linux-kernel - Re: [RFC][Patch 5/5]integrity: IMA as an integrity service provider

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Message-Id: <20080529163501.5a672b8f.akpm@linux-foundation.org>
Date:	Thu, 29 May 2008 16:35:01 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, safford@...son.ibm.com,
	serue@...ux.vnet.ibm.com, sailer@...son.ibm.com, zohar@...ibm.com,
	sds@...ho.nsa.gov, casey@...aufler-ca.com
Subject: Re: [RFC][Patch 5/5]integrity: IMA as an integrity service provider

On Thu, 29 May 2008 17:50:34 -0400
Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:

> 
> On Wed, 2008-05-28 at 20:30 -0700, Andrew Morton wrote:
> 
> > > ...
> > >
> > > > - All the games with mtimes should be described in the changelog too.
> > > 
> > > Ok. The timespec_recent and mtime issues are part of the same problem
> > > of detecting when a file has been modified.
> > 
> > Can't use inode.i_version?
> 
> i_version is now working on my system.

Oh good.

>  It looks good. Is
> there anything that I need to be concerned about, such as
> limited filesystem support or the i_version is not updated 
> by file_close for mmaped files?

erk, I'm not an i_version person.  It seems that it's only used on
directories (to patch up readdir coherency problems) so I guess I
misled you there.

There's file_struct.f_version, which is no good.

i_generation is no good either.

We've documented these things so wonderfully!

i_writecount looks good?
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