linux-kernel - Re: [CRIU] [PATCH 3/3] tcp: add ability to restore a fin packet

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Date:	Fri, 21 Mar 2014 10:04:07 -0400
From:	Christopher Covington <cov@...eaurora.org>
To:	Andrey Vagin <avagin@...nvz.org>
CC:	linux-kernel@...r.kernel.org,
	Pavel Emelyanov <xemul@...allels.com>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	netdev@...r.kernel.org, James Morris <jmorris@...ei.org>,
	Patrick McHardy <kaber@...sh.net>, criu@...nvz.org,
	Eric Dumazet <edumazet@...gle.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [CRIU] [PATCH 3/3] tcp: add ability to restore a fin packet

On 03/21/2014 09:33 AM, Andrey Vagin wrote:
> It's required for restoring sockets in closing states:
> TCP_FIN_WAIT{1,2}, TCP_WAIT_STOP, TCP_CLOSING, TCP_LAST_ACK.
> 
> A fin packet is restored by sending a control message (ancillary data).
> In which queue a packet is restored depends on a value of
> tp->repair_queue.
> 
> This interface is choosen, because we are goint to use sendmsg for

Nit: chosen, going

> --- a/include/uapi/linux/tcp.h
> +++ b/include/uapi/linux/tcp.h
> @@ -199,4 +199,7 @@ struct tcp_md5sig {
>  	__u8	tcpm_key[TCP_MD5SIG_MAXKEYLEN];		/* key (binary) */
>  };
>  
> +/* Conntroll message types to repair tcp connections */

Nit: Control

Christopher

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