blob: 8b438128f46b8aa74ddd4115bd132ef24ec9ac4c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
char _license[] SEC("license") = "GPL";
struct {
__uint(type, BPF_MAP_TYPE_HASH);
__uint(max_entries, 2);
__type(key, struct bigelement);
__type(value, __u32);
} hash_map SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
__uint(max_entries, 1);
__type(key, __u32);
__type(value, struct bigelement);
} key_map SEC(".maps");
struct bigelement {
int a;
char b[4096];
long long c;
};
SEC("raw_tracepoint/sys_enter")
int bpf_hash_large_key_test(void *ctx)
{
int zero = 0, value = 42;
struct bigelement *key;
key = bpf_map_lookup_elem(&key_map, &zero);
if (!key)
return 0;
key->c = 1;
if (bpf_map_update_elem(&hash_map, key, &value, BPF_ANY))
return 0;
return 0;
}
|
