Use tombstones correctly for directories that exist in r/o branches.

unionfs/unionfs.go

@@ -264,19 +264,20 @@ func (me *UnionFs) Rmdir(path string) (code fuse.Status) {
 	if !r.attr.IsDirectory() {
 		return syscall.ENOTDIR
 	}
-	if r.branch > 0 {
-		stream, code := me.fileSystems[r.branch].OpenDir(path)
-		if code.Ok() {
-			_, ok := <-stream
-			if ok {
-				// TODO - should consume stream.
-				return syscall.ENOTEMPTY
-			}
+
+	stream, code := me.OpenDir(path)
+	found := false
+	for _ = range stream {
+		found = true
 	}
-		me.putDeletion(path)
-		return fuse.OK
+	if found {
+		return syscall.ENOTEMPTY
 	}
 
+	if r.branch > 0 {
+		code = me.putDeletion(path)
+		return code
+	}
 	code = me.fileSystems[0].Rmdir(path)
 	if code != fuse.OK {
 		return code

unionfs/unionfs_test.go

@@ -449,3 +449,23 @@ func TestTruncateTimestamp(t *testing.T) {
 		t.Error("timestamp drift", truncTs, fi.Mtime_ns)
 	}
 }
+
+func TestRemoveAll(t *testing.T) {
+	t.Log("TestRemoveAll")
+	wd, clean := setupUfs(t)
+	defer clean()
+
+	err := os.Mkdir(wd + "/ro/dir", 0755)
+	CheckSuccess(err)
+	
+	contents := "hello"
+	fn := wd + "/ro/dir/y"
+	err = ioutil.WriteFile(fn, []byte(contents), 0644)
+	CheckSuccess(err)
+
+	err = os.RemoveAll(wd+"/mount/dir")
+	if err != nil {
+		t.Error("Should delete all")
+	}
+}
+