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#include <linux/uaccess.h>
3#include <linux/bpfilter.h>
4#include <uapi/linux/bpf.h>
5#include <linux/wait.h>
6#include <linux/kmod.h>
7
8int (*bpfilter_process_sockopt)(struct sock *sk, int optname,
9 char __user *optval,
10 unsigned int optlen, bool is_set);
11EXPORT_SYMBOL_GPL(bpfilter_process_sockopt);
12
13static int bpfilter_mbox_request(struct sock *sk, int optname,
14 char __user *optval,
15 unsigned int optlen, bool is_set)
16{
17 if (!bpfilter_process_sockopt) {
18 int err = request_module("bpfilter");
19
20 if (err)
21 return err;
22 if (!bpfilter_process_sockopt)
23 return -ECHILD;
24 }
25 return bpfilter_process_sockopt(sk, optname, optval, optlen, is_set);
26}
27
28int bpfilter_ip_set_sockopt(struct sock *sk, int optname, char __user *optval,
29 unsigned int optlen)
30{
31 return bpfilter_mbox_request(sk, optname, optval, optlen, true);
32}
33
34int bpfilter_ip_get_sockopt(struct sock *sk, int optname, char __user *optval,
35 int __user *optlen)
36{
37 int len;
38
39 if (get_user(len, optlen))
40 return -EFAULT;
41
42 return bpfilter_mbox_request(sk, optname, optval, len, false);
43}