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