Comment 2 for bug 2020813

Reviewed: https://review.opendev.org/c/openstack/nova/+/884439
Committed: https://opendev.org/openstack/nova/commit/cef3b5ef2cc1fe983578e4966208cf95fdea5880
Submitter: "Zuul (22348)"
Branch: master

commit cef3b5ef2cc1fe983578e4966208cf95fdea5880
Author: Alexey Stupnikov <email address hidden>
Date: Thu May 25 21:23:32 2023 +0200

    Translate VF network capabilities to port binding

    Libvirt's node device driver accumulates and reports information
    about host devices. Network capabilities reported by node device
    driver for NIC contain information about HW offloads supported
    by this NIC.

    One of possible features reported by node device driver is
    switchdev: a NIC capability to implement VFs similar to actual
    HW switch ports (also referred to as SR-IOV OVS hardware offload).
    From Neutron perspective, vnic-type should be set to "direct" and
    "switchdev" capability should be added to port binding profile to
    enable HW offload (there are also configuration steps on compute
    hosts to tune NIC config).

    This patch was written to automatically translate "switchdev" from
    VF network capabilities reported by node device driver to Neutron
    port binding profile and allow user to skip manual step that
    requires admin privileges.

    Other capabilities are also translated: they are not used right
    now, but provide visibility and can be utilized later.

    Closes-bug: #2020813
    Closes-bug: #2008238
    Change-Id: I3b17f386325b8f42c0c374f766fb21c520161a59