netdev - Re: [PATCH v6 6/8] io_uring/cmd: Introduce SOCKET_URING_OP

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Date: Wed, 13 Sep 2023 13:37:39 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Breno Leitao <leitao@...ian.org>, sdf@...gle.com, asml.silence@...il.com,
 willemdebruijn.kernel@...il.com, kuba@...nel.org, pabeni@...hat.com,
 martin.lau@...ux.dev, krisman@...e.de
Cc: bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
 netdev@...r.kernel.org, io-uring@...r.kernel.org
Subject: Re: [PATCH v6 6/8] io_uring/cmd: Introduce SOCKET_URING_OP_GETSOCKOPT

On 9/13/23 1:36 PM, Jens Axboe wrote:
> On 9/13/23 9:27 AM, Breno Leitao wrote:
>> Add support for getsockopt command (SOCKET_URING_OP_GETSOCKOPT), where
>> level is SOL_SOCKET. This is similar to the getsockopt(2) system
>> call, and both parameters are pointers to userspace.
>>
>> Important to say that userspace needs to keep the pointer alive until
>> the CQE is completed.
> 
> Since it's holding the data needed, this is true for any request that
> is writing data. IOW, this is not unusual and should be taken for
> granted. I think this may warrant a bit of rewording if the patch is
> respun, if not then just ignore it.

reads data of course, writing into the userspace buffer.

-- 
Jens Axboe