diff --git a/EmulatedVolume.h b/EmulatedVolume.h
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+++ b/EmulatedVolume.h
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+/*
+ * Copyright (C) 2015 The Android Open Source 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_VOLD_EMULATED_VOLUME_H
+#define ANDROID_VOLD_EMULATED_VOLUME_H
+
+#include "VolumeBase.h"
+
+#include <cutils/multiuser.h>
+
+namespace android {
+namespace vold {
+
+/*
+ * 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:
+    EmulatedVolume(const std::string& rawPath, const std::string& nickname);
+    virtual ~EmulatedVolume();
+
+    void setPrimary(bool primary);
+    bool getPrimary() { return mPrimary; }
+
+    status_t bindUser(userid_t user);
+    status_t unbindUser(userid_t user);
+
+private:
+    /* Mount point of raw storage */
+    std::string mRawPath;
+    /* Mount point of FUSE wrapper */
+    std::string mFusePath;
+    /* PID of FUSE wrapper */
+    pid_t mFusePid;
+    /* Flag indicating this is primary storage */
+    bool mPrimary;
+
+protected:
+    status_t doMount();
+    status_t doUnmount();
+    status_t doFormat();
+
+    status_t bindUserInternal(userid_t user, bool bind);
+
+    DISALLOW_COPY_AND_ASSIGN(EmulatedVolume);
+};
+
+}  // namespace vold
+}  // namespace android
+
+#endif