[PATCH net-next 3/3] samples/bpf: extend test_tunnel_bpf.sh with ERSPAN
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STALE3335d
REVIEWED: 5 (5M)
From: William Tu <hidden>
Date: 2017-08-25 16:21:43
Subsystem:
bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
1 review trailer (1 from subsystem maintainers).
Extend existing tests for vxlan, gre, geneve, ipip to include ERSPAN tunnel. Signed-off-by: William Tu <redacted> Acked-by: Alexei Starovoitov <ast@kernel.org> --- samples/bpf/tcbpf2_kern.c | 63 +++++++++++++++++++++++++++++++++++++++++- samples/bpf/test_tunnel_bpf.sh | 29 +++++++++++++++++++ 2 files changed, 91 insertions(+), 1 deletion(-)
diff --git a/samples/bpf/tcbpf2_kern.c b/samples/bpf/tcbpf2_kern.c
index 270edcc149a1..370b749f5ee6 100644
--- a/samples/bpf/tcbpf2_kern.c
+++ b/samples/bpf/tcbpf2_kern.c@@ -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";
diff --git a/samples/bpf/test_tunnel_bpf.sh b/samples/bpf/test_tunnel_bpf.sh
index a70d2ea90313..410052d9fc37 100755
--- a/samples/bpf/test_tunnel_bpf.sh
+++ b/samples/bpf/test_tunnel_bpf.sh@@ -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..."
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2.7.4