netdev - Re: [PATCH] bonding/vlan: Avoid mangled NAs on slaves without VLAN tag insertion

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Date:	Mon, 07 Feb 2011 13:17:54 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	bhutchings@...arflare.com
Cc:	stable@...nel.org, fubar@...ibm.com, netdev@...r.kernel.org,
	bonding-devel@...ts.sourceforge.net
Subject: Re: [PATCH] bonding/vlan: Avoid mangled NAs on slaves without VLAN
 tag insertion

From: Ben Hutchings <bhutchings@...arflare.com>
Date: Mon, 07 Feb 2011 19:20:55 +0000

> This is related to commit f88a4a9b65a6f3422b81be995535d0e69df11bb8
> upstream, but the bug cannot be properly fixed without the other
> changes to VLAN tagging in 2.6.37.
> 
> bond_na_send() attempts to insert a VLAN tag in between building and
> sending packets of the respective formats.  If the slave does not
> implement hardware VLAN tag insertion then vlan_put_tag() will mangle
> the network-layer header because the Ethernet header is not present at
> this point (unlike in bond_arp_send()).
> 
> Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>

Acked-by: David S. Miller <davem@...emloft.net>
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