| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (c) 2019 Facebook | ||||
| 3 | #include <linux/bpf.h> | ||||
| 4 | #include "bpf_helpers.h" | ||||
| 5 | |||||
| 6 | char _license[] SEC("license") = "GPL"; | ||||
| 7 | |||||
| 8 | SEC("socket") | ||||
| 9 | int combinations(volatile struct __sk_buff* skb) | ||||
| 10 | { | ||||
| 11 | int ret = 0, i; | ||||
| 12 | |||||
| 13 | #pragma nounroll | ||||
| 14 | for (i = 0; i < 20; i++) | ||||
| 15 | if (skb->len) | ||||
| 16 | ret |= 1 << i; | ||||
| 17 | return ret; | ||||
| 18 | } | ||||