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

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Message-ID: <CAM_iQpWuRT6miFgsDvMLoOhtROmP=f6-qo6QfEAm7xFDfqB4rA@mail.gmail.com>
Date:   Mon, 22 Feb 2021 15:23:16 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Jakub Sitnicki <jakub@...udflare.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, duanxiongchun@...edance.com,
        Dongdong Wang <wangdongdong.6@...edance.com>,
        Jiang Wang <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 Mon, Feb 22, 2021 at 12:52 AM Jakub Sitnicki <jakub@...udflare.com> wrote:
>
> 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.

Oops, I thought you meant to move it to sock_map.c...

>
> 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.
>

Sure.

Thanks.