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 #ifndef LIBBPF_API 31 #define LIBBPF_API __attribute__((visibility("default"))) 32 #endif 33 34 struct bpf_create_map_attr { 35 const char *name; 36 enum bpf_map_type map_type; 37 __u32 map_flags; 38 __u32 key_size; 39 __u32 value_size; 40 __u32 max_entries; 41 __u32 numa_node; 42 __u32 btf_fd; 43 __u32 btf_key_type_id; 44 __u32 btf_value_type_id; 45 __u32 map_ifindex; 46 __u32 inner_map_fd; 47 }; 48 49 LIBBPF_API int 50 bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr); 51 LIBBPF_API int bpf_create_map_node(enum bpf_map_type map_type, const char *name, 52 int key_size, int value_size, 53 int max_entries, __u32 map_flags, int node); 54 LIBBPF_API int bpf_create_map_name(enum bpf_map_type map_type, const char *name, 55 int key_size, int value_size, 56 int max_entries, __u32 map_flags); 57 LIBBPF_API int bpf_create_map(enum bpf_map_type map_type, int key_size, 58 int value_size, int max_entries, __u32 map_flags); 59 LIBBPF_API int bpf_create_map_in_map_node(enum bpf_map_type map_type, 60 const char *name, int key_size, 61 int inner_map_fd, int max_entries, 62 __u32 map_flags, int node); 63 LIBBPF_API int bpf_create_map_in_map(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); 67 68 struct bpf_load_program_attr { 69 enum bpf_prog_type prog_type; 70 enum bpf_attach_type expected_attach_type; 71 const char *name; 72 const struct bpf_insn *insns; 73 size_t insns_cnt; 74 const char *license; 75 __u32 kern_version; 76 __u32 prog_ifindex; 77 }; 78 79 /* Flags to direct loading requirements */ 80 #define MAPS_RELAX_COMPAT 0x01 81 82 /* Recommend log buffer size */ 83 #define BPF_LOG_BUF_SIZE (256 * 1024) 84 LIBBPF_API int 85 bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr, 86 char *log_buf, size_t log_buf_sz); 87 LIBBPF_API int bpf_load_program(enum bpf_prog_type type, 88 const struct bpf_insn *insns, size_t insns_cnt, 89 const char *license, __u32 kern_version, 90 char *log_buf, size_t log_buf_sz); 91 LIBBPF_API int bpf_verify_program(enum bpf_prog_type type, 92 const struct bpf_insn *insns, 93 size_t insns_cnt, int strict_alignment, 94 const char *license, __u32 kern_version, 95 char *log_buf, size_t log_buf_sz, 96 int log_level); 97 98 LIBBPF_API int bpf_map_update_elem(int fd, const void *key, const void *value, 99 __u64 flags); 100 101 LIBBPF_API int bpf_map_lookup_elem(int fd, const void *key, void *value); 102 LIBBPF_API int bpf_map_lookup_and_delete_elem(int fd, const void *key, 103 void *value); 104 LIBBPF_API int bpf_map_delete_elem(int fd, const void *key); 105 LIBBPF_API int bpf_map_get_next_key(int fd, const void *key, void *next_key); 106 LIBBPF_API int bpf_obj_pin(int fd, const char *pathname); 107 LIBBPF_API int bpf_obj_get(const char *pathname); 108 LIBBPF_API int bpf_prog_attach(int prog_fd, int attachable_fd, 109 enum bpf_attach_type type, unsigned int flags); 110 LIBBPF_API int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type); 111 LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd, 112 enum bpf_attach_type type); 113 LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data, 114 __u32 size, void *data_out, __u32 *size_out, 115 __u32 *retval, __u32 *duration); 116 LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id); 117 LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id); 118 LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id); 119 LIBBPF_API int bpf_map_get_fd_by_id(__u32 id); 120 LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id); 121 LIBBPF_API int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len); 122 LIBBPF_API int bpf_prog_query(int target_fd, enum bpf_attach_type type, 123 __u32 query_flags, __u32 *attach_flags, 124 __u32 *prog_ids, __u32 *prog_cnt); 125 LIBBPF_API int bpf_raw_tracepoint_open(const char *name, int prog_fd); 126 LIBBPF_API int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf, 127 __u32 log_buf_size, bool do_log); 128 LIBBPF_API int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, 129 __u32 *buf_len, __u32 *prog_id, __u32 *fd_type, 130 __u64 *probe_offset, __u64 *probe_addr); 131 #endif /* __LIBBPF_BPF_H */ 132