netdev - Re: [PATCH 2/3] [NET_CLS_ACT] Use skb_act

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Message-Id: <1192540951.4480.108.camel@localhost>
Date:	Tue, 16 Oct 2007 09:22:31 -0400
From:	jamal <hadi@...erus.ca>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	David Miller <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	netdev@...r.kernel.org
Subject: Re: [PATCH 2/3] [NET_CLS_ACT] Use skb_act_clone

On Tue, 2007-16-10 at 14:53 +0200, Patrick McHardy wrote:
> jamal wrote:
> 
> [Can't quote for some reason ..]

Sorry, trying to be clever with git-format-patch but chickened out
sending using git-am - so patch was just attached (Dave seems to be 
friendly to such an approach when he applies)

> I don't think this change is safe since we might loose the
> redirect counter and have endless redirect loops. ipip for
> example calls skb_realloc_headroom, which clones the skb
> when delta > 0, so it seems we really need to copy tc_verd
> in skb_clone(). Generally the assumption that drivers don't
> clone packets doesn't seem safe.

Does the copying of tc_verd in __copy_skb_header() not cover that?

cheers,
jamal


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