loop4.c

 1// SPDX-License-Identifier: GPL-2.0
 2// Copyright (c) 2019 Facebook
 3#include <linux/bpf.h>
 4#include <bpf/bpf_helpers.h>
 5
 6#include "bpf_compiler.h"
 7
 8char _license[] SEC("license") = "GPL";
 9
10SEC("socket")
11int combinations(volatile struct __sk_buff* skb)
12{
13	int ret = 0, i;
14
15	__pragma_loop_no_unroll
16	for (i = 0; i < 20; i++)
17		if (skb->len)
18			ret |= 1 << i;
19	return ret;
20}