netdev - Re: [PATCH] iptables: use skb->len for accounting

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Date:	Fri, 23 Jul 2010 14:47:17 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>,
	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] iptables: use skb->len for accounting

On Fri, Jul 23, 2010 at 2:29 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> Le vendredi 23 juillet 2010 à 11:34 +0800, Changli Gao a écrit :
>> iptables: use skb->len for accounting
>>
>> use skb->len for accounting as xt_quota does.
>>
>
> Why ?
>
> This is a gratuitous change, unless you have very strong arguments.
>
> xt_quota is an exception, dont change all others because of it !

exception ? Why ?

>
> It is about actual data on wire, including overhead (excess bytes after
> IP frame if any).
>
> But IP tables accounting is about IP only.
>

Is the assumption that: the packets in netfilter have the padding
bytes removed, and skb->data points to the network header? Thanks.

-- 
Regards,
Changli Gao(xiaosuo@...il.com)
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