GNU Linux-libre 4.19.211-gnu1
[releases.git] / lib / netdev-notifier-error-inject.c
1 #include <linux/kernel.h>
2 #include <linux/module.h>
3 #include <linux/netdevice.h>
4
5 #include "notifier-error-inject.h"
6
7 static int priority;
8 module_param(priority, int, 0);
9 MODULE_PARM_DESC(priority, "specify netdevice notifier priority");
10
11 static struct notifier_err_inject netdev_notifier_err_inject = {
12         .actions = {
13                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_REGISTER) },
14                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEMTU) },
15                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGENAME) },
16                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRE_UP) },
17                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRE_TYPE_CHANGE) },
18                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_POST_INIT) },
19                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEMTU) },
20                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEUPPER) },
21                 { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEUPPER) },
22                 {}
23         }
24 };
25
26 static struct dentry *dir;
27
28 static int netdev_err_inject_init(void)
29 {
30         int err;
31
32         dir = notifier_err_inject_init("netdev", notifier_err_inject_dir,
33                                        &netdev_notifier_err_inject, priority);
34         if (IS_ERR(dir))
35                 return PTR_ERR(dir);
36
37         err = register_netdevice_notifier(&netdev_notifier_err_inject.nb);
38         if (err)
39                 debugfs_remove_recursive(dir);
40
41         return err;
42 }
43
44 static void netdev_err_inject_exit(void)
45 {
46         unregister_netdevice_notifier(&netdev_notifier_err_inject.nb);
47         debugfs_remove_recursive(dir);
48 }
49
50 module_init(netdev_err_inject_init);
51 module_exit(netdev_err_inject_exit);
52
53 MODULE_DESCRIPTION("Netdevice notifier error injection module");
54 MODULE_LICENSE("GPL");
55 MODULE_AUTHOR("Nikolay Aleksandrov <razor@blackwall.org>");