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[zhanghao <1899431@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

How to reproduce this problem：
1.Create a DPDK VM with a network(instance has a vhu01 vif)
2.VM attaches an interface(instance has a vhu02 vif)

virsh domifstat instance-XXX vhu01(success)

virsh domifstat instance-XXX vhu02(failure)
error: Failed to get interface stats instance-XXX vhu02
error: invalid argument: invalid path, 'vhu02' is not a known interface

When a DPDK VM attaches an interface, libvirt can not automatically
generate "<target dev='vhuXXX'/>" in XML file.

** Affects: nova
     Importance: Undecided
     Assignee: zhanghao (zhanghao2)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1899431

Title:
  virsh domifstat can not get vhostuser vif statistics

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  How to reproduce this problem：
  1.Create a DPDK VM with a network(instance has a vhu01 vif)
  2.VM attaches an interface(instance has a vhu02 vif)

  virsh domifstat instance-XXX vhu01(success)

  virsh domifstat instance-XXX vhu02(failure)
  error: Failed to get interface stats instance-XXX vhu02
  error: invalid argument: invalid path, 'vhu02' is not a known interface

  When a DPDK VM attaches an interface, libvirt can not automatically
  generate "<target dev='vhuXXX'/>" in XML file.

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