File: test_cgroup_link.c

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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Facebook
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>

int calls = 0;
int alt_calls = 0;

SEC("cgroup_skb/egress")
int egress(struct __sk_buff *skb)
{
	__sync_fetch_and_add(&calls, 1);
	return 1;
}

SEC("cgroup_skb/egress")
int egress_alt(struct __sk_buff *skb)
{
	__sync_fetch_and_add(&alt_calls, 1);
	return 1;
}

char _license[] SEC("license") = "GPL";