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diff --git a/volume_manager/EmulatedVolume.h b/volume_manager/EmulatedVolume.h
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+++ b/volume_manager/EmulatedVolume.h
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+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ * Copyright (C) 2019 The LineageOS Project
+ *
+ * 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.
+ */
+
+#ifndef ANDROID_VOLMGR_EMULATED_VOLUME_H
+#define ANDROID_VOLMGR_EMULATED_VOLUME_H
+
+#include "VolumeBase.h"
+
+#include <cutils/multiuser.h>
+#include <fstab/fstab.h>
+
+using android::fs_mgr::FstabEntry;
+
+namespace android {
+namespace volmgr {
+
+/*
+ * Shared storage emulated on top of private storage.
+ *
+ * Knows how to spawn a FUSE daemon to synthesize permissions.  ObbVolume
+ * can be stacked above it.
+ *
+ * This volume is always multi-user aware, but is only binds itself to
+ * users when its primary storage.  This volume should never be presented
+ * as secondary storage, since we're strongly encouraging developers to
+ * store data local to their app.
+ */
+class EmulatedVolume : public VolumeBase {
+  public:
+    explicit EmulatedVolume(FstabEntry* rec, const std::string& subdir);
+    virtual ~EmulatedVolume();
+
+  protected:
+    status_t doMount() override;
+    status_t doUnmount(bool detach = false) override;
+
+  private:
+    std::string mSubdir;
+    std::string mDevPath;
+    std::string mFsType;
+    unsigned long mFlags;
+    std::string mFsOptions;
+
+    DISALLOW_COPY_AND_ASSIGN(EmulatedVolume);
+};
+
+}  // namespace volmgr
+}  // namespace android
+
+#endif