tree b820fc218ba85f7912764924cee8218e512e16e4
parent 8a57a4be8389073d8bdb5d5d22e50d6282a36df0
author Stefan Hajnoczi <stefanha@redhat.com> 1550486724 +0000
committer Max Reitz <mreitz@redhat.com> 1551103888 +0100

qcow2: include LUKS payload overhead in qemu-img measure

LUKS encryption reserves clusters for its own payload data.  The size of
this area must be included in the qemu-img measure calculation so that
we arrive at the correct minimum required image size.

(Ab)use the qcrypto_block_create() API to determine the payload
overhead.  We discard the payload data that qcrypto thinks will be
written to the image.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190218104525.23674-2-stefanha@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>