root/tools/lib/bpf/bpf.h

INCLUDED FROM

   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         __u32 prog_flags;
  91 };
  92 
  93 /* Flags to direct loading requirements */
  94 #define MAPS_RELAX_COMPAT       0x01
  95 
  96 /* Recommend log buffer size */
  97 #define BPF_LOG_BUF_SIZE (UINT32_MAX >> 8) /* verifier maximum in kernels <= 5.1 */
  98 LIBBPF_API int
  99 bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
 100                        char *log_buf, size_t log_buf_sz);
 101 LIBBPF_API int bpf_load_program(enum bpf_prog_type type,
 102                                 const struct bpf_insn *insns, size_t insns_cnt,
 103                                 const char *license, __u32 kern_version,
 104                                 char *log_buf, size_t log_buf_sz);
 105 LIBBPF_API int bpf_verify_program(enum bpf_prog_type type,
 106                                   const struct bpf_insn *insns,
 107                                   size_t insns_cnt, __u32 prog_flags,
 108                                   const char *license, __u32 kern_version,
 109                                   char *log_buf, size_t log_buf_sz,
 110                                   int log_level);
 111 
 112 LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value,
 113                                    __u64 flags);
 114 
 115 LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value);
 116 LIBBPF_API int bpf_map_lookup_elem_flags(int fd, const void *key, void *value,
 117                                          __u64 flags);
 118 LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key,
 119                                               void *value);
 120 LIBBPF_API int bpf_map_delete_elem(int fd, const void *key);
 121 LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key);
 122 LIBBPF_API int bpf_map_freeze(int fd);
 123 LIBBPF_API int bpf_obj_pin(int fd, const char *pathname);
 124 LIBBPF_API int bpf_obj_get(const char *pathname);
 125 LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd,
 126                                enum bpf_attach_type type, unsigned int flags);
 127 LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
 128 LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd,
 129                                 enum bpf_attach_type type);
 130 
 131 struct bpf_prog_test_run_attr {
 132         int prog_fd;
 133         int repeat;
 134         const void *data_in;
 135         __u32 data_size_in;
 136         void *data_out;      /* optional */
 137         __u32 data_size_out; /* in: max length of data_out
 138                               * out: length of data_out */
 139         __u32 retval;        /* out: return code of the BPF program */
 140         __u32 duration;      /* out: average per repetition in ns */
 141         const void *ctx_in; /* optional */
 142         __u32 ctx_size_in;
 143         void *ctx_out;      /* optional */
 144         __u32 ctx_size_out; /* in: max length of ctx_out
 145                              * out: length of cxt_out */
 146 };
 147 
 148 LIBBPF_API int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr);
 149 
 150 /*
 151  * bpf_prog_test_run does not check that data_out is large enough. Consider
 152  * using bpf_prog_test_run_xattr instead.
 153  */
 154 LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data,
 155                                  __u32 size, void *data_out, __u32 *size_out,
 156                                  __u32 *retval, __u32 *duration);
 157 LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
 158 LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
 159 LIBBPF_API int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id);
 160 LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id);
 161 LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);
 162 LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id);
 163 LIBBPF_API int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);
 164 LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type,
 165                               __u32 query_flags, __u32 *attach_flags,
 166                               __u32 *prog_ids, __u32 *prog_cnt);
 167 LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd);
 168 LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf,
 169                             __u32 log_buf_size, bool do_log);
 170 LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
 171                                  __u32 *buf_len, __u32 *prog_id, __u32 *fd_type,
 172                                  __u64 *probe_offset, __u64 *probe_addr);
 173 
 174 #ifdef __cplusplus
 175 } /* extern "C" */
 176 #endif
 177 
 178 #endif /* __LIBBPF_BPF_H */