linux-kernel - Re: [PATCH v7 01/11] bpf: Add sockptr support for getsockopt

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Message-ID: <97a90b2d-cdc3-ac00-b1d7-1e735648ca8b@linux.dev>
Date:   Thu, 19 Oct 2023 12:24:42 -0700
From:   Martin KaFai Lau <martin.lau@...ux.dev>
To:     Breno Leitao <leitao@...ian.org>
Cc:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, io-uring@...r.kernel.org, sdf@...gle.com,
        axboe@...nel.dk, asml.silence@...il.com,
        willemdebruijn.kernel@...il.com, kuba@...nel.org,
        pabeni@...hat.com, krisman@...e.de,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Song Liu <song@...nel.org>,
        Yonghong Song <yonghong.song@...ux.dev>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Hao Luo <haoluo@...gle.com>,
        Jiri Olsa <jolsa@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH v7 01/11] bpf: Add sockptr support for getsockopt

On 10/16/23 6:47 AM, Breno Leitao wrote:
> The whole network stack uses sockptr, and while it doesn't move to
> something more modern, let's use sockptr in getsockptr BPF hooks, so, it
> could be used by other callers.
> 
> The main motivation for this change is to use it in the io_uring
> {g,s}etsockopt(), which will use a userspace pointer for *optval, but, a
> kernel value for optlen.

Acked-by: Martin KaFai Lau <martin.lau@...nel.org>