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

[Martin KaFai Lau]

On 2/28/25 12:53 AM, zhangmingyi wrote:
> From: Mingyi Zhang <zhangmingyi5@xxxxxxxxxx>
>
> 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@xxxxxxxxx/

pw-bot: cr