1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2018 Facebook */
3 #include <linux/bpf.h>
4 #include "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 struct dummy_tracepoint_args {
21 	unsigned long long pad;
22 	struct sock *sock;
23 };
24 
25 __attribute__((noinline))
26 static 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))
44 static int test_long_fname_1(struct dummy_tracepoint_args *arg)
45 {
46 	return test_long_fname_2(arg);
47 }
48 
49 SEC("dummy_tracepoint")
50 int _dummy_tracepoint(struct dummy_tracepoint_args *arg)
51 {
52 	return test_long_fname_1(arg);
53 }
54 
55 char _license[] SEC("license") = "GPL";
56