// SPDX-License-Identifier: GPL-2.0 | |
// Copyright (c) 2019 Facebook | |
#include <linux/bpf.h> | |
#include "bpf_helpers.h" | |
#define barrier() __asm__ __volatile__("": : :"memory") | |
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; | |
} |