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bpf: support flow label for bpf_skb_{set, get}_tunnel_key

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This patch extends bpf_tunnel_key with a tunnel_label member, that maps
to ip_tunnel_key's label so underlying backends like vxlan and geneve
can propagate the label to udp_tunnel6_xmit_skb(), where it's being set
in the IPv6 header. It allows for having 20 more bits to encode/decode
flow related meta information programmatically. Tested with vxlan and
geneve.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
2016-03-09 03:00:05 +01:00
committed by David S. Miller
parent 8eb3b99554
commit 4018ab1875
2 changed files with 13 additions and 2 deletions
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include/uapi/linux/bpf.h
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@@ -375,6 +375,7 @@ struct bpf_tunnel_key {
};
__u8 tunnel_tos;
__u8 tunnel_ttl;
__u32 tunnel_label;
};
#endif /* _UAPI__LINUX_BPF_H__ */