netdev - Re: [PATCH bpf-next v4 0/2] Introduced to support the ULP to get or set sockets

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Message-ID: <5ef054b4-3340-4b0e-9ba6-7b7409f9eb71@linux.dev>
Date: Fri, 28 Feb 2025 12:08:18 -0800
From: Martin KaFai Lau <martin.lau@...ux.dev>
To: zhangmingyi <zhangmingyi5@...wei.com>
Cc: ast@...nel.org, daniel@...earbox.net, andrii@...nel.org, song@...nel.org,
 yhs@...com, john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
 haoluo@...gle.com, jolsa@...nel.org, bpf@...r.kernel.org,
 linux-kernel@...r.kernel.org, yanan@...wei.com, wuchangye@...wei.com,
 xiesongyang@...wei.com, liuxin350@...wei.com, liwei883@...wei.com,
 tianmuyang@...wei.com, Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCH bpf-next v4 0/2] Introduced to support the ULP to get or
 set sockets

On 2/28/25 12:53 AM, zhangmingyi wrote:
> From: Mingyi Zhang <zhangmingyi5@...wei.com>
> 
> We want call bpf_setsockopt to replace the kernel module in the TCP_ULP
> case. The purpose is to customize the behavior in connect and sendmsg
> after the user-defined ko file is loaded. We have an open source
> community project kmesh (kmesh.net). Based on this, we refer to some
> processes of tcp fastopen to implement delayed connet and perform HTTP
> DNAT when sendmsg.In this case, we need to parse HTTP packets in the
> bpf program and set TCP_ULP for the specified socket.
> 
> Note that tcp_getsockopt and tcp_setsockopt support TCP_ULP, while
> bpf_getsockopt and bpf_setsockopt do not support TCP_ULP.
> I'm not sure why there is such a difference, but I noticed that
> tcp_setsockopt is called in bpf_setsockopt.I think we can add the
> handling of this case.

Please stop sending multiple new versions while the earlier raised questions
still have not been replied [1]. Also, netdev is still not cc-ed.

[1]: https://lore.kernel.org/all/44668201-cf8b-49c1-9dd0-90e0e5a95457@linux.dev/

pw-bot: cr