LXR linux/tools/testing/selftests/bpf/bpf

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __BPF_UTIL__
   3#define __BPF_UTIL__
   4
   5#include <stdio.h>
   6#include <stdlib.h>
   7#include <string.h>
   8#include <errno.h>
   9#include <bpf/libbpf.h> /* libbpf_num_possible_cpus */
  10
  11static inline unsigned int bpf_num_possible_cpus(void)
  12{
  13        int possible_cpus = libbpf_num_possible_cpus();
  14
  15        if (possible_cpus < 0) {
  16                printf("Failed to get # of possible cpus: '%s'!\n",
  17                       strerror(-possible_cpus));
  18                exit(1);
  19        }
  20        return possible_cpus;
  21}
  22
  23#define __bpf_percpu_val_align  __attribute__((__aligned__(8)))
  24
  25#define BPF_DECLARE_PERCPU(type, name)                          \
  26        struct { type v; /* padding */ } __bpf_percpu_val_align \
  27                name[bpf_num_possible_cpus()]
  28#define bpf_percpu(name, cpu) name[(cpu)].v
  29
  30#ifndef ARRAY_SIZE
  31# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  32#endif
  33
  34#ifndef sizeof_field
  35#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
  36#endif
  37
  38#ifndef offsetofend
  39#define offsetofend(TYPE, MEMBER) \
  40        (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER))
  41#endif
  42
  43#endif /* __BPF_UTIL__ */
  44