1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2018 Facebook */
3 #include <linux/bpf.h>
4 #include "bpf_helpers.h"
5 #include "bpf_legacy.h"
6 
7 int _version SEC("version") = 1;
8 
9 struct ipv_counts {
10 	unsigned int v4;
11 	unsigned int v6;
12 };
13 
14 /* just to validate we can handle maps in multiple sections */
15 struct bpf_map_def SEC("maps") btf_map_legacy = {
16 	.type = BPF_MAP_TYPE_ARRAY,
17 	.key_size = sizeof(int),
18 	.value_size = sizeof(long long),
19 	.max_entries = 4,
20 };
21 
22 BPF_ANNOTATE_KV_PAIR(btf_map_legacy, int, struct ipv_counts);
23 
24 struct {
25 	__uint(type, BPF_MAP_TYPE_ARRAY);
26 	__uint(max_entries, 4);
27 	__type(key, int);
28 	__type(value, struct ipv_counts);
29 } btf_map SEC(".maps");
30 
31 struct dummy_tracepoint_args {
32 	unsigned long long pad;
33 	struct sock *sock;
34 };
35 
36 __attribute__((noinline))
37 int test_long_fname_2(struct dummy_tracepoint_args *arg)
38 {
39 	struct ipv_counts *counts;
40 	int key = 0;
41 
42 	if (!arg->sock)
43 		return 0;
44 
45 	counts = bpf_map_lookup_elem(&btf_map, &key);
46 	if (!counts)
47 		return 0;
48 
49 	counts->v6++;
50 
51 	/* just verify we can reference both maps */
52 	counts = bpf_map_lookup_elem(&btf_map_legacy, &key);
53 	if (!counts)
54 		return 0;
55 
56 	return 0;
57 }
58 
59 __attribute__((noinline))
60 int test_long_fname_1(struct dummy_tracepoint_args *arg)
61 {
62 	return test_long_fname_2(arg);
63 }
64 
65 SEC("dummy_tracepoint")
66 int _dummy_tracepoint(struct dummy_tracepoint_args *arg)
67 {
68 	return test_long_fname_1(arg);
69 }
70 
71 char _license[] SEC("license") = "GPL";
72