LXR linux/tools/testing/selftests/bpf/progs/test_btf

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright (c) 2018 Facebook */
   3#include <linux/bpf.h>
   4#include <bpf/bpf_helpers.h>
   5
   6int _version SEC("version") = 1;
   7
   8struct ipv_counts {
   9        unsigned int v4;
  10        unsigned int v6;
  11};
  12
  13struct bpf_map_def SEC("maps") btf_map = {
  14        .type = BPF_MAP_TYPE_ARRAY,
  15        .key_size = sizeof(int),
  16        .value_size = sizeof(struct ipv_counts),
  17        .max_entries = 4,
  18};
  19
  20__attribute__((noinline))
  21int test_long_fname_2(void)
  22{
  23        struct ipv_counts *counts;
  24        int key = 0;
  25
  26        counts = bpf_map_lookup_elem(&btf_map, &key);
  27        if (!counts)
  28                return 0;
  29
  30        counts->v6++;
  31
  32        return 0;
  33}
  34
  35__attribute__((noinline))
  36int test_long_fname_1(void)
  37{
  38        return test_long_fname_2();
  39}
  40
  41SEC("dummy_tracepoint")
  42int _dummy_tracepoint(void *arg)
  43{
  44        return test_long_fname_1();
  45}
  46
  47char _license[] SEC("license") = "GPL";
  48