1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * Android BPF library - public API 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 #pragma once 19 20 #ifdef __cplusplus 21 22 #include <linux/bpf.h> 23 24 #include <fstream> 25 26 namespace android { 27 namespace bpf { 28 29 struct Location { 30 const char* const dir = ""; 31 const char* const prefix = ""; 32 const bpf_prog_type* allowedProgTypes = nullptr; 33 size_t allowedProgTypesLength = 0; 34 }; 35 36 // BPF loader implementation. Loads an eBPF ELF object 37 int loadProg(const char* elfPath, bool* isCritical, const Location &location = {}); 38 39 // Exposed for testing 40 unsigned int readSectionUint(const char* name, std::ifstream& elfFile, unsigned int defVal); 41 42 } // namespace bpf 43 } // namespace android 44 45 extern "C" { 46 #else // __cplusplus 47 #define __noreturn 48 #endif // __cplusplus 49 50 // The C++ portion of the BpfLoader is exposed as 3 functions to be called in order. 51 void initLogging(); 52 void createBpfFsSubDirectories(); 53 void legacyBpfLoader(); 54 __noreturn void execNetBpfLoadDone(); 55 56 #ifdef __cplusplus 57 } // extern C 58 #endif 59