Re: [Libguestfs] [Qemu-devel] [qemu-img] support for XVA

On Wed, Nov 15, 2017 at 09:07:12PM +0100, Max Reitz wrote: > On 2017-11-15 21:06, Gandalf Corvotempesta wrote: >> 2017-11-15 20:59 GMT+01:00 Max Reitz <mreitz(a)redhat.com&gt;: >>> Well, you can't just add support to qemu-img alone either. Every image >>> format supported by qemu-img is one supported by qemu as a whole and >>> thus needs a proper block driver that needs to support random accesses >>> as well. >> >> I was talking about qemu-img convert, just to convert an XVA image to >> something different, in a single pass, without having to extract the >> tar. > > I know, but that doesn't work. qemu-img convert uses the normal > general-purpose block drivers for that. In any case there's no need as qemu/qemu-img can already access files inside an uncompressed tarball using the offset/size support added to the raw driver exactly for this purpose: https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg03945.html