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#include "bpf_legacy.h"
   6
   7int _version SEC("version") = 1;
   8
   9struct ipv_counts {
  10        unsigned int v4;
  11        unsigned int v6;
  12};
  13
  14struct bpf_map_def SEC("maps") btf_map = {
  15        .type = BPF_MAP_TYPE_ARRAY,
  16        .key_size = sizeof(int),
  17        .value_size = sizeof(struct ipv_counts),
  18        .max_entries = 4,
  19};
  20
  21BPF_ANNOTATE_KV_PAIR(btf_map, int, struct ipv_counts);
  22
  23__attribute__((noinline))
  24int test_long_fname_2(void)
  25{
  26        struct ipv_counts *counts;
  27        int key = 0;
  28
  29        counts = bpf_map_lookup_elem(&btf_map, &key);
  30        if (!counts)
  31                return 0;
  32
  33        counts->v6++;
  34
  35        return 0;
  36}
  37
  38__attribute__((noinline))
  39int test_long_fname_1(void)
  40{
  41        return test_long_fname_2();
  42}
  43
  44SEC("dummy_tracepoint")
  45int _dummy_tracepoint(void *arg)
  46{
  47        return test_long_fname_1();
  48}
  49
  50char _license[] SEC("license") = "GPL";
  51