netdev - Re: [PATCH net-next v2] Add uid and cookie bpf helper to cg_skb_func

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Message-Id: <20170417.152226.777719963255509302.davem@davemloft.net>
Date:   Mon, 17 Apr 2017 15:22:26 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     chenbofeng.kernel@...il.com
Cc:     netdev@...r.kernel.org, lorenzo@...gle.com, willemb@...gle.com,
        fengc@...gle.com
Subject: Re: [PATCH net-next v2] Add uid and cookie bpf helper to
 cg_skb_func_proto

From: Chenbo Feng <chenbofeng.kernel@...il.com>
Date: Fri, 14 Apr 2017 18:25:26 -0700

> From: Chenbo Feng <fengc@...gle.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. With these two new helper, cg_skb_func_proto is
> effectively the same as sk_filter_func_proto.
> 
> Change since V1:
> Instead of add the helper to cg_skb_func_proto, redirect the
> cg_skb_func_proto to sk_filter_func_proto since all helper function
> in sk_filter_func_proto are applicable to cg_skb_func_proto now.
> 
> Signed-off-by: Chenbo Feng <fengc@...gle.com>

Applied, thanks.