Add a test for inheriting the correct namespace

Signed-off-by: luke <luke.parkin@arm.com>

Author: Luke-Parkin

e2e/runtime_test.go

@@ -128,6 +128,42 @@ func TestRuntimeWriteProcessPid(t *testing.T) {
 	assertFileContent(t, pidFilePath, fmt.Sprintf("%d", pid))
 }
 
+func TestRuntimeProxyInheritsCorrectNamespace(t *testing.T) {
+	rootDir := t.TempDir()
+	remoteprocName := "a-lovely-blue-device"
+	sim := remoteproc.NewSimulator(rootDir).WithName(remoteprocName)
+	if err := sim.Start(); err != nil {
+		t.Fatalf("failed to run simulator: %s", err)
+	}
+	defer func() { _ = sim.Stop() }()
+
+	bin, err := repo.BuildRuntimeBin(t.TempDir(), rootDir, nil)
+	require.NoError(t, err)
+
+	const containerName = "blue-container"
+	bundlePath := t.TempDir()
+
+	spec := &specs.Spec{}
+	require.NoError(t, generateBundle(
+		bundlePath,
+		remoteprocName,
+		addLinuxNamespaces(spec, specs.LinuxNamespace{Type: specs.MountNamespace}),
+	))
+
+	_, err = invokeRuntime(bin, "create", "--bundle", bundlePath, containerName)
+	require.NoError(t, err)
+
+	hostMountNS, err := os.Readlink("/proc/self/ns/mnt")
+	require.NoError(t, err)
+	proxyMountNS, err := os.Readlink(fmt.Sprintf("/proc/%d/ns/mnt", pid))
+	require.NoError(t, err)
+
+	assert.NotEqual(t, hostMountNS, proxyMountNS)
+
+	_, err = invokeRuntime(bin, "delete", containerName)
+	require.NoError(t, err)
+}
+
 func assertContainerStatus(t testing.TB, bin repo.RuntimeBin, containerName string, wantStatus specs.ContainerState) {
 	t.Helper()
 	state, err := getContainerState(bin, containerName)
@@ -156,7 +192,14 @@ func getContainerState(bin repo.RuntimeBin, containerName string) (specs.State,
 	return state, nil
 }
 
-func generateBundle(targetDir string, remoteprocName string) error {
+func addLinuxNamespaces(spec *specs.Spec, namespaces ...specs.LinuxNamespace) {
+	if spec.Linux == nil {
+		spec.Linux = &specs.Linux{}
+	}
+	spec.Linux.Namespaces = append(spec.Linux.Namespaces, namespaces...)
+}
+
+func generateBundle(targetDir string, remoteprocName string, namespaces ...specs.LinuxNamespace) error {
 	const bundleRoot = "rootfs"
 	const firmwareName = "hello_world.elf"
 
@@ -179,6 +222,7 @@ func generateBundle(targetDir string, remoteprocName string) error {
 		Annotations: map[string]string{
 			"remoteproc.name": remoteprocName,
 		},
+		Linux: &specs.Linux{Namespaces: namespaces,}
 	}
 
 	specPath := filepath.Join(targetDir, "config.json")