netdev - Re: [patch 1/6] ctnetlink: add callbacks to the per-proto nlattrs

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Message-ID: <49CA690F.20107@trash.net>
Date:	Wed, 25 Mar 2009 18:25:35 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Holger Eitzenberger <holger@...zenberger.org>
CC:	David Miller <davem@...emloft.net>,
	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [patch 1/6] ctnetlink: add callbacks to the per-proto nlattrs

Holger Eitzenberger wrote:
> There is added a single callback for the l3 proto helper.  The two
> callbacks for the l4 protos are necessary because of the general
> structure of a ctnetlink event, which is in short:
> 
>  CTA_TUPLE_ORIG
>    <l3/l4-proto-attributes>
>  CTA_TUPLE_REPLY
>    <l3/l4-proto-attributes>
>  CTA_ID
>  ...
>  CTA_PROTOINFO
>    <l4-proto-attributes>
>  CTA_TUPLE_MASTER
>    <l3/l4-proto-attributes>
> 
> Therefore the formular is
> 
>  size := sizeof(generic-nlas) + 3 * sizeof(tuple_nlas) + sizeof(protoinfo_nlas)
> 
> Some of the NLAs are optional, e. g. CTA_TUPLE_MASTER, which is only
> set if it's an expected connection.  But the number of optional NLAs is
> small enough to prevent netlink_trim() from reallocating if calculated
> properly.

Applied, thanks.
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