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

["Richard W.M. Jones" <rjones@redhat.com>]

On Wed, Nov 15, 2017 at 04:52:56PM +0100, Gandalf Corvotempesta wrote:
> I'm thinking if support for XVA files could be added to qemu-img
> The file-format is well known (it's just a tar archive) and there are scripts
> that are able to convert an XVA file to a RAW image. (ie:
> https://gist.github.com/miebach/0433947bcf053de23159)
> 
> Running these script on their own is very time consuming, as you have to
> extract the XVA, convert any disk image from "single chunks" to a raw image
> and then use qemu-img to convert from raw to qcow.
> 
> Maybe a native support will be able to skip some steps. (like the
> conversion from
> "single chunks" to raw and raw to qcow2)

Why not use the offset/size support in the raw driver?

We use that to access files inside OVA files (also a tar file with a
funny extension) in virt-v2v:

https://github.com/libguestfs/libguestfs/blob/994ca8d87361a4eb52a05bb4496b074fc9cb705a/v2v/input_ova.ml#L300

Rich.

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