linux-kernel - Re: [tpmdd-devel] [PATCH] TPM: Let the tpm char device be openable multiple times

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Message-ID: <20091103174644.GO7768@obsidianresearch.com>
Date:	Tue, 3 Nov 2009 10:46:44 -0700
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	Hal Finney <hal.finney@...il.com>
Cc:	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	srajiv@...ux.vnet.ibm.com
Subject: Re: [tpmdd-devel] [PATCH] TPM: Let the tpm char device be openable
	multiple times

On Tue, Nov 03, 2009 at 09:31:55AM -0800, Hal Finney wrote:
> What if you don't want it accessible by user mode apps, you only want
> your middleware (ie tcs daemon, tcsd) to open it? Will this still
> allow that to be enforced, so nobody can interfere with tcsd's
> exclusive access to the device?

I did not attempt to implement something like that. Most cases in
Linux seem to leave that to user space..

Jason
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