}
	return p.UpsertPodCacheWithNetns(string(pod.UID), wl), nil
}

// Update the cache with the given Netns. If there is already a Netns for the given uid, we return it, and close the one provided.
func (p *podNetnsCache) UpsertPodCacheWithNetns(uid string, workload WorkloadInfo) Netns {
	// lock current snapshot pod map
	p.mu.Lock()
	defer p.mu.Unlock()
	if existing := p.currentPodCache[uid]; existing.Netns != nil {

	n := NewPodNetnsProcFinder(fakeFs())
	pod := &corev1.Pod{ObjectMeta: metav1.ObjectMeta{
		Name:      "foo",
		Namespace: "bar",
		UID:       types.UID("863b91d4-4b68-4efa-917f-4b560e3e86aa"),
	}}
	podUIDNetns, err := n.FindNetnsForPods(map[types.UID]*corev1.Pod{
		pod.UID: pod,
	})
	if err != nil {
		panic(err)
	}
	defer podUIDNetns.Close()

	if len(podUIDNetns) == 0 {
		t.Fatal("expected to find pod netns")

	"istio.io/istio/pkg/test/util/assert"
)

func TestMeshDataplaneAddsAnnotationOnAdd(t *testing.T) {
	pod := &corev1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "test",
			Namespace: "test",
			UID:       types.UID("test"),
		},
	}

	fakeCtx := context.Background()
	fakeClientSet := fake.NewSimpleClientset(pod)

	podIP := netip.MustParseAddr("99.9.9.1")
	podIPs := []netip.Addr{podIP}

	server := &fakeServer{}

	sysStat = statUnix
}

// userMap and groupMap caches UID and GID lookups for performance reasons.
// The downside is that renaming uname or gname by the OS never takes effect.
var userMap, groupMap sync.Map // map[int]string

func statUnix(fi fs.FileInfo, h *Header, doNameLookups bool) error {
	sys, ok := fi.Sys().(*syscall.Stat_t)
	if !ok {
		return nil
	}
	h.Uid = int(sys.Uid)
	h.Gid = int(sys.Gid)
	if doNameLookups {

// (see https://docs.google.com/document/d/1F__vEKeI41P7PPUCMM9PVPYY34pyrvQI5rbTJVnS5c4)
func clusterUID(client kubernetes.Interface) (types.UID, error) {
	kubeSystem, err := client.CoreV1().Namespaces().Get(context.TODO(), "kube-system", metav1.GetOptions{})
	if err != nil {
		return "", err
	}
	return kubeSystem.UID, nil

	if d := atomic.LoadInt64(&l.responseDelay); d != 0 {
		time.Sleep(time.Duration(d))
	}

	l.mutex.Lock()
	defer l.mutex.Unlock()
	if len(args.UID) != 0 {
		return false, fmt.Errorf("ForceUnlock called with non-empty UID: %s", args.UID)
	}
	delete(l.lockMap, args.Resources[0]) // Remove the lock (irrespective of write or read lock)
	reply = true
	return reply, nil

package dsync

//go:generate msgp -file $GOFILE

// LockArgs is minimal required values for any dsync compatible lock operation.
type LockArgs struct {
	// Unique ID of lock/unlock request.
	UID string

	// Resources contains single or multiple entries to be locked/unlocked.
	Resources []string

	// Source contains the line number, function and file name of the code
	// on the client node that requested the lock.

	commonInitialisms         = []string{"API", "ASCII", "CPU", "CSS", "DNS", "EOF", "GUID", "HTML", "HTTP", "HTTPS", "ID", "IP", "JSON", "LHS", "QPS", "RAM", "RHS", "RPC", "SLA", "SMTP", "SSH", "TLS", "TTL", "UID", "UI", "UUID", "URI", "URL", "UTF8", "VM", "XML", "XSRF", "XSS"}
	commonInitialismsReplacer *strings.Replacer
)

func init() {
	commonInitialismsForReplacer := make([]string, 0, len(commonInitialisms))

type fakeZtunnel struct {
	deletedPods atomic.Int32
	addedPods   atomic.Int32
	addError    error
}

func (f *fakeZtunnel) Run(ctx context.Context) {
}

func (f *fakeZtunnel) PodDeleted(ctx context.Context, uid string) error {
	f.deletedPods.Add(1)
	return nil
}

func (f *fakeZtunnel) PodAdded(ctx context.Context, pod *corev1.Pod, netns Netns) error {
	f.addedPods.Add(1)
	return f.addError
}

		ObjectMeta: metav1.ObjectMeta{
			Name: fmt.Sprintf("name-%d", id),
			UID:  types.UID(fmt.Sprintf("uid-%d", id)),
		},
		Spec:   v1.PodSpec{},
		Status: v1.PodStatus{},
	}
	return pod, newFakeNs(devNull.Fd())
}

func connect(ctx context.Context) struct {
	ztunClient *net.UnixConn
	ztunServer *ztunnelServer
	uid        string
} {
	pods := &fakePodCache{}

	pod, ns := podAndNetns()