Update DiscoverSriovDevices to list only pfs with networking devices

Currently DiscoverSriovDevices creates a list of interfaces,
by scanning /sys/devices/pci.
Some of them might not have a networking devices.
The interfaces without networking devices won't be available,
but would still be reset, as they won't be part of the node policy.

Updating DiscoverSriovDevices to list only networking devices,
will support namespace isolation,
as /sys/class/net entries are network-namespaced.

Fixes: #2

Signed-off-by: Or Shoval <[email protected]>

pkg/utils/utils.go

@@ -78,6 +78,18 @@ func DiscoverSriovDevices() ([]sriovnetworkv1.InterfaceExt, error) {
 			glog.Warningf("DiscoverSriovDevices(): unable to parse device driver for device %+v %q", device, err)
 			continue
 		}
+
+		deviceNames, err := dputils.GetNetNames(device.Address)
+		if err != nil {
+			glog.Warningf("DiscoverSriovDevices(): unable to get device names for device %+v %q", device, err)
+			continue
+		}
+
+		if len(deviceNames) == 0 {
+			// no network devices found, skipping device
+			continue
+		}
+
 		iface := sriovnetworkv1.InterfaceExt{
 			PciAddress: device.Address,
 			Driver:     driver,