tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 int bpf_kfunc_call_test2(struct sock *sk, __u32 a, __u32 b) __ksym;
8extern __u64 bpf_kfunc_call_test1(struct sock *sk, __u32 a, __u64 b,
9 __u32 c, __u64 d) __ksym;
10
11SEC("classifier")
12int kfunc_call_test2(struct __sk_buff *skb)
13{
14 struct bpf_sock *sk = skb->sk;
15
16 if (!sk)
17 return -1;
18
19 sk = bpf_sk_fullsock(sk);
20 if (!sk)
21 return -1;
22
23 return bpf_kfunc_call_test2((struct sock *)sk, 1, 2);
24}
25
26SEC("classifier")
27int kfunc_call_test1(struct __sk_buff *skb)
28{
29 struct bpf_sock *sk = skb->sk;
30 __u64 a = 1ULL << 32;
31 __u32 ret;
32
33 if (!sk)
34 return -1;
35
36 sk = bpf_sk_fullsock(sk);
37 if (!sk)
38 return -1;
39
40 a = bpf_kfunc_call_test1((struct sock *)sk, 1, a | 2, 3, a | 4);
41 ret = a >> 32; /* ret should be 2 */
42 ret += (__u32)a; /* ret should be 12 */
43
44 return ret;
45}
46
47char _license[] SEC("license") = "GPL";