linux-kernel - Re: [PATCH 13/18] ima: use generic_file

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Message-ID: <1278595102.3313.36.camel@localhost.localdomain>
Date:	Thu, 08 Jul 2010 09:18:22 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-kernel@...r.kernel.org, John Kacur <jkacur@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Christoph Hellwig <hch@....de>, Mimi Zohar <zohar@...ibm.com>,
	James Morris <jmorris@...ei.org>,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH 13/18] ima: use generic_file_llseek for securityfs

On Thu, 2010-07-08 at 15:00 +0200, Arnd Bergmann wrote:
> On Thursday 08 July 2010, Mimi Zohar wrote:
> > On Wed, 2010-07-07 at 23:40 +0200, Arnd Bergmann wrote:
> > > The default for llseek will change to no_llseek,
> > > so securityfs users need to add explicit .llseek
> > > assignments. Since we're dealing with regular
> > > files from a VFS perspective, use generic_file_llseek.
> > 
> > As both the 'violations' and 'runtime_measurement_counts' are single
> > values and 'policy' doesn't support read, this patch doesn't hurt, but
> > adding .llseek is probably unnecessary.
> 
> Ok, thanks for the confirmation.
> 
> Are you applying the patch in your tree, or should I keep it in my
> series?

I'll leave that up to James.

> Note that while it may not be necessary to add these specific .llseek
> operations, the reason I'm doing it is because I want to provably
> have a .llseek operation in every file_operation in the kernel before
> the default gets changed.
> 
> 	Arnd

Thanks for the clarification.

Mimi

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