1 // Copyright (C) 2023 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #pragma once 16 17 #include <stddef.h> 18 19 #include <memory> 20 #include <string> 21 22 #include <android-base/unique_fd.h> 23 #include <libsnapshot/cow_reader.h> 24 #include <snapuserd/snapuserd_buffer.h> 25 #include <snapuserd/snapuserd_kernel.h> 26 27 namespace android { 28 namespace snapshot { 29 30 using android::base::unique_fd; 31 32 class SnapshotHandler; 33 34 class Worker { 35 public: 36 Worker(const std::string& cow_device, const std::string& misc_name, 37 const std::string& base_path_merge, std::shared_ptr<SnapshotHandler> snapuserd); 38 virtual ~Worker() = default; 39 40 virtual bool Init(); 41 42 protected: 43 bool InitializeFds(); 44 bool InitReader(); CloseFds()45 virtual void CloseFds() { base_path_merge_fd_ = {}; } 46 47 std::unique_ptr<CowReader> reader_; 48 49 std::string misc_name_; // Needed for SNAP_LOG. 50 51 unique_fd base_path_merge_fd_; 52 53 std::shared_ptr<SnapshotHandler> snapuserd_; 54 55 private: 56 std::string cow_device_; 57 std::string base_path_merge_; 58 unique_fd cow_fd_; 59 }; 60 61 } // namespace snapshot 62 } // namespace android 63