1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun #include <linux/kernel.h>
3*4882a593Smuzhiyun #include <linux/module.h>
4*4882a593Smuzhiyun #include <linux/netdevice.h>
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include "notifier-error-inject.h"
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun static int priority;
9*4882a593Smuzhiyun module_param(priority, int, 0);
10*4882a593Smuzhiyun MODULE_PARM_DESC(priority, "specify netdevice notifier priority");
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun static struct notifier_err_inject netdev_notifier_err_inject = {
13*4882a593Smuzhiyun .actions = {
14*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_REGISTER) },
15*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEMTU) },
16*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGENAME) },
17*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRE_UP) },
18*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRE_TYPE_CHANGE) },
19*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_POST_INIT) },
20*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEMTU) },
21*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEUPPER) },
22*4882a593Smuzhiyun { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEUPPER) },
23*4882a593Smuzhiyun {}
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun static struct dentry *dir;
28*4882a593Smuzhiyun
netdev_err_inject_init(void)29*4882a593Smuzhiyun static int netdev_err_inject_init(void)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun int err;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun dir = notifier_err_inject_init("netdev", notifier_err_inject_dir,
34*4882a593Smuzhiyun &netdev_notifier_err_inject, priority);
35*4882a593Smuzhiyun if (IS_ERR(dir))
36*4882a593Smuzhiyun return PTR_ERR(dir);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun err = register_netdevice_notifier(&netdev_notifier_err_inject.nb);
39*4882a593Smuzhiyun if (err)
40*4882a593Smuzhiyun debugfs_remove_recursive(dir);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return err;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
netdev_err_inject_exit(void)45*4882a593Smuzhiyun static void netdev_err_inject_exit(void)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun unregister_netdevice_notifier(&netdev_notifier_err_inject.nb);
48*4882a593Smuzhiyun debugfs_remove_recursive(dir);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun module_init(netdev_err_inject_init);
52*4882a593Smuzhiyun module_exit(netdev_err_inject_exit);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun MODULE_DESCRIPTION("Netdevice notifier error injection module");
55*4882a593Smuzhiyun MODULE_LICENSE("GPL");
56*4882a593Smuzhiyun MODULE_AUTHOR("Nikolay Aleksandrov <razor@blackwall.org>");
57