Contributors: 7
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Taehee Yoo |
162 |
43.55% |
3 |
25.00% |
| Alexei Starovoitov |
155 |
41.67% |
1 |
8.33% |
| Eric W. Biedermann |
46 |
12.37% |
3 |
25.00% |
| Christoph Hellwig |
6 |
1.61% |
2 |
16.67% |
| Wei Yongjun |
1 |
0.27% |
1 |
8.33% |
| Konstantin Khlebnikov |
1 |
0.27% |
1 |
8.33% |
| Paul Gortmaker |
1 |
0.27% |
1 |
8.33% |
| Total |
372 |
|
12 |
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/init.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/bpfilter.h>
#include <uapi/linux/bpf.h>
#include <linux/wait.h>
#include <linux/kmod.h>
#include <linux/fs.h>
#include <linux/file.h>
struct bpfilter_umh_ops bpfilter_ops;
EXPORT_SYMBOL_GPL(bpfilter_ops);
void bpfilter_umh_cleanup(struct umd_info *info)
{
fput(info->pipe_to_umh);
fput(info->pipe_from_umh);
put_pid(info->tgid);
info->tgid = NULL;
}
EXPORT_SYMBOL_GPL(bpfilter_umh_cleanup);
static int bpfilter_mbox_request(struct sock *sk, int optname, sockptr_t optval,
unsigned int optlen, bool is_set)
{
int err;
mutex_lock(&bpfilter_ops.lock);
if (!bpfilter_ops.sockopt) {
mutex_unlock(&bpfilter_ops.lock);
request_module("bpfilter");
mutex_lock(&bpfilter_ops.lock);
if (!bpfilter_ops.sockopt) {
err = -ENOPROTOOPT;
goto out;
}
}
if (bpfilter_ops.info.tgid &&
thread_group_exited(bpfilter_ops.info.tgid))
bpfilter_umh_cleanup(&bpfilter_ops.info);
if (!bpfilter_ops.info.tgid) {
err = bpfilter_ops.start();
if (err)
goto out;
}
err = bpfilter_ops.sockopt(sk, optname, optval, optlen, is_set);
out:
mutex_unlock(&bpfilter_ops.lock);
return err;
}
int bpfilter_ip_set_sockopt(struct sock *sk, int optname, sockptr_t 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, USER_SOCKPTR(optval), len,
false);
}
static int __init bpfilter_sockopt_init(void)
{
mutex_init(&bpfilter_ops.lock);
bpfilter_ops.info.tgid = NULL;
bpfilter_ops.info.driver_name = "bpfilter_umh";
return 0;
}
device_initcall(bpfilter_sockopt_init);