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Commit ef88f89c authored by William Tu's avatar William Tu Committed by David S. Miller
Browse files

samples/bpf: extend test_tunnel_bpf.sh with ERSPAN 



Extend existing tests for vxlan, gre, geneve, ipip to
include ERSPAN tunnel.

Signed-off-by: default avatarWilliam Tu <u9012063@gmail.com>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1a66a836

samples/bpf/tcbpf2_kern.c

+62 −1
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <uapi/linux/pkt_cls.h>

#include <net/ipv6.h>

#include "bpf_helpers.h"

#include "bpf_endian.h"



#define _htonl __builtin_bswap32

#define ERROR(ret) do {\
@@ -38,6 +39,10 @@ struct vxlan_metadata { 
	u32     gbp;

};



struct erspan_metadata {

	__be32 index;

};



SEC("gre_set_tunnel")

int _gre_set_tunnel(struct __sk_buff *skb)

{
@@ -76,6 +81,63 @@ int _gre_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("erspan_set_tunnel")

int _erspan_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_ipv4 = 0xac100164; /* 172.16.1.100 */

	key.tunnel_id = 2;

	key.tunnel_tos = 0;

	key.tunnel_ttl = 64;



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

	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("erspan_get_tunnel")

int _erspan_get_tunnel(struct __sk_buff *skb)

{

	char fmt[] = "key %d remote ip 0x%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), 0);

	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_ipv4, index);



	return TC_ACT_OK;

}



SEC("vxlan_set_tunnel")

int _vxlan_set_tunnel(struct __sk_buff *skb)

{
@@ -378,5 +440,4 @@ int _ip6ip6_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}





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

samples/bpf/test_tunnel_bpf.sh

+29 −0
Original line number Diff line number Diff line
@@ -32,6 +32,19 @@ function add_gre_tunnel { 
	ip addr add dev $DEV 10.1.1.200/24

}



function add_erspan_tunnel {

	# in namespace

	ip netns exec at_ns0 \

		ip link add dev $DEV_NS type $TYPE seq key 2 local 172.16.1.100 remote 172.16.1.200 erspan 123

	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 add_vxlan_tunnel {

	# Set static ARP entry here because iptables set-mark works

	# on L3 packet, as a result not applying to ARP packets,
@@ -99,6 +112,18 @@ function test_gre { 
	cleanup

}



function test_erspan {

	TYPE=erspan

	DEV_NS=erspan00

	DEV=erspan11

	config_device

	add_erspan_tunnel

	attach_bpf $DEV erspan_set_tunnel erspan_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 {

	TYPE=vxlan

	DEV_NS=vxlan00
@@ -151,14 +176,18 @@ function cleanup { 
	ip link del gretap11

	ip link del vxlan11

	ip link del geneve11

	ip link del erspan11

	pkill tcpdump

	pkill cat

	set -ex

}



trap cleanup 0 2 3 6 9

cleanup

echo "Testing GRE tunnel..."

test_gre

echo "Testing ERSPAN tunnel..."

test_erspan

echo "Testing VXLAN tunnel..."

test_vxlan

echo "Testing GENEVE tunnel..."