tools/testing/selftests/bpf/progs/test_btf_nokv.c

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (c) 2018 Facebook */
   3 #include <linux/bpf.h>
   4 #include <bpf/bpf_helpers.h>
   5
   6 int _version SEC("version") = 1;
   7
   8 struct ipv_counts {
   9         unsigned int v4;
  10         unsigned int v6;
  11 };
  12
  13 struct 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))
  21 int 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))
  36 int test_long_fname_1(void)
  37 {
  38         return test_long_fname_2();
  39 }
  40
  41 SEC("dummy_tracepoint")
  42 int _dummy_tracepoint(void *arg)
  43 {
  44         return test_long_fname_1();
  45 }
  46
  47 char _license[] SEC("license") = "GPL";