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// SPDX-License-Identifier: GPL-2.0
#include <linux/uaccess.h>
#include <linux/bpfilter.h>
#include <uapi/linux/bpf.h>
#include <linux/wait.h>
#include <linux/kmod.h>
int (*bpfilter_process_sockopt)(struct sock *sk, int optname,
char __user *optval,
unsigned int optlen, bool is_set);
EXPORT_SYMBOL_GPL(bpfilter_process_sockopt);
int bpfilter_mbox_request(struct sock *sk, int optname, char __user *optval,
unsigned int optlen, bool is_set)
{
if (!bpfilter_process_sockopt) {
int err = request_module("bpfilter");
if (err)
return err;
if (!bpfilter_process_sockopt)
return -ECHILD;
}
return bpfilter_process_sockopt(sk, optname, optval, optlen, is_set);
}
int bpfilter_ip_set_sockopt(struct sock *sk, int optname, char __user *optval,
unsigned int optlen)
{
return bpfilter_mbox_request(sk, optname, optval, optlen, true);
}
int bpfilter_ip_get_sockopt(struct sock *sk, int optname, char __user *optval,
int __user *optlen)
{
int len;
if (get_user(len, optlen))
return -EFAULT;
return bpfilter_mbox_request(sk, optname, optval, len, false);
}
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