netdev - Re: [PATCH net-next 0/6] TCP connection repair (v4)

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Message-Id: <20120421.155354.769351486098851306.davem@davemloft.net>
Date:	Sat, 21 Apr 2012 15:53:54 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	xemul@...allels.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/6] TCP connection repair (v4)

From: Pavel Emelyanov <xemul@...allels.com>
Date: Thu, 19 Apr 2012 17:38:58 +0400

> Attempt #4 with an API for TCP connection recreation (previous one is
> at http://lists.openwall.net/netdev/2012/03/28/84) re-based on the
> today's net-next tree.
> 
> Changes since v3:
> 
> * Added repair for TCP options negotiated during 3WHS process, pointed
>   out by Li Yu. The explanation of how this happens is in patch #6.
> 
> * Named constant for sk_reuse values as proposed by Ben Hutching.
> 
> * Off-by-one in repair-queue sockoption caught by Ben.

All applied to net-next, nice work.

Please make the following fix for me.  The option recovery code will
result in unaligned accesses, for example you'll do a byte aligned
get_user() for the u16 MSS object in many cases, and this will trap
and cpus such as sparc.

Either add a padding facility or pass more structured data into the
socket option.

Thanks.
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