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Message-ID: <272ceaca-3e53-45ae-bbd4-2590f36c7ef8@kernel.dk>
Date: Fri, 28 Mar 2025 08:30:16 -0600
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Subject: Re: SOCKET_URING_OP_GETSOCKOPT SOL_SOCKET restriction
To: Stefan Metzmacher <metze@samba.org>
Cc: io-uring <io-uring@vger.kernel.org>
References: <a41d8ee5-e859-4ec6-b01f-c0ea3d753704@samba.org>
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From: Jens Axboe <axboe@kernel.dk>
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On 3/28/25 8:27 AM, Stefan Metzmacher wrote:
> Hi Jens,
>
> while playing with the kernel QUIC driver [1],
> I noticed it does a lot of getsockopt() and setsockopt()
> calls to sync the required state into and out of the kernel.
>
> My long term plan is to let the userspace quic handshake logic
> work with SOCKET_URING_OP_GETSOCKOPT and SOCKET_URING_OP_SETSOCKOPT.
>
> The used level is SOL_QUIC and that won't work
> as io_uring_cmd_getsockopt() has a restriction to
> SOL_SOCKET, while there's no restriction in
> io_uring_cmd_setsockopt().
>
> What's the reason to have that restriction?
> And why is it only for the get path and not
> the set path?
There's absolutely no reason for that, looks like a pure oversight?!
--
Jens Axboe