tools/lib/bpf/libbpf.h

   1 /*
   2  * Common eBPF ELF object loading 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 #ifndef __BPF_LIBBPF_H
   9 #define __BPF_LIBBPF_H
  10
  11 #include <stdio.h>
  12
  13 /*
  14  * In include/linux/compiler-gcc.h, __printf is defined. However
  15  * it should be better if libbpf.h doesn't depend on Linux header file.
  16  * So instead of __printf, here we use gcc attribute directly.
  17  */
  18 typedef int (*libbpf_print_fn_t)(const char *, ...)
  19         __attribute__((format(printf, 1, 2)));
  20
  21 void libbpf_set_print(libbpf_print_fn_t warn,
  22                       libbpf_print_fn_t info,
  23                       libbpf_print_fn_t debug);
  24
  25 /* Hide internal to user */
  26 struct bpf_object;
  27
  28 struct bpf_object *bpf_object__open(const char *path);
  29 struct bpf_object *bpf_object__open_buffer(void *obj_buf,
  30                                            size_t obj_buf_sz);
  31 void bpf_object__close(struct bpf_object *object);
  32
  33 /*
  34  * We don't need __attribute__((packed)) now since it is
  35  * unnecessary for 'bpf_map_def' because they are all aligned.
  36  * In addition, using it will trigger -Wpacked warning message,
  37  * and will be treated as an error due to -Werror.
  38  */
  39 struct bpf_map_def {
  40         unsigned int type;
  41         unsigned int key_size;
  42         unsigned int value_size;
  43         unsigned int max_entries;
  44 };
  45
  46 #endif