1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2021 Facebook */
 3#include <linux/bpf.h>
 4#include <bpf/bpf_helpers.h>
 5#include "bpf_tcp_helpers.h"
 6
 7extern const int bpf_prog_active __ksym;
 8extern __u64 bpf_kfunc_call_test1(struct sock *sk, __u32 a, __u64 b,
 9				  __u32 c, __u64 d) __ksym;
10extern struct sock *bpf_kfunc_call_test3(struct sock *sk) __ksym;
11int active_res = -1;
12int sk_state_res = -1;
13
14int __noinline f1(struct __sk_buff *skb)
15{
16	struct bpf_sock *sk = skb->sk;
17	int *active;
18
19	if (!sk)
20		return -1;
21
22	sk = bpf_sk_fullsock(sk);
23	if (!sk)
24		return -1;
25
26	active = (int *)bpf_per_cpu_ptr(&bpf_prog_active,
27					bpf_get_smp_processor_id());
28	if (active)
29		active_res = *active;
30
31	sk_state_res = bpf_kfunc_call_test3((struct sock *)sk)->sk_state;
32
33	return (__u32)bpf_kfunc_call_test1((struct sock *)sk, 1, 2, 3, 4);
34}
35
36SEC("tc")
37int kfunc_call_test1(struct __sk_buff *skb)
38{
39	return f1(skb);
40}
41
42char _license[] SEC("license") = "GPL";