	bpf_trace_printk(fmt, sizeof(fmt), key.remote_ipv4);

	return TC_ACT_OK;

}



char _license[] SEC("license") = "GPL";

samples/bpf/test_tunnel_bpf.sh

+48 −8
Original line number Diff line number Diff line
@@ -9,15 +9,13 @@ 
# local 172.16.1.200 remote 172.16.1.100

# veth1 IP: 172.16.1.200, tunnel dev <type>11



set -e



function config_device {

	ip netns add at_ns0

	ip link add veth0 type veth peer name veth1

	ip link set veth0 netns at_ns0

	ip netns exec at_ns0 ip addr add 172.16.1.100/24 dev veth0

	ip netns exec at_ns0 ip link set dev veth0 up

	ip link set dev veth1 up

	ip link set dev veth1 up mtu 1500

	ip addr add dev veth1 172.16.1.200/24

}
@@ -67,6 +65,19 @@ function add_geneve_tunnel { 
	ip addr add dev $DEV 10.1.1.200/24

}



function add_ipip_tunnel {

	# in namespace

	ip netns exec at_ns0 \

		ip link add dev $DEV_NS type $TYPE local 172.16.1.100 remote 172.16.1.200

	ip netns exec at_ns0 ip link set dev $DEV_NS up

	ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24



	# out of namespace

	ip link add dev $DEV type $TYPE external

	ip link set dev $DEV up

	ip addr add dev $DEV 10.1.1.200/24

}



function attach_bpf {

	DEV=$1

	SET_TUNNEL=$2
@@ -85,6 +96,7 @@ function test_gre { 
	attach_bpf $DEV gre_set_tunnel gre_get_tunnel

	ping -c 1 10.1.1.100

	ip netns exec at_ns0 ping -c 1 10.1.1.200

	cleanup

}



function test_vxlan {
@@ -96,6 +108,7 @@ function test_vxlan { 
	attach_bpf $DEV vxlan_set_tunnel vxlan_get_tunnel

	ping -c 1 10.1.1.100

	ip netns exec at_ns0 ping -c 1 10.1.1.200

	cleanup

}



function test_geneve {
@@ -107,21 +120,48 @@ function test_geneve { 
	attach_bpf $DEV geneve_set_tunnel geneve_get_tunnel

	ping -c 1 10.1.1.100

	ip netns exec at_ns0 ping -c 1 10.1.1.200

	cleanup

}



function test_ipip {

	TYPE=ipip

	DEV_NS=ipip00

	DEV=ipip11

	config_device

	tcpdump -nei veth1 &

	cat /sys/kernel/debug/tracing/trace_pipe &

	add_ipip_tunnel

	ethtool -K veth1 gso off gro off rx off tx off

	ip link set dev veth1 mtu 1500

	attach_bpf $DEV ipip_set_tunnel ipip_get_tunnel

	ping -c 1 10.1.1.100

	ip netns exec at_ns0 ping -c 1 10.1.1.200

	ip netns exec at_ns0 iperf -sD -p 5200 > /dev/null

	sleep 0.2

	iperf -c 10.1.1.100 -n 5k -p 5200

	cleanup

}



function cleanup {

	set +ex

	pkill iperf

	ip netns delete at_ns0

	ip link del veth1

	ip link del $DEV

	ip link del ipip11

	ip link del gretap11

	ip link del geneve11

	pkill tcpdump

	pkill cat

	set -ex

}



cleanup

echo "Testing GRE tunnel..."

test_gre

cleanup

echo "Testing VXLAN tunnel..."

test_vxlan

cleanup

echo "Testing GENEVE tunnel..."

test_geneve

cleanup

echo "Success"
 
echo "Testing IPIP tunnel..."

test_ipip

echo "*** PASS ***"