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Date:   Wed, 22 Jul 2020 17:01:12 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH net-next v5] net: dccp: Add SIOCOUTQ IOCTL support
 (send buffer fill)

From: Richard Sailer <>
Date: Mon, 20 Jul 2020 18:06:14 +0200

> This adds support for the SIOCOUTQ IOCTL to get the send buffer fill
> of a DCCP socket, like UDP and TCP sockets already have.
> Regarding the used data field: DCCP uses per packet sequence numbers,
> not per byte, so sequence numbers can't be used like in TCP. sk_wmem_queued
> is not used by DCCP and always 0, even in test on highly congested paths.
> Therefore this uses sk_wmem_alloc like in UDP.
> Signed-off-by: Richard Sailer <>
> ---
> v5: More infos into dccp.rst, +empty line after declarations

Applied, but I wonder if you'll also need something like tcp's SIOCOUTQNSD?

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