linux-kernel - Re: [PATCH] vfs: new FROM

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Date:	Tue, 22 Sep 2009 13:28:46 -0400
From:	Eric Paris <eparis@...hat.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	viro@...iv.linux.org.uk
Subject: Re: [PATCH] vfs: new FROM_ACCESS flag

On Tue, 2009-09-22 at 09:56 -0400, Christoph Hellwig wrote:
> On Sun, Sep 20, 2009 at 09:30:48PM -0400, Eric Paris wrote:
> > This new acc_mode flag is just to tell the security system this inode
> > permission check is from the access system call.  The security system can
> > use this information as it finds appropriete.  In particular SELinux plans to
> > use this flag to alter what we choose to audit and what we do not choose to
> > audit.
> 
> I think you're better off splitting the existing MAY_ACCESS flag and
> only using MAY_ACCESS for calles from access() insteaf of introducing
> a FROM_ACCESS flag and causing lots of naming confusion.

What would you think of a new, MUST_REVALIDATE_PERMS which will do what
MAY_ACCESS does today.  MAY_ACCESS would be just for access(2) and would
be the flag that I use for SELinux?

-Eric

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