On Wed, Mar 30, 2016 at 12:02:00AM +0200, Daniel Borkmann wrote:
> Make the 2 byte padding in struct bpf_tunnel_key between tunnel_ttl
> and tunnel_label members explicit. No issue has been observed, and
> gcc/llvm does padding for the old struct already, where tunnel_label
> was not yet present, so the current code works, but since it's part
> of uapi, make sure we don't introduce holes in structs.
>
> Therefore, add tunnel_ext that we can use generically in future
> (f.e. to flag OAM messages for backends, etc). Also add the offset
> to the compat tests to be sure should some compilers not padd the
> tail of the old version of bpf_tunnel_key.
>
> Fixes: 4018ab1875e0 ("bpf: support flow label for bpf_skb_{set,
> get}_tunnel_key")
> Signed-off-by: Daniel Borkmann <dan...@iogearbox.net>
Acked-by: Alexei Starovoitov <a...@kernel.org>
