Comment 12 for bug 1770640

Reviewed: https://review.openstack.org/568382
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=34f4167974868f817ece4a09ab663ce4a87d3647
Submitter: Zuul
Branch: stable/ocata

commit 34f4167974868f817ece4a09ab663ce4a87d3647
Author: Lee Yarwood <email address hidden>
Date: Fri May 11 15:04:48 2018 +0100

    libvirt: Report the virtual size of RAW disks

    If642e51a4e186833349a8e30b04224a3687f5594 started to correctly report
    the actual size of preallocated file based disks but missed that this
    value was later used as the virtual disk size for RAW disks.

    This is an issue as nova.virt.libvirt.utils.create_image creates these
    disks as sparse files with a reported actual size much smaller than the
    virtual size. During block based LM this then results in disks
    on the destination being created with a much smaller virtual size than
    the disk should have leading to errors during the transfer.

    Conflicts:
          nova/virt/libvirt/driver.py

    NOTE(mriedem): The conflict is due to not having change
    I9616a602ee0605f7f1dc1f47b6416f01895e025b in Ocata.

    Closes-Bug: #1770640
    Change-Id: I464bc2b88123a012cd12213beac4b572c3c20a56
    (cherry picked from commit 016986f4706e881fed16c85c8790af4d26a7c351)
    (cherry picked from commit 2dc9795a0df40c51ef3c79f99e57725db99019c0)
    (cherry picked from commit 938c0a745325fa73d098c6d5ddd20b2a599f9624)