1 /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ 2 3 /* 4 * common eBPF ELF operations. 5 * 6 * Copyright (C) 2013-2015 Alexei Starovoitov <ast@kernel.org> 7 * Copyright (C) 2015 Wang Nan <wangnan0@huawei.com> 8 * Copyright (C) 2015 Huawei Inc. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU Lesser General Public 12 * License as published by the Free Software Foundation; 13 * version 2.1 of the License (not later!) 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU Lesser General Public License for more details. 19 * 20 * You should have received a copy of the GNU Lesser General Public 21 * License along with this program; if not, see <http://www.gnu.org/licenses> 22 */ 23 #ifndef __LIBBPF_BPF_H 24 #define __LIBBPF_BPF_H 25 26 #include <linux/bpf.h> 27 #include <stdbool.h> 28 #include <stddef.h> 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 #ifndef LIBBPF_API 35 #define LIBBPF_API __attribute__((visibility("default"))) 36 #endif 37 38 struct bpf_create_map_attr { 39 const char *name; 40 enum bpf_map_type map_type; 41 __u32 map_flags; 42 __u32 key_size; 43 __u32 value_size; 44 __u32 max_entries; 45 __u32 numa_node; 46 __u32 btf_fd; 47 __u32 btf_key_type_id; 48 __u32 btf_value_type_id; 49 __u32 map_ifindex; 50 __u32 inner_map_fd; 51 }; 52 53 LIBBPF_API int 54 bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr); 55 LIBBPF_API int bpf_create_map_node(enum bpf_map_type map_type, const char *name, 56 int key_size, int value_size, 57 int max_entries, __u32 map_flags, int node); 58 LIBBPF_API int bpf_create_map_name(enum bpf_map_type map_type, const char *name, 59 int key_size, int value_size, 60 int max_entries, __u32 map_flags); 61 LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size, 62 int value_size, int max_entries, __u32 map_flags); 63 LIBBPF_API int bpf_create_map_in_map_node(enum bpf_map_type map_type, 64 const char *name, int key_size, 65 int inner_map_fd, int max_entries, 66 __u32 map_flags, int node); 67 LIBBPF_API int bpf_create_map_in_map(enum bpf_map_type map_type, 68 const char *name, int key_size, 69 int inner_map_fd, int max_entries, 70 __u32 map_flags); 71 72 struct bpf_load_program_attr { 73 enum bpf_prog_type prog_type; 74 enum bpf_attach_type expected_attach_type; 75 const char *name; 76 const struct bpf_insn *insns; 77 size_t insns_cnt; 78 const char *license; 79 __u32 kern_version; 80 __u32 prog_ifindex; 81 __u32 prog_btf_fd; 82 __u32 func_info_rec_size; 83 const void *func_info; 84 __u32 func_info_cnt; 85 __u32 line_info_rec_size; 86 const void *line_info; 87 __u32 line_info_cnt; 88 }; 89 90 /* Flags to direct loading requirements */ 91 #define MAPS_RELAX_COMPAT 0x01 92 93 /* Recommend log buffer size */ 94 #define BPF_LOG_BUF_SIZE (256 * 1024) 95 LIBBPF_API int 96 bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr, 97 char *log_buf, size_t log_buf_sz); 98 LIBBPF_API int bpf_load_program(enum bpf_prog_type type, 99 const struct bpf_insn *insns, size_t insns_cnt, 100 const char *license, __u32 kern_version, 101 char *log_buf, size_t log_buf_sz); 102 LIBBPF_API int bpf_verify_program(enum bpf_prog_type type, 103 const struct bpf_insn *insns, 104 size_t insns_cnt, __u32 prog_flags, 105 const char *license, __u32 kern_version, 106 char *log_buf, size_t log_buf_sz, 107 int log_level); 108 109 LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value, 110 __u64 flags); 111 112 LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value); 113 LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key, 114 void *value); 115 LIBBPF_API int bpf_map_delete_elem(int fd, const void *key); 116 LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key); 117 LIBBPF_API int bpf_obj_pin(int fd, const char *pathname); 118 LIBBPF_API int bpf_obj_get(const char *pathname); 119 LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd, 120 enum bpf_attach_type type, unsigned int flags); 121 LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type); 122 LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd, 123 enum bpf_attach_type type); 124 125 struct bpf_prog_test_run_attr { 126 int prog_fd; 127 int repeat; 128 const void *data_in; 129 __u32 data_size_in; 130 void *data_out; /* optional */ 131 __u32 data_size_out; /* in: max length of data_out 132 * out: length of data_out */ 133 __u32 retval; /* out: return code of the BPF program */ 134 __u32 duration; /* out: average per repetition in ns */ 135 }; 136 137 LIBBPF_API int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr); 138 139 /* 140 * bpf_prog_test_run does not check that data_out is large enough. Consider 141 * using bpf_prog_test_run_xattr instead. 142 */ 143 LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data, 144 __u32 size, void *data_out, __u32 *size_out, 145 __u32 *retval, __u32 *duration); 146 LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id); 147 LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id); 148 LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id); 149 LIBBPF_API int bpf_map_get_fd_by_id(__u32 id); 150 LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id); 151 LIBBPF_API int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len); 152 LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type, 153 __u32 query_flags, __u32 *attach_flags, 154 __u32 *prog_ids, __u32 *prog_cnt); 155 LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd); 156 LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf, 157 __u32 log_buf_size, bool do_log); 158 LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, 159 __u32 *buf_len, __u32 *prog_id, __u32 *fd_type, 160 __u64 *probe_offset, __u64 *probe_addr); 161 162 #ifdef __cplusplus 163 } /* extern "C" */ 164 #endif 165 166 #endif /* __LIBBPF_BPF_H */ 167