xref: /linux/tools/testing/selftests/bpf/progs/kfunc_call_test_subprog.c (revision cdd5b5a9761fd66d17586e4f4ba6588c70e640ea) 
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2021 Facebook */
3 #include "../bpf_testmod/bpf_testmod_kfunc.h"
4 
5 extern const int bpf_prog_active __ksym;
6 int active_res = -1;
7 int sk_state_res = -1;
8 
f1(struct __sk_buff * skb)9 int __noinline f1(struct __sk_buff *skb)
10 {
11 	struct bpf_sock *sk = skb->sk;
12 	int *active;
13 
14 	if (!sk)
15 		return -1;
16 
17 	sk = bpf_sk_fullsock(sk);
18 	if (!sk)
19 		return -1;
20 
21 	active = (int *)bpf_per_cpu_ptr(&bpf_prog_active,
22 					bpf_get_smp_processor_id());
23 	if (active)
24 		active_res = *active;
25 
26 	sk_state_res = bpf_kfunc_call_test3((struct sock *)sk)->__sk_common.skc_state;
27 
28 	return (__u32)bpf_kfunc_call_test1((struct sock *)sk, 1, 2, 3, 4);
29 }
30 
31 SEC("tc")
kfunc_call_test1(struct __sk_buff * skb)32 int kfunc_call_test1(struct __sk_buff *skb)
33 {
34 	return f1(skb);
35 }
36 
37 char _license[] SEC("license") = "GPL";
38