LXR linux/tools/lib/bpf/bpf.h

   1/* SPDX-License-Identifier: LGPL-2.1 */
   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 __BPF_BPF_H
  24#define __BPF_BPF_H
  25
  26#include <linux/bpf.h>
  27#include <stdbool.h>
  28#include <stddef.h>
  29
  30struct bpf_create_map_attr {
  31        const char *name;
  32        enum bpf_map_type map_type;
  33        __u32 map_flags;
  34        __u32 key_size;
  35        __u32 value_size;
  36        __u32 max_entries;
  37        __u32 numa_node;
  38        __u32 btf_fd;
  39        __u32 btf_key_type_id;
  40        __u32 btf_value_type_id;
  41        __u32 map_ifindex;
  42};
  43
  44int bpf_create_map_xattr(const struct bpf_create_map_attr *create_attr);
  45int bpf_create_map_node(enum bpf_map_type map_type, const char *name,
  46                        int key_size, int value_size, int max_entries,
  47                        __u32 map_flags, int node);
  48int bpf_create_map_name(enum bpf_map_type map_type, const char *name,
  49                        int key_size, int value_size, int max_entries,
  50                        __u32 map_flags);
  51int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size,
  52                   int max_entries, __u32 map_flags);
  53int bpf_create_map_in_map_node(enum bpf_map_type map_type, const char *name,
  54                               int key_size, int inner_map_fd, int max_entries,
  55                               __u32 map_flags, int node);
  56int bpf_create_map_in_map(enum bpf_map_type map_type, const char *name,
  57                          int key_size, int inner_map_fd, int max_entries,
  58                          __u32 map_flags);
  59
  60struct bpf_load_program_attr {
  61        enum bpf_prog_type prog_type;
  62        enum bpf_attach_type expected_attach_type;
  63        const char *name;
  64        const struct bpf_insn *insns;
  65        size_t insns_cnt;
  66        const char *license;
  67        __u32 kern_version;
  68        __u32 prog_ifindex;
  69};
  70
  71/* Recommend log buffer size */
  72#define BPF_LOG_BUF_SIZE (256 * 1024)
  73int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
  74                           char *log_buf, size_t log_buf_sz);
  75int bpf_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
  76                     size_t insns_cnt, const char *license,
  77                     __u32 kern_version, char *log_buf,
  78                     size_t log_buf_sz);
  79int bpf_verify_program(enum bpf_prog_type type, const struct bpf_insn *insns,
  80                       size_t insns_cnt, int strict_alignment,
  81                       const char *license, __u32 kern_version,
  82                       char *log_buf, size_t log_buf_sz, int log_level);
  83
  84int bpf_map_update_elem(int fd, const void *key, const void *value,
  85                        __u64 flags);
  86
  87int bpf_map_lookup_elem(int fd, const void *key, void *value);
  88int bpf_map_delete_elem(int fd, const void *key);
  89int bpf_map_get_next_key(int fd, const void *key, void *next_key);
  90int bpf_obj_pin(int fd, const char *pathname);
  91int bpf_obj_get(const char *pathname);
  92int bpf_prog_attach(int prog_fd, int attachable_fd, enum bpf_attach_type type,
  93                    unsigned int flags);
  94int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
  95int bpf_prog_detach2(int prog_fd, int attachable_fd, enum bpf_attach_type type);
  96int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
  97                      void *data_out, __u32 *size_out, __u32 *retval,
  98                      __u32 *duration);
  99int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);
 100int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);
 101int bpf_prog_get_fd_by_id(__u32 id);
 102int bpf_map_get_fd_by_id(__u32 id);
 103int bpf_btf_get_fd_by_id(__u32 id);
 104int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);
 105int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,
 106                   __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt);
 107int bpf_raw_tracepoint_open(const char *name, int prog_fd);
 108int bpf_load_btf(void *btf, __u32 btf_size, char *log_buf, __u32 log_buf_size,
 109                 bool do_log);
 110int bpf_task_fd_query(int pid, int fd, __u32 flags, char *buf, __u32 *buf_len,
 111                      __u32 *prog_id, __u32 *fd_type, __u64 *probe_offset,
 112                      __u64 *probe_addr);
 113#endif
 114