From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756204AbZEUTVq (ORCPT ); Thu, 21 May 2009 15:21:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753362AbZEUTVg (ORCPT ); Thu, 21 May 2009 15:21:36 -0400 Received: from alerce.vps.bitfolk.com ([212.13.194.134]:2096 "EHLO alerce.vps.bitfolk.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753352AbZEUTVf (ORCPT ); Thu, 21 May 2009 15:21:35 -0400 Date: Thu, 21 May 2009 16:17:04 -0300 From: Alberto Bertogli To: Greg Freemyer Cc: linux-kernel@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, agk@redhat.com, neilb@suse.de Subject: Re: [RFC PATCH] dm-csum: A new device mapper target that checks data integrity Message-ID: <20090521191704.GX1376@blitiri.com.ar> References: <20090521161317.GU1376@blitiri.com.ar> <87f94c370905211117y13758f72i2ea113c9c6771061@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87f94c370905211117y13758f72i2ea113c9c6771061@mail.gmail.com> User-Agent: Mutt/1.5.17 (2008-03-04) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 21, 2009 at 02:17:58PM -0400, Greg Freemyer wrote: > On Thu, May 21, 2009 at 12:13 PM, Alberto Bertogli > wrote: > > I'm writing this device mapper target that stores checksums on writes and > > verifies them on reads. > > I have not looked at your patch, but does this tie into the integrity > logic that was added to mainline a few months ago? At the moment it has no relation, but making dm-csum devices register with the bio integrity extensions is on my to-do list, and the on-disk format already reserves 32 bits for every 512-byte sector for tagging purposes. Thanks, Alberto