From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752212Ab1JNPrw (ORCPT ); Fri, 14 Oct 2011 11:47:52 -0400 Received: from li9-11.members.linode.com ([67.18.176.11]:57734 "EHLO test.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751703Ab1JNPru (ORCPT ); Fri, 14 Oct 2011 11:47:50 -0400 Date: Fri, 14 Oct 2011 11:47:25 -0400 From: "Ted Ts'o" To: Dave Chinner Cc: dave@jikos.cz, Hugo Mills , Kay Sievers , Alan Cox , linux-kernel@vger.kernel.org, lennart@poettering.net, harald@redhat.com, david@fubar.dk, greg@kroah.com, Chris Mason , Btrfs mailing list Subject: Re: A Plumber???s Wish List for Linux Message-ID: <20111014154725.GB13119@thunk.org> Mail-Followup-To: Ted Ts'o , Dave Chinner , dave@jikos.cz, Hugo Mills , Kay Sievers , Alan Cox , linux-kernel@vger.kernel.org, lennart@poettering.net, harald@redhat.com, david@fubar.dk, greg@kroah.com, Chris Mason , Btrfs mailing list References: <1317943022.1095.25.camel@mop> <20111007111231.6e11d18e@lxorguk.ukuu.org.uk> <20111007113820.3b8424a8@lxorguk.ukuu.org.uk> <20111007152137.GE28351@carfax.org.uk> <20111010111813.GF17912@twin.jikos.cz> <4C18E3B8-FA7E-4BC1-BE5D-B517004321A2@mit.edu> <20111013002839.GL3159@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20111013002839.GL3159@dastard> User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on test.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 13, 2011 at 11:28:39AM +1100, Dave Chinner wrote: > Yup. xfs_admin already provides an interface for offline > modification of the UUID for XFS filesytems. I.e. clone the > filesytem using xfs_copy, then run xfs_admin -U generate to > generate a new uuid in the cloned copy before you mount the > clone.... This is probably another thing which perhaps Ric Wheeler's proposed "generic LVM / file system management front end" should abstract away, since every single file system has a different way of setting the UUID in an off-line way. It's a relatively specialized feature, so I wouldn't call it high priority to implement first. - Ted