Merge pull request #5845 from alexandref75/fix-dir-device-support

Fix dir support for devices

oci/spec_opts_linux.go

@@ -46,13 +46,13 @@ func WithDevices(devicePath, containerPath, permissions string) SpecOpts {
 		if err != nil {
 			return err
 		}
-		for _, dev := range devs {
-			s.Linux.Devices = append(s.Linux.Devices, dev)
+		for i := range devs {
+			s.Linux.Devices = append(s.Linux.Devices, devs[i])
 			s.Linux.Resources.Devices = append(s.Linux.Resources.Devices, specs.LinuxDeviceCgroup{
 				Allow:  true,
-				Type:   dev.Type,
-				Major:  &dev.Major,
-				Minor:  &dev.Minor,
+				Type:   devs[i].Type,
+				Major:  &devs[i].Major,
+				Minor:  &devs[i].Minor,
 				Access: permissions,
 			})
 		}

oci/spec_opts_linux_test.go

@@ -160,6 +160,37 @@ func TestGetDevices(t *testing.T) {
 			}
 		})
 	})
+	t.Run("two devices", func(t *testing.T) {
+		nullDev := filepath.Join(dir, "null")
+		if err := ioutil.WriteFile(nullDev, nil, 0600); err != nil {
+			t.Fatal(err)
+		}
+
+		if err := unix.Mount("/dev/null", nullDev, "", unix.MS_BIND, ""); err != nil {
+			t.Fatal(err)
+		}
+		defer unix.Unmount(filepath.Join(dir, "null"), unix.MNT_DETACH)
+		devices, err := getDevices(dir, "")
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if len(devices) != 2 {
+			t.Fatalf("expected two devices %v", devices)
+		}
+		if devices[0].Path == devices[1].Path {
+			t.Fatalf("got same path for the two devices %s", devices[0].Path)
+		}
+		if devices[0].Path != zero && devices[0].Path != nullDev {
+			t.Fatalf("got unexpected device path %s", devices[0].Path)
+		}
+		if devices[1].Path != zero && devices[1].Path != nullDev {
+			t.Fatalf("got unexpected device path %s", devices[1].Path)
+		}
+		if devices[0].Major == devices[1].Major && devices[0].Minor == devices[1].Minor {
+			t.Fatalf("got sema mojor and minor on two devices %s %s", devices[0].Path, devices[1].Path)
+		}
+	})
 	t.Run("With symlink in dir", func(t *testing.T) {
 		if err := os.Symlink("/dev/zero", filepath.Join(dir, "zerosym")); err != nil {
 			t.Fatal(err)