[Bug 1892132] Re: Failure to get the correct UpLink Representor

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~fnordahl/ubuntu/+source/libvirt/+git/libvirt/+merge/405820

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https://bugs.launchpad.net/bugs/1892132

Title:
  Failure to get the correct UpLink Representor

Status in os-vif:
  Fix Released
Status in os-vif victoria series:
  Fix Committed
Status in libvirt package in Ubuntu:
  Fix Released
Status in python-os-vif package in Ubuntu:
  Fix Released
Status in libvirt source package in Focal:
  New
Status in python-os-vif source package in Focal:
  In Progress
Status in libvirt source package in Groovy:
  New
Status in python-os-vif source package in Groovy:
  In Progress
Status in libvirt source package in Hirsute:
  New
Status in python-os-vif source package in Hirsute:
  Fix Released
Status in libvirt source package in Impish:
  Fix Released
Status in python-os-vif source package in Impish:
  Fix Released

Bug description:
  Due to new kernel patch here [1], the PF and VF representors are
  linked to their parent PCI device.

  Old Structure:
  The structure of VF's PCI Address/physfn/net contains only the PF of that VF

  $ ls /sys/bus/pci/devices/<vf-pci-addre>/physfn/net/
  enp2s0f0

  $ ls -l /sys/class/net
  ...
  lrwxrwxrwx 1 root root 0 Aug 17 11:11 enp2s0f0_0 -> ../../devices/virtual/net/enp2s0f0_0
  lrwxrwxrwx 1 root root 0 Aug 17 11:11 enp2s0f0_1 -> ../../devices/virtual/net/enp2s0f0_1
  lrwxrwxrwx 1 root root 0 Aug 17 11:11 enp2s0f0_2 -> ../../devices/virtual/net/enp2s0f0_2
  lrwxrwxrwx 1 root root 0 Aug 17 11:11 enp2s0f0_3 -> ../../devices/virtual/net/enp2s0f0_3
  ...

  New Structure:
  The structure of VF's PCI Address/physfn/net contains the PF of that VF and the VF representors

  $ ls /sys/bus/pci/devices/<vf-pci-addre>/physfn/net/
  enp3s0f0  enp3s0f0_0  enp3s0f0_1  enp3s0f0_2  enp3s0f0_3

  $ ls -l /sys/class/net
  ...
  lrwxrwxrwx. 1 root root    0 Aug 17 08:43 enp3s0f0_0 -> ../../devices/pci0000:00/0000:00:02.0/0000:03:00.0/net/enp3s0f0_0
  lrwxrwxrwx. 1 root root    0 Aug 17 08:43 enp3s0f0_1 -> ../../devices/pci0000:00/0000:00:02.0/0000:03:00.0/net/enp3s0f0_1
  lrwxrwxrwx. 1 root root    0 Aug 17 08:43 enp3s0f0_2 -> ../../devices/pci0000:00/0000:00:02.0/0000:03:00.0/net/enp3s0f0_2
  lrwxrwxrwx. 1 root root    0 Aug 17 08:43 enp3s0f0_3 -> ../../devices/pci0000:00/0000:00:02.0/0000:03:00.0/net/enp3s0f0_3
  ...

  [1]
  https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=123f0f53dd64b67e34142485fe866a8a581f12f1

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