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_ANDROID_H_ 18 #define UPDATE_ENGINE_BOOT_CONTROL_ANDROID_H_ 19 20 #include <map> 21 #include <memory> 22 #include <string> 23 24 #include <android/hardware/boot/1.0/IBootControl.h> 25 #include <base/files/file_util.h> 26 #include <liblp/builder.h> 27 28 #include "update_engine/common/boot_control.h" 29 #include "update_engine/dynamic_partition_control_interface.h" 30 31 namespace chromeos_update_engine { 32 33 // The Android implementation of the BootControlInterface. This implementation 34 // uses the libhardware's boot_control HAL to access the bootloader. 35 class BootControlAndroid : public BootControlInterface { 36 public: 37 BootControlAndroid() = default; 38 ~BootControlAndroid() = default; 39 40 // Load boot_control HAL implementation using libhardware and 41 // initializes it. Returns false if an error occurred. 42 bool Init(); 43 44 // BootControlInterface overrides. 45 unsigned int GetNumSlots() const override; 46 BootControlInterface::Slot GetCurrentSlot() const override; 47 bool GetPartitionDevice(const std::string& partition_name, 48 BootControlInterface::Slot slot, 49 std::string* device) const override; 50 bool IsSlotBootable(BootControlInterface::Slot slot) const override; 51 bool MarkSlotUnbootable(BootControlInterface::Slot slot) override; 52 bool SetActiveBootSlot(BootControlInterface::Slot slot) override; 53 bool MarkBootSuccessfulAsync(base::Callback<void(bool)> callback) override; 54 bool InitPartitionMetadata(Slot slot, 55 const PartitionMetadata& partition_metadata, 56 bool update_metadata) override; 57 void Cleanup() override; 58 59 private: 60 ::android::sp<::android::hardware::boot::V1_0::IBootControl> module_; 61 std::unique_ptr<DynamicPartitionControlInterface> dynamic_control_; 62 63 friend class BootControlAndroidTest; 64 65 // Wrapper method of IBootControl::getSuffix(). 66 bool GetSuffix(Slot slot, std::string* out) const; 67 68 enum class DynamicPartitionDeviceStatus { 69 SUCCESS, 70 ERROR, 71 TRY_STATIC, 72 }; 73 74 DynamicPartitionDeviceStatus GetDynamicPartitionDevice( 75 const base::FilePath& device_dir, 76 const std::string& partition_name_suffix, 77 Slot slot, 78 std::string* device) const; 79 80 // Return true if |partition_name_suffix| is a block device of 81 // super partition metadata slot |slot|. 82 bool IsSuperBlockDevice(const base::FilePath& device_dir, 83 Slot slot, 84 const std::string& partition_name_suffix) const; 85 86 // Whether the target partitions should be loaded as dynamic partitions. Set 87 // by InitPartitionMetadata() per each update. 88 bool is_target_dynamic_{false}; 89 90 DISALLOW_COPY_AND_ASSIGN(BootControlAndroid); 91 }; 92 93 } // namespace chromeos_update_engine 94 95 #endif // UPDATE_ENGINE_BOOT_CONTROL_ANDROID_H_ 96