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[Hamdy Khader <1829734@xxxxxxxxxxxxxxxxxx>]

** No longer affects: nova

** No longer affects: os-vif

** Tags added: neutron

** Tags added: os-vif

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https://bugs.launchpad.net/bugs/1829734

Title:
  [RFE] OVS DPDK port representors support

Status in neutron:
  In Progress

Bug description:
  DPDK representors enable configuring a phy port to a guest (VM)
  machine.

  OVS resides in the hypervisor which has one or more physical
  interfaces also known as the physical functions (PFs). If a PF
  supports SR-IOV it can be used to enable communication with the VMs
  via Virtual Functions (VFs). The VFs are virtual PCIe devices created
  from the physical Ethernet controller.

  DPDK models a physical interface as a rte device on top of which an
  eth device is created. DPDK (version 18.xx) introduced the
  representors eth devices. A representor device represents the VF eth
  device (VM side) on the hypervisor side and operates on top of a PF.
  Representors are multi devices created on top of one PF.

  The goal is to enable having dpdk port attached to instance as a
  direct port when the hypervisor datapath type is netdev.

  
  Changes needed:

  * Neutron:
  return OVS VIF type in case of a direct port and a netdev databath.

  * Nova:
  In case of a port's OVS VIF type and a direct VNIC type, the datapath info must be set in the VIF profile as the VIF object is instantiated from VIFHostDevice class with profile of type VIFPortProfileOVSRepresentor.

  * os-vif: 
  Do the plugging using the DPDK Representors syntax[1] in case of VIFHostDevice and a netdev databath.


  [1] http://docs.openvswitch.org/en/latest/topics/dpdk/phy/

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