netdev - Re: [PATCH v3] tcp: pass back data left in socket after receive

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Message-ID: <38ae32bb-59e5-3e5e-6d22-245e757e428a@kernel.dk>
Date:   Fri, 29 Apr 2022 21:08:14 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>
Subject: Re: [PATCH v3] tcp: pass back data left in socket after receive

On 4/29/22 8:15 PM, Jakub Kicinski wrote:
> On Thu, 28 Apr 2022 18:45:06 -0600 Jens Axboe wrote:
>> This is currently done for CMSG_INQ, add an ability to do so via struct
>> msghdr as well and have CMSG_INQ use that too. If the caller sets
>> msghdr->msg_get_inq, then we'll pass back the hint in msghdr->msg_inq.
>>
>> Rearrange struct msghdr a bit so we can add this member while shrinking
>> it at the same time. On a 64-bit build, it was 96 bytes before this
>> change and 88 bytes afterwards.
>>
>> Reviewed-by: Eric Dumazet <edumazet@...gle.com>
>> Signed-off-by: Jens Axboe <axboe@...nel.dk>
> 
> Commit f94fd25cb0aa ("tcp: pass back data left in socket after
> receive") in net-next now, thanks!

Great, thanks Jakub! I'll base on this for the io_uring change.

-- 
Jens Axboe