32 lines
449 B
C
32 lines
449 B
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
// Copyright (c) 2019 Facebook
|
||
|
|
#include <linux/bpf.h>
|
||
|
|
#include <bpf/bpf_helpers.h>
|
||
|
|
|
||
|
|
char _license[] SEC("license") = "GPL";
|
||
|
|
|
||
|
|
SEC("socket")
|
||
|
|
int while_true(volatile struct __sk_buff* skb)
|
||
|
|
{
|
||
|
|
int i = 0;
|
||
|
|
|
||
|
|
while (1) {
|
||
|
|
if (skb->len)
|
||
|
|
i += 3;
|
||
|
|
else
|
||
|
|
i += 7;
|
||
|
|
if (i == 9)
|
||
|
|
break;
|
||
|
|
barrier();
|
||
|
|
if (i == 10)
|
||
|
|
break;
|
||
|
|
barrier();
|
||
|
|
if (i == 13)
|
||
|
|
break;
|
||
|
|
barrier();
|
||
|
|
if (i == 14)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return i;
|
||
|
|
}
|