LXR linux/tools/testing/selftests/bpf/progs/kfunc_call_test

   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("classifier")
  37int kfunc_call_test1(struct __sk_buff *skb)
  38{
  39        return f1(skb);
  40}
  41
  42char _license[] SEC("license") = "GPL";
  43