On 2017-11-15 21:24, Richard W.M. Jones wrote:
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@redhat.com>:
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
If that works, yes. To me it doesn't look like XVA is just a single raw image inside of a tarball, but I may very well be wrong, of course. Max