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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_tcp_helpers.h"
extern int bpf_kfunc_call_test2(struct sock *sk, __u32 a, __u32 b) __ksym;
extern __u64 bpf_kfunc_call_test1(struct sock *sk, __u32 a, __u64 b,
__u32 c, __u64 d) __ksym;
SEC("tc")
int kfunc_call_test2(struct __sk_buff *skb)
{
struct bpf_sock *sk = skb->sk;
if (!sk)
return -1;
sk = bpf_sk_fullsock(sk);
if (!sk)
return -1;
return bpf_kfunc_call_test2((struct sock *)sk, 1, 2);
}
SEC("tc")
int kfunc_call_test1(struct __sk_buff *skb)
{
struct bpf_sock *sk = skb->sk;
__u64 a = 1ULL << 32;
__u32 ret;
if (!sk)
return -1;
sk = bpf_sk_fullsock(sk);
if (!sk)
return -1;
a = bpf_kfunc_call_test1((struct sock *)sk, 1, a | 2, 3, a | 4);
ret = a >> 32; /* ret should be 2 */
ret += (__u32)a; /* ret should be 12 */
return ret;
}
char _license[] SEC("license") = "GPL";
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