netdev - Re: [PATCH v2] bonding: ban stacked bonding support

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Message-Id: <20150320.163845.164991966900600650.davem@davemloft.net>
Date:	Fri, 20 Mar 2015 16:38:45 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	adobriyan@...il.com
Cc:	vfalico@...il.com, andy@...yhouse.net, netdev@...r.kernel.org,
	jay.vosburgh@...onical.com
Subject: Re: [PATCH v2] bonding: ban stacked bonding support

From: Alexey Dobriyan <adobriyan@...il.com>
Date: Fri, 20 Mar 2015 20:46:38 +0300

> If you add bonding master as a slave, and then release it,
> it will no longer be an IFF_BONDING creating problems like described at
> https://bugzilla.kernel.org/show_bug.cgi?id=89541
> 
> 	echo +bond1 >/sys/class/net/bonding_masters
> 	echo 1 >/sys/class/net/bond1/bonding/mode
> 	echo +bond2 >/sys/class/net/bonding_masters
> 	echo +bond2 >/sys/class/net/bond1/bonding/slaves
> 	echo -bond2 >/sys/class/net/bond1/bonding/slaves
> 	echo -bond2 >/sys/class/net/bonding_masters
> 
> 	cat /proc/net/bonding/bond2	# should not exist
> 		[oops]
> 
> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>

I feel like this has been brought up before and it was stated that
some people are actually using things like this.

I could be mistaken.
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