22 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/* Copyright (c) 2020 Facebook */3#include <stddef.h>4#include <linux/bpf.h>5#include <bpf/bpf_helpers.h>6#include "bpf_misc.h"7 8__noinline int foo(struct __sk_buff *skb)9{10 return bpf_get_prandom_u32();11}12 13SEC("cgroup_skb/ingress")14__success15int global_func8(struct __sk_buff *skb)16{17 if (!foo(skb))18 return 0;19 20 return 1;21}22