1 /* 2 * Copyright (C) 2018 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 SRC_TRACED_PROBES_FILESYSTEM_FILE_SCANNER_H_ 18 #define SRC_TRACED_PROBES_FILESYSTEM_FILE_SCANNER_H_ 19 20 #include <string> 21 #include <vector> 22 23 #include "perfetto/base/scoped_file.h" 24 #include "perfetto/base/task_runner.h" 25 #include "perfetto/base/weak_ptr.h" 26 #include "perfetto/traced/data_source_types.h" 27 28 namespace perfetto { 29 30 class FileScanner { 31 public: 32 class Delegate { 33 public: 34 virtual bool OnInodeFound(BlockDeviceID, 35 Inode, 36 const std::string&, 37 protos::pbzero::InodeFileMap_Entry_Type) = 0; 38 virtual void OnInodeScanDone() = 0; 39 virtual ~Delegate(); 40 }; 41 42 FileScanner(std::vector<std::string> root_directories, 43 Delegate* delegate, 44 uint32_t scan_interval_ms, 45 uint32_t scan_steps); 46 47 // Ctor when only the blocking version of Scan is used. 48 FileScanner(std::vector<std::string> root_directories, Delegate* delegate); 49 50 FileScanner(const FileScanner&) = delete; 51 FileScanner& operator=(const FileScanner&) = delete; 52 53 void Scan(base::TaskRunner* task_runner); 54 void Scan(); 55 56 private: 57 void NextDirectory(); 58 void Step(); 59 void Steps(uint32_t n); 60 bool Done(); 61 62 Delegate* delegate_; 63 const uint32_t scan_interval_ms_; 64 const uint32_t scan_steps_; 65 66 std::vector<std::string> queue_; 67 base::ScopedDir current_dir_handle_; 68 std::string current_directory_; 69 BlockDeviceID current_block_device_id_; 70 base::WeakPtrFactory<FileScanner> weak_factory_; // Keep last. 71 }; 72 73 } // namespace perfetto 74 75 #endif // SRC_TRACED_PROBES_FILESYSTEM_FILE_SCANNER_H_ 76