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 
7 extern const int bpf_prog_active __ksym;
8 extern __u64 bpf_kfunc_call_test1(struct sock *sk, __u32 a, __u64 b,
9 				  __u32 c, __u64 d) __ksym;
10 extern struct sock *bpf_kfunc_call_test3(struct sock *sk) __ksym;
11 int active_res = -1;
12 int sk_state_res = -1;
13 
14 int __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 
36 SEC("classifier")
37 int kfunc_call_test1(struct __sk_buff *skb)
38 {
39 	return f1(skb);
40 }
41 
42 char _license[] SEC("license") = "GPL";
43