linux-kernel - Re: [PATCH bpf-next/net v2 0/7] bpf: Add mptcp_subflow bpf

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Message-ID: <1ff05fca-28ff-491e-ab4e-b562d310359b@kernel.org>
Date: Wed, 15 Jan 2025 10:39:57 +0100
From: Matthieu Baerts <matttbe@...nel.org>
To: Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>,
 Martin KaFai Lau <martin.lau@...ux.dev>, Eduard Zingerman
 <eddyz87@...il.com>, Song Liu <song@...nel.org>,
 Yonghong Song <yonghong.song@...ux.dev>,
 John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>,
 Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>,
 Jiri Olsa <jolsa@...nel.org>, Mykola Lysenko <mykolal@...com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
 Martin KaFai Lau <martin.lau@...nel.org>, mptcp@...ts.linux.dev,
 Mat Martineau <martineau@...nel.org>, Geliang Tang <geliang@...nel.org>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Simon Horman <horms@...nel.org>, Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH bpf-next/net v2 0/7] bpf: Add mptcp_subflow bpf_iter
 support

Hello BPF maintainers and reviewers,

On 19/12/2024 16:46, Matthieu Baerts (NGI0) wrote:
> Here is a series from Geliang, adding mptcp_subflow bpf_iter support.
> 
> We are working on extending MPTCP with BPF, e.g. to control the path
> manager -- in charge of the creation, deletion, and announcements of
> subflows (paths) -- and the packet scheduler -- in charge of selecting
> which available path the next data will be sent to. These extensions
> need to iterate over the list of subflows attached to an MPTCP
> connection, and do some specific actions via some new kfunc that will be
> added later on.

(...)

> Changes in v2:
> - Patches 1-2: new ones.
> - Patch 3: remove two kfunc, more restrictions. (Martin)
> - Patch 4: add BUILD_BUG_ON(), more restrictions. (Martin)
> - Patch 7: adaptations due to modifications in patches 1-4.
> - Link to v1: https://lore.kernel.org/r/20241108-bpf-next-net-mptcp-bpf_iter-subflows-v1-0-cf16953035c1@kernel.org

The v2 of this series didn't get any reviews, probably because it has
been sent the week before Xmas. Do you prefer if I resend it?

There is no hurry, I can also re-send it later if "now" is not a good time.

Cheers,
Matt
-- 
Sponsored by the NGI0 Core fund.