From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Myers Subject: [LSF/MM TOPIC][ATTEND] protection information and userspace Date: Wed, 6 Feb 2013 13:51:22 -0600 Message-ID: <20130206195122.GA30652@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from relay1.sgi.com ([192.48.179.29]:50067 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758298Ab3BFTvY (ORCPT ); Wed, 6 Feb 2013 14:51:24 -0500 Content-Disposition: inline Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: lsf-pc@lists.linux-foundation.org Cc: linux-fsdevel@vger.kernel.org, linux-scsi@vger.kernel.org, martin.petersen@oracle.com Hi, I'm interested in discussing how to pass protection information to and from userspace. Maybe Martin could be enlisted for the discussion. I read that some work has already been done in this area but have not been able to locate it. It looks like the bio-integrity code already makes it possible to generate the t10-dif crc in the filesystem. It would be good to be able to get the guard and application tags back out to backup applications such as xfsdump. Enabling other applications to generate their own tags in userspace is also interesting. Regards, Ben