netdev - Re: [PATCH v2] fail dentry revalidation after namespace change

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Date:	Fri, 6 Jul 2012 13:44:27 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Thelen <gthelen@...gle.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Tejun Heo <tj@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2] fail dentry revalidation after namespace change

On 07/06/2012 01:37 PM, Eric W. Biederman wrote:
> Glauber Costa <glommer@...allels.com> writes:
> 
>> When we change the namespace tag of a sysfs entry, the associated dentry
>> is still kept around. readdir() will work correctly and not display the
>> old entries, but open() will still succeed, so will reads and writes.
> 
> Note reads and writes of file handles open before the move should
> continue to work.

Well, yes. But do you see it as a big problem?

This can probably be fixed as well, but I foresee a big hackishness in
the way =p
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