netdev - Re: [PATCH v2] tcp: pass back data left in socket after receive

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Date:   Thu, 28 Apr 2022 16:22:52 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     netdev <netdev@...r.kernel.org>, Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCH v2] tcp: pass back data left in socket after receive

On Thu, Apr 28, 2022 at 4:13 PM Jens Axboe <axboe@...nel.dk> 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.
>
> Signed-off-by: Jens Axboe <axboe@...nel.dk>
> ---


SGTM, thanks.

Reviewed-by: Eric Dumazet <edumazet@...gle.com>