linux-kernel - Re: [PATCH] [Bug 16494] NFS client over TCP hangs due to packet loss

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Message-Id: <20100803.012144.267950450.davem@davemloft.net>
Date:	Tue, 03 Aug 2010 01:21:44 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	andyc.bluearc@...il.com
Cc:	kuznet@....inr.ac.ru, pekkas@...core.fi, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, eric.dumazet@...il.com,
	William.Allen.Simpson@...il.com, gilad@...efidence.com,
	ilpo.jarvinen@...sinki.fi, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: [PATCH] [Bug 16494] NFS client over TCP hangs due to packet
 loss

From: "Andy Chittenden" <andyc.bluearc@...il.com>
Date: Tue, 3 Aug 2010 09:14:31 +0100

> I don't know whether this patch is the correct fix or not but it enables the
> NFS client to recover.
> 
> Kernel version: 2.6.34.1 and 2.6.32.
> 
> Fixes <https://bugzilla.kernel.org/show_bug.cgi?id=16494>. It clears down
> any previous shutdown attempts so that reconnects on a socket that's been
> shutdown leave the socket in a usable state (otherwise tcp_sendmsg() returns
> -EPIPE).

If the SunRPC code wants to close a TCP socket then use it again,
it should disconnect by doing a connect() with sa_family == AF_UNSPEC
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