var podUID string = string(pod.ObjectMeta.UID)
	ipProto := uint8(unix.IPPROTO_TCP)

	fakeIPSetDeps.On("addIP",
		"foo-v4",
		netip.MustParseAddr("99.9.9.9"),
		ipProto,
		podUID,
		false,
	).Return(nil)

	fakeIPSetDeps.On("addIP",
		"foo-v4",
		netip.MustParseAddr("2.2.2.2"),
		ipProto,
		podUID,
		false,
	).Return(nil)

		},
	} {
		t.Run(tt.name, func(t *testing.T) {
			podUID, containerID, err := getPodUIDAndContainerIDFromCGroups(makeCGroups(tt.cgroupPaths))

			if tt.expectMsg != "" {
				assert.Equal(t, tt.expectMsg, err.Error())
				return
			}
			assert.Equal(t, tt.expectPodUID, podUID)
			assert.Equal(t, tt.expectContainerID, containerID)
		})
	}

	// - the CmdAdd comes back thru here with a new IP
	// - we will never clean up that old IP that we "lost"
	// To fix this we probably need to impl CmdDel + manage our own podUID/IP mapping.
	if retErr == nil {
		// Handle node healthcheck probe rewrites
		_, err = s.addPodToHostNSIpset(pod, podIPs)
		if err != nil {

		return nil
	}
	return err
}

// Get any IPs currently assigned to the Pod.
//
// If 'PodIPs' exists, it is preferred (and should be guaranteed to contain the address in 'PodIP'),
// otherwise fallback to 'PodIP'.
//
// Note that very early in the pod's lifecycle (before all the node CNI plugin invocations finish)
// K8S may not have received the pod IPs yet, and may not report the pod as having any.

- Optimize code, filter podUID is empty string when call this `getPodAndContainerForDevice` method. ([#126997](https://github.com/kubernetes/kubernetes/pull/126997), [@lengrongfu](https://github.com/lengrongfu)) [SIG Node]

	var podStatus corev1.PodStatus
	if v6IP {
		podStatus = corev1.PodStatus{
			PodIP:  "e9ac:1e77:90ca:399f:4d6d:ece2:2f9b:3164",
			PodIPs: []corev1.PodIP{{IP: "e9ac:1e77:90ca:399f:4d6d:ece2:2f9b:3164"}, {IP: "e9ac:1e77:90ca:399f:4d6d:ece2:2f9b:3165"}},
		}
	} else {
		podStatus = corev1.PodStatus{
			PodIP:  "2.2.2.2",
			PodIPs: []corev1.PodIP{{IP: "2.2.2.2"}, {IP: "3.3.3.3"}},
		}
	}

	return &corev1.Pod{

		ObjectMeta: metav1.ObjectMeta{
			Name:      "test",
			Namespace: "test",
		},
		Spec: corev1.PodSpec{
			NodeName: NodeName,
		},
		Status: corev1.PodStatus{
			PodIPs: []corev1.PodIP{},
			PodIP:  "",
		},
	}
	ns := &corev1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "test"}}

	client := kube.NewFakeClient(ns, pod)

	fs := &fakeServer{}

	server := getFakeDP(fs, client.Kube())

			Namespace: "test",
		},
		Spec: corev1.PodSpec{
			NodeName: "derp",
		},
		Status: corev1.PodStatus{
			PodIP:  "2.2.2.2",
			PodIPs: []corev1.PodIP{{IP: "2.2.2.2"}, {IP: "3.3.3.3"}},
		},
	}

	podIPs := GetPodIPsIfPresent(pod)
	assert.Equal(t, len(podIPs), 2)
}

func TestGetPodIPsIfNoPodIPPresent(t *testing.T) {
	pod := &corev1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "test",

	pod := &corev1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "pod-bingo",
			Namespace: "funkyns",
		},
		Spec: corev1.PodSpec{
			NodeName: NodeName,
		},
		Status: corev1.PodStatus{
			PodIP: fakePodIP,
		},
	}
	ns := &corev1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "funkyns"}}

	client := kube.NewFakeClient(ns, pod)

	// We are expecting at most 1 calls to the mock, wait for them

//
// Instead, we traverse the procfs. Comments on this method are inline.
func getPodNetNs(pod *corev1.Pod) (string, error) {
	parsedPodAddr := net.ParseIP(pod.Status.PodIP)
	if parsedPodAddr == nil {
		return "", fmt.Errorf("failed to parse addr: %s", pod.Status.PodIP)
	}

	fs, err := procfs.NewFS("/host/proc")
	if err != nil {
		return "", fmt.Errorf("read procfs: %v", err)
	}
	procs, err := fs.AllProcs()
	if err != nil {