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Linux kernel mirror (for testing)
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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
32extern "C" {
33#endif
34
35#ifndef LIBBPF_API
36#define LIBBPF_API __attribute__((visibility("default")))
37#endif
38
39struct 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
54LIBBPF_API int
55bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr);
56LIBBPF_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);
59LIBBPF_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);
62LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size,
63 int value_size, int max_entries, __u32 map_flags);
64LIBBPF_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);
68LIBBPF_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
73struct 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 */
98LIBBPF_API int
99bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
100 char *log_buf, size_t log_buf_sz);
101LIBBPF_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);
105LIBBPF_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
112LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value,
113 __u64 flags);
114
115LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value);
116LIBBPF_API int bpf_map_lookup_elem_flags(int fd, const void *key, void *value,
117 __u64 flags);
118LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key,
119 void *value);
120LIBBPF_API int bpf_map_delete_elem(int fd, const void *key);
121LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key);
122LIBBPF_API int bpf_map_freeze(int fd);
123LIBBPF_API int bpf_obj_pin(int fd, const char *pathname);
124LIBBPF_API int bpf_obj_get(const char *pathname);
125LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd,
126 enum bpf_attach_type type, unsigned int flags);
127LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
128LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd,
129 enum bpf_attach_type type);
130
131struct 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
148LIBBPF_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 */
154LIBBPF_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);
157LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
158LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
159LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id);
160LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);
161LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id);
162LIBBPF_API int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);
163LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type,
164 __u32 query_flags, __u32 *attach_flags,
165 __u32 *prog_ids, __u32 *prog_cnt);
166LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd);
167LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf,
168 __u32 log_buf_size, bool do_log);
169LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf,
170 __u32 *buf_len, __u32 *prog_id, __u32 *fd_type,
171 __u64 *probe_offset, __u64 *probe_addr);
172
173#ifdef __cplusplus
174} /* extern "C" */
175#endif
176
177#endif /* __LIBBPF_BPF_H */