tools/testing/selftests/bpf/progs/loop5.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 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 }