Re: [Qemu-devel] [RFC] qed: Add QEMU Enhanced Disk format

[Christoph Hellwig]

On Tue, Sep 07, 2010 at 11:12:15AM -0500, Anthony Liguori wrote:
> IOW, what are valid values for backing_fmt?  "raw" and "qed" are obvious 
> but what does it mean from a formal specification perspective to have 
> "vmdk"?  Is that VMDK v3 or v4, what if there's a v5?

It might be better to just use a uint16_t field for the backing format,
where each valid format gets a bit position assigned.  For now just raw,
qed and qcow2 would be enough.