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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
30#ifdef __cplusplus
31extern "C" {
32#endif
33
34#ifndef LIBBPF_API
35#define LIBBPF_API __attribute__((visibility("default")))
36#endif
37
38struct 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
53LIBBPF_API int
54bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr);
55LIBBPF_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);
58LIBBPF_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);
61LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size,
62 int value_size, int max_entries, __u32 map_flags);
63LIBBPF_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);
67LIBBPF_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
72struct 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)
95LIBBPF_API int
96bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
97 char *log_buf, size_t log_buf_sz);
98LIBBPF_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);
102LIBBPF_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
109LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value,
110 __u64 flags);
111
112LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value);
113LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key,
114 void *value);
115LIBBPF_API int bpf_map_delete_elem(int fd, const void *key);
116LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key);
117LIBBPF_API int bpf_obj_pin(int fd, const char *pathname);
118LIBBPF_API int bpf_obj_get(const char *pathname);
119LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd,
120 enum bpf_attach_type type, unsigned int flags);
121LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
122LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd,
123 enum bpf_attach_type type);
124
125struct 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
137LIBBPF_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 */
143LIBBPF_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);
146LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
147LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
148LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id);
149LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);
150LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id);
151LIBBPF_API int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);
152LIBBPF_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);
155LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd);
156LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf,
157 __u32 log_buf_size, bool do_log);
158LIBBPF_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 */