1 // 2 // Copyright (C) 2015 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #ifndef UPDATE_ENGINE_BOOT_CONTROL_RECOVERY_H_ 18 #define UPDATE_ENGINE_BOOT_CONTROL_RECOVERY_H_ 19 20 #include <string> 21 22 #include <hardware/boot_control.h> 23 #include <hardware/hardware.h> 24 25 #include "update_engine/common/boot_control.h" 26 27 namespace chromeos_update_engine { 28 29 // The Android recovery implementation of the BootControlInterface. This 30 // implementation uses the legacy libhardware's boot_control HAL to access the 31 // bootloader by linking against it statically. This should only be used in 32 // recovery. 33 class BootControlRecovery : public BootControlInterface { 34 public: 35 BootControlRecovery() = default; 36 ~BootControlRecovery() = default; 37 38 // Load boot_control HAL implementation using libhardware and 39 // initializes it. Returns false if an error occurred. 40 bool Init(); 41 42 // BootControlInterface overrides. 43 unsigned int GetNumSlots() const override; 44 BootControlInterface::Slot GetCurrentSlot() const override; 45 bool GetPartitionDevice(const std::string& partition_name, 46 BootControlInterface::Slot slot, 47 std::string* device) const override; 48 bool IsSlotBootable(BootControlInterface::Slot slot) const override; 49 bool MarkSlotUnbootable(BootControlInterface::Slot slot) override; 50 bool SetActiveBootSlot(BootControlInterface::Slot slot) override; 51 bool MarkBootSuccessfulAsync(base::Callback<void(bool)> callback) override; 52 53 private: 54 // NOTE: There is no way to release/unload HAL implementations so 55 // this is essentially leaked on object destruction. 56 boot_control_module_t* module_; 57 58 DISALLOW_COPY_AND_ASSIGN(BootControlRecovery); 59 }; 60 61 } // namespace chromeos_update_engine 62 63 #endif // UPDATE_ENGINE_BOOT_CONTROL_RECOVERY_H_ 64
