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_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
  20struct dummy_tracepoint_args {
  21        unsigned long long pad;
  22        struct sock *sock;
  23};
  24
  25__attribute__((noinline))
  26static int test_long_fname_2(struct dummy_tracepoint_args *arg)
  27{
  28        struct ipv_counts *counts;
  29        int key = 0;
  30
  31        if (!arg->sock)
  32                return 0;
  33
  34        counts = bpf_map_lookup_elem(&btf_map, &key);
  35        if (!counts)
  36                return 0;
  37
  38        counts->v6++;
  39
  40        return 0;
  41}
  42
  43__attribute__((noinline))
  44static int test_long_fname_1(struct dummy_tracepoint_args *arg)
  45{
  46        return test_long_fname_2(arg);
  47}
  48
  49SEC("dummy_tracepoint")
  50int _dummy_tracepoint(struct dummy_tracepoint_args *arg)
  51{
  52        return test_long_fname_1(arg);
  53}
  54
  55char _license[] SEC("license") = "GPL";
  56