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diff --git a/common/dynamic_partition_control_interface.h b/common/dynamic_partition_control_interface.h
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+//
+// Copyright (C) 2018 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 UPDATE_ENGINE_COMMON_DYNAMIC_PARTITION_CONTROL_INTERFACE_H_
+#define UPDATE_ENGINE_COMMON_DYNAMIC_PARTITION_CONTROL_INTERFACE_H_
+
+#include <stdint.h>
+
+#include <memory>
+#include <string>
+
+#include "update_engine/update_metadata.pb.h"
+
+namespace chromeos_update_engine {
+
+struct FeatureFlag {
+  enum class Value { NONE = 0, RETROFIT, LAUNCH };
+  constexpr explicit FeatureFlag(Value value) : value_(value) {}
+  constexpr bool IsEnabled() const { return value_ != Value::NONE; }
+  constexpr bool IsRetrofit() const { return value_ == Value::RETROFIT; }
+  constexpr bool IsLaunch() const { return value_ == Value::LAUNCH; }
+
+ private:
+  Value value_;
+};
+
+class DynamicPartitionControlInterface {
+ public:
+  virtual ~DynamicPartitionControlInterface() = default;
+
+  // Return the feature flags of dynamic partitions on this device.
+  // Return RETROFIT iff dynamic partitions is retrofitted on this device,
+  //        LAUNCH iff this device is launched with dynamic partitions,
+  //        NONE iff dynamic partitions is disabled on this device.
+  virtual FeatureFlag GetDynamicPartitionsFeatureFlag() = 0;
+
+  // Return the feature flags of Virtual A/B on this device.
+  virtual FeatureFlag GetVirtualAbFeatureFlag() = 0;
+
+  // Do necessary cleanups before destroying the object.
+  virtual void Cleanup() = 0;
+
+  // Prepare all partitions for an update specified in |manifest|.
+  // This is needed before calling MapPartitionOnDeviceMapper(), otherwise the
+  // device would be mapped in an inconsistent way.
+  // If |update| is set, create snapshots and writes super partition metadata.
+  virtual bool PreparePartitionsForUpdate(uint32_t source_slot,
+                                          uint32_t target_slot,
+                                          const DeltaArchiveManifest& manifest,
+                                          bool update) = 0;
+
+  virtual bool FinishUpdate() = 0;
+};
+
+}  // namespace chromeos_update_engine
+
+#endif  // UPDATE_ENGINE_COMMON_DYNAMIC_PARTITION_CONTROL_INTERFACE_H_