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Date:   Fri, 29 Apr 2022 21:08:14 -0600
From:   Jens Axboe <>
To:     Jakub Kicinski <>
Cc:     netdev <>,
        Eric Dumazet <>,
        Neal Cardwell <>
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 <>
>> Signed-off-by: Jens Axboe <>
> 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

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