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 8 char _license[] SEC("license") = "GPL"; 9 10 SEC("socket") 11 int 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 } 21