linux-kernel - Re: problem with IPoA (CLIP), NAT, and VLANS

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Message-ID: <20090217133707.GA6802@ff.dom.local>
Date:	Tue, 17 Feb 2009 13:37:07 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Karl Hiramoto <karl@...amoto.org>
Cc:	netdev@...r.kernel.org, netfilter@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: problem with IPoA (CLIP),  NAT, and VLANS

On Tue, Feb 17, 2009 at 01:53:25PM +0100, Karl Hiramoto wrote:
> Jarek Poplawski wrote:
> > On Tue, Feb 17, 2009 at 12:49:07PM +0100, Karl Hiramoto wrote:
> > ...
> >   
> >> A side note:  so far the original patch i sent works in all cases i have
> >> tested, but fails with tcpdump.   I suspect its because the skb gets cloned.

Hmm... I would like to make sure: if tcpdump breaks it too, then
we don't need to blame skb_cow_head(), do we? If it's like this then
it looks like the driver's problem with copied/cloned skbs?! (Maybe
because some "private" offset is overwritten?)

Jarek P.
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