| 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 | char _license[] SEC("license") = "GPL"; |
| 7 | |
| 8 | SEC("socket") |
| 9 | int while_true(volatile struct __sk_buff* skb) |
| 10 | { |
| 11 | int i = 0; |
| 12 | |
| 13 | while (1) { |
| 14 | if (skb->len) |
| 15 | i += 3; |
| 16 | else |
| 17 | i += 7; |
| 18 | if (i == 9) |
| 19 | break; |
| 20 | barrier(); |
| 21 | if (i == 10) |
| 22 | break; |
| 23 | barrier(); |
| 24 | if (i == 13) |
| 25 | break; |
| 26 | barrier(); |
| 27 | if (i == 14) |
| 28 | break; |
| 29 | } |
| 30 | return i; |
| 31 | } |
| 32 |