33 lines
501 B
C
33 lines
501 B
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2019 Facebook
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#include <linux/bpf.h>
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#include "bpf_helpers.h"
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#define barrier() __asm__ __volatile__("": : :"memory")
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char _license[] SEC("license") = "GPL";
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SEC("socket")
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int while_true(volatile struct __sk_buff* skb)
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{
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int i = 0;
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while (1) {
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if (skb->len)
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i += 3;
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else
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i += 7;
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if (i == 9)
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break;
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barrier();
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if (i == 10)
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break;
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barrier();
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if (i == 13)
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break;
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barrier();
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if (i == 14)
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break;
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}
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return i;
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}
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