On Thu, Jul 04, 2019 at 03:52:20PM +0100, Richard W.M. Jones wrote: I've now tested this patch. Here's how. (Note step (2) is the test). Steven: You will need to include this information in your bug report so that the QE team have a way to reproduce the problem. (1) VIRTIO_WIN=~/d/libguestfs/test-data/fake-virtio-win/fake-virtio-win.iso \ ./run virt-v2v -vx -i disk test-data/phony-guests/windows.img -o null |& tee /tmp/log Observe in /tmp/log that there is the following line: windows: copy_from_virtio_win: guest tools source ISO /home/rjones/d/libguestfs/test-data/fake-virtio-win/fake-virtio-win.iso This is expected because we're using a regular file. (2) Loopback mount the ISO: $ sudo losetup /dev/loop0 `pwd`/fake-virtio-win.iso $ ll /dev/loop0 brw-rw----. 1 root disk 7, 0 Jul 4 16:01 /dev/loop0 $ sudo blockdev --getsize64 /dev/loop0 2738176 Now run the same command as above but pointing to /dev/loop0, and of course virt-v2v will now need to be run as root: sudo VIRTIO_WIN=/dev/loop0 \ ../run virt-v2v -vx -i disk test-data/phony-guests/windows.img -o null |& tee /tmp/log To show that it used the block device: $ grep copy_from_virtio_win /tmp/log windows: copy_from_virtio_win: guest tools source ISO /dev/loop0 To clean up: $ sudo losetup -d /dev/loop0 Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v