netdev - Re: [PATCH net] tcp: allow MSG_ZEROCOPY transmission also in CLOSE

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Date:   Tue, 15 Jan 2019 21:44:39 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     willemdebruijn.kernel@...il.com
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, willemb@...gle.com,
        marek@...udflare.com, ycheng@...gle.com, ncardwell@...gle.com,
        soheil@...gle.com, alexey.kodanev@...cle.com
Subject: Re: [PATCH net] tcp: allow MSG_ZEROCOPY transmission also in
 CLOSE_WAIT state

From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Date: Thu, 10 Jan 2019 14:40:33 -0500

> From: Willem de Bruijn <willemb@...gle.com>
> 
> TCP transmission with MSG_ZEROCOPY fails if the peer closes its end of
> the connection and so transitions this socket to CLOSE_WAIT state.
> 
> Transmission in close wait state is acceptable. Other similar tests in
> the stack (e.g., in FastOpen) accept both states. Relax this test, too.
> 
> Link: https://www.mail-archive.com/netdev@vger.kernel.org/msg276886.html
> Link: https://www.mail-archive.com/netdev@vger.kernel.org/msg227390.html
> Fixes: f214f915e7db ("tcp: enable MSG_ZEROCOPY")
> Reported-by: Marek Majkowski <marek@...udflare.com>
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>

Applied and queued up for -stable.