netdev - Re: [PATCH] net sched: fix race in mirred device removal

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Message-Id: <20100724.210446.115927978.davem@davemloft.net>
Date:	Sat, 24 Jul 2010 21:04:46 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...tta.com
Cc:	hadi@...erus.ca, netdev@...r.kernel.org
Subject: Re: [PATCH] net sched: fix race in mirred device removal

From: Stephen Hemminger <shemminger@...tta.com>
Date: Thu, 22 Jul 2010 21:45:04 -0700

> This fixes hang when target device of mirred packet classifier
> action is removed.
> 
> If a mirror or redirection action is configured to cause packets
> to go to another device, the classifier holds a ref count, but was assuming
> the adminstrator cleaned up all redirections before removing. The fix
> is to add a notifier and cleanup during unregister.
> 
> The new list is implicitly protected by RTNL mutex because
> it is held during filter add/delete as well as notifier.
> 
> Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
> Acked-by: Jamal Hadi Salim <hadi@...erus.ca>

Applied to net-2.6, thanks.
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