Bug 1962634

Description of problem:
Fail to get interface name for ... GetNetName(): no net directory under pci device  during upgrade from OCP 4.5.16 to 4.6.17

The purpose of this BZ is to identify whether this is a known issue or one that warrants attention, and to track it through to resolution.

~~~
$ oc logs -n openshift-sriov-network-operator sriov-network-config-daemon-plkp6
W0511 17:52:18.398178   33692 utils.go:275] setNetdevMTU(): fail to get interface name for 0000:12:0a.0: GetNetName(): no net directory under pci device 0000:12:0a.0: "lstat /sys/bus/pci/devices/0000:12:0a.0/net: no such file or directory"
W0511 17:52:19.398672   33692 utils.go:275] setNetdevMTU(): fail to get interface name for 0000:12:0a.0: GetNetName(): no net directory under pci device 0000:12:0a.0: "lstat /sys/bus/pci/devices/0000:12:0a.0/net: no such file or directory"
W0511 17:52:20.398961   33692 utils.go:275] setNetdevMTU(): fail to get interface name for 0000:12:0a.0: GetNetName(): no net directory under pci device 0000:12:0a.0: "lstat /sys/bus/pci/devices/0000:12:0a.0/net: no such file or directory"
W0511 17:52:21.399302   33692 utils.go:275] setNetdevMTU(): fail to get interface name for 0000:12:0a.0: GetNetName(): no net directory under pci device 0000:12:0a.0: "lstat /sys/bus/pci/devices/0000:12:0a.0/net: no such file or directory"
W0511 17:52:22.399551   33692 utils.go:275] setNetdevMTU(): fail to get interface name for 0000:12:0a.0: GetNetName(): no net directory under pci device 0000:12:0a.0: "lstat /sys/bus/pci/devices/0000:12:0a.0/net: no such file or directory"
W0511 17:52:23.399774   33692 utils.go:275] setNetdevMTU(): fail to get interface name for 0000:12:0a.0: GetNetName(): no net directory under pci device 0000:12:0a.0: "lstat /sys/bus/pci/devices/0000:12:0a.0/net: no such file or directory"
W0511 17:52:24.989896   33692 utils.go:275] setNetdevMTU(): fail to get interface name for 0000:12:0f.3: GetNetName(): no net directory under pci device 0000:12:0f.3: "lstat /sys/bus/pci/devices/0000:12:0f.3/net: no such file or directory"
~~~

The above error messages appeared after the node was rebooted, and the `virt-launcher` pods on that node were found not to be running.

This issue was resolved by unbinding and re-binding the SRIOV VFs on that node, and then deleting its sriov-network-config-daemon pod:

unbind and re-bind the node's SRIOV VFs:
~~~
ssh core@node-06
sudo -i
cd /sys/bus/pci/devices/
for x in $(ls -1 | grep 0000\:12\:0\*); do echo $x > /sys/bus/pci/drivers/iavf/unbind; done
for x in $(ls -1 | grep 0000\:12\:0\*); do echo $x > /sys/bus/pci/drivers/iavf/bind; done
~~~

delete the node's sriov-network-config-daemon pod:
~~~
oc delete pod -n openshift-sriov-network-operator sriov-network-config-daemon-plkp6
~~~


Version-Release number of selected component (if applicable):
ocp 4.5.16 -> 4.6.17

How reproducible:


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