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 #include <stdint.h> 30 31 #include "libbpf_common.h" 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 struct bpf_create_map_attr { 38 const char *name; 39 enum bpf_map_type map_type; 40 __u32 map_flags; 41 __u32 key_size; 42 __u32 value_size; 43 __u32 max_entries; 44 __u32 numa_node; 45 __u32 btf_fd; 46 __u32 btf_key_type_id; 47 __u32 btf_value_type_id; 48 __u32 map_ifindex; 49 union { 50 __u32 inner_map_fd; 51 __u32 btf_vmlinux_value_type_id; 52 }; 53 }; 54 55 LIBBPF_API int 56 bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr); 57 LIBBPF_API int bpf_create_map_node(enum bpf_map_type map_type, const char *name, 58 int key_size, int value_size, 59 int max_entries, __u32 map_flags, int node); 60 LIBBPF_API int bpf_create_map_name(enum bpf_map_type map_type, const char *name, 61 int key_size, int value_size, 62 int max_entries, __u32 map_flags); 63 LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size, 64 int value_size, int max_entries, __u32 map_flags); 65 LIBBPF_API int bpf_create_map_in_map_node(enum bpf_map_type map_type, 66 const char *name, int key_size, 67 int inner_map_fd, int max_entries, 68 __u32 map_flags, int node); 69 LIBBPF_API int bpf_create_map_in_map(enum bpf_map_type map_type, 70 const char *name, int key_size, 71 int inner_map_fd, int max_entries, 72 __u32 map_flags); 73 74 struct bpf_load_program_attr { 75 enum bpf_prog_type prog_type; 76 enum bpf_attach_type expected_attach_type; 77 const char *name; 78 const struct bpf_insn *insns; 79 size_t insns_cnt; 80 const char *license; 81 union { 82 __u32 kern_version; 83 __u32 attach_prog_fd; 84 }; 85 union { 86 __u32 prog_ifindex; 87 __u32 attach_btf_id; 88 }; 89 __u32 prog_btf_fd; 90 __u32 func_info_rec_size; 91 const void *func_info; 92 __u32 func_info_cnt; 93 __u32 line_info_rec_size; 94 const void *line_info; 95 __u32 line_info_cnt; 96 __u32 log_level; 97 __u32 prog_flags; 98 }; 99 100 /* Flags to direct loading requirements */ 101 #define MAPS_RELAX_COMPAT 0x01 102 103 /* Recommend log buffer size */ 104 #define BPF_LOG_BUF_SIZE (UINT32_MAX >> 8) /* verifier maximum in kernels <= 5.1 */ 105 LIBBPF_API int 106 bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr, 107 char *log_buf, size_t log_buf_sz); 108 LIBBPF_API int bpf_load_program(enum bpf_prog_type type, 109 const struct bpf_insn *insns, size_t insns_cnt, 110 const char *license, __u32 kern_version, 111 char *log_buf, size_t log_buf_sz); 112 LIBBPF_API int bpf_verify_program(enum bpf_prog_type type, 113 const struct bpf_insn *insns, 114 size_t insns_cnt, __u32 prog_flags, 115 const char *license, __u32 kern_version, 116 char *log_buf, size_t log_buf_sz, 117 int log_level); 118 119 LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value, 120 __u64 flags); 121 122 LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value); 123 LIBBPF_API int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, 124 __u64 flags); 125 LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key, 126 void *value); 127 LIBBPF_API int bpf_map_delete_elem(int fd, const void *key); 128 LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key); 129 LIBBPF_API int bpf_map_freeze(int fd); 130 131 struct bpf_map_batch_opts { 132 size_t sz; /* size of this struct for forward/backward compatibility */ 133 __u64 elem_flags; 134 __u64 flags; 135 }; 136 #define bpf_map_batch_opts__last_field flags 137 138 LIBBPF_API int bpf_map_delete_batch(int fd, void *keys, 139 __u32 *count, 140 const struct bpf_map_batch_opts *opts); 141 LIBBPF_API int bpf_map_lookup_batch(int fd, void *in_batch, void *out_batch, 142 void *keys, void *values, __u32 *count, 143 const struct bpf_map_batch_opts *opts); 144 LIBBPF_API int bpf_map_lookup_and_delete_batch(int fd, void *in_batch, 145 void *out_batch, void *keys, 146 void *values, __u32 *count, 147 const struct bpf_map_batch_opts *opts); 148 LIBBPF_API int bpf_map_update_batch(int fd, void *keys, void *values, 149 __u32 *count, 150 const struct bpf_map_batch_opts *opts); 151 152 LIBBPF_API int bpf_obj_pin(int fd, const char *pathname); 153 LIBBPF_API int bpf_obj_get(const char *pathname); 154 155 struct bpf_prog_attach_opts { 156 size_t sz; /* size of this struct for forward/backward compatibility */ 157 unsigned int flags; 158 int replace_prog_fd; 159 }; 160 #define bpf_prog_attach_opts__last_field replace_prog_fd 161 162 LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd, 163 enum bpf_attach_type type, unsigned int flags); 164 LIBBPF_API int bpf_prog_attach_xattr(int prog_fd, int attachable_fd, 165 enum bpf_attach_type type, 166 const struct bpf_prog_attach_opts *opts); 167 LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type); 168 LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd, 169 enum bpf_attach_type type); 170 171 union bpf_iter_link_info; /* defined in up-to-date linux/bpf.h */ 172 struct bpf_link_create_opts { 173 size_t sz; /* size of this struct for forward/backward compatibility */ 174 __u32 flags; 175 union bpf_iter_link_info *iter_info; 176 __u32 iter_info_len; 177 __u32 target_btf_id; 178 }; 179 #define bpf_link_create_opts__last_field target_btf_id 180 181 LIBBPF_API int bpf_link_create(int prog_fd, int target_fd, 182 enum bpf_attach_type attach_type, 183 const struct bpf_link_create_opts *opts); 184 185 LIBBPF_API int bpf_link_detach(int link_fd); 186 187 struct bpf_link_update_opts { 188 size_t sz; /* size of this struct for forward/backward compatibility */ 189 __u32 flags; /* extra flags */ 190 __u32 old_prog_fd; /* expected old program FD */ 191 }; 192 #define bpf_link_update_opts__last_field old_prog_fd 193 194 LIBBPF_API int bpf_link_update(int link_fd, int new_prog_fd, 195 const struct bpf_link_update_opts *opts); 196 197 LIBBPF_API int bpf_iter_create(int link_fd); 198 199 struct bpf_prog_test_run_attr { 200 int prog_fd; 201 int repeat; 202 const void *data_in; 203 __u32 data_size_in; 204 void *data_out; /* optional */ 205 __u32 data_size_out; /* in: max length of data_out 206 * out: length of data_out */ 207 __u32 retval; /* out: return code of the BPF program */ 208 __u32 duration; /* out: average per repetition in ns */ 209 const void *ctx_in; /* optional */ 210 __u32 ctx_size_in; 211 void *ctx_out; /* optional */ 212 __u32 ctx_size_out; /* in: max length of ctx_out 213 * out: length of cxt_out */ 214 }; 215 216 LIBBPF_API int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr); 217 218 /* 219 * bpf_prog_test_run does not check that data_out is large enough. Consider 220 * using bpf_prog_test_run_xattr instead. 221 */ 222 LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data, 223 __u32 size, void *data_out, __u32 *size_out, 224 __u32 *retval, __u32 *duration); 225 LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id); 226 LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id); 227 LIBBPF_API int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id); 228 LIBBPF_API int bpf_link_get_next_id(__u32 start_id, __u32 *next_id); 229 LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id); 230 LIBBPF_API int bpf_map_get_fd_by_id(__u32 id); 231 LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id); 232 LIBBPF_API int bpf_link_get_fd_by_id(__u32 id); 233 LIBBPF_API int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len); 234 LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type, 235 __u32 query_flags, __u32 *attach_flags, 236 __u32 *prog_ids, __u32 *prog_cnt); 237 LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd); 238 LIBBPF_API int bpf_load_btf(const void *btf, __u32 btf_size, char *log_buf, 239 __u32 log_buf_size, bool do_log); 240 LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, 241 __u32 *buf_len, __u32 *prog_id, __u32 *fd_type, 242 __u64 *probe_offset, __u64 *probe_addr); 243 244 enum bpf_stats_type; /* defined in up-to-date linux/bpf.h */ 245 LIBBPF_API int bpf_enable_stats(enum bpf_stats_type type); 246 247 struct bpf_prog_bind_opts { 248 size_t sz; /* size of this struct for forward/backward compatibility */ 249 __u32 flags; 250 }; 251 #define bpf_prog_bind_opts__last_field flags 252 253 LIBBPF_API int bpf_prog_bind_map(int prog_fd, int map_fd, 254 const struct bpf_prog_bind_opts *opts); 255 256 struct bpf_test_run_opts { 257 size_t sz; /* size of this struct for forward/backward compatibility */ 258 const void *data_in; /* optional */ 259 void *data_out; /* optional */ 260 __u32 data_size_in; 261 __u32 data_size_out; /* in: max length of data_out 262 * out: length of data_out 263 */ 264 const void *ctx_in; /* optional */ 265 void *ctx_out; /* optional */ 266 __u32 ctx_size_in; 267 __u32 ctx_size_out; /* in: max length of ctx_out 268 * out: length of cxt_out 269 */ 270 __u32 retval; /* out: return code of the BPF program */ 271 int repeat; 272 __u32 duration; /* out: average per repetition in ns */ 273 __u32 flags; 274 __u32 cpu; 275 }; 276 #define bpf_test_run_opts__last_field cpu 277 278 LIBBPF_API int bpf_prog_test_run_opts(int prog_fd, 279 struct bpf_test_run_opts *opts); 280 281 #ifdef __cplusplus 282 } /* extern "C" */ 283 #endif 284 285 #endif /* __LIBBPF_BPF_H */ 286