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samples/bpf: extend test_tunnel_bpf.sh with ERSPAN

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

Signed-off-by: William Tu <u9012063@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
William Tu 2017-08-25 09:21:29 -07:00 committed by David S. Miller
parent 1a66a836da
commit ef88f89c83
2 changed files with 91 additions and 1 deletions
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63
samples/bpf/tcbpf2_kern.c
View File

@ -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";

29
samples/bpf/test_tunnel_bpf.sh
View File

@ -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..."