From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Jackson <Ian.Jackson@eu.citrix.com>
Subject: Re: hi
Date: Tue, 27 May 2008 11:12:21 +0100
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To: Ben Guthro <bguthro@virtualiron.com>
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Ben Guthro writes ("Re: [Xen-devel] hi"): From the discussions - there
> seemed to be indication that QEMU already supported a
> reverse-engineered format (before MS released specs for VHD) called
> VPC

This is block-vpc.c which is in upstream qemu and also in ioemu.
I haven't checked at all whether the code in qemu upstream works or
has been changed recently.  But that would be the right place to
start.

Because `tap:qcow:...' in Xen config files is implemented in ioemu by
iterating over the image format drivers until one of them recognises
the format, you may well be able to pass a suitable disk image
directly in the xen domain config file - despite it not really being
qcow at all.

Ian.