[Libguestfs] Can I specify qcow2 preallocation method with virt-builder?

[Richard W.M. Jones]

On Tue, May 17, 2016 at 05:15:57PM +0300, Yaniv Kaul wrote:
> When creating qcow2 images using virt-builder, is there a way to specify
> the qcow2 preallocation, as possible with qemu-img create -o
> preallocation=metada , for example?

No .. but .. it does default to preallocation=metadata provided that
the output format is qcow2:

https://github.com/libguestfs/libguestfs/blob/master/builder/builder.ml#L582-L585
https://github.com/libguestfs/libguestfs/blob/master/src/create.c#L281-L295

Rich.

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