Re: [libvirt] [PATCHv6 1/7] qemu: caps: Add capability for change-backing-file command

On 06/26/2014 07:36 AM, Peter Krempa wrote: Upstream qemu.git (and therefore qemu.git) now has everything we need for this; but I'd still rather wait until after the 1.2.6 release (in part so that the active-commit stuff can go in first, to minimize rebase churn): commit fa40e65622352012dccd435147f28161375a6815 Author: Jeff Cody <jcody(a)redhat.com&gt; Date: Tue Jul 1 09:52:16 2014 +0200 block: add QAPI command to allow live backing file change This allows a user to make a live change to the backing file recorded in an open image. The image file to modify can be specified 2 ways: 1) image filename 2) image node-name Note: this does not cause the backing file itself to be reopened; it merely changes the backing filename in the image file structure, and in internal BDS structures. It is the responsibility of the user to pass a filename string that can be resolved when the image chain is reopened, and the filename string is not validated. A good analogy for this command is that it is a live version of 'qemu-img rebase -u', with respect to changing the backing file string. [Jeff is offline so I respun this patch in his absence. Dropped image filename since using node-name is preferred and this is a new command. No need to introduce the limitations of finding images by filename. --Stefan] Reviewed-by: Eric Blake <eblake(a)redhat.com&gt; Reviewed-by: Kevin Wolf <kwolf(a)redhat.com&gt; Signed-off-by: Jeff Cody <jcody(a)redhat.com&gt; Signed-off-by: Stefan Hajnoczi <stefanha(a)redhat.com&gt; -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org