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>:
>> 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
Rich.
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