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Date:	Mon, 16 Jun 2008 15:17:36 +0400
From:	Pavel Emelyanov <>
To:	Patrick McHardy <>
CC:	Alexey Dobriyan <>,,,,
Subject: Re: unlock iptables in netns

Patrick McHardy wrote:
> Alexey Dobriyan wrote:
>> On Mon, Jun 16, 2008 at 12:26:03PM +0200, Patrick McHardy wrote:
>>> By the way, is there already work done for conntrack/NAT namespace
>>> support? I have this patch that uses marks for something very similar
>>> that should be easy to adjust.
>> Yes, right now I'm fighting something which looks like double free
>> of conntrack during clone(CLONE_NEWNET)/exit test despite none created
>> in netns. And unknown to me dimensions of input and output packet codepaths.
>> :^)
>> Preliminaty details:
>> 	struct nf_conn::ct_net which pins netns
>  From the VLAN code, I thought namespaces could also be identified
> numerically. That would reduce the size increase of struct nf_conn.

Numerically? I made VLAN-s netnsization, but everything was spinning
around the struct net *pointer*. Can you elaborate on this?

>> 	netns of expectation is netns of master conntrack by definition
>> 	per-netns conntrack hash
>> 	per-netns expect hash
>> 	per-netns unconfirmed list
> That all makes sense.

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