netdev - Re: [PATCH 0/4][RFC] netns: sysfs: add a netns suffix to net device sysfs entries

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Date:	Thu, 23 Oct 2008 13:56:33 +0200
From:	Benjamin Thery <benjamin.thery@...l.net>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	netdev <netdev@...r.kernel.org>, Dave Miller <davem@...emloft.net>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Al Viro <viro@....linux.org.uk>,
	Serge Hallyn <serue@...ibm.com>,
	Daniel Lezcano <dlezcano@...ibm.com>,
	linux-kernel@...r.kernel.org, Tejun Heo <htejun@...il.com>,
	Denis Lunev <den@...nvz.org>,
	Linux Containers <containers@...ts.linux-foundation.org>
Subject: Re: [PATCH 0/4][RFC] netns: sysfs: add a netns suffix to net device
 sysfs entries

Eric W. Biederman wrote:
> Benjamin Thery <benjamin.thery@...l.net> writes:
> 
>> Support for network namespaces in mainline is pretty complete for
>> some time now, but there is still this issue with sysfs that prevents 
>> more people to use it easily.
> 
> Ben your patchset is completely inappropriate.
> 
> Temporarily adding elements to the ABI that we intend to remove
> is not a proper solution to this problem.

In fact, I feared that would be an issue before I sent the patches.
Thanks for confirming this.

But, as this alternative was discussed a bit after Al's comments on your
last patches, I had to give it a try and code a proof-of-concept.

Benjamin

> 
> That user space visible ida you add is a namespace identifier that breaks
> nested containers and migration.  It is very very very wrong.
> 
> Eric
> 
> 
> 


-- 
B e n j a m i n   T h e r y  - BULL/DT/Open Software R&D

    http://www.bull.com
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