tools/lib/bpf/bpf.h

   1 /*
   2  * common eBPF ELF operations.
   3  *
   4  * Copyright (C) 2013-2015 Alexei Starovoitov <ast@kernel.org>
   5  * Copyright (C) 2015 Wang Nan <wangnan0@huawei.com>
   6  * Copyright (C) 2015 Huawei Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation;
  11  * version 2.1 of the License (not later!)
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this program; if not,  see <http://www.gnu.org/licenses>
  20  */
  21 #ifndef __BPF_BPF_H
  22 #define __BPF_BPF_H
  23
  24 #include <linux/bpf.h>
  25 #include <stddef.h>
  26
  27 int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
  28                    int max_entries, __u32 map_flags);
  29 int bpf_create_map_in_map(enum bpf_map_type map_type, int key_size,
  30                           int inner_map_fd, int max_entries, __u32 map_flags);
  31
  32 /* Recommend log buffer size */
  33 #define BPF_LOG_BUF_SIZE 65536
  34 int bpf_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
  35                      size_t insns_cnt, const char *license,
  36                      __u32 kern_version, char *log_buf,
  37                      size_t log_buf_sz);
  38 int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns,
  39                        size_t insns_cnt, int strict_alignment,
  40                        const char *license, __u32 kern_version,
  41                        char *log_buf, size_t log_buf_sz, int log_level);
  42
  43 int bpf_map_update_elem(int fd, const void *key, const void *value,
  44                         __u64 flags);
  45
  46 int bpf_map_lookup_elem(int fd, const void *key, void *value);
  47 int bpf_map_delete_elem(int fd, const void *key);
  48 int bpf_map_get_next_key(int fd, const void *key, void *next_key);
  49 int bpf_obj_pin(int fd, const char *pathname);
  50 int bpf_obj_get(const char *pathname);
  51 int bpf_prog_attach(int prog_fd, int attachable_fd, enum bpf_attach_type type,
  52                     unsigned int flags);
  53 int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
  54 int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
  55                       void *data_out, __u32 *size_out, __u32 *retval,
  56                       __u32 *duration);
  57 int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
  58 int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
  59 int bpf_prog_get_fd_by_id(__u32 id);
  60 int bpf_map_get_fd_by_id(__u32 id);
  61 int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);
  62
  63 #endif