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

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Message-ID: <4714B445.1020900@trash.net>
Date:	Tue, 16 Oct 2007 14:53:25 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	hadi@...erus.ca
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

jamal wrote:

[Can't quote for some reason ..]

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.
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