Add clarifying comments and remove excessive logging

Author: cemakd

pkg/linkcache/devices_linux.go

@@ -51,7 +51,8 @@ func newDeviceCacheForNode(period time.Duration, node *v1.Node, driverName strin
 	}
 
 	// Look at the status.volumesInUse field.  For each, take the last section
-	// of the string (after the last "/") and call AddVolume for that
+	// of the string (after the last "/") and call AddVolume for that.
+	// The expected format of the volume name is "kubernetes.io/csi/pd.csi.storage.gke.io^<volume-id>"
 	for _, volume := range node.Status.VolumesInUse {
 		volumeName := string(volume)
 		tokens := strings.Split(volumeName, "^")
@@ -63,7 +64,6 @@ func newDeviceCacheForNode(period time.Duration, node *v1.Node, driverName strin
 		// The first token is of the form "kubernetes.io/csi/<driver-name>" or just "<driver-name>".
 		// We should check if it contains the driver name we are interested in.
 		if !strings.Contains(tokens[0], driverName) {
-			klog.V(5).Infof("Skipping volume %q because it is not a %s volume.", volumeName, driverName)
 			continue
 		}
 		klog.Infof("Adding volume %s to cache", string(volume))