[Libguestfs] luks filter breaks zeroing

(More of a note to self to investigate) $ qemu-img create -f luks --object secret,data=LETMEPASS,id=sec0 -o key-secret=sec0 encrypted.img 100M Formatting 'encrypted.img', fmt=luks size=104857600 key-secret=sec0 $ rm -f data.img $ truncate -s 100M data.img $ nbdkit file encrypted.img --filter=luks passphrase=LETMEPASS --run 'nbdcopy data.img $nbd' nbdkit: backend.c:718: backend_zero: Assertion `c->can_zero > NBDKIT_ZERO_NONE' failed. write at offset 0 failed: Transport endpoint is not connected nbdkit: nbdkit command was killed by signal 6 -- 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