netdev - Re: [PATCH bpf-next v8 1/4] bpf: Add update_socket

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Message-ID: <94791e4f-98d4-454b-ae1d-3f61ac2b46d1@tessares.net>
Date: Thu, 3 Aug 2023 10:02:32 +0200
From: Matthieu Baerts <matthieu.baerts@...sares.net>
To: Geliang Tang <geliang.tang@...e.com>, Alexei Starovoitov
 <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
 Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau
 <martin.lau@...ux.dev>, Song Liu <song@...nel.org>,
 Yonghong Song <yhs@...com>, John Fastabend <john.fastabend@...il.com>,
 KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>,
 Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
 Florent Revest <revest@...omium.org>, Brendan Jackman
 <jackmanb@...omium.org>, Mat Martineau <martineau@...nel.org>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 John Johansen <john.johansen@...onical.com>, Paul Moore
 <paul@...l-moore.com>, James Morris <jmorris@...ei.org>,
 "Serge E. Hallyn" <serge@...lyn.com>,
 Stephen Smalley <stephen.smalley.work@...il.com>,
 Eric Paris <eparis@...isplace.org>, Mykola Lysenko <mykolal@...com>,
 Shuah Khan <shuah@...nel.org>
Cc: bpf@...r.kernel.org, netdev@...r.kernel.org, mptcp@...ts.linux.dev,
 apparmor@...ts.ubuntu.com, linux-security-module@...r.kernel.org,
 selinux@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH bpf-next v8 1/4] bpf: Add update_socket_protocol hook

Hi Geliang,

On 03/08/2023 09:30, Geliang Tang wrote:
> Add a hook named update_socket_protocol in __sys_socket(), for bpf
> progs to attach to and update socket protocol. One user case is to
> force legacy TCP apps to create and use MPTCP sockets instead of
> TCP ones.
> 
> Define a mod_ret set named bpf_mptcp_fmodret_ids, add the hook
> update_socket_protocol into this set, and register it in
> bpf_mptcp_kfunc_init().

Thank you for having looked at that!

Because it is related to MPTCP:

Acked-by: Matthieu Baerts <matthieu.baerts@...sares.net>

I don't know if your scripts to apply patches support the "Closes" tag
but just in case:

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/79

Cheers,
Matt
-- 
Tessares | Belgium | Hybrid Access Solutions
www.tessares.net