linux-kernel - Re: [PATCH 0/2] Fix /proc/net in presence of net namespaces

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Message-ID: <47C7B7C3.4000504@openvz.org>
Date:	Fri, 29 Feb 2008 10:44:03 +0300
From:	Pavel Emelyanov <xemul@...nvz.org>
To:	serge@...lyn.com
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Alexey Dobriyan <adobriyan@...nvz.org>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] Fix /proc/net in presence of net namespaces

>> Nack.  Yet another global set of ids that require us to implement another
>> namespace looks like the wrong way to go.
> 
> Sentiment granted, but I'm not sure it can be an issue.  It *could* be
> in issue if we moved to a more flexible access control here here any
> netns could access the .netns/N directories for all it's child
> namespaces.
> 
> But it can't, and /proc/net is set by the kernel.  So the <id> can't be
> an issue for any checkpoint/restart except htat of the whole system, and
> of course on whole-system resume we have no <id> collision worries.
> 
> So userspace can't do anything with <id>, so there is no reason to worry
> about it becoming another namespace?
> 
> Right?

Right. Thanks, Serge.

> thanks,
> -serge
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