Comment 7 for bug 1893263

Reviewed: https://review.opendev.org/752245
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=a69845f3732843ee1451b2e4ebf547d9801e898d
Submitter: Zuul
Branch: stable/ussuri

commit a69845f3732843ee1451b2e4ebf547d9801e898d
Author: Rodrigo Barbieri <email address hidden>
Date: Thu Aug 27 17:20:19 2020 -0300

    Allow tap interface with multiqueue

    When vif_type="tap" (such as when using calico),
    attempting to create an instance using an image that has
    the property hw_vif_multiqueue_enabled=True fails, because
    the interface is always being created without multiqueue
    flags.

    This change checks if the property is defined and passes
    the multiqueue parameter to create the tap interface
    accordingly.

    In case the multiqueue parameter is passed but the
    vif_model is not virtio (or unspecified), the old
    behavior is maintained.

    Conflicts:
        nova/virt/libvirt/vif.py

    NOTE: The conflict is due to not having patch
    Iefa6009874395cafe3121e44a48d882c38230d16 in stable/ussuri.

    Change-Id: I0307c43dcd0cace1620d2ac75925651d4ee2e96c
    Closes-bug: #1893263
    (cherry picked from commit 84cfc8e9ab1396ec17abcfc9646c7d40f1d966ae)