1#include <linux/kernel.h>
 2#include <linux/module.h>
 3#include <linux/netdevice.h>
 4
 5#include "notifier-error-inject.h"
 6
 7static int priority;
 8module_param(priority, int, 0);
 9MODULE_PARM_DESC(priority, "specify netdevice notifier priority");
10
11static 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
26static struct dentry *dir;
27
28static 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
44static void netdev_err_inject_exit(void)
45{
46	unregister_netdevice_notifier(&netdev_notifier_err_inject.nb);
47	debugfs_remove_recursive(dir);
48}
49
50module_init(netdev_err_inject_init);
51module_exit(netdev_err_inject_exit);
52
53MODULE_DESCRIPTION("Netdevice notifier error injection module");
54MODULE_LICENSE("GPL");
55MODULE_AUTHOR("Nikolay Aleksandrov <razor@blackwall.org>");