Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934301AbZIDVXf (ORCPT ); Fri, 4 Sep 2009 17:23:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934254AbZIDVXc (ORCPT ); Fri, 4 Sep 2009 17:23:32 -0400 Received: from 139-142-54-143.atc.vaillant.ca ([139.142.54.143]:55124 "EHLO quartz.edm.orcorp.ca" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934025AbZIDVXc (ORCPT ); Fri, 4 Sep 2009 17:23:32 -0400 Date: Fri, 4 Sep 2009 15:23:16 -0600 From: Jason Gunthorpe To: Andrew Morton Cc: Roland Dreier , tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, srajiv@linux.vnet.ibm.com, debora@linux.vnet.ibm.com, m.selhorst@sirrix.com, jmorris@namei.org, jbeulich@novell.com Subject: Re: [PATCH] TPM: Fixup pubek sysfs file Message-ID: <20090904212316.GZ406@obsidianresearch.com> References: <20090904045231.GW4973@obsidianresearch.com> <20090904140325.c592289a.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090904140325.c592289a.akpm@linux-foundation.org> User-Agent: Mutt/1.5.18 (2008-05-17) X-Broken-Reverse-DNS: no host name found for IP address 10.0.0.11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4119 Lines: 94 On Fri, Sep 04, 2009 at 02:03:25PM -0700, Andrew Morton wrote: > On Thu, 03 Sep 2009 22:02:24 -0700 > Roland Dreier wrote: > > > > > > Algorithm: 00 00 00 01 > > > Encscheme: 00 03 > > > Sigscheme: 00 01 > > > Parameters: 00 00 08 00 00 00 00 02 00 00 00 00 > > > Modulus length: 256 > > > > No argument that this fix is an improvement, but what happened to the > > "one value per file" rule for sysfs?? > > We goofed. This one snuck through. > > It's one of the reasons why I recommend that people cite examples of > the sysfs/procfs output in changelogs. These things are part of the > kernel ABI and once they go in we cannot change them so we have to get > them right first time. Several of the sysfs files in the TPM driver are goofed: /sys/devices/platform/tpm_tis.0 # cat caps Manufacturer: 0x57454300 TCG version: 1.2 Firmware version: 2.16 /sys/devices/platform/tpm_tis.0 # cat pcrs PCR-00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-01: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-02: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-03: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-04: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-05: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-06: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-07: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-08: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-09: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-11: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-12: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-13: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-14: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-15: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-16: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 PCR-17: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF PCR-18: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF PCR-19: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF PCR-20: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF PCR-21: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF PCR-22: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF PCR-23: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 /sys/devices/platform/tpm_tis.0 # cat pubek Algorithm: 00 00 00 01 Encscheme: 00 03 Sigscheme: 00 01 Parameters: 00 00 08 00 00 00 00 02 00 00 00 00 Modulus length: 256 Modulus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t least this has been like this since before the git history, so it isn't recent.. Can these be scheduled for removal or some such process? I haven't seen anything actually using the files, the only one that is really useful is caps... They probably should have been in debugfs, had it existed at the time. Thanks, Jason -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/