linux-kernel - Re: [PATCH 01/11] Security: Add hook to get full maclabel xattr name

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Message-ID: <20080229010055.GA26176@infradead.org>
Date:	Thu, 28 Feb 2008 20:00:55 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Dave Quigley <dpquigl@...ho.nsa.gov>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Stephen Smalley <sds@...ho.nsa.gov>, casey@...aufler-ca.com,
	viro@....linux.org.uk, trond.myklebust@....uio.no,
	bfields@...ldses.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	LSM List <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH 01/11] Security: Add hook to get full maclabel xattr
	name

On Thu, Feb 28, 2008 at 07:32:47PM -0500, Dave Quigley wrote:
> I can always go with the original hook name of get_security_xattr_name
> which turns into a security_get_security_xattr_name call which seems a
> bit ludicrous. The only other complaint that I saw from Casey besides
> the name of the function was that there could be more than one xattr. If
> we want to address that then I need another hook that says give me all
> data that the LSM deems important for this file. Which is essentially
> the same thing as taking each of the xattr names that the module will
> provide, grabbing each of them in turn, and concatenating them together.
> For SELinux this is no different than getsecurity with the selinux
> suffix. The same goes for SMACK.

What about Casey's suggestion of get_security_blob?  For any reasonable
module that just has a single xattr it's trivial and for those that
have multiple or a different storage model it might get complicated
but that's not our problem for now.
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