1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/bpf.h>
4#include <bpf/bpf_helpers.h>
5
6char _license[] SEC("license") = "GPL";
7
8struct {
9	__uint(type, BPF_MAP_TYPE_HASH);
10	__uint(max_entries, 2);
11	__type(key, struct bigelement);
12	__type(value, __u32);
13} hash_map SEC(".maps");
14
15struct {
16	__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
17	__uint(max_entries, 1);
18	__type(key, __u32);
19	__type(value, struct bigelement);
20} key_map SEC(".maps");
21
22struct bigelement {
23	int a;
24	char b[4096];
25	long long c;
26};
27
28SEC("raw_tracepoint/sys_enter")
29int bpf_hash_large_key_test(void *ctx)
30{
31	int zero = 0, value = 42;
32	struct bigelement *key;
33
34	key = bpf_map_lookup_elem(&key_map, &zero);
35	if (!key)
36		return 0;
37
38	key->c = 1;
39	if (bpf_map_update_elem(&hash_map, key, &value, BPF_ANY))
40		return 0;
41
42	return 0;
43}
44
45