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| author | William Tu <u9012063@gmail.com> | 2017-12-06 00:15:45 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-06 20:45:29 +0100 |
| commit | d37e3bb774ee922a7b5b8c26d798d1575b225858 (patch) | |
| tree | 334d978fd0c89f585b2e604ffe92ea06317e9b34 /samples/bpf/tcbpf2_kern.c | |
| parent | ip6_gre: add ip6 erspan collect_md mode (diff) | |
| download | linux-d37e3bb774ee922a7b5b8c26d798d1575b225858.tar.xz linux-d37e3bb774ee922a7b5b8c26d798d1575b225858.zip | |
samples/bpf: add ip6erspan sample code
Extend the existing tests for ip6erspan.
Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/tcbpf2_kern.c')
| -rw-r--r-- | samples/bpf/tcbpf2_kern.c | 58 |
1 files changed, 58 insertions, 0 deletions
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) { |