Re: [PATCH net-next] Add uid and cookie bpf helper to cg_skb_func_proto

[Alexei Starovoitov]

On Fri, Apr 14, 2017 at 04:12:14PM -0700, Chenbo Feng wrote:
> From: Chenbo Feng <fe...@google.com>
> 
> BPF helper functions get_socket_cookie and get_socket_uid can be
> used for network traffic classifications, among others. Expose
> them also to programs of type BPF_PROG_TYPE_CGROUP_SKB. As of
> commit 8f917bba0042 ("bpf: pass sk to helper functions") the required
> skb->sk function is available at both cgroup bpf ingress and egress
> hooks.
> 
> Signed-off-by: Chenbo Feng <fe...@google.com>

Thanks for follow up.
Another alternative is to do
cg_skb_func_proto(enum bpf_func_id func_id)
{
    return sk_filter_func_proto(func_id);
}

I think all socket filter helpers are applicable to cg_skb too.