linux-kernel - Re: [AppArmor 39/45] AppArmor: Profile loading and manipulation, pathname matching

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Message-ID: <Line.LNX.4.64.0706152122520.29737@localhost.localdomain>
Date:	Fri, 15 Jun 2007 21:41:01 -0400 (EDT)
From:	James Morris <jmorris@...ei.org>
To:	david@...g.hm
cc:	Greg KH <greg@...ah.com>, Crispin Cowan <crispin@...ell.com>,
	Pavel Machek <pavel@....cz>,
	Andreas Gruenbacher <agruen@...e.de>,
	Stephen Smalley <sds@...ho.nsa.gov>, jjohansen@...e.de,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [AppArmor 39/45] AppArmor: Profile loading and manipulation,
 pathname matching

On Fri, 15 Jun 2007, david@...g.hm wrote:

> on the contrary, useing 'mv' is by far the cleanest way to do this.
> 
> mv htdocs htdocs.old;mv htdocs.new htdocs
> 
> this makes two atomic changes to the filesystem, but can generate thousands to
> millions of permission changes as a result.

OTOH, you've performed your labeling up front, and don't have to 
effectively relabel each file each time on each access, which is what 
you're really doing with pathname labeling.



- James
-- 
James Morris
<jmorris@...ei.org>
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