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 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 #ifndef LIBBPF_API 36 #define LIBBPF_API __attribute__((visibility("default"))) 37 #endif 38 39 struct bpf_create_map_attr { 40 const char *name; 41 enum bpf_map_type map_type; 42 __u32 map_flags; 43 __u32 key_size; 44 __u32 value_size; 45 __u32 max_entries; 46 __u32 numa_node; 47 __u32 btf_fd; 48 __u32 btf_key_type_id; 49 __u32 btf_value_type_id; 50 __u32 map_ifindex; 51 __u32 inner_map_fd; 52 }; 53 54 LIBBPF_API int 55 bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr); 56 LIBBPF_API int bpf_create_map_node(enum bpf_map_type map_type, const char *name, 57 int key_size, int value_size, 58 int max_entries, __u32 map_flags, int node); 59 LIBBPF_API int bpf_create_map_name(enum bpf_map_type map_type, const char *name, 60 int key_size, int value_size, 61 int max_entries, __u32 map_flags); 62 LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size, 63 int value_size, int max_entries, __u32 map_flags); 64 LIBBPF_API int bpf_create_map_in_map_node(enum bpf_map_type map_type, 65 const char *name, int key_size, 66 int inner_map_fd, int max_entries, 67 __u32 map_flags, int node); 68 LIBBPF_API int bpf_create_map_in_map(enum bpf_map_type map_type, 69 const char *name, int key_size, 70 int inner_map_fd, int max_entries, 71 __u32 map_flags); 72 73 struct bpf_load_program_attr { 74 enum bpf_prog_type prog_type; 75 enum bpf_attach_type expected_attach_type; 76 const char *name; 77 const struct bpf_insn *insns; 78 size_t insns_cnt; 79 const char *license; 80 __u32 kern_version; 81 __u32 prog_ifindex; 82 __u32 prog_btf_fd; 83 __u32 func_info_rec_size; 84 const void *func_info; 85 __u32 func_info_cnt; 86 __u32 line_info_rec_size; 87 const void *line_info; 88 __u32 line_info_cnt; 89 __u32 log_level; 90 }; 91 92 /* Flags to direct loading requirements */ 93 #define MAPS_RELAX_COMPAT 0x01 94 95 /* Recommend log buffer size */ 96 #define BPF_LOG_BUF_SIZE (UINT32_MAX >> 8) /* verifier maximum in kernels <= 5.1 */ 97 LIBBPF_API int 98 bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr, 99 char *log_buf, size_t log_buf_sz); 100 LIBBPF_API int bpf_load_program(enum bpf_prog_type type, 101 const struct bpf_insn *insns, size_t insns_cnt, 102 const char *license, __u32 kern_version, 103 char *log_buf, size_t log_buf_sz); 104 LIBBPF_API int bpf_verify_program(enum bpf_prog_type type, 105 const struct bpf_insn *insns, 106 size_t insns_cnt, __u32 prog_flags, 107 const char *license, __u32 kern_version, 108 char *log_buf, size_t log_buf_sz, 109 int log_level); 110 111 LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value, 112 __u64 flags); 113 114 LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value); 115 LIBBPF_API int bpf_map_lookup_elem_flags(int fd, const void *key, void *value, 116 __u64 flags); 117 LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key, 118 void *value); 119 LIBBPF_API int bpf_map_delete_elem(int fd, const void *key); 120 LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key); 121 LIBBPF_API int bpf_map_freeze(int fd); 122 LIBBPF_API int bpf_obj_pin(int fd, const char *pathname); 123 LIBBPF_API int bpf_obj_get(const char *pathname); 124 LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd, 125 enum bpf_attach_type type, unsigned int flags); 126 LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type); 127 LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd, 128 enum bpf_attach_type type); 129 130 struct bpf_prog_test_run_attr { 131 int prog_fd; 132 int repeat; 133 const void *data_in; 134 __u32 data_size_in; 135 void *data_out; /* optional */ 136 __u32 data_size_out; /* in: max length of data_out 137 * out: length of data_out */ 138 __u32 retval; /* out: return code of the BPF program */ 139 __u32 duration; /* out: average per repetition in ns */ 140 const void *ctx_in; /* optional */ 141 __u32 ctx_size_in; 142 void *ctx_out; /* optional */ 143 __u32 ctx_size_out; /* in: max length of ctx_out 144 * out: length of cxt_out */ 145 }; 146 147 LIBBPF_API int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr); 148 149 /* 150 * bpf_prog_test_run does not check that data_out is large enough. Consider 151 * using bpf_prog_test_run_xattr instead. 152 */ 153 LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data, 154 __u32 size, void *data_out, __u32 *size_out, 155 __u32 *retval, __u32 *duration); 156 LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id); 157 LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id); 158 LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id); 159 LIBBPF_API int bpf_map_get_fd_by_id(__u32 id); 160 LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id); 161 LIBBPF_API int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len); 162 LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type, 163 __u32 query_flags, __u32 *attach_flags, 164 __u32 *prog_ids, __u32 *prog_cnt); 165 LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd); 166 LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf, 167 __u32 log_buf_size, bool do_log); 168 LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, 169 __u32 *buf_len, __u32 *prog_id, __u32 *fd_type, 170 __u64 *probe_offset, __u64 *probe_addr); 171 172 #ifdef __cplusplus 173 } /* extern "C" */ 174 #endif 175 176 #endif /* __LIBBPF_BPF_H */ 177