ext4: disklayout: SuperBlock interface implementations.

PiperOrigin-RevId: 255687771

1 files changed, 30 insertions, 0 deletions

diff --git a/pkg/sentry/fs/ext4/disklayout/test_utils.go b/pkg/sentry/fs/ext4/disklayout/test_utils.go
new file mode 100644
index 000000000..9c63f04c0
--- /dev/null
+++ b/pkg/sentry/fs/ext4/disklayout/test_utils.go
@@ -0,0 +1,30 @@
+// Copyright 2019 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package disklayout
+
+import (
+	"reflect"
+	"testing"
+
+	"gvisor.dev/gvisor/pkg/binary"
+)
+
+func assertSize(t *testing.T, v interface{}, want uintptr) {
+	t.Helper()
+
+	if got := binary.Size(v); got != want {
+		t.Errorf("struct %s should be exactly %d bytes but is %d bytes", reflect.TypeOf(v).Name(), want, got)
+	}
+}