blob: 13e9c62e216ff010bcace555da96daabb708fe67
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>"); |
56 |