blob: 41ce83da78e8b5302889cb36bae60a399e9898d0 (
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
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#define __unused __attribute__((unused))
struct {
__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
__uint(max_entries, 1);
__uint(key_size, sizeof(__u32));
__uint(value_size, sizeof(__u32));
} jmp_table SEC(".maps");
int done = 0;
SEC("tc")
int classifier_0(struct __sk_buff *skb __unused)
{
done = 1;
return 0;
}
static __noinline
int subprog_tail(struct __sk_buff *skb)
{
/* Don't propagate the constant to the caller */
volatile int ret = 1;
bpf_tail_call_static(skb, &jmp_table, 0);
return ret;
}
SEC("tc")
int entry(struct __sk_buff *skb)
{
/* Have data on stack which size is not a multiple of 8 */
volatile char arr[1] = {};
return subprog_tail(skb);
}
char __license[] SEC("license") = "GPL";
|
