162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci// Copyright (c) 2019 Facebook 362306a36Sopenharmony_ci#include <linux/bpf.h> 462306a36Sopenharmony_ci#include <bpf/bpf_helpers.h> 562306a36Sopenharmony_ci 662306a36Sopenharmony_cichar _license[] SEC("license") = "GPL"; 762306a36Sopenharmony_ci 862306a36Sopenharmony_ciSEC("socket") 962306a36Sopenharmony_ciint while_true(volatile struct __sk_buff* skb) 1062306a36Sopenharmony_ci{ 1162306a36Sopenharmony_ci int i = 0; 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci while (1) { 1462306a36Sopenharmony_ci if (skb->len) 1562306a36Sopenharmony_ci i += 3; 1662306a36Sopenharmony_ci else 1762306a36Sopenharmony_ci i += 7; 1862306a36Sopenharmony_ci if (i == 9) 1962306a36Sopenharmony_ci break; 2062306a36Sopenharmony_ci barrier(); 2162306a36Sopenharmony_ci if (i == 10) 2262306a36Sopenharmony_ci break; 2362306a36Sopenharmony_ci barrier(); 2462306a36Sopenharmony_ci if (i == 13) 2562306a36Sopenharmony_ci break; 2662306a36Sopenharmony_ci barrier(); 2762306a36Sopenharmony_ci if (i == 14) 2862306a36Sopenharmony_ci break; 2962306a36Sopenharmony_ci } 3062306a36Sopenharmony_ci return i; 3162306a36Sopenharmony_ci} 32