netdev - Re: [Patch bpf-next v6 1/8] bpf: clean up sockmap related Kconfigs

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Date:   Mon, 22 Feb 2021 09:51:59 +0100
From:   Jakub Sitnicki <jakub@...udflare.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        duanxiongchun@...edance.com, wangdongdong.6@...edance.com,
        jiang.wang@...edance.com, Cong Wang <cong.wang@...edance.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Lorenz Bauer <lmb@...udflare.com>,
        John Fastabend <john.fastabend@...il.com>
Subject: Re: [Patch bpf-next v6 1/8] bpf: clean up sockmap related Kconfigs

On Sat, Feb 20, 2021 at 06:29 AM CET, Cong Wang wrote:
> From: Cong Wang <cong.wang@...edance.com>
>
> As suggested by John, clean up sockmap related Kconfigs:
>
> Reduce the scope of CONFIG_BPF_STREAM_PARSER down to TCP stream
> parser, to reflect its name.
>
> Make the rest sockmap code simply depend on CONFIG_BPF_SYSCALL
> and CONFIG_INET, the latter is still needed at this point because
> of TCP/UDP proto update. And leave CONFIG_NET_SOCK_MSG untouched,
> as it is used by non-sockmap cases.
>
> Cc: Daniel Borkmann <daniel@...earbox.net>
> Cc: Jakub Sitnicki <jakub@...udflare.com>
> Reviewed-by: Lorenz Bauer <lmb@...udflare.com>
> Acked-by: John Fastabend <john.fastabend@...il.com>
> Signed-off-by: Cong Wang <cong.wang@...edance.com>
> ---

Couple comments:

1. sk_psock_done_strp() could be static to skmsg.c, as mentioned
   earlier.

2. udp_bpf.c is built when CONFIG_BPF_SYSCALL is enabled, while its API
   declarations in udp.h are guarded on CONFIG_NET_SOCK_MSG.

   This works because BPF_SYSCALL now selects NET_SOCK_MSG if INET, and
   INET has to be enabled when using udp, but seems confusing to me.

Acked-by: Jakub Sitnicki <jakub@...udflare.com>